CN110768768B

CN110768768B - Resource allocation method of sounding reference signal and communication device

Info

Publication number: CN110768768B
Application number: CN201810847229.7A
Authority: CN
Inventors: 赵淼; 朱有团; 赵晓沐
Original assignee: Shanghai Huawei Technologies Co Ltd
Current assignee: Shanghai Huawei Technologies Co Ltd
Priority date: 2018-07-27
Filing date: 2018-07-27
Publication date: 2022-06-10
Anticipated expiration: 2038-07-27
Also published as: CN110768768A

Abstract

The application provides a resource allocation method and a communication device for sounding reference signals, which are used for determining a first SRS resource from an SRS resource pool containing at least one SRS resource and sending first information for indicating the first SRS resource to terminal equipment, so that the terminal equipment sends the SRS on the first SRS resource. In the process, because the symbol position of the first SRS resource is different from the symbol position of the second SRS resource, and/or the frequency domain combing position of the first SRS resource is different from the frequency domain combing position of the second SRS resource, the second SRS resource is an SRS resource used by terminal equipment in a second cell, and the second cell is a cell different from the first cell, it is possible to overcome the problems that when the SRS between the cells uses the same resource, inter-cell interference is caused, the signal-to-noise ratio of the SRS is reduced, and the downlink system capacity is low.

Description

Resource allocation method of sounding reference signal and communication device

Technical Field

The present application relates to the field of communications technologies, and in particular, to a method for resource allocation of sounding reference signals and a communications apparatus.

Background

At present, in order to improve the spectrum utilization rate, a mode of co-frequency networking is introduced in Long Term Evolution (LTE) and the 5th Generation Mobile Communication (5G) systems, and the co-frequency networking brings about the problem of inter-cell interference while improving the spectrum utilization rate.

A Sounding Reference Signal (SRS) is a Signal used between a terminal device and a base station to measure a wireless Channel State Information (CSI). For SRS, because the scheduling is frequent and is often used for measurement estimation, channel quality detection, and the like, if the SRS between cells uses the same resource, serious inter-cell interference occurs, resulting in a decrease in the signal-to-noise ratio of the SRS. The reduction of the SRS signal-to-noise ratio seriously affects the capacity of the downlink system.

Therefore, how to configure SRS resources becomes a problem to be solved urgently.

Disclosure of Invention

The application provides a resource allocation method and a communication device for sounding reference signals, which are used for solving the problems of signal-to-noise ratio reduction and low downlink system capacity of SRS (sounding reference signal) caused by inter-cell interference when the SRS among cells adopts the same resource.

In a first aspect, the method for resource configuration of a sounding reference signal provided in an embodiment of the present application may be applied to an access network device, and may also be applied to a chip in the access network device. The method is described below by taking the application to the access network device as an example, and the method includes:

determining a first SRS resource from a Sounding Reference Signal (SRS) resource set, wherein the SRS resource set comprises at least one SRS resource, the first SRS resource is a resource for a terminal device to send an SRS, a cell where the terminal device is located is a first cell, symbol positions and/or frequency domain comb positions of the first SRS resource and a second SRS resource are different, the second SRS resource is an SRS resource used by the terminal device in a second cell, and the second cell is different from the first cell;

Sending first information to the terminal device, wherein the first information is used for indicating the first SRS resource;

and receiving the SRS sent by the terminal equipment on the first SRS resource.

With the resource allocation method for sounding reference signals provided by the first aspect, a first SRS resource is determined from an SRS resource pool including at least one SRS resource, and first information indicating the first SRS resource is sent to a terminal device, so that the terminal device sends an SRS on the first SRS resource. In the process, because the symbol position of the first SRS resource is different from the symbol position of the second SRS resource, and/or the frequency domain combing position of the first SRS resource is different from the frequency domain combing position of the second SRS resource, the second SRS resource is an SRS resource used by terminal equipment in a second cell, and the second cell is a cell different from the first cell, it is possible to overcome the problems that when the SRS between the cells uses the same resource, inter-cell interference is caused, the signal-to-noise ratio of the SRS is reduced, and the downlink system capacity is low.

In a possible implementation manner, the determining a first SRS resource from a set of SRS resources for sounding reference signals includes:

determining a frequency domain combing position of the first SRS resource and/or a symbol position of the first SRS resource according to the cell identifier of the first cell, the SRS identifier of the terminal equipment, the time slot number of the first cell, the SRS combing number of the terminal equipment and second information; the second information is used for indicating whether the first SRS resource is randomly configured for the terminal equipment or not;

Determining the number of symbols required to be used by the terminal equipment for sending the SRS according to the Received Signal Strength Indication (RSSI) of the terminal equipment in the first cell, the number of the terminal equipment residing in the first cell, the number of SRS comb numbers of the terminal equipment and the second information;

and determining the first SRS resource from the SRS resource set according to the frequency domain combing position of the first SRS resource and/or the symbol position of the first SRS resource, the symbol number information and the second information.

According to the configuration method of the sounding reference signal provided by the possible implementation manner, the frequency domain combing position and/or the symbol position of the first SRS resource and the number of the symbols are determined, and the first SRS resource is determined according to the frequency domain combing position and/or the symbol position of the first SRS resource and the number of the symbols, so that the aim of randomly allocating the SRS resource by the terminal equipment is fulfilled, the terminal equipment does not need to send the SRS on the fixed SRS resource, the SRS interference between cells is reduced, and the capacity of a downlink system is improved.

In a possible implementation manner, before determining the first SRS resource from the set of SRS resources for sounding reference signals, the method further includes:

Receiving third information sent by the terminal equipment, wherein the third information is used for indicating a Precoding Matrix Indicator (PMI) and a signal to interference plus noise ratio (SINR) reported by the terminal equipment;

determining whether to allocate the SRS resource set to the terminal equipment or not according to the PMI and the SINR;

when the SRS resources are distributed to the terminal equipment, determining the priority of the terminal equipment;

and determining the SRS resource set corresponding to the priority according to the priority.

According to the configuration method of the sounding reference signal provided by the possible implementation manner, when the access network equipment determines that the SRS resource needs to be allocated to the terminal equipment according to the precoding matrix indicator PMI and the signal to interference plus noise ratio SINR reported by the terminal equipment, the SRS resource set corresponding to the priority is determined according to the priority of the terminal equipment, and the purpose of flexibly allocating the SRS resource set to the terminal equipment is achieved.

In a possible implementation manner, the determining whether to allocate the SRS resource set to the terminal device according to the PMI and the SINR includes:

determining whether the PMI sent by the terminal equipment is received or not, and whether the SINR sent by the terminal equipment exceeds a preset threshold or not;

When the PMI sent by the terminal equipment is received and the SINR sent by the terminal equipment exceeds the preset threshold, determining that the SRS resource set is not allocated to the terminal equipment, or,

when the PMI sent by the terminal equipment is not received, or the SINR sent by the terminal equipment does not exceed a preset threshold, determining that the SRS resource set is allocated to the terminal equipment, wherein the SRS resource set is not empty.

By the configuration method of the sounding reference signal provided by the possible implementation manner, whether the terminal equipment is allocated with the SRS set or not is determined according to the PMI and the SINR reported by the terminal, and the purpose of flexibly allocating the SRS resource set to the terminal equipment is achieved.

and determining the SRS resource set according to the position of the terminal equipment in the first cell.

By the configuration method of the sounding reference signal provided by the possible implementation manner, the SRS resource can be flexibly allocated to the terminal device according to the position of the terminal device in the first cell.

In a possible implementation manner, the determining the SRS resource set according to the location of the terminal device in the first cell includes:

When the terminal device is not located at the edge of the first cell, determining that the SRS resource set contains all SRS resources of the first cell; alternatively, the first and second liquid crystal display panels may be,

when the terminal device is located at the edge of the first cell, determining that the SRS resource set contains one third of all SRS resources of the first cell.

determining whether Reference Signal Received Power (RSRP) of the terminal equipment in the second cell exceeds a preset threshold or not;

and when the RSRP exceeds a preset threshold, deleting a third SRS resource from the SRS resource set corresponding to the first cell, and taking the remaining SRS resource as a resource in the SRS resource set, wherein the third SRS resource is the same resource as a resource used by the terminal equipment of the second cell to transmit the SRS.

The configuration method of the sounding reference signal provided by the possible implementation manner avoids interference caused by the fact that the terminal equipment uses the same SRS resource in different cells through active avoidance.

In a second aspect, an embodiment of the present application provides a method for resource configuration of a sounding reference signal SRS, including:

receiving first information sent by access network equipment, wherein the first information is used for indicating a first Sounding Reference Signal (SRS) resource, the first SRS resource is a resource for sending an SRS by terminal equipment, a cell where the terminal equipment is located is a first cell, an SRS resource set comprises at least one SRS resource, the first SRS resource is one of the SRS resource set, the symbol position and/or frequency domain combing position of the first SRS resource and a second SRS resource are different, the second SRS resource is an SRS resource used by the terminal equipment in a second cell, and the second cell is a cell different from the first cell;

transmitting an SRS on the first SRS resource.

With the resource allocation method for sounding reference signals provided in the second aspect, the access network device determines a first SRS resource from an SRS resource pool including at least one SRS resource, and sends first information indicating the first SRS resource to the terminal device. Correspondingly, the terminal equipment receives the first information and transmits the SRS on the first SRS resource. In the process, because the symbol position of the first SRS resource is different from the symbol position of the second SRS resource, and/or the frequency domain combing position of the first SRS resource is different from the frequency domain combing position of the second SRS resource, the second SRS resource is an SRS resource used by terminal equipment in a second cell, and the second cell is a cell different from the first cell, it is possible to overcome the problems that when the SRS between the cells uses the same resource, inter-cell interference is caused, the signal-to-noise ratio of the SRS is reduced, and the downlink system capacity is low.

In a possible implementation manner, before receiving the first information sent by the access network device, the method further includes;

and sending third information to the access network equipment, wherein the third information is used for indicating a Precoding Matrix Indicator (PMI) and a signal to interference plus noise ratio (SINR) reported by the terminal equipment.

According to the configuration method of the sounding reference signal provided by the possible implementation manner, the terminal equipment indicates the PMI and the SINR to the precoding matrix reported by the access network equipment, and when the access network equipment determines that the SRS resource needs to be allocated to the terminal equipment according to the information, the SRS resource set corresponding to the priority is determined according to the priority of the terminal equipment, so that the aim of flexibly allocating the SRS resource set to the terminal equipment is fulfilled.

In a third aspect, an embodiment of the present application provides a communication apparatus, including:

a processing unit, configured to determine a first SRS resource from a sounding reference signal SRS resource set, where the SRS resource set includes at least one SRS resource, the first SRS resource is a resource for a terminal device to send an SRS, a cell where the terminal device is located is a first cell, symbol positions and/or frequency-domain comb positions of the first SRS resource and a second SRS resource are different, the second SRS resource is an SRS resource used by a terminal device in a second cell, and the second cell is a different cell from the first cell;

A sending unit, configured to send first information to the terminal device, where the first information is used to indicate the first SRS resource;

a receiving unit, configured to receive an SRS sent by the terminal device on the first SRS resource.

In a feasible implementation manner, the processing unit is specifically configured to determine a frequency domain combing position of the first SRS resource and/or a symbol position of the first SRS resource according to the cell identifier of the first cell, the SRS identifier of the terminal device, the slot number of the first cell, the number of SRS combs of the terminal device, and second information; the second information is used for indicating whether the first SRS resource is randomly configured for the terminal equipment or not; determining the number of symbols required to be used by the terminal equipment for sending the SRS according to the received signal strength indication RSSI of the terminal equipment in the first cell, the number of the terminal equipment residing in the first cell, the number of SRS comb points of the terminal equipment and the second information; and determining the first SRS resource from the SRS resource set according to the frequency domain combing position of the first SRS resource and/or the symbol position of the first SRS resource, the symbol number information and the second information.

In a feasible implementation manner, the receiving unit is further configured to receive third information sent by the terminal device before the processing unit determines the first SRS resource from the SRS resource set, where the third information is used to indicate a precoding matrix indicator PMI and a signal to interference plus noise ratio SINR reported by the terminal device;

the processing unit is further configured to determine whether to allocate the SRS resource set to the terminal device according to the PMI and the SINR; when the SRS resources are distributed to the terminal equipment, determining the priority of the terminal equipment; and determining the SRS resource set corresponding to the priority according to the priority.

In a feasible implementation manner, when determining whether to allocate the SRS resource set to the terminal device according to the PMI and the SINR, the processing unit is specifically configured to determine whether the receiving unit receives the PMI sent by the terminal device and the SINR sent by the terminal device exceeds a preset threshold; when the receiving unit receives the PMI sent by the terminal equipment and the SINR sent by the terminal equipment exceeds the preset threshold, determining that the SRS resource set is not allocated to the terminal equipment, or when the receiving unit does not receive the PMI sent by the terminal equipment or the SINR sent by the terminal equipment does not exceed the preset threshold, determining that the SRS resource set is allocated to the terminal equipment and the SRS resource set is not empty.

In a possible implementation manner, before determining a first SRS resource from a set of SRS resources for sounding reference signals, the processing unit is further configured to determine the set of SRS resources according to a position of the terminal device in the first cell.

In a possible implementation manner, when determining the SRS resource set according to the position of the terminal device in the first cell, the processing unit is specifically configured to determine that the SRS resource set includes all SRS resources of the first cell when the terminal device is not located at the edge of the first cell; or, when the terminal device is located at the edge of the first cell, determining that the SRS resource set includes one third of all SRS resources of the first cell

In a possible implementation manner, before determining the first SRS resource in the SRS resource set, the processing unit is further configured to determine whether reference signal received power, RSRP, of the terminal device in the second cell exceeds a preset threshold; and when the RSRP exceeds a preset threshold, deleting a third SRS resource from the SRS resource set corresponding to the first cell, and taking the remaining SRS resource as a resource in the SRS resource set, wherein the third SRS resource is the same resource as a resource used by the terminal equipment of the second cell to transmit the SRS.

The beneficial effects of the communication apparatus provided in each possible implementation manner of the third aspect and the third aspect may refer to the beneficial effects brought by each possible implementation manner of the first aspect and the first aspect, which are not described herein again.

In a fourth aspect, an embodiment of the present application provides a communication apparatus, including:

a receiving unit, configured to receive first information sent by access network equipment, where the first information is used to indicate a first Sounding Reference Signal (SRS) resource, the first SRS resource is a resource for a terminal device to send an SRS, a cell where the terminal device is located is a first cell, an SRS resource set includes at least one SRS resource, the first SRS resource is one of the SRS resource set, symbol positions and/or frequency domain comb positions of the first SRS resource and a second SRS resource are different, the second SRS resource is an SRS resource used by the terminal device in a second cell, and the second cell is a cell different from the first cell;

a transmitting unit, configured to transmit an SRS on the first SRS resource.

In a feasible implementation manner, the sending unit is further configured to send third information to the access network device before the receiving unit receives the first information sent by the access network device, where the third information is used to indicate a precoding matrix indicator PMI and a signal to interference plus noise ratio SINR reported by the terminal device.

The beneficial effects of the communication device provided by the fourth aspect and each possible implementation manner of the fourth aspect may refer to the beneficial effects brought by the first aspect and each possible implementation manner of the first aspect, which are not described herein again.

In a fifth aspect, an embodiment of the present application provides a communication apparatus, including: a processor, a memory, a receiver, a transmitter; the receiver and the transmitter are both coupled to the processor, the processor controlling the receiving action of the receiver, the processor controlling the transmitting action of the transmitter;

wherein the memory is to store computer executable program code, the program code comprising instructions; the instructions, when executed by the processor, cause the communication device to perform a method of network configuration as provided by the first aspect or each possible implementation of the first aspect.

In a sixth aspect, an embodiment of the present application provides a communication apparatus, including: a processor, a memory, a receiver, a transmitter; the receiver and the transmitter are both coupled to the processor, the processor controlling the receiving action of the receiver, the processor controlling the transmitting action of the transmitter;

In a seventh aspect, an embodiment of the present application provides a communication apparatus, which includes a unit, a module, or a circuit configured to perform the method provided in the first aspect or each possible implementation manner of the first aspect. The communication device may be an access network device, or may be a module applied to the access network device, for example, a chip applied to the access network device.

In an eighth aspect, embodiments of the present application provide a communication apparatus, which includes a unit, a module, or a circuit for performing the method provided in the second aspect or each possible implementation manner of the second aspect. The communication device may be a terminal device, or may be a module applied to the terminal device, for example, a chip applied to the terminal device.

In a ninth aspect, embodiments of the present application provide a computer program product containing instructions, which when run on a computer, cause the computer to perform the method of the first aspect or the various possible implementations of the first aspect.

In a tenth aspect, embodiments of the present application provide a computer program product comprising instructions that, when executed on a computer, cause the computer to perform the method of the second aspect or the various possible implementations of the second aspect.

In an eleventh aspect, embodiments of the present application provide a computer-readable storage medium, which stores instructions that, when executed on a computer, cause the computer to perform the method in the first aspect or the various possible implementations of the first aspect.

In a twelfth aspect, embodiments of the present application provide a computer-readable storage medium, which has instructions stored therein, and when the computer-readable storage medium runs on a computer, the computer is caused to execute the method in the second aspect or the various possible implementation manners of the second aspect.

According to the resource allocation method and the communication device for the sounding reference signal, the first SRS resource is determined from the SRS resource pool containing at least one SRS resource, and the first information used for indicating the first SRS resource is sent to the terminal equipment, so that the terminal equipment sends the SRS on the first SRS resource. In the process, because the symbol position of the first SRS resource is different from the symbol position of the second SRS resource, and/or the frequency domain combing position of the first SRS resource is different from the frequency domain combing position of the second SRS resource, the second SRS resource is an SRS resource used by terminal equipment in a second cell, and the second cell is a cell different from the first cell, it is possible to overcome the problems that when the SRS between the cells uses the same resource, inter-cell interference is caused, the signal-to-noise ratio of the SRS is reduced, and the downlink system capacity is low.

Drawings

Fig. 1A is a schematic diagram of a communication system architecture of a resource allocation method for SRS according to an embodiment of the present invention;

fig. 1B is a schematic diagram of a communication system architecture of another resource allocation method suitable for an SRS according to an embodiment of the present application;

fig. 2 is a flowchart of a method for configuring SRS resources according to an embodiment of the present application;

fig. 3 is a schematic diagram of a first SRS resource provided in an embodiment of the present application;

fig. 4 is a schematic diagram of a cell to which a method for SRS resource allocation according to an embodiment of the present invention is applied;

fig. 5 is a schematic structural diagram of a communication device according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of another communication device according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of another communication device according to an embodiment of the present application;

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

Detailed Description

The SRS resource allocation method described herein can be used in various Communication systems, such as Global System for Mobile communications (GSM), Code Division Multiple Access (CDMA) systems, Time Division Multiple Access (TDMA) systems, Wideband Code Division Multiple Access (WCDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Access (SC-FDMA), General Packet Radio Service (General Packet Radio Service, GPRS), third Generation Mobile Communication (the 3rd three Generation Communication, Mobile Communication, G3), long Term Evolution (LTE) systems, the 5th Generation Mobile Communication (5G) systems, and other such Communication systems.

The terminal device, also referred to as a User Equipment (UE), in the embodiments of the present application is a device that provides voice and/or data connectivity to a User, for example, a handheld device, a vehicle-mounted device, and the like having a wireless connection function. Common terminal devices include: the mobile phone includes a mobile phone, a tablet computer, a notebook computer, a palm computer, a Mobile Internet Device (MID), and a wearable device such as a smart watch, a smart bracelet, a pedometer, and the like.

The access network device in this embodiment may be a common base station (e.g., a NodeB or an eNB or a gNB), a New Radio controller (NR controller), a Centralized network element (Centralized Unit), a New wireless base station, a remote Radio module, a micro base station, a relay (relay), a Distributed network element (Distributed Unit), a Reception Point (TRP), a Transmission Point (TP), or any other device, but the embodiment of the present invention is not limited thereto.

The symbol described in the embodiment of the present application generally refers to an Orthogonal Frequency Division Multiplexing (OFDM) symbol, a Sparse Code Division Multiple Access (SCMA) symbol, a Filtered Orthogonal Frequency Division Multiplexing (F-OFDM) symbol, a Non-Orthogonal Multiple Access (NOMA) symbol, and the like.

For convenience and clarity of description, the communication system architecture of the present application is specifically described in detail by taking the communication system architecture as an example, specifically a 5G system. In particular, please refer to fig. 1.

Fig. 1A is a schematic view of a communication system architecture of a resource allocation method applicable to an SRS according to an embodiment of the present application, where in the schematic view, a coverage area of an access network device forms multiple cells, such as a cell 1, a cell 2, a cell 3, and a cell 4, and the cells do not cooperate with each other. Fig. 1B is a schematic view of a communication system architecture of another resource allocation method suitable for an SRS according to an embodiment of the present invention, where each cooperative access network device forms a cell, and a plurality of cooperative access network devices respectively correspond to a plurality of cooperative cells, such as a cell 5, a cell 6, a cell 7, and a cell 8, and the cells are cooperative cells with each other.

Referring to fig. 1A and fig. 1B, in this embodiment, for a terminal device in a cell, an access network device determines a first SRS resource from an SRS resource set, where the first SRS resource is different from a resource for a terminal device in another cell to transmit an SRS. Next, the SRS resource allocation method according to the present application will be described in detail with reference to fig. 1A and 1B. In particular, see fig. 2.

Fig. 2 is a flowchart of a method for configuring SRS resources according to an embodiment of the present application. The present embodiment relates to a detailed description of a resource allocation method for SRS described in the present application from the perspective of interaction between an access network device and a terminal device. As shown in fig. 2, the method includes:

101. a first SRS resource is determined from a set of Sounding Reference Signal (SRS) resources.

The SRS resource set comprises at least one SRS resource, the first SRS resource is a resource for sending SRS by terminal equipment, the cell where the terminal equipment is located is a first cell, the symbol position of the first SRS resource is different from the symbol position of a second SRS resource, and/or the frequency domain combing position of the first SRS resource is different from the frequency domain combing position of the second SRS resource, the second SRS resource is an SRS resource used by the terminal equipment in a second cell, and the second cell is a cell different from the first cell.

For example, referring to fig. 1A, a first cell is a cell 1, a second cell is a cell 2, a cell 3, and a cell 4, and for a terminal device in the cell 1, an access network device determines a first SRS resource from an SRS resource pool of the terminal device, where symbol positions of the first SRS resource and the second SRS resource are different, but a frequency-domain comb position is the same; or the frequency domain comb positions of the first SRS resource and the second SRS resource are different, but the symbol positions are the same; or, the frequency domain comb positions and the symbol positions of the first SRS resource and the second SRS resource are different. The second SRS resource is an SRS resource used when a terminal device in cell 2, cell 3, or cell 4 transmits an SRS.

For another example, referring to fig. 1B, the first cell is a cell 5, the second cell is a cell 6, a cell 7, and a cell 8, and for a terminal device in the cell 5, an access network device in the cell 5 determines a first SRS resource from an SRS resource pool of the terminal device, where symbol positions of the first SRS resource and the second SRS resource are different, but frequency domain combing positions are the same; or the frequency domain comb positions of the first SRS resource and the second SRS resource are different, but the symbol positions are the same; or, the frequency domain comb positions and the symbol positions of the first SRS resource and the second SRS resource are different. The second SRS resource is an SRS resource used when a terminal device in the cell 6, the cell 7, or the cell 8 transmits an SRS.

102. And sending the first information to the terminal equipment.

Wherein the first information is used for indicating the first SRS resource.

Correspondingly, the access network equipment receives the first information for indicating the first SRS resource.

103, receiving the SRS transmitted by the terminal device on the first SRS resource.

After receiving the first information, the terminal equipment sends the SRS on the first SRS resource; accordingly, the access network device receives the SRS.

According to the SRS resource configuration method provided by the embodiment of the invention, the first SRS resource is determined from the SRS resource pool containing at least one SRS resource, and the first information used for indicating the first SRS resource is sent to the terminal equipment, so that the terminal equipment sends the SRS on the first SRS resource. In the process, because the symbol position of the first SRS resource is different from the symbol position of the second SRS resource, and/or the frequency domain combing position of the first SRS resource is different from the frequency domain combing position of the second SRS resource, the second SRS resource is an SRS resource used by terminal equipment in a second cell, and the second cell is a cell different from the first cell, it is possible to overcome the problems that when the SRS between the cells uses the same resource, inter-cell interference is caused, the signal-to-noise ratio of the SRS is reduced, and the downlink system capacity is low.

Next, how to determine the first SRS resource from the set of SRS resources in the above embodiment is described in detail.

In a possible implementation manner, when a first SRS resource is determined from an SRS resource set, a frequency domain combing position of the first SRS resource and/or a symbol position of the first SRS resource is determined according to a cell identifier of the first cell, an SRS identifier of the terminal device, a slot number of the first cell, an SRS combing number of the terminal device, and second information; the second information is used for indicating whether the first SRS resource is randomly configured for the terminal equipment, the second information is preset information of the access network equipment and is equivalent to a switch, when the switch is set to be in an on state by the second information, the access network equipment is indicated to randomly configure the first SRS resource for the terminal equipment, and when the switch is set to be in an off state by the second information, the access network equipment is indicated to randomly configure the first SRS resource for the terminal equipment; determining the number information of symbols required to be used by the terminal equipment for sending the SRS according to the received signal strength indication RSSI of the terminal equipment in the first cell, the number of the terminal equipment residing in the first cell, the number of SRS comb points of the terminal equipment and the second information; and determining the first SRS resource from the SRS resource set according to the frequency domain combing position of the first SRS resource and/or the symbol position of the first SRS resource, the symbol number information and the second information.

Specifically, the 5G protocol specifies: the SRS may occupy multiple systematic symbols for transmission, with each terminal device having a maximum occupied symbol limit. Suppose the SRS initial symbol position in cell i is lⁱ _statThe number of symbols occupied by SRS is Nⁱ _sym. The SRS exists in a comb format, i.e., different SRS has different symbol positions and different symbol numbers. Number of combs of SRS is N_TCSupport of N in 5G protocol_TCScenario 4. Suppose that the frequency domain comb position of terminal device m in cell i is k_i ^mWhen N is present_TCWhen it is 4, k_i ^mMay be configured as 0, 1, 2, 3. The Identity (Identity, ID) of the SRS of terminal device m in cell i is denoted Seq_i ^mIn 5G protocol, the SRS ID of each terminal device in a cell, the cell identity i and the terminal device identityThe identity m is related to not only the identity i of the cell.

In the embodiment of the application, when the first SRS resource is determined, the access network device queries preset second information, and determines whether to randomly configure the first SRS resource for the terminal device according to the second information. The second information can be understood as a randomization enabling switch, and when the switch is turned on, it indicates that the first SRS resource needs to be randomly configured for the terminal device; otherwise, the first SRS Resource does not need to be randomly configured for the terminal device, and at this time, the SRS Resource of the terminal device is configured through a Radio Resource Control (RRC) signaling.

In this embodiment of the application, the second information indicates that the first SRS resource is randomly configured for the terminal device, that is, the randomizing enable switch is in an on state. At this time, the access network device determines the frequency domain comb position of the first SRS resource and/or the symbol position of the first SRS resource by using a pseudo-random formula. The pseudo-random formula is, for example: fx (Seq)_i,m,j,N_TC). The formula dynamically specifies a cell i, a user m and a transmission time slot number j of a first SRS resource, and the position of a starting symbol of the first SRS resource is

The starting combing position of the first SRS resource is

Therefore, in the embodiment of the present application, the symbol position of the first SRS resource is determined according to the cell ID (e.g. i) of the first cell and the ID (e.g. Seq) of the first SRS resource_i,m) The slot number (e.g., j) of the first SRS resource, and the number of SRS combs. Similarly, the number of symbols of the first SRS resource

The number of the first SRS can be determined according to a Received Signal Strength Indication (RSSI) of the first cell (e.g., cell i), the number of terminal devices of the first cell, and the number of comb points of the first SRS. For example, when the number of terminal devices of the first cell decreases, and the RSSI interferes withWhen the measured value is increased, the number of symbols allocated to the first SRS resource is dynamically increased.

In the above embodiment, the first SRS resource is determined from the SRS resource set by using the pseudo-random formula, so that the purpose of randomly allocating the SRS resource to the terminal device is achieved, and the terminal device does not need to transmit the SRS on the fixed SRS resource, thereby reducing the inter-cell SRS interference and improving the downlink system capacity.

Fig. 3 is a schematic diagram of a first SRS resource according to an embodiment of the present application. As shown in FIG. 3, the starting symbol of the first SRS resource is located at the position

The starting combing position of the first SRS resource is

Influenced by the cell ID of the first cell, the ID of the first SRS resource, the slot number of the first SRS resource, and the number of SRS comb points. Specifically, in fig. 3, for a specific terminal device, the cell ID of the first cell and the ID of the first SRS resource are determined, and when the SRS comb number is 4, the position of the start symbol of the first SRS resource in the slot 1 is the position of the start symbol of the first SRS resource

The starting combing position of the first SRS resource is

Occupies 2 symbols; in slot 2, the starting symbol of the first SRS resource is positioned at

The starting combing position of the first SRS resource is

The positions of the first SRS resources in slot 1 and slot 2 are different from each other, which occupies 2 symbols, as shown by the shaded portion in the figure.

Next, how to determine the SRS resource set in the above embodiment is described in detail.

In a possible implementation manner, before determining the first SRS resource from the SRS resource set, third information sent by the terminal device is further received, where the third information is used to indicate a precoding matrix indicator PMI and a signal to interference plus noise ratio SINR reported by the terminal device; determining whether to allocate the SRS resource set to the terminal equipment or not according to the PMI and the SINR; when the SRS resources are distributed to the terminal equipment, determining the priority of the terminal equipment; and determining the SRS resource set corresponding to the priority according to the priority.

Specifically, the terminal device reports third information to the access network device, where the third information includes a Precoding Matrix Indicator (PMI), a Signal to Interference Noise Ratio (SINR), a Received Signal Strength Indicator (RSSI), doppler measurement, and the like. And after receiving the third information, the access network equipment determines whether to allocate an SRS resource set to the terminal equipment. For example, when the third information indicates that the terminal device reports the PMI and the SINR sent by the terminal device exceeds a preset threshold, the terminal device is not allocated with an SRS resource set, or the terminal device is allocated with an SRS resource set, where the SRS resource set is an empty set; and when the third information indicates that the terminal equipment does not report the PMI, or the SINR sent by the terminal equipment does not exceed a preset threshold, allocating the SRS resource set which is not empty to the terminal equipment. The reason why the terminal device does not report the PMI may be that the access network device does not send a Channel State Information-Reference Signal (CSI-RS) to the terminal, or that the size of the feedback Information sent by the terminal device to the access network device is limited, so that the PMI Information cannot be sent.

For a terminal device of a particular cell, such as a first cell, when the access network device determines to allocate the set of SRS resources for the terminal device, the terminal device reports a doppler measurement to the access network device via a modulation Reference Signal (DMRS). After receiving the Doppler measurement, the access network equipment obtains the moving speed of the terminal equipment in the first cell according to the Doppler measurement, and the unit is kilometer per hour (km/s), so that the priority of allocating SRS resource sets to the terminal equipment is determined according to the moving speed. Specifically, when the moving speed of the terminal device is lower than the preset threshold, the allocation priority of the terminal device is reduced, and the SRS resource set allocated to the terminal device contains fewer SRS resources. For example, only 1 SRS symbol is allocated, 1 comb is allocated, SRS period is elongated; and when the moving speed of the terminal equipment is not lower than the preset threshold, improving the allocation priority of the terminal equipment, wherein the SRS resource set allocated to the terminal equipment comprises more SRS resources. For example, 2 or 4 symbols are allocated, more combs are allocated, and the SRS period is shortened.

In addition, the first cell includes a plurality of terminal devices, and a plurality of terminal devices to which SRS resources need to be allocated. At this time, it is necessary to extract a guest (VIP) terminal device from the terminal device in the first cell, that is, to raise the allocation priority of the SRS resource of the VIP terminal device. In the extraction process, firstly, an average value of the SINR of the terminal devices in the first cell is determined, then, the terminal devices with the SINR lower than the average SINR value are determined, and the priority of SRS resource allocation of the terminal devices with the SINR lower than the average SINR value is improved. Or, presetting an SINR threshold, determining terminal devices with SINR lower than the SINR threshold, and improving the priority of SRS resource allocation of the terminal devices. In the process, the aim of flexibly allocating the SRS resource set to the terminal equipment is fulfilled.

In a possible implementation manner, before the first SRS resource is determined from the set of SRS resources of the sounding reference signal, the set of SRS resources is also determined according to a position of the terminal device in the first cell. In particular, see fig. 4.

Fig. 4 is a schematic diagram of a cell to which a method for SRS resource configuration provided in the embodiment of the present application is applied. As shown in fig. 4, each cell is identified by a regular hexagon, the coverage area of each cell is divided into an edge position and a non-edge position, the non-edge position is shown by a shaded portion in the figure, the edge position is shown by an area around the shaded portion, and the edge position is divided into 3 areas, such as an area a, an area B and an area C in the figure. When the terminal device is not located at the edge of the first cell, determining that the SRS resource set contains all SRS resources of the first cell; when the terminal device is located at the edge of the first cell, determining that the SRS resource set contains one third of all SRS resources of the first cell.

Taking the first cell as the middle cell in the figure as an example, when the terminal device is located at the position of the shaded portion, the SRS resource set allocated to the terminal device includes all SRS resources of the first cell, and when the terminal device is located in the area a, the area B, or the area C, the SRS resource set allocated to the terminal device includes one third of all SRS resources of the first cell. Assuming that the frequency domain resource of the first cell is 100M, the 100M is divided into three frequency domain bandwidths of 0-33M, 34-66M and 67-99M. The area A uses 0-33M bandwidth, the area B uses 34-66M bandwidth, and the area C uses 67-99M bandwidth.

In the method, the position covered by the first cell is divided into the edge position and the non-edge range position, so that the terminal equipment at the non-edge position in the first cell can be ensured to use all SRS resources of the first cell, and the terminal equipment at the edge position occupies one third of all SRS resources. In the process, the SRS resource can be flexibly allocated to the terminal equipment according to the position of the terminal equipment in the first cell.

In a possible implementation manner, before determining the first SRS resource from the SRS resource set, the access network device further determines whether reference signal received power, RSRP, of the terminal device in the second cell exceeds a preset threshold; and when the RSRP exceeds a preset threshold, deleting a third SRS resource from all SRS resources of the first cell, and taking the remaining SRS resource as a resource in the SRS resource set, wherein the third SRS resource is the same resource as the resource used by the terminal equipment of the second cell to send the SRS.

Specifically, when the access network device detects that Reference Signal Received Power (RSRP) of the terminal device in the second cell exceeds a preset threshold, the access network device actively backs off the SRS resource to avoid that the first SRS resource used by the terminal device in the first cell is the same as the SRS resource used by the terminal device when sending the SRS in the second cell. For example, the terminal device is located at a non-edge position of the first cell, and may use all SRS resources of the first cell, and when the terminal device backs off, the access network device deletes a third SRS resource from all the SRS resources, where the third SRS resource is a resource used when the terminal device transmits an SRS in the second cell; for another example, if the terminal device is located at the edge of the first cell and can use one third of all SRS resources of the first cell, during the backoff, the access network device deletes a third SRS resource from the one third SRS resource, where the third SRS resource is a resource used by the terminal device when transmitting SRS in the second cell. In the process, the terminal equipment is prevented from using the same SRS resource in different cells to cause interference through active avoidance.

It should be noted that, if the first cell SRS resource set is empty after the third SRS resource is deleted from all SRS resources of the first cell, the deletion process is not performed. That is to say, when all SRS resources of the first cell only include the third SRS resource, at this time, even if the access network device detects that the RSRP of the terminal device in the second cell exceeds the preset threshold, the access network device does not actively backoff the SRS resources. In this way, the situation that the first cell has no SRS resource available can be avoided.

Fig. 5 is a schematic structural diagram of a communication device according to an embodiment of the present application. The communication device according to the present embodiment may be the access network device described above, or may be a chip applied to the access network device. The communication device may be configured to perform the actions of the access network apparatus in the above method embodiments. As shown in fig. 5, the communication device 10 may include: a processing unit 11, a transmitting unit 12 and a receiving unit 13. Wherein the content of the first and second substances,

a processing unit 11, configured to determine a first SRS resource from a sounding reference signal SRS resource set, where the SRS resource set includes at least one SRS resource, the first SRS resource is a resource for a terminal device to send an SRS, a cell where the terminal device is located is a first cell, symbol positions and/or frequency-domain comb positions of the first SRS resource and a second SRS resource are different, the second SRS resource is an SRS resource used by a terminal device in a second cell, and the second cell is a different cell from the first cell;

A sending unit 12, configured to send first information to the terminal device, where the first information is used to indicate the first SRS resource;

a receiving unit 13, configured to receive an SRS sent by the terminal device on the first SRS resource.

In a feasible implementation manner, the processing unit 11 is specifically configured to determine a frequency domain combing position of the first SRS resource and/or a symbol position of the first SRS resource according to the cell identifier of the first cell, the SRS identifier of the terminal device, the slot number of the first cell, the SRS combing number of the terminal device, and second information; the second information is used for indicating whether the first SRS resource is randomly configured for the terminal equipment or not; determining the number of symbols required to be used by the terminal equipment for sending the SRS according to the received signal strength indication RSSI of the terminal equipment in the first cell, the number of the terminal equipment residing in the first cell, the number of SRS comb points of the terminal equipment and the second information; and determining the first SRS resource from the SRS resource set according to the frequency domain combing position of the first SRS resource and/or the symbol position of the first SRS resource, the symbol number information and the second information.

In a feasible implementation manner, the receiving unit 13 is further configured to receive third information sent by the terminal device before the processing unit 11 determines the first SRS resource from the SRS resource set, where the third information is used to indicate a precoding matrix indicator PMI and a signal to interference plus noise ratio SINR reported by the terminal device;

the processing unit 11 is further configured to determine whether to allocate the SRS resource set to the terminal device according to the PMI and the SINR; when the SRS resource is distributed to the terminal equipment, determining the priority of the terminal equipment; and determining the SRS resource set corresponding to the priority according to the priority.

In a possible implementation manner, when determining whether to allocate the SRS resource set to the terminal device according to the PMI and the SINR, the processing unit 11 is specifically configured to determine whether the receiving unit 13 receives the PMI sent by the terminal device and the SINR sent by the terminal device exceeds a preset threshold; when the receiving unit 13 receives the PMI sent by the terminal device and the SINR sent by the terminal device exceeds the preset threshold, it is determined that the SRS resource set is not allocated to the terminal device, or when the receiving unit 13 does not receive the PMI sent by the terminal device or the SINR sent by the terminal device does not exceed the preset threshold, it is determined that the SRS resource set is allocated to the terminal device and the SRS resource set is not empty.

In a possible implementation manner, before determining a first SRS resource from a set of SRS resources for sounding reference signals, the processing unit 11 is further configured to determine the set of SRS resources according to a position of the terminal device in the first cell.

In a possible implementation manner, when determining the SRS resource set according to the position of the terminal device in the first cell, the processing unit 11 is specifically configured to determine that the SRS resource set includes all SRS resources of the first cell when the terminal device is not located at the edge of the first cell; or, when the terminal device is located at the edge of the first cell, determining that the SRS resource set includes one third of all SRS resources of the first cell.

In a possible implementation manner, before determining the first SRS resource in the SRS resource set, the processing unit 11 is further configured to determine whether reference signal received power RSRP of the terminal device in the second cell exceeds a preset threshold; and when the RSRP exceeds a preset threshold, deleting a third SRS resource from the SRS resource set corresponding to the first cell, and taking the remaining SRS resource as a resource in the SRS resource set, wherein the third SRS resource is the same resource as a resource used by the terminal equipment of the second cell to transmit the SRS.

The communication apparatus provided in the embodiment of the present application may perform the actions of the access network device in the foregoing method embodiments, and the implementation principle and the technical effect are similar, which are not described herein again.

Fig. 6 is a schematic structural diagram of another communication device according to an embodiment of the present application. The communication device according to the present embodiment may be the terminal device described above, or may be a chip applied to a terminal device. The communication device can be used for executing the actions of the terminal equipment in the method embodiment. As shown in fig. 6, the communication device 20 may include: a receiving unit 21 and a transmitting unit 22. Wherein the content of the first and second substances,

a receiving unit 21, configured to receive first information sent by an access network device, where the first information is used to indicate a first sounding reference signal SRS resource, the first SRS resource is a resource for a terminal device to send an SRS, a cell where the terminal device is located is a first cell, an SRS resource set includes at least one SRS resource, the first SRS resource is one resource in the SRS resource set, symbol positions and/or frequency domain comb positions of the first SRS resource and a second SRS resource are different, the second SRS resource is an SRS resource used by the terminal device in a second cell, and the second cell is a cell different from the first cell;

A transmitting unit 22, configured to transmit an SRS on the first SRS resource.

In a feasible implementation manner, the sending unit 22 is further configured to send third information to the access network device before the receiving unit 21 receives the first information sent by the access network device, where the third information is used to indicate a precoding matrix indicator PMI and a signal to interference plus noise ratio SINR reported by the terminal device.

The communication apparatus provided in the embodiment of the present application may perform the actions of the terminal device in the foregoing method embodiments, and the implementation principle and the technical effect are similar, which are not described herein again.

It should be noted that the above receiving unit may be actually implemented as a receiver, and the transmitting unit may be actually implemented as a transmitter. The processing unit can be realized in the form of software called by the processing element; or may be implemented in hardware. For example, the processing unit may be a processing element separately set up, or may be implemented by being integrated into a chip of the apparatus, or may be stored in a memory of the apparatus in the form of program code, and a function of the processing unit may be called and executed by a processing element of the apparatus. In addition, all or part of the units can be integrated together or can be independently realized. The processing element described herein may be an integrated circuit having signal processing capabilities. In implementation, each step of the above method or each unit above may be implemented by an integrated logic circuit of hardware in a processor element or an instruction in the form of software.

For example, the above units may be one or more integrated circuits configured to implement the above methods, such as: one or more Application Specific Integrated Circuits (ASICs), or one or more microprocessors (DSPs), or one or more Field Programmable Gate Arrays (FPGAs), etc. For another example, when some of the above units are implemented in the form of a processing element scheduler code, the processing element may be a general-purpose processor, such as a Central Processing Unit (CPU) or other processor that can call the program code. As another example, these units may be integrated together and implemented in the form of a system-on-a-chip (SOC).

Fig. 7 is a schematic structural diagram of another communication device according to an embodiment of the present application. As shown in fig. 7, the communication device 30 may include: a processor 31 (e.g., CPU), a memory 32, a receiver 33, a transmitter 34; both the receiver 33 and the transmitter 34 are coupled to the processor 31, the processor 31 controlling the receiving action of the receiver 33, the processor 31 controlling the transmitting action of the transmitter 34; the memory 32 may include a random-access memory (RAM) and may further include a non-volatile memory (NVM), such as at least one disk memory, and the memory 32 may store various instructions for performing various processing functions and implementing the method steps of the present application. Optionally, the communication apparatus related to the present application may further include: a power supply 35, a communication bus 36, and a communication port 37. The receiver 33 and the transmitter 34 may be integrated in a transceiver of the communication device or may be separate transceiving antennas on the communication device. The communication bus 36 is used to implement communication connections between the elements. The communication port 37 is used for connection communication between the communication device and other peripherals.

In the embodiment of the present application, the memory 32 is used for storing computer executable program codes, and the program codes comprise instructions; when the processor 31 executes the instruction, the instruction causes the processor 31 of the communication apparatus to execute the processing action of the access network device in the foregoing method embodiment, cause the receiver 33 to execute the receiving action of the access network device in the foregoing method embodiment, and cause the transmitter 34 to execute the transmitting action of the access network device in the foregoing method embodiment, which has similar implementation principles and technical effects, and is not described again here.

Fig. 8 is a schematic structural diagram of another communication device according to an embodiment of the present application. As shown in fig. 8, the communication apparatus may include: a processor 41 (e.g., CPU), a memory 42, a receiver 43, a transmitter 44; both the receiver 43 and the transmitter 44 are coupled to the processor 41, the processor 41 controlling the receiving action of the receiver 43, the processor 41 controlling the transmitting action of the transmitter 44; the memory 42 may include a random-access memory (RAM) and a non-volatile memory (NVM), such as at least one disk memory, and the memory 42 may store various instructions for performing various processing functions and implementing the method steps of the present application. Optionally, the communication apparatus related to the present application may further include: a power supply 45, a communication bus 46, and a communication port 47. The receiver 43 and the transmitter 44 may be integrated in a transceiver of the communication device or may be separate transceiving antennas on the communication device. The communication bus 46 is used to enable communication connections between the elements. The communication port 47 is used for connection and communication between the communication device and other peripherals.

In the embodiment of the present application, the memory 42 is used for storing computer executable program codes, and the program codes include instructions; when the processor 41 executes the instruction, the instruction causes the processor 41 of the communication apparatus to execute the processing action of the terminal device in the foregoing method embodiment, cause the receiver 43 to execute the receiving action of the terminal device in the foregoing method embodiment, and cause the transmitter 44 to execute the transmitting action of the terminal device in the foregoing method embodiment, which has similar implementation principles and technical effects, and will not be described again here.

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

The term "plurality" herein refers to two or more. The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship; in the formula, the character "/" indicates that the preceding and following related objects are in a relationship of "division".

It is to be understood that the various numerical references referred to in the embodiments of the present application are merely for convenience of description and distinction and are not intended to limit the scope of the embodiments of the present application.

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

Claims

1. A method for resource allocation of Sounding Reference Signals (SRS), comprising:

determining a first SRS resource from a Sounding Reference Signal (SRS) resource set, wherein the SRS resource set comprises at least one SRS resource, the first SRS resource is a resource for sending an SRS by a terminal device, a cell where the terminal device is located is a first cell, symbol positions and/or frequency-domain comb positions of the first SRS resource and a second SRS resource are different, the second SRS resource is an SRS resource used by the terminal device in a second cell, and the second cell is different from the first cell;

Sending first information to the terminal equipment, wherein the first information is used for indicating the first SRS resource;

receiving an SRS sent by the terminal equipment on the first SRS resource;

before the determining the first SRS resource from the set of SRS resources of the sounding reference signal, the method further includes:

2. The method of claim 1, wherein the determining the first SRS resource from the set of SRS resources comprises:

Determining the number of symbols required to be used by the terminal equipment for sending the SRS according to the received signal strength indication RSSI of the terminal equipment in the first cell, the number of the terminal equipment residing in the first cell, the number of SRS comb points of the terminal equipment and the second information;

3. The method of claim 1, wherein the determining whether to allocate the set of SRS resources for the terminal device according to the PMI and the SINR comprises:

4. The method according to claim 1 or 2, wherein before determining the first SRS resource from the set of SRS resources, further comprising:

5. The method of claim 4, wherein the determining the set of SRS resources based on the location of the terminal device in the first cell comprises:

when the terminal device is not located at the edge of the first cell, determining that the SRS resource set contains all SRS resources of the first cell; alternatively, the first and second electrodes may be,

when the terminal equipment is located at the edge of the first cell, determining that the SRS resource set contains one third of all SRS resources of the first cell.

6. The method according to claim 1 or 2, wherein before determining the first SRS resource from the set of SRS resources, further comprising:

7. A method for resource allocation of Sounding Reference Signals (SRS), comprising:

transmitting an SRS on the first SRS resource;

before the receiving of the first information sent by the access network equipment, the method also comprises the following steps;

8. A communications apparatus, comprising:

a receiving unit, configured to receive an SRS sent by the terminal device on the first SRS resource;

the receiving unit is further configured to receive third information sent by the terminal device before the processing unit determines the first SRS resource from the SRS resource set, where the third information is used to indicate a precoding matrix indicator PMI and a signal to interference plus noise ratio SINR reported by the terminal device;

9. The apparatus of claim 8,

the processing unit is specifically configured to determine a frequency domain combing position of the first SRS resource and/or a symbol position of the first SRS resource according to the cell identifier of the first cell, the SRS identifier of the terminal device, the slot number of the first cell, the SRS combing number of the terminal device, and second information; the second information is used for indicating whether the first SRS resource is randomly configured for the terminal equipment or not; determining the number of symbols required to be used by the terminal equipment for sending the SRS according to the received signal strength indication RSSI of the terminal equipment in the first cell, the number of the terminal equipment residing in the first cell, the number of SRS comb points of the terminal equipment and the second information; and determining the first SRS resource from the SRS resource set according to the frequency domain combing position of the first SRS resource and/or the symbol position of the first SRS resource, the symbol number information and the second information.

10. The apparatus of claim 8,

the processing unit, when determining whether to allocate the SRS resource set to the terminal device according to the PMI and the SINR, is specifically configured to determine whether the PMI sent by the terminal device is received by the receiving unit and the SINR sent by the terminal device exceeds a preset threshold; when the receiving unit receives the PMI sent by the terminal equipment and the SINR sent by the terminal equipment exceeds the preset threshold, determining that the SRS resource set is not allocated to the terminal equipment, or when the receiving unit does not receive the PMI sent by the terminal equipment or the SINR sent by the terminal equipment does not exceed the preset threshold, determining that the SRS resource set is allocated to the terminal equipment and the SRS resource set is not empty.

11. The apparatus according to claim 8 or 9,

the processing unit is further configured to determine the SRS resource set according to a position of the terminal device in the first cell before determining the first SRS resource from the SRS resource set.

12. The apparatus of claim 11,

the processing unit, when determining the SRS resource set according to the position of the terminal device in the first cell, is specifically configured to determine that the SRS resource set includes all SRS resources of the first cell when the terminal device is not located at the edge of the first cell; or, when the terminal device is located at the edge of the first cell, determining that the SRS resource set includes one third of all SRS resources of the first cell.

13. The apparatus according to claim 8 or 9,

the processing unit is further configured to determine whether reference signal received power, RSRP, of the terminal device in the second cell exceeds a preset threshold before determining the first SRS resource in the SRS resource set; and when the RSRP exceeds a preset threshold, deleting a third SRS resource from the SRS resource set corresponding to the first cell, and taking the remaining SRS resource as a resource in the SRS resource set, wherein the third SRS resource is the same resource as a resource used by the terminal equipment of the second cell to transmit the SRS.

14. A communications apparatus, comprising:

a transmitting unit, configured to transmit an SRS on the first SRS resource;

the sending unit is further configured to send third information to the access network device before the receiving unit receives the first information sent by the access network device, where the third information is used to indicate a precoding matrix indicator PMI and a signal to interference plus noise ratio SINR reported by the terminal device.