CN111867089A

CN111867089A - Resource allocation method and equipment

Info

Publication number: CN111867089A
Application number: CN201910365511.6A
Authority: CN
Inventors: 罗海燕; 戴明增; 曾清海
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-04-30
Filing date: 2019-04-30
Publication date: 2020-10-30
Anticipated expiration: 2039-04-30
Also published as: CN111867089B; WO2020221199A1

Abstract

The embodiment of the application discloses a resource allocation method and communication equipment, wherein the method comprises the following steps: the access network equipment receives a first message from a first node, wherein the first message is used for indicating that the terminal equipment is associated to the first node; the access network equipment receives a second message from the second node, wherein the second message is used for indicating that the terminal equipment is associated to the second node; the access network equipment allocates a first time-frequency resource of a first side link for the terminal equipment; the access network equipment allocates a second time-frequency resource of a second side link for the terminal equipment, and the first time-frequency resource and the second time-frequency resource are not overlapped; the access network equipment sends first time-frequency resource information to the first node and second time-frequency resource information to the second node, wherein the first time-frequency resource information indicates a first time-frequency resource, and the second time-frequency resource information indicates a second time-frequency resource.

Description

Resource allocation method and equipment

Technical Field

The present application relates to the field of communications technologies, and in particular, to a resource allocation method and device.

Background

The conventional cellular network communication mainly includes communication between an access network device (e.g., a base station) and a terminal device, and introduction of a device-to-device (D2D) communication mode increases direct communication between the terminal devices. In the subsequent consideration of the internet of vehicles, a communication mode of the internet of vehicles (V2X) is introduced. In the V2X communication mode, nodes for managing multiple terminal devices are introduced in different local areas, and the nodes allocate side link time-frequency resources to the managed terminal devices. The node is managed by the access network device. The node may schedule transmission resources between the terminal device and the node within the local area and between the terminal device and the terminal device within the local area. The local resources for which the node is responsible may be allocated by the access network device or may be self-aware.

For example, as shown in fig. 1, the first node and the second node have Radio Resource Control (RRC) connections with access network devices, and they are respectively responsible for managing a local area. The first node is responsible for managing terminal devices 1 and 2 within area 1. The terminal equipment is associated to the first node through a side link association process. The first node and the terminal device 1, the first node and the terminal device 2, and the side link time-frequency resources communicated between the terminal device 1 and the terminal device 2 are all scheduled by the first node. Wherein the dotted line represents the control plane and the solid line represents the user plane. Similarly, the second node is responsible for managing the terminal devices 3 and 4 within the area 2.

In some cases, one terminal device may also be associated to multiple nodes at the same time, i.e. one terminal device may also be managed by multiple nodes at the same time. For example, as shown in fig. 2, the first node and the second node are each responsible for managing the terminal device 2. When a plurality of nodes manage the same terminal device, how to reasonably allocate side link time-frequency resources to the terminal device is a problem to be solved urgently at present.

Disclosure of Invention

The embodiment of the application provides a resource allocation method and equipment, which can reasonably allocate side link time-frequency resources to terminal equipment.

In a first aspect, an embodiment of the present application provides a resource allocation method, where the method includes: the access network equipment receives a first message from a first node, wherein the first message is used for indicating that the terminal equipment is associated to the first node; the access network equipment receives a second message from the second node, wherein the second message is used for indicating that the terminal equipment is associated to the second node; the access network equipment allocates a first time-frequency resource of a first side link for the terminal equipment; the access network equipment allocates a second time-frequency resource of a second side link for the terminal equipment, and the first time-frequency resource and the second time-frequency resource are not overlapped; the access network equipment sends first time-frequency resource information to the first node and second time-frequency resource information to the second node, wherein the first time-frequency resource information indicates a first time-frequency resource, and the second time-frequency resource information indicates a second time-frequency resource.

Based on the method described in the first aspect, the access network device may uniformly allocate non-overlapping side link time-frequency resources to the terminal device associated with the plurality of nodes, thereby ensuring that the terminal device can normally perform data transmission. Therefore, based on the method described in the first aspect, the access network device can reasonably allocate a side link time-frequency resource to the terminal device.

Optionally, the access network device and the first node communicate through an air interface of the cellular network, and the access network device and the second node communicate through the air interface of the cellular network; the first node and the terminal device communicate through a first sidelink, and the second node and the terminal device communicate through a second sidelink.

Optionally, the terminal device is a terminal device in a half-duplex mode. Based on the optional mode, side link time frequency resources can be reasonably allocated to the terminal equipment in the half-duplex mode.

Optionally, the first message further includes an identifier of the terminal device on the first sidelink or the second message further includes an identifier of the terminal device on the second sidelink, and the access network device may further perform the following steps: the access network equipment acquires the capability information of the terminal equipment according to the identifier of the terminal equipment on the first side link or the identifier of the terminal equipment on the second side link; and the access network equipment determines that the terminal equipment is the terminal equipment in the half-duplex mode according to the capability information of the terminal equipment. Based on the optional mode, the access network equipment can acquire the capability information of the terminal equipment, and then the terminal equipment is determined to be the terminal equipment in the half-duplex mode according to the capability information of the terminal equipment.

In a second aspect, an embodiment of the present application provides a resource allocation method, where the method includes: the method comprises the steps that a first node receives a first request from a terminal device, wherein the first request is used for requesting to establish association with the first node; the first node sends a first message to the access network equipment, wherein the first message is used for indicating that the terminal equipment is associated to the first node; the first node receives first time-frequency resource information from the access network equipment, wherein the first time-frequency resource information indicates first time-frequency resources, the first time-frequency resources are time-frequency resources of a first side link allocated to the terminal equipment by the access network equipment, the first time-frequency resources are not overlapped with second time-frequency resources, and the second time-frequency resources are time-frequency resources of a second side link allocated to the terminal equipment by the access network equipment.

Optionally, the access network device and the first node communicate via an air interface of the cellular network, and the first node and the terminal device communicate via a first side link.

Optionally, the terminal device is a terminal device in a half-duplex mode.

Optionally, the first message further includes an identifier of the terminal device on the first sidelink.

Based on the same inventive concept, the beneficial effects of the second aspect or the optional manner of the second aspect may refer to the beneficial effects of the first aspect or the optional manner of the first aspect, and repeated details are not repeated.

In a third aspect, an embodiment of the present application provides an interference coordination method, where the method includes: a first node determines a second node, wherein the first node is responsible for allocating a first time-frequency resource of a first side link to a terminal device under the first node, the second node is responsible for allocating a second time-frequency resource of a second side link to a terminal device under the second node, the first time-frequency resource and the second time-frequency resource have overlapping resources, the first node is managed by a first access network device, and the second node is managed by a second access network device; the first node sends first information to the second node, wherein the first information is used for indicating a third time frequency resource for interference coordination, and the third time frequency resource is part or all of overlapping resources.

Based on the method described in the third aspect, the first node can determine a second node having overlapping side link time frequency resources, and send first information indicating a third time frequency resource for interference coordination to the second node. So that the second node can perform interference coordination according to the first information. Therefore, based on the method described in the third aspect, interference coordination can be performed.

Optionally, the specific implementation manner of the first node determining the second node is as follows: the first node receiving second information from the first access network device, the second information indicating the second node; the first node determines a second node according to the second information. Based on this alternative, the first access network device may inform the first node of the second node.

Optionally, the second information further indicates the overlapping resources between the first node and the second node. By indicating the overlapping resource, the first node can screen the second node according to the overlapping resource and only send the first information to part of the second nodes, which is beneficial to saving transmission resources. For example, if the third time-frequency resource is a time-frequency resource interfered by a signal of the first device, the first device is the first node or a terminal device managed by the first node. The first node may determine a target second node from the plurality of second nodes, where the time-frequency resource and the third time-frequency resource have an overlap, according to the overlapping resource. I.e. the target second node or the terminal device managed by the target second node causes interference to the first device. After the first node determines the target second node, only the first information needs to be sent to the target second node.

Optionally, the third time-frequency resource is a time-frequency resource interfered by a signal of the terminal device under the first node, and the first node may further perform the following steps: the first node receives third information from a terminal device under the first node, wherein the third information is used for indicating one or more of the following: a carrier wave interfered by a signal of the terminal equipment under the first node, a resource pool interfered by the signal of the terminal equipment under the first node, a sub-channel interfered by the signal of the terminal equipment under the first node, a resource block interfered by the signal of the first equipment, and a frame, a sub-frame or a time slot interfered by the signal of the first equipment; and the first node determines a third time-frequency resource according to the third information. Based on the optional mode, the first node can determine the time-frequency resource interfered by the signal of the terminal equipment under the first node.

In a fourth aspect, a communication device is provided, which may be an access network device or a first node. When the communication device is an access network device, the communication device may comprise a communication module and a processing module to perform the corresponding method steps of any of the above-mentioned first aspect and alternative embodiments of the first aspect. When the communication device is a first node, the communication device may comprise a receiving module, a sending module and a processing module to perform the corresponding method steps of any one of the second aspect, the third aspect, the optional embodiments of the second aspect and the optional embodiments of the third aspect described above. The modules can be realized by hardware, and can also be realized by hardware executing corresponding software. For example, the receiving module is configured to execute the receiving action in the above method embodiment, the sending module is configured to execute the sending action in the above method embodiment, and the processing module may execute the processing action such as the determination in the above method embodiment.

Alternatively, the communication device may also be an access network device or a chip in the first node, and when the communication device is a chip in an access network device, the communication device is configured to implement the method of any one of the foregoing first aspect and optional implementation manners of the first aspect. When the communication device is a chip in a first node, the communication device is configured to implement the method of any one of the second aspect, the third aspect, the optional embodiments of the second aspect, and the optional embodiments of the third aspect described above. Based on the same inventive concept, the principle and the beneficial effects of the communication device for solving the problems may refer to the method and the beneficial effects of any one of the first aspect to the third aspect and the optional implementation manner of the first aspect to the optional implementation manner of the third aspect, and repeated details are not repeated.

In a fifth aspect, there is provided a communication device comprising: a processor, a memory, a communication interface; the processor, the communication interface and the memory are connected; wherein the communication interface may be a transceiver. The communication interface is used for realizing communication with other network elements. The communication device may be an access network device or a first node. When the communication device is an access network device, the processor invokes a program stored in the memory to implement the method of any of the above-described first aspect and optional embodiments of the first aspect. When the communication device is a first node, the processor invokes a program stored in the memory to implement the method of any of the second aspect, the third aspect, the alternative embodiments of the second aspect, and the alternative embodiments of the third aspect described above. For the embodiments and the advantageous effects of the communication device to solve the problems, reference may be made to the methods and the advantageous effects of any one of the foregoing first to third aspects and optional embodiments of the first to third aspects, and repeated details are not repeated.

A sixth aspect provides a computer program product which, when run on a computer, causes the computer to perform the method of any one of the above first to third aspects, and alternative embodiments of the first to third aspects.

A seventh aspect provides a computer-readable storage medium having stored therein instructions, which when run on a computer, cause the computer to perform the method of any one of the first to third aspects, optional implementations of the first aspect to optional implementations of the third aspect.

In an eighth aspect, a communication system is provided, where the communication system includes an access network device and a first node, the access network device may perform the method of any of the first aspect and the optional implementation of the first aspect, and the first node may perform the method of any of the second aspect and the optional implementation of the second aspect.

Drawings

Fig. 1 is a schematic diagram of a conventional communication system;

fig. 2 is a schematic diagram of a communication system provided in an embodiment of the present application;

fig. 3 is a flowchart illustrating a resource allocation method according to an embodiment of the present application;

Fig. 4 is a schematic flowchart of another resource allocation method provided in an embodiment of the present application;

fig. 5 is a schematic diagram of another communication system provided by an embodiment of the present application;

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

fig. 7 is a schematic diagram of signal interference provided by an embodiment of the present application;

fig. 8 is a schematic diagram of another signal interference provided by an embodiment of the present application;

fig. 9 is a schematic diagram of another signal interference provided by an embodiment of the present application;

fig. 10 is a schematic diagram of another signal interference provided by an embodiment of the present application;

fig. 11 is a flowchart illustrating an interference coordination method according to an embodiment of the present application;

fig. 12 is a flowchart illustrating another interference coordination method according to an embodiment of the present application;

fig. 13 is a schematic structural diagram of a communication device according to an embodiment of the present application.

Detailed Description

Specific embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

In order to better understand the embodiments of the present application, a system architecture to which the embodiments of the present application can be applied is described below.

Fig. 2 is a schematic diagram of a communication system according to an embodiment of the present application. As shown in fig. 2, the communication system includes an access network device, a first node, a second node, and a terminal device. Wherein terminal device 1 is associated with a first node, terminal device 2 is associated with the first node and a second node, and terminal device 3 is associated with the second node. Fig. 2 exemplifies a communication system including three terminal apparatuses. Of course, the communication system may further include more than three or less than three terminal devices, and the embodiment of the present application is not limited.

Optionally, the access network device and the first node communicate through an air interface of the cellular network, and the access network device and the second node communicate through the air interface of the cellular network; the first node and the terminal device communicate via a first sidelink (sidelink) and the second node and the terminal device communicate via a second sidelink.

The access network equipment is used for managing the first node and the second node.

The first node may allocate time-frequency resources of the first sidelink for terminal devices associated only with the first node. The second node may allocate time-frequency resources of the second sidelink for terminal devices associated only with the second node. The association of a terminal device with a node means that the terminal device has established contact with the node. After the terminal device associates with the node, the terminal device belongs to the terminal device under the node and is managed by the node.

For example, the access network device may allocate, in advance, a time-frequency resource 1 of the first side link for the first node, and the first node allocates, from the time-frequency resource 1, a time-frequency resource of the first side link for the terminal device 1. The access network device may allocate a time-frequency resource 2 of the second side link to the second node in advance, and the second node allocates a time-frequency resource of the second side link to the terminal device 3 from the time-frequency resource 2. Or the time frequency resource 1 and the time frequency resource 2 may not be allocated by the access network device, the time frequency resource 1 may be determined by the first node after performing channel sensing by itself, and the time frequency resource 2 may be determined by the second node after performing channel sensing by itself. For example, the way for the first node to determine time-frequency resource 1 by sensing the channel may be: when the first node finds that the received signal strength of the channel is smaller than the threshold 1, or the ratio of the received signal strength smaller than the threshold 1 in a preset time is higher than the threshold 2, the first node determines that the channel is available, and the first node determines that the channel is a time-frequency resource 1. The manner of sensing and determining the time-frequency resource 2 by the second node is the same as that of sensing and determining the channel, and is not described herein again.

In practical applications, when the same terminal device is associated with multiple nodes, the multiple nodes often cannot reasonably allocate side link time-frequency resources to the terminal device. For example, if the terminal device 2 is a terminal device in a half-duplex mode, the terminal device 2 cannot simultaneously transceive data, and the terminal device 2 cannot transmit data to a different device in the same time-frequency resource, and the terminal device 2 cannot receive data transmitted by a different device in the same time-frequency resource. The terminal device in the half-duplex mode is that the terminal device cannot transmit data and receive data simultaneously in the communication process.

The terminal device 2 being unable to send data to different devices in the same time-frequency resource includes: the terminal device 2 is not able to send data to the first node and the second node on the same time-frequency resources. The terminal device 2 cannot transmit data to the first node and other terminal devices on the same time-frequency resource. The terminal device 2 is not able to send data to the second node and other terminal devices on the same time-frequency resources. The terminal device 2 cannot transmit data to any other two terminal devices in the same time-frequency resource.

The fact that the terminal device 2 cannot receive data sent by different devices in the same time-frequency resource means that: the terminal device 2 cannot receive the data transmitted by the first node and the second node in the same time-frequency resource. And the terminal device 2 cannot receive the data transmitted by the first node and other terminal devices on the same time-frequency resource. And the terminal device 2 cannot receive data transmitted by the second node and other terminal devices on the same time-frequency resource. And terminal device 2 cannot receive data sent by the other two terminal devices on the same time-frequency resource.

As shown in fig. 2, the terminal device 2 is associated to a first node and a second node. Since the first node and the second node are both independent to allocate the side link time frequency resource for the terminal device 2. Therefore, the first side link time frequency resource allocated by the first node for the terminal device 2 may overlap with the second side link time frequency resource allocated by the second node for the terminal device 2. For example, the time-frequency resource of the first sidelink for receiving data allocated by the first node to the terminal device 2 overlaps with the time-frequency resource of the second sidelink for transmitting data allocated by the second node to the terminal device 2. In this case, the terminal device 2 is required to simultaneously transmit and receive data. Or, the time-frequency resource of the first sidelink for receiving data allocated by the first node for the terminal device 2 overlaps with the time-frequency resource of the second sidelink for receiving data allocated by the second node for the terminal device 2. In this case, the terminal device 2 is required to receive the data sent by the device under the first sidelink and the device under the second sidelink at the same time-frequency resource. Or, the time-frequency resource of the first side link for transmitting data allocated by the first node to the terminal device 2 overlaps with the time-frequency resource of the second side link for transmitting data allocated by the second node to the terminal device 2. In this case, the terminal device 2 is required to send data to the device under the first sidelink and the device under the second sidelink in the same time-frequency resource. Therefore, in these cases, the terminal device 2 cannot normally transmit data. Therefore, two non-overlapping time-frequency resources need to be allocated to the terminal device 2 to ensure that the terminal device 2 normally transmits data.

If the terminal device 2 is a terminal device in a full duplex mode, the terminal device 2 cannot transmit data to different devices in the same time-frequency resource, and the terminal device 2 cannot receive data transmitted by different devices in the same time-frequency resource. The terminal device in the full-duplex mode may send and receive data simultaneously during communication. Therefore, if the time-frequency resource of the first sidelink for transmitting data allocated by the first node for the terminal device 2 overlaps with the time-frequency resource of the second sidelink for transmitting data allocated by the second node for the terminal device 2, the terminal device 2 may not normally transmit data. Or, if the time-frequency resource of the first sidelink for receiving data allocated by the first node for the terminal device 2 overlaps with the time-frequency resource of the second sidelink for receiving data allocated by the second node for the terminal device 2, the terminal device 2 may not normally receive data. Therefore, it is necessary to allocate non-overlapping sending time-frequency resources or non-overlapping receiving time-frequency resources to the terminal device 2 to ensure that the terminal device 2 normally transmits data.

In order to reasonably allocate time-frequency resources of side links to terminal devices associated with a plurality of nodes, in the embodiment of the application, the time-frequency resources of the side links are uniformly allocated to the terminal devices associated with the plurality of nodes through access network devices. For example, the first time-frequency resource of the first side link and the second time-frequency resource of the second side link allocated by the access network device for the terminal device 2 are not overlapped. The access network equipment sends first time-frequency resource information indicating the first time-frequency resource to the first node, and sends second time-frequency resource information indicating the second time-frequency resource to the second node. After receiving the first time-frequency resource information, the first node instructs the terminal device 2 to receive data or transmit data in the first time-frequency resource. After receiving the second time-frequency resource information, the second node instructs the terminal device 2 to receive data or send data in the second time-frequency resource. Or, the first time-frequency resource and the second time-frequency resource are time-frequency resources that do not allow the terminal device 2 to receive and transmit data, and the first time-frequency resource is an absolute complement of the second time-frequency resource. After the first node receives the first time-frequency resource information, the terminal device 2 is not allowed to receive data and transmit data in the first time-frequency resource, and the terminal device 2 is specified to receive data or transmit data in the second time-frequency resource. After the second node receives the second time-frequency resource information, the terminal device 2 is not allowed to receive data and transmit data in the second time-frequency resource, and the terminal device 2 is specified to receive data or transmit data in the first time-frequency resource.

By implementing the method described in the embodiment of the present application, the access network device does not allocate overlapping time-frequency resources to the terminal device 2, so that for the terminal device in the half-duplex mode, the situation that the terminal device needs to receive and transmit data in the same time-frequency resources, or send data to different devices in the same time-frequency resources, or receive data sent by different devices in the same time-frequency resources does not occur. For the terminal equipment in the full duplex mode, the situation that the terminal equipment needs to send data to different equipment in the same time-frequency resource or receive the data sent by different equipment in the same time-frequency resource can not be caused.

The access network device may provide communication coverage for a specific geographic area, and may communicate with a terminal device located in the coverage area, and the access network device may support communication protocols of different systems or may support different communication modes. For example, the access network device may be an evolved node B (eNB or eNodeB) in an LTE system, or a radio network controller in a Cloud Radio Access Network (CRAN), or may be an access network device in a 5G network, such as a gNB; or may be a small station, a micro station, or a Transmission Reception Point (TRP); but also relay stations, access points, or access network devices in a Public Land Mobile Network (PLMN) for future evolution, etc.

A terminal device may refer to an access terminal, User Equipment (UE), subscriber unit, subscriber station, mobile station, remote terminal, mobile terminal, user terminal, wireless communication device, user agent, or user equipment, among others. An access terminal may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication capability, a computing device or other processing device connected to a wireless modem, a vehicle mounted device, a wearable device, a terminal device in the internet of things, a virtual reality device, a terminal device in a future 5G network, a terminal device in a future evolved Public Land Mobile Network (PLMN), or the like.

The first node and the second node may also be terminal devices, or relays, or access points, or other communication devices that may be disposed between the access network device and the terminal devices.

The following further describes a resource allocation method and device provided by the present application.

Referring to fig. 3, fig. 3 is a flowchart illustrating a resource allocation method according to an embodiment of the present disclosure. As shown in fig. 3, the data transmission method includes the following steps 301 to 308, wherein:

301. the terminal device sends a first request to the first node.

Wherein the first request is for requesting an association to be established with the first node. For example, the terminal device may be the terminal device 2 in fig. 2. Specifically, the terminal device sends the first request to the first node through the first sidelink.

302. The first node sends a first message to the access network device.

In this embodiment of the application, after receiving the first request from the terminal device, the first node establishes an association relationship with the terminal device, and sends the first message to the access network device through an air interface of the cellular network. The first message is used to indicate that the terminal device is associated with the first node. Or after receiving the first request from the terminal device, the first node sends a first message to the access network device through the air interface of the cellular network, where the first message is used to instruct the terminal device to request to associate with the first node.

The first message may be generated and sent by the first node to the access network device after the first node receives the first request. Or the first message may be generated by the terminal device and sent to the first node in the first request.

Optionally, the first message further includes an identifier of the terminal device. The identity of the terminal device may be an identity of the terminal device on the first sidelink. For example, the identifier of the terminal device on the first side link may be at least one of a Layer 2(Layer 2, L2) identifier, an Internet Protocol (IP) address, and the like. The L2 identifier may be a near field communication (ProSe) UE ID, a connection (connection) ID, or a Media Access Control (MAC) address. Alternatively, the identity of the terminal device may be a cellular network identity of the terminal device. For example, the cellular network identifier of the terminal device may be composed of a cell radio network temporary identifier (C-RNTI) and a cell identifier. Alternatively, the identification of the terminal device may be a station identification (station ID) for uniquely identifying the terminal device. For example, the terminal device, when requesting to associate with the first node, includes a station ID in the first request, for example, the station ID is included in the application layer or V2X layer or MAC header; the terminal device also includes the station ID in the second request when requesting association with the second node, for example, the station ID is included in the application layer or V2X layer or the MAC header. When the subsequent first node sends a first message to the access network equipment, the first message contains the stationID; when the second node sends the second message to the access network device, the second message also contains the station ID.

Optionally, after receiving the first request, the first node further needs to send a response message for the first request to the terminal device. The first node may send a response message for the first request to the terminal device first, and then send the first message to the access network device. Alternatively, the first node may send the first message to the access network device first, and then send a response message for the first request to the terminal device.

303. The terminal device sends a second request to the second node.

Wherein the second request is for requesting an association to be established with the second node. Specifically, the terminal device sends the second request to the second node through the second sidelink.

304. The second node sends a second message to the access network device.

In this embodiment of the application, after receiving the second request from the terminal device, the second node establishes an association relationship with the terminal device, and sends the second message to the access network device through an air interface of the cellular network. The second message is used to indicate that the terminal device is associated with the second node. Or after receiving the second request from the terminal device, the second node sends a second message to the access network device through the air interface of the cellular network, where the second message is used to instruct the terminal device to request to associate with the second node.

The second message may be generated by the second node and sent to the access network device after the second node receives the second request. Or the second message may be generated by the terminal device and sent to the second node in the second request.

Optionally, the second message further includes an identifier of the terminal device. The identity of the terminal device may be an identity of the terminal device at the second sidelink. For example, the identifier of the terminal device on the second side link may be at least one of a Layer 2(Layer 2, L2) identifier, an Internet Protocol (IP) address, and the like. The L2 identifier may be a near field communication (ProSe) UE ID, a connection (connection) ID, or a Media Access Control (MAC) address. Alternatively, the identity of the terminal device may be a cellular network identity of the terminal device. For example, the cellular network identifier of the terminal device may be composed of a cell radio network temporary identifier (C-RNTI) and a cell identifier. Alternatively, the identification of the terminal device may be a station identification (station ID) for uniquely identifying the terminal device. Optionally, after receiving the second request, the second node further sends a response message for the second request to the terminal device. The second node may send a response message for the second request to the terminal device first, and then send the second message to the access network device. Alternatively, the second node may send the second message to the access network device first, and then send a response message for the second request to the terminal device.

305. The access network equipment allocates a first time-frequency resource of a first side link for the terminal equipment.

306. And the access network equipment allocates a second time-frequency resource of a second side link for the terminal equipment.

In the embodiment of the application, after the access network device receives the first message from the first node and receives the second message from the second node, the access network device allocates the first time-frequency resource of the first side link and the second time-frequency resource of the first side link to the terminal device. Wherein the first time frequency resource and the second time frequency resource are not overlapped.

The step 305 may be performed first and then the step 306 is performed, or the step 306 may be performed first and then the step 305 is performed.

307. The access network equipment sends the first time-frequency resource information to the first node.

For example, the access network device sends, to the first node, an identifier of the terminal device on the first side link and first time-frequency resource information through a Radio Resource Control (RRC) reconfiguration message, so that the first node knows that the first time-frequency resource indicated by the first time-frequency resource information is configured for the terminal device.

308. And the access network equipment sends the second time-frequency resource information to the second node.

For example, the access network device sends the identifier of the terminal device on the second sidelink and the second time-frequency resource information to the second node through the RRC reconfiguration message, so that the second node knows that the second time-frequency resource indicated by the second time-frequency resource information is configured for the terminal device.

The step 307 and the step 308 may be executed first, or the step 308 and the step 307 may be executed first.

In the embodiment of the application, after the access network device allocates the first time-frequency resource and the second time-frequency resource to the terminal device, the access network device sends the first time-frequency resource information to the first node and sends the second time-frequency resource information to the second node. The first time-frequency resource information indicates a first time-frequency resource, and the second time-frequency resource information indicates a second time-frequency resource.

In the method described in fig. 3, the terminal device may be a terminal device in a half-duplex mode or a terminal device in a full-duplex mode.

As an optional implementation manner, if the terminal device is a terminal device in a half-duplex mode, the first time-frequency resource receives data or transmits data, and the second time-frequency resource is used for the terminal device to receive data or transmit data.

For example, the first time-frequency resource is a time-frequency resource used for the terminal device to receive data, and the second time-frequency resource is a time-frequency resource used for the terminal device to transmit data. After the first node receives the first time-frequency resource information, the terminal equipment is appointed to receive data in the first time-frequency resource. And after the second node receives the second time frequency resource information, the second node appoints the terminal equipment to send data in the second time frequency resource.

Or, the first time-frequency resource is a time-frequency resource used for the terminal device to transmit data, and the second time-frequency resource is a time-frequency resource used for the terminal device to receive data. And after the first node receives the first time-frequency resource information, the first node appoints the terminal equipment to transmit data in the first time-frequency resource. And after the second node receives the second time frequency resource information, the terminal equipment is appointed to receive data in the second time frequency resource.

Or, the first time-frequency resource is a time-frequency resource used for the terminal device to transmit data, and the second time-frequency resource is a time-frequency resource used for the terminal device to transmit data. And after the first node receives the first time-frequency resource information, the first node appoints the terminal equipment to transmit data in the first time-frequency resource. And after the second node receives the second time frequency resource information, the second node appoints the terminal equipment to send data in the second time frequency resource.

Or, the first time-frequency resource is a time-frequency resource for the terminal device to receive data, and the second time-frequency resource is a time-frequency resource for the terminal device to receive data. After the first node receives the first time-frequency resource information, the terminal equipment is appointed to receive data in the first time-frequency resource. And after the second node receives the second time frequency resource information, the terminal equipment is appointed to receive data in the second time frequency resource.

Therefore, the receiving time-frequency resource and the sending time-frequency resource of the terminal equipment can be staggered in the optional mode, or two sending time-frequency resources of the terminal equipment can be staggered, or two receiving time-frequency resources of the terminal equipment can be staggered, so that the terminal equipment can normally transmit data.

As an optional implementation manner, if the terminal device is a terminal device in a half-duplex mode, the first time-frequency resource is a time-frequency resource that does not allow the terminal device to receive data nor allow the terminal device to transmit data, the second time-frequency resource is a time-frequency resource that does not allow the terminal device to receive data nor allow the terminal device to transmit data, and the first time-frequency resource is an absolute complement of the second time-frequency resource.

And after the first node receives the first time-frequency resource information, the first node appoints the terminal equipment to receive or send data in the second time-frequency resource. And after the second node receives the second time-frequency resource information, the appointed terminal equipment receives or sends data in the first time-frequency resource.

Therefore, the receiving time-frequency resources and the sending time-frequency resources of the terminal equipment can be staggered in the optional mode, or the sending time-frequency resources of the terminal equipment can be staggered, or the receiving time-frequency resources of the terminal equipment can be staggered.

Optionally, if the terminal device is a terminal device in a full duplex mode, the first time-frequency resource is used for the terminal device to receive data, and the second time-frequency resource is used for the terminal device to receive data. After the first node receives the first time-frequency resource information, the terminal equipment is appointed to receive data in the first time-frequency resource. And after the second node receives the second time frequency resource information, the terminal equipment is appointed to receive data in the second time frequency resource. Or, the first time-frequency resource is used for the terminal device to send data, and the second time-frequency resource is used for the terminal device to send data. And after the first node receives the first time-frequency resource information, the first node appoints the terminal equipment to transmit data in the first time-frequency resource. And after the second node receives the second time frequency resource information, the second node appoints the terminal equipment to send data in the second time frequency resource. Therefore, by the optional mode, the sending time frequency resources of the terminal equipment can be staggered, or the receiving time frequency resources of the terminal equipment can be staggered.

Optionally, if the terminal device is a terminal device in a full duplex mode, the first time-frequency resource is a time-frequency resource that does not allow the terminal device to receive data nor allow the terminal device to transmit data, the second time-frequency resource is a time-frequency resource that does not allow the terminal device to receive data nor allow the terminal device to transmit data, and the first time-frequency resource is an absolute complement of the second time-frequency resource.

And after the first node receives the first time-frequency resource information, the first node appoints the terminal equipment to receive or send data in the second time-frequency resource. And after the second node receives the second time-frequency resource information, the appointed terminal equipment receives or sends data in the first time-frequency resource. Therefore, by the optional mode, the sending time frequency resources of the terminal equipment can be staggered, or the receiving time frequency resources of the terminal equipment can be staggered.

It can be seen that, by implementing the method described in fig. 3, non-overlapping time-frequency resources can be uniformly allocated to the terminal device by the access network device, thereby ensuring that the terminal device can normally perform data transmission. Therefore, by implementing the method described in fig. 3, time-frequency resources can be reasonably allocated to the terminal device.

As an optional implementation manner, the first message further includes an identifier of the terminal device on the first sidelink, or the second message further includes an identifier of the terminal device on the second sidelink, as shown in fig. 4, the access network device may further perform the following steps:

405. and the access network equipment acquires the capability information of the terminal equipment according to the identifier of the terminal equipment on the first side link or the identifier of the terminal equipment on the second side link.

406. And the access network equipment determines that the terminal equipment is the terminal equipment in the half-duplex mode according to the capability information of the terminal equipment.

In this embodiment, the access network device may store in advance a mapping relationship between an identifier of the terminal device on the first side link and a cellular network identifier of the terminal device, and store in advance a mapping relationship between an identifier of the terminal device on the second side link and a cellular network identifier of the terminal device. For example, when the terminal device accesses the access network device, the identifier of the terminal device on the first sidelink and the identifier of the terminal device on the second sidelink may be reported to the access network device. Then the access network equipment distributes cellular network identification for the terminal equipment, and stores the mapping relation between the identification of the terminal equipment on the first side link and the cellular network identification of the terminal equipment, and stores the mapping relation between the identification of the terminal equipment on the second side link and the cellular network identification of the terminal equipment. After the access network device receives the first message, the access network device may obtain the identifier of the terminal device on the first side link from the first message, and obtain the cellular network identifier corresponding to the terminal device according to the mapping relationship between the identifier of the terminal device on the first side link and the cellular network identifier, which is stored in advance. Or after the access network device receives the second message, the access network device may obtain the identifier of the terminal device in the second side link from the second message, and obtain the cellular network identifier corresponding to the terminal device according to the mapping relationship between the identifier of the terminal device in the second side link and the cellular network identifier, which is stored in advance. After the access network equipment acquires the cellular network identification of the terminal equipment, the pre-stored capability information of the terminal equipment is acquired according to the cellular network identification. If the access network device does not store the capability information of the terminal device, the access network device can request the terminal device to acquire the capability information according to the cellular network identifier of the terminal device. The access network equipment can determine whether the terminal equipment is the terminal equipment in the half-duplex mode according to the capability information of the terminal equipment.

By implementing the implementation mode, the access network equipment can acquire the capability information of the terminal equipment, and further determine that the terminal equipment is the terminal equipment in the half-duplex mode according to the capability information of the terminal equipment.

The embodiment of the application also provides an interference coordination method and equipment, which can carry out interference coordination.

In order to better understand the embodiments of the present application, a communication system to which the embodiments of the present application are applicable is described below.

Fig. 5 and fig. 6 are schematic diagrams of a communication system according to an embodiment of the present application. As shown in fig. 5 and 6, the communication system includes a first access network device, a second access network device, a first node, a second node, and a terminal device.

The first access network device is used for managing the first node, and the second access network device is used for managing the second node. The first access network device may be the same as or different from the second access network device. Fig. 5 is a schematic diagram of a first access network device being different from a second access network device. Fig. 6 is a schematic diagram of the first access network device being identical to the second access network device. Fig. 5 and fig. 6 take the communication system including 4 terminal devices as an example, and of course, the communication system may further include more than 4 terminal devices or less than 4 terminal devices, which is not limited in this embodiment of the present application.

The first access network equipment communicates with the first node through a cellular network air interface, and the second access network equipment communicates with the second node through the cellular network air interface; the first node and the terminal device communicate via a first sidelink (sidelink) and the second node and the terminal device communicate via a second sidelink.

The first node is used for allocating the time-frequency resource of the first side link for the terminal equipment under the first node. The second node is used for allocating the time-frequency resource of the second side link for the terminal equipment under the second node. The terminal device under the first node refers to a terminal device associated with the first node. The terminal device under the second node refers to a terminal device associated with the second node. As shown in fig. 5 and 6, terminal device 1 and terminal device 2 are associated with a first node, and terminal device 3 and terminal device 4 are associated with a second node. The first node is responsible for allocating the first time-frequency resource of the first side link for the terminal device 1 and the terminal device 2. The second node is responsible for allocating second time-frequency resources of the second sidelink to the terminal device 3 and the terminal device 4. Wherein the first time frequency resource and the second time frequency resource have an overlap. Optionally, the first time-frequency resource and the second time-frequency resource may be allocated by the access network device. Or, the first time-frequency resource may be determined after the first node performs channel sensing by itself, and the second time-frequency resource may be determined after the second node performs channel sensing by itself.

Since the first time frequency resource and the second time frequency resource have an overlap. Then, a terminal device in area 1 may receive a signal and may be interfered by a signal transmitted by a second node or terminal device in area 2. Alternatively, a first node in area 1 may receive a signal and may be interfered by a signal transmitted by a second node or terminal device in area 2.

For example, as shown in fig. 7, the first node transmits a signal to the terminal device 2 through the first sidelink on a certain time-frequency resource, and the terminal device 3 also transmits a signal to the second node through the second sidelink on the same time-frequency resource. The signal transmitted by terminal device 3 may interfere with the reception by terminal device 2.

For another example, as shown in fig. 8, the first node sends a signal to the terminal device 2 through the first sidelink on a certain time-frequency resource, and the second node also sends a signal to the terminal device 3 through the second sidelink on the same time-frequency resource. The signal transmitted by the second node may also interfere with the reception by the terminal device 2.

For another example, as shown in fig. 9, the terminal device 2 sends a signal to the first node through the first sidelink on a certain time frequency resource, and the terminal device 3 also sends a signal to the second node through the second sidelink on the same time frequency resource. The signal transmitted by the terminal device 3 may interfere with the reception of the first node.

For another example, as shown in fig. 10, the terminal device 2 sends a signal to the first node through the first sidelink on a certain time-frequency resource, and the second node also sends a signal to the terminal device 3 through the second sidelink on the same time-frequency resource. The signal transmitted by the second node may interfere with the reception of the first node.

Fig. 7 to fig. 10 take the example that the first access network device is different from the second access network device, and the same process is performed when the first access network device is the same as the second access network device, which is not described herein again.

In order to perform interference coordination when a first node or a terminal device managed by the first node is interfered by a signal, an embodiment of the present application provides an interference coordination method and device.

The following further describes an interference coordination method and an apparatus provided in the present application.

Referring to fig. 11, fig. 11 is a flowchart illustrating an interference coordination method according to an embodiment of the present disclosure. As shown in fig. 11, the interference coordination method includes the following steps 1101-1103, wherein:

1101. the first node determines a second node.

The first node is responsible for allocating a first time-frequency resource of a first side link to terminal equipment under the first node, the second node is responsible for allocating a second time-frequency resource of a second side link to terminal equipment under the second node, the first time-frequency resource and the second time-frequency resource have overlapped resources, the first node is managed by first access network equipment, and the second node is managed by second access network equipment.

As mentioned above, the first time-frequency resource and the second time-frequency resource may be allocated by the access network device. Or, the first time-frequency resource may be determined after the first node performs channel sensing by itself, and the second time-frequency resource may be determined after the second node performs channel sensing by itself. The first access network device and the second access network device may be the same or different.

That is, in step 1101, the first node needs to determine a second node having overlapping sidelink time-frequency resources with the first node.

Alternatively, the first node may determine the second node in the following two ways.

The first method is as follows: each node may broadcast a discovery message on a sidelink, which may indicate that the corresponding node is responsible for allocating sidelink time-frequency resources for its associated terminal device. For example, the discovery message includes a scheduling group head indication, which is used to indicate that the node is responsible for allocating sidelink time-frequency resources for its associated terminal equipment. And the discovery message may indicate the sidelink time-frequency resources that the corresponding node has. After the first node hears the discovery message, it may determine whether the node sending the discovery message is the second node based on the discovery message. For example, after the first node listens to the discovery message broadcast by node 2, the first node may determine, according to the discovery message, the sidelink time-frequency resource that node 2 has, and determine that node 2 is responsible for allocating the sidelink time-frequency resource for its associated terminal device. If the first node determines that the side link time frequency resource of the node 2 overlaps with the first time frequency resource of the first node, the first node determines that the node 2 is the second node.

The second method comprises the following steps: each node may broadcast a discovery message on the time-frequency resources it has, which may indicate that the corresponding node is responsible for allocating sidelink time-frequency resources for its associated terminal device. If the first node hears the discovery message at the first time-frequency resource, the first node determines that the node sending the discovery message is the second node.

The third method comprises the following steps: the second node is indicated to the first section by the first access network device. In particular, the first access network device may send second information to the first node, the second information indicating the second node. For example, the second information comprises an identification of the second node. After the first node receives the second information, the second node may be determined based on the second information.

Optionally, the second information not only indicates the second node, but also includes first time-frequency resource information for indicating the first time-frequency resource. That is, the first time-frequency resource is allocated for the first access network device to the first node. Optionally, the first time-frequency resource information includes one or more of carrier information, resource pool information, subchannel information, resource block information, frame number, subframe number, and time slot. The carrier information may be carrier identification or frequency point information. The resource pool may be a frequency domain resource composed of one or more radio Resource Blocks (RBs), or a time-frequency domain resource composed of one or more RBs on a particular subframe or set of subframes. There may be one or more resource pools on each carrier. The resource pool may also be divided into a transmit resource pool and a receive resource pool. And the resources in the receiving resource pool are used for receiving data, and the resources in the sending resource pool are used for sending data. Wherein, the resource pool information may include the following information: 1) a sidelink-offset Indicator, i.e., an indication of sidechain offset. An offset of the resource pool relative to a cell System Frame Number (SFN) when the UE is within a cell coverage; an offset of the resource pool with respect to a Direct Frame Number (DFN) when the UE is out of cell coverage; 2) a side link subframe contained in the resource pool; 3) the number of Physical Resource Blocks (PRBs) included in each subchannel; wherein the total bandwidth for the transmission channel is divided into several sub-bands, one sub-band may be referred to as one sub-channel. One subchannel may include one or more PRBs. Herein, the PRB throughout the embodiments of the present application is the name of RB in the physical layer. 4) The number of sub-channels; 5) a starting RB index of a physical side link control channel; 6) whether a Physical Sidelink Control Channel (PSCCH) and a physical sidelink shared channel (PSCCH) are adjacent in the frequency domain. The fact that the PSCCH and the PSSCH are adjacent in the frequency domain means that the PSCCH and the PSSCH have no interval in the frequency domain.

For example, the format and included content of the second information may be as shown in table 1 below. As shown in table 1 below, the second information includes carrier identification and resource pool information. The second information further includes one or more node identifications and a resource pool overlap indication. As shown in table 1 below, each node identifier corresponds to one resource overlap indication in the second information. The value of the resource overlap indication may be 0 or 1, or the value of the resource overlap indication true or false. For example, the first node is node 1. The list of nodes in table 1 includes node 2 and node 3. And if the value of the resource overlapping indication corresponding to the node 2 is 0 or false, it indicates that the node 1 and the node 2 do not have overlapped side link time-frequency resources. If the resource overlapping indication value of the node 2 is 1 or true, it indicates that the node 1 and the node 2 have overlapping side link time-frequency resources. Then node 2 is the second node. Similarly, if the value of the resource overlap indication corresponding to the node 3 is 0 or false, it indicates that there is no overlapped side link time-frequency resource between the node 1 and the node 3. If the resource overlapping indication value of the node 3 is 1 or true, it indicates that the node 1 and the node 3 have overlapping side link time-frequency resources. Then node 3 is the second node. It is worth mentioning that there may be a plurality of nodes as the second node.

TABLE 1

>Carrier list
	>>Carrier identification
>>Resource pool list
	>>>Resource pool information
>Node list
	>>Node identification
>>Resource overlap indication

Wherein, the node identifier in table 1 may be the L2 identifier of the node in the side link. For example, the UE ID may be a C-RNTI of the node in the cellular network, a cell identity, or a MAC address or an IP address of the node.

As an optional implementation manner, the second information may indicate not only the second node, but also the overlapping resources that the first time-frequency resource and the second time-frequency resource have. Optionally, the second information may specifically indicate one or more of carriers, resource pools, sub-channels, resource blocks, frames, subframes, and time slots where the first time-frequency resources and the second time-frequency resources overlap. Herein, the carrier, resource pool, subchannel, resource block, frame, subframe and slot may refer to a carrier, resource pool, subchannel, resource block, frame, subframe and slot in an LTE or NR system. By indicating the overlapping resources of the first time-frequency resource and the second time-frequency resource, the first node can screen the second node according to the overlapping resources and only send the first information to part of the second nodes, which is beneficial to saving transmission resources. For example, if the third time-frequency resource is a time-frequency resource interfered by a signal of the first device, the first device is the first node or a terminal device managed by the first node. The first node may determine a target second node from the plurality of second nodes, where the time-frequency resource and the third time-frequency resource have an overlap, according to the overlapping resource. I.e. the target second node or the terminal device managed by the target second node causes interference to the first device. After the first node determines the target second node, only the first information needs to be sent to the target second node.

For example, the second information specifically indicates the carriers that the first node overlaps with the second node. The access network device may transmit the second information in the format of table 2 below to indicate carriers on which the first node overlaps with the second node. As shown in table 2 below, one carrier id corresponds to one node list. With one or more node identifications under the node list. Each node identification corresponds to a resource overlap indication. The value of the resource overlap indication may be 0 or 1, or the value of the resource overlap indication true or false. For example, the first node is node 1, the carrier identifier in table 2 below is the identifier of carrier 1, and the node list includes the identifier of node 2. If the value of the resource overlapping indication corresponding to the identifier of the node 2 is 0 or false, it indicates that the node 1 and the node 2 are not overlapped on the carrier 1. If the resource overlapping indication of the node 2 takes a value of 1 or true, it indicates that the node 1 and the node 2 overlap on the carrier 1. Then node 2 is the second node.

TABLE 2

>Carrier list
	>>Carrier identification
>>Node list
	>>>Node identification
>>>Resource overlap indication
	>>Resource pool list
>>>Resource pool information

For another example, the second information specifically indicates the carrier and the resource pool where the first node overlaps with the second node. The access network device may transmit the second information in the format of table 3 below to indicate carriers and resource pools where the first node overlaps with the second node. As shown in table 3 below, one carrier identifier corresponds to one resource pool list, and one resource pool list has one or more resource pool information. Each resource pool information corresponds to a node list. With one or more node identifications under the node list. Each node identification corresponds to a resource overlap indication. The value of the resource overlap indication may be 0 or 1, or the value of the resource overlap indication true or false. For example, the first node is node 1, the carrier identifier in table 2 below is an identifier of carrier 1, the resource pool information is information of resource pool 1, and the node list includes an identifier of node 2. If the value of the resource overlapping indication corresponding to the identifier of the node 2 is 0 or false, it indicates that the side link time-frequency resources of the node 1 and the node 2 are not overlapped on the resource pool 1 of the carrier 1. If the resource overlapping indication value of the node 2 is 1 or true, it indicates that the side link time-frequency resources of the node 1 and the node 2 are overlapped on the resource pool 1 of the carrier 1. Then node 2 is the second node.

TABLE 3

>Carrier list
	>>Carrier identification
>>Resource pool list
	>>>Resource pool information
>>>Node list
	>>>>Node identification
>>>>Resource overlap indication

The second information indicates the same reason of the sub-channel, resource block, frame, sub-frame and time slot where the first time-frequency resource and the second time-frequency resource are overlapped, and is not repeated here. Of course, the second information may not indicate a sidelink time frequency resource where the first time frequency resource and the second time frequency resource overlap. For example, the first access network device may send the second information in the format of table 1 above, so that the first node may only determine the first time-frequency resource and the second node according to the second information in the format of table 1 above, and may not determine the specific resource where the first node overlaps with the second node.

1102. The first node sends the first information to the second node.

After the first node determines the second node, the first node sends the first information to the second node. The first information is used for indicating a third time-frequency resource for interference coordination. The third time frequency resource is all or part of the overlapped resource of the first time frequency resource and the second time frequency resource.

1103. And the second node performs interference coordination according to the first information.

In the embodiment of the present application, after receiving the first information, the second node performs interference coordination according to the first information.

By implementing the method described in fig. 11, the first node can determine a second node having overlapping side link time frequency resources, and send first information indicating a third time frequency resource for interference coordination to the second node. So that the second node can perform interference coordination according to the first information. It can be seen that interference coordination can be performed by implementing the method described in fig. 11.

As an optional implementation manner, the third time frequency resource is a time frequency resource interfered by a signal of the first node or a terminal device under the first node. The specific implementation manner of the second node performing interference coordination according to the first information may include the following three manners:

the first method is as follows: and the second node determines a third time-frequency resource according to the first information. And the second node schedules the terminal equipment with the distance to the second node less than the preset distance on the frequency domain resource of the third time frequency resource. And the second node does not schedule the terminal equipment with the distance to the second node greater than the preset distance on the frequency domain resource of the third time frequency resource. Due to the close distance between the second node and the scheduled terminal device, the second node or the scheduled terminal device can reduce the transmission power, thereby reducing the interference to the first node or the terminal device under the first node.

And the equipment with the distance to the second node smaller than the preset distance is cell center equipment. And the equipment with the distance to the second node greater than the preset distance is cell edge equipment. In the first mode, the second node only schedules the cell center device subsequently on the frequency domain resource of the third time frequency resource. The cell center device is far away from the first node interfered by the signal or the terminal device interfered by the signal under the first node, so that the cell center device is not easy to cause interference to the first node or the terminal device under the first node on the frequency domain resource of the third time frequency resource.

The second method comprises the following steps: and the second node determines a third time-frequency resource according to the first information. And the second node determines interference source equipment causing interference to the first node or the terminal equipment under the first node according to the third time-frequency resource. And the second node determines the subsequent fourth time frequency resource of the interference source equipment and sends fourth time frequency resource information used for indicating the fourth time frequency resource to the first node. After receiving the fourth time-frequency resource information, the first node may adjust subsequent time-frequency resource information of the first node interfered by the signal or the terminal device interfered by the signal under the first node to a fifth time-frequency resource, where the fifth time-frequency resource is different from the fourth time-frequency resource.

In the sidelink communication, two transmission modes are mainly included, namely a scheduling mode and a UE selection mode. When the terminal equipment managed by the first node adopts a UE selection mode, the terminal equipment selects a proper resource pool from a sending resource pool and/or a receiving resource pool broadcasted by the first node for communication after channel sensing by itself, or selects a proper resource pool from a pre-configured sending resource pool and/or receiving resource pool for communication. When the terminal device managed by the first node adopts a Scheduling mode, the first node dynamically allocates a one-time resource or a Semi-Persistent Scheduling (SPS) resource to the terminal device. Therefore, in the second mode, if the terminal device interfered by the signal under the first node is the terminal device adopting the scheduling mode, after the first node receives the fourth time-frequency resource information, the first node may allocate the fifth time-frequency resource to the terminal device interfered by the signal under the first node in a dynamic allocation mode or a semi-static scheduling mode. If the terminal device interfered by the signal under the first node is the terminal device adopting the UE selection mode, after the first node receives the fourth time-frequency resource information, the terminal device interfered by the signal under the first node can be informed to subsequently adopt the fifth time-frequency resource, or the terminal device interfered by the signal under the first node is informed to subsequently avoid the fourth time-frequency resource.

In the second mode, the second node may determine the device that uses the third time-frequency resource to transmit data as the interference source device. The interference source device may be the second node or a terminal device managed by the second node.

In the second mode, the second node may notify the first node of the subsequent time-frequency resources of the second device without adjusting the subsequent time-frequency resources of the second device, and the first node adjusts the subsequent time-frequency resources of the first node interfered by the signal or the terminal device interfered by the signal under the first node, so that the subsequent time-frequency resources of the first node interfered by the signal or the terminal device interfered by the signal under the first node avoid the subsequent time-frequency resources of the second device.

The third method comprises the following steps: and the second node determines a third time-frequency resource according to the first information. And the second node determines the interference source equipment according to the third time-frequency resource. And the second node adjusts the subsequent time frequency resource of the interference source equipment into a fourth time frequency resource, wherein the frequency domain resource of the fourth time frequency resource is different from the frequency domain resource of the third time frequency resource. In this way, the first node may subsequently continue to schedule the first node interfered by the signal or the terminal device interfered by the signal under the first node on the frequency domain resource of the third time frequency resource.

In the third mode, the second node may determine a device that transmits data using the third time-frequency resource as an interference source device. The interference source device may be the second node or a terminal device managed by the second node.

In the third mode, the first node does not need to adjust the first node interfered by the signal or the terminal equipment interfered by the signal under the first node to prepare subsequent time-frequency resources. And the second node adjusts the time frequency resource of the interference source equipment, so that the subsequent time frequency resource of the interference source equipment avoids the first node interfered by the signal or the subsequent time frequency resource of the terminal equipment interfered by the signal under the first node.

As an optional implementation manner, the third time frequency resource is a time frequency resource interfered by a signal of the first node or a terminal device under the first node. The first information further indicates a fifth time-frequency resource subsequent to the first device. The specific implementation manner of the second node performing interference coordination according to the first information is as follows: and the second node determines a third time frequency resource and a fifth time frequency resource according to the first information. And the second node determines interference source equipment according to the third time-frequency resource, wherein the interference source equipment causes interference to the first node or terminal equipment under the first node. And the second node adjusts the subsequent time frequency resource of the interference source equipment into a fourth time frequency resource, wherein the fourth time frequency resource is different from the fifth time frequency resource.

In this optional implementation, if the interferer device is a terminal device employing a scheduling mode, the second node may allocate the fourth time-frequency resource to the interferer device in a dynamic allocation manner or a semi-static scheduling manner. If the interference source device is a terminal device adopting the UE selection mode, the second node may notify the interference source device to subsequently adopt the fourth time-frequency resource, or notify the interference source device to subsequently avoid the fifth time-frequency resource.

In this optional implementation, the first node does not need to adjust the time-frequency resource subsequent to the first node interfered by the signal or the terminal device interfered by the signal under the first node. The first node only needs to inform the second node of the first node interfered by the signal or the subsequent time frequency resource of the terminal equipment interfered by the signal under the first node. And the second node adjusts the time frequency resource of the interference source equipment, so that the subsequent time frequency resource of the interference source equipment avoids the first node interfered by the signal or the subsequent time frequency resource of the terminal equipment interfered by the signal under the first node.

As an optional implementation manner, the third time-frequency resource is a time-frequency resource interfered by a signal of a terminal device under the first node. As shown in fig. 12, before the first node sends the first information to the second node, the following steps may also be performed:

1202. And the terminal equipment under the first node sends the third information to the first node.

The terminal device under the first node may send the third information to the first node after detecting that the terminal device is interfered by the signal. The third information is used for indicating one or more of a carrier wave interfered by a signal of the terminal equipment under the first node, a resource pool interfered by the signal of the terminal equipment under the first node, a sub-channel interfered by the signal of the terminal equipment under the first node, a resource block interfered by the signal of the first equipment, and a frame, a sub-frame or a time slot interfered by the signal of the terminal equipment under the first node.

1203. And the first node determines a third time-frequency resource according to the third information.

Specifically, after receiving the third information from the first device, the first node determines the third time-frequency resource according to the third information.

For example, if the first node only allocates a single sub-channel or a single PRB under a certain carrier for the terminal device under the first node. Then, the third information sent by the terminal device under the first node only needs to indicate that the terminal device is interfered by the signal, and does not need to indicate the resource interfered by the signal, and the first node can also determine the interfered third time-frequency resource of the terminal device. For example, the first node allocates only subchannel 1 or PRB1 on carrier 1 to terminal devices under the first node. The third information sent by the terminal device to the first node only needs to indicate that the terminal device is interfered by the signal. The first node, having received this third information, can determine that the terminal device is interfered with sub-channel 1 or PRB1 on carrier 1.

If the first node allocates a single sub-channel or a single PRB for carrier 1, a single sub-channel or a single PRB for carrier 2 for the terminal equipment under the first node. Then, the third information sent by the terminal device only needs to indicate the interfered carrier, and the first node can determine the interfered third time-frequency resource of the terminal device according to the third information. For example, if the first node allocates subchannel 1 or PRB1 for carrier 1, subchannel 2 or PRB2 for carrier 2 for a terminal device under the first node. The third information sent by the terminal device indicates that the interfered carrier is carrier 1. The first node, having received this third information, can determine that the terminal device is interfered with sub-channel 1 or PRB1 on carrier 1.

If the first node allocates a plurality of subchannels or a plurality of PRBs under the certain carrier to the terminal device under the first node, the third information sent by the terminal device only needs to indicate the interfered subchannels or PRBs. The first node can determine the interfered third time-frequency resource of the terminal equipment according to the third information. For example, if the first node allocates subchannel 1, subchannel 2 or PRB1, PRB2 for carrier 1 to the terminal device under the first node. The third information sent by the terminal device indicates that the interfered sub-channel is sub-channel 1. After receiving the third information, the first node can determine that the terminal device is interfered with the sub-channel 1 under the carrier 1.

If the first node allocates a single sub-channel or a single PRB of the resource pool 1, a single sub-channel or a single PRB of the resource pool 2 under the determined carrier to the terminal equipment under the first node. Then, the third information sent by the terminal device only needs to indicate the interfered resource pool, and the first node can determine the interfered third time-frequency resource of the terminal device according to the third information. For example, if the first node allocates subchannel 1 or PRB1 of resource pool 1 for carrier 1 and subchannel 2 or PRB2 of resource pool 2 for a terminal device under the first node. And the third information sent by the terminal equipment indicates that the interfered resource pool is the resource pool 1. The first node, having received this third information, can then determine that the terminal device is interfered with in sub-channel 1 or PRB1 of resource pool 1 of carrier 1.

If the first node allocates a single sub-channel or a single PRB of resource pool 1 in carrier 1 to the terminal device under the first node, and a single sub-channel or a single PRB of resource pool under other carriers. Then, the third information sent by the terminal device only needs to indicate the interfered carrier and the resource pool, and the first node can determine the interfered third time-frequency resource of the terminal device according to the third information. For example, if the first node allocates subchannel 1 or PRB1 of resource pool 1 for carrier 1 and subchannel 2 or PRB2 of resource pool 2 for carrier 2 for the terminal device under the first node. The third information sent by the terminal device indicates that the interfered carrier is carrier 1, and the interfered resource pool is resource pool 1. The first node, having received this third information, can then determine that the terminal device is interfered with in sub-channel 1 or PRB1 of resource pool 1 of carrier 1.

If the terminal device under the first node is allocated by the first node several sub-channels or PRBs under several resource pools under several carriers. Then the third information sent by the terminal device needs to indicate the interfered carrier, resource pool and sub-channel, or the third information sent by the terminal device needs to indicate the carrier label, resource pool and PRB. For example, if the first node allocates subchannel 1 and subchannel 2 of resource pool 1 under carrier 1, and subchannel 3 and subchannel 4 of resource pool 2 under carrier 2 for the terminal device under the first node. The third information sent by the terminal device indicates that the interfered carrier is carrier 1, the interfered resource pool is resource pool 1, and the interfered sub-channel is sub-channel 1. After receiving the third information, the first node can determine that the terminal device is interfered in sub-channel 1 of resource pool 1 of carrier 1.

As an optional implementation manner, if the third time-frequency resource is a time-frequency resource interfered by a signal of the first node or a terminal device under the first node, the first information may include an Overload Indication (OI) bitmap, and the first information indicates the third time-frequency resource through an OI bitmap. In the OI bitmap, each bit corresponds to one PRB or one subchannel. When the bit value is 1, it indicates that the corresponding PRB or subchannel is strongly interfered, otherwise it is not strongly interfered.

As an optional implementation manner, the third time-frequency resource may also be a time-frequency resource which is not interfered by the first node or the terminal device under the first node. For example, the third time-frequency resource may be a time-frequency resource sensitive to low interference of the terminal device under the first node, that is, the terminal device under the first node in the third time-frequency resource can only bear smaller interference and cannot bear larger interference. The first information may include a High Interference Indication (HII) bitmap, and the first information indicates the third time-frequency resource through the HII bitmap. HII is also one bit per PRB or per subchannel. When the bit value is 1, it indicates that the terminal device under the first node is sensitive to high interference in the corresponding PRB or subchannel, otherwise it is sensitive to low interference.

In this optional implementation, the specific implementation manner that the second node performs interference coordination according to the first information may be: and the second node schedules the terminal equipment with the distance to the second node less than the preset distance on the third time frequency resource. And the second node schedules the terminal equipment with the distance to the second node greater than the preset distance on the time frequency resources except the third time frequency resource.

And the equipment with the distance to the second node smaller than the preset distance is cell center equipment. And the equipment with the distance to the second node greater than the preset distance is cell edge equipment. In this alternative embodiment, the second node subsequently schedules only the cell center device on the frequency domain resource of the third time-frequency resource. The cell center device is far away from the terminal device under the first node, so that the cell center device is not easy to cause interference to the terminal device under the first node on the frequency domain resource of the third time-frequency resource.

Referring to fig. 13, fig. 13 is a schematic structural diagram of a communication device disclosed in the embodiment of the present application. The communication device shown in fig. 13 may include various functional modules corresponding to the method in the foregoing method embodiments in a one-to-one manner, and in a specific implementation, the communication device includes a processor 1301, a memory 1302, and a communication interface 1303. Wherein processor 1301, memory 1302 and communication interface 1303 are coupled.

The processor 1301 may be a Central Processing Unit (CPU), a Network Processor (NP), or a combination of a CPU and an NP. The processor may also be an application-specific integrated circuit (ASIC), a Programmable Logic Device (PLD), or a combination thereof. The PLD may be a Complex Programmable Logic Device (CPLD), a field-programmable gate array (FPGA), a General Array Logic (GAL), or any combination thereof. Processor 1301 may refer to a single processor or may include multiple processors. The memory 1302 may include a volatile memory (RAM), such as a random-access memory (RAM); the memory may also include a non-volatile memory (ROM), such as a read-only memory (ROM), a flash memory (flash memory), a hard disk (HDD) or a solid-state drive (SSD); the memory 1302 may also include a combination of the above types of memory. The memory 1302 may refer to one memory or may include a plurality of memories.

The communication interface 1303 is used for realizing communication with other devices.

The processor 1301 invokes the program code stored in the memory 1302 to perform the steps performed by the access network device or the first node in the above method embodiments.

The memory 1302 stores therein computer-readable instructions, which include a plurality of software modules, which may include a receiving module, a sending module, and a processing module as an optional implementation. The receiving module may be configured to execute a receiving action of the access network device in the foregoing method embodiment, the sending module may be configured to execute a sending action of the access network device in the foregoing method embodiment, and the processing module may be configured to execute processing actions such as determining the access network device in the foregoing method embodiment. Alternatively, the receiving module may be configured to perform the receiving action of the first node in the foregoing method embodiment, the sending module may be configured to perform the sending action of the first node in the foregoing method embodiment, and the processing module may be configured to perform processing actions such as determining and data processing of the first node in the foregoing method embodiment.

Based on the same inventive concept, the principle of solving the problem of the communication device provided in the embodiment of the present application is similar to the principle of solving the problem of the access network device or the first node in the embodiment of the method of the present application, so the implementation of each device may refer to the implementation of the method, and is not described herein again for brevity.

In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for resource allocation, the method comprising:

the method comprises the steps that an access network device receives a first message from a first node, wherein the first message is used for indicating that a terminal device is associated to the first node;

the access network equipment receives a second message from a second node, wherein the second message is used for indicating that the terminal equipment is associated to the second node;

the access network equipment allocates a first time-frequency resource of a first side link to the terminal equipment;

The access network equipment allocates a second time-frequency resource of a second side link to the terminal equipment, and the first time-frequency resource and the second time-frequency resource are not overlapped;

the access network equipment sends first time-frequency resource information to the first node and second time-frequency resource information to the second node, wherein the first time-frequency resource information indicates the first time-frequency resource, and the second time-frequency resource information indicates the second time-frequency resource.

2. The method of claim 1, wherein the access network device and the first node communicate over an air interface of a cellular network, and wherein the access network device and the second node communicate over the air interface of the cellular network; the first node and the terminal device communicate through the first sidelink, and the second node and the terminal device communicate through the second sidelink.

3. The method according to claim 1 or 2, characterized in that the terminal device is a half-duplex mode terminal device.

4. The method of claim 3, wherein the first message further comprises an identification of the terminal device on the first sidelink or wherein the second message further comprises an identification of the terminal device on the second sidelink, and wherein the method further comprises:

The access network equipment acquires the capability information of the terminal equipment according to the identifier of the terminal equipment on the first side link or the identifier of the terminal equipment on the second side link;

and the access network equipment determines that the terminal equipment is the terminal equipment in the half-duplex mode according to the capability information of the terminal equipment.

5. A method for resource allocation, the method comprising:

a first node receives a first request from a terminal device, wherein the first request is used for requesting to establish association with the first node;

the first node sends a first message to an access network device, wherein the first message is used for indicating that the terminal device is associated to the first node;

the first node receives first time-frequency resource information from the access network device, wherein the first time-frequency resource information indicates first time-frequency resources, the first time-frequency resources are time-frequency resources of a first side link allocated to the terminal device by the access network device, the first time-frequency resources are not overlapped with second time-frequency resources, and the second time-frequency resources are time-frequency resources of a second side link allocated to the terminal device by the access network device.

6. The method of claim 5, wherein the access network device and the first node communicate over an air interface of a cellular network; the first node and the terminal device communicate through the first sidelink.

7. The method according to claim 5 or 6, wherein the terminal device is a half-duplex mode terminal device.

8. The method of claim 7, wherein the first message further comprises an identification of the terminal device on the first sidelink.

9. A method for interference coordination, the method comprising:

a first node determines a second node, wherein the first node is responsible for allocating a first time-frequency resource of a first side link to a terminal device under the first node, the second node is responsible for allocating a second time-frequency resource of a second side link to a terminal device under the second node, the first time-frequency resource and the second time-frequency resource have overlapping resources, the first node is managed by a first access network device, and the second node is managed by a second access network device;

the first node sends first information to a second node, wherein the first information is used for indicating a third time frequency resource for interference coordination, and the third time frequency resource is part or all of the overlapped resources.

10. The method of claim 9, wherein the first node determines a second node, comprising:

The first node receiving second information from the first access network device, the second information indicating the second node;

and the first node determines the second node according to the second information.

11. The method of claim 10, wherein the second information further indicates the overlapping resources between the first node and the second node.

12. The method according to any of claims 9 to 11, wherein the third time-frequency resource is a time-frequency resource interfered by a signal of a terminal device under the first node, and the method further comprises:

the first node receives third information from a terminal device under the first node, wherein the third information is used for indicating one or more of the following: a carrier wave interfered by a signal of the terminal equipment under the first node, a resource pool interfered by the signal of the terminal equipment under the first node, a sub-channel interfered by the signal of the terminal equipment under the first node, a resource block interfered by the signal of the first equipment, and a frame, a subframe or a time slot interfered by the signal of the first equipment;

and the first node determines the third time-frequency resource according to the third information.

13. A communication device, characterized in that the communication device comprises:

a communication module, configured to receive a first message from a first node, where the first message is used to indicate that a terminal device is associated with the first node;

the communication module is further configured to receive a second message from a second node, where the second message is used to indicate that the terminal device is associated with the second node;

the processing module is used for allocating a first time-frequency resource of a first side link for the terminal equipment;

the processing module is further configured to allocate a second time-frequency resource of a second sidelink to the terminal device, where the first time-frequency resource and the second time-frequency resource are not overlapped;

the communication module is further configured to send first time-frequency resource information to the first node, and send second time-frequency resource information to the second node, where the first time-frequency resource information indicates the first time-frequency resource, and the second time-frequency resource information indicates the second time-frequency resource.

14. The communication device according to claim 13, wherein the communication device and the first node communicate over a cellular air interface, and the communication device and the second node communicate over a cellular air interface; the first node and the terminal device communicate through the first sidelink, and the second node and the terminal device communicate through the second sidelink.

15. A communication device according to claim 13 or 14, wherein the terminal device is a half-duplex mode terminal device.

16. The communications device of claim 15, wherein the first message further includes an identification of the terminal device on the first sidelink or the second message further includes an identification of the terminal device on the second sidelink,

the processing module is further configured to obtain capability information of the terminal device according to the identifier of the terminal device on the first sidelink or the identifier on the second sidelink;

the processing module is further configured to determine that the terminal device is a terminal device in a half-duplex mode according to the capability information of the terminal device.

17. A communication device, characterized in that the communication device comprises:

a receiving module, configured to receive a first request from a terminal device, where the first request is used to request to establish association with the communication device;

a sending module, configured to send a first message to an access network device, where the first message is used to indicate that the terminal device is associated with the communication device;

the receiving module is further configured to receive first time-frequency resource information from the access network device, where the first time-frequency resource information indicates a first time-frequency resource, the first time-frequency resource is a time-frequency resource of the first side link allocated by the access network device to the terminal device, the first time-frequency resource is not overlapped with a second time-frequency resource, and the second time-frequency resource is a time-frequency resource of the second side link allocated by the access network device to the terminal device.

18. The communications device of claim 17, wherein the access network device and the communications device communicate over a cellular air interface; the communication device and the terminal device communicate through the first sidelink.

19. A communication device according to claim 17 or 18, wherein the terminal device is a half-duplex mode terminal device.

20. The communications device of claim 19, wherein the first message further includes an identification of the terminal device on the first sidelink.

21. A communication device, characterized in that the communication device comprises:

a processing module, configured to determine a second node, where the communication device is responsible for allocating a first time-frequency resource of a first side link to a terminal device under the communication device, the second node is responsible for allocating a second time-frequency resource of a second side link to the terminal device under the second node, the first time-frequency resource and the second time-frequency resource have overlapping resources, the communication device is managed by a first access network device, and the second node is managed by a second access network device;

a communication module, configured to send first information to a second node, where the first information is used to indicate a third time-frequency resource for interference coordination, and the third time-frequency resource is part or all of the overlapping resources.

22. The communications device of claim 21, wherein the processing module determines the manner of the second node specifically is:

receiving second information from the first access network device, the second information indicating the second node;

and determining the second node according to the second information.

23. The communications device of claim 22, wherein said second information further indicates said overlapping resources between said communications device and said second node.

24. The communication device according to any of claims 22-23, wherein the third time-frequency resource is a time-frequency resource interfered by a signal of a terminal device under the communication device,

the communication module is further configured to receive third information from a terminal device under the communication device, where the third information is used to indicate one or more of the following: a carrier wave interfered by a signal of the terminal equipment under the communication equipment, a resource pool interfered by the signal of the terminal equipment under the communication equipment, a sub-channel interfered by the signal of the terminal equipment under the communication equipment, a resource block interfered by the signal of the first equipment, and a frame, a sub-frame or a time slot interfered by the signal of the first equipment;

The processing module is further configured to determine the third time-frequency resource according to the third information.