CN111464473A

CN111464473A - Method and device for configuring information

Info

Publication number: CN111464473A
Application number: CN201910048123.5A
Authority: CN
Inventors: 管鹏; 杨小波; 王宇舟; 顾浙骐
Original assignee: Chengdu Huawei Technology Co Ltd
Current assignee: Chengdu Huawei Technology Co Ltd
Priority date: 2019-01-18
Filing date: 2019-01-18
Publication date: 2020-07-28
Anticipated expiration: 2039-01-18
Also published as: CN111464473B; WO2020147596A1

Abstract

The application provides a method for configuring information, which comprises configuring and transmitting TRS group information of a tracking reference signal, wherein the TRS group information comprises an index of a TRS group, an index of a first TRS and an index of a second TRS, and the first TRS and the second TRS belong to the same TRS group; and transmitting the first TRS and the second TRS so that the terminal equipment performs symbol timing synchronization according to the TRS group. The technical scheme provided by the application can solve the following technical problems: the TRS time offset measurement range using the wide beam transmission is insufficient as a result of symbol timing synchronization of other physical channels transmitted on the narrow beam, such as PDCCH, PDSCH or other signals.

Description

Method and device for configuring information

Technical Field

The present application relates to the field of communications, and in particular, to a method and apparatus for configuring information.

Background

To facilitate understanding of the technical background of the present application, the following symbol timing synchronization is first introduced.

In a multi-carrier system, the receiving end is sensitive to errors in time synchronization and frequency domain synchronization. The receiving end needs precise time synchronization and frequency domain synchronization, otherwise intersymbol interference or intercarrier interference is caused, and the system performance is affected. Time synchronization can be further divided into symbol timing synchronization (which can also be referred to as timing estimation, or time offset estimation) and sampling clock synchronization. The present application relates generally to symbol timing synchronization.

Symbol timing synchronization, i.e., determining the starting position of an Orthogonal Frequency Division Multiplexing (OFDM) symbol, i.e., the position of each Fast Fourier Transform (FFT) window. Symbol timing synchronization includes two things, determining a timing reference point and a timing measurement range.

Timing reference point: a reference position for symbol timing synchronization is determined. In the prior art, various algorithms for determining the timing reference point exist, and specific reference can be made to the algorithms exemplified in the specification of the application.

Timing measurement range: after determining the timing reference point, reception is performed at the timing reference point with a timing measurement range.

The symbol timing synchronization scheme provided in the prior art cannot meet the requirement of a New air interface (New radio, NR), and a New timing synchronization solution is urgently needed.

Disclosure of Invention

The application provides a method for configuring information, which can solve the following technical problems: the TRS time offset measurement range using the wide beam transmission is insufficient to be used as a timing reference for other physical channels transmitted by the narrow beam, such as PDCCH, PDSCH or other signals.

In a first aspect, a method for configuring information is provided, including: configuring and transmitting Tracking Reference Signal (TRS) group information, wherein the TRS group comprises a first TRS and a second TRS; the TRS group information includes an index of a TRS group, and an index of a first TRS and an index of a second TRS; and transmitting the first TRS and the second TRS so that the terminal equipment performs symbol timing synchronization according to the TRS group.

According to the technical scheme provided by the application, the TRS groups are configured, each TRS group comprises at least two TRSs, so that the terminal equipment can obtain the TRS with higher frequency domain density, symbol timing synchronization is carried out based on the TRS with higher density, a larger timing measurement range can be obtained, when the terminal equipment uses the wide beam to transmit the TRS, a sufficient timing measurement range can be obtained, and the TRS transmitted by the wide beam can be used as a timing reference of a physical channel transmitted by the narrow beam.

In one possible design, the TRS group further includes indication information for indicating whether the terminal device needs to perform symbol timing synchronization with the first TRS and the second TRS in combination.

In another possible design, the method further includes: and receiving capability information reported by the terminal equipment, wherein the capability information comprises the frequency domain density of the TRS supported by the terminal equipment or the frequency domain density of the TRS required by the terminal equipment.

In another possible design, the capability information further includes a maximum timing measurement range supported by the terminal device or a timing measurement range required by the terminal device.

In another possible design, the capability information further includes whether the terminal device supports symbol timing synchronization with multiple TRSs.

In another possible design, the method further includes sending QC L indication information, where the QC L indication information is used to indicate that the first TRS and the second TRS are QC L references of the PDSCH.

In another possible design, the QC L directive information is carried by a QC L-info data structure.

In another possible design, the QC L indicator is an index of the TRS group.

In another possible design, the sending the first TRS and the second TRS specifically includes: and the first TRS and the second TRS are carried on the same orthogonal frequency division multiplexing OFDM symbol for transmission.

In another possible design, the method further includes: and sending a Physical Downlink Shared Channel (PDSCH).

In a second aspect, an apparatus is provided, comprising:

a processing unit configured to configure tracking reference signal TRS group information, the TRS group including a first TRS and a TRS; the TRS group information includes an index of a TRS group, and an index of a first TRS and an index of a second TRS;

and a sending unit, configured to send the TRS group information and send the first TRS and the second TRS, so that the terminal device performs symbol timing synchronization according to the TRS group.

In another possible design, the apparatus further includes a receiving unit, configured to receive capability information reported by the terminal device, where the capability information includes a frequency domain density of a TRS supported by the terminal device or a frequency domain density of a TRS required by the terminal device.

In another possible design, the processing unit is further configured to configure QC L indication information, and the QC L indication information is used to indicate that the first TRS and the second TRS are QC L references of a PDSCH (physical downlink shared channel).

In another possible design, the QC L indicator is an index of the TRS group.

In another possible design, the transmitting unit is further configured to transmit the first TRS and the second TRS through one OFDM symbol.

In another possible design, the sending unit is further configured to send a physical downlink shared channel PDSCH.

In a third aspect, a method for configuring information is provided, including: receiving Tracking Reference Signal (TRS) group information, wherein the TRS group comprises a first TRS and a second TRS; the TRS group information includes an index of the TRS group and an index of a first TRS and an index of a second TRS; receiving a first TRS and a second TRS sent by the network equipment; performing symbol timing synchronization based on the first TRS and the second TRS.

In one possible design, the TRS group further includes indication information indicating whether symbol timing synchronization needs to be performed in conjunction with the first TRS and the second TRS.

In another possible design, the method further includes: and reporting capability information, wherein the capability information comprises the frequency domain density of the TRS supported by the terminal equipment.

In another possible design, the capability information further includes a maximum timing measurement range supported by the terminal device. In another possible design of the device according to the invention,

In another possible design, the method further includes receiving QC L indication information from the network device, where the QC L indication information is used to indicate that the first TRS and the second TRS are QC L references of the PDSCH.

In another possible design, the QC L indicator is an index of the TRS group.

In another possible design, the performing symbol timing synchronization based on the first TRS and the second TRS specifically includes: determining a reference point for timing estimation; determining a timing measurement range based on the frequency domain densities of the first and second TRSs; and obtaining a symbol timing synchronization result based on the reference point of the timing estimation and the timing measurement range.

In another possible design, the method further includes: and receiving a Physical Downlink Shared Channel (PDSCH) based on the result of the symbol timing synchronization.

In a fourth aspect, an apparatus is provided that includes: a receiving unit, configured to receive tracking reference signal TRS group information, where the TRS group includes a first TRS and a second TRS, and the TRS group information includes an index of the TRS group and an index of the first TRS and an index of the second TRS; and a first TRS and a second TRS for receiving the signal sent by the network device; a processing unit, configured to perform symbol timing synchronization based on the first TRS and the second TRS.

In another possible design, the ue further includes a sending unit, configured to report capability information, where the capability information includes a frequency domain density of a TRS supported by the terminal device.

In another possible design, the capability information further includes a maximum timing measurement range supported by the terminal device.

In another possible design, the receiving unit is further configured to receive QC L indication information from the network device, where the QC L indication information is used to indicate that the first TRS and the second TRS are QC L references of a PDSCH (physical downlink shared channel).

In another possible design, the QC L indicator is an index of the TRS group.

In another possible design, the receiving unit is configured to receive the first TRS and the second TRS through a same OFDM symbol.

In another possible design, the processing unit is specifically configured to: determining a reference point for timing estimation; determining a timing measurement range based on the frequency domain densities of the first and second TRSs; and obtaining a symbol timing synchronization result based on the reference point of the timing estimation and the timing measurement range.

In another possible design, the receiving unit is configured to receive a PDSCH based on the result of the symbol timing synchronization.

In a fifth aspect, a method for configuring information is provided, the method comprising: transmitting a first tracking reference signal TRS; transmitting second TRS configuration information, wherein the second TRS configuration information comprises a second TRS index and a first TRS index; and transmitting the second TRS so that the terminal equipment carries out symbol timing synchronization based on the first TRS and the second TRS.

According to the technical scheme, the additional TRS is configured, symbol timing synchronization is carried out on the basis of the additional TRS and the first TRS, a large timing measurement range can be obtained, when the terminal device uses the wide-beam transmission TRS, a sufficient timing measurement range can be obtained, and therefore the TRS transmitted by the wide beam can be used as a timing reference of a physical channel transmitted by the narrow beam.

In one possible design, the method further includes transmitting QC L indication information, where the QC L indication information is used to indicate that the first TRS and the second TRS are QC L references of the PDSCH.

In another possible design, the QC L indication information is an index of the first TRS or an index of the second TRS.

In another possible design, the second TRS configuration information further includes: the third TRS index.

In another possible design, the method further includes: transmitting an activation signaling indicating that the second TRS is used in symbol timing synchronization in combination with the first TRS; and/or the activation signaling is used for indicating that the second TRS and a third TRS are jointly used for symbol timing synchronization.

In another possible design, the method further includes: sending a configuration message, where the configuration message is used to indicate a duration of the symbol timing synchronization used by the second TRS and the first TRS in combination; or the configuration message is used to indicate a duration that the second TRS and the third TRS are jointly used for symbol timing synchronization.

In another possible design, the method further includes: and receiving capability information reported by the terminal equipment, wherein the capability information comprises the frequency domain density of the TRS required by the terminal equipment or the maximum supported frequency domain density of the TRS.

In another possible design, the method further includes: and receiving a request message of the terminal equipment, wherein the request message is used for requesting the network equipment to send a second TRS.

In a sixth aspect, there is also provided an apparatus comprising: a transmission unit configured to transmit a first tracking reference signal TRS; a processing unit, configured to configure second TRS configuration information, where the second TRS configuration information includes a second TRS index and a first TRS index; the sending unit is further configured to send the second TRS configuration information and send the second TRS, so that the terminal device performs symbol timing synchronization based on the first TRS and the second TRS.

In a possible design, the transmitting unit is further configured to transmit QC L indication information, and the QC L indication information is used to indicate that the first TRS and the second TRS are QC L references of a PDSCH (physical downlink shared channel).

In another possible design, the sending unit is further configured to send an activation signaling, where the activation signaling is used to indicate that the second TRS is used in symbol timing synchronization in combination with the first TRS; and/or the activation signaling is used for indicating that the second TRS and a third TRS are jointly used for symbol timing synchronization.

In another possible design, the sending unit is further configured to send a configuration message, where the configuration message is used to indicate a duration that the second TRS and the first TRS are jointly used for symbol timing synchronization; or the configuration message is used to indicate a duration that the second TRS and the third TRS are jointly used for symbol timing synchronization.

In another possible design, the ue further includes a receiving unit, configured to receive capability information reported by the terminal device, where the capability information includes a frequency domain density of a TRS required by the terminal device or a frequency domain density of a maximum TRS supported by the terminal device.

In another possible design, the receiving unit is further configured to receive a request message of the terminal device, where the request message is used to request to send the second TRS.

In a seventh aspect, a method for configuring information is provided, including: receiving a first Tracking Reference Signal (TRS), and receiving second TRS configuration information, wherein the second TRS configuration information comprises a second TRS index and a first TRS index; receiving a second TRS; performing symbol timing synchronization based on the first TRS and the second TRS.

In one possible design, the method further includes receiving QC L indication information, where the QC L indication information is used to indicate that the first TRS and the second TRS are QC L references of a PDSCH (physical downlink shared channel).

In another possible design, the method further includes: receiving activation signaling indicating that the second TRS is used in conjunction with the first TRS for symbol timing synchronization; and/or the activation signaling is used for indicating that the second TRS and a third TRS are jointly used for symbol timing synchronization.

In another possible design, the method further includes: receiving a configuration message, where the configuration message is used to indicate a duration that the second TRS and the first TRS are jointly used for symbol timing synchronization; or the configuration message is used to indicate a duration that the second TRS and the third TRS are jointly used for symbol timing synchronization.

In another possible design, the method further includes: and reporting capability information, wherein the capability information is used for indicating the frequency domain density of the TRS required by the terminal equipment or the frequency domain density of the supported maximum TRS.

In another possible design, the method further includes: and sending a request message for requesting the network device to send the second TRS.

In an eighth aspect, there is also provided an apparatus comprising: a receiving unit, configured to receive a first tracking reference signal TRS, and receive second TRS configuration information, where the second TRS configuration information includes a second TRS index and a first TRS index; receiving a second TRS; a processing unit, configured to perform symbol timing synchronization based on the first TRS and the second TRS.

In one possible design, the receiving unit is further configured to receive QC L indication information, where the QC L indication information is used to indicate that the first TRS and the second TRS are QC L references of a PDSCH (physical downlink shared channel).

In another possible design, the receiving unit is further configured to receive an activation signaling, where the activation signaling is used to indicate that the second TRS is used in symbol timing synchronization in combination with the first TRS; and/or the activation signaling is used for indicating that the second TRS and a third TRS are jointly used for symbol timing synchronization.

In another possible design, the receiving unit is further configured to receive a configuration message, where the configuration message is used to indicate a duration that the second TRS and the first TRS are jointly used for symbol timing synchronization; or the configuration message is used to indicate a duration that the second TRS and the third TRS are jointly used for symbol timing synchronization.

In another possible design, the processing unit is configured to determine a reference point for timing estimation; determining a timing measurement range based on the frequency domain densities of the first and second TRSs; and obtaining a symbol timing synchronization result based on the reference point of the timing estimation and the timing measurement range.

In another possible design, the receiving unit is further configured to receive a PDSCH based on the result of the symbol timing synchronization.

In another possible design, the ue further includes a sending unit, configured to report capability information, where the capability information is used to indicate a frequency domain density of a TRS required by the terminal device or a frequency domain density of a maximum TRS supported by the terminal device, or send a request message, used to request the network device to send a second TRS.

A ninth aspect provides a communication device for performing the method of the first aspect or any of its possible implementations, or for performing the method of the third aspect or any of its possible implementations. Optionally, the communication device may include means for performing the method of the first aspect or any possible implementation manner of the first aspect, or include means for performing the method of the third aspect or any possible implementation manner of the third aspect.

A tenth aspect provides a communication device for performing the method of the fifth aspect or any possible implementation manner of the fifth aspect, or for performing the method of the seventh aspect or any possible implementation manner of the seventh aspect. Optionally, the communication device may include means for performing the method of the fifth aspect or any possible implementation manner of the fifth aspect, or include means for performing the method of the seventh aspect or any possible implementation manner of the seventh aspect.

In an eleventh aspect, a communication device is provided, which comprises a memory for storing instructions and a processor for executing the instructions stored by the memory, and execution of the instructions stored in the memory causes the processor to perform the method of the first aspect or any possible implementation manner of the first aspect, or to perform the method of the third aspect or any possible implementation manner of the third aspect.

In a twelfth aspect, a communication device is provided, which comprises a memory for storing instructions and a processor for executing the instructions stored by the memory, and execution of the instructions stored in the memory causes the processor to perform the method of the fifth aspect or any of its possible implementations, or to perform the method of the seventh aspect or any of its possible implementations.

In a thirteenth aspect, a chip is provided, where the chip includes a processing module and a communication interface, where the processing module is configured to control the communication interface to communicate with the outside, and the processing module is further configured to implement the first aspect or the method in any possible implementation manner of the first aspect, or to implement the method in any possible implementation manner of the third aspect or the third aspect.

In a fourteenth aspect, a chip is provided, where the chip includes a processing module and a communication interface, where the processing module is configured to control the communication interface to communicate with the outside, and the processing module is further configured to implement the method in the fifth aspect or any possible implementation manner of the fifth aspect, or to implement the method in any possible implementation manner of the seventh aspect or the seventh aspect.

A fifteenth aspect provides a computer readable storage medium having stored thereon a computer program which, when executed by a computer, causes the computer to implement the method of the first aspect or any of its possible implementations, or causes the computer to implement the method of the third aspect or any of its possible implementations.

A sixteenth aspect provides a computer readable storage medium having stored thereon a computer program which, when executed by a computer, causes the computer to carry out the method of the fifth aspect or any of its possible implementations, or causes the computer to carry out the method of the seventh aspect or any of its possible implementations.

A seventeenth aspect provides a computer program product comprising instructions that, when executed by a computer, cause the computer to implement the first aspect or the method in any of the possible implementations of the first aspect, or cause the computer to implement the method in any of the possible implementations of the third aspect.

An eighteenth aspect provides a computer program product comprising instructions which, when executed by a computer, cause the computer to carry out the method of the fifth aspect or any of its possible implementations, or cause the computer to carry out the method of the seventh aspect or any of its possible implementations.

Drawings

FIG. 1 is a schematic diagram of a network architecture provided herein;

FIG. 2A is a diagram illustrating symbol timing synchronization;

fig. 2B is a schematic diagram of a TRS according to a second prior art;

fig. 3 is an interaction diagram of a method for configuring information according to an embodiment of the present application;

fig. 4 is a schematic diagram of a TRS time-frequency location provided in an embodiment of the present application;

fig. 5 is an interaction diagram of a method for configuring information according to an embodiment of the present application;

fig. 6 is an interaction diagram of a method for configuring information according to an embodiment of the present application;

fig. 7A is a schematic diagram of a time-frequency position of a TRS according to an embodiment of the present application;

fig. 7B is a schematic diagram of a time-frequency position of another TRS according to 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;

fig. 9 is a schematic structural diagram of another network device according to an embodiment of the present application;

fig. 10 is a schematic structural diagram of a terminal device according to an embodiment of the present application;

fig. 11 is a schematic structural diagram of another terminal device provided in the embodiment of the present application;

FIG. 12 is a schematic structural diagram of an apparatus according to an embodiment of the present disclosure;

fig. 13 is a schematic structural diagram of another apparatus according to an embodiment of the present disclosure.

Detailed Description

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

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

In the description of this application, "/" means "or" unless otherwise stated, for example, A/B may mean A or B. "and/or" herein is merely an association describing an associated object, and means 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. Further, "at least one" means one or more, "a plurality" means two or more. The terms "first", "second", and the like do not necessarily limit the number and execution order, and the terms "first", "second", and the like do not necessarily limit the difference.

It is noted that, in the present application, words such as "exemplary" or "for example" are used to mean exemplary, illustrative, or descriptive. Any embodiment or design described herein as "exemplary" or "e.g.," is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.

In the description of the present application, "indication" may include direct indication and indirect indication, and may also include explicit indication and implicit indication. If information indicated by certain information (such as indication information described below) is referred to as information to be indicated, there are many ways of indicating the information to be indicated in a specific implementation process. For example, the information to be indicated may be directly indicated, wherein the information to be indicated itself or an index of the information to be indicated, and the like. For another example, the information to be indicated may also be indirectly indicated by indicating other information, where the other information and the information to be indicated have an association relationship. For another example, only a part of the information to be indicated may be indicated, while the other part of the information to be indicated is known or predetermined. In addition, the indication of the specific information can be realized by means of the arrangement order of each information agreed in advance (for example, specified by a protocol), so that the indication overhead can be reduced to a certain extent.

The information to be indicated may be sent together as a whole, or may be sent separately by dividing into a plurality of pieces of sub information, and the sending periods and/or sending timings of these pieces of sub information may be the same or different. Specific transmission method this application is not limited. The sending period and/or sending timing of the sub information may be predefined, for example, predefined according to a protocol, or may be configured by the transmitting end device by sending configuration information to the receiving end device. Wherein, the configuration information may include, for example and without limitation, one or a combination of at least two of RRC signaling, MAC signaling, and DCI.

The technical solution provided in the embodiments of the present application may be applied to various communication systems, for example, a long term evolution (L TE) communication system, an NR communication system adopting a 5G communication technology, a future evolution system or a plurality of communication fusion systems, and the like.

It can be understood that the network architecture and the service scenario described in the embodiment of the present application are for more clearly illustrating the technical solution of the embodiment of the present application, and do not form a limitation on the technical solution provided in the embodiment of the present application, and it can be known by a person skilled in the art that the technical solution provided in the embodiment of the present application is also applicable to similar technical problems along with the evolution of the network architecture and the appearance of a new service scenario.

The embodiments of the present application may be applied to a beam-based multi-carrier communication system, for example, a 5G system or a New Radio (NR) system.

Fig. 1 is a schematic diagram of a communication system 100 according to an embodiment of the present invention, where the communication system 100 includes a network device 110 and a plurality of terminal devices 120 (the network device 110 may transmit a plurality of analog beams simultaneously through a plurality of radio frequency channels to transmit data for the plurality of terminal devices), as shown in fig. 1, the network device simultaneously transmits beams 1 to 4, where the beams 1 to 4 are used for transmitting data for the terminal device 120a, and the beams 1 to 4 may be referred to as service beams of the terminal device 120 a. the network device 110 may be a base station or a base station controller of wireless communication, for example, the base station may include various types of base stations, such as a micro base station (also referred to as a small station), a macro base station, a relay station, an access Point, a Transmission and Reception Point (TRP), etc., which is not specifically limited in this embodiment, the base station may be a global system for mobile communication, a code division multiple access Point (IoT) or a mobile base station of a wireless communication, such as a mobile node B, or a mobile node B, or a mobile node B, a mobile.

Terminal device 120 is used to provide voice and/or data connectivity services to a user. The terminal equipment 10 may be referred to by different names, such as User Equipment (UE), access terminal, terminal unit, terminal station, mobile station, remote terminal, mobile device, wireless communication device, terminal agent, or terminal device. Optionally, the terminal device 10 may be various handheld devices, vehicle-mounted devices, wearable devices, and computers with communication functions, which is not limited in this embodiment of the present application. For example, the handheld device may be a smartphone. The in-vehicle device may be an in-vehicle navigation system. The wearable device may be a smart band, or a Virtual Reality (VR) device. The computer may be a Personal Digital Assistant (PDA) computer, a tablet computer, and a laptop computer.

In the prior art, the network device transmits the TRS through the beam 1 to the beam 4, and the terminal device performs symbol timing synchronization according to the received TRS.

As shown in fig. 2A, in the 5G new air interface, the symbol timing synchronization process is as follows: the network device transmits a reference signal, and the terminal device performs symbol timing synchronization according to the received reference signal, determines a reference point and a timing measurement range, and receives a data Channel, such as a Physical Downlink Control Channel (PDCCH) or a Physical Downlink Shared Channel (PDSCH), with the reference point as a center and the timing measurement range as a sampling radius. In particular, R15 defines a Tracking Reference Signal (TRS) that can be used by the terminal device for symbol timing synchronization.

One of the prior art provides a technical solution that can be used for symbol timing synchronization. The network device needs to transmit a TRS towards each beam to assist the terminal devices within the coverage of that beam in symbol timing synchronization. The disadvantage of this approach is that the overhead is large. Since the overhead of the TRS is proportional to the number of beams transmitted by the network device, the number of beams may be tens or even hundreds in a high frequency scenario, resulting in excessive TRS overhead.

In order to reduce the TRS overhead of the first prior art, as shown in fig. 2B, the second prior art provides a solution to transmit the TRS using a wide beam and transmit a data channel, such as a PDCCH, a PDSCH, or other signals, using a narrow beam. In this way, the network device need not transmit the TRS in each narrow beam direction. Illustratively, in fig. 2B, the coverage of one wide beam may be equivalent to 4 narrow beams, and the overhead of TRS in prior art two is 1/4 of TRS overhead in prior art one.

The second prior art also has disadvantages. The difference between the propagation paths of the TRS for wide beam transmission and the PDCCH, PDSCH or other signals for narrow beam transmission is large, so that when the TRS for wide beam transmission is used for symbol timing synchronization, the PDCCH or PDSCH may not be received when the PDCCH or PDSCH is received as the estimated result. The reason is as follows: the prior art provides an algorithm for timing the measurement range, as follows:

timing measurement range + -1/2 FFT points/(frequency domain resource number/frequency domain density) [ Ts ]

The frequency domain resource number represents the number of Resource Elements (REs) contained in each Resource Block (RB), each RB is specified to contain 12 REs in the R15 protocol, the frequency domain density represents the number of REs occupied by each port in each RB, and the frequency domain density of TRS specified in the R15 protocol is 3. The unit of the timing measurement range is sampling time Ts, and the Ts is 1/(subcarrier interval FFT points)

Illustratively, when the subcarrier spacing is 60kHz and the number of FFT points is 2048 points, the timing measurement range of TRS is ± 256Ts according to the above formula. However, the timing difference between the TRS transmitted by the wide beam and the target signal transmitted by the narrow beam can reach more than 300Ts through actual measurement. That is, when the wide beam transmission TRS is used, the obtained symbol timing synchronization result cannot be used for the data channel, and the receiver cannot correctly determine the start point of the symbol time of the target signal, which may cause the target signal reception performance to be degraded or even impossible to receive.

Therefore, the technical problem to be solved by the present invention is that the TRS timing measurement range using the wide beam transmission is insufficient and cannot be used as a reference for symbol timing synchronization of a physical channel or signal transmitted by another narrow beam.

According to the above formula, in order to expand the TRS timing measurement range, for example, to make the TRS timing measurement range reach 300Ts or more, the main methods are to adjust the frequency domain density of the reference signal, the FFT point number of the receiver, the subcarrier spacing, and the like. The core idea of the invention is to construct a timing reference signal with a greater density of frequency domains. One of the simplest solutions is to directly increase the frequency domain density of the existing TRS, e.g. from 3 to 4, 6, etc. However, introducing a higher frequency domain density of reference signals in the standard requires a cumbersome standardization effort. The method of the present invention does not require a new definition of a higher density reference signal.

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 below.

In order to facilitate understanding of the embodiments of the present application, some terms related to the embodiments of the present application will be briefly described below.

1. Wave beam

The representation of the beam in the New Radio (NR) protocol may be a spatial domain filter, or referred to as a spatial filter or a spatial parameter. A beam for transmitting a signal may be referred to as a transmission beam (Tx beam), may be referred to as a spatial domain transmission filter (spatial domain transmission filter), or a spatial transmission parameter (spatial transmission parameter); the beam used for receiving the signal may be referred to as a reception beam (Rx beam), may be referred to as a spatial domain receive filter (spatial domain receive filter), or a spatial Rx parameter (spatial Rx parameter).

The transmit beam may refer to a distribution of signal strengths formed in different spatial directions after the signal is transmitted through the antenna, and the receive beam may refer to a distribution of signal strengths of the wireless signal received from the antenna in different spatial directions.

It should be understood that the embodiment of the NR protocol listed above for the beams is only an example and should not constitute any limitation to the present application. This application does not exclude the possibility that other terms may be defined in future protocols to have the same or similar meaning.

Further, the beam may be a wide beam, or a narrow beam, or other type of beam. The technique of forming the beam may be a beamforming technique or other technique. The beamforming technology may specifically be a digital beamforming technology, an analog beamforming technology, or a hybrid digital/analog beamforming technology. Different beams may be considered different resources. The same information or different information may be transmitted through different beams.

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

In the embodiment of the present application, a beam refers to a transmission beam of a network device, unless otherwise specified. In beam measurement, each beam of the network device corresponds to one resource, so that the beam corresponding to the resource can be uniquely identified by the index of the resource.

2. Resource(s)

In the embodiment of the present application, the resource refers to a resource used for transmitting a downlink signal.

In this application, the downlink signal is a TRS.

It should be noted that the resource of the downlink signal is a data structure, and includes a plurality of sub-parameters, which are used to encapsulate related information of the downlink signal, such as a type of the downlink signal, a Resource Element (RE) carrying the downlink signal, a transmission time and a transmission period of the downlink signal, a number of ports used for transmitting the downlink signal, and the like. The resource of each downlink signal has a unique index to identify the resource of the downlink signal. It is to be understood that the index of the resource may also be referred to as an identifier of the resource, and the embodiment of the present application does not limit this.

3. Quasi co-location (quasi-co-location, QC L)

For example, if two antenna ports have a co-location relationship, then the large-scale characteristics of a channel transmitting a symbol at one port can be deduced from the large-scale characteristics of a channel transmitting a symbol at another port.

Spatial QC L, spatial QC L may be considered as a type of QC L, it is understood that there are two angles for spatial, from the transmitting end or from the receiving end, from the transmitting end, if two antenna ports are spatially quasi co-located, it means that the corresponding beam directions of the two antenna ports are spatially identical, i.e., the spatial filters are identical, from the receiving end, if two antenna ports are spatially quasi co-located, it means that the receiving end can receive signals transmitted by the two antenna ports in the same beam direction, i.e., with respect to the spatial reception parameter QC L.

4. Determining a reference point

Symbol timing synchronization includes determining a reference point (which may also be referred to as timing estimation or determining a timing point or estimating a timing point) and a timing measurement range, which are used together for a terminal device to determine a starting position of a symbol when receiving a downlink signal.

Timing estimation is used to determine a reference position or reference point,

the timing measurement range is used for receiving the downlink signal by shifting sampling points obtained by the timing measurement range back and forth by taking the reference position or the reference point as a center.

Illustratively, the present application provides an algorithm for determining a reference point, as follows:

assuming perfect time synchronization, in an OFDM system, the time domain of the receiver samples (samples) is represented as

Where N is the number of IFFT/FFT points, Nu is the number of subcarriers, Ng is the number of guard samples (guard samples), c_nIs a modulated QPSK or QAM symbol, v is a normalized carrier frequency offset value, and n (k) is noise.

If the time offset is considered to be l, then the received samples are:

r(k)＝x(k-l)

one maximum likelihood estimator is:

wherein L is N/2.

The point in time when the maximum likelihood is maximum, i.e. the value of d for which m (d) is maximized, is the determined reference point.

The above method finds the time point of the maximum likelihood value by using a sequence correlation method, and the above method can be used for directly measuring the reference signal and can also be used for a scene in which the correlation is performed by using a pre-stored sequence.

It should be understood that there are many other algorithms for determining reference points in the prior art, and the reference point determining algorithm is not limited in this application.

5. Timing measurement range

The timing measurement range is centered on the starting position of the symbol determined in the timing estimation, and the timing measurement range is taken as a radius, and signals are detected before and after the starting position of the symbol.

Illustratively, the prior art provides a formula for calculating the timing measurement range, as follows:

the timing measurement range is related to factors such as frequency domain density of reference signals, FFT point number of receiver fast Fourier transform, subcarrier spacing and the like. For example, one timing measurement range is formulated as follows:

The frequency domain resource number is the number of resource units (REs) of each Resource Block (RB), the frequency domain density is the number of REs occupied by each port in each RB, and Ts is 1/(subcarrier spacing FFT point number). The unit of the timing measurement range is a sampling time Ts.

Illustratively, the number of frequency domain resources is 15, the frequency domain density is 3, the subcarrier spacing is 60kHz, the number of FFT points is 2048 points, and the timing measurement range of TRS is ± 256Ts as can be derived from the above formula.

Currently, a standard embodiment of a TRS is a set of channel state information reference signals (CSI-RSresource sets). That is, the CSI-RS resource set is used to indicate TRS. For example, TRS1 is denoted as CSI-RS resource set 1, and TRS2 is denoted as CSI-RS resource set 2. Each of the CSI-RS resources in this CSI-RS resource set is a single port, and the frequency domain density is 3 (frequency domain density is defined as the number of REs occupied by each port in each RB). The standard also specifies the specific time domain location of the TRS, e.g., two OFDM symbols in one slot, or 4 OFDM symbols in two slots. Wherein one OFDM symbol transmits one CSI-RS resource.

Fig. 3 is a schematic interaction flow diagram of a method 300 for measurement indication provided by an embodiment of the application. The method 300 includes the following steps.

And S320, the network equipment configures TRS group information and sends the TRS group information.

The TRS group information includes a TRS group index and indexes of a plurality of TRSs included in the TRS group. The plurality of TRSs means 2 or more TRSs.

Optionally, the TRS group information further includes indication information (joint timing indication in the following example) for indicating whether the terminal device needs to perform symbol timing synchronization on the plurality of TRSs in the joint TRS group. For example, when the joint timing indication is "on", the terminal device should perform symbol timing synchronization in combination with the first TRS and the second TRS; when the joint timing indication is "off", the terminal device may not perform symbol timing synchronization in conjunction with the first TRS and the second TRS.

Illustratively, the data structure of the network device configuration TRS group is as follows:

the TRS group in the above example includes two TRSs, TRS #1 and TRS #2, where TRS #1ID is an index of a first TRS and TRS #2ID is an index of a second TRS. It should be understood that the two TRSs are merely examples, and that the set of TRSs may include other TRSs. Therein, the index of the TRS may be identified by a resource set ID, such as nzp-CSI-ResourceSet ID, for example:

s330, the network device sends a plurality of TRSs included in the TRS group.

As shown in fig. 4, the multiple TRSs may be carried on the same OFDM symbol for transmission. Taking an example in which one TRS group includes two TRSs in fig. 4, when two TRSs are carried and transmitted on different frequency domains of the same OFDM symbol, so that in the technical essence, it is equivalent to the network device transmitting one TRS with a denser frequency domain, so that the value of the final timing measurement range is increased, the receiver of the terminal device may apply the result of symbol timing estimation of the TRS with a wide beam to a data channel or other signals.

Optionally, the TRSs may be carried on different OFDM symbols for transmission. For example, the plurality of TRSs are transmitted on adjacent OFDM symbols. For another example, the TRSs may transmit in a time range, and the size of the range may be configured by a network, or the terminal may request the network to configure.

Optionally, the plurality of TRSs are transmitted using the same beam.

And S340, the terminal equipment performs symbol timing synchronization based on the plurality of TRSs.

Those skilled in the art will appreciate that symbol timing synchronization based on two TRSs requires a reference point to be determined before the timing measurement range is determined. For the algorithm for determining the reference point, please refer to the method described above, which is not described herein again. In the timing measurement range formula, when the timing measurement range calculation is performed according to two TRSs, the two TRSs can be regarded as one TRS with a higher frequency domain density. For example, taking fig. 4 as an example, fig. 4 transmits two TRSs with a frequency domain density of 3, and for the terminal device, it is equivalent to receive one TRS with a frequency domain density of 6.

According to the formula of the timing measurement range, the timing measurement range is +/-1/2 FFT points/(frequency domain resource number/frequency domain density) [ Ts ], and when the frequency domain density is doubled, the value of the timing measurement range is doubled.

Illustratively, the number of frequency domain resources is 12, the frequency domain density is 6 (since two TRSs with a frequency domain density of 3 are transmitted on one OFDM symbol, which is equivalent to transmitting one TRS with a frequency domain density of 6), the subcarrier spacing is 60kHz, the number of FFT points is 2048, the timing measurement range of TRS can be ± 512Ts by the above formula, and is greater than the range where the timing difference between the wide beam transmission TRS and the narrow beam transmission target signal is greater than 300Ts, and the target signal can be correctly received.

Optionally, the method further comprises:

and S310, the terminal equipment reports the capability information. The capability information includes, but is not limited to: the required reference signal frequency domain density, or the maximum supported reference signal frequency domain density, the required timing measurement range, or the maximum supported timing measurement range, whether or not joint multiple TRS acquisition timing measurement ranges are supported, e.g., supported, unsupported, or partially supported. If so, reporting the maximum number of TRSs supported by the terminal equipment.

Further, the method further comprises:

optionally, S350, the network device configures a plurality of TRSs in the TRS group as QC L reference of PDCCH or PDSCH, and transmits the symbol timing synchronization information obtained by the terminal device according to the TRSs.

Specifically, the data structure QC L-info includes cell information, bandwidth part ID, associated TRS group index, and QC L type.

Illustratively, the QC L reference configuring a plurality of TRSs in the TRS group as PDCCH or PDSCH is as follows (the parenthesis is a chinese paraphrase for english notation):

wherein, the reference signal included in the QC L-info data structure takes the value of TRS group index, and the parameter is used to indicate which TRS group the obtained symbol timing synchronization information can be used to receive PDSCH or PDCCH or other downlink data.

The above example shows that the symbol timing synchronization information obtained based on the plurality of TRSs included in the TRS group with the TRS group index of 1 may be used to receive the PDSCH, the PDCCH, or other downlink data.

Optionally, S360, the network device sends a physical channel or other downlink data. The physical channel may be a PDCCH or a PDSCH. The other downlink data may be a synchronization signal/Physical broadcast Channel (SS/PBCH) block, a reference signal, or other downlink signals.

Optionally, S370, receives the physical channel or other downlink data sent by the network device in S350 step, based on the symbol synchronization timing result obtained in S340 step.

The embodiment provided by the application does not need to define a reference signal with larger frequency domain density in the standard, saves fussy standardization work, only needs to configure the TRS in a group form for symbol timing synchronization, and is relatively simple.

Fig. 5 is a schematic interaction flow diagram of another method 500 for measurement indication provided by an embodiment of the application. The method 500 includes the following steps.

Optionally, S510, the terminal device reports the capability. Such capabilities include, but are not limited to: the required reference signal frequency domain density, or the maximum supported reference signal frequency domain density, the required timing measurement range, or the maximum supported timing measurement range, whether or not joint multiple TRS acquisition timing measurement ranges are supported, e.g., supported, unsupported, or partially supported. If so, reporting the maximum number of TRSs supported by the terminal equipment.

S520, the network device transmits the first TRS.

Wherein the index of the first reference signal is identified with nzp-CSI-ResourceSet Id.

S530, the network device configures the second TRS information.

There are many possible ways for the network device to configure the second TRS information. For example, the following method one is adopted: the second TRS information includes index information of the second TRS and index information of the first TRS. The second TRS information indicates that the second TRS and the first TRS are commonly used for symbol timing synchronization.

Illustratively, the TRS information is configured as follows:

for example, the network device configures the second TRS in the following manner two:

s530, the network device configures second TRS information, where the second TRS information includes index information of the second TRS, and first TRS index information associated with the second TRS, and third TRS index information associated with the second TRS.

Illustratively, the TRS information is configured as follows:

the network device may configure the second TRS in an activated or deactivated manner to be used in conjunction with the first TRS for symbol timing synchronization. For example, the terminal device is notified by using the activation signaling to use the TRS #1 and TRS #2 combination for symbol timing synchronization, and the terminal device is notified by using the deactivation signaling not to use the TRS #2 and TRS #1 combination for symbol timing synchronization.

Similarly, the network device may also configure the second TRS and the third TRS in an activated or deactivated manner for symbol timing synchronization. For example, the terminal device is notified by using the activation signaling to use the TRS #2 and TRS #3 combination for symbol timing synchronization, and the terminal device is notified by using the deactivation signaling not to use the TRS #2 and TRS #3 combination for symbol timing synchronization.

Further, the network device may signal the terminal device through a Media Access Control-Control Element (MAC-CE). For example, 1 bit is used in MAC-CE signaling to identify activation or deactivation. When the bit is 1, activation is represented, and when the bit is 0, deactivation is represented. For example, the MAC-CE signaling includes 1 bit, and when the first bit is 1, it indicates that the second TRS and the first TRS are jointly used for symbol timing synchronization; when the bit is 0, it indicates that the second TRS is used in combination with the third TRS for symbol timing synchronization.

Optionally, the network device may also configure the validity time for the second TRS. For example, the second TRS is used for symbol timing synchronization in conjunction with the first TRS for X time units from the configured validity time by the network device. The X time units may be X slots, X OFDM symbols, X subframes, etc., where X is an integer greater than or equal to 1.

The manner in which the network device configures the validity time for the second TRS may be as follows:

for example, the network device sends a signaling, and the signaling carries the valid time.

For example, the network device configures the second TRS information, and adds a parameter of the validity time to the data structure TRS # 2.

Exemplarily, when the TRS #2 is configured, a new parameter, an effective time, is added, where the value of the parameter may be X time units, and the time units may be subframes, slots, and OFDM symbols:

the value of X may be predefined by a standard or may be configured by a network device. Illustratively, the value of X includes, but is not limited to, 10,20,40,80, 160. In addition, the value of X may be related to the subcarrier spacing.

The method further comprises the following steps:

and S540, configuring QC L indication information.

In step S530, when the network device configures the second TRS information in the first manner, the QC L indication information is used to indicate that the first TRS and the second TRS are QC L references of PDCCH, PDSCH, or other downlink data.

In step S530, when the network device configures the second TRS information in the second manner, the QC L indication information is used to indicate that the first TRS and the second TRS are QC L references of PDCCH, PDSCH, or other downlink data, or the QC L indication information is used to indicate that the second TRS and the third TRS are QC L references of PDCCH, PDSCH, or other downlink data.

Illustratively, TRS #1 is configured as QC L reference for PDCCH or PDSCH as follows (in parentheses, chinese definitions for english identifiers):

or,

the configuration is as follows (the Chinese meaning for English symbol is in parentheses):

or,

or,

alternatively, the following is configured (the Chinese meaning for English notation is in parentheses):

s550, the network device transmits a second TRS.

S560, when the network device sends the first TRS and the second TRS, the terminal device performs symbol timing synchronization according to the received first TRS and the received second TRS.

Those skilled in the art will appreciate that symbol timing synchronization based on two TRSs requires a reference point to be determined before the timing measurement range is determined. For the algorithm for determining the reference point, please refer to the method described above, which is not described herein again. In the timing measurement range formula, when the timing measurement range calculation is performed according to two TRSs, since the two TRSs are transmitted on the same OFDM symbol, the two TRSs can be regarded as one TRS with a higher frequency domain density. For example, as shown in fig. 4, the frequency domain densities of the first TRS and the second TRS in fig. 4 are both 3, and since the TRS is transmitted on the same OFDM symbol, the TRS with the frequency domain density of 6 is equivalent to one TRS.

Illustratively, the number of frequency domain resources is 12, the frequency domain density is 6 (since two TRSs are transmitted on one OFDM symbol, which is equivalent to transmitting one TRS with the frequency domain density of 6), the subcarrier spacing is 60kHz, the number of FFT points is 2048, it can be found by the above formula that the timing measurement range of the TRS is ± 512Ts, which is greater than the range where the timing difference between the wide beam transmission TRS and the narrow beam transmission target signal is greater than 300Ts, and the target signal can be correctly received.

S570, the network device sends the PDSCH or PDCCH or other downlink data.

S580, the terminal device receives the PDSCH, the PDCCH, or other downlink data based on the symbol timing synchronization result obtained in step S550.

In the embodiment provided by the application, a newly added TRS is added, and the newly added TRS and an originally configured TRS are commonly used for symbol timing synchronization, which is equivalent to a network device configured with a TRS with a large frequency domain density, so that a large timing measurement range is obtained, and a time offset result obtained by using a wide beam transmission TRS can also be used for timing estimation of a narrow beam transmission data channel.

Fig. 6 is a schematic interaction flow diagram of another method 600 for measurement indication provided by an embodiment of the application. The method 600 includes the following steps.

Optionally, S610, the terminal device receives the first TRS, and performs symbol timing synchronization based on the first TRS.

Optionally, S620, the terminal determines that the symbol timing synchronization result obtained based on the first TRS does not meet a requirement.

S630, the terminal device sends a request message, where the request message is used to request the network device to send a second TRS.

And S640, the network equipment configures a second TRS and transmits the second TRS.

Optionally, the second TRS may be one TRS, or may be multiple TRSs.

Optionally, the second TRS and the first TRS are located in the same OFDM symbol in a time domain. Illustratively, such as shown in fig. 7A, a first TRS transmits on the 13 th OFDM symbol in one slot, and then the second TRS also transmits on the 13 th OFDM symbol in one slot, as shown in fig. 7B.

In this way, when the terminal side combines the first TRS and the second TRS to perform timing range measurement, it is equivalent to perform timing range measurement based on a greater frequency domain density of TRSs.

S650, network device configuration QC L indicates information, illustratively,

TRS #1 is configured as QC L reference for PDCCH or PDSCH as follows (in parentheses, chinese explanations for english notation):

consider TRS #1 as also referenced to QC L because TRS #1 is bound when TRS #2 is configured)

S660, the terminal device performs symbol timing synchronization with the second TRS based on the first TRS.

S670, the network device transmits the PDSCH or the PDCCH or other downlink data.

S680, the terminal device receives the PDSCH or PDCCH or other downlink data based on the symbol timing synchronization result obtained in S650.

The request message in S630 may be transmitted through signaling of an uplink channel, for example, Radio Resource Control (RRC) RRC, MAC-CE, Uplink Control Information (UCI), and the like.

The request message in step S630 may include at least one of the following:

whether the terminal device needs to track the reference signal, the number of the tracking reference signals needed by the terminal device, whether the terminal device needs additional tracking reference signals, the number of the additional tracking reference signals needed by the terminal device, whether the terminal device needs to deactivate the current tracking reference signal, which tracking reference signals need to be deactivated by the terminal device, indication information of insufficient timing measurement range, frequency domain density of the tracking reference signals needed by the terminal device, and time requirements of the required tracking reference signals, for example, the time requirements include periodic, semi-continuous and aperiodic. Optionally, the request message further includes a period time length if the required tracking reference signal is periodic, and the network device further needs to additionally indicate the number of times the tracking reference signal is transmitted if the required tracking reference signal is semi-persistent or aperiodic.

In the third embodiment, compared with the second embodiment, the process of the terminal device active request is added, and other steps may refer to the description of the second embodiment, which is not described herein again.

The various embodiments described herein may be implemented as stand-alone solutions or combined in accordance with inherent logic and are intended to fall within the scope of the present application.

It is to be understood that, in the above-described method embodiments, the method and the operation implemented by the terminal device may also be implemented by a component (e.g., a chip or a circuit) available for the terminal device, and the method and the operation implemented by the network device may also be implemented by a component (e.g., a chip or a circuit) available for the network device.

The method embodiments provided by the embodiments of the present application are described above, and the device embodiments provided by the embodiments of the present application are described below. It should be understood that the description of the apparatus embodiments corresponds to the description of the method embodiments, and therefore, for brevity, details are not repeated here, since the details that are not described in detail may be referred to the above method embodiments.

The above-mentioned scheme provided by the embodiment of the present application is introduced mainly from the perspective of interaction between network elements. It is to be understood that each network element, for example, a transmitting end device or a receiving end device. To implement the above functions, it includes hardware structures and/or software modules for performing the respective functions. Those of skill in the art would readily appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

In the embodiment of the present application, the functional modules may be divided according to the above method example for the transmitting end device or the receiving end device, for example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. It should be noted that, in the embodiment of the present application, the division of the module is schematic, and is only one logic function division, and there may be another division manner in actual implementation. The following description will be given taking the example of dividing each functional module corresponding to each function.

Fig. 8 is a schematic block diagram of a network device 800 according to an embodiment of the present application. The network device 800 may correspond to the network device in the above method embodiments. The network device 800 comprises the following elements:

a processing unit 810 configured to configure TRS group information, the TRS group including a first TRS and a second TRS; the TRS group information includes an index of a TRS group, and an index of a first TRS and an index of a second TRS;

a transmitting unit 820, configured to transmit the TRS group information and the first TRS and the second TRS.

Optionally, the TRS group information further includes indication information, where the indication information is used to indicate whether the terminal device needs to perform symbol timing synchronization by combining the first TRS and the second TRS.

Optionally, the terminal device 800 further includes a receiving unit 830, configured to receive capability information reported by the terminal device, where the capability information includes frequency domain density of TRSs supported by the terminal device or frequency domain density of TRSs required by the terminal device.

Optionally, the capability information further comprises at least one of:

the maximum timing measurement range supported by the terminal device or the timing measurement range required by the terminal device, and whether the terminal device supports symbol timing synchronization by combining a plurality of TRSs.

Further, the processing unit 810 is further configured to configure QC L indication information, where the QC L indication information is used to indicate that the first TRS and the second TRS are QC L references of PDSCH or PDCCH or other downlink data.

Optionally, the QC L directive information is carried via a QC L-info data structure.

Further, the QC L indicating information is an index of the TRS group.

Further, the transmitting unit 820 is further configured to transmit the first TRS and the second TRS through one OFDM symbol.

In another embodiment, the network device 800 includes the following elements:

a transmitting unit 820 for transmitting a first TRS;

a processing unit 810, configured to configure second TRS configuration information, where the second TRS configuration information includes a second TRS index and a first TRS index;

the sending unit 820 is further configured to send the second TRS configuration information and send the second TRS, so that the terminal device performs symbol timing synchronization based on the first TRS and the second TRS.

Further, the transmitting unit 820 is further configured to transmit QC L indication information, where the QC L indication information is used to indicate that the first TRS and the second TRS are QC L references of PDSCH, PDCCH, or other downlink data.

Optionally, the QC L indicating information is an index of the first TRS or an index of the second TRS.

Optionally, the sending unit 820 is further configured to send an activation signaling, where the activation signaling is used to indicate that the second TRS is used in symbol timing synchronization in combination with the first TRS; and/or the activation signaling is used for indicating that the second TRS and a third TRS are jointly used for symbol timing synchronization.

Optionally, the sending unit 820 is further configured to send a configuration message, where the configuration message is used to indicate a duration that the second TRS and the first TRS are jointly used for symbol timing synchronization; or the configuration message is used to indicate a duration that the second TRS and the third TRS are jointly used for symbol timing synchronization.

Optionally, the network device 800 further includes a receiving unit 830, configured to receive capability information reported by the terminal device, where the capability information includes a frequency domain density of a TRS required by the terminal device or a frequency domain density of a maximum TRS supported by the terminal device.

Optionally, the receiving unit 830 is further configured to receive a request message of the terminal device, where the request message is used to request to send the second TRS.

Optionally, the request message comprises at least one of:

the method includes the steps of obtaining indication information of insufficient timing measurement range, frequency domain density of tracking reference signals required by terminal equipment, whether the terminal equipment needs to track the reference signals, the number of the tracking reference signals required by the terminal equipment, whether the terminal equipment needs to additionally track the reference signals, the number of the additional tracking reference signals required by the terminal equipment, whether the terminal equipment needs to deactivate the current tracking reference signals, which tracking reference signals need to be deactivated by the terminal equipment, and the time requirement of the required tracking reference signals, for example, the time requirement includes periodicity, semi-persistence and non-periodicity. Optionally, the request message further includes a period time length if the required tracking reference signal is periodic, and the network device further needs to additionally indicate the number of times the tracking reference signal is transmitted if the required tracking reference signal is semi-persistent or aperiodic.

Fig. 9 is a schematic block diagram of a network device 900 according to an embodiment of the present application. The network device 900 may correspond to the network device in the above method embodiment, and may also correspond to the network device 800 in the above embodiment. As shown in fig. 9, the network device 900 includes a processor 910, a memory 920 and a transceiver 930, the memory 920 stores programs, the processor 910 is configured to execute the programs stored in the memory 920, and the execution of the programs stored in the memory 920 causes the processor 910 to perform the processing steps on the network device side in the above method embodiments, and the execution of the programs stored in the memory 920 causes the processor 910 to control the transceiver 930 to perform the receiving and transmitting steps on the network device side in the above method embodiments.

Therefore, according to the scheme provided by the application, the network device configures the terminal device with TRS groups, each of which includes at least two TRSs, so that the terminal device can obtain TRSs with a relatively high density of frequency domains, perform symbol timing synchronization based on the TRSs with the relatively high density, and can obtain a relatively large timing measurement range, so that when the terminal device uses a wide-beam transmission TRS, a sufficient timing measurement range can be obtained, and thus the TRS of the wide-beam transmission can be used as a timing reference of a physical channel of the narrow-beam transmission.

Fig. 10 is a schematic block diagram of a terminal device 1000 according to an embodiment of the present application. The terminal device 1000 may correspond to the terminal device in the above method embodiment. The terminal device 1000 includes the following units:

a receiving unit 1010 configured to receive tracking reference signal TRS group information, the TRS group including a first TRS and a second TRS, the TRS group information including an index of the TRS group and an index of the first TRS and an index of the second TRS; and a first TRS and a second TRS for receiving the signal sent by the network device;

a processing unit 1020, configured to perform symbol timing synchronization based on the first TRS and the second TRS.

Optionally, the TRS group further includes indication information for indicating whether symbol timing synchronization is supported by combining the first TRS and the second TRS.

Optionally, the terminal device 1000 further includes a sending unit 1030, configured to report capability information, where the capability information includes a frequency domain density of a TRS supported by the terminal device.

Optionally, the capability information includes at least one of the following information:

the frequency domain density of the TRS supported by the terminal equipment, the maximum timing measurement range supported by the terminal equipment, and whether the terminal equipment supports symbol timing synchronization by combining a plurality of TRSs.

The receiving unit 1010 is further configured to receive QC L indication information from the network device, where the QC L indication information is used to indicate that the first TRS and the second TRS are QC L references of a PDSCH (physical downlink shared channel).

Optionally, the QC L indicating information is an index of the TRS group.

Further, the receiving unit 1010 is specifically configured to receive the first TRS and the second TRS through the same OFDM symbol.

Further, the processing unit 1020 is specifically configured to determine a reference point for timing estimation; determining a timing measurement range based on the frequency domain densities of the first and second TRSs; and obtaining a symbol timing synchronization result based on the reference point of the timing estimation and the timing measurement range.

Further, the receiving unit 1010 is further configured to receive a PDSCH or a PDCCH or other downlink data based on the result of the symbol timing synchronization.

In another embodiment, terminal device 1000 includes the following elements:

a receiving unit 1010, configured to receive a first tracking reference signal TRS, and receive second TRS configuration information, where the second TRS configuration information includes a second TRS index and a first TRS index; receiving a second TRS;

Further, the receiving unit 1010 is further configured to receive QC L indication information, where the QC L indication information is used to indicate that the first TRS and the second TRS are QC L references of a PDSCH of a physical downlink shared channel.

Optionally, the receiving unit 1010 is further configured to receive an activation signaling, where the activation signaling is used to indicate that the second TRS is used in symbol timing synchronization in combination with the first TRS; and/or the activation signaling is used for indicating that the second TRS and a third TRS are jointly used for symbol timing synchronization.

Optionally, the receiving unit 1010 is further configured to receive a configuration message, where the configuration message is used to indicate a duration that the second TRS is used in symbol timing synchronization together with the first TRS; or the configuration message is used to indicate a duration that the second TRS and the third TRS are jointly used for symbol timing synchronization.

In particular, the processing unit 1020 is configured to determine a reference point for timing estimation; determining a timing measurement range based on the frequency domain densities of the first and second TRSs; and obtaining a symbol timing synchronization result based on the reference point of the timing estimation and the timing measurement range.

The receiving unit 1010 is further configured to receive a physical downlink shared channel PDSCH based on the result of the symbol timing synchronization.

Optionally, the terminal device 1000 further includes a sending unit 1030, configured to report capability information, where the capability information is used to indicate a frequency domain density of a TRS required by the terminal device or a frequency domain density of a maximum TRS supported by the terminal device, or send a request message, which is used to request a network device to send a second TRS.

Fig. 11 is a schematic block diagram of a terminal device 1100 provided in an embodiment of the present application. The terminal device 1100 may correspond to the terminal device in the above method embodiment, and may also correspond to the terminal device 1000 in the above embodiment. As shown in fig. 11, the terminal device 1100 includes a processor 1110, a memory 1120, and a transceiver 1130, the memory 1120 has a program stored therein, the processor 1110 is configured to execute the program stored in the memory 1120, and execute the program stored in the memory 1120, so that the processor 1110 is configured to perform the processing steps on the terminal device side in the above method embodiment, and execute the program stored in the memory 1120, so that the processor 1110 controls the transceiver 1130 to perform the receiving and transmitting steps on the terminal device side in the above method embodiment.

Therefore, the present application provides a scheme that, by configuring TRS groups, each of which includes at least two TRSs, a terminal device can obtain a TRS with a relatively high density of frequency domains, and perform symbol timing synchronization based on the TRS with the relatively high density, a relatively large timing measurement range can be obtained, so that when the terminal device uses a wide-beam transmission TRS, a sufficient timing measurement range can be obtained, and thus the TRS of the wide-beam transmission can be used as a timing reference for a physical channel of the narrow-beam transmission.

The embodiment of the application also provides a first communication device, and the first communication device can be a terminal device or a chip. The first communication means may be configured to perform the actions performed by the terminal device in the above-described method embodiments.

When the first communication device is a terminal device, fig. 12 shows a simplified structural diagram of the terminal device. For easy understanding and convenience of illustration, in fig. 12, the terminal device is exemplified by a mobile phone. As shown in fig. 12, the terminal device includes a processor, a memory, a radio frequency circuit, an antenna, and an input-output device. The processor is mainly used for processing communication protocols and communication data, controlling the terminal equipment, executing software programs, processing data of the software programs and the like. The memory is used primarily for storing software programs and data. The radio frequency circuit is mainly used for converting baseband signals and radio frequency signals and processing the radio frequency signals. The antenna is mainly used for receiving and transmitting radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, keyboards, etc., are used primarily for receiving data input by a user and for outputting data to the user. It should be noted that some kinds of terminal devices may not have input/output devices.

When data needs to be sent, the processor performs baseband processing on the data to be sent and outputs baseband signals to the radio frequency circuit, and the radio frequency circuit performs radio frequency processing on the baseband signals and sends the radio frequency signals to the outside in the form of electromagnetic waves through the antenna. When data is sent to the terminal equipment, the radio frequency circuit receives radio frequency signals through the antenna, converts the radio frequency signals into baseband signals and outputs the baseband signals to the processor, and the processor converts the baseband signals into the data and processes the data. For ease of illustration, only one memory and processor are shown in FIG. 12. In an actual end device product, there may be one or more processors and one or more memories. The memory may also be referred to as a storage medium or a storage device, etc. The memory may be provided independently of the processor, or may be integrated with the processor, which is not limited in this embodiment.

In the embodiment of the present application, the antenna and the radio frequency circuit having the transceiving function may be regarded as a transceiving unit of the terminal device, and the processor having the processing function may be regarded as a processing unit of the terminal device.

As shown in fig. 12, the terminal apparatus includes a transceiving unit 1201 and a processing unit 1202. A transceiver unit may also be referred to as a transceiver, a transceiving device, etc. A processing unit may also be referred to as a processor, a processing board, a processing module, a processing device, or the like. Optionally, a device for implementing a receiving function in the transceiving unit 1201 may be regarded as a receiving unit, and a device for implementing a transmitting function in the transceiving unit 1201 may be regarded as a transmitting unit, that is, the transceiving unit 1201 includes a receiving unit and a transmitting unit. A transceiver unit may also sometimes be referred to as a transceiver, transceiving circuitry, or the like. A receiving unit may also be referred to as a receiver, a receiving circuit, or the like. A transmitting unit may also sometimes be referred to as a transmitter, or a transmitting circuit, etc.

For example, in one implementation, the processing unit 1202 is configured to execute step 340 in fig. 3, and/or the processing unit 1202 is further configured to execute other processing steps on the terminal device side in this embodiment of the present application. The transceiving unit 1201 is further configured to perform steps 310, 320 and 330 shown in fig. 3, and/or the transceiving unit 1201 is further configured to perform other transceiving steps on the terminal device side.

For another example, in another implementation manner, the processing unit 1202 is configured to execute step 560 in fig. 5, and/or the processing unit 1202 is further configured to execute other processing steps on the terminal device side in this embodiment of the present application. The transceiving unit 1201 is further configured to perform steps 510, 520, 550, 560 and 570 shown in fig. 5, and/or the transceiving unit 1201 is further configured to perform other transceiving steps on the terminal device side.

For another example, in another implementation manner, the processing unit 1202 is configured to execute step 620 and step 660 in fig. 6, and/or the processing unit 1202 is further configured to execute other processing steps on the terminal device side in this embodiment of the present application. The transceiving unit 1201 is further configured to perform step 610, step 630, step 640, step 670 and step 680 shown in fig. 6, and/or the transceiving unit 1201 is further configured to perform other transceiving steps on the terminal device side.

It should be understood that fig. 12 is only an example and not a limitation, and the terminal device including the transceiving unit and the processing unit described above may not depend on the structure shown in fig. 12.

When the first communication device is a chip, the chip includes a transceiver unit and a processing unit. The transceiver unit can be an input/output circuit and a communication interface; the processing unit is a processor or a microprocessor or an integrated circuit integrated on the chip.

The embodiment of the present application further provides a second communication device, where the second communication device may be a network device or a chip. The second communication device may be configured to perform the actions performed by the network device in the above-described method embodiments.

When the second communication device is a network device, for example, a base station. Fig. 13 shows a simplified base station structure. The base station includes section 1301 and section 1302. The part 1301 is mainly used for receiving and transmitting radio frequency signals and converting the radio frequency signals and baseband signals; the section 1302 is mainly used for baseband processing, control of a base station, and the like. Portion 901 may be generally referred to as a transceiver unit, transceiver, transceiving circuitry, or transceiver, etc. Part 1302 is typically a control center of the base station, which may be generally referred to as a processing unit, for controlling the base station to perform the actions of generating the first message by the network device in the above-described method embodiments. Reference is made in particular to the description of the relevant part above.

The transceiver unit in section 1301 may also be referred to as a transceiver, or a transceiver, and includes an antenna and a radio frequency unit, where the radio frequency unit is mainly used for performing radio frequency processing. Optionally, a device used for implementing the receiving function in part 1301 may be regarded as a receiving unit, and a device used for implementing the sending function may be regarded as a sending unit, that is, part 1301 includes a receiving unit and a sending unit. A receiving unit may also be referred to as a receiver, a receiving circuit, or the like, and a transmitting unit may be referred to as a transmitter, a transmitting circuit, or the like.

Section 1302 may include one or more boards, each board may include one or more processors and one or more memories, the processors being configured to read and execute programs in the memories to implement baseband processing functions and control of the base station. If a plurality of single boards exist, the single boards can be interconnected to increase the processing capacity. As an alternative implementation, multiple boards may share one or more processors, multiple boards may share one or more memories, or multiple boards may share one or more processors at the same time.

For example, in one implementation manner, the transceiver unit is configured to perform the sending operation on the network device side in step 210 in fig. 3, the sending operation on the network device side in steps 330 and 360, and/or the transceiver unit is further configured to perform other transceiving steps on the network device side in this embodiment of the present application. The processing unit is configured to perform the actions of step 320 and step 350 in fig. 3, and/or the processing unit is further configured to perform other processing steps on the network device side in the embodiment of the present application.

For another example, in another implementation manner, the transceiver unit is configured to perform a receiving operation of the network device in step 510, a sending operation of the network device in step 520, step 550, and step 560 in fig. 5, and/or the transceiver unit is further configured to perform other transceiving steps of the network device in this embodiment. The processing unit is configured to perform the actions of step 530 and step 540 in fig. 5, and/or the processing unit is further configured to perform other processing steps on the network device side in the embodiment of the present application.

For another example, in another implementation manner, the transceiver unit is configured to perform the sending operation of the network device in step 610, step 640, step 670 in fig. 6, the receiving operation of the network device side in step 630, and/or the transceiver unit is further configured to perform other transceiving steps of the network device side in this embodiment. The processing unit is configured to perform the actions of step 640 and step 650 in fig. 6, and/or the processing unit is further configured to perform other processing steps on the network device side in the embodiment of the present application.

It should be understood that fig. 13 is only an example and not a limitation, and the network device including the transceiving unit and the processing unit may not depend on the structure shown in fig. 13.

When the second communication device is a chip, the chip includes a transceiver unit and a processing unit. The transceiver unit can be an input/output circuit and a communication interface; the processing unit is a processor or a microprocessor or an integrated circuit integrated on the chip.

The embodiment of the present application further provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a computer, the computer is enabled to implement the method on the terminal device side or the method on the network device side in the above method embodiments.

The embodiment of the present application further provides a computer program product containing instructions, and the instructions, when executed by a computer, enable the computer to implement the method on the terminal device side or the method on the network device side in the foregoing method embodiments.

For the explanation and beneficial effects of the related content in any of the communication apparatuses provided above, reference may be made to the corresponding method embodiments provided above, and details are not repeated here.

In the embodiments of the present application, a terminal device or a network device includes a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer, where the hardware layer includes hardware such as a Central Processing Unit (CPU), a Memory Management Unit (MMU), and a memory (also referred to as a main memory).

In addition, various aspects or features of the present application may be implemented as a method, apparatus, or article of manufacture using standard programming and/or engineering techniques. The term "article of manufacture" as used herein is intended to encompass a computer program accessible from any computer-readable device, carrier, or media. For example, computer-readable media can include but are not limited to magnetic storage devices (e.g., hard disk, floppy disk, magnetic strips, etc.), optical disks (e.g., Compact Disk (CD), Digital Versatile Disk (DVD), etc.), smart cards, and flash memory devices (e.g., erasable programmable read-only memory (EPROM), card, stick, or key drive, etc.). In addition, various storage media described herein can represent one or more devices and/or other machine-readable media for storing information. The term "machine-readable medium" can include, without being limited to, wireless channels and various other media capable of storing, containing, and/or carrying instruction(s) and/or data.

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

It should also be understood that the memories referred to in the embodiments of the present application may be either volatile Memory or nonvolatile Memory, or may include both volatile and nonvolatile Memory, where nonvolatile Memory may be Read-Only Memory (ROM), Programmable Read-Only Memory (PROM), Erasable Programmable Read-Only Memory (EPROM), Electrically Erasable Programmable Read-Only Memory (EEPROM), or flash Memory volatile Memory may be Random Access Memory (RAM), which serves as external cache Memory, and many forms of RAM are available, such as Static Random Access Memory (Static RAM, SRAM), Dynamic Random Access Memory (Dynamic DRAM, DRAM), Synchronous Dynamic Random Access Memory (Synchronous DRAM, SDRAM), Double data rate Synchronous Dynamic Random Access Memory (Double data rate, DDR), Enhanced Synchronous Dynamic Random Access Memory (Enhanced SDRAM), SDRAM, or SDRAM, Direct Access Memory (SDRAM, L).

It should be noted that when the processor is a general-purpose processor, a DSP, an ASIC, an FPGA or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, the memory (memory module) is integrated in the processor.

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

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

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 configuring information, comprising:

configuring and transmitting Tracking Reference Signal (TRS) group information, wherein the TRS group comprises a first TRS and a second TRS;

the TRS group information includes an index of a TRS group, and an index of a first TRS and an index of a second TRS;

and transmitting the first TRS and the second TRS so that the terminal equipment performs symbol timing synchronization according to the TRS group.

2. The method of claim 1, wherein the TRS group further comprises indication information for indicating whether the terminal device needs to perform symbol timing synchronization in conjunction with the first TRS and the second TRS.

3. The method according to claim 1 or 2, characterized in that the method further comprises:

receiving capability information reported by the terminal equipment, wherein the capability information comprises at least one of the following information:

the frequency domain density of the TRS supported by the terminal device or the frequency domain density of the TRS required by the terminal device, the maximum timing measurement range supported by the terminal device or the timing measurement range required by the terminal device, and whether the terminal device supports symbol timing synchronization by combining a plurality of TRSs.

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

and configuring and transmitting QC L indication information, wherein the QC L indication information is used for indicating that the first TRS and the second TRS are referenced by QC L of a Physical Downlink Shared Channel (PDSCH) or a Physical Downlink Control Channel (PDCCH).

5. The method according to claim 4, wherein the QC L indication information is carried by a QC L-info data structure.

6. The method according to claim 4 or 5, wherein the QC L indication information is an index of the TRS group.

7. The method according to any one of claims 1-6, wherein the transmitting the first TRS and the second TRS specifically comprises:

and the first TRS and the second TRS are carried on the same orthogonal frequency division multiplexing OFDM symbol for transmission.

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

and sending a Physical Downlink Shared Channel (PDSCH).

9. A method of configuring information, comprising:

receiving Tracking Reference Signal (TRS) group information, wherein the TRS group comprises a first TRS and a second TRS;

the TRS group information includes an index of the TRS group and an index of a first TRS and an index of a second TRS;

receiving a first TRS and a second TRS sent by the network equipment;

performing symbol timing synchronization based on the first TRS and the second TRS.

10. The method of claim 9, wherein the TRS group further comprises indication information indicating whether symbol timing synchronization is required in conjunction with the first TRS and the second TRS.

11. The method according to claim 9 or 10, characterized in that the method further comprises:

reporting capability information, wherein the capability information comprises at least one of the following information:

12. The method according to any one of claims 9-11, further comprising:

receiving QC L indication information from the network device, wherein the QC L indication information is used for indicating that the first TRS and the second TRS are QC L references of a Physical Downlink Shared Channel (PDSCH).

13. The method according to claim 12, wherein said QC L indicating information is carried by QC L-info data structure.

14. The method according to any one of claims 12 to 13, wherein the QC L indicating information is an index of the TRS group.

15. The method according to any of claims 9-14, wherein the first TRS and the second TRS are received through the same OFDM symbol.

16. The method according to any one of claims 9-15, wherein the performing symbol timing synchronization based on the first TRS and the second TRS specifically comprises:

determining a reference point for timing estimation;

determining a timing measurement range based on the frequency domain densities of the first and second TRSs;

and obtaining a symbol timing synchronization result based on the reference point of the timing estimation and the timing measurement range.

17. The method of claim 16, further comprising:

and receiving a Physical Downlink Shared Channel (PDSCH) based on the result of the symbol timing synchronization.

18. A method for configuring information, the method comprising:

transmitting a first tracking reference signal TRS;

configuring and transmitting second TRS configuration information, wherein the second TRS configuration information comprises a second TRS index and a first TRS index;

and transmitting the second TRS so that the terminal equipment carries out symbol timing synchronization based on the first TRS and the second TRS.

19. The method of claim 18, further comprising:

and transmitting QC L indication information, wherein the QC L indication information is used for indicating that the first TRS and the second TRS are QC L references of a Physical Downlink Shared Channel (PDSCH).

20. The method according to claim 19, wherein said QC L indicating information is carried by QC L-info data structure.

21. The method according to claim 19 or 20, wherein the QC L indication information is an index of the first TRS or an index of the second TRS.

22. The method according to any one of claims 18-21, further comprising:

and sending a Physical Downlink Shared Channel (PDSCH).

23. The method of any one of claims 18-22, wherein the second TRS configuration information further comprises:

the third TRS index.

24. The method of claim 23, further comprising:

transmitting an activation signaling indicating that the second TRS is used in symbol timing synchronization in combination with the first TRS; and/or the presence of a gas in the gas,

the activation signaling is used to indicate that the second TRS and a third TRS are jointly used for symbol timing synchronization.

25. The method according to claim 23 or 24, further comprising:

sending a configuration message, where the configuration message is used to indicate a duration of the symbol timing synchronization used by the second TRS and the first TRS in combination; or the configuration message is used to indicate a duration that the second TRS and the third TRS are jointly used for symbol timing synchronization.

26. A method for configuring information, the method comprising:

a first tracking reference signal TRS is received,

receiving second TRS configuration information, wherein the second TRS configuration information comprises a second TRS index and a first TRS index;

receiving a second TRS;

27. The method of claim 26, further comprising:

and receiving QC L indication information, wherein the QC L indication information is used for indicating that the first TRS and the second TRS are QC L references of a Physical Downlink Shared Channel (PDSCH).

28. The method according to claim 27, wherein said QC L indicating information is carried by QC L-info data structure.

29. The method according to claim 27 or 28, wherein the QC L indication information is an index of the first TRS or an index of the second TRS.

30. The method of any of claims 26-29, wherein the second TRS configuration information further comprises:

the third TRS index.

31. The method of claim 30, further comprising:

receiving activation signaling indicating that the second TRS is used in conjunction with the first TRS for symbol timing synchronization; and/or the presence of a gas in the gas,

32. The method of claim 30 or 31, further comprising:

receiving a configuration message, where the configuration message is used to indicate a duration that the second TRS and the first TRS are jointly used for symbol timing synchronization; or the configuration message is used to indicate a duration that the second TRS and the third TRS are jointly used for symbol timing synchronization.

33. The method according to any one of claims 26-32, wherein the performing symbol timing synchronization based on the first TRS and the second TRS specifically comprises:

determining a reference point for timing estimation;

34. The method of claim 33, further comprising:

35. A communications apparatus, comprising a memory to store instructions and a processor to execute the memory-stored instructions, and wherein execution of the instructions stored in the memory causes the processor to perform the method of any of claims 1 to 8 or causes the processor to perform the method of any of claims 18-25.

36. A communications apparatus, comprising a memory to store instructions and a processor to execute the memory-stored instructions, and wherein execution of the instructions stored in the memory causes the processor to perform the method of any of claims 9 to 17 or causes the processor to perform the method of any of claims 26-34.

37. An apparatus, comprising:

a receiving unit, configured to receive tracking reference signal TRS group information, where the TRS group includes a first TRS and a second TRS, and the TRS group information includes an index of the TRS group and an index of the first TRS and an index of the second TRS; and a first TRS and a second TRS for receiving the signal sent by the network device;

a processing unit, configured to perform symbol timing synchronization based on the first TRS and the second TRS.

38. The apparatus of claim 37, wherein the TRS group further comprises indication information indicating whether symbol timing synchronization is required in conjunction with the first TRS and the second TRS.

39. The apparatus according to claim 37 or 38, wherein the apparatus further comprises a sending unit, configured to report capability information, where the capability information includes at least one of the following information:

40. The apparatus according to any of claims 37-39, wherein the receiving unit is further configured to receive QC L indication information from the network device, the QC L indication information indicating that the first TRS and the second TRS are QC L references of a Physical Downlink Shared Channel (PDSCH).

41. The apparatus as claimed in claim 40, wherein the QC L indication information is carried by QC L-info data structures.

42. The apparatus according to claim 40 or 41, wherein the QC L indication information is an index of the TRS group.

43. The apparatus according to any one of claims 37 to 42, wherein the processing unit is specifically configured to: determining a reference point for timing estimation; determining a timing measurement range based on the frequency domain densities of the first and second TRSs; and obtaining a symbol timing synchronization result based on the reference point of the timing estimation and the timing measurement range.

44. The apparatus of claim 43, wherein the receiving unit is configured to receive a Physical Downlink Shared Channel (PDSCH) based on the result of the symbol timing synchronization.

45. A computer-readable storage medium, having stored thereon a computer program which, when executed by a computer, causes the computer to carry out the method of any one of claims 1 to 8 or causes the computer to carry out the method of any one of claims 18 to 25.

46. A computer-readable storage medium, having stored thereon a computer program which, when executed by a computer, causes the computer to carry out the method of any one of claims 9 to 17 or causes the computer to carry out the method of any one of claims 26 to 34.