WO2021068301A1 - Procédé et dispositif permettant d'effacer la mémoire cache, et procédé et appareil de traitement de la mémoire cache, et dispositif terminal - Google Patents

Procédé et dispositif permettant d'effacer la mémoire cache, et procédé et appareil de traitement de la mémoire cache, et dispositif terminal Download PDF

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Publication number
WO2021068301A1
WO2021068301A1 PCT/CN2019/113761 CN2019113761W WO2021068301A1 WO 2021068301 A1 WO2021068301 A1 WO 2021068301A1 CN 2019113761 W CN2019113761 W CN 2019113761W WO 2021068301 A1 WO2021068301 A1 WO 2021068301A1
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WIPO (PCT)
Prior art keywords
terminal device
parameter
time slot
time
indication information
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PCT/CN2019/113761
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English (en)
Chinese (zh)
Inventor
赵振山
卢前溪
林晖闵
Original Assignee
Oppo广东移动通信有限公司
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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 CN201980099437.6A priority Critical patent/CN114258698A/zh
Publication of WO2021068301A1 publication Critical patent/WO2021068301A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/10—Flow control between communication endpoints
    • H04W28/14—Flow control between communication endpoints using intermediate storage

Definitions

  • the embodiments of the present application relate to the field of mobile communication technologies, and in particular to a method for clearing a cache, a cache processing method, device, and terminal equipment.
  • NR New Radio
  • V2X Vehicle to Everything
  • HARQ hybrid automatic repeat request
  • PSSCH Physical Sidelink Shared Channel
  • ACK positive acknowledgement
  • NACK negative acknowledgement
  • the receiving end sends a NACK message to the sending end, the receiving end will not clear the data in the buffer, but wait for the sending end to send the retransmission data of the data, but if the receiving end no longer receives the retransmission data sent by the sending end, this If the receiving end does not clear the data in the buffer, it will cause a waste of resources.
  • the embodiments of the present application provide a method for clearing a cache, a cache processing method, device, and terminal equipment.
  • the first terminal device receives first indication information, where the first indication information is used to determine the first moment of clearing the cache;
  • the buffer is used to store the side line data received by the first terminal device.
  • the first terminal device receives the first side line data, and the first terminal device determines to clear or use a buffer (Buffer) according to a first criterion, wherein the first side line data is a transmission block (TB) First transmission or retransmission.
  • Buffer buffer
  • TB transmission block
  • the device for clearing the cache provided by the embodiment of the present application is applied to a first terminal device, and the device includes:
  • a receiving unit configured to receive first indication information, where the first indication information is used to determine the first moment when the buffer is cleared;
  • the buffer is used to store the side line data received by the first terminal device.
  • the cache processing apparatus provided in the embodiment of the present application is applied to a first terminal device, and the apparatus includes:
  • a receiving unit for receiving the first side row data
  • the processing unit is configured to determine to clear or use the buffer according to the first criterion, where the first side row data is the first transmission or retransmission of a transmission block.
  • the terminal device provided in the embodiment of the present application includes 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 to execute the above-mentioned method for clearing the cache.
  • the chip provided by the embodiment of the present application is used to implement the above-mentioned method for clearing the cache.
  • the chip includes: a processor, configured to call and run a computer program from the memory, so that the device installed with the chip executes the above-mentioned method for clearing the cache.
  • the computer-readable storage medium provided by the embodiment of the present application is used to store a computer program, and the computer program causes the computer to execute the above-mentioned method for clearing the cache.
  • the computer program product provided by the embodiment of the present application includes computer program instructions, and the computer program instructions cause the computer to execute the above-mentioned method for clearing the cache.
  • the computer program provided by the embodiment of the present application when it runs on a computer, causes the computer to execute the above-mentioned method for clearing the cache.
  • the first terminal device (that is, the receiving end of the side line data) can determine the first time to clear the cache according to the received first instruction information, and then can clear the cache at the first time, thereby avoiding waste of resources .
  • FIG. 1 is a schematic diagram of a communication system architecture provided by an embodiment of the present application.
  • FIG 2-1 is a schematic diagram of Mode A provided by an embodiment of the present application.
  • Figure 2-2 is a schematic diagram of mode B provided by an embodiment of the present application.
  • Figure 3-1 is a schematic diagram of unicast provided by an embodiment of the present application.
  • Figure 3-2 is a schematic diagram of multicast provided by an embodiment of the present application.
  • Figure 3-3 is a schematic diagram of broadcasting provided by an embodiment of the present application.
  • Figure 3-4 is a schematic diagram of feedback based on unicast transmission provided by an embodiment of the present application.
  • FIG. 4 is a schematic flowchart of a method for clearing a cache provided by an embodiment of the application
  • FIG. 5 is a schematic diagram of the structural composition of an apparatus for clearing a cache provided by an embodiment of the application.
  • FIG. 6 is a schematic flowchart of a cache processing method provided by an embodiment of the application.
  • FIG. 7 is a schematic diagram of the structural composition of a cache processing apparatus provided by an embodiment of the application.
  • FIG. 8 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • FIG. 9 is a schematic structural diagram of a chip of an embodiment of the present application.
  • FIG. 10 is a schematic block diagram of a communication system provided by an embodiment of the present application.
  • LTE Long Term Evolution
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • 5G communication system 5G communication system or future communication system.
  • the communication system 100 applied in the embodiment of the present application is shown in FIG. 1.
  • the communication system 100 may include a network device 110, and the network device 110 may be a device that communicates with a terminal 120 (or called a communication terminal or terminal).
  • the network device 110 may provide communication coverage for a specific geographic area, and may communicate with terminals located in the coverage area.
  • the network device 110 may be an evolved base station (Evolutional Node B, eNB, or eNodeB) in an LTE system, or a wireless controller in a cloud radio access network (Cloud Radio Access Network, CRAN), or
  • the network equipment can be a mobile switching center, a relay station, an access point, an in-vehicle device, a wearable device, a hub, a switch, a bridge, a router, a network side device in a 5G network, or a network device in a future communication system, etc.
  • the communication system 100 also includes at least one terminal 120 located within the coverage area of the network device 110.
  • the "terminal” used here includes, but is not limited to, connection via a wired line, such as via a public switched telephone network (PSTN), digital subscriber line (Digital Subscriber Line, DSL), digital cable, and direct cable connection; And/or another data connection/network; and/or via a wireless interface, such as for cellular networks, wireless local area networks (WLAN), digital TV networks such as DVB-H networks, satellite networks, AM-FM Broadcast transmitter; and/or another terminal's device configured to receive/send communication signals; and/or Internet of Things (IoT) equipment.
  • PSTN public switched telephone network
  • DSL Digital Subscriber Line
  • DSL Digital Subscriber Line
  • DSL Digital Subscriber Line
  • DSL Digital Subscriber Line
  • DSL Digital Subscriber Line
  • DSL Digital Subscriber Line
  • DSL Digital Subscriber Line
  • DSL Digital Subscriber Line
  • DSL Digital Subscriber Line
  • DSL Digital Subscriber Line
  • a terminal set to communicate through a wireless interface may be referred to as a "wireless communication terminal", a “wireless terminal” or a “mobile terminal”.
  • mobile terminals include, but are not limited to, satellite or cellular phones; Personal Communications System (PCS) terminals that can combine cellular radio phones with data processing, fax, and data communication capabilities; can include radio phones, pagers, Internet/intranet PDA with internet access, web browser, memo pad, calendar, and/or Global Positioning System (GPS) receiver; and conventional laptop and/or palmtop receivers or others including radio telephone transceivers Electronic device.
  • PCS Personal Communications System
  • GPS Global Positioning System
  • Terminal can refer to access terminal, user equipment (UE), user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication equipment, 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 (Wireless Local Loop, WLL) station, a personal digital processing (Personal Digital Assistant, PDA), with wireless communication Functional handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminals in 5G networks, or terminals in the future evolution of PLMN, etc.
  • SIP Session Initiation Protocol
  • WLL Wireless Local Loop
  • PDA Personal Digital Assistant
  • direct terminal connection (Device to Device, D2D) communication may be performed between the terminals 120.
  • the 5G communication system or 5G network may also be referred to as a New Radio (NR) system or NR network.
  • NR New Radio
  • FIG. 1 exemplarily shows one network device and two terminals.
  • the communication system 100 may include multiple network devices and the coverage of each network device may include other numbers of terminals. This embodiment of the present application There is no restriction on this.
  • the communication system 100 may also include other network entities such as a network controller and a mobility management entity, which are not limited in the embodiment of the present application.
  • network entities such as a network controller and a mobility management entity, which are not limited in the embodiment of the present application.
  • the devices with communication functions in the network/system in the embodiments of the present application may be referred to as communication devices.
  • the communication device may include a network device 110 and a terminal 120 with communication functions, and the network device 110 and the terminal 120 may be the specific devices described above, which will not be repeated here; communication
  • the device may also include other devices in the communication system 100, such as other network entities such as a network controller and a mobility management entity, which are not limited in the embodiment of the present application.
  • D2D Device to Device
  • D2D communication is based on Sidelink (SL) transmission technology, which is different from the way in which communication data is received or sent through base stations in traditional cellular systems.
  • SL Sidelink
  • the Internet of Vehicles system uses D2D communication (that is, direct device-to-device communication). , So it has higher spectral efficiency and lower transmission delay.
  • the Third Generation Partnership Project (3GPP) defines two transmission modes: Mode A and Mode B. The mode A and mode B are described below.
  • the transmission resources of the terminal equipment are allocated by the base station, and the terminal equipment transmits data on the side link according to the resources allocated by the base station; the base station can allocate a single transmission for the terminal equipment Resources, semi-static transmission resources can also be allocated to terminal devices.
  • Mode B As shown in Figure 2-2, the terminal device selects a resource in the resource pool to send data. Specifically, the terminal device may select transmission resources from the resource pool by means of listening, or select transmission resources from the resource pool by means of random selection.
  • mode 1 is that network equipment allocates transmission resources for terminal equipment (corresponding to the above-mentioned mode A)
  • mode 2 is that terminal equipment selects transmission resources ( Corresponds to the above mode B).
  • LTE-V2X supports broadcast transmission.
  • unicast and multicast transmissions are introduced in NR-V2X.
  • unicast transmission there is only one terminal device at the receiving end.
  • the receiving end is all terminal devices in a communication group, or all terminal devices within a certain transmission distance, as shown in Figure 3-2, UE1, UE2, UE3, and UE4 form a communication group , Where UE1 sends data, and other terminal devices in the communication group are all receivers.
  • the receiving end is any terminal device, as shown in Figure 3-3, where UE1 is the transmitting end, and other terminal devices around it are all receiving ends.
  • a side-line feedback channel is introduced.
  • the sender sends sideline data to the receiver, and the receiver sends HARQ feedback information (ACK information or NACK information) to the sender.
  • the sender judges whether data retransmission is required based on the feedback information sent by the receiver.
  • HARQ feedback information is carried in a side-line feedback channel, such as a physical side-link feedback channel (PSFCH), refer to Figure 3-4.
  • PSFCH physical side-link feedback channel
  • the side feedback can be activated or deactivated through pre-configuration information or network configuration information. If side-line feedback is activated, the receiving end receives the side-line data sent by the sending end, and feeds back ACK information or NACK information to the sending end according to the detection result, and the sending end decides to send retransmission data or new data according to the feedback information of the receiving end. If the side line feedback is deactivated, the receiving end does not need to send feedback information.
  • the sending end usually sends data by blind retransmission. For example, the sending end sends each side line data K times repeatedly, and K is a positive integer greater than 1, Instead of deciding whether to send retransmitted data based on the feedback information from the receiving end.
  • the receiving end receives the side line data sent by the sending end, and the receiving end needs to buffer the received side line data, and judge whether the PSCCH scheduling needs to be detected according to the detection result of the physical side link control channel (PSCCH) PSSCH.
  • the receiver sends HARQ feedback information (ACK information or NACK information) to the sender according to the PSSCH detection result. If the receiver sends NACK information, the receiver needs to buffer the sideline data carried by the PSSCH , And combine and decode the side row data with the side row data retransmitted by the sender to determine whether the side row data is received correctly.
  • HARQ feedback information ACK information or NACK information
  • Each side-line data transmission corresponds to a HARQ process number, and the maximum HARQ process supported by the terminal device is limited. For example, the terminal device supports a maximum of 8 HARQ processes. For a certain HARQ process, only when the receiving end receives the New Data Indicator (NDI) corresponding to the HARQ process is flipped, the receiving end clears the buffer corresponding to the HARQ process.
  • NDI New Data Indicator
  • a Sidelink Control Information indicates the first transmission of data and all retransmissions at the same time. Therefore, when the receiving end receives the SCI, it can know All the transmission resources of the data, and the data of each transmission is buffered, combined, decoded, etc., so as to determine whether the data is received correctly. When the receiving end receives the last data transmission of the data, the buffer will be cleared to receive Other data.
  • SCI Sidelink Control Information
  • a side-line feedback mechanism is introduced.
  • the receiving end feeds back NACK information to the sending end, the receiving end will not clear the data in the buffer, but wait for the sending end to send the retransmission data of the data, but if The receiving end no longer receives the retransmission data for the data from the sending end. For example, the distance between the sending end and the receiving end is getting farther and farther. At this time, if the receiving end does not clear the data in the buffer all the time, resources will be wasted. For this reason, the following technical solutions of the embodiments of the present application are proposed. The technical solutions of the embodiments of the present application can be applied to, but not limited to, the NR-V2X system.
  • FIG. 4 is a schematic flowchart of a method for clearing a cache provided by an embodiment of the application. As shown in FIG. 4, the method for clearing a cache includes the following steps:
  • Step 401 The first terminal device receives first indication information, where the first indication information is used to determine the first moment of clearing the cache; where the cache is used to store the side row data received by the first terminal device.
  • the first terminal device is the receiving end of the side line data. After the receiving end receives the side line data sent by the sending end, it needs to buffer the received side line data. If the first terminal device receives the first indication information, the first terminal device may determine the first time to clear the cache according to the first indication information.
  • the first terminal device receiving the first indication information may be implemented in any of the following ways:
  • Manner 1 The first terminal device receives the first indication information sent by the network device.
  • the network device may be a base station, such as a gNB.
  • the first indication information is carried in radio resource control (Radio Resource Control, RRC) signaling or downlink control information (Downlink Control Information, DCI).
  • RRC Radio Resource Control
  • DCI Downlink Control Information
  • the network device sends the first indication information to the first terminal device through RRC signaling or DCI.
  • Manner 2 The first terminal device receives the first indication information sent by the second terminal device.
  • the second terminal device is a terminal device that sends the sideline data.
  • the second terminal device is a group head terminal device of a communication group in which the first terminal device is located.
  • the group head terminal device is a terminal device that has functions such as resource management, resource scheduling, and resource allocation in a communication group.
  • the first indication information is carried in SCI or side row RRC signaling.
  • the second terminal device sends the first indication information to the first terminal device through SCI or sideline RRC signaling.
  • the first indication information is used to determine the first moment of clearing the cache.
  • the specific implementation of the first indication information is described below.
  • the first indication information is time slot indication information
  • the time slot indication information includes a system frame number (System Frame Number, SFN) and a time slot number.
  • the first terminal device determines the first time slot according to the SFN and the time slot number, and clears the buffer at the time corresponding to the first time slot.
  • time corresponding to the first time slot is the first time in the above solution.
  • the time slot indication information includes a direct frame number (Direct Frame Number, DFN) and a time slot number.
  • DFN Direct Frame Number
  • the first terminal device determines the second time slot according to the DFN and the time slot number, and clears the buffer at the time corresponding to the second time slot.
  • time corresponding to the second time slot is the first time in the above solution.
  • SFN or DFN is used to determine a frame (Frame), and the slot number is used to determine a slot in the frame.
  • one frame includes 10 subframes, each subframe is 1 millisecond, and one SFN period or DFN period includes 1024 frames, numbered 0, 1, ..., 1023.
  • the number of time slots included in each frame is related to the basic parameter set (numerology).
  • a subframe For example, if the subcarrier interval is 15kHz, then a subframe includes 10 time slots, and the corresponding time slot numbers are 0,1,...,9 ; If the subcarrier interval is 30kHz, a subframe includes 20 slots, and the corresponding slot numbers are 0,1,...,19; if the subcarrier interval is 60Hz, a subframe includes 40 slots, corresponding to The number of time slots is 0,1,...,39; and so on.
  • the first terminal device can determine the location of a time slot according to the SFN or DFN and the slot number in a frame. Therefore, the first terminal device can clear the buffer at the time corresponding to the time slot.
  • the first indication information is time slot offset indication information
  • the first terminal device determines the first time according to the time slot offset indication information and the reference time, and clears the buffer at the first time.
  • the time slot offset indication information is used to indicate N time slots, where N is a positive integer; there is an interval of the N time slots between the reference time and the first time.
  • the length of the time slot in the time slot offset indication information is determined according to the basic parameter set corresponding to the side row data transmission. Further, the basic parameter set includes at least subcarrier spacing.
  • the first terminal device clears the buffer at the time corresponding to the 13th time slot.
  • the reference time is one of the following:
  • the terminal can determine the positions of multiple times according to the time slot offset information and the time when the time slot number is 0.
  • the terminal uses the first available time as the time to clear the buffer. For example, if the number of time slots indicated by the time slot offset indication information is 3, and the reference time is the time when the time slot number is 0, the terminal can determine that the third time slot in each frame is possible to clear the buffer.
  • the terminal uses the third time slot in the next frame as the time to clear the buffer.
  • the first indication information is the first parameter M, where M is a positive integer.
  • the first terminal device obtains a second parameter K; where K is a positive integer; the first terminal device determines the first moment according to the first parameter M and the second parameter K, The cache is cleared at the first moment.
  • the first terminal device determines the first moment according to the first parameter M and the second parameter K, which can be implemented in but not limited to the following manners:
  • the first terminal device uses the K*(M+1)th time slot after the moment when the first indication information is received as the first moment; The terminal device clears the buffer at the first moment.
  • the first terminal device uses the K*(M+1)-1th time slot after the moment when the first indication information is received as the first moment; The first terminal device clears the buffer at the first moment.
  • the first terminal device uses the K*M-1th time slot after the moment when the first indication information is received as the first moment; the first terminal The device clears the cache at the first moment.
  • the first terminal device uses the K*Mth time slot after the moment when the first indication information is received as the first moment; the first terminal device is at The cache is cleared at the first moment.
  • acquiring the second parameter K by the first terminal device includes:
  • the first terminal device obtains the second parameter K according to the resource pool configuration information, or,
  • the first terminal device obtains the second parameter K according to network configuration information, or,
  • the first terminal device obtains the second parameter K according to priority information, or,
  • the first terminal device obtains the second parameter K according to the time delay information, or,
  • the first terminal device obtains the second parameter K according to the channel busy ratio (Channel Busy Ratio, CBR), or,
  • the first terminal device obtains the second parameter K according to the period parameter of the sideline feedback channel.
  • the period parameter of the sideline feedback channel refers to a time slot for transmitting the sideline feedback channel among several sideline time slots.
  • the period parameter is 4, which means that every 4 side-line time slots include a time slot for transmitting the side-line feedback channel.
  • the first parameter M in the above solution is the number of time slots or the number of time slot intervals.
  • the first terminal device may determine the first moment according to the number of time slots and the second parameter K, and clear the buffer at the first moment.
  • the number of time slots or the number of time slot intervals is determined according to at least one of the following information:
  • the time slot interval indication information indicated in the side row control information is, for example, the time interval between two adjacent transmission resources indicated in the side row control information (ie, SCI).
  • the side-line control information (ie, SCI) indicates multiple transmission resources, for example 4, it may indicate multiple time intervals between two adjacent transmission resources, for example, two adjacent transmission resources.
  • the time interval between the time slots is 4, 6, and 8 time slots respectively, and the maximum time interval of 8 can be taken as the number of time slots or the number of time slot intervals.
  • the side-line control information (ie SCI) includes an information field for indicating a time interval.
  • the information field is, for example, 4 bits, and the range of the time interval that can be indicated is 0-15, the maximum value of the time interval That is, it is 15, and the maximum value of the interval of 15 can be selected as the number of time slots or the number of time slot intervals.
  • a parameter M may be included in the resource pool configuration information, and the parameter M is the number of time slots or the number of time slot intervals.
  • V Periodic parameters of the side-line feedback channel.
  • the period P of the side-line feedback channel is configured through pre-configuration information or network configuration information, that is, every P side-line time slots include a time slot for transmitting the side-line feedback channel, which can be determined according to the parameter P
  • the length of the time slot is determined according to a basic parameter set corresponding to the sideline data transmission, wherein the basic parameter set includes at least a subcarrier interval.
  • the first terminal device if the first terminal device receives second instruction information after receiving the first instruction information, and the second instruction information is used to determine the second moment of clearing the cache, the The first terminal device clears the cache at the second moment according to the second instruction information.
  • the first terminal device receives the first indication information at time t1, and the first indication information is used to determine the first time to clear the buffer; then, it receives the second indication information at time t2, and the first indication information is The second indication information is used to determine the second time to clear the cache, and the time t2 is later than the time t1; then, the first terminal device clears the cache at the second time according to the second indication information.
  • the first time is later than t2, that is, when the first terminal device receives the second indication information, the buffer has not been cleared.
  • FIG. 5 is a schematic structural composition diagram of an apparatus for clearing a cache provided by an embodiment of the application, which is applied to a first terminal device. As shown in FIG. 5, the apparatus for clearing a cache includes:
  • the receiving unit 501 is configured to receive first indication information, where the first indication information is used to determine the first moment when the buffer is cleared;
  • the buffer is used to store the side line data received by the first terminal device.
  • the receiving unit 501 is configured to receive the first indication information sent by a network device.
  • the first indication information is carried in RRC signaling or DCI.
  • the receiving unit 501 is configured to receive the first indication information sent by the second terminal device.
  • the second terminal device is a terminal device that sends the sideline data.
  • the second terminal device is a group head terminal device of a communication group in which the first terminal device is located.
  • the first indication information is carried in SCI or side row RRC signaling.
  • the first indication information is time slot indication information.
  • the time slot indication information includes an SFN and a time slot number.
  • the device further includes:
  • the processing unit 502 is configured to determine a first time slot according to the SFN and the time slot number, and clear the buffer at a time corresponding to the first time slot.
  • the time slot indication information includes DFN and a time slot number.
  • the device further includes:
  • the processing unit 502 is configured to determine a second time slot according to the DFN and the time slot number, and clear the buffer at a time corresponding to the second time slot.
  • the first indication information is time slot offset indication information.
  • the device further includes:
  • the processing unit 502 is configured to determine the first moment according to the time slot offset indication information and a reference moment, and clear the buffer at the first moment.
  • the time slot offset indication information is used to indicate N time slots, where N is a positive integer; there is an interval of the N time slots between the reference time and the first time.
  • the length of the time slot is determined according to the basic parameter set corresponding to the side line data transmission.
  • the basic parameter set includes at least subcarrier spacing.
  • the reference time is one of the following:
  • the first indication information is a first parameter M, where M is a positive integer.
  • the device further includes:
  • the obtaining unit (not shown in the figure) is used to obtain the second parameter K; where K is a positive integer;
  • the processing unit 502 is configured to determine the first moment according to the first parameter M and the second parameter K, and clear the buffer at the first moment.
  • the processing unit 502 is configured to calculate the K*(M+1)th time slot or the K*(M+1)-1th time slot after the moment when the first indication information is received.
  • the first time slot or the K*M-1th time slot or the K*Mth time slot is regarded as the first moment; the buffer is cleared at the first moment.
  • the obtaining unit is configured to: obtain the second parameter K according to resource pool configuration information, or obtain the second parameter K according to network configuration information, or obtain the second parameter K according to priority information
  • the second parameter K, or the second parameter K is obtained according to the time delay information, or the second parameter K is obtained according to the CBR, or the second parameter K is obtained according to the period parameter of the side row feedback channel .
  • the first parameter M is the number of time slot intervals.
  • the number of time slot intervals is determined according to at least one of the following information:
  • Time slot interval indication information indicated in the side control information received by the first terminal device
  • the maximum time slot interval that can be indicated by the side-line control information is the maximum time slot interval that can be indicated by the side-line control information
  • Periodic parameters of the side-line feedback channel are Periodic parameters of the side-line feedback channel.
  • the length of the time slot is determined according to a basic parameter set corresponding to the sideline data transmission, wherein the basic parameter set includes at least a subcarrier interval.
  • the receiving unit 501 is further configured to receive second instruction information after receiving the first instruction information, and the second instruction information is used to determine a second moment when the cache is cleared;
  • the device further includes: a processing unit 502, configured to clear the buffer at the second time according to the second instruction information.
  • FIG. 6 is a schematic flowchart of a cache processing method provided by an embodiment of the application. As shown in FIG. 6, the cache processing method includes the following steps:
  • Step 601 The first terminal device receives the first side line data, and the first terminal device determines to clear or use the buffer according to the first criterion, where the first side line data is the first transmission or retransmission of a transmission block.
  • the first terminal device determines to clear or use the cache according to the first criterion, and any one of the following implementation manners may be adopted:
  • the first terminal device clears the data stored in the cache.
  • the first terminal device stores the first side row data in a cache.
  • the first terminal device replaces the data stored in the cache with the first side line data.
  • the first terminal device if the priority of the first side line data is higher than the priority of the data stored in the cache, the first terminal device replaces all the data stored in the cache with the first side line data. ⁇ Said data. In another embodiment, if a plurality of data are stored in the cache, and there is more than one data whose priority is lower than the priority of the first side row data, the first terminal uses the first side The row data replaces the data with the lowest priority stored in the cache.
  • the first terminal device determines to replace the data stored in the cache with the first side row data based on priority, it may not be restricted by the first criterion. For example, when the first terminal device receives the first side row data and needs to store the first side row data in the cache, but there is no space to store the first side row data in the cache, the first terminal device According to the comparison result of the priority of the first side row data and the priority of the data stored in the cache, it is determined whether to replace the data stored in the cache. If the priority of the first side line data is higher than the priority of the data stored in the cache, the first terminal device replaces the data stored in the cache with the first side line data.
  • the first criterion includes at least one of the following:
  • the second threshold is the maximum number of transmissions of one transmission block.
  • the data stored in the cache is the second side row data
  • the first terminal device starts timing from the last time the second side row data is stored. If the number of time units of the second side row data stored in the cache is equal to If the sum of the number of received data exceeds the maximum number of transmissions corresponding to the data, it is considered that there will be no retransmission of the data later, and the buffer can be cleared.
  • the second threshold is the maximum number of transmissions of one transmission block.
  • the data stored in the cache is the second side row data
  • the first terminal device starts timing from the last time the second side row data was stored. If the number of time units of the second side row data stored in the cache exceeds the The maximum number of transmissions corresponding to the data, it is considered that there will be no retransmission of the data later, and the buffer can be cleared.
  • the second threshold is the maximum number of transmissions of one transmission block.
  • the data stored in the cache is the second side row data
  • the first terminal device starts timing when the second side row data is stored for the first time. If the number of time units of the second side row data stored in the cache exceeds For the maximum number of transmissions corresponding to the data, it is considered that there will be no retransmission of the data later, and the buffer can be cleared.
  • the first threshold is the number of time units corresponding to the time delay of the data stored in the buffer.
  • the data stored in the cache is the second side line data
  • the first terminal device starts timing from the first time the second side line data is stored. If the maximum delay corresponding to the data is 100ms, each timing unit is 1ms, when the timing exceeds the maximum delay of 100ms, the cache can be cleared or the data in the cache can be replaced with the first side line data.
  • the first threshold is the number of time units corresponding to the time delay of the data stored in the buffer.
  • the data stored in the cache is the second side row data
  • the first terminal device starts timing from the last time the second side row data is stored. If the maximum delay corresponding to the data is 100ms, each timing unit is 1ms , When the timing exceeds the maximum delay of 100ms, the cache can be cleared or the data in the cache can be replaced with the first side row data.
  • the timer when the first terminal device stores data in the buffer, the timer will be restarted.
  • the first terminal device receives the second side line data, and stores the second side line data in the buffer, and then starts a timer, when the first terminal device receives the second side line data
  • the retransmitted data will be stored in the buffer, and the timer will be restarted at this time.
  • the first terminal device obtains the first parameter M and the second parameter K, and determines the first threshold according to the M and the K, where M and K are positive integers.
  • first parameter M and the second parameter K may be determined in the following manners:
  • the first parameter M is the number of time unit intervals; the number of time unit intervals is determined according to at least one of the following information:
  • the time unit interval indication information indicated in the side control information received by the first terminal device is the time unit interval indication information indicated in the side control information received by the first terminal device
  • the time unit interval configured in the resource pool configuration information
  • Periodic parameters of the side-line feedback channel are Periodic parameters of the side-line feedback channel.
  • the first terminal device obtains the second parameter K in the following manner:
  • the first terminal device obtains the second parameter K according to the resource pool configuration information, or,
  • the first terminal device obtains the second parameter K according to network configuration information, or,
  • the first terminal device obtains the second parameter K according to priority information, or,
  • the first terminal device obtains the second parameter K according to the time delay information, or,
  • the first terminal device obtains the second parameter K according to CBR, or,
  • the first terminal device obtains the second parameter K according to the period parameter of the sideline feedback channel.
  • time unit in the above solution of the present application may be a time slot, a subframe, or a fixed time interval, or an absolute time.
  • the first terminal device receives the first side row data and needs to store the first side row data in a cache.
  • the first terminal device will determine whether the storage time of the data stored in the cache is The first threshold (or the second threshold) has been exceeded. If it exceeds, the first terminal device replaces the data stored in the buffer with the first side line data. If more than one piece of data in the buffer has been stored for a time that exceeds the first threshold (or exceeds the second threshold), the first terminal device may replace the first threshold (or the second threshold) with the first side line data. ) The data with the most time. Alternatively, the first terminal device may replace the data with the lowest priority among the multiple data exceeding the first threshold (or the second threshold) with the first side row data.
  • FIG. 7 is a schematic structural composition diagram of a cache processing apparatus provided by an embodiment of the application, which is applied to a first terminal device. As shown in FIG. 7, the cache processing apparatus includes:
  • the receiving unit 701 is configured to receive the first side row data
  • the processing unit 702 is configured to determine to clear or use the buffer according to a first criterion, where the first side row data is the first transmission or retransmission of a transmission block.
  • processing unit 702 is configured to:
  • the first criterion includes at least one of the following:
  • the number of time units of data storage in the cache exceeds a first threshold
  • the sum of the number of time units of data storage in the buffer and the number of transmissions of the transmission block corresponding to the first side line data received by the receiving unit exceeds a second threshold.
  • the second threshold is the maximum number of transmissions of a transmission block.
  • the first threshold is the number of time units corresponding to the time delay of the data stored in the buffer.
  • the device further includes:
  • An obtaining unit (not shown in the figure) is used to obtain a first parameter M and a second parameter K, and determine the first threshold according to the M and the K, where M and K are positive integers.
  • the first parameter M is the number of time unit intervals; the number of time unit intervals is determined according to at least one of the following information:
  • the time unit interval indication information indicated in the side control information received by the first terminal device is the time unit interval indication information indicated in the side control information received by the first terminal device
  • the time unit interval configured in the resource pool configuration information
  • Periodic parameters of the side-line feedback channel are Periodic parameters of the side-line feedback channel.
  • the acquiring unit is configured to:
  • the second parameter K is obtained according to the period parameter of the side-line feedback channel.
  • FIG. 8 is a schematic structural diagram of a communication device 800 provided by an embodiment of the present application.
  • the communication device may be a terminal device or a network device.
  • the communication device 800 shown in FIG. 8 includes a processor 810.
  • the processor 810 can call and run a computer program from a memory to implement the method in the embodiment of the present application.
  • the communication device 800 may further include a memory 820.
  • the processor 810 may call and run a computer program from the memory 820 to implement the method in the embodiment of the present application.
  • the memory 820 may be a separate device independent of the processor 810, or may be integrated in the processor 810.
  • the communication device 800 may further include a transceiver 830, and the processor 810 may control the transceiver 830 to communicate with other devices. Specifically, it may send information or data to other devices, or receive other devices. Information or data sent by the device.
  • the transceiver 830 may include a transmitter and a receiver.
  • the transceiver 830 may further include an antenna, and the number of antennas may be one or more.
  • the communication device 800 may specifically be a network device in an embodiment of the present application, and the communication device 800 may implement the corresponding process implemented by the network device in each method of the embodiment of the present application. For the sake of brevity, it will not be repeated here. .
  • the communication device 800 may specifically be a mobile terminal/terminal device of an embodiment of the present application, and the communication device 800 may implement the corresponding process implemented by the mobile terminal/terminal device in each method of the embodiment of the present application. For simplicity , I won’t repeat it here.
  • FIG. 9 is a schematic structural diagram of a chip of an embodiment of the present application.
  • the chip 900 shown in FIG. 9 includes a processor 910, and the processor 910 can call and run a computer program from the memory to implement the method in the embodiment of the present application.
  • the chip 900 may further include a memory 920.
  • the processor 910 can call and run a computer program from the memory 920 to implement the method in the embodiment of the present application.
  • the memory 920 may be a separate device independent of the processor 910, or may be integrated in the processor 910.
  • the chip 900 may further include an input interface 930.
  • the processor 910 can control the input interface 930 to communicate with other devices or chips, and specifically, can obtain information or data sent by other devices or chips.
  • the chip 900 may further include an output interface 940.
  • the processor 910 can control the output interface 940 to communicate with other devices or chips, and specifically, can output information or data to other devices or chips.
  • the chip can be applied to the network device in the embodiment of the present application, and the chip can implement the corresponding process implemented by the network device in each method of the embodiment of the present application.
  • the chip can implement the corresponding process implemented by the network device in each method of the embodiment of the present application.
  • the chip can be applied to the mobile terminal/terminal device in the embodiment of the present application, and the chip can implement the corresponding process implemented by the mobile terminal/terminal device in each method of the embodiment of the present application.
  • the chip can implement the corresponding process implemented by the mobile terminal/terminal device in each method of the embodiment of the present application.
  • the chip can implement the corresponding process implemented by the mobile terminal/terminal device in each method of the embodiment of the present application.
  • the chip mentioned in the embodiment of the present application may also be referred to as a system-level chip, a system-on-chip, a system-on-chip, or a system-on-chip.
  • FIG. 10 is a schematic block diagram of a communication system 1000 according to an embodiment of the present application. As shown in FIG. 10, the communication system 1000 includes a terminal device 1010 and a network device 1020.
  • the terminal device 1010 can be used to implement the corresponding function implemented by the terminal device in the above method
  • the network device 1020 can be used to implement the corresponding function implemented by the network device in the above method. For brevity, it will not be repeated here. .
  • the processor of the embodiment of the present application may be an integrated circuit chip with signal processing capability.
  • the steps of the foregoing method embodiments can be completed by hardware integrated logic circuits in the processor or instructions in the form of software.
  • the above-mentioned processor may be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (ASIC), a ready-made programmable gate array (Field Programmable Gate Array, FPGA) or other Programming logic devices, discrete gates or transistor logic devices, discrete hardware components.
  • DSP Digital Signal Processor
  • ASIC application specific integrated circuit
  • FPGA Field Programmable Gate Array
  • the methods, steps, and logical block diagrams disclosed in the embodiments of the present application can be implemented or executed.
  • the general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like.
  • the steps of the method disclosed in the embodiments of the present application can be directly embodied as being executed and completed by a hardware decoding processor, or executed and completed by a combination of hardware and software modules in the decoding processor.
  • the software module can 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 electrically erasable programmable memory, registers.
  • 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 in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory.
  • the 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), and electrically available Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory.
  • the volatile memory may be random access memory (Random Access Memory, RAM), which is used as an external cache.
  • RAM random access memory
  • SRAM static random access memory
  • DRAM dynamic random access memory
  • DRAM synchronous dynamic random access memory
  • DDR SDRAM Double Data Rate Synchronous Dynamic Random Access Memory
  • Enhanced SDRAM, ESDRAM Enhanced Synchronous Dynamic Random Access Memory
  • Synchronous Link Dynamic Random Access Memory Synchronous Link Dynamic Random Access Memory
  • DR RAM Direct Rambus RAM
  • the memory in the embodiment of the present application may also be static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), Synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection Dynamic random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM) and so on. That is to say, the memory in the embodiments of the present application is intended to include, but is not limited to, these and any other suitable types of memory.
  • the embodiment of the present application also provides a computer-readable storage medium for storing computer programs.
  • the computer-readable storage medium can be applied to the network device in the embodiment of the present application, and the computer program causes the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application.
  • the computer program causes the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application.
  • the computer-readable storage medium can be applied to the mobile terminal/terminal device in the embodiment of the present application, and the computer program causes the computer to execute the corresponding process implemented by the mobile terminal/terminal device in each method of the embodiment of the present application For the sake of brevity, I won’t repeat it here.
  • the embodiments of the present application also provide a computer program product, including computer program instructions.
  • the computer program product can be applied to the network device in the embodiment of the present application, and the computer program instructions cause the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application.
  • the computer program instructions cause the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application.
  • the computer program product can be applied to the mobile terminal/terminal device in the embodiment of the present application, and the computer program instructions cause the computer to execute the corresponding process implemented by the mobile terminal/terminal device in each method of the embodiment of the present application, For the sake of brevity, I will not repeat them here.
  • the embodiment of the present application also provides a computer program.
  • the computer program can be applied to the network device in the embodiment of the present application.
  • the computer program runs on the computer, it causes the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application.
  • I won’t repeat it here.
  • the computer program can be applied to the mobile terminal/terminal device in the embodiment of the present application.
  • the computer program runs on the computer, the computer executes each method in the embodiment of the present application. For the sake of brevity, the corresponding process will not be repeated here.
  • the disclosed system, device, and method may be implemented in other ways.
  • the device embodiments described above are merely illustrative, for example, the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components may be combined or It can be integrated into another system, or some features can be ignored or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
  • the functional units in the various embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium.
  • the technical solution of the present application essentially or the part that contributes to the existing technology 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 are used 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 methods described in the various embodiments of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory,) ROM, random access memory (Random Access Memory, RAM), magnetic disks or optical disks and other media that can store program codes. .

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

Des modes de réalisation de la présente application fournissent un procédé et un appareil permettant d'effacer la mémoire cache, et un procédé et un appareil de traitement de la mémoire cache, et un dispositif terminal. Le procédé consiste : à recevoir par un premier dispositif terminal, des premières informations d'indication, les premières informations d'indication étant utilisées pour déterminer un premier moment pour effacer une mémoire cache, la mémoire cache étant utilisée pour stocker des données de liaison latérale reçues par le premier dispositif terminal.
PCT/CN2019/113761 2019-10-12 2019-10-28 Procédé et dispositif permettant d'effacer la mémoire cache, et procédé et appareil de traitement de la mémoire cache, et dispositif terminal WO2021068301A1 (fr)

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