HK40000599B

HK40000599B - Pilot signal transmission method, terminal equipment and network equipment

Info

Publication number: HK40000599B
Application number: HK19123679.3A
Authority: HK
Inventors: 唐海
Original assignee: Oppo 广东移动通信有限公司
Filing date: 2016-07-28
Publication date: 2021-04-23

Description

Method for transmitting pilot signal, terminal equipment and network side equipment

Technical Field

The present invention relates to the field of communications, and in particular, to a method for transmitting a pilot signal, a terminal device, and a network side device.

Background

In a fifth generation mobile communication technology (5G) system, a terminal device is to support transmission at various mobile speeds, specifically including high-speed scenes up to 350km/h and ordinary low-speed scenes. When the moving speed of the terminal equipment is different, the channel change rate is also different. In order to be able to track the channel variations within the coherence time of the channel, the pilot used for signal measurement or signal demodulation needs to have a corresponding density to ensure the accuracy of the channel estimation. For example, at high speeds, a higher pilot density is required to track channel variations; for low speed movement, lower pilot density may be used to reduce overhead. But the problems existing at present are that: the existing technical scheme can not flexibly adjust the pilot frequency density and the physical resources, thereby causing higher pilot frequency overhead. Therefore, it is desirable to provide a solution to this problem.

Disclosure of Invention

The embodiment of the invention provides a method for transmitting pilot signals, terminal equipment and network side equipment, which can flexibly adjust pilot density and physical resources so as to reduce pilot overhead.

In a first aspect, a method for transmitting pilot signals is provided, including:

the terminal equipment determines a first pilot frequency Pattern in a plurality of pilot frequency patterns (Pattern);

the terminal equipment determines a time-frequency resource for transmitting the pilot signal according to the first pilot pattern;

the terminal equipment sends or receives the pilot signal on the time frequency resource.

In the embodiment of the present invention, the terminal device may determine the first pilot pattern in the plurality of pilot patterns, and determine the time-frequency resource for transmitting the pilot signal according to the first pilot pattern, so as to flexibly adjust the density of the pilot and the physical resource occupied by the pilot.

Optionally, the pilot signal may specifically include: reference signals defined by respective versions in LTE, such as Demodulation Reference Signal (DMRS), Cell-specific Reference Signal (CRS), Channel State Information Reference Signal (CSI-RS), Position Reference Signal (PRS), Discovery Reference Signal (DRS), or multicast/multicast Single Frequency Network Reference Signal (MBSFN-RS). Alternatively, the pilot signal may be a reference signal newly defined in 5G.

In the embodiment of the present invention, the pilot pattern indicates a Resource Element (RE) occupied in a certain time domain resource region for transmitting a pilot signal.

Optionally, the plurality of pilot patterns may be predetermined by the terminal device and the network side device in advance, or may be indicated to the terminal device by the network side device. For example, the network side device may indicate the multiple pilot patterns to the terminal device through a higher layer signaling, for example, a Radio Resource Control (RRC) signaling, which is not limited to this.

Optionally, in some possible implementations, before the terminal device determines the first pilot pattern in the plurality of pilot patterns, the method may further include:

the terminal device receives indication information sent by the network device, wherein the indication information is used for indicating the plurality of pilot frequency patterns.

Optionally, in some possible implementations, the plurality of pilot patterns have different pilot resource densities, where the pilot resource densities include a time domain resource density and/or a frequency domain resource density.

Here, the time domain resource density is the number of time domain transmission units spaced between the time domain adjacent pilot resources; the frequency domain resource density is the number of frequency domain transmission units spaced between adjacent pilot frequency resources in the frequency domain. The time domain transmission unit is a basic unit of a time domain physical resource for transmitting a signal, and may be a subframe, a TTI, a slot, an OFDM symbol, or an RE. The frequency domain transmission unit is a basic unit of frequency domain physical resources for transmitting signals, and may be a subcarrier, a PRB, a subband, and the like.

Optionally, in some possible implementations, determining, at the terminal device, a first pilot pattern among the plurality of pilot patterns includes:

the terminal device determines the first pilot pattern in the plurality of pilot patterns according to at least one of the following information:

pilot frequency pattern configuration information sent by network side equipment;

transmission mode information for data transmitted in the same time domain resource or the same frequency domain resource as the pilot signal;

information of a moving speed estimation value of the terminal device;

and basic parameter set information for transmitting the pilot signal or data transmitted in the same time domain resource or the same frequency domain resource as the pilot signal.

Optionally, in some possible implementations, the terminal device determines the first pilot pattern according to a correspondence between the mobile speed estimation value and the pilot pattern. The correspondence may be predetermined by the network side device and the terminal device, or indicated by the network side device.

Optionally, in some possible implementations, the terminal device determines the first pilot pattern according to a correspondence between a transmission mode used for data transmitted in the same time domain resource or the same frequency domain resource as the pilot signal and the pilot pattern. The correspondence may be predetermined by the network side device and the terminal device, or indicated by the network side device.

Optionally, in some possible implementations, the terminal device determines the first pilot pattern according to a corresponding relationship between a set of basic parameters and a pilot pattern, where the set of basic parameters is used for transmitting the pilot signal or data transmitted in the same time domain resource or the same frequency domain resource as the pilot signal. The correspondence may be predetermined by the network side device and the terminal device, or indicated by the network side device.

Optionally, in some possible implementations, the method further includes:

the terminal equipment receives pilot frequency pattern configuration information which is sent by network side equipment and indicated by first Downlink Control Information (DCI), wherein the first DCI is the DCI used for scheduling data transmitted in the same time domain resource or the same frequency domain resource with the pilot frequency signal;

the method for determining the first pilot pattern in the multiple pilot patterns by the terminal device includes:

the terminal device determines the first pilot pattern in a plurality of pilot patterns according to the pilot pattern configuration information indicated by the first DCI.

Optionally, in some possible implementations, before the terminal device determines, according to the pilot pattern configuration information indicated by the first DCI, a first pilot pattern in multiple pilot patterns, the method further includes:

the terminal device reports the estimated moving speed information to the network side device, wherein the estimated moving speed information is used for the network side device to determine the pilot pattern configuration information.

Optionally, in some possible implementations, the base parameter set information includes at least one of the following parameters:

the number of subcarriers in a specific bandwidth, the number of subcarriers in a physical resource block PRB, the length of an orthogonal frequency division multiplexing OFDM symbol, the number of points for fourier transform or inverse fourier transform for generating an OFDM signal, the number of OFDM symbols in a transmission time interval TTI, the number of TTIs included within a predetermined time length, and the length of a signal prefix.

Wherein, the subcarrier spacing refers to the frequency spacing of adjacent subcarriers, such as 15kHz, 60kHz, etc.; the number of subcarriers under a specific bandwidth is, for example, the number of subcarriers corresponding to each possible system bandwidth; the number of subcarriers contained in a PRB may typically be an integer multiple of 12, for example; the number of OFDM symbols contained in a TTI may typically be an integer multiple of 14, for example; the number of TTIs included in a certain time unit may refer to the number of TTIs included in a time length of 1ms or 10 ms; signal prefix length, e.g., the time length of the cyclic prefix of the signal, or whether the cyclic prefix uses normal CP or extended CP.

Optionally, in some possible implementations, after the terminal device determines the first pilot pattern in the multiple pilot patterns, the method further includes:

and the terminal equipment reports the information of the first pilot frequency pattern to network side equipment.

The terminal device may report the information of the first pilot pattern to the network side device through the uplink control channel, so that the network side device may determine the resource location of the pilot signal, thereby performing channel estimation based on the pilot signal.

Optionally, in some possible implementations, the plurality of pilot patterns include a null pilot pattern that represents time-frequency resources not used for transmitting the pilot signal.

For example, when the moving speed of the terminal device is slow, the plurality of pilot patterns may include a null pilot pattern. For example, in 4 pilot patterns, pilot pattern 2 occupies 1 OFDM signal, pilot pattern 3 occupies 2 OFDM signals, pilot pattern 4 occupies 3 OFDM signals, and pilot pattern 1 occupies 0 OFDM signal, where pilot pattern 1 is a null pilot pattern.

In other words, the plurality of pilot patterns includes at least one pilot pattern in which pilot resources are not used. "pilot resources are unused" meaning that no pilot signal needs to be transmitted in the current transmission time unit.

In a second aspect, a method of transmitting pilot signals is provided, including:

the method comprises the steps that a network side device determines a first pilot Pattern in a plurality of pilot patterns (Pattern);

the network side equipment determines a time-frequency resource for transmitting the pilot signal according to the first pilot pattern;

and the network side equipment transmits or receives the pilot signal on the time frequency resource.

In the embodiment of the present invention, the network side device may determine the first pilot pattern in the plurality of pilot patterns, and determine the time-frequency resource for transmitting the pilot signal according to the first pilot pattern, so as to flexibly adjust the density of the pilot and the physical resource occupied by the pilot.

Optionally, the first pilot pattern is used to describe resource elements RE occupied in a certain time domain resource region for transmitting the pilot signal.

Optionally, in some possible implementations, before the network side device determines the first pilot pattern in the multiple pilot patterns, the method may further include:

the network side device sends indication information to the terminal device, wherein the indication information is used for indicating the plurality of pilot frequency patterns.

Optionally, in some possible implementations, the determining, by the network side device, a first pilot pattern in a plurality of pilot patterns includes:

the network side device determines the first pilot pattern in the plurality of pilot patterns according to at least one of the following information:

information of a moving speed estimation value of the terminal device;

Optionally, in some possible implementations, after the network-side device determines the first pilot pattern in the multiple pilot patterns, the method further includes:

the network side equipment sends pilot frequency pattern configuration information indicated by first Downlink Control Information (DCI) to terminal equipment, wherein the first DCI is DCI used for scheduling data transmitted in the same time domain resource or the same frequency domain resource with the pilot frequency signal, and the pilot frequency pattern configuration information is used for indicating the first pilot frequency pattern.

Optionally, in some possible implementations, the method further includes:

the network side equipment receives the estimated value information of the moving speed sent by the terminal equipment;

the method for determining the first pilot pattern in the multiple pilot patterns by the network side equipment includes:

the network side equipment determines the first pilot frequency pattern in the plurality of pilot frequency patterns according to the moving speed estimated value information.

Optionally, in some possible implementations, the method further includes:

and the network side equipment receives the information of the first pilot frequency pattern reported by the terminal equipment.

And the network side equipment determines the resource position of the pilot signal according to the received information of the first pilot pattern, so as to carry out channel estimation based on the pilot signal.

Optionally, in some possible implementations, the plurality of pilot patterns include a null pilot pattern that represents time domain resources not used for transmitting the pilot signal.

In the embodiment of the present invention, the pilot pattern indicates resource elements RE used for transmitting pilot signals.

In a third aspect, a terminal device is provided, configured to perform the method in the first aspect or any possible implementation manner of the first aspect. In particular, the apparatus comprises means for performing the method of the first aspect described above or any possible implementation manner of the first aspect.

In a fourth aspect, a network side device is provided, configured to perform the method in the second aspect or any possible implementation manner of the second aspect. In particular, the apparatus comprises means for performing the method of the second aspect described above or any possible implementation of the second aspect.

In a fifth aspect, a terminal device is provided. The terminal device includes a processor, a memory, and a communication interface. The processor is coupled to the memory and the communication interface. The memory is for storing instructions, the processor is for executing the instructions, and the communication interface is for communicating with other network elements under control of the processor. The processor, when executing the instructions stored by the memory, causes the processor to perform the method of the first aspect or any possible implementation of the first aspect.

In a sixth aspect, a network side device is provided. The network side device includes a processor, a memory, and a communication interface. The processor is coupled to the memory and the communication interface. The memory is for storing instructions, the processor is for executing the instructions, and the communication interface is for communicating with other network elements under control of the processor. The processor, when executing the instructions stored by the memory, causes the processor to perform the second aspect or the method of any possible implementation of the second aspect.

In a seventh aspect, a computer-readable storage medium is provided, which stores a program that causes a terminal device to execute the method for transmitting pilot signals of the first aspect and any of its various implementations.

In an eighth aspect, a computer-readable storage medium is provided, which stores a program that causes a network-side device to execute the method for transmitting a pilot signal according to the second aspect and any one of its various implementations.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.

FIG. 1 is a schematic diagram of an application scenario of an embodiment of the present invention.

Fig. 2 is a schematic flow chart of a method of transmitting pilot signals according to an embodiment of the present invention.

Fig. 3 is a diagram illustrating an example of transmitting a pilot signal according to an embodiment of the present invention.

Fig. 4 is a diagram illustrating another example of transmitting pilot signals according to an embodiment of the present invention.

Fig. 5 is a diagram illustrating still another example of transmitting a pilot signal according to an embodiment of the present invention.

Fig. 6 is another schematic flow chart of a method of transmitting pilot signals according to an embodiment of the present invention.

Fig. 7 is a schematic block diagram of a terminal device according to an embodiment of the present invention.

Fig. 8 is a schematic block diagram of a network side device according to an embodiment of the present invention.

Fig. 9 is a block diagram of a terminal device provided according to still another embodiment of the present invention.

Fig. 10 is a block diagram of a network-side device provided according to still another embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be understood that the technical solutions of the embodiments of the present invention can be applied to various communication systems, for example: global System for Mobile communications (GSM) systems, Code Division Multiple Access (CDMA) systems, Wideband Code Division Multiple Access (WCDMA) systems, General Packet Radio Service (GPRS), Long Term Evolution (Long Term Evolution, LTE) systems, LTE Frequency Division Duplex (FDD) systems, LTE Time Division Duplex (TDD), Universal Mobile Telecommunications System (UMTS), and other current communication systems, and, in particular, future 5G systems.

It should also be understood that, in the embodiment of the present invention, the network-side device may also be referred to as a network device or a Base Station, and the Base Station may be a Base Transceiver Station (BTS) in GSM or CDMA, a Base Station (NodeB) in WCDMA, an evolved Node B (eNB or eNodeB) in LTE, or a Base Station device in a future 5G network, and the present invention is not limited thereto.

It should also be understood that, in the embodiments of the present invention, a terminal device may communicate with one or more Core networks (Core networks) through a Radio Access Network (RAN), and the terminal device may be referred to as an Access terminal, a User Equipment (UE), a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a User terminal, a wireless communication device, a User agent, or a User Equipment. The terminal device may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with Wireless communication capability, a computing device or other processing device connected to a Wireless modem, an in-vehicle device, a wearable device, a terminal device in a future 5G network, and so on.

Fig. 1 is a schematic view of a scene. It should be understood that the scenario in fig. 1 is introduced here as an example for the convenience of understanding, but the present invention is not limited thereto. Terminal device 11, terminal device 12, terminal device 13 and base station 21 are shown in fig. 1.

As shown in fig. 1, terminal device 11 may communicate with base station 21, terminal device 12 may communicate with base station 21, and terminal device 13 may communicate with base station 21. Alternatively, the terminal device 12 may communicate with the terminal device 11. Or, as another case, the terminal device 13 communicates with the base station 12. Here, the terminal device and the base station, or the terminal device and the terminal device, may determine a time-frequency physical resource according to a pilot pattern (pattern), so as to transmit or receive a pilot signal on the time-frequency physical resource. The pilot pattern is used to describe Resource Elements (REs) occupied by the pilot signal in a certain time domain resource region. For example, the pilot signal occupies REs within a Resource range of a Physical Resource Block (PRB) of a subframe. Here, the "pilot signal" may be simply referred to as "pilot".

However, in the existing pilot transmission technology, the selection of the pilot pattern is completely based on the decision of the network side device, and the terminal device cannot select the pilot pattern. In addition, since the 5G system needs to support various speed scenarios of the terminal device, the network side device or the terminal device cannot adaptively select the time-frequency resource required for transmitting the pilot frequency according to the change of various scenarios, and further cannot flexibly adjust the density of the pilot frequency. Therefore, the terminal device or the network side device of the present patent tries to flexibly adjust the density of the pilot and the occupied physical resources according to the current channel state or the change of other transmission parameters.

Fig. 2 shows a schematic flow diagram of a method 200 of transmitting pilot signals according to an embodiment of the invention. The method 200 may be performed by a terminal device, which may be, for example, terminal device 11, terminal device 12, or terminal device 13 in fig. 1. As shown in fig. 2, the method 200 includes:

s210, the terminal equipment determines a first pilot frequency pattern in a plurality of pilot frequency patterns;

specifically, the terminal device may select the first pilot pattern among a plurality of pilot patterns.

In the embodiment of the present invention, the pilot pattern indicates resource elements RE occupied in a certain time domain resource region for transmitting the pilot signal.

Optionally, the pilot signal may specifically include: reference signals defined by respective release in LTE, such as Demodulation Reference Signal (DMRS), Cell-specific Reference Signal (CRS), Channel State Information Reference Signal (CSI-RS), Position Reference Signal (PRS), Discovery Reference Signal (DRS), or multicast/multicast Single Frequency Network Reference Signal (MBSFN-RS). Alternatively, the pilot signal may be a reference signal newly defined in 5G.

Alternatively, the plurality of pilot patterns may be pilot pattern subsets determined by the terminal device or the network device, that is, the terminal device or the network device may determine the pilot pattern subsets in a predetermined pilot pattern set.

It should be understood that the first pilot pattern is a pilot pattern suitable for the terminal device, and the introduction of "first" is merely for convenience of description and does not specifically limit the present invention.

Optionally, before S210, the method may further include:

That is, the terminal device may receive the plurality of pilot patterns transmitted by the network device through the indication information.

S220, the terminal equipment determines a time-frequency resource for transmitting the pilot signal according to the first pilot pattern;

specifically, the terminal device may determine time-frequency physical resources for transmitting pilot signals according to the first pilot pattern.

S230, the terminal device sends or receives the pilot signal on the time-frequency resource.

Specifically, after determining the time-frequency physical resource according to the first pilot pattern, the terminal device may transmit the uplink pilot signal on the time-frequency physical resource, or may receive the downlink pilot signal on the time-frequency physical resource.

Optionally, in this embodiment of the present invention, the plurality of pilot patterns have different pilot resource densities, where the pilot resource densities include a time domain resource density and/or a frequency domain resource density.

Specifically, the time domain resource density is the number of time domain transmission units spaced between pilot frequency resources adjacent to the time domain; the frequency domain resource density is the number of frequency domain transmission units spaced between adjacent pilot frequency resources in the frequency domain. The time domain transmission unit is a basic unit of a time domain physical resource for transmitting a signal, and may be a subframe, a TTI, a slot, an OFDM symbol, or an RE. The frequency domain transmission unit is a basic unit of frequency domain physical resources for transmitting signals, and may be a subcarrier, a PRB, a subband, and the like. For example, the number of OFDM symbols occupied by pilot resources in one subframe is different in different pilot patterns, or the number of subframes occupied by pilot resources in one radio frame is different in different pilot patterns. For another example, the number of subcarriers occupied by the pilot resource in one PRB is different in different pilot patterns, or the number of subcarriers occupied by the pilot resource in one subband is different in different pilot patterns, or the number of subcarriers occupied by the pilot resource in one bandwidth is different in different pilot patterns.

Therefore, for a plurality of pilot frequency patterns with different pilot frequency resource densities, the terminal equipment can select a proper pilot frequency pattern for pilot frequency transmission according to the actual situation of the terminal equipment; or, the network side device may select a suitable pilot pattern for the terminal device according to the actual change condition of the current channel, thereby achieving the purpose of flexibly adjusting the density of the pilot and the occupied physical resources.

Optionally, as an embodiment, S210 may include:

information of a moving speed estimation value of the terminal device;

Specifically, the terminal device may select an appropriate pilot pattern, that is, a first pilot pattern, from the plurality of pilot patterns by using at least one of the above information as a determination factor. In order to more clearly understand how the terminal device can determine the first pilot pattern according to the at least one piece of information, each piece of information in the at least one piece of information will be described in detail below.

Optionally, as an embodiment, for the "pilot pattern configuration information sent by the network side device": specifically, the terminal device may receive pilot pattern configuration information sent by the network side device, where the pilot pattern configuration information is configuration information indicating a first pilot pattern. In other words, the network side device may select an appropriate pilot pattern for the terminal device. The pilot pattern configuration Information may be indicated by the network side device through a high layer signaling, or may also be indicated by the network side device through a Downlink Control Information (DCI) signaling.

Optionally, as an embodiment, the method further includes:

the method for determining the first pilot pattern in the plurality of pilot patterns by the terminal device includes:

Specifically, the terminal device may receive pilot pattern configuration information indicated by the first DCI and transmitted by the network side device, so as to select the first pilot pattern from the multiple pilot patterns according to the pilot pattern configuration information indicated by the first DCI. For example, the network side device indicates the pilot pattern used by the terminal device with 2 bits in the first DCI. The first DCI is a DCI for scheduling data transmitted in the same time domain resource or the same frequency domain resource as the pilot signal. The pilot pattern configuration information is a pilot pattern used for scheduling data transmitted in the same time domain resource or the same frequency domain resource as the pilot signal.

Therefore, the terminal device can determine the first pilot frequency pattern according to the pilot frequency pattern configuration information, so as to flexibly adjust the density of the pilot frequency and the occupied physical resource.

Optionally, as an embodiment, for the "transmission mode information for data transmitted in the same time domain resource or the same frequency domain resource as the pilot signal" described above: specifically, the terminal device may select the first pilot pattern according to a transmission mode for data transmitted in the same time domain resource or the same frequency domain resource as the pilot signal, and a correspondence between the transmission mode and the pilot pattern. The "Time domain resource" may be a Transmission Time unit such as a subframe, a slot, a Transmission Time Interval (TTI), an OFDM symbol, a radio frame, or a newly defined Transmission Time unit in 5G. The "frequency domain resource" may be a subband, a PRB, a Carrier (Carrier), or a bandwidth, etc.

It should be noted that the correspondence between the transmission mode and the pilot pattern may be predetermined by the network side device and the terminal device, or the network side device may directly send indication information to the terminal device, where the indication information is used to indicate the corresponding pilot pattern in different transmission modes. For example, transmission mode a and transmission B correspond to pilot pattern 1 and transmission mode C corresponds to pilot pattern 2.

For example, as a typical application, in a high-speed scenario, the terminal device uses a robust transmission mode such as open-loop-Input-Multiple-Output (MIMO), where the open-loop transmission mode corresponds to a pilot pattern 1; in a low-speed scene, the terminal device uses a transmission mode with higher spectral efficiency, such as closed-loop MIMO, and the like, wherein the closed-loop transmission mode corresponds to the pilot pattern 2.

Therefore, the terminal device can determine the first pilot frequency pattern according to the transmission mode information used by the data transmitted in the same time domain resource or the same frequency domain resource with the pilot frequency signal and the corresponding relation between the transmission mode and the pilot frequency pattern, thereby flexibly adjusting the density of the pilot frequency and the occupied physical resource.

Alternatively, as one embodiment, for "moving speed estimation value information of terminal device": specifically, the terminal device may select the first pilot pattern according to the current estimated moving speed value and the corresponding relationship between the moving speed value and the pilot pattern. In a specific implementation, the terminal device may estimate a moving velocity value based on the transmitted pilot signal or data signal, so as to obtain a current moving velocity estimation value, and then select a first pilot pattern corresponding to the current moving velocity estimation value according to a corresponding relationship between a velocity range of the moving velocity estimation value and the pilot pattern.

It should be noted that the correspondence between the estimated moving speed and the pilot pattern may be predetermined by the network side device and the terminal device, or the network side device may directly send instruction information to the terminal device, where the instruction information is used to instruct the pilot patterns corresponding to different estimated moving speeds. For example, the correspondence between the moving speed range and the pilot pattern may be as shown in table 1:

TABLE 1 correspondence of moving velocity ranges and pilot patterns

Speed of movement	Pilot pattern
		0-3km	Pilot pattern 1
3-30km	Pilot pattern 2
		30-120km	Pilot pattern 3
120-350km	Pilot pattern 4
		Over 350km	Pilot pattern 5

In table 1, when the estimated value of the moving speed of the terminal device is within the range of 0-3km, the corresponding pilot pattern is pilot pattern 1; when the estimated value of the moving speed of the terminal equipment is within the range of 3-30km, the corresponding pilot frequency pattern is a pilot frequency pattern 2; when the estimated value of the moving speed of the terminal equipment is within the range of 30-120km, the corresponding pilot frequency pattern is a pilot frequency pattern 3; when the estimated value of the moving speed of the terminal equipment is within the range of 120-350km, the corresponding pilot pattern is a pilot pattern 4; when the estimated value of the moving speed of the terminal device is above 350km, the corresponding pilot pattern is pilot pattern 5.

Therefore, the terminal equipment can select the first pilot frequency pattern according to the corresponding relation between the estimated value of the moving speed and the pilot frequency pattern under different moving speed scenes, thereby flexibly adjusting the density of the pilot frequency and the occupied physical resource.

Optionally, as an embodiment, for "basic parameter set information for transmitting the pilot signal or data transmitted in the same time domain resource or the same frequency domain resource as the pilot signal": specifically, the terminal device may select the first pilot pattern according to a basic parameter set used for transmitting the pilot signal or data transmitted in the same time domain resource or the same frequency domain resource as the pilot signal, and a correspondence relationship between the basic parameter set and the pilot pattern, or a correspondence relationship between parameters in the basic parameter set and the pilot pattern. Wherein the base parameter set is at least one basic parameter for determining a time domain transmission unit and a frequency domain transmission unit used for transmitting the signal.

It should be noted that the basic parameter set or the corresponding relationship between the parameters in the basic parameter set and the pilot pattern may be predetermined by the network side device and the terminal device; alternatively, the network side device may directly send indication information to the terminal device, where the indication information is used to indicate pilot patterns corresponding to different sets of basic parameters, or the indication information is used to indicate pilot patterns corresponding to parameters in the sets of basic parameters.

For example, when the parameters of the base parameter set include subcarrier spacing, the correspondence between subcarrier spacing and pilot pattern may be as shown in table 2:

TABLE 2 correspondence of subcarrier spacing and pilot pattern

Subcarrier spacing	Pilot pattern
		15kHz	Pilot pattern 1
30kHz	Pilot pattern 2
		60kHz	Pilot pattern 3
120kHz	Pilot pattern 4

In table 2, when the subcarrier spacing is 15kHZ, the corresponding pilot pattern is pilot pattern 1; when the subcarrier interval is 30kHZ, the corresponding pilot frequency pattern is a pilot frequency pattern 2; when the subcarrier interval is 60kHz, the corresponding pilot frequency pattern is a pilot frequency pattern 3; when the subcarrier spacing is 120kHZ, the corresponding pilot pattern is pilot pattern 4.

Alternatively, for another example, when the parameters of the basic parameter set include subcarrier spacing, the correspondence between the subcarrier spacing and the pilot pattern may also be as shown in table 3:

TABLE 3 correspondence of subcarrier spacing and pilot pattern

In table 3, when the subcarrier spacing is 15kHZ, the corresponding pilot pattern subset includes pilot pattern 1 and pilot pattern 2; at a sub-carrier spacing of 30kHZ, the corresponding subset of pilot patterns includes pilot pattern 3 and pilot pattern 4.

Wherein table 2 differs from table 3 in that: one subcarrier spacing in table 2 corresponds to one pilot pattern, and one subcarrier spacing in table 3 may correspond to a plurality of pilot patterns. In other words, each subcarrier spacing in table 3 may correspond to a subset of pilot patterns that includes multiple pilot patterns.

Therefore, the terminal equipment can determine the first pilot frequency pattern according to the basic parameter set or the corresponding relation between the parameters in the basic parameter set and the pilot frequency pattern, thereby flexibly adjusting the density of the pilot frequency and the occupied physical resources.

It should be understood that the above description is only given by taking the corresponding relations of table 1-table 3 as examples, and actually not limited thereto.

Optionally, as another embodiment, the basic parameter set includes at least one of the following parameters:

the number of subcarriers in a specific bandwidth, the number of subcarriers in a physical resource block PRB, the length of an orthogonal frequency division multiplexing OFDM symbol, the number of points for fourier transform or inverse fourier transform for generating an OFDM signal, the number of OFDM symbols in a transmission time interval TTI, the number of TTIs included in a specific time length, and the length of a signal prefix.

In summary, the terminal device may determine the first pilot pattern according to at least one of the information described above. It should be noted that, part of the at least one information may be used in combination. For example, the pilot pattern configuration information transmitted by the network side device is combined with the moving speed estimation value information of the terminal device. An embodiment in which pilot pattern configuration information is used in combination with the moving speed estimation value information of the terminal device will be described below.

Optionally, as an embodiment, before the terminal device determines, according to the pilot pattern configuration information indicated by the first DCI, a first pilot pattern in multiple pilot patterns, the method 200 further includes:

Specifically, the terminal device may report its own moving speed estimation value to the network side device, so that the network side device determines the pilot pattern used by the terminal device according to the moving speed estimation value. In other words, the network side device may determine the pilot pattern configuration information according to the estimated moving speed of the terminal device, and indicate the pilot pattern configuration information through a downlink instruction (e.g., the first DCI). Here, the terminal device may quantize the estimated moving speed and report the quantized estimated moving speed to the network side device.

It should be noted that the network side device may know the transmission mode information or the basic parameter set information of the terminal device, and for the estimated value of the moving speed of the terminal device, the terminal device needs to report the estimated value to the terminal device.

Optionally, as an embodiment, after S210, the method 200 may further include:

Specifically, the terminal device may report information of the first pilot pattern to the network side device through the uplink control channel, so that the network side device determines a resource location of the pilot signal according to the first pilot pattern, and thus the network side device performs channel estimation based on the pilot signal.

Optionally, as an embodiment, the plurality of pilot patterns include a null pilot pattern indicating time-frequency resources not used for transmitting the pilot signal.

Specifically, in the embodiment of the present invention, the pilot resource corresponding to at least one of the plurality of pilot patterns is not used, that is, it indicates that no pilot signal needs to be transmitted in the current transmission time unit. For example, when the moving speed of the terminal device is slow, the plurality of pilot patterns may include a null pilot pattern. For example, in 4 pilot patterns, pilot pattern 2 occupies 1 OFDM signal, pilot pattern 3 occupies 2 OFDM signals, pilot pattern 4 occupies 3 OFDM signals, and pilot pattern 1 occupies 0 OFDM signal, where pilot pattern 1 is a null pilot pattern.

Therefore, in the method for transmitting pilot signals according to the embodiment of the present invention, the terminal device may determine the first pilot pattern in the plurality of pilot patterns, and determine the time-frequency resource for transmitting the pilot signals according to the first pilot pattern, so as to flexibly adjust the density of the pilot and the physical resource occupied by the pilot.

In order to facilitate those skilled in the art to understand the technical solution of the present invention, the embodiments of the present invention will be described below by way of example in connection with DMRS pilot signals and CSI-RS pilot signals. It will be understood that this is not a limitation of the invention.

For example, as shown in fig. 3, the method specifically includes the following steps:

s301, the terminal device 30 and the network side device 31 agree on a plurality of pilot patterns used by the downlink DMRS.

The pilot patterns agreed by the terminal device 30 and the network side device 31 are respectively a pilot pattern 1, a pilot pattern 2, a pilot pattern 3, and a pilot pattern 4, where the pilot pattern 1 does not have any pilot RE, the pilot signals in the pilot patterns 2-4 respectively occupy 1, 2, and 3 OFDM symbols, and the pilot pattern 1 does not need to transmit pilot signals.

Optionally, S302, the network side device 31 determines a pilot pattern used by the terminal.

The network side device 31 may select an appropriate DMRS pilot pattern for the terminal device 30 according to the change condition of the current channel. For example, when the channel changes faster, a pilot pattern occupying more OFDM symbols is selected, and when the channel changes slower, a pilot pattern occupying less OFDM symbols is selected.

S303, the terminal device 30 determines the used pilot pattern.

Specifically, the terminal device 30 may select an appropriate pilot pattern among the plurality of pilot patterns. For example, the pilot pattern is determined by combining information such as a current mobility value of the terminal device 30, a transmission mode used for data transmitted in the same time domain resource or the same frequency domain resource as the downlink DMRS signal, a base parameter set of the downlink DMRS signal, and a base parameter set used for data transmitted in the same time domain resource or the same frequency domain resource as the downlink DMRS signal.

Optionally, in S304, the network side device 31 issues a downlink control signaling DCI.

Optionally, the network side device 31 may schedule downlink data transmission of the terminal device 30 through downlink control signaling DCI. And, the DMRS pilot pattern used by the terminal device 30 is indicated by 2 bits in the DCI.

S305, the terminal device 30 determines a physical resource used by the downlink DMRS.

The terminal device 30 may determine the physical resource used by the downlink DMRS according to the pilot pattern selected by the terminal device. Optionally, when receiving the DCI, the terminal device 30 may also determine, according to the DMRS pilot pattern indicated by the DCI, a physical resource used by the downlink DMRS.

S306, the terminal device 30 transmits the downlink DMRS.

The terminal device 30 receives the downlink DMRS for demodulating the downlink data on the physical resource, so as to perform downlink channel estimation according to the received downlink DMRS, thereby demodulating the downlink data. The downlink data and the downlink DMRS signal transmitted by the network side device 31 to the terminal device 30 are in the same subframe.

Therefore, in this example, the terminal device 30 may determine, according to the pilot pattern indicated by the network-side device 31, a physical resource for transmitting the downlink DMRS, so as to transmit the downlink DMRS.

For another example, as shown in fig. 4, the method specifically includes the following steps for the uplink DMRS:

s401, the terminal device 40 and the network side device 41 agree on a pilot pattern set of the uplink DMRS.

The terminal device 40 and the network side device 41 may define a pilot pattern set that may be used by the uplink DMRS, where the pilot pattern set includes 4 pilot patterns, and the 4 pilot patterns have different pilot resource densities.

S402, the network side device 41 determines a pilot pattern subset used by the terminal device 40.

The network side device 41 may also determine a subset of pilot patterns used for the terminal device 40 in the set of pilot patterns, for example, the subset of pilot patterns includes pilot pattern 2 and pilot pattern 4. The network side device 41 may determine the pilot pattern subset according to the variation of the channel. For example, when the channel changes faster, a pilot pattern occupying more OFDM symbols is selected, and when the channel changes slower, a pilot pattern occupying less OFDM symbols is selected. As another example, the network side device 41 may adjust the subset of pilot patterns according to previous channel estimation performance.

S403, the network device 41 issues an RRC signaling.

The network side device 41 may inform the terminal device 40 of the determined subset of pilot patterns through RRC signaling. In a specific implementation, the network side device 41 may indicate a currently available pilot pattern subset in the agreed pilot pattern set to the terminal device 40 by using the method of the identification value bitmap, so that the terminal device 40 selects an appropriate pilot pattern in the pilot pattern subset.

S404, the terminal device 40 determines the used pilot pattern.

Specifically, the terminal device 40 may select an appropriate pilot pattern in the pilot pattern subset by itself. For example, the terminal device 40 selects an appropriate pilot pattern according to information such as a current mobility value, a transmission mode used for data transmitted in the same time domain resource or the same frequency domain resource as the uplink DMRS signal, a base parameter set of the uplink DMRS signal, and a base parameter set used for data transmitted in the same time domain resource or the same frequency domain resource as the uplink DMRS signal. For example, the terminal device 40 selects a pilot pattern based on the current moving speed estimation value, selects a pilot pattern 2 when the moving speed estimation value is less than a, and selects a pilot pattern 4 when the moving speed estimation value is greater than or equal to a.

Alternatively, the terminal device 40 selects an appropriate pilot pattern from the pilot pattern subset according to the received RRC signaling, wherein the RRC signaling indicates the pilot pattern subset.

S405, the terminal device 40 determines a physical resource used by the uplink DMRS.

The terminal device 40 may determine, according to the pilot pattern selected by itself, a physical resource used by the uplink DMRS, and then transmit the uplink DMRS on the physical resource, where the uplink DMRS is used to demodulate uplink data.

S406, the terminal device 40 transmits the uplink DMRS.

The terminal device 40 transmits an uplink DMRS for demodulating uplink data on the physical resource. The downlink data and the downlink DMRS signal transmitted by the network side device 41 to the terminal device 40 are in the same subframe.

S407, the terminal device 40 transmits, to the network side device 41, indication information indicating a pilot pattern of the uplink DMRS.

The terminal device 40 selects the pilot pattern of the uplink DMRS in the pilot pattern subset by itself, and feeds back the selected pilot pattern to the network side device 41 together with the uplink data.

S408, the network device 41 determines the location of the physical resource of the uplink DMRS.

The network side device 41 determines the position corresponding to the physical resource corresponding to the pilot pattern of the uplink DMRS according to the indication information sent by the terminal device 40.

S409, the network device 41 receives the uplink DMRS.

Specifically, the network side device 41 receives the uplink DMRS on the physical resource according to the determined physical resource, performs uplink channel estimation based on the uplink DMRS, and demodulates uplink data according to a result of the uplink channel estimation.

Therefore, in this example, the terminal device 40 may determine an appropriate pilot pattern in the pilot pattern subset, and determine, according to the pilot pattern, a physical resource for transmitting the uplink DMRS, so as to transmit the uplink DMRS.

For another example, as shown in fig. 5, the CSI-RS specifically includes the following steps:

s501, the terminal device 50 and the network side device 51 define a pilot pattern set of the CSI-RS.

For example, the set of pilot patterns includes N pilot patterns. Alternatively, the set of pilot patterns may be defined in the protocol.

S502, the terminal device 50 determines a pilot pattern subset for transmitting CSI-RS.

Specifically, the terminal device 50 may determine, according to the currently used basic parameter set, a pilot pattern subset corresponding to the basic parameter set from the N pilot patterns. For example, the subset of pilot patterns includes M pilot patterns, where M is less than or equal to N. The basic parameter set may be configured by the network side device 51 to the terminal device 50 through other signaling.

Optionally, S503, the network side device 51 may also determine a pilot pattern subset for transmitting the CSI-RS.

S504, the terminal device 50 determines a pilot pattern used for transmitting the CSI-RS in the pilot pattern subset of the CSI-RS.

The terminal device 50 may determine the pilot pattern used for transmitting the CSI-RS according to the corresponding relationship between the basic parameter set and the pilot pattern in the pilot pattern subset. The correspondence between the basic parameter set and the pilot pattern may be predefined by the network side device 51 and the terminal device 50, for example, the correspondence is defined in a protocol.

Optionally, S505, the network side device 51 may also determine a pilot pattern used for transmitting the CSI-RS.

Optionally, S506, the network side device 51 issues RRC signaling.

The network side device 51 indicates the pilot pattern of the CSI-RS used by the terminal device 50 through the RRC signaling sent to the terminal device 50. Wherein the RRC signaling includes log2(M) (rounded up) bits.

S507, the terminal device 50 determines physical resources for transmitting the CSI-RS according to the pilot frequency pattern for transmitting the CSI-RS.

Terminal device 50 may determine the physical resources for subsequent CSI-RS transmission according to the pilot pattern of the CSI-RS indicated by the RRC signaling. Alternatively, the terminal device 50 may determine the physical resource for transmitting the CSI-RS subsequently according to the pilot pattern selected by itself.

S508, the terminal device 50 receives the CSI-RS on the physical resource.

Terminal device 50 receives the subsequent CSI-RS on the physical resource according to the determined physical resource, and performs downlink CSI measurement based on the received CSI-RS.

Therefore, in this example, the terminal device 50 may determine an appropriate pilot pattern in the pilot pattern subset, and determine a physical resource for transmitting the CSI-RS according to the pilot pattern, so as to receive the uplink CSI-RS.

It should be understood that the schematic diagrams in fig. 3 to 5 are only for facilitating understanding of the technical solution of the present invention, and do not limit the present invention.

It should also be understood that, in various embodiments of the present invention, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

The method of transmitting a pilot signal according to an embodiment of the present invention has been described from the terminal apparatus in the foregoing, and the method of transmitting a pilot signal according to an embodiment of the present invention will be described from the network-side apparatus in the following.

Fig. 6 shows a schematic flow diagram of a method 600 of transmitting pilot signals according to an embodiment of the invention. The method 600 is performed by a network side device. For example, the network side device may be the base station 21 in fig. 1. As shown in fig. 6, the method 600 includes:

s610, the network side equipment determines a first pilot frequency pattern in a plurality of pilot frequency patterns;

s620, the network side equipment determines a time frequency resource for transmitting the pilot signal according to the first pilot pattern;

s630, the network side device sends or receives the pilot signal on the time-frequency resource.

In the embodiment of the present invention, the network side device may determine a first pilot pattern in the multiple pilot patterns, then determine a time-frequency resource for transmitting the pilot signal according to the first pilot pattern, and send or receive the pilot signal on the time-frequency resource, so that pilot density and physical resources can be flexibly adjusted, thereby reducing pilot overhead.

For brevity, some similar terms or actions in the network side device and the terminal device will not be described in detail.

Optionally, the plurality of pilot patterns have different pilot resource densities, wherein the pilot resource densities include a time domain resource density and/or a frequency domain resource density.

Optionally, as an embodiment, the determining, by the network side device, a first pilot pattern in the multiple pilot patterns includes:

information of a moving speed estimation value of the terminal device;

Optionally, as an embodiment, after S610, the method 600 further includes:

the network side device sends pilot pattern configuration information indicated by first Downlink Control Information (DCI) to a terminal device, wherein the first DCI is DCI used for scheduling data transmitted in the same time domain resource or the same frequency domain resource as the pilot signal, and the pilot pattern configuration information is used for indicating the first pilot pattern.

Optionally, as an embodiment, the method 600 further includes:

wherein, S610 includes:

Specifically, the network side device may determine the first pilot pattern according to the estimated value of the moving speed reported by the terminal device.

Optionally, as an embodiment, the method 600 further includes:

Specifically, the network side device may determine a resource location of a pilot signal according to the received information of the first pilot pattern, so as to perform channel estimation based on the pilot signal.

Optionally, as an embodiment, the plurality of pilot patterns include null pilot patterns indicating time-frequency resources not used for transmitting the pilot signal.

Optionally, as an embodiment, the method 600 further includes;

Optionally, the first pilot pattern represents resource elements RE used for transmitting the pilot signal.

Therefore, in the method for transmitting the pilot signal according to the embodiment of the present invention, the network side device can determine the first pilot pattern from the plurality of pilot patterns according to the channel state or other transmission parameters, so as to flexibly adjust the density of the pilot and the occupied physical resources.

Having described the method of transmitting pilot signals according to an embodiment of the present invention in detail above, a terminal device and a network side device according to an embodiment of the present invention will be described below.

Fig. 7 shows a schematic block diagram of a terminal device 700 according to an embodiment of the invention. As shown in fig. 7, the terminal device 700 includes:

a determining module 710 for determining a first pilot pattern among a plurality of pilot patterns;

the determining module 710 is further configured to determine a time-frequency resource for transmitting the pilot signal according to the first pilot pattern;

a transmission module 720, configured to transmit or receive the pilot signal on the time-frequency resource determined by the determination module.

In the embodiment of the invention, the terminal equipment can determine the first pilot frequency pattern in the plurality of pilot frequency patterns, and determine the time frequency resource for transmitting the pilot frequency signal according to the first pilot frequency pattern, so that the density and the occupied physical resource of the pilot frequency can be flexibly adjusted.

Optionally, as an embodiment, the determining module 710 is specifically configured to:

determining the first pilot pattern among the plurality of pilot patterns according to at least one of the following information:

information of a moving speed estimation value of the terminal device;

Optionally, as an embodiment, the terminal device further includes:

a receiving module, configured to receive pilot pattern configuration information indicated by first downlink control information DCI sent by a network side device, where the first DCI is DCI used to schedule data transmitted in a same time domain resource or a same frequency domain resource as the pilot signal;

the determining module 710 is specifically configured to:

determining the first pilot pattern among a plurality of pilot patterns according to the pilot pattern configuration information indicated by the first DCI.

Optionally, as an embodiment, the transmission module 720 is further configured to:

and reporting the estimated moving speed information to the network side equipment, wherein the estimated moving speed information is used for the network side equipment to determine the pilot pattern configuration information.

Optionally, as an embodiment, the base parameter set information includes at least one of the following parameters:

and reporting the information of the first pilot frequency pattern to network side equipment.

and receiving indication information sent by the network equipment, wherein the indication information is used for indicating the plurality of pilot patterns.

In the embodiment of the present invention, the pilot pattern indicates resource elements RE used for transmitting the pilot signal.

The terminal device 700 according to the embodiment of the present invention may execute the method 200 for transmitting a pilot signal according to the embodiment of the present invention, and the above and other operations and/or functions of each module in the apparatus 700 are respectively for implementing corresponding processes of the foregoing methods, and are not described herein again for brevity.

Therefore, the terminal device of the embodiment of the present invention may determine the first pilot pattern in the plurality of pilot patterns, and determine the time-frequency resource for transmitting the pilot signal according to the first pilot pattern, so as to flexibly adjust the density of the pilot and the physical resource occupied by the pilot.

The terminal device according to the embodiment of the present invention is described above with reference to fig. 7, and the network side device according to the embodiment of the present invention is described below with reference to fig. 8.

Fig. 8 shows a schematic block diagram of a network side device 800 according to an embodiment of the invention. As shown in fig. 8, the network-side device 800 includes:

a determining module 810 for determining a first pilot pattern among a plurality of pilot patterns;

the determining module 810 is further configured to determine a time-frequency resource for transmitting the pilot signal according to the first pilot pattern;

a transmission module 820 configured to transmit or receive the pilot signal on the time-frequency resource.

The network side equipment of the embodiment of the invention can determine the first pilot frequency pattern in the plurality of pilot frequency patterns, and determine the time frequency resource for transmitting the pilot frequency signal according to the first pilot frequency pattern, thereby flexibly adjusting the density of the pilot frequency and the occupied physical resource.

Optionally, as an embodiment, the determining module 810 is specifically configured to:

information of a moving speed estimation value of the terminal device;

Optionally, as an embodiment, the transmission module 820 is further configured to:

and sending pilot pattern configuration information indicated by first Downlink Control Information (DCI) to the terminal equipment, wherein the first DCI is DCI used for scheduling data transmitted in the same time domain resource or the same frequency domain resource as the pilot signal, and the pilot pattern configuration information is used for indicating the first pilot pattern.

receiving the estimated value information of the moving speed sent by the terminal equipment;

the determining module 810 is configured to determine the first pilot pattern in the plurality of pilot patterns according to the mobile speed estimation value information.

and sending indication information to the terminal equipment, wherein the indication information is used for indicating the plurality of pilot frequency patterns.

The network side device 800 according to the embodiment of the present invention may execute the method 600 for transmitting a pilot signal according to the embodiment of the present invention, and the above and other operations and/or functions of each module in the network side device 800 are respectively to implement corresponding flows of the foregoing methods, and are not described herein again for brevity.

Therefore, the network side device of the embodiment of the invention can determine the first pilot frequency pattern in the plurality of pilot frequency patterns, and determine the time frequency resource for transmitting the pilot frequency signal according to the first pilot frequency pattern, so that the density and the occupied physical resource of the pilot frequency can be flexibly adjusted.

Fig. 9 shows a structure of a device of a terminal apparatus according to another embodiment of the present invention, which includes at least one processor 902 (e.g., a CPU), at least one network interface 905 or other communication interface, a memory 906, and at least one communication bus 903 for implementing connection communication between these devices. The processor 902 is configured to execute executable modules, such as computer programs, stored in the memory 906. The Memory 906 may comprise a high-speed Random Access Memory (RAM) and may also include a non-volatile Memory (non-volatile Memory), such as at least one disk Memory. The communication connection with at least one other network element is realized through at least one network interface 905 (which may be wired or wireless).

In some embodiments, the memory 906 stores a program 9061, and the processor 902 executes the program 9061, so as to perform the method for transmitting a pilot signal on the terminal device side in the foregoing embodiment of the present invention, which is not described herein for brevity.

Fig. 10 shows a structure of a device of a network side apparatus according to another embodiment of the present invention, which includes at least one processor 1002 (e.g., CPU), at least one network interface 1005 or other communication interface, a memory 1006, and at least one communication bus 1003, for implementing connection communication between these devices. The processor 1002 is configured to execute executable modules, such as computer programs, stored in the memory 1006. The Memory 1006 may comprise a high-speed Random Access Memory (RAM), and may also include a non-volatile Memory (non-volatile Memory), such as at least one disk Memory. The communication connection with at least one other network element is realized through at least one network interface 1005 (which may be wired or wireless).

In some embodiments, the memory 1006 stores the program 10061, and the processor 1002 executes the program 10061 for executing the method of the network side device for transmitting pilot signals according to the foregoing embodiment of the present invention, which is not described herein for brevity.

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 various embodiments of the present invention, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the 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.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

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 claims.

Claims

1. A method for transmitting a pilot signal, comprising:

the terminal equipment receives indication information, wherein the indication information is used for indicating a plurality of pilot frequency patterns;

the terminal equipment receives pilot frequency pattern configuration information indicated by first Downlink Control Information (DCI), wherein the first DCI is used for scheduling data transmitted in the same time domain resource with the pilot frequency signal; wherein the pilot pattern configuration information is used for indicating a pilot pattern of data transmitted in the same time domain resource as the pilot signal;

the terminal equipment determines a first pilot pattern in the plurality of pilot patterns according to the pilot pattern configuration information indicated by the first DCI;

and the terminal equipment sends or receives the pilot signal on the time frequency resource.

2. The method of claim 1, wherein the plurality of pilot patterns have different pilot resource densities, and wherein the pilot resource densities comprise time domain resource densities and/or frequency domain resource densities.

3. The method of claim 1 or 2, wherein before the terminal device determines a first pilot pattern among the plurality of pilot patterns according to the pilot pattern configuration information indicated by the first DCI, the method further comprises:

and the terminal equipment reports the estimated value information of the moving speed, wherein the estimated value information of the moving speed is used for the network side equipment to determine the pilot frequency pattern configuration information.

4. The method of claim 1, wherein after the terminal device determines a first pilot pattern among the plurality of pilot patterns, the method further comprises:

and the terminal equipment reports the information of the first pilot frequency pattern.

5. The method of claim 1, wherein the plurality of pilot patterns comprise null pilot patterns, the null pilot patterns representing time-frequency resources not used for transmission of the pilot signals.

6. A method for transmitting a pilot signal, comprising:

the method comprises the steps that network side equipment sends indication information, wherein the indication information is used for indicating a plurality of pilot frequency patterns;

the network side equipment determines a first pilot pattern in the plurality of pilot patterns;

the network side equipment sends pilot frequency pattern configuration information indicated by first Downlink Control Information (DCI), wherein the first DCI is DCI used for scheduling data transmitted in the same time domain resource with the pilot frequency signal, and the pilot frequency pattern configuration information is used for indicating the first pilot frequency pattern; the pilot pattern configuration information is used for indicating a pilot pattern of data transmitted in the same time domain resource with the pilot signal;

and the network side equipment sends or receives the pilot signal on the time frequency resource.

7. The method of claim 6, wherein the plurality of pilot patterns have different pilot resource densities, and wherein the pilot resource densities comprise time domain resource densities and/or frequency domain resource densities.

8. The method according to claim 6 or 7, characterized in that the method further comprises:

the network side equipment receives the estimated value information of the moving speed;

wherein, the network side device determines a first pilot pattern in a plurality of pilot patterns, and the determining comprises:

and the network side equipment determines the first pilot frequency pattern in the plurality of pilot frequency patterns according to the moving speed estimated value information.

9. The method of claim 6, further comprising:

and the network side equipment receives the information of the first pilot frequency pattern.

10. The method of claim 6, wherein the plurality of pilot patterns comprise null pilot patterns, the null pilot patterns representing time domain resources not used for transmitting the pilot signal.

11. A terminal device, comprising:

a transmission module, configured to receive indication information, where the indication information is used to indicate a plurality of pilot patterns;

a receiving module, configured to receive pilot pattern configuration information, which is sent by a network side device and indicated by first downlink control information DCI, where the first DCI is a DCI used to schedule data transmitted in the same time domain resource as a pilot signal; wherein the pilot pattern configuration information is used for indicating a pilot pattern of data transmitted in the same time domain resource as the pilot signal;

a determining module, configured to determine a first pilot pattern in the plurality of pilot patterns according to the pilot pattern configuration information indicated by the first DCI;

the determining module is further configured to determine, according to the first pilot pattern, a time-frequency resource for transmitting the pilot signal;

the transmission module is configured to send or receive the pilot signal on the time-frequency resource determined by the determination module.

12. The terminal device of claim 11, wherein the plurality of pilot patterns have different pilot resource densities, and wherein the pilot resource densities comprise time domain resource densities and/or frequency domain resource densities.

13. The terminal device according to claim 11 or 12, wherein the transmission module is further configured to:

and reporting the information of the estimated value of the moving speed, wherein the information of the estimated value of the moving speed is used for the network side equipment to determine the configuration information of the pilot frequency pattern.

14. The terminal device of claim 11, wherein the transmission module is further configured to:

and reporting the information of the first pilot frequency pattern.

15. The terminal device of claim 11, wherein the plurality of pilot patterns comprise null pilot patterns, and wherein the null pilot patterns represent time-frequency resources not used for transmitting the pilot signals.

16. A network-side device, comprising:

a transmission module, configured to send indication information, where the indication information is used to indicate a plurality of pilot patterns;

a determining module configured to determine a first pilot pattern among the plurality of pilot patterns;

the transmission module is further configured to send, to a terminal device, pilot pattern configuration information indicated by first downlink control information DCI, where the first DCI is DCI used to schedule data transmitted in the same time domain resource as a pilot signal, and the pilot pattern configuration information is used to indicate the first pilot pattern; the pilot pattern configuration information is used for indicating a pilot pattern of data transmitted in the same time domain resource with the pilot signal;

and the transmission module is used for transmitting or receiving the pilot signal on the time frequency resource.

17. The network-side device of claim 16, wherein the plurality of pilot patterns have different pilot resource densities, and wherein the pilot resource densities comprise time domain resource densities and/or frequency domain resource densities.

18. The network-side device of claim 16 or 17, wherein the transmission module is further configured to:

receiving moving speed estimated value information;

wherein the determining module is configured to determine the first pilot pattern in the plurality of pilot patterns according to the estimated moving speed information.

19. The network-side device of claim 16, wherein the transmission module is further configured to:

information of the first pilot pattern is received.

20. The network-side device of claim 16, wherein the plurality of pilot patterns comprise null pilot patterns, and wherein the null pilot patterns represent time domain resources not used for transmitting the pilot signals.