WO2021208048A1 - Procédé de transmission de données, équipement terminal et support de stockage - Google Patents

Procédé de transmission de données, équipement terminal et support de stockage Download PDF

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Publication number
WO2021208048A1
WO2021208048A1 PCT/CN2020/085220 CN2020085220W WO2021208048A1 WO 2021208048 A1 WO2021208048 A1 WO 2021208048A1 CN 2020085220 W CN2020085220 W CN 2020085220W WO 2021208048 A1 WO2021208048 A1 WO 2021208048A1
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WIPO (PCT)
Prior art keywords
terminal device
random access
storage unit
transmitted
data
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PCT/CN2020/085220
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English (en)
Chinese (zh)
Inventor
林雪
石聪
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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 PCT/CN2020/085220 priority Critical patent/WO2021208048A1/fr
Priority to CN202080098826.XA priority patent/CN115336369B/zh
Publication of WO2021208048A1 publication Critical patent/WO2021208048A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA

Definitions

  • This application relates to the field of wireless communication technology, and in particular to a data transmission method, terminal device and storage medium.
  • RACH Random Access Channel
  • PUSCH Physical Uplink Shared Channel
  • the embodiments of the present application provide a data transmission method, terminal device and storage medium, so that when the selected preamble is not associated with PUSCH resources, data can be effectively transmitted in the 2-step RACH.
  • an embodiment of the present application provides a data transmission method, including: if there is no valid uplink shared channel resource unit associated with the terminal equipment based on the preamble transmitted by the first type of random access, if the terminal equipment is based on The fallback instruction falls back from the first type of random access to the second type of random access, and if the second storage unit is empty, the terminal device determines the data to be transmitted based on the fallback instruction, or the The terminal device obtains the first data to be transmitted from the first storage unit; the first storage unit is used to store the load data included in the first message in the first type of random access, and the second storage unit is used to store Data corresponding to the third message in the second type of random access.
  • an embodiment of the present application provides a data transmission method, including: in the case that a terminal device selects a resource for transmitting a first message in the first type of random access, there is an effective uplink shared channel resource unit associated with the In the case of the preamble to be transmitted by the terminal device, if the third storage unit is empty, the terminal device determines the third data to be transmitted based on the effective uplink shared channel resource unit, or the terminal device obtains the third data from the fourth storage unit. Obtain the third data to be transmitted;
  • the third storage unit is used to store load data included in the first message in the first type of random access
  • the fourth storage unit is used to store data corresponding to the third message in the second type of random access.
  • an embodiment of the present application provides a terminal device, the terminal device includes: a first processing unit configured to have no valid uplink shared channel resource unit associated with the terminal device based on the first type of random access transmission preamble In the case of, if the terminal device falls back from the first type of random access to the second type of random access based on the fallback instruction, and if the second storage unit is empty, it is determined to be transmitted based on the fallback instruction , Or obtain the first data to be transmitted from the first storage unit;
  • the first storage unit is used to store load data included in the first message in the first type of random access
  • the second storage unit is used to store data corresponding to the third message in the second type of random access .
  • an embodiment of the present application provides a terminal device, the terminal device includes: a second processing unit configured to select a resource for transmitting the first message in the first type of random access when the terminal device In the case that the effective uplink shared channel resource unit is associated with the preamble to be transmitted by the terminal device, if the third storage unit is empty, the third data to be transmitted is determined based on the effective uplink shared channel resource unit, or from the fourth The storage unit obtains the third data to be transmitted;
  • the third storage unit is used to store load data included in the first message in the first type of random access
  • the fourth storage unit is used to store data corresponding to the third message in the second type of random access.
  • an embodiment of the present application provides a terminal device, including a processor and a memory for storing a computer program that can run on the processor, wherein the processor is used to execute the above-mentioned terminal when the computer program is running. The steps of the data transmission method performed by the device.
  • an embodiment of the present application provides a chip, including a processor, configured to call and run a computer program from a memory, so that a device installed with the chip executes the data transmission method performed by the above-mentioned terminal device.
  • an embodiment of the present application provides a storage medium that stores an executable program, and when the executable program is executed by a processor, the above-mentioned data transmission method executed by the terminal device is implemented.
  • an embodiment of the present application provides a computer program product, including computer program instructions, which cause a computer to execute the above-mentioned data transmission method executed by the terminal device.
  • an embodiment of the present application provides a computer program that enables a computer to execute the data transmission method executed by the above terminal device.
  • the data transmission method provided by the embodiment of the present application includes: in the case that there is no valid uplink shared channel resource unit associated with the preamble transmitted by the terminal device based on the first type of random access, if the terminal device is sent by the terminal device based on the back-off instruction The first type of random access falls back to the second type of random access, and if the second storage unit is empty, the terminal device determines the data to be transmitted based on the fallback instruction, or the terminal device receives data from the first The storage unit acquires the first data to be transmitted; the first storage unit is configured to store load data included in the first message in the first type of random access.
  • the terminal device can determine the first data to be transmitted, so that the terminal device can effectively transmit data, reduce the delay of random access, and improve The efficiency of random access.
  • FIG. 1 is a schematic diagram of the processing flow of the second type of random access in this application.
  • FIG. 2 is a schematic diagram of the processing flow of the first type of random access in this application.
  • Figure 3 is a schematic diagram of the mapping relationship between Preamble and PRU of the application
  • FIG. 4 is a schematic diagram of the composition structure of a communication system according to an embodiment of the application.
  • FIG. 5 is a schematic diagram of an optional processing flow of a data transmission method provided by an embodiment of the application.
  • FIG. 6 is a schematic diagram of another optional processing flow of the data transmission method provided by an embodiment of the application.
  • FIG. 7 is a schematic diagram of an optional composition structure of a terminal device provided by an embodiment of the application.
  • FIG. 8 is a schematic diagram of another optional composition structure of a terminal device provided by an embodiment of the application.
  • FIG. 9 is a schematic diagram of the hardware composition structure of a terminal device according to an embodiment of the application.
  • 5G Enhance Mobile Broadband
  • URLLC Ultra Reliable Low Latency Communications
  • mMTC Massive Machine Type Communication
  • eMBB still aims for users to obtain multimedia content, services and data, and its demand is growing very rapidly. Since eMBB may be deployed in different scenarios, such as indoors, urban areas, rural areas, etc., the capabilities and requirements of eMBB vary greatly in different scenarios. Therefore, it cannot be generalized and must be analyzed in detail in conjunction with specific deployment scenarios.
  • Typical applications of URLLC include: industrial automation, power automation, telemedicine operations (surgery) and traffic safety protection.
  • Typical features of mMTC include: high connection density, small data volume, delay-insensitive services, low-cost modules and long service life.
  • NR New Radio
  • the typical network coverage is wide-area LTE coverage and NR island coverage mode.
  • LTE systems are deployed in the frequency spectrum below 6GHz, there is very little spectrum below 6GHz that can be used for NR systems; therefore, NR systems must study spectrum applications above 6GHz.
  • high-frequency spectrum has limited coverage and signal Disadvantages of fast fading.
  • the NR system can also work independently.
  • the maximum channel bandwidth can be 400MHZ (wideband carrier). Compared with the maximum 20M bandwidth of the LTE system, the bandwidth of the NR system is very large.
  • RACH includes: the first type of random access and the second type of random access.
  • the first type of random access two information exchanges are required between the terminal device and the network device. Therefore, the first type of random access is also called two-step random access (2-steps RACH).
  • the second type of random access the terminal device and the network device need to perform 4 information exchanges; therefore, the second type of random access is also called 4-steps RACH.
  • random access includes contention-based random access and non-contention-based random access.
  • random access includes the first type of random access and the second type of random access. The following briefly describes the first type of random access and the second type of random access.
  • the processing flow of the second type of random access includes the following four steps:
  • Step S101 The terminal device sends a random access preamble (Preamble) to the network device through Msg1.
  • Preamble a random access preamble
  • the terminal device sends the selected Preamble on the selected PRACH time domain resource; the network device can estimate the uplink Timing and the size of the uplink authorization required for the terminal device to transmit Msg3 based on the Preamble.
  • Step S102 After detecting that a terminal device sends a Preamble, the network device sends a random access response (Random Access Response, RAR) message to the terminal device through Msg2 to inform the terminal device of the uplink resource information that can be used when sending Msg3.
  • RAR Random Access Response
  • the equipment allocates a temporary radio network temporary identity (RNTI) to provide time advance command for terminal equipment.
  • RNTI temporary radio network temporary identity
  • Step S103 After receiving the RAR message, the terminal device sends Msg3 in the uplink resource specified by the RAR message.
  • the message of Msg3 is mainly used to notify the network device of what event triggered the RACH process. For example, if it is an initial random access event, the terminal device ID and establishment cause will be carried in Msg3; if it is an RRC reestablishment event, the connected terminal device identification and establishment cause will be carried in Msg3.
  • Step S104 The network device sends Msg4 to the terminal device, and Msg4 includes a contention resolution message, and at the same time allocates uplink transmission resources for the terminal device.
  • the terminal device When the terminal device receives the Msg4 sent by the network device, it will detect whether the terminal device specific temporary identifier sent by the terminal device in Msg3 is included in the contention resolution message sent by the base station. If it is included, it indicates that the random access process of the terminal device is successful, otherwise it is considered random If the process fails, the terminal device needs to initiate the random access process again from the first step.
  • Msg4 Another function of Msg4 is to send a radio resource control (Radio Resource Control, RRC) configuration message to the terminal device.
  • RRC Radio Resource Control
  • the above-mentioned RACH process requires four information exchanges between the network equipment and the terminal equipment to complete, resulting in the time extension of the RACH process; in order to solve the problem of the time extension and the large signaling overhead of the RACH process, the first type of random access is proposed.
  • the processing flow of random access includes the following steps:
  • Step S201 The terminal device sends MsgA to the network device.
  • MsgA is composed of Preamble and payload.
  • the preamble is the same as the preamble in the second type of random access, and the preamble is transmitted on the PRACH resource;
  • the information carried in the payload is the same as the information in the Msg3 in the second type of random access, for example, when the RRC is in an idle state RRC signaling, and C-RNTI when RRC is in the connected state, the payload can be transmitted by PUSCH.
  • the results of the network device receiving MsgA may include the following two types: the first type, the network device successfully decodes one or more preambles; the second type, the network device successfully decodes one or more preambles and one or more payloads.
  • Step S202 The terminal device receives the MsgB sent by the network device.
  • MsgB includes the content of Msg2 and Msg4 in the second type of random access.
  • the terminal device If the terminal device receives a successful contention resolution indication issued by the network device, the terminal device ends the random access process. If the terminal device receives a fallback indication (fallback RAR) through MsgB, the terminal device performs Msg3 transmission in the second type of random access; that is, the terminal device falls back from the first type of random access to the second type of random access. If the Msg3 buffer (buffer) is empty, the terminal device obtains the Medium Access Control Protocol Data Unit (MAC PDU) from the Msg3 buffer, and stores the obtained MAC PDU in the Msg3 buffer.
  • fallback RAR fallback indication
  • the terminal device After the terminal device sends the Msg3 to the network device, the terminal device monitors the contention resolution result; if the contention resolution fails, the terminal device continues to try MsgA transmission in the first type of random access.
  • the network device can configure the terminal device with the maximum number of first-type random access attempts "N". After the terminal device attempts N first-type random access, the terminal device is The access is switched to the second type of random access, and the access attempt is continued.
  • the resources for random access include the PRACH used to transmit the Preamble and the PUSCH used to transmit the payload; the physical layer defines the relationship between the Preamble and the uplink shared channel resource unit (PUSCH Resource Unit, PRU)
  • PUSCH Resource Unit PRU
  • the mapping relationship between Preamble and PRU may have the following three situations: In the first case, both the Preamble and the PRU are valid; in the second case, the Preamble is valid and the PRU is invalid; and in the third case, the Preamble is invalid and the PRU is valid.
  • the terminal device can transmit both Preamble and PRU at the same time; for the second case, the terminal device can only transmit the Preamble; for the third case, since the terminal device cannot transmit the Preamble, nor can it transmit the PRU.
  • the terminal device when the terminal device selects resources, it does not consider whether the PRU associated with the Preamble is valid, and only needs to ensure that the valid PRACH and Preamble are selected.
  • the selected Preamble determines the uplink grant (UL grant) and hybrid automatic retransmission request (Hybrid Automatic) corresponding to the PRU associated with the selected Preamble. Repeat reQuest, HARQ) information. If there is no valid PRU associated with the Preamble at this time, the terminal equipment device cannot work according to the process defined by the existing protocol.
  • the terminal device instructs the physical layer to transmit the Preamble and payload; if there is no valid PRU associated with the Preamble at this time, the terminal device cannot instruct the physical layer to transmit the payload.
  • the MsgA resource selection process can be described as:
  • the MsgA transmission process can be described as:
  • the MsgA transmission process can be described as:
  • this application provides a data transmission method.
  • the technical solutions of the embodiments of this application can be applied to various communication systems, such as the global system of mobile communication (GSM) system, code division multiple access (code division multiple access, GSM) system, etc.
  • GSM global system of mobile communication
  • code division multiple access code division multiple access
  • CDMA compact code division multiple access
  • WCDMA wideband code division multiple access
  • GPRS general packet radio service
  • LTE long term evolution
  • TDD LTE time division duplex
  • LTE-A advanced long term evolution
  • NR new radio
  • WiMAX worldwide interoperability for microwave access
  • WLAN wireless local area networks
  • WiFi wireless fidelity
  • WiFi Next-generation communication systems or other communication systems, etc.
  • the network equipment involved in the embodiments of this application may be a common base station (such as a NodeB or eNB or gNB), a new radio controller (NR controller), a centralized network element (centralized unit), a new radio base station, Radio remote module, micro base station, relay, distributed unit, reception point (transmission reception point, TRP), transmission point (transmission point, TP), or any other equipment.
  • a common base station such as a NodeB or eNB or gNB
  • NR controller new radio controller
  • a centralized network element centralized unit
  • a new radio base station Radio remote module
  • micro base station relay, distributed unit, reception point (transmission reception point, TRP), transmission point (transmission point, TP), or any other equipment.
  • TRP transmission reception point
  • TP transmission point
  • the terminal device may be any terminal.
  • the terminal device may be a user equipment for machine-type communication. That is to say, the terminal equipment can also be referred to as user equipment UE, mobile station (mobile station, MS), mobile terminal (mobile terminal), terminal (terminal), etc., and the terminal device can be accessed via a radio access network.
  • network, RAN communicates with one or more core networks.
  • the terminal device can be a mobile phone (or called a "cellular" phone), a computer with a mobile terminal, etc., for example, the terminal device can also be a portable or pocket-sized , Handheld, computer built-in or vehicle-mounted mobile devices that exchange language and/or data with the wireless access network.
  • the terminal device may be a user equipment for machine-type communication. That is to say, the terminal equipment can also be referred to as user equipment UE, mobile station (mobile station, MS), mobile terminal (mobile terminal), terminal (terminal), etc., and the terminal device can be accessed via a radio access network.
  • network, RAN
  • network equipment and terminal equipment can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; they can also be deployed on water; they can also be deployed on airborne aircraft, balloons, and satellites.
  • the embodiments of the present application do not limit the application scenarios of network equipment and terminal equipment.
  • communication between network equipment and terminal equipment and between terminal equipment and terminal equipment can be carried out through licensed spectrum, or through unlicensed spectrum, or through licensed spectrum and terminal equipment at the same time. Unlicensed spectrum for communication.
  • Between network equipment and terminal equipment and between terminal equipment and terminal equipment can communicate through the frequency spectrum below 7 gigahertz (gigahertz, GHz), can also communicate through the frequency spectrum above 7 GHz, and can also use the frequency spectrum below 7 GHz and Communication is performed in the frequency spectrum above 7GHz.
  • the embodiment of the present application does not limit the spectrum resource used between the network device and the terminal device.
  • D2D device to device
  • M2M machine to machine
  • MTC machine type communication
  • V2V vehicle to vehicle
  • the communication system 100 applied in the embodiment of the present application is shown in FIG. 4.
  • the communication system 100 may include a network device 110, and the network device 110 may be a device that communicates with a terminal device 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 terminal devices located in the coverage area.
  • the network device 110 may be a base station (Base Transceiver Station, BTS) in a GSM system or a CDMA system, a base station (NodeB, NB) in a WCDMA system, or an evolved base station in an LTE system (Evolutional Node B, eNB or eNodeB), or the wireless controller in the Cloud Radio Access Network (CRAN), or the network equipment can be a mobile switching center, a relay station, an access point, a vehicle-mounted device, Wearable devices, hubs, switches, bridges, routers, network-side devices in 5G networks, or network devices in the future evolution of the Public Land Mobile Network (PLMN), etc.
  • BTS Base Transceiver Station
  • NodeB, NB base station
  • LTE Long Term Evolutional Node B
  • eNB evolved base station
  • CRAN Cloud Radio Access Network
  • the network equipment can be a mobile switching center, a relay station, an access point, a vehicle-mounted device, Wearable devices, hubs, switches
  • the communication system 100 also includes at least one terminal device 120 located within the coverage area of the network device 110.
  • the "terminal equipment” used here includes but is not limited to connection via wired lines, such as via Public Switched Telephone Networks (PSTN), 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 device that is set to receive/send communication signals; and/or Internet of Things (IoT) equipment.
  • a terminal device set to communicate via a wireless interface may be called a "wireless communication terminal", "wireless terminal” or "mobile terminal”.
  • Examples of 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 Other electronic devices that are connected to the Internet, Web browsers, notebooks, calendars, and/or Global Positioning System (GPS) transmitters.
  • Terminal equipment can refer to access terminals, user equipment (UE), user units, user stations, mobile stations, mobile stations, remote stations, remote terminals, mobile equipment, user terminals, terminals, wireless communication equipment, user agents, 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, terminal devices in 5G networks, or terminal devices in the future evolution of PLMN, etc.
  • SIP Session Initiation Protocol
  • WLL Wireless Local Loop
  • PDA Personal Digital Assistant
  • the terminal devices 120 may perform direct terminal connection (Device to Device, D2D) communication.
  • D2D Direct terminal connection
  • the 5G system or 5G network may also be referred to as NR system or NR network.
  • Figure 4 exemplarily shows one network device and two terminal devices.
  • the communication system 100 may include multiple network devices and the coverage of each network device may include other numbers of terminal devices. The embodiment does not limit 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 device 120 with communication functions, and the network device 110 and the terminal device 120 may be the specific devices described above, which will not be repeated here.
  • the communication device may also include other devices in the communication system 100, such as network controllers, mobility management entities and other network entities, which are not limited in the embodiment of the present application.
  • An optional processing procedure of the data transmission method provided in the embodiment of the present application, as shown in FIG. 5, includes the following steps:
  • Step S301 in the case that there is no valid uplink shared channel resource unit associated with the preamble transmitted by the terminal device based on the first type of random access, if the terminal device is returned by the first type of random access based on the fallback indication To the second type of random access, the terminal device determines the data to be transmitted based on the backoff instruction, or the terminal device obtains the first data to be transmitted from the first storage unit.
  • the first type of random access may be a 2-step RACH
  • the second type of random access may be a 4-step RACH.
  • the terminal device there is no valid PRU-associated terminal device based on the preamble transmitted by the first type of random access, which may refer to the mapping relationship between the Preamble and PRU defined by the physical layer, and the terminal device is based on the first type of random access.
  • the PRU corresponding to the preamble of the access transmission cannot be used.
  • the fallback indication may be a fallbackRAR sent by the network device to the terminal device after the terminal device sends the first message (such as MsgA in the 2-step RACH) to the network device.
  • the terminal device falls back from the first type of random access to the second type of random access based on the fallback instruction, which may be that the terminal device falls back from the 2-step RACH to the 4-step RACH based on the fallback instruction .
  • the terminal device falls back from the 2-step RACH to Msg3 in the 4-step RACH based on the back-off instruction; that is, the terminal device still performs the 2-step RACH, but after receiving the back-off instruction, the terminal device reports to the network device
  • the content of the sent message is the same as the content of Msg3 in the 4-step RACH.
  • the terminal device switches the random access type from the 2-step RACH to the 4-step RACH.
  • the terminal device determines the first data to be transmitted based on the UL grant indicated by the fallback instruction.
  • the terminal device regardless of whether the terminal device selects the resource for transmitting the first message (such as MsgA) in the first type of random access for the first time, as long as the first storage unit and the second storage unit are empty, the terminal device will The UL grant indicated by the fallback instruction constructs the first data to be transmitted.
  • the first data to be transmitted may be the first MAC PDU to be transmitted.
  • the terminal device obtains the first data to be transmitted from the first storage unit.
  • the terminal device may select a resource for transmitting the first message (such as MsgA) in the first type of random access for the non-first time.
  • the first data to be transmitted may be the first MAC PDU to be transmitted.
  • the first storage unit is used to store load data included in the first message in the first type of random access.
  • the first storage unit may be a MsgA buffer, which is used to store MsgA payload MAC PDU;
  • the second storage unit may be a Msg3 buffer, which is used to store Msg3 MAC PDU.
  • the first storage unit and the second storage unit may be located in a MAC entity.
  • the data transmission method may further include:
  • Step S302 The terminal device stores the first data to be transmitted in the second storage unit.
  • the data transmission method may further include:
  • Step S303 In the case that there is no valid uplink shared channel resource unit associated with the terminal device based on the preamble transmitted by the terminal device based on the first type of random access, if the terminal device does not receive the backoff instruction, Then the terminal device reselects the resource used to transmit the first message.
  • the terminal device re-selects the resource for transmitting the first message, which may be the terminal device re-selecting the MsgA resource in the first type of random access (2-step RACH) to perform the 2-step again RACH access attempt.
  • the data transmission method may further include:
  • Step S304 If the first storage unit is empty, the terminal device determines the second data to be transmitted based on the effective uplink shared channel resource unit, or the terminal device obtains the second data to be transmitted from the second storage unit. data.
  • the terminal device constructs the second MAC PDU to be transmitted based on the UL grant determined by the valid PRU.
  • the terminal device obtains the second MAC PDU to be transmitted from the second storage unit.
  • the terminal device stores the second data to be transmitted in the first storage unit.
  • the second data may be a second MAC PDU to be transmitted.
  • the method may further include:
  • Step S305 the terminal device instructs the physical layer to use the effective PRACH among the resources reselected by the terminal device to transmit the preamble to be transmitted; and/or, the terminal device instructs the physical layer to use the effective PRU to transmit the data. ⁇ Load data.
  • the payload data may be MsgA payload.
  • Another optional processing procedure of the data transmission method provided by the embodiment of the present application, as shown in FIG. 6, includes the following steps:
  • Step S401 In the case that the terminal device selects the resource for transmitting the first message in the first type of random access, and there is a valid uplink shared channel resource unit associated with the preamble to be transmitted by the terminal device, if the third If the storage unit is empty, the terminal device determines the third data to be transmitted based on the effective uplink shared channel resource unit, or the terminal device obtains the third data to be transmitted from the fourth storage unit.
  • the first type of random access may be a 2-step RACH
  • the first message may be MsgA in the 2-step RACH.
  • a valid PRU-associated terminal device is based on the preamble transmitted by the first type of random access, which may refer to the mapping relationship between the Preamble and PRU defined by the physical layer, and the terminal device is based on the first type of random access.
  • the PRU corresponding to the preamble of the incoming transmission can be used.
  • the third storage unit is used to store load data included in the first message in the first type of random access
  • the fourth storage unit is used to store the third type of random access in the second type of random access.
  • the data corresponding to the message may be a MsgA buffer, which is used to store MsgA payload MAC PDU
  • the fourth storage unit may be a Msg3 buffer, which is used to store Msg3 MAC PDU.
  • the third storage unit and the fourth storage unit may be located in a MAC entity.
  • the terminal device constructs the third MAC PDU to be transmitted based on the UL grant determined by the valid PRU.
  • the terminal device obtains the third MAC PDU to be transmitted from the fourth storage unit.
  • the data transmission method may further include:
  • Step S402 The terminal device stores the third data to be transmitted in the third storage unit.
  • the data transmission method may further include:
  • Step S403 The terminal device instructs the physical layer to use the effective PRACH among the resources reselected by the terminal device to transmit the preamble to be transmitted; and/or, the terminal device instructs the physical layer to use the effective PRU to transmit the load data.
  • step S401 to step S403 may be applicable to the scenario where the terminal device selects the resource for transmitting the first message in the first type of random access for the first time; that is, the data transmission method shown in step S401 to step S403
  • the data transmission method shown can be applied to scenarios where the terminal device is not selected for the first time to transmit the resources of MsgA in the 2-step RACH.
  • the data transmission method provided in the embodiments of the present application clarifies the data transmission behavior of the terminal device when there is no valid uplink shared channel resource unit associated with the terminal device based on the preamble transmitted by the first type of random access; In the case that there is a valid uplink shared channel resource unit associated with the preamble transmitted by the terminal device based on the first type of random access, if the terminal device falls back from the first type of random access to the second type based on the fallback indication In the case of random access and the second storage unit is empty, the terminal device can determine the first data to be transmitted, so that the terminal device can effectively transmit data, reduce the delay of random access, and improve the performance of random access. efficient.
  • the size of the sequence number of the above-mentioned processes does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic, and should not correspond to the embodiments of the present application.
  • the implementation process constitutes any limitation.
  • the related protocol of the 2-step RACH can be modified as follows:
  • MSGA transmission includes preamble transmission and PUSCH transmission
  • PREAMBLE_INDEX and PREAMBLE_RECEIVED_TARGET_POWER transmit random access preamble
  • an embodiment of the present application further provides a terminal device.
  • the composition structure of the terminal device is as shown in FIG. 7, and the terminal device 500 includes:
  • the first processing unit 501 is configured to: in the case that there is no valid uplink shared channel resource unit associated with the terminal equipment based on the preamble transmitted by the first type of random access, if the terminal equipment is based on the fallback indication, the first type of If the random access falls back to the second type of random access, the data to be transmitted is determined based on the fallback instruction, or the first data to be transmitted is obtained from the first storage unit;
  • the first storage unit is configured to store load data included in the first message in the first type of random access.
  • the first processing unit when the first storage unit is empty and the second storage unit is empty, the first processing unit is configured to determine the first to be transmitted based on the backout instruction. Data; the second storage unit is used to store data corresponding to the third message in the second type of random access.
  • the first processing unit 501 is configured to determine the first MAC PDU to be transmitted according to the uplink grant determined by the fallback instruction.
  • the first processing unit 501 is configured to obtain the first storage unit to be transmitted from the first storage unit when the first storage unit is not empty and the second storage unit is empty.
  • MAC PDU the second storage unit is used to store data corresponding to the third message in the second type of random access.
  • the terminal device 500 further includes: a second storage unit 502 configured to store the first data to be transmitted.
  • the first processing unit 501 is further configured to have no valid uplink shared channel resource unit associated with the preamble transmitted by the terminal device based on the first type of random access, if all If the terminal device does not receive the backoff instruction, it reselects the resource used to transmit the first message.
  • the first processing unit 501 is further configured to, in the case that a valid uplink shared channel resource unit is associated with the preamble to be transmitted by the terminal device among the resources reselected by the terminal device, If the first storage unit is empty, determine the second data to be transmitted based on the effective uplink shared channel resource unit, or obtain the second data to be transmitted from the second storage unit; the second storage unit uses To store the data corresponding to the third message in the second type of random access.
  • the first processing unit 501 is configured to determine the first to be transmitted based on the uplink grant determined by the effective uplink shared channel resource unit when the second storage unit is empty. Two MAC PDU.
  • the first processing unit 501 is configured to obtain the second MAC PDU to be transmitted from the second storage unit when the second storage unit is not empty.
  • the terminal device 500 further includes: a first storage unit 503 configured to store the second data to be transmitted.
  • the first processing unit 501 is further configured to instruct the physical layer to use a valid physical random access control channel among the resources reselected by the terminal device to transmit the preamble to be transmitted; and/or , Instruct the physical layer to use the effective uplink shared channel resource unit to transmit the load data.
  • the first processing unit 501 is further configured to instruct the physical layer to use the selected effective physical random access channel to transmit the preamble.
  • the first type of random access is two-step random access; and/or, the second type of random access is four-step random access.
  • an embodiment of the present application also provides another terminal device.
  • the composition structure of the terminal device is shown in FIG. 8, and the terminal device 600 includes:
  • the second processing unit 601 is configured to be a case where the terminal device selects the resource for transmitting the first message in the first type of random access, and there is a case where an effective uplink shared channel resource unit is associated with the preamble to be transmitted by the terminal device Next, if the third storage unit is empty, determine the third data to be transmitted based on the effective uplink shared channel resource unit, or obtain the third data to be transmitted from the fourth storage unit;
  • the third storage unit is used to store load data included in the first message in the first type of random access
  • the fourth storage unit is used to store data corresponding to the third message in the second type of random access.
  • the second processing unit 601 is configured to determine the first to be transmitted based on the uplink grant determined by the effective uplink shared channel resource unit when the fourth storage unit is empty. Three MAC PDU.
  • the second processing unit 601 is configured to obtain the third MAC PDU to be transmitted from the fourth storage unit when the fourth storage unit is not empty.
  • the terminal device 600 further includes:
  • the third storage unit 602 is configured to store the third data to be transmitted.
  • the second processing unit 601 is further configured to instruct the physical layer to use a valid physical random access control channel among the resources reselected by the terminal device to transmit the preamble to be transmitted; and/or , Instruct the physical layer to use the effective uplink shared channel resource unit to transmit the load data.
  • the effective uplink shared channel resource unit includes: an effective uplink shared channel resource unit associated with the preamble to be transmitted.
  • the first type of random access is two-step random access
  • the second type of random access is four-step random access.
  • An embodiment of the present application also provides a terminal device, including a processor and a memory for storing a computer program that can run on the processor, wherein the processor is used to execute the above-mentioned terminal device when the computer program is running.
  • the steps of the data transfer method are described in detail below.
  • An embodiment of the present application also provides a chip, including a processor, configured to call and run a computer program from a memory, so that a device installed with the chip executes the data transmission method performed by the terminal device.
  • the embodiment of the present application further provides a storage medium storing an executable program, and the executable program is executed by a processor to implement the data transmission method executed by the terminal device.
  • the embodiments of the present application also provide a computer program product, including computer program instructions, which cause a computer to execute the data transmission method executed by the above-mentioned terminal device.
  • An embodiment of the present application also provides a computer program that enables a computer to execute the data transmission method executed by the above-mentioned terminal device.
  • FIG. 9 is a schematic diagram of the hardware composition structure of a terminal device according to an embodiment of the present application.
  • the terminal device 700 includes: at least one processor 701, a memory 702, and at least one network interface 704.
  • the various components in the terminal device 700 are coupled together through the bus system 705.
  • the bus system 705 is used to implement connection and communication between these components.
  • the bus system 705 also includes a power bus, a control bus, and a status signal bus.
  • various buses are marked as the bus system 705 in FIG. 9.
  • the memory 702 may be a volatile memory or a non-volatile memory, and may also include both volatile and non-volatile memory.
  • non-volatile memory can be ROM, Programmable Read-Only Memory (PROM), Erasable Programmable Read-Only Memory (EPROM), and electrically erasable Programmable read-only memory (EEPROM, Electrically Erasable Programmable Read-Only Memory), magnetic random access memory (FRAM, ferromagnetic random access memory), flash memory (Flash Memory), magnetic surface memory, optical disk, or CD-ROM (CD) -ROM, Compact Disc Read-Only Memory); Magnetic surface memory can be disk storage or tape storage.
  • the volatile memory may be a random access memory (RAM, Random Access Memory), which is used as an external cache.
  • RAM random access memory
  • SRAM static random access memory
  • SSRAM synchronous static random access memory
  • Synchronous Static Random Access Memory Synchronous Static Random Access Memory
  • DRAM Dynamic Random Access Memory
  • SDRAM Synchronous Dynamic Random Access Memory
  • DDRSDRAM Double Data Rate Synchronous Dynamic Random Access Memory
  • ESDRAM Enhanced Synchronous Dynamic Random Access Memory
  • SLDRAM synchronous connection dynamic random access memory
  • DRRAM Direct Rambus Random Access Memory
  • the memory 702 described in the embodiment of the present application is intended to include, but is not limited to, these and any other suitable types of memory.
  • the memory 702 in the embodiment of the present application is used to store various types of data to support the operation of the terminal device 700. Examples of these data include: any computer program used to operate on the terminal device 700, such as an application program 7022.
  • the program for implementing the method of the embodiment of the present application may be included in the application program 7022.
  • the method disclosed in the foregoing embodiment of the present application may be applied to the processor 701 or implemented by the processor 701.
  • the processor 701 may be an integrated circuit chip with signal processing capabilities. In the implementation process, the steps of the foregoing method can be completed by an integrated logic circuit of hardware in the processor 701 or instructions in the form of software.
  • the aforementioned processor 701 may be a general-purpose processor, a digital signal processor (DSP, Digital Signal Processor), or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, and the like.
  • the processor 701 may implement or execute the methods, steps, and logical block diagrams disclosed in the embodiments of the present application.
  • the general-purpose processor may be a microprocessor or any conventional processor or the like.
  • the steps of the method disclosed in the embodiments of the present application may 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 may be located in a storage medium, and the storage medium is located in the memory 702.
  • the processor 701 reads the information in the memory 702 and completes the steps of the foregoing method in combination with its hardware.
  • the terminal device 700 may be configured by one or more application specific integrated circuits (ASIC, Application Specific Integrated Circuit), DSP, programmable logic device (PLD, Programmable Logic Device), and complex programmable logic device (CPLD). , Complex Programmable Logic Device), FPGA, general-purpose processor, controller, MCU, MPU, or other electronic components to implement the foregoing method.
  • ASIC Application Specific Integrated Circuit
  • DSP digital signal processor
  • PLD programmable logic device
  • CPLD complex programmable logic device
  • FPGA field-programmable logic device
  • controller MCU
  • MPU MPU
  • These computer program instructions can also be stored in a computer-readable memory that can guide a computer or other programmable data processing equipment to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction device.
  • the device implements the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.
  • These computer program instructions can also be loaded on a computer or other programmable data processing equipment, so that a series of operation steps are executed on the computer or other programmable equipment to produce computer-implemented processing, so as to execute on the computer or other programmable equipment.
  • the instructions provide steps for implementing the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé de transmission de données, comprenant les étapes suivantes : lorsqu'il n'y a pas d'unité de ressource de canal partagé de liaison montante efficace associée à un préambule transmis par un équipement terminal sur la base d'un accès aléatoire de premier type, si l"équipement terminal retourne à un accès aléatoire de second type à partir de l'accès aléatoire de premier type sur la base d'une instruction de retour, l'équipement terminal détermine, sur la base de l'instruction de retour, les données à transmettre, ou l'équipement terminal obtient auprès d'une première unité de stockage des premières données à transmettre, la première unité de stockage étant utilisée pour stocker des données de charge incluses dans un premier message dans l'accès aléatoire de premier type. L'invention concerne également un autre procédé de transmission de données, un équipement terminal et un support de stockage.
PCT/CN2020/085220 2020-04-16 2020-04-16 Procédé de transmission de données, équipement terminal et support de stockage WO2021208048A1 (fr)

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CN202080098826.XA CN115336369B (zh) 2020-04-16 2020-04-16 一种数据传输方法、终端设备及存储介质

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