CN111867089B

CN111867089B - Resource allocation method and equipment

Info

Publication number: CN111867089B
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: 2023-12-15
Anticipated expiration: 2039-04-30
Also published as: WO2020221199A1; CN111867089A

Abstract

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

Description

Resource allocation method and equipment

Technical Field

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

Background

Conventional cellular network communications mainly include communications between access network devices (e.g., base stations) and terminal devices, and the introduction of device-to-device (D2D) communication schemes increases the direct communications between terminal devices. Subsequently, the internet of vehicles (vehicle to everything, V2X) communication modes are introduced. In the V2X communication scheme, nodes for managing a plurality of terminal devices are introduced in different local areas, and the nodes allocate side link time-frequency resources for the managed terminal devices. The node is managed by an access network device. The node may schedule transmission resources between the terminal device and the node in the local area and between the terminal device and the terminal device in the local area. The local resources that the node is responsible for can be allocated by the access network device or perceived by itself.

For example, as shown in fig. 1, the first node and the second node are respectively connected to the access network device by radio resource control (radio resource control, RRC), and are respectively responsible for managing a local area. The first node is responsible for managing the terminal devices 1 and 2 within the area 1. The terminal device is associated to the first node by a side link association procedure. Wherein the first node and the terminal device 1, the first node and the terminal device 2, and the side link time-frequency resources of the communication between the terminal device 1 and the terminal device 2 are all scheduled by the first node. Wherein the dashed line represents the control plane and the solid line the user plane. Similarly, the second node is responsible for managing 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, both the first node and the second node are 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 for the terminal device is a problem to be solved 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 for terminal equipment.

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

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

Optionally, the access network device and the first node communicate through a cellular network air interface, and the access network device and the second node communicate through a cellular network air interface; the first node and the terminal device communicate via a first side link and the second node and the terminal device communicate via a second side link.

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

Optionally, the first message further includes an identifier of the terminal device on the first side link or the second message further includes an identifier of the terminal device on the second side link, 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 identification of the terminal equipment on the first side link or the identification of the terminal equipment on the second side link; the access network equipment determines that the terminal equipment is in a half duplex mode according to the capability information of the terminal equipment. Based on the optional mode, the access network device can acquire the capability information of the terminal device, and further determine that the terminal device is in a half-duplex mode according to the capability information of the terminal device.

In a second aspect, an embodiment of the present application provides a resource allocation method, where the method includes: the first node receives a first request from the terminal device, the first request being for requesting to establish an association with the first node; the first node sends a first message to the access network device, wherein the first message is used for indicating that the terminal device is associated with 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 by the access network equipment for the terminal 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 by the access network equipment for the terminal equipment.

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

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

Optionally, the first message further comprises an identification of the terminal device on the first side link.

The advantages of the second aspect or the optional manner of the second aspect may be referred to the advantages of the first aspect or the optional manner of the first aspect, based on the same inventive concept, and the repetition is not repeated.

In a third aspect, an embodiment of the present application provides an interference coordination method, where the method includes: the first node determines a second node, wherein the first node is responsible for distributing first time-frequency resources of a first side link to terminal equipment under the first node, the second node is responsible for distributing second time-frequency resources of a second side link to the terminal equipment under the second node, the first time-frequency resources and the second time-frequency resources have overlapped resources, the first node is managed by first access network equipment, and the second node is managed by second access network equipment; 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 is able to determine a second node with overlapping side link time-frequency resources and send first information to the second node indicating a third time-frequency resource for interference coordination. So that the second node can perform interference coordination according to the first information. Thus, based on the method described in the third aspect, interference coordination is enabled.

Optionally, the specific implementation manner of the first node to determine the second node is: 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 based on the second information. Based on this alternative, the second node may be informed by the first access network device to the first node.

Optionally, the second information further indicates said overlapping resources between the first node and the second node. By indicating the overlapped resource, the first node can screen the second node according to the overlapped resource, and only send the first information to part of the second nodes, thereby being beneficial to saving transmission resources. For example, if the third time-frequency resource is a time-frequency resource that the first device is interfered by a signal, the first device is the first node or a terminal device managed by the first node. The first node may determine, from the plurality of second nodes, a target second node having a time-frequency resource overlapping with the third time-frequency resource based on the overlapping resources. 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 of the terminal device under the first node that is interfered by the signal, and the first node may further execute the following steps: the first node receives third information from a terminal device under the first node, the third information being used to indicate one or more of: the method comprises the steps of carrying out carrier wave, resource pool, sub-channel and resource block, and frame, sub-frame or time slot, wherein the carrier wave is interfered by signals, the resource pool is interfered by signals, the sub-channel is interfered by signals, the resource block is interfered by signals, and the frame, sub-frame or time slot is interfered by signals; the first node determines a third time-frequency resource according to the third information. Based on this alternative, the first node can determine the time-frequency resources of the terminal device under the first node that are subject to signal interference.

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-described first aspect and optional embodiments of the first aspect. When the communication device is a first node, the communication device may comprise a receiving module, a transmitting module and a processing module to perform the corresponding method steps of any of the above-described second aspect, third aspect, optional embodiments of the second aspect and optional embodiments of the third aspect. The foregoing modules may be implemented by hardware, or may be implemented by executing corresponding software by hardware. For example, the receiving module is configured to perform the receiving action in the method embodiment, the sending module is configured to perform the sending action in the method embodiment, and the processing module may perform the processing actions such as the determining in the method embodiment.

Alternatively, the communication device may be an access network device or a chip in the first node, and when the communication device is a chip in the access network device, the communication device is configured to implement the method according to any one of the foregoing first aspect and the optional implementation manners of the first aspect. When the communication device is a chip in a first node, the communication device is adapted to implement the method of any of the above second aspect, third aspect, optional embodiments of the second aspect and optional embodiments of the third aspect. Based on the same inventive concept, the principle and beneficial effects of the communication device in solving the problem may be referred to the above first aspect to third aspect, and the method and beneficial effects of any one of the optional embodiments of the first aspect to the optional embodiments of the third aspect, and the repetition is omitted.

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 first aspect and alternative 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 above second aspect, third aspect, optional embodiments of the second aspect, and optional embodiments of the third aspect. Embodiments and advantages of the communication device for solving problems may be referred to the above first to third aspects, or any one of the optional embodiments of the first to third aspects, and the method and advantages of the optional embodiments of the first to third aspects, and repeated parts will not be repeated.

In a sixth aspect, there is provided a computer program product which, when run on a computer, causes the computer to perform the method of any one of the above-described first to third aspects, optional embodiments of the first aspect, optional embodiments of the third aspect.

In a seventh aspect, there is provided a computer readable storage medium having instructions stored therein which, when run on a computer, cause the computer to perform the method of any one of the above first to third aspects, optional embodiments of the first aspect, and optional embodiments of the third aspect.

In an eighth aspect, a communication system is provided, the communication system comprising an access network device and a first node, the access network device being operable to perform the method of any of the above-mentioned first aspect and optional implementation manners of the first aspect, the first node being operable to perform the method of any of the above-mentioned second aspect and optional implementation manners of the second aspect.

Drawings

FIG. 1 is a schematic diagram of a prior art communication system;

FIG. 2 is a schematic diagram of a communication system according to an embodiment of the present application;

fig. 3 is a schematic flow chart of a resource allocation method according to an embodiment of the present application;

Fig. 4 is a flow chart of another resource allocation method according to 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 according to an embodiment of the present application;

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

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

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

fig. 11 is a schematic flow chart of an interference coordination method according to an embodiment of the present application;

fig. 12 is a flow chart of 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 are applicable 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 a first node and a second node, and terminal device 3 is associated with a second node. Fig. 2 illustrates an example of three terminal devices included in a communication system. Of course, the communication system may further include more than three or less than three terminal devices, which is not limited by the embodiment of the present application.

Optionally, the access network device and the first node communicate through a cellular network air interface, and the access network device and the second node communicate through a 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 access network device is used for managing the first node and the second node.

The first node may allocate time-frequency resources of the first side link for terminal devices associated only with the first node. The second node may allocate time-frequency resources of the second side link for terminal devices associated only with the second node. Associating a terminal device with a node means that the terminal device establishes a connection with the node. After the terminal equipment associates with the node, the terminal equipment belongs to the terminal equipment under the node and is managed by the node.

For example, the access network device may allocate time-frequency resources 1 of the first side link to the first node in advance, where the first node allocates time-frequency resources of the first side link to the terminal device 1 from the time-frequency resources 1. The access network device may allocate time-frequency resources 2 of the second side link to the second node in advance, where the second node allocates time-frequency resources of the second side link to the terminal device 3 from the time-frequency resources 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 after the first node performs channel sensing by itself, and the time-frequency resource 2 may be determined after the second node performs channel sensing by itself. For example, the manner in which the first node perceptually determines the time-frequency resource 1 of the channel may be: when the received signal strength of the first node sends out a channel is smaller than the threshold 1, or the proportion that the received signal strength is smaller than the threshold 1 within 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 time-frequency resource 1. The manner in which the second node performs the perceptual determination of the time-frequency resource 2 on the channel is the same and is not described here.

In practical applications, when the same terminal device is associated to 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 the half duplex mode, the terminal device 2 cannot transmit and receive data at the same time, and the terminal device 2 cannot transmit data to different devices on the same time-frequency resource, and the terminal device 2 cannot receive data transmitted from different devices on the same time-frequency resource. The terminal device in half duplex mode means that the terminal device cannot transmit data and receive data simultaneously in the communication process.

Wherein the inability of the terminal device 2 to transmit data to different devices at the same time-frequency resource includes: the terminal device 2 cannot transmit data to the first node and the second node at the same time-frequency resource. The terminal device 2 cannot transmit data to the first node and the other terminal devices at the same time-frequency resource. The terminal device 2 cannot transmit data to the second node and other terminal devices on the same time-frequency resource. The terminal device 2 cannot transmit data to any two other terminal devices on the same time-frequency resource.

Wherein, 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 data transmitted by the first node and the second node at the same time-frequency resource. And the terminal device 2 cannot receive the data transmitted by the first node and the other terminal devices at the same time-frequency resource. And the terminal device 2 cannot receive the data transmitted by the second node and the other terminal devices at the same time-frequency resource. And the terminal device 2 cannot receive data transmitted 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 both the first node and the second node are independently allocating side link time-frequency resources for the terminal device 2. Therefore, the first side link time-frequency resource allocated by the first node to the terminal device 2 may overlap with the second side link time-frequency resource allocated by the second node to the terminal device 2. For example, the time-frequency resources of the first side link allocated by the first node for the terminal device 2 for receiving data overlap with the time-frequency resources of the second side link allocated by the second node for the terminal device 2 for transmitting data. In this case, the terminal device 2 is required to transmit and receive data simultaneously. Alternatively, the time-frequency resources of the first side link allocated by the first node for the terminal device 2 for receiving data overlap with the time-frequency resources of the second side link allocated by the second node for the terminal device 2 for receiving data. In this case, the terminal device 2 is required to receive data transmitted by the device under the first side link and the device under the second side link at the same time-frequency resource. Alternatively, the time-frequency resources of the first side link allocated by the first node for the terminal device 2 for transmitting data overlap with the time-frequency resources of the second side link allocated by the second node for the terminal device 2 for transmitting data. In this case, the terminal device 2 is required to transmit data to the device under the first side link and the device under the second side link at the same time-frequency resource. Therefore, in both cases, the terminal device 2 will be caused to fail to 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 transmits data normally.

If the terminal device 2 is a terminal device in full duplex mode, the terminal device 2 cannot transmit data to different devices on the same time-frequency resource, and the terminal device 2 cannot receive data transmitted by different devices on the same time-frequency resource. The terminal device in full duplex mode means that the terminal device can send data and receive data simultaneously in the communication process. Therefore, if the time-frequency resource of the first side link for transmitting data, which is allocated to the terminal device 2 by the first node, overlaps with the time-frequency resource of the second side link for transmitting data, which is allocated to the terminal device 2 by the second node, it will cause that the terminal device 2 cannot normally transmit data. Or if the time-frequency resource of the first side link for receiving data, which is allocated to the terminal device 2 by the first node, overlaps with the time-frequency resource of the second side link for receiving data, which is allocated to the terminal device 2 by the second node, it will also cause that the terminal device 2 cannot normally receive data. Therefore, it is necessary to allocate non-overlapping transmission time-frequency resources or non-overlapping reception time-frequency resources to the terminal device 2 in order to ensure that the terminal device 2 normally transmits data.

In order to reasonably allocate time-frequency resources of side links to terminal equipment associated with a plurality of nodes, the embodiment of the application allocates the time-frequency resources of the side links to the terminal equipment associated with the plurality of nodes through the access network equipment. 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 to the terminal device 2 do not overlap. The access network device 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 on 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 transmit data on the second time-frequency resource. Alternatively, 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 receiving the first time-frequency resource information, the first node does not allow the terminal device 2 to receive data and transmit data on the first time-frequency resource, and designates the terminal device 2 to receive data or transmit data on the second time-frequency resource. After receiving the second time-frequency resource information, the second node does not allow the terminal device 2 to receive data and transmit data at the second time-frequency resource, and designates the terminal device 2 to receive data or transmit data at the first time-frequency resource.

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

The access network device may provide communication coverage for a specific geographic area, and may communicate with terminal devices located in the coverage area, and the access network device may support different standards of communication protocols, or may support different communication modes. For example, the access network device may be an evolved base station (evolutional node B, eNB or eNodeB) in an LTE system, or a radio network controller in a cloud radio access network (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 receiving point (transmission reception point, TRP); but also relay stations, access points or access network devices in future evolved public land mobile networks (public land mobile network, PLMNs), etc.

The terminal device may refer to an access terminal, a User Equipment (UE), a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile terminal, a user terminal, a wireless communication device, a user agent, or a user equipment. An access terminal may be a cellular telephone, a cordless telephone, a session initiation protocol (session initiation protocol, SIP) phone, a wireless local loop (wireless local loop, WLL) station, a personal digital assistant (personal digital assistant, PDA), a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, a terminal device in the internet of things, a virtual reality device, a terminal device in a future 5G network or a terminal device in a future evolved public land mobile network (public land mobile network, PLMN), etc.

The first node and the second node may also be terminal devices, or be a repeater, or an access point, or other communication devices that may be disposed between an access network device and a terminal device.

The resource allocation method and the equipment provided by the application are further described below.

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

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 transmits the first request to the first node over the first side link.

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

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

Wherein the first message may be generated by the first node and sent 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 carried in the first request to be sent to the first node.

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 side link. For example, the identification of the terminal device at the first side link may be at least one of a Layer 2 (L2) identification and an internet protocol (internet protocol, IP) address, etc. Wherein the L2 identity may be a near field communication (proximity service enable, proSe) UE ID, a connection ID, or a media access control (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 identity of the terminal device may consist of a cell radio network temporary identity (cell radio network temporary identifier, C-RNTI) and a cell identity. Alternatively, the identification of the terminal device may be a station identification (station ID) for uniquely identifying the terminal device. For example, when the terminal device requests to associate with the first node, the station ID is included in the first request, for example, the station ID is included in the application layer or V2X layer or MAC header; the terminal device, when requesting to associate with the second node, also includes the station ID in the second request, e.g. in the application layer or V2X layer or MAC header. When the first node sends a first message to the access network equipment, the first message contains the station ID; the second node also includes the station ID in the second message when sending the second message to the access network device.

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 to the first request to the terminal device before sending 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 to 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 side link.

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

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

Wherein 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 carried in the second request to be sent to the second node.

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 on the second side link. For example, the identity of the terminal device on the second side link may be at least one of a Layer 2 (Layer 2, L2) identity and an internet protocol (internet protocol, IP) address, etc. Wherein the L2 identity may be a near field communication (proximity service enable, proSe) UE ID, a connection ID, or a media access control (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 identity of the terminal device may consist of a cell radio network temporary identity (cell radio network temporary identifier, C-RNTI) and a cell identity. 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 to the second request to the terminal device before sending 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 to the second request to the terminal device.

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

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

In the embodiment of the application, after the access network equipment receives the first message from the first node and the second message from the second node, the access network equipment 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 equipment. Wherein the first time-frequency resource and the second time-frequency resource do not overlap.

Step 305 may be performed first, followed by step 306, or step 306 may be performed first, followed by step 305.

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

For example, the access network device sends the identifier of the first side link and the first time-frequency resource information of the terminal device to the first node through a radio resource control (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. The access network device sends 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 side link 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.

Step 307 may be performed before step 308 is performed, or step 308 may be performed before step 307 is performed.

In the embodiment of the application, after the access network equipment allocates the first time-frequency resource and the second time-frequency resource for the terminal equipment, the access network equipment sends the first time-frequency resource information to the first node and sends the 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.

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

As an alternative embodiment, if the terminal device is a terminal device in 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 for the terminal device to receive data, and the second time-frequency resource is a time-frequency resource for the terminal device to transmit data. After receiving the first time-frequency resource information, the first node designates the terminal equipment to receive data in the first time-frequency resource. After receiving the second time-frequency resource information, the second node designates 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 transmit data, and the second time-frequency resource is a time-frequency resource for the terminal device to receive data. After receiving the first time-frequency resource information, the first node designates the terminal equipment to send data on the first time-frequency resource. After receiving the second time-frequency resource information, the second node designates the terminal equipment to receive data in the second time-frequency resource.

Or, the first time-frequency resource is a time-frequency resource for the terminal device to transmit data, and the second time-frequency resource is a time-frequency resource for the terminal device to transmit data. After receiving the first time-frequency resource information, the first node designates the terminal equipment to send data on the first time-frequency resource. After receiving the second time-frequency resource information, the second node designates 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 receiving the first time-frequency resource information, the first node designates the terminal equipment to receive data in the first time-frequency resource. After receiving the second time-frequency resource information, the second node designates the terminal equipment 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 the two sending time-frequency resources of the terminal equipment can be staggered, or the two receiving time-frequency resources of the terminal equipment can be staggered, so that the terminal equipment can normally transmit data.

As an alternative implementation manner, if the terminal device is a terminal device in half duplex mode, the first time-frequency resource is a time-frequency resource that does not allow the terminal device to receive data and does not 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 and does not allow the terminal device to transmit data, and the first time-frequency resource is an absolute complement of the second time-frequency resource.

After receiving the first time-frequency resource information, the first node designates the terminal equipment to receive or send data in the second time-frequency resource. After receiving the second time-frequency resource information, the second node designates the terminal equipment to receive or transmit data in the first time-frequency resource.

It can be seen that, in this alternative manner, the receiving time-frequency resource and the transmitting time-frequency resource of the terminal device can be staggered, or the receiving time-frequency resource of the terminal device can be staggered.

Optionally, if the terminal device is a terminal device in 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 receiving the first time-frequency resource information, the first node designates the terminal equipment to receive data in the first time-frequency resource. After receiving the second time-frequency resource information, the second node designates the terminal equipment to receive data in the second time-frequency resource. Or the first time-frequency resource is used for the terminal equipment to send data, and the second time-frequency resource is used for the terminal equipment to send data. After receiving the first time-frequency resource information, the first node designates the terminal equipment to send data on the first time-frequency resource. After receiving the second time-frequency resource information, the second node designates the terminal equipment to send data in the second time-frequency resource. It can be seen that, in this alternative manner, the transmission time-frequency resources of the terminal device can be staggered, or the reception time-frequency resources of the terminal device can be staggered.

Optionally, if the terminal device is a terminal device in full duplex mode, the first time-frequency resource is a time-frequency resource that does not allow the terminal device to receive data and does not 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 and does not allow the terminal device to transmit data, and the first time-frequency resource is an absolute complement of the second time-frequency resource.

After receiving the first time-frequency resource information, the first node designates the terminal equipment to receive or send data in the second time-frequency resource. After receiving the second time-frequency resource information, the second node designates the terminal equipment to receive or transmit data in the first time-frequency resource. It can be seen that, in this alternative manner, the transmission time-frequency resources of the terminal device can be staggered, or the reception time-frequency resources of the terminal device 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, so as to ensure that the terminal device can perform data transmission normally. Therefore, by implementing the method described in fig. 3, time-frequency resources can be reasonably allocated to the terminal device.

As an alternative embodiment, the first message further comprises an identification of the terminal device on the first side link or the second message further comprises an identification of the terminal device on the second side link, as shown in fig. 4, the access network device may further perform the following steps:

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

406. The access network equipment determines that the terminal equipment is in a 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 the identifier of the terminal device on the first side link and the identifier of the cellular network of the terminal device, and a mapping relationship between the identifier of the terminal device on the second side link and the identifier of the cellular network of the terminal device. For example, when the terminal device accesses the access network device, the identifier of the terminal device on the first side link and the identifier of the terminal device on the second side link may be reported to the access network device. Then the access network equipment distributes the cellular network identification for the terminal equipment, 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 can acquire the identifier of the terminal device on the first side link from the first message, and acquire the cellular network identifier corresponding to the terminal device according to the pre-stored mapping relationship between the identifier of the terminal device on the first side link and the cellular network identifier. Or after the access network device receives the second message, the access network device may acquire the identifier of the terminal device on the second side link from the second message, and acquire the cellular network identifier corresponding to the terminal device according to the pre-stored mapping relationship between the identifier of the terminal device on the second side link and the cellular network identifier. After the access network equipment acquires the cellular network identification of the terminal equipment, the access network equipment acquires the pre-stored capability information of the terminal equipment according to the cellular network identification. If the capability information of the terminal equipment is not stored in the access network equipment, the access network equipment can request the terminal equipment to acquire the capability information according to the cellular network identification of the terminal equipment. The access network device can determine whether the terminal device is a terminal device in a half duplex mode according to the capability information of the terminal device.

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

The embodiment of the application also provides an interference coordination method and equipment, which can perform 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 will be 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 is 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 a first access network device being identical to a second access network device. In fig. 5 and fig. 6, the communication system includes 4 terminal devices, and of course, the communication system may further include more than 4 terminal devices or less than 4 terminal devices, which is not limited by the embodiment of the present application.

The first access network equipment and the first node are communicated through a cellular network air interface, and the second access network equipment and the second node are communicated 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 configured to allocate time-frequency resources of a first side link to a terminal device under the first node. The second node is configured to allocate time-frequency resources of a second side link to a terminal device 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 resources of the first side link to terminal device 1 and terminal device 2. The second node is responsible for allocating the second time-frequency resources of the second side link to terminal device 3 and terminal device 4. Wherein the first time-frequency resource and the second time-frequency resource have an overlap. Alternatively, the first time-frequency resource and the second time-frequency resource may be allocated by the access network device. Alternatively, 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, when the terminal device in the area 1 receives the signal, it may be interfered by the signal transmitted by the second node or the terminal device in the area 2. Alternatively, when a first node in region 1 receives a signal, it may be interfered by a signal transmitted by a second node or terminal device in region 2.

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

As another example, as shown in fig. 8, the first node transmits a signal to the terminal device 2 through a first side link on a certain time-frequency resource, and the second node also transmits a signal to the terminal device 3 through a second side link on the same time-frequency resource. The reception of the terminal device 2 by the signal transmitted by the second node may also cause interference.

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

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

Fig. 7 to 10 take the case that the first access network device is different from the second access network device, and the first access network device is the same as the second access network device, which is not described here again.

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

The interference coordination method and the device provided by the application are further described below.

Referring to fig. 11, fig. 11 is a flow chart of an interference coordination method according to an embodiment of the application. As shown in fig. 11, the interference coordination method includes the following steps 1101 to 1103, in which:

1101. the first node determines a second node.

The first node is responsible for distributing first time-frequency resources of a first side link to terminal equipment under the first node, the second node is responsible for distributing second time-frequency resources of a second side link to the terminal equipment under the second node, the first time-frequency resources and the second time-frequency resources 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. Alternatively, 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 side link time-frequency resources with the first node.

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

Mode one: each node may broadcast a discovery message on the side link that may indicate that the corresponding node is responsible for allocating side link time-frequency resources for its associated terminal device. For example, the discovery message contains a scheduling group header indication indicating that the node is responsible for allocating side link time-frequency resources for its associated terminal device. And the discovery message may indicate side link time-frequency resources that the corresponding node has. After the first node monitors the discovery message, it may be determined whether the node sending the discovery message is the second node according to the discovery message. For example, after the first node monitors the discovery message broadcast by the node 2, the first node may determine, according to the discovery message, the side link time-frequency resources that the node 2 has, and determine that the node 2 is responsible for allocating the side link time-frequency resources 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 a second node.

Mode two: each node may broadcast a discovery message on its own time-frequency resources that may indicate that the corresponding node is responsible for allocating side-link time-frequency resources for its associated terminal device. If the first node monitors the discovery message on the first time-frequency resource, the first node determines that the node sending the discovery message is a second node.

Mode three: the second node is indicated to the first node 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 for 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 be further divided into a transmission resource pool and a reception resource pool. The resources in the receive resource pool are used to receive data and the resources in the transmit resource pool are used to transmit data. Wherein the resource pool information may include the following information: 1) The sidelink-offset Indicator, i.e., the side link offset Indicator. Offset of the resource pool relative to the cell system frame number (system frame number, SFN) when the UE is within cell coverage; offset of the resource pool relative to the direct frame number (direct frame number, DFN) when the UE is out of cell coverage; 2) A side chain subframe contained in the resource pool; 3) The number of physical resource blocks (physical resource block, PRBs) contained per 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 sub-channel may include one or more PRBs. The PRB in the embodiment of the present application is the name of RB in the physical layer. 4) The number of subchannels; 5) A starting RB index of a physical side link control channel; 6) Whether the physical side link control channel (pysical sidelink control channel, PSCCH) and the physical side link shared channel (physical sidelink shared channel, PSSCH) are adjacent in the frequency domain. Wherein, 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 also includes one or more node identities and a resource pool overlap indication. As shown in table 1 below, each node identity corresponds to a resource overlap indication in the second information. The value of the resource overlap indication may be 0 or 1, or the value true or false of the resource overlap indication. For example, the first node is node 1. Node 2 and node 3 are included in the node list in table 1. If the value of the resource overlapping indication corresponding to the node 2 is 0 or false, the node 1 and the node 2 have no overlapping side link time-frequency resource. If the value of the resource overlap indication 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 overlapping instruction corresponding to the node 3 is 0 or false, it indicates that the side link time-frequency resources of the node 1 and the node 3 do not overlap. If the value of the resource overlap indication 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 should be noted 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

The node identifier in table 1 may be an L2 identifier of the node on a side link. For example, the near field communication (proximity service enable, proSe) UE ID may also be a C-RNTI of the node in the cellular network, a cell identity, or a MAC address or IP address of the node, etc.

As an alternative embodiment, the second information may indicate not only the second node, but also 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 a carrier, a resource pool, a subchannel, a resource block, a frame, a subframe, and a time slot where the first time-frequency resource and the second time-frequency resource overlap. Herein, carriers, resource pools, subchannels, resource blocks, frames, subframes, and timeslots may refer to carriers, resource pools, subchannels, resource blocks, frames, subframes, and timeslots 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 the first information is sent 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 that the first device is interfered by a signal, the first device is the first node or a terminal device managed by the first node. The first node may determine, from the plurality of second nodes, a target second node having a time-frequency resource overlapping with the third time-frequency resource based on the overlapping resources. 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 a carrier that the first node overlaps with the second node. The access network device may send the second information in the format of table 2 below to indicate the carrier on which the first node overlaps the second node. As shown in table 2 below, one carrier identity corresponds to one node list. The node list has one or more node identities under it. Each node identity corresponds to a resource overlap indication. The value of the resource overlap indication may be 0 or 1, or the value true or false of the resource overlap indication. For example, the first node is node 1, the carrier identification in table 2 below is the identification of carrier 1, and the node list includes the identification 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 do not overlap in the carrier 1. If the value of the resource overlapping indication of the node 2 is 1 or true, it indicates that the node 1 and the node 2 overlap in 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 a carrier and a resource pool that the first node overlaps with the second node. The access network device may send second information in the format of table 3 below to indicate the carrier and resource pool that the first node overlaps with the second node. As shown in table 3 below, one carrier identity corresponds to one resource pool list with one or more resource pool information under the one resource pool list. Each resource pool information corresponds to a list of nodes. The node list has one or more node identities under it. Each node identity corresponds to a resource overlap indication. The value of the resource overlap indication may be 0 or 1, or the value true or false of the resource overlap indication. For example, the first node is node 1, the carrier identifier in table 2 below is the identifier of carrier 1, the resource pool information is the information of resource pool 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, the side link time-frequency resources of the node 1 and the node 2 are indicated not to overlap on the resource pool 1 of the carrier 1. If the value of the resource overlapping indication 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 overlap on the resource pool 1 of the carrier 1. Then node 2 is the second node.

TABLE 3 Table 3

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

The second information indicates that the sub-channels, the resource blocks, the frames, the sub-frames and the time slots where the first time-frequency resources and the second time-frequency resources overlap are the same, and are not described in detail herein. Of course, the second information may not indicate the side link time-frequency resources 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, so that the first node can only determine the first time-frequency resource and the second node according to the second information in the format of table 1, and cannot determine the specific resource overlapped by the first node and the second node.

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

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

1103. 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 is able to determine a second node with overlapping side link time-frequency resources and send first information to the second node indicating a third time-frequency resource for interference coordination. So that the second node can perform interference coordination according to the first information. It can be seen that by implementing the method described in fig. 11, interference coordination is enabled.

As an optional implementation manner, the third time-frequency resource is a time-frequency resource of the first node or the terminal device under the first node subject to signal interference. The specific implementation manner of the second node for interference coordination according to the first information can include the following three ways:

mode one: 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 smaller than the preset distance from the second node on the frequency domain resource of the third time-frequency resource. The second node does not schedule terminal equipment with the distance from the second node being greater than a preset distance on the frequency domain resource of the third time-frequency resource. Due to the closer distance between the second node and the scheduled terminal device, the second node or the scheduled terminal device may reduce the transmit power, thereby enabling to reduce the interference to the first node or the terminal device under the first node.

The device having a distance to the second node smaller than the preset distance is a cell center device. The device having a distance to the second node greater than the preset distance is a cell edge device. In one mode, 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 first node or the terminal device under the first node which is interfered by the signal, so that the cell center device on the frequency domain resource of the third time-frequency resource is not easy to cause interference to the first node or the terminal device under the first node.

Mode two: the second node determines a third time-frequency resource according to the first information. And the second node determines an interference source device which causes interference to the first node or the terminal device under the first node according to the third time-frequency resource. The second node determines a fourth time-frequency resource subsequent to the interference source device and sends fourth time-frequency resource information for indicating the fourth time-frequency resource to the first node. After the first node receives the fourth time-frequency resource information, the first node interfered by the signal or the subsequent time-frequency resource information of the terminal equipment interfered by the signal under the first node can be adjusted to be a fifth time-frequency resource, and the fifth time-frequency resource is different from the fourth time-frequency resource.

In the side link 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, after the terminal equipment performs channel sensing by itself, selecting a proper resource pool from a sending resource pool and/or a receiving resource pool broadcasted by the first node to perform communication, or selecting a proper resource pool from a pre-configured sending resource pool and/or a receiving resource pool to perform communication. When the terminal equipment managed by the first node adopts a scheduling mode, the first node dynamically allocates disposable resources or Semi-persistent scheduling SPS (Semi-Persistent Scheduling) resources for the terminal equipment. Therefore, in the second mode, if the terminal device under signal interference in the first node is a terminal device adopting the scheduling mode, after receiving the fourth time-frequency resource information, the first node may allocate a fifth time-frequency resource to the terminal device under signal interference in the first node by using a dynamic allocation mode or a semi-static scheduling mode. If the terminal device under signal interference in the first node is the terminal device adopting the UE selection mode, after receiving the fourth time-frequency resource information, the first node may notify the terminal device under signal interference in the first node to subsequently adopt the fifth time-frequency resource, or notify the terminal device under signal interference in the first node to subsequently avoid the fourth time-frequency resource.

In the second mode, the second node may determine a device that transmits data using the third time-frequency resource 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 resource of the second device without adjusting the subsequent time-frequency resource of the second device, and the first node adjusts the subsequent time-frequency resource of the first node that is interfered by the signal or the terminal device that is interfered by the signal under the first node, so that the first node that is interfered by the signal or the subsequent time-frequency resource of the terminal device that is interfered by the signal under the first node avoids the subsequent time-frequency resource of the second device.

Mode three: the second node determines a third time-frequency resource according to the first information. The second node determines the interference source device according to the third time-frequency resource. The second node adjusts the subsequent time-frequency resource of the interference source device to be a fourth time-frequency resource, and 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 further schedule the first node or the terminal device under the first node that is interfered by the signal on the frequency domain resource of the third time-frequency resource.

In the third aspect, the second node may determine a device that transmits data using the third time-frequency resource 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 third mode, the first node does not need to adjust the first node interfered by the signal or the terminal device 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 subsequent time-frequency resource of the first node interfered by the signal or 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 of the first node or the terminal device under the first node subject to signal interference. The first information also indicates a fifth time-frequency resource subsequent to the first device. The specific implementation mode of the second node for interference coordination according to the first information is as follows: 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 an interference source device according to the third time-frequency resource, wherein the interference source device is an interference source device which causes interference to the first node or terminal devices under the first node. The second node adjusts the subsequent time-frequency resource of the interference source device to be a fourth time-frequency resource, and the fourth time-frequency resource is different from the fifth time-frequency resource.

In this optional embodiment, if the interference source device is a terminal device adopting a scheduling mode, the second node may allocate a fourth time-frequency resource for the interference source device by using 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 can inform the interference source device to subsequently adopt the fourth time-frequency resource or inform the interference source device to subsequently avoid the fifth time-frequency resource.

In this alternative embodiment, the first node does not need to adjust the subsequent time-frequency resources of the first node that is interfered by the signal or of the terminal device that is 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 subsequent time-frequency resource of the first node interfered by the signal or 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 of which the terminal device under the first node is interfered by a signal. As shown in fig. 12, before the first node sends the first information to the second node, the following steps may be further performed:

1202. The terminal device under the first node transmits third information to the first node.

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

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

Specifically, after the first node receives the third information from the first device, a third time-frequency resource is determined 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 to the terminal device under the first node. 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 the first node can also determine the third time-frequency resource interfered by the terminal device without indicating the resource interfered by the signal. For example, the first node allocates only sub-channel 1 or PRB1 under carrier 1 to the terminal device 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 subject to signal interference. After receiving the third information, the first node can determine that the sub-channel 1 or PRB1 of the terminal device is interfered by the carrier 1.

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

If the first node allocates a plurality of sub-channels or a plurality of PRBs under a certain carrier to the terminal device under the first node, the third information transmitted by the terminal device only needs to indicate the interfered sub-channels or PRBs. The first node can determine a third time-frequency resource interfered by the terminal device according to the third information. For example, if the first node allocates sub-channel 1, sub-channel 2 or PRB1, PRB2 of 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 sub-channel 1 of the terminal device under carrier 1 is interfered.

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

If the first node allocates a single sub-channel or a single PRB of the resource pool 1 under carrier 1 to the terminal device under the first node, the single sub-channel or the single PRB under the resource pool under the other carriers. 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 third time-frequency resource interfered by the terminal device according to the third information. For example, if a first node allocates a sub-channel 1 or PRB1 of resource pool 1 of carrier 1 and a sub-channel 2 or PRB2 of resource pool 2 of carrier 2 to a 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. After receiving the third information, the first node can determine that the terminal device is interfered on the sub-channel 1 or PRB1 of the resource pool 1 of the carrier 1.

If the first node allocates a number of sub-channels or PRBs under a number of resource pools under a number of carriers to the terminal device under the first node. The third information transmitted by the terminal device needs to indicate the interfered carrier, resource pool and sub-channel or the third information transmitted by the terminal device needs to indicate the carrier, resource pool and PRB. For example, if a first node allocates sub-channel 1 and sub-channel 2 of resource pool 1 under carrier 1, sub-channel 3 and sub-channel 4 of resource pool 2 under carrier 2 to a 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 on the sub-channel 1 of the resource pool 1 of the carrier 1.

As an alternative implementation manner, if the third time-frequency resource is a time-frequency resource that the first node or the terminal device under the first node is interfered by a signal, the first information may include an overload indication (overload indication, OI) bit map, and the first information indicates the third time-frequency resource through the OI bit map. In the OI bit bitmap, each bit corresponds to one PRB or one subchannel. When the bit value is 1, it means that the corresponding PRB or subchannel is subject to strong interference, whereas it is not.

As an alternative embodiment, the third time-frequency resource may also be a time-frequency resource that 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 with low interference sensitivity of the terminal device under the first node, i.e. the terminal device under the first node of the third time-frequency resource can only bear smaller interference and cannot bear larger interference. A high interference indication (high interference indiacation, HII) bit map may be included in the first information, which indicates the third time-frequency resource through the HII bit map. HII is also one bit per PRB or per subchannel. When the bit value is 1, the terminal equipment under the first node is high in interference sensitivity in the corresponding PRB or sub-channel, and otherwise, the terminal equipment under the first node is low in interference sensitivity.

In this alternative embodiment, a specific implementation manner of performing interference coordination by the second node according to the first information may be: and the second node schedules terminal equipment with the distance smaller than the preset distance from the second node on the third time-frequency resource. The second node schedules terminal equipment with the distance from the second node being larger than the preset distance on the time-frequency resources except the third time-frequency resource.

The device having a distance to the second node smaller than the preset distance is a cell center device. The device having a distance to the second node greater than the preset distance is a cell edge device. In this alternative embodiment, the second node subsequently schedules only the cell center device on the frequency domain resources 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 according to an embodiment of the present application. The communication device as shown in fig. 13 may include various functional modules corresponding to the methods one-to-one in the above method embodiments, and in a specific implementation, the communication device includes a processor 1301, a memory 1302, and a communication interface 1303. Wherein the processor 1301, the memory 1302 and the communication interface 1303 are connected.

Processor 1301 may be a central processor (English: central processing unit, abbreviated: CPU), a network processor (English: network processor, abbreviated: NP) or a combination of CPU and NP. The processor may also be an application-specific integrated circuit (ASIC), a Programmable Logic Device (PLD) or a combination thereof (English: programmable logic device). The PLD may be a complex programmable logic device (English: complex programmable logic device, abbreviated: CPLD), a field programmable gate array (English: field-programmable gate array, abbreviated: FPGA), a general-purpose array logic (English: generic array logic, abbreviated: GAL), or any combination thereof. Processor 1301 may refer to one processor or may include multiple processors. Memory 1302 may include volatile memory (English) such as random-access memory (RAM); the memory may also include a nonvolatile memory (english: non-volatile memory), such as a read-only memory (ROM), a flash memory (english: flash memory), a hard disk (HDD) or a Solid State Disk (SSD); memory 1302 may also include a combination of the above types of memory. The memory 1302 may be one memory or may include a plurality of memories.

Wherein the communication interface 1303 is used to implement communication with other devices.

Wherein processor 1301 invokes program code stored in memory 1302, which may perform the steps performed by the access network device or the first node in the above-described method embodiment.

Therein, the memory 1302 has stored therein computer readable instructions comprising a plurality of software modules, which may include a receiving module, a transmitting module, and a processing module, as an alternative implementation. The receiving module may be configured to perform a receiving action of the access network device in the foregoing method embodiment, the sending module may be configured to perform a sending action of the access network device in the foregoing method embodiment, and the processing module may be configured to perform processing actions such as determining the access network device in the foregoing method embodiment. Alternatively, the receiving module may be configured to perform a receiving action of the first node in the foregoing method embodiment, the transmitting module may be configured to perform a transmitting 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 that of the access network device or the first node in the embodiment of the method of the present application, so that the implementation of each device may refer to the implementation of the method, and for brevity, the description is not repeated here.

In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application.

Claims

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

the access network equipment receives a first message from a first node, wherein the first message is used for indicating that terminal equipment is associated with the first node, and the terminal equipment is in a half-duplex mode;

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

the access network equipment allocates first time-frequency resources 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, wherein the first time-frequency resource and the second time-frequency resource are not overlapped;

the access network device transmits first time-frequency resource information to the first node and transmits 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 a cellular network air interface, and wherein the access network device and the second node communicate over a cellular network air interface; the first node and the terminal device communicate through the first side link, and the second node and the terminal device communicate through the second side link.

3. The method according to claim 1 or 2, wherein the first message further comprises an identification of the terminal device at the first side link or the second message further comprises an identification of the terminal device at the second side link, the method further comprising:

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

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

4. A method of resource allocation, the method comprising:

the method comprises the steps that a first node receives a first request from terminal equipment, wherein the first request is used for requesting to establish association with the first node, and the terminal equipment is in a half-duplex mode;

the first node sends a first message to access network equipment, wherein the first message is used for indicating that the terminal equipment is associated with 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 by the access network equipment to the terminal 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 by the access network equipment to the terminal equipment.

5. The method of claim 4, wherein the access network device and the first node communicate over a cellular network air interface; the first node and the terminal device communicate via the first side link.

6. The method according to claim 4 or 5, characterized in that the first message further comprises an identification of the terminal device at the first side link.

7. A method of interference coordination, the method comprising:

the first node receives second information from the first access network device, the second information indicating a second node, the second information further indicating overlapping resources between the first node and the second node;

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

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 the overlapped resources.

8. The method of claim 7, wherein the third time-frequency resource is a time-frequency resource in which a terminal device under the first node is signal-interfered, the method further comprising:

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: the method comprises the steps of carrying out carrier wave of signal interference on terminal equipment under a first node, a resource pool of signal interference on the terminal equipment under the first node, a sub-channel of signal interference on the terminal equipment under the first node, a resource block of signal interference on the terminal equipment under the first node, and a frame, a sub-frame or a time slot of signal interference on the terminal equipment under the first node;

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

9. A communication device, the communication device comprising:

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, and the terminal device is a terminal device in a half duplex mode;

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;

A processing module, configured to allocate a first time-frequency resource of a first side link to the terminal device;

the processing module is further configured to allocate a second time-frequency resource of a second side link to the terminal device, where the first time-frequency resource and the second time-frequency resource do not overlap;

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.

10. The communication device of claim 9, wherein the communication device and the first node communicate over a cellular network air interface, and wherein the communication device and the second node communicate over a cellular network air interface; the first node and the terminal device communicate through the first side link, and the second node and the terminal device communicate through the second side link.

11. The communication device according to claim 9 or 10, wherein the first message further comprises an identification of the terminal device at the first side link or the second message further comprises an identification of the terminal device at the second side link,

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 side link or the identifier of the terminal device on the second side link;

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.

12. A communication device, the communication device comprising:

a receiving module, configured to receive a first request from a terminal device, where the first request is used to request to establish an association with the communication device, and the terminal device is a terminal device in a half duplex mode;

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, where the first time-frequency resource is a time-frequency resource of a 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 a second side link allocated by the access network device to the terminal device.

13. The communication device of claim 12, wherein the access network device and the communication device communicate over a cellular network air interface; the communication device and the terminal device communicate via the first side link.

14. The communication device according to claim 12 or 13, wherein the first message further comprises an identification of the terminal device at the first side link.

15. A communication device, the communication device comprising:

a processing module configured to receive second information from a first access network device, the second information indicating a second node, the second information further indicating overlapping resources between the communication device and the second node;

the processing module is further configured to determine the second node according to the second information, 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;

And the communication module is used for sending 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 the overlapped resources.

16. The communication device of claim 15, wherein the third time-frequency resource is a time-frequency resource in which a terminal device under the communication device is signal-interfered,

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: the method comprises the steps of carrying out carrier wave of signal interference on terminal equipment under the communication equipment, a resource pool of signal interference on the terminal equipment under the communication equipment, a sub-channel of signal interference on the terminal equipment under the communication equipment, a resource block of signal interference on the terminal equipment under the communication equipment, and a frame, a sub-frame or a time slot of signal interference on the terminal equipment under the communication equipment;

and the processing module is further used for determining the third time-frequency resource according to the third information.