CN120186800A

CN120186800A - A communication method and a communication device

Info

Publication number: CN120186800A
Application number: CN202311768001.6A
Authority: CN
Inventors: 韩成成; 郭志恒; 谢信乾
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2023-12-20
Filing date: 2023-12-20
Publication date: 2025-06-20
Also published as: WO2025130343A1

Abstract

The present application provides a communication method and a communication device. The method includes: receiving a first synchronization signal block, the first synchronization signal block includes a first synchronization signal, and the first synchronization signal is associated with N1 first reference signals; measuring the signal strength of the first synchronization signal and the N1 first reference signals to obtain a first measurement result; determining a third beam from the first beam and M1 second beams according to the first measurement result; and/or determining a fourth beam from at least one beam used by the first communication device according to the first measurement result. Among them, the first beam is a transmission beam of the first synchronization signal, the M1 second beams are transmission beams of the N1 first reference signals, the third beam is a transceiver beam of the second communication device when communicating with the first communication device, and the fourth beam is a transceiver beam of the first communication device when communicating with the second communication device.

Description

Communication method and communication device

Technical Field

The present application relates to the field of communications, and in particular, to a communication method and a communication device.

Background

In a communication system, signal synchronization is particularly important as a starting point for establishing communication between a terminal device and a network device. The signal synchronization includes downlink signal synchronization and/or uplink signal synchronization, the downlink signal synchronization is realized by searching a synchronization signal block (synchronization signal/PBCH block, SSB) periodically sent by the network device at a specific position, and the uplink signal synchronization is realized by the terminal device executing a random access procedure with the network device. For example, the network device may employ SSB transmissions via different beams at different times, and the terminal device scans the beams, typically selecting the SSB beam with the greatest signal strength as the initial beam, and establishing an appropriate beam pair between the network device and the terminal device for subsequent access and data transmission. As another example, the terminal device and the network device may perform contention-based random access or non-contention-based random access.

The research finds that the time delay of beam scanning or measurement in the current signal synchronization process is larger, and the random access performance is seriously damaged. Therefore, how to improve random access performance is a problem that needs to be considered currently.

Disclosure of Invention

In order to solve the technical problems, the application provides a communication method and a communication device, which can improve random access performance.

In a first aspect, a method of communication is provided. The method may be performed by the first communication device or may be performed by another body, which is not limited in this regard. For convenience of description, an example will be described below as being executed by the first communication apparatus. The first communication device may be a terminal device, a chip or a circuit in the terminal device, or a functional module in the terminal device capable of calling and executing a program.

The method comprises the steps of receiving a first synchronization signal block, wherein the first synchronization signal block comprises a first synchronization signal, the first synchronization signal is associated with N1 first reference signals, N1 is a positive integer, measuring signal strengths of the first synchronization signal and the N1 first reference signals to obtain a first measurement result, determining a third beam from a first beam and M1 second beams according to the first measurement result, wherein the third beam is a receiving and transmitting beam of a second communication device when the third beam is communicated with the first communication device, the first beam is a transmitting beam of the first synchronization signal, the M1 second beams are transmitting beams of the N1 first reference signals, and M1 is a positive integer, and/or determining a fourth beam from at least one beam used by the first communication device according to the first measurement result, wherein the fourth beam is a receiving and transmitting beam of the first communication device when the fourth beam is communicated with the second communication device.

Illustratively, the first synchronization signal block may represent one synchronization signal block and the first synchronization signal may represent one synchronization signal. In the present application, the first synchronization signal may be an SSB, for example, the SSB includes a first primary synchronization signal (primary synchronization signals, PSS), a first secondary synchronization signal (secondary synchronization signals, SSS), a first physical broadcast channel (physical broadcast channel, PBCH) and a first demodulation reference signal (demodulation REFERENCE SIGNAL, DMRS), or the first synchronization signal may also include other signals and/or channels, and the structure or components of the first synchronization signal are not limited in detail in the present application.

For ease of description, in the present application, the third beam may be referred to as an SSB beam, or a network device side beam, and the fourth beam may be referred to as a terminal device side beam. The first communication device may transmit downlink data to the second communication device using the third beam and receive uplink data from the second communication device using the third beam. Accordingly, the first communication device can receive downlink data from the second communication device by using the fourth beam, and send uplink data to the second communication device by using the fourth beam, so that random access and transmission performance are effectively improved.

According to the scheme provided by the application, the first synchronization signal is associated with the first reference signal, so that the first communication device can determine the corresponding first reference signal after receiving the first synchronization signal and the signal strength of the first reference signal, the beam with the highest (or higher) signal strength is selected as the receiving and transmitting beam (namely the third beam) of the second communication device side by measuring the signal strength of the first synchronization signal and the first reference signal, the third beam is indicated to the second communication device in the random access process, the second communication device can communicate with the terminal equipment by adopting the third beam, thereby acquiring higher beam gain in the subsequent communication, namely the channel transmission quality is improved, further, the random access performance and the transmission performance between the first communication device and the second communication device are also improved due to the improvement of the channel quality, and/or the first communication device can determine the corresponding first reference signal after receiving the first synchronization signal and the first reference signal, and the receiving beam with the highest (or higher) signal strength is selected as the first communication device on the first communication device side by measuring the RSRP (or higher) measured value of the first synchronization signal, thereby acquiring higher random access performance between the first communication device and the second communication device by adopting the receiving beam with the second beam as the subsequent communication device, namely the first communication device, namely the random access performance is improved due to the improvement of the first communication device in the random access quality, thereby the random access performance is improved in the subsequent communication device.

In the embodiment of the application, a third beam is selected from a first beam for transmitting a first synchronization signal and M1 second beams for transmitting N1 first reference signals, and is used as a transceiving beam when a subsequent second communication device communicates with the first communication device, and a fourth beam is selected from at least one beam used by the first communication device, and is used as a transceiving beam when the subsequent first communication device communicates with the second communication device, namely, a beam pair formed by the third beam and the fourth beam is used for subsequent communication, so as to acquire higher beam gain. This is because the first communication device measures the signal strength of the first synchronization signal and the first reference signal using at least one beam on the first communication device side, so that one or more beams with higher beam gain on the second communication device side can be determined, the beam gains of a plurality of beam pairs between the first communication device and the second communication device are decoupled, the first communication device can conveniently determine the beam pair with higher beam gain in a shorter measurement time, so as to improve the channel quality of subsequent communication and improve the transmission performance.

With reference to the first aspect, in certain implementations of the first aspect, the first synchronization signal is associated with N1 first reference signals, including that the first synchronization signal block further includes N1 first reference signals. That is, the first synchronization signal block may include the first synchronization signal and the first reference signal, or the first synchronization signal block may be composed of the first synchronization signal and the first reference signal.

With reference to the first aspect, in some implementation manners of the first aspect, determining the third beam from the first beam and the M1 second beams according to the first measurement result includes determining M2 fifth beams from the first beam and the M1 second beams according to the first measurement result, selecting one beam from the M2 fifth beams as the third beam, where the signal strength of the fifth beam is greater than or equal to a first threshold, the first threshold is preset, and M2 is a positive integer.

In other words, the third beam may be one beam selected from M2 fifth beams, the M2 fifth beams being one or more beams selected from the first beam and the M1 second beams according to the first measurement result.

It should be noted that when m2=1, one of the fifth beams having a signal strength greater than the first threshold is indicated, and the third beam is equivalent to the fifth beam, that is, the step of selecting one of the M2 fifth beams as the third beam may be omitted, and when M2 is greater than 1, there are a plurality of fifth beams having a signal strength greater than the first threshold, that is, the first communication device may randomly select one of the plurality of fifth beams as the third beam, and the randomly selected one of the plurality of fifth beams may be the fifth beam having the greatest signal strength, which is not limited in the present application.

Illustratively, the first threshold value satisfies { -156dBm to-31 dBm }, i.e., the first threshold value may be any one of-156 dBm to-31 dBm. For example, the protocol predefines a correspondence between RSRP parameter configuration or index and a first threshold, where the RSRP parameter configuration or index takes values from 0 to 127. For example, when the value of the RSRP parameter configuration or index is 0, the value of the corresponding first threshold is-156 dBm, when the value of the RSRP parameter configuration or index is 127, the value of the corresponding first threshold is-31 dBm, and so on.

With reference to the first aspect, in some implementations of the first aspect, the method further includes receiving a second synchronization signal block, where the second synchronization signal block includes a second synchronization signal, where the second synchronization signal is associated with N2 second reference signals, where N2 is a positive integer, measuring signal strengths of the second synchronization signal and the N2 second reference signals to obtain a second measurement result, and determining a third beam from a sixth beam and M3 seventh beams according to the second measurement result, where the sixth beam is a transmission beam of the second synchronization signal, and the M3 seventh beams are transmission beams of the N2 second reference signals, where M3 is a positive integer.

The number of synchronization signals transmitted from the second communication apparatus to the first communication apparatus is not limited in the present application.

With reference to the first aspect, in certain implementations of the first aspect, the second synchronization signal is associated with N2 second reference signals, including that the second synchronization signal block further includes N2 second reference signals.

With reference to the first aspect, in some implementation manners of the first aspect, determining the third beam from the sixth beam and the M3 seventh beams according to the second measurement result includes determining M4 eighth beams from the sixth beam and the M3 seventh beams according to the second measurement result, selecting one beam from the M4 eighth beams and the M2 fifth beams as the third beam, where the signal strength of the eighth beam is greater than or equal to a second threshold, the second threshold is preset, and M4 is a positive integer.

In other words, the third beam may be one beam selected from M4 eighth beams and M2 fifth beams, wherein the M4 eighth beams are one or more beams determined from the sixth beam and the M3 seventh beams according to the second measurement result.

It should be noted that when m4=1, one eighth beam having a signal strength greater than the second threshold value is described, or when M4 is greater than 1, there are a plurality of eighth beams having a signal strength greater than the second threshold value, that is, the first communication device needs to randomly select one beam from M4 eighth beams and M2 fifth beams as the third beam, and the randomly selected one beam may be the largest signal strength of the M2 fifth beams and M4 eighth beams, which is not limited in this application.

Illustratively, the second threshold value satisfies { -156dBm to-31 dBm }, i.e., the second threshold value may be any one of-156 dBm to-31 dBm. For example, the protocol predefines a correspondence between RSRP parameter configuration or index and a second threshold, where the RSRP parameter configuration or index takes values from 0 to 127. For example, when the value of the RSRP parameter configuration or index is 0, the value of the corresponding second threshold is-156 dBm, when the value of the RSRP parameter configuration or index is 127, the value of the corresponding second threshold is-31 dBm, and so on.

Alternatively, the values of the first threshold and the second threshold in the embodiment of the present application may be the same.

With reference to the first aspect, in certain implementations of the first aspect, the third beam is a first beam, or the third beam is one of M1 second beams, or the third beam is a sixth beam, or the third beam is one of M3 seventh beams. That is, the third beam may be one beam used for transmitting a synchronization signal (for example, the first synchronization signal or the second synchronization signal), or one beam used for transmitting a reference signal (for example, M1 second beams), and by adding a selectable beam pair, a beam with the best or better signal strength is selected from the beams for receiving and transmitting communications between the subsequent first communication device and the second communication device, so as to obtain a higher beam gain, that is, improve the channel transmission quality.

With reference to the first aspect, in certain implementation manners of the first aspect, the method further includes transmitting indication information to the second communication device, the indication information indicating the third beam.

It should be understood that "indicating" or "indicating" may include both direct and indirect indications. For example, the indication information includes an identification of the third beam, or other information that may be used to determine the third beam.

In one implementation, the indication information includes a first Preamble (Preamble), and the third beam is determined according to the first Preamble and a first mapping relationship, where the first mapping relationship is used to indicate a mapping relationship between a plurality of beams and a plurality of preambles, the plurality of beams includes a plurality of beams in the first beam, M1 second beams, sixth beams, or M3 seventh beams, the plurality of preambles includes a Preamble corresponding to the first beam, a Preamble corresponding to each second beam, a Preamble corresponding to the sixth beam, or a plurality of preambles in the Preamble corresponding to each seventh beam, and the first Preamble is one of the plurality of preambles.

In another implementation, the indication information includes a first random access channel (RACH occipital, RO), and the third beam is determined according to a first RO and a second mapping relationship, where the second mapping relationship is used to indicate a mapping relationship between a plurality of beams and a plurality of ROs, the plurality of beams includes a plurality of beams in a first beam, M1 second beams, a sixth beam, or M3 seventh beams, and the plurality of ROs includes an RO corresponding to the first beam, an RO corresponding to each second beam, an RO corresponding to the sixth beam, or a plurality of ROs in an RO corresponding to each seventh beam, and the first RO is one of the plurality of ROs.

With reference to the first aspect, in certain implementations of the first aspect, the first beam is different from at least one of the M1 second beams.

In other words, assuming m1=1, the first beam is different from the second beam, assuming M1 is greater than 1, for example m1=2, the first beam is different from at least one of the 2 second beams, for example, the first beam is different from the second beam #1 and the second beam #2, wherein the second beam #1 may be the same as or different from the second beam #2, and the present application is not limited thereto, or the first beam is the same as the second beam #1 but the first beam is different from the second beam #2, i.e., the second beam #1 is also different from the second beam # 2.

Alternatively, the second beam includes a first beam, or the second beam also includes other beams different from the first beam.

Optionally, the first beam is identical to at least one of the M1 second beams, i.e. the first beam is identical to one or more of the M1 second beams.

With reference to the first aspect, in certain implementations of the first aspect, one or more of the N1 first reference signals corresponds to one of the M1 second beams.

In other words, one second beam corresponds to one or more first reference signals, for example, the second communication device transmits one second reference signal using one second beam, or the second communication device transmits a plurality of first reference signals using one second beam. That is, there are a plurality of second beams corresponding to a plurality of first reference signals, for example, there are 2 second beams, the second beam #1 is used to transmit the first reference signal #1, the second beam #2 is used to transmit the first reference signal #2, the first reference signal #3, and the like.

With reference to the first aspect, in some implementations of the first aspect, the M1 second beams include a ninth beam and a tenth beam, the ninth beam is used for transmitting N3 first reference signals in the N1 first reference signals, the tenth beam is used for transmitting N4 first reference signals except for the N3 first reference signals in the N1 first reference signals, the N3 first reference signals occupy first resources, and the N4 first reference signals occupy second resources.

Illustratively, the frequency domain resource of the first resource and the frequency domain resource of the second resource are not identical.

It should be appreciated that the frequency domain resources of the first resource and the frequency domain resources of the second resource are not identical and may include that the frequency domain resources of the first resource and the frequency domain resources of the second resource are not identical or that the frequency domain resources of the first resource and the frequency domain resources of the second resource are partially identical. For example, the first resource includes frequency domain resource #1 on symbol #0 and symbol #1, and the second resource includes frequency domain resource #2 on symbol #0 and symbol # 1. For another example, the first resource includes frequency domain resource #1 on symbol #0 and symbol #1, and the second resource includes frequency domain resource #1 on symbol #2, and frequency domain resources #0 to #2 on symbol #2, i.e., the frequency domain resource of the first resource and the frequency domain resource of the second resource partially overlap.

Alternatively, the frequency domain resource of the first resource and the frequency domain resource of the second resource may be identical. For example, the first resource includes frequency domain resource #1 and frequency domain resource #2 on symbol #0, and the second resource includes frequency domain resource #1 and frequency domain resource #2 on symbol #1. For another example, the first resources include frequency domain resources #1 on symbol #0 and frequency domain resources #2 on symbol #1, and the second resources include frequency domain resources #2 on symbol #0 and frequency domain resources #1 on symbol #1.

Optionally, the frequency domain resource of the first resource and the frequency domain resource of the second resource occupy all or part of the frequency domain resource of the fourth resource.

Illustratively, the first resource or the second resource comprises at least one orthogonal frequency division multiplexing (orthogonal frequency division multiplexing, OFDM) symbol, N3 and N4 are both positive integers.

Optionally, the time domain resource of the first resource and the time domain resource of the second resource occupy all or part of the time domain resource of the fourth resource. For example, the fourth resource occupies 4 OFDM symbols, and the first resource or the second resource occupies one or more of the 4 OFDM symbols.

With reference to the first aspect, in some implementations of the first aspect, the first synchronization signal occupies a third resource, the N1 first reference signals occupy a fourth resource, and a frequency domain resource of the third resource and a frequency domain resource of the fourth resource do not overlap at all.

It should be understood that the frequency domain resources of the third resource and the frequency domain resources of the fourth resource do not overlap at all, meaning that the frequency domain resources of the third resource and the frequency domain resources of the fourth resource are not identical at all.

Illustratively, assuming that the N1 first reference signals include N3 first reference signals and N4 first reference signals, the fourth resource includes a first resource and a second resource, where N3 and N4 are positive integers, and n3+n4 is equal to or less than N1.

Alternatively, the frequency domain resource of the third resource and the frequency domain resource of the fourth resource may be identical or partially overlap, which is not limited in the present application.

Illustratively, the time domain resource of the fourth resource occupies Q OFDM symbols, Q being one of 1,2,3, 4, or 8.

For example, M1 is equal to Q, that is, the number of second beams is the same as the number of OFDM symbols occupied by the first reference signal, or, M1 second beams are in one-to-one correspondence with the OFDM symbols occupied by the first reference signal, or, each second beam occupies one OFDM symbol, and each first reference signal occupies one OFDM symbol.

With reference to the first aspect, in some implementations of the first aspect, the time domain resource of the fourth resource is located after the time domain resource unit of the third resource, or the time domain resource of the fourth resource is the same as the time domain resource of the third resource, or the time domain resource of the third resource is included in the time domain resource of the fourth resource, or the time domain resource of the fourth resource is included in the time domain resource of the third resource, or a gap between a starting position of a first time unit occupied by the first synchronization signal set and a starting position of a second time unit occupied by the first reference signal set is 5ms, the first synchronization signal is included in the first synchronization signal set, the first reference signal is included in the first reference signal set, or the first synchronization signal set occupies the third time unit, the first reference signal set occupies the fourth time unit, the first synchronization signal is included in the first synchronization signal set, and the third time unit and the fourth time unit are 5ms.

Based on the above scheme, by setting the time-domain interval of 5m, firstly, the time delay can be reduced, the beam scanning is not required to be performed in the whole 20ms period, secondly, the method can be suitable for various SSB burst configurations, namely, the position of the first reference signal and the position of the first synchronization signal are not overlapped, so that the receiving and transmitting conflict is not generated, thirdly, the method is convenient for the network equipment to schedule the PUSCH resource, and because the resource for scheduling the PUSCH resource and the resource for the first synchronization signal belong to a front-to-back field frame relation (field offset) in one frame, the two positions are fixed, and the frequency spectrum fragmentation can be reduced.

With reference to the first aspect, in some implementations of the first aspect, the M1 second beams include an 11 th beam and a 12 th beam, N3 first reference signals in the N1 first reference signals correspond to the 11 th beam, N4 first reference signals in the N1 first reference signals except for the N3 first reference signals correspond to the 12 th beam, and N3 and N4 are both positive integers. That is, the plurality of second beams are associated with the first reference signal, i.e., the second communication device can transmit the first reference signal using the 11 th beam and the 12 th beam. For example, when n3=n4=1, it is explained that one first reference signal is associated with one second beam.

With reference to the first aspect, in some implementations of the first aspect, the M1 second beams include a 13 th beam and a 14 th beam, the 13 th beam and the 14 th beam correspond to the N1 first reference signals, the M3 seventh beams include a 15 th beam and a 16 th beam, the 15 th beam and the 16 th beam correspond to the N2 second reference signals, wherein the N1 first reference signals occupy a first portion of frequency domain resources of the fourth resource, and the N2 second reference signals occupy a second portion of frequency domain resources of the fourth resource. That is, the plurality of second beams correlate the first reference signal, i.e., the second communication device may transmit the first reference signal using the 13 th and 14 th beams, and the plurality of seventh beams correlate the second reference signal, i.e., the second communication device may transmit the second reference signal using the 15 th and 16 th beams. For example, when n1=n2=1, it is explained that one first reference signal is associated with a plurality of second beams, and one second reference signal is associated with a plurality of second beams.

Optionally, the first portion and the second portion are identical, or the first portion and the second portion are continuous, or a first frequency separation is included between the first portion and the second portion.

With reference to the first aspect, in some implementations of the first aspect, N1 first reference signals or N2 second reference signals are used to carry a first sequence, where the first sequence includes any one of ZC sequences, m sequences, or gold sequences, and the length of the first sequence is any one of 240, 120, 60, 40, or 30 Resource Elements (REs).

In a second aspect, a communication method is provided. The method may be performed by the second communication device or may be performed by another body, which is not limited in this regard. For convenience of description, an example will be described below as being executed by the second communication apparatus. The second communication device may be a network device, or a chip or a circuit in the network device, or a Central Unit (CU) or a Distributed Unit (DU) in the network device, or a functional module in the network device capable of calling and executing a program. Illustratively, the network device includes a base station.

The method comprises the steps of sending a first synchronization signal block, wherein the first synchronization signal block comprises a first synchronization signal, the first synchronization signal is associated with N1 first reference signals, the first synchronization signal and the N1 first reference signals are used for determining a first measuring result, N1 is a positive integer, the first measuring result is used for determining a third wave beam from a first wave beam and M1 second wave beams, the third wave beam is a transmitting wave beam of a second communication device when the first communication device is communicated, the first wave beam is a transmitting wave beam of the first synchronization signal, M1 second wave beams are transmitting wave beams of the N1 first reference signals, M1 is a positive integer, and/or the first measuring result is used for determining a fourth wave beam from at least one wave beam used by the first communication device, and the fourth wave beam is a transmitting wave beam of the first communication device when the first communication device is communicated with the second communication device.

Illustratively, N1 may be one or more, e.g., 1, 2,3, 4, etc. M1 may be one of 1, 2,3, 4, or 8, or M1 may be a multiple of 2, such as one of 2, 4, 6, or 8.

With reference to the second aspect, in certain implementations of the second aspect, the first synchronization signal is associated with N1 first reference signals, including that the first synchronization signal block further includes N1 first reference signals.

With reference to the second aspect, in some implementations of the second aspect, the third beam may be one beam selected from M2 fifth beams, M2 fifth beams being one or more beams selected from the first beam and M1 second beams according to the first measurement result, M2 being a positive integer. The signal intensity of the fifth wave beam is larger than or equal to a first threshold value, and the first threshold value is preset.

With reference to the second aspect, in some implementations of the second aspect, the method further includes transmitting a second synchronization signal block, where the second synchronization signal block includes a second synchronization signal, the second synchronization signal is associated with N2 second reference signals, N2 is a positive integer, the second synchronization signal and the N2 second reference signals are used to measure to obtain a second measurement result, the second measurement result is used to determine a third beam from a sixth beam and M3 seventh beams, the sixth beam is a transmission beam of the second synchronization signal, the M3 seventh beams are transmission beams of the N2 second reference signals, and M3 is a positive integer.

With reference to the second aspect, in certain implementations of the second aspect, the second synchronization signal is associated with N2 second reference signals, including that the second synchronization signal block further includes N2 second reference signals.

With reference to the second aspect, in some implementations of the second aspect, determining the third beam from the sixth beam and the M3 seventh beams according to the second measurement result includes determining M4 eighth beams from the sixth beam and the M3 seventh beams according to the second measurement result, selecting one beam from the M4 eighth beams and the M2 fifth beams as the third beam, where the signal strength of the eighth beam is greater than or equal to a second threshold, the second threshold is preset, and M4 is a positive integer.

With reference to the second aspect, in certain implementations of the second aspect, the third beam is the first beam, or the third beam is one of M1 second beams, or the third beam is the sixth beam, or the third beam is one of M3 seventh beams.

With reference to the second aspect, in certain implementations of the second aspect, the method further includes receiving indication information from the first communication device, the indication information indicating the third beam.

With reference to the second aspect, in some implementations of the second aspect, the indication information includes a first preamble, and the third beam is determined according to the first preamble and a first mapping relationship, where the first mapping relationship is used to indicate a mapping relationship between a plurality of beams and a plurality of preambles, the plurality of beams includes a plurality of beams in the first beam, M1 second beams, sixth beams, or M3 seventh beams, and the plurality of preambles includes a preamble corresponding to the first beam, a preamble corresponding to each second beam, a preamble corresponding to the sixth beam, or a plurality of preambles in the preambles corresponding to each seventh beam, and the first preamble is one of the plurality of preambles.

With reference to the second aspect, in some implementations of the second aspect, the indication information includes a first RO, and the third beam is determined according to the first RO and a second mapping relationship, where the second mapping relationship is used to indicate a mapping relationship between a plurality of beams and a plurality of ROs, the plurality of beams includes a plurality of beams in the first beam, M1 second beams, sixth beams, or M3 seventh beams, the plurality of ROs includes an RO corresponding to the first beam, an RO corresponding to each second beam, an RO corresponding to the sixth beam, or a plurality of ROs in an RO corresponding to each seventh beam, and the first RO is one of the plurality of ROs.

With reference to the second aspect, in some implementations of the second aspect, the first beam is different from at least one of the M1 second beams.

With reference to the second aspect, in certain implementations of the second aspect, one or more of the N1 first reference signals corresponds to one of the M1 second beams.

With reference to the second aspect, in some implementations of the second aspect, the M1 second beams include a ninth beam and a tenth beam, the ninth beam is used to transmit N3 first reference signals in the N1 first reference signals, the tenth beam is used to transmit N4 first reference signals other than the N3 first reference signals in the N1 first reference signals, the N3 first reference signals occupy first resources, and the N4 first reference signals occupy second resources.

It should be appreciated that the frequency domain resources of the first resource and the frequency domain resources of the second resource are not identical and may include that the frequency domain resources of the first resource and the frequency domain resources of the second resource are not identical or that the frequency domain resources of the first resource and the frequency domain resources of the second resource are partially identical.

Alternatively, the frequency domain resource of the first resource and the frequency domain resource of the second resource may be identical.

Illustratively, the first resource or the second resource comprises at least one OFDM symbol, N3 and N4 being both positive integers.

Optionally, the time domain resource of the first resource and the time domain resource of the second resource occupy all or part of the time domain resource of the fourth resource.

With reference to the second aspect, in some implementations of the second aspect, the first synchronization signal occupies a third resource, the N1 first reference signals occupy a fourth resource, and a frequency domain resource of the third resource and a frequency domain resource of the fourth resource do not overlap at all.

With reference to the second aspect, in some implementations of the second aspect, the time domain resource of the fourth resource is located after the time domain resource unit of the third resource, or the time domain resource of the fourth resource is the same as the time domain resource of the third resource, or the time domain resource of the third resource is included in the time domain resource of the fourth resource, or the time domain resource of the fourth resource is included in the time domain resource of the third resource, or a space between a starting position of a first time unit occupied by the first synchronization signal set and a starting position of a second time unit occupied by the first reference signal set is 5ms, the first synchronization signal is included in the first synchronization signal set, the first reference signal is included in the first reference signal set, or the first synchronization signal set occupies the third time unit, the first reference signal set occupies the fourth time unit, the first synchronization signal is included in the first synchronization signal set, the first reference signal is included in the first reference signal set, and the third time unit and the fourth time unit are 5ms.

With reference to the second aspect, in some implementations of the second aspect, the M1 second beams include an 11 th beam and a 12 th beam, N3 first reference signals in the N1 first reference signals correspond to the 11 th beam, N4 first reference signals in the N1 first reference signals except for the N3 first reference signals correspond to the 12 th beam, and N3 and N4 are both positive integers.

With reference to the second aspect, in some implementations of the second aspect, the M1 second beams include a 13 th beam and a 14 th beam, the 13 th beam and the 14 th beam correspond to the N1 first reference signals, the M3 seventh beams include a 15 th beam and a 16 th beam, the 15 th beam and the 16 th beam correspond to the N2 second reference signals, wherein the N1 first reference signals occupy a first portion of frequency domain resources of the fourth resources, and the N2 second reference signals occupy a second portion of frequency domain resources of the fourth resources.

With reference to the second aspect, in some implementations of the second aspect, the N1 first reference signals or the N2 second reference signals are used to carry a first sequence, where the first sequence includes any one of ZC sequences, m sequences, or gold sequences, and the length of the first sequence is any one of 240, 120, 60, 40, or 30 REs.

Advantageous effects of the foregoing second aspect and certain implementation manners of the second aspect may correspond to descriptions of the first aspect and related implementation manners of the first aspect, which are not repeated herein.

In a third aspect, a first communication device is provided. The first communication device comprises a receiving and transmitting unit, a processing unit and a processing unit, wherein the receiving and transmitting unit is used for receiving a first synchronization signal block, the first synchronization signal block comprises a first synchronization signal, the first synchronization signal is associated with N1 first reference signals, N1 is a positive integer, the processing unit is used for measuring signal strengths of the first synchronization signal and the N1 first reference signals to obtain a first measurement result, the processing unit is further used for determining a third beam from a first beam and M1 second beams according to the first measurement result, the third beam is a receiving and transmitting beam of the second communication device when the third beam is communicated with the first communication device, the first beam is a transmitting beam of the first synchronization signal, M1 second beams are transmitting beams of the N1 first reference signals, and M1 is a positive integer, and/or the processing unit is used for determining a fourth beam from at least one beam used by the first communication device according to the first measurement result, and the fourth beam is a receiving and transmitting beam of the first communication device when the fourth beam is communicated with the second communication device.

The transceiver unit may perform the processing of the reception and transmission in the foregoing first aspect, and the processing unit may perform other processing than the reception and transmission in the foregoing first aspect.

In a fourth aspect, a second communication device is provided. The second communication device comprises a receiving and transmitting unit, a first communication device and a second communication device, wherein the receiving and transmitting unit is used for transmitting a first synchronization signal block, the first synchronization signal block comprises a first synchronization signal, the first synchronization signal is associated with N1 first reference signals, the first synchronization signal and the N1 first reference signals are used for determining a first measurement result, N1 is a positive integer, the first measurement result is used for determining a third beam from a first beam and M1 second beams, the third beam is a receiving and transmitting beam of the second communication device when the third beam is communicated with the first communication device, the first beam is a transmitting beam of the first synchronization signal, M1 second beams are transmitting beams of the N1 first reference signals, M1 is a positive integer, and/or the first measurement result is used for determining a fourth beam from at least one beam used by the first communication device, and the fourth beam is a receiving and transmitting beam of the first communication device when the fourth beam is communicated with the second communication device.

The transceiver unit may perform the processing of the reception and transmission in the foregoing second aspect, and the processing unit may perform other processing than the reception and transmission in the foregoing second aspect.

In a fifth aspect, a communication device is provided. The communication device may be the first communication device or the second communication device described above. The communication device comprises a transceiver, a processor for controlling the transceiver to transceive signals, and a memory for storing a computer program, the processor for calling and running the computer program from the memory, such that the communication device performs the method in any one of the possible implementations of the first or second aspect.

Optionally, the processor is one or more and the memory is one or more.

Alternatively, the memory may be integrated with the processor or the memory may be separate from the processor.

Optionally, the communication device further comprises a transmitter (transmitter) and a receiver (receiver).

In a sixth aspect, a communication system is provided. The communication system comprises a first communication device for performing the method in any of the possible implementations of the first aspect and a second communication device for performing the method in any of the possible implementations of the second aspect.

The first communication means may be, for example, a terminal device, or a chip or a circuit in a terminal device, or a functional module in a terminal device capable of invoking and executing a program.

The second communication means may be a network device, or a chip or a circuit in a network device, or a CU or a DU in a network device, or a functional module in a network device capable of invoking and executing a program, for example.

In a seventh aspect, a computer readable storage medium is provided. The computer readable storage medium stores computer program code or instructions which, when executed, cause the method of any one of the possible implementations of the first or second aspects described above to be implemented.

In an eighth aspect, a chip is provided. The chip comprises at least one processor coupled to a memory for storing a computer program which, when executed, causes the method of any one of the possible implementations of the first or second aspect described above to be carried out.

The chip may include, for example, an input circuit or interface for transmitting information or data, and an output circuit or interface for receiving information or data.

In a ninth aspect, a computer program product is provided. The computer program product comprising computer program code or instructions which, when executed, cause the method of any one of the possible implementations of the first or second aspects described above to be implemented.

In a tenth aspect, a computer program is provided. The computer program, when executed, causes the method of any one of the possible implementations of the first or second aspect to be implemented.

Drawings

Fig. 1 is a schematic diagram of a communication system suitable for use with the present application;

FIG. 2 is a schematic diagram of a time-frequency structure of an SSB;

FIG. 3 is a schematic diagram of an SSB beam scanning process;

fig. 4 is an interactive flow chart of a contention-based random access method;

FIG. 5 is an interactive flow chart of a communication method provided by the present application;

fig. 6 to fig. 9 are schematic diagrams of time-frequency resources of a first synchronization signal and a first reference signal according to an embodiment of the present application;

Fig. 10 and 11 are schematic structural diagrams of a first reference signal and a second beam according to an embodiment of the present application;

Fig. 12 is a schematic structural diagram of a first reference signal, a second reference signal, and a second beam according to an embodiment of the present application;

FIG. 13 is a schematic block diagram of a communication device provided by an embodiment of the present application;

fig. 14 is a schematic block diagram of another communication apparatus provided by an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings.

The technical solution of the embodiment of the present application may be applied to various communication systems, such as a long term evolution (long term evolution, LTE) system, an LTE frequency division duplex (frequency division duplex, FDD) system, an LTE time division duplex (time division duplex, TDD), a universal mobile telecommunications system (universal mobile telecommunication system, UMTS), a worldwide interoperability for microwave access (worldwide interoperability for microwave access, wiMAX) communication system, a fifth generation (5th generation,5G) system or New Radio (NR), and future communication systems, a vehicle-to-other device (vehicle-to-X V X), wherein V2X may include a vehicle-to-internet (vehicle to network, V2N), a vehicle-to-vehicle (V2V), a vehicle-to-infrastructure (vehicle to infrastructure, V2I), a vehicle-to-pedestrian (vehicle to pedestrian, V2P), etc., a vehicle-to-vehicle communication long term evolution technology (long term evolution-vehicle-V), a vehicle networking, a machine-type communication (MACHINE TYPE communication, MTC), an internet of things (internet of things, a machine-to-other device (V), a machine-to-long term evolution technology (585-to-M, machine-M, 96, etc.

Fig. 1 is a schematic diagram of a communication system according to an embodiment of the present application. As shown in fig. 1, the communication system 100 comprises at least one network device, such as the network device 110 shown in fig. 1, and the communication system 100 may further comprise at least one terminal device, such as the terminal device 120 and/or the terminal device 130 shown in fig. 1. The network device 110 and the terminal device 120 or the terminal device 130 may communicate via a wireless link to further interact information. It will be appreciated that the network device and the terminal device may also be referred to as communication devices or communication means.

The network device is a network side device with wireless transceiving function. The network device may be an apparatus in a radio access network (radio access network, RAN) that provides wireless communication functions for the terminal device, referred to as a RAN device. For example, the network device may be a base station (base station), an evolved NodeB (eNodeB), a next generation NodeB (gNB) in a 5G mobile communication system, a base station for 3GPP subsequent evolution, a transmission and reception point (transmission reception point, TRP), an access node in a WiFi system, a wireless relay node, a wireless backhaul node, and so on. In communication systems employing different radio access technologies (radio access technology, RATs), the names of base station capable devices may vary. For example, the LTE system may be referred to as an eNB or an eNodeB, the 5G system or an NR system may be referred to as a gNB, and the specific name of the base station is not limited in the present application. The network device may contain one or more co-sited or non-co-sited transmission and reception points. As another example, the network device can include at least one of one or more Centralized Units (CUs), one or more Distributed Units (DUs), and one or more Radio Units (RUs). in different systems, CUs (or CU-CP and CU-UP), DUs or RUs may also have different names, but the meaning will be understood by those skilled in the art. For example, the radio access network may also be an open radio access network (open radio access network, O-RAN) architecture, and in ORAN systems, a CU may also be referred to as an O-CU (open CU), a DU may also be referred to as an O-DU, a CU-CP may also be referred to as an O-CU-CP, a CU-UP may also be referred to as an O-CU-UP, and an RU may also be referred to as an O-RU. Any unit of CU (or CU-CP, CU-UP), DU and RU in the present application may be implemented by a software module, a hardware module, or a combination of software and hardware modules. Illustratively, the functionality of a CU may be implemented by one entity or by a different entity. For example, the functions of the CU are further split, that is, the control plane and the user plane are separated and implemented by different entities, that is, a control plane CU entity (i.e., a CU-CP entity) and a user plane CU entity (i.e., a CU-UP entity), which may be coupled to the DU, so as to jointly complete the functions of the access network device. For example, the CU is responsible for handling non-real time protocols and services, implementing the functions of the radio resource control (radio resource control, RRC), packet data convergence layer protocol (PACKET DATA convergence protocol, PDCP) layer. The DU is responsible for handling physical layer protocols and real-time services, and implements functions of a radio link control (radio link control, RLC) layer, a Medium Access Control (MAC) layer, and a Physical (PHY) layer. In this way part of the functionality of the radio access network device may be implemented by a plurality of network functional entities. These network function entities may be network elements in a hardware device, software functions running on dedicated hardware, or virtualized functions instantiated on a platform (e.g., a cloud platform). The network device may also include an active antenna unit (ACTIVE ANTENNA unit, AAU for short). The AAU realizes part of physical layer processing function, radio frequency processing and related functions of the active antenna. Since the information of the RRC layer may be eventually changed into or converted from the information of the PHY layer, under this architecture, higher layer signaling, such as RRC layer signaling, may also be considered to be transmitted by the DU or by the du+aau. it is understood that the network device may be a device comprising one or more of a CU node, a DU node, an AAU node. In addition, the CU may be divided into network devices in an access network (radio access network, RAN), or may be divided into network devices in a Core Network (CN), which the present application is not limited to. As another example, in the car-to-anything (vehicle to everything, V2X) technology, the access network device may be a Road Side Unit (RSU). The multiple access network devices in the communication system may be the same type of base station or different types of base stations. The base station may communicate with the terminal device or may communicate with the terminal device through the relay station. In the embodiment of the present application, the means for implementing the function of the network device may be the network device itself, or may be a means capable of supporting the network device to implement the function, for example, a chip system or a combination device or a component capable of implementing the function of the access network device, where the means may be installed in the network device. In the embodiment of the application, the chip system can be composed of chips, and can also comprise chips and other discrete devices.

The terminal device is a user side device with a wireless transceiving function, and may be a fixed device, a mobile device, a handheld device (for example, a mobile phone), a wearable device, a vehicle-mounted device, or a wireless apparatus (for example, a communication module, a modem, or a chip system) built in the above device. The terminal device is used for connecting people, objects, machines and the like, and can be widely used in various scenes, such as scenes of cellular communication, device-to-device (D2D) communication, machine-to-machine/machine-type communication (machine-to-machine/machine-type communications, M2M/MTC) communication, internet of things, virtual Reality (VR), augmented reality (augmented reality, AR), industrial control (industrial control), unmanned driving (SELF DRIVING), remote medical (remote media), smart grid (SMART GRID), smart furniture, smart office, smart wear, smart transportation, smart city (SMART CITY), unmanned plane, robot and the like. The terminal device may be a handheld terminal in cellular communication, a communication device in D2D, an internet of things device in MTC, a monitoring camera in intelligent transportation and smart city, or a communication device on an unmanned plane, etc., for example. A terminal device may sometimes be referred to as a User Equipment (UE), a user terminal, a user device, a subscriber unit, a subscriber station, a terminal, an access station, a UE station, a remote station, a mobile device, a wireless communication device, or the like. The terminal device may also be a terminal device in an IoT system. IoT is an important component of future information technology development, and its main technical feature is to connect an item with a network through a communication technology, so as to implement man-machine interconnection and an intelligent network for object interconnection. In the embodiment of the application, the IoT technology can achieve mass connection, deep coverage and terminal power saving through, for example, a Narrowband (NB) technology. In the embodiment of the present application, the device for implementing the function of the terminal device may be the terminal device, or may be a device capable of supporting the terminal device to implement the function, for example, a chip system or a combination device or a component capable of implementing the function of the terminal device, and the device may be installed in the terminal device.

The network equipment and the terminal equipment can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted, on water surface, and on aerial planes, balloons and satellites. In the embodiment of the application, the scene where the network equipment and the terminal equipment are located is not limited.

Illustratively, an application function (application function, AF) network element may also be included in the communication system 100, the AF network element being a control plane network function provided by the carrier network for providing application layer information, and a session management function (session management function, SMF) network element may also be included in the communication system 100, the SMF being a control plane network function provided by the carrier network. In the embodiment of the present application, in the case where the communication system 100 includes an AF network element and an SMF network element, the AF may send service-related information to the network device through the SMF.

To facilitate understanding of the embodiments of the present application, concepts and related processes involved in the present application will be described first.

(1) Beam (beam);

The beam may be embodied in the NR protocol as a spatial filter (spatial domain filter), or spatial filter (SPATIAL FILTER) or spatial parameter (SPATIAL PARAMETER). The beam used to transmit signals may be referred to as a transmit beam (transmission beam, tx beam), may be referred to as a spatial transmit filter (spatial domain transmission filter) or spatial transmit parameters (spatial transmission parameter), and the beam used to receive signals may be referred to as a receive beam (Rx beam), may be referred to as a spatial receive filter (spatial domain RECEIVE FILTER) or spatial receive parameters (spatial RX parameter).

The transmit beam may refer to a distribution of signal strengths formed in spatially different directions after signals are transmitted through the antennas, and the receive beam may refer to a distribution of signal strengths of wireless signals received from the antennas in spatially different directions. Furthermore, the beam may be a wide beam, or a narrow beam (or a beamlets), or other types of beams. It should be understood that a wide beam may refer to a beam having a greater transmission direction or transmission angle than a narrow beam, which may refer to a beam having a lesser transmission direction or transmission angle. The technique of forming the beam may be a beamforming technique or other technique. The beamforming technique may specifically be a digital beamforming technique, an analog beamforming technique, or a hybrid digital/analog beamforming technique, etc.

The beam generally corresponds to a resource, for example, when the beam measurement is performed, the network device measures different beams through different resources, so that the terminal device measures different beams on a given resource to obtain a measurement result, the terminal device feeds back the measured channel quality or the measured received signal strength of the given resource, and the network device knows the quality of the corresponding beam. At the time of data transmission, beam information is also indicated by its corresponding resource. For example, the network device indicates information of PDSCH beams through resources in the TCI of the DCI.

Alternatively, a plurality of beams having the same or similar communication characteristics are regarded as one beam. One or more antenna ports may be included in a beam for transmitting data channels, control channels, and sounding signals, etc. One or more antenna ports forming a beam may also be considered as a set of antenna ports.

(2) A resource;

In beam measurement, each beam of the network device corresponds to a resource, and thus the beam to which the resource corresponds can be uniquely identified by an index of the resource. The resource may be an uplink signal resource or a downlink signal resource. The uplink signals include, but are not limited to, sounding REFERENCE SIGNAL (SRS), demodulation reference signals DMRS. The downlink signals include, but are not limited to, channel state information reference signals (CHANNEL STATE information REFERENCE SIGNAL, CSIRS), cell-specific reference signals (CELL SPECIFIC REFERENCE SIGNAL, CS-RS), UE-specific reference signals (user equipment SPECIFIC REFERENCE SIGNAL, US-RS), DMRS, and synchronization signals/physical broadcast channel blocks (synchronization system/physical broadcast channel block, SS/PBCH blocks). Wherein, the SS/PBCH block may be simply referred to as a synchronization signal block (synchronization signal/PBCH block, SSB). The resources are configured by radio resource control signaling (radio resource control, RRC) signaling. In the configuration structure, a resource is a data structure, which includes relevant parameters of the corresponding uplink/downlink signals, such as the type of the uplink/downlink signals, the granularity of the resources carrying the uplink/downlink signals, the sending time and period of the uplink/downlink signals, the number of ports used for sending the uplink/downlink signals, and the like. The resources of each uplink/downlink signal have a unique index to identify the resources of the downlink signal. It will be appreciated that the index of a resource may also be referred to as an identification of the resource, and embodiments of the present application are not limited in this regard.

(3) Time-frequency resources;

In the embodiment of the application, the data or information can be carried through time-frequency resources. The time-frequency resources may include resources in the time domain (i.e., time domain resources) and resources in the frequency domain (i.e., frequency domain resources), among others.

In the time domain, a time domain resource may comprise one or more time domain units (or may also be referred to as time units), and a time unit may comprise several time domain resources. The time domain unit is, for example, a Radio Frame (RF), the time domain resource included in the time domain unit is, for example, a subframe (subframe), a frame, a half subframe, a half frame, or the like, a slot (slot), a mini-slot, a partial slot, or an Orthogonal Frequency Division Multiplexing (OFDM) symbol (symbol), or the like, or the time domain unit may be a set of one or more time domain resources, for example, the time domain unit is one or more OFDM symbols in one slot, for example, the number of the one or more OFDM symbols is 6, 7, 12, or 14, or the like. One or more time units may be continuous in time or may be discrete. In addition, the duration of the time slot may be related to the subcarrier (sub-CARRIER SPACE, SCS) interval. For example, the duration of one slot is 1 millisecond (ms) when the subcarrier interval is 15kHz, 0.5ms when the subcarrier interval is 30kHz, and 0.25ms when the subcarrier interval is 60 kHz. Similarly, when the subcarrier spacing is 15×2 ^μ kHz, the duration of one slot is 2 ^-μ ms, μ=0, 1, 2. Mu is a non-negative integer.

In the frequency domain, the frequency domain resources may include one or more frequency domain units. A frequency domain unit may be a Resource Element (RE), or a Resource Block (RB), or a subchannel, or a resource pool (resource pool), or a bandwidth part, BWP, or a carrier, CC, or a channel, or an interlace (RB), etc.

(4) NR cell search and downlink synchronization;

The downlink synchronization refers to that the terminal equipment performs synchronization of frequency, frame and symbol with the base station through a synchronization signal sequence which is periodically sent by the base station and is at a specific position. Only after the downlink synchronization, the terminal device can demodulate the master information block (master information block, MIB) and the system information block (systeminformation block, SIB) broadcast by the cell, so that the synchronization is the starting point for the terminal device to establish communication with the base station. Specifically, the effect of downlink synchronization includes the following points:

a) The terminal equipment searches a cell carrier center frequency point and realizes frequency synchronization with a carrier signal;

b) The terminal device obtains the bandwidth of the cell.

C) The terminal device is time synchronized with the 10ms frame of the cell.

D) The terminal device acquires information of the cell for communication.

In NR, downlink synchronization is achieved by the UE by searching SSB.

Fig. 2 is a schematic diagram of a time-frequency structure of SSB. The network equipment periodically transmits the SSB, and the terminal equipment completes downlink synchronization with the base station by receiving the SSB and obtains a system message. The SSB includes a primary synchronization signal PSS, a secondary synchronization signal SSS, a physical broadcast channel PBCH, and a DMRS for demodulating the PBCH. The SSB period may be 5ms, 10ms, 20ms, 40ms, 80ms, 160ms, etc., and may include a plurality of SSB signals (having different SSB indexes, e.g., SSB 0 to SSB 7, or SSB 1 to SSB 8), called one SSB burst, located in the first 5ms of the 10ms frame, where each SSB uses a different transmission beam but contains the same cell information. As shown in fig. 2, one SSB may occupy 4 OFDM symbols (e.g., symbol 0 to symbol 3) in the time domain, and may occupy 240 subcarriers or 240 REs, i.e., 20 Resource Blocks (RBs), in the frequency domain, where the PSS or SSS occupy time-frequency resources of 1 symbol and 127 subcarriers (or 127 REs), the PBCH occupies time-frequency resources of 3 symbols and 240 subcarriers (or 240 REs), and one of the symbols (e.g., symbol 2) is shared with the SSS.

In one example, the PSS sequence is located on 127 REs in the middle of the first symbol of the SSB (e.g., symbol 0) and may be generated by the following equation (1). The SSS sequence is located on 127 REs in the middle of the third symbol of SSB (e.g., symbol 2) and can be generated from the Gold sequence (i.e., the result of modulo double addition of two m-sequences) in the following equation (2).

d_pss(n)=1-2x(m); (1)

d_sss(n)＝[1-2x₀(n+m₀)mod127][1-2x₁(n+m₁)mod127]; (2)

Wherein n is 0-127,

The offsets of the two m sequences are respectively:

It is noted that x (m) is an m-sequence, which may be represented or generated by a linear feedback shift register, and SSS sequences may be represented or generated by a linear feedback shift register.

(5) SSB beam scanning;

The purpose of the initial beam scanning is to establish a suitable beam pair between the network device and the terminal device, the selected beam pair being used for subsequent access and data transmission, the selection of the suitable beam pair contributing to an improved channel quality of the communication process. The network device may transmit SSBs via different beams at different times in a time division manner. In the beam scanning process, the terminal device generally selects an SSB beam with the largest signal strength as an initial beam direction, and performs subsequent Physical Random Access Channel (PRACH) access.

Fig. 3 is a schematic diagram of an SSB beam scanning process. As shown in fig. 3, the time domain resources are divided by 1 frame every 10 ms. For example, the network device sends one SSB burst every 20ms, where one SSB burst includes 8 SSBs, each SSB is sent using one beam (may be referred to as an SSB beam), and the corresponding SSB index is denoted as { SSB0, SSB1, SSB7}, and typically one SSB burst needs to be sent in the first half frame of each frame, i.e., in 5ms, and the network device sends SSBs 0 to SSB7 at different times in 5 ms. For example, when the subcarrier spacing (subcarrier spacing, SCS) is 15kHz, 70 OFDM symbols are included in 5ms, and the starting OFDM symbol occupied by transmitting SSB0 to SSB7 may be {2,8,16,22,30,36,44,50}. In addition, the network device can use different beamforming weights to transmit SSB 0-SSB 7, so that the transmission directions of SSB 0-SSB 7 are different, and the whole coverage of the cell is formed. Correspondingly, the terminal equipment detects the signal strength (such as RSRP value) of SSB 0-SSB 7 and selects one SSB wave beam with the strongest signal from the signal strength to communicate. For example, UE1 determines that the signal strength received from SSB1 is the largest and UE2 determines that the signal strength received from SSB6 is the largest. Further, the terminal device may send a PRACH signal on a time-frequency resource corresponding to the selected SSB index for random access. The network device can determine the Beam at the network device side selected by the terminal device by receiving and analyzing the PRACH signal, and establish an initial Beam pair (Beam pair). In the data transmission process after the access is completed, the network device and the terminal device can manage and switch the wave beam through channel state information reference signals (channel stateinformation-REFERENCE SIGNAL, CSI-RS).

(6) Random access;

The terminal equipment acquires uplink synchronization through a random access process, and the access network performs communication. Among them, random access includes contention-based random access (which may also be called four-step random access) and non-contention-based random access (which may also be called two-step random access). Non-contention based access is typically used in cases where the terminal device has been able to successfully receive radio resource control (Radio Resource Control, RRC) signaling.

The random access procedure refers to a procedure before attempting to access the network from the time when the terminal device transmits a random access preamble (preamble) until a basic signaling connection is established with the network. It should be noted that, before the terminal device selects the random access channel timing (RACH occision, RO) for transmitting the preamble, the terminal device needs to select the uplink carrier. For example, in case of configuring a supplementary uplink (supplementary uplink, SUL) or a Normal Uplink (NUL), the terminal device may select whether to operate on the SUL or the NUL. After the uplink carrier is selected, the terminal device (e.g., the terminal device in RRC connected state) may need to perform a bandwidth part BWP operation. For example, when no RO is configured on the active upstream BWP of the terminal device, the terminal device needs to switch the active upstream BWP to the initial upstream BWP. After the uplink carrier or BWP operation is selected, the terminal device needs to perform Random Access (RA) type selection, which can be understood as whether the terminal device needs to perform two-step random access or four-step random access. Further, after determining the RA type, the terminal device needs to perform RACH resource selection, i.e., the terminal device can select the RO according to the selected synchronization signal block (Synchronization Signal/PBCH block, SSB) and the mapping relationship between the SSB and the RO. For example, one SSB may correspond to a plurality of ROs, or a plurality of SSBs may be mapped onto one RO.

Fig. 4 is a schematic flow chart of a contention-based random access method. Fig. 4 schematically illustrates an example in which a first communication apparatus is used as a terminal device and a second communication apparatus is used as a network device. The first communication device in fig. 4 may also be a chip or a circuit of a terminal device, and the second communication device may also be a chip or a circuit of a network device. As shown in fig. 4, the method comprises the steps of:

s410, the terminal device sends a random access preamble (preamble) to the network device.

Accordingly, the network device receives the random access preamble transmitted by the terminal device.

The terminal device sends a random access preamble, msg1, to the network device on PRACH resources, for example. Among them, PRACH resources can be understood as random access channel occasions (ROs). It should be understood that, before step S410, the terminal device may obtain, by reading the system broadcast information, the resource configuration for sending the PRACH, where the configuration information mainly includes the time-frequency resource location and the mapping relationship between SSB and RO, the mapping relationship between preamble and SSB, and so on.

S420, the network device sends a random access response (random access response, RAR) to the terminal device.

Accordingly, the terminal device receives the RAR from the network device.

Illustratively, the network device sends a random access response RAR, i.e. Msg2, to the terminal device based on the random access preamble. The RAR may include indication information indicating an uplink resource for transmitting the message 3 (map 3, msg 3), which may be understood that after the terminal device receives the RAR, the terminal device can learn about the uplink resource for transmitting the Msg 3.

It should be understood that before performing step S420, or after transmitting Msg1, the terminal device starts a random access response window, and listens for the RAR transmitted by the network device within the window. If the terminal device successfully detects its RAR, the random access is successful, and the terminal device may continue to send Msg3 according to the RAR indication, i.e. execute step S430. If the UE does not receive the RAR of the UE, the random access fails, and the terminal equipment reinitiates the random access process according to the rollback parameter indicated by the network equipment until the maximum random access times are reached.

S430, the terminal equipment sends Msg3 to the network equipment.

Accordingly, the network device receives Msg3 from the terminal device.

Illustratively, the terminal device sends Msg3 based on the RAR, the primary role of Msg3 is to send an RRC setup connection request. The Msg3 may include layer 2 (layer 2, l 2) information and/or layer 3 (layer 3, l 3) information, such as an RRC connection setup request message, and a beam failure recovery (beam failure recovery, BFR) MAC Control Element (CE), for example.

S440, the network device sends a contention resolution message to the terminal device.

Accordingly, the terminal device receives the contention resolution message from the network device.

Wherein, the contention resolution message includes an Identification (ID) of the terminal device. Alternatively, the contention resolution message may also be referred to as message 4 (message 4, msg 4), where Msg4 carries the contention resolution flag and the air interface parameter configuration for the terminal device.

Illustratively, in the event that the contention resolution of the terminal device is successful, the network device sends a contention resolution message to the terminal device. If the terminal equipment successfully receives the Msg4 and the Msg4 carries the conflict resolution identification, the random access is successful, otherwise, the random access fails. If successful, the terminal device may continue to send Msg5, the primary role of Msg5 being to send RRC setup complete command. If the random access process fails, the terminal equipment re-initiates the random access process according to the rollback parameter indicated by the network equipment until the maximum random access times are reached.

Optionally, in response to the downlink physical shared channel (physical downlink SHARE CHANNEL, PDSCH) carrying Msg4, the terminal device may send corresponding hybrid automatic repeat request-acknowledgement (HARQ-ACK) information through an uplink physical control channel (physical uplink control channel, PUCCH).

Further, when the network device determines from the Msg3 that the random access is a contention-based random access, information of terminal devices that need to contend is stored, and when contending is resolved by the Msg4, contention resolution is performed on the contending terminal devices.

It should be noted that fig. 4 is only a schematic diagram provided for the convenience of illustrating the four-step random access procedure, and the protection scope of the present application is not limited in any way, and the description of the four-step random access procedure may refer to the description in the related art.

(7) Beam management;

in one implementation, the network device and the terminal device manage and switch the beam by receiving and transmitting SSB and CSI-RS, including a data transmission stage from initial access to connection establishment of the terminal device, and a finishing process of service beam selection.

Beam management includes three beam (e.g., P1, P2, and P3) scanning procedures, which are described in detail below.

(A) Coarse alignment in the P1 process, namely SSB beam scanning of network equipment and wide beam scanning of terminal equipment;

The network device adopts a beam scanning mode in the coverage area of the cell to perform time-sharing transmission on SSB beams in different directions.

When the terminal equipment receives the signal, the signal is received by adopting a beam scanning mode according to the SSB time-frequency resource position informed in the system message (idle state initial access stage) or the RRC reconfiguration message (connection state data transmission stage), and SSB beams sent by the network equipment are measured. The number of times that the terminal device measures all SSB beams of the network device is related to the number of SSB beams of the network device, the number of beams of the terminal device and a beam scanning algorithm of the terminal device.

After the terminal equipment and the network equipment are scanned once, a P1 process coarse alignment result is obtained.

(B) Fine tuning of network equipment in the P2 process, namely scanning a CSI-RS for BM beam of the network equipment;

The network device scans again with a narrower CSI-RS for BM beam in the vicinity of the optimal (i.e., signal strength maximum) SSB beam (the network device can map the CSI-RS for BM beam with the optimal SSB beam by beam ID). The narrower CSI-RS for BM beam is understood to be a CSI-RS for BM beam with a narrower beam and a different beam direction, and the direction or width of the beam used in the P2 procedure is changed compared to the beam used in the P1 procedure. After the CSI-RS for BM beam is used for scanning, the terminal equipment feeds back a CSI-RS for BM measurement result to the network equipment through a measurement report, and the network equipment confirms the CSI-RS for BM beam for transmitting downlink signals. The beam may be multiplexed directly by the network device when it receives the upstream signal.

(C) Fine tuning terminal equipment in the P3 process, namely scanning narrow beams of the terminal equipment;

And when the network equipment CSI-RS for BM beam is fixed and the terminal equipment receives signals, the signal is received in a beam scanning mode according to the CSI-RS for BM time-frequency resource position informed in the RRC reconfiguration message of the network equipment, so that the narrow beam of the downlink signal received by the terminal equipment is determined. The beam may be multiplexed directly when the terminal device transmits the uplink signal.

After the P3 procedure is finished, the service beams of the terminal device and the network device are aligned.

In summary, the terminal device in downlink synchronization can complete beam selection in P1 stage (wide beam measurement SSB for the terminal device), in this implementation, the terminal device adopts wide beam to perform random access (beam gain is smaller), which results in the RACH detection performance of the terminal device at the edge being impaired, or the terminal device can complete beam selection by using multiple SSB bursts, in this implementation, the measurement delay of the terminal device in the process of performing beam selection is increased, which results in larger delay of random access.

In addition to the beam management procedure described above, the terminal device may send the preamble by using different narrow beam repetition on the terminal device side by sending the same preamble on at least two ROs by the terminal device on different ROs in RACH repetition (RACH repetition refers to that the terminal device sends the same preamble on at least two ROs in one PRACH transmission, and the network device receives and measures the RSRP of the preamble and feeds back the measurement result, thereby implementing beam selection on the terminal device side. It should be noted that, the preamble is repeatedly transmitted by using different narrow beams at the terminal device side, which is understood as that the terminal device repeatedly transmits the preamble using different beams, and the two different beams are two beams with different transmission directions and/or transmission angles (or widths). That is, the beam here refers to a beam on the terminal device side for scanning SSB signals. In the period of selecting the wide beam at the terminal equipment side, the terminal equipment can repeatedly send PRACH in different narrow beams on RO corresponding to the selected SSB beam, the network equipment receives and measures RSRP, determines the narrow beam at the terminal equipment side according to the comparison result of the RSRP measurement value, and carries the narrow beam at the terminal equipment side in the RAR sent at the step S420. It should be appreciated that the beam signal strength (or RSRP) of the narrow beam is greatest here, or, alternatively, the beam signal strength of the narrow beam is greater than some preset threshold.

In summary, the above implementation manner only realizes beam selection at the terminal device side, but since the beam used at the terminal device side (i.e. the UE side beam) and the beam transmitted by the network device side (i.e. the SSB beam) are not matched in the beam scanning process, that is, the link communication quality between the SSB beam and the UE side beam is unknown, so that the SSB beam scanning or measurement delay is larger, the random access performance of the terminal device is limited by the joint beam gain of the adopted beam pair at the terminal device side and the network device side, and the RACH performance is reduced. In addition, the above implementation manner does not implement SSB beam selection on the network device side, in any case, in the existing solution, beam selection on the network device side and/or beam selection on the terminal device side cannot be effectively implemented, that is, a beam with a larger beam gain cannot be used for communication, which causes a deterioration in random access performance. Therefore, how to improve random access performance is a problem to be solved.

In order to solve the technical problems, the application provides a communication method and a communication device, which can effectively realize beam selection at a network device side and/or beam selection at a terminal device side, thereby improving random access performance.

The communication method provided by the embodiment of the application will be described in detail below with reference to the accompanying drawings. The embodiment provided by the application can be applied to the communication system shown in the figure 1. The implementation main body of the embodiment of the present application described in detail with reference to fig. 5 may be the first communication device or the second communication device, or a chip or a circuit used for the first communication device or the second communication device, or a functional module capable of calling and executing a program in the first communication device or the second communication device. The first communication device may be a terminal device, and the second communication device may be a network device, or a CU or a distributed unit DU in the network device.

Fig. 5 is a flow chart of a communication method according to an embodiment of the present application. As shown in fig. 5, the method 500 includes the following steps.

S510, the second communication device transmits the first synchronization signal block to the first communication device.

Accordingly, the first communication device receives the first synchronization signal block from the second communication device.

The first synchronization signal block comprises first synchronization signals, the first synchronization signals are associated with N1 first reference signals, and N1 is a positive integer.

Illustratively, the first synchronization signal block may represent one synchronization signal block and the first synchronization signal may represent one synchronization signal. In the present application, the first synchronization signal may be an SSB, for example, the SSB includes a first primary synchronization signal PSS, a first secondary synchronization signal SSS, a first physical broadcast channel PBCH, and a first demodulation reference signal DMRS, or the first synchronization signal may also include other signals and/or channels, and the structure or the components of the first synchronization signal are not specifically limited in the present application.

In the application, N1 first reference signals are used for bearing a first sequence, wherein the first sequence comprises any one of ZC sequences, m sequences or gold sequences. Alternatively, the length of the first sequence may be any one of 240 REs, 120 REs, 60 REs, 40 REs, or 30 REs.

Illustratively, when the first sequence is a ZC sequence, the first sequence may be a cyclic extension ZC sequence of 240, 120, 60, 40 or 30 REs in length, for example, 239 cyclic extension to 240, 113 cyclic extension to 120, 59 cyclic extension to 60, 37 cyclic extension to 40, 29 cyclic extension to 30, or the first sequence may be prime numbers closest to the above value (240, 120, 60, 40 or 30), for example, the first sequence may be a ZC sequence of 239, 113, 59, 37, 29 REs in length, or the first sequence may be a ZC sequence truncated of prime numbers closest to the above value, for example, the first sequence may be a ZC sequence truncated sequence of 241 truncated to 240, 127 truncated to 120, 61 truncated to 60, 41 truncated to 40, 31 truncated to 30.

Illustratively, when the first sequence is an m-sequence or gold sequence, the first sequence may be a cyclically extended m-sequence or gold sequence of 240, 120, 60, 40 or 30 REs in length, for example, 239 cyclically extended to 240, 113 cyclically extended to 120, 59 cyclically extended to 60, 37 cyclically extended to 40, 29 cyclically extended to 30, or the first sequence may be (2 ^m -1) closest to the above value, for example, the first sequence may be an m-sequence or gold sequence of 127, 63, 31, 17 or 7 REs in length, or the first sequence may be a sequence cut-off of (2 ^m -1) closest to the above value, for example, the first sequence may be an m-sequence cut-off sequence or gold sequence of 255 cut-off to 240, 127 cut-off to 120, 63 cut-off to 60, 63 cut-off to 40, 31 cut-off to 30.

Alternatively, N1 may be an integer greater than or equal to 1, for example, 1,2,3, or 4, etc.

Alternatively, N1 may be a multiple of 2, such as one of 2, 4, 6, or 8.

In the application, the first synchronization signal is associated with N1 first reference signals, and the method can comprise that the first synchronization signal also comprises N1 first reference signals. That is, the first synchronization signal block may include the first synchronization signal and the first reference signal, or the first synchronization signal block may be composed of the first synchronization signal and the first reference signal.

Next, with respect to a positional relationship of time-frequency resources of the first synchronization signal and the first reference signal, a relationship between a beam of the first synchronization signal (i.e., a first beam) and a beam of the first reference signal (i.e., a second beam), a relationship between the first reference signal, the second reference signal, and the second beam will be described.

In one implementation, the first beam is different from at least one of the M1 second beams.

In other words, the second beam comprises the first beam, or the second beam further comprises other beams than the first beam.

For example, assuming m1=1, the first beam is different from the second beam, assuming that M1 is greater than 1, for example m1=2, the first beam is different from at least one of the 2 second beams, for example, the first beam is different from the second beam #1 and the second beam #2, where the second beam #1 may be the same as or different from the second beam #2, or the first beam is the same as the second beam #1 but the first beam is different from the second beam #2, i.e., the second beam #1 is different from the second beam # 2.

In another implementation, the first beam is the same as at least one of the M1 second beams.

In other words, the first beam is identical to one or more of the M1 second beams.

Illustratively, assuming m1=1, the first beam is identical to the second beam, assuming M1 is greater than 1, e.g., m1=2, the first beam is identical to at least one of the 2 second beams, e.g., the first beam is identical to the second beam #1, the second beam #2, i.e., the second beam #1 is identical to the second beam #2, or the first beam is identical to the second beam #1, but the first beam is not identical to the second beam #2, i.e., the second beam #1 is not identical to the second beam # 2.

In one implementation, one or more of the N1 first reference signals corresponds to one of the M1 second beams.

In other words, one second beam corresponds to one or more first reference signals.

The second communication device may transmit a second reference signal using a second beam, or the second communication device may transmit a plurality of first reference signals using a second beam. That is, there are a plurality of second beams corresponding to a plurality of first reference signals, for example, there are 2 second beams, the second beam #1 is used to transmit the first reference signal #1, the second beam #2 is used to transmit the first reference signal #2, or the second beam #1 is used to transmit the first reference signal #1, the second beam #2 is used to transmit the first reference signal #2 and the first reference signal #3, or the second beam #1 is used to transmit the first reference signal #1 and the first reference signal #2, the second beam #2 is used to transmit the first reference signal #2 and the first reference signal #3, and so on.

In one implementation, the M1 second beams include a ninth beam and a tenth beam, the ninth beam is used for transmitting N3 first reference signals in the N1 first reference signals, the tenth beam is used for transmitting N4 first reference signals except for the N3 first reference signals in the N1 first reference signals, the N3 first reference signals occupy first resources, the N4 first reference signals occupy second resources, and both N3 and N4 are positive integers.

Illustratively, the time domain resource of the first resource or the time domain resource of the second resource comprises at least one OFDM symbol, e.g. 4 symbols.

It should be understood that the frequency domain resources of the first resource and the frequency domain resources of the second resource are not identical, and it is understood that the frequency domain resources of the first resource and the frequency domain resources of the second resource are not identical or the frequency domain resources of the first resource and the frequency domain resources of the second resource are partially identical. For example, the first resource includes frequency domain resource #1 on symbol #0 and symbol #1, and the second resource includes frequency domain resource #2 on symbol #0 and symbol # 1. For another example, the first resource includes frequency domain resource #1 on symbol #0 and symbol #1, and the second resource includes frequency domain resource #1 on symbol #2, and frequency domain resources #0 to #2 on symbol #2, i.e., the frequency domain resource of the first resource and the frequency domain resource of the second resource partially overlap.

Illustratively, the frequency domain resource of the first resource and the frequency domain resource of the second resource may be identical. For example, the first resource includes frequency domain resource #1 and frequency domain resource #2 on symbol #0, and the second resource includes frequency domain resource #1 and frequency domain resource #2 on symbol #1. For another example, the first resources include frequency domain resources #1 on symbol #0 and frequency domain resources #2 on symbol #1, and the second resources include frequency domain resources #2 on symbol #0 and frequency domain resources #1 on symbol #1.

Alternatively, the frequency domain resource of the first resource and the frequency domain resource of the second resource may occupy all or part of the frequency domain resource of the fourth resource (i.e., the frequency domain resource occupied by the N1 first reference signals). For example, the fourth resource occupies frequency domain resource #1, the first resource may occupy frequency domain resource #2 in frequency domain resource #1, the second resource may occupy all other frequency domain resources #3 except for frequency domain resource #2 in frequency domain resource #1, or the first resource may occupy frequency domain resource #2 in frequency domain resource #1, the second resource may occupy frequency domain resource #3 in frequency domain resource #1, and at this time, frequency domain resource #1 further includes frequency domain resource #4. Alternatively, the frequency domain resource of the first resource and the frequency domain resource of the second resource may be completely different from the frequency domain resource of the fourth resource, which is not limited in the present application.

Alternatively, the time domain resource of the first resource and the time domain resource of the second resource may occupy all or part of the time domain resource of the fourth resource. For example, the fourth resource occupies 4 OFDM symbols (e.g., symbol 0-symbol 3), the first resource may occupy symbol 0 and symbol 2, the second resource may occupy symbol 1 and symbol 3, or the first resource and the second resource both occupy symbol 0-symbol 3, or the first resource may occupy symbol 0 and symbol 1, the second resource may occupy symbol 2 and symbol 3, or the first resource may occupy symbol 0 and symbol 1, and the second resource may occupy symbol 1-symbol 3. Alternatively, the time domain resource of the first resource and the time domain resource of the second resource may be completely different from the time domain resource of the fourth resource, which is not limited in the present application.

In one implementation, the first synchronization signal occupies a third resource, the N1 first reference signals occupy a fourth resource, and the frequency domain resource of the third resource and the frequency domain resource of the fourth resource do not overlap at all.

In another implementation manner, the first synchronization signal occupies a third resource, the N1 first reference signals occupy a fourth resource, and the frequency domain resource of the third resource and the frequency domain resource of the fourth resource may be identical or partially overlap, which is not limited in the present application.

Optionally, m1=q, that is, the number of second beams is the same as the number of OFDM symbols occupied by the first reference signal, or, M1 second beams are in one-to-one correspondence with the OFDM symbols occupied by the first reference signal, or, each second beam occupies one OFDM symbol, and each first reference signal occupies one OFDM symbol.

Optionally, M1> Q, that is, the number of second beams is greater than the number of OFDM symbols occupied by the first reference signal, or M1< Q, that is, the number of second beams is less than the number of OFDM symbols occupied by the first reference signal, which is not limited in the present application.

In one implementation, the first synchronization signal occupies a third resource and the N1 first reference signals occupy a fourth resource. The time domain resource of the fourth resource is located after the time domain resource unit of the third resource, or the time domain resource of the fourth resource is the same as the time domain resource of the third resource, or the time domain resource of the third resource is included in the time domain resource of the fourth resource, or the time domain resource of the fourth resource is included in the time domain resource of the third resource, or an interval between a starting position of a first time unit occupied by the first synchronization signal set and a starting position of a second time unit occupied by the first reference signal set is 5ms, the first synchronization signal is included in the first synchronization signal set, the first reference signal is included in the first reference signal set, the first reference signal set occupies the fourth time unit, the first synchronization signal is included in the first synchronization signal set, the first reference signal is included in the first reference signal set, and the third time unit and the fourth time unit are both 5ms.

Next, a positional relationship of the time-frequency resources of the first synchronization signal and the first reference signal will be described with reference to fig. 6 to 9.

It should be noted that, the first synchronization signal block in fig. 6 and fig. 7 includes the first synchronization signal and the first reference signal, where the first synchronization signal and the first reference signal may be regarded as a whole, the first synchronization signal in fig. 8 and fig. 9 is associated with the first reference signal, the first synchronization signal and the first reference signal are located on different time-frequency resources, and the structure and components of the first synchronization signal may be described with reference to fig. 2. The application adds the first reference signal in the existing SSB structure or associates the first reference signal for the existing SS to assist to complete the beam selection of the network equipment side and/or the beam selection of the terminal equipment side, thereby improving the random access performance and the communication efficiency.

Fig. 6 is a schematic structural diagram of a time-frequency resource between a first synchronization signal and a first reference signal according to an embodiment of the present application, where an abscissa represents a time-domain resource, for example, with an OFDM symbol as granularity, and an ordinate represents a frequency-domain resource, for example, with an RE or RB as granularity. As shown in fig. 6, the first synchronization signal and the first reference signal occupy different time domain resources in the time domain and occupy the same frequency domain resources in the frequency domain. Wherein, the first synchronization signal occupies symbol 0, symbol 1, symbol 2 and symbol 3 in the time domain, 4 symbols in total, and occupies 20 RBs in the frequency domain. The first reference signal is located after the first synchronization signal in the time domain, occupies symbol 4, symbol 5, symbol 6, and symbol 7, for a total of 4 symbols, and occupies 20 RBs in the frequency domain.

As shown in fig. 6 (a), the first reference signal includes 4 types of reference signals, for example, S1, S2, S3 and S4, wherein S1, S2, S3 and S4 occupy different frequency domain resources and do not overlap each other, respectively, and S1, S2, S3 and S4 occupy all frequency domain resources where the first synchronization signal is located. Alternatively, the frequency domain resources occupied by S1, S2, S3 and S4 may be equally spaced or unequally spaced, which is not limited by the present application. In addition, S1, S2, S3, and S4 may occupy the same symbol (e.g., symbol 4, symbol 5, symbol 6, or symbol 7) in a frequency division manner, and S1, S2, S3, and S4 may be repeatedly transmitted on symbol 4, symbol 5, symbol 6, or symbol 7.

As shown in fig. 6 (b), the first reference signal includes 2 types of reference signals, e.g., S1 and S2, wherein S1 and S2 occupy different frequency domain resources and do not overlap each other, respectively, and S1 and S2 occupy all frequency domain resources where the first synchronization signal is located. Alternatively, the frequency domain resources occupied by S1 and S2 may be equally spaced or unequally spaced. In addition, S1 and S2 may occupy the same symbol (e.g., symbol 4, symbol 5, symbol 6, or symbol 7) in a frequency division manner, and S1 and S2 may be repeatedly transmitted on symbol 4, symbol 5, symbol 6, or symbol 7.

As shown in fig. 6 (c), the first reference signal includes 4 types of reference signals, e.g., S1, S2, S3, and S4, wherein S1, S2, S3, and S4 occupy the same time-frequency resource, e.g., S1, S2, S3, and S4 each occupy all frequency-domain resources of the first synchronization signal, and S1, S2, S3, and S4 each occupy symbol 4, symbol 5, symbol 6, and symbol 7, that is, S1, S2, S3, and S4 are cyclically shifted in distribution over the same frequency-domain resources. Alternatively, the frequency domain resources occupied by S1, S2, S3 and S4 may be equally spaced or unequally spaced. In addition, S1, S2, S3, and S4 may occupy the same symbol (e.g., symbol 4, symbol 5, symbol 6, or symbol 7) in a frequency division manner, and S1, S2, S3, and S4 may be repeatedly transmitted on symbol 4, symbol 5, symbol 6, or symbol 7. The implementation can measure the signal quality of the beam used by the whole frequency domain resource and the signal quality of the beam used by all symbols.

It should be noted that the time-frequency resources occupied by S1, S2, S3 and S4 are merely examples given for easy understanding, and the location of the time-frequency resources occupied by S1, S2, S3 and S4 is not specifically limited in the present application. For example, S1, S2, S3, and S4 shown in fig. 6 may occupy different symbols and/or bandwidths, so long as it is guaranteed that one or more of S1, S2, S3, and S4 occupies symbol 4, symbol 5, symbol 6, and symbol 7, and one or more of S1, S2, S3, and S4 occupies part or all of the frequency domain resource where the first synchronization signal is located.

Fig. 7 is a schematic structural diagram of time-frequency resources between a first synchronization signal and a first reference signal according to an embodiment of the present application. Wherein the abscissa represents time domain resources, e.g. with OFDM symbols as granularity, and the ordinate represents frequency domain resources, e.g. with REs or RBs as granularity. As shown in fig. 7, the first synchronization signal and the first reference signal occupy the same time domain resource in the time domain and occupy different frequency domain resources in the frequency domain. The first synchronization signal occupies symbol 0, symbol 1, symbol 2 and symbol 3 simultaneously in the time domain, 4 symbols in total, and occupies 20 RBs in the frequency domain.

As shown in fig. 7 (a), the first reference signal occupies symbol 0, symbol 1, symbol 2, and symbol 3 simultaneously in the time domain for 4 symbols in total, and occupies 20 RBs in the frequency domain, which are different from the frequency domain resources of the first synchronization signal. The first reference signal comprises 2 types of reference signals, such as S1 and S2, wherein S1 and S2 occupy different frequency domain resources and do not overlap each other, respectively, and S1 and S2 occupy all frequency domain resources where the first synchronization signal is located. Alternatively, the frequency domain resources occupied by S1 and S2 may be equally spaced or unequally spaced. In addition, S1 and S2 may occupy the same symbol (e.g., symbol 0, symbol 1, symbol 2, or symbol 3) in a frequency division manner, and S1 and S2 may be repeatedly transmitted on symbol 0, symbol 1, symbol 2, or symbol 3.

As shown in fig. 7 (b), the first reference signal occupies symbol 2 and symbol 3 simultaneously in the time domain, occupies 2 symbols in total, and occupies 10 RBs in the frequency domain, which are different from the frequency domain resources of the first synchronization signal. The first reference signal includes 2 types of reference signals, e.g., S1 and S2, where S1 and S2 occupy different frequency domain resources and do not overlap each other, respectively, and S1 and S2 occupy portions of the frequency domain resources where the first synchronization signal is located. Alternatively, the frequency domain resources occupied by S1 and S2 may be equally spaced or unequally spaced. In addition, S1 and S2 may occupy the same symbol (e.g., symbol 2 or symbol 3) in a frequency division manner, and S1 and S2 may be repeatedly transmitted in symbol 2 and symbol 3.

Fig. 8 is a schematic structural diagram of time-frequency resources between a first synchronization signal and a first reference signal according to an embodiment of the present application. Wherein the abscissa represents time domain resources, e.g. with OFDM symbols as granularity, and the ordinate represents frequency domain resources, e.g. with REs or RBs as granularity. As shown in fig. 8, one SSB period (referred to as one SSB burst) may be 20ms, including 8 SSB signals (e.g., one SSB signal is a first synchronization signal, and 8 SSB signals are a first synchronization signal set), with different SSB indexes (index), e.g., SSB 0 to SSB 7, the SSB signals are located in the first 5ms of a 10ms frame, and each SSB uses different transmission beams but includes the same cell information. The first reference signal set includes 8 first reference signals (i.e., n1=8), which are located in the last 5ms of the 10ms frame to ensure that the measurement delay is less than 10ms, each first reference signal occupies 2 to 4 OFDM symbols, and the 8 first reference signals can be in one-to-one correspondence with 8 SSB signals. In the time domain, the start of the first set of synchronization signals differs from the start of the first set of reference signals by 5ms, and the first set of synchronization signals is located after the first set of reference signals. In the frequency domain, the frequency domain resources of the first synchronization signal set are the same as the frequency domain resources of the first reference signal set.

Fig. 9 is a schematic structural diagram of a time-frequency resource between a first synchronization signal and a first reference signal according to an embodiment of the present application, where an abscissa represents a time-domain resource, for example, with an OFDM symbol as granularity, and an ordinate represents a frequency-domain resource, for example, with an RE or RB as granularity. As shown in fig. 9, one SSB period may be 10ms, and includes 8 SSB signals (e.g., one SSB signal is a first synchronization signal, and 8 SSB signals are a first synchronization signal set), where the SSB signals are located in the first 5ms of the 10ms frame. The first reference signal set includes 8 first reference signals (i.e., n1=8), which are located in the first 5ms of the 10ms frame to ensure that the measurement delay is less than 10ms, each first reference signal occupies 2 to 4 OFDM symbols, and the 8 first reference signals can be in one-to-one correspondence with 8 SSB signals. In the time domain, the starting point of the first synchronization signal set is the same as the starting point of the first reference signal set, or the time domain resources of the first synchronization signal and the first reference signal are the same, and the same symbol is occupied. In the frequency domain, the frequency domain resources of the first synchronization signal set are different from those of the first reference signal set, or the first synchronization signal and the frequency domain resources of the first reference signal are not overlapped.

In a first implementation manner, the M1 second beams include an 11 th beam and a 12 th beam, N3 first reference signals in the N1 first reference signals correspond to the 11 th beam, N4 first reference signals in the N1 first reference signals except for the N3 first reference signals correspond to the 12 th beam, and N3 and N4 are both positive integers.

Wherein the N3 first reference signals occupy a first portion of the frequency domain resources of the fourth resource and the N4 first reference signals occupy a second portion of the frequency domain resources of the fourth resource. Alternatively, the first portion and the second portion are the same, or the first portion and the second portion are different. Wherein the first portion and the second portion are different is understood to mean that the first portion and the second portion are continuous or that a first frequency separation is comprised between the first portion and the second portion. I.e. the first and second portions may or may not overlap.

That is, the plurality of second beams are associated with the first reference signal, i.e., the second communication device can transmit the first reference signal using the 11 th beam and the 12 th beam. For example, when n3=n4=1, it is explained that one first reference signal is associated with one second beam.

Fig. 10 is a schematic structural diagram of a first reference signal and a second beam according to an embodiment of the present application. Wherein the abscissa represents time domain resources, e.g. with OFDM symbols as granularity, and the ordinate represents frequency domain resources, e.g. with REs or RBs as granularity. As shown in fig. 10, the left side represents resources occupying 4 OFDM symbols in the time domain, occupying 127 REs in the frequency domain, obtaining right side resources by truncation (or truncation), occupying 4 OFDM symbols in the time domain, and occupying 10 RBs in the frequency domain. That is, the second communication apparatus may transmit the first reference signal to the first communication apparatus using 4 OFDM symbols and 10 RBs on the right side in the drawing. Specifically, the second communication apparatus may transmit the first reference signal on the resource #1 (e.g., occupy 4 OFDM symbols in the time domain and 5 RBs in the frequency domain) using the second beam #1 (i.e., 11 th beam), and transmit the first reference signal on the resource #2 (e.g., occupy 4 OFDM symbols in the time domain and 5 RBs in the frequency domain) using the second beam #2 (i.e., 12 th beam). It follows that the frequency domain resource size of resource #1 and resource #2 is the same and the frequency domain resource locations do not overlap.

Fig. 11 is a schematic structural diagram of a first reference signal and a second beam according to an embodiment of the present application. Wherein the abscissa represents time domain resources, e.g. with OFDM symbols as granularity, and the ordinate represents frequency domain resources, e.g. with REs or RBs as granularity. As shown in fig. 11, 4 OFDM symbols are occupied in the time domain, and 10 or 20 RBs are occupied in the frequency domain. That is, the second communication apparatus may transmit the first reference signal to the first communication apparatus using 4 OFDM symbols and 10 RBs in the drawing. Specifically, the second communication device may transmit the first reference signal on resource #1 using the second beam #1 and transmit the first reference signal on resource #2 using the second beam # 2. It follows that the frequency domain resource size of resource #1 and resource #2 is the same and the frequency domain resource locations do not overlap. For example, resource #1 occupies 4 OFDM symbols in the time domain and 5 RBs in the frequency domain, resource #2 occupies 4 OFDM symbols in the time domain and 5 RBs in the frequency domain, and for another example, resource #1 occupies 4 OFDM symbols in the time domain and 10 RBs in the frequency domain, resource #2 occupies 4 OFDM symbols in the time domain and 10 RBs in the frequency domain, which is not limiting in this regard. Unlike fig. 10, the resources #1 and #2 in this implementation are staggered, also referred to as comb-like, where REs occupied by the same reference signal are discontinuous, or may be equally spaced.

In a second implementation manner, the M1 second beams include a 13 th beam and a 14 th beam, the 13 th beam and the 14 th beam correspond to the N1 first reference signals, the M3 seventh beams include a 15 th beam and a 16 th beam, the 15 th beam and the 16 th beam correspond to the N2 second reference signals, and N1, N2, M1 and M2 are all positive integers.

Wherein the N1 first reference signals occupy a first portion of frequency domain resources of the fourth resource and the N2 second reference signals occupy a second portion of frequency domain resources of the fourth resource. Alternatively, the first portion and the second portion are the same, or the first portion and the second portion are different. Wherein the first portion and the second portion are different is understood to mean that the first portion and the second portion are continuous or that a first frequency separation is comprised between the first portion and the second portion. I.e. the first and second portions may or may not overlap.

That is, the plurality of second beams correlate the first reference signal, i.e., the second communication device may transmit the first reference signal using the 13 th and 14 th beams, and the plurality of seventh beams correlate the second reference signal, i.e., the second communication device may transmit the second reference signal using the 15 th and 16 th beams. For example, when n1=n2=1, it is explained that one first reference signal is associated with a plurality of second beams, and one second reference signal is associated with a plurality of second beams.

Fig. 12 is a schematic structural diagram of a first reference signal, a second reference signal, and a second beam according to an embodiment of the present application. Wherein the abscissa represents time domain resources, e.g. with OFDM symbols as granularity, and the ordinate represents frequency domain resources, e.g. with REs or RBs as granularity. As shown in fig. 12, 4 OFDM symbols are occupied in the time domain, and 10 or 20 RBs are occupied in the frequency domain, i.e., the second communication device may transmit the first reference signal and the second reference signal to the first communication device using the 4 OFDM symbols and the 10 RBs in the figure. Specifically, the second communication device may transmit the first reference signal on resource #1 using the second beam #1 and the second beam #2 (i.e., the 13 th beam and the 14 th beam), and transmit the second reference signal on resource #2 using the second beam #3 and the second beam #4 (i.e., the 15 th beam and the 16 th beam). It follows that the frequency domain resource size of resource #1 and resource #2 is the same and the frequency domain resource locations do not overlap. For example, resource #1 occupies 4 OFDM symbols in the time domain and occupies 5 RBs in the frequency domain, resource #2 occupies 4 OFDM symbols in the time domain and occupies 5 RBs in the frequency domain, and for another example, resource #1 occupies 4 OFDM symbols in the time domain and occupies 10 RBs in the frequency domain, resource #2 occupies 4 OFDM symbols in the time domain and occupies 10 RBs in the frequency domain, i.e., each reference signal occupies 10 RBs, and the first reference signal or the second reference signal may be a reference signal obtained by truncating an existing PSS signal or SSS signal, for example, PSS signal or SSS signal occupies 127 REs (i.e., 10 rbs+7 REs), which may be obtained by truncating 7 REs of the head or tail of PSS signal or SSS signal, which is not limited by the present application.

Alternatively, the frequency domain resources occupied by the first reference signal and the second reference signal may be contiguous, or the frequency domain resources occupied by the first reference signal and the second reference signal may be comb-shaped, where REs occupied by the same reference signal are discontinuous and may be equally spaced, which is not limited in the present application.

S520, the first communication device measures signal strengths of the first synchronization signal and the N1 first reference signals to obtain a first measurement result.

In the present application, the signal strength may be represented by a power measurement, where the power parameter corresponding to the power measurement includes one or more of reference signal received power (REFERENCE SIGNAL RECEIVED power, RSRP), reference signal received quality (REFERENCE SIGNAL RECEIVED quality, RSRQ), and received signal strength indication (RECEIVED SIGNAL STRENGTH indication (RSSI), or signal-to-noise ratio (SNR).

The first communication device may measure RSRP of the first reference signal to determine the reception quality of the first reference signal, and may determine an optimal transmit-receive beam on the network device side and an optimal transmit-receive beam on the terminal device side according to the SSS signal in the first synchronization signal and the RSRP measurement value of the first reference signal. RACH resources (e.g., ROs and preambles) are then selected based on the selected optimal transmit-receive beam, and the beam selection result is transmitted to the second communication device in the RACH resources. Accordingly, the second communication device can communicate with the first communication device based on the selected optimal beam.

In a first example, the network device side transmits the first synchronization signal using two first beams (abbreviated SSB beams, e.g., SSB beam 1 and SSB beam 2), each SSB beam being associated with two second beams (e.g., reference signal beam 1, reference signal beam 2, reference signal beam 3, and reference signal beam 4), e.g., SSB beam 1 being associated with reference signal beam 1, reference signal beam 2, SSB beam 2 being associated with reference signal beam 3, reference signal beam 4. The terminal device side has two beams, for example, UE beam 1 and UE beam 2 (i.e., the fourth beam is one of UE beam 1 and UE beam 2), i.e., the terminal device can receive SSB using either UE beam 1 or UE beam 2. Wherein, the preamble set or the RO set corresponding to each SSB is divided into three non-overlapping subsets, corresponding to the SSB and the two reference signals respectively. For example, SSB beam 1 is used to transmit SSB1, three non-overlapping subsets are in one-to-one correspondence with SSB beam 1, reference signal beam 1, and reference signal beam 2, and for another example SSB beam 2 is used to transmit SSB2, three non-overlapping subsets are in one-to-one correspondence with SSB beam 2, reference signal beam 3, and reference signal beam 4, comprising the steps of:

The network device may transmit two SSBs (SSB 1 and SSB 2) using two SSB beams (SSB beam 1 and SSB beam 2), respectively, and transmit reference signals using four reference signal beams (reference signal beam 1, reference signal beam 2, reference signal beam 3, and reference signal beam 4);

S2: the terminal device may receive the two SSBs (SSB 1 and SSB 2) and the corresponding reference signals using the two beams (UE beam 1 and UE beam 2), respectively, and then measure the beam intensities of the SSB1 and SSB2 and the corresponding reference signals thereof, for example RSRP, so as to obtain 2×2+2×2=12 measurement results, and select an appropriate beam pair (may be referred to as an optimal beam pair) from the 12 beam pairs by comparing the measurement results, where the optimal beam pair includes a terminal device side beam and a network device side beam, for example, UE beam 1 and SSB beam 1, or UE beam 2 and reference signal beam 3;

And S3, the terminal equipment can select corresponding RACH resources (such as RO and/or preamble) according to the determined network equipment side beam, and send the preamble to the network equipment on the RACH resources to finish random access. Correspondingly, the network equipment determines a network equipment side beam selected by the terminal equipment based on the RACH resource selected by the terminal equipment or the time-frequency position of the preamble;

And S4, the network equipment communicates with the terminal equipment by utilizing the network equipment side beam selected by the terminal equipment.

In a second example, the network device side transmits the first synchronization signal using two first beams (abbreviated SSB beams, e.g., SSB beam 1 and SSB beam 2), each SSB beam being associated with two second beams (e.g., reference signal beam 1, reference signal beam 2, reference signal beam 3, and reference signal beam 4), e.g., SSB beam 1 being associated with reference signal beam 1, reference signal beam 2, SSB beam 2 being associated with reference signal beam 3, reference signal beam 4. The terminal device side has two beams, for example, UE beam 1 and UE beam 2 (i.e., the fourth beam is one of UE beam 1 and UE beam 2), i.e., the terminal device can receive SSB using either UE beam 1 or UE beam 2. Wherein, the preamble set or the RO set corresponding to each SSB is divided into 2 non-overlapping subsets, which respectively correspond to two reference signals. For example, SSB beam 1 is used to transmit SSB1, and then 2 non-overlapping subsets are in one-to-one correspondence with reference signal beam 1 and reference signal beam 2, and for another example SSB beam 2 is used to transmit SSB2, then 2 non-overlapping subsets are in one-to-one correspondence with reference signal beam 3 and reference signal beam 4, comprising the steps of:

The terminal equipment can respectively receive two SSB (SSB 1 and SSB 2) and corresponding reference signals by using two beams (UE beam 1 and UE beam 2), then, measuring the beam intensities of the SSB1 and the SSB2, such as RSRP, can obtain 4 measurement results, determining a selected SSB beam, measuring the reference signal beam intensity of the corresponding SSB, obtaining 2 x 2 = 4 measurement results, and selecting an appropriate beam pair (which can be called an optimal beam pair) from 4 beam pairs by comparing the measurement results, wherein the optimal beam pair comprises a terminal equipment side beam and a network equipment side beam, such as the UE beam 1 and the reference signal beam 1, or the UE beam 2 and the reference signal beam 3;

The first communication device determines a third beam from the first beam and the M1 second beams according to the first measurement result, and/or the first communication device determines a fourth beam from at least one beam used by the first communication device according to the first measurement result, S530.

The third beam is a receiving and transmitting beam of the second communication device when communicating with the first communication device, and the fourth beam is a receiving and transmitting beam of the first communication device when communicating with the second communication device. The first beam is a transmission beam of the first synchronization signal, the M1 second beams are transmission beams of N1 first reference signals, and M1 is a positive integer.

In other words, the third beam may be used as a beam on the network device side to transmit downlink data to the terminal device side, or may be used to receive uplink data from the terminal device side. The fourth beam may be used as a beam at the terminal device side, and may be used to transmit uplink data to the network device side or receive downlink data from the network device side. For ease of description, in the present application, the third beam may be referred to as an SSB beam, or a network device side beam, and the fourth beam may be referred to as a terminal device side beam.

It should be noted that, at least one beam used by the first communication apparatus may be predefined or preconfigured, or may be configured by signaling at the network device side. The at least one beam used by the first communication device may be a wide beam or a narrow beam, which is not limited in the present application.

Illustratively, M1 may be one of 1, 2, 3, 4, or 8.

Illustratively, M1 may be a multiple of 2, such as one of 2,4,6, or 8.

An implementation of determining the third beam for the first communication device is described below.

In a first implementation manner, the first communication device determines M2 fifth beams from the first beam and the M1 second beams according to the first measurement result, and selects one beam from the M2 fifth beams as the third beam, where the signal strength of the fifth beam is greater than or equal to a first threshold, the first threshold is preset, and M2 is a positive integer.

It should be noted that when m2=1, only one fifth beam having a signal strength greater than the first threshold is indicated, and the third beam is equivalent to the fifth beam, that is, the step of selecting one beam from M2 fifth beams as the third beam may be omitted, and when M2 is greater than 1, there are a plurality of fifth beams having a signal strength greater than the first threshold, that is, the first communication device may randomly select one beam from the plurality of fifth beams as the third beam, and the randomly selected one beam may be the largest signal strength of the M2 fifth beams, which is not limited in the present application.

Illustratively, the first threshold value satisfies { -156dBm to-31 dBm }, i.e., the first threshold value may be any one of-156 decibel milliwatts (decibel relative to one milliwatt, dBm) to-31 dBm. For example, the protocol predefines a correspondence between RSRP parameter configuration or index and a first threshold, where the RSRP parameter configuration or index takes values from 0 to 127. For example, when the value of the RSRP parameter configuration or index is 0, the value of the corresponding first threshold is-156 dBm, when the value of the RSRP parameter configuration or index is 127, the value of the corresponding first threshold is-31 dBm, and so on.

The number of the synchronization signal blocks is not limited in the present application, and other synchronization signal blocks may be alternatively transmitted between the first communication apparatus and the second communication apparatus in addition to the first synchronization signal block. I.e. the method 500 further comprises the following steps S501-S503 (not shown in the figures).

S501, the second communication device sends a second synchronization signal block to the first communication device.

Accordingly, the first communication device receives the second synchronization signal block from the second communication device.

The second synchronization signal block comprises second synchronization signals, the second synchronization signals are associated with N2 second reference signals, and N2 is a positive integer.

Alternatively, N2 may be an integer greater than or equal to 1, for example, 1,2,3, or 4, etc.

Alternatively, N2 may be a multiple of 2, such as one of 2, 4, 6 or 8.

In the application, the second synchronization signal is associated with N2 second reference signals, and the second synchronization signal can also comprise N2 second reference signals. That is, the second synchronization signal block may include the second synchronization signal and the second reference signal, or the second synchronization signal block may be composed of the second synchronization signal and the second reference signal. The structure of the second synchronization signal block, the structure of the second synchronization signal and the time-frequency resource of the second reference signal may refer to the related description of the structure of the first synchronization signal block, the structure of the time-frequency resource of the first synchronization signal and the structure of the first reference signal, which are not described herein again.

S502, the first communication device measures the signal strength of the second synchronization signal and the N2 second reference signals to obtain a second measurement result, and the specific implementation can refer to the related description of the step S520.

The first communication device determines a third beam from the sixth beam and the M3 seventh beams according to the second measurement result S503. The sixth beam is a transmission beam of the second synchronization signal, the M3 seventh beams are transmission beams of the N2 second reference signals, and M3 is a positive integer.

In a first implementation manner, the first communication device determines, according to the second measurement result, M4 eighth beams from the sixth beams and the M3 seventh beams, selects one beam from the M4 eighth beams and the M2 fifth beams as the third beam, the signal strength of the eighth beams is greater than or equal to a second threshold, the second threshold is preset, and M4 is a positive integer.

It should be understood that the specific implementation of the above step S503 may be regarded as further refinement of the above step S530, that is, in a case where the first communication device receives the multiple synchronization signal blocks (for example, the first synchronization signal block and the second synchronization signal block) from the second communication device, the first communication device may receive and measure the first synchronization signal block and the second synchronization signal block, and select, as the third beam, one beam from the multiple beams satisfying the condition (for example, the signal strength of the beam is greater than or equal to the first threshold value or the second threshold value) according to the measured first measurement result, or the first communication device may also receive and measure the first synchronization signal block according to the measured first measurement result, and select, as the third beam, one beam from the one or more beams satisfying the condition (for example, the signal strength of the beam is greater than or equal to the first threshold value), at this time, the first communication device may not receive and measure the second synchronization signal block.

In summary, the third beam may be the first beam transmitting the first synchronization signal, or the third beam may be one of the M1 second beams transmitting the N1 first reference signals, or the third beam may be the sixth beam transmitting the second synchronization signal, or the third beam may be one of the M3 seventh beams transmitting the N2 second reference signals.

Further, the first communication device may notify the second communication device using a different RACH resource after determining the third beam to enhance communication performance between the first communication device and the second communication device.

In one implementation, the first communication device sends indication information to the second communication device. Accordingly, the second communication device receives the indication information from the first communication device. Wherein the indication information is used for indicating the third beam. That is, the second communication device may determine the third beam according to the indication information, and then may use the third beam to perform data communication with the first communication device, which is beneficial to improving transmission performance.

Alternatively, the indication information may be carried on a physical random access channel PRACH.

Illustratively, the indication information includes a first preamble, and the third beam may be determined according to the first preamble and the first mapping relation.

The first mapping relationship is used for indicating a mapping relationship between a plurality of beams and a plurality of preambles, the plurality of beams comprises a plurality of beams in a first beam, M1 second beams, a sixth beam or M3 seventh beams, the plurality of preambles comprises a preamble corresponding to the first beam, a preamble corresponding to each second beam, a preamble corresponding to the sixth beam or a plurality of preambles in a preamble corresponding to each seventh beam, and the first preamble is one of the plurality of preambles. Accordingly, the second communication apparatus may determine a beam corresponding to the first preamble, i.e., a third beam, based on the received first preamble and the first mapping relation, and may then subsequently communicate with the first communication apparatus using the third beam.

Illustratively, the indication information includes a first RO, and the third beam may be determined according to the first RO and the second mapping relationship.

The second mapping relationship is used for indicating a mapping relationship between a plurality of beams and a plurality of ROs, wherein the plurality of beams includes a plurality of beams of a first beam, M1 second beams, a sixth beam, or M3 seventh beams, the plurality of ROs includes an RO corresponding to the first beam, an RO corresponding to each second beam, an RO corresponding to the sixth beam, or a plurality of ROs corresponding to each seventh beam, and the first RO is one of the plurality of ROs. Accordingly, the second communication apparatus may determine a beam corresponding to the first RO, i.e., a third beam, based on the received first RO and the second mapping relationship, and may then communicate with the first communication apparatus using the third beam.

It should be understood that the above first mapping relationship or the second mapping relationship may be predefined or preconfigured, or may be configured by the network device side through signaling, which is not limited by the present application. The pre-definition may include pre-definition, such as protocol definition, and the pre-configuration may be implemented by pre-storing corresponding codes, tables, or other manners that may be used to indicate relevant information in the device, and the present application is not limited to a specific implementation manner thereof.

Alternatively, the first mapping or the second mapping may exist in the form of a table, a function, text, or a string, such as a storage or a transmission.

Next, the first mapping relationship or the second mapping relationship is exemplified in the form of a table, wherein the first mapping relationship between the plurality of beams and the plurality of preambles is shown in table 1, and the second mapping relationship between the plurality of beams and the plurality of ROs is shown in table 2.

TABLE 1

Illustratively, when the indication information sent by the first communication device carries the preamble #2 (i.e., the first preamble), the indication information is used to indicate the second beam #1 (i.e., the third beam). Accordingly, the second communication device may determine the second beam #1 according to table 1 and the preamble #2, and then subsequently transmit downlink data to the first communication device using the second beam #1, and/or receive uplink data from the first communication device using the second beam # 1.

Alternatively, one or more rows in table 1 may be separately embodied in one table, for example, one or more rows in table 1 where the first beam and the second beam are located may be independently formed into a new table, and one or more rows in table 1 where the sixth beam and the seventh beam are located may be independently formed into a new table. Alternatively, one or more rows of the sixth beam and the seventh beam in table 1 may be omitted, that is, the number of synchronization signals transmitted by the second communication device to the first communication device is not limited in the present application.

It should be noted that, in the embodiment of the present application, the third beam may be one beam selected from one first beam and M1 second beams, alternatively, the third beam may be one beam selected from M1 second beams only, that is, the first beam not considering the first synchronization signal, and at this time, a line where the first beam in table 1 is located may be omitted, which is not limited to this embodiment of the present application.

TABLE 2

Beam	RO
		First wave beam	RO#1
Second beam #1	RO#2
		Second beam #2	RO#3
Sixth beam	RO#4
		Seventh beam #1	RO#5
Seventh beam #2	RO#6
		Seventh beam #3	RO#7

Illustratively, when the indication information sent by the first communication device carries ro#5 (i.e., the first RO), the indication information is described as indicating the seventh beam#1 (i.e., the third beam). Accordingly, the second communication device may determine the seventh beam #1 according to table 2 and RO #5, and then subsequently transmit downlink data to the first communication device using the seventh beam #1, and/or receive uplink data from the first communication device using the seventh beam # 1.

Alternatively, one or more rows in table 2 may be separately embodied in one table, for example, one or more rows in table 2 where the first beam and the second beam are located may be independently formed into a new table, and one or more rows in table 2 where the sixth beam and the seventh beam are located may be independently formed into a new table. Alternatively, one or more rows of the sixth beam and the seventh beam in table 1 may be omitted, that is, the number of synchronization signals transmitted by the second communication device to the first communication device is not limited in the present application.

The number of beams, the number of preambles, and the number of ROs in table 1 and table 2 of the present application are not limited.

It should be understood that the first mapping relationship between the plurality of beams and the plurality of preambles shown in table 1 and the second mapping relationship between the plurality of beams and the plurality of ROs shown in table 2 may be implemented independently or may be implemented in combination, that is, table 1 and table 2 may be combined into one table, which is not limited in this application. For example, for a particular beam, one or more rows in table 1 may be embodied in one table with the corresponding row or rows in table 2, such as the first mapping of the first 3 rows in table 1 and the second mapping of the first 3 rows in table 2 may be combined into one table, or the first mapping of the last 4 rows in table 1 and the second mapping of the last 4 rows in table 2 may be combined into one table, or all rows in table 1 and all rows in table 2 may be combined into one table.

It should also be understood that tables 1 and 2 above are examples given for ease of understanding only and should not constitute any limitation on the technical solutions of the present application.

Based on the above scheme, the first synchronization signal is associated with the first reference signal, so that the first communication device can determine the corresponding first reference signal after receiving the first synchronization signal, and by measuring RSRP measurement values of the first synchronization signal and the first reference signal, a beam with the highest (or higher) signal strength is selected as a transceiving beam (i.e., a third beam) on the second communication device side, in the msg1 sending stage in the random access process, by using different preambles or ROs to transmit measurement results (i.e., an indication third beam) obtained by measuring the first beam and the second beam by the first communication device to the second communication device, the second communication device can use the third beam to communicate with the terminal device, so that higher beam gain is obtained in subsequent communication, i.e., channel transmission quality is improved, and thus, the random access performance and transmission performance between the first communication device and the second communication device are also improved due to the improvement of the channel quality (e.g., the communication performance of msg2, msg3, msg4, msg5 is improved). And/or, the first communication device may determine the corresponding first reference signal after receiving the first synchronization signal, and by measuring the signal strengths of the first synchronization signal and the first reference signal, select a receiving beam used by the first communication device with the highest (or higher) signal strength as a receiving-transmitting beam (i.e., a fourth beam) of a subsequent first communication device side, and in the random access process, may transmit a preamble by using the fourth beam selected by the first communication device, thereby acquiring a higher beam gain in the subsequent communication, that is, improving the channel transmission quality, so that the random access performance and the transmission performance between the first communication device and the second communication device are also improved due to the improvement of the channel quality.

The communication method-side embodiment of the present application is described in detail above with reference to fig. 1 to 12, and the communication apparatus-side embodiment of the present application will be described in detail below with reference to fig. 13 and 14. It is to be understood that the description of the device embodiments corresponds to the description of the method embodiments, and that parts not described in detail can therefore be seen in the preceding method embodiments.

Fig. 13 is a schematic diagram of a communication device according to an embodiment of the present application. As shown in fig. 13, the communication apparatus 1300 includes a processing module 1310 and a communication module 1320. The communication apparatus 1300 may be a first communication apparatus, which may be a terminal device, or may be a communication apparatus, such as a chip, a chip system, or a circuit, that is applied to or used in cooperation with the terminal device and that is capable of implementing a method executed by the terminal device, or the communication apparatus 1300 may be a second communication apparatus, which may be a network device, or may be a communication apparatus, such as a chip, a chip system, or a circuit, a DU, or a CU, that is applied to or used in cooperation with a network device and that is capable of implementing a method executed by the network device.

The communication module 1320 may also be referred to as a transceiver module, a transceiver unit, a transceiver device, or the like. The processing module 1310 may also be referred to as a processor, a processing board, a processing unit, a processing device, or the like. Alternatively, the communication module 1320 is configured to perform the transmitting operation and the receiving operation of the first communication device or the second communication device in the above method, a device for implementing a receiving function in the communication module 1320 may be regarded as a receiving unit, and a device for implementing a transmitting function in the communication module 1320 may be regarded as a transmitting unit, that is, the communication module 1320 includes a receiving unit and/or a transmitting unit. Optionally, the processing module 1310 is configured to implement a processing function of the first communication device or the second communication device in the above method.

Furthermore, it should be noted that the foregoing communication module and/or the processing module may be implemented by a virtual module, for example, the processing module may be implemented by a software functional unit or a virtual device, and the communication module may be implemented by a software functional unit or a virtual device. Or the processing module or the communication module may be implemented by physical means, for example if the means are implemented using chips/circuits (e.g. integrated circuits or logic circuits etc.). The communication module may be an input-output circuit and/or a communication interface, and perform input operation (corresponding to the foregoing receiving operation) and output operation (corresponding to the foregoing transmitting operation), and the processing module is an integrated processor or microprocessor or circuit (e.g., an integrated circuit or logic circuit, etc.).

The division of the modules in the present application is schematically shown, and is merely a logic function division, and there may be another division manner in actual implementation, and in addition, each functional module in each example of the present application may be integrated in one processor, or may exist separately and physically, or two or more modules may be integrated in one module. The integrated modules may be implemented in hardware or in software functional modules.

Fig. 14 is a schematic diagram of another communication device according to an embodiment of the present application. As shown in fig. 14, the communication device 1400 may alternatively be the aforementioned first communication device or second communication device, or a chip system or circuit for the aforementioned first communication device or second communication device. Alternatively, the chip system may be constituted by a chip in the present application, and may include a chip and other discrete devices. The first communication device may be a terminal device, and the second communication device may be a network device or the like.

The communications apparatus 1400 can be employed to implement functionality of any device (e.g., terminal device, network device) in the communications system described in the foregoing examples. The communication device 1400 may include at least one processing circuit 1410. The processing circuit 1410 is optionally coupled to a memory, which may be located within the apparatus, or the memory may be integrated with the processor, or the memory may be located outside the apparatus. For example, the communication device 1400 may also include at least one memory 1420. The memory 1420 stores computer programs, computer programs or instructions and/or data necessary to implement any of the examples described above, and the processing circuitry 1410 may execute the computer programs stored in the memory 1420 to perform the methods of any of the examples described above.

The communication apparatus 1400 may further include a transceiver circuit 1430, and the communication apparatus 1400 may perform information interaction with other devices through the transceiver circuit 1430. The transceiver circuit 1430 may be, for example, a transceiver, circuit, bus, module, pin, or other type of communication interface. When the communication device 1400 is a chip-type device or circuit, the transceiver circuit 1430 in the device 1400 may be an input/output circuit or an interface circuit, and may input information (or called receiving information) and output information (or called transmitting information). When the communication apparatus 1400 is a network device or a terminal device, the transceiver circuit 1430 may be a transmitter, a receiver, or a transceiver, or a communication interface, which is not limited herein.

Wherein the processing circuitry 1410 may be one or more processors or all or part of the processing circuitry in one or more processors. The processing circuit 1410 is an integrated processor, microprocessor, integrated circuit or logic circuit, etc., and the processor can determine output information based on input information.

The coupling in the present application is an indirect coupling or communication connection between devices, units or modules, which may be in electrical, mechanical or other form for the exchange of information between the devices, units or modules. The processing circuitry 1410 may operate in conjunction with the memory 1420 and the transceiver circuitry 1430. The specific connection medium between the processing circuit 1410, the memory 1420, and the transmitting/receiving circuit 1430 is not limited in the present application.

Optionally, as shown in fig. 14, the processing circuit 1410, the memory 1420, and the transceiver circuit 1430 are connected to each other through a bus 1440. Alternatively, the bus may comprise an address bus, a data bus, a control bus, or the like. Further, for ease of illustration, one bus 1440 is shown in FIG. 14, but not just one bus or one type of bus.

It is to be appreciated that the processors referred to in embodiments of the present application may be central processing units (central processing unit, CPU) or some circuitry for processing functions in other general purpose processors, digital Signal Processors (DSP), application Specific Integrated Circuits (ASIC), off-the-shelf programmable gate arrays (field programmable GATE ARRAY, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

It should also be understood that the memory referred to in embodiments of the present application may be volatile memory and/or nonvolatile memory. The nonvolatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an erasable programmable ROM (erasable PROM), an electrically erasable programmable EPROM (EEPROM), or a flash memory. The volatile memory may be random access memory (random access memory, RAM). For example, RAM may be used as an external cache. By way of example, and not limitation, RAM includes various forms of static random access memory (STATIC RAM, SRAM), dynamic random access memory (DYNAMIC RAM, DRAM), synchronous Dynamic Random Access Memory (SDRAM), double data rate synchronous dynamic random access memory (doubledata RATE SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (ENHANCED SDRAM, ESDRAM), synchronous link dynamic random access memory (SYNCHLINK DRAM, SLDRAM), and direct memory bus random access memory (direct rambus RAM, DR RAM).

It should be noted that when the processor is a general purpose processor, DSP, ASIC, FPGA or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, the memory (storage module) may be integrated into the processor.

It should also be noted that the memory described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

The embodiment of the present application also provides a computer-readable storage medium having stored thereon computer instructions for implementing the method performed by the first communication device or the second communication device in the above embodiment.

The embodiment of the application also provides a computer program product, which comprises computer program code or instructions which, when executed by a computer, realize the method executed by the first communication device or the second communication device in the embodiment.

The embodiment of the application also provides a communication system, which comprises the first communication device or the second communication device in the embodiment.

The explanation and advantageous effects of the relevant content in any of the above-provided devices are referred to the corresponding method embodiments provided above, and will not be described here.

In order to facilitate understanding of the above embodiments provided by the present application, the following description is made:

1) In the present application, if there is no special description or logic conflict, terms and/or descriptions between different embodiments have consistency and may mutually refer, and technical features in different embodiments may be combined to form new embodiments according to their inherent logic relationships.

2) In the present application, "at least one" means one or more, and "a plurality" means two or more. "and/or" describes an association of associated objects, meaning that there may be three relationships, e.g., A and/or B, and that there may be A alone, while A and B are present, and B alone, where A, B may be singular or plural. In the text description of the present application, the character "/" generally indicates that the front-rear associated object is an or relationship. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one of a, b and c may represent a, or b, or c, or a and b, or a and c, or b and c, or a, b and c. Wherein a, b and c can be single or multiple respectively.

3) In the present application, "first", "second", and various numerical numbers (e.g., #1, #2, etc.) indicate distinction for convenience of description, and are not intended to limit the scope of the embodiments of the present application. For example, distinguishing between different messages, etc. does not require a particular order or sequence of parts. It is to be understood that the objects so described may be interchanged where appropriate to enable description of aspects other than those of the embodiments of the application.

4) In the present application, the descriptions of "when..once.," in the case of..once..once..and "if" etc. all mean that the device will make a corresponding process in some objective case, it is not intended to limit the time, nor does it require that the device have to have a deterministic action in its implementation, nor does it imply that there are other limitations.

5) In the present application, "indicating" or "indicating" may include both for direct indication and for indirect indication. When describing that certain indication information is used for indicating A, the indication information may be included to directly indicate A or indirectly indicate A, and does not represent that the indication information is necessarily carried with A.

The indication manner related to the embodiment of the application is understood to cover various methods which can enable the party to be indicated to know the information to be indicated. The information to be indicated may be sent together as a whole or may be sent separately in a plurality of sub-information, and the transmission periods and/or transmission timings of the sub-information may be the same or different.

The "indication information" in the embodiments of the present application may be an explicit indication, that is, directly indicated by signaling, or obtained according to parameters indicated by signaling, in combination with other rules or in combination with other parameters, or by deduction. Or may be implicitly indicated, i.e. obtained according to rules or relationships, or according to other parameters, or derived. The present application is not particularly limited thereto.

6) In the present application, "protocol" may refer to a standard protocol in the field of communication, and may include, for example, a 5G protocol, an NR protocol, and related protocols applied to a future communication system, which is not limited in the present application. "predefined" may include predefined. For example, a protocol definition. "preconfiguration" may be implemented by pre-storing corresponding codes, tables, or other means in the device that may be used to indicate relevant information, for example, without limitation to the implementation of the present application.

7) In the present application, "communication" may also be described as "data transmission", "information transmission", "data processing", and the like. "transmission" includes "sending" and "receiving".

8) In the present application, "sending information to XX (device)" is understood to mean that the destination of the information is the device. May include directly or indirectly transmitting information to the device. "receiving information from XX (device), or receiving information from XX (device)" may be understood that the source of the information is the device and may include receiving information directly or indirectly from the device. The information may be subjected to necessary processing, such as format change, etc., between the source and destination of the information transmission, but the destination can understand the valid information from the source.

In various embodiments of the present application, the sequence number of each process does not mean the sequence of execution, and the execution sequence of each process should be determined by its functions and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

In the present application, examples may refer to each other, for example, methods and/or terms between method embodiments may refer to each other, for example, functions and/or terms between apparatus examples and method examples may refer to each other, without logical contradiction.

It should be understood that in some of the foregoing embodiments, the device in the existing network architecture is mainly used as an example for illustration, and the embodiments of the present application are not limited to the specific form of the device. For example, devices that can achieve the same functions in the future are applicable to the embodiments of the present application.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It will be apparent to those skilled in the art that for convenience and brevity of description, the specific operation of the systems, apparatus and units described above may refer to the corresponding processes in the foregoing method embodiments, which are not described herein.

In the several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in the embodiments of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present application. The storage medium includes various media capable of storing program codes such as a U disk, a mobile hard disk, a ROM, a RAM, a magnetic disk or an optical disk.

The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method of communication, comprising:

Receiving a first synchronization signal block, wherein the first synchronization signal block comprises first synchronization signals, the first synchronization signals are associated with N1 first reference signals, and N1 is a positive integer;

measuring the signal strengths of the first synchronous signal and the N1 first reference signals to obtain a first measurement result;

Determining a third beam from a first beam and M1 second beams according to the first measurement result, wherein the third beam is a receiving and transmitting beam of a second communication device when communicating with the first communication device, the first beam is a transmitting beam of the first synchronous signal, the M1 second beams are transmitting beams of the N1 first reference signals, and M1 is a positive integer;

And/or the number of the groups of groups,

And determining a fourth beam from at least one beam used by the first communication device according to the first measurement result, wherein the fourth beam is a receiving and transmitting beam of the first communication device when communicating with the second communication device.

2. The method of claim 1, wherein the first synchronization signal is associated with N1 first reference signals, and wherein the first synchronization signal block further comprises the N1 first reference signals.

3. The method according to claim 1 or 2, wherein said determining a third beam from the first beam and the M1 second beams based on the first measurement result comprises:

And determining M2 fifth beams from the first beam and the M1 second beams according to the first measurement result, selecting one beam from the M2 fifth beams as the third beam, wherein the signal intensity of the fifth beams is greater than or equal to a first threshold, the first threshold is preset, and M2 is a positive integer.

4. A method according to any one of claims 1 to 3, further comprising:

receiving a second synchronization signal block, wherein the second synchronization signal block comprises a second synchronization signal, the second synchronization signal is associated with N2 second reference signals, and N2 is a positive integer;

Measuring the signal strengths of the second synchronous signal and the N2 second reference signals to obtain a second measurement result;

And determining the third beam from a sixth beam and M3 seventh beams according to the second measurement result, wherein the sixth beam is a transmission beam of the second synchronization signal, the M3 seventh beams are transmission beams of the N2 second reference signals, and M3 is a positive integer.

5. The method of claim 4, wherein the second synchronization signal is associated with N2 second reference signals, and wherein the second synchronization signal block further comprises the N2 second reference signals.

6. The method according to claim 4 or 5, wherein said determining the third beam from the sixth beam and the M3 seventh beams according to the second measurement result comprises:

And determining M4 eighth beams from the sixth beams and the M3 seventh beams according to the second measurement result, selecting one beam from the M4 eighth beams and the M2 fifth beams as the third beam, wherein the signal strength of the eighth beams is greater than or equal to a second threshold, the second threshold is preset, and M4 is a positive integer.

7. The method according to any of claims 4 to 6, wherein the third beam is the first beam, or the third beam is one of the M1 second beams, or the third beam is the sixth beam, or the third beam is one of the M3 seventh beams.

8. The method according to any one of claims 1 to 7, further comprising:

And sending indication information to the second communication device, wherein the indication information indicates the third beam.

9. The method of claim 8, wherein the indication information comprises a first preamble, and wherein the third beam is determined according to the first preamble and a first mapping relationship;

The first mapping relationship is used for indicating a mapping relationship between a plurality of beams and a plurality of preambles, the plurality of beams comprises a plurality of beams in the first beam, the M1 second beams, the sixth beams or the M3 seventh beams, the plurality of preambles comprises a preamble corresponding to the first beam, a preamble corresponding to each second beam, a preamble corresponding to the sixth beam or a plurality of preambles corresponding to each seventh beam, and the first preamble is one of the plurality of preambles.

10. The method according to claim 8 or 9, wherein the indication information comprises a first random access channel occasion, RO, and the third beam is determined according to the first RO and a second mapping relationship;

the second mapping relationship is used for indicating a mapping relationship between a plurality of beams and a plurality of ROs, the plurality of beams includes a first beam, the M1 second beams, the sixth beams, or a plurality of beams in the M3 seventh beams, the plurality of ROs includes an RO corresponding to the first beam, an RO corresponding to each of the second beams, an RO corresponding to the sixth beams, or a plurality of ROs corresponding to each of the seventh beams, and the first RO is one of the plurality of ROs.

11. The method according to any one of claims 1 to 10, wherein the first beam is different from at least one of the M1 second beams.

12. The method according to any one of claims 1 to 11, wherein one or more of the N1 first reference signals corresponds to one of the M1 second beams.

13. The method according to any one of claims 1 to 12, wherein the M1 second beams include a ninth beam and a tenth beam, the ninth beam being used for transmitting N3 first reference signals of the N1 first reference signals, the tenth beam being used for transmitting N4 first reference signals of the N1 first reference signals other than the N3 first reference signals, the N3 first reference signals occupy first resources, the N4 first reference signals occupy second resources, the first resources or the second resources include at least one orthogonal frequency division multiplexing OFDM symbol, and N3 and N4 are both positive integers.

14. The method of claim 13, wherein the frequency domain resources of the first resource and the frequency domain resources of the second resource are not identical.

15. The method according to any of claims 1 to 14, wherein the first synchronization signal occupies a third resource, the N1 first reference signals occupy a fourth resource, and frequency domain resources of the third resource and frequency domain resources of the fourth resource do not overlap at all.

16. The method of claim 15, wherein the step of determining the position of the probe is performed,

The time domain resource of the fourth resource is located after the time domain resource unit of the third resource, or

The time domain resource of the fourth resource is the same as the time domain resource of the third resource, or

The time domain resource of the third resource is contained in the time domain resource of the fourth resource, or

The time domain resource of the fourth resource is included in the time domain resource of the third resource, or

A first time unit occupied by a first synchronization signal set and a second time unit occupied by a first reference signal set, the first synchronization signal being included in the first synchronization signal set, the first reference signal being included in the first reference signal set, or

The first synchronization signal set occupies a third time unit, the first reference signal set occupies a fourth time unit, the first synchronization signal is included in the first synchronization signal set, the first reference signal is included in the first reference signal set, and the third time unit and the fourth time unit are both 5ms.

17. The method according to claim 15 or 16, wherein,

The M1 second beams comprise an 11 th beam and a 12 th beam, N3 first reference signals in the N1 first reference signals correspond to the 11 th beam, N4 first reference signals in the N1 first reference signals except the N3 first reference signals correspond to the 12 th beam, and N3 and N4 are positive integers.

18. The method according to claim 15 or 16, wherein,

The M1 second beams comprise a 13 th beam and a 14 th beam, and the 13 th beam and the 14 th beam correspond to the N1 first reference signals;

The M3 seventh beams comprise a 15 th beam and a 16 th beam, and the 15 th beam and the 16 th beam correspond to the N2 second reference signals;

Wherein the N1 first reference signals occupy a first portion of frequency domain resources of the fourth resource, and the N2 second reference signals occupy a second portion of frequency domain resources of the fourth resource.

19. The method according to any one of claims 4 to 18, characterized in that the N1 first reference signals or the N2 second reference signals are used to carry a first sequence comprising any one of ZC sequences, m sequences or gold sequences;

Wherein the length of the first sequence is any one of 240, 120, 60, 40 or 30 resource elements RE.

20. A method of communication, comprising:

Transmitting a first synchronization signal block, wherein the first synchronization signal block comprises first synchronization signals, the first synchronization signals are associated with N1 first reference signals, the first synchronization signals and the N1 first reference signals are used for determining a first measurement result, and N1 is a positive integer;

The first measurement result is used for determining a third beam from a first beam and M1 second beams, the third beam is a receiving and transmitting beam of a second communication device when the third beam is communicated with a first communication device, the first beam is a transmitting beam of the first synchronous signal, the M1 second beams are transmitting beams of the N1 first reference signals, and M1 is a positive integer;

And/or the number of the groups of groups,

The first measurement result is used for determining a fourth beam from at least one beam used by the first communication device, wherein the fourth beam is a transceiving beam of the first communication device when the fourth beam is communicated with the second communication device.

21. The method of claim 20, wherein the first synchronization signal is associated with N1 first reference signals, and wherein the first synchronization signal block further comprises the N1 first reference signals.

22. The method of claim 21, wherein the third beam is the first beam or the third beam is one of the M1 second beams.

23. The method according to claim 21 or 22, characterized in that the method further comprises:

indication information from the first communication device is received, the indication information indicating the third beam.

24. The method of claim 23, wherein the indication information comprises a first preamble, and wherein the third beam is determined according to the first preamble and a first mapping relationship;

The first mapping relationship is used for indicating a mapping relationship between a plurality of beams and a plurality of preambles, the plurality of beams comprise a plurality of beams in the first beam and the M1 second beams, the plurality of preambles comprise a preamble corresponding to the first beam and a plurality of preambles in the preambles corresponding to each second beam, and the first preamble is one of the plurality of preambles.

25. The method of any one of claims 21 to 24, wherein the first beam is different from at least one of the M1 second beams.

26. The method according to any one of claims 21 to 25, wherein one or more of the N1 first reference signals corresponds to one of the M1 second beams.

27. A communication device, characterized in that it is a first communication device for implementing the method according to any of claims 1-19.

28. The communication apparatus of claim 27, wherein the first communication apparatus comprises any one of a terminal device or a chip.

29. A communication device, characterized in that the communication device is a second communication device for implementing the method according to any of claims 20-25.

30. The communication apparatus according to claim 28, wherein the second communication apparatus comprises any one of a network device, a chip, a central unit CU or a distributed unit DU.