Phase compensation method and communication device

Abstract

The invention provides a phase compensation method and a communication device, which can improve the precision of phase compensation and can be applied to a communication system. The method comprises: a terminal receiving at least two reference signal sets; wherein each reference signal set in the at least two reference signal sets comprises at least one reference signal. And the terminal sends the first information according to the at least two reference signal sets. The first information is used for indicating the corresponding phase variation between the reference signal sets in the at least two reference signal sets at the first moment.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a phase compensation method and a communication device. Background Art

[0002] In the scenario of coherent joint transmission (CJT), multiple network devices can work together to provide services for the same terminal. The signals sent by multiple network devices are coherently superimposed at the terminal, and the interference is coherently canceled at the terminal, thereby improving the signal-to-noise ratio. In an actual communication system, if the clock sources of each of the multiple network devices are different, a phase offset (also called phase shift) will be generated between the signals sent by the multiple network devices. In this way, the signals sent by the multiple network devices cannot be completely coherently superimposed at the terminal, and the interference cannot be completely coherently canceled, thereby affecting the transmission effect.

[0003] Therefore, when multiple network devices with different clock sources work together to provide services to terminals, how to improve the CJT transmission effect is an urgent problem to be solved. Summary of the invention

[0004] The embodiments of the present application provide a phase compensation method and a communication device, which can improve the accuracy of phase compensation.

[0005] In order to achieve the above objectives, this application adopts the following technical solutions:

[0006] In a first aspect, a phase compensation method is provided. The phase compensation method includes: a terminal receives at least two reference signal sets. Each of the at least two reference signal sets includes at least one reference signal. The terminal sends first information according to the at least two reference signal sets. The first information is used to indicate the corresponding phase change amount between the reference signal sets in the at least two reference signal sets at a first moment.

[0007] Based on the phase compensation method provided in the first aspect, the terminal can perform phase measurement according to at least two reference signal sets, and send the corresponding phase change amount between the reference signal sets in at least two reference signal sets at the first moment, that is, the phase change amount between multiple network devices providing services to the terminal in a collaborative scenario. At different moments, the phase change amount between the multiple network devices provided by the terminal may be different. The network device can perform phase compensation on the downlink signal in combination with the corresponding phase change amount between the reference signal sets in at least two reference signal sets at the first moment reported by the terminal, thereby improving the accuracy of the phase compensation and improving the CJT transmission effect.

[0008] In a possible design, the phase change amount corresponding between the reference signal sets in at least two reference signal sets includes: the phase change amount corresponding between the first reference signal set and the second reference signal set. Among them, the second reference signal set is a preset reference signal set in at least two reference signal sets, and the first reference signal set is any one of the at least two reference signal sets other than the second reference signal set. That is to say, the phase change amount corresponding between two reference signal sets can be calculated based on a preset reference signal set in at least two reference signal sets. In this way, when the number of reference signal sets is greater than or equal to three, the complexity of the first information can be simplified, thereby reducing resource overhead.

[0009] In a possible design, the phase change amount corresponding between the reference signal sets in at least two reference signal sets includes: the phase change amount corresponding between the i-th reference signal set and the (i + 1)-th reference signal set in at least two reference signal sets. i is an integer, and 1 ≤ i < I. Among them, I is the total number of reference signal sets in at least two reference signal sets.

[0010] In a possible design, the phase change amount corresponding between the reference signal sets in at least two reference signal sets is related to the index of the frequency domain unit. In this way, the phase change amount corresponding between the reference signal sets in at least two reference signal sets can be obtained for different frequency domain units respectively, thereby further improving the phase compensation accuracy.

[0011] Optionally, the phase change amount at the first moment and the index of the frequency domain unit satisfy a linear relationship. This can simplify the reporting complexity of the phase change amount at the first moment and reduce the feedback overhead.

[0012] Furthermore, the phase change amount at the first moment and the index of the frequency domain unit satisfy the relationship shown as follows: P1 = 2πρ + 2πkσ. Among them, P1 is the phase change amount at the first moment, k is the index of the frequency domain unit, k is a positive integer greater than or equal to 0, ρ is a constant, and σ is a constant.

[0013] In a possible design, the reference signal is a channel state information reference signal CSI-RS.

[0014] Optionally, the first moment is the end position of the last reference signal set before the channel state information CSI reference resource in at least two reference signal sets. Or, the first moment is the time domain position corresponding to the CSI reference resource. Or, the first moment is the starting moment of reporting the first information. Or, the first moment is a moment after the starting moment of reporting the first information, and the time length between the first moment and the moment of reporting the first information is the first time length.

[0015] In a possible design, reference signals of each reference signal set in at least two reference signal sets are carried on reference signal resources of the same reference signal resource set, wherein the reference signal resource set includes multiple reference signal resources.

[0016] Optionally, among the multiple reference signal resources in the reference signal resource set, the ports corresponding to the same port index are the same. And / or, the multiple reference signal resources in the reference signal resource set are quasi-co-located. In this way, the accuracy of the phase shift measured by the terminal can be improved, thereby further improving the accuracy of the phase compensation.

[0017] In a possible design, reference signals of different reference signal sets in at least two reference signal sets are respectively carried on reference signal resources of different reference signal resource sets, wherein the reference signal resource set includes one reference signal resource.

[0018] In a possible design, reference signals of each reference signal set in at least two reference signal sets are carried on reference signal resources of multiple reference signal resource sets.

[0019] Optionally, there is at least one reference signal resource with the same resource identifier in each of the multiple reference signal resource sets.

[0020] Alternatively, optionally, the reference signal resources in the multiple reference signal resource sets are arranged based on the order of resource identifiers, and the ports corresponding to the same port index of the reference signal resources with the same arrangement order in different reference signal resource sets are the same, and / or the reference signal resources with the same arrangement order in different reference signal resource sets are quasi-co-located. In this way, the accuracy of the phase shift measured by the terminal can be improved, thereby further improving the accuracy of the phase compensation.

[0021] In a possible design, the reference signals of each reference signal set in at least two reference signal sets are carried on reference signal resources of the same reference signal resource set, wherein the reference signal resource set includes multiple reference signal resources, and reference signals of different reference signal sets are carried on different reference signal resources.

[0022] In a second aspect, a phase compensation method is provided. The phase compensation method includes: a network device sends a reference signal set to a terminal. The reference signal set includes at least one reference signal. The network device receives first information sent by the terminal according to at least two reference signal sets, and the first information is used to indicate the corresponding phase change amount between the reference signal sets in the at least two reference signal sets at a first moment.

[0023] Based on the phase compensation method provided in the second aspect, the network device can send a set of reference signals and receive the first information fed back by the terminal according to the set of reference signals of multiple network devices, that is, the phase change amount corresponding to the set of reference signals of multiple network devices at the first moment, that is, the phase change amount between multiple network devices. In this way, the network device can perform phase compensation on the downlink signal by combining the phase change amount corresponding to the reference signal sets in at least two reference signal sets at the first moment, thereby improving the accuracy of phase compensation.

[0024] In a possible design, the phase change amount between the reference signal sets in at least two reference signal sets includes: the phase change amount corresponding to the first reference signal set and the second reference signal set. Among them, the second reference signal set is a preset reference signal set in at least two reference signal sets, and the first reference signal set is any reference signal set other than the second reference signal set in at least two reference signal sets.

[0025] In a possible design, the phase change amount corresponding to the reference signal sets in at least two reference signal sets includes: the phase change amount corresponding to the i-th reference signal set and the (i + 1)-th reference signal set in at least two reference signal sets. i is an integer, and 1 ≤ i < I. Among them, I is the total number of reference resource sets in at least two reference signal sets.

[0026] In a possible design, the phase change amount corresponding to the reference signal sets in at least two reference signal sets is related to the index of the frequency domain unit.

[0027] Optionally, the phase change amount at the first moment and the index of the frequency domain unit satisfy a linear relationship.

[0028] Further, the phase change amount at the first moment and the index of the frequency domain unit satisfy the following relationship: P1 = 2πρ + 2πkσ. Among them, P1 is the phase change amount at the first moment, k is the index of the frequency domain unit, k is a positive integer greater than or equal to 0, ρ is a constant, and σ is a constant.

[0029] In a possible design, the reference signal is a channel state information reference signal CSI-RS.

[0030] In a possible design scheme, the first moment is the end position of the last reference signal set before the channel state information CSI reference resource in at least two reference signal sets. Alternatively, the first moment is the time domain position corresponding to the CSI reference resource. Alternatively, the first moment is the starting moment of reporting the first information. Alternatively, the first moment is the moment after the starting moment of reporting the first information, and the time length between the first moment and the moment of reporting the first information is the first time length.

[0031] In a possible design, reference signals of each reference signal set in at least two reference signal sets are carried on reference signal resources of the same reference signal resource set, wherein the reference signal resource set includes multiple reference signal resources.

[0032] Optionally, among the multiple reference signal resources in the reference signal resource set, the ports corresponding to the same port index are the same. Alternatively, the multiple reference signal resources in the reference signal resource set are quasi-co-located.

[0033] In a possible design, reference signals of different reference signal sets in at least two reference signal sets are respectively carried on reference signal resources of different reference signal resource sets, wherein the reference signal resource set includes one reference signal resource.

[0034] In a possible design, reference signals of each reference signal set in at least two reference signal sets are carried on reference signal resources of multiple reference signal resource sets.

[0035] Optionally, there is at least one reference signal resource with the same resource identifier in each reference signal resource of the multiple reference signal resource sets.

[0036] Alternatively, optionally, the reference signal resources in multiple reference signal resource sets are arranged based on a resource identifier order, the ports corresponding to the same port index of reference signal resources with the same arrangement order in different reference signal resource sets are the same, and / or the reference signal resources with the same arrangement order in different reference signal resource sets are quasi-co-located.

[0037] In a possible design, the reference signals of each reference signal set in at least two reference signal sets are carried on reference signal resources of the same reference signal resource set, wherein the reference signal resource set includes multiple reference signal resources, and reference signals of different reference signal sets are carried on different reference signal resources.

[0038] In a possible design scheme, the method provided in the second aspect also includes: the network device performs phase compensation according to the first information.

[0039] In addition, the technical effects of the phase compensation method described in the second aspect can refer to the technical effects of the phase compensation method described in the first aspect, and will not be repeated here.

[0040] In a third aspect, a communication device is provided, wherein the communication device is used to execute the phase compensation method described in any one of the implementation modes of the first aspect to the second aspect.

[0041] In the present application, the communication device described in the third aspect may be the terminal described in the first aspect or the network device described in the second aspect, or a chip (system) or other parts or components that may be arranged in the terminal or network device, or a device including the terminal or network device.

[0042] It should be understood that the communication device described in the third aspect includes a module, unit, or means corresponding to the phase compensation method described in any one of the first to second aspects, and the module, unit, or means can be implemented by hardware, software, or hardware executing the corresponding software implementation. The hardware or software includes one or more modules or units for performing the functions involved in the above-mentioned phase compensation method.

[0043] In a fourth aspect, a communication device is provided, comprising: a processor, the processor being configured to execute the phase compensation method described in any possible implementation manner of the first aspect to the second aspect.

[0044] In a possible design solution, the communication device described in the fourth aspect may further include a transceiver. The transceiver may be a transceiver circuit or an interface circuit. The transceiver may be used for the communication device described in the fourth aspect to communicate with other communication devices.

[0045] In a possible design scheme, the communication device described in the fourth aspect may further include a memory. The memory may be integrated with the processor or may be separately provided. The memory may be used to store the computer program and / or data involved in the phase compensation method described in any one of the first aspect to the second aspect.

[0046] In the present application, the communication device described in the fourth aspect may be the terminal described in the first aspect or the network device described in the second aspect, or a chip (system) or other parts or components that may be arranged in the terminal or network device, or a device including the terminal or network device.

[0047] In a fifth aspect, a communication device is provided. The communication device includes: a processor, the processor is coupled to a memory, and the processor is used to execute a computer program stored in the memory, so that the communication device performs the phase compensation method described in any possible implementation of the first aspect to the second aspect.

[0048] In a possible design solution, the communication device described in the fifth aspect may further include a transceiver. The transceiver may be a transceiver circuit or an interface circuit. The transceiver may be used for the communication device described in the fifth aspect to communicate with other communication devices.

[0049] In the present application, the communication device described in the fifth aspect may be the terminal described in the first aspect or the network device described in the second aspect, or a chip (system) or other parts or components that may be set in the terminal or network device, or a device that includes the terminal or network device.

[0050] In a sixth aspect, a communication device is provided, comprising: a processor and a memory; the memory is used to store a computer program, and when the processor executes the computer program, the communication device executes the phase compensation method described in any one of the implementation methods in the first aspect to the second aspect.

[0051] In a possible design solution, the communication device described in the sixth aspect may further include a transceiver. The transceiver may be a transceiver circuit or an interface circuit. The transceiver may be used for the communication device described in the sixth aspect to communicate with other communication devices.

[0052] In the present application, the communication device described in the sixth aspect may be the terminal described in the first aspect or the network device described in the second aspect, or a chip (system) or other parts or components that may be arranged in the terminal or network device, or a device including the terminal or network device.

[0053] In a seventh aspect, a communication device is provided, comprising: a processor; the processor is used to couple with a memory, and after reading a computer program in the memory, execute a phase compensation method as described in any one of the implementation methods in the first aspect to the second aspect according to the computer program.

[0054] In a possible design solution, the communication device described in the seventh aspect may further include a transceiver. The transceiver may be a transceiver circuit or an interface circuit. The transceiver may be used for the communication device described in the seventh aspect to communicate with other communication devices.

[0055] In the present application, the communication device described in the seventh aspect may be the terminal described in the first aspect or the network device described in the second aspect, or a chip (system) or other parts or components that may be set in the terminal or network device, or a device that includes the terminal or network device.

[0056] In an eighth aspect, a processor is provided, wherein the processor is used to execute the phase compensation method described in any possible implementation manner of the first aspect to the second aspect.

[0057] In a ninth aspect, a communication system is provided, wherein the communication system includes one or more terminals and one or more network devices.

[0058] In a tenth aspect, a computer-readable storage medium is provided, comprising: a computer program or instructions; when the computer program or instructions are executed on a computer, the computer executes the phase compensation method described in any possible implementation of the first aspect to the second aspect.

[0059] In the eleventh aspect, a computer program product is provided, comprising a computer program or instructions, which, when executed on a computer, enables the computer to execute the phase compensation method described in any possible implementation of the first to second aspects.

[0060] In addition, the technical effects of the communication device described in the third to eleventh aspects above can refer to the technical effects of the phase compensation method described in the first to second aspects above, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] Figure 1 A schematic diagram of the communication system architecture of the IPRAN network provided in the embodiment of the present application;

[0062] Figure 2 Schematic diagram of sampling frequency offset and carrier frequency offset caused by different clocks;

[0063] Figure 3 A schematic diagram of a phase feedback provided in an embodiment of the present application;

[0064] Figure 4 A schematic diagram of channels of different network devices provided in an embodiment of the present application;

[0065] Figure 5 A schematic diagram of the architecture of a communication system provided in an embodiment of the present application;

[0066] Figure 6 A schematic diagram of information interaction between a network device and a terminal provided in an embodiment of the present application;

[0067] Figure 7 A flow chart of a phase compensation method provided in an embodiment of the present application;

[0068] Figure 8 Schematic diagram of the relationship between the RS resource set, RS resource and RS set provided in the embodiment of the present application Figure 1 ;

[0069] Fig. 9 Schematic diagram of the relationship between the period, RS resource set, RS resource and RS set provided in the embodiment of the present application Figure 1 ;

[0070] Fig.10 Schematic diagram of the relationship between the RS resource set, RS resource and RS set provided in the embodiment of the present application Figure 2 ;

[0071] Fig.11 Schematic diagram of the relationship between the RS resource set, RS resource and RS set provided in the embodiment of the present application Figure 3 ;

[0072] Fig.12 Schematic diagram of the relationship between the period, RS resource set, RS resource and RS set provided in the embodiment of the present application Figure 2 ;

[0073] Fig.13 A schematic diagram of the first moment provided in an embodiment of the present application;

[0074] Fig.14 A schematic diagram of the corresponding relationship between the phase shift difference indicated by the first information and the reference signal set provided in an embodiment of the present application;

[0075] Fig.15 A schematic diagram of a phase compensation provided by an embodiment of the present application;

[0076] Fig.16 A schematic diagram of the structure of the communication device provided in the embodiment of the present application Figure 1 ;

[0077] Fig.17 A schematic diagram of the structure of the communication device provided in the embodiment of the present application Figure 2 . DETAILED DESCRIPTION

[0078] The technical terms and technical solutions in this application will be described below in conjunction with the accompanying drawings.

[0079] 1. Symbol: It can also be referred to as a time domain symbol. In the embodiments of the present application, the symbol can be an orthogonal frequency division multiplexing (OFDM) symbol or a discrete Fourier transform spread OFDM (DFT-s-OFDM) symbol. If not otherwise specified, the symbols in the embodiments of the present application refer to time domain symbols.

[0080] It should be understood that the following embodiments use symbols as examples. In actual implementation, the symbol may also be other time domain units, including multiple symbols, at least one time slot, or at least one mini slot, etc.

[0081] 2. Frequency domain unit: A frequency domain unit may include at least one sub-carrier. It is understandable that the frequency domain unit may also be divided according to other possible frequency domain granularities, such as resource blocks (RB), or physical resource blocks (PRB), or resource block groups (RBG), or virtual resource blocks (VRB), that is, a frequency domain unit may include at least one RB, or PRB, or RBG, or VRB, which will not be described in detail here.

[0082] The coherent joint transmission (CJT) technology can improve the downlink signal to interference and noise ratio (SINR), that is, the signal to noise ratio. In the communication scheme based on CJT technology, the same terminal can be served by multiple network devices in a coordinated manner. The signals sent by multiple network devices that provide services for the terminal are coherently superimposed at the terminal, and the interference signals are coherently canceled at the terminal, so that the network throughput and user experience can be improved. Since signal processing, sampling and carrier generation are all based on clock signals. Assuming that the clocks of multiple network devices are different, then multiple network devices do not share a common clock source, which will cause the clock signals generated by the clock sources of these network devices to be asynchronous (also called clock asynchrony or clock asynchrony), such as different frequencies and / or different phases of the clock signals of different network devices, which in turn causes the phases of the signals received by the terminal from different network devices to fail to meet the coherence condition, affecting the CJT transmission effect. In other words, for coherent processing of the signal, the clock signals between the different network devices that provide services in a coordinated manner need to be synchronized (also called clock synchronization), that is, the phases of the clock signals of different network devices are consistent.

[0083] Take the Internet Protocol Radio Access Network (IPRAN) as an example. Figure 1As shown, in a communication system using IPRAN networking, a network device 101a, a network device 101b and a terminal 102 are included. Both the network device 101a and the network device 102b include a universal main control (UMPT) unit and a universal baseband processing (UBBP) unit. Among them, the universal main control unit is used to provide signaling processing and resource management functions, and the communication baseband processing unit can be used to implement baseband signal processing functions. The network device 101a and the network device 101b can interact through a backhaul link (BH). Among them, the clock sources of the network device 101a and the network device 101b are different. In the case where the terminal provides services through the network device 101a and the network device 101b, the phase shift of the signal of the network device 1 after reaching the terminal is inconsistent with the phase shift of the signal of the network device 2 after reaching the terminal, that is, the signal of the network device 1 and the signal of the network device 2 received by the terminal do not meet the complete coherence condition, thereby affecting the CJT transmission effect.

[0084] It can be understood that phase shift refers to the offset of the phase of a signal, that is, phase offset.

[0085] The frequencies of clock signals of different network devices are different, which can also be said that there is a deviation in the clock signals of different network devices. The phases of clock signals of different network devices are different, which can also be said that there is a phase deviation in the clock signals of different network devices.

[0086] For ease of understanding, the following describes the impact of different clock sources of multiple network devices that provide services in collaboration on the received signal of the terminal in combination with two network devices, such as network device 1 and network device 2. Figure 2 As shown, assuming that network device 1 and network device 2 cooperate to provide services for the terminal, network device 1 and network device 2 do not share a common clock source, the reference clock frequencies of network device 1 and network device 2 are both f0, the deviation of the clock frequency of network device 1 relative to the reference clock frequency is δ1, and the deviation of the clock frequency of network device 2 relative to the reference clock frequency is δ2, then, the frequency of the clock signal generated by the clock source of network device 1 is f0*(1+δ1), and the frequency of the clock signal generated by the clock source of network device 2 is f0*(1+δ2).

[0087] Since the baseband sampling clocks of network device 1 and network device 2 and the carrier signal used for up-conversion are generated based on their own clock signals, when there is a deviation between the frequency of the clock signal and the reference clock frequency, a deviation will be introduced in the corresponding baseband sampling clock frequency and carrier frequency. In other words, the deviation between the frequency of the clock signal and the reference clock frequency will cause a deviation between the baseband sampling clock frequency and the carrier frequency. For example, for network device 1, the baseband sampling clock frequency is generated based on the frequency of the clock signal generated by the clock source of network device 1. The baseband sampling clock frequency of network device 1 is The relationship shown in the following formula (1) is satisfied.

[0088]

[0089] The baseband sampling clock frequency of the network device 1 is converted by a digital-to-analog converter (DAC) and then up-converted based on the carrier corresponding to the network device 1, wherein the carrier frequency of the carrier of the network device 1 satisfies the relationship shown in the following formula (2):

[0090]

[0091] For network device 2, the baseband sampling clock frequency is generated according to the frequency of the clock signal generated by the clock source of network device 2. The relationship shown in the following formula (3) is satisfied.

[0092]

[0093] The baseband sampling clock frequency of the network device 2 is converted by a digital-to-analog converter (DAC) and then up-converted based on the carrier corresponding to the network device 2, wherein the carrier frequency of the carrier of the network device 2 satisfies the relationship shown in the following formula (4):

[0094]

[0095] Among them, f S is the baseband sampling reference frequency, is the carrier frequency of network device 1, f C is the carrier reference frequency, is the carrier frequency of network device 2.

[0096] The baseband sampling period of network device 1 is The baseband sampling period of network device 2 is

[0097] Assume that the carrier frequency used by the terminal for down-conversion is The baseband sampling period used by the terminal for down-conversion is After the terminal receives the signal from network device 1 and the signal from network device 2, it down-converts the received signal based on the carrier used for down-conversion, and the down-converted signal is converted into a digital signal by an analog-to-digital converter (ADC) to obtain a baseband signal.

[0098] Then, the carrier frequency offset (CFO) of the network device 1 relative to the terminal, that is, ε1, satisfies the relationship shown in the following formula (5):

[0099]

[0100] Where ∝ means proportional to .

[0101] The carrier frequency offset of network device 2 relative to the terminal, that is, ε2, satisfies the relationship shown in the following formula (6):

[0102]

[0103] The sampling frequency offset (SFO) of the network device 1 relative to the terminal, that is, μ1, satisfies the relationship shown in the following formula (7):

[0104]

[0105] The sampling frequency offset of network device 2 relative to the terminal, namely μ2, satisfies the relationship shown in the following formula (8):

[0106]

[0107] The following analyzes the influence of SFO and CFO on the received signal of the terminal, that is, the signal from the network device 1 or the signal from the network device 2 received by the terminal, in combination with the above parameters.

[0108] Case 1: Impact of SFO on the received signal of the terminal.

[0109] The reception signal received by the terminal from a network device satisfies the relationship shown in the following formula (9):

[0110]

[0111] Wherein, t represents the time when the terminal receives the signal, r(t) represents the signal received by the network device at time t, l is the identifier of the symbol (such as OFDM symbol), that is, the lth symbol, or symbol l; k is the identifier of the frequency domain unit (such as subcarrier), that is, the kth frequency domain unit, or frequency domain unit k, k is greater than or equal to 0, and k is an integer; H l,k represents the channel on symbol l and frequency domain unit k, s l,k represents the signal on the symbol l and the frequency domain unit k, Δf represents the frequency interval between two adjacent frequency domain units, T Symb Indicates the period of a symbol, that is, the duration. If the baseband sampling period of the network device is T S , the deviation between the baseband sampling period of the terminal and the baseband sampling period of the network device is ΔT S , that is, the baseband sampling period of the terminal is T S +ΔT S , then the received signal at the nth sampling point on symbol l satisfies the relationship shown in the following formula (10):

[0112] R l,n =r((lK+n)(T S +ΔT S )); (10)

[0113] By sampling the signal on symbol l, we can get the received signal at the 0th to K-1th sampling points on symbol l. (a sequence of discrete points in the time domain). By performing discrete Fourier transform (DFT), we can get the frequency domain received sequence That is, the received signal of the terminal on symbol l and each frequency domain unit from frequency domain unit 0 to frequency domain unit K-1. l,k A represents the received signal of the terminal at symbol l and frequency domain unit k. lk The relationship shown in the following formula (11) is satisfied:

[0114]

[0115] Combined with formula (11), it can be seen that the phase shift of the received signal at the terminal caused by SFO is: The phase shift caused by SFO is related to the frequency domain unit k and the symbol l. In other words, the phase shift caused by SFO is related to the frequency domain unit k and time.

[0116] Case 2: Impact of CFO on the received signal of the terminal.

[0117] Assume that the deviation between the carrier frequency of the terminal and the carrier frequency of the network device is Δf C, the carrier frequency used by the terminal for down-conversion is Then the carrier frequency used by the network equipment for up-conversion is If the time domain signal sent by the network device is x(t), due to the existence of CFO, the time domain signal sent by the network device is down-converted and the received signal received by the terminal is Correspondingly, the baseband signal at the terminal is It can be seen that compared with the time domain signal x(t) sent by the network device, the phase shift of the received signal at the terminal caused by CFO is 2πΔf C t, the phase shift varies with time.

[0118] Based on the analysis of the above scenario 1 and scenario 2, it can be seen that both SFO and CFO will cause a phase shift in the signal sent by the network device at the terminal.

[0119] For ease of understanding, the SFO between a network device and a terminal is hereinafter referred to as the SFO corresponding to the network device; the CFO between a network device and a terminal is hereinafter referred to as the CFO corresponding to the network device. For example, the SFO between network device 1 and a terminal is hereinafter referred to as the SFO corresponding to network device 1; the CFO between network device 1 and a terminal is hereinafter referred to as the CFO corresponding to network device 1. The SFO between network device 2 and a terminal is hereinafter referred to as the SFO corresponding to network device 2; the CFO between network device 2 and a terminal is hereinafter referred to as the CFO corresponding to network device 2.

[0120] The following describes, in combination with Situation 1 and Situation 2, the impact of SFO and CFO on the received signal of the terminal when multiple network devices cooperate to provide services for the terminal.

[0121] Still taking the network devices that cooperate to provide services to the terminal as an example, network device 1 and network device 2, the SFO corresponding to network device 1 is μ1, and the CFO corresponding to network device 1 is ε1. At this time, the channel between network device 1 and the terminal The following relationship is satisfied:

[0122]

[0123] in, is the channel of network device 1 on symbol l and frequency domain unit k, is the channel of network device 1 at symbol 0 and frequency domain unit k. Similarly, the SFO corresponding to network device is μ2, and the CFO corresponding to network device 2 is ε2. Then, the channel between network device 2 and the terminal is The following relationship is satisfied:

[0124]

[0125] in, is the channel of network device 2 in symbol l and frequency domain unit k, is the channel of network device 2 at symbol 0 and frequency domain unit k.

[0126] Since the deviation between the CFO corresponding to the network device 2 and the CFO corresponding to the network device 1 is Δε0, where Δε0 satisfies the relationship shown in the following formula (14):

[0127] Δε0=ε2-ε1; (14)

[0128] Similarly, the deviation between the SFO corresponding to the network device 2 and the SFO corresponding to the network device 1 is Δμ0, where Δμ0 satisfies the relationship shown in the following formula (15):

[0129] Δμ0=μ2-μ1; (15)

[0130] If Δε0=Δμ0=0, then the channel and Channel The phase shift relative to symbol 0 is the same, that is, 2π(ε1+kμ1)l=2π(ε2+kμ2)l. In this case, coherent transmission can still be achieved through reasonable weight design.

[0131] If Δε0≠0 and Δμ0≠0, at symbol l and frequency domain unit k, the channel between network device 2 and the terminal satisfies the relationship shown in the following formula (16):

[0132]

[0133] According to formula (16), the difference between the phase shift of the channel between network device 2 and the terminal (i.e., the phase shift corresponding to network device 2) and the phase shift of the channel between network device 1 and the terminal (i.e., the phase shift corresponding to network device 1) is the phase shift difference The following relationship is satisfied:

[0134]

[0135] Combining formula (17), we can know that It changes over time and accumulates over time.

[0136] Assuming that the signals sent by network device 1 and network device 2 both include signal stream 1 and signal stream 2, then the signal (precoded signal) received by the terminal at time t0 satisfies the relationship shown in the following formula (18):

[0137] y1(t0)=(H 1 W 11 +H 2 W21 )S1+(H 1 W 12 +H 2 W 22 )S2; (18)

[0138] Among them, H 1 is the channel between network device 1 and the terminal, H 2 is the channel between network device 2 and the terminal, W 11 The precoding matrix W is used by network device 1 to precode signal stream 1. 21 The precoding matrix used by network device 2 to precode signal stream 1, W 12 represents the precoding matrix used by network device 1 to precode signal stream 2, W 22 It represents the precoding matrix used by network device 2 to precode signal stream 2. S1 represents signal stream 1, and S2 represents signal stream 2.

[0139] At a time period of Δt after time t0, i.e., time t0+Δt, assuming that the channel between network device 1 and the terminal and the channel between network device 2 and the terminal are not updated, then the channel between network device 1 and the terminal, the precoding matrix between network device 1 and the terminal, the channel between network device 2 and the terminal, and the precoding matrix between network device 2 and the terminal are the same as at time t0. In this case, the signal (precoded signal) received by the terminal at time t0+Δt satisfies the relationship shown in the following formula (19):

[0140]

[0141] Assuming that at time t0, the signal received by the terminal can achieve coherent superposition and interference coherent cancellation, then at time t0+Δt, the phase corresponding to network device 2 has an additional phase shift difference relative to the phase corresponding to network device 1. Therefore, the signals received by the terminal can only achieve partial coherent superposition and the interference cannot be completely eliminated, which will affect the CJT transmission performance.

[0142] In some possible design schemes, multiple network devices that collaborate to provide services to a terminal can send reference signals (RS) to each other, and determine calibration coefficients based on the RSs exchanged between the network devices, and then compensate for the phase shift difference caused by the clock synchronization error between the two network devices based on the calibration coefficients to achieve coherent superposition of signals and eliminate interference.

[0143] In some possible design solutions, the clock synchronization problem can be solved through hardware design, thereby reducing the phase shift difference caused by clock synchronization errors between different network devices. For example, a coordination board can be set in the network device to make network devices with different clock sources share the same clock source, or the clock can be synchronized by upgrading the clock hardware, thereby achieving coherent superposition of received signals and eliminating interference.

[0144] In some possible design schemes, for each of the multiple network devices that collaborate to provide services to the terminal, the terminal can measure the reference signal on multiple frequency domain units and multiple time domain units, where each frequency domain unit and each time domain unit corresponds to one measurement, and the phase of the channel on the frequency domain unit and the time domain unit can be obtained accordingly. The terminal can determine the SFO and CFO of the network device based on the phases of multiple channels corresponding to each network device obtained by measurement. Figure 3 Let’s take an example. Figure 3 As shown, it is assumed that the network devices that collaboratively provide services for the terminal include network device 1 and network device 2. Network device 1 sends multiple RSs to the terminal (it can also be said that multiple RSs are sent), and network device 2 sends multiple RSs to the terminal. Correspondingly, the terminal receives multiple RSs from network device 1 and multiple RSs from network device 2. Among them, the multiple RSs sent by network device 1 are located on multiple frequency domain units and multiple symbols, and the RSs sent by network device 2 are located on multiple frequency domain units and multiple symbols. The terminal determines the SFO of the signal sent by network device 1 at the terminal based on the multiple RSs sent by network device 1, that is, μ1, and the CFO, that is, ε1. The terminal determines the SFO of the signal sent by network device 2 at the terminal based on the multiple RSs sent by network device 2, that is, μ2, and the CFO, that is, ε2.

[0145] Based on μ1, ε1, μ2 and ε2, the terminal can obtain the frequency deviation between the SFO corresponding to the network device 1 and the SFO corresponding to the network device 2, and the frequency deviation between the CFO corresponding to the network device 1 and the CFO corresponding to the network device 2.

[0146] The deviation Δε between the CFO corresponding to the network device 1 and the CFO corresponding to the network device 2 satisfies the relationship shown in the following formula (20):

[0147] Δε=ε1-ε2; (20)

[0148] The deviation Δμ between the SFO corresponding to the network device 1 and the SFO corresponding to the network device 2 satisfies the relationship shown in the following formula (21):

[0149] Δμ=μ1-μ2; (21)

[0150] After obtaining Δε and Δμ, the terminal may send information indicating the phase shift difference corresponding to Δε and Δμ to at least one of network device 1 and network device 2 .

[0151] The information used to indicate the phase shift difference corresponding to Δε and Δμ may include Δε and Δμ, or the phase shift difference corresponding to Δε and Δμ, such as 2π[Δε+kΔμ]l. Network device 1 and / or network device 2 may perform phase compensation based on the phase shift difference corresponding to Δε and Δμ. For example, if the terminal sends information used to indicate the phase shift difference corresponding to Δε and Δμ to network device 1, then network device 1 may perform phase compensation based on For another example, if the terminal sends information indicating Δε and Δμ to the network device 2, the network device 2 can calculate the phase compensation according to For another example, if the terminal sends information indicating Δε and Δμ to network device 1 and network device 2, then network device 1 may perform phase compensation, or network device 2 may perform phase compensation, or network device 1 and network device 2 may perform phase compensation respectively.

[0152] For example, for the above The network device 2 may multiply the phase shift by the precoding vector for compensation. The compensated signal is shown in the following formula (22):

[0153]

[0154] The principle of phase compensation will not be elaborated here.

[0155] In addition, in the actual communication process, in addition to the phase shift caused by SFO and CFO between the network device and the terminal, the frequency offset caused by multipath delay and the frequency offset caused by the Doppler effect will also cause the phase shift between the network device and the terminal. In this case, the principle of phase compensation is similar to the principle of phase compensation when only SFO and CFO are considered. The difference is that when considering the frequency offset caused by multipath delay and the frequency offset caused by the Doppler effect, μ1 also includes the frequency offset caused by multipath delay, ε1 also includes the frequency offset caused by the Doppler effect, μ2 also includes the frequency offset caused by multipath delay, and ε2 also includes the frequency offset caused by the Doppler effect.

[0156] For ease of understanding, the following takes the example where both network device 1 and network device 2 send signals at symbol 0, symbol 1, and frequency domain unit 0 to frequency domain unit K to illustrate how to determine μ1, ε1, μ2, and ε2.

[0157] Assume that the phase difference Δθ between two channels between the same network device and the terminal satisfies the relationship shown in the following formula (23):

[0158] Δθ=2π(ε+kμ)ΔlΔ t ; (twenty three)

[0159] Among them, μ is the SFO corresponding to the network device, ε is the CFO corresponding to the network device, Δl is the number of symbols between the two channels, Δ t It is the time length between two adjacent symbols in the time domain.

[0160] like Figure 4 As shown in (a) in FIG. 1 , the channel between network device 1 and terminal on symbol l and frequency domain unit k is The phase of can be measured from the RS on symbol l and frequency domain unit k, The phase of can be measured from the RS on symbol 0 and frequency domain unit k, The phase can be obtained based on the RS measurement on symbol 1 and frequency domain unit k. The phase shift between the channels corresponding to two adjacent symbols on frequency domain unit k of network device 1 is The relationship shown in formula (24) is satisfied:

[0161]

[0162] in, for The phase of for phase.

[0163] According to formula (24), we can get

[0164] Therefore, according to formula (23), on the same frequency domain unit k, and The phase shift between The following relationship is satisfied:

[0165]

[0166] Will Substituting them into formula (25) respectively, we can obtain ε1 and μ1 accordingly.

[0167] like Figure 4 As shown in (b) in FIG. 1 , the channel between the network device 2 and the terminal on the symbol l and the frequency domain unit k is The phase of can be measured from the RS on symbol l and frequency domain unit k, The phase of can be measured from the RS on symbol 0 and frequency domain unit k, The phase can be obtained based on the RS measurement on symbol 1 and frequency domain unit k. The phase shift between the channels corresponding to two adjacent symbols on frequency domain unit k of network device 2 is The following relationship is satisfied:

[0168]

[0169] in, for The phase of for phase.

[0170] According to formula (26), we can get

[0171] Therefore, according to formula (23), on the same frequency domain unit k, and The phase shift between The following relationship is satisfied:

[0172]

[0173] Will Substituting them into formula (27) respectively, we can obtain ε2 and μ2 accordingly.

[0174] It should be understood that the above-mentioned calculation methods of ε1, μ1, ε2 and μ2 (such as linear regression) are only used as examples. In actual implementation, other methods can also be used to obtain ε1, μ1, ε2 and μ2, which will not be repeated here.

[0175] In the above-mentioned phase compensation scheme, only the phase shift between multiple network devices caused by time changes is considered, that is, the phase shift between the moment of transmitting the downlink signal (it can also be said to be the moment of precoding) relative to a moment used for reference, such as the phase shift between t0+Δt and t0. However, the network device does not compensate for the difference at the moment used for reference, such as t0, which will cause the phase compensation of the device to be inaccurate.

[0176] It should be understood that in the embodiments of the present application, the same symbols represent the same meanings and will not be repeated hereafter.

[0177] The technical solution in this application will be described below in conjunction with the accompanying drawings.

[0178] The technical solutions of the embodiments of the present application can be applied to various communication systems, such as wireless fidelity (WiFi) systems, vehicle to everything (V2X) communication systems, device-to-device (D2D) communication systems, Internet of Vehicles communication systems, 4th generation (4G) mobile communication systems, such as long term evolution (LTE) systems, worldwide interoperability for microwave access (WiMAX) communication systems, fifth generation (5G) mobile communication systems, such as new radio (NR) systems, and future communication systems, such as sixth generation (6G) mobile communication systems.

[0179] The present application will present various aspects, embodiments or features around a system that may include multiple devices, components, modules, etc. It should be understood and appreciated that each system may include additional devices, components, modules, etc., and / or may not include all of the devices, components, modules, etc. discussed in conjunction with the figures. In addition, combinations of these schemes may also be used.

[0180] In addition, in the embodiments of the present application, words such as "exemplarily" and "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "exemplary" in the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of the word "exemplary" is intended to present concepts in a concrete way.

[0181] First, in this application, "used to indicate" may include being used to indicate directly or indirectly. When describing that a certain "information" is used to indicate A, it may include that the information directly indicates A or indirectly indicates A, but it does not mean that the information must contain A.

[0182] The information indicated by a piece of information is called information to be indicated. In the specific implementation process, there are many ways to indicate the information to be indicated, such as but not limited to, the information to be indicated can be directly indicated, such as the information to be indicated itself or the index of the information to be indicated. The information to be indicated can also be indirectly indicated by indicating other information, wherein there is an association between the other information and the information to be indicated. It is also possible to indicate only a part of the information to be indicated, while the other parts of the information to be indicated are known or agreed in advance. For example, the indication of specific information can also be achieved with the help of the arrangement order of each piece of information agreed in advance (for example, stipulated by the protocol), thereby reducing the indication overhead to a certain extent. At the same time, the common parts of each piece of information can also be identified and indicated uniformly to reduce the indication overhead caused by indicating the same information separately.

[0183] In addition, the specific indication method may also be various existing indication methods, such as but not limited to the above-mentioned indication methods and various combinations thereof. The specific details of the various indication methods can refer to the prior art and will not be repeated herein. As can be seen from the above, for example, when it is necessary to indicate multiple information of the same type, different indication methods may be used for different information. In the specific implementation process, the desired indication method can be selected according to specific needs. The embodiment of the present application does not limit the selected indication method. In this way, the indication method involved in the embodiment of the present application should be understood to cover various methods that can enable the party to be indicated to obtain the information to be indicated.

[0184] The information to be indicated can be sent as a whole, or divided into multiple sub-information and sent separately, and the sending period and / or sending time of these sub-information can be the same or different. The specific sending method is not limited in this application. Among them, the sending period and / or sending time of these sub-information can be pre-defined, for example, pre-defined according to the protocol, or can be configured by the transmitting device by sending configuration information to the receiving device. Among them, the configuration information can include, for example, but not limited to, one or a combination of at least two of radio resource control (RRC) signaling, medium access control (MAC) layer signaling and physical layer signaling. Among them, MAC layer signaling, for example, includes MAC control element (CE); physical (PHY) layer signaling, for example, includes downlink control information (DCI).

[0185] Second, in the embodiments shown below, the first, second and various digital numbers are only used for the convenience of description and are not used to limit the scope of the embodiments of the present application. For example, to distinguish different indication information.

[0186] Third, "pre-set", "pre-defined", or "pre-configured" can be implemented by pre-saving corresponding codes, tables or other methods that can be used to indicate relevant information in a device (for example, including a terminal device and a network device), or can be pre-specified in a protocol. The present application does not limit its specific implementation method. Among them, "save" can mean saving in one or more memories. The one or more memories can be set separately or integrated in an encoder or decoder, a processor, or a communication device. The one or more memories can also be partially set separately and partially integrated in a decoder, a processor, or a communication device. The type of memory can be any form of storage medium, which is not limited by the present application.

[0187] Fourth, the "protocol" involved in the embodiments of the present application may refer to a standard protocol in the field of communications, for example, it may include 3GPP's LTE protocol (such as the TS36 series of technical specifications), NR protocol (such as the TS38 series of technical specifications) and related protocols used in future communication systems, which is not limited in this application.

[0188] The network architecture and business scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. A person of ordinary skill in the art can appreciate that with the evolution of the network architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0189] The network architecture and business scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. A person of ordinary skill in the art can appreciate that with the evolution of the network architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0190] To facilitate understanding of the embodiments of the present application, first Figure 5 The communication system shown in the example is used to describe in detail the communication system applicable to the embodiment of the present application. Figure 5 A schematic diagram of the architecture of a communication system applicable to the method provided in an embodiment of the present application.

[0191] like Figure 5 As shown, the communication system includes network equipment and terminals.

[0192] Exemplarily, the network device may include network devices 501a to 501b, and the terminal may include terminals 502a to 502e. The terminal may be connected to the network device wirelessly, and the network may be connected to the core network ( Figure 5 connected to the substrate 100 (not shown).

[0193] The coverage area of ​​network device 501a is area 1, the coverage area of ​​network device 501b is area 2, terminals 502a to 302d are located in area 1, and terminals 502a, 502b, and 502e are located in area 2. Terminals 502a and 502b are located in the overlapping area of ​​area 1 and area 2. For the terminals (terminal 502a or terminal 502b) in the overlapping area of ​​area 1 and area 2, network devices 501a and 501b can perform cooperative transmission. For the terminals in area 1 (such as terminal 502c or terminal 502d), network device 501a can perform non-cooperative transmission. For the terminals in area 2 (such as terminal 502e), network device 501a can perform non-cooperative transmission.

[0194] The terminal may be a terminal with transceiver functions, or may be a chip or chip system provided in the terminal. The terminal may also be called user equipment (UE), access terminal, subscriber unit (subscriberunit), subscriber station, mobile station (MS), mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device. The terminal in the embodiments of the present application can be a mobile phone, a cellular phone, a smart phone, a tablet computer, a wireless data card, a personal digital assistant (PDA), a wireless modem, a handset, a laptop computer, a machine type communication (MTC) terminal, a computer with a wireless transceiver function, a virtual reality (VR) terminal, an augmented reality (AR) terminal, a smart home device (for example, a refrigerator, a television, an air conditioner, an electric meter, etc.), an intelligent robot, a robotic arm, a workshop equipment, a wireless terminal in unmanned driving, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in telemedicine, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, a vehicle-mounted terminal, a road side unit with a terminal function, and a wireless terminal in a smart city. unit, RSU), etc., flying equipment (for example, intelligent robots, hot air balloons, drones, airplanes), etc. The terminal of the present application may also be an on-board module, on-board module, on-board component, on-board chip or on-board unit built into the vehicle as one or more components or units. The terminal may also be other devices with terminal functions. For example, the terminal may also be a device that serves as a terminal function in D2D communication. The embodiments of the present application do not limit the device form of the terminal. The device for realizing the function of the terminal may be a terminal device; it may also be a device that can support the terminal device to realize the function, such as a chip system. The device may be installed in the terminal device or used in combination with the terminal device. In the embodiments of the present application, the chip system may be composed of chips, or may include chips and other discrete devices.

[0195] The network device may be a device with wireless transceiver functions, or may be a chip or chip system provided in the device, located in the access network (AN) of the communication system, and used to provide access services for the terminal. For example, the network device may be referred to as a radio access network device (RAN), and may specifically be a next-generation mobile communication system, such as a 6G access network device, such as a 6G base station, or in the next-generation mobile communication system, the network device may also have other naming methods, which are all included in the protection scope of the embodiments of the present application, and the present application does not make any limitation on this. Alternatively, the network device may also include 5G, such as a gNB in ​​a new radio (NR) system, or one or a group of antenna panels (including multiple antenna panels) of a base station in 5G, or a network node constituting a gNB, a transmission point (TRP or transmission point, TP) or a transmission measurement function (TMF), such as a central unit (CU), a distributed unit (DU), a CU-control plane (CP), a CU-user plane (UP), or a radio unit (RU), an RSU with base station function, or a wired access gateway, or a core network element of 5G. Alternatively, the network device may also include: an access point (AP) in a wireless fidelity (WiFi) system, a wireless relay node, a wireless backhaul node, various forms of macro base stations, micro base stations (also called small stations), relay stations, access points, wearable devices, vehicle-mounted devices, etc.

[0196] Among them, CU and DU can be set separately, or can also be included in the same network element, such as a baseband unit (BBU). RU can be included in a radio frequency device or a radio frequency unit, such as a remote radio unit (RRU), an active antenna unit (AAU) or a remote radio head (RRH). It can be understood that the network device can be a CU node, a DU node, or a device including a CU node and a DU node. In addition, CU can be divided into a network device in an access network RAN, or CU can be divided into a network device in a core network CN, which is not limited here. In different systems, CU (or CU-CP and CU-UP), DU or RU may also have different names, but those skilled in the art can understand their meanings. For example, in an ORAN system, CU can also be called O-CU (open CU), DU can also be called O-DU, CU-CP can also be called O-CU-CP, CU-UP can also be called O-CU-UP, and RU can also be called O-RU. For the convenience of description, CU, CU-CP, CU-UP, DU and RU are used as examples in this application. Any unit in the CU (or CU-CP, CU-UP), DU and RU in this application can be implemented by a software module, a hardware module, or a combination of a software module and a hardware module. In the embodiment of the present application, the form of the network device is not limited. The device for implementing the function of the network device may be a network device; it may also be a device that can support the network device to implement the function, such as a chip system. The device can be installed in a network device or used in combination with a network device.

[0197] like Figure 6 As shown, the network device includes an RRC signaling interaction module ( Figure 6 RRC in the MAC signaling interaction module ( Figure 6 MAC), and PHY signaling and data interaction module ( Figure 6 The terminal includes an RRC signaling interaction module, a MAC signaling interaction module, and a PHY signaling and data interaction module.

[0198] The network device and the terminal can exchange RRC signaling through the RRC signaling interaction module. The network device and the terminal can exchange MAC CE signaling through the MAC signaling interaction module. The network device and the terminal can exchange one or more of the following through the PHY interaction module: uplink control signaling, downlink control signaling (such as DCI), uplink data, and downlink data.

[0199] It should be noted that the phase compensation method provided in the embodiment of the present application can be applied to Figure 5 For the specific implementation between the nodes shown, reference may be made to the following method embodiments, which will not be described in detail here.

[0200] It should be pointed out that the solutions in the embodiments of the present application can also be applied to other communication systems, and the corresponding names can also be replaced by the names of corresponding functions in other communication systems.

[0201] It should be understood that Figure 5 This is a simplified schematic diagram for ease of understanding only. The communication system may also include other network devices and / or other terminals. Figure 5 Not drawn in.

[0202] based on Figure 5 The communication system provided, an embodiment of the present application provides a phase compensation method. The phase compensation method includes: each of at least two network devices sends an RS set to a terminal. The terminal receives at least two reference signal sets. Each of the at least two reference signal sets includes at least one reference signal. The terminal sends first information based on the at least two reference signal sets. The first information is used to indicate the corresponding phase change between the reference signal sets in the at least two reference signal sets at a first moment. Each of the at least two network devices receives the first information and performs phase compensation based on the first information to improve the accuracy of the phase compensation.

[0203] The following will be combined Figure 7-Figure 14 The phase compensation method provided in the embodiment of the present application is described in detail.

[0204] For example, Figure 7 A flow chart of a phase compensation method provided in an embodiment of the present application. The phase compensation method can be applied to Figure 5 Communication between two nodes is shown.

[0205] like Figure 7 As shown, the phase compensation method includes the following steps:

[0206] S701: Each of at least two network devices sends an RS set to a terminal. Correspondingly, the terminal receives at least two RS sets.

[0207] Each of the at least two RS sets includes at least one RS.

[0208] Each of the at least two RS sets corresponds to a network device. That is, an RS set includes RSs sent by the network device corresponding to the RS set. In other words, each of the at least two network devices sends an RS set. The RS set can be understood as the RS set corresponding to the network device. As an example, Figure 7 It is shown that network device 1 and network device 2 respectively send their own RS sets to the terminal device.

[0209] The at least two RS sets are RS sets corresponding to each network device in the at least two network devices.

[0210] Taking the at least two network devices including four network devices as an example, the corresponding relationship between the network devices and the RS sets is shown in the following Table 1:

[0211] Table 1

[0212] Network equipment Network device 1 Network Device 2 Network device 3 Network Device 4 RS Collection RS Collection 1 RS Collection 2 RS Collection 3 RS Collection 4

[0213] In a possible design, RSs of each RS set in at least two RS sets are carried on RS resources of the same RS resource set, wherein the RS resource set includes multiple RS resources.

[0214] The following is an example with reference to Table 1. Assume that at least two network devices include network devices 1 to 4, and each of the at least two network devices corresponds to an RS set as shown in Table 1, and RS set 1 to RS set 4 correspond to RS resource set 1 to RS resource set 4 in sequence. Figure 8 As shown, RS resource set 1 includes RS resources 1 to RS resources 3, RS resource set 2 includes RS resources 4 to RS resources 6, RS resource set 3 includes RS resources 7 to RS resources 9, and RS resource set 4 includes RS resources 10 to RS resources 12. Then, the RSs in RS set 1 are carried on RS resources 1 to RS resources 3, the RSs in RS set 2 are carried on RS resources 4 to RS resources 6, the RSs in RS set 3 are carried on RS resources 7 to RS resources 9, and the RSs in RS set 4 are carried on RS resources 10 to RS resources 12. In this case, the relationship diagram among RS resource sets, RS resources, and RS sets is shown in Table 2.

[0215] Table 2

[0216]

[0217] It can be understood that, in this case, one RS resource in each RS resource set corresponds to one signal measurement, or in other words, the signal measurement for one network device can be performed once on each RS resource occupied by the RS of the network device. In the embodiment of the present application, when the RS is a channel state information reference signal (CSI-RS), the signal measurement refers to the measurement of the CSI-RS.

[0218] Combination Figure 8 For example, RS resources 1 to RS resources 3 in RS resource set 1 each correspond to one signal measurement.

[0219] Optionally, among multiple RS resources in the same RS resource set, ports corresponding to the same port index are the same. And / or, multiple RS resources in the same RS resource set are quasi-co-located.

[0220] The port corresponding to the port index is the port represented by the port index. The ports corresponding to the same port index are the same, that is, the ports corresponding to the same port index are the same.

[0221] The multiple RS resources in the RS resource set are quasi-colocated (QCL), which can also be said that the quasi-colocation information of the multiple RS resources in the RS resource set is the same. For example, the multiple RS resources in the RS resource set are quasi-colocated, which can mean that the large-scale and / or small-scale characteristics of the multiple RS resources in the RS resource set are the same.

[0222] Still combined Figure 8 Taking RS resource set 1 in the reference resource shown as an example, the ports corresponding to the same port index in RS resources 1 to RS resources 3 are the same. For example, the port index x in RS resource 1 is the same as the port corresponding to the port index x in RS resource 2, the port index x in RS resource 1 is the same as the port corresponding to the port index x in RS resource 3, and the port index x in RS resource 2 is the same as the port corresponding to the port index x in RS resource 3.

[0223] Similarly, combining Figure 8 Taking RS resource set 1 in the reference resource shown as an example, in RS resource set 1, RS resource 1 and RS resource 2 are quasi-co-located, RS resource 1 and RS resource 3 are quasi-co-located, and RS resource 2 and RS resource 3 are quasi-co-located.

[0224] In this way, the accuracy of the phase shift measured by the terminal can be improved, thereby further improving the accuracy of the phase compensation.

[0225] In a possible design, RSs of different RS sets in at least two RS sets are respectively carried on RS resources of different RS resource sets. That is, RSs of each RS set in at least two RS sets are carried on RS resources of one RS resource set. The RS resource set includes one RS resource.

[0226] In this case, the RS resource set is periodically configured or semi-periodically configured, and the RSs in an RS set are carried on the RS resources of an RS resource set in multiple periods. For example, the RS resource set includes RS resource set 1 to RS resource set 4, RS resource set 1 includes RS resource 1, RS resource set 2 includes RS resource 2, RS resource set 3 includes RS resource 3, and RS resource set 4 includes RS resource 4. The corresponding relationship between the period, RS resource set, RS resource and RS set is shown in Table 3. The relationship diagram between the period, RS resource set, RS resource and RS set is shown in Table 3. Fig. 9 shown.

[0227] Table 3

[0228]

[0229]

[0230] In one possible design, RSs of each RS set in at least two RS sets are carried on RS resources of multiple RS resource sets.

[0231] That is to say, each of the multiple RS resource sets has RS resources for carrying RSs in the same RS set.

[0232] In the following, in combination with the RS resource set and RS set in Table 1, assuming that RS resource set 1 includes RS resources 1 to RS resources 4, RS resource set 2 includes RS resources 5 to RS resources 8, and RS resource set 3 includes RS resources 9 to RS resources 12, then RS set 1 is carried on RS resources 1, RS resources 5, and RS resources 9, RS set 2 is carried on RS resources 2, RS resources 6, and RS resources 10, RS set 3 is carried on RS resources 3, RS resources 7, and RS resources 11, and RS set 4 is carried on RS resources 4, RS resources 8, and RS resources 12. The corresponding relationship between RS resource sets, RS resources, and RS sets is shown in Table 4.

[0233] Table 4

[0234]

[0235] Optionally, there is at least one RS resource with the same resource identifier in each of the multiple RS resource sets.

[0236] The resource identifier refers to an identifier for representing RS resources, and the resource identifier may also be called a resource index or other names, which will not be repeated here. It should be understood that RS resources with the same resource identifier in different RS resource sets are used to carry RSs in the same RS set.

[0237] like Fig.10 As shown, assuming that multiple RS resource sets include RS resource set 1 to RS resource set 3, then RS resource set 1 to RS resource set 3 all include RS resource 1, that is, the RS resource with a resource identifier of "1". Combined with the RS set example in Table 1, then RS resource set 1 to RS resource set 3 all also include RS resource 2, that is, the RS resource with a resource identifier of "2". RS resource set 1 to RS resource set 3 all also include RS resource 3, that is, the RS resource with a resource identifier of "3". RS resource set 1 to RS resource set 3 all also include RS resource 4, that is, the RS resource with a resource identifier of "4". In this case, RS set 1 is carried on RS resource 1 in RS resource set 1 to RS resource set 3, RS set 2 is carried on RS resource 2 in RS resource set 1 to RS resource set 3, RS set 3 is carried on RS resource 3 in RS resource set 1 to RS resource set 3, and RS set 4 is carried on RS resource 4 in RS resource set 1 to RS resource set 3. It is understandable that the relationship between the RS set and the RS resource carrying the RS set is only used as an example. In actual implementation, there may be other implementations, for example, RS set 1 is carried on RS resource 2 in RS resource set 1 to RS resource set 3, which will not be described here. The corresponding relationship between the RS resource set, RS resource and RS set is shown in Table 5.

[0238] Table 5

[0239]

[0240]

[0241] Alternatively, optionally, the RS resources in multiple RS resource sets are arranged based on a resource identifier order, and the ports corresponding to the same port index of RS resources with the same arrangement order in different RS resource sets are the same, and / or, RS resources with the same arrangement order in different RS resource sets are quasi-co-located.

[0242] The RS resources in multiple RS resource sets are arranged in order based on resource identifiers, which may include: the RS resources in multiple RS resource sets are arranged in ascending order based on resource identifiers, or arranged in descending order based on resource identifiers. It should be understood that the RS resources in multiple RS resource sets are arranged based on resource identifiers according to other arrangement rules, which will not be repeated here.

[0243] The ports corresponding to the same port index of RS resources with the same arrangement order in different RS resource sets are the same, that is, the ports corresponding to the same port index in the m-th RS resources in different RS resource sets are the same. RS resources with the same arrangement order in different RS resource sets are quasi-co-located, that is, the m-th RS resources in different RS resource sets are quasi-co-located. Wherein, m is a positive integer. Wherein, m is a positive integer.

[0244] For ease of understanding, the following uses the RS resources in multiple RS resource sets arranged in ascending order based on resource identifiers and the RS resource set shown in Table 1 as an example to illustrate the correspondence between the RS resource set, the RS set and the RS resource in this case. Fig.11 As shown, assuming that RS resource set 1 includes RS resources 1 to RS resources 4, RS resource set 2 includes RS resources 5 to RS resources 8, and RS resource set 3 includes RS resources 9 to RS resources 12, then RS set 1 is carried on RS resources 1, RS resources 5 and RS resources 9, RS set 2 is carried on RS resources 2, RS resources 6 and RS resources 10, RS set 3 is carried on RS resources 3, RS resources 7 and RS resources 11, and RS set 4 is carried on RS resources 4, RS resources 8 and RS resources 12. The corresponding relationship between RS resource sets, RS resources and RS sets is shown in Table 4. Among them, the ports corresponding to the same port index in RS resources 1, RS resources 5 and RS resources 9 are the same. The ports corresponding to the same port index in RS resources 2, RS resources 6 and RS resources 10 are the same. The ports corresponding to the same port index in RS resources 3, RS resources 7 and RS resources 11 are the same. The ports corresponding to the same port index in RS resources 4, RS resources 8 and RS resources 12 are the same. RS resources 1, RS resources 5 and RS resources 9 are quasi-co-located. RS resource 2, RS resource 6 and RS resource 10 are quasi-co-located. RS resource 3, RS resource 7 and RS resource 11 are quasi-co-located. RS resource 4, RS resource 8 and RS resource 12 are quasi-co-located.

[0245] It should be understood that the resource identifiers of RS resources in different RS sets may be discontinuous. The following is an example of the RS resource set shown in Table 1. The correspondence between the RS resource set and the RS resource and the RS set is shown in Table 6. Among them, the ports corresponding to the same port index in RS resource 2, RS resource 9 and RS resource 14 are the same, the ports corresponding to the same port index in RS resource 4, RS resource 10 and RS resource 15 are the same, the ports corresponding to the same port index in RS resource 6, RS resource 11 and RS resource 16 are the same, and the ports corresponding to the same port index in RS resource 8, RS resource 12 and RS resource 17 are the same.

[0246] Table 6

[0247]

[0248]

[0249] RS resource 2, RS resource 9 and RS resource 14 are quasi-co-located, RS resource 4, RS resource 10 and RS resource 15 are quasi-co-located, RS resource 6, RS resource 11 and RS resource 16 are quasi-co-located, RS resource 8, RS resource 12 and RS resource 17 are quasi-co-located.

[0250] In this way, the accuracy of the phase shift measured by the terminal can be improved, thereby further improving the accuracy of the phase compensation.

[0251] In a possible design scheme, RSs of each RS set in at least two RS sets are carried on RS resources of the same RS resource set.

[0252] The RS resource set includes multiple RS resources, and RSs of different RS sets are carried on different RS resources.

[0253] In this case, the RS resource set is periodically configured or semi-periodically configured, and RSs in one RS resource set are carried on RS resources in multiple periods of one RS resource set.

[0254] The following is an example with reference to Table 1. Fig.12 As shown, assuming that the RS resource set is configured in period 1 to period 3, and the RS resource set includes RS resource 1 to RS resource 4, then the RS in RS set 1 is carried on RS resource 1 in the RS resource set located in period 1 to period 3, the RS in RS set 2 is carried on RS resource 2 in the RS resource set located in period 1 to period 3, the RS in RS set 3 is carried on RS resource 3 in the RS resource set located in period 1 to period 3, and the RS in RS set 4 is carried on RS resource 4 in the RS resource set located in period 1 to period 3. It should be understood that the RS resources carrying the RS in the RS set here are only used for example. In actual implementation, there may be other possible implementation methods, for example, the RS in RS set 1 is carried on RS resource 2 in the RS resource set located in period 1 to period 3, which will not be repeated here. Among them, the correspondence between the period, RS resource set, RS resource and RS set is shown in Table 7.

[0255] Table 7

[0256]

[0257] S702, the terminal sends first information according to at least two RS sets. Correspondingly, each of the at least two network devices receives the first information sent by the terminal according to the at least two RS sets.

[0258] It is understandable that after receiving at least two RS sets, the terminal can measure the phase corresponding to the RS in the RS set according to each RS set in the at least two RS sets, and then obtain the phase difference corresponding to the two RS sets at the first moment according to the difference between the phases corresponding to the RS in the two RS sets, that is, the phase corresponding to the network device sending the RS set. In the embodiment of the present application, sending an RS set means sending the RS in the RS set. The phase corresponding to the RS set is the phase corresponding to the network device sending the RS set.

[0259] The first information is used to indicate the corresponding phase change amount between the RS sets in at least two RS sets at a first moment, wherein the first moment is a moment used as a reference.

[0260] The phase change amount corresponding to the RS sets in at least two RS sets is the phase change amount corresponding to the network devices in at least two network devices, or can be said to be the difference in phase shift between the network devices in at least two network devices.

[0261] At the first moment, the corresponding phase change between the RS sets in the at least two RS sets is the difference in phase shift between the network devices in the at least two network devices at the first moment. It should be understood that the phase shift of the network device at the first moment refers to the difference between the phase of the network device at the first moment and the phase at the second moment.

[0262] The second moment is a moment when the phases of each of the at least two network devices are the same.

[0263] The following is an example of network device 1 and network device 2. The phase shift of network device 1 between the first moment and the second moment is That is, the phase shift between the first moment and the second moment of the network device 2 is Then, at the first moment, the corresponding phase change between the RS sets in at least two RS sets is

[0264] Here, at the first moment, the corresponding phase change between the RS sets in at least two RS sets is For example only, in actual implementation, at the first moment, the corresponding phase change amount between the RS sets in at least two RS sets can also be

[0265] It should be understood that the difference in phase shift between the two network devices at the first moment can be determined based on the difference in phase between the two network devices at the first moment. For example, the difference in phase shift between the two network devices can be equal to the difference in phase between the two network devices at the first moment.

[0266] In a possible design scheme, the RS is a CSI-RS.

[0267] Optionally, the first moment is the end position of the last RS set before the CSI-RS in at least two RS sets. Alternatively, the first moment is the time domain position corresponding to the channel state information (CSI) reference resource. Alternatively, the first moment is the starting moment for reporting the first information. Alternatively, the first moment is the moment after the starting moment for reporting the first information, and the time length between the first moment and the moment for reporting the first information is the first time length. It should be understood that the above-mentioned end position, time domain position, start moment and moment can correspond to symbols, microslots, time slots, subframes, or frames in the time domain, etc., and this application does not limit this.

[0268] It should be understood that for each CSI report, the corresponding CSI-RS is determined by setting a fixed time, and the CSI measurement result is reported based on the corresponding CSI-RS. For example, the CSI reference resource is defined in the new radio (NR), which represents the time-frequency resources in several time slots before the time slot where the CSI report is located. The terminal device receives the reference signal before the CSI reference resource, and reports the CSI measurement result at the time domain position of the CSI report indicated by the network device. Then the terminal device needs to complete the calculation of the CSI measurement result within the interval between the time domain position corresponding to the CSI reference resource and the time domain position of the CSI report (i.e., the time used to calculate the CSI measurement result). Among them, the time domain position of the CSI report may refer to the time slot in which the terminal device reports (sends) the CSI to the network device. Or the time domain position of the CSI report may also include the subframe in which the CSI is reported, and the specific symbol in the time slot in which the CSI is reported.

[0269] The first moment is described below by taking at least two network devices including network device 1 and network device 2 as an example. Fig.13 As shown, network device 1 and network device 2 both send multiple RSs to the terminal, where the end time of network device 1 sending RS is t1, the end time of network device 2 sending RS is t2, the time domain position corresponding to the CSI reference resource is t3, the start time of the terminal reporting the first information is t4, and the time when the terminal receives the downlink signal of network device 1 and network device 2 is t5. If the first time is the end position of the last RS set before the CSI-RS in at least two RS sets, then the first time is Fig.13If the first moment is the time domain position corresponding to the CSI reference resource, then the first moment is the t3 moment. If the first moment is the starting moment of reporting the first information, then the first moment is the t4 moment. If the first moment is a moment after the starting moment of reporting the first information, and the time length between the first moment and the moment of reporting the first information is the first time length, then the first moment can be a moment at the first time length after the t4 moment.

[0270] The first time length may be less than or equal to the time length between t4 and t5, that is, t5-t4.

[0271] The following describes the corresponding phase change amounts between RS sets in at least two RS sets in combination with Cases 1 to 3.

[0272] Case 1, the corresponding phase change amount between the RS sets in at least two RS sets includes: the corresponding phase change amount between the first RS set and the second RS set. The second RS set is a preset RS set (also referred to as a reference RS set) in the at least two RS sets, and the first RS set is any RS set in the at least two RS sets except the second RS set. Exemplarily, the second RS set is a preset or reference RS set, which is predefined by the protocol, configured by the network device, or negotiated between the network device and the terminal device, and this application does not limit this.

[0273] That is to say, the phase change amount corresponding to the RS sets in at least two RS sets refers to the phase change amount between the phase corresponding to the phase of other RS ​​sets in at least two RS sets except the reference RS set, one of the at least two RS sets is used as the reference RS set and the phase corresponding to the reference RS set.

[0274] The following is an example of the RS set shown in Table 1. Fig.14 As shown in (a), the second RS set can be any one of RS set 1 to RS set 4, that is, RS set 1 to RS set 4 can be preset as the second RS set, and the first RS set is any one of RS set 1 to RS set 4 except the second RS set. Assuming that the second RS set is RS set 1, then the first RS set is any one of RS set 2, RS set 3 and RS set 4. The phase change amounts corresponding to the RS sets in at least two RS sets include: the phase change amount between RS set 2 and RS set 1, the phase change amount between RS set 3 and RS set 1, and the phase change amount between RS set 4 and RS set 1.

[0275] Case 2, the corresponding phase change amount between the RS sets in at least two RS sets includes: the corresponding phase change amount between the i-th RS set and the (i + 1)-th RS set in at least two RS sets. i is an integer, and 1 ≤ i < I, that is, i traverses from 1 to I - 1. Wherein, I is the total number of RS sets in at least two reference signal sets.

[0276] The following is an example in combination with the RS sets shown in Table 1. As Fig.14 shown in (b) of, the corresponding phase change amount between the RS sets in at least two RS sets includes: the corresponding phase change amount between RS set 2 and RS set 1, the corresponding phase change amount between RS set 3 and RS set 2, and the corresponding phase change amount between RS set 4 and RS set 3.

[0277] Case 3, the corresponding phase change amount between the RS sets in the above at least two RS sets is only for example. In actual implementation, the corresponding phase change amount between the RS sets in the above at least two RS sets may include the phase change amount between any two RS sets in at least two RS sets that can be obtained. For example, as Fig.14 shown in (c) of, the corresponding phase change amount between the RS sets in at least two RS sets may include: the phase change amount between RS set 1 and RS set 2, the phase change amount between RS set 1 and RS set 3, and the phase change amount between RS and 3 and RS set 4.

[0278] That is to say, the corresponding phase change amount between two reference signal sets can be calculated based on a preset reference signal set in at least two reference signal sets. In this way, when the number of reference signal sets is greater than or equal to three, the complexity of the first information can be simplified, thereby reducing resource overhead.

[0279] In a possible design, the corresponding phase change amount between the RS sets in at least two RS sets is related to the index of the frequency domain unit.

[0280] In this way, the corresponding phase change amount between the reference signal sets in at least two reference signal sets can be obtained for different frequency domain units respectively, so that the phase compensation accuracy can be further improved.

[0281] Optionally, the phase change amount at the first moment and the index of the frequency domain unit satisfy a linear relationship. This can simplify the reporting complexity of the phase change amount at the first moment and reduce the feedback overhead.

[0282] Furthermore, the phase change amount at the first moment and the index of the frequency domain unit satisfy the relationship shown in the following formula (28):

[0283] P1 = 2πρ + 2πkσ; (28)

[0284] Wherein, P1 is the phase change at the first moment, k is the index of the frequency domain unit, k is a positive integer greater than or equal to 0, ρ is a constant, and σ is a constant. It can be understood that ρ can be a parameter (such as phase shift) related to the frequency offset caused by carrier frequency offset and / or Doppler. σ is a parameter (such as phase shift) related to the frequency offset caused by sampling frequency offset and / or multipath delay.

[0285] The first information may directly indicate the phase change amount between the two reference signal sets, such as indicating P1 between the two reference signal sets. Alternatively, the first information may also indirectly indicate the phase change amount between the two reference signal sets, such as indicating ρ and σ between the two reference signal sets, or indicating 2πρ and 2πkσ between the two reference signal sets.

[0286] The following uses situation 1 as an example to illustrate the corresponding phase change amounts between RS sets in at least two RS sets at the first moment.

[0287] Assume that the first moment is t2, the carrier frequency offset and / or frequency offset caused by Doppler effect of network device 1 at t2 is ε′1, the frequency offset caused by sampling frequency offset and / or multipath delay is μ′1, and the phase corresponding to network device 1 at t2 is f 1,2 (k); The frequency offset caused by the carrier frequency offset and / or Doppler effect of network device 2 at time t1 is ε′2, the frequency offset caused by the sampling frequency offset and / or multipath delay is μ′2, and the phase corresponding to network device 2 at time t1 is f 2,1 (k).

[0288] The phase corresponding to network device 2 at time t2 satisfies the relationship shown in the following formula (29):

[0289] f 2,2 (k) = f 2,1 (k)+2π(ε′2+kΔ f μ′2)(t2-t1); (29)

[0290] Then, the phase change between the phase corresponding to network device 1 at time t2 and the phase corresponding to network device 2 at time t2 satisfies the relationship shown in the following formula (30):

[0291] f 1,2 (k)-(f 2,1 (k)+2π(ε′2+kΔ f μ′2)(t2-t1))=-2πε′2(t2-t1)+f 1,2 (k)-(f 2,1 (k)+2π(kΔ fμ′2)(t2-t1))=2πρ+2πkσ; (30)

[0292] In this case, ρ = -ε′2(t2-t1), σ = (f 1,2 (k)-f 2,1 (k)+2π(kΔ f μ′2)(t2-t1)))) / 2π.

[0293] Similarly, the phase change amount between the network device 3 and the network device 1 and the phase change amount between the network device 4 and the network device 1 at the first moment can be obtained.

[0294] It can be understood that in case 2, similarly, the phase change between network device 2 and network device 1 at the first moment, the phase change between network device 3 and network device 2, and the phase change between network device 4 and network device 3 at the first moment can be obtained.

[0295] In case 3, similarly, the phase change between network device 2 and network device 1, the phase change between network device 3 and network device 1, and the phase change between network device 4 and network device 3 at the first moment can be obtained.

[0296] It should be understood that the above formula (30) in the embodiment of the present application, the method of calculating the phase change amount between at least two network devices is only used as an example, and in actual implementation, other methods are also used for calculation. Still taking network device 1 and network device 2 as an example, the phase change amount between the phase corresponding to network device 2 at time t2 and the phase corresponding to network device 1 at time t2 can be calculated, and the calculation principle is similar to that in formula (30), the difference is that the phase change amount between the phase corresponding to network device 2 at time t2 and the phase corresponding to network device 1 at time t2 is the inverse of the phase change amount between the phase corresponding to network device 1 at time t2 and the phase corresponding to network device 2 at time t2.

[0297] In addition, the first moment may also be moment t1. When the first moment is moment t1, the principle of calculating the phase change between network device 2 and network device 1 is similar to that when the first moment is moment t2, and will not be repeated here.

[0298] In the embodiment of the present application, the phase corresponding to the network device is the phase of the signal sent by the network device, which will not be repeated here.

[0299] The phase change amount corresponding to the two reference signals is, that is, the phase change amount corresponding to the network devices corresponding to the two reference signals.

[0300] The terminal sends the first information according to at least two RS sets, or in other words, the terminal sends the first information according to the RS set corresponding to each network device in the at least two network devices.

[0301] S703: A network device among at least two network devices performs phase compensation according to the first information.

[0302] In a possible design scheme, S703 may include: a network device in at least two network devices performs phase compensation according to a phase change amount between reference signal sets in at least two reference signal sets indicated by the first information.

[0303] In some optional designs, some of the at least two network devices may perform phase compensation according to the phase change amount between reference signal sets in at least two reference signal sets indicated by the first information. Alternatively, in some optional designs, all of the at least two network devices may perform phase compensation according to the phase change amount between reference signal sets in at least two reference signal sets indicated by the first information.

[0304] It should be understood that the terminal may also feed back third information indicating a phase shift difference between two network devices of the at least two network devices to the at least two network devices.

[0305] The third information may include Δε and Δμ between two network devices in at least two network devices. For the implementation principle of the third information, please refer to Figure 3 The relevant introduction about the information used to indicate Δε and Δμ will not be repeated here.

[0306] The following uses examples to illustrate how to perform phase compensation in combination with the above cases 1 to 3.

[0307] In case 1, the reference RS set, such as the network device corresponding to RS set 1, may not perform phase compensation, and among the at least two network devices, the network device other than the reference RS set performs phase compensation according to the first information.

[0308] Combining Table 1 and Fig.14 Taking (a) in FIG. 1 as an example, assuming that network device 1 corresponds to RS set 1 and the reference RS set is RS set 1, phase compensation can be performed from network device 2 to network device 3, and network device 1 does not perform phase compensation. The following further describes the phase compensation performed by network device 2.

[0309] Taking the phase difference between network device 1 and network device 2 at the first moment as an example, assuming that the moment when network device 1 and network device 2 send downlink signals is moment t4, then the phase compensated by network device 2 can satisfy the relationship shown in the following formula (31):

[0310]

[0311] in, The phase compensated for by network device 2.

[0312] Assuming that at time t0, the signal received by the terminal satisfies the relationship shown in formula (18), then at time t4, network device 1 or network device 2 can compensate on the precoding vector at the corresponding time. Taking the example that network device 2 can compensate on the precoding vector at the corresponding time, in this case, the signal received by the terminal at time t4 satisfies the relationship shown in the following formula (32):

[0313]

[0314] It can be understood that the phase compensated by the above formula (32) can also be compensated by the network device 1. In this case, the phase compensated by the network device 1 is The network device 1 performs compensation on the precoding vector, then the signal received by the terminal at time t4 satisfies the relationship shown in the following formula (33):

[0315]

[0316] In addition, the phase change amount between at least two network devices calculated in S702 is the phase change amount between the phase corresponding to network device 2 at time t2 and the phase corresponding to network device 1 at time t2. Then, the phase difference between the phase of network device 2 and the phase corresponding to network device 1 can still be obtained. In this case, phase compensation can still be performed according to formula (32) or formula (33).

[0317] It should be understood that The smaller the value of is, the higher the accuracy of phase compensation is. Then, the complete coherence of the received signal can be achieved, that is, the most accurate phase compensation can be achieved. The principle of phase compensation performed by network device 3 and network device 4 is similar to that of network device 2, and will not be described in detail here.

[0318] The above phase compensation method for situation 1 is only used as an example. In actual implementation, network device 2 may not perform phase compensation, while network device 1, network device 3, and network device 4 may perform phase compensation.

[0319] In case 2, the RS set corresponding to one of the at least two network devices may be used as the reference RS set, and each network device other than the network device corresponding to the reference RS set may calculate the corresponding phase shift between its corresponding RS set and the reference RS set based on the first information. Fig.14 Taking (b) in FIG. 1 as an example, RS set 2 is the reference RS set, then network device 1 can obtain the phase change between RS set 1 and RS set 2, and then perform phase compensation. The principle of phase compensation can be referred to as shown in formula (32), which will not be repeated here. Similarly, network device 3 and network device 4 can perform phase compensation.

[0320] It should be understood that, in the case where the first information indirectly indicates the phase change amount between the two reference signal sets, before executing S703, the network device may first determine the phase change amount between the reference signal sets in the at least two reference signal sets according to the first information. For example, if the first information indirectly indicates ρ and σ between the two reference signal sets, the network device may determine the phase change amount between the reference signal sets in the at least two reference signal sets according to formula (28).

[0321] It can be understood that in the embodiments of the present application, Figure 7 The provided method may further include: at least one of the at least two network devices sends second information to the terminal. Correspondingly, the terminal receives the second information sent by at least one of the at least two network devices.

[0322] The second information is used to indicate indication information of a reference resource set carrying at least two reference signal sets.

[0323] In some possible designs, the network device that sends the second information may be a primary network device, such as a primary base station.

[0324] In some possible designs, the network device that sends the second information may be a secondary network device, such as a secondary base station.

[0325] In some possible designs, the second information may be sent by at least two network devices together. For example, different network devices in the at least two network devices may send partial information of the second information. Information sent by all network devices in the at least two network devices may obtain the complete second information.

[0326] based on Figure 7 According to the provided method, the terminal can perform phase measurement based on at least two reference signal sets, and send the corresponding phase change amount between the reference signal sets in at least two reference signal sets at the first moment, that is, the phase change amount between multiple network devices providing services to the terminal in a collaborative scenario. At different moments, the phase change amount between the multiple network devices provided by the terminal may be different. The network device can perform phase compensation on the downlink signal in combination with the corresponding phase change amount between the reference signal sets in at least two reference signal sets at the first moment reported by the terminal, thereby improving the accuracy of the phase compensation and improving the CJT transmission effect.

[0327] To facilitate understanding of the beneficial effects of the embodiments of the present application, the beneficial effects of the embodiments of the present application are illustrated below with reference to network device 1 and network device 2.

[0328] Fig.15 Schematic diagram of the phase compensation of network device 2. Fig.15 As shown, when the phase shift calculated by formula (17) is used for phase compensation, the compensated phase is the phase shift of network device 1 relative to network device 2 between time t0+Δt and time t0, that is, Using the solution of the embodiment of the present application, assuming that the first moment is t0, the compensated phase includes the phase shift of network device 1 relative to network device 2 between the first moment and the moment when the downlink signal is sent, and the phase shift of network device 1 relative to network device 2 between the first moment and the moment when there is no phase shift between network device 1 and network device 2, that is, It can be seen that the method provided in the embodiment of the present application can achieve more phase compensation, thereby improving the accuracy of phase compensation.

[0329] Combination of the above Figure 7-Figure 15 The phase compensation method provided by the embodiment of the present application is described in detail. Fig.16 and Fig.17 A communication device for executing the phase compensation method provided in an embodiment of the present application is described in detail.

[0330] For example, Fig.16 This is a schematic diagram of the structure of the communication device provided in the embodiment of the present application. Figure 1 .like Fig.16 As shown, the communication device 1600 includes: a processing module 1601 and a transceiver module 1602. For ease of description, Fig.16 Only the main components of the communication device 1600 are shown.

[0331] In some embodiments, the communication device 1600 may be adapted to Figure 5 In the communication system shown in FIG. , execution Figure 7 The function of the terminal in the phase compensation method shown in .

[0332] The transceiver module 1602 is configured to receive at least two RS sets, wherein each of the at least two RS sets includes at least one RS.

[0333] The processing module 1601 is configured to generate first information. The first information is used to indicate the corresponding phase change amount between RS sets in at least two RS sets at a first moment.

[0334] The transceiver module 1602 is further configured to send first information according to at least two RS sets.

[0335] In a possible design, the phase change amount corresponding to the RS sets in at least two RS sets includes: the phase change amount corresponding to the first RS set and the second RS set. Wherein, the second RS set is a preset RS set among at least two RS sets, and the first RS set is any RS set among at least two RS sets other than the second RS set.

[0336] In a possible design, the phase change amount corresponding to the RS sets in at least two RS sets includes: the phase change amount corresponding to the i-th RS set and the (i + 1)-th RS set in at least two RS sets. i is an integer, and 1 ≤ i < I. Wherein, I is the total number of reference signal sets in at least two reference signal sets.

[0337] In a possible design, the phase change amount corresponding to the RS sets in at least two RS sets is related to the index of the frequency domain unit.

[0338] Optionally, the phase change amount at the first moment satisfies a linear relationship with the index of the frequency domain unit.

[0339] Furthermore, the phase change amount at the first moment satisfies the following relationship: P1 = 2πρ + 2πkσ. Wherein, P1 is the phase change amount at the first moment, k is the index of the frequency domain unit, k is a positive integer greater than or equal to 0, ρ is a constant, and σ is a constant.

[0340] In a possible design, RS is channel state information CSI-RS.

[0341] Optionally, the first moment is the end position of the last RS set among at least two RS sets before the CSI reference resource. Or, the first moment is the time domain position corresponding to the CSI reference resource. Or, the first moment is the start time of reporting the first information. Or, the first moment is a time after the start time of reporting the first information, and the time length between the first moment and the time of reporting the first information is the first time length.

[0342] In a possible design, the RS of each RS set in at least two RS sets is carried on the RS resources of the same RS resource set. Wherein, the RS resource set includes multiple RS resources.

[0343] Optionally, among the multiple RS resources in the RS resource set, the ports corresponding to the same port index are the same. And / or, the multiple RS resources in the RS resource set are quasi-co-located.

[0344] In a possible design, RSs of different RS sets in at least two RS sets are respectively carried on RS resources of different RS resource sets, where the RS resource set includes one RS resource.

[0345] In a possible design scheme, RSs of each RS set in at least two RS sets are carried on RS resources of multiple RS resource sets.

[0346] Optionally, there is at least one RS resource with the same resource identifier in each of the multiple RS resource sets.

[0347] Alternatively, optionally, the RS resources in multiple RS resource sets are arranged based on a resource identifier order, and the ports corresponding to the same port index of RS resources with the same arrangement order in different RS resource sets are the same, and / or, RS resources with the same arrangement order in different RS resource sets are quasi-co-located.

[0348] In a possible design, RSs of each RS set in at least two RS sets are carried on RS resources of the same RS resource set, wherein the RS resource set includes multiple RS resources, and RSs of different RS sets are carried on different RS resources.

[0349] Optionally, the transceiver module 1602 may include a receiving module and a sending module ( Fig.16 The transceiver module 1602 is used to implement the sending function and the receiving function of the communication device 1600.

[0350] Optionally, the communication device 1600 may further include a storage module ( Fig.16 (not shown in the figure), the storage module stores a program or instruction. When the processing module 1601 executes the program or instruction, the communication device 1600 can execute Figure 7 The function of the terminal in the phase compensation method shown in any one of the items.

[0351] It should be understood that the processing module 1601 involved in the communication device 1600 can be implemented by a processor or a processor-related circuit component, which can be a processor or a processing unit; the transceiver module 1602 can be implemented by a transceiver or a transceiver-related circuit component, which can be a transceiver or a transceiver unit.

[0352] It should be noted that the communication device 1600 may be a terminal, or a chip (system) or other parts or components that can be set in a terminal, or a device including a terminal, which is not limited in this application.

[0353] In addition, the technical effects of the communication device 1600 can be referred to Figure 7 The technical effects of the phase compensation method shown in any one of the items will not be repeated here.

[0354] In some other embodiments, the communication device 1600 may be applicable to Figure 5 the communication system shown in Figure 7 and perform the functions of the network device in the phase compensation method shown in

[0355] Among them, the processing module 1601 is used to generate a set of RSs. The set of RSs includes at least one RS.

[0356] The transceiver module 1602 is used to send the set of RSs to the terminal.

[0357] The transceiver module 1602 is further used to receive the first information sent by the terminal according to at least two sets of RSs. The first information is used to indicate the phase change amount corresponding to the sets of RSs in at least two sets of RSs at the first moment.

[0358] In a possible design, the phase change amount corresponding to the sets of RSs in at least two sets of RSs includes: the phase change amount corresponding to the first set of RSs and the second set of RSs. Among them, the second set of RSs is a preset set of RSs in at least two sets of RSs, and the first set of RSs is any set of RSs other than the second set of RSs in at least two sets of RSs.

[0359] In a possible design, the phase change amount corresponding to the sets of RSs in at least two sets of RSs includes: the phase change amount corresponding to the i-th set of RSs and the (i + 1)-th set of RSs in at least two sets of RSs. i is an integer, and 1 ≤ i < I. Among them, I is the total number of sets of RSs in at least two sets of RSs.

[0360] In a possible design, the phase change amount corresponding to the sets of RSs in at least two sets of RSs is related to the index of the frequency domain unit.

[0361] Optionally, the phase change amount at the first moment and the index of the frequency domain unit satisfy a linear relationship.

[0362] Further, the phase change amount at the first moment and the index of the frequency domain unit satisfy the following relationship: P1 = 2πρ + 2πkσ. Among them, P1 is the phase change amount at the first moment, k is the index of the frequency domain unit, k is a positive integer greater than or equal to 0, ρ is a constant, and σ is a constant.

[0363] In a possible design, the RS is a CSI-RS.

[0364] In a possible design scheme, the first moment is the end position of the last RS set before the CSI reference resource in at least two RS sets. Alternatively, the first moment is the time domain position corresponding to the CSI reference resource. Alternatively, the first moment is the starting moment of reporting the first information. Alternatively, the first moment is the moment after the starting moment of reporting the first information, and the time length between the first moment and the moment of reporting the first information is the first time length.

[0365] In a possible design, the RSs of each RS set in at least two RS sets are carried on RS resources of the same RS resource set, wherein the RS resource set includes multiple RS resources.

[0366] Optionally, among the multiple RS resources in the RS resource set, the ports corresponding to the same port index are the same. Alternatively, the multiple RS resources in the RS resource set are quasi-co-located.

[0367] In a possible design, RSs of different RS sets in at least two RS sets are respectively carried on RS resources of different RS resource sets, where the RS resource set includes one RS resource.

[0368] In a possible design scheme, RSs of each RS set in at least two RS sets are carried on RS resources of multiple RS resource sets.

[0369] Optionally, there is at least one RS resource with the same resource identifier in each RS resource of the multiple RS resource sets.

[0370] Alternatively, optionally, the RS resources in multiple RS resource sets are arranged based on a resource identifier order, and the ports corresponding to the same port index of RS resources with the same arrangement order in different RS resource sets are the same, and / or, RS resources with the same arrangement order in different RS resource sets are quasi-co-located.

[0371] In a possible design, RSs of each RS set in at least two RS sets are carried on RS resources of the same RS resource set, wherein the RS resource set includes multiple RS resources, and RSs of different RS sets are carried on different RS resources.

[0372] In a possible design scheme, the processing module 1601 is further used to perform phase compensation according to the first information.

[0373] Optionally, the transceiver module 1602 may include a receiving module and a sending module ( Fig.16 The transceiver module 1602 is used to implement the sending function and the receiving function of the communication device 1600.

[0374] Optionally, the communication device 1600 may further include a storage module ( Fig.16 (not shown in the figure), the storage module stores a program or instruction. When the processing module 1601 executes the program or instruction, the communication device 1600 can execute Figure 7 The function of the network device in the phase compensation method shown in any one of the items.

[0375] It should be understood that the processing module 1601 involved in the communication device 1600 can be implemented by a processor or a processor-related circuit component, which can be a processor or a processing unit; the transceiver module 1602 can be implemented by a transceiver or a transceiver-related circuit component, which can be a transceiver or a transceiver unit.

[0376] It should be noted that the communication device 1600 can be a network device, or a chip (system) or other parts or components that can be set in the network device, or a device that includes a network device, which is not limited in this application.

[0377] In addition, the technical effects of the communication device 1600 can be referred to Figure 7 The technical effects of the phase compensation method shown in any one of the items will not be repeated here.

[0378] For example, Fig.17 A schematic diagram of the structure of the communication device provided in the embodiment of the present application Figure 2 The communication device may be a terminal or a network device, or may be a chip (system) or other component or assembly that can be arranged in the terminal or the network device. Fig.17 As shown, the communication device 1700 may include a processor 1701. Optionally, the communication device 1700 may also include a memory 1702 and / or a transceiver 1703. The processor 1701 is coupled with the memory 1702 and the transceiver 1703, such as being connected via a communication bus.

[0379] Combine the following Fig.17 The components of the communication device 1700 are described in detail:

[0380] The processor 1701 is the control center of the communication device 1700, and may be a processor or a general term for multiple processing elements. For example, the processor 1701 is one or more central processing units (CPUs), or may be an application specific integrated circuit (ASIC), or may be configured to implement one or more integrated circuits of the embodiments of the present application, such as one or more digital signal processors (DSPs), or one or more field programmable gate arrays (FPGAs).

[0381] Optionally, the processor 1701 may perform various functions of the communication device 1700 by running or executing a software program stored in the memory 1702 , and calling data stored in the memory 1702 .

[0382] In a specific implementation, as an embodiment, the processor 1701 may include one or more CPUs, such as Fig.17 CPU0 and CPU1 are shown in FIG.

[0383] In a specific implementation, as an embodiment, the communication device 1700 may also include multiple processors, such as Fig.17 1701 and 1704 are shown in FIG. Each of these processors may be a single-CPU or a multi-CPU. A processor herein may refer to one or more devices, circuits, and / or processing cores for processing data (e.g., computer program instructions).

[0384] Among them, the memory 1702 is used to store the software program for executing the solution of the present application, and the execution is controlled by the processor 1701. The specific implementation method can refer to the above method embodiment and will not be repeated here.

[0385] Optionally, the memory 1702 may be a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, a random access memory (RAM) or other types of dynamic storage devices that can store information and instructions, or an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compressed optical disc, laser disc, optical disc, digital versatile disc, Blu-ray disc, etc.), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store the desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto. The memory 1702 may be integrated with the processor 1701, or may exist independently and be communicated to the processor 1701 through the interface circuit ( Fig.17 ) is coupled to the processor 1701, which is not specifically limited in the embodiments of the present application.

[0386] The transceiver 1703 is used for communication with other communication devices. For example, if the communication device 1700 is a terminal, the transceiver 1703 can be used to communicate with a network device, or with another terminal. For another example, if the communication device 1700 is a network device, the transceiver 1703 can be used to communicate with a terminal, or with another network device.

[0387] Optionally, the transceiver 1703 may include a receiver and a transmitter ( Fig.17 The receiver is used to implement a receiving function, and the transmitter is used to implement a sending function.

[0388] Optionally, the transceiver 1703 may be integrated with the processor 1701, or may exist independently and communicate with the processor 1701 through the interface circuit ( Fig.17 ) is coupled to the processor 1701, which is not specifically limited in the embodiments of the present application.

[0389] It should be noted that Fig.17 The structure of the communication device 1700 shown in the figure does not constitute a limitation on the communication device. The actual communication device may include more or fewer components than those shown in the figure, or combine certain components, or arrange the components differently.

[0390] In addition, the technical effects of the communication device 1700 can refer to the technical effects of the phase compensation method described in the above method embodiment, which will not be repeated here.

[0391] It should be understood that the processor in the embodiment of the present application may be a CPU, and the processor may also be other general-purpose processors, DSPs, ASICs, FPGAs or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0392] It should also be understood that the memory in the embodiment of the present application can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memory. Among them, the non-volatile memory can be a ROM, a programmable read-only memory (programmable ROM, PROM), an erasable programmable read-only memory (erasable PROM, EPROM), an EEPROM or a flash memory. The volatile memory can be a RAM, which is used as an external cache. By way of example but not limitation, many forms of RAM are available, such as static random access memory (static RAM, SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (doubledata rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory (synchlink DRAM, SLDRAM) and direct memory bus random access memory (direct rambus RAM, DR RAM).

[0393] The above embodiments can be implemented in whole or in part by software, hardware (such as circuits), firmware or any other combination. When implemented using software, the above embodiments can 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 or computer programs. When the computer instructions or computer programs are loaded or executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website site, computer, server or data center to another website site, computer, server or data center by wired (such as infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that contains one or more available media sets. The available medium can be a magnetic medium (for example, a floppy disk, a hard disk, a tape), an optical medium (for example, a DVD), or a semiconductor medium. The semiconductor medium can be a solid-state hard disk.

[0394] It should be understood that the term "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. A and B can be singular or plural. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship, but it may also indicate an "and / or" relationship. Please refer to the context for specific understanding.

[0395] In this application, "at least one" means one or more, and "more than one" means two or more. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can be represented by: a, b, c, ab, ac, bc, or abc, where a, b, c can be single or multiple.

[0396] It should be understood that in the various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0397] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0398] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0399] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0400] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0401] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0402] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as USB flash drives, mobile hard drives, ROM, RAM, magnetic disks, or optical disks.

[0403] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A phase compensation method, characterized in that: The method includes: The terminal receives at least two sets of reference signals; wherein, each set of reference signals in the at least two sets of reference signals includes at least one reference signal; The terminal sends first information according to the at least two sets of reference signals; the first information is used to indicate, at a first moment, the corresponding phase change amount between the sets of reference signals in the at least two sets of reference signals.

2. The method according to claim 1, characterized in that The corresponding phase change amount between the sets of reference signals in the at least two sets of reference signals includes: the corresponding phase change amount between a first set of reference signals and a second set of reference signals; wherein, the second set of reference signals is a preset set of reference signals in the at least two sets of reference signals, and the first set of reference signals is any set of reference signals in the at least two sets of reference signals other than the second set of reference signals.

3. The method according to claim 1, characterized in that The corresponding phase change amount between the sets of reference signals in the at least two sets of reference signals includes: the corresponding phase change amount between the i-th set of reference signals and the (i + 1)-th set of reference signals in the at least two sets of reference signals; i is an integer, and 1 ≤ i < I; wherein, I is the total number of sets of reference signals in the at least two sets of reference signals.

4. The method according to any one of claims 1 to 3, characterized in that The corresponding phase change amount between the sets of reference signals in the at least two sets of reference signals is related to the index of the frequency domain unit.

5. The method according to claim 4, characterized in that The phase change amount at the first moment and the index of the frequency domain unit satisfy a linear relationship.

6. The method according to claim 5, characterized in that: The phase change amount at the first moment and the index of the frequency domain unit satisfy the relationship shown as follows: P1 = 2πρ + 2πkσ; Wherein, P1 is the phase change amount at the first moment, k is the index of the frequency domain unit, k is a positive integer greater than or equal to 0, ρ is a constant, and σ is a constant.

7. The method according to any one of claims 1 to 6, characterized in that The reference signal is a channel state information reference signal CSI-RS.

8. The method according to claim 7, characterized in that The first moment is the end position of the last set of reference signals among the at least two sets of reference signals that is before the channel state information CSI reference resource; or, The first moment is the time domain position corresponding to the CSI reference resource; or, The first moment is the start moment of reporting the first information; or, The first moment is a moment after the start moment of reporting the first information, and the time length between the first moment and the moment of reporting the first information is a first time length.

9. The method according to any one of claims 1 to 8, characterized in that The reference signals in each set of reference signals in the at least two sets of reference signals are carried on the reference signal resources of the same reference signal resource set; wherein, the reference signal resource set includes multiple reference signal resources.

10. The method according to claim 9, characterized in that Among the multiple reference signal resources in the reference signal resource set, the ports corresponding to the same port index are the same; and / or, the multiple reference signal resources in the reference signal resource set are quasi-co-located.

11. The method according to any one of claims 1 to 8, characterized in that The reference signals of different sets of reference signals in the at least two sets of reference signals are respectively carried on the reference signal resources of different reference signal resource sets; wherein, the reference signal resource set includes one reference signal resource.

12. The method according to any one of claims 1 to 8, characterized in that The reference signals of each of the at least two reference signal sets are carried on the reference signal resources of a plurality of reference signal resource sets.

13. The method according to claim 12, characterized in that In each of the plurality of reference signal resource sets, there is at least one reference signal resource with the same resource identifier.

14. The method according to claim 12, characterized in that The reference signal resources in the plurality of reference signal resource sets are arranged based on the order of the resource identifiers. For the reference signal resources with the same arrangement order in different reference signal resource sets, the ports corresponding to the same port index are the same, and / or the reference signal resources with the same arrangement order in different reference signal resource sets are quasi-co-located.

15. The method according to any one of claims 1 to 8, characterized in that The reference signals of each of the at least two reference signal sets are carried on the reference signal resources of the same reference signal resource set; wherein, the reference signal resource set includes a plurality of reference signal resources, and the reference signals of different reference signal sets are carried on different reference signal resources.

16. A phase compensation method, characterized in that: The method includes: The network device sends a first reference signal set to the terminal; the first reference signal set includes at least one reference signal. The network device receives first information sent by the terminal according to at least two reference signal sets; the at least two reference signal sets include the first reference signal set; the first information is used to indicate the phase change amount corresponding between the reference signal sets in the at least two reference signal sets at a first moment.

17. The method according to claim 16, characterized in that The phase change amount between the reference signal sets in the at least two reference signal sets includes: the phase change amount corresponding between the first reference signal set and the second reference signal set; wherein, the second reference signal set is a preset reference signal set in the at least two reference signal sets, and the first reference signal set is any one of the at least two reference signal sets other than the second reference signal set.

18. The method according to claim 16, characterized in that The phase change amount corresponding between the reference signal sets in the at least two reference signal sets includes: the phase change amount corresponding between the i-th reference signal set and the (i + 1)-th reference signal set in the at least two reference signal sets; i is an integer, and 1 ≤ i < I; wherein, I is the total number of reference signal sets in the at least two reference signal sets.

19. The method according to any one of claims 16 to 18, characterized in that: The phase change amount corresponding between the reference signal sets in the at least two reference signal sets is related to the index of the frequency domain unit.

20. The method according to claim 19, characterized in that The phase change amount at the first moment and the index of the frequency domain unit satisfy a linear relationship.

21. The method according to claim 20, characterized in that: The phase change amount at the first moment and the index of the frequency domain unit satisfy the relationship shown as follows: P1 = 2πρ + 2πkσ; Wherein, P1 is the phase change amount at the first moment, k is the index of the frequency domain unit, k is a positive integer greater than or equal to 0, ρ is a constant, and σ is a constant.

22. The method according to any one of claims 16 to 21, characterized in that The reference signal is a channel state information reference signal CSI-RS.

23. The method according to any one of claims 16 to 22, characterized in that The first moment is the end position of the last reference signal set among the at least two reference signal sets that is before the channel state information CSI reference resource; or, The first moment is the time domain position corresponding to the CSI reference resource; or, The first time is the starting time of reporting the first information; or, The first moment is a moment after a start moment of reporting the first information, and a time length between the first moment and a moment of reporting the first information is a first time length.

24. The method according to any one of claims 16 to 23, characterized in that The reference signals of each reference signal set in the at least two reference signal sets are carried on reference signal resources of the same reference signal resource set; wherein the reference signal resource set includes multiple reference signal resources.

25. The method according to claim 24, characterized in that Among the multiple reference signal resources in the reference signal resource set, ports corresponding to the same port index are the same; or, the multiple reference signal resources in the reference signal resource set are quasi-co-located.

26. The method according to any one of claims 16 to 23, characterized in that Reference signals of different reference signal sets in the at least two reference signal sets are respectively carried on reference signal resources of different reference signal resource sets; wherein the reference signal resource set includes one reference signal resource.

27. The method according to any one of claims 1 to 3, characterized in that: The reference signal of each reference signal set in the at least two reference signal sets is carried on reference signal resources of multiple reference signal resource sets.

28. The method according to claim 27, characterized in that Among each reference signal resource in the plurality of reference signal resource sets, there is at least one reference signal resource with the same resource identifier.

29. The method according to claim 27, characterized in that The reference signal resources in the multiple reference signal resource sets are arranged based on the order of resource identifiers, and the ports corresponding to the same port index of reference signal resources with the same arrangement order in different reference signal resource sets are the same, and / or the reference signal resources with the same arrangement order in different reference signal resource sets are quasi-co-located.

30. The method according to any one of claims 16 to 23, characterized in that The reference signals of each reference signal set in the at least two reference signal sets are carried on reference signal resources of the same reference signal resource set; wherein the reference signal resource set includes multiple reference signal resources, and reference signals of different reference signal sets are carried on different reference signal resources.

31. The method according to any one of claims 16 to 30, characterized in that The method further comprises: The network device performs phase compensation according to the first information.

32. A communication device, characterized in that: The communication device is used to execute the phase compensation method according to any one of claims 1 to 15, or the communication device is used to execute the phase compensation method according to any one of claims 16 to 31.

33. A communication device, characterized in that: include: Processor and memory; The memory is used to store computer instructions. When the processor executes the instructions, the communication device executes the phase compensation method as described in any one of claims 1-15, or executes the phase compensation method as described in any one of claims 16-31.

34. A communication device, characterized in that: include: processor and interface circuit; wherein, The interface circuit is used to receive code instructions and transmit them to the processor; The processor is used to run the code instructions to execute the phase compensation method according to any one of claims 1-15, or to execute the phase compensation method according to any one of claims 16-31.

35. A communication device, characterized in that: The communication device includes a processor and a transceiver, the transceiver is used to exchange information between the communication device and other communication devices, and the processor executes program instructions to execute the phase compensation method as described in any one of claims 1-15, or executes the phase compensation method as described in any one of claims 16-31.

36. The communication device according to any one of claims 32 to 35, characterized in that: The communication device is a chip.

37. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes a computer program or instructions, and when the computer program or instructions are executed on a computer, the computer is enabled to execute the phase compensation method according to any one of claims 1 to 15, or to execute the phase compensation method according to any one of claims 16 to 31.

38. A computer program product, characterized in that The computer program product comprises: a computer program or instructions, which, when executed on a computer, enables the computer to execute the phase compensation method according to any one of claims 1 to 15, or to execute the phase compensation method according to any one of claims 16 to 31.

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