WO2023124753A1 - Procédé et appareil d'attribution de ressources pour communication d2d, et support et produit de programme - Google Patents

Procédé et appareil d'attribution de ressources pour communication d2d, et support et produit de programme Download PDF

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Publication number
WO2023124753A1
WO2023124753A1 PCT/CN2022/135930 CN2022135930W WO2023124753A1 WO 2023124753 A1 WO2023124753 A1 WO 2023124753A1 CN 2022135930 W CN2022135930 W CN 2022135930W WO 2023124753 A1 WO2023124753 A1 WO 2023124753A1
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Prior art keywords
time domain
domain resource
idle time
user equipment
resource information
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PCT/CN2022/135930
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English (en)
Chinese (zh)
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田雷
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华为技术有限公司
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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
    • H04W72/02—Selection of wireless resources by user or terminal
    • 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
    • H04W72/40—Resource management for direct mode communication, e.g. D2D or sidelink
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/53—Allocation or scheduling criteria for wireless resources based on regulatory allocation policies

Definitions

  • the present application relates to the field of communication technologies, and in particular to a resource allocation method, device, medium, and program product for device-to-device (device-to-device, D2D) communication.
  • D2D device-to-device
  • a central network includes a management device and several member devices.
  • the flow diagram of member devices accessing a central network when a member device needs to join a central network, it needs to first search for a management device and send a message 1 (message1, MSG1). After receiving the MSG1, the management device will send a message 2 (message2, MSG2) to the member devices, and allocate access resource candidate lists to the member devices. The member device sends a message 3 (message3, MSG3) after receiving the MSG2 sent by the management device. After receiving the MSG3 of the member device, the management device will authenticate the member device, and send the authentication result to the member device through message 4 (message4, MSG4). If the authentication is passed, service resources are allocated to the member equipment, and service data can only be sent when the member equipment has service resources.
  • the access network device When the cellular network allocates access resources, the access network device indicates the resource location of the message 3 in the message 2, the message 2 is scrambled with the radio network temporary identity (RNTI), and the user of the message 2 is descrambled correctly
  • the device user equipment, UE directly uses the authorized resources it carries to send message 3.
  • access resources cannot be allocated to multiple user equipments at the same time.
  • Long term evolution long term evolution
  • V2X interception and resource reservation is an autonomous resource allocation scheme for user equipment based on a decentralized network. Before each user equipment needs to send service data, it first listens for a period of time, and excludes the resources already used by other user equipment according to the intercepted sidelink control information (SCI) and signal energy, and then Randomly select from the remaining resource sets to obtain the sending resources of the user equipment.
  • SCI sidelink control information
  • the user equipment since the user equipment first excludes the resources already occupied by other user equipments when performing resource selection, and then randomly selects the remaining idle resources, when multiple user equipments perform resource selection at the same time, there will be a certain probability that the same resources will be selected. transfer resources.
  • FIG. 3 which is a schematic diagram of a hidden user equipment
  • FIG. 3 which is a schematic diagram of a hidden user equipment
  • User equipment 2 and user equipment 3 need to send data at the same time. Due to the long distance between user equipment 2 and user equipment 3, user equipment 2 and user equipment 3 cannot detect each other.
  • the resources selected by user equipment 2 and user equipment 3 It may be the same transmission resource, so user equipment 1 located between user equipment 2 and user equipment 3 cannot normally receive data from user equipment 2 and user equipment 3 .
  • the D2D non-network coverage resource selection defined by the 3rd generation partnership project (3GPP) is based on random resource selection, and the user equipment randomly selects transmission resources for transmission when it needs to transmit data.
  • 3GPP 3rd generation partnership project
  • the present application provides a D2D communication resource allocation method, device, medium, and program product, so as to realize reliable D2D communication resource allocation and avoid resource conflicts when multiple user equipments access at the same time.
  • a resource allocation method for D2D communication includes: a first user equipment sends an access request to a second user equipment; the first user equipment receives an access request from the second user equipment Responding, the access response includes first idle time domain resource information of the second user equipment, and the first idle time domain resource information is used to indicate at least one first idle time domain resource; the first user equipment Determine a third idle time domain resource according to the first idle time domain resource information and the second idle time domain resource information, the second idle time domain resource information includes at least one second idle time domain resource determined according to the current channel sensing result a time domain resource, the third idle time domain resource is an idle time domain resource in the intersection of the at least one first idle time domain resource and the at least one second idle time domain resource; and the first user The device sends a link establishment request message to the second user equipment according to the third idle time domain resource.
  • the first user equipment can accurately determine the idle time domain resource for sending the link establishment request message according to the first idle time domain resource information of the second user equipment and the second idle time domain resource information determined by itself, reliably Realize resource allocation for D2D communication in a more efficient manner, and avoid resource conflicts when multiple user equipments access at the same time.
  • the access response further includes a maximum number of retransmissions.
  • the access response also includes a maximum number of retransmissions, and the first user equipment can retransmit the link establishment request message on idle time domain resources specified within the maximum number of retransmissions, which improves the reliability of D2D communication.
  • the method further includes: when the link establishment request message fails to be sent by the first user equipment, according to the first idle time domain resource information, the second idle time domain Resource information and the maximum number of retransmissions determine a fourth idle time domain resource, where the fourth idle time domain resource is an intersection of the at least one first idle time domain resource and the at least one second idle time domain resource one idle time domain resource; and the first user equipment retransmits the link establishment request message to the second user equipment according to the fourth idle time domain resource.
  • the fourth idle time domain resource may be any periodic idle time domain resource after the third idle time domain resource, and the fourth idle time domain resource is a number of periodic idle time domain resources specified within the maximum number of retransmissions Any of the free time domain resources of .
  • the first idle time domain resource information is determined according to a channel sensing result of the second user equipment.
  • the second user equipment may perform channel sensing within its communication range to obtain the first idle time domain resource information.
  • the communication range of the second user equipment may be the same as or different from the communication range of the first user equipment, so as to avoid the situation that the channel between the hidden user equipment and the hidden user equipment cannot be detected, resulting in a conflict of allocated access resources.
  • the first idle time domain resource information is determined according to a channel sensing result of the second user equipment and a channel sensing result of at least one third user equipment.
  • the first idle time domain resource information may further be determined according to the channel sensing result of the second user equipment and the channel sensing result of at least one third user equipment.
  • the at least one third user equipment is user equipment other than the first user equipment belonging to the network managed by the second user equipment.
  • At least one third user equipment can perform channel monitoring within its communication range, and the communication range of at least one third user equipment can be the same as or different from that of the first user equipment and the second user equipment, so that interception can be avoided.
  • the channel condition between the invisible user equipment and the hidden user equipment leads to the conflict of allocated access resources.
  • the method further includes: when the first user equipment searches for a synchronization signal broadcast by the second user equipment, performing channel sensing to obtain the second idle time domain resource information.
  • the first user equipment when the first user equipment is synchronized to the second user equipment, it performs channel sensing to obtain the second idle time domain resource information, and continuously updates the second idle time domain resource information during the access process, so as to Get accurate channel listening results.
  • a resource allocation method for D2D communication comprising: a second user equipment receives an access request from a first user equipment; the second user equipment sends an access request to the first user equipment Responding, the access response includes first idle time domain resource information, the first idle time domain resource information is used to indicate at least one current first idle time domain resource; and the second user equipment obtains from the first idle time domain resource
  • a user equipment receives a link establishment request message, where the link establishment request message is sent on a third idle time domain resource, where the third idle time domain resource is the at least one first idle time domain resource and the An idle time domain resource in an intersection set of the at least one second idle time domain resource, where the at least one second idle time domain resource is determined according to a channel sensing result of the first user equipment.
  • the second user equipment carries the first idle time domain resource information in the access response, so that the first user equipment can use the first idle time domain resource information of the second user equipment and the second idle time domain resource determined by itself.
  • the time-domain resource information can accurately determine the idle time-domain resource for sending the link establishment request message, reliably implement resource allocation for D2D communication, and avoid resource conflicts when multiple user equipments access at the same time.
  • the access response further includes a maximum number of retransmissions.
  • the method further includes: when the second user equipment fails to receive the link establishment request message, receiving the retransmitted link establishment request message from the first user equipment, The retransmitted link establishment request message is sent on a fourth idle time domain resource, and the fourth idle time domain resource is an intersection of at least one first idle time domain resource and the at least one second idle time domain resource Concentrated one free time domain resource.
  • the first idle time domain resource information is determined according to a current channel sensing result.
  • the method further includes: the second user equipment receiving a channel sensing result of at least one third user equipment; wherein the first idle time domain resource information is based on the current determined by the channel sensing result and the channel sensing result of the at least one third user equipment.
  • a resource allocation device for D2D communication may implement the method in the first aspect above.
  • the resource allocation device for D2D communication may be a chip or a terminal.
  • the above method can be realized by software, hardware, or by executing corresponding software by hardware.
  • the apparatus includes: a transceiving unit and a processing unit; wherein: the transceiving unit is configured to send an access request to the second user equipment; the transceiving unit is also configured to receive from the The second user equipment receives an access response, where the access response includes first idle time domain resource information of the second user equipment, where the first idle time domain resource information is used to indicate at least one first idle time domain resource ;
  • the processing unit is configured to determine a third idle time domain resource according to the first idle time domain resource information and the second idle time domain resource information, and the second idle time domain resource information includes the current channel sensing At least one second idle time domain resource determined as a result, the third idle time domain resource is an idle time domain in the intersection of the at least one first idle time domain resource and the at least one second idle time domain resource resource; and the transceiving unit is further configured to send a link establishment request message to the second user equipment according to the third idle time domain resource.
  • the access response also includes a maximum number of retransmissions.
  • the processing unit is further configured to: when the link establishment request message fails to be sent, according to the first idle time domain resource information, the second idle time domain resource information and the maximum number of retransmissions , determining a fourth idle time domain resource, where the fourth idle time domain resource is an idle time domain resource in the intersection of the at least one first idle time domain resource and the at least one second idle time domain resource; and
  • the transceiving unit is further configured to retransmit the link establishment request message to the second user equipment according to the fourth idle time domain resource.
  • the first idle time domain resource information is determined according to a channel sensing result of the second user equipment.
  • the first idle time domain resource information is determined according to the channel sensing result of the second user equipment and the channel sensing result of at least one third user equipment.
  • the processing unit is further configured to perform channel sensing to obtain the second idle time domain resource information when the synchronization signal broadcast by the second user equipment is found.
  • the device for allocating resources for D2D communication is used to execute the method in the above first aspect and various possible implementations thereof.
  • a resource allocation device for D2D communication may implement the method in the second aspect above.
  • the resource allocation device for D2D communication may be a chip or a terminal.
  • the above method can be realized by software, hardware, or by executing corresponding software by hardware.
  • the apparatus includes: a transceiver unit; wherein: the transceiver unit is configured to receive an access request from a first user equipment; the transceiver unit is also configured to send an access request to the first user equipment sending an access response, where the access response includes first idle time domain resource information, and the first idle time domain resource information is used to indicate at least one current first idle time domain resource; and the transceiver unit further uses For receiving a link establishment request message from the first user equipment, the link establishment request message is sent on a third idle time domain resource, where the third idle time domain resource is the at least one first idle time domain resource An idle time domain resource in an intersection of a time domain resource and the at least one second idle time domain resource, where the at least one second idle time domain resource is determined according to a channel sensing result of the first user equipment.
  • the access response also includes a maximum number of retransmissions.
  • the transceiver unit is further configured to receive a retransmitted link establishment request message from the first user equipment when the link establishment request message fails to be received, and the retransmitted link establishment request message sent on a fourth idle time domain resource, where the fourth idle time domain resource is an idle time domain resource in an intersection of at least one first idle time domain resource and the at least one second idle time domain resource.
  • the first idle time domain resource information is determined according to a current channel sensing result.
  • the transceiving unit is further configured to receive a channel sensing result of at least one third user equipment; wherein, the first idle time domain resource information is based on the current channel sensing result and the at least one determined by the channel sensing result of the third user equipment.
  • the device for allocating resources for D2D communication is used to execute the method in the above second aspect and various possible implementations thereof.
  • the resource allocation device for D2D communication in the above third aspect or the fourth aspect includes a processor coupled to a memory; the processor is configured to support the device to perform the above D2D communication The corresponding function in the resource allocation method.
  • the memory is used to couple with the processor, which holds the necessary computer programs (or computer-executable instructions) and/or data of the device.
  • the resource allocation device for D2D communication may further include a communication interface for supporting communication between the device and other network elements, such as sending or receiving data and/or signals.
  • the communication interface may be a transceiver, a circuit, a bus, a module or other types of communication interfaces.
  • the memory may be located inside the resource allocation device for D2D communication and integrated with the processor; it may also be located outside the resource allocation device for D2D communication.
  • the resource allocation device for D2D communication in the third aspect or the fourth aspect includes a processor and a transceiver device, the processor is coupled to the transceiver device, and the processor is configured to execute A computer program or instruction to control the transceiver device to receive and send information; when the processor executes the computer program or instruction, the processor is also used to implement the above method through a logic circuit or executing code instructions.
  • the transceiver device may be a transceiver, a transceiver circuit or an input-output interface, which is used to receive signals from resource allocation devices for D2D communication other than the resource allocation device for D2D communication and transmit them to the processor or Sending the signal from the processor to another resource allocation device for D2D communication other than the resource allocation device for D2D communication.
  • the resource allocation device for D2D communication is a chip
  • the transceiver device is a transceiver circuit or an input/output interface.
  • the sending unit may be an output unit, such as an output circuit or a communication interface; the receiving unit may be an input unit, such as an input circuit or a communication interface.
  • the sending unit may be a transmitter or a transmitter; the receiving unit may be a receiver or a receiver.
  • a communication system in the fifth aspect, includes a resource allocation device for implementing the D2D communication according to any one of the third aspect or the third aspect, and at least one resource allocation device according to the fourth aspect or the fourth aspect Any resource allocation device for implementing the D2D communication.
  • a sixth aspect provides a computer-readable storage medium, on which a computer program or instruction is stored, and when the program or instruction is executed by a processor, the method described in the first aspect or any one of the first aspect is implemented be executed, or to implement the method described in the second aspect or any one of the implementations of the second aspect is executed.
  • a computer program product which, when executed on a computing device, causes the method described in any one of the first aspect or the first aspect to be executed, or the method described in the second aspect or the second The method described in any implementation of the aspect is performed.
  • FIG. 1 is a schematic diagram of the flow of member devices accessing a centralized network
  • FIG. 2 is a schematic diagram of LTE V2X interception and resource reservation
  • FIG. 3 is a schematic diagram of a hidden user equipment
  • FIG. 4 is a schematic diagram of a communication system provided by an embodiment of the present application.
  • FIG. 5 is a schematic flowchart of a resource allocation method for D2D communication provided by an embodiment of the present application
  • FIG. 6 is a schematic flowchart of another D2D communication resource allocation method provided by an embodiment of the present application.
  • FIG. 7 is a schematic diagram of at least one first idle time domain resource indicated by the first idle time domain resource information in the example of the present application.
  • FIG. 8 is a schematic diagram of a third idle time domain resource and a fourth idle time domain resource determined by a first user equipment in an example of the present application;
  • FIG. 9 is a schematic structural diagram of a resource allocation device for D2D communication provided by an embodiment of the present application.
  • FIG. 10 is a schematic structural diagram of another apparatus for allocating resources for D2D communication provided by an embodiment of the present application.
  • FIG. 4 is a schematic structural diagram of a communication system provided by the present application
  • the communication system 4000 is located in a first network
  • the communication system 4000/first network includes a second user equipment (user equipment, UE) 401 and The first user equipment 402 .
  • the communication system 4000 may also include at least one third user equipment 403 (three third user equipments and the connection between the three third user equipments and the first user equipment and the second user equipment are illustrated by dashed lines in the figure, this
  • the application does not limit the number of third user equipment, which can be 0 or a positive integer).
  • the second user equipment 401 is the center of the first network and is responsible for establishing and managing the network, so it can also be called a management equipment.
  • Each central network has only one management device, but the management device can be changed.
  • the first user device 402 and at least one third user device 403 are synchronized to the second user device 401, they become member devices of the management device.
  • the first user equipment 402 needs to be synchronized with the second user equipment 401 and access the network before it can communicate with other member equipment.
  • a central network can have multiple member devices.
  • the second user equipment 401 is responsible for sending synchronous information in the first network, member device access management and device identification allocation, member list maintenance, communication resource allocation and recycling in the first network, message transfer in the first network, inter-network Identity conflict detection and update, etc.
  • the first user equipment 402 synchronizes with the management equipment, and after accessing the first network created by the management equipment, periodically sends its own status through heartbeat messages.
  • the first user equipment 402 may communicate with any member equipment in the first network, and may also select some member equipment to form a multicast group for communication.
  • the second user equipment 401, the first user equipment 402, and at least one third user equipment 403 may be D2D devices.
  • a D2D device may refer to a terminal in D2D communication.
  • the terminal is a node with wireless transceiver function, which can be deployed on land, including indoor or outdoor, handheld, wearable or vehicle-mounted; it can also be deployed on water, such as on ships, etc.; it can also be deployed in the air, such as aircraft, wireless Man-machines, balloons and satellites, etc.
  • D2D devices can be mobile phone, tablet computer (pad), computer with wireless transceiver function, terminal in vehicle to everything (V2X), virtual reality (virtual reality, VR) terminal equipment, augmented reality (augmented reality, AR) terminal equipment, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical, smart grid Wireless terminals in transportation safety, wireless terminals in smart city, wireless terminals in smart home, etc.
  • V2X virtual reality
  • VR virtual reality
  • AR augmented reality
  • wireless terminals in industrial control wireless terminals in self-driving
  • wireless terminals in remote medical smart grid Wireless terminals in transportation safety, wireless terminals in smart city, wireless terminals in smart home, etc.
  • a terminal may sometimes also be referred to as user equipment (user equipment, UE), access terminal equipment, UE unit, mobile station, mobile station, remote station, remote terminal equipment, mobile equipment, wireless communication equipment, UE proxy or UE device, etc.
  • this application provides a resource allocation scheme for D2D communication.
  • the second user equipment carries the first Idle time domain resource information, so that the first user equipment can accurately determine the idle time domain for sending the link establishment request message according to the first idle time domain resource information of the second user equipment and the second idle time domain resource information determined by itself Resources, to reliably implement resource allocation for D2D communication, and avoid resource conflicts when multiple user equipments access at the same time.
  • This solution can also be further applied to a cellular network.
  • the solution of this application can be used to solve the problem of access conflicts between multiple user equipments.
  • FIG. 5 it is a schematic flowchart of a resource allocation method for D2D communication provided by the embodiment of the present application, and the method may include the following steps:
  • the first user equipment sends an access request to the second user equipment.
  • the second user equipment receives the access request.
  • a user equipment For a network with a center, first select a user equipment as the management device, for example, select the second user equipment as the management device in this embodiment.
  • the management device provides the synchronization source.
  • the other user equipments perform synchronous discovery with the synchronization signal of the second user equipment as the target, and perform random access processing after the synchronous discovery is completed, forming a centered network. This embodiment is described by taking the first user equipment randomly accessing the centered network as an example.
  • the first user equipment When the first user equipment needs to join the centered network, it needs to first search for the synchronization signal broadcast by the second user equipment. After searching for the synchronization signal, the first user equipment sends an access request to the second user equipment.
  • the access request is used to request access to the network.
  • the access request may be called a random access request, a random access preamble, a preamble, message 1, and so on.
  • the second user equipment receives the access request.
  • multiple first user equipments may access the network at the same time.
  • the second user equipment receives the access requests of the multiple first user equipments.
  • the second user equipment sends an access response to the first user equipment.
  • the access response includes first idle time domain resource information.
  • the first user equipment receives the access response.
  • the second user equipment After receiving the access request sent by the first user equipment, the second user equipment sends an access response to the first user equipment.
  • the access response is a response to the above access request.
  • the access response may be called a random access response (random access response, RAR), message 2, and so on.
  • RAR random access response
  • the first user equipment receives the access response.
  • the access response includes first idle time domain resource information.
  • the first idle time domain resource information is determined according to the channel sensing result of the second user equipment.
  • the second user equipment monitors a current channel between at least one other user equipment within its communication range to obtain the first idle time domain resource information.
  • the first idle time domain resource information is used to indicate at least one current first idle time domain resource.
  • the at least one first idle time domain resource may be part or all of the idle time domain resources determined according to the channel sensing result of the second user equipment, for example, may be all idle time domain resources randomly selected by the second user equipment 10% of free time domain resources in resources.
  • the first user equipment determines a third idle time domain resource according to the first idle time domain resource information and the second idle time domain resource information.
  • the first user equipment After receiving the foregoing access response, the first user equipment obtains the first idle time domain resource information therein.
  • the first user equipment may perform channel sensing after searching for the synchronization signal.
  • the first user equipment monitors a current channel between at least one other user equipment within its communication range to obtain the second idle time domain resource information.
  • the second idle time domain resource information includes at least one second idle time domain resource determined according to the current channel sensing result.
  • the communication range of the first user equipment may be the same as or different from the communication range of the second user equipment. Assuming that user equipment 1 and user equipment 3 request access to user equipment 2 at the same time, user equipment 1 and user equipment 3 are far apart, and user equipment 1 and user equipment 3 cannot detect each other. User equipment 2 needs to allocate access resources to user equipment 1 and user equipment 3 .
  • user equipment 2 can intercept user equipment 1 and user equipment 3 .
  • the user equipment 1 not only determines the third idle time domain resource according to its own second idle time domain resource information, but also according to the received first credible time domain resource information of the user equipment 2, which expands the range of channel sensing.
  • the problem of access resource conflict caused by hidden user equipments is solved, therefore, resource allocation for D2D communication can be reliably realized, and resource conflicts when multiple user equipments access at the same time are avoided.
  • the first idle time domain resource information is used to indicate at least one current first idle time domain resource
  • the second idle time domain resource information includes at least one second idle time domain resource determined according to the current channel sensing result. Since the communication ranges of the first user equipment and the second user equipment for channel sensing may be the same or different, the obtained first idle time domain resource information and the second idle time domain resource information may be completely or partially identical, and at least one The second idle time domain resources may include the time domain resources for which the first user equipment detects that the channel is busy, and the first user equipment needs to exclude these time domain resources for which the channel is busy. Therefore, the first user equipment determines the third idle time domain resource according to the first idle time domain resource information and the second idle time domain resource information.
  • the third idle time domain resource is an idle time domain resource in the intersection of at least one first idle time domain resource and at least one second idle time domain resource.
  • the intersection may include at least one idle time domain resource.
  • the first user equipment may randomly select one idle time domain resource from the at least one idle time domain resource, or select one idle time domain resource according to a preset rule, to obtain the third idle time domain resource.
  • the first user equipment sends a link establishment request message to the second user equipment according to the third idle time domain resource.
  • the second user equipment receives a link establishment request message from the first user equipment.
  • the first user equipment may randomly select a frequency domain location, and send a link establishment request message on the third idle time domain resource and the frequency domain location.
  • the link establishment request message is used to request establishment of a link with the first network/second user equipment.
  • the link establishment request message may also be referred to as message 3 .
  • the second user equipment carries the first idle time domain resource information in the access response, so that the first user equipment can use the first idle time domain resource information of the second user equipment
  • the time-domain resource information and the second idle time-domain resource information determined by itself can accurately determine the idle time-domain resources for sending the link establishment request message, reliably realize the resource allocation of D2D communication, and avoid the error when multiple user equipments access at the same time. Resource conflict.
  • FIG. 6 it is a schematic flowchart of another D2D communication resource allocation method provided by the embodiment of the present application.
  • the method may include the following steps:
  • the first user equipment searches for a synchronization signal broadcast by the second user equipment, it performs channel sensing to obtain second idle time domain resource information.
  • a user equipment For a network with a center, first select a user equipment as the management device, for example, select the second user equipment as the management device in this embodiment.
  • the management device provides the synchronization source.
  • the other user equipments perform synchronous discovery with the synchronization signal of the second user equipment as the target, and perform random access processing after the synchronous discovery is completed, forming a centered network. This embodiment is described by taking the first user equipment randomly accessing the centered network as an example.
  • the first user equipment When the first user equipment needs to join the centered network, it needs to first search for the synchronization signal broadcast by the second user equipment. After the first user equipment searches for the synchronization signal, it becomes a member equipment of the network.
  • the first user equipment When the first user equipment searches for the synchronization signal broadcast by the second user equipment, it performs channel sensing to obtain the second idle time domain resource information.
  • the first user equipment monitors a channel between at least one other user equipment within its communication range to obtain the second idle time domain resource information.
  • the second idle time domain resource information includes at least one second idle time domain resource determined according to the current channel sensing result.
  • the first user equipment when the first user equipment searches for the synchronization signal broadcast by the second user equipment, it performs channel sensing on at least one time domain resource.
  • the unit of the time-domain resource may be a subframe, a time slot, a mini-slot, and the like.
  • a unit of time-domain resources is a subframe as an example for description.
  • the first user equipment may perform channel sensing in 0-10239 subframes.
  • the channel sensing result can be represented by a first resource bitmap.
  • the first resource bitmap may include 160 bits.
  • the first resource bitmap is initially all 0, indicating that all subframes are idle.
  • the first user equipment maintains the first resource bitmap in real time.
  • the first user equipment is listening, if it finds a received signal strength indication ( If the received signal strength indication (RSSI) is greater than or equal to the first threshold value, it is considered that the subframe r has been occupied, so the jth bit on the first resource bitmap is set as the first value.
  • RSSI received signal strength indication
  • % represents the remainder.
  • the time when the jth bit is set to the first value may also be recorded.
  • the first user equipment continues to perform channel sensing, and if the RSSI of all subbands on the subframe corresponding to the jth bit is less than or equal to the second threshold value for p consecutive times, set the jth bit to the second value .
  • the second threshold value is smaller than the first threshold value.
  • the initial values of the first threshold and the second threshold may be pre-configured by the second user equipment and notified to each member equipment.
  • the first threshold value and the second threshold value may also be factory-set.
  • the above-mentioned first value may be "1", which is used to indicate that the channel on the time domain resource is busy, and the corresponding second value may be "0", which is used to indicate that the channel on the time domain resource is idle.
  • the above-mentioned first value may be "0”, which is used to indicate that the channel on the time domain resource is busy, and the corresponding second value may be "1", which is used to indicate that the channel on the time domain resource is idle.
  • the initial value of the first resource bitmap (in hexadecimal notation): 0x000000000000000000000000000000000000.
  • the first resource bitmap is updated to: 0x000080000000000000000000000000000000 (that is, the 20th bit is "1").
  • the first resource bitmap is updated to: 0x0000000040000000000000000000000 (that is, the 20th Bit takes "0").
  • the second idle time domain resource information is a bitmap bit value whose value is the second value in the first resource bitmap.
  • the first resource bitmap is 0xFFFFFFFFFFFFFFFFFF01000800000000000000, that is, the channels on the subframes corresponding to bits 0 to 79, 87 and 100 are busy, and the subframes corresponding to the remaining bits (bits 80 to 86, 88 to 99, and 101 to 159) The channel on is idle.
  • the first user equipment sends an access request to the second user equipment.
  • the second user equipment receives the access request.
  • step S501 for the specific implementation of this step, reference may be made to step S501 in the foregoing embodiment, which will not be repeated here.
  • At least one third user equipment sends a channel sensing result to the second user equipment.
  • the second user equipment receives the channel sensing result of at least one third user equipment.
  • the second user equipment may also receive a channel sensing result of at least one third user equipment.
  • the at least one third user equipment may be a member equipment that has been connected to the network.
  • Each third user equipment may monitor channels between other user equipments within its communication range, and obtain respective channel monitoring results.
  • At least one third user equipment may respectively send respective channel sensing results to the second user equipment.
  • Each third user equipment may also maintain its own resource bitmap.
  • the channel sensing result may also be a bitmap bit value whose bit value in the resource bitmap is the second value.
  • the communication range of each third user equipment may be the same or different.
  • the communication ranges of at least one user equipment and the second user equipment may also be the same or different.
  • the distance between the user equipment 3 and the user equipment 4 is relatively long, and the user equipment 3 and the user equipment 4 cannot detect each other. Both the user equipment 3 and the user equipment 4 send their respective channel detection results to the user equipment 2 . Then the user equipment 2 can obtain the channel detection results of the user equipment 3 and the user equipment 4, which expands the range of channel detection.
  • the second user equipment sends an access response to the first user equipment.
  • the access response includes first idle time domain resource information.
  • the first idle time domain resource information is determined according to the current channel sensing result and the channel sensing result of at least one third user equipment.
  • the first idle time domain resource information is used to indicate at least one current first idle time domain resource.
  • the first user equipment receives the access response.
  • the first idle time domain resource information is determined according to the current channel sensing result and the channel sensing result of at least one third user equipment.
  • the at least one first idle time domain resource is an idle time domain resource after the second user equipment excludes conflicting time domain resources according to the current channel sensing result and the channel sensing result of the at least one third user equipment.
  • User equipment 2 needs to allocate access resources to user equipment 1 and user equipment 3 .
  • User equipment 2 listens to the channel between user equipment 1 within its communication range, and receives the channel monitoring result sent by user equipment 4 (user equipment 4 can monitor the channel between user equipment 3 within its communication range) .
  • the user equipment 2 can determine the first idle time-domain resource information according to the current channel sensing result and the channel sensing result of the user equipment 4, which expands the range of channel sensing.
  • the second user equipment may also maintain the second resource bitmap of the second user equipment with reference to the manner in which the first user equipment maintains the first resource bitmap in step S601 above.
  • the second user equipment determines the first idle time domain resource information according to the current channel sensing result and the channel sensing result of at least one third user equipment.
  • the access response includes first idle time domain resource information.
  • the above-mentioned first idle time domain resource information may be included in a media access control-control element (media access control-control element, MAC-CE) of the access response.
  • the MAC CE may include the following information elements: bitmap bit values (RES(1)-RES(n)) of at least one first idle time domain resource, and may also include a maximum number of retransmissions (MAX_RETX_NUM).
  • the format of the MAC CE is shown in Table 1 below:
  • FIG. 7 a schematic diagram of at least one first idle time domain resource indicated by the first idle time domain resource information in the example of the present application
  • the second user equipment sends an access response in the m#th subframe, and in the access response
  • the at least one first idle time domain resource included in the MAC CE is RES(1)-RES(n), and the maximum number of retransmissions is k, then the position of the corresponding at least one first idle time domain resource is: b+RES( 1), b+RES(2), Acrossb+RES(n), and the positions of idle time domain resources that can be selected during retransmission are: b+RES(1)+160*k, b+RES( 2)+160*k, whereasb+RES(n)+160*k.
  • k is a non-negative integer.
  • the value range of RES(1)-RES(n) is 0-159.
  • the maximum number of retransmissions indicates the maximum number of transmissions that can be used by the access resource sequence, including the total number of initial transmissions and retransmissions.
  • the second user equipment updates the second resource bitmap according to the current listening result to: 0xFFFFFFFFFFFFFFFF0000000000000000. It is assumed that the interception result of at least one third user equipment is the same as the second resource bitmap.
  • the second resource bitmap indicates that channels on subframes corresponding to bits 0 to 79 are occupied, and the second user equipment may randomly select 8 resources (RES(1) to RES(8) in the range of 80 to 159 bits )), respectively: 85, 87, 93, 100, 104, 116, 138, 152.
  • the position (unit is subframe) of at least one first idle time domain resource can be obtained as: 567, 573, 580, 584, 596, 618, 632, 727, 733, 740, 744, 756, 778, 792.
  • the first user equipment determines a third idle time domain resource according to the first idle time domain resource information and the second idle time domain resource information.
  • the second idle time domain resource information includes at least one second idle time domain resource determined according to the current channel sensing result.
  • the third idle time domain resource is an idle time domain resource in the intersection of at least one first idle time domain resource and at least one second idle time domain resource.
  • step S503 For the specific implementation of this step, reference may be made to step S503 in the foregoing embodiment.
  • the first user equipment receives an access response from the second user equipment in the mth subframe.
  • the access response includes RES(1)-RES(n), and the maximum number of retransmissions k.
  • the position of at least one first idle time domain resource analyzed by the first user equipment is: b+RES(1), b+RES(2), acrossb+RES(n), and the optional idle time domain resources during retransmission
  • the positions of the time domain resources are: b+RES(1)+160*k, b+RES(2)+160*k, ... b+RES(n)+160*k.
  • RES(1) ⁇ RES(8) are: 85, 87, 93, 100, 104, 116, 138, 152 respectively.
  • the resource bitmap updated by the first user equipment according to its own interception result is: 0xFFFFFFFFFFFFFFFF01000800000000000000, wherein the values of the 87th bit and the 100th bit are 1, therefore, it is necessary to exclude the 87th bit and the 100th bit to obtain the second
  • the first user equipment sends a link establishment request message to the second user equipment according to the third idle time domain resource.
  • the second user equipment receives a link establishment request message from the first user equipment.
  • step S504 For a specific implementation of this step, reference may be made to step S504 in the foregoing embodiment.
  • the first user equipment may randomly select a frequency domain location, assuming it is the 8th subband, then the first user equipment sends a link establishment request message on subframe 596# and the 8th subband.
  • the first user equipment determines a fourth idle time domain resource according to the first idle time domain resource information, the second idle time domain resource information, and the maximum number of retransmissions.
  • the first user equipment may further determine the fourth idle time domain resource according to the first idle time domain resource information, the second idle time domain resource information and the maximum number of retransmissions.
  • the fourth idle time domain resource is an idle time domain resource in an intersection of at least one first idle time domain resource and at least one second idle time domain resource.
  • the fourth idle time domain resource is any idle time domain resource in the next period after the third idle time domain resource; for the kth retransmission, and so on.
  • the fourth idle time domain resource may be b+RES(1)+160*k, b+RES(2)+160*k, ... b+RES(n)+160*
  • the fourth idle time domain resource cannot exceed b+RES(n)+160*k.
  • the fourth idle time domain resource can be b+RES(1)+160*k, or b+RES(2)+160*k, . ... any idle time domain resource in b+RES(n)+160*k, which is not limited in this application.
  • the first user equipment senses that the time domain resources corresponding to b+RES(1)+160*k are occupied, selects b+RES(n)+160*k, and selects b+RES(n)+160*k.
  • the frequency domain position for retransmitting the link establishment request message is randomly selected, and the link establishment request message is retransmitted at the selected time domain position and frequency domain position.
  • the selected third free time domain resource is 116, and the corresponding time domain position is 596, then the time domain positions corresponding to the fourth free time domain resource may be 725, 727, 733, 740, 756, Any idle time-domain resource location in 778, 792.
  • the first user equipment retransmits the link establishment request message to the second user equipment according to the fourth idle time domain resource.
  • the second user equipment receives the retransmitted link establishment request message.
  • the first user equipment After the first user equipment determines the fourth idle time domain resource, it retransmits the link establishment request message to the second user equipment on the fourth idle time domain resource, which can improve the reliability of transmission of the link establishment request message.
  • steps S607 and S608 can be executed repeatedly, and the number of retransmissions is not greater than the above maximum number of retransmissions minus 1.
  • the second user equipment carries the first idle time domain resource information in the access response, so that the first user equipment can use the first idle time domain resource information of the second user equipment
  • the time-domain resource information and the second idle time-domain resource information determined by itself can accurately determine the idle time-domain resources for sending the link establishment request message, reliably realize the resource allocation of D2D communication, and avoid the error when multiple user equipments access at the same time. resource conflict;
  • the access response also includes a maximum number of retransmissions, and the first user equipment can retransmit the link establishment request message on idle time domain resources specified within the maximum number of retransmissions, which improves the reliability of D2D communication;
  • the second user equipment may determine the first idle time domain resource information according to the channel sensing result of the second user equipment and the channel sensing result of at least one third user equipment, which improves the accuracy of the first idle time domain resource information and improves the accuracy of the first idle time domain resource information. reliability of resource allocation.
  • the first user equipment or the second user equipment includes a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer.
  • the hardware layer includes hardware such as a central processing unit (CPU), a memory management unit (MMU), and memory (also called main memory).
  • the operating system may be any one or more computer operating systems that implement business processing through processes, for example, Linux operating system, Unix operating system, Android operating system, iOS operating system, or windows operating system.
  • the application layer includes applications such as browsers, address books, word processing software, and instant messaging software.
  • the embodiment of the present application does not specifically limit the specific structure of the execution subject of the method provided by the embodiment of the present application, as long as the program that records the code of the method provided by the embodiment of the present application can be run to provide the method according to the embodiment of the present application.
  • the execution body of the method provided by the embodiment of the present application may be a terminal, or a functional module in the first user equipment or the second user equipment that can call a program and execute the program.
  • the relevant functions of the first user equipment or the second user equipment in the embodiments of the present application may be realized by one device, or jointly realized by multiple devices, or may be realized by one or more functional modules in one device , which is not specifically limited in this embodiment of the present application.
  • the above functions can be network elements in hardware devices, software functions running on dedicated hardware, or a combination of hardware and software, or instantiated on a platform (for example, a cloud platform) virtualization capabilities.
  • the first user equipment or the second user equipment includes hardware structures and/or software modules corresponding to each function.
  • the present application can be implemented in the form of hardware or a combination of hardware and computer software with reference to the units and method steps of the examples described in the embodiments disclosed in the present application. Whether a certain function is executed by hardware or computer software drives the hardware depends on the specific application scenario and design constraints of the technical solution.
  • FIG. 9 and FIG. 10 are schematic structural diagrams of a possible resource allocation device for D2D communication provided by an embodiment of the present application.
  • the resource allocation device for D2D communication may also be a communication device. These resource allocation devices for D2D communication can be used to realize the functions of the first user equipment or the second user equipment in the above method embodiments, and thus can also realize the beneficial effects of the above method embodiments.
  • the resource allocation device for D2D communication may be the first user equipment or the second user equipment, or may be a module (such as a chip) applied to the first user equipment or the second user equipment.
  • a resource allocation device 900 for D2D communication includes a processing unit 910 and a transceiver unit 920 .
  • the resource allocation apparatus 900 for D2D communication is configured to implement the functions of the first user equipment or the second user equipment in the method embodiments shown in FIG. 5 and FIG. 6 above.
  • the transceiving unit 920 is used to send an access request to the second user equipment;
  • the transceiving unit 920 is further configured to receive an access response from the second user equipment, where the access response includes first idle time domain resource information of the second user equipment, and the first idle time domain resource information It is used to indicate at least one first idle time domain resource;
  • the processing unit 910 is configured to determine a third idle time domain resource according to the first idle time domain resource information and the second idle time domain resource information, the first idle time domain resource
  • the second idle time domain resource information includes at least one second idle time domain resource determined according to the current channel sensing result, and the third idle time domain resource is the at least one first idle time domain resource and the at least one second idle time domain resource.
  • An idle time domain resource in the intersection of idle time domain resources; and the transceiving unit 920 is further configured to send a link establishment request message to the second user equipment according to the
  • the access response also includes a maximum number of retransmissions.
  • the processing unit 910 is further configured to: when the link establishment request message fails to be sent, according to the first idle time domain resource information, the second idle time domain resource information and the maximum retransmission times, determining a fourth idle time domain resource, where the fourth idle time domain resource is an idle time domain resource in the intersection of the at least one first idle time domain resource and the at least one second idle time domain resource; And the transceiving unit 920 is further configured to retransmit the link establishment request message to the second user equipment according to the fourth idle time domain resource.
  • the first idle time domain resource information is determined according to a channel sensing result of the second user equipment.
  • the first idle time domain resource information is determined according to a channel sensing result of the second user equipment and a channel sensing result of at least one third user equipment.
  • the processing unit 910 is further configured to perform channel sensing to obtain the second idle time domain resource information when the synchronization signal broadcast by the second user equipment is found.
  • the transceiving unit 920 is configured to receive an access request from the first user equipment; The transceiving unit 920 is further configured to send an access response to the first user equipment, where the access response includes first idle time domain resource information, and the first idle time domain resource information is used to indicate at least one current The first idle time domain resource; and the transceiving unit 920 is further configured to receive a link establishment request message from the first user equipment, where the link establishment request message is sent on the third idle time domain resource, wherein, The third idle time domain resource is an idle time domain resource in the intersection of the at least one first idle time domain resource and the at least one second idle time domain resource, and the at least one second idle time domain resource is determined according to the channel sensing result of the first user equipment.
  • the access response also includes a maximum number of retransmissions.
  • the transceiving unit 920 is further configured to receive a retransmitted link establishment request message from the first user equipment when the link establishment request message fails to be received, and the retransmitted link establishment request message The message is sent on a fourth idle time domain resource, where the fourth idle time domain resource is an idle time domain resource in an intersection of at least one first idle time domain resource and the at least one second idle time domain resource.
  • the first idle time domain resource information is determined according to a current channel sensing result.
  • the transceiving unit 920 is further configured to receive a channel sensing result of at least one third user equipment; wherein, the first idle time domain resource information is based on the current channel sensing result and the at least determined by a channel sensing result of a third user equipment.
  • processing unit 910 and the transceiver unit 920 can be directly obtained by referring to the relevant descriptions in the method embodiments shown in FIG. 5 and FIG. 6 , and will not be repeated here.
  • a resource allocation device 1000 for D2D communication includes a processor 1010 and an interface circuit 1020 .
  • the processor 1010 and the interface circuit 1020 are coupled to each other.
  • the interface circuit 1020 may be a transceiver or an input-output interface.
  • the resource allocation apparatus 1000 for D2D communication may further include a memory 1030 for storing instructions executed by the processor 1010 or storing input data required by the processor 1010 to execute the instructions or storing data generated by the processor 1010 after executing the instructions.
  • the chip When the resource allocation device for D2D communication is a chip applied to the first user equipment/second user equipment, the chip implements the functions of the first user equipment/second user equipment in the above method embodiments.
  • the chip receives information from other modules (such as radio frequency modules or antennas) in the first user equipment/second user equipment, and the information is sent to the first user equipment/second user equipment by other user equipment; or, the chip Sending information to other modules (such as radio frequency modules or antennas) in the first user equipment/second user equipment, the information is sent by the first user equipment/second user equipment to other user equipment.
  • processor in the embodiments of the present application may be a central processing unit (central processing unit, CPU), and may also be other general processors, digital signal processors (digital signal processor, DSP), application specific integrated circuits (application specific integrated circuit, ASIC), field programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof.
  • CPU central processing unit
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • a general-purpose processor can be a microprocessor, or any conventional processor.
  • the method steps in the embodiments of the present application may be implemented by means of hardware, or may be implemented by means of a processor executing software instructions.
  • Software instructions can be composed of corresponding software modules, and software modules can be stored in random access memory, flash memory, read-only memory, programmable read-only memory, erasable programmable read-only memory, electrically erasable programmable read-only Memory, registers, hard disk, removable hard disk, compact disc read-only memory (CD-ROM) or any other form of storage medium known in the art.
  • An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium.
  • the storage medium may also be a component of the processor.
  • the processor and storage medium can be located in the ASIC.
  • the ASIC can be located in the base station or the terminal.
  • the processor and the storage medium may also exist in the base station or the terminal as discrete components.
  • all or part of them may be implemented by software, hardware, firmware or any combination thereof.
  • software When implemented using software, it may be implemented in whole or in part in the form of a computer program product.
  • the computer program product comprises one or more computer programs or instructions. When the computer program or instructions are loaded and executed on the computer, the processes or functions described in the embodiments of the present application are executed in whole or in part.
  • the computer may be a general purpose computer, a special purpose computer, a computer network, a base station, user equipment or other programmable devices.
  • the computer program or instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer program or instructions may be downloaded from a website, computer, A server or data center transmits to another website site, computer, server or data center by wired or wireless means.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer, or a data storage device such as a server or a data center integrating one or more available media.
  • the available medium may be a magnetic medium, such as a floppy disk, a hard disk, or a magnetic tape; it may also be an optical medium, such as a digital video disk; or it may be a semiconductor medium, such as a solid state disk.
  • “at least one” means one or more, and “multiple” means two or more.
  • “And/or” describes the association relationship of associated objects, indicating that there may be three types of relationships, for example, A and/or B, which can mean: A exists alone, A and B exist at the same time, and B exists alone, where A, B can be singular or plural.
  • the character “/” generally indicates that the contextual objects are an “or” relationship; in the formulas of this application, the character “/” indicates that the contextual objects are a "division” Relationship.

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
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Abstract

Sont divulgués dans la présente demande un procédé et un appareil d'attribution de ressources pour communication D2D, et un support et un produit de programme. Le procédé comprend les étapes suivantes : un premier équipement utilisateur envoie une requête d'accès à un second équipement utilisateur, et reçoit une réponse d'accès en provenance du second équipement utilisateur, la réponse d'accès comprenant de premières informations de ressource de domaine temporel inactive du second équipement utilisateur ; la détermination d'une troisième ressource de domaine temporel inactive en fonction des premières informations de ressource de domaine temporel inactive et de secondes informations de ressource de domaine temporel inactive, les secondes informations de ressource de domaine temporel inactive comprenant au moins une deuxième ressource de domaine temporel inactive, qui est déterminée en fonction du résultat de surveillance de canal actuel ; et l'envoi d'un message de requête d'établissement de liaison au second équipement utilisateur selon la troisième ressource de domaine temporel inactive. Selon de premières informations de ressource de domaine temporel inactive d'un second équipement utilisateur et de secondes informations de ressource de domaine temporel inactive qui sont déterminées par un premier équipement utilisateur lui-même, le premier équipement utilisateur peut déterminer avec précision une ressource de domaine temporel inactive pour envoyer un message de requête d'établissement de liaison, et peut réaliser de manière fiable une attribution de ressources pour une communication D2D, ce qui permet d'éviter un conflit de ressources pendant l'accès simultané d'une pluralité d'équipements utilisateurs.
PCT/CN2022/135930 2021-12-31 2022-12-01 Procédé et appareil d'attribution de ressources pour communication d2d, et support et produit de programme WO2023124753A1 (fr)

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CN110636614A (zh) * 2018-06-21 2019-12-31 维沃移动通信有限公司 一种随机接入方法、终端及网络设备
CN110913487A (zh) * 2019-11-20 2020-03-24 京信通信系统（中国）有限公司 资源分配方法、装置、基站和存储介质
CN111345087A (zh) * 2017-11-17 2020-06-26 Oppo广东移动通信有限公司 资源确定方法、装置、网元及系统
CN112584515A (zh) * 2019-09-30 2021-03-30 华为技术有限公司 确定随机接入资源的方法及装置
WO2021056583A1 (fr) * 2019-09-29 2021-04-01 华为技术有限公司 Procédé et appareil de transmission en liaison montante

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CN108738027A (zh) * 2017-04-25 2018-11-02 华为技术有限公司 一种网络处理方法、资源管理系统及网络设备
CN111345087A (zh) * 2017-11-17 2020-06-26 Oppo广东移动通信有限公司 资源确定方法、装置、网元及系统
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