CN111511010B

CN111511010B - Method and device for sending and receiving indication

Info

Publication number: CN111511010B
Application number: CN201910098040.7A
Authority: CN
Inventors: 纪刘榴; 王潇涵; 杭海存; 葛士斌; 毕晓艳
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-01-31
Filing date: 2019-01-31
Publication date: 2021-09-14
Anticipated expiration: 2039-01-31
Also published as: WO2020155849A1; CN111511010A

Abstract

The application provides a method for sending and receiving indication, which comprises the following steps: the terminal equipment receives first indication information, wherein the first indication information is used for indicating at least one first reference signal and at least one second reference signal to be associated with synchronous measurement; and performing synchronous measurement on the at least one first reference signal and the at least one second reference signal according to the first indication information. Through synchronous measurement, the terminal equipment can accurately know whether the transmission of at least one first reference signal and at least one second reference signal is synchronous or not, so that the performance of cooperative transmission is ensured.

Description

Method and device for sending and receiving indication

Technical Field

The present application relates to the field of wireless communications, and more particularly, to methods and apparatus for transmitting and receiving indications.

Background

The rapid development of mobile communication puts higher requirements on the performance of cell edge users, and in a communication system, along with the rapid development of mobile communication, the mobile communication has higher requirements on various aspects such as system capacity, instantaneous peak rate, spectrum efficiency, cell edge user throughput, time delay and the like. The CoMP transmission technology can improve system performance both in uplink and downlink, and is a method for solving the inter-cell interference problem and improving the throughput of users at the cell edge, especially improving the spectrum efficiency at the cell edge.

The coordinated multipoint technology includes coordinated beamforming (coordinated scheduling), coordinated scheduling (coordinated scheduling), joint transmission (joint transmission), dynamic transmission point selection (dynamic point selection), and dynamic transmission point muting (dynamic point muting). The base stations or the TRPs can interact through a backhaul, an air interface and other ways, and coordinate to transmit the required information. By the transmission methods, the interference to edge users can be reduced, and the performance of the system can be improved.

In CoMP technology, multiple transmission and reception points (multi-TRPs) may serve the same terminal device at the same time. When multi-TRP is coordinated, multiple stations are required to transmit synchronously in order to achieve the performance of joint transmission, but in the actual transmission process, the synchronization between TRPs is actually realized with great complexity, and if the synchronization between multiple stations is assumed, the performance of channel estimation and coordinated transmission is affected. How to accurately acquire the synchronization state to guarantee the performance of cooperative transmission is an urgent problem to be solved.

Disclosure of Invention

The application provides a method and a device for sending and receiving indication, so as to guarantee the performance of cooperative transmission.

In a first aspect, a method of receiving an indication is provided. The method may be executed by the terminal device, or may also be executed by a chip configured in the terminal device, which is not limited in this application.

Specifically, the method comprises the following steps: the terminal equipment receives first indication information from network equipment, wherein the first indication information is used for indicating at least one first reference signal and at least one second reference signal to be associated with synchronous measurement; the terminal equipment carries out synchronous measurement on the at least one first reference signal and the at least one second reference signal according to the first indication information; wherein the first indication information includes transmission configuration indication status TCI state information indicating that reference signal resources corresponding to the at least one first reference signal and reference signal resources corresponding to the at least one second reference signal have a quasi-co-located QCL relationship.

Therefore, the terminal device receives the first indication information, performs synchronous measurement on the at least one first reference signal and the at least one second reference signal according to the indication of the first indication information, and can accurately acquire the transmission synchronization state (such as synchronization deviation) of the at least one first reference signal and the at least one second reference signal through the synchronous measurement, thereby ensuring the performance of cooperative transmission.

In a second aspect, a method of transmitting an indication is provided. The method may be performed by a network device, or may be performed by a chip configured in the network device, which is not limited in this application.

Specifically, the method comprises the following steps: the network equipment generates first indication information, wherein the first indication information is used for indicating at least one first reference signal and at least one second reference signal to be associated with synchronous measurement; the network equipment sends the first indication information to terminal equipment; wherein the first indication information includes transmission configuration indication status TCI state information indicating that reference signal resources corresponding to the at least one first reference signal and reference signal resources corresponding to the at least one second reference signal have a quasi-co-located QCL relationship.

Therefore, the network device may instruct the terminal device to perform associated synchronization measurement on the at least one first reference signal and the at least one second reference signal, so that the terminal device can perform measurement to accurately obtain the transmission synchronization state (e.g., synchronization deviation) of the at least one first reference signal and the at least one second reference signal, thereby ensuring the performance of cooperative transmission.

With reference to the first aspect, in some possible implementations, the method further includes: and the terminal equipment sends second indication information to the network equipment, wherein the second indication information is used for indicating the result of the synchronous measurement.

With reference to the second aspect, in some possible implementations, the method further includes: and the network equipment receives second indication information from the terminal equipment, wherein the second indication information is used for indicating the result of the synchronous measurement.

The terminal equipment carries out synchronous measurement, and after the synchronous measurement result is obtained, the synchronous measurement result can be reported to the network equipment, so that the network equipment can adjust the transmitted signals according to the report of the terminal equipment, the transmission synchronization is ensured, and the performance of cooperative transmission is further ensured. It can be understood that reporting the result of the synchronous measurement to the network device may be performed in an explicit or implicit, direct or indirect indication manner.

With reference to the first aspect, in some possible implementations, the method further includes: and the terminal equipment sends Channel State Information (CSI) to the network equipment, and the CSI is obtained according to the result of the synchronous measurement.

With reference to the second aspect, in some possible implementations, the method further includes: and the network equipment receives Channel State Information (CSI) from the terminal equipment, and the CSI is obtained according to the result of the synchronous measurement.

The terminal device performs synchronization measurement, and after a result of the synchronization measurement is obtained, channel estimation can be performed according to the result of the synchronization measurement to obtain CSI to feed back to the network device, and optionally, the CSI includes a precoding matrix indicator PMI and/or a channel quality indicator CQI.

With reference to the first aspect or the second aspect, in some possible implementations, the first reference signal is a reference signal, and the second reference signal is an alignment reference signal; or, the first reference signal is a comparison reference signal, and the second reference signal is a reference signal.

The at least one first reference signal and the at least one second reference signal are associated with the synchronization measurement, and one of the first reference signal and the second reference signal may be used as a reference object and the other may be used as a comparison object to associate the synchronization measurement.

With reference to the first aspect, in some possible implementations, the performing synchronous measurement on the at least one first reference signal and the at least one second reference signal includes: the propagation delay difference and/or the phase change of the at least one comparison reference signal relative to the at least one reference signal is measured.

With reference to the second aspect, in some possible implementations, the first indication information is specifically used to indicate that a transmission delay difference and/or a phase change of the at least one comparison reference signal with respect to the at least one reference signal is measured.

One of the first reference signal and the second reference signal is used as a reference object, and the other one is used as a comparison object to perform correlation synchronization measurement, so that the transmission delay difference and/or the phase change of the at least one comparison reference signal relative to the at least one reference signal can be measured to obtain a synchronization state, and the performance of cooperative transmission is ensured.

With reference to the first aspect or the second aspect, in some possible implementations, the first indication information further includes indication information of a channel large scale parameter.

It is to be understood that the large scale parameter may include at least one of average delay (average delay) and delay spread (delay spread), and the indication information of the channel large scale parameter may indicate that the reference signal resource corresponding to the at least one first reference signal and the reference signal resource corresponding to the at least one second reference signal have a quasi-co-located QCL relationship at least with respect to the average delay and/or the delay spread, that is, an associated synchronization measurement.

In a third aspect, a method of receiving an indication is provided. The method may be executed by the terminal device, or may also be executed by a chip configured in the terminal device, which is not limited in this application.

Specifically, the method comprises the following steps: the terminal equipment receives first indication information from network equipment, wherein the first indication information is used for indicating at least one first reference signal and at least one second reference signal to be associated with synchronous measurement; and the terminal equipment carries out synchronous measurement on the at least one first reference signal and the at least one second reference signal according to the first indication information.

In a fourth aspect, a method of transmitting an indication is provided. The method may be performed by a network device, or may be performed by a chip configured in the network device, which is not limited in this application.

Specifically, the method comprises the following steps: the network equipment generates first indication information, wherein the first indication information is used for indicating at least one first reference signal and at least one second reference signal to be associated with synchronous measurement; and the network equipment sends the first indication information to terminal equipment.

With reference to the third aspect, in some possible implementations, the method further includes: and the terminal equipment sends second indication information to the network equipment, wherein the second indication information is used for indicating the result of the synchronous measurement.

With reference to the fourth aspect, in some possible implementations, the method further includes: and the network equipment receives second indication information from the terminal equipment, wherein the second indication information is used for indicating the result of the synchronous measurement.

With reference to the third aspect, in some possible implementations, the method further includes: and the terminal equipment sends Channel State Information (CSI) to the network equipment, and the CSI is obtained according to the result of the synchronous measurement.

With reference to the fourth aspect, in some possible implementations, the method further includes: and the network equipment receives Channel State Information (CSI) from the terminal equipment, and the CSI is obtained according to the result of the synchronous measurement.

With reference to the third aspect or the fourth aspect, in some possible implementations, the first reference signal is a reference signal, and the second reference signal is an alignment reference signal; or, the first reference signal is a comparison reference signal, and the second reference signal is a reference signal.

With reference to the third aspect, in some possible implementations, the performing synchronous measurement on the at least one first reference signal and the at least one second reference signal includes: determining a propagation delay difference and/or a phase change of the at least one comparison reference signal relative to the at least one reference signal.

With reference to the fourth aspect, in some possible implementations, the first indication information is specifically used to indicate that a transmission delay difference and/or a phase change of the at least one comparison reference signal with respect to the at least one reference signal is measured.

With reference to the third aspect or the fourth aspect, in some possible implementations, the first indication information includes transmission configuration indication status TCI state information, which is used to indicate that a reference signal resource corresponding to the first reference signal and a reference signal resource corresponding to the second reference signal have a quasi-co-located QCL relationship.

To indicate at least one first reference signal and at least one second reference signal associated synchronization measurement, indicating that a reference signal resource corresponding to the at least one first reference signal and a reference signal resource corresponding to the at least one second reference signal have a quasi-co-located QCL relationship therebetween by transmitting configuration indication state TCI state information may indicate to a terminal device that the at least one first reference signal and the at least one second reference signal are associated synchronization measurements.

With reference to the third aspect or the fourth aspect, in some possible implementations, the first indication information further includes indication information of a channel large scale parameter.

In a fifth aspect, a method of receiving an indication is provided. The method may be executed by the terminal device, or may also be executed by a chip configured in the terminal device, which is not limited in this application.

Specifically, the method comprises the following steps: the method comprises the steps that terminal equipment receives first indication information corresponding to a first reference signal resource from network equipment, wherein the first indication information is used for indicating M antenna port groups related to synchronous measurement, and M is a positive integer greater than or equal to 2; and the terminal equipment carries out synchronous measurement on the M antenna port groups according to the first indication information.

Therefore, the terminal device receives the first indication information, performs synchronous measurement on the M antenna port groups according to the indication of the first indication information, and can accurately acquire transmission synchronization states (such as synchronization deviation) corresponding to the M antenna port groups through the synchronous measurement, thereby ensuring the performance of cooperative transmission.

In a sixth aspect, a method of transmitting an indication is provided. The method may be performed by a network device, or may be performed by a chip configured in the network device, which is not limited in this application.

Specifically, the method comprises the following steps: the network equipment generates first indication information corresponding to a first reference signal resource, wherein the first indication information is used for indicating M antenna port groups associated with synchronous measurement, and M is a positive integer greater than or equal to 2; and the network equipment sends the first indication information to terminal equipment.

Therefore, the network device can instruct the terminal device to associate the M antenna port groups for synchronous measurement, so that the terminal device can accurately acquire the transmission synchronization states (such as synchronization deviation) corresponding to the M antenna port groups by measurement, and the performance of cooperative transmission is ensured.

With reference to the fifth aspect, in some possible implementations, the method further includes: and the terminal equipment sends second indication information to the network equipment, wherein the second indication information is used for indicating the result of the synchronous measurement.

With reference to the sixth aspect, in some possible implementations, the method further includes: and the network equipment receives second indication information from the terminal equipment, wherein the second indication information is used for indicating the result of the synchronous measurement.

With reference to the fifth aspect, in some possible implementations, the method further includes: and the terminal equipment sends Channel State Information (CSI) to the network equipment, and the CSI is obtained according to the result of the synchronous measurement.

With reference to the sixth aspect, in some possible implementations, the method further includes: and the network equipment receives Channel State Information (CSI) from the terminal equipment, and the CSI is obtained according to the result of the synchronous measurement.

With reference to the fifth aspect or the sixth aspect, in some possible implementations, the M antenna port groups include at least one reference antenna port group.

The M antenna port groups are associated with the synchronous measurement, and at least one antenna port group may be used as a reference object, and the remaining antenna port groups in the M antenna port groups may be used as comparison objects to associate the synchronous measurement.

With reference to the fifth aspect, in some possible implementations, the performing synchronization measurement on the M antenna port groups includes: and determining to measure the transmission delay difference and/or the phase change of other antenna port groups except the at least one reference antenna port group in the M antenna port groups relative to the at least one reference antenna port group.

With reference to the sixth aspect, in some possible implementations, the first indication information is specifically used to indicate that transmission delay differences and/or phase changes of antenna port groups other than the at least one reference antenna port group in the M antenna port groups with respect to the at least one reference antenna port group are measured.

At least one antenna port group is used as a reference object, the other antenna port groups are used as comparison objects to perform correlation synchronization measurement, and the transmission delay difference and/or phase change of at least one comparison antenna port group relative to at least one reference antenna port group can be measured to obtain a synchronization state, so that the performance of cooperative transmission is ensured.

With reference to the fifth aspect or the sixth aspect, in some possible implementations, the M antenna port groups include N code division multiplexing, CDM, groups, and N is a positive integer.

It can be considered that signals transmitted by antenna ports in the same CDM group can be received simultaneously, and when different CDM groups are associated with synchronization measurement, the transmission synchronization status of different CDM groups needs to be determined.

In a seventh aspect, a method of transmitting an indication is provided. The method may be performed by a network device, or may be performed by a chip configured in the network device, which is not limited in this application.

Specifically, the method comprises the following steps: the method comprises the steps that a first network device receives a synchronous measurement result reported by a terminal device; the first network equipment sends the result of the synchronous measurement and/or the adjustment quantity information to the at least one second network equipment; the adjustment amount information is information generated by the first network device according to the result of the synchronization measurement and used for instructing the at least one second network device to adjust the transmission parameter.

Therefore, when the second network device is not synchronized with the first network device, the first network device can send the result of the synchronization measurement and/or the adjustment quantity information to the at least one second network device, and the performance of cooperative transmission is ensured.

With reference to the seventh aspect, in some possible implementations, the method further includes: and the first network equipment adjusts transmission parameters according to the synchronous measurement result.

With reference to the seventh aspect, in some possible implementations, the method further includes: and the first network equipment adjusts transmission parameters according to the synchronous measurement result based on an adjustment rule.

When the first network device is required to adjust the transmission parameter, the first network device may adjust the transmission parameter to ensure the performance of cooperative transmission.

In an eighth aspect, the present application provides a method of receiving an indication. The method may be performed by a network device, or may be performed by a chip configured in the network device, which is not limited in this application.

Specifically, the method comprises the following steps: receiving, by a second network device, a synchronization measurement result and/or adjustment amount information sent by a first network device, where the adjustment amount information is information generated by the first network device according to the synchronization measurement result and used for instructing the second network device to adjust a transmission parameter; and the second network equipment adjusts transmission parameters according to the synchronous measurement result and/or the regulating quantity information.

Therefore, when the second network device is not synchronized with the first network device, the second network device can obtain the result of the synchronization measurement and/or the adjustment quantity information from the first network device, and the performance of the cooperative transmission is ensured.

With reference to the eighth aspect, in some possible implementations, the method further includes: and the first network equipment adjusts transmission parameters according to the synchronous measurement result.

With reference to the eighth aspect, in some possible implementations, the method further includes: and the second network equipment adjusts the transmission parameters according to the synchronous measurement result based on an adjustment rule.

When the second network device is required to adjust the transmission parameter, the second network device may adjust the transmission parameter to ensure the performance of cooperative transmission.

In a ninth aspect, a communication device is provided, which comprises various modules or units, such as a processing unit and/or a transceiver unit, for performing the method in any one of the possible implementations of the first aspect.

In a tenth aspect, a communication device is provided that includes a processor. The processor is coupled to the memory and is operable to execute instructions in the memory to implement the method of any one of the possible implementations of the first aspect. Optionally, the communication device further comprises a memory. Optionally, the communication device further comprises a communication interface, the processor being coupled to the communication interface.

In one implementation, the communication device is a terminal device. When the communication device is a terminal device, the communication interface may be a transceiver, or an input/output interface.

In another implementation, the communication device is a chip configured in the terminal equipment. When the communication device is a chip configured in a terminal device, the communication interface may be an input/output interface.

Alternatively, the transceiver may be a transmit-receive circuit. Alternatively, the input/output interface may be an input/output circuit.

In an eleventh aspect, a communication device is provided, which comprises various modules or units, such as a processing unit and/or a transceiver unit, for performing the method in any one of the possible implementations of the second aspect.

In a twelfth aspect, a communications apparatus is provided that includes a processor. The processor is coupled to the memory and is operable to execute the instructions in the memory to implement the method of any one of the possible implementations of the second aspect. Optionally, the communication device further comprises a memory. Optionally, the communication device further comprises a communication interface, the processor being coupled to the communication interface.

In one implementation, the communication device is a network device. When the communication device is a network device, the communication interface may be a transceiver, or an input/output interface.

In another implementation, the communication device is a chip configured in the network device. When the communication device is a chip configured in a network device, the communication interface may be an input/output interface.

In a thirteenth aspect, a communication device is provided, which comprises various means or units, such as a processing unit and/or a transceiver unit, for performing the method in any one of the possible implementations of the third aspect.

In a fourteenth aspect, a communications apparatus is provided that includes a processor. The processor is coupled to the memory and is operable to execute the instructions in the memory to implement the method of any one of the possible implementations of the third aspect. Optionally, the communication device further comprises a memory. Optionally, the communication device further comprises a communication interface, the processor being coupled to the communication interface.

In a fifteenth aspect, a communication device is provided, which comprises various means or units, such as a processing unit and/or a transceiver unit, for performing the method in any one of the possible implementations of the fourth aspect.

In a sixteenth aspect, a communications apparatus is provided that includes a processor. The processor is coupled to the memory and is operable to execute the instructions in the memory to implement the method of any one of the possible implementations of the fourth aspect. Optionally, the communication device further comprises a memory. Optionally, the communication device further comprises a communication interface, the processor being coupled to the communication interface.

A seventeenth aspect provides a communication device comprising various means or units, such as a processing unit and/or a transceiver unit, for performing the method of any one of the possible implementations of the fifth aspect.

In an eighteenth aspect, a communications apparatus is provided that includes a processor. The processor is coupled to the memory and is operable to execute the instructions in the memory to implement the method of any one of the possible implementations of the fifth aspect. Optionally, the communication device further comprises a memory. Optionally, the communication device further comprises a communication interface, the processor being coupled to the communication interface.

In a nineteenth aspect, a communication device is provided, which comprises various means or units, such as a processing unit and/or a transceiver unit, for performing the method in any one of the possible implementations of the sixth aspect.

In a twentieth aspect, a communication apparatus is provided that includes a processor. The processor is coupled to the memory and is operable to execute the instructions in the memory to implement the method of any one of the possible implementations of the sixth aspect. Optionally, the communication device further comprises a memory. Optionally, the communication device further comprises a communication interface, the processor being coupled to the communication interface.

In a twenty-first aspect, a communication device is provided, which includes various modules or units, such as a processing unit and/or a transceiver unit, for performing the method in any one of the possible implementations of the seventh aspect.

In a twenty-second aspect, a communications apparatus is provided that includes a processor. The processor is coupled to the memory and is operable to execute the instructions in the memory to implement the method of any one of the possible implementations of the seventh aspect. Optionally, the communication device further comprises a memory. Optionally, the communication device further comprises a communication interface, the processor being coupled to the communication interface.

A twenty-third aspect provides a communication device comprising respective means or units, such as a processing unit and/or a transceiver unit, for performing the method of any one of the possible implementations of the eighth aspect.

In a twenty-fourth aspect, a communications apparatus is provided that includes a processor. The processor is coupled to the memory and is operable to execute the instructions in the memory to implement the method of any one of the possible implementations of the eighth aspect. Optionally, the communication device further comprises a memory. Optionally, the communication device further comprises a communication interface, the processor being coupled to the communication interface.

In a twenty-fifth aspect, a processor is provided, comprising: input circuit, output circuit and processing circuit. The processing circuit is configured to receive a signal via the input circuit and transmit a signal via the output circuit, such that the processor performs the method of any one of the possible implementations of the first, second, third, fourth, fifth, sixth, seventh or eighth aspect, and the first, second, third, fourth, fifth, sixth, seventh or eighth aspect.

In a specific implementation process, the processor may be a chip, the input circuit may be an input pin, the output circuit may be an output pin, and the processing circuit may be a transistor, a gate circuit, a flip-flop, various logic circuits, and the like. The input signal received by the input circuit may be received and input by, for example and without limitation, a receiver, the signal output by the output circuit may be output to and transmitted by a transmitter, for example and without limitation, and the input circuit and the output circuit may be the same circuit that functions as the input circuit and the output circuit, respectively, at different times. The embodiment of the present application does not limit the specific implementation manner of the processor and various circuits.

In a twenty-sixth aspect, a processing apparatus is provided that includes a processor and a memory. The processor is configured to read instructions stored in the memory and may receive a signal via the receiver and transmit a signal via the transmitter to perform the method of any one of the possible implementations of the first, second, third, fourth, fifth, sixth, seventh or eighth aspect and the first, second, third, fourth, fifth, sixth, seventh or eighth aspect.

Optionally, the number of the processors is one or more, and the number of the memories is one or more.

Alternatively, the memory may be integral to the processor or provided separately from the processor.

In a specific implementation process, the memory may be a non-transient memory, such as a Read Only Memory (ROM), which may be integrated on the same chip as the processor, or may be separately disposed on different chips.

It will be appreciated that the associated data interaction process, for example, sending the indication information, may be a process of outputting the indication information from the processor, and receiving the indication information may be a process of receiving the input indication information from the processor. In particular, data output by the processor may be output to a transmitter and input data received by the processor may be from a receiver. The transmitter and receiver may be collectively referred to as a transceiver, among others.

The processing device in the twenty-sixth aspect may be a chip, and the processor may be implemented by hardware or software, and when implemented by hardware, the processor may be a logic circuit, an integrated circuit, or the like; when implemented in software, the processor may be a general-purpose processor implemented by reading software code stored in a memory, which may be integrated with the processor, located external to the processor, or stand-alone.

In a twenty-seventh aspect, there is provided a computer program product comprising: a computer program (which may also be referred to as code, or instructions), which when executed, causes a computer to perform the method of any one of the possible implementations of the first, second, third, fourth, fifth, sixth, seventh or eighth aspect described above, as well as the first, second, third, fourth, fifth, sixth, seventh or eighth aspect.

A twenty-eighth aspect provides a computer-readable medium storing a computer program (which may also be referred to as code, or instructions) which, when run on a computer, causes the computer to perform the method of any of the above-described first, second, third, fourth, fifth, sixth, seventh, or eighth aspects, and possible implementations of any of the first, second, third, fourth, fifth, sixth, seventh, or eighth aspects.

A twenty-ninth aspect provides a communication system, including the foregoing network device and terminal device

In a thirtieth aspect, a communication system is provided, comprising the aforementioned first network device and at least one of the aforementioned second network devices.

Drawings

FIG. 1 is a schematic diagram of a communication system suitable for use with the method of sending and receiving indications of an embodiment of the present application;

FIG. 2 is a schematic flow chart diagram of a method for sending and receiving an indication provided by an embodiment of the present application;

FIG. 3 is a schematic flow chart diagram of another method for sending and receiving an indication provided by an embodiment of the present application;

FIG. 4 is a schematic flow chart diagram of yet another method for sending and receiving an indication provided by an embodiment of the present application;

FIG. 5 is a schematic flow chart diagram of yet another method for sending and receiving an indication provided by an embodiment of the present application;

fig. 6 is a schematic block diagram of a communication device provided by an embodiment of the present application;

fig. 7 is a schematic structural diagram of a terminal device provided in an embodiment of the present application;

fig. 8 is a schematic structural diagram of a network device according to an embodiment of the present application.

Detailed Description

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

The technical scheme of the embodiment of the application can be applied to various communication systems, for example: LTE Time Division Duplex (TDD), Universal Mobile Telecommunications System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) communication system, fifth generation (5th generation, 5G) system, New Radio (NR), and the like.

It should be understood that the network device in the communication system may be any device with wireless transceiving function or a chip disposed on the device, and the device includes but is not limited to: evolved Node B (eNB), Node B (NB), Base Station Controller (BSC), Base Transceiver Station (BTS), Home Base Station (e.g., Home evolved Node B, or Home Node B, HNB), BaseBand Unit (BBU), Access Point (AP) in Wireless Fidelity (WIFI) system, Wireless relay Node, Wireless backhaul Node, Transmission Point (TP), or Transmission Reception Point (TRP), etc., and may also be 5G, such as NR, gNB in the system, or, a transmission point (TRP or TP), one or a group (including multiple antenna panels) of antenna panels of a base station in a 5G system, alternatively, it may also be a network node forming a gNB or a transmission point, such as a baseband unit (BBU), or a Distributed Unit (DU).

In some deployments, the gNB may include a Centralized Unit (CU) and a DU. The gNB may also include a Radio Unit (RU). The CU implements part of the function of the gNB, and the DU implements part of the function of the gNB, for example, the CU implements Radio Resource Control (RRC) and Packet Data Convergence Protocol (PDCP) layers, and the DU implements Radio Link Control (RLC), Medium Access Control (MAC) and Physical (PHY) layers. Since the information of the RRC layer eventually becomes or is converted from the information of the PHY layer, the higher layer signaling, such as RRC layer signaling or PHCP layer signaling, may also be considered to be transmitted by the DU or by the DU + RU under this architecture. It is to be understood that the network device may be a CU node, or a DU node, or a device including a CU node and a DU node. In addition, the CU may be divided into network devices in the access network RAN, or may be divided into network devices in the core network CN, which is not limited herein.

It should also be understood that terminal equipment in the communication system may also be referred to as User Equipment (UE), access terminal, subscriber unit, subscriber station, mobile station, remote terminal, mobile device, user terminal, wireless communication device, user agent, or user device. The terminal device in the embodiment of the present application may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with a wireless transceiving function, a Virtual Reality (VR) terminal device, an Augmented Reality (AR) terminal device, a wireless terminal in industrial control (industrial control), a wireless terminal in self driving (self driving), a wireless terminal in remote medical treatment (remote medical), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety (transportation safety), a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), and the like. The embodiments of the present application do not limit the application scenarios.

To facilitate understanding of the embodiments of the present application, a brief description of several terms referred to in the present application will be given first.

1. Synchronous measurement: measurements made on a plurality of signals transmitted simultaneously. Here, the term "synchronous transmission" is described from the perspective of the receiving end, which means that a plurality of signals arrive at the receiving end synchronously, that is, the receiving end should theoretically be able to receive the signals of the synchronous transmission at the same time (within the same time).

The synchronization measurement includes measuring arrival times of a plurality of signals associated with the synchronization measurement, determining deviations between the arrival times, e.g., measuring arrival times of a reference signal, and measuring deviations of the arrival times of the comparison reference signal from the reference signal; or determining how long time has elapsed for the start time compared to the reception of the reference signal, using the arrival time of the reference signal as the start time. Alternatively, phase variation between signals measured by multiple associated synchronizations is measured, and the phase variation may be obtained based on a difference between phase information of the signals, where the phase information may refer to a difference between the signals or the measured channels in one or more frequency domain units; the phase information of the signal at least comprises slope information of the phase, and the slope information refers to the slope information of the signal which changes by taking the waveform of the subcarrier as the change. The deviations, differences, etc. may be embodied in the form of differences, ratios, etc. The frequency domain units may be subcarriers, Resource Blocks (RBs), subbands (subbands), and the like.

The synchronization measurement may also be referred to as a time delay measurement, a phase slope measurement, or a phase change measurement, etc.

It should be noted that the above-mentioned signals related to synchronization measurement (i.e. synchronization signals transmitted by synchronization transmission) are not necessarily received by the receiving end at the same time actually, and synchronization measurement is a measurement performed to ensure the assumed synchronization transmission, so as to determine whether the signal transmission is truly synchronized. The above-described deviation of the measurement arrival time and the difference in the phase information between the signals are only exemplary means for synchronous measurement, and do not constitute any particular limitation to the embodiments of the present application.

The concept of simultaneous includes within the same period of time, or at the same sampling point set, or at the same symbol (symbol), or at the same symbol set (e.g., the same slot, the same frame, etc.), etc.

It is understood that the object targeted by the synchronization measurement may be a specific transmission object, i.e. a reference signal, or may be characterized by an antenna port for transmitting a signal.

2. Reference signal and reference signal resource: the reference signal may be used for channel measurement, channel estimation, beam quality monitoring, or the like. Reference may be specifically made to the prior art for configuration information of reference signal resources related to reference signals, such as time-frequency resource positions, port mapping relationships, power factors, precoding information, delay information, phase offset information, scrambling codes, and the like. The transmitting end device may transmit the reference signal based on the configuration information of the reference signal resource, and the receiving end device may receive the reference signal based on the configuration information of the reference signal resource. The reference signal resources may be labeled with a reference signal resource identification.

Specifically, the reference signal according to the embodiment of the present application may include, for example, a channel state information reference signal (CSI-RS), a Synchronization Signal Block (SSB), a demodulation reference signal (DMRS), a Phase tracking signal (PTRS), and a Sounding Reference Signal (SRS). Correspondingly, the reference signal resource may include a CSI-RS resource (CSI-RS resource), an SSB resource, an SRS resource (SRS resource), a PTRS resource, and the like.

The SSB may also be referred to as a synchronization signal/physical broadcast channel block (SS/PBCH block), and the corresponding SSB resource may also be referred to as a synchronization signal/physical broadcast channel block resource (SS/PBCH block resource), which may be referred to as SSB resource for short. In some cases, SSB may also refer to SSB resources. In the embodiments of the present application, for convenience of differentiation and illustration, the SSB may be regarded as an SS/PBCH block and the SSB resource may be regarded as an SS/PBCH block resource without specific description.

To distinguish between different reference signal resources, each reference signal resource may correspond to an identification of one reference signal resource, e.g., a CSI-RS resource identification (CRI), an SSB resource identification (SSBRI), an SRS Resource Index (SRI), a resource identification of a preamble sequence transmitted on a Physical Random Access Channel (PRACH).

The SSB resource identifier may also be referred to as an SSB identifier (e.g., SSB index).

It should be understood that the above listed reference signals and corresponding reference signal resources are only exemplary and should not constitute any limitation to the present application, which does not exclude the possibility of defining other reference signals in future protocols to achieve the same or similar functions.

In one possible design, a network device may send CSI Resource configurations (CSI Resource settings) to a terminal device via a Radio Resource Control (RRC) message, where each CSI Resource setting may include S (S ≧ 1 and S is an integer) CSI-RS Resource sets (CSI-RS Resource sets), and each CSI-RS Resource set may include K (K ≧ 1 and K is an integer) Non-Zero Power (Non-Zero Power, NZP) CSI-RS resources (NZP CSI-RS resources). The terminal equipment can receive the CSI-RS according to the K NZP CSI-RS resources indicated by the network equipment.

In another possible design, when the terminal device accesses the cell, the resource configuration information of the SSB may be known. The network device may also indicate the identity of one or more SSB resources, such as a Set of channel state information synchronization signal block resources (CSI-SSB-Resource Set), via a special Set of CSI-RS resources.

It should be understood that the above-listed specific method for indicating the reference signal resource to the terminal device by the network device is only an example, and should not constitute any limitation to the present application, and the present application does not exclude the possibility of using other signaling or manners to indicate the reference signal resource in future protocols. For example, the network device may further indicate J (K ≧ J ≧ 1, and J is an integer) number of NZP CSI-RS resources used among the K number of NZP CSI-RS resources through Downlink Control Information (DCI).

3. Antenna port (antenna port): referred to as a port for short. A transmit antenna identified by the receiving end device, or a spatially distinguishable transmit antenna. The antenna port is a logical meaning, one antenna port may be configured for each virtual antenna, each virtual antenna may be a weighted combination of a plurality of physical antennas, and each antenna port may correspond to one reference signal port. The antenna port is used for carrying at least one of a specific physical channel and a physical signal. Signals transmitted through the same antenna port, whether transmitted through the same or different physical antennas, may be considered the same or correlated (e.g., large-scale channel characteristics, such as channel matrix H, are the same) for the channels corresponding to the paths they travel through in space. That is, the receiving end may consider the same or correlated channels of the signals transmitted through the same antenna port when demodulating the signals. That is, the antenna ports define a channel on a certain symbol, and the antenna ports of two symbols are the same, that is, a channel on one symbol can be inferred by a channel on the other symbol.

4. Quasi-co-location (QCL): QCL relationships are used to indicate that multiple resources have one or more identical or similar communication characteristics. For example, if two antenna ports have a quasi co-location relationship, the large scale characteristics of the channel carrying a signal on one port can be inferred from the large scale characteristics of the channel carrying a signal on the other port. The signals corresponding to the antenna ports having the QCL relationship have the same parameters, or the parameters of one antenna port may be used to determine the parameters of another antenna port having the QCL relationship with the antenna port, or two antenna ports have the same parameters, or the parameter difference between the two antenna ports is smaller than a certain threshold. Wherein the parameters may include one or more of the following channel large-scale parameters: delay spread (delay spread), Doppler spread (Doppler spread), Doppler shift (Doppler shift), average delay (average delay), average gain, or spatial Rx parameters, etc. The spatial receiving parameter may include one or more of an Angle of emission (AOD), a main Angle of emission (Dominant AOD), an Average Angle of arrival (Average AoA), an Angle of arrival (Angle of arrival, AoA), a channel correlation matrix, a power Angle spread spectrum of the Angle of arrival, an Average Angle of emission (Average AOD), a power Angle spread spectrum of the Angle of departure, a transmit channel correlation, a receive channel correlation, a transmit beamforming, a receive beamforming, a spatial channel correlation, a spatial filter, a spatial filtering parameter, or a spatial receiving parameter.

In the existing NR protocol, the above QCL relationship can be classified into the following four types based on different parameters:

type a (type a): doppler frequency shift, Doppler spread, average time delay and time delay spread;

type b (type b): doppler shift, doppler spread;

type c (type c): doppler shift, average delay; and

type d (type d): the space receives the parameters.

The QCL relationship related to the association synchronization measurement in the embodiment of the present application may be a reuse of an existing type, or may be newly added with a new type definition, for example, a QCL of type E, that is, a QCL defined with respect to at least one of an average delay (average delay) and a delay spread (delay spread). This example is merely exemplary and is not to be construed as limiting the present application.

When QCL relationship refers to a QCL relationship of type corresponding to associated synchronization measurements (assuming type E): the QCL relationship between the first signal and the second signal, or between the first antenna port and the second antenna port, may refer to that two signals (or two antenna ports) are assumed to have the same or similar average delay and/or delay spread, that is, at least one of the average delay and/or delay spread of one of the signals (signal/antenna port) may be used to infer at least one of the average delay and/or delay spread of the other signal (signal/antenna port), that is, the QCL relationship is used to indicate that two signals (or two antenna ports) are transmitted synchronously.

5. Transmission Configuration Indicator (TCI): may be used to indicate the QCL relationship between the two reference signals. The network device may configure at least one TCI state (TCI state) for the terminal device through higher layer signaling (e.g., Radio Resource Control (RRC) messages), and may activate or indicate one or more TCI states therein through at least one of higher layer signaling (e.g., medium access control-control element, MAC CE) or physical layer signaling (e.g., downlink control information, DCI). Specifically, the network device may configure a TCI state list for the terminal device through an RRC message, and when the terminal device receives a Physical Downlink Control Channel (PDCCH) from the network device, the terminal device may activate one or more of the TCI states of the control channel according to at least one indication of the MAC CE, where the TCI state of the control channel is a subset of at least one TCI state configured by the RRC; the terminal device may obtain DCI from the PDCCH, select one or more TCI states of at least one data channel TCI state according to an indication of the DCI, where the at least one data channel TCI state is a subset of at least one TCI state configured by the RRC, and indicate the subset to the terminal device through MAC-CE signaling. It should be noted that the concept of subsets in this application also includes full and empty sets.

The configuration information for one TCI state may include an identification of one or more reference signal resources and the associated at least one QCL type. When the QCL relationship is configured to be one of type a, B, or C, the terminal device may demodulate a Physical Downlink Control Channel (PDCCH) or a Physical Downlink Shared Channel (PDSCH) according to the indication of the TCI state.

The TCI status may also be used to indicate receipt of CSI-RS resources. If a TCI state is configured for a certain CSI-RS resource (group), the UE receives the CSI-RS according to the reference signal resource in the TCI state and the associated QCL type.

When the QCL relationship is configured to correspond to the type of the associated synchronization measurement (assuming type E), the terminal device may know which downlink signals or antenna ports are assumed to be synchronously transmitted for performing the synchronization measurement.

6. Wave beam: the representation of the beams in the NR protocol may be spatial filters, or so-called spatial filters or spatial parameters. A beam for transmitting a signal may be referred to as a transmission beam (Tx beam), a spatial domain transmit filter (spatial domain transmit filter), or a spatial transmit parameter (spatial domain transmit parameter); the beam for receiving the signal may be referred to as a reception beam (Rx beam), a spatial domain receive filter (spatial domain receive filter), or a spatial domain receive parameter (spatial domain receive parameter).

The transmission beam may refer to the distribution of signal strength formed in different spatial directions after the signal is transmitted through the antenna, and the reception beam may refer to the distribution of signal strength of the wireless signal received from the antenna in different spatial directions.

7. Channel State Information (CSI): may include at least one of the following information: channel Quality Indicator (CQI), Precoding Matrix Indicator (PMI), CSI-RS resource indicator (CSI-RS resource indicator), Synchronization Signal Block (SSB) resource indicator (SSBRI), Layer Indicator (LI), Rank Indicator (RI), Reference Signal Received Power (RSRP). The RSRP may be the RSRP of layer 1 (L1-RSRP). In this application, the channel state information may further include a synchronization measurement result or indication information of the synchronization measurement result.

In addition, in order to facilitate understanding of the embodiments of the present application, the following description is made.

First, the first, second and various numerical numbers in the embodiments shown below are merely for convenience of description and are not intended to limit the scope of the embodiments of the present application. For example, the first and second may be distinguished as types in the embodiment of the present application, and not as object contents: the first reference signal and the second reference signal are related to synchronous measurement, one is a reference signal, and the other is a comparison signal, but the "at least one first reference signal" is not limited to be sent by the same TRP or the same antenna port, and is not limited to have the same transmission content.

Second, the term "store" referred to in the embodiments of the present application may refer to storing in one or more memories. The one or more memories may be provided separately or integrated in the encoder or decoder, the processor, or the communication device. The one or more memories may also be provided separately, with a portion of the one or more memories being integrated into the decoder, the processor, or the communication device. The type of memory may be any form of storage medium and is not intended to be limiting of the present application.

Third, the "protocol" referred to in the embodiments of the present application may refer to a standard protocol in the communication field, and may include, for example, an LTE protocol, an NR protocol, a WLAN protocol, and other related protocols in the communication system, which is not limited in the present application.

Fourth, "at least one" means one or more, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone, wherein A and B can be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items. For example, at least one (one) of a, b, and c, may represent: a, or, b, or, c, or, a and b, or, a and c, or, b and c, or, a, b and c. Wherein a, b and c may be single or plural respectively.

Fifth, in the embodiment of the present application, "the reference signal," "the reference antenna port group," "the reference point," and "the anchor point reference signal" are all bases for describing a reference comparison of an object as another object, and "the comparison reference signal" and "the comparison antenna port group" all describe deviations of the object with respect to the reference object for comparison and comparison.

For the convenience of understanding the embodiments of the present application, a communication system suitable for the method for sending and receiving an indication provided by the embodiments of the present application will be described in detail below by taking the communication system shown in fig. 1 as an example. As shown in fig. 1, the communication system 100 may include at least one terminal device 101; the communication system 100 may also include at least one network device, such as network device #1102 or network device # 2103 shown in fig. 1.

Optionally, the network device #1102 and the network device # 2103 may be network devices in the same cell, or may be network devices in different cells, which is not limited in this application. Fig. 1 shows an example in which network device #1102 and network device # 2103 are located in the same cell, for example only.

In communication system 100, network device #1102 and network device # 2103 may communicate with each other via a backhaul link, which may be a wired backhaul link (e.g., fiber, copper cable) or a wireless backhaul link (e.g., microwave). Network device #1102 and network device # 2103 may cooperate with each other to provide services to terminal device 101. Thus, the terminal apparatus 101 can communicate with the network apparatus #1102 and the network apparatus # 2103, respectively, through wireless links.

In addition, one or more of network device #1102 and network device # 2103 may also schedule PDSCH for terminal device 101 on one or more Carrier Components (CCs) using carrier aggregation techniques, respectively. For example, network device #1102 may schedule PDSCH for terminal device 101 on CC #1 and CC #2, and network device # 2103 may schedule PDSCH for terminal device 101 on CC #1 and CC # 3. The CCs scheduled by network device #1102 and network device # 2103 may be the same or different, and the present application does not limit this.

Communication delays between cooperating network devices can be divided into ideal backhaul (idealol backhaul) and non-ideal backhaul (non-idealol backhaul). Communication delay between two sites under ideal backhaul can be microsecond level, and can be ignored compared with millisecond level scheduling in NR; communication delay between two stations under non-ideal backhaul can be on the millisecond level, and cannot be ignored compared with the millisecond level scheduling in NR.

In order to ensure the performance of cooperative transmission, the synchronization precision between network devices is required. However, the precise synchronization requirement of the network device is too high in cost, so that synchronization outside the precise requirement range and randomness of positions from the terminal device to the network device can only be achieved, and when a plurality of network devices perform cooperative transmission for one terminal, propagation delays from signals of the plurality of network devices to the terminal device may be different. Therefore, in the actual transmission process, the synchronization between the network devices is actually implemented with a great complexity, and the synchronization state may affect the performance of the channel estimation and the cooperative transmission. Such as cooperative transmission, the system may introduce additional interference if the signals received by the terminal from multiple network devices are not aligned in the time domain.

By way of example, network device #1102 and network device # 2103 of fig. 1 provide coordinated transmissions for terminal device 101 based on the location and negotiation of the deployment. In actual transmission, due to movement of the terminal device 101, blocking of an obstacle in a propagation path, and the like, there may be a deviation between an actual transmission delay and a theoretical transmission delay from the network device to the terminal device, and a synchronization deviation may actually occur in theoretical synchronization. In fig. 1, the actual transmission delay from network device #1102 to terminal device 101 is t1, the actual transmission delay from network device # 2103 to terminal device 101 is t2, and terminal device 101 assumes that network device #1102 and network device # 2103 are synchronously transmitting, that is, that the time of arrival at terminal device 101 of the signals transmitted by network device #1102 and network device # 2103 is the same or meets the set time difference. In fact, t1 and t2 do not satisfy the assumed requirements, the channel estimation performed by the terminal device 101 is biased, and the performance of cooperative transmission is not guaranteed.

In view of the above, the present application provides a method for sending and receiving indication to ensure performance of cooperative transmission.

The following describes in detail a method for transmitting and receiving data according to an embodiment of the present application with reference to the drawings.

Fig. 2 is a schematic flow chart diagram of a method 200 of sending and receiving indications provided by an embodiment of the application, shown from the perspective of device interaction. It should be noted that the present embodiment and the following embodiments are described by taking an example of interaction between a terminal device and a network device. For the convenience of understanding of the solution, in the description, the present embodiment and the following embodiments are developed by using the behavior of multiple sides of the terminal device and the network device, and the overall description is performed from the perspective of multiple interaction parties.

It should be noted that the method for sending and receiving indication provided in the present application can be applied to a wireless communication system, for example, the communication system 100 shown in fig. 1. Communication devices in a communication system may have wireless communication connections between them. For example, the terminal apparatus 101 shown in fig. 1 may have a wireless communication connection relationship with the network apparatus #1102 and the network apparatus # 2103, respectively. The network device #1102 and the network device # 2103 may be an ideal backhaul link or a non-ideal backhaul link, which is not limited in this application. Fig. 1 is merely an example of a network system architecture to which the present application relates, and the present application is not limited thereto. It should be understood that the cooperative transmission scenario applicable to the embodiment of the present application shown in fig. 1 may be a cooperative transmission scenario of a homogeneous network, or may also be a cooperative transmission scenario of a heterogeneous network, which is not limited in the embodiment of the present application. It should also be understood that the scene shown in fig. 1 may be a low-frequency (e.g., the center frequency is below 6 ghz) scene, or may be a high-frequency (e.g., the center frequency is above 6 ghz) scene, which is not limited in this application.

As shown in fig. 2, the method 200 of the embodiment of the present application may include steps 210 to 230. The steps in method 200 are described in detail below:

in step 210, the network device generates first indication information indicating that at least one first reference signal and at least one second reference signal are associated with a synchronization measurement.

Reference signal related synchronization measurement means that the reference signals that the network device desires to configure are synchronized, or that the transmissions of its corresponding network device, antenna port or multiple panels of the same network device are synchronized, i.e. coordinated transmissions. The first reference signal and the second reference signal are not limited to being from different network devices, which may be from different antenna ports, or different antenna panels of the same network device. The indication of the reference signal may be performed through the identifier of the reference signal resource, that is, the network device configures communication resources such as time-frequency resources of each reference signal, the terminal device may receive the corresponding reference signal on the resources configured by the network device, and the corresponding reference signal may be identified through the identifier of the reference signal resource.

When the at least one first reference signal and the at least one second reference signal are related to the synchronization measurement, one of the first reference signal and the second reference signal may be used as a reference object, and the other may be used as a comparison object, so as to relate the synchronization measurement. Optionally, the first reference signal may be used as a reference signal (also referred to as an anchor reference signal), and the second reference signal is a comparison reference signal; or, the first reference signal is a comparison reference signal, and the second reference signal is a reference signal. The reference signal is a reference signal serving as a reference point, and the comparison reference signal is a reference signal which is calculated by taking the reference signal as the reference point and performing deviation calculation compared with the reference signal.

When at least one reference signal is included, the terminal device may be referred to for measurement based on the plurality of reference signals. For example, the terminal devices jointly obtain the final reference value. Taking time domain measurement as an example, for example, the terminal device measures an average arrival time (also referred to as timing or average time delay) from a plurality of reference signals, and this average arrival time is used as a final reference value. The average arrival time is only an example, and the specific implementation may be to take an average value, or to remove a middle value after the maximum value and the minimum value, or to take an average according to the arrival times of a plurality of reference signals on a stronger path (a transmission path with higher signal received power), and the like, which is not limited in this application. The average here may be an arithmetic average, a geometric average, a weighted average, or the like. Alternatively, one or more alignment reference signals may be measured separately from a plurality of reference signals.

In step 220, the network device sends the first indication information, and the terminal device receives the first indication information.

The first indication information may be carried by at least one of RRC, MAC CE, and DCI.

If a plurality of network devices in the network system perform cooperative transmission, the first indication information may be sent by a primary network device, or the first indication information may be sent by an enumerated secondary network device, which is not limited in this application. The main network device may refer to a network device to which the UE accesses, or a network device to which the UE performs RRC connection, or may be a network device set by other rules, which is not limited in this application.

In some possible implementations, the at least one first reference signal and the at least one second reference signal associated synchronization measurement are indicated by indicating a reference signal resource corresponding to the at least one first reference signal and a reference signal resource corresponding to the at least one second reference signal associated synchronization measurement. The indication may be made by any one or more of the following means: and indicating by using a newly added signaling or instructing by using a newly added field in the existing signaling or multiplexing the existing signaling or indicating by multiplexing the existing field in the existing signaling.

In some possible implementations, the first indication information includes TCI state information indicating that reference signal resources corresponding to the at least one first reference signal and reference signal resources corresponding to the at least one second reference signal have a quasi-co-located QCL relationship. Having a QCL relationship between the multiple reference signal resources may refer to having a QCL relationship between antenna ports within each reference resource and antenna ports within other reference signal resources. When at least one first reference signal and at least one second reference signal are to be indicated to be associated with synchronous measurement, indicating that a resource corresponding to the at least one first reference signal and a resource corresponding to the at least one second reference signal have a QCL relationship by transmitting configuration indication status TCI state information to indicate that the terminal device associates synchronous measurement with the at least one first reference signal and the at least one second reference signal. The description of QCL relationships is generally introduced above and will not be described further herein.

Optionally, taking the first reference signal as a reference signal, taking the second reference signal as a comparison reference signal as an example, a configuration example is given below, and in general, the TCI #1 is configured as configuration information of the second reference signal, that is, the network device configures a first TCI state (TCI #1) for the second reference signal, where the first TCI state includes a first reference signal indication, and the first TCI state may further include a quasi-co-located QCL type associated with the first reference signal. It should be noted, however, that the present application is not so limited:

specifically, taking CSI-RS as an example, the network device may use CSI-RS resource #1 (i.e. corresponding to the first reference signal) as a reference for synchronization measurement, and configure this information as TCI to notify the terminal device:

TCI#1

CSI-RS resource#1

after receiving the configuration information, the corresponding relationship maintained by the terminal device side is:

TCI#1

CSI-RS resource#1

thereafter, the network device may configure CSI-RS resource #2 (i.e., corresponding to the second reference signal).

CSI-RS resource#2

TCI#1

Receiving the configuration information, the corresponding relationship of the associated synchronization measurement maintained by the terminal equipment side is as follows:

CSI-RS resource#2

CSI-RS resource#1

the currently configured CSI-RS resource #2 may be referred to as a target reference signal resource, and the previously configured CSI-RS resource #1 as a reference may be referred to as a source reference signal resource. It can be seen that, with the above TCI state configuration, the network device can instruct the terminal devices CSI-RS resource #2 and CSI-RS resource #1 to associate synchronous measurement, that is, the second reference signal and the first reference signal associate synchronous measurement, and the terminal device measures the synchronization deviation of the second reference signal relative to the first reference signal with reference to the first reference signal.

Optionally, the first indication information may indicate quasi-co-located QCL information of one or more second reference signals. For example, the network device configures a second TCI state for a plurality of second reference signals (which may be considered as a second reference signal set, although the concept of the second reference signal set may also include only one second reference signal in the set), where the second TCI state includes the indication of the first reference signal, and the second TCI state may also include the quasi-co-located type associated with the first reference signal. This means that the plurality of second reference signals (or second set of reference signals) all have a QCL relationship with the first reference signal in the second TCI state with respect to the channel large-scale parameter in the associated quasi-co-located QCL type.

It should be understood that, for the above example, the first reference signal may also be a comparison reference signal, the second reference signal is a reference signal, that is, a reference signal corresponding to a currently configured target reference signal resource (CSI-RS resource #2) is a reference signal, and a reference signal corresponding to a previously configured source reference signal resource (CSI-RS resource #1) is a comparison reference signal. And the terminal equipment measures the synchronous deviation of the first reference signal relative to the second reference signal by taking the second reference signal as a reference.

Optionally, when the QCL relationship is configured through the TCI state, if necessary, the indication information of the large scale parameter of the channel associated with the QCL relationship may be further specifically indicated to indicate the type of the QCL relationship, and the existing type may be reused, or a new type definition may be added. The large scale parameter may include at least one of an average delay (average delay), and a delay spread (delay spread), and the indicating information of the channel large scale parameter may indicate that the reference signal resource corresponding to the at least one first reference signal and the reference signal resource corresponding to the at least one second reference signal have a quasi-co-located QCL relationship therebetween with respect to at least one of the average delay and the delay spread.

In step 230, the terminal device performs synchronization measurement on the at least one first reference signal and the at least one second reference signal according to the first indication information.

The terminal device may determine to perform synchronous measurement on the configured at least one first reference signal and at least one second reference signal according to the first indication information of the network device, and further perform synchronous measurement on the at least one first reference signal and the at least one second reference signal. Specifically, the reference signal may be received on the corresponding reference signal resource according to the reference signal resource configured by the network device, and the synchronization measurement may be performed. Taking the example of performing synchronous measurement on a first reference signal and a second reference signal as an example, let the time delay from the first reference signal to the terminal device be t1, and the time delay from the second reference signal to the terminal device be t2, since cooperative transmission is involved, it can be understood that the time delay is the time of receiving the reference signal by the terminal device, and the time delay difference between the first reference signal and the second reference signal is θ (the time delay difference can be equivalently: taking the arrival time of the reference signal as the starting time, and comparing how long the time of receiving the reference signal has elapsed with respect to the starting time). The time domain signal is transmitted with a time delay theta, which means that a phase change proportional to the slope of theta is generated in the frequency domain. The signal s is shifted in time by θ, as shown in the following equationOn the frequency domain signal is generated

Is the phase change of the slope.

The DFT { } means that a time domain signal is subjected to Fourier transform to obtain a frequency domain signal. s is a time domain signal. k is a mark in the signal sequence, k is a positive integer, θ is a time domain offset, X is a frequency domain representation of the signal without delay, Y is a frequency domain representation of the signal with delay, e is a natural logarithm, N is a length of a fourier transform, N is a positive integer greater than or equal to 1, pi is a circumferential ratio, and j is an imaginary unit. It can be seen that the signal undergoes time delay, which is equivalent to that in the frequency domain, the signal undergoes a linear change in phase.

Therefore, the terminal device can perform time delay measurement on the signal in the time domain or perform phase measurement on the signal in the frequency domain. During specific measurement, optionally, if the first reference signal and the second reference signal have the distinguishing reference signal or the comparison reference signal, the synchronous measurement may be to measure a transmission delay difference and/or a phase change of the comparison reference signal with respect to the reference signal, and take the measurement result as the synchronous measurement.

When the reference signal includes at least one reference value, the above final reference value may be first determined by measurement, and then one or more comparison reference signals are measured for propagation delay difference and/or phase change with respect to the final reference value to obtain a measurement result. Alternatively, one or more comparison reference signals may be measured with respect to a plurality of reference signals, respectively, and then the plurality of measurement results are combined, or optionally, the plurality of measurement results may be averaged or further operated according to a preset rule to obtain a final measurement result.

It should be understood that the propagation delay difference and/or the phase variation are merely exemplary means for measuring the propagation offset, and the present application is not limited thereto, and the embodiments of the present application may also adopt means such as a delay ratio, which is not exemplified herein.

The reference signals related to synchronization measurement may not actually meet the expectation of synchronization, and the method for sending and receiving indication in the embodiment of the present application may enable the terminal device to determine which reference signals to perform synchronization measurement through the indication of the network device, so as to determine the signal transmission synchronization condition, such as synchronization deviation.

Fig. 3 is a schematic flow chart diagram of a method 300 of sending and receiving indications provided by an embodiment of the application, shown from the perspective of device interaction. It should be noted that, the present embodiment and the following embodiments are described by taking an example of interaction between a terminal device and a network device, and the present application is not limited thereto. For the convenience of understanding of the solution, in the description, the present embodiment and the following embodiments are developed by using the behavior of multiple sides of the terminal device and the network device, and the overall description is performed from the perspective of multiple interaction parties.

The difference between this embodiment and the embodiment corresponding to fig. 2 is that the embodiment performs synchronous measurement from the perspective of the antenna port group, and the same or similar contents to those of the above embodiments are not repeated herein.

As shown in fig. 3, a method 300 of an embodiment of the present application may include steps 310 to 330. The steps in method 300 are described in detail below:

in step 310, the network device generates first indication information corresponding to a first reference signal resource, where the first indication information is used to indicate M antenna port groups associated with synchronization measurement, and M is a positive integer greater than or equal to 2.

It should be noted that, the first reference signal resource in this embodiment has no inevitable association with the first reference signal related in the embodiment corresponding to fig. 2, the first indication information in this embodiment has no inevitable association with the first indication information in the embodiment corresponding to fig. 2, and the embodiment corresponding to fig. 2 is an independent technical solution description.

The first indication information corresponds to a first reference signal resource, that is, the first indication information is associated with reference signal transmission corresponding to the first reference signal resource, and the M antenna port groups indicated by the first indication information are antenna port groups configured by the network device for transmitting a reference signal corresponding to the first reference signal resource, which is equivalent to that the M antenna port groups cooperate to realize transmission of the reference signal corresponding to the first reference signal resource, so that the network device expects that the transmission of the M antenna port groups configured by the network device is synchronous, otherwise, the performance of receiving or decoding the reference signal by the terminal device may be degraded. One antenna port group may include one or more antenna ports. The signals transmitted on different antenna port groups experience different large scale parameters of the channel. For example, different antenna port groups may represent different directions of reference signal transmission spatially or correspond to different beams, which is not limited in this application. The network device may indicate the antenna port group by the identification of the antenna port group.

The M antenna port groups are associated with the synchronization measurement, and at least one of the M antenna port groups may be used as a reference antenna port group.

The M antenna port groups may be associated with the synchronous measurement, and the at least one antenna port group may be used as a reference antenna port group, and the remaining antenna port groups in the M antenna port groups may be used as comparison antenna port groups, so as to associate the synchronous measurement. The reference antenna port group is an antenna port group of which transmission is used as a reference point, and the comparison antenna port group is an antenna port group which takes the transmission of the reference antenna port group as the reference point and performs transmission deviation calculation compared with the transmission of the reference antenna port group.

When there is at least one reference antenna port group, the terminal device may use the transmissions of the plurality of reference antenna port groups as a reference for measurement. For example, the terminal devices jointly obtain the final reference value. Taking time domain measurement as an example, for example, the terminal device calculates an average arrival time (which may also be referred to as a timing or an average delay) according to the measurement of the reference signals transmitted by the multiple reference antenna port groups, and the average arrival time is used as a final reference value. The average arrival time is only an example, and the specific implementation may be to take an average value, or remove a middle value after the maximum value and the minimum value, or take an average according to the arrival time of the signal transmitted by the multiple reference antenna port groups on the stronger path (the transmission path with higher signal receiving power), and the like, which is not limited in the present application. The average here may be an arithmetic average, a geometric average, a weighted average, or the like. Alternatively, one or more comparison antenna port group transmissions may be measured separately from a plurality of reference antenna port group transmissions.

Optionally, the M antenna port groups include N Code Division Multiplexing (CDM) groups. Multiple antenna ports within a code division multiplexed CDM group may occupy the same time-frequency resources but use different code domain resources, which are distinguished using orthogonal codes in the time and/or frequency domain, where N is a positive integer. One of the antenna port groups may include one or more CDM groups, and antenna ports in one CDM group may not be included in a plurality of the antenna port groups. Signals transmitted by antenna ports within the same CDM group can be considered to be capable of being received simultaneously, and if different CDM groups are associated with synchronization measurements, then the transmissions of different CDM groups are expected to be synchronized.

In step 320, the network device sends the first indication information, and the terminal device receives the first indication information.

If a plurality of network devices in the system perform cooperative transmission, the first indication information may be sent by a primary network device, or the first indication information may be sent by an enumerated secondary network device, which is not limited in this application. The main network device may refer to a network device to which the terminal device is connected, or a network device to which the terminal device performs RRC connection, or may be a network device set by other rules, which is not limited in this application.

The specific way of implementing the indication with respect to the first indication information is not limited, and some examples are given below, and it should be understood that the present application is not limited thereto:

example 1, some antenna ports (e.g., antenna ports within a CDM group indicated by the preset certain CDM group identifiers) are preset to be reference antenna ports according to a preset rule, such as within one CSI-RS resource. When the network equipment indicates the terminal equipment to carry out synchronous measurement by using the CSI-RS, the terminal equipment takes the antenna ports which meet preset conditions in the CSI-RS resource as reference antenna ports to form one or more reference antenna port groups, and takes other antenna ports as comparison antenna ports to form one or more comparison antenna port groups.

Example 2, the network device configures quasi co-location information for a certain CSI-RS, wherein at least a reference signal indication is included. When the reference signal configured in the configuration information of the quasi-co-location information in the configuration information of a certain CSI-RS resource is the CSI-RS resource itself, the terminal device knows that a part of antenna ports in the CSI-RS resource are used as reference antenna ports (but which antenna ports are realized by the preset rule in the example 1, or the quasi-co-location information includes indication information of the antenna ports (or antenna port groups) in addition to the indication of the reference signal). This is illustrated with a configuration example similar to the embodiment of fig. 2:

the network device may configure CSI-RS resource #1 (corresponding to CSI-RS #1) as TCI #1 to notify the terminal device:

TCI#1

CSI-RS resource#1

then, the network device may configure QCL information of the CSI-RS #1 for the terminal device, where the TCI #1 carries a reference signal indicator (i.e. the above configured CSI-RS resource #1), so that the reference signal configured in the configuration information of the QCL information is a resource of the CSI-RS # 1:

CSI-RS resource#1

TCI#1

example 3, the network device configuring a reference signal for synchronization measurement, the network device further explicitly configuring for the terminal device which antenna ports (or antenna port groups) within this reference signal resource are as reference antenna ports (or antenna port groups), wherein the reference antenna ports may constitute one or more reference antenna port groups.

In step 330, the terminal device performs synchronous measurement on the M antenna port groups according to the first indication information.

The terminal device may determine to perform synchronous measurement on the transmission of the configured M antenna port groups according to the first indication information of the network device, and further perform synchronous measurement on the transmission of the configured M antenna port groups, and specifically, may receive a reference signal on the first reference signal resource configured by the network device, and perform synchronous measurement on channels corresponding to the antenna port groups. Taking the example of performing synchronous measurement on the antenna port group 1 and the antenna port group 2, it is noted that the time delay from the reference signal transmitted on the channel corresponding to the antenna port group 1 to the terminal device on the first reference signal resource is t1, and the time delay from the reference signal transmitted on the channel corresponding to the antenna port group 2 to the terminal device on the first reference signal resource is t2, since cooperative transmission is involved, it can be understood that the time delay is the time of receiving the reference signal by the terminal device, and the difference in transmission delay between the antenna port group 1 and the antenna port group 2 is θ (the difference in delay can be equivalently: how long the time has elapsed from the arrival time of the reference signal transmitted on the channel corresponding to the antenna port group 1 to the start time, to the reception time of the reference signal transmitted on the channel corresponding to the antenna port group 2). The time-domain signal is transmitted with a time delay of θ, which means that a phase change proportional to θ as a slope is generated in the frequency domain, and the embodiment corresponding to fig. 2 has been described and is not described herein again.

Therefore, the terminal device can perform time delay measurement on the signal in the time domain or perform phase measurement on the signal in the frequency domain. During specific measurement, optionally, if the antenna port group has a differentiated reference antenna port group or a comparative antenna port group, the synchronous measurement may be measurement of a transmission delay difference and/or a phase change of the comparative antenna port group with respect to the reference antenna port group, and the measurement result is taken as the synchronous measurement.

When the reference antenna port group includes at least one antenna port, the final reference value may be determined by measurement, and then the measurement of the transmission delay difference and/or the phase change is performed on one or more comparison antenna port group transmissions with respect to the final reference value, so as to obtain a measurement result. Alternatively, one or more comparison antenna port groups may be used to measure the transmission of multiple reference antenna port groups, and then multiple measurement results are combined, or optionally, multiple measurement results may be averaged or further processed according to a preset rule to obtain a final measurement result.

The transmission of the M antenna port groups related to the synchronization measurement may not actually meet the expectation of synchronization, and the method for sending and receiving the indication in the embodiment of the present application may enable the terminal device to determine the synchronization measurement through the indication of the network device, so as to determine the transmission synchronization condition of the antenna port groups, such as the synchronization deviation.

Fig. 4 is a schematic flow chart diagram of a method 400 of sending and receiving indications provided by an embodiment of the application, shown from a device interaction perspective. The embodiment corresponding to fig. 4 is based on the embodiment corresponding to fig. 2 or fig. 3, and is different from the embodiment corresponding to fig. 2 or fig. 3 in that the embodiment emphasizes the following description of the scheme after the terminal device determines to perform the synchronization measurement according to the first indication information, and the same or related contents as or to the embodiment corresponding to fig. 2 or fig. 3 are not repeated in this embodiment.

As shown in fig. 4, a method 400 of an embodiment of the present application may include steps 410 through 440. The steps in method 400 are described in detail below.

In step 410, the network device generates first indication information.

In step 420, the network device sends the first indication information, and the terminal device receives the first indication information.

In step 430, the terminal device performs synchronization measurement according to the first indication information.

The steps 410-430 are related to the steps 230 in fig. 2 or the steps 310-330 in fig. 3, and are not described herein again.

In step 440, the terminal device sends second indication information to the network device, where the second indication information is used to indicate a result of the synchronization measurement; and/or the terminal equipment sends Channel State Information (CSI) to the network equipment, and the CSI is obtained according to the result of the synchronous measurement.

Optionally, the CSI at least includes a precoding matrix indicator PMI and/or a channel quality indicator CQI, and the PMI and/or CQI is obtained according to the result of the synchronization measurement.

Optionally, the second indication information may be carried in CSI and reported to the network device.

The terminal equipment carries out synchronous measurement, and after the synchronous measurement result is obtained, the synchronous measurement result can be reported to the network equipment, so that the network equipment can adjust the transmitted signals according to the report of the terminal equipment, the transmission synchronization is ensured, and the performance of cooperative transmission is further ensured. It can be understood that reporting the result of the synchronous measurement to the network device may be performed in an explicit or implicit, direct or indirect indication manner. The terminal device may directly report the synchronization measurement result, and may perform independent or associated coding with other Uplink Control Information (UCI) when directly reporting the synchronization measurement result. Wherein there is a well-defined sequential relationship between this result and other UCI information. For example, when the terminal device reports the information about the transmission delay difference and/or the phase change, the terminal device reports a result of a function of the information about the transmission delay difference and/or the phase change, where the function may be a quantization function, and the quantization function may provide a uniform or non-uniform quantization method in a reporting interval (i.e., a delay difference and/or a phase change interval). For example, the delay information measured by the terminal device may be quantitatively reported. If the quantization is to compare the time delay information with the condition, selecting the result meeting the condition as the report quantity.

An example of quantization is as follows: in the interval range of the time delay reporting, different positions of the time delay information in the interval correspond to different reporting information. If the delay time meets the first interval, the reporting amount is the first value, and the first interval can be

[ T1, T2], or (T1, T2), or [ T1, T2), or (T1, T2], wherein T1< ═ T2, T1, T2 are boundary establishing reference points of the interval. If the delay time meets the second interval, the report amount is the second value, and the second interval may be an interval orthogonal to the first interval, which is not limited in the present application. In addition, when the delay is greater than a first threshold (upper limit of quantization), the terminal may report a specific value, or the terminal may report specific information; when the delay is smaller than the second threshold (lower limit of quantization), the terminal may report a specific value, or the terminal may report specific information. The meaning of the specific information is that the information can be used to indicate that the delay information is beyond the range expected by the terminal. The different intervals may be of different lengths, i.e. non-uniform quantization.

The methods are adopted because the delay information or the phase change information measured by the terminal may be a continuous quantity, but only some discrete information may be reported during reporting, so that some means is needed to map the delay information or the phase change information with the reported information.

The terminal device may further modulate the information of the transmission delay difference and/or the phase change, or the information of the transmission delay difference and/or the phase change calculated through the function, on other signals to transmit, so that the network device implicitly obtains the information. The other signals may be PTRS, channel Sounding Reference Signal (SRS), demodulation reference signal (DMRS), and the like. For example, the sequence used for transmitting the SRS is multiplied by a base sequence by a phase. Then, in this place, the measured phase change can be transformed with the phase of the SRS itself to be the phase of the SRS sequence. The phase of the SRS itself refers to the amount of cyclic shift of the SRS. The conversion here may refer to multiplication, addition, or the like of both.

The terminal device performs synchronous measurement, and after obtaining the result of the synchronous measurement, the terminal device may perform channel estimation and calculate and determine CSI according to the result of the synchronous measurement, that is, the terminal device considers transmission delay and/or phase, and performs measurement of channel quality based on an equivalent channel after assuming transmission delay and/or phase adjustment. Taking the precoding matrix indicator PMI and/or the channel quality indicator CQI included in the CSI as an example, the PMI reported by the terminal device may be a PMI calculated by an equivalent channel with transmission delay and/or phase adjustment taken into consideration. The CQI reported by the terminal device may be a CQI calculated by considering an equivalent channel after transmission delay and/or phase adjustment. That is, when the terminal calculates the CQI, PMI, and the like, it is assumed that the transmission of the base station is adjusted in transmission delay and/or phase according to the transmission delay and/or phase, that is, it is assumed that the cooperative transmission is synchronous (no deviation exists, or the deviation is smaller than a certain threshold, and is considered as synchronous within the threshold). For the calculation of the specific CSI, reference may be made to the prior art, and details are not repeated herein.

In the method for sending and receiving the indication in the embodiment of the application, the measurement result and/or the channel measurement result are reported to the network device by reporting the synchronization measurement result to the network device, or after adjusting the estimated PMI and/or CQI. The network device may adjust the time of the signal transmission in the time domain or adjust the phase of the signal transmission in the frequency domain based on the received information.

It should be noted that the illustration of the signal propagation path in fig. 1 does not limit the scenario in which the network device and the terminal device only have a primary path (a path through which the signal propagates from the network device directly to the terminal device)), and the above embodiments of fig. 2 to fig. 4 can be applied in any scenario of a single path (only a primary path) or a multi path (having a reflection path, i.e., a path through which the signal propagates from the network device to the reflector and then from the reflector to the terminal device). For the measurement of the time delay (or called arrival time) of signal propagation in a single-path or multi-path scenario, related schemes exist in the prior art, and are not described herein again.

Fig. 5 is a schematic flow chart diagram of a method 500 of sending and receiving indications provided by an embodiment of the application, shown from the perspective of device interaction. The embodiment corresponding to fig. 5 is based on the embodiments corresponding to fig. 2 to fig. 4, and is different from the embodiments corresponding to fig. 2 to fig. 4 in that the interaction between the network devices is emphasized in the embodiment, which is a subsequent description of a scheme after reporting a result of the synchronization measurement, and the same or related contents as or to the embodiments corresponding to fig. 2 to fig. 4 are not repeated in this embodiment.

As shown in fig. 5, the method 500 of the embodiment of the present application may include steps 510 to 550. The steps in method 500 are described in detail below.

In step 510, the first network device receives a synchronization measurement result reported by the terminal device.

Optionally, the first network device is a network device of a main serving cell to which the terminal device is accessed. Of course, the first network device may also be other selected network devices, and may be the same network device or a different network device as the network device that instructs the terminal device to perform the synchronous measurement.

In step 520, when the uplink resource is not coordinated between the first network device and the at least one second network device (i.e., the at least one second network device does not know the location of the uplink resource and cannot receive the result of the synchronization measurement), the first network device sends the result of the synchronization measurement to the at least one second network device, or the first network device sends the adjustment amount information to the at least one second network device.

When the transmission parameters can be adjusted according to the result of the synchronous measurement based on the predetermined adjustment rule among the network devices, the first network device sends the result of the synchronous measurement to the at least one second network device. If the second network device cannot acquire the predetermined adjustment rule, optionally, the first network device may directly send the adjustment amount information of the transmission parameter to the at least one second network device. It is understood that the transmission reference includes parameters such as the transmission time, phase, etc. of the signal.

In step 530, at least one second network device receives the result of the synchronization measurement reported by the terminal device.

When the first network device and at least one second network device coordinate uplink resources (that is, the first network device and the at least one second network device both know the location of the uplink resources and can receive the result of the synchronization measurement), the first network device does not need to send the result of the synchronization measurement to the at least one second network device.

It will be appreciated that steps 530 and 520 are optional steps, the existence of which depends on the above conditions. When there is a condition for step 530, step 530 does not necessarily have a precedence relationship with step 510.

In step 540, the first network device adjusts transmission parameters for communication with the terminal device according to the result of the synchronization measurement.

In step 550, the at least one second network device adjusts transmission parameters for communication with the terminal device according to the synchronization measurement result/adjustment amount information.

According to the result of the synchronization measurement, each network device may adjust the transmission parameter according to a predetermined adjustment rule, for example, the base station that may send the comparison reference signal may adjust the transmission parameter according to a synchronization deviation of the comparison reference signal from the reference signal in the synchronization measurement, for example, time adjustment may be performed on signal transmission in a time domain, or phase adjustment may be performed on signal transmission in a frequency domain, so as to avoid synchronization deviation. Or the base station sending the reference signal carries out transmission parameter adjustment according to the synchronization deviation of the comparison reference signal and the reference signal in the synchronous measurement so as to avoid the synchronization deviation. The base station sending the comparison reference signal and the base station sending the reference signal can obtain an intermediate value according to the synchronization deviation, and the base station sending the comparison reference signal and the base station sending the reference signal both carry out transmission reference adjustment so as to avoid the synchronization deviation.

When the second network device cannot adjust the transmission parameters according to the result of the synchronous measurement, the second network device may be directly instructed to adjust in a manner that the first network device sends the adjustment amount information.

It is to be understood that the first network device may send the result of the synchronization measurement to the at least one second network device, may send the adjustment amount information to the at least one second network device, and may send both the result of the synchronization measurement and the adjustment amount information to the at least one second network device.

Therefore, steps 540 and 550 are optional steps, and have no necessary sequence, and the existence of the two steps depends on the corresponding conditions.

The method provided by the embodiment of the present application is described in detail above with reference to fig. 2 to 5. Hereinafter, the communication device according to the embodiment of the present application will be described in detail with reference to fig. 6 to 8.

Fig. 6 is a schematic block diagram of a communication device provided in an embodiment of the present application. As shown, the communication device 1000 may include a communication unit 1100 and a processing unit 1200.

In one possible design, the communication apparatus 1000 may correspond to the terminal device in the above method embodiment, and may be, for example, the terminal device or a chip configured in the terminal device.

Specifically, the communication apparatus 1000 may correspond to the terminal device in the method 200 according to the embodiment of the present application, and the communication apparatus 1000 may include a unit for executing the method executed by the terminal device in the method 200 in fig. 2. Also, the units in the communication device 1000 and the other operations and/or functions described above are respectively for implementing the corresponding flows of the method 200 in fig. 2.

Wherein, when the communication device 1000 is used to execute the method 200 in fig. 2, the communication unit 1100 may be used to execute the step 220 in the method 200, and the processing unit 1200 may be used to execute the step 230 in the method 200.

Specifically, the communication apparatus 1000 may correspond to the terminal device in the method 300 according to the embodiment of the present application, and the communication apparatus 1000 may include a unit for executing the method executed by the terminal device in the method 300 in fig. 3. Also, the units and other operations and/or functions described above in the communication apparatus 1000 are respectively for implementing the corresponding flows of the method 300 in fig. 3.

Wherein, when the communication device 1000 is used to execute the method 300 in fig. 3, the communication unit 1100 may be used to execute the step 320 in the method 300, and the processing unit 1200 may be used to execute the step 330 in the method 300.

Specifically, the communication apparatus 1000 may correspond to the terminal device in the method 400 according to the embodiment of the present application, and the communication apparatus 1000 may include a unit for executing the method executed by the terminal device in the method 400 in fig. 4. Also, the units and other operations and/or functions described above in the communication apparatus 1000 are respectively for implementing the corresponding flows of the method 400 in fig. 4.

Wherein, when the communication device 1000 is configured to execute the method 400 in fig. 4, the communication unit 1100 is configured to execute the steps 420 and 440 in the method 400, and the processing unit 1200 is configured to execute the step 430 in the method 400.

Specifically, the communication apparatus 1000 may correspond to the terminal device in the method 500 according to the embodiment of the present application, and the communication apparatus 1000 may include a unit for executing the method executed by the terminal device in the method 500 in fig. 5. Also, the units and other operations and/or functions described above in the communication apparatus 1000 are respectively for implementing the corresponding flow of the method 500 in fig. 5.

Wherein, when the communication apparatus 1000 is configured to execute the method 500 in fig. 5, the communication unit 1100 is configured to execute the actions related to the terminal device transmission in steps 510 and 530 in the method 500, and the processing unit 1200 is configured to execute the corresponding steps related to the processing.

It should be understood that the specific processes of the units for executing the corresponding steps are already described in detail in the above method embodiments, and therefore, for brevity, detailed descriptions thereof are omitted.

It is further understood that when the communication apparatus 1000 is a terminal device, the communication unit 1100 in the communication apparatus 1000 may correspond to the transceiver 2020 in the terminal device 2000 shown in fig. 7, and the processing unit 1200 in the communication apparatus 1000 may correspond to the processor 2010 in the terminal device 2000 shown in fig. 7.

It should also be understood that when the communication apparatus 1000 is a chip configured in a terminal device, the communication unit 1100 in the communication apparatus 1000 may be an input/output interface.

In another possible design, the communication apparatus 1000 may correspond to the network device in the above method embodiment, and may be, for example, a network device or a chip configured in a network device.

Specifically, the communication apparatus 1000 may correspond to the network device in the method 200 according to the embodiment of the present application, and the communication apparatus 1000 may include a unit for executing the method executed by the network device in the method 200 of fig. 2. Also, the units in the communication device 1000 and the other operations and/or functions described above are respectively for implementing the corresponding flows of the method 200 in fig. 2.

Wherein, when the communication device 1000 is used to execute the method 200 in fig. 2, the communication unit 1100 may be used to execute the step 220 in the method 200, and the processing unit 1200 may be used to execute the step 210 in the method 200.

Specifically, the communication apparatus 1000 may correspond to the network device in the method 300 according to the embodiment of the present application, and the communication apparatus 1000 may include a unit for executing the method executed by the network device in the method 300 of fig. 3. Also, the units and other operations and/or functions described above in the communication apparatus 1000 are respectively for implementing the corresponding flows of the method 300 in fig. 3.

Wherein, when the communication device 1000 is used to execute the method 300 in fig. 3, the communication unit 1100 may be used to execute the step 320 in the method 300, and the processing unit 1200 may be used to execute the step 310 in the method 300.

Specifically, the communication apparatus 1000 may correspond to the network device in the method 400 according to the embodiment of the present application, and the communication apparatus 1000 may include a unit for executing the method executed by the network device in the method 400 of fig. 4. Also, the units and other operations and/or functions described above in the communication apparatus 1000 are respectively for implementing the corresponding flows of the method 400 in fig. 4.

Wherein, when the communication apparatus 1000 is configured to execute the method 400 in fig. 4, the communication unit 1100 is configured to execute the step 420 and the step 440 related to network device reception in the method 400, and the processing unit 1200 is configured to execute the step 410 in the method 400.

Specifically, the communication apparatus 1000 may correspond to the network device in the method 500 according to the embodiment of the present application, and the communication apparatus 1000 may include a unit for performing the method performed by the first network device in the method 500 of fig. 5 or a unit for performing the method performed by the second network device in the method 500 of fig. 5. Also, the units and other operations and/or functions described above in the communication apparatus 1000 are respectively for implementing the corresponding flow of the method 500 in fig. 5.

Wherein, when the communication apparatus 1000 is configured to perform the actions of the first network device in the method 500 of fig. 5, the communication unit 1100 is configured to perform the steps of step 510 and step 520 in the method 500 related to the receiving and transmitting of the first network device, and the processing unit 1200 is configured to perform the actions of step 540 in the method 500 related to the first network device.

Wherein, when the communication apparatus 1000 is configured to perform the actions of the second network device in the method 500 of fig. 5, the communication unit 1100 is configured to perform the steps of step 520 and step 530 related to the reception by the second network device in the method 500, and the processing unit 1200 is configured to perform the actions related to the second network device in step 550 in the method 500.

It should also be understood that when the communication apparatus 1000 is a network device, the communication unit in the communication apparatus 1000 may correspond to the transceiver 3200 in the network device 3000 shown in fig. 8, and the processing unit 1200 in the communication apparatus 1000 may correspond to the processor 3100 in the network device 3000 shown in fig. 8.

It should also be understood that when the communication device 1000 is a chip configured in a network device, the communication unit 1100 in the communication device 1000 may be an input/output interface.

Fig. 7 is a schematic structural diagram of a terminal device 2000 according to an embodiment of the present application. The terminal device 2000 can be applied to the system shown in fig. 1, and performs the functions of the terminal device in the above method embodiment.

As shown, the terminal device 2000 includes a processor 2010 and a transceiver 2020. Optionally, the terminal device 2000 further comprises a memory 2030. The processor 2010, the transceiver 2002 and the memory 2030 may be in communication with each other via the interconnection path to transfer control and/or data signals, the memory 2030 may be used for storing a computer program, and the processor 2010 may be used for retrieving and executing the computer program from the memory 2030 to control the transceiver 2020 to transmit and receive signals. Optionally, the terminal device 2000 may further include an antenna 2040, configured to transmit uplink data or uplink control signaling output by the transceiver 2020 by using a wireless signal.

The processor 2010 and the memory 2030 may be combined into a processing device, and the processor 2010 is configured to execute the program codes stored in the memory 2030 to achieve the above functions. In particular, the memory 2030 may be integrated with the processor 2010 or may be separate from the processor 2010. The processor 2010 may correspond to the processing unit in fig. 6.

The transceiver 2020 may correspond to the communication unit in fig. 6, and may also be referred to as a transceiver unit. The transceiver 2020 may include a receiver (or receiver, receiving circuit) and a transmitter (or transmitter, transmitting circuit). Wherein the receiver is used for receiving signals, and the transmitter is used for transmitting signals.

It should be understood that terminal device 2000 shown in fig. 7 is capable of implementing various processes involving the terminal device in the method embodiments shown in fig. 2-4. The operations and/or functions of the modules in the terminal device 2000 are respectively to implement the corresponding flows in the above-described method embodiments. Specifically, reference may be made to the description of the above method embodiments, and the detailed description is appropriately omitted herein to avoid redundancy.

The processor 2010 may be configured to perform the actions described in the preceding method embodiments that are implemented within the terminal device, and the transceiver 2020 may be configured to perform the actions described in the preceding method embodiments that the terminal device transmits to or receives from the network device. Please refer to the description of the previous embodiment of the method, which is not repeated herein.

Optionally, the terminal device 2000 may further include a power supply 2050 for supplying power to various devices or circuits in the terminal device.

In addition, in order to further improve the functions of the terminal device, the terminal device 2000 may further include one or more of an input unit 2060, a display unit 2070, an audio circuit 2080, a camera 2090, a sensor 2100, and the like, and the audio circuit may further include a speaker 2082, a microphone 2084, and the like.

Fig. 8 is a schematic structural diagram of a network device provided in the embodiment of the present application, which may be a schematic structural diagram of a base station, for example. The base station 3000 can be applied to the system shown in fig. 1, and performs the functions of the network device in the above method embodiment.

As shown, the base station 3000 may include one or more radio frequency units, such as a Remote Radio Unit (RRU) 3100 and one or more baseband units (BBUs) (also referred to as digital units, DUs) 3200. The RRU 3100 may be referred to as a transceiver unit and corresponds to the communication unit 1200 in fig. 6. Alternatively, the transceiving unit 3100 may also be referred to as a transceiver, transceiving circuit, or transceiver, etc., which may comprise at least one antenna 3101 and a radio frequency unit 3102. Alternatively, the transceiving unit 3100 may include a receiving unit and a transmitting unit, the receiving unit may correspond to a receiver (or receiver, receiving circuit), and the transmitting unit may correspond to a transmitter (or transmitter, transmitting circuit). The RRU 3100 part is mainly used for transceiving and converting radio frequency signals to baseband signals, for example, for sending indication information to a terminal device. The BBU 3200 section is mainly used for performing baseband processing, controlling a base station, and the like. The RRU 3100 and the BBU 3200 may be physically disposed together or may be physically disposed separately, i.e. distributed base stations.

The BBU 3200 is a control center of the base station, and may also be referred to as a processing unit, and may correspond to the processing unit 1100 in fig. 6, and is mainly used for completing baseband processing functions, such as channel coding, multiplexing, modulation, spreading, and the like. For example, the BBU (processing unit) may be configured to control the base station to perform an operation procedure related to the network device in the foregoing method embodiment, for example, to generate the foregoing indication information.

In an example, the BBU 3200 may be formed by one or more boards, and the boards may collectively support a radio access network of a single access system (e.g., an LTE network), or may respectively support radio access networks of different access systems (e.g., an LTE network, a 5G network, or other networks). The BBU 3200 also includes a memory 3201 and a processor 3202. The memory 3201 is used to store necessary instructions and data. The processor 3202 is used for controlling the base station to perform necessary actions, for example, for controlling the base station to execute the operation flow related to the network device in the above method embodiment. The memory 3201 and processor 3202 may serve one or more boards. That is, the memory and processor may be provided separately on each board. Multiple boards may share the same memory and processor. In addition, each single board can be provided with necessary circuits.

It should be appreciated that base station 3000 shown in fig. 8 is capable of implementing various processes involving network devices in the method embodiments of fig. 2-5. The operations and/or functions of the respective modules in the base station 3000 are respectively for implementing the corresponding flows in the above-described method embodiments. Specifically, reference may be made to the description of the above method embodiments, and the detailed description is appropriately omitted herein to avoid redundancy.

BBU 3200 as described above can be used to perform actions described in previous method embodiments as being implemented internally by a network device, while RRU 3100 can be used to perform actions described in previous method embodiments as being sent by or received from a terminal device by a network device. Please refer to the description of the previous embodiment of the method, which is not repeated herein.

The embodiment of the application also provides a processing device, which comprises a processor and an interface; the processor is used for executing the communication method in the method embodiment.

It should be understood that the processing means may be a chip. For example, the processing device may be a Field Programmable Gate Array (FPGA), an Application Specific Integrated Circuit (ASIC), a system on chip (SoC), a Central Processing Unit (CPU), a Network Processor (NP), a digital signal processing circuit (DSP), a Microcontroller (MCU), a Programmable Logic Device (PLD), or other integrated chips.

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

It should be noted that the processor in the embodiments of the present application may be an integrated circuit chip having signal processing capability. In implementation, the steps of the above method embodiments may be performed by integrated logic circuits of hardware in a processor or instructions in the form of software. The processor described above may be a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components. The various methods, steps, and logic blocks disclosed in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in a memory, and a processor reads information in the memory and completes the steps of the method in combination with hardware of the processor.

It will be appreciated that the memory in the embodiments of the subject application can be either volatile memory or nonvolatile memory, or can include both volatile and nonvolatile memory. The non-volatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an electrically Erasable EPROM (EEPROM), or a flash memory. Volatile memory can be Random Access Memory (RAM), which acts as external cache memory. By way of example, but not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic Random Access Memory (SDRAM), double data rate SDRAM, enhanced SDRAM, SLDRAM, Synchronous Link DRAM (SLDRAM), and direct rambus RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

According to the method provided by the embodiment of the present application, the present application further provides a computer program product, which includes: computer program code which, when run on a computer, causes the computer to perform the method of any of the embodiments shown in figures 2-4.

According to the method provided by the embodiment of the present application, the present application further provides a computer-readable medium, which stores program codes, and when the program codes are executed on a computer, the computer is caused to execute the method of any one of the embodiments shown in fig. 2 to 4.

According to the method provided by the embodiment of the present application, the present application further provides a system, which includes the foregoing one or more terminal devices and one or more network devices.

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

The network device in the foregoing device embodiments completely corresponds to the terminal device and the network device or the terminal device in the method embodiments, and the corresponding module or unit executes the corresponding steps, for example, the communication unit (transceiver) executes the steps of receiving or transmitting in the method embodiments, and other steps besides transmitting and receiving may be executed by the processing unit (processor). The functions of the specific elements may be referred to in the respective method embodiments. The number of the processors may be one or more.

As used in this specification, the terms "component," "module," "system," and the like are intended to refer to a computer-related entity, either hardware, firmware, a combination of hardware and software, or software in execution. For example, a component may be, but is not limited to being, a process running on a processor, an object, an executable, a thread of execution, a program, and/or a computer. By way of illustration, both an application running on a computing device and the computing device can be a component. One or more components can reside within a process and/or thread of execution and a component can be localized on one computer and/or distributed between 2 or more computers. In addition, these components can execute from various computer readable media having various data structures stored thereon. The components may communicate by way of local and/or remote processes such as in accordance with a signal having one or more data packets (e.g., data from two components interacting with another component in a local system, distributed system, and/or across a network such as the internet with other systems by way of the signal).

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

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

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

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

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

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

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

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

Claims

1. A method of receiving an indication, comprising:

the terminal equipment receives first indication information from network equipment, wherein the first indication information is used for indicating at least one first reference signal and at least one second reference signal to be associated with synchronous measurement; the first reference signal is a reference signal, and the second reference signal is a comparison reference signal; or, the first reference signal is a comparison reference signal, and the second reference signal is a reference signal; the synchronous measurement includes: measuring a synchronization deviation of the at least one alignment reference signal relative to the at least one reference signal;

the terminal equipment carries out synchronous measurement on the at least one first reference signal and the at least one second reference signal according to the first indication information;

wherein the first indication information includes transmission configuration indication status TCIstate information for indicating that a reference signal resource corresponding to the at least one first reference signal and a reference signal resource corresponding to the at least one second reference signal have a quasi-co-located QCL relationship.

2. The method of claim 1, wherein the synchronously measuring the at least one first reference signal and the at least one second reference signal comprises: the propagation delay difference and/or the phase change of the at least one comparison reference signal relative to the at least one reference signal is measured.

3. The method of claim 1, further comprising:

and the terminal equipment sends second indication information to the network equipment, wherein the second indication information is used for indicating the result of the synchronous measurement.

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

and the terminal equipment sends Channel State Information (CSI) to the network equipment, and the CSI is obtained according to the result of the synchronous measurement.

5. The method of claim 1, wherein the first indication information further comprises an indication of a channel large scale parameter.

6. A method for transmitting an indication, comprising:

the network equipment generates first indication information, wherein the first indication information is used for indicating at least one first reference signal and at least one second reference signal to be associated with synchronous measurement; the first reference signal is a reference signal, and the second reference signal is a comparison reference signal; or, the first reference signal is a comparison reference signal, and the second reference signal is a reference signal; the synchronous measurement includes: measuring a synchronization deviation of the at least one alignment reference signal relative to the at least one reference signal;

the network equipment sends the first indication information to terminal equipment;

7. The method according to claim 6, wherein the first indication information is specifically used for indicating that the propagation delay difference and/or the phase change of at least one comparative reference signal with respect to at least one reference signal is measured.

8. The method of claim 6, further comprising:

and the network equipment receives second indication information from the terminal equipment, wherein the second indication information is used for indicating the result of the synchronous measurement.

9. The method according to any one of claims 6-8, further comprising:

and the network equipment receives Channel State Information (CSI) from the terminal equipment, and the CSI is obtained according to the result of the synchronous measurement.

10. The method of claim 6, wherein the first indication information further comprises an indication of a channel large scale parameter.

11. A method of receiving an indication, comprising:

the method comprises the steps that terminal equipment receives first indication information corresponding to a first reference signal resource from network equipment, wherein the first indication information is used for indicating M antenna port groups related to synchronous measurement, and M is a positive integer greater than or equal to 2; wherein the M antenna port groups comprise at least one reference antenna port group; the synchronous measurement includes: measuring synchronization deviations of other antenna port groups except the at least one reference antenna port group in the M antenna port groups relative to the at least one reference antenna port group;

and the terminal equipment carries out synchronous measurement on the M antenna port groups according to the first indication information.

12. The method of claim 11, wherein the performing the synchronized measurements on the M antenna port groups comprises: and measuring the transmission delay difference and/or the phase change of other antenna port groups except the at least one reference antenna port group in the M antenna port groups relative to the at least one reference antenna port group.

13. The method of claim 11, further comprising:

14. The method according to any one of claims 11-13, further comprising:

15. The method of any of claims 11-13, wherein the M antenna port groups comprise N code division multiplexed, CDM, groups, where N is a positive integer.

16. A method for transmitting an indication, comprising:

the network equipment generates first indication information corresponding to a first reference signal resource, wherein the first indication information is used for indicating M antenna port groups associated with synchronous measurement, and M is a positive integer greater than or equal to 2; wherein the M antenna port groups comprise at least one reference antenna port group; the synchronous measurement includes: measuring synchronization deviations of other antenna port groups except the at least one reference antenna port group in the M antenna port groups relative to the at least one reference antenna port group;

and the network equipment sends the first indication information to terminal equipment.

17. The method according to claim 16, wherein the first indication information is specifically used for indicating that propagation delay differences and/or phase changes of antenna port groups other than the at least one reference antenna port group among the M antenna port groups are measured with respect to the at least one reference antenna port group.

18. The method of claim 16, further comprising:

19. The method according to any one of claims 16-18, further comprising:

20. The method of any of claims 16-18, wherein the M antenna port groups comprise N code division multiplexed, CDM, groups, where N is a positive integer.

21. An apparatus for receiving an indication, comprising:

a transceiver unit, configured to receive first indication information from a network device, where the first indication information is used to indicate that at least one first reference signal and at least one second reference signal are associated with synchronization measurement; the first reference signal is a reference signal, and the second reference signal is a comparison reference signal; or, the first reference signal is a comparison reference signal, and the second reference signal is a reference signal; the synchronous measurement includes: measuring a synchronization deviation of the at least one alignment reference signal relative to the at least one reference signal;

a processing unit, configured to perform synchronous measurement on the at least one first reference signal and the at least one second reference signal according to the first indication information;

22. The apparatus of claim 21, wherein the processing unit is configured to: and measuring the transmission delay difference and/or phase change of at least one comparison reference signal relative to at least one reference signal according to the first indication information.

23. The apparatus of claim 21, wherein the transceiver unit is further configured to:

and sending second indication information to the network equipment, wherein the second indication information is used for indicating the result of the synchronous measurement.

24. The apparatus according to any of claims 21-23, wherein the transceiver unit is further configured to:

and sending Channel State Information (CSI) to the network equipment, wherein the CSI is obtained according to the result of the synchronous measurement.

25. The apparatus of claim 21, wherein the first indication information further comprises an indication of a channel large scale parameter.

26. An apparatus for transmitting an indication, comprising:

a processing unit, configured to generate first indication information, where the first indication information is used to indicate that at least one first reference signal and at least one second reference signal are associated with synchronization measurement; the first reference signal is a reference signal, and the second reference signal is a comparison reference signal; or, the first reference signal is a comparison reference signal, and the second reference signal is a reference signal; the synchronous measurement includes: measuring a synchronization deviation of the at least one alignment reference signal relative to the at least one reference signal;

the receiving and sending unit is used for sending the first indication information to the terminal equipment;

27. The apparatus according to claim 26, wherein the first indication information is specifically used for indicating that propagation delay differences and/or phase changes of at least one comparative reference signal with respect to at least one reference signal are measured.

28. The apparatus of claim 26, wherein the transceiver unit is further configured to:

and receiving second indication information from the terminal equipment, wherein the second indication information is used for indicating the result of the synchronous measurement.

29. The apparatus according to any of claims 26-28, wherein the transceiver unit is further configured to:

and receiving Channel State Information (CSI) from the terminal equipment, wherein the CSI is obtained according to the result of the synchronous measurement.

30. The apparatus of claim 26, wherein the first indication information further comprises an indication of a channel large scale parameter.

31. An apparatus for receiving an indication, comprising:

a transceiver unit, configured to receive first indication information corresponding to a first reference signal resource from a network device, where the first indication information is used to indicate M antenna port groups associated with synchronous measurement, and M is a positive integer greater than or equal to 2; wherein the M antenna port groups comprise at least one reference antenna port group; the synchronous measurement includes: measuring synchronization deviations of other antenna port groups except the at least one reference antenna port group in the M antenna port groups relative to the at least one reference antenna port group;

and the processing unit is used for carrying out synchronous measurement on the M antenna port groups according to the first indication information.

32. The apparatus of claim 31, wherein the processing unit is configured to: and measuring the transmission delay difference and/or the phase change of other antenna port groups except the at least one reference antenna port group in the M antenna port groups relative to the at least one reference antenna port group according to the first indication information.

33. The apparatus of claim 31, wherein the transceiver unit is further configured to:

34. The apparatus according to any of claims 31-33, wherein the transceiver unit is further configured to:

35. The apparatus of any of claims 31-33, wherein the M antenna port groups comprise N code division multiplexed, CDM, groups, and wherein N is a positive integer.

36. An apparatus for transmitting an indication, comprising:

a processing unit, configured to generate first indication information corresponding to a first reference signal resource, where the first indication information is used to indicate M antenna port groups associated with synchronization measurement, and M is a positive integer greater than or equal to 2; wherein the M antenna port groups comprise at least one reference antenna port group; the synchronous measurement includes: measuring synchronization deviations of other antenna port groups except the at least one reference antenna port group in the M antenna port groups relative to the at least one reference antenna port group;

and the transceiving unit is used for sending the first indication information to the terminal equipment.

37. The apparatus according to claim 36, wherein the first indication information is specifically used for indicating that propagation delay differences and/or phase changes of antenna port groups other than the at least one reference antenna port group among the M antenna port groups are measured with respect to the at least one reference antenna port group.

38. The apparatus of claim 36, wherein the transceiver unit is further configured to:

39. The apparatus according to any of claims 36-38, wherein the transceiver unit is further configured to:

40. The apparatus of any of claims 36-38, wherein the M antenna port groups comprise N code division multiplexed, CDM, groups, where N is a positive integer.

41. A communications apparatus comprising at least one processor configured to perform the method of any of claims 1-20.

42. A computer-readable medium, comprising a computer program which, when run on a computer, causes the computer to perform the method of any one of claims 1 to 20.