WO2023004635A1 - Procédé de sélection de ressources et dispositif terminal - Google Patents

Procédé de sélection de ressources et dispositif terminal Download PDF

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Publication number
WO2023004635A1
WO2023004635A1 PCT/CN2021/108989 CN2021108989W WO2023004635A1 WO 2023004635 A1 WO2023004635 A1 WO 2023004635A1 CN 2021108989 W CN2021108989 W CN 2021108989W WO 2023004635 A1 WO2023004635 A1 WO 2023004635A1
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WIPO (PCT)
Prior art keywords
resource
resources
selection window
terminal device
candidate
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PCT/CN2021/108989
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English (en)
Chinese (zh)
Inventor
马腾
赵振山
张世昌
林晖闵
丁伊
Original Assignee
Oppo广东移动通信有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Oppo广东移动通信有限公司 filed Critical Oppo广东移动通信有限公司
Priority to PCT/CN2021/108989 priority Critical patent/WO2023004635A1/fr
Priority to CN202180097885.XA priority patent/CN117242861A/zh
Publication of WO2023004635A1 publication Critical patent/WO2023004635A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30—Services specially adapted for particular environments, situations or purposes
    • H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

Definitions

  • the embodiment of the present application relates to the communication field, and more specifically, relates to a resource selection method and a terminal device.
  • the terminal device supports a multi-carrier-based resource selection mechanism, and the multi-carrier-based resource selection mechanism may include a random selection-based resource selection mechanism, For the resource selection mechanism of random selection, the terminal device first uses all the resources in the resource selection window as a set of candidate resources, and then randomly selects them according to equal probability, and finally the upper layer informs the physical layer of the selected resources, and the terminal device uses these resources Sidelink (SL) transmission is performed.
  • LTE Long Term Evolution, LTE
  • V2X Vehicle to Everything
  • data transmission based on a single carrier is a typical data transmission method of a terminal device, and a resource selection mechanism based on random selection for multiple carriers is not suitable for a single carrier.
  • a resource selection mechanism based on random selection for multiple carriers is not suitable for a single carrier.
  • the randomly selected resource selection mechanism when resources need to be frequently selected to send data, not only will a large number of sending resources be occupied/reserved, but also the probability of resource collisions will be increased, which will reduce system performance.
  • Embodiments of the present application provide a resource selection method and a terminal device, which are not only applicable to a single carrier, but also can reduce resource collision probability, thereby improving reliability of a random selection mechanism and system performance.
  • the present application provides a wireless communication method, including:
  • the first resource includes resources allocated and/or reserved by the terminal device for other information
  • a random selection method is used to select resources of the target data.
  • the present application provides a terminal device configured to execute the method in the foregoing first aspect or its various implementation manners.
  • the terminal device includes a functional module configured to execute the method in the foregoing first aspect or its various implementation manners.
  • the terminal device may include a processing unit configured to perform functions related to information processing.
  • the processing unit may be a processor.
  • the terminal device may include a sending unit and/or a receiving unit.
  • the sending unit is used to perform functions related to sending, and the receiving unit is used to perform functions related to receiving.
  • the sending unit may be a transmitter or transmitter, and the receiving unit may be a receiver or receiver.
  • the terminal device is a communication chip, the sending unit may be an input circuit or interface of the communication chip, and the sending unit may be an output circuit or interface of the communication chip.
  • the present application provides a terminal device, including a processor and a memory.
  • the memory is used to store a computer program
  • the processor is used to call and run the computer program stored in the memory, so as to execute the method in the above first aspect or each implementation manner thereof.
  • processors there are one or more processors, and one or more memories.
  • the memory may be integrated with the processor, or the memory may be separated from the processor.
  • the terminal device further includes a transmitter (transmitter) and a receiver (receiver).
  • the present application provides a chip configured to implement the method in the above-mentioned first aspect or various implementation manners thereof.
  • the chip includes: a processor, configured to invoke and run a computer program from a memory, so that a device installed with the chip executes the method in the above first aspect or its various implementations.
  • the present application provides a computer-readable storage medium for storing a computer program, and the computer program causes a computer to execute the method in the above-mentioned first aspect or various implementations thereof.
  • the present application provides a computer program product, including computer program instructions, where the computer program instructions cause a computer to execute the method in the above first aspect or various implementations thereof.
  • the present application provides a computer program, which, when run on a computer, causes the computer to execute the method in the above first aspect or its implementations.
  • the terminal device may exclude the resources in the resource selection window based on the first resource allocated and/or reserved by the terminal device for other information, to obtain a set of candidate resources; further, in the candidate resources
  • the resources of the target data are selected randomly in the collection. It is not only applicable to a single carrier, but also reduces the collision probability of randomly selected resources by adding a resource exclusion link to exclude the conflicting first resource, thereby improving the reliability of the random selection mechanism and system performance.
  • Figures 1 to 6 are examples of scenarios provided by the embodiments of the present application.
  • Fig. 7 is a schematic diagram of resource selection based on interception provided by an embodiment of the present application.
  • Fig. 8 is a schematic flowchart of a wireless communication method provided by the present application.
  • Figure 9 and Figure 10 are examples of the first resource provided by the embodiment of the present application.
  • FIG. 11 is a schematic block diagram of a terminal device provided by an embodiment of the present application.
  • Fig. 12 is a schematic block diagram of a communication device provided by an embodiment of the present application.
  • Fig. 13 is a schematic block diagram of a chip provided by an embodiment of the present application.
  • the embodiments of the present application may be applicable to any terminal device-to-terminal device communication framework.
  • V2V Vehicle to Vehicle
  • V2X Vehicle to Everything
  • D2D Device to Device
  • the terminal device in this application may be any device or device configured with a physical layer and a media access control layer, and the terminal device may also be called an access terminal.
  • user equipment User Equipment, UE
  • subscriber unit subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device.
  • the access terminal can be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a wireless Handheld devices with communication capabilities, computing devices or other linear processing devices connected to wireless modems, in-vehicle devices, wearable devices, etc.
  • SIP Session Initiation Protocol
  • WLL Wireless Local Loop
  • PDA Personal Digital Assistant
  • the embodiment of the present invention is described by taking a vehicle-mounted terminal as an example, but it is not limited thereto.
  • the technical solution of the embodiment of the present application can be applied to various communication systems, such as: Global System of Mobile communication (Global System of Mobile communication, GSM) system, code division multiple access (Code Division Multiple Access, CDMA) system, broadband code division multiple access (Wideband Code Division Multiple Access, WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, Advanced long term evolution (LTE-A) system , New Radio (NR) system, evolution system of NR system, LTE (LTE-based access to unlicensed spectrum, LTE-U) system on unlicensed spectrum, NR (NR-based access to unlicensed spectrum) on unlicensed spectrum unlicensed spectrum (NR-U) system, Non-Terrestrial Networks (NTN) system, Universal Mobile Telecommunications System (UMTS), Wireless Local Area Networks (WLAN), Wireless Fidelity (Wireless Fidelity, WiFi), fifth-generation communication (5th-Generation, 5G) system or other communication systems, etc.
  • GSM Global System of Mobile
  • D2D Device to Device
  • M2M Machine to Machine
  • MTC Machine Type Communication
  • V2V Vehicle to Vehicle
  • V2X Vehicle to everything
  • the communication system of the present application may be applied to a carrier aggregation (Carrier Aggregation, CA) scenario, may also be applied to a dual connectivity (Dual Connectivity, DC) scenario, and may also be applied to an independent (Standalone, SA) network deployment scenario.
  • Carrier Aggregation, CA Carrier Aggregation
  • DC Dual Connectivity
  • SA independent network deployment scenario
  • the communication system of the present application can be applied to unlicensed spectrum, wherein the unlicensed spectrum can also be considered as shared spectrum; or, the communication system of the present application can also be applied to licensed spectrum, wherein the licensed spectrum can also be considered as unlicensed spectrum Shared spectrum.
  • the embodiments of the present application describe various embodiments in conjunction with network equipment and terminal equipment, wherein the terminal equipment may also be referred to as user equipment (User Equipment, UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device, etc.
  • user equipment User Equipment, UE
  • access terminal user unit
  • user station mobile station
  • mobile station mobile station
  • remote station remote terminal
  • mobile device user terminal
  • terminal wireless communication device
  • wireless communication device user agent or user device
  • the terminal device can be a station (STATION, ST) in a WLAN, a cellular phone, a cordless phone, a Session Initiation Protocol (Session Initiation Protocol, SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, a personal digital assistant (Personal Digital Assistant, PDA) devices, handheld devices with wireless communication functions, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices, next-generation communication systems such as terminal devices in NR networks, or future Terminal equipment in the evolved public land mobile network (Public Land Mobile Network, PLMN) network, etc.
  • PLMN Public Land Mobile Network
  • terminal equipment can be deployed on land, including indoor or outdoor, handheld, wearable or vehicle-mounted; it can also be deployed on water (such as ships, etc.); it can also be deployed in the air (such as on aircraft, balloons and satellites, etc.) .
  • the terminal device can be a mobile phone (Mobile Phone), a tablet computer (Pad), a computer with wireless transceiver function, a virtual reality (Virtual Reality, VR) terminal device, an augmented reality (Augmented Reality, AR) terminal device, an industrial Wireless terminal equipment in industrial control, wireless terminal equipment in self-driving, wireless terminal equipment in remote medical, wireless terminal equipment in smart grid, transportation Wireless terminal devices in transportation safety, wireless terminal devices in smart city or wireless terminal devices in smart home, etc.
  • a virtual reality (Virtual Reality, VR) terminal device an augmented reality (Augmented Reality, AR) terminal device
  • an industrial Wireless terminal equipment in industrial control wireless terminal equipment in self-driving
  • wireless terminal equipment in remote medical wireless terminal equipment in smart grid
  • transportation Wireless terminal devices in transportation safety wireless terminal devices in smart city or wireless terminal devices in smart home, etc.
  • the terminal device may also be a wearable device.
  • Wearable devices can also be called wearable smart devices, which is a general term for the application of wearable technology to intelligently design daily wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes.
  • a wearable device is a portable device that is worn directly on the body or integrated into the user's clothing or accessories. Wearable devices are not only a hardware device, but also achieve powerful functions through software support, data interaction, and cloud interaction.
  • Generalized wearable smart devices include full-featured, large-sized, complete or partial functions without relying on smart phones, such as smart watches or smart glasses, etc., and only focus on a certain type of application functions, and need to cooperate with other devices such as smart phones Use, such as various smart bracelets and smart jewelry for physical sign monitoring.
  • the network device can be a device used to communicate with the mobile device, and the network device can be an access point (Access Point, AP) in WLAN, a base station (Base Transceiver Station, BTS) in GSM or CDMA, or It is a base station (NodeB, NB) in WCDMA, or an evolved base station (Evolutional Node B, eNB or eNodeB) in LTE, or a relay station or access point, or a network in a vehicle-mounted device, a wearable device, and an NR network Equipment or a base station (gNB) or network equipment in a future evolved PLMN network or network equipment in an NTN network.
  • Access Point Access Point
  • BTS Base Transceiver Station
  • NodeB, NB base station
  • Evolutional Node B, eNB or eNodeB evolved base station
  • gNB NR network Equipment or a base station
  • the network device may have a mobile feature, for example, the network device may be a mobile device.
  • the network equipment may be a satellite or a balloon station.
  • the satellite can be a low earth orbit (low earth orbit, LEO) satellite, a medium earth orbit (medium earth orbit, MEO) satellite, a geosynchronous earth orbit (geosynchronous earth orbit, GEO) satellite, a high elliptical orbit (High Elliptical Orbit, HEO) satellite.
  • the second device may also be a base station set up on land, in a water area, or other locations.
  • a network device may provide services for a cell, and a terminal device communicates with the network device through the transmission resources (for example, frequency domain resources, or spectrum resources) used by the cell, and the cell may be a network device (such as a base station)
  • the corresponding cell, the cell can belong to the macro base station, or the base station corresponding to the small cell (Small cell), where the small cell can include: Metro cell, Micro cell, Pico cell , Femto cell, etc.
  • These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services.
  • the "indication" mentioned in the embodiments of the present application may be a direct indication, may also be an indirect indication, and may also mean that there is an association relationship.
  • a indicates B which can mean that A directly indicates B, for example, B can be obtained through A; it can also indicate that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; it can also indicate that there is an association between A and B relation.
  • the term "corresponding" may indicate that there is a direct or indirect correspondence between the two, or that there is an association between the two, or that it indicates and is indicated, configuration and is configuration etc.
  • predefinition can be realized by pre-saving corresponding codes, tables or other methods that can be used to indicate relevant information in devices (for example, including terminal devices and network devices). Do limited. For example, pre-defined may refer to defined in the protocol.
  • the "protocol” may refer to a standard protocol in the communication field, for example, it may include LTE protocol, NR protocol and related protocols applied in future communication systems, which is not limited in this application.
  • FIG. 1 to FIG. 4 are system frameworks from vehicle-mounted terminals to vehicle-mounted terminals provided by the present application.
  • all terminals including terminal 1 and terminal 2 performing side line communication are within the coverage of the same network device, so all terminals can receive the Configure signaling to perform sidelink communication based on the same sidelink configuration.
  • some terminals performing lateral communication are located within the coverage of network equipment, and these terminals (ie, terminal 1) can receive configuration signaling from network equipment, and Sidewalk communication is performed according to the configuration of the network device.
  • the terminal outside the network coverage i.e. terminal 2 cannot receive the configuration signaling of the network equipment.
  • the terminal outside the network coverage will The sidelink configuration is determined by the information carried in the sidelink broadcast channel PSBCH sent by the internal terminal, and sidelink communication is performed.
  • all terminals including terminal 1 and terminal 2 performing side communication are located outside the network coverage, and all terminals determine the side configuration according to the pre-configuration information to perform side communication .
  • Device-to-device communication is a sidelink (Sidelink, SL) transmission technology based on D2D, which is different from the way communication data is received or sent by network devices in traditional cellular systems, so it has higher spectral efficiency and lower transmission delay.
  • SL Sidelink
  • the Internet of Vehicles system adopts the method of terminal-to-terminal direct communication, and two transmission modes are defined in 3GPP: the first mode and the second mode.
  • the transmission resources of the terminal are allocated by the network equipment, and the terminal sends data on the sidelink according to the resources allocated by the network equipment; the network equipment can allocate resources for a single transmission to the terminal, and can also allocate semi-static transmission resources for the terminal resource. As shown in FIG. 1 , the terminal is located within the coverage of the network, and the network allocates transmission resources for sidelink transmission to the terminal.
  • the terminal selects a resource from the resource pool for data transmission.
  • the terminal is located outside the coverage area of the cell, and the terminal independently selects transmission resources from the pre-configured resource pool for sidelink transmission; or as shown in Figure 1, the terminal independently selects transmission resources for sidelink transmission from the resource pool configured by the network transmission.
  • Second mode resource selection is performed in the following two steps:
  • step 1
  • the terminal takes all available resources in the resource selection window as resource set A.
  • the terminal sends data in some time slots in the listening window but does not listen, all resources of these time slots in the corresponding time slots in the selection window are excluded.
  • the terminal uses the value set of the "resource reservation period" field in the resource pool configuration used to determine the corresponding time slot in the selection window.
  • the terminal detects the PSCCH within the listening window, measure the RSRP of the PSCCH or the RSRP of the PSSCH scheduled by the PSCCH, if the measured RSRP is greater than the SL-RSRP threshold, and according to the resources in the sideline control information transmitted in the PSCCH If the reservation information determines that the reserved resource is within the resource selection window, then the corresponding resource is excluded from the set A. If the remaining resources in resource set A are less than X% of all resources in resource set A before resource exclusion, raise the SL-RSRP threshold by 3dB and perform step 1 again.
  • the above possible values of X are ⁇ 20, 35, 50 ⁇ , and the terminal determines the parameter X from the value set according to the priority of the data to be sent.
  • the above SL-RSRP threshold is related to the priority carried in the PSCCH sensed by the terminal and the priority of the data to be sent by the terminal.
  • the terminal device uses the remaining resources after excluding some resources in the set A as the candidate resource set.
  • the terminal randomly selects several resources from the candidate resource set as sending resources for its initial transmission and retransmission.
  • Fig. 4 is a schematic diagram of unicast transmission provided by this application. As shown in FIG. 4 , unicast transmission is performed between terminal 1 and terminal 2 . For multicast transmission, its receivers are all terminals in a communication group, or all terminals within a certain transmission distance.
  • Fig. 5 is a schematic diagram of multicast transmission provided by this application. As shown in FIG. 5 , terminal 1, terminal 2, terminal 3 and terminal 4 form a communication group, wherein terminal 1 sends data, and other terminal devices in the group are receiver terminals.
  • the receiving end is any terminal around the sending end terminal.
  • Fig. 6 is a schematic diagram of broadcast transmission provided by the present application. As shown in FIG. 6 , terminal 1 is a transmitting terminal, and other terminals around it, terminal 2 to terminal 6 are all receiving terminals.
  • full listening means that the terminal device can listen to data sent by other terminals in all time slots (or subframes) except the time slot for sending data; Partial sensing (partial sensing) is for energy saving of the terminal. The terminal only needs to sense part of the time slot (or subframe), and selects resources based on the result of partial sensing.
  • the upper layer when the upper layer does not configure partial interception, it defaults to full interception for resource selection.
  • Fig. 7 is a schematic diagram of resource selection based on interception provided by the present application.
  • the terminal device will select resources within [n+T1, n+T2] according to the interception result in the interception window [n-1000, n-1].
  • the time unit of the listening window and the selection window is at least one of the following: millisecond, time slot, and subframe.
  • the time n includes at least one of the following: the time when resource selection is triggered, the time when resource reselection is triggered, the time when the upper layer triggers the lower layer to report resources, and the time when a new data packet arrives.
  • the above multiple times may be the same time, for example, the time when resource selection is triggered is also the time when a new data packet arrives; the time when resource reselection is triggered is also the time when a new data packet arrives; the time when resource selection is triggered, At the same time, it is also the moment when the upper layer triggers the lower layer to report resources.
  • T 2min (prio TX ) ⁇ T 2 ⁇ 100
  • T 2min (prio TX ) is a parameter configured by the upper layer, and the selection of T 1 should be greater than the processing delay of the terminal equipment, and the selection of T 2 requires Within the range of service delay requirements, for example, if the service delay requirement is 50ms, then 20 ⁇ T 2 ⁇ 50, and the service delay requirement is 100ms, then 20 ⁇ T 2 ⁇ 100.
  • the process of terminal equipment selecting resources in the selection window is as follows:
  • the terminal device will select all available resources in the window as a set A.
  • the terminal device has no listening result for some subframes in the listening window, the resources of these subframes in the corresponding subframes in the selection window are excluded.
  • PSSCH-RSRP Physical Sidelink Control Channel
  • RSRP Reference Signal Received Power
  • the terminal device detects a Physical Sidelink Control Channel (PSCCH) within the listening window, measure the reference signal received power ( Reference Signal Received Power, RSRP), if the measured PSSCH-RSRP is higher than the PSSCH-RSRP threshold, and there is a resource conflict between the reserved transmission resources determined by the reserved information in the control information and the data to be sent by the user, the user Exclude the resource from set A.
  • the selection of the PSSCH-RSRP threshold is determined by the detected priority information carried in the PSCCH and the priority of the data to be transmitted by the terminal.
  • the terminal device will increase the threshold of PSSCH-RSRP by 3dB, and repeat steps 1-3 until the number of remaining resources in set A is greater than the total number of resources 20% of.
  • the terminal device performs sidelink received signal strength indicator (Sidelink Received Signal Strength Indicator, SL RSSI) detection on the remaining resources in set A, and sorts them according to the energy level, and sorts the 20% with the lowest energy (relative to the resources in set A) Number of resources) Resources are put into collection B.
  • sidelink received signal strength indicator Sidelink Received Signal Strength Indicator, SL RSSI
  • the terminal selects a resource from set B with a medium probability for data transmission.
  • the terminal device based on partial interception selects Y time slots in the resource selection window, and judges whether the resources on the Y time slots can be used as candidate resources according to the interception results, and if so, put them in In the set S B , if the number of elements in the set S B is greater than or equal to 20% of the total number of resources on Y time slots, report S B to the upper layer.
  • the specific resource selection process can refer to the operation steps described in the standard (3GPP TS36.213), and the above only exemplifies several main resource selection steps.
  • the terminal device may also perform resource selection based on a randomly selected resource selection method.
  • single-carrier-based transmission is a typical transmission method, while the physical layer protocol (14.1.1.6 TS36.213) only includes random selection content based on multi-carrier, and does not include random selection based on single-carrier physical layer process.
  • the physical layer does not include the process of resource exclusion, and the physical layer does not have the step of reporting the candidate resource set to the upper layer. That is, all the resources in the resource pool are used as candidate resources, randomly selected according to equal probability, and then the high layer notifies the physical layer of the selected resources, and the terminal device uses the notified resources to send the sidelink (SL).
  • the embodiments of the present application provide a resource selection method and a terminal device, which are not only applicable to a single carrier, but also can reduce the probability of resource collision, thereby improving the reliability of the random selection mechanism and system performance.
  • Fig. 8 is a schematic flowchart of a wireless communication method 200 provided by an embodiment of the present application, and the method 200 may be executed by a terminal device. It can also be the sender for sending data.
  • the terminal device may be the terminal B mentioned above, and the terminal device may be the terminal A mentioned above.
  • the method 100 may include part or all of the following:
  • the first resource includes resources allocated and/or reserved by the terminal device for other information
  • the terminal device when the terminal device selects transmission resources in a random selection manner in the resource pool, it needs to exclude some resources from the candidate resources.
  • the excluded resources include resources that the terminal device itself has allocated and/or reserved for other information. resource.
  • the terminal device may form a set A with all resources in the resource selection window.
  • the set A may be expressed as (a0, a1, a2, ..., ax), where ax represents a time slot (slot) resource; based on this, the terminal device may allocate and/or transmit other information based on the terminal device For the reserved first resource, resources in the set A are excluded to obtain a candidate resource set.
  • the other information may include data and/or information on the sidelink, and may also include data and/or information on the uplink.
  • the terminal device may exclude resources in the resource selection window based on the first resource allocated and/or reserved by the terminal device for other information, to obtain a set of candidate resources; furthermore, in the candidate resources
  • the resources of the target data are selected randomly in the collection. It is not only applicable to a single carrier, but also reduces the collision probability of randomly selected resources by adding a resource exclusion link to exclude the conflicting first resource, thereby improving the reliability of the random selection mechanism and system performance.
  • the terminal device determines whether to use a random selection method for resource selection, and when determining to use a random selection method for resource selection, excludes resources in the resource selection window based on the first resource, and then obtains the A collection of candidate resources.
  • this application does not limit the triggering manner of whether the terminal device "determines whether to use random selection to select resources".
  • “determine whether to use random selection for resource selection” may be triggered by the terminal device.
  • “determine whether to use a random selection method for resource selection” may be configured or indicated by a high layer of the terminal device.
  • “determine whether to use random selection for resource selection” may also be triggered by other events. For example, when a certain event is sent or a certain condition is met, the terminal device is triggered to select resources available for target data of the terminal device within a resource selection window in a random selection manner.
  • the first resource mentioned in this application may refer to any resource that has been occupied or selected but has not been used to transmit data or information.
  • the term “reservation” involved in this application may refer to resource reservation for periodically sending data, or reservation of retransmission resources.
  • the term “allocation” involved in this application may refer to the initial transmission of a single transmission, such as the initial transmission resources allocated for the initial transmission of PSCCH/PSSCH, PUCCH/PUSCH, which have been selected by the upper layer of the terminal device And told the physical layer, but there is no data sent at the current moment.
  • the first resource may be a resource where a resource conflict will occur when the target data is sent on the first resource.
  • the other data includes uplink information; wherein, the S110 may include:
  • the candidate resource set is obtained by excluding resources overlapping with the first resource within the resource selection window.
  • the terminal device obtains the resource by excluding resources overlapping with the uplink resource in the resource selection window.
  • the subcarrier spacing corresponding to the first resource is different from the subcarrier spacing corresponding to the resources in the resource selection window.
  • the uplink information includes at least one of the following:
  • PUCCH Physical Uplink Control Channel
  • PUSCH Physical Uplink Shared Channel
  • CSI Channel State Information
  • PRACH Physical Random Access Channel
  • the terminal device may be allowed to report PSFCH feedback information on the sidelink (Sidelink) to the network device.
  • the uplink information may include sidelink feedback information carried by the PUCCH or sidelink feedback information carried by the PUSCH.
  • the other data includes sideline control information SCI and/or sideline data.
  • the first resources include: unused resources delivered to the physical layer, and/or resources indicated in sent sidelink control information (Sidelink Control Information, SCI).
  • SCI Servicelink Control Information
  • the time slot where the resource indicated by the SCI is the same as or different from the time slot where the SCI is located.
  • the first resource may include an unused resource delivered to the physical layer by a high layer of the terminal device, and/or the first resource includes the resource indicated by the terminal device in the sent SCI.
  • resources already occupied by the terminal device may be unused resources, that is, not yet used for sending SCI and/or sidelink data.
  • the first resource is located within the resource selection window; wherein, the S110 may include:
  • the candidate resource set is obtained by excluding the first resource in the resource selection window.
  • the terminal device may directly exclude the first resource in the resource selection window, so as to obtain the candidate resource set.
  • the first resource is an aperiodic resource.
  • the terminal device may directly exclude the first resource in the resource selection window to obtain the candidate resource set.
  • the first resource is a periodic resource
  • the periodic resource includes at least one resource within the resource selection window.
  • the first resource in the resource selection window includes at least one periodic resource
  • the terminal device may directly exclude the at least one periodic resource in the resource selection window to obtain the A collection of candidate resources.
  • the first resource is located outside the resource selection window; wherein, the S110 may include:
  • the candidate resource set is obtained by excluding a second resource within the resource selection window; wherein the second resource is a resource determined based on the first resource and located within the resource selection window.
  • the first resource is a periodic resource, and there is no resource in the periodic resource within the resource selection window.
  • the second resources include resources within the selection window that are distributed according to a sending cycle of the target data with the first resource after the selection window as a reference point.
  • the terminal device may exclude the transmission cycle of the target data within the resource selection window and take the first resource as a reference point distributed resources to obtain the set of candidate resources.
  • the method 100 may also include:
  • the second resource is determined based on the location of the first resource and the sending period of the target data.
  • the second resource is determined in the following manner:
  • T2 T1-n ⁇ T
  • T2 represents the position of the second resource
  • T1 represents the position of the first resource
  • T represents the sending cycle of the target data
  • the first resource includes a retransmission resource for the sidelink data located within the resource selection window; wherein, the S110 may include:
  • the candidate resource set is obtained by excluding the retransmission resources in the resource selection window.
  • the terminal device obtains the candidate resource set by excluding retransmission resources for sidelink data within the resource selection window.
  • the information used to indicate the retransmission resource is carried in the sent SCI.
  • the side line control information SCI and/or side line data include at least one of the following:
  • PSSCH Physical Sidelink Shared Channel
  • PSCCH Physical Sidelink Control Channel
  • PSFCH Physical Sidelink Feedback Channel
  • PSFCH Physical Sidelink Feedback Channel
  • the method 100 may also include:
  • the terminal device may exclude resources in the resource selection window based on the first resource allocated and/or reserved by the terminal device for sending other information, to obtain a candidate resource set; furthermore, in the candidate resource set The resources of the target data are selected in a random selection manner; then, the resource set formed by the remaining resources in the resource selection window is reported.
  • the resource set formed by the remaining resources in the resource selection window may be reported to the high layer through the physical layer, so that the high layer can perform resource selection in the resource set formed by the reported remaining resources.
  • the terminal device reports the resource set formed by the remaining resources in the resource selection window to the high layer, so that the high layer randomly selects a resource, such as a time slot, from the reported resource set.
  • the terminal device may select a time slot resource for a single transmission based on the reported resource set.
  • the terminal device may select two time slot resources for initial transmission and potential retransmission based on the reported resource set.
  • the potential retransmission may be retransmission based on HARQ feedback.
  • the terminal device may select 3 time slot resources for initial transmission and potential multiple retransmissions based on the reported resource set.
  • the multiple retransmissions may be retransmissions based on HARQ feedback.
  • the S120 may include:
  • a random selection method is used to select resources for new transmission resources and/or retransmission resources of the target data.
  • the terminal device may select resources in the candidate resource set in a random selection manner.
  • this application eliminates the conflicting first resource by adding a resource exclusion link, which reduces the collision probability of randomly selected resources, thereby improving the reliability of the random selection mechanism and system performance.
  • the solution provided by the present application will be described below in combination with specific embodiments.
  • the terminal device can form a set A of all resources in the resource selection window, which can be expressed as (a0, a1, a2, ..., ax), where ax represents a time slot (slot) resource; based on this , the terminal device may exclude resources in the set A based on the first resource allocated and/or reserved by the terminal device for sending other information, to obtain a candidate resource set.
  • the other data includes uplink information.
  • Fig. 9 is an example of the first resource provided by the embodiment of the present application.
  • the terminal device is about to send uplink information on the Uu carrier. Since the time domain resource of the uplink information overlaps with set A with time slot a5, time slot a5 needs to be removed from set A.
  • the uplink information includes but not limited to Uu feedback information carried by PUCCH, PUSCH, CSI, PRACH, PUCCH/PUSCH or corresponding PSFCH feedback information on SL.
  • the The first resource and the resources in the resource selection window may partially overlap, and accordingly, the overlapping parts of the first resource and the resources in the resource selection window in the time domain need to be removed from set A .
  • the time slot of the first resource is 1 ms
  • the time slot of the resources in the resource selection window is 0.5 ms
  • the first resource and the resources in the resource selection window may partially overlap.
  • the terminal device can form a set A of all resources in the resource selection window, which can be expressed as (a0, a1, a2, ..., ax), where ax represents a time slot (slot) resource; based on this , the terminal device may exclude resources in the set A based on the first resource allocated and/or reserved by the terminal device for sending other information, to obtain a candidate resource set.
  • the first resource is an aperiodic resource within the resource selection window, such as an initial transmission resource.
  • the terminal device is about to send sidelink control information and/or sidelink data on the aperiodic sidelink resource. Since the time slot resource a3 where the aperiodic sidelink resource is located belongs to resource set A, it needs to start from The time slot resource a3 is removed from set A.
  • the time slot resource a3 may be determined as an SL resource to be used by the terminal device to send sidelink control information and/or sidelink data in the following manner:
  • the upper layer has selected the time slot resource a3 and delivered the information to the physical layer, but the time slot resource a3 has not been used; or
  • the terminal device has indicated in the sent SCI that the time slot resource a3 is an occupied resource, and the SCI indicates this time slot or a different time slot.
  • the terminal device can form a set A of all resources in the resource selection window, which can be expressed as (a0, a1, a2, ..., ax), where ax represents a time slot (slot) resource; based on this , the terminal device may exclude resources in the set A based on the first resource allocated and/or reserved by the terminal device for sending other information, to obtain a candidate resource set.
  • the first resource is located in the resource selection window and is included as a periodic resource.
  • the terminal device sends sidelink control information and/or sidelink data on the sidelink (SL) resources based on the period P2.
  • the time slot resources a1 and a8 need to be removed from the set A.
  • time slot resources a1 and a8 may be determined as SL resources to be used by the terminal device for sending sidelink control information and/or sidelink data in the following manner:
  • the upper layer has selected the time slot resources a1 and a8 and delivered the information to the physical layer, but the time slot resources a1 and a8 have not been used; or
  • the terminal device has indicated in the sent SCI that the time slot resources a1 and a8 are occupied resources, and the SCI indicates this time slot or a different time slot.
  • the terminal device can form a set A of all resources in the resource selection window, which can be expressed as (a0, a1, a2, ..., ax), where ax represents a time slot (slot) resource; based on this , the terminal device may exclude resources in the set A based on the first resource allocated and/or reserved by the terminal device for sending other information, to obtain a candidate resource set.
  • the first resource is located outside the resource selection window, at this time, the terminal device may exclude the second resource in the set A determined based on the first resource.
  • the terminal device sends sidelink control information and/or sidelink data on the sidelink (SL) resource based on the period P1, if the terminal device selects the resource on the a9 time slot in the resource selection window , and assume that the sending period of the target data is P3, that is, the resources of the target data are reserved according to the period P3; Time slot a9 is removed from A.
  • the second resource can be obtained as b1-n*P3, that is, the slot a9; where b1 is the position of the first resource that transmits the conflict, and n is Integer, and n ⁇ 0.
  • the resource where b0 resides may be an initial transmission resource.
  • the terminal device can form a set A of all resources in the resource selection window, which can be expressed as (a0, a1, a2, ..., ax), where ax represents a time slot (slot) resource; based on this , the terminal device may exclude resources in the set A based on the first resource allocated and/or reserved by the terminal device for sending other information, to obtain a candidate resource set.
  • the first resource includes a retransmission resource for the sidelink data located within the resource selection window.
  • Fig. 10 is another example of the first resource provided by the embodiment of the present application.
  • the terminal device indicates in the sent SCI that the potential retransmission resource of TB1 has been reserved, the SL resource for the initial transmission of TB1 is used to transmit the initial transmission of TB1, and the SCI of the initial transmission of TB1 indicates two additional TB1 retransmission resources. For example, if the time slots of the two TB1 retransmitted SL resources are time slots a1 and a3, then time slots a1 and a3 need to be removed from the set A.
  • FIG. 9 and FIG. 10 are only examples of the present application, and should not be construed as limiting the present application.
  • the overlapping of time-domain resources is not limited to: complete overlapping of time slots, overlapping of partial symbols in a time slot, or inclusion of smaller time slots in a larger time slot.
  • the sequence numbers of the above-mentioned processes do not mean the order of execution, and the order of execution of the processes should be determined by their functions and internal logic, and should not be used in this application.
  • the implementation of the examples constitutes no limitation.
  • the terms “downlink” and “uplink” are used to indicate the transmission direction of signals or data, wherein “downlink” is used to indicate that the transmission direction of signals or data is from the station to the user equipment in the cell For the first direction, “uplink” is used to indicate that the signal or data transmission direction is the second direction from the user equipment in the cell to the station, for example, “downlink signal” indicates that the signal transmission direction is the first direction.
  • the term "and/or" is only an association relationship describing associated objects, indicating that there may be three relationships. Specifically, A and/or B may mean: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" in this article generally indicates that the contextual objects are an "or" relationship.
  • Fig. 11 is a schematic block diagram of a terminal device 200 according to an embodiment of the present application.
  • the terminal device 200 may include:
  • the exclusion unit 210 is configured to exclude resources in the resource selection window based on the first resource to obtain a candidate resource set; the first resource includes resources allocated and/or reserved by the terminal device for other information;
  • the selection unit 220 is configured to select resources of target data in a random selection manner in the candidate resource set.
  • the other data includes uplink information
  • the exclusion unit 210 is specifically used for:
  • the candidate resource set is obtained by excluding resources overlapping with the first resource within the resource selection window.
  • the subcarrier spacing corresponding to the first resource is different from the subcarrier spacing corresponding to the resources in the resource selection window.
  • the uplink information includes at least one of the following:
  • Physical uplink control channel PUCCH Physical uplink control channel PUCCH, physical uplink shared channel PUSCH, channel state information CSI, physical random access channel PRACH, Uu feedback information carried by PUCCH or Uu feedback information carried by PUSCH, sidelink feedback information carried by PUCCH or sidelink information carried by PUSCH Line feedback information.
  • the other data includes sideline control information SCI and/or sideline data.
  • the first resources include: unused resources delivered to the physical layer, and/or resources indicated in the sent sideline control information SCI.
  • the time slot in which the resource indicated by the SCI is located is the same as or different from the time slot in which the SCI is located.
  • the first resource is located within the resource selection window
  • the exclusion unit 210 is specifically used for:
  • the candidate resource set is obtained by excluding the first resource in the resource selection window.
  • the first resource is an aperiodic resource.
  • the first resource is a periodic resource
  • the periodic resource includes at least one resource within the resource selection window.
  • said first resource is located outside said resource selection window
  • the exclusion unit 210 is specifically used for:
  • the second resource is a resource determined based on the first resource and located within the resource selection window.
  • the first resource is a periodic resource, and there is no resource in the periodic resource within the resource selection window.
  • the second resource includes resources within the selection window that are distributed according to the sending period of the target data with the first resource after the selection window as a reference point.
  • the exclusion unit 210 is also used for:
  • the second resource is determined based on the location of the first resource and the sending period of the target data.
  • the exclusion unit 210 is specifically used for:
  • the second resource is determined by:
  • T2 T1-n ⁇ T
  • T2 represents the position of the second resource
  • T1 represents the position of the first resource
  • T represents the sending cycle of the target data
  • the first resource includes a retransmission resource for the sidelink data located within the resource selection window;
  • the exclusion unit 210 is specifically used for:
  • the candidate resource set is obtained by excluding the retransmission resources in the resource selection window.
  • the information used to indicate the retransmission resource is carried in the sent sideline control information SCI.
  • the side line control information SCI and/or side line data include at least one of the following:
  • the physical sidelink shared channel PSSCH the physical sidelink control channel PSCCH, the physical sidelink feedback channel PSFCH, or the feedback information carried by the PSFCH.
  • the selection unit 220 is also used for:
  • the selection unit 220 is specifically used to:
  • a random selection method is used to select resources for new transmission resources and/or retransmission resources of the target data.
  • the device embodiment and the method embodiment may correspond to each other, and similar descriptions may refer to the method embodiment.
  • the terminal device 200 shown in FIG. 11 may correspond to the corresponding subject in executing the method 100 of the embodiment of the present application, and the aforementioned and other operations and/or functions of each unit in the terminal device 200 are for realizing the For the sake of brevity, the corresponding processes in each method are not repeated here.
  • the functional modules may be implemented in the form of hardware, may also be implemented by instructions in the form of software, and may also be implemented by a combination of hardware and software modules.
  • each step of the method embodiment in the embodiment of the present application can be completed by an integrated logic circuit of the hardware in the processor and/or instructions in the form of software, and the steps of the method disclosed in the embodiment of the present application can be directly embodied as hardware
  • the decoding processor is executed, or the combination of hardware and software modules in the decoding processor is used to complete the execution.
  • the software module may be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, and registers.
  • the storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps in the above method embodiments in combination with its hardware.
  • processing unit and the communication unit mentioned above may be implemented by a processor and a transceiver, respectively.
  • Fig. 12 is a schematic structural diagram of a communication device 300 according to an embodiment of the present application.
  • the communication device 300 may include a processor 310 .
  • the processor 310 can invoke and run a computer program from the memory, so as to implement the method in the embodiment of the present application.
  • the communication device 300 may further include a memory 320 .
  • the memory 320 may be used to store indication information, and may also be used to store codes, instructions, etc. executed by the processor 310 .
  • the processor 310 can invoke and run a computer program from the memory 320, so as to implement the method in the embodiment of the present application.
  • the memory 320 may be an independent device independent of the processor 310 , or may be integrated in the processor 310 .
  • the communication device 300 may further include a transceiver 330 .
  • the processor 310 can control the transceiver 330 to communicate with other devices, specifically, can send information or data to other devices, or receive information or data sent by other devices.
  • Transceiver 330 may include a transmitter and a receiver.
  • the transceiver 330 may further include an antenna, and the number of antennas may be one or more.
  • bus system includes not only a data bus, but also a power bus, a control bus, and a status signal bus.
  • the communication device 300 may be the terminal device in the embodiment of the present application, and the communication device 300 may implement the corresponding processes implemented by the terminal device in each method of the embodiment of the present application, that is, the terminal device in the embodiment of the present application
  • the communication device 300 may correspond to the terminal device 200 in the embodiment of the present application, and may correspond to a corresponding subject in performing the method 100 according to the embodiment of the present application, and for the sake of brevity, details are not repeated here.
  • a chip is also provided in the embodiment of the present application.
  • the chip may be an integrated circuit chip, which has signal processing capabilities and can implement or execute the methods, steps and logic block diagrams disclosed in the embodiments of the present application.
  • the chip can also be called system-on-chip, system-on-chip, system-on-chip or system-on-chip, etc.
  • the chip can be applied to various communication devices, so that the communication device installed with the chip can execute the methods, steps and logic block diagrams disclosed in the embodiments of the present application.
  • FIG. 13 is a schematic structural diagram of a chip 400 according to an embodiment of the present application.
  • the chip 400 includes a processor 410 .
  • the processor 410 can invoke and run a computer program from the memory, so as to implement the method in the embodiment of the present application.
  • the chip 400 may further include a memory 420 .
  • the processor 410 can invoke and run a computer program from the memory 420, so as to implement the method in the embodiment of the present application.
  • the memory 420 may be used to store indication information, and may also be used to store codes, instructions, etc. executed by the processor 410 .
  • the memory 420 may be an independent device independent of the processor 410 , or may be integrated in the processor 410 .
  • the chip 400 may further include an input interface 430 .
  • the processor 410 may control the input interface 430 to communicate with other devices or chips, specifically, may obtain information or data sent by other devices or chips.
  • the chip 400 may further include an output interface 440 .
  • the processor 410 can control the output interface 440 to communicate with other devices or chips, specifically, can output information or data to other devices or chips.
  • the chip 400 can be applied to the terminal device in the embodiment of the present application, and the chip can implement the corresponding processes implemented by the terminal device in each method of the embodiment of the present application. For the sake of brevity, details are not repeated here. It should also be understood that various components in the chip 400 are connected through a bus system, wherein the bus system includes a power bus, a control bus, and a status signal bus in addition to a data bus.
  • the bus system includes a power bus, a control bus, and a status signal bus in addition to a data bus.
  • Processors mentioned above may include, but are not limited to:
  • DSP Digital Signal Processor
  • ASIC Application Specific Integrated Circuit
  • FPGA Field Programmable Gate Array
  • the processor may be used to implement or execute the methods, steps and logic block diagrams disclosed in the embodiments of the present application.
  • the steps of the method disclosed in the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor.
  • the software module may be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory or erasable programmable memory, register.
  • the storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps of the above method in combination with its hardware.
  • the memory mentioned above includes but not limited to:
  • non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), electronically programmable Erase Programmable Read-Only Memory (Electrically EPROM, EEPROM) or Flash.
  • the volatile memory can be Random Access Memory (RAM), which acts as external cache memory.
  • RAM Static Random Access Memory
  • SRAM Static Random Access Memory
  • DRAM Dynamic Random Access Memory
  • Synchronous Dynamic Random Access Memory Synchronous Dynamic Random Access Memory
  • SDRAM double data rate synchronous dynamic random access memory
  • Double Data Rate SDRAM, DDR SDRAM double data rate synchronous dynamic random access memory
  • Enhanced SDRAM, ESDRAM enhanced synchronous dynamic random access memory
  • SLDRAM synchronous connection dynamic random access memory
  • Direct Rambus RAM Direct Rambus RAM
  • Embodiments of the present application also provide a computer-readable storage medium for storing computer programs.
  • the computer-readable storage medium stores one or more programs, and the one or more programs include instructions, and the instructions, when executed by a portable electronic device including multiple application programs, can cause the portable electronic device to execute the method provided by the present application .
  • the computer-readable storage medium can be applied to the mobile terminal/terminal device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the mobile terminal/terminal device in the various methods of the embodiments of the present application , for the sake of brevity, it is not repeated here.
  • the embodiment of the present application also provides a computer program product, including a computer program.
  • the computer program product can be applied to the mobile terminal/terminal device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the mobile terminal/terminal device in the methods of the embodiments of the present application, for It is concise and will not be repeated here.
  • the embodiment of the present application also provides a computer program.
  • the computer program When the computer program is executed by a computer, the computer can execute the method provided in this application.
  • the computer program can be applied to the mobile terminal/terminal device in the embodiment of the present application.
  • the computer program When the computer program is run on the computer, the computer executes each method in the embodiment of the present application to be implemented by the mobile terminal/terminal device For the sake of brevity, the corresponding process will not be repeated here.
  • An embodiment of the present application further provides a communication system, and the communication system may include the above-mentioned terminal device and other devices, and for the sake of brevity, details are not repeated here.
  • the terms "system” and the like in this document may also be referred to as “network management architecture” or “network system”.
  • the technical solution of the embodiment of the present application is essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , including several instructions to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in the embodiment of the present application.
  • the aforementioned storage medium includes: various media capable of storing program codes such as U disk, mobile hard disk, read-only memory, random access memory, magnetic disk or optical disk.
  • the units/modules/components described above as separate/display components may or may not be physically separated, that is, they may be located in one place, or may also be distributed to multiple network units. Part or all of the units/modules/components can be selected according to actual needs to achieve the purpose of the embodiments of the present application.
  • the mutual coupling or direct coupling or communication connection shown or discussed above may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms .

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Abstract

Les modes de réalisation de la présente demande concernent un procédé de sélection de ressources et un dispositif terminal. Le procédé comprend les étapes consistant à : effectuer une exclusion sur des ressources dans une fenêtre de sélection de ressources sur la base d'une première ressource, de manière à obtenir un ensemble de ressources candidates, la première ressource comprenant une ressource attribuée et/ou réservée à d'autres informations par un dispositif terminal (S110) ; et sélectionner, à partir de l'ensemble de ressources candidates, une ressource de données cibles de manière aléatoire (S120). Le procédé peut s'appliquer à une seule porteuse. De plus, une liaison d'exclusion de ressource est ajoutée, de telle sorte qu'une première ressource, dans laquelle se produit une collision, peut être exclue, ce qui permet de réduire la probabilité de collision d'une ressource sélectionnée de manière aléatoire, et d'améliorant en outre la fiabilité d'un mécanisme de sélection aléatoire, ainsi que les performances du système.
PCT/CN2021/108989 2021-07-28 2021-07-28 Procédé de sélection de ressources et dispositif terminal WO2023004635A1 (fr)

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