WO2020221199A1

WO2020221199A1 - Resource allocation method and device

Info

Publication number: WO2020221199A1
Application number: PCT/CN2020/087221
Authority: WO
Inventors: 罗海燕; 戴明增; 曾清海
Original assignee: 华为技术有限公司
Priority date: 2019-04-30
Filing date: 2020-04-27
Publication date: 2020-11-05
Also published as: CN111867089B; CN111867089A

Abstract

Embodiments of the present application disclose a resource allocation method and a communication device, the method comprising: an access network device receiving a first message from a first node, wherein the first message indicates that a terminal device is associated with the first node; the access network device receiving a second message from a second node, wherein the second message indicates that the terminal device is associated with the second node; the access network device allocating a first time frequency resource of a first sidelink to the terminal device; the access network device allocating a second time frequency resource of a second sidelink to the terminal device, wherein the first time frequency resource and the second time frequency resource do not overlap; and the access network device sending first time frequency resource information to the first node, and sending 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.

Description

Resource allocation method and equipment

Technical field

This application relates to the field of communications technology, and in particular to a method and equipment for resource allocation.

Background technique

Traditional cellular network communication mainly includes communication between access network devices (such as base stations) and terminal devices, and the introduction of device-to-device (D2D) communication methods increases the direct communication between terminal devices . In the follow-up, the Internet of Vehicles is considered, and the vehicle to everything (V2X) communication method is introduced. In the V2X communication mode, a node that manages multiple terminal devices is introduced in different local areas, and the node allocates side link time-frequency resources for the managed terminal devices. The access network equipment manages the node. The node can schedule the transmission resources between the terminal equipment in the local area and the node, and schedule the transmission resources between the terminal equipment and the terminal equipment in the local area. The local resources that the node is responsible for can be allocated by the access network equipment, or can be perceived by itself.

For example, as shown in Fig. 1, the first node and the second node respectively have a radio resource control (Radio Resource Control, RRC) connection with the access network device, and they are respectively responsible for managing a local area. The first node is responsible for managing terminal device 1 and terminal device 2 in area 1. The terminal device is associated with the first node through the side link association process. Among them, 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. Among them, the dotted line represents the control plane, and the solid line represents the user plane. In the same way, the second node is responsible for managing the terminal device 3 and the terminal device 4 in the area 2.

In some cases, a terminal device can also be associated with multiple nodes at the same time, that is, a terminal device can also be managed by multiple nodes at the same time. For example, as shown in Figure 2, both the first node and the second node are responsible for managing the terminal device 2. When multiple nodes manage the same terminal device, how to reasonably allocate side link time-frequency resources to the terminal device is a problem to be solved urgently.

Summary of the invention

The embodiments of the present application provide a resource allocation method and device, which can reasonably allocate side link time-frequency resources to terminal devices.

In the first aspect, an embodiment of the present application provides a resource allocation method, the method includes: an access network device receives a first message from a first node, the first message is used to indicate that the terminal device is associated with the first node; access The network device receives a second message from the second node, the second message is used to indicate that the terminal device is associated with the second node; the access network device allocates the first time-frequency resource of the first side link to the terminal device; the access network device Allocate the second time-frequency resource of the second side link to the terminal device, and the first time-frequency resource does not overlap the second time-frequency resource; the access network device sends the first time-frequency resource information to the first node, and sends it to the first node. The two nodes send second time-frequency resource information, where the first time-frequency resource information indicates a first time-frequency resource, and the second time-frequency resource information indicates a second time-frequency resource.

Based on the method described in the first aspect, the access network equipment can uniformly allocate non-overlapping side link time-frequency resources to the terminal equipment associated with multiple nodes, thereby ensuring that the terminal equipment can normally transmit data. Therefore, based on the method described in the first aspect, the access network device can reasonably allocate side link time-frequency resources to the terminal device.

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

Optionally, the terminal device is a terminal device in a half-duplex mode. Based on this optional manner, it is possible to reasonably allocate side link time-frequency resources to terminal devices in the half-duplex mode.

Optionally, the first message further includes the identification of the terminal device on the first side link or the second message also includes the identification of the terminal device on the second side link, and the access network device may also perform the following steps: access network device The capability information of the terminal device is obtained according to the identification of the terminal device on the first side link or the identification of the second side link; the access network device determines that the terminal device is a terminal device in the half-duplex mode according to the capability information of the terminal device. Based on this optional manner, the access network device can obtain the capability information of the terminal device, and then determine that the terminal device is a terminal device 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. The method includes: a first node receives a first request from a terminal device, the first request is used to request to establish an association with the first node; The network access device sends a first message, which is used to indicate that the terminal device is associated with the first node; the first node receives first time-frequency resource information from the access network device, and the first time-frequency resource information indicates the first time The first time-frequency resource is the time-frequency resource of the first side link allocated by the access network device to the terminal device. The first time-frequency resource and the second time-frequency resource do not overlap, and the second time-frequency resource is the access The time-frequency resource of the second side link allocated by the network access device to the terminal device.

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

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

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

Based on the same inventive concept, the beneficial effects of the second aspect or the optional manners of the second aspect can be referred to the beneficial effects of the above-mentioned first aspect or the optional manners of the first aspect, and the repetition will not be repeated.

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

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

Optionally, the specific implementation manner for the first node to determine the second node is: the first node receives second information from the first access network device, the second information indicates the second node; the first node determines the second node according to the second information Two nodes. Based on this optional manner, the first access network device may notify the first node of the second node.

Optionally, the second information further indicates the overlapping resources between the first node and the second node. By indicating the overlapping resources, the first node can screen the second nodes based on the overlapping resources, and only send the first information to part of the second nodes, which is beneficial to saving transmission resources. For example, if the third time-frequency resource is a time-frequency resource interfered by a signal by the first device, the first device is the first node or a terminal device managed by the first node. The first node may determine a target second node whose time-frequency resource and the third time-frequency resource overlap from a plurality of second nodes according to the overlapping resource. That is, 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, it only needs to send the first information to the target second node.

Optionally, the third time-frequency resource is a time-frequency resource in which the terminal equipment under the first node is interfered by the signal. The first node may also perform the following steps: the first node receives the third information from the terminal equipment under the first node, The third information is used to indicate one or more of the following: the carrier where the terminal equipment under the first node is interfered by the signal, the resource pool where the terminal equipment under the first node is interfered by the signal, and the terminal equipment under the first node receives the signal. The interfering subchannel and the resource block of the first device interfered by the signal, and the frame, subframe or time slot of the first device interfered by the signal; the first node determines the third time-frequency resource according to the third information. Based on this optional manner, the first node can determine the time-frequency resources of the terminal equipment under the first node that are interfered by the signal.

In a fourth aspect, a communication device is provided, and the communication device may be an access network device or a first node. When the communication device is an access network device, the communication device may include a communication module and a processing module to execute the corresponding method steps of any one of the foregoing first aspect and optional implementation manners of the first aspect. When the communication device is the first node, the communication device may include a receiving module, a sending module, and a processing module to perform the second aspect, the third aspect, the optional implementation manners of the second aspect, and the optional third aspect. The corresponding method steps of any one of the embodiments. The foregoing modules can be implemented by hardware, or by hardware executing corresponding software. For example, the receiving module is used to perform the receiving action in the foregoing method embodiment, the sending module is used to perform the sending action in the foregoing method embodiment, and the processing module may perform processing actions such as determination in the foregoing method embodiment.

Alternatively, the communication device may also be an access network device or a chip in the first node. When the communication device is a chip in the access network device, the communication device is used to implement the first aspect and the first aspect described above. Any one of the selected implementation methods. When the communication device is a chip in the first node, the communication device is used to implement any one of the foregoing second aspect, third aspect, optional implementation manner of the second aspect, and optional implementation manner of the third aspect Item method. Based on the same inventive concept, the principle and beneficial effects of the communication device to solve the problem can be referred to in any one of the first aspect to the third aspect, the optional implementation manner of the first aspect to the optional implementation manner of the third aspect. The method and beneficial effects will not be repeated here.

In a fifth aspect, a communication device is provided. The communication device includes a processor, a memory, and 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 to realize 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 calls the program stored in the memory to implement the method of any one of the foregoing first aspect and the optional implementation manner of the first aspect. When the communication device is the first node, the processor calls the program stored in the memory to implement the second aspect, the third aspect, the optional implementation of the second aspect, and the optional implementation of the third aspect. Any one of the methods. For the implementation manner and beneficial effects of the communication device to solve the problem, please refer to the method and beneficial effects of any one of the first aspect to the third aspect, the optional implementation manner of the first aspect to the optional implementation manner of the third aspect. , The repetition will not be repeated.

In a sixth aspect, a computer program product is provided, which when it runs on a computer, causes the computer to execute the above-mentioned first aspect to third aspect, optional implementation of the first aspect to optional implementation of the third aspect Any one of the methods.

In a seventh aspect, a computer-readable storage medium is provided. The computer-readable storage medium stores instructions, which when run on a computer, cause the computer to execute the first to third aspects and the first aspect. Optional implementation to the method of any one of the optional implementations of the third aspect.

In an eighth aspect, a communication system is provided, the communication system includes an access network device and a first node, and the access network device can execute any one of the foregoing first aspect and optional implementation manners of the first aspect The first node can execute the method of any one of the foregoing second aspect and the optional implementation manner of the second aspect.

Description of the drawings

Fig. 1 is a schematic diagram of an existing communication system;

Figure 2 is a schematic diagram of a communication system provided by an embodiment of the present application;

FIG. 3 is a schematic flowchart of a resource allocation method provided by an embodiment of the present application;

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

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

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

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

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

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

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

FIG. 11 is a schematic flowchart of an interference coordination method provided by an embodiment of the present application;

FIG. 12 is a schematic flowchart of another interference coordination method provided by an embodiment of the present application;

FIG. 13 is a schematic structural diagram of a communication device provided by an embodiment of the present application.

Detailed ways

The specific embodiments of the present application will be further described in detail below in conjunction with the accompanying drawings.

In order to better understand the embodiments of the present application, the following describes the applicable system architecture of the embodiments of the present application.

Fig. 2 is a schematic diagram of a communication system provided by an embodiment of the present application. As shown in Figure 2, the communication system includes an access network device, a first node, a second node, and terminal devices. The terminal device 1 is associated with the first node, the terminal device 2 is associated with the first node and the second node, and the terminal device 3 is associated with the second node. Figure 2 takes as an example the communication system including three terminal devices. Of course, the communication system may also include more than three or less than three terminal devices, which is not limited in the embodiment of the present application.

Optionally, the access network device and the first node communicate through the cellular network air interface, and the access network device and the second node communicate through the cellular network air interface; the first node and the terminal device communicate through a first side link (sidelink). The two nodes and the terminal device communicate through the second side link.

Among them, the access network equipment is used to manage the first node and the second node.

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

For example, the access network device may allocate the time-frequency resource 1 of the first side link to the first node in advance, and the first node allocates the time-frequency resource of the first side link to the terminal device 1 from the time-frequency resource 1. The access network device may allocate the time-frequency resource 2 of the second side link to the second node in advance, and the second node allocates the time-frequency resource of the second side link to the terminal device 3 from the time-frequency resource 2. Or time-frequency resource 1 and time-frequency resource 2 may not be allocated by the access network equipment. Time-frequency resource 1 may be determined after the first node performs channel sensing by itself, and time-frequency resource 2 may be determined by the second node for channel sensing itself. After confirming. For example, the method for the first node to perceive the channel to determine the time-frequency resource 1 may be: when the first node finds that the received signal strength of the channel is less than the threshold 1, or within a preset period of time, the ratio of the received signal strength less than the threshold 1 is higher than If the threshold is 2, the first node determines that the channel is available, and the first node determines that the channel is a time-frequency resource 1. The second node perceives the channel to determine the time-frequency resource 2 in the same way, which is not repeated here.

In practical applications, when the same terminal device is associated with multiple nodes, the multiple nodes often cannot reasonably allocate side link time-frequency resources to the terminal device. For example, if the terminal device 2 is a half-duplex terminal device, the terminal device 2 cannot send and receive data at the same time, and the terminal device 2 cannot send data to different devices in the same time-frequency resource, and the terminal device 2 cannot be in the same time. Frequency resources receive data sent by different devices. Among them, the terminal device in the half-duplex mode means that during the communication process, the terminal device cannot send data and receive data at the same time.

Where the terminal device 2 cannot send data to different devices on the same time-frequency resource includes: the terminal device 2 cannot send data to the first node and the second node on the same time-frequency resource. The terminal device 2 cannot send data to the first node and other terminal devices in the same time-frequency resource. The terminal device 2 cannot send data to the second node and other terminal devices in the same time-frequency resource. The terminal device 2 cannot send data to any two other terminal devices in the same time-frequency resource.

Wherein, that the terminal device 2 cannot receive data sent by different devices on the same time-frequency resource means that the terminal device 2 cannot receive data sent by the first node and the second node on the same time-frequency resource. In addition, the terminal device 2 cannot receive the data sent by the first node and other terminal devices in the same time-frequency resource. In addition, the terminal device 2 cannot receive data sent by the second node and other terminal devices in the same time-frequency resource. And the terminal device 2 cannot receive data sent by the other two terminal devices in the same time-frequency resource.

As shown in Figure 2, the terminal device 2 is associated with the first node and the second node. Because both the first node and the second node allocate side link time-frequency resources to the terminal device 2 independently. 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 resource of the first side link used to receive data allocated by the first node to the terminal device 2 overlaps with the time-frequency resource of the second side link allocated to the terminal device 2 for sending data by the second node . In this case, the terminal device 2 needs to send and receive data at the same time. Or, the time-frequency resource of the first side link used to receive data allocated by the first node to the terminal device 2 overlaps with the time-frequency resource of the second side link allocated to the terminal device 2 for receiving data by the second node . In this case, the terminal device 2 needs to receive data sent by the device under the first side link and the device under the second side link on the same time-frequency resource. Or, the time-frequency resource of the first side link used to send data allocated by the first node to the terminal device 2 overlaps with the time-frequency resource of the second side link allocated to the terminal device 2 for sending data by the second node . In this case, the terminal device 2 needs to send data to the device under the first side link and the device under the second side link on the same time-frequency resource. Therefore, in these several cases, the terminal device 2 will not be able to transmit data normally. Therefore, it is necessary to allocate two non-overlapping time-frequency resources for the terminal device 2 to ensure that the terminal device 2 normally transmits data.

If the terminal device 2 is a terminal device in full duplex mode, the terminal device 2 cannot send data to different devices on the same time-frequency resource, and the terminal device 2 cannot receive data sent by different devices on the same time-frequency resource. Among them, the terminal device in the full-duplex mode means that in the communication process, the terminal device can send data and receive data at the same time. Therefore, if the first node allocates the time-frequency resources of the first side link for sending data to the terminal device 2 and the second node allocates the time-frequency resources of the second side link for sending data to the terminal device 2 Overlapping will cause the terminal device 2 to fail to send data normally. Or, if the first node allocates the time-frequency resource of the first side link for receiving data to the terminal device 2 and the second node allocates the time-frequency resource of the second side link for receiving data to the terminal device 2 Overlapping will also cause the terminal device 2 to not receive data normally. Therefore, it is necessary to allocate non-overlapping transmission time-frequency resources or non-overlapping receiving time-frequency resources to the terminal device 2 to ensure that the terminal device 2 normally transmits data.

In order to reasonably allocate time-frequency resources of side links to terminal devices associated with multiple nodes, the embodiment of the present application uniformly allocates time-frequency resources of side links to terminal devices associated with multiple nodes through an access network device. 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, the first time-frequency resource and the second time-frequency resource are not overlapping. 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 send data in the first time-frequency resource. After receiving the second time-frequency resource information, the second node instructs the terminal device 2 to receive data or send data in the second time-frequency resource. Or, the first time-frequency resource and the second time-frequency resource are time-frequency resources that do not allow the terminal device 2 to receive and send 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 send data in the first time-frequency resource, and designates the terminal device 2 to receive data or send data in 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 send data in the second time-frequency resource, and designates the terminal device 2 to receive data or send data in the first time-frequency resource.

By implementing the method described in the embodiment of this application, the access network device will not allocate overlapping time-frequency resources to the terminal device 2, so that for the terminal device in the half-duplex mode, the terminal device will not need to be at the same time-frequency The situation occurs when resources send and receive data, or send data to different devices on the same time-frequency resource, or receive data sent by different devices on the same time-frequency resource. For terminal devices in full-duplex mode, the terminal device will not need to send data to different devices on the same time-frequency resource, or receive data sent by different devices on the same time-frequency resource.

Among them, the access network device can provide communication coverage for a specific geographic area, and can communicate with terminal devices located in the coverage area, and the access network device can support communication protocols of different standards, or can support different communication modes . For example, the access network equipment 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 The access network equipment in the 5G network, such as gNB; or it can be a small station, a micro station, or a transmission reception point (TRP); it can also be a relay station, an access point, or a public land mobile network that will evolve in the future (public land mobile network). Land mobile network (PLMN) access network equipment, etc.

Among them, terminal equipment can refer to access terminals, user equipment (UE), user units, user stations, mobile stations, mobile stations, remote stations, remote terminals, mobile terminals, user terminals, terminals, wireless communication equipment, users Agent or user device. Access terminals can be cellular phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), and wireless communications Functional handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in the Internet of Things, virtual reality devices, terminal devices in future 5G networks, or future evolution of public land mobile networks (public land mobile network, PLMN) terminal equipment, etc.

Wherein, the above-mentioned first node and second node may also be terminal devices, or repeaters, or access points, or other communication devices that can be set between the access network device and the terminal device.

The following further introduces the resource allocation method and equipment provided by this application.

Please refer to FIG. 3, which is a schematic flowchart of a resource allocation method provided by an embodiment of the present application. As shown in Figure 3, the data transmission method includes the following steps 301 to 308, where:

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

Wherein, the first request is used to request to establish an association with the first node. For example, the terminal device may be the terminal device 2 in FIG. 2. Specifically, the terminal device sends the first request to the first node through the first side link.

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

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

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, carried in the first request and sent to the first node.

Optionally, the first message also includes the identification of the terminal device. The identifier of the terminal device may be the identifier of the terminal device on the first side link. For example, the identification of the terminal device on the first side link may be at least one of a layer 2 (Layer 2) identification and an Internet protocol (IP) address. Wherein, the L2 identifier may be a near field communication (proximity service enable, ProSe) UE ID, connection (connection) ID or media access control (media access control, MAC) address. Alternatively, the identification of the terminal device may be the cellular network identification of the terminal device. For example, the cellular network identifier of the terminal device may be composed of a cell radio network temporary identifier (C-RNTI) and a cell identifier. Alternatively, the identification of the terminal device may be a station ID (station ID) used to uniquely identify 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; when the terminal device requests to associate with the second node, the station ID is included in the first request. The second request also includes the station ID, for example, the station ID is included in the application layer or V2X layer or MAC header. Subsequently, when the first node sends the first message to the access network device, it includes the station ID in the first message; when the second node sends the second message to the access network device, it also includes the station in the second message. ID.

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

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

Wherein, the second request is used to request to establish an association 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 present application, after receiving the second request from the terminal device, the second node establishes an association relationship with the terminal device, and sends the second message to the access network device through the cellular network air interface. The second message is used to indicate that the terminal device is associated with the second node. Alternatively, 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.

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, carried in the second request and sent to the second node.

Optionally, the second message also includes the identification of the terminal device. The identifier of the terminal device may be the identifier of the terminal device on the second side link. For example, the identification of the terminal device on the second side link may be at least one of a layer 2 (Layer 2) identification and an Internet protocol (IP) address. Wherein, the L2 identifier may be a near field communication (proximity service enable, ProSe) UE ID, connection (connection) ID or media access control (media access control, MAC) address. Alternatively, the identification of the terminal device may be the cellular network identification of the terminal device. For example, the cellular network identifier of the terminal device may be composed of a cell radio network temporary identifier (C-RNTI) and a cell identifier. Alternatively, the identification of the terminal device may be a station ID (station ID) used to uniquely identify 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 first send a response message for the second request to the terminal device, and then send the second message to the access network device. Alternatively, the second node may first send the second message to the access network device, and then send the response message for the second request to the terminal device.

305. The access network device allocates the first time-frequency resource of the first side link to the terminal device.

306. The access network device allocates the second time-frequency resource of the second side link to the terminal device.

In the embodiment of the present application, after the access network device receives the first message from the first node, and after receiving the second message from the second node, the access network device allocates the first time-frequency resource of the first side link to the terminal device and The second time-frequency resource of the link on the first side. Wherein, the first time-frequency resource and the second time-frequency resource do not overlap.

Among them, step 305 may be performed first, and then step 306, or step 306 may be performed first, and then step 305 may be performed.

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

For example, the access network device sends the identification of the terminal device on the first side link and the first time-frequency resource information to the first node through a radio resource control (radio resource control, RRC) reconfiguration message, so that the first node can learn about 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 the second time-frequency resource information to the second node.

For example, the access network device sends the identification 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 can learn the second time-frequency resource information indicated by the second node. The time-frequency resource is configured for the terminal device.

Among them, step 307 may be performed first, and then step 308, or step 308 may be performed first, and then step 307 may be performed.

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

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

As an optional implementation manner, if the terminal device is a terminal device in a half-duplex mode, the first time-frequency resource receives data or sends data, and the second time-frequency resource is used for the terminal device to receive data or send 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 send data. After receiving the first time-frequency resource information, the first node designates the terminal device to receive data in the first time-frequency resource. After receiving the second time-frequency resource information, the second node specifies the terminal device 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 send 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 specifies the terminal device to send data in the first time-frequency resource. After receiving the second time-frequency resource information, the second node designates the terminal device 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 send data, and the second time-frequency resource is a time-frequency resource for the terminal device to send data. After receiving the first time-frequency resource information, the first node specifies the terminal device to send data in the first time-frequency resource. After receiving the second time-frequency resource information, the second node specifies the terminal device to send data in the second time-frequency resource.

Alternatively, 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 device to receive data in the first time-frequency resource. After receiving the second time-frequency resource information, the second node designates the terminal device to receive data in the second time-frequency resource.

It can be seen that through this optional method, the receiving time-frequency resource and the sending time-frequency resource of the terminal device can be staggered, or the two sending time-frequency resources of the terminal device can be staggered, or the two receiving time-frequency resources of the terminal device can be staggered , So as to ensure that the terminal equipment can transmit data normally.

As an optional implementation manner, if the terminal device is a terminal device in a half-duplex mode, the first time-frequency resource is a time-frequency resource that does not allow the terminal device to receive data or the terminal device to send data. The frequency resource is a time-frequency resource that is not allowed to receive data by a terminal device, nor is it allowed to send data. 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 device 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 device to receive or send data in the first time-frequency resource.

It can be seen that through this optional manner, the receiving time-frequency resource and the sending time-frequency resource of the terminal device can be staggered, or the sending 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 a full-duplex mode, the first time-frequency resource is used for the terminal device to receive data, and the second time-frequency resource is used for the terminal device to receive data. After receiving the first time-frequency resource information, the first node designates the terminal device to receive data in the first time-frequency resource. After receiving the second time-frequency resource information, the second node designates the terminal device to receive data in the second time-frequency resource. Or, the first time-frequency resource is used for the terminal device to send data, and the second time-frequency resource is used for the terminal device to send data. After receiving the first time-frequency resource information, the first node specifies the terminal device to send data in the first time-frequency resource. After receiving the second time-frequency resource information, the second node specifies the terminal device to send data in the second time-frequency resource. It can be seen that through this optional manner, the sending time-frequency resources of the terminal device can be staggered, or the receiving 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 or the terminal device to send data, and the second time-frequency resource is a time-frequency resource that is not allowed When the terminal device receives data, the terminal device is not allowed to send the time-frequency resource of the data. The first time-frequency resource is the absolute complement of the second time-frequency resource.

After receiving the first time-frequency resource information, the first node designates the terminal device 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 device to receive or send data in the first time-frequency resource. It can be seen that through this optional manner, the sending time-frequency resources of the terminal device can be staggered, or the receiving time-frequency resources of the terminal device can be staggered.

It can be seen that by implementing the method described in FIG. 3, the access network device can uniformly allocate non-overlapping time-frequency resources to the terminal device, thereby ensuring 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 optional implementation manner, the first message further includes the identification of the terminal device on the first side link or the second message further includes the identification of the terminal device on the second side link, as shown in FIG. 4, the access network The device can also perform the following steps:

405. The access network device obtains the capability information of the terminal device according to the identification of the terminal device on the first side link or the identification of the terminal device on the second side link.

406. The access network device determines that the terminal device is a terminal device in a half-duplex mode according to the capability information of the terminal device.

In this embodiment, the access network device can store in advance the mapping relationship between the identification of the terminal device on the first side link and the cellular network identification of the terminal device, and prestore the identification of the terminal device on the second side link and the terminal device The mapping relationship of the cellular network identity. For example, when the terminal device accesses the access network device, it may report the identification of the terminal device on the first side link and the identification of the second side link to the access network device. Then the access network device assigns the cellular network identifier to the terminal device, and stores the mapping relationship between the terminal device’s identity on the first side link and the terminal device’s cellular network identity, and stores the terminal device’s identity on the second side link and the terminal The mapping relationship of the cellular network identifier of the device. After the access network device receives the first message, the access network device can obtain the identification of the terminal device on the first side link from the first message, and according to the pre-stored identification of the terminal device on the first side link and The mapping relationship of the cellular network identifiers is used to obtain the cellular network identifier corresponding to the terminal device. Alternatively, after the access network device receives the second message, the access network device may obtain the identification of the terminal device on the second side link from the second message, and use the pre-stored terminal device on the second side link identification The mapping relationship between the identifier and the cellular network identifier is used to obtain the cellular network identifier corresponding to the terminal device. After the access network device obtains the cellular network identifier of the terminal device, it obtains the pre-stored capability information of the terminal device according to the cellular network identifier. If the capability information of the terminal device is not stored in the access network device, the access network device may request the terminal device to obtain the capability information according to the cellular network identifier of the terminal device. The access network device can determine whether the terminal device is a terminal device in the half-duplex mode according to the capability information of the terminal device.

By implementing this implementation manner, the access network device can obtain the capability information of the terminal device, and then determine that the terminal device is a half-duplex mode terminal device according to the capability information of the terminal device.

The embodiments of the present application also provide 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 applicable to the embodiments of the present application will be described below.

5 and 6 are schematic diagrams of a communication system provided by an embodiment of the present application. As shown in Figures 5 and 6, the communication system includes a first access network device, a second access network device, a first node, a second node, and terminal devices.

The first access network device is used to manage the first node, and the second access network device is used to manage the second node. The first access network device is the same as or different from the second access network device. Figure 5 is a schematic diagram showing the difference between the first access network device and the second access network device. Fig. 6 is a schematic diagram of the first access network device and the second access network device being the same. 5 and 6 take the communication system including 4 terminal devices as an example. Of course, the communication system may also include more than 4 terminal devices or less than 4 terminal devices, which is not limited in the embodiment of the present application.

Among them, the first access network device and the first node communicate through the cellular network air interface, the second access network device and the second node communicate through the cellular network air interface; the first node and the terminal device communicate through the first side link (sidelink) , The second node and the terminal device communicate through the second side link.

The first node is used to allocate the time-frequency resource of the first side link to the terminal equipment under the first node. The second node is used to allocate the time-frequency resource of the second side link to the terminal equipment under the second node. The terminal device under the first node refers to the terminal device associated with the first node. The terminal device under the second node refers to the terminal device associated with the second node. As shown in Figures 5 and 6, the terminal device 1 and the terminal device 2 are associated with the first node, and the terminal device 3 and the terminal device 4 are associated with the second node. The first node is responsible for allocating the first time-frequency resources of the first side link to the terminal device 1 and the terminal device 2. The second node is responsible for allocating the second time-frequency resources of the second side link to the terminal device 3 and the terminal device 4. Wherein, the first time-frequency resource and the second time-frequency resource overlap. Optionally, 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 awareness, and the second time-frequency resource may be determined after the second node performs channel awareness.

Because the first time-frequency resource and the second time-frequency resource overlap. Then, when a terminal device in area 1 receives a signal, it may be interfered by a signal sent by a second node or terminal device in area 2. Or, when the first node in area 1 receives the signal, it may be interfered by the signal sent by the second node or terminal device in area 2.

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

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

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

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

Figures 7 to 10 take the first access network device and the second access network device as an example. When the first access network device is the same as the second access network device, the same principle is used, which will not be repeated here.

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

The following further introduces the interference coordination method and equipment provided by this application.

Please refer to FIG. 11, which is a schematic flowchart of an interference coordination method provided by an embodiment of the present application. As shown in Figure 11, the interference coordination method includes the following steps 1101 to 1103, where:

1101. The first node determines the second node.

Among them, the first node is responsible for allocating the first time-frequency resource of the first side link to the terminal equipment under the first node, and the second node is responsible for allocating the second time-frequency resource of the second side link to the terminal equipment under the second node Resources, the first time-frequency resource and the second time-frequency resource have overlapping resources, the first node is managed by the first access network device, and the second node is managed by the second access network device.

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 awareness, and the second time-frequency resource may be determined after the second node performs channel awareness. 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 the second node that has overlapping side link time-frequency resources with the first node.

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

Method 1: Each node will broadcast a discovery message on the side link, and the discovery message may indicate that the corresponding node is responsible for allocating side link time-frequency resources to its associated terminal equipment. For example, the discovery message includes a scheduling group header indication, which is used to indicate that the node is responsible for allocating side link time-frequency resources for its associated terminal equipment. And the discovery message can indicate the side link time-frequency resources of the corresponding node. After the first node monitors the discovery message, it can determine whether the node sending the discovery message is the second node according to the discovery message. For example, after the first node listens to the discovery message broadcast by node 2, the first node can determine the side link time-frequency resources of node 2 based on the discovery message, and determine that node 2 is responsible for allocating side chains to its associated terminal devices Channel time-frequency resources. If the first node determines that the side link time-frequency resource possessed by the node 2 overlaps the first time-frequency resource possessed by the first node, the first node determines that the node 2 is the second node.

Manner 2: Each node will broadcast a discovery message in its own time-frequency resources, and the discovery message may indicate that the corresponding node is responsible for allocating side link time-frequency resources to its associated terminal devices. 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 the second node.

Manner 3: The first access network device instructs the second node to the first node. Specifically, the first access network device may send second information to the first node, where the second information indicates the second node. For example, the second information includes the identification of the second node. After the first node receives the second information, the second node can be determined according to the second information.

Optionally, the second information not only indicates the second node, but the second information also includes first time-frequency resource information for indicating the first time-frequency resource. That is, the first time-frequency resource is allocated by the first access network device to the first node. Optionally, the first time-frequency resource information includes one or more of carrier information, resource pool information, subchannel information, resource block information, frame number, subframe number, and time slot. The carrier information may be carrier identification or frequency point information. The resource pool may be a frequency domain resource composed of one or more radio resource blocks (resource block, RB), or a time-frequency domain resource composed of one or more RBs in a specific subframe or subframe set. There can be one or more resource pools on each carrier. Resource pools can also be divided into sending resource pools and receiving resource pools. The resources in the receiving resource pool are used to receive data, and the resources in the sending resource pool are used to send data. Among them, the resource pool information may include the following information: 1) sidelink-offset Indicator, that is, side link offset indicator. When the UE is within the coverage of the cell, the offset of the resource pool relative to the system frame number (SFN) of the cell; when the UE is outside the coverage of the cell, the resource pool is relative to the direct frame number (DFN) 2) The side link subframes included in the resource pool; 3) The number of physical resource blocks (PRBs) included in each subchannel; where the total bandwidth used for the transmission channel is divided into several subbands , A sub-band can be called a sub-channel. One subchannel may include one or more PRBs. Among them, the PRB in the full text of the embodiments of this application is the name of the RB at the physical layer. 4) The number of subchannels; 5) The starting RB index of the physical side link control channel; 6) The physical side link control channel (pysical sidelink control channel, PSCCH) and the physical side link shared channel (physical sidelink shared channel, PSSCH) is adjacent in the frequency domain. Among them, the PSCCH and PSSCH are adjacent in the frequency domain means that there is no separation between the PSCCH and the PSSCH 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 identifiers and resource pool overlap indications. As shown in Table 1 below, each node identifier in the second information corresponds to a resource overlap indication. The value of the resource overlap indicator can be 0 or 1, or the value of the resource overlap indicator is true or false. For example, the first node is node 1. The node list in Table 1 includes node 2 and node 3. If the value of the resource overlap indication corresponding to node 2 is 0 or false, it means that node 1 and node 2 do not have overlapping side link time-frequency resources. If the value of the resource overlap indication of node 2 is 1 or true, it means that node 1 and node 2 have overlapping side link time-frequency resources. Then, node 2 is the second node. Similarly, if the value of the resource overlap indication corresponding to node 3 is 0 or false, it means that node 1 and node 3 do not have overlapping side link time-frequency resources. If the value of the resource overlap indication of node 3 is 1 or true, it means that node 1 and node 3 have overlapping side link time-frequency resources. Then, node 3 is the second node. It is worth mentioning that there can be multiple nodes as the second node.

Table 1

>载波列表>Carrier List
>>载波标识>>Carrier identification
>>资源池列表>>Resource Pool List
>>>资源池信息>>>Resource Pool Information
>节点列表>Node list
>>节点标识>>Node ID
>>资源重叠指示>>Resource overlap instruction

Among them, the node identifier in Table 1 may be the L2 identifier of the node on the side link. For example, the near field communication (proximity service enable, ProSe) UE ID may also be the C-RNTI of the node in the cellular network, the cell identifier, or the MAC address or IP address of the node.

As an optional implementation manner, the second information not only indicates the second node, but the second information may also indicate the overlapping resources of the first time-frequency resource and the second time-frequency resource. Optionally, the second information may specifically indicate one or more of carriers, resource pools, subchannels, resource blocks, frames, subframes, and time slots where the first time-frequency resource and the second time-frequency resource overlap. Wherein, the carrier, resource pool, subchannel, resource block, frame, subframe, and time slot herein may refer to the carrier, resource pool, subchannel, resource block, frame, subframe, and time slot in the 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 filter the second node based on the overlapping resource and only send the first information to some second nodes, which is beneficial to saving transmission resources. For example, if the third time-frequency resource is a time-frequency resource interfered by a signal by the first device, the first device is the first node or a terminal device managed by the first node. The first node may determine a target second node whose time-frequency resource and the third time-frequency resource overlap from a plurality of second nodes according to the overlapping resource. That is, 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, it only needs to send the first information to the target second node.

For example, take the second information specifically indicating the carrier overlapped by the first node and the second node as an example. The access network device may send the second information in the format of Table 2 below to indicate the carrier overlapped by the first node and the second node. As shown in Table 2 below, one carrier identifier corresponds to one node list. There are one or more node IDs under the node list. Each node identifier corresponds to a resource overlap indication. The value of the resource overlap indicator can be 0 or 1, or the value of the resource overlap indicator is true or false. For example, the first node is node 1, the carrier identifier in Table 2 below is the identifier of carrier 1, and the node list includes the identifier of node 2. If the value of the resource overlap indication corresponding to the identifier of node 2 is 0 or false, it means that node 1 and node 2 do not overlap on carrier 1. If the value of the resource overlap indication of node 2 is 1 or true, it means that node 1 and node 2 overlap on carrier 1. Then, node 2 is the second node.

Table 2

>载波列表>Carrier List
>>载波标识>>Carrier identification
>>节点列表>>Node list
>>>节点标识>>>Node ID
>>>资源重叠指示>>>Resource overlap instruction
>>资源池列表>>Resource Pool List
>>>资源池信息>>>Resource Pool Information

For another example, take the second information specifically indicating the carrier and resource pool overlapped by the first node and the second node as an example. The access network device may send the second information in the format of Table 3 below to indicate the carrier and resource pool overlapped by the first node and the second node. As shown in Table 3 below, one carrier identifier corresponds to one resource pool list, and one resource pool list has one or more resource pool information. Each resource pool information corresponds to a node list. There are one or more node IDs under the node list. Each node identifier corresponds to a resource overlap indication. The value of the resource overlap indicator can be 0 or 1, or the value of the resource overlap indicator is true or false. 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 information of resource pool 1, and the node list includes the identifier of node 2. If the value of the resource overlap indication corresponding to the identifier of the node 2 is 0 or false, it means that the side link time-frequency resources of the node 1 and the node 2 do not overlap on the resource pool 1 of the carrier 1. If the value of the resource overlap indication of node 2 is 1 or true, it means that the side link time-frequency resources of node 1 and node 2 overlap on the resource pool 1 of carrier 1. Then, node 2 is the second node.

table 3

>载波列表>Carrier List
>>载波标识>>Carrier identification
>>资源池列表>>Resource Pool List
>>>资源池信息>>>Resource Pool Information
>>>节点列表>>>Node list
>>>>节点标识>>>>Node ID
>>>>资源重叠指示>>>>Resource overlap instruction

The second information indicates the overlapping subchannels, resource blocks, frames, subframes, and time slots of the first time-frequency resource and the second time-frequency resource. The same is true, and details are not repeated here. 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 can send the second information in the format of Table 1 above, so that the first node can only determine the first time-frequency resource and the second node based on the second information in the format of Table 1 above, and cannot determine the first The specific resource that the node overlaps with the second node.

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

Wherein, after determining the second node, the first node sends the first information to the second node. The first information is used to indicate the third time-frequency resource for interference coordination. Wherein, the third time-frequency resource is all or part of the overlapping 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 can determine the second node with overlapping side link time-frequency resources, and send the first node of the third time-frequency resource for indicating interference coordination to the second node. information. Therefore, the second node can perform interference coordination according to the first information. It can be seen that interference coordination can be performed by implementing the method described in FIG. 11.

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

Manner 1: The second node determines the third time-frequency resource according to the first information. The second node schedules a terminal device whose distance from the second node is less than a preset distance on the frequency domain resource of the third time-frequency resource. The second node does not schedule a terminal device whose distance from the second node is greater than a preset distance on the frequency domain resource of the third time-frequency resource. Since the distance between the second node and the scheduled terminal device is relatively short, the second node or the scheduled terminal device can reduce the transmission power, thereby reducing the interference to the first node or the terminal device under the first node .

The device whose distance from the second node is less than the preset distance is the cell center device. The device whose distance from the second node is greater than the preset distance is a cell edge device. In the first manner, 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 interfered by the signal or the terminal device interfered by the signal under the first node. Therefore, it is not easy for the cell center device to attack the first node or the first node on the frequency domain resources of the third time-frequency resource. The terminal equipment under the node causes interference.

Manner 2: The second node determines the third time-frequency resource according to the first information. The second node determines the interference source device that 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 the subsequent fourth time-frequency resource of 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, it can adjust the subsequent time-frequency resource information of the first node interfered with the signal or the terminal equipment interfered with the signal under the first node to the fifth time-frequency resource. The fifth time-frequency resource is different from the fourth time-frequency resource.

In side link communication, there are mainly two transmission modes, namely the scheduling mode and the UE selection mode. When the terminal device managed by the first node adopts the UE selection mode, after the terminal device performs channel awareness by itself, it selects an appropriate resource pool from the sending resource pool and/or receiving resource pool broadcast by the first node for communication, or Select an appropriate resource pool for communication from the configured sending resource pool and/or receiving resource pool. When the terminal device managed by the first node adopts the scheduling mode, the first node dynamically allocates one-time resources or semi-persistent scheduling (SPS) resources for the terminal device. Therefore, in the second method, if the terminal device that is interfered by the signal under the first node is a terminal device that adopts the scheduling mode, the first node can use dynamic allocation or semi-static after receiving the fourth time-frequency resource information. The scheduling method allocates the fifth time-frequency resource to the terminal equipment interfered by the signal under the first node. If the terminal device interfered by the signal under the first node is a terminal device that adopts the UE selection mode, after the first node receives the fourth time-frequency resource information, it can notify the terminal device interfered with the signal under the first node to subsequently use the first node. Five time-frequency resources, or notify the terminal equipment interfered by the signal under the first node to avoid the fourth time-frequency resource subsequently.

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

In the second method, the second node may not adjust the subsequent time-frequency resources of the second device, but notify the first node of the subsequent time-frequency resources of the second device, and the first node adjusts the first node or the first node interfered by the signal. The subsequent time-frequency resources of the terminal equipment interfered by the signal under a node make the subsequent time-frequency resources of the first node interfered by the signal or the subsequent time-frequency resources of the signal interfered by the first node avoid the subsequent time-frequency resources of the second device.

Manner 3: The second node determines the 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 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 can continue to schedule the first node interfered by the signal or the terminal equipment interfered by the signal under the first node in the frequency domain resource of the third time-frequency resource.

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

In the third manner, the first node does not need to adjust the first node interfered by the signal or the terminal equipment interfered by the signal under the first node to prepare subsequent time-frequency resources. The second node adjusts the time-frequency resource of the interference source device so that the subsequent time-frequency resource of the interference source device avoids the subsequent time-frequency resource of the first node interfered by the signal or the terminal device 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 a terminal device under the first node that is interfered by a signal. The first information also indicates the subsequent fifth time-frequency resource of the first device. A specific implementation manner for the second node to perform interference coordination according to the first information is: the second node determines the third time-frequency resource and the fifth time-frequency resource according to the first information. The second node determines the interference source device according to the third time-frequency resource, where the interference source device is the interference source device that causes interference to the first node or the terminal device under the first node. The second node adjusts the subsequent time-frequency resource of the interference source device to the 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 that adopts a scheduling mode, the second node may allocate the fourth time-frequency resource to the interference source device in a dynamic allocation manner or a semi-static scheduling manner. If the interference source device is a terminal device that adopts the UE selection mode, the second node may notify the interference source device to subsequently use the fourth time-frequency resource, or notify the interference source device to avoid the fifth time-frequency resource subsequently.

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

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

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

The terminal device under the first node may send third information to the first node after detecting that it is subject to signal interference. The third information is used to indicate the carrier affected by the signal interference of the terminal equipment under the first node, the resource pool of the terminal equipment under the first node affected by the signal interference, the subchannels of the terminal equipment under the first node affected by the signal, and the first One or more of resource blocks interfered by the signal by the device, and frames, subframes, or time slots in which the terminal device under the first node is interfered by the signal.

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

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

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

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

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

If the first node allocates a single subchannel or a single PRB of the resource pool 1 and a single subchannel or a single PRB of the resource pool 2 to the terminal equipment under the first node. Then the third information sent by the terminal device only needs to indicate the interfered resource pool, and the first node can determine the interfered third time-frequency resource of the terminal device based on the third information. For example, if the first node allocates subchannel 1 or PRB1 of the resource pool 1 of carrier 1 and subchannel 2 or PRB2 of the resource pool 2 to the terminal equipment under the first node. The third information sent by the terminal device indicates that the interfered resource pool is resource pool 1. After the first node receives the third information, it can determine that the terminal device has suffered interference in subchannel 1 or PRB1 of the resource pool 1 of carrier 1.

If the first node allocates a single subchannel or a single PRB of the resource pool 1 under carrier 1 to the terminal equipment under the first node, and a single subchannel or a single PRB under the resource pools under other carriers. Then the third information sent by the terminal device only needs to indicate the interfered carrier and resource pool, and the first node can determine the third time-frequency resource that the terminal device is interfered with based on the third information. For example, if the first node allocates subchannel 1 or PRB1 of the resource pool 1 of carrier 1 and subchannel 2 or PRB2 of the resource pool 2 of carrier 2 to the terminal equipment 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 the first node receives the third information, it can determine that the terminal device has suffered interference in subchannel 1 or PRB1 of the resource pool 1 of carrier 1.

If the first node allocates several subchannels or PRBs under several resource pools under several carriers to the terminal equipment under the first node. Then the third information sent by the terminal device needs to indicate the interfered carrier, resource pool, and subchannel, or the third information sent by the terminal device needs to indicate the carrier logo, resource pool, and PRB. For example, if the first node allocates subchannel 1 and subchannel 2 of resource pool 1 under carrier 1, and subchannel 3 and subchannel 4 of resource pool 2 under carrier 2 for terminal equipment 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 subchannel is subchannel 1. After the first node receives the third information, it can determine that the terminal device is interfered in subchannel 1 of the resource pool 1 of carrier 1.

As an optional implementation manner, if the third time-frequency resource is a time-frequency resource of the first node or terminal equipment under the first node that is interfered with by a signal, the first information may include an overload indication (OI) Bitmap, the first information indicates the third time-frequency resource through the OI bitmap. In the OI bitmap, each bit corresponds to a PRB or a subchannel. When the bit value is 1, it means that the corresponding PRB or sub-channel is subject to strong interference; otherwise, it is not subject to strong interference.

As an optional implementation manner, the third time-frequency resource may also be a time-frequency resource that is not interfered by the first node or the terminal equipment under the first node. For example, the third time-frequency resource may be a low-interference sensitive time-frequency resource for the terminal device under the first node, that is, the terminal device under the first node of the third time-frequency resource can only withstand small interference, but cannot withstand relatively high interference. Big interference. The first information may include a high interference indication (HII) bitmap, and the first information indicates the third time-frequency resource through the HII bitmap. HII also corresponds to one bit for each PRB or each sub-channel. When the bit value is 1, it means that the terminal equipment under the first node is highly sensitive to interference in the corresponding PRB or sub-channel, and vice versa.

In this optional implementation manner, the specific implementation manner in which the second node performs interference coordination according to the first information may be: the second node schedules a terminal whose distance from the second node is less than a preset distance on the third time-frequency resource equipment. The second node schedules a terminal device whose distance from the second node is greater than a preset distance on a time-frequency resource other than the third time-frequency resource.

The device whose distance from the second node is less than the preset distance is the cell center device. The device whose distance from the second node is greater than the preset distance is a cell edge device. In this optional implementation manner, 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. Therefore, it is not easy for the cell center device to cause interference to the terminal device under the first node on the frequency domain resource of the third time-frequency resource.

Please refer to FIG. 13, which is a schematic structural diagram of a communication device disclosed in an embodiment of the present application. The communication device shown in FIG. 13 may include various functional modules corresponding to the method in the foregoing method embodiment one-to-one. In a specific implementation, the communication device includes a processor 1301, a memory 1302, and a communication interface 1303. Among them, the processor 1301, the memory 1302 and the communication interface 1303 are connected.

The processor 1301 may be a central processing unit (English: central processing unit, abbreviation: CPU), a network processor (English: network processor, abbreviation: NP), or a combination of CPU and NP. The processor may also be an application-specific integrated circuit (English: application-specific integrated circuit, abbreviation: ASIC), a programmable logic device (English: programmable logic device, abbreviation: PLD) or a combination thereof. The above-mentioned PLD can be a complex programmable logic device (English: complex programmable logic device, abbreviation: CPLD), field programmable logic gate array (English: field-programmable gate array, abbreviation: FPGA), general array logic (English: generic array) logic, abbreviation: GAL) or any combination thereof. The processor 1301 may refer to one processor, or may include multiple processors. The memory 1302 may include a volatile memory (English: volatile memory), such as a random access memory (English: random-access memory, abbreviation: RAM); the memory may also include a non-volatile memory (English: non-volatile memory) , Such as read-only memory (English: read-only memory, abbreviation: ROM), flash memory (English: flash memory), hard disk (English: hard disk drive, abbreviation: HDD) or solid state drive (English: solid-state drive) , Abbreviation: SSD); the memory 1302 may also include a combination of the foregoing types of memory. The memory 1302 may refer to one memory, or may include multiple memories.

Among them, the communication interface 1303 is used to implement communication with other devices.

Wherein, the processor 1301 calls the program code stored in the memory 1302 to execute the steps performed by the access network device or the first node in the foregoing method embodiment.

The memory 1302 stores computer-readable instructions, and the computer-readable instructions include multiple software modules. As an optional implementation manner, the multiple software modules may include a receiving module, a sending module, and a processing module. Among them, the receiving module can be used to perform the receiving action of the access network device in the above method embodiment, the sending module can be used to perform the sending action of the access network device in the above method embodiment, and the processing module can be used to perform the access in the above method embodiment. Processing actions such as confirmation of network equipment. Alternatively, the receiving module can be used to perform the receiving action of the first node in the above method embodiment, the sending module can be used to perform the sending action of the first node in the above method embodiment, and the processing module can be used to perform the receiving action of the first node in the above method embodiment. Processing actions such as confirmation and data processing.

Based on the same inventive concept, the communication device provided in the embodiment of the present application has a principle of solving the problem similar to the principle of the access network device or the first node in the method embodiment of the present application. Therefore, the implementation of each device can refer to the implementation of the method. For concise description, I won't repeat it here.

In the above-mentioned embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in an embodiment, reference may be made to related descriptions of other embodiments.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the application, not to limit them; although the application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand: It is still possible to modify the technical solutions described in the foregoing embodiments, or equivalently replace some or all of the technical features; these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the embodiments of the application range.

Claims

A resource allocation method, characterized in that the method includes:

The access network device receives a first message from the first node, where the first message is used to indicate that the terminal device is associated with the first node;

Receiving, by the access network device, 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;

Allocating, by the access network device, the first time-frequency resource of the first side link to the terminal device;

Allocating, by the access network device, a second time-frequency resource of a second side link to the terminal device, the first time-frequency resource and the second time-frequency resource do not overlap;

The access network device sends first time-frequency resource information to the first node, and sends second time-frequency resource information to the second node, where the first time-frequency resource information indicates the first time-frequency resource Resource, the second time-frequency resource information indicates the second time-frequency resource.
The method according to claim 1, wherein 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 through the first side link, and the second node and the terminal device communicate through the second side link.
The method according to claim 1 or 2, wherein the terminal device is a terminal device in a half-duplex mode.
The method according to claim 3, wherein the first message further includes the identification of the terminal device on the first side link or the second message further includes the terminal device on the first side link. The identification of the two-side link, the method further includes:

Acquiring, by the access network device, the capability information of the terminal device according to the identification of the terminal device on the first side link or the identification of the second side link;

The access network device determines that the terminal device is a terminal device in a half-duplex mode according to the capability information of the terminal device.
A resource allocation method, characterized in that the method includes:

The first node receives a first request from the terminal device, where the first request is used to request to establish an association with the first node;

Sending, by the first node, a first message to an access network device, where the first message is used to indicate that the terminal device is associated with the first node;

The first node receives first time-frequency resource information from the access network device, the first time-frequency resource information indicates a first time-frequency resource, and the first time-frequency resource is The time-frequency resource of the first side link allocated by the terminal device, the first time-frequency resource and the second time-frequency resource do not overlap, and the second time-frequency resource is used by the access network device The time-frequency resource of the second side link allocated by the terminal device.
The method according to claim 5, wherein the access network device and the first node communicate through a cellular network air interface; the first node and the terminal device communicate through the first side link .
The method according to claim 5 or 6, wherein the terminal device is a terminal device in a half-duplex mode.
The method according to claim 7, wherein the first message further includes an identifier of the terminal device on the first side link.
An interference coordination method, characterized in that the method includes:

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

The first node sends first information to the second node, where the first information is used to indicate a third time-frequency resource for interference coordination, and the third time-frequency resource is part or all of the overlapping resources.
The method according to claim 9, wherein the first node to determine the second node comprises:

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

The first node determines the second node according to the second information.
The method according to claim 10, wherein the second information further indicates the overlapping resources between the first node and the second node.
The method according to any one of claims 9 to 11, wherein the third time-frequency resource is a time-frequency resource of a terminal device under the first node that is interfered by a signal, and the method further comprises:

The first node receives third information from the terminal equipment under the first node, where the third information is used to indicate one or more of the following: the carrier of the terminal equipment under the first node that is interfered by the signal, The resource pool of the terminal device under the first node that is interfered by the signal, the subchannel that the terminal device under the first node is interfered with by the signal, the resource block that the first device is interfered with by the signal, and the first device is trusted Frame, sub-frame or time slot with interference;

The first node determines the third time-frequency resource according to the third information.
A communication device, characterized in that the communication device includes:

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

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

A processing module, configured to allocate the first time-frequency resource of the 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.
The communication device according to claim 13, wherein the communication device and the first node communicate through a cellular network air interface, and the communication device and the second node communicate through a cellular network air interface; the first The 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.
The communication device according to claim 13 or 14, wherein the terminal device is a terminal device in a half-duplex mode.
The communication device according to claim 15, wherein the first message further includes the identification of the terminal device on the first side link or the second message further includes the terminal device on the The identification of the second side link,

The processing module is further configured to obtain capability information of the terminal device according to the identification of the terminal device on the first side link or the identification of 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.
A communication device, characterized in that the communication device includes:

A receiving module, configured to receive a first request from a terminal device, the first request being used to request to establish an association with the communication device;

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

The receiving module is further configured to receive first time-frequency resource information from the access network device, where the first time-frequency resource information indicates a first time-frequency resource, and the first time-frequency resource is the access The time-frequency resource of the first side link allocated by the network device to the terminal device, the first time-frequency resource and the second time-frequency resource do not overlap, and the second time-frequency resource is the access network The time-frequency resource of the second side link allocated by the device to the terminal device.
The communication device according to claim 17, wherein the access network device and the communication device communicate through a cellular network air interface; the communication device and the terminal device communicate through the first side link.
The communication device according to claim 17 or 18, wherein the terminal device is a terminal device in a half-duplex mode.
The communication device according to claim 19, wherein the first message further includes an identifier of the terminal device on the first side link.
A communication device, characterized in that the communication device includes:

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

The communication module is configured to send first information to the second node, where the first information is used to indicate a third time-frequency resource for interference coordination, and the third time-frequency resource is part or all of the overlapping resources.
The communication device according to claim 21, wherein the method for the processing module to determine the second node is specifically:

Receiving second information from the first access network device, where the second information indicates the second node;

Determine the second node according to the second information.
The communication device according to claim 22, wherein the second information further indicates the overlapping resources between the communication device and the second node.
The communication device according to any one of claims 22 to 23, wherein the third time-frequency resource is a time-frequency resource of a terminal device under the communication device that is interfered with by a signal,

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 carrier wave of the terminal device under the communication device that is interfered by a signal , The resource pool of the terminal device under the communication device that is interfered by the signal, the subchannel that the terminal device under the communication device is interfered with by the signal, and the resource block that the first device is interfered with by the signal, the first device is affected by the signal Interfering frames, subframes or time slots;

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