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WO2020221199A1 - Procédé et dispositif d'attribution de ressources - Google Patents

Procédé et dispositif d'attribution de ressources Download PDF

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Publication number
WO2020221199A1
WO2020221199A1 PCT/CN2020/087221 CN2020087221W WO2020221199A1 WO 2020221199 A1 WO2020221199 A1 WO 2020221199A1 CN 2020087221 W CN2020087221 W CN 2020087221W WO 2020221199 A1 WO2020221199 A1 WO 2020221199A1
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WO
WIPO (PCT)
Prior art keywords
node
time
terminal device
frequency resource
information
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2020/087221
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English (en)
Chinese (zh)
Inventor
罗海燕
戴明增
曾清海
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Publication date
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Publication of WO2020221199A1 publication Critical patent/WO2020221199A1/fr
Anticipated expiration legal-status Critical
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/541—Allocation or scheduling criteria for wireless resources based on quality criteria using the level of interference
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality

Definitions

  • This application relates to the field of communications technology, and in particular to a method and equipment for resource allocation.
  • 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 .
  • D2D device-to-device
  • the Internet of Vehicles is considered, and the vehicle to everything (V2X) communication method is introduced.
  • V2X vehicle to everything
  • 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.
  • 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.
  • the dotted line represents the control plane
  • the solid line represents the user plane.
  • the second node is responsible for managing the terminal device 3 and the terminal device 4 in the area 2.
  • 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.
  • a terminal device can also be managed by multiple nodes at the same time.
  • both the first node and the second node are responsible for managing the terminal device 2.
  • how to reasonably allocate side link time-frequency resources to the terminal device is a problem to be solved urgently.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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
  • 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.
  • 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.
  • 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.
  • the terminal device is a terminal device in a half-duplex mode.
  • the first message further includes the identification of the terminal device on the first side link.
  • 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.
  • 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.
  • 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.
  • 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.
  • the second information further indicates the overlapping resources between the first node and the second node.
  • 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.
  • 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.
  • 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.
  • a communication device may be an access network device or a first node.
  • 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.
  • 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 foregoing modules can be implemented by hardware, or by hardware executing corresponding software.
  • 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
  • the processing module may perform processing actions such as determination in the foregoing method embodiment.
  • the communication device may also be an access network device or a chip in the first node.
  • the communication device is used to implement the first aspect and the first aspect described above. Any one of the selected implementation methods.
  • 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.
  • 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.
  • a communication device in a fifth aspect, 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.
  • 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.
  • 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.
  • 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.
  • a computer program product 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.
  • a 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.
  • instructions which when run on a computer, cause the computer to execute the first to third aspects and the first aspect.
  • a communication system in an eighth aspect, 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.
  • 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.
  • 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.
  • Fig. 2 is a schematic diagram of a communication system provided by an embodiment of the present application.
  • 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
  • the terminal device 3 is associated with the second node.
  • Figure 2 takes as an example the communication system including three terminal devices.
  • 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.
  • the access network device and the first node communicate through the cellular network air interface
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • the multiple nodes often cannot reasonably allocate side link time-frequency resources to the terminal device.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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 .
  • 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.
  • 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 .
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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 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.
  • the first node instructs the terminal device 2 to receive data or send data in the first time-frequency resource.
  • the second node instructs the terminal device 2 to receive data or send data in the second time-frequency resource.
  • 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
  • the first time-frequency resource is an absolute complement of the second time-frequency resource.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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 .
  • 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.
  • eNB evolved base station
  • eNodeB evolutional node B
  • CRAN cloud radio access network
  • the access network equipment in the 5G network such as gNB; or it can be a small station, a micro
  • 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.
  • SIP session initiation protocol
  • WLL wireless local loop
  • PDAs personal digital assistants
  • 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.
  • FIG. 3 is a schematic flowchart of a resource allocation method provided by an embodiment of the present application.
  • the data transmission method includes the following steps 301 to 308, where:
  • the terminal device sends a first request to a first node.
  • the first request is used to request to establish an association with the first node.
  • the terminal device may be the terminal device 2 in FIG. 2.
  • the terminal device sends the first request to the first node through the first side link.
  • the first node sends a first message to the access network device.
  • the first node 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.
  • the first node 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.
  • 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.
  • 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.
  • 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.
  • the identification of the terminal device may be the cellular network identification of the terminal device.
  • the cellular network identifier of the terminal device may be composed of a cell radio network temporary identifier (C-RNTI) and a cell identifier.
  • C-RNTI cell radio network temporary identifier
  • the identification of the terminal device may be a station ID (station ID) used to uniquely identify the terminal device.
  • station ID station ID
  • the station ID is included in the first request.
  • the station ID is included in the application layer or V2X layer or MAC header;
  • 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.
  • 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.
  • the first node 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.
  • 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.
  • the terminal device sends a second request to the second node.
  • the second request is used to request to establish an association with the second node.
  • the terminal device sends the second request to the second node through the second side link.
  • the second node sends a second message to the access network device.
  • the second node 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.
  • the second node 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.
  • 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.
  • 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.
  • 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.
  • the identification of the terminal device may be the cellular network identification of the terminal device.
  • the cellular network identifier of the terminal device may be composed of a cell radio network temporary identifier (C-RNTI) and a cell identifier.
  • C-RNTI cell radio network temporary identifier
  • the identification of the terminal device may be a station ID (station ID) used to uniquely identify the terminal device.
  • 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.
  • 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.
  • the access network device allocates the first time-frequency resource of the first side link to the terminal device.
  • the access network device allocates the second time-frequency resource of the second side link to the terminal device.
  • the access network device 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.
  • step 305 may be performed first, and then step 306, or step 306 may be performed first, and then step 305 may be performed.
  • the access network device sends the first time-frequency resource information to the first node.
  • 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.
  • RRC radio resource control
  • the access network device sends the second time-frequency resource information to the second node.
  • 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.
  • step 307 may be performed first, and then step 308, or step 308 may be performed first, and then step 307 may be performed.
  • the access network device 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
  • the second time-frequency resource information indicates the second time-frequency resource.
  • the terminal device may be a terminal device in a half-duplex mode or a terminal device in a full-duplex mode.
  • the terminal device is a terminal device in a half-duplex mode
  • the first time-frequency resource receives data or sends data
  • the second time-frequency resource is used for the terminal device to receive data or send data.
  • the first time-frequency resource is a time-frequency resource for the terminal device to receive data
  • the second time-frequency resource is a time-frequency resource for the terminal device to send data.
  • the first node designates the terminal device to receive data in the first time-frequency resource.
  • the second node specifies the terminal device to send data in the second time-frequency resource.
  • the first time-frequency resource is a time-frequency resource for the terminal device to send data
  • the second time-frequency resource is a time-frequency resource for the terminal device to receive data.
  • the first node specifies the terminal device to send data in the first time-frequency resource.
  • the second node designates the terminal device to receive data in the second time-frequency resource.
  • the first time-frequency resource is a time-frequency resource for the terminal device to send data
  • the second time-frequency resource is a time-frequency resource for the terminal device to send data.
  • the first time-frequency resource is a time-frequency resource for the terminal device to receive data
  • the second time-frequency resource is a time-frequency resource for the terminal device to receive data.
  • 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.
  • 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.
  • the first node designates the terminal device to receive or send data in the second time-frequency resource.
  • the second node designates the terminal device to receive or send data in the first time-frequency resource.
  • 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.
  • the first time-frequency resource is used for the terminal device to receive data
  • the second time-frequency resource is used for the terminal device to receive data.
  • the first node designates the terminal device to receive data in the first time-frequency resource.
  • the second node designates the terminal device to receive data in the second time-frequency resource.
  • the first time-frequency resource is used for the terminal device to send data
  • the second time-frequency resource is used for the terminal device to send data.
  • the first node specifies the terminal device to send data in the first time-frequency resource.
  • the second node 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.
  • 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 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.
  • the first node designates the terminal device to receive or send data in the second time-frequency resource.
  • 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.
  • 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.
  • 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:
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • the access network 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.
  • 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.
  • FIGS. 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
  • 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.
  • 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.
  • the terminal device 1 and the terminal device 2 are associated with the first node
  • 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.
  • the first time-frequency resource and the second time-frequency resource overlap.
  • the first time-frequency resource and the second time-frequency resource may be allocated by the access network device.
  • the first time-frequency resource may be determined after the first node performs channel awareness
  • the second time-frequency resource may be determined after the second node performs channel awareness.
  • 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.
  • the first node sends a signal to the terminal device 2 through the first side link on a certain time-frequency resource
  • 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.
  • the first node sends a signal to the terminal device 2 through the first side link on a certain time-frequency resource
  • 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.
  • the terminal device 2 sends a signal to the first node through the first side link on a certain time-frequency resource
  • 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.
  • 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.
  • 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.
  • embodiments of the present application provide an interference coordination method and device.
  • FIG. 11 is a schematic flowchart of an interference coordination method provided by an embodiment of the present application.
  • the interference coordination method includes the following steps 1101 to 1103, where:
  • the first node determines the second node.
  • 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
  • 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
  • the second node is managed by the second access network device.
  • the first time-frequency resource and the second time-frequency resource may be allocated by the access network device.
  • the first time-frequency resource may be determined after the first node performs channel awareness
  • 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.
  • the first node needs to determine the second node that has overlapping side link time-frequency resources with the first node.
  • the first node may determine the second node in the following two ways.
  • 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.
  • 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.
  • the discovery message can indicate the side link time-frequency resources of the corresponding node.
  • 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.
  • 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.
  • the first access network device instructs the second node to the first node.
  • the first access network device may send second information to the first node, where the second information indicates the second node.
  • the second information includes the identification of the second node.
  • the second node can be determined according to the second information.
  • 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.
  • 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 resource pool information may include the following information: 1) sidelink-offset Indicator, that is, side link offset indicator.
  • SFN system frame number
  • DFN direct frame number
  • PRB physical resource blocks
  • the PRB in the full text of the embodiments of this application is the name of the RB at the physical layer.
  • 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.
  • 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.
  • the format and included content of the second information may be 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.
  • 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.
  • 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.
  • node 2 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.
  • the node identifier in Table 1 may be the L2 identifier of the node on the side link.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • the first node is node 1
  • the carrier identifier in Table 2 below is the identifier of carrier 1
  • the node list includes the identifier of node 2.
  • node 2 is the second node.
  • 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.
  • Table 3 shows that 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.
  • 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.
  • 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
  • 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.
  • 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 second information may not indicate the side link time-frequency resources where the first time-frequency resource and the second time-frequency resource overlap.
  • 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.
  • the first node sends the first information to the second node.
  • the first node 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.
  • 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.
  • the second node performs interference coordination according to the first information.
  • the second node after receiving the first information, the second node performs interference coordination according to the first information.
  • 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.
  • 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:
  • 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.
  • 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.
  • 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.
  • the scheduling mode there are mainly two transmission modes, namely the scheduling mode and the UE selection mode.
  • 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.
  • 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.
  • SPS semi-persistent scheduling
  • 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.
  • the second node may determine the device that uses the third time-frequency resource to send data as the interference source device.
  • the interference source device may be a second node or a terminal device managed by the second node.
  • 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.
  • 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.
  • the second node may determine the device that uses the third time-frequency resource to send data as the interference source device.
  • the interference source device may be a second node or a terminal device managed by the second node.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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:
  • 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.
  • the first node determines the third time-frequency resource according to the third information.
  • the first node determines the third time-frequency resource according to the third information.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • the first information may include an overload indication (OI) Bitmap, the first information indicates the third time-frequency resource through the OI bitmap.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • FIG. 13 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.
  • 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.
  • the communication interface 1303 is used to implement communication with other devices.
  • 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.
  • the multiple software modules may include a receiving module, a sending module, and a processing module.
  • 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
  • the processing module can be used to perform the access in the above method embodiment. Processing actions such as confirmation of network equipment.
  • 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
  • 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.
  • 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.

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Abstract

Des modes de réalisation de la présente invention concernent un procédé d'attribution de ressources et un dispositif de communication. Le procédé comprend : la réception, par un dispositif de réseau d'accès, d'un premier message depuis un premier nœud, le premier message indiquant qu'un dispositif terminal est associé au premier nœud ; la réception, par le dispositif de réseau d'accès, d'un second message depuis un second nœud, le second message indiquant que le dispositif terminal est associé au second nœud ; l'attribution, par le dispositif de réseau d'accès, d'une première ressource temps-fréquence d'une première liaison latérale au dispositif terminal ; l'attribution, par le dispositif de réseau d'accès, d'une seconde ressource temps-fréquence d'une seconde liaison latérale au dispositif terminal, la première ressource temps-fréquence et la seconde ressource temps-fréquence ne se chevauchant pas ; et l'envoi, par le dispositif de réseau d'accès, de premières informations de ressource temps-fréquence au premier nœud, et l'envoi de secondes informations de ressource temps-fréquence au second nœud, les premières informations de ressource temps-fréquence indiquant la première ressource temps-fréquence et les secondes informations de ressource temps-fréquence indiquant la seconde ressource temps-fréquence.
PCT/CN2020/087221 2019-04-30 2020-04-27 Procédé et dispositif d'attribution de ressources Ceased WO2020221199A1 (fr)

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