CN108811074B

CN108811074B - Information transmission method and device

Info

Publication number: CN108811074B
Application number: CN201710314187.6A
Authority: CN
Inventors: 任海豹
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2017-05-05
Filing date: 2017-05-05
Publication date: 2021-01-29
Anticipated expiration: 2037-05-05
Also published as: CN108811074A

Abstract

Embodiments of the present invention provide an information transmission method and apparatus. In the information transmission method, a network device configures a first format of a first scheduling time unit, and sends indication information of the first format adopted by the first scheduling time unit. By implementing the embodiment of the present invention, the network device can dynamically configure the format of the first scheduling time unit, so as to avoid interference between symbols. In addition, the dynamic configuration format can expand the range of user equipments that can perform cooperative transmission. For example, not only can the user equipments located at the service edge of each cooperative transmission base station be able to use the cooperative transmission mode, but also the user equipment located at the service center of each base station can use the cooperative transmission mode. The cooperative transmission method is used, thereby increasing the system capacity.

Description

Information transmission method and device

Technical Field

The present invention relates to the field of communications technologies, and in particular, to an information transmission method and apparatus.

Background

In the wireless communication technology, the network capacity is improved by the cooperative transmission of a plurality of base stations, and especially when the network is under medium and low load, the throughput of the user equipment can be improved by jointly serving the user equipment by the plurality of base stations. Because different base stations have different positions from User Equipment (UE), propagation times of signals sent to the same UE to the UE may be different, and are recorded as air interface propagation time differences; in addition, since different base stations use independent clocks, the time of simultaneous transmission by different base stations also has a certain deviation, and is recorded as the timing difference between base stations. For the same UE, if the sum of timing difference between two base stations in cooperative transmission, propagation time difference of an air interface reaching the UE, and multipath delay is greater than the length of Cyclic Prefix (CP)/Zero-inserted prefix (ZP), interference between symbols may be caused, orthogonality of Orthogonal Frequency Division Multiplexing (OFDM) is destroyed, and demodulation performance is reduced.

Disclosure of Invention

The embodiment of the invention provides an information transmission method and an information transmission device, which enable the time difference of signals sent by a plurality of base stations to reach user equipment to be within the length range of CP or ZP through a dynamic configuration format.

In a first aspect, an embodiment of the present invention provides an information transmission method, where in the information transmission method, a network device configures a first format of a first scheduling time unit, and sends indication information of the first format adopted by the first scheduling time unit. The network device may be a serving base station or a cooperative base station. In addition, besides configuring the first format, the network device may further adjust the transmission time of the serving base station and the cooperative base station, so that a time difference between signals transmitted by the serving base station and the cooperative base station and reaching the user equipment is zero, or the time difference is not greater than the length of the CP or the ZP. Therefore, by implementing the embodiment of the invention, the network equipment can dynamically configure the format of the first scheduling time unit, thereby avoiding the interference between symbols. In addition, the dynamic configuration format can expand the range of the user equipment capable of performing cooperative transmission, for example, the dynamic configuration format can be suitable for not only the user equipment at the edge of the base station service of each cooperative transmission to use the cooperative transmission mode, but also the user equipment at the service center of each base station to use the cooperative transmission mode, thereby improving the system capacity.

In a second aspect, an embodiment of the present invention further provides another information transmission method, where in the information transmission method, a user equipment may receive indication information in a first format used by a first scheduling time unit; and determining the first format of the first scheduling time unit according to the indication information of the first format. Optionally, the information transmission method may further include: and the user equipment receives the indication information of the sampling starting time in the first format.

Therefore, by implementing the embodiment of the present invention, the user equipment can determine the first format of the first scheduling time unit according to the indication information of the first format, so that the demodulated data is more accurate, that is, the interference between different symbols is avoided.

Optionally, a symbol set included in the first format and used for carrying the demodulation reference signal partially overlap or completely overlap with a symbol set included in the second format and used for carrying the demodulation reference signal, where the second format corresponds to a first scheduling time unit of another network device, or a second scheduling time unit of the network device, where the second scheduling time unit has the same granularity as that of the first scheduling time unit but different numbers; the time length of the first format is smaller than the time length of the second format. For example, when the scheduled time unit is a subframe, the frame number of the first scheduled time may be different from the frame number of the second scheduled time unit. Since the first format is a short frame, the transmission time of each base station in cooperative transmission can be adjusted, so that the time difference of the signals transmitted by each base station reaching the user equipment is within the range of CP or ZP.

Optionally, the indication information in the first format may be carried in a higher layer signaling or a physical layer signaling, and in addition, the higher layer signaling or the physical layer signaling may be a user equipment level message or a user equipment group level message. For example, when the examples between the ue are closer, a cooperative transmission mode may be configured for a group of ues, and at this time, the higher layer signaling or the physical layer signaling may be unified into a combination of the configuration formats of the group of ues.

Optionally, the high layer signaling or the physical layer signaling further carries quasi co-located QCL information corresponding to the first format, where the QCL information indicates that an antenna port group currently used and an antenna port of a corresponding resource group satisfy a QCL relationship. The quasi-co-location information of the antenna ports means that signals sent from the quasi-co-location antenna ports can undergo the same large-scale fading, and the large-scale fading includes delay spread, doppler shift, average channel gain, average delay, channel space characteristics and the like. Therefore, the QCL relationship between the currently used antenna port group and the resource information of the corresponding group is indicated by the quasi-co-location information, so that the user equipment can be assisted to jointly perform channel estimation and signal demodulation by combining the DMRS sent by the currently used antenna port and the resource information of the corresponding group, and the demodulation performance is improved.

Optionally, the number of symbols included in the first format is n less than the number of symbols included in the second format, and n is an integer greater than or equal to 1. It can also be said that the first format is that the first n symbols are blank symbols, or the last n symbols are blank symbols, where a blank symbol means that the symbol is not subjected to resource mapping. Wherein n is typically 1.

Optionally, the subcarrier spacing of the head symbol or the tail symbol in the first format is m times of the subcarrier spacing of the remaining symbols in the first format, and m is a rational number greater than 1. For example, the remaining symbols or the remaining symbols of the first format have a subcarrier spacing of Δ f_kThen the subcarrier spacing of the leading or trailing symbol may be m x Δ f_k。

Correspondingly, the indication information of the first format may include subcarrier spacing information of a head symbol or a tail symbol in the first format adopted by the first scheduling unit, and the subcarrier spacing information may include a value of m, or an indication of the value of m, and the like, for indicating the subcarrier spacing of the head symbol or the tail symbol.

Optionally, the indication information of the first format includes an indication value corresponding to a first format or a format group adopted by the first scheduling time unit, where the format group includes the first format and a second format; the indication value is used for indicating one format or one format group in selectable formats or format groups configured by the higher layer signaling or the physical layer signaling. Wherein the format group comprises formats of at least two base stations in a first scheduling time unit.

Optionally, the indication information in the first format includes a starting symbol position and a symbol number included in the first format adopted by the first scheduling unit; or the indication information of the first format includes a starting symbol position and a symbol number included in each format in a format group adopted by the first scheduling unit, where the format group includes the first format and a second format, and the second format corresponds to a first scheduling time unit of another network device, or a second scheduling time unit of the network device, and the granularity of the second scheduling time unit is the same as that of the first scheduling time unit, but the number of the second scheduling time unit is different from that of the first scheduling time unit.

In the embodiment of the present invention, after the network device configures the first format, it is further required to adjust the sending time of the first base station and the second base station, and therefore, it is required to additionally send the indication information of the sampling start time of the first format. For example, the indication information of the sampling start time includes at least one adjustment amount of the sampling start time and an indication value of one of the at least one adjustment amount; the at least one adjustment of the sampling start time is carried in the higher layer signaling; an indication of one of the at least one adjustment amount is carried in the physical layer signaling. Optionally, the sampling start time may also be set in a manner predefined by the system.

Optionally, the indication information of the sampling start time may be indicated by introducing an additional indication field through the RRC or the MAC CE, for example, indicating a received sampling time adjustment amount, and indicating that the adjustment amount is effective through the DCI.

Optionally, the indication information of the sampling start time may also configure multiple groups of sampling time adjustment amounts through RRC or MAC CE, and then indicate which group is the actually received sampling adjustment amount through DCI; or configuring a sampling adjustment amount through RRC/MAC CE and indicating whether to take effect through DCI.

Optionally, the sampling start time may use a QCL indication, the UE may be configured by RRC to receive data transmitted from antenna ports of multiple sets of QCLs, and the UE may be indicated by DCI which set of QCL parameters is used by the UE (in this case, the first base station and the second base station use the same subframe format), or which sets of QCL parameters (in this case, the first base station and the second base station use different subframe formats) correspond to a timing as a reception timing of the first scheduling time unit, where the reception timing includes PDSCH-start information and/or data symbol length information included in the PDSCH;

alternatively, the sampling start point may be set by a default manner, for example, setting a reception timing as the sampling start point, such as (a) receiving the scheduled subframe with reference to a reception timing corresponding to a TRP of a first arriving signal, or (b) receiving the scheduled subframe with reference to a reception timing corresponding to a TRP of a later arriving signal, or (c) receiving the scheduled subframe with reference to a reception timing corresponding to a first TRP, or (d) receiving the scheduled subframe with reference to a reception timing corresponding to a second TRP.

Optionally, the sampling start point may also be set by a synchronized pilot, for example, an additional pilot, such as a full-bandwidth pilot, is inserted into the subframe for performing accurate time-frequency synchronization, the full-bandwidth pilot is similar to a CSI-RS or MRS, and when a special subframe is configured by RRC or MACCE, the pilot for synchronization is indicated or default to be sent in the subframe at the same time.

In a third aspect, an embodiment of the present invention further provides an information transmission apparatus, where the information transmission apparatus has a function of implementing the information transmission method according to the first aspect or the second aspect. The above functions may be implemented by hardware, or may be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the functions described above. For example, the information transmission apparatus may include a configuration module and a sending module, wherein the configuration module is configured to configure a first format of a first scheduling time unit; the sending module is configured to send the indication information of the first format used by the first scheduling time unit. Optionally, the information transmission apparatus may include a receiving module and a determining module, where the receiving module is configured to receive indication information of a first format used by a first scheduling time unit, and the determining module determines the first format of the first scheduling time unit according to the indication information of the first format.

In a fourth aspect, an embodiment of the present invention further provides an information transmission device, where the information transmission device may include a processor, a memory, and a communication interface, where the processor is connected to the communication interface and the memory, respectively; the memory is to store program instructions; the processor is configured to call the program instructions in the memory, so that the apparatus implements the information transmission method according to any one of the above aspects of the embodiment of the present invention.

In a fifth aspect, the embodiment of the present invention further provides a computer-readable storage medium, where instructions are stored, and when the computer-readable storage medium runs on a computer, the information transmission method in any one of the above aspects can be implemented.

In a sixth aspect, an embodiment of the present invention further provides a computer program product, where instructions in the computer program product, when executed by a processor, may implement the information transmission method of the first aspect or the second aspect.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments or the background art of the present invention, the drawings required to be used in the embodiments or the background art of the present invention will be described below.

Fig. 1 is a schematic diagram of a cooperative transmission scenario provided in an embodiment of the present invention;

FIG. 2 is a schematic diagram of a symbol according to an embodiment of the present invention;

fig. 3a is a schematic diagram of a time difference between arrival times of signals transmitted by a first base station and a second base station at a user equipment according to an embodiment of the present invention;

fig. 3b is a schematic diagram of a time difference between arrival times of signals transmitted by the first base station and the second base station at the user equipment according to another embodiment of the present invention;

FIG. 4 is a diagram of a first format provided by an embodiment of the present invention;

FIG. 5a is a diagram illustrating another format provided by an embodiment of the present invention;

FIG. 5b is a diagram of another format provided by an embodiment of the invention

FIG. 6 is a schematic diagram of yet another format provided by an embodiment of the invention;

FIG. 7 is a schematic diagram of yet another format provided by an embodiment of the invention;

fig. 8 is a flowchart illustrating an information transmission method according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a transmission device according to an embodiment of the present invention

Fig. 10 is a flowchart illustrating another information transmission method according to an embodiment of the present invention;

FIG. 11 is a first schematic diagram of an apparatus provided in an embodiment of the present application;

fig. 12 is a schematic structural diagram of a user equipment provided in the present application;

FIG. 13 is a second schematic diagram of an apparatus provided by an embodiment of the present application;

fig. 14 is a schematic structural diagram of a network device according to an embodiment of the present application.

Detailed Description

The embodiments of the present invention will be described below with reference to the drawings.

References to "first", "second", etc. in this application are used to distinguish between different objects and not to describe a particular order. Furthermore, the terms "comprises" and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or modules is not limited to the listed steps or modules but may alternatively include other steps or modules not listed or inherent to such process, method, article, or apparatus.

It should be understood that the technical solution of the present application can be specifically applied to various communication systems, for example: the technical solution of The present application may also be used in future networks, such as a Fifth Generation Mobile Communication Technology (5G) System, and may also be called a New antenna (New rad, NR) System, an end-to-end (device to Mobile Communication) System, a 85mobile Communication (85d 2, 852, 3583) machine to machine (M) System, and so on, along with The continuous development of Communication technologies.

The communication involved in the embodiments of the present invention may be between a base station and a terminal, or between a base station and a base station, such as between a macro base station and a small base station, or between a terminal and a terminal, such as in a D2D network. The embodiment of the application takes communication between a base station and user equipment as an example.

In this application, the user equipment may refer to a wireless terminal and a wired terminal. The wireless terminal may refer to a device that provides voice and/or data connectivity to a user, a handheld device having wireless connection capability, or other processing device connected to a wireless modem that may communicate with one or more core networks via a Radio Access Network (RAN). For example, the user equipment may be a mobile terminal, such as a mobile phone (or referred to as a "cellular" phone) and a computer having a mobile terminal, and may also be a portable, pocket, hand-held, computer-embedded, or vehicle-mounted mobile device, such as a Personal Communication Service (PCS) phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), and the like, which exchange language and/or data with a radio access network. Optionally, the User equipment may also be referred to as a Mobile Station (MS), a Mobile Terminal (Mobile Terminal), a Subscriber Unit (SU), a Subscriber Station (SS), a Mobile Station (MB), a Remote Station (Remote Station, RS), an Access Point (Access Point, AP), a Remote Terminal (Remote Terminal, RT), an Access Terminal (AT), a User Terminal (User Terminal, UT), a User Agent (UA), a Terminal equipment (User Device, UD), and the like, which are not limited in this application.

In this application, the network device may include a base station, a Transmission Reception Point (TRP), or a Radio Remote Unit (RRU). A base station may refer to a device in an access network that communicates over the air-interface, through one or more sectors, with terminals and that may coordinate management of attributes for the air-interface. For example, the base station may be a base transceiver station in GSM or CDMA, such as a Base Transceiver Station (BTS), a base station in WCDMA, such as a NodeB, an evolved Node b in LTE, such as an eNB or an e-NodeB (evolved Node b), a base station in a 5G system, or a base station in a future network, and the like, and the present application is not limited thereto. Optionally, the base station may also be a relay device, or other network element devices with a function of a base station.

In this application, a scheduling Time unit may include an integer number of symbols in a Time domain, for example, the scheduling Time unit may refer to a subframe, may also refer to a slot, may also refer to a radio frame, a micro slot (mini slot or sub slot), a plurality of aggregated slots, a plurality of aggregated subframes, a symbol, and the like, and may also refer to a Transmission Time Interval (TTI). For example, a scheduling time unit may include an integer number of another scheduling time unit in a time domain, or a duration of a scheduling time unit in a time domain is equal to a duration of an integer number of another scheduling time unit in a time domain, for example, a micro slot/time slot/subframe/radio frame includes an integer number of symbols, a time slot/subframe/radio frame includes an integer number of micro slots, a subframe/radio frame includes an integer number of time slots, a radio frame includes an integer number of subframes, and the like.

It should be understood that, in the embodiment of the present invention, the format refers to time domain, frequency domain, space domain, or code domain resources used for carrying a physical signal or channel, and in the present application, mainly refers to time domain resources. In this embodiment of the present invention, the second format may also be referred to as a normal subframe format, that is, the time length of the first format is smaller than the time length of the second format. The second scheduling time unit has the same granularity but different number as the first scheduling time unit, for example, the first scheduling time unit and the second scheduling time unit correspond to subframes with different frame numbers respectively.

Referring to fig. 1, an application scenario of the present application is introduced below, where fig. 1 is a schematic diagram of a cooperative transmission scenario according to an embodiment of the present invention. As shown in fig. 1, the scenario takes a first base station and a second base station as an example, where both the first base station and the second base station may execute the information transmission method provided in the embodiment of the present invention. The first base station and the second base station jointly transmit data for the user equipment, so that the network capacity can be improved.

Referring to fig. 2, fig. 2 is a schematic structural diagram of a symbol according to an embodiment of the present invention, and as shown in fig. 2, each symbol may be formed by a CP or ZP and a data portion; when signals transmitted by the first base station and the second base station reach the user equipment, the signals received by the user equipment are the fusion of the signals transmitted by the first base station and the second base station, and further, the user equipment decodes the received signals simultaneously in time, so when the signals transmitted by the first base station and the second base station do not correspond to each other on each symbol, or the time difference of the phase error on each symbol is greater than the CP or ZP part, when the user equipment demodulates by taking one symbol as a unit, the interference of other symbols is introduced, for example, when the first symbol is demodulated, the interference of the second symbol is introduced. As shown in fig. 3a, for convenience of description, signals received by the user equipment are respectively illustrated as two signals of a signal of the first base station and a signal of the second base station to explain inter-symbol interference caused by a time difference between signals arriving at the user equipment.

Let t be the time difference between the time when the signal transmitted by the first base station arrives at the user equipment and the time when the signal transmitted by the second base station arrives at the user equipment₁The time length of CP or ZP is t₂One scheduling subframe includes X symbols. When t is₁Less than t₂In the two paths of signals, the time overlapping part between different symbols does not exceed the duration of CP or ZP, for example, the symbol 1 in the signal sent by the second base station only overlaps with the CP or ZP of the symbol 2 in the signal sent by the first base station, and since the CP or ZP does not contain information and does not affect the orthogonality between subcarriers in the symbol, the symbol 1 of the first base station and the symbol 1 of the second base station do not introduce the interference of the symbol 2 during demodulation, that is, the orthogonality between subcarriers of the OFDM system is not affected.

When t is shown in FIG. 3b₁Greater than t₂In two paths of signals, the time overlapping part between different symbols exceeds the duration of CP or ZP, for example, the overlapping part between symbol 1 in the signal sent by the second base station and symbol 2 in the signal sent by the first base station is greater than the duration of CP or ZP, so that symbol 1 of the first base station and symbol 1 of the second base station introduce interference of symbol 2 when demodulating, thereby destroying orthogonality between subcarriers of the OFDM system and reducing demodulation performance.

In order to solve the above problem, the present application provides an information transmission method, which configures a format (which may be referred to as a subframe format when a scheduling unit is a subframe) and adjusts transmission times of a first base station and a second base station, so that signals transmitted by the first base station and the second base station can reach a user equipment at the same time, thereby avoiding inter-symbol interference and improving demodulation performance.

The information transmission method of the embodiment of the invention can be suitable for the first base station and can also be suitable for the second base station, and for convenience of description, the information transmission method is uniformly described for network equipment.

Optionally, before configuring the first format of the first scheduling time unit, the network device further needs to perform the following steps:

the network equipment determines the time difference t of the signals transmitted by the first base station and the second base station reaching the user equipment₁(ii) a And the network equipment judges the time difference t₁Whether it is greater than the time length of CP or ZP, when the time difference t is greater than₁When the time length of the CP or ZP is longer than the time length of the CP or ZP, a first format is configured, the time duration of the first format in the time domain is shorter, for example, shorter than the time duration of a normal format, for example, the time duration of a normal subframe format, and when the time difference t is greater than the time duration of the normal subframe format₁When the time length of the CP or ZP is less than or equal to the time length of the CP or ZP, other formats, that is, formats without considering the time difference, such as a normal subframe format, may be configured for the first scheduling time unit.

S801, the network equipment configures a first format of a first scheduling time unit.

S802, the network equipment sends the indication information of the first format adopted by the first scheduling time unit.

The network device may send the first format adopted by the first scheduling time unit only to the first base station, or may send the first format adopted by the first scheduling time unit to the first base station and the second base station at the same time. Optionally, the first base station and the second base station may use the same format, for example, both use the first format; different formats may also be used, for example, if the indication information in the first format includes two indication fields in different formats, each of which includes an indication in a different format (or the same indication field includes an indication in a group of formats), the first base station and the second base station may use different formats.

Please refer to fig. 10, 10 is a schematic flow chart of another information transmission method according to an embodiment of the present invention; the information transmission method may include the steps of:

s1001, the user equipment can receive indication information of a first format adopted by a first scheduling time unit;

s1002, the user equipment determines a first format of the first scheduling time unit according to the indication information of the first format.

In the embodiment of the invention, the first base station determines the time difference t of the arrival of the signals sent by the first base station and the second base station to the user equipment₁The following embodiments may be included:

as an optional implementation manner, the first base station triggers the ue to report a time difference between arrival of signals sent by the first base station and the second base station at the ue.

For example, the user equipment determines the time difference of arrival of the reference signals for synchronization transmitted by the first base station and the second base station; and the user equipment reports the time difference between the first base station and the second base station to the first base station.

The Reference Signal for Synchronization may be a Synchronization Signal (SS), a Mobility Reference Signal (MRS), a positioning Reference Signal, or the like, but the present invention is not limited thereto. The reporting mode of the time difference may be reporting through a Media Access Control element (MAC CE), a Radio Resource Control (RRC) message, or a Non Access Stratum (NAS) message, and the specific reporting mode is not limited in the present invention.

As another optional implementation, the first base station or the second base station determines, according to a reception time difference of uplink signals of the user equipment received by the first base station and the second base station, a time difference of arrival at the user equipment of signals sent by the first base station and the second base station. The Uplink Signal for determining the time difference between the signals sent by the first base station and the second base station and reaching the ue may be an Uplink Sounding Reference Signal (SRS), an Uplink Demodulation Reference Signal (DM-RS), a Physical Uplink random Access Channel (PRACH), a Physical Uplink Shared data Channel (PUSCH), or a Physical Uplink Control Channel (PUCCH), which is not limited in the present invention.

It should be noted that, the calculated time difference has a uniform reference time, and the time when the reference signals sent by the first base station and the second base station respectively reach the user equipment, or the time when the first base station and the second base station respectively receive the uplink signal of the user equipment is different from the reference time, so as to obtain the time difference between the first base station and the second base station. The unified reference time may be a time corresponding to the first base station or a time corresponding to the second base station, or a reference time negotiated between the first base station and the second base station, for example, a time corresponding to a Global Positioning System (GPS) is used as the reference time, and the specific reference time is not limited in the present invention.

In this embodiment of the present invention, the first base station configures a first format of a first scheduling time unit, which may specifically be: the first base station configures a first format for the first scheduling time unit according to the calculated time difference.

As an alternative implementation, the first format includes n fewer symbols than the second format, where n is an integer greater than or equal to 1. The first format is a special format configured during the second transmission, and when the first scheduling time unit is a subframe, the first format may also be referred to as a special subframe format; the second format is a common format or a normal format, for example, when the scheduling time unit is one subframe, the second format may be referred to as a normal subframe format.

As another optional implementation manner, the subcarrier spacing of the head symbol or the tail symbol of the first format is m times of the subcarrier spacing of the remaining symbols in the first format, and m is a rational number greater than 1.

In summary, in order to adjust the signal transmission time of the first base station and/or the second base station so that the signals transmitted by the two base stations arrive at the user equipment at the same time, the time length of the first format is smaller than that of the second format, that is, when the scheduling unit is a subframe, the first format is a short frame.

Specifically, the first symbol or the last symbol of the first format may be a special symbol, that is, a symbol different from the rest symbols in the first format, for example, the first symbol or the last symbol is a blank symbol, or the subcarrier spacing of the first symbol or the last symbol is larger than the subcarrier spacing of the rest symbols of the subframe.

The first symbol is generally a symbol from a Physical Downlink Shared Channel (PDSCH) or a Physical Uplink Shared Channel (PUSCH), or in a subframe structure where a pilot used for PDSCH or PUSCH demodulation is in front of a corresponding PDSCH or PUSCH (possibly, the PDSCH or PUSCH is not carried in the symbol where the pilot is located, or a PDSCH or PUSCH is carried in a part of radio resource REs), the symbol where the pilot is located is also referred to as the first symbol; accordingly, a symbol where the PDSCH or PUSCH ends is referred to as a tail symbol.

In the embodiment of the present invention, the indication information in the first format may be carried in a higher layer signaling or a physical layer signaling. Optionally, when the user equipments are closer to each other, the higher layer signaling or the physical layer signaling may configure the indication information in the first format for a group of user equipments, that is, the higher layer signaling or the physical layer signaling is a message at a user equipment level or a user equipment group level.

Optionally, the high layer signaling or the physical layer signaling may also carry quasi co-located QCL information corresponding to the first format. The Quasi-Co-Location (QCL) of the antenna ports means that signals transmitted from the Quasi-Co-located antenna ports undergo the same large-scale fading, where the large-scale fading includes delay spread, doppler shift, average channel gain, average delay, and channel space characteristics. The QCL information indicates that the currently used antenna port group and an antenna port transmitted by a certain configured resource satisfy a QCL relationship. Optionally, the network side device may configure multiple sets of resource information for the ue in advance, where the resource information may include one or more of resource information corresponding to a channel state reference signal CSI-RS, an identification number ID for identifying the resource information, resource information corresponding to a cell level reference signal, an ID corresponding to the resource information, synchronization channel resource information for performing synchronization, resource information for identifying spatial resources such as beams, and resource information corresponding to a mobility reference signal MRS for mobility management. Optionally, each group of resource information in the multiple groups of resource information corresponds to a group number, and by indicating the QCL relationship between the currently used antenna port group and the resource information of the corresponding group, the user equipment may be assisted to perform channel estimation and signal demodulation jointly with the DMRS sent by the currently used antenna port and the resource information of the corresponding group, so as to improve demodulation performance.

In this embodiment of the present invention, the indication information of the first format may include subcarrier spacing information of a leading symbol or a trailing symbol, and may also include a starting symbol position and a symbol number included in the format.

Optionally, the indication information may further include an indication value corresponding to the first format or format group adopted by the first scheduling time unit, that is, the system determines a correspondence between the optional multiple formats or multiple format combinations and the indication value in a predefined manner, and the indication information may include only the indication value, that is, the corresponding format or format group may be determined.

The indication information of the first format may include a starting symbol position and a symbol number included in the first format adopted by the first scheduling unit; or the indication information of the first format includes a starting symbol position and a symbol number included in each format in a format group adopted by the first scheduling unit, where the format group includes the first format and a second format, and the second format corresponds to a first scheduling time unit of another network device, or a second scheduling time unit of the network device, and the granularity of the second scheduling time unit is the same as that of the first scheduling time unit, but the number of the second scheduling time unit is different from that of the first scheduling time unit.

Optionally, the sampling start time may be indicated using a message for indicating QCLs, the UE may receive data transmitted from antenna ports of multiple sets of QCLs through RRC configuration, the UE is indicated by DCI which set of QCL parameters is used by the UE (in this case, the first base station and the second base station use the same subframe format), or a timing corresponding to one set of QCL parameters in the multiple sets of QCL parameters (in this case, the first base station and the second base station use different subframe formats) is used as a reception timing of the first scheduling time unit, and the QCL parameters of the remaining sets are only used for corresponding channel estimation, where the reception timing includes multiple sets of QCL information indications and one set of QCL information indications for the reception timing.

Optionally, the sampling start point may also be set by a synchronized pilot, for example, an additional pilot, such as a full-bandwidth pilot, is inserted into the subframe for performing accurate time-frequency synchronization, the full-bandwidth pilot is similar to CSI-RS or MRS, and when a special subframe is configured by RRC or MAC CE, the pilot for synchronization is indicated or default to be sent in the subframe at the same time.

It can be seen that, with the information transmission method according to the embodiment of the present invention, the network device may dynamically configure the first format of the first scheduling time unit, so that, in combination with the adjustment of the transmission times of the first base station and the second base station, the time synchronization or the time difference between signals transmitted by the first base station and the second base station and reaching the user equipment is within the duration range of the CP or ZP, that is, the symbols included in the first scheduling time unit are aligned or the time difference between different symbols is within the duration range of the CP or ZP, thereby avoiding introducing interference between symbols and improving the demodulation performance of the system.

Referring to fig. 4, fig. 4 is a schematic diagram of a first format according to an embodiment of the present invention, as shown in fig. 4, a scheduling subframe adopting the first format includes n symbols less than a normal symbol number X, where n is an integer greater than or equal to 1.

First optionally, the first format may be that, in the first format of the scheduling time unit, k consecutive symbols from the head symbol and n-k consecutive symbols before the tail symbol and including the tail symbol are all blank symbols, where k is an integer greater than or equal to 0 and less than or equal to n, or that k symbols in the scheduling unit are not subjected to resource mapping. For example, a normal subframe format includes 14 symbols, and the special subframe format may include 14-n symbols, where n is typically 1.

The following describes how the first base station determines the special subframe format according to the time difference by taking the first scheduling time unit as an example of one subframe.

For example, when the time difference t₁A time length t less than a normal symbol₃And the time of the signal transmitted by the first base station arriving at the UE is earlier than the time of the signal transmitted by the second base station arriving at the UE, i.e. the time difference t₁Greater than zero and less than t₃The first base station may transmit downlink data for the UE in the special subframe format, where n is 1, and delay the transmission time by t₃-t₁。

Specifically, the delay time for the first base station to send the downlink data is t₃-t₁Meanwhile, the last symbol, that is, the tail symbol cannot transmit data due to the delayed transmission, so that the tail symbol in the special subframe format adopted by the first base station is a blank symbol.

For another example, when the time difference t₁Time length t less than one symbol₃And the time T of the signal sent by the first base station reaching the UE₁Before the time T of arrival of the signal transmitted by the second base station at the UE₂I.e. the time difference t₁Greater than t₂And is less than t₃Then the first base station can adopt the special subframe format and advance the transmission time of the second base station by t₃-t₁. The special subframe format is that the first symbol is a blank symbol, that is, the first base station starts to transmit downlink data from the second symbol.

For another example, when the time difference t₁Time length t less than one symbol₃And the time of arrival of the signal transmitted by the first base station at the UE is later than the time of arrival of the signal transmitted by the second base station at the UE, i.e. the time difference t₁Greater than t₂And is less than t₃The first base station may send downlink data in the normal subframe format in the scheduling subframe, but the second base station needs to delay the sending time backward, where the delay time of the sending time is t₃-t₁Correspondingly, the last symbol of the scheduling subframe cannot be sent, so that the second base station needs to adopt a special subframe format in the scheduling subframe, that is, the tail symbol is a blank symbol, that is, resource mapping is not performed at the tail symbol.

For another example, when the time difference t₁Time length t less than one symbol₃And the time of arrival of the signal transmitted by the first base station at the UE is later than the time of arrival of the signal transmitted by the second base station at the UE, i.e. the time difference t₁Greater than t₂And is less than t₃If the absolute value of the first base station is greater than the absolute value of the second base station, the first base station adopts a special subframe format, namely the first symbol is a blank symbol, and meanwhile, the second base station delays the sending time, wherein the delay time is t₃-t₁。

Optionally, the set of symbols used for carrying the demodulation reference signal included in the first format partially overlaps or completely overlaps with the set of symbols used for carrying the demodulation reference signal included in the second format. Therefore, the pilot alignment of the two base stations arriving at the user equipment can be ensured, and if the pilot alignment is not ensured, the interference between the pilot and the data can be caused.

Optionally, the first base station and/or the second base station may notify the first format and/or the second format of the first scheduling time unit in a plurality of ways, that is, the format of the first scheduling time unit may be configured in a plurality of ways.

Optionally, the indication Information of the first format may be notified through a high-level signaling or Downlink Control Information (DCI), and the user equipment may demodulate the received signal according to the indication Information to obtain the first format adopted by the first scheduling time unit.

Optionally, the indication field corresponding to the higher layer signaling or DCI notification message and used for indicating the first format may indicate by joint coding of a symbol start position (i.e. a start symbol position where downlink data starts to be mapped) and a symbol number, for example:

00: beginning with the a-th symbol and having a length of a normal subframe (e.g., L)₁One symbol length);

01: a symbol start of length L₂A symbol, L₂<L₁；

10: beginning with the b-th symbol and having a length of L₃A symbol;

11: beginning with the b-th symbol and having a length of L₄A symbol.

Wherein a and b are predefined by the system or configured by messages, which is not limited in this application, L₁、L₂、L₃、L₄Predefined for the system or configured by message, the application is not limited.

Optionally, the first resource mapping may further configure multiple groups of possible structures through a high-level signaling, and dynamically notify a subframe structure configured by the high-level signaling, which is used by the current scheduling subframe, through DCI, for example, four possible structures are configured by the high-level signaling:

0: x th₁Starting with a symbol of length L₁A symbol;

1: x th₂Starting with a symbol of length L₂A symbol;

2: x th₃Starting with a symbol of length L₃A symbol;

3: x th₄Starting with a symbol of length L₄A symbol.

The four structures are distinguished by the identifier ID configured by the high-level signaling, the DCI of the physical layer signaling may dynamically indicate that the first scheduling time unit uses one of the four subframe structures configured by the high-level signaling, for example, when the indication domain of the subframe structure corresponding to the DCI is 2, it indicates that the structure adopted by the first scheduling time unit is: x th₂Starting with a symbol of length L₂A symbol.

Optionally, when the formats or subframe formats adopted by the first base station and the second base station are different, for example, the corresponding symbol numbers are different, the two formats or subframe structures corresponding to the first scheduling time unit may be notified through high-level signaling or DCI;

optionally, the indication field corresponding to the higher layer signaling or DCI notification message and used for simultaneously indicating two formats or subframe structures may indicate by joint coding of a symbol start position and a symbol number, for example:

00: both subframe formats start with the a-th symbol and are of the normal subframe format (e.g., L)₁Length of symbol)

01: one subframe format is started by the a-th symbol and has a length of L₂A symbol, L₂<L₁The other subframe format is a normal subframe format;

10: the two subframe formats are started by the b-th symbol and have the length of L₃A symbol;

11: one subframe format is started by the b-th symbol and has a length of L₄One symbol, the other subframe format is a normal subframe format.

Wherein a and b are predefined by the system or configured by messages, L is not a limitation of the present invention₁、L₂、L₃、L₄Predefined for the system or configured by message, the invention is not limited.

Optionally, when the formats or subframe formats adopted by the first base station and the second base station in the first scheduling time unit are different, that is, the corresponding symbol numbers are different, multiple groups of possible subframe formats may also be configured through the high-level signaling, and the current scheduling subframe or the current scheduling time unit may be dynamically notified through DCI, where the format combination or subframe format combination configured by the high-level signaling is used for the notification, and the content of the high-level signaling and the DCI message has multiple implementation manners, for example, the high-level signaling configures four subframe format combinations including two subframe formats:

0: both subframe formats start with the a-th symbol and are of the normal subframe format (e.g., L)₁Length of symbol)

1: one subframe format is a start of a symbol of aDegree L₂A symbol, L₂<L₁The other subframe format is a normal subframe;

2: the two subframe formats are started by the b-th symbol and have the length of L₃A symbol;

3: one subframe format starts with the b-th symbol and has a length of L4 symbols, and the other subframe format is a normal subframe format.

The four subframe formats can be distinguished by the identifier ID configured by the high-level signaling, the DCI in the physical layer signaling can dynamically indicate the scheduling time unit or the scheduling subframe to use one of the four subframe format combinations configured by the high-level signaling, for example, when the indication field of the subframe format corresponding to the DCI is 1, it indicates that the corresponding subframe format combination is: one subframe format is started by the a-th symbol and has a length of L₂A symbol, L₂<L₁And the other subframe format is a normal subframe.

For another example, the higher layer signaling configures four possible subframe formats:

0: a symbol start of length L₁A symbol;

1: a symbol start of length L₂A symbol;

2: beginning with the b-th symbol and having a length of L₃A symbol;

3: beginning with the b-th symbol and having a length of L₄A symbol.

The four subframe formats can be distinguished by the identifier ID configured by the high-level signaling, the physical layer signaling DCI can dynamically indicate which two of the four subframe formats configured by the high-level signaling DCI or the scheduling time unit use, and the four subframe formats can be indicated by joint coding, for example:

for example, if the DCI corresponding to the subframe format indication field is 0001, it indicates that the corresponding subframe format combination is: one subframe format is started by the a-th symbol and has a length of L₂A symbol, L₂<L₁In addition, anotherOne subframe format is a normal subframe format.

Since the data layers carried on the different subframe formats are transmitted from different base stations, the corresponding transmit antenna port groups do not satisfy the QCL requirements. Optionally, the QCL information of the transmitting antenna ports corresponding to different subframe formats may be indicated by independent or joint coding through high layer signaling or physical layer DCI. Optionally, the higher layer signaling for sending the QCL related information and the higher layer signaling for configuring the subframe format may be different information elements IE of the same higher layer signaling. Optionally, the physical layer message used for indicating the QCL-related information for actual PDSCH/PUSCH transmission and the physical layer message configuring the subframe format may be different indication fields of the same physical layer message or joint coding of the same indication field. The invention is not limited.

Optionally, the high layer signaling or the physical layer control information DCI configuring the subframe format may be a UE-level message or a UE group-level message. The UE-level message, the high-level signaling may be carried through an RRC message or an MAC CE message, the DCI is carried through a user-level downlink control channel, such as a Physical Downlink Control Channel (PDCCH), the user-level PDCCH channel performs resource mapping in a user-level search space, and the bitstream information after the DCI content coding is scrambled using an identifier ID allocated to the user; the UE group level message, the high level signaling may be carried through a multicast or broadcast message, the physical layer control information DCI is carried through a PDCCH channel of a user group level, a group of users greater than or equal to 1 may simultaneously monitor and receive the PDCCH of the user group level, bit stream information after DCI content coding is scrambled using an identifier ID allocated to the group of users, and optionally, the PDCCH channel of the user group level performs resource mapping in a user group level or a common search space.

Referring to fig. 5a and 5b, fig. 5a and 5b are schematic diagrams of two first formats according to an embodiment of the present invention, respectively, where a head symbol of the first format in fig. 5a is a special symbol, and a tail symbol of the first format in fig. 5b is a special symbol, that is, a subcarrier interval of the head symbol or the tail symbol in a scheduling subframe adopting the first format is m times a subcarrier interval of the remaining symbols in the scheduling subframe, and m is a rational number greater than 1.

The reciprocal of the subcarrier interval of the symbol is the length of the symbol after the CP is removed, so the subcarrier interval of the head symbol or the tail symbol can be enlarged to shorten the length of the symbol, thereby making the scheduling subframe a short frame and ensuring the time synchronization of the signals transmitted by the first base station and the second base station to the user equipment.

Specifically, assume that the subcarrier spacing at each symbol in the normal subframe format is Δ f_kThen the subcarrier spacing at the head symbol or the tail symbol in the special subframe format is m × Δ f_kAnd m is a fraction or an integer greater than 1.

Wherein, m can be flexibly indicated by high layer signaling configuration or DCI_kTo the user equipment; optionally, m may also be predefined by the system, and when the subframe is configured or indicated as a special subframe, the subcarrier spacing of the first symbol or the last symbol of the special subframe is then m × Δ f_k。

Correspondingly, the subcarrier spacing of the head symbol or the tail symbol of the special subframe is m × Δ f_kCorrespondingly, the number of the sub-carriers corresponding to the head symbol or the tail symbol is also reduced, and is at most 1/m of the sub-carrier data corresponding to the normal subframe or other symbols in the subframe.

Optionally, the head symbol or the tail symbol of the special subframe may also adopt a special CP, that is, a special number of sampling points are corresponding to, the length of the special CP is different from the CP of all symbols in the normal subframe and the CP length corresponding to other symbols in the subframe, and the length of the special CP may be multiple possibilities predefined by the system, and is notified to the user equipment through a high-level signaling or DCI to use which of the two possibilities; optionally, the system may be predefined well, and as long as the current subframe is notified as the special subframe through the high-level signaling or DCI, the user equipment may know that the CP of the length is used for the head symbol or the tail symbol of the special subframe; optionally, the length of the special CP may be dynamically notified to the user equipment through higher layer signaling or DCI.

How the first base station determines this special subframe format from the time difference is explained below.

It is assumed that the signal transmitted by the first base station arrives at the UE earlier than the signal transmitted by the second base station, i.e. the time difference t between the two₁Greater than t₂The first base station may use the tail symbol in the special subframe format as a special symbol, issue data for the ue, and delay the sending time later.

For example, the duration of a valid data symbol in a normal symbol is T_symb＝1/Δf_kThe duration of CP is T_CP,symbThen the system support can be calculated to be greater than 1/(T)_symb+T_CP,symb-t₁) Will be greater than 1/(T)_symb+T_CP,symb-t₁) Is denoted as m × Δ f_k(ii) a The first base station may adopt a subcarrier spacing of a tail symbol in the scheduling subframe as m x Δ f_kCorrespondingly, if the length of the tail symbol CP of the scheduling subframe is the same as that of the tail symbol of the normal subframe, the time length of the backward delay of the transmission time of the first base station is T_symb-1/(m*Δf_k) Otherwise, the time length of the later delay of the sending time of the first base station is T_symb+T_CP,symb-T_CP,symb,new-1/(m*Δf_k) Wherein T is_CP,symb,newIs the CP length of the configured tail symbol.

It is assumed that the signal transmitted by the first base station arrives at the UE later than the signal transmitted by the second base station, i.e. the time difference t between the two₁If the value is less than zero, the second base station can adopt the tail symbol in the special subframe format as a special symbol, issue data for the user equipment and delay the sending time by T_symb-1/(m*Δf_k)。

In the embodiment of the present invention, the first format, that is, the notification method of the special subframe format is similar to the notification method of the first format shown in fig. 4, and when the first base station and the second base station adopt the special subframe format in the same scheduling subframe, the subcarrier intervals of the head symbol or the tail symbol of the first base station and the second base station are the same, that is, the m values are the same.

For example, the indication information of the first format may be notified through higher layer signaling or DCI, and the user equipment may demodulate the received signal according to the indication information to obtain the first format adopted by the first scheduling time unit.

Optionally, the indication field corresponding to the higher layer signaling or DCI notification message and used for indicating the first format may determine the subcarrier spacing by an indication, for example:

00: subcarrier spacing of m₁；

01: subcarrier spacing of m₂；

10: subcarrier spacing of m₃；

11: subcarrier spacing of m₄。

Wherein m is₁-m₄Are predefined by the system or configured through messages, and are not limited in this application. I.e. the value of the indicator field is 00, the subcarrier spacing representing the leading or trailing symbol in the first format is m₁。

Optionally, the high layer signaling or the physical layer control information DCI configuring the subframe format may be a UE-level message or a UE group-level message. The UE level message, the high level signaling can be carried through RRC message or MAC CE message, the physical layer control information DCI is carried through the PDCCH of the user level, the PDCCH of the user level carries out resource mapping in the user level search space, and the bit stream information after the DCI content coding is scrambled by using the identification ID distributed for the user; the UE group level message, the high level signaling may be carried through a multicast or broadcast message, the physical layer control information DCI is carried through a PDCCH channel of a user group level, a group of users greater than or equal to 1 may simultaneously monitor and receive the PDCCH of the user group level, bit stream information after DCI content coding is scrambled using an identifier ID allocated to the group of users, and optionally, the PDCCH channel of the user group level performs resource mapping in a user group level or a common search space.

Alternatively, the first format shown in fig. 5 and the first format shown in fig. 4 may be used in combination, for example, the first scheduling time unit includes n symbols less than the normal symbol number X, and the subcarrier interval of the first symbol where the data starts to be mapped or the pilot used for demodulating the data is located is m, and accordingly, the network device may determine the adjustment amount of the transmission time of the first base station and the second base station and the sampling start point of the user equipment by combining these two values.

Referring to fig. 6, fig. 6 is a schematic diagram of another first format according to an embodiment of the present invention, and as shown in fig. 6, a first symbol of a scheduled subframe adopting the first format uses a longer CP.

The first format also has similar features to the first format shown in fig. 4, that is, the first format includes n fewer symbols than the second format of the scheduling unit, where n is an integer greater than or equal to 1.

Unlike the format shown in fig. 5 described above, the data portion of the first symbol in the first format has the same subcarrier spacing as the data portion of the normal symbol (or other symbols in the first format).

That is, in the embodiment of the present invention, the duration of the data portion of each symbol in the second format is the same, the duration of the CP portion is also the same, and the CP length of the first symbol in the first format may be determined according to the time difference between the signals transmitted by the first base station and the second base station and reaching the UE, that is, the first symbol in the first format corresponds to multiple CP lengths, and the first base station may dynamically indicate which CP length is specifically used by the first symbol through RRC, MAC CE, or DCI.

The following describes how the first base station configures the special subframe format according to the time difference by taking the scheduling unit as one subframe as an example.

Optionally, it is assumed that the time of arrival of the signal transmitted by the first base station at the UE is earlier than the time of arrival of the signal transmitted by the second base station at the UE, and the time difference t between the two times₁Greater than t₂And is less than t₃The first base station may transmit data to the ue using the special subframe in the scheduling subframe, and delay the transmission time.

E.g. time of reporting by the UEThe time difference between the uplink signals or the time difference calculated according to the arrival time of other uplink signals of the UE to each base station is recorded as t₁The CP length of a normal data symbol is assumed to be T_CP,symbCalculate greater than (T)_symb+T_CP,symb-t₁) CP length of (1), noted as T_CP,specThen the total length of the CP of the first symbol of the special subframe becomes T_CP,spec+T_CP,symbThe time length of the transmission time delay of the first base station is T_symb+T_CP,symb-T_CP,spec。

Optionally, if the time of the signal sent by the first base station reaching the UE is later than the time of the signal sent by the second base station reaching the UE, the second base station may send data to the UE by using the special subframe in the scheduling subframe, and delay the sending time backward, where the delay time is T_symb+T_CP,symb-T_CP,spec。

In the embodiment of the present invention, the first format, that is, the notification method of the special subframe format is similar to the notification method of the first format shown in fig. 4, and when the first base station and the second base station use the special subframe format in the same scheduling subframe, the formats used by the first base station and the second base station may be different, that is, one of the first base station and the second base station may use the format shown in fig. 6, and the other may use the format shown in fig. 4. Of course, if one of the base stations can use the format shown in fig. 6 to solve the problem to be solved by the embodiment of the present invention, the other base station can use a normal subframe format. Therefore, in the embodiment of the present invention, the notification method may also be performed in a format or a format group in combination with the notification method shown in fig. 4.

For example, an indication field corresponding to the higher layer signaling or the DCI notification message for indicating the first format may be notified by indicating the CP length, for example:

00: CP Length is Normal Length (e.g. |)₁Length);

01: CP Length of l₂，l2<l₁；

10: CP Length of l₃；

11: CP Length of l₄。

Wherein l₁-l₄The configuration may be predefined for the system or configured through messages, and the application is not limited.

0: CP Length is Normal Length (e.g. |)₁)；

1: CP Length of l₂，l₂<l₁；

2: CP Length of l₃，l₃<l₂；

3: CP Length of l₄，l₄<l₃。

The four structures are distinguished by the identifier ID configured by the high-level signaling, the DCI of the physical layer signaling may dynamically indicate that the first scheduling time unit uses one of the four subframe structures configured by the high-level signaling, for example, when the indication domain of the subframe structure corresponding to the DCI is 2, it indicates that the structure adopted by the first scheduling time unit is: the CP length of the first symbol is l₃。

Optionally, when the formats or subframe formats adopted by the first base station and the second base station are different, for example, two formats or subframe structures corresponding to the first scheduling time unit may be notified through high-level signaling or DCI;

optionally, the indication field corresponding to the higher layer signaling or DCI notification message and used for simultaneously indicating two formats or subframe structures may be, for example:

00: the CP length of the first symbol of the two subframe formats is the CP length of the normal subframe format (e.g. /)₁)

01: the CP length of the first symbol of a subframe format is l₂The other subframe format is a normal subframe format;

10: the CP length of the first symbol of the two subframe formats is l₃；

11: of the first symbol of a subframe formatCP Length of l₄And the other subframe format is a normal subframe format.

Optionally, when the formats or subframe formats adopted by the first base station and the second base station in the first scheduling time unit are different, multiple groups of possible subframe formats may also be configured through the high-level signaling, and the current scheduling subframe or the format combination configured by the high-level signaling or the subframe format combination used by the current scheduling time unit is dynamically notified through DCI, where the content of the high-level signaling and the DCI message has multiple implementation manners, for example, the high-level signaling configures four subframe format combinations including two subframe formats:

0: the CP length of the first symbol of the two subframe formats is the CP length of the normal subframe format (e.g. /)₁)

1: the CP length of the first symbol of a subframe format is l₂The other subframe format is a normal subframe format;

2: the CP length of the first symbol of the two subframe formats is l₃；

3: the CP length of the first symbol of a subframe format is l₄And the other subframe format is a normal subframe format.

The four subframe formats can be distinguished by the identifier ID configured by the high-level signaling, the DCI in the physical layer signaling can dynamically indicate the scheduling time unit or the scheduling subframe to use one of the four subframe format combinations configured by the high-level signaling, for example, when the indication field of the subframe format corresponding to the DCI is 1, it indicates that the corresponding subframe format combination is: the CP length of the first symbol of one subframe format is l2, and the other subframe format is a normal subframe format.

0: CP Length is Normal Length (e.g. |)₁)；

1: CP Length of l₂，l₂<l₁；

2: CP Length of l₃，l₃<l₂；

3: CP Length of l₄，l₄<l₃。

for example, if the DCI corresponding to the subframe format indication field is 0001, it indicates that the corresponding subframe format combination is: the length of the first symbol CP in one sub-frame format is normal length, and the length of the first symbol CP in the other sub-frame format is l₂。

Since the data layers carried on the different subframe formats are transmitted from different base stations, the corresponding transmit antenna port groups do not satisfy the QCL requirements. Optionally, the QCL information of the transmitting antenna ports corresponding to different subframe formats may be indicated by independent or joint coding through high layer signaling or physical layer DCI. Optionally, the higher layer signaling for sending the QCL related information and the higher layer signaling for configuring the subframe format may be different information elements IE of the same higher layer signaling. Optionally, the physical layer message used for indicating the QCL-related information for actual PDSCH/PUSCH transmission and the physical layer message configuring the subframe format may be different indication fields of the same physical layer message or joint coding of the same indication field. The invention is not limited. Wherein the higher layer signaling may be a message from a higher layer.

Referring to fig. 7, fig. 7 is a schematic diagram of another first format according to an embodiment of the present invention, in which a head symbol or a tail symbol of the first format is mapped through a special resource map.

The principle of this first format is the same as that of the second format described above, i.e. the head/tail symbol length is dynamically adjusted by adjusting the subcarrier spacing for effective transmission. It may also be referred to as employing distributed resource mapping.

For example, in a normal Physical layer data channel transmission flow, data allocated to a certain UE is coded, modulated, and MIMO-processed within an effective bandwidth, and then mapped onto an allocated Physical Resource Block (PRB). On the normal symbols of the normal subframe or the special subframe, the modulation symbols are continuously mapped in one allocated PRB, that is, data or pilot is mapped in all REs in the PRB, and on the special symbols of the special subframe, data mapping is not performed on subcarriers with fixed intervals. Fig. 7 is a mapping manner of subcarriers mapped by special resources, where each square in fig. 7 represents an RE in the same symbol, data is mapped every other subcarrier, and other subcarriers do not map data or map to 0.

Therefore, in the embodiment of the present invention, how to determine the interval of the resource mapping and the adjustment amount of the transmission time according to the time difference may refer to the related description in the embodiment shown in fig. 6, and will not be described in detail here.

The method according to the embodiment of the present invention is explained in detail above, and the following provides a device or a user equipment according to the embodiment of the present invention. The apparatus or the user equipment corresponding to the embodiment of the present invention may execute the relevant processes or embodiments in the above embodiments of the present invention.

Referring to fig. 9, fig. 9 is a schematic structural diagram of a transmission apparatus according to an embodiment of the present invention, where the transmission apparatus may be disposed in a network device, and as shown in fig. 9, the transmission apparatus described in this embodiment includes:

a configuration module 901, configured to configure a first format of a first scheduling time unit;

a sending module 902, configured to send the indication information in the first format used by the first scheduling time unit.

Optionally, a symbol set included in the first format and used for carrying a demodulation reference signal partially overlap or completely overlap with a symbol set included in the second format and used for carrying a demodulation reference signal, where the second format corresponds to a first scheduling time unit of another network device, or a second scheduling time unit of the network device, where the second scheduling time unit has the same granularity as that of the first scheduling time unit but different numbers; the time length of the first format is smaller than the time length of the second format.

Optionally, the indication information of the first format is carried in a higher layer signaling or a physical layer signaling.

Optionally, the higher layer signaling or the physical layer signaling is a message at a user equipment level or a user equipment group level.

Optionally, the high layer signaling or the physical layer signaling further carries quasi co-located QCL information corresponding to the first format.

Optionally, the number of symbols included in the first format is n less than the number of symbols included in the second format, and n is an integer greater than or equal to 1.

Optionally, the subcarrier spacing of the head symbol or the tail symbol of the first format is m times of the subcarrier spacing of the remaining symbols in the first format, and m is a rational number greater than 1.

Optionally, the indication information of the first format includes subcarrier spacing information of a head symbol or a tail symbol in the first format used by the first scheduling unit.

Optionally, the indication information of the first format includes an indication value corresponding to a first format or a format group adopted by the first scheduling time unit, where the format group includes the first format and a second format; the indication value is used for indicating one format or one format group in selectable formats or format groups configured by the higher layer signaling or the physical layer signaling.

Optionally, the indication information of the first format includes a starting symbol position and a symbol number included in the first format adopted by the first scheduling unit; or the indication information of the first format includes a starting symbol position and a symbol number included in each format in a format group adopted by the first scheduling unit, where the format group includes the first format and a second format, and the second format corresponds to a first scheduling time unit of another network device, or a second scheduling time unit of the network device, and the granularity of the second scheduling time unit is the same as that of the first scheduling time unit, but the number of the second scheduling time unit is different from that of the first scheduling time unit.

Optionally, the sending module 902 is further configured to send information indicating a sampling start time in the first format.

Optionally, the indication information of the sampling start time includes at least one adjustment amount of the sampling start time and an indication value of one of the at least one adjustment amount; the at least one adjustment of the sampling start time is carried in the higher layer signaling; an indication of one of the at least one adjustment amount is carried in the physical layer signaling.

Optionally, the sampling start time of the first format is predefined.

Therefore, the information transmission device implementing the embodiment of the invention can dynamically configure the format of the first scheduling time unit, thereby enlarging the range of cooperative transmission, namely enlarging the cooperative radius and being beneficial to improving the system performance.

According to the foregoing method, fig. 11 is a first schematic diagram of a device provided in this embodiment of the present application, as shown in fig. 11, the device may be a user equipment, or may be a chip or a circuit, for example, a chip or a circuit that may be disposed in a user equipment. The user equipment may correspond to the user equipment in the above method.

The device may include a processor 110 and a memory 120. The memory 120 is used for storing instructions, and the processor 110 is used for executing the instructions stored by the memory 120 to implement the steps and embodiments of the methods corresponding to fig. 2 to 10.

Further, the apparatus may also include an input port 140 and an output port 150. Further, the apparatus may further comprise a bus system 130, wherein the processor 110, the memory 120, the input port 140 and the output port 150 may be connected via the bus system 130.

The processor 110 is configured to execute the instructions stored in the memory 120 to control the input port 140 to receive signals and the output port 150 to send signals, so as to complete the steps of the user equipment in the above method. Wherein input port 140 and output port 150 may be the same or different physical entities. When the same physical entity, may be collectively referred to as a transceiver. The memory 220 may be integrated in the processor 210 or may be provided separately from the processor 210.

As an implementation manner, the functions of the input port 140 and the output port 150 may be implemented by a transceiver circuit or a dedicated chip for transceiving. The processor 110 may be considered to be implemented by a dedicated processing chip, processing circuit, processor, or a general-purpose chip.

As another implementation manner, the user equipment provided in the embodiment of the present application may be implemented by using a general-purpose computer. Program code that implements the functionality of processor 110, input ports 140 and output ports 150 is stored in memory, and a general purpose processor implements the functionality of processor 110, input ports 140 and output ports 150 by executing the code in memory.

For the concepts, explanations, details and other steps related to the technical solutions provided in the embodiments of the present application related to the apparatus, please refer to the descriptions of the foregoing methods or other embodiments, which are not repeated herein.

Fig. 12 is a schematic structural diagram of a user equipment provided in the present application. The user equipment may be adapted for use in the system shown in fig. 1. For ease of illustration, fig. 12 shows only the main components of the user equipment. As shown in fig. 12, the user equipment includes a processor, a memory, a control circuit, an antenna, and an input-output device. The processor is mainly configured to process a communication protocol and communication data, control the entire user equipment, execute a software program, and process data of the software program, for example, to support the user equipment to perform the actions described in the above embodiment of the indication method for a transmission precoding matrix. The memory is mainly used for storing software programs and data, for example, indicating information of the first format or indicating information of the sampling start time described in the above embodiments. The control circuit is mainly used for converting baseband signals and radio frequency signals and processing the radio frequency signals. The control circuit and the antenna together, which may also be called a transceiver, are mainly used for transceiving radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, keyboards, etc., are used primarily for receiving data input by a user and for outputting data to the user.

When the user equipment is started, the processor can read the software program in the storage unit, interpret and execute the instruction of the software program, and process the data of the software program. When data needs to be sent wirelessly, the processor outputs a baseband signal to the radio frequency circuit after performing baseband processing on the data to be sent, and the radio frequency circuit performs radio frequency processing on the baseband signal and sends the radio frequency signal outwards in the form of electromagnetic waves through the antenna. When data is sent to user equipment, the radio frequency circuit receives radio frequency signals through the antenna, converts the radio frequency signals into baseband signals and outputs the baseband signals to the processor, and the processor converts the baseband signals into the data and processes the data.

Those skilled in the art will appreciate that fig. 12 shows only one memory and processor for ease of illustration. In an actual user equipment, there may be multiple processors and memories. The memory may also be referred to as a storage medium or a storage device, and the like, which is not limited in this respect in the embodiment of the present invention.

As an alternative implementation, the processor may include a baseband processor and a central processing unit, where the baseband processor is mainly used to process the communication protocol and the communication data, and the central processing unit is mainly used to control the whole user equipment, execute a software program, and process data of the software program. The processor in fig. 12 integrates the functions of the baseband processor and the central processing unit, and those skilled in the art will understand that the baseband processor and the central processing unit may also be independent processors, and are interconnected through a bus or the like. Those skilled in the art will appreciate that the user equipment may include multiple baseband processors to accommodate different network formats, multiple central processors to enhance its processing capability, and various components of the user equipment may be connected by various buses. The baseband processor can also be expressed as a baseband processing circuit or a baseband processing chip. The central processing unit can also be expressed as a central processing circuit or a central processing chip. The function of processing the communication protocol and the communication data may be built in the processor, or may be stored in the storage unit in the form of a software program, and the processor executes the software program to realize the baseband processing function.

For example, in the embodiment of the present invention, the antenna and the control circuit with transceiving function may be regarded as the transceiving unit 101 of the user equipment, and the processor with processing function may be regarded as the processing unit 102 of the user equipment. As shown in fig. 7, the user equipment includes a transceiving unit 101 and a processing unit 102. A transceiver unit may also be referred to as a transceiver, a transceiving device, etc. Alternatively, a device for implementing a receiving function in the transceiver unit 101 may be regarded as a receiving unit, and a device for implementing a sending function in the transceiver unit 101 may be regarded as a sending unit, that is, the transceiver unit 101 includes a receiving unit and a sending unit, the receiving unit may also be referred to as a receiver, an input port, a receiving circuit, and the like, and the sending unit may be referred to as a transmitter, a sending circuit, and the like.

According to the foregoing method, fig. 13 is a second schematic diagram of the device provided in the embodiment of the present application, and as shown in fig. 13, the device may be a network device, or may be a chip or a circuit, such as a chip or a circuit that may be disposed in a network device. The network device corresponds to the network device in the method. The device may include a processor 210 and a memory 220. The memory 220 is used for storing instructions, and the processor 210 is used for executing the instructions stored by the memory 220, so as to enable the device to implement the methods and embodiments corresponding to fig. 2 to 10.

Further, the network device may also include an input port 240 and an output port 250. Still further, the network may also include a bus system 230.

The processor 210, the memory 220, the input port 240 and the output port 250 are connected via the bus system 230, and the processor 210 is configured to execute instructions stored in the memory 220 to control the input port 240 to receive signals and control the output port 250 to send signals, thereby completing the steps of the network device in the above method. Wherein the input port 240 and the output port 250 may be the same or different physical entities. When they are the same physical entity, they may be collectively referred to as an input-output port. The memory 220 may be integrated in the processor 210 or may be provided separately from the processor 210.

As an implementation manner, the functions of the input port 240 and the output port 250 may be realized by a transceiver circuit or a dedicated chip for transceiving. Processor 210 may be considered to be implemented by a dedicated processing chip, processing circuit, processor, or a general-purpose chip.

As another implementation manner, a manner of using a general-purpose computer to implement the network device provided in the embodiment of the present application may be considered. Program code that implements the functions of the processor 210, the input ports 240 and the output ports 250 is stored in memory, and a general purpose processor implements the functions of the processor 210, the input ports 240 and the output ports 250 by executing the code in the memory.

According to the foregoing method, fig. 13 is a schematic structural diagram of a network device provided in this embodiment of the present application, for example, a schematic structural diagram of a base station. As shown in fig. 13, the base station can be applied to the system shown in fig. 1. The base station includes one or more radio frequency units, such as a Remote Radio Unit (RRU) 201 and one or more baseband units (BBUs) (also referred to as digital units, DUs) 202. The RRU201 may be referred to as a transceiver unit, transceiver circuit, or transceiver, etc., which may include at least one antenna 2011 and a radio unit 2012. The RRU201 is mainly used for transceiving radio frequency signals and converting radio frequency signals and baseband signals, for example, for sending signaling messages described in the above embodiments to user equipment. The BBU202 is mainly used for performing baseband processing, controlling a base station, and the like. The RRU201 and the BBU202 may be physically disposed together or may be physically disposed separately, that is, distributed base stations.

The BBU202 is a control center of a base station, and may also be referred to as a processing unit, and is mainly used for performing baseband processing functions, such as channel coding, multiplexing, modulation, spreading, and the like. For example, the BBU (processing unit) can be used to control the base station to execute the operation flow related to the network device in the above method embodiment.

In an example, the BBU202 may be formed by one or more boards, and the boards may support a radio access network (e.g., an LTE network) of a single access system together, or may support radio access networks of different access systems respectively. The BBU202 also includes a memory 2021 and a processor 2022. The memory 2021 is used to store the necessary instructions and data. The memory 2021 stores, for example, the indication information of the first format or the indication information of the sampling start time in the above-described embodiment. The processor 2022 is configured to control the base station to perform necessary actions, for example, to control the base station to perform the operation procedures related to the network device in the above method embodiments. The memory 2021 and the processor 2022 may serve one or more boards. That is, the memory and processor may be provided separately on each board. Multiple boards may share the same memory and processor. In addition, each single board can be provided with necessary circuits.

According to the method provided by the embodiment of the present application, an embodiment of the present application further provides a communication system, which includes the foregoing network device and one or more than one user equipment.

It should be understood that in the embodiments of the present application, the processor may be a Central Processing Unit (CPU), and the processor may also be other general-purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

The memory may include both read-only memory and random access memory, and provides instructions and data to the processor. The portion of memory may also include non-volatile random access memory.

The bus system may include a power bus, a control bus, a status signal bus, and the like, in addition to the data bus. For clarity of illustration, however, the various buses are labeled as a bus system in the figures.

In implementation, the steps of the above method may be performed by integrated logic circuits of hardware in a processor or instructions in the form of software. The steps of a method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in a processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in a memory, and a processor reads information in the memory and completes the steps of the method in combination with hardware of the processor. To avoid repetition, it is not described in detail here.

It should also be understood that reference herein to first, second, third, fourth, and various numerical designations is made merely for convenience in description and is not intended to limit the scope of embodiments of the invention.

It should be understood that the term "and/or" herein is merely one type of association relationship that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

It should be understood that, in the various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of the processes should be determined by their functions and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.

Those of ordinary skill in the art will appreciate that the various illustrative logical blocks and steps (step) 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 implementation. 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 invention.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed 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 can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

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

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the invention to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website site, computer, server, or data center to another website site, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. an information transmission method, is characterized in that, comprises:

configuring the first format of the first scheduling time unit;

sending the indication information of the first format adopted by the first scheduling time unit;

The symbol set included in the first format and used for carrying the demodulation reference signal partially or completely overlaps with the symbol set included in the second format and used for bearing the demodulation reference signal, and the second format corresponds to the symbol set of another network device. the first scheduling time unit, or, the second scheduling time unit of the network device;

The time length of the first format is smaller than the time length of the second format.

2. The method according to claim 1, wherein the method further comprises:

The indication information of the sampling start time in the first format is sent.

3 . The method according to claim 2 , wherein the indication information of the sampling start time comprises at least one adjustment amount of the sampling start time and an indication of one adjustment amount in the at least one adjustment amount. 4 . value;

The at least one adjustment of the sampling start time is carried in higher layer signaling;

The indication value of one of the at least one adjustment amount is carried in the physical layer signaling.

4. an information transmission method, is characterized in that, comprises:

receiving indication information in the first format adopted by the first scheduling time unit;

determining the first format of the first scheduling time unit according to the indication information of the first format;

The method according to claim 1 or 4, wherein the indication information of the first format is carried in high layer signaling or physical layer signaling.

6 . The method according to claim 5 , wherein the higher layer signaling or the physical layer signaling is a user equipment level or user equipment group level message. 7 .

7 . The method according to claim 5 , wherein the high layer signaling or the physical layer signaling further carries quasi-co-located QCL information corresponding to the first format. 8 .

The method according to claim 1 or 4, wherein the number of symbols included in the first format is n less than the number of symbols included in the second format, where n is an integer greater than or equal to 1.

9. The method according to claim 1 or 4, wherein the subcarrier spacing of the first symbol or the last symbol of the first format is m times the subcarrier spacing of the remaining symbols in the first format, so The m is a rational number greater than 1.

10 . The method according to claim 9 , wherein the indication information of the first format comprises subcarrier spacing information of the first symbol or the last symbol in the first format adopted by the first scheduling unit. 11 .

11. The method according to claim 1 or 4, wherein the indication information in the first format comprises an indication value corresponding to the first format or format group adopted by the first scheduling time unit, and the format group including the first format and the second format;

The indication value is used to indicate one of the optional formats or format groups configured by higher layer signaling or physical layer signaling.

12. The method according to claim 1 or 4, wherein the indication information of the first format comprises a starting symbol position and a number of symbols included in the first format adopted by the first scheduling unit; or the The indication information of the first format includes the starting symbol position and the number of symbols included in each format in the format group adopted by the first scheduling unit, where the format group includes the first format and the second format, and the second format corresponds to In the first scheduling time unit of another network device, or, the second scheduling time unit of the network device, the second scheduling time unit and the first scheduling time unit have the same granularity but different numbers.

13. The method of claim 4, wherein the method further comprises:

The indication information of the sampling start time in the first format is received.

The method according to claim 1 or 4, wherein the sampling start time of the first format is predefined.

15. An information transmission device, comprising: a processor and a memory,

The memory stores instructions that, when executed by the processor, cause the information transmission apparatus to implement the method of any one of claims 1 to 14.