WO2022077227A1 - Procédé et appareil de communication de liaison latérale, et support de stockage - Google Patents

Procédé et appareil de communication de liaison latérale, et support de stockage Download PDF

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Publication number
WO2022077227A1
WO2022077227A1 PCT/CN2020/120670 CN2020120670W WO2022077227A1 WO 2022077227 A1 WO2022077227 A1 WO 2022077227A1 CN 2020120670 W CN2020120670 W CN 2020120670W WO 2022077227 A1 WO2022077227 A1 WO 2022077227A1
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Prior art keywords
resource
specified
resource selection
time
direct connection
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PCT/CN2020/120670
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English (en)
Chinese (zh)
Inventor
赵群
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北京小米移动软件有限公司
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Priority to CN202080002810.4A priority Critical patent/CN112385291B/zh
Priority to PCT/CN2020/120670 priority patent/WO2022077227A1/fr
Publication of WO2022077227A1 publication Critical patent/WO2022077227A1/fr

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    • 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
    • H04W72/53—Allocation or scheduling criteria for wireless resources based on regulatory allocation policies
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/14—Direct-mode setup
    • 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the terminal when the terminal transmits data through direct communication, based on the consideration of energy saving, the terminal may randomly select sidelink resources for data transmission, or monitor some sidelink resources to select appropriate sidelink resources for data transmission.
  • the present disclosure provides a direct connection communication method, device and storage medium.
  • the technical solution is as follows:
  • a direct connection communication method is provided, the method is performed by a user equipment, and the method includes:
  • the sidelink resource restriction information is used to restrict the direct connection communication process associated with the direct connection communication resource selection.
  • a direct connection communication apparatus the apparatus is used in user equipment, and the apparatus includes:
  • the restriction information acquisition module is used to acquire the resource restriction information of the direct communication sidelink
  • a communication module used for sidelink direct communication based on the sidelink resource restriction information
  • the sidelink resource restriction information is used to restrict the direct connection communication process associated with the direct connection communication resource selection.
  • a direct connection communication apparatus the apparatus is used in user equipment, and the apparatus includes:
  • processor is configured to:
  • the sidelink resource restriction information is used to restrict the direct connection communication process associated with the direct connection communication resource selection.
  • a computer-readable storage medium contains executable instructions, and a processor in a user equipment invokes the executable instructions to implement the above-mentioned direct connection communication method.
  • a computer program product or computer program comprising computer instructions stored in a computer-readable storage medium.
  • the processor of the computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device executes the above-mentioned direct-connect communication method.
  • the user equipment corresponds to information used to limit the direct connection communication process associated with the selection of direct connection communication resources.
  • the direct connection communication process is restricted by the above information.
  • the designated resource selection method such as random resource selection method or partial monitoring method
  • it can reduce the resource collision or interference when the user equipment uses the designated resource selection method, thereby improving the system performance in the sidelink transmission scenario.
  • FIG. 1 is a schematic diagram of an implementation environment involved in a direct connection communication method according to an exemplary embodiment
  • FIG. 2 is a flowchart of a direct-connection communication method according to an exemplary embodiment
  • FIG. 3 is a flowchart of a direct-connection communication method according to an exemplary embodiment
  • FIG. 4 is a schematic diagram of resource selection and reservation involved in the embodiment shown in FIG. 3;
  • FIG. 5 is a block diagram of a direct-connected communication device according to an exemplary embodiment
  • Fig. 6 is a schematic structural diagram of a user equipment according to an exemplary embodiment.
  • Vehicle networking communication is one of the applications that the development of cellular wireless communication networks needs to support.
  • Vehicle networking communication V2x includes V2V, V2I and V2P.
  • V2V in-vehicle devices
  • V2I roadside devices
  • V2P in-vehicle devices and handheld devices
  • the Internet of Vehicles can effectively improve traffic safety, improve traffic efficiency and enrich people's travel experience.
  • Using existing cellular communication technologies to support IoV communication can effectively utilize existing base station deployment, reduce equipment overhead, and be more conducive to providing services with QoS guarantees to meet the needs of IoV services. Therefore, in LTE Rel-14/15, cellular network support for vehicle networking V2x communication is provided, namely C-V2x (cellular based V2x).
  • the communication between in-vehicle equipment and other equipment can be relayed through the base station and the core network, that is, the communication link between the terminal equipment and the base station in the original cellular network is used for communication (UL/DL communication); Communication (sidelink communication) can be carried out directly through the direct link between the devices.
  • sidelink communication Compared with Uu interface communication, sidelink communication has the characteristics of short delay and low overhead, and is very suitable for direct communication between in-vehicle devices and other peripheral devices that are geographically close.
  • V2x sidelink communication in LTE can only support some basic security V2x applications, such as the exchange of basic security information (BSM–Basic Safety Message) such as CAM (Cooperative Awareness Messages) or DENM (Decentralized Environmental Notification Message), and voice broadcast communication Wait.
  • BSM–Basic Safety Message basic security information
  • CAM Cooperative Awareness Messages
  • DENM Decentralized Environmental Notification Message
  • voice broadcast communication Wait With the recent development of technologies such as autonomous driving, in order to support new V2x services, new requirements have been put forward for the performance of V2x technology.
  • 5G NR New Radio
  • the 3GPP SA1 Service Requirement
  • the 3GPP SA1 Service Requirement working group has established some new business requirements for V2x communication, including fleet management (Vehicles Platooning), extended perception (Extended Sensors), advanced driving (Advanced Driving), and remote driving (remote driving) ).
  • fleet management Vehicle Platooning
  • extended perception Extended Sensors
  • Advanced Driving Advanced Driving
  • remote driving remote driving
  • NR V2x sidelink needs to provide higher communication rate, shorter communication delay, and more reliable communication quality.
  • the current 5G V2x technology mainly considers the communication between in-vehicle terminals, and there is not much consideration for the requirements of terminal forms such as handheld terminals, such as power saving.
  • Both LTE V2x and 5G V2x rely on the monitoring of user terminals to reduce interference between adjacent user terminals, that is, user terminals that avoid mutual interference select the same time and frequency resources for direct transmission.
  • the user terminal needs to continuously monitor the resource reservation information of other user equipments in the listening window before resource selection, and perform corresponding measurement operations. According to the resource reservation information and the measurement value, the time when the expected interference is large is removed from the resource selection window. and select the time-frequency resource used for the final direct connection transmission from the remaining time-frequency resources.
  • LTE V2x the energy-saving user equipment is supported to use the random selection method for resource selection.
  • the user equipment does not need to monitor, and completely relies on the randomness of resource selection to avoid collision; it also supports the partial monitoring method.
  • the user equipment may only listen for part of the time unit to reduce energy consumption. Both of these two methods may cause the user equipment to be unable to monitor all resource reservation information, and the cost of reducing energy consumption is to increase the probability of resource collision.
  • NR Sidelink needs to consider the optimization of energy consumption by reducing user listening time. The reduction of the listening time will also cause the energy-saving user equipment to fail to monitor part of the time-frequency resource reservation information of other user equipments, resulting in problems such as increased resource collisions and increased interference.
  • LTE V2x only handheld terminals are considered for energy saving. Compared with vehicle-mounted terminals, only data transmission is required, and the density of user equipment is relatively low, and the data flow is small.
  • PS and business scenarios are also involved. Therefore, resource collision or interference occurs when the terminal uses sidelink, which will have a greater impact on system performance.
  • the various embodiments involved in the present disclosure show restrictions on the process of selecting sidelink resources and performing sidelink transmission using a specified resource selection method (such as the above-mentioned random resource selection method or partial monitoring method based on energy saving considerations), so as to reduce sidelink resources. Collision or interference, a solution to improve system performance in sidelink transmission scenarios.
  • a specified resource selection method such as the above-mentioned random resource selection method or partial monitoring method based on energy saving considerations
  • FIG. 1 is a schematic diagram of an implementation environment involved in a direct connection communication method according to some exemplary embodiments. As shown in FIG. 1 , the implementation environment may include several user equipments 110 and base stations 120 .
  • the user equipment 110 is a wireless communication device that supports multiple radio access technologies for sidelink transmission.
  • the user equipment 110 may support cellular mobile communication technology, for example, may support the 5th generation mobile communication technology (the 5th generation mobile communication, 5G) technology.
  • the user equipment 110 may also support a next-generation mobile communication technology of 5G technology.
  • the user equipment 110 may be an in-vehicle communication device, for example, a trip computer with a wireless communication function, or a wireless communication device connected to an external trip computer.
  • the user equipment 110 may also be a roadside device, for example, may be a street light, a signal light or other roadside device with a wireless communication function.
  • user equipment 110 may also be a user terminal device, such as a mobile phone (or "cellular" phone) and a computer with a mobile terminal, for example, may be portable, pocket-sized, hand-held, computer-built, or vehicle-mounted mobile device.
  • a station Station, STA
  • subscriber unit subscriber unit
  • subscriber station subscriber station
  • mobile station mobile station
  • mobile station mobile
  • remote station remote station
  • an access point a remote terminal
  • access terminal access terminal
  • user device user terminal
  • user agent user agent
  • user equipment user device
  • user equipment user equipment
  • UE user equipment
  • the user equipment 110 may be a mobile terminal such as a smartphone, a tablet computer, and an e-book reader, or may be a smart wearable device such as a smart glasses, a smart watch, or a smart bracelet.
  • the base station 120 may be a network-side device in a wireless communication system.
  • the wireless communication system may also be a 5G system, also known as a new air interface NR system.
  • the wireless communication system may also be a next-generation system of the 5G system.
  • the base station 120 may be a base station (gNB) that adopts a centralized distributed architecture in a 5G system.
  • gNB base station
  • the base station 120 adopts a centralized distributed architecture it usually includes a centralized unit (central unit, CU) and at least two distributed units (distributed unit, DU).
  • the centralized unit is provided with a protocol stack of a Packet Data Convergence Protocol (PDCP) layer, a Radio Link Control Protocol (Radio Link Control, RLC) layer, and a Media Access Control (Media Access Control, MAC) layer; distribution A physical (Physical, PHY) layer protocol stack is set in the unit, and the specific implementation manner of the base station 120 is not limited in this embodiment of the present disclosure.
  • PDCP Packet Data Convergence Protocol
  • RLC Radio Link Control Protocol
  • MAC Media Access Control
  • a wireless connection can be established between the base station 120 and the user equipment 110 through a wireless air interface.
  • the wireless air interface is a wireless air interface based on the fifth generation mobile communication network technology (5G) standard, for example, the wireless air interface is a new air interface; or, the wireless air interface can also be a wireless air interface based on a next-generation mobile communication network technology standard based on 5G .
  • 5G fifth generation mobile communication network technology
  • the above wireless communication system may further include a network management device 130 .
  • the network management device 130 may be a core network device in a wireless communication system, for example, the network management device 130 may be a mobility management entity (Mobility Management Entity) in an evolved packet core network (Evolved Packet Core, EPC). MME). Alternatively, the network management device may also be other core network devices, such as a serving gateway (Serving GateWay, SGW), a public data network gateway (Public Data Network GateWay, PGW), a policy and charging rules functional unit (Policy and Charging Rules) Function, PCRF) or home subscriber server (Home Subscriber Server, HSS), etc.
  • the implementation form of the network management device 130 is not limited in this embodiment of the present disclosure.
  • FIG. 2 is a flow chart of a direct-connection communication method according to an exemplary embodiment.
  • the direct-connection communication method may be executed by a user equipment.
  • the user equipment may be the user equipment in the implementation environment shown in FIG. 1 . 110.
  • the method may include the following steps.
  • step 201 the direct connection communication sidelink resource limitation information is obtained.
  • step 202 sidelink direct communication is performed based on the sidelink resource restriction information.
  • the sidelink resource restriction information is used to restrict the direct connection communication process associated with the direct connection communication resource selection.
  • the direct-connection communication process associated with the direct-connection communication resource selection is restricted, including at least one of the following restrictions:
  • the sidelink resource limitation information is for the specified direct connection transmission priority or the specified direct connection transmission priority range; or,
  • the sidelink resource limit information is for the specified direct connection transport type; or,
  • the sidelink resource restriction information is for the specified direct communication user equipment type.
  • the resource restriction information when restricting the direct connection communication process associated with the selection of the direct connection communication resource, including restricting the process of determining the direct connection communication resource selection method, includes a selection method indication information;
  • the selection mode indication information indicates that direct connection resource selection is allowed through the specified resource selection mode or indicates that direct connection resource selection is not allowed through the specified resource selection mode.
  • the selection manner indication information is preconfigured in the user equipment
  • the selection mode indication information is obtained by receiving downlink control signaling sent by the network side device.
  • the resource restriction information when restricting the direct connection communication process associated with the direct connection communication resource selection, including restricting the resource selection process using the specified resource selection method, includes corresponding to The specified condition of the specified resource selection method; the sidelink direct communication based on the sidelink resource restriction information, including:
  • Direct communication through the selected direct communication resource is
  • the specified condition includes that the time interval indicated by the measurement information is greater than a given time interval threshold, and the measurement information obtained by measuring includes:
  • the measurement information is obtained by measuring the resource selection time interval; the resource selection time interval is adjacent in time, and the specified resource selection mode is used to perform the interval between time points corresponding to the resource selection operation.
  • the specified condition includes that the resource selection frequency indicated by the measurement information does not exceed a given frequency threshold, and the measurement information is obtained through measurement, including:
  • the measurement information is obtained by measuring the resource selection frequency; the resource selection frequency is used to indicate the number of times the resource is selected by the specified resource selection method within the specified time interval.
  • the time interval threshold or the frequency threshold is preconfigured in the user equipment
  • the time interval threshold or the frequency threshold is obtained by receiving downlink control signaling sent by the network side device.
  • the specified condition includes that the amount of time-frequency resources indicated by the measurement information does not exceed a given threshold of the amount of time-frequency resources, and the measurement information obtained by measuring includes:
  • the measurement information is obtained through the time-frequency resource size selected by the specified resource selection method.
  • the measurement information is obtained by measuring the time-frequency resource size selected by the specified resource selection manner, including:
  • the available resource amount is the resource amount of the time-frequency resources that can be selected by the user equipment for direct connection communication within the specified time domain interval
  • the obtaining of the first resource amount of the time-frequency resources selected by the specified resource selection method within the specified time domain interval includes:
  • the amount of time-frequency resources selected by the specified resource selection method is determined as the number of the time-frequency resources selected by the specified resource selection method. an amount of resources; or,
  • All the time-frequency resource quantities selected by the specified resource selection method are determined as the first resource quantities of the time-frequency resources selected by the specified resource selection method.
  • the obtaining of the first resource amount of the time-frequency resources selected by the specified resource selection method within the specified time domain interval includes:
  • the amount of time-frequency resources for periodic reservation selected by the specified resource selection method is determined as the first resource amount of time-frequency resources selected by the specified resource selection method.
  • the time-frequency resource threshold is preconfigured in the user equipment
  • the time-frequency resource amount threshold is obtained by receiving downlink control signaling sent by the network side device.
  • the method further includes:
  • the direct connection communication transmission is performed without using the resource selected by the specified resource selection method.
  • the restriction information includes the transmission parameter range restriction information corresponding to the specified resource selection mode, and the transmission parameter range restriction information includes the transmission power, the modulation and coding strategy MCS value, the size of the occupied frequency resources, the number of repeated transmissions, and whether to support mixing The value range of at least one parameter in the automatic retransmission request HARQ feedback;
  • direct connection communication transmission is performed on the sidelink resource selected by the specified resource selection method.
  • the transmission parameter range limitation information corresponding to the specified resource selection manner is preconfigured in the user equipment
  • the transmission parameter range limitation information corresponding to the specified resource selection mode is obtained by receiving downlink control signaling sent by the network side device.
  • the specified resource selection manner includes: randomly selecting a sidelink resource, and at least one of monitoring and selecting a sidelink resource in a partial time domain.
  • the user equipment corresponds to information used to limit the direct connection communication process associated with the selection of direct connection communication resources.
  • the information restricts the direct connection communication process.
  • the user terminal supports a resource selection method that has energy saving effect and will cause resource collision or increased interference (such as random resource selection method or partial monitoring method), it can reduce the user equipment using the specified resource selection method. Resource collision or interference, thereby improving system performance in sidelink transmission scenarios.
  • FIG. 3 is a flowchart showing a direct connection communication method according to an exemplary embodiment.
  • the direct connection communication method may be executed by a user equipment, for example, the user equipment may be the user equipment in the implementation environment shown in FIG. 1 . 110. As shown in Figure 3, the method may include the following steps.
  • step 301 the direct connection communication sidelink resource limitation information is obtained.
  • the sidelink resource restriction information is used to restrict the direct connection communication process associated with the selection of the direct connection communication resource.
  • the above-mentioned direct connection communication process includes at least one of determining a direct connection communication resource selection method, performing resource selection using a specified resource selection method, and performing direct connection transmission using a resource selected by the specified resource selection method.
  • the user equipment when there is a first sidelink data block that needs to be sent through the sidelink in the user equipment, the user equipment can acquire the above-mentioned sidelink resource restriction information.
  • Step 305 For the steps of restricting the process of direct connection communication based on the transmission parameter range restriction information specifying the resource selection mode, please refer to the subsequent step 306.
  • step 302 when the resource restriction information includes selection mode indication information, and the selection mode indication information indicates that direct connection resource selection is allowed by the specified resource selection mode, the direct connection communication resource is selected by the specified resource selection mode.
  • the resource restriction information when restricting the direct connection communication process associated with the selection of direct connection communication resources, including restricting the process of determining the direct connection communication resource selection mode, includes selection mode indication information.
  • the selection mode indication information indicates that direct connection resource selection is allowed through the specified resource selection mode or direct connection resource selection is not allowed through the specified resource selection mode.
  • the selection mode indication information is pre-configured in the user equipment; for example, the above resource selection mode configuration information is specified by a protocol, for example, the protocol specifies that a specified type of user equipment is allowed to use a specified resource Selection mode, or, the protocol specifies that data blocks of a specified type of service are allowed to use a specified resource selection mode.
  • the selection mode indication information is obtained by receiving downlink control signaling sent by the network side device.
  • the user equipment for the user equipment that has both the wireless transmission capability and the wireless reception capability, it can be allowed or not allowed to use the specified resource selection method through the configuration/pre-configuration method.
  • the specified resource selection methods here include energy-saving optimized resource selection methods such as random resource selection and partial monitoring resource selection methods, and may also include other resource selection methods.
  • the network side device may use user equipment-based downlink control signaling, user group-based downlink control signaling, or cell-based downlink control signaling to configure information about the resource selection mode of the user equipment to configure.
  • the user equipment when the user equipment is configured to allow the selection of time-frequency resources for direct connection communication by using the specified resource selection method, if there is a data block that needs to be sent by direct connection communication, the user equipment can use the above specified resource selection method. Choose a resource.
  • the solution shown in the above step 302 is to limit whether the user equipment is allowed to use the authority of the specified resource selection mode, so as to avoid causing a greater impact on the system.
  • Step 303 when the resource limitation information includes a specified condition corresponding to a specified resource selection mode, obtain measurement information through measurement.
  • the resource restriction information when the direct connection communication process associated with the direct connection communication resource selection is restricted, including the restriction on the process of resource selection using a specified resource selection method, the resource restriction information includes a resource corresponding to the specified resource selection method. Specifies the criteria for how the resource is selected.
  • the above specified conditions include that the time interval/frequency of use indicated by the measurement information is greater than a given time interval threshold (that is, to limit the frequency of use using the specified resource selection method), and that the amount of time-frequency resources indicated by the measurement information does not exceed the given time interval threshold
  • the time-frequency resource amount threshold that is, to limit the amount of resources selected using the specified resource selection method
  • the above-mentioned acquisition of measurement information through measurement includes:
  • the measurement information is obtained by measuring the resource selection time interval; the resource selection time interval is adjacent in time, and the specified resource selection method is used to perform the measurement.
  • the resource selection time interval can be obtained to obtain measurement information, and the resource selection time interval is the time point corresponding to the current time point and the first resource selection operation
  • the first resource selection operation is a sidelink resource selection operation before the current time point; when the resource selection time interval is greater than the time interval threshold, it is determined that the measurement information satisfies the specified condition.
  • the first resource selection operation is to use the specified resource selection method for the second sidelink data block.
  • the second sidelink data block is a data block that selects a sidelink resource by specifying a resource selection method before the first sidelink data block.
  • the user equipment may limit the time interval between two consecutive data blocks that use the specified resource selection method to select resources. For example, when the user equipment selects a resource for a data block A using the specified resource selection method , when the next data block B that needs to be transmitted through the sidelink arrives, the user equipment first determines the current time point and the time point at which resources are selected for the data block A (due to the possibility of repeated transmission of the data block A, the time point here can be The time point when the resource is selected for the data block A by the specified resource selection method for the first time, or the time point when the resource is selected for the data block A by the specified resource selection method for the last time, or the i-th time when the resource is selected by the specified resource selection method.
  • the time point at which data block A selects resources, i is a preset integer value) whether the interval between them reaches the threshold, and if so, it is determined that the measurement information satisfies the specified conditions, and the specified resource selection method is used to select resources for data block B subsequently. Avoid using the specified resource selection method for all sidelink data blocks, thereby limiting the frequency of using the specified resource selection method.
  • the first resource selection operation is the previous resource selection operation for the first sidelink data block through the specified resource selection method.
  • a sidelink data block may need to be repeatedly transmitted, so resource selection needs to be repeated.
  • the user equipment may limit the time interval for resource selection between two adjacent repeated transmissions of the same data block. For example, after the user equipment selects a resource for a data block A using the specified resource selection method and sends it, if the data block A needs to be repeatedly sent, the user equipment first determines the current time point and the last time the resource was selected for the data block A. Whether the interval between points reaches the threshold, and if so, it is determined that the measurement information meets the specified conditions, and the specified resource selection method is used to reselect resources for data block A, which can avoid using the specified resources for all repeated transmission processes of the same data block. Selection method, thereby limiting the frequency of use of the specified resource selection method.
  • the time interval threshold is preconfigured in the user equipment
  • the time interval threshold is obtained by receiving downlink control signaling sent by the network side device.
  • the above-mentioned acquisition of measurement information through measurement includes:
  • the measurement information is obtained by measuring the resource selection frequency; the resource selection frequency is used to indicate the resource selection method within the specified time interval. frequency.
  • the frequency threshold is obtained by receiving downlink control signaling sent by the network side device.
  • the maximum number of times that a specified resource selection method can be used for resource selection within a given time unit may be configured through pre-configuration or downlink signaling of the base station.
  • the above-mentioned acquisition of measurement information through measurement includes:
  • the user equipment may further limit the data transmission size of the time-frequency resource selected by using the specified resource selection method.
  • the data transmission size of the time-frequency resources selected by using the specified resource selection method may be an absolute resource size, that is, the amount of resources; or, the data transmission size of the time-frequency resources selected by using the specified resource selection method may also be Absolute resource size, eg, percentage of resource volume.
  • the measurement information is obtained by measuring the time-frequency resource size selected by the specified resource selection manner, including:
  • the first resource amount of the time-frequency resources selected by the specified resource selection method within the specified time domain interval Obtain the first resource amount of the time-frequency resources selected by the specified resource selection method within the specified time domain interval; obtain the ratio between the first resource amount and the available resource amount, and the available resource amount is in the specified time domain interval. , the resource amount of the time-frequency resource that the user equipment can select for direct connection communication; obtain the measurement information including the ratio.
  • the time-frequency resource threshold is preconfigured in the user equipment
  • the time-frequency resource amount threshold is obtained by receiving downlink control signaling sent by the network side device.
  • the user equipment may count the time-frequency resources selected by the specified resource selection method within a period of time, accounting for the proportion of the time-frequency resources available for direct connection transmission of the user equipment in all resource pools.
  • the ratio cannot exceed a predetermined threshold.
  • the predetermined threshold may be determined by pre-configuration or downlink signaling configuration of the base station.
  • the above-mentioned “resource selection” includes selection of time-frequency resources for new direct connection transmission, and also includes re-selection of time-frequency resources originally selected.
  • the originally selected time-frequency resource cannot accommodate the current data block, or the originally selected time-frequency resource is occupied by other users with a higher priority.
  • the obtaining of the first resource amount of the time-frequency resources selected by the specified resource selection method within the specified time domain interval includes:
  • Mode 1 Statistics are selected by the specified resource selection mode and used for the time-frequency resources used for the initial transmission of a directly connected data block.
  • time-frequency resources used for the initial transmission of the direct-connected data block are not reserved, other monitoring-based user equipment cannot avoid it, which has the greatest impact on the system performance. Therefore, the time-frequency resources used for the initial transmission of the directly-connected data block can be counted.
  • Mode 3 Counting the time-frequency resources selected by the resource selection mode and used or reserved by the user equipment for direct transmission.
  • Manner 4 Count all the time-frequency resources selected by the resource selection mode, regardless of whether they are used or reserved by the user equipment for direct transmission.
  • This method can avoid the impact on other direct connection transmissions to the greatest extent.
  • FIG. 4 shows a schematic diagram of resource selection and reservation in a process of transmitting a sidelink data block involved in an embodiment of the present application.
  • the user equipment selects five resources: resource 1, resource 2, resource 3, resource 4 and resource 5, which are used for the transmission and repeated transmission of one data block;
  • the direct connection control information transmitted at the same time as the data transmission can perform resource reservation for two future retransmissions, that is, when the user equipment uses resource 1 for direct connection transmission, resource reservation can be performed for resource 2 and resource 3 at the same time.
  • the user equipment stops retransmission that is, only resource 1 and resource 2 are actually used, and resources 3, 4, and 5 are not used for retransmission. transmission.
  • resource 1 needs to be counted; according to method 2, resource 1 and resource 2 need to be counted; according to method 3, resource 1, resource 2, resource 3, and resource 4 need to be counted; and according to method 4, resource 1 to 5 all need to be counted.
  • the amount of time-frequency resources for periodic reservation selected by the specified resource selection method is determined as the first resource amount of time-frequency resources selected by the specified resource selection method.
  • the above-mentioned time length may be obtained through pre-configuration or downlink signaling configuration of the base station.
  • Mode C Count the time-frequency resources in all periods. In this way, the impact of resource selection can be maximized.
  • the above measurement information may also indicate the number of times of transmission failures after the resources are selected by using the specified resource selection method within a specified time period before the current time point.
  • the above specified condition is that the number of transmission failures indicated by the measurement information is less than the number of times threshold.
  • the above-mentioned number of sending failures may be the number of consecutively selected resources using the specified resource selection method and failed to send within the specified time period, or may be the total number of times the specified resource selection method was used within the specified time period to select resources and failed to send.
  • the above-mentioned failure to send the resource after selecting the resource by using the specified resource selection method includes that after the resource is selected and sent by using the specified resource selection method, a receiving success response fed back by the receiving end is not received.
  • the user equipment when the number of times of sending failures after the user equipment selects resources by using the specified resource selection method reaches or exceeds the number of times threshold, it may be because the collision probability when the specified resource selection method is used for transmission is high, or the selected The interference on the resources is relatively large. In this case, the user equipment may not use the designated resource selection method, thereby limiting the frequency of use of the designated resource selection method.
  • Step 304 when the measurement information satisfies the specified condition, use the specified resource selection method to select the direct connection communication resource.
  • the user equipment when there is a data block that needs to be sent through direct connection communication in the user equipment, and the measurement information obtained by the user equipment through measurement satisfies the specified conditions, the user equipment can select the direct connection data block by specifying the resource. Choose a resource.
  • the user equipment may perform one of the following operations:
  • the user equipment needs to use other resource selection methods to select resources, or delay or abandon data transmission.
  • step 306 when the sidelink resource restriction information includes transmission parameter range restriction information corresponding to the specified resource selection mode, based on the transmission parameter range restriction information, the direct connection communication transmission is performed on the sidelink resource selected by the specified resource selection mode. For example, the user equipment must transmit the direct connection communication on the sidelink resource selected by the specified resource selection method according to the transmission parameter range.
  • the transmission parameter range limitation information corresponding to the specified resource selection mode is obtained by receiving downlink control signaling sent by the network side device.
  • the sidelink resource limitation information is for a specified direct connection transmission priority or a specified direct connection transmission priority range.
  • the directly connected data with a specified priority or a specified priority range can use a specified resource selection manner for resource selection. For example, only when the priority of the data to be transmitted that triggers resource selection or reselection is higher than a certain priority threshold, the random resource selection method can be used; or, use an 8-bit bitmap to directly connect data priority. Configure whether to allow random resource selection from 1 to 8.
  • the random resource selection method is limited by the specified conditions; or, using an 8-bit bitmap pair
  • the direct data priority ranges from 1 to 8 to configure whether the random resource selection method is restricted by the specified conditions.
  • the so-called restricted by the specified condition refers to determining whether to use the specified resource selection method to select the direct connection communication resource or not to use the specified resource selection method to select the direct connection communication resource based on whether the specified condition is satisfied.
  • only the directly connected data with a specified priority or a specified priority range may be limited by the specified conditions and/or the range of transmission parameters when the specified resource selection method is used for resource selection.
  • the random resource selection method is limited by the specified conditions and/or the range of transmission parameters; or, using An 8-bit bitmap configures whether the direct connection data priority from 1 to 8 is limited by the specified conditions and/or the range of transmission parameters when using the random resource selection method.
  • the sidelink resource limitation information is for a specified direct connection transmission type.
  • the above for the specified direct connection transmission type means that the sidelink resource restriction information is configured/indicated based on the specified direct connection transmission type.
  • the above-mentioned direct connection transmission types may include unicast, multicast, and broadcast, and may also include unicast with HARQ feedback, multicast using Type1 HARQ feedback, multicast using Type2 HARQ feedback, and unicast or group without HARQ feedback. broadcast and so on.
  • the sidelink resource limitation information is for a specified direct-connection communication user equipment type.
  • the user equipment of the specified direct communication user equipment type can use the specified resource selection method.
  • the handheld device can use the random resource selection method for resource selection, but the vehicle-mounted device is limited to not use the random resource selection method to perform resource selection.
  • the handheld device when restricted to use the random resource selection method for resource selection, it is not restricted by the specified conditions and/or the range of transmission parameters; while the vehicle-mounted device is restricted to use the random resource selection method for resource selection, it is subject to the specified conditions and/or transmission parameters. scope limit.
  • the restriction methods shown in steps 302 and 305, steps 303 to 305, and step 306 may be used alone, or the above three restriction methods may also be used in combination of two or three.
  • the user terminal can determine whether the measurement information satisfies the specified condition in step 303, and after determining that the measurement information satisfies the specified condition, select the direct connection communication resource in step 304, and go through step 304.
  • the restriction method shown in 306 restricts the range of parameter values used for sending the data block on the selected resource.
  • FIG. 5 is a block diagram of a direct-connected communication apparatus according to an exemplary embodiment.
  • the direct-connected communication apparatus can be used in the user equipment 110 in the implementation environment shown in FIG. 2 or the steps performed by the user equipment in the embodiment shown in FIG. 3 .
  • the direct communication device may include:
  • a restriction information acquisition module 501 used for acquiring direct communication sidelink resource restriction information
  • the communication module 502 is configured to perform sidelink direct connection communication based on the sidelink resource limitation information.
  • the sidelink resource restriction information is used to restrict the direct connection communication process associated with the direct connection communication resource selection.
  • the restriction on the direct connection communication process associated with the selection of the direct connection communication resource includes at least one of the following restrictions:
  • the sidelink resource limitation information is for a specified direct connection transmission priority or a specified direct connection transmission priority range; or,
  • the sidelink resource restriction information is for the specified direct connection transmission type; or,
  • the sidelink resource restriction information is for a specified type of direct communication user equipment.
  • the restriction on the direct connection communication process associated with the selection of the direct connection communication resource includes restriction on the process of determining the selection method of the direct connection communication resource
  • the resource restriction information includes selection method instructions
  • the selection mode indication information indicates whether direct connection resource selection is allowed through the specified resource selection mode or direct connection resource selection is not allowed through the specified resource selection mode.
  • the selection manner indication information is preconfigured in the user equipment
  • the selection mode indication information is obtained by receiving downlink control signaling sent by the network side device.
  • the restriction on the direct connection communication process associated with the selection of the direct connection communication resource includes restriction on the process of performing resource selection by using the specified resource selection method, the resource restriction information Including the specified condition corresponding to the specified resource selection mode; the communication module is used for,
  • Direct communication through the selected direct communication resource is
  • the specified condition includes that the time interval indicated by the measurement information is greater than a given time interval threshold; when the measurement information is acquired through measurement, the communication module is configured to:
  • the measurement information is obtained by measuring resource selection time intervals; the resource selection time intervals are adjacent in time, and the specified resource selection mode is used to perform the interval between time points corresponding to the resource selection operation.
  • the specified condition includes that the resource selection frequency indicated by the measurement information does not exceed a given frequency threshold; when the measurement information is obtained by measurement, the communication module is configured to obtain by measuring the resource selection frequency The measurement information; the resource selection frequency is used to indicate the number of times the resource is selected by the specified resource selection method within the specified time interval.
  • the time interval threshold or the frequency threshold is obtained by receiving downlink control signaling sent by the network side device.
  • the specified condition includes that the amount of time-frequency resources indicated by the measurement information does not exceed a given threshold of the amount of time-frequency resources; when the measurement information is obtained through measurement, the communication module is configured to: ,
  • the measurement information is obtained through the time-frequency resource size selected by the specified resource selection method.
  • the communication module is used to:
  • the available resource amount is the resource amount of the time-frequency resources that can be selected by the user equipment for direct connection communication within the specified time domain interval ;
  • the measurement information including the ratio is obtained.
  • the communication module is used to:
  • All the time-frequency resource quantities selected by the specified resource selection method are determined as the first resource quantities of the time-frequency resources selected by the specified resource selection method.
  • the communication module is used to:
  • the amount of time-frequency resources that are periodically reserved and selected by the specified resource selection method is determined as the first resource amount of time-frequency resources selected by the specified resource selection method.
  • the time-frequency resource amount threshold is preconfigured in the user equipment
  • the time-frequency resource amount threshold is obtained by receiving downlink control signaling sent by the network side device.
  • the communication module is further configured to: when the resource selection information does not meet the specified condition,
  • the direct connection communication transmission is performed without using the resource selected by the specified resource selection method.
  • the sidelink resource restriction information includes transmission parameter range restriction information corresponding to the specified resource selection mode, and the transmission parameter range restriction information includes transmission power, modulation and coding strategy MCS value, occupied frequency resource size, repeatability The value range of at least one parameter in the number of transmissions and whether the HARQ feedback of HARQ is supported;
  • the communication module is configured to perform direct connection communication transmission on the sidelink resource selected by the specified resource selection method based on the transmission parameter range limitation information.
  • the transmission parameter range limitation information corresponding to the specified resource selection manner is pre-configured in the user equipment
  • the transmission parameter range limitation information corresponding to the specified resource selection mode is obtained by receiving downlink control signaling sent by the network side device.
  • the specified resource selection manner includes: randomly selecting sidelink resources, and at least one of monitoring and selecting sidelink resources in a partial time domain.
  • the user equipment corresponds to information used to limit the direct connection communication process associated with the selection of direct connection communication resources.
  • the information restricts the direct connection communication process.
  • the user terminal supports a resource selection method that has energy saving effect and will cause resource collision or increased interference (such as random resource selection method or partial monitoring method), it can reduce the user equipment using the specified resource selection method. Resource collision or interference, thereby improving system performance in sidelink transmission scenarios.
  • An exemplary embodiment of the present disclosure also provides a direct connection communication system, the system includes: at least two user equipments and a base station.
  • the user equipment includes the direct communication device provided in the embodiment shown in FIG. 4 above.
  • the device provided in the above embodiment realizes its functions, only the division of the above functional modules is used as an example for illustration. In practical applications, the above functions can be allocated to different functional modules according to actual needs. That is, the content structure of the device is divided into different functional modules to complete all or part of the functions described above.
  • An exemplary embodiment of the present disclosure provides a direct-connected communication apparatus capable of implementing all or part of the steps performed by the user equipment in the above-mentioned embodiment shown in FIG. 2 or FIG. 3 of the present disclosure.
  • the direct-connected communication apparatus includes: a processor , memory for storing processor executable instructions;
  • processor is configured as:
  • the sidelink resource restriction information is used to restrict the direct connection communication process associated with the direct connection communication resource selection.
  • the user equipment includes corresponding hardware structures and/or software modules for executing each function.
  • the embodiments of the present disclosure can be implemented in hardware or a combination of hardware and computer software. Whether a function is performed by hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the technical solutions of the embodiments of the present disclosure.
  • Fig. 6 is a schematic structural diagram of a user equipment according to an exemplary embodiment.
  • the user equipment may be implemented as the user equipment in the system environment shown in FIG. 1 , and may execute the above method or all or part of the steps performed by the user equipment in the embodiment shown in FIG. 2 or FIG. 3 .
  • User equipment 600 includes a communication unit 604 and a processor 602 .
  • the processor 602 may also be a controller, which is represented as “controller/processor 602” in FIG. 6 .
  • the communication unit 604 is used to support the user equipment to communicate with other network entities (eg, other user equipments or base stations, etc.).
  • the user equipment 600 may further include a memory 603 for storing program codes and data of the user equipment 600 .
  • FIG. 6 only shows a simplified design of the user equipment 600 .
  • the user equipment 600 may include any number of processors, controllers, memories, communication units, etc., and all user equipments that can implement the embodiments of the present disclosure fall within the protection scope of the embodiments of the present disclosure.
  • Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another.
  • a storage medium can be any available medium that can be accessed by a general purpose or special purpose computer.
  • Embodiments of the present disclosure also provide a computer storage medium for storing computer software instructions for the user equipment, including a program designed for executing the direct communication method.
  • a computer program product or computer program comprising computer instructions stored in a computer readable storage medium.
  • the processor of the computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device executes the methods shown in the foregoing embodiments.

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  • Mobile Radio Communication Systems (AREA)

Abstract

La présente divulgation se rapporte au domaine technique des communications sans fil et concerne un procédé et un appareil de communication de liaison latérale ainsi qu'un support de stockage. Le procédé consiste à : acquérir des informations de limitation de ressource de liaison latérale ; et réaliser une communication de liaison latérale sur la base des informations de limitation de ressource de liaison latérale, les informations de limitation de ressource de liaison latérale étant utilisées pour limiter un processus de communication de liaison latérale associé à une sélection de ressource de communication de liaison latérale. Lorsqu'un terminal prend en charge un mode de sélection de ressources spécifié ayant un effet d'économie d'énergie et provoquant une augmentation de collision ou d'interférence de ressources, au moyen de la solution ci-dessus, une collision ou une interférence de ressources lorsque l'équipement utilisateur utilise le mode de sélection de ressources spécifié peut être réduite, ce qui permet d'améliorer les performances du système dans un scénario de transmission de liaison latérale.
PCT/CN2020/120670 2020-10-13 2020-10-13 Procédé et appareil de communication de liaison latérale, et support de stockage WO2022077227A1 (fr)

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