WO2024235112A1 - Communication method and communication apparatus - Google Patents

Abstract

A communication method and a communication apparatus. The method comprises: a terminal receiving first indication information and/or second indication information from a network device, wherein the first indication information is used for indicating a first timing parameter, the first timing parameter is used for acquiring time resource synchronization with a second terminal, the second indication information is used for indicating a frequency hopping parameter, the frequency hopping parameter is a frequency hopping parameter which is used by a signal sent by the second terminal, and the first indication information and the second indication information are used for a first terminal to eliminate signal interference between the first terminal and the second terminal. Therefore, a terminal can acquire an interference signal from a second terminal, and inter-terminal interference in a downlink signal can be reduced, thereby improving the reliability of downlink transmission.

Description

Communication method and communication device

This application claims the priority of the Chinese patent application filed with the China Patent Office on May 12, 2023, with application number 202310541244.X and application name “Communication Method and Communication Device”, the entire contents of which are incorporated by reference in this application.

Technical Field

The present application relates to the field of communications, and more specifically, to a communication method and a communication device.

Background Art

The duplex modes for communication equipment include frequency division duplex (FDD) and time division duplex (TDD). In addition, in order to solve the problem that the TDD mode cannot simultaneously perform uplink and downlink transmission, which increases the transmission delay, a subband full duplex (SBFD) mode is currently proposed. Based on the TDD mode, this mode configures part of the subbands in the frequency domain of some time domain resources (such as part of the symbol or part of the time slot) as uplink resources and part of the subbands as downlink resources, so that the terminal and the network equipment can simultaneously perform uplink and downlink in different subbands.

In a communication system, when terminals communicate in TDD and SBFD modes, the uplink and downlink resource configurations of different terminals may be different. Then, when one terminal is receiving a downlink signal, if another terminal is sending an uplink signal at the same time, and the two terminals are close to each other, the uplink signal may interfere with the terminal receiving the downlink signal. This interference can be called cross-link interference (CLI) between terminals. At present, the purpose of avoiding interference can be achieved by scheduling so that the interfering terminal does not send an uplink signal when the interfered terminal receives a downlink signal. However, this method reduces the uplink transmission timeliness of the interfering terminal and wastes resources. How to eliminate the interference of the uplink signal in the downlink received signal by the interfered terminal without suppressing the interfering terminal from sending the uplink signal has become a problem that needs to be solved at present.

Summary of the invention

The embodiments of the present application provide a communication method and a communication device, which can improve the reliability of downlink transmission.

In a first aspect, a communication method is provided, which can be executed by a terminal or a module (such as a chip) configured in (or used for) a terminal. The following description is given by taking the first terminal executing the method as an example.

The method includes: a first terminal receives first indication information and/or second indication information from a network device, the first indication information is used to indicate a first timing parameter, the second indication information is used to indicate a frequency hopping parameter, the first timing parameter is used to obtain time resource synchronization with a second terminal, and the frequency hopping parameter is a frequency hopping parameter used by a signal sent by the second terminal. The first indication information and the second indication information are used by the first terminal to eliminate signal interference between the first terminal and the second terminal.

According to the above scheme, the first terminal obtains auxiliary information (including the above first indication information and/or second indication information) from the network device, so that the first terminal can reconstruct the interference signal from the second terminal based on the auxiliary information. Without suppressing the interference terminal from sending uplink signals, the first terminal can reduce the interference in the downlink received signal based on the reconstructed interference signal, improve the signal to interference plus noise ratio (SINR) of the received signal, increase the probability of the terminal successfully demodulating the received signal, and improve the reliability of downlink transmission. And because this method does not need to suppress the interference terminal from sending uplink signals, it can reduce resource waste and improve resource utilization.

In combination with the first aspect, in some implementations of the first aspect, the method further includes: the first terminal determines an interference signal from the second terminal according to the first indication information and/or the second indication information. The first terminal obtains data in the first signal according to the interference signal and the first signal from the network device.

According to the above scheme, the first terminal can reconstruct the interference signal of the second terminal through the auxiliary information, and eliminate the interference signal of the second terminal in the received signal obtained by receiving the downlink signal, so as to accurately obtain the downlink data in the received signal.

In combination with the first aspect, in some implementations of the first aspect, the method further includes: the first terminal sends third indication information to the network device, the third indication information is used to indicate the number of terminals P supported by the first terminal for simultaneously eliminating interference from multiple terminals, the first indication information and the second indication information indicate parameters of Q second terminals, Q is less than or equal to P, and P and Q are positive integers. And, the first terminal determines the interference signal from the second terminal according to the first indication information and/or the second indication information, including: the first terminal determines the interference signal from the Q second terminals according to the first indication information and/or the second indication information.

According to the above scheme, the first terminal can report the interference elimination capability supported by the first terminal to the network device, including the number of terminals that support simultaneous elimination of interference from multiple terminals. This enables the network device to provide the terminal with auxiliary information of Q terminals that meet the terminal interference elimination capability. The first terminal can determine the interference signals of the Q terminals based on the auxiliary information provided by the network device, so as to eliminate the interference signals of the Q terminals in the downlink signal and accurately obtain the downlink data.

In combination with the first aspect, in certain implementations of the first aspect, the third indication information is also used to indicate an interference elimination method for a downlink signal supported by the first terminal, and the interference elimination method includes a method for eliminating an interference signal from the terminal in the downlink signal.

According to the above solution, the first terminal can report the interference elimination method supported by the first terminal to the network device, so that the network device can provide the terminal with corresponding interference elimination configuration information based on the interference elimination method supported by the first terminal.

In combination with the first aspect, in certain implementations of the first aspect, the first indication information and the second indication information indicate parameters of Q second terminals, and the first terminal determines the interference signal from the second terminal based on the first indication information and/or the second indication information, including: the first terminal determines the interference signal from the K second terminals based on the first indication information and/or the second indication information, the Q second terminals include the K second terminals, K is less than or equal to Q, and K and Q are positive integers.

In combination with the first aspect, in certain implementations of the first aspect, the method also includes: the first terminal determines the K second terminals among the Q second terminals based on the interference strength of the Q second terminals and/or the number of terminals P that support simultaneous elimination of interference from multiple terminals, where P is a positive integer and K is less than or equal to P.

According to the above scheme, the network device can provide auxiliary information corresponding to Q second terminals for the first terminal. The first terminal can select some or all of the Q second terminals as interference terminals based on the measured interference strength and/or the interference elimination capability of the first terminal, and determine the interference signal, thereby eliminating the interference between terminals in the downlink received signal.

In combination with the first aspect, in some implementations of the first aspect, the method also includes: the first terminal receives first configuration information from the network device, the first configuration information is used to configure one or more candidate timing parameters, and the first timing parameter is one of the one or more candidate timing parameters.

Exemplarily, the first indication information includes an identifier of a first timing parameter.

According to the above solution, the network device can configure one or more timing parameters for the first terminal, and the first indication information only needs to include an identifier indicating the first timing parameter to notify the first terminal of the timing parameter corresponding to the second terminal. The first indication information does not need to include the timing parameter itself, which can reduce the signaling overhead of the first indication information.

In combination with the first aspect, in certain implementations of the first aspect, the first configuration information is RRC signaling, and the first indication information is media access control MAC control element CE signaling, or downlink control information DCI.

In combination with the first aspect, in some implementations of the first aspect, the second indication information is further used to indicate the following one or more scheduling parameters:

Time domain resource allocation parameters, frequency domain resource allocation parameters, number of transmission layers, precoding parameters, modulation and coding methods or frequency hopping parameters.

According to the above solution, the auxiliary information provided by the network device to the first terminal includes the scheduling parameters of the second terminal, so that the first terminal can obtain the signal from the second terminal based on the scheduling parameters.

In combination with the first aspect, in certain implementations of the first aspect, the method also includes: the first terminal receives second configuration information from the network device, the second configuration information is used to configure a candidate parameter set of at least one scheduling parameter, and a first scheduling parameter among the one or more scheduling parameters is one of the candidate parameter sets.

According to the above scheme, the network device can configure a candidate parameter set of at least one scheduling parameter among multiple scheduling parameters for the first terminal, so that the network device can notify the second terminal to adopt the scheduling parameter by means of the second indication information including an identifier of a candidate parameter of the scheduling parameter. The second indication information does not need to include the scheduling parameter itself, which can reduce the signaling overhead of the second indication information.

In a second aspect, a communication method is provided, which can be executed by a network device or a module (such as a chip) configured in (or used for) a network device. The following description will be made by taking a network device as an example.

The method includes: a network device sends first indication information and/or second indication information to a first terminal, the first indication information is used to indicate a first timing parameter, the second indication information is used to indicate a frequency hopping parameter, the timing parameter is used to obtain time resource synchronization with a second terminal, and the frequency hopping parameter is a frequency hopping parameter used by a signal sent by the second terminal. The first indication information and the second indication information are used by the first terminal to eliminate signal interference between the first terminal and the second terminal.

In combination with the second aspect, in some implementations of the second aspect, the method further includes: the network device receives third indication information from the first terminal, the third indication information is used to indicate the number of terminals P supported by the first terminal for simultaneously eliminating interference from multiple terminals, the first indication information and the second indication information indicate parameters of Q second terminals, Q is less than or equal to P, P, Q is a positive integer.

In combination with the second aspect, in certain implementations of the second aspect, the third indication information is also used to indicate an interference elimination method for a downlink signal supported by the first terminal, and the interference elimination method includes a method for eliminating an interference signal from the terminal in the downlink signal.

In combination with the second aspect, in some implementations of the second aspect, the method also includes: the network device sends first configuration information to the first terminal, the first configuration information is used to configure one or more candidate timing parameters, and the first timing parameter is one of the one or more candidate timing parameters.

In combination with the second aspect, in certain implementations of the second aspect, the first configuration information is RRC signaling, and the first indication information is media access control MAC control element CE signaling, or downlink control information DCI.

In conjunction with the second aspect, in some implementations of the second aspect, the second indication information is further used to indicate the following one or more scheduling parameters:

Time domain resource allocation parameters, frequency domain resource allocation parameters, number of transmission layers, precoding parameters, modulation and coding methods or frequency hopping parameters.

In combination with the second aspect, in certain implementations of the second aspect, the method also includes: the network device sends second configuration information to the first terminal, the second configuration information is used to configure a candidate parameter set of at least one scheduling parameter, and the first scheduling parameter among the one or more scheduling parameters is one of the candidate parameter sets.

In combination with the second aspect, in some implementations of the second aspect, the method further includes: the network device receiving third configuration information from the second network device, where the third configuration information is used to indicate one or more of the following:

The first timing parameter, the frequency hopping parameter, the scheduling parameter of the second terminal, the reference signal configuration information of the second terminal, the capability information of the second terminal or the subcarrier spacing adopted by the second terminal.

In a third aspect, a communication device is provided. In one design, the device may include a module corresponding to the method/operation/step/action described in the first aspect or any one of the embodiments of the first aspect. The module may be a hardware circuit, or software, or a combination of a hardware circuit and software. In one design, the device includes: a transceiver unit, used to receive first indication information and/or second indication information from a network device, the first indication information is used to indicate a first timing parameter, the second indication information is used to indicate a frequency hopping parameter, the first timing parameter is used to obtain time resource synchronization with a second terminal, and the frequency hopping parameter is a frequency hopping parameter used by a signal sent by the second terminal. The first indication information and the second indication information are used by the first terminal to eliminate signal interference between the first terminal and the second terminal. Optionally, the device also includes a processing unit, the processing unit is used to determine the first timing parameter according to the first indication information, or the processing unit is used to determine the frequency hopping parameter according to the second indication information.

In conjunction with the third aspect, in some implementations of the third aspect, the processing unit is further configured to determine an interference signal from the second terminal according to the first indication information and/or the second indication information. And the processing unit is further configured to obtain data in the first signal according to the interference signal and the first signal from the network device.

In combination with the third aspect, in some implementations of the third aspect, the transceiver unit is further configured to send third indication information to the network device, the third indication information being used to indicate the number of terminals P supported by the first terminal for simultaneously eliminating interference from multiple terminals, the first indication information and the second indication information indicating parameters of Q second terminals, Q being less than or equal to P, and P and Q being positive integers. The processing unit is specifically configured to determine interference signals from the Q second terminals according to the first indication information and/or the second indication information.

In combination with the third aspect, in certain implementations of the third aspect, the third indication information is also used to indicate an interference elimination method for a downlink signal supported by the first terminal, and the interference elimination method includes a method for eliminating an interference signal from the terminal in the downlink signal.

In combination with the third aspect, in certain implementations of the third aspect, the first indication information and the second indication information indicate parameters of Q second terminals, and the processing unit is specifically used to determine the interference signals from the K second terminals based on the first indication information and/or the second indication information, the Q second terminals include the K second terminals, K is less than or equal to Q, and K and Q are positive integers.

In combination with the third aspect, in certain implementations of the third aspect, the processing unit is specifically used to determine the K second terminals among the Q second terminals based on the interference strength of the Q second terminals and/or the number of terminals P that support simultaneous elimination of interference from multiple terminals, where P is a positive integer and K is less than or equal to P.

In combination with the third aspect, in certain implementations of the third aspect, the transceiver unit is specifically used to receive first configuration information from the network device, the first configuration information is used to configure one or more candidate timing parameters, and the first timing parameter is one of the one or more candidate timing parameters.

In combination with the third aspect, in certain implementations of the third aspect, the first configuration information is RRC signaling, and the first indication information is media access control MAC control element CE signaling, or downlink control information DCI.

In combination with the third aspect, in some implementations of the third aspect, the second indication information is further used to indicate the following one or more scheduling parameters:

Time domain resource allocation parameters, frequency domain resource allocation parameters, number of transmission layers, precoding parameters, modulation and coding methods or frequency hopping parameters.

In combination with the third aspect, in certain implementations of the third aspect, the transceiver unit is also used to receive second configuration information from the network device, the second configuration information being used to configure a candidate parameter set of at least one scheduling parameter, and a first scheduling parameter among the one or more scheduling parameters being one of the candidate parameter sets.

In a fourth aspect, a communication device is provided. In one design, the device may include a module corresponding to the method/operation/step/action described in the second aspect or any one of the embodiments of the second aspect. The module may be a hardware circuit, or software, or a combination of a hardware circuit and software. In one design, the device includes: a processing unit, used to determine first indication information and/or second indication information, the first indication information is used to indicate a first timing parameter, the second indication information is used to indicate a frequency hopping parameter, the timing parameter is used to obtain time resource synchronization with a second terminal, the frequency hopping parameter is a frequency hopping parameter used by a signal sent by the second terminal, wherein the first indication information and the second indication information are used by the first terminal to eliminate signal interference between the first terminal and the second terminal. A transceiver unit is used to send the first indication information and/or the second indication information to the first terminal.

In combination with the fourth aspect, in certain implementations of the fourth aspect, the transceiver unit is used to receive third indication information from the first terminal, the third indication information is used to indicate the number P of terminals supported by the first terminal for simultaneously eliminating interference from multiple terminals, the first indication information and the second indication information indicate parameters of Q second terminals, Q is less than or equal to P, and P and Q are positive integers.

In combination with the fourth aspect, in certain implementations of the fourth aspect, the third indication information is also used to indicate an interference elimination method for a downlink signal supported by the first terminal, and the interference elimination method includes a method for eliminating an interference signal from the terminal in the downlink signal.

In combination with the fourth aspect, in certain implementations of the fourth aspect, the transceiver unit is further used to send first configuration information to the first terminal, the first configuration information is used to configure one or more candidate timing parameters, and the first timing parameter is one of the one or more candidate timing parameters.

In combination with the fourth aspect, in certain implementations of the fourth aspect, the first configuration information is RRC signaling, and the first indication information is media access control MAC control element CE signaling, or downlink control information DCI.

In combination with the fourth aspect, in some implementations of the fourth aspect, the second indication information is further used to indicate the following one or more scheduling parameters:

Time domain resource allocation parameters, frequency domain resource allocation parameters, number of transmission layers, precoding parameters, modulation and coding methods or frequency hopping parameters.

In combination with the fourth aspect, in certain implementations of the fourth aspect, the transceiver unit is also used to send second configuration information to the first terminal, and the second configuration information is used to configure a candidate parameter set of at least one scheduling parameter, and a first scheduling parameter among the one or more scheduling parameters is one of the candidate parameter sets.

In combination with the fourth aspect, in some implementations of the fourth aspect, the transceiver unit is further used to receive third configuration information from the second network device, where the third configuration information is used to indicate one or more of the following:

The first timing parameter, the frequency hopping parameter, the scheduling parameter of the second terminal, the reference signal configuration information of the second terminal, the capability information of the second terminal or the subcarrier spacing adopted by the second terminal.

In a fifth aspect, a communication device is provided, including a processor. The processor can implement the method in the first aspect or the second aspect and any possible implementation manner of the first aspect or the second aspect.

Optionally, the communication device also includes a memory, and the processor is coupled to the memory and can be used to execute instructions in the memory to implement the method in the above-mentioned first aspect or second aspect and any possible implementation manner of the first aspect or second aspect.

Optionally, the communication device further comprises a communication interface, and the processor is coupled to the communication interface. In the embodiment of the present application, the communication interface may be a transceiver, a pin, a circuit, a bus, a module or other types of communication interfaces, without limitation.

In one implementation, the communication device is a communication equipment (such as a terminal device or an access network device). When the communication device is a communication equipment, the communication interface may be a transceiver, or an input/output interface.

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

Optionally, the transceiver may be a transceiver circuit. Optionally, the input/output interface may be an input/output circuit.

In a sixth aspect, a processor is provided, comprising: an input circuit, an output circuit, and a processing circuit. The processing circuit is used to receive a signal through the input circuit and transmit a signal through the output circuit, so that the processor executes the first aspect or the second aspect and the first aspect. The method in any possible implementation of the first aspect or the second aspect.

In the specific implementation process, the processor can be one or more chips, the input circuit can be an input pin, the output circuit can be an output pin, and the processing circuit can be a transistor, a gate circuit, a trigger, and various logic circuits. The input signal received by the input circuit can be, for example, but not limited to, received and input by a receiver, and the signal output by the output circuit can be, for example, but not limited to, output to a transmitter and transmitted by the transmitter, and the input circuit and the output circuit can be the same circuit, which is used as an input circuit and an output circuit at different times. The embodiments of the present application do not limit the specific implementation methods of the processor and various circuits.

In the seventh aspect, a computer program product is provided, which includes: a computer program (also referred to as code, or instruction), which, when executed, enables a computer to execute the method in the above-mentioned first aspect or second aspect and any possible implementation manner of the first aspect or second aspect.

In an eighth aspect, a computer-readable storage medium is provided, which stores a computer program (also referred to as code, or instructions). When the computer-readable storage medium is run on a computer, the computer executes the method in the above-mentioned first aspect or second aspect and any possible implementation manner of the first aspect or second aspect.

In a ninth aspect, a communication system is provided, comprising at least one communication device provided in the third aspect and at least one communication device provided in the fourth aspect. Optionally, the communication system further comprises the aforementioned at least one second terminal.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic architecture diagram of a communication system applicable to an embodiment of the present application;

FIG2 is a schematic diagram of a CLI in a TDD manner provided by the present application;

FIG3 is a schematic diagram of uplink and downlink resources of the SBFD method provided by the present application;

FIG4 is a schematic diagram of a CLI of the SBFD method provided by the present application;

FIG5 is a schematic flow chart of a communication method provided by the present application;

FIG6 is a schematic diagram of the format of the first indication information provided by the present application;

FIG7 is another schematic diagram of the format of the first indication information provided by the present application;

FIG8 is a schematic diagram of the format of the second indication information provided by the present application;

FIG9 is another schematic flow chart of the communication method provided by the present application;

FIG10 is a schematic block diagram of an example of a communication device provided in an embodiment of the present application;

FIG. 11 is a schematic structural diagram of another example of a communication device provided in an embodiment of the present application.

DETAILED DESCRIPTION

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

In the embodiment of the present application, "/" can indicate that the objects associated before and after are in an "or" relationship, for example, A/B can indicate A or B; "and/or" can be used to describe that there are three relationships between the associated objects, for example, A and/or B can indicate: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. In order to facilitate the description of the technical solution of the embodiment of the present application, in the embodiment of the present application, the words "first" and "second" can be used to distinguish. The words "first" and "second" do not limit the quantity and execution order, and the words "first" and "second" do not necessarily limit the difference. In the embodiment of the present application, the words "exemplary" or "for example" are used to indicate examples, illustrations or explanations, and any embodiment or design described as "exemplary" or "for example" should not be interpreted as being more preferred or more advantageous than other embodiments or design. The use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way for easy understanding. In the embodiments of the present application, at least one (kind) can also be described as one (kind) or more (kinds), and more (kinds) can be two (kinds), three (kinds), four (kinds) or more (kinds), and the present application does not impose any limitation.

FIG. 1 is a schematic diagram showing a possible, non-limiting system. As shown in FIG. 1 , the communication system 10 includes a radio access network (RAN) 100 and a core network (CN) 200. The RAN 100 includes at least one RAN node (such as 110a and 110b in FIG. 1 , collectively referred to as 110) and at least one terminal (such as 120a-120j in FIG. 1 , collectively referred to as 120). The RAN 100 may also include other RAN nodes, such as wireless relay equipment and/or wireless backhaul equipment (not shown in FIG. 1 ). The terminal 120 is connected to the RAN node 110 in a wireless manner. The RAN node 110 is connected to the core network 200 in a wireless or wired manner. The core network device in the core network 200 and the RAN node 110 in the RAN 100 may be different physical devices, or may be the same physical device that integrates the core network logical function and the radio access network logical function.

RAN 100 may be a cellular system related to the 3rd Generation Partnership Project (3GPP). For example, a 4G or 5G mobile communication system, or a future-oriented evolution system (e.g., a 6G mobile communication system). RAN 100 may also be an open access network (open RAN, O-RAN or ORAN), a cloud radio access network (cloud radio access network, CRAN), or a wireless fidelity (wireless fidelity, WiFi) system. RAN 100 may also be a communication system that integrates two or more of the above systems.

The RAN node 110, which may also be sometimes referred to as an access network device, a RAN entity or an access node, etc., constitutes a part of the communication system to help the terminal achieve wireless access. The multiple RAN nodes 110 in the communication system 10 may be nodes of the same type or nodes of different types. In some scenarios, the roles of the RAN node 110 and the terminal 120 are relative. For example, the network element 120i in FIG. 1 may be a helicopter or a drone, which may be configured as a mobile base station. For the terminal 120j that accesses the RAN 100 through the network element 120i, the network element 120i is a base station; but for the base station 110a, the network element 120i is a terminal. The RAN node 110 and the terminal 120 are sometimes referred to as communication devices. For example, the network elements 110a and 110b in FIG. 1 may be understood as communication devices with base station functions, and the network elements 120a-120j may be understood as communication devices with terminal functions.

In a possible scenario, the RAN node may be a base station, an evolved NodeB (eNodeB), an access point (AP), a transmission reception point (TRP), a next generation NodeB (gNB), a next generation base station in a 6th generation (6G) mobile communication system, a base station in a future mobile communication system, or an access node in a WiFi system. The RAN node may be a macro base station (such as 110a in FIG. 1 ), a micro base station or an indoor station (such as 110b in FIG. 1 ), a relay node or a donor node, or a wireless controller in a CRAN scenario. Optionally, the RAN node may also be a server, a wearable device, a vehicle or an onboard device, etc. For example, the access network device in the vehicle to everything (V2X) technology may be a road side unit (RSU). All or part of the functions of the RAN node in the present application may also be implemented by software functions running on hardware, or by virtualization functions instantiated on a platform (such as a cloud platform). The RAN node in the present application may also be a logical node, a logical module or software that can implement all or part of the RAN node functions.

In another possible scenario, multiple RAN nodes collaborate to assist the terminal in achieving wireless access, and different RAN nodes implement part of the functions of the base station respectively. For example, the RAN node can be a central unit (CU), a distributed unit (DU), a CU-control plane (CP), a CU-user plane (UP), or a radio unit (RU). The CU and DU can be set separately, or can also be included in the same network element, such as a baseband unit (BBU). The RU can be included in a radio frequency device or a radio frequency unit, such as a remote radio unit (RRU), an active antenna unit (AAU) or a remote radio head (RRH).

In different systems, CU (or CU-CP and CU-UP), DU or RU may also have different names, but those skilled in the art can understand their meanings. For example, in the ORAN system, CU may also be called O-CU (open CU), DU may also be called O-DU, CU-CP may also be called O-CU-CP, CU-UP may also be called O-CU-UP, and RU may also be called O-RU. For the convenience of description, CU, CU-CP, CU-UP, DU and RU are described as examples in this application. Any unit of CU (or CU-CP, CU-UP), DU and RU in this application may be implemented by a software module, a hardware module, or a combination of a software module and a hardware module.

The terminal may also be referred to as a terminal device, user equipment (UE), mobile station, mobile terminal, etc. The terminal can be widely used in various scenarios, for example, device-to-device (D2D), vehicle-to-everything (V2X) communication, machine-type communication (MTC), Internet of Things (IOT), virtual reality, augmented reality, industrial control, automatic driving, telemedicine, smart grid, smart furniture, smart office, smart wear, smart transportation, smart city, etc. The terminal may be a mobile phone, a tablet computer, a computer with wireless transceiver function, a wearable device, a vehicle, a drone, a helicopter, an airplane, a ship, a robot, a mechanical arm, a smart home device, etc. The embodiments of the present application do not limit the device form of the terminal.

It should be understood that in this application, "sending information/data to... (such as a terminal)" can be understood as the destination of the information being the terminal. It can include sending information/data directly or indirectly to the terminal. "Receiving information/data from... (such as a terminal)" can be understood as the source of the information being the terminal, which can include receiving information/data directly or indirectly from the terminal. The information/data may be subjected to necessary processing between the source and destination of the information/data transmission, such as format changes, etc., but the destination can understand the valid information/data from the source. Similar expressions in this application can be understood similarly and will not be repeated here.

In this application, "sending information/data" only refers to the direction of information/data transmission, including direct transmission via the air interface and indirect transmission via the air interface by the processing unit, and "sending" can also be understood as the "output" of the chip interface. "Receiving information/data" only refers to the direction of information/data transmission, including direct reception via the air interface and indirect reception via the air interface by the processing unit, and "receiving" can also be understood as the "input" of the chip interface.

It is understood that the present application uses the network device and the terminal as an example to illustrate the execution subject of the interaction, but the present application is not limited to The execution subject of the interactive diagram. The network device may be the RAN node described above, or the network device includes one or more RAN nodes described above. The functions/steps implemented by the network device in the method of the present application may also be implemented by a module (such as a chip, a chip system, or a processor) applied to the network device, or may be implemented by a logical node, a logical module, or software that can implement all or part of the network device. The terminal in the method of the present application may also be a module (such as a chip, a chip system, or a processor) applied to the terminal, or may be a logical node, a logical module, or software that can implement all or part of the terminal functions.

The following is an introduction to the relevant technologies and terms involved in the embodiments of the present application.

1. TDD CLI

In TDD mode, the center frequency of the uplink bandwidth and the downlink bandwidth are the same, but the uplink signal and the downlink signal are transmitted at different times. In the mobile communication system, the network equipment will configure the frame format for the terminal so that the network equipment and the terminal can reach a consensus on the uplink resources used to carry the uplink signal and the downlink resources used to carry the downlink signal in the communication resources.

For terminals that are close in distance and have different uplink and downlink resource configurations, when one terminal is receiving a downlink signal, if another terminal is sending an uplink signal, the uplink signal of the terminal may cause interference to the terminal receiving the downlink signal. This interference can be called CLI between terminals.

For example, as shown in FIG2 , time slots 0 to 2 between network device 1 and terminal 1 are downlink time slots, time slot 3 is a flexible time slot, the flexible time slot may include a time interval for uplink and downlink conversion, and the flexible time slot may also include downlink resources and/or uplink resources, and time slot 4 is an uplink time slot. If terminal 1 is at the edge of the cell of network device 1, and there is terminal 2 at the edge of the cell of network device 2 nearby, time slot 0 between network device 2 and terminal 2 is a downlink time slot, time slot 1 is a flexible time slot, and time slot 2 to time slot 4 are uplink time slots. If network device 1 sends a downlink signal to terminal 1 in time slot 2, and terminal 2 sends an uplink signal to network device 2 in time slot 2, the uplink signal sent by terminal 2 will interfere with the downlink signal of terminal 1. Specifically, when receiving the downlink signal, the terminal may simultaneously receive the uplink signal sent by terminal 2. Since terminal 1 is at the edge of the cell, the downlink signal strength is weak at this time, and the interference of the uplink signal of terminal 2 will reduce the probability of successful decoding of the downlink signal by terminal 1.

2. SBFD CLI

Since uplink and downlink transmission cannot be performed simultaneously in the TDD mode, this leads to increased transmission delay. In order to solve the delay problem of the TDD mode, the SBFD mode is currently being discussed. For example, as shown in Figure 3, based on the TDD mode, this mode configures some sub-bands in the frequency domain of some time domain resources (such as some symbols or some time slots) as uplink resources and some sub-bands as downlink resources, so that the terminal and the network device can perform uplink and downlink in different sub-bands at the same time.

As shown in FIG. 4 , for a terminal using SBFD, uplink transmission on an uplink subband may cause signal leakage on an adjacent downlink subband, which may cause interference between subbands of signals of different terminals. This interference can also be called CLI between terminals.

At present, CLI between terminals can avoid interference between terminals by means of collaborative scheduling. Specifically, for two terminals with interference, when the interfered terminal performs downlink transmission, the interfering terminal is not scheduled for uplink transmission, thereby avoiding interference. However, this method wastes system resources to a certain extent, and it is difficult to quickly schedule, and it affects the uplink transmission timeliness of the interfering terminal. In addition, interference isolation can be achieved by adjusting the beam direction of the interfered terminal and the interfering terminal. For example, the interfered terminal or the interfering terminal can be scheduled not to use the best beam that generates interference for signal transmission. However, this method will affect the signal transmission performance and reduce the reliability of signal transmission. It is difficult or impossible to achieve for terminals with limited beamforming capabilities (such as terminals with a small number of antennas).

The embodiment of the present application proposes that the network device provides auxiliary information to the interfered terminal, so that the interfered terminal can reconstruct the interference signal of the interfering terminal based on the auxiliary information, thereby eliminating the interference signal of the interfering terminal in the downlink signal. This can achieve CLI elimination between terminals without suppressing the interfering terminal from sending uplink signals, and can improve resource utilization.

FIG5 is a schematic flow chart of a communication method 500 provided in an embodiment of the present application. In the method 500, the first terminal is an interfered terminal, the second terminal is an interfering terminal, and the network device is a network device that establishes a communication connection with the first terminal. The method 500 includes but is not limited to the following steps:

S501, the network device sends first indication information and/or second indication information to the first terminal, the first indication information is used to indicate a first timing parameter, and the first timing parameter is used to obtain time resource synchronization with the second terminal, the second indication information is used to indicate a frequency hopping parameter, and the frequency hopping parameter is a frequency hopping parameter used by a signal sent by the second terminal, and the first indication information and/or the second indication information are used to eliminate signal interference between the first terminal and the second terminal.

The network device provides the first terminal with a first timing parameter through the first indication information, and the first terminal can obtain time resource synchronization with the second terminal based on the first timing parameter. Due to the influence of the distance between the two communication devices, there is a transmission delay in signal transmission. The first terminal and the network device have completed the synchronization of time resources based on reference signals and information exchange, and the first terminal needs to receive signals from the second terminal (such as reference signals, data signals, etc.) to reconstruct the interference signal of the second terminal. Therefore, the first terminal needs to obtain time resource synchronization with the second terminal, that is, the first terminal needs to obtain the symbol timing of the communication resources of the second terminal in order to accurately The receiving time of the signal of the second terminal is received.

Exemplarily, the first indication information may be a medium access control (MAC) control element (CE) signaling, or a radio resource control (RRC) message.

The first indication information may include an identifier (ID) of the second terminal and the first timing parameter.

In one example, the first indication information is MAC CE signaling, in which the terminal ID may be 2 bytes and the first timing parameter may be 6 bytes. Optionally, the first indication information may indicate the timing parameters of one or more second terminals, such as the first indication information indicating the timing parameters of Q second terminals, where Q is a positive integer. The format of the MAC CE signaling may be as shown in FIG6 , where the terminal is a UE as an example, and each 2-byte UE ID corresponds to a 6-byte timing parameter.

In another example, the first indication information is MAC CE signaling, in which the terminal ID may be 4 bytes and the first timing parameter may be 12 bytes. Optionally, the first indication information may indicate the timing parameters of Q second terminals, and the format of the MAC CE signaling may be as shown in FIG. 7 , where the terminal is a UE as an example, and each 4-byte UE ID corresponds to a 12-byte timing parameter.

In one implementation, the network device sends first configuration information to the terminal, where the first configuration information is used to configure one or more candidate timing parameters, and the first timing parameter is one of the one or more candidate timing parameters.

Exemplarily, the first configuration information is an RRC message, and the first indication information is MAC CE signaling or downlink control information (DCI).

For example, the network device may configure one or more candidate timing parameters for the terminal through the first configuration information, each candidate timing parameter corresponds to an identifier, and the network device sends first indication information, where the first indication information includes the identifier of the second terminal and the identifier of the first timing parameter. The first terminal may determine, based on the first indication information, that the timing parameter corresponding to the second terminal is the first timing parameter from among the candidate timing parameters configured by the first configuration information.

For another example, the network device may configure each of the one or more candidate timing parameters to correspond to an identifier of a second terminal through the first configuration information, that is, the first configuration information configures the timing parameters of one or more second terminals. The first indication information may include the identifier of the second terminal, and the first terminal may determine the timing parameter of the second terminal according to the first configuration information and the identifier of the second terminal indicated by the first indication information. Or the first configuration information also configures the identifier of each candidate timing parameter, and the first indication information may include the identifier of the candidate timing parameter. The first terminal may determine that the candidate timing parameter is the first candidate timing parameter according to the first configuration information and the identifier of the candidate timing parameter indicated by the first indication information, and the first timing parameter is the timing parameter of the second terminal.

In one implementation, the first timing parameter may be a time advance (TA) parameter.

Exemplarily, the TA parameter may indicate the length of time that the uplink resource of the second terminal is advanced compared to the downlink resource of the first terminal. Alternatively, the TA parameter may indicate the length of time that the downlink resource of the first terminal is advanced compared to the downlink resource of the second terminal. The value of the TA parameter may be a negative value.

After the first terminal obtains the TA parameter (i.e., the first timing parameter) corresponding to the second terminal indicated by the first indication information, it can determine the time resource synchronization with the second terminal according to the downlink resource of the first terminal, so that when the second terminal sends a signal, the first terminal can receive the signal from the second terminal on the resource carrying the signal in the time resource of the second terminal based on the resource allocation parameter of the signal. So that the first terminal can reconstruct the interference signal of the second terminal to reduce the interference of the interference signal of the second terminal to the downlink signal of the first terminal.

The network device may indicate the frequency hopping parameter through the second indication information, and the frequency hopping parameter specifically indicates whether the second terminal uses the frequency hopping mode or not when sending a signal. The network device may also not indicate the frequency hopping parameter to the first terminal, and the first terminal may determine based on a predefined method that when the frequency hopping parameter is not obtained from the network device, the second terminal defaults to not using the frequency hopping mode or using the frequency hopping mode when sending a signal.

In one implementation, the second indication information is used to indicate one or more of the following scheduling parameters:

Frequency hopping parameters, time domain resource allocation parameters, frequency domain resource allocation parameters, number of transmission layers, precoding parameters or modulation and coding scheme (MCS).

The first terminal may receive the signal sent by the second terminal based on the scheduling parameter of the second indication information, so that the first terminal reconstructs the interference signal from the second terminal based on the received signal from the second terminal.

Exemplarily, the second indication information may be an RRC message, MAC CE signaling or DCI.

For example, the second indication information may be a DCI, and the DCI may be an uplink grant (UL grant) DCI of the second terminal, that is, a DCI for scheduling a physical uplink shared channel (PUSCH) of the second terminal. The second terminal may send a signal based on the uplink grant DCI, such as sending uplink data on a PUSCH resource indicated by the DCI. The network device may send the second The uplink authorization DCI of the terminal is sent to the first terminal, so that the first terminal can receive the signal sent by the second terminal based on the uplink authorization DCI. If the uplink authorization DCI may include time domain resource allocation parameters and frequency domain resource allocation parameters, the second terminal can determine the time domain resources and frequency domain resources of the PUSCH according to the uplink authorization DCI, and the second terminal can send a signal on the PUSCH. Accordingly, the first terminal can determine the time domain resources and frequency domain resources of the PUSCH based on the uplink authorization DCI, and receive the signal from the second terminal on the PUSCH. The uplink authorization DCI may also include one or more parameters such as the number of transmission layers, precoding parameters, MCS, etc. The second terminal can encode, modulate, etc. based on the uplink authorization DCI. Accordingly, the first terminal can demodulate, decode, etc. the signal obtained from the second terminal based on the uplink authorization DCI.

In one implementation, the network device sends second configuration information to the terminal device, where the second configuration information is used to configure a candidate parameter set of at least one scheduling parameter, and a first scheduling parameter among the scheduling parameters indicated by the second indication information is a parameter in a candidate parameter set.

The second configuration information may configure a candidate parameter set of the time domain resource allocation parameter, and the candidate parameter set includes multiple candidate time domain resource parameters, such as time domain resource allocation parameter 0, time domain resource allocation parameter 1, time domain resource allocation parameter 3, etc. The second indication information notifies the first terminal of the time domain resource allocation parameter of the second terminal by indicating an identifier of a candidate time domain resource allocation parameter in the candidate parameter set. For example, the second indication information indicates an identifier of the time domain resource allocation parameter 1. The first terminal may determine that the time domain resource allocation parameter of the second terminal is the time domain resource allocation parameter 1 according to the identifier of the time domain resource allocation parameter indicated by the second indication information.

The second configuration information can configure a candidate parameter set of one or more scheduling parameters in the frequency hopping parameter, time domain resource allocation parameter, frequency domain resource allocation parameter, number of transmission layers, precoding parameter, MCS or frequency hopping parameter, and notify the first terminal of the parameter adopted by the second terminal by indicating the identifier of the parameter in the corresponding candidate parameter set through the second indication information. The specific implementation method can refer to the configuration and indication method of the time domain resource allocation parameter in the previous text, which will not be repeated here.

If the second configuration information does not configure a candidate parameter set for one of the scheduling parameters, the network device may directly indicate the scheduling parameter through the second indication information. For example, the second configuration information may not configure a candidate parameter set for the number of transmission layers, and the network device may directly indicate the number of transmission layers used by the second terminal through the second indication information.

If the candidate parameter set of a scheduling parameter configured by the second configuration information includes only one parameter, the second indication information may indicate the scheduling parameter, and the first terminal assumes that the second terminal uses the scheduling parameter configured by the second configuration information. For example, if the second configuration information configures the frequency hopping parameter as not using the frequency hopping mode, the second indication information sent by the network device may not indicate the frequency hopping parameter, and the first terminal may determine that the signal sent by the second terminal does not use the frequency hopping mode based on the second configuration information.

Optionally, the maximum number of candidate parameters included in the candidate resource set of the scheduling parameters configured by the second configuration information may be specified.

For example, it may be specified that the maximum number of candidate parameters in the candidate set of the time domain resource allocation parameters configured by the second configuration information is 8. The second indication information may indicate one of the 8 candidate parameters through 3 bits. Alternatively, the maximum number of candidate parameters of the time domain resource allocation parameters may be configured to be 4, and the second indication information may indicate one of the 4 candidate parameters through 2 bits. In the current system, the number of candidate parameters of the frequency domain resource allocation parameters used by the terminal that the network device may configure for the terminal is 16. It may be specified that the maximum number of time domain resource allocation parameters configured by the network device for the terminal for determining the inter-terminal interference signal is less than 16 to reduce the overhead of the second indication information.

The second configuration information may be configured to configure a frequency domain resource allocation parameter for allocating PRBs near the center of a type 1 uplink subband (UL subband), and the second indication information may indicate one of the candidate parameters of the frequency domain resource allocation parameter through 8 bits.

It can be stipulated that the second configuration information configures at most two transmission layer numbers, such as the candidate parameter of the transmission layer number is 1 or 2, and the second indication information can be one of the two candidate parameters of the transmission layer number configured by the 1-bit second configuration information.

It may be stipulated that the second configuration information may configure a maximum of 4 candidate parameters in the candidate set of precoding parameters when the number of transmission layers is 1 and 4 candidate parameters when the number of transmission layers is 2. The second indication information may indicate one of the 8 candidate parameters of the precoding parameters configured by the second configuration information through 3 bits.

It can be stipulated that the second configuration information can configure at most 2 MCS corresponding to quadrature phase shift keying (quadrature phase shift keying, QPSK) and 2 MCS corresponding to 16-quadrature amplitude modulation (quadrature amplitude modulation, QAM), and the second indication information can indicate one of the 4 candidate parameters of the MCS configured by the second configuration information through 2 bits.

In one example, the second configuration information may be an RRC message, and the second indication information may be MAC CE signaling.

For example, the second indication information specifically indicates the scheduling parameters of Q second terminals. The format of the second indication information when it is MAC CE signaling can be as shown in Figure 8. Taking the terminal as UE as an example, the UE ID of each UE in the MAC CE is 2 bits, and each UE ID corresponds to a 3-bit time domain resource allocation parameter, a 1-bit transmission layer number parameter (or called rank indicator (RI)), a 2-bit MCS, and an 8-bit frequency domain resource allocation parameter. Optionally, the network device configures the frequency hopping parameter through the RRC message. A candidate value, the first terminal can determine whether the signal sent by each second terminal adopts a frequency hopping mode based on the RRC message. However, the application is not limited thereto.

In another example, the second configuration information may be an RRC message, and the second indication information may be a DCI.

For example, the DCI used as the second indication information may be a DCI in a currently defined DCI format, and the reserved bits in the DCI in this format may be used to indicate the scheduling parameters of the second terminal. For example, the DCI may include an identifier of a candidate parameter in a candidate parameter set of one or more scheduling parameters configured by the network device through an RRC message, so that the first terminal may determine the scheduling parameters used by the second terminal according to the identifier of the scheduling parameters in the RRC message and the DCI, thereby receiving a signal from the second terminal based on the scheduling parameters, and thereby determining the interference signal of the second terminal.

For another example, the DCI may be a DCI in a newly defined DCI format, such as a DCI format for indicating a scheduling parameter of an interfering terminal (or for determining an interference signal of an interfering terminal). Similarly, the DCI may include an identifier of a candidate parameter in a candidate parameter set of one or more scheduling parameters configured by the network device through an RRC message, so that the first terminal can determine the scheduling parameter adopted by the second terminal according to the identifier of the scheduling parameter in the RRC message and the DCI, thereby receiving a signal from the second terminal based on the scheduling parameter to determine the interference signal of the second terminal.

In one implementation, the network device sends fourth configuration information to the first terminal, where the fourth configuration information is used to configure a reference signal resource of the second terminal, where the reference signal resource is used by the first terminal to acquire channel information between the first terminal and the second terminal.

In one example, after receiving the fourth configuration information, the first terminal determines the reference signal resource of the second terminal, receives the reference signal on the reference signal resource, performs channel estimation to obtain channel information between the first terminal and the second terminal, and the channel information is used to recover the received signal from the second terminal, thereby determining the interference signal of the second terminal.

In another example, the network device can configure one or more candidate reference signal resources of the second terminal through the fourth configuration information, and the network device also sends fourth indication information to the terminal, and the fourth indication information is used to indicate a reference signal resource among the one or more reference signal resources. After receiving the fourth indication information, the first terminal can receive a reference signal on the reference signal resource indicated by the fourth indication information, and perform channel estimation to obtain channel information between the first terminal and the second terminal. So that the first terminal can recover the signal received from the second terminal based on the channel information, thereby determining the interference signal of the second terminal.

Optionally, the maximum number of reference signal resources of the second terminal configured by the fourth configuration information may be specified. The maximum data amount may be determined based on the number of terminals P supporting simultaneous elimination of interference from multiple terminals reported by the first terminal, and the maximum data amount is less than or equal to P.

The reference signal resource can be a sounding reference signal (SRS) resource or a demodulation reference signal (DMRS) resource.

For example, the reference signal resource is a DMRS resource, and the fourth configuration information is called a DMRS uplink configuration of a CLI, such as DMRS-UplinkConfig-CLI. The fourth configuration information format may be expressed as follows:

Among them, the fourth configuration information indicates the ID of the DMRS resource (ie, DMRS-resourceId) through dmrs-resourceId, and the configuration parameters after the dmrs-resourceId configure the configuration parameters corresponding to the ID of the DMRS resource. The fourth configuration information can configure the configuration parameters of multiple DMRS resources by indicating the IDs of different DMRS resources through dmrs-resourceId. The DMRS-resourceId can be expressed as follows:

DMRS-resourceId::=INTEGER(0..maxCLICancellerNum-1)

Among them, maxCLICancellerNum is the maximum number of DMRS resources, and the maxCLICancellerNum is less than or equal to P. The format of the fourth configuration information may also include type indication information dmrs-Type of the DMRS resource, and the type indication information is used to indicate that the type of the DMRS resource is type 2 (type2). If the fourth configuration information does not include the type indication information, the type of the DMRS resource is type 1. The format of the fourth configuration information may also include position indication information dmrs-AdditionalPosition of the additional DMRS, and the indication information indicates one of the predefined DMRS positions corresponding to pos0, pos1, and pos3. The format of the fourth configuration information also includes maximum length indication information maxLength, which is used to indicate that the maximum length of the DMRS resource is 2, that is, two symbols. If the fourth configuration information does not include the maximum length indication information, the maximum length of the DMRS resource is 1. The fourth configuration information may also include precoding transform disable indication information transformPrecodingDisabled or precoding transform enable indication information transformPrecodingEnabled. If the fourth configuration information includes transformPrecodingDisabled, the fourth configuration information also configures two scrambling IDs, namely scramblingID0 and scramblingID1. If the fourth configuration information includes transformPrecodingEnabled, the fourth configuration information also only configures the number of PUSCH identifiers through nPUSCH-Identity. Whether group frequency hopping is performed is indicated by whether sequenceGroupHopping exists, and whether frequency hopping is performed is indicated by whether sequenceHopping exists.

In one implementation, before S501, the network device may send fifth configuration information to the first terminal, the fifth configuration information being used to configure the first terminal to perform CLI measurement. The first terminal measures interference strength, or CLI strength, of one or more terminals according to the fifth configuration information from the network device.

Specifically, the fifth configuration information may configure a reference signal resource for measuring the interference strength of one or more terminals, and the first terminal measures the reference signal resource configured by the fifth configuration information to obtain the interference strength of the one or more terminals. Exemplarily, the interference strength may be a reference signal received power (RSRP).

The fourth configuration information and the fifth configuration information may be the same configuration information, that is, the first terminal may obtain the channel information between the first terminal and the second terminal based on the reference signal resource for measuring the interference strength. Alternatively, the fourth configuration information and the fifth configuration information may be different configuration information, respectively used to configure the reference signal resource for obtaining the channel information and the reference signal resource for measuring the interference strength.

After the first terminal measures the interference strength of one or more terminals, it can report the measurement result to the network device, and the measurement result may include the identification and interference strength of all terminals measured by the first terminal. Or the measurement result may include the interference strength greater than or equal to the threshold and the identification of the corresponding terminal.

The network device can determine Q second terminals based on the measurement results reported by the first terminal, and send auxiliary information for determining the interference signals of the Q second terminals to the first terminal, such as the auxiliary information includes the first indication information and/or the second indication information mentioned above, and the auxiliary information can also include one or more of the first configuration information, the second configuration information, the fourth indication information or the fourth configuration information mentioned above.

In one implementation, the first terminal sends third indication information to the network device, where the third indication information is used to indicate an interference elimination method for a downlink signal supported by the first terminal, where the interference elimination method includes a method for eliminating an interference signal from the terminal in the downlink signal.

The network device determines, based on the third indication information, that the first terminal supports an interference elimination method for eliminating interference signals from the terminal in a downlink signal, and then sends auxiliary information for determining interference signals of Q second terminals to the first terminal.

Optionally, the third indication information is also used to indicate the number P of terminals supported by the first terminal for simultaneously eliminating interference from multiple terminals, where P is greater than or equal to Q and is a positive integer.

The network device may determine Q second terminals according to the number P indicated by the third indication information, and send auxiliary information used to determine interference signals of the Q second terminals to the first terminal.

For example, the network device may determine that the terminal with the greatest interference intensity is the second terminal based on the interference intensity of one or more terminals in the measurement results reported by the first terminal, i.e., Q=1, and send auxiliary information for determining the interference signal of the second terminal to the first terminal.

For another example, the network device may determine Q second terminals based on the interference strength of one or more terminals in the measurement results reported by the first terminal and the number of terminals P supporting interference cancellation reported by the terminal, where Q is greater than or equal to 1 and less than P, and the network device sends auxiliary information for determining interference signals of the Q second terminals to the first terminal. In S502, the terminal device determines the interference signals from the Q second terminals based on the auxiliary information corresponding to the Q second terminals, thereby reducing the interference from the terminal in the downlink signal.

In another implementation, the network device may determine Q second terminals based on the measurement result reported by the first terminal, and send auxiliary information for determining the interference signals of the Q second terminals to the first terminal. K second terminals among the Q second terminals, where K is a positive integer less than or equal to Q. The first terminal determines interference signals from the K second terminals in S502 based on the auxiliary information corresponding to the K second terminals.

Optionally, S502: The first terminal determines an interference signal from the second terminal according to the first indication information and/or the second indication information.

The first terminal may acquire time resource synchronization with the second terminal according to the first indication information.

The first terminal may receive a reference signal from the second terminal on the reference signal resource of the second terminal, and perform channel estimation based on the reference signal to obtain channel information H _UE-UE . Specifically, the first terminal may use a channel estimation algorithm such as discrete Fourier transform (DFT) or minimum mean square error (MMSE) to complete channel estimation and obtain channel information H _UE-UE .

And, the first terminal may receive a second signal from the second terminal based on the scheduling parameters of the second terminal. The manner in which the first terminal obtains the scheduling parameters of the second terminal may be implemented based on the description in S502. Alternatively, the first terminal may receive second configuration information from the network device, obtain a candidate parameter set of the scheduling parameters, and blindly estimate the scheduling parameters adopted by the second terminal based on the candidate parameter set, thereby receiving the second signal from the second terminal. Optionally, the second signal may be a signal carried on the PUSCH of the second terminal.

After the first terminal receives the second signal from the second terminal, the first terminal may demodulate the second signal of the second terminal using a demodulation algorithm such as MMSE or QR decomposition and M-algorithm (QRM) to obtain data x _I-UE of the second terminal.

If the reference signal resource for the first terminal to obtain channel information is an SRS resource, the first terminal may determine the interference signal I _UE-UE of the second terminal based on the channel information, the precoding parameter (that is, the auxiliary information needs to indicate the precoding parameter of the second terminal) and the data of the second terminal. The interference signal I _UE-UE may be expressed as:

I _UE-UE =H _UE-UE *P*x _I-UE .

Wherein, P is the precoding matrix indicated by the precoding parameter.

If the reference signal resource for the first terminal to obtain channel information is a DMRS resource, the first terminal may determine the interference signal I _UE-UE of the second terminal based on the channel information and the data of the second terminal. The interference signal I _UE-UE may be expressed as:

I _UE-UE = H _UE-UE *x _I-UE .

If the first terminal determines the interference signals of M second terminals, M is equal to the above Q, or M is equal to the above K, then the first terminal can determine the interference signal I _{UE-UE i} of each second terminal i in the above manner, and the first terminal can obtain the total interference signal from the terminal, that is, the sum of the interference signals of the M second terminals I _UE-UE . The interference signal I _UE-UE can be expressed as:

Optionally, S503: The first terminal obtains data in the first signal according to the interference signal of the second terminal and the first signal from the network device.

The first terminal receives a first signal from the network device and obtains a received signal Y, which can be expressed as follows:

Y＝H _DL *x _DL +I+N

Among them, x _DL is the first signal sent by the network device to the first terminal, and the first signal includes downlink data, H _DL is the channel information between the network device and the first terminal, N is noise, I is the interference signal, and since there is at least one second terminal CLI to the first terminal, the interference signal I includes the sum of interference signals from at least one second terminal I _UE-UE . After the first terminal receives the signal Y and eliminates the inter-terminal interference I _UE-UE , it obtains Y', which reduces the interference in the received signal. After demodulating Y', the first terminal obtains the downlink data in the first signal sent by the network device to the terminal.

According to the above scheme, the first terminal obtains auxiliary information from the network device, so that the first terminal can reconstruct the interference signal from the second terminal based on the auxiliary information, thereby enabling the first terminal to reduce the interference of signals sent by other terminals on the downlink signal and improve the reliability of downlink transmission.

In the embodiment shown in Figure 5, the at least one second terminal may include a second terminal that establishes a communication connection with the network device, that is, the second terminal and the first terminal are connected to the same network device, or the network device that provides communication services for the second terminal and the first terminal is the same network device. In this case, the auxiliary information provided by the network device to the first terminal for determining the interference signal of the second terminal may be determined by the network device based on the business needs of the second terminal, etc.

The at least one second terminal may include a second terminal that establishes a communication connection with other network devices, and the second terminal is not connected to the same network device as the first terminal, such as the first terminal and the second terminal are located in two adjacent cells managed by different network devices. Then the service network device of the first terminal (referred to as the first network device) can obtain auxiliary information for determining the interference signal of the second terminal from the service network device of the second terminal, and then send it to the first terminal.

Fig. 9 is a schematic diagram of a communication method 900 provided in an embodiment of the present application. It should be understood that the same parts in the method 900 as those in the method 500 shown in Fig. 5 can be implemented with reference to the above description, and will not be repeated here.

S901: The first terminal sends a CLI measurement result to a first network device.

Accordingly, the first network device receives a CLI measurement result from the first terminal, where the measurement result may include interference strength of at least one terminal measured by the first terminal, where the at least one terminal includes the second terminal.

S902: The first terminal sends capability information to the first network device.

Correspondingly, the first network device receives the capability information from the first terminal. The capability information includes the third indication information described above. That is, the capability information is used to indicate the interference elimination method of the downlink signal supported by the first terminal, and the interference elimination method includes a method for eliminating the interference signal from the terminal in the downlink signal. Optionally, the capability information is also used to indicate the number of terminals P supported by the first terminal for eliminating interference from multiple terminals at the same time.

It should be understood that the present application does not limit the order of executing S901 and S902, and the first terminal may execute S902 before S901.

S903: The first network device and the second network device exchange information on the cell-level configuration information and/or the terminal-level configuration information.

The cell-level configuration information may include but is not limited to one or more of the following:

Cell frame structure configuration information, cell-level time advance TA information, or subcarrier spacing used by the cell's frequency domain resources.

Terminal-level configuration information includes, but is not limited to, one or more of the following:

The CLI measurement result of the terminal, the capability information of the terminal, the time advance TA information of the terminal, the reference signal resource configuration information of the terminal, and part or all of the uplink scheduling parameters of the terminal.

For example, the first network device receives third configuration information from the second network device, where the third configuration information is used to indicate one or more of the following to the second terminal:

Timing parameters, frequency hopping parameters, scheduling parameters, reference signal resource configuration information, capability information or subcarrier spacing.

The first network device can determine the auxiliary information corresponding to the second terminal provided to the first terminal by interacting with the second network device on the configuration information, so that the first terminal can determine the interference signal from the second terminal. The auxiliary information includes the first indication information and/or the second indication information described above. Optionally, the auxiliary information also includes but is not limited to the first configuration information, the second configuration information, the fourth indication information or the fourth configuration information.

S904: The first network device sends auxiliary information corresponding to the second terminal to the first terminal.

Correspondingly, the first terminal receives the auxiliary information from the first network device.

S905: The first network device sends downlink scheduling information to the first terminal.

S906: The second network device sends uplink scheduling information to the second terminal.

It should be understood that the present application does not limit the order in which the first network device sends the downlink scheduling information and the second network device sends the uplink scheduling information. The second network device may send the uplink scheduling information before the first network device sends the downlink scheduling information.

S907, the first network device sends a downlink signal to the first terminal on the PDSCH, and the second terminal sends an uplink signal to the second network device on the PUSCH.

When the first terminal receives a downlink signal from the first network device on the PDSCH, the second terminal sends an uplink signal to the second network device on the PUSCH, and the uplink signal interferes with the first terminal receiving the downlink signal. The received signal of the first terminal includes an interference signal from the second terminal.

S908: The first terminal determines an interference signal from the second terminal according to the auxiliary information.

The first terminal receives a signal from the second terminal according to the auxiliary information, and reconstructs an interference signal from the second terminal according to the signal from the second terminal to determine the interference signal from the second terminal.

S909: The first terminal obtains downlink data in the downlink signal according to the interference signal of the second terminal and a received signal obtained by receiving the downlink signal.

The first terminal eliminates the interference signal contained in the received signal according to the interference signal from the second terminal determined by the first terminal, which can improve the signal to interference plus noise ratio (SINR) of the received signal and increase the probability of successful demodulation of the received signal by the terminal, thereby improving the reliability of downlink transmission.

According to the above scheme, the first terminal obtains auxiliary information from the network device, so that the first terminal can reconstruct the interference signal from the second terminal based on the auxiliary information, thereby enabling the first terminal to reduce the interference of signals sent by other terminals on the downlink signal and improve the reliability of downlink transmission.

It can be understood that, in order to implement the functions in the above embodiments, the base station and the terminal include hardware structures and/or components for executing the respective functions. Or software module. Those skilled in the art should easily realize that, in combination with the units and method steps of each example described in the embodiments disclosed in this application, this application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application scenario and design constraints of the technical solution.

Figures 10 and 11 are schematic diagrams of the structures of possible communication devices provided by embodiments of the present application. These communication devices can be used to implement the functions of the terminal (such as the first terminal or the second terminal) or the network device (such as the first network device or the second network device) in the above method embodiments, and thus can also achieve the beneficial effects possessed by the above method embodiments. In an embodiment of the present application, when the communication device is used to implement the functions of the terminal in the above method embodiments, the communication device may be one of the terminals 120a-120j as shown in Figure 1. When the communication device is used to implement the functions of the network device in the above method embodiments, the communication device may be a RAN node 110a or 110b as shown in Figure 1, or may be a module (such as a chip or a chip system) applied to a terminal or a network device.

The communication device 1000 includes a transceiver unit 1020, which can be used to receive or send information. The communication device 1000 may also include a processing unit 1010, which can be used to process instructions or data to implement corresponding operations.

It should be understood that when the communication device 1000 is a chip configured in (or used in) a communication device, the transceiver unit 1020 in the communication device 1000 can be an input/output interface or circuit of the chip, and the processing unit 1010 in the communication device 1000 can be a processor in the chip.

Optionally, the communication device 1000 may further include a storage unit, which may be used to store instructions or data, and the processing unit 1010 may execute the instructions or data stored in the storage unit to enable the communication device to implement corresponding operations.

The communication device 1000 can be used to implement the functions of the terminal in the above method embodiment. When the communication device 1000 is used to implement the functions of the terminal in the above method embodiment: the transceiver unit 1020 is used to receive the first indication information and/or the second indication information from the network device, the first indication information is used to indicate the first timing parameter, the second indication information is used to indicate the frequency hopping parameter, the first timing parameter is used to obtain time resource synchronization with the second terminal, the frequency hopping parameter is the frequency hopping parameter used by the signal sent by the second terminal, wherein the first indication information and the second indication information are used by the first terminal to eliminate the signal interference between the first terminal and the second terminal. The processing unit 1010 is used to determine the first timing parameter according to the first indication information, and/or, to determine the frequency hopping parameter according to the second indication information.

The communication device 1000 can be used to implement the functions of the network device in the above method embodiment. When the communication device 1000 is used to implement the functions of the network device in the above method embodiment: the processing unit 1010 is used to determine the first indication information and/or the second indication information, the first indication information is used to indicate the first timing parameter, the second indication information is used to indicate the frequency hopping parameter, the timing parameter is used to obtain time resource synchronization with the second terminal, the frequency hopping parameter is the frequency hopping parameter used by the signal sent by the second terminal, wherein the first indication information and the second indication information are used by the first terminal to eliminate the signal interference between the first terminal and the second terminal. The transceiver unit 1020 is used to send the first indication information and/or the second indication information to the first terminal.

For a more detailed description of the processing unit 1010 and the transceiver unit 1020, reference may be made to the related description in the above method embodiment.

It should be understood that the transceiver unit 1020 in the communication device 1000 can be implemented through a communication interface (such as a communication interface can be a transceiver, a transceiver circuit, an input/output interface, or a pin, etc.), and when the transceiver unit 1020 is a transceiver, the transceiver can be composed of a receiver and/or a transmitter. The processing unit 1010 in the communication device 1000 can be implemented by at least one processor, and the processing unit 1010 in the communication device 1000 can also be implemented by at least one logic circuit. Optionally, the communication device 1000 also includes a storage unit, which can be implemented by a memory.

As shown in FIG11 , the communication device 1100 includes a processor 1110 and an interface circuit 1120. The processor 1110 and the interface circuit 1120 are coupled to each other. It is understood that the interface circuit 1120 may be a transceiver or an input/output interface. Optionally, the communication device 1100 may further include a memory 1130 for storing instructions executed by the processor 1110 or storing input data required by the processor 1110 to execute instructions or storing data generated after the processor 1110 executes instructions.

In one implementation, the memory 1130 may also be integrated into the processor 1110 , or may be independent of the processor 1110 .

When the communication device 1100 is used to implement the method provided by the above method embodiment, the processor 1110 is used to implement the function of the above processing unit 1010 , and the interface circuit 1120 is used to implement the function of the above transceiver unit 1020 .

When the above communication device is a chip applied to a terminal, the terminal chip can realize the functions of the terminal in the above method embodiment. The terminal chip receives information/data from other modules in the terminal (such as a radio frequency module or an antenna), and the information/data is sent by the network device to the terminal; or the terminal chip sends information/data to other modules in the terminal (such as a radio frequency module or an antenna), and the information/data is sent by the terminal device to the network device.

When the above communication device is a module applied to a network device, the network device module can implement the functions of the network device in the above method embodiment. The network device module receives information/data from other modules (such as a radio frequency module or an antenna) in the network device. The information/data is sent by the terminal to the network device; or the network device module sends information/data to other modules in the network device (such as a radio frequency module or an antenna), and the information/data is sent by the network device to the terminal. The network device module here can be a baseband chip of the network device, or a DU or other module. The DU here can be a DU under the open radio access network (O-RAN) architecture.

It is understandable that the processor in the embodiments of the present application may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. The general-purpose processor may be a microprocessor or any conventional processor.

The method steps in the embodiments of the present application can be implemented in hardware or in software instructions that can be executed by a processor. The software instructions can be composed of corresponding software modules, and the software modules can be stored in random access memory, flash memory, read-only memory, programmable read-only memory, erasable programmable read-only memory, electrically erasable programmable read-only memory, register, hard disk, mobile hard disk, CD-ROM or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor so that the processor can read information from the storage medium and write information to the storage medium. The storage medium can also be a component of the processor. The processor and the storage medium can be located in an ASIC. In addition, the ASIC can be located in an access network device or a terminal device. The processor and the storage medium can also be present in an access network device or a terminal device as discrete components.

According to the method provided in the embodiment of the application, the embodiment of the present application also provides a computer program product, which includes: computer program code, when the computer program code is executed by one or more processors, the device including the processor executes the method provided in the above method embodiment.

In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When the computer program or instruction is loaded and executed on a computer, the process or function described in the embodiment of the present application is executed in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, a network device, a user device or other programmable device.

According to the method provided by the embodiments of the present application, the embodiments of the present application also provide a computer-readable storage medium, which stores the above-mentioned computer program or instructions. When the computer program or instructions are executed by one or more processors, the device including the processor executes the method provided by the above-mentioned method embodiment.

As described above, the computer program or instruction may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer program or instruction may be transmitted from one website, computer, server or data center to another website, computer, server or data center by wired or wireless means. The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or data center that integrates one or more available media. The available medium may be a magnetic medium, such as a floppy disk, a hard disk, or a magnetic tape; it may also be an optical medium, such as a digital video disc; it may also be a semiconductor medium, such as a solid-state drive. The computer-readable storage medium may be a volatile or non-volatile storage medium, or may include both volatile and non-volatile types of storage media.

According to the method provided in the embodiment of the present application, the embodiment of the present application also provides a communication system, including the one or more terminals mentioned above. The system may further include the one or more network devices mentioned above.

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

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

In the various embodiments of the present application, unless otherwise specified or provided for in any logical conflict, the terms and/or descriptions between the different embodiments are consistent and may be referenced to each other, and the technical features in the different embodiments may be combined to form new embodiments according to their inherent logical relationships.

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

Claims (40)

A communication method, characterized in that the method is applied to a first terminal, comprising: receiving first indication information and/or second indication information from a network device, wherein the first indication information is used to indicate a first timing parameter, and the second indication information is used to indicate a frequency hopping parameter, the first timing parameter is used to obtain time resource synchronization with a second terminal, and the frequency hopping parameter is a frequency hopping parameter used by a signal sent by the second terminal, The first indication information and the second indication information are used by the first terminal to eliminate signal interference between the first terminal and the second terminal. The method according to claim 1, characterized in that the method further comprises: Determine, according to the first indication information and/or the second indication information, an interference signal from the second terminal; Data in the first signal is obtained according to the interference signal and the first signal from the network device. The method according to claim 2, characterized in that the method further comprises: Sending third indication information to the network device, where the third indication information is used to indicate the number P of terminals supported by the first terminal for simultaneously eliminating interference from multiple terminals, where the first indication information and the second indication information indicate parameters of Q second terminals, where Q is less than or equal to P, and P and Q are positive integers; The determining, according to the first indication information and/or the second indication information, an interference signal from the second terminal includes: Determine interference signals from the Q second terminals according to the first indication information and/or the second indication information. The method according to claim 3 is characterized in that the third indication information is also used to indicate an interference elimination method for a downlink signal supported by the first terminal, and the interference elimination method includes a method for eliminating an interference signal from the terminal in the downlink signal. The method according to claim 2, wherein the first indication information and the second indication information indicate parameters of Q second terminals, The determining, according to the first indication information and/or the second indication information, an interference signal from the second terminal includes: According to the first indication information and/or the second indication information, interference signals from the K second terminals are determined, where the Q second terminals include the K second terminals, K is less than or equal to Q, and K and Q are positive integers. The method according to claim 5, characterized in that the method further comprises: The K second terminals are determined from the Q second terminals according to the interference strength of the Q second terminals and/or the number P of terminals that support simultaneous elimination of interference from multiple terminals, where P is a positive integer and K is less than or equal to P. The method according to any one of claims 1 to 6, characterized in that the method further comprises: First configuration information is received from the network device, where the first configuration information is used to configure one or more candidate timing parameters, where the first timing parameter is one of the one or more candidate timing parameters. The method according to claim 7 is characterized in that the first configuration information is RRC signaling, and the first indication information is media access control MAC control element CE signaling, or downlink control information DCI. The method according to any one of claims 1 to 8, characterized in that the second indication information is also used to indicate one or more of the following scheduling parameters: Time domain resource allocation parameters, frequency domain resource allocation parameters, number of transmission layers, precoding parameters, modulation and coding methods or frequency hopping parameters. The method according to claim 9, characterized in that the method further comprises: Second configuration information is received from the network device, where the second configuration information is used to configure a candidate parameter set of at least one scheduling parameter, and a first scheduling parameter among the one or more scheduling parameters is one of the candidate parameter sets. A communication method, characterized in that the method is applied to a first network device, comprising: sending first indication information and/or second indication information to the first terminal, where the first indication information is used to indicate a first timing parameter, and the second indication information is used to indicate a frequency hopping parameter, where the timing parameter is used to acquire time resource synchronization with the second terminal, and the frequency hopping parameter is a frequency hopping parameter used by a signal sent by the second terminal, The first indication information and the second indication information are used by the first terminal to eliminate signal interference between the first terminal and the second terminal. The method according to claim 11, characterized in that the method further comprises: Receive third indication information from the first terminal, where the third indication information is used to indicate the number P of terminals supported by the first terminal for simultaneously eliminating interference from multiple terminals, and the first indication information and the second indication information indicate parameters of Q second terminals, where Q is less than or equal to P, and P and Q are positive integers. The method according to claim 12 is characterized in that the third indication information is also used to indicate an interference elimination method for a downlink signal supported by the first terminal, and the interference elimination method includes a method for eliminating an interference signal from the terminal in the downlink signal. The method according to any one of claims 11 to 13, characterized in that the method further comprises: First configuration information is sent to the first terminal, where the first configuration information is used to configure one or more candidate timing parameters, and the first timing parameter is one of the one or more candidate timing parameters. The method according to claim 14 is characterized in that the first configuration information is RRC signaling, and the first indication information is media access control MAC control element CE signaling, or downlink control information DCI. The method according to any one of claims 11 to 15, characterized in that the second indication information is also used to indicate the following one or more scheduling parameters: Time domain resource allocation parameters, frequency domain resource allocation parameters, number of transmission layers, precoding parameters, modulation and coding methods or frequency hopping parameters. The method according to claim 16, characterized in that the method further comprises: Second configuration information is sent to the first terminal, where the second configuration information is used to configure a candidate parameter set of at least one scheduling parameter, and a first scheduling parameter among the one or more scheduling parameters is one of the candidate parameter sets. The method according to any one of claims 11 to 17, characterized in that the method further comprises: Receive third configuration information from the second network device, where the third configuration information is used to indicate one or more of the following: The first timing parameter, the frequency hopping parameter, the scheduling parameter of the second terminal, the reference signal configuration information of the second terminal, the capability information of the second terminal or the subcarrier spacing adopted by the second terminal. A communication device, comprising: a transceiver unit, configured to receive first indication information and/or second indication information from a network device, wherein the first indication information is used to indicate a first timing parameter, and the second indication information is used to indicate a frequency hopping parameter, wherein the first timing parameter is used to obtain time resource synchronization with a second terminal, and the frequency hopping parameter is a frequency hopping parameter used by a signal sent by the second terminal, wherein the first indication information and the second indication information are used by the first terminal to eliminate signal interference between the first terminal and the second terminal; A processing unit, used to determine the first timing parameter according to the first indication information, and/or used to determine the frequency hopping parameter according to the second indication information. The device according to claim 19, characterized in that the processing unit is further used for: Determine, according to the first indication information and/or the second indication information, an interference signal from the second terminal; Data in the first signal is obtained according to the interference signal and the first signal from the network device. The apparatus according to claim 20, characterized in that the transceiver unit is further used to send third indication information to the network device, the third indication information is used to indicate the number of terminals P supported by the first terminal to eliminate interference from multiple terminals at the same time, the first indication information and the second indication information indicate parameters of Q second terminals, Q is less than or equal to P, and P and Q are positive integers; The processing unit is specifically configured to determine interference signals from the Q second terminals according to the first indication information and/or the second indication information. The device according to claim 21 is characterized in that the third indication information is also used to indicate an interference elimination method of a downlink signal supported by the first terminal, and the interference elimination method includes a method for eliminating an interference signal from the terminal in the downlink signal. The device according to claim 20, wherein the first indication information and the second indication information indicate parameters of Q second terminals, The processing unit is specifically used to determine the interference signals from the K second terminals according to the first indication information and/or the second indication information, where the Q second terminals include the K second terminals, K is less than or equal to Q, and K and Q are positive integers. The device according to claim 23 is characterized in that the processing unit is also used to determine the K second terminals among the Q second terminals based on the interference strength of the Q second terminals and/or the number of terminals P that support simultaneous elimination of interference from multiple terminals, where P is a positive integer and K is less than or equal to P. The apparatus according to any one of claims 19 to 24 is characterized in that the transceiver unit is also used to receive first configuration information from the network device, the first configuration information is used to configure one or more candidate timing parameters, and the first timing parameter is one of the one or more candidate timing parameters. The device according to claim 25 is characterized in that the first configuration information is RRC signaling, and the first indication information is media access control MAC control element CE signaling, or downlink control information DCI. The device according to any one of claims 19 to 26, wherein the second indication information is further used to indicate one or more of the following scheduling parameters: Time domain resource allocation parameters, frequency domain resource allocation parameters, number of transmission layers, precoding parameters, modulation and coding methods or frequency hopping parameters. The device according to claim 27 is characterized in that the transceiver unit is also used to receive second configuration information from the network device, and the second configuration information is used to configure a candidate parameter set of at least one scheduling parameter, and the first scheduling parameter among the one or more scheduling parameters is one of the candidate parameter sets. A communication device, comprising: a processing unit, configured to determine first indication information and/or second indication information, wherein the first indication information is used to indicate a first timing parameter, and the second indication information is used to indicate a frequency hopping parameter, the timing parameter is used to obtain time resource synchronization with the second terminal, and the frequency hopping parameter is a frequency hopping parameter used by a signal sent by the second terminal, wherein the first indication information and the second indication information are used by the first terminal to eliminate signal interference between the first terminal and the second terminal; A transceiver unit is used to send the first indication information and/or the second indication information to the first terminal. The device according to claim 29 is characterized in that the transceiver unit is used to receive third indication information from the first terminal, the third indication information is used to indicate the number P of terminals supported by the first terminal for simultaneously eliminating interference from multiple terminals, the first indication information and the second indication information indicate parameters of Q second terminals, Q is less than or equal to P, and P and Q are positive integers. The device according to claim 30 is characterized in that the third indication information is also used to indicate the interference elimination method of the downlink signal supported by the first terminal, and the interference elimination method includes a method for eliminating the interference signal from the terminal in the downlink signal. The device according to any one of claims 29 to 30 is characterized in that the transceiver unit is also used to send first configuration information to the first terminal, the first configuration information is used to configure one or more candidate timing parameters, and the first timing parameter is one of the one or more candidate timing parameters. The device according to claim 32 is characterized in that the first configuration information is RRC signaling, and the first indication information is media access control MAC control element CE signaling, or downlink control information DCI. The apparatus according to any one of claims 29 to 33, wherein the second indication information is further used to indicate one or more of the following scheduling parameters: Time domain resource allocation parameters, frequency domain resource allocation parameters, number of transmission layers, precoding parameters, modulation and coding methods or frequency hopping parameters. The device according to claim 34 is characterized in that the transceiver unit is also used to send second configuration information to the first terminal, and the second configuration information is used to configure a candidate parameter set of at least one scheduling parameter, and a first scheduling parameter among the one or more scheduling parameters is one of the candidate parameter sets. The apparatus according to any one of claims 29 to 35, characterized in that the transceiver unit is further used to receive third configuration information from the second network device, and the third configuration information is used to indicate one or more of the following: The first timing parameter, the frequency hopping parameter, the scheduling parameter of the second terminal, the reference signal configuration information of the second terminal, the capability information of the second terminal or the subcarrier spacing adopted by the second terminal. A communication device, characterized in that it comprises at least one processor coupled to a memory; The memory is used to store programs or instructions; The at least one processor is configured to execute the program or instruction so that the apparatus implements the method according to any one of claims 1 to 10, or implements the method according to any one of claims 11 to 18. A communication device, characterized in that it comprises at least one processor and a communication interface; The communication interface is used to receive a signal input into the communication device or a signal output from the communication device, and the processor communicates with the communication interface and executes code instructions through a logic circuit to implement the method as described in any one of claims 1 to 10, or implements the method as described in any one of claims 11 to 18. A computer-readable storage medium, characterized in that instructions are stored therein, and when the instructions are executed on a computer, the computer is caused to execute the method according to any one of claims 1 to 18. A computer program product, characterized in that it comprises instructions, and when the instructions are executed on a computer, the computer is caused to execute the method according to any one of claims 1 to 18.