WO2022067614A1 - Procédé de communication sans fil, dispositif terminal et dispositif de réseau - Google Patents

Procédé de communication sans fil, dispositif terminal et dispositif de réseau Download PDF

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Publication number
WO2022067614A1
WO2022067614A1 PCT/CN2020/119192 CN2020119192W WO2022067614A1 WO 2022067614 A1 WO2022067614 A1 WO 2022067614A1 CN 2020119192 W CN2020119192 W CN 2020119192W WO 2022067614 A1 WO2022067614 A1 WO 2022067614A1
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Prior art keywords
random access
terminal device
access type
contention
logical channel
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PCT/CN2020/119192
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English (en)
Chinese (zh)
Inventor
于新磊
李海涛
胡奕
卢前溪
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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 CN202080103164.0A priority Critical patent/CN115843464A/zh
Priority to PCT/CN2020/119192 priority patent/WO2022067614A1/fr
Publication of WO2022067614A1 publication Critical patent/WO2022067614A1/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

  • the embodiments of the present application relate to the field of communication, and more particularly, to a wireless communication method, terminal device, and network device.
  • contention-based random access includes: contention-based four-step random access and contention-based two-step random access.
  • the terminal equipment must first select the random access type before performing random access.
  • the terminal equipment selects the random access type based on the reference signal received power (Reference Signal Received Power, RSRP) measurement. input type.
  • RSRP Reference Signal Received Power
  • Non-Terrestrial Networks due to the long distance between the satellite and the terrestrial gateway and terminal equipment, the interaction delay of the random access process of the terminal equipment is more prominent, and the use of two-step random access can effectively Reduce network latency.
  • the "near-far effect" is not obvious, that is, because the network equipment is far away from each terminal equipment, the RSRP difference measured by the terminal equipment at different locations is not obvious. Based on this, if the NR system is still used The method of determining the random access type in the above-mentioned method makes it difficult to determine the random access type, thereby reducing the reliability of random access.
  • the embodiments of the present application provide a wireless communication method, a terminal device, and a network device, so that the random access type of the terminal device can be determined, thereby improving the reliability of random access.
  • a wireless communication method including: a terminal device acquiring first configuration information of the terminal device, where the first configuration information is used to determine a first random access type of the terminal device; type for random access.
  • a wireless communication method including: a network device sending first configuration information of the terminal device to a terminal device, where the first configuration information is used to determine a first random access type of the terminal device.
  • a terminal device for executing the method in the above-mentioned first aspect or each implementation manner thereof.
  • the terminal device includes a functional module for executing the method in the above-mentioned first aspect or each implementation manner thereof.
  • a network device for executing the method in the second aspect or each of its implementations.
  • the network device includes functional modules for executing the methods in the second aspect or the respective implementation manners thereof.
  • a terminal device including a processor and a memory.
  • the memory is used for storing a computer program
  • the processor is used for calling and running the computer program stored in the memory to execute the method in the above-mentioned first aspect or each implementation manner thereof.
  • a network device including a processor and a memory.
  • the memory is used to store a computer program
  • the processor is used to call and run the computer program stored in the memory to execute the method in the second aspect or each of its implementations.
  • an apparatus for implementing the method in any one of the above-mentioned first aspect to the second aspect or each implementation manner thereof.
  • the apparatus includes: a processor for invoking and running a computer program from a memory, so that a device installed with the apparatus executes the method in any one of the above-mentioned first aspect to the second aspect or each of its implementations .
  • a computer-readable storage medium for storing a computer program, and the computer program causes a computer to execute the method in any one of the above-mentioned first aspect to the second aspect or each implementation manner thereof.
  • a computer program product comprising computer program instructions, the computer program instructions cause a computer to execute the method in any one of the above-mentioned first to second aspects or the implementations thereof.
  • a computer program which, when run on a computer, causes the computer to perform the method of any one of the above-mentioned first to second aspects or each of the implementations thereof.
  • the terminal device can determine the first random access type of the terminal device according to the first configuration information, because the network device either directly carries the first random access type in the first configuration information, or the terminal device uses the first random access type according to the first configuration information.
  • the first random access type is determined by the logical channel list, the second logical channel list, any one of the above-mentioned correspondences, and the logical channel where the BSR triggered by the uplink data of the terminal device is located. Therefore, this method may not depend on the measurement of the terminal device.
  • the RSRP is not only independent of the RSRP measured by the terminal equipment, that is to say, even if the "near-far effect" is not obvious in the NTN system, it will not lead to the situation that the first random access type cannot be determined, thereby improving the random access type.
  • the reliability of the access is improved, and the two-step random access can be effectively used to reduce the access delay.
  • FIG. 1A is a schematic diagram of the architecture of a communication system provided by an embodiment of the present application.
  • FIG. 1B is a schematic structural diagram of another communication system provided by an embodiment of the present application.
  • Fig. 2 is the flow interaction diagram of the four-step random access process based on contention
  • Fig. 3 is the flow interaction diagram of the four-step random access process based on non-contention
  • FIG. 4A is a flow interaction diagram of a contention-based two-step random access procedure
  • FIG. 4B is a flow interaction diagram of a two-step random access process based on non-contention
  • Figure 5 is a schematic diagram of the "near-far effect" in the NR system
  • Figure 6 is a schematic diagram of the "near-far effect" in the NTN system
  • FIG. 7 is an interaction flowchart of a wireless communication method provided by an embodiment of the present application.
  • FIG. 8 shows a schematic block diagram of a terminal device 800 according to an embodiment of the present application.
  • FIG. 9 shows a schematic block diagram of a network device 900 according to an embodiment of the present application.
  • FIG. 10 is a schematic structural diagram of a communication device 1000 provided by an embodiment of the present application.
  • FIG. 11 is a schematic structural diagram of a device according to an embodiment of the present application.
  • FIG. 12 is a schematic block diagram of a communication system 1200 provided by an embodiment of the present application.
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access
  • CDMA Wideband Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • LTE-A Advanced Long Term Evolution
  • NR system evolution system of NR system, LTE (LTE-based access to unlicensed spectrum, LTE-U) system on unlicensed spectrum, NR (NR-based access to unlicensed spectrum, NR-U) on unlicensed spectrum system, NTN system, Universal Mobile Telecommunication System (UMTS), Wireless Local Area Networks (WLAN), Wireless Fidelity (WiFi), 5th-Generation (5G) systems or other communication systems, etc.
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access
  • CDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • LTE-A Advanced Long Term Evolution
  • LTE-U Advanced Long Term Evolution
  • NR system evolution system of
  • the communication system in this embodiment of the present application may be applied to a carrier aggregation (Carrier Aggregation, CA) scenario, a dual connectivity (Dual Connectivity, DC) scenario, or a standalone (Standalone, SA) distribution. web scene.
  • Carrier Aggregation, CA Carrier Aggregation, CA
  • DC Dual Connectivity
  • SA standalone
  • the embodiments of the present application may be applied to unlicensed spectrum, and may also be applied to licensed spectrum.
  • unlicensed spectrum can also be considered as shared spectrum
  • licensed spectrum can also be considered as non-shared spectrum.
  • the embodiments of the present application may be applied to an NTN system or a terrestrial communication network (Terrestrial Networks, TN) system.
  • NTN Global System for Mobile communications
  • TN Terrestrial Networks
  • terminal equipment may also be referred to as user equipment (User Equipment, UE), access terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device, etc.
  • UE User Equipment
  • access terminal subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device, etc.
  • the terminal device can be a station (STAION, ST) in the WLAN, can be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a personal digital processing (Personal Digital Assistant, PDA) devices, handheld devices with wireless communication capabilities, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, and next-generation communication systems, such as terminal devices in NR networks or Terminal equipment in the future evolved Public Land Mobile Network (Public Land Mobile Network, PLMN) network, etc.
  • STAION, ST in the WLAN
  • SIP Session Initiation Protocol
  • WLL Wireless Local Loop
  • PDA Personal Digital Assistant
  • the terminal device can be deployed on land, including indoor or outdoor, handheld, wearable, or vehicle-mounted; it can also be deployed on water (such as ships, etc.); it can also be deployed in the air (such as airplanes, balloons, and satellites) superior).
  • the terminal device may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with a wireless transceiver function, a virtual reality (virtual reality, VR for short) terminal device, an augmented reality (AR for short) ) terminal equipment, wireless terminal in industrial control, in-vehicle terminal equipment, wireless terminal in self driving, wireless terminal equipment in remote medical, smart grid wireless terminal equipment, wireless terminal equipment in transportation safety, wireless terminal equipment in smart city, wireless terminal equipment in smart home, wearable terminal equipment, etc.
  • a virtual reality virtual reality, VR for short
  • AR augmented reality
  • the terminal equipment involved in the embodiments of this application may also be referred to as terminal, user equipment (UE), access terminal equipment, vehicle-mounted terminal, industrial control terminal, UE unit, UE station, mobile station, mobile station, and remote station , remote terminal equipment, mobile equipment, UE terminal equipment, wireless communication equipment, UE proxy or UE device, etc.
  • Terminal devices can also be stationary or mobile.
  • the terminal device may also be a wearable device.
  • Wearable devices can also be called wearable smart devices, which are the general term for the intelligent design of daily wear and the development of wearable devices using wearable technology, such as glasses, gloves, watches, clothing and shoes.
  • a wearable device is a portable device that is worn directly on the body or integrated into the user's clothing or accessories. Wearable device is not only a hardware device, but also realizes powerful functions through software support, data interaction, and cloud interaction.
  • wearable smart devices include full-featured, large-scale, complete or partial functions without relying on smart phones, such as smart watches or smart glasses, and only focus on a certain type of application function, which needs to cooperate with other devices such as smart phones.
  • a network device may be a device used to communicate with mobile devices.
  • the network device can be an access point (Access Point, AP) in WLAN, a base station (Base Transceiver Station, BTS) in GSM or CDMA, a base station (NodeB, NB) in WCDMA, or a base station in LTE Evolved base station (Evolutional Node B, eNB or eNodeB), or relay station or access point, or in-vehicle equipment, wearable equipment and network equipment (gNB) in the NR network or network equipment in the future evolved PLMN network, etc.
  • Access Point Access Point
  • BTS Base Transceiver Station
  • NodeB, NB base station
  • LTE Evolved base station Evolved base station
  • gNB wearable equipment and network equipment
  • the network device may have mobile characteristics, eg, the network device may be a mobile device.
  • the network device may be a satellite or a balloon station.
  • the satellite may be a low earth orbit (LEO) satellite, a medium earth orbit (MEO) satellite, a geostationary earth orbit (GEO) satellite, a High Elliptical Orbit (HEO) ) satellite etc.
  • the network device may also be a base station set in a location such as land or water.
  • a network device may provide services for a cell, and a terminal device communicates with the network device through transmission resources (for example, frequency domain resources, or spectrum resources) used by the cell, and the cell may be a network device (
  • the cell can belong to the macro base station, or it can belong to the base station corresponding to the small cell (Small cell).
  • Pico cell Femto cell (Femto cell), etc.
  • These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services.
  • FIG. 1A is a schematic structural diagram of a communication system provided by an embodiment of the present application.
  • a terminal device 1101 and a satellite 1102 are included, and wireless communication can be performed between the terminal device 1101 and the satellite 1102 .
  • the network formed between the terminal device 1101 and the satellite 1102 may also be referred to as NTN.
  • the satellite 1102 can function as a base station, and the terminal device 1101 and the satellite 1102 can communicate directly. Under the system architecture, satellite 1102 may be referred to as a network device.
  • the communication system may include multiple network devices 1102, and the coverage of each network device 1102 may include other numbers of terminal devices, which are not limited in this embodiment of the present application.
  • FIG. 1B is a schematic structural diagram of another communication system provided by an embodiment of the present application.
  • a terminal device 1201 including a terminal device 1201 , a satellite 1202 and a base station 1203 , the terminal device 1201 and the satellite 1202 can communicate wirelessly, and the satellite 1202 and the base station 1203 can communicate.
  • the network formed between the terminal device 1201, the satellite 1202 and the base station 1203 may also be referred to as NTN.
  • the satellite 1202 may not have the function of the base station, and the communication between the terminal device 1201 and the base station 1203 needs to be relayed through the satellite 1202 .
  • the base station 1203 may be referred to as a network device.
  • the communication system may include multiple network devices 1203, and the coverage of each network device 1203 may include other numbers of terminal devices, which are not limited in this embodiment of the present application.
  • FIG. 1A-FIG. 1B only illustrate the system to which the present application applies.
  • the methods shown in the embodiments of the present application may also be applied to other systems, such as a 5G communication system, an LTE communication system, etc. , which is not specifically limited in the embodiments of the present application.
  • the wireless communication system shown in FIG. 1A-FIG. 1B may further include other network entities such as a mobility management entity (Mobility Management Entity, MME), an access and mobility management function (Access and Mobility Management Function, AMF) and the like , which is not limited in the embodiments of the present application.
  • MME Mobility Management Entity
  • AMF Access and Mobility Management Function
  • corresponding may indicate that there is a direct or indirect corresponding relationship between the two, or may indicate that there is an associated relationship between the two, or indicate and be instructed, configure and be instructed configuration, etc.
  • the random access process is mainly triggered by the following events:
  • Initial access The terminal device goes from a radio resource control (Radio Resource Control, RRC) idle state (RRC_IDLE) to an RRC connected state (RRC_CONNECTED).
  • RRC Radio Resource Control
  • downlink (Downlink, DL) data arrives, and at this time, the uplink (Uplink, UL) is in an out-of-sync state.
  • UL data arrives, and there is no available physical uplink control channel (Physical Uplink Control Channel, PUCCH) resource for Scheduling Request (Scheduling Request, SR) transmission.
  • PUCCH Physical Uplink Control Channel
  • SR Scheduling Request
  • the terminal device that is already in the uplink synchronization state can be allowed to use the random access channel (Random Access Channel, RACH) to replace the role of the SR.
  • RACH Random Access Channel
  • the terminal device requests other system information (Other System Information, OSI).
  • OSI Operating System Information
  • the following two random access modes are mainly supported, a contention-based random access mode and a non-contention-based random access mode.
  • FIG. 2 is a flow interaction diagram of a contention-based four-step random access procedure.
  • the random access procedure may include the following four steps:
  • the terminal device sends Msg 1 to the base station to tell the network device that the terminal device has initiated a random access request, and the Msg 1 carries a random access preamble (Random Access Preamble, RAP), or is called a random access preamble sequence, preamble sequence, preamble, etc.
  • RAP Random Access Preamble
  • Msg 1 can also be used for network equipment to estimate the transmission delay between itself and the terminal equipment and to calibrate the uplink time accordingly.
  • the terminal device selects a preamble index (index) and a PRACH resource for sending the preamble; then the terminal device transmits the preamble on the PRACH.
  • the network device will notify all terminal devices by broadcasting a system information system information block (System Information Block, SIB) on which time-frequency resources are allowed to transmit the preamble, for example, SIB1.
  • SIB System Information Block
  • the network device After receiving the Msg 1 sent by the terminal device, the network device sends Msg 2, that is, a random access response (Random Access Response, RAR) message to the terminal device.
  • the Msg 2 can carry, for example, a time advance (Time Advance, TA), an uplink grant instruction such as the configuration of uplink resources, and a temporary cell wireless network temporary identity (Temporary Cell-Radio Network Temporary Identity, TC-RNTI) and the like.
  • TA Time Advance
  • TC-RNTI Temporary Cell-Radio Network Temporary Identity
  • the terminal device monitors the Physical Downlink Control Channel (PDCCH) within the random access response time window (RAR window) to receive the RAR message replied by the network device.
  • the RAR message may be descrambled using a corresponding random access radio network temporary identifier (Random Access Radio Network Temporary Identifier, RA-RNTI).
  • RA-RNTI Random Access Radio Network Temporary Identifier
  • the terminal device does not receive the RAR message replied by the network device within the RAR time window, it is considered that this random access procedure has failed.
  • the terminal device successfully receives a RAR message, and the preamble index (preamble index) carried in the RAR message is the same as the index of the preamble sent by the terminal device through Msg 1, it is considered that the RAR has been successfully received. At this time, the terminal device The device can then stop monitoring within the RAR time window.
  • Msg 2 may include RAR messages for multiple terminal devices, and the RAR message of each terminal device may include a random access preamble identifier (RAP Identify, RAPID) used by the terminal device, used for transmitting Msg 3 resource information, TA adjustment information, TC-RNTI, etc.
  • RAP Identify random access preamble identifier
  • RAPID random access preamble identifier
  • the terminal device After receiving the RAR message, the terminal device determines whether the RAR belongs to its own RAR message. For example, the terminal device can use the preamble identifier to check. After determining that it belongs to its own RAR message, the terminal device generates Msg 3 at the RRC layer. And send Msg 3 to the network device. The identification information of the terminal device needs to be carried.
  • Msg 3 in step 3 of the 4-step random access procedure may include different contents to perform scheduled transmission (Scheduled Transmission).
  • Msg 3 may include an RRC connection request (RRC Connection Request) generated by the RRC layer, which at least carries the non-access stratum (Non-Access Stratum, NAS) identification information of the terminal device, and may also carry For example, a Serving-Temporary Mobile Subscriber Identity (S-TMSI) or a random number of the terminal device.
  • RRC Connection Request RRC Connection Request
  • S-TMSI Serving-Temporary Mobile Subscriber Identity
  • Msg 3 may include an RRC connection re-establishment request (RRC Connection Re-establishment Request) generated by the RRC layer without carrying any NAS message, and may also carry, for example, a cell radio network temporary identity (Cell Radio Network Temporary) Identifier, C-RNTI) and protocol control information (Protocol Control Information, PCI) and so on.
  • RRC Connection Re-establishment Request RRC Connection Re-establishment Request
  • C-RNTI Cell Radio Network Temporary
  • PCI Protocol Control Information
  • Msg 3 may include an RRC handover complete message (RRC Handover Confirm) generated by the RRC layer and the C-RNTI of the terminal device, and may also carry, for example, a buffer status report (Buffer Status Report, BSR); for other triggers
  • RRC Handover Confirm RRC handover complete message
  • BSR Buffer Status Report
  • the network device sends Msg 4 to the terminal device, and the terminal device correctly receives the Msg 4 to complete the contention resolution (Contention Resolution).
  • the Msg 4 may carry the RRC connection establishment message.
  • the network device in the contention resolution mechanism will carry its own unique identification in Msg 3, such as C-RNTI or identification information from the core network (such as S-TMSI or a random number), the network device in the contention resolution mechanism will The unique identification of the terminal device is carried in Msg 4 to designate the terminal device that wins the competition. And other terminal devices that do not win in the contention resolution will re-initiate random access.
  • FIG. 3 is a flow interaction diagram of a non-contention-based four-step random access procedure.
  • the random access procedure may include the first two steps in FIG. 2 (ie, step 1 and step 2 in FIG. 2 ). in:
  • Step 1 the network device sends a random access preamble assignment (RA Preamble assignment) message to the terminal device.
  • RA Preamble assignment a random access preamble assignment
  • the terminal device sends Msg 1 to the base station to inform the network device that the terminal device has initiated a random access request, and the Msg 1 carries a random access preamble.
  • the network device After receiving the Msg 1 sent by the terminal device, the network device sends Msg 2, that is, the RAR message, to the terminal device.
  • the Msg 2 may carry, for example, TA information, uplink grant instructions such as uplink resource configuration, and information such as TC-RNTI.
  • the terminal device does not receive the RAR message replied by the network device within the RAR time window, it is considered that this random access procedure has failed. If the terminal device successfully receives a RAR message, and the index of the preamble carried in the RAR message is the same as the index of the preamble sent by the terminal device through Msg 1, it is considered that the RAR has been successfully received, and the terminal device can stop the RAR at this time. The message is monitored.
  • Msg 1 and Msg 2 in the non-contention random access process For details of Msg 1 and Msg 2 in the non-contention random access process, reference may be made to the foregoing description of Msg 1 and Msg 2 in the contention-based random access process, and for brevity, they will not be repeated here.
  • FIG. 4A is a flow interaction diagram of a two-step random access process based on contention.
  • the random access process may include:
  • MsgA includes: Preamble transmitted on PRACH and load information transmitted on Physical Uplink Shared Channel (PUSCH).
  • PUSCH Physical Uplink Shared Channel
  • the terminal device monitors the network side's response within the configured window, and if it receives an indication of successful contention resolution from the network, the terminal device ends the random access process.
  • FIG. 4B is a flowchart of a non-contention-based two-step random access process.
  • the random access process may include:
  • Step 1 the network device sends a random access preamble assignment (RA Preamble assignment) message to the terminal device.
  • RA Preamble assignment a random access preamble assignment
  • MsgA includes: Preamble transmitted on PRACH and load information transmitted on PUSCH.
  • the terminal device After MsgA is transmitted, the terminal device receives MsgB, that is, a random access response.
  • a terminal device selects a random access type based on RSRP measurements.
  • the terminal device uses two-step random access; otherwise, the terminal device uses four-step random access.
  • the “near-far effect” is evident in the NR system.
  • the “near-far effect” is not obvious in NTN. Based on this, if the method of determining the random access type in the NR system is still adopted, on the one hand, it is difficult to set an appropriate RSRP threshold for random access type selection.
  • the method of selecting the random access type based on RSRP measurement is likely to cause the terminal device to select an inappropriate random access type.
  • the choice is Two-step random access is used, but the two-step random access is unsuccessful after several attempts.
  • the method of selecting the random access type based on the RSRP measurement results in the situation that the random access type is difficult to determine, thereby reducing the random access reliability.
  • the present application can determine the random access type through the configuration information sent by the network device to the terminal device, and then realize the random access process.
  • FIG. 7 is an interaction flowchart of a wireless communication method provided by an embodiment of the present application. As shown in FIG. 7 , the method includes the following steps:
  • Step S710 The network device sends first configuration information to the terminal device, where the first configuration information is used to determine the first random access type of the terminal device.
  • Step S720 The terminal device performs random access according to the first random access type.
  • the first configuration information may include any of the following, but is not limited thereto:
  • the first logical channel list corresponding to the contention-based two-step random access mode indicates that there is a correspondence between the logical channel and the random access mode.
  • logical channel 1 corresponds to the contention-based two-step random access mode.
  • Access corresponds to contention-based four-step random access.
  • the random access modes corresponding to the logical channels in the first logical channel list are all two-step random access modes based on contention.
  • the second logical channel list corresponding to the contention-based four-step random access manner indicates that there is a correspondence between the logical channels and the random access manner.
  • the random access modes corresponding to the logical channels in the second logical channel list are all four-step random access modes based on contention.
  • the correspondence between the at least one logical channel and the at least one random access type may be that the at least one logical channel corresponds to a two-step random access mode based on contention, or the at least one logical channel corresponds to a contention-based random access mode.
  • the four-step random access mode, or a part of the logical channels in the at least one logical channel corresponds to the contention-based two-step random access mode, and the other part of the logical channels corresponds to the contention-based four-step random access mode.
  • This application does not limit the corresponding relationship here.
  • the first configuration information carries the first random access type.
  • the first random access type may be determined according to the capability of the terminal device.
  • the length of the first random access type carried in the first configuration information may be 1 bit, or may be other lengths, which are not limited in this application.
  • the capability of the terminal device can be measured by various software and hardware parameters of the terminal device, and the present application does not limit the software and hardware parameters here.
  • the first random access type may be a contention-based two-step random access type.
  • the first random access type may be a contention-based four-step random access type.
  • the capability level of the terminal device may be determined according to various software and hardware parameters of the terminal device, and the capability level has a corresponding relationship with the random access type. Therefore, the network device may also determine the first random access according to this correspondence. type. In a word, this application does not limit how to determine the first random access type according to the capability of the terminal device.
  • the first random The access type is a contention-based two-step random access type. Otherwise, the first random access type is a contention-based four-step random access type, that is, if the logical channel where the BSR triggered by the uplink data of the terminal device is located is not in the first logical channel list, the first random access type is Contention-based four-step random access type.
  • the first random access type is four-step contention-based Random access type. Otherwise, the first random access type is a contention-based two-step random access type, that is, if the logical channel where the BSR triggered by the uplink data of the terminal device is located is not in the second logical channel list, the first random access type is Contention-based two-step random access type.
  • the first random The access type is a contention-based two-step random access type.
  • the first configuration information includes: the first logical channel list and the second logical channel list, and the logical channel where the BSR triggered by the uplink data of the terminal device is located is in the second logical channel list
  • the first random access The type is a contention-based four-step random access type.
  • the first configuration information includes: a correspondence between at least one logical channel and at least one random access type.
  • the at least one logical channel includes the logical channel where the BSR triggered by the uplink data of the terminal device is located.
  • the first random access type is determined according to the logical channel and the corresponding relationship where the BSR triggered by the uplink data of the terminal device is located. For example: Table 1 shows the correspondence between at least one logical channel and at least one random access type.
  • the first random access type is a contention-based two-step random access type.
  • the above-mentioned first configuration information may also not include the first logical channel list, but may include the identifier of the first logical channel list.
  • the above-mentioned first configuration information may also not include the second logical channel list, but is an identifier that includes the second logical channel list.
  • the identifier length of the first logical channel list may be 1 bit, or may be other lengths, which is not limited in this application.
  • the identifier length of the second logical channel list may be 1 bit, or may be other lengths, which is not limited in this application.
  • the above-mentioned first configuration information may also include any combination of the following items: (1) The first random access type. (2) The first logical channel list corresponding to the contention-based two-step random access mode. (3) The second logical channel list corresponding to the contention-based four-step random access mode. (4) The first logical channel list corresponding to the contention-based two-step random access mode and the second logical channel list corresponding to the contention-based four-step random access mode. (5) The correspondence between at least one logical channel and at least one random access type.
  • the terminal device and the network device can negotiate which method to adopt to determine the first random access type, and this application does not limit how the terminal device and the network device negotiate.
  • the first random access type is a contention-based two-step random access type or a contention-based four-step random access type.
  • the first configuration information is carried in RRC signaling, for example: carried in signaling radio bearers (Signalling Radio Bearers, SRB), of course, the first configuration information can also be carried in other signaling, such as media access A control control unit (Media Access Control Control Element, MAC CE), which is not limited in this application.
  • SRB Signaling Radio Bearers
  • MAC CE Media Access Control Control Element
  • the above RRC signaling may be RRC reconfiguration signaling.
  • the network device may also send the contention-based two-step random access resource configuration and the contention-based four-step random access resource configuration to the terminal device.
  • the contention-based two-step random access resource configuration is the MsgA resource configuration of the contention-based two-step random access, including the MsgA RACH resource configuration and the MsgA PUSCH resource configuration.
  • contention-based four-step random access resource configuration is based on the contention-based four-step random access RACH resource configuration.
  • the situation that the first configuration information carries the first random access type can be applied to any random access process. Therefore, before performing step S720, the terminal device first determines whether it is configured with non-contention-based Random access resources. If the non-contention-based random access resource is configured, the terminal device can use the non-contention-based random access mode, that is, step S720 does not need to be performed. If the non-contention-based random access resource is configured, the terminal device can use In the contention random access mode, step S720 needs to be performed.
  • the first configuration information carries the above-mentioned first logical channel list, or carries the second logical channel list, or carries the first logical channel list and the second logical channel list, or at least one logical channel and at least one random access list.
  • Type correspondence That is, these are all related to logical channels, so these situations are related to uplink resource application, and uplink resource application does not involve the non-contention random access process, so the terminal device does not need to determine whether it is configured with non-contention-based random access resources.
  • the terminal device may be allowed to use the RACH to replace the role of the SR. That is, when the terminal device fails to request uplink resources through the BSR and SR, the terminal device performs random access according to the first random access type.
  • the failure of the terminal device to request uplink resources through BSR and SR is also described as SR request failure, and the SR request failure may be that there is no SR resource or the SR reaches the maximum number of retransmissions, but is not limited thereto.
  • the terminal device performs random access according to the first random access type, which may be implemented in any of the following manners, but is not limited to this:
  • the terminal device uses the random access mode corresponding to the first random access type to perform random access.
  • the terminal device performs random access according to the measured RSRP and the first random access type.
  • the terminal device uses the contention-based two-step random access type to perform random access. If the first random access type is the contention-based four-step random access type, the terminal device uses the contention-based four-step random access type to perform random access.
  • the contention-based two-step random access mode is used for random access. If the first random access type is the contention-based four-step random access type, or the measured RSRP is less than the RSRP threshold, the contention-based four-step random access mode is used for random access. or,
  • the contention-based two-step random access mode is used for random access. If the first random access type is the contention-based four-step random access type, or the measured RSRP is less than or equal to the RSRP threshold, the contention-based four-step random access mode is used for random access. or,
  • the contention-based four-step random access mode is used for random access. If the first random access type is the contention-based two-step random access type, or the measured RSRP is greater than the RSRP threshold, the contention-based two-step random access mode is used for random access. or,
  • the contention-based four-step random access mode is used for random access. If the first random access type is the contention-based two-step random access type, or the measured RSRP is greater than or equal to the RSRP threshold, the contention-based two-step random access mode is used for random access.
  • the above-mentioned RSRP threshold may be predefined by the network device or the terminal device, or obtained through negotiation by them, which is not limited in this application.
  • the terminal device selects one MsgA RACH resource and one MsgA RACH resource from the two-step random access MsgA resource pool configured by the network. PUSCH resource and send MsgA on the selected resource.
  • the terminal device selects a RACH resource from the RACH resource pool configured by the network for four-step random access, and selects a RACH resource in the selected resource. Send Msg1 on.
  • the terminal device can determine the first random access type of the terminal device according to the first configuration information, because the network device either directly carries the first random access type in the first configuration information, or the terminal device is The first random access type is determined according to the first logical channel list, the second logical channel list, any one of the above correspondences, and the logical channel where the BSR triggered by the uplink data of the terminal device is located.
  • this method may not depend on The RSRP measured by the terminal equipment or not only does not depend on the RSRP measured by the terminal equipment, that is to say, even if the "near-far effect" is not obvious in the NTN system, it will not lead to the situation that the first random access type cannot be determined, thereby improving the The reliability of random access is improved, and the two-step random access can be effectively used to reduce the access delay.
  • FIG. 8 shows a schematic block diagram of a terminal device 800 according to an embodiment of the present application.
  • the terminal device 800 includes: a communication unit 810 and a processing unit 820, wherein the communication unit 810 is used to obtain first configuration information of the terminal device, and the first configuration information is used to determine the first random connection of the terminal device. input type.
  • the processing unit 820 is configured to perform random access according to the first random access type.
  • the first configuration information includes: a first random access type.
  • the communication unit 810 is further configured to report the capability of the terminal device to the network device.
  • the capability of the terminal device is used to determine the first random access type.
  • the first configuration information includes: a first logical channel list corresponding to the contention-based two-step random access mode.
  • the first random access type is a contention-based two-step random access type. Otherwise, the first random access type is a contention-based four-step random access type.
  • the first configuration information includes: a second logical channel list corresponding to the contention-based four-step random access manner.
  • the first random access type is a contention-based four-step random access type. Otherwise, the first random access type is a contention-based two-step random access type.
  • the first configuration information includes: a first logical channel list corresponding to the contention-based two-step random access mode and a second logical channel list corresponding to the contention-based four-step random access mode.
  • the first random access type is a contention-based two-step random access type. If the logical channel where the BSR triggered by the uplink data of the terminal device is located is in the second logical channel list, the first random access type is a contention-based four-step random access type.
  • the first configuration information includes: a correspondence between at least one logical channel and at least one random access type.
  • the first random access type is determined according to the logical channel where the BSR triggered by the uplink data of the terminal device is located and the corresponding relationship.
  • the processing unit 820 is specifically configured to: perform random access by using a random access manner corresponding to the first random access type. Alternatively, random access is performed according to the measured RSRP and the first random access type.
  • the processing unit 820 is specifically configured to: if the first random access type is a contention-based two-step random access type, and the measured RSRP is greater than or equal to the RSRP threshold, adopt the contention-based two-step random access. random access. Otherwise, the contention-based four-step random access method is used for random access.
  • the processing unit 820 is specifically configured to: if the first random access type is a contention-based four-step random access type, and the measured RSRP is less than or equal to the RSRP threshold, adopt the contention-based four-step random access. random access. Otherwise, the contention-based two-step random access method is used for random access.
  • the processing unit 820 is specifically configured to: perform random access according to the first random access type when the terminal device fails to request the uplink resource through the BSR and SR.
  • the communication unit 810 is further configured to acquire the contention-based two-step random access resource configuration and the contention-based four-step random access resource configuration.
  • the first configuration information is carried in RRC signaling.
  • the first random access type is a contention-based two-step random access type or a contention-based four-step random access type.
  • the above-mentioned communication unit may be a communication interface or a transceiver, or an input/output interface of a communication chip or a system-on-chip.
  • the aforementioned processing unit may be one or more processors.
  • terminal device 800 may correspond to the terminal device in the method embodiment of the present application, and the above-mentioned and other operations and/or functions of the various units in the terminal device 800 are respectively for realizing the method shown in FIG. 7 .
  • the corresponding process of the terminal device in the above will not be repeated here.
  • FIG. 9 shows a schematic block diagram of a network device 900 according to an embodiment of the present application.
  • the network device 900 includes: a communication unit 910 configured to send first configuration information of the terminal device to the terminal device, where the first configuration information is used to determine the first random access type of the terminal device.
  • the first configuration information includes: a first random access type.
  • the communication unit 910 is further configured to acquire the capability of the terminal device.
  • the capability of the terminal device is used to determine the first random access type.
  • the first configuration information includes: a first logical channel list corresponding to the contention-based two-step random access mode.
  • the first random access type is a contention-based two-step random access type. Otherwise, the first random access type is a contention-based four-step random access type.
  • the first configuration information includes: a second logical channel list corresponding to the contention-based four-step random access manner.
  • the first random access type is a contention-based four-step random access type. Otherwise, the first random access type is a contention-based two-step random access type.
  • the first configuration information includes: a first logical channel list corresponding to the contention-based two-step random access mode and a second logical channel list corresponding to the contention-based four-step random access mode.
  • the first random access type is a contention-based two-step random access type. If the logical channel where the BSR triggered by the uplink data of the terminal device is located is in the second logical channel list, the first random access type is a contention-based four-step random access type.
  • the first configuration information includes: a correspondence between at least one logical channel and at least one random access type.
  • the first random access type is determined according to the logical channel where the BSR triggered by the uplink data of the terminal device is located and the corresponding relationship.
  • the communication unit 910 is further configured to send the contention-based two-step random access resource configuration and the contention-based four-step random access resource configuration to the terminal device.
  • the first configuration information is carried in RRC signaling.
  • the first random access type is a contention-based two-step random access type or a contention-based four-step random access type.
  • the above-mentioned communication unit may be a communication interface or a transceiver, or an input/output interface of a communication chip or a system-on-chip.
  • the network device 900 may correspond to the network device in the method embodiment of the present application, and the above-mentioned and other operations and/or functions of each unit in the network device 900 are respectively for realizing the method shown in FIG. 7 .
  • the corresponding process of the network device in the above will not be repeated here.
  • FIG. 10 is a schematic structural diagram of a communication device 1000 provided by an embodiment of the present application.
  • the communication device 1000 shown in FIG. 10 includes a processor 1010, and the processor 1010 can call and run a computer program from a memory to implement the method in the embodiments of the present application.
  • the communication device 1000 may further include a memory 1020 .
  • the processor 1010 may call and run a computer program from the memory 1020 to implement the methods in the embodiments of the present application.
  • the memory 1020 may be a separate device independent of the processor 1010, or may be integrated in the processor 1010.
  • the communication device 1000 may further include a transceiver 1030, and the processor 1010 may control the transceiver 1030 to communicate with other devices, specifically, may send information or data to other devices, or receive other devices Information or data sent by a device.
  • the processor 1010 may control the transceiver 1030 to communicate with other devices, specifically, may send information or data to other devices, or receive other devices Information or data sent by a device.
  • the transceiver 1030 may include a transmitter and a receiver.
  • the transceiver 1030 may further include antennas, and the number of the antennas may be one or more.
  • the communication device 1000 may specifically be the network device in this embodiment of the present application, and the communication device 1000 may implement the corresponding processes implemented by the network device in each method in the embodiment of the present application. For the sake of brevity, details are not repeated here. .
  • the communication device 1000 may specifically be a terminal device in this embodiment of the present application, and the communication device 1000 may implement the corresponding processes implemented by the terminal device in each method in this embodiment of the present application. For the sake of brevity, details are not repeated here. .
  • FIG. 11 is a schematic structural diagram of an apparatus according to an embodiment of the present application.
  • the apparatus 1100 shown in FIG. 11 includes a processor 1110, and the processor 1110 can call and run a computer program from a memory, so as to implement the method in the embodiment of the present application.
  • the apparatus 1100 may further include a memory 1120 .
  • the processor 1110 may call and run a computer program from the memory 1120 to implement the methods in the embodiments of the present application.
  • the memory 1120 may be a separate device independent of the processor 1110, or may be integrated in the processor 1110.
  • the apparatus 1100 may further include an input interface 1130 .
  • the processor 1110 may control the input interface 1130 to communicate with other devices or chips, and specifically, may acquire information or data sent by other devices or chips.
  • the apparatus 1100 may further include an output interface 1140 .
  • the processor 1110 may control the output interface 1140 to communicate with other devices or chips, and specifically, may output information or data to other devices or chips.
  • the apparatus can be applied to the network equipment in the embodiments of the present application, and the apparatus can implement the corresponding processes implemented by the network equipment in the various methods of the embodiments of the present application, which are not repeated here for brevity.
  • the apparatus may be applied to the terminal equipment in the embodiments of the present application, and the apparatus may implement the corresponding processes implemented by the terminal equipment in each method of the embodiments of the present application, which will not be repeated here for brevity.
  • the device mentioned in the embodiment of the present application may also be a chip.
  • it can be a system-on-chip, a system-on-a-chip, a system-on-a-chip, or a system-on-a-chip.
  • FIG. 12 is a schematic block diagram of a communication system 1200 provided by an embodiment of the present application. As shown in FIG. 12 , the communication system 1200 includes a terminal device 1210 and a network device 1220 .
  • the terminal device 1210 can be used to implement the corresponding functions implemented by the terminal device in the above method
  • the network device 1220 can be used to implement the corresponding functions implemented by the network device or the base station in the above method. Repeat.
  • the processor in this embodiment of the present application may be an integrated circuit chip, which has a signal processing capability.
  • each step of the above method embodiment may be completed by a hardware integrated logic circuit in a processor or an instruction in the form of software.
  • the above-mentioned processor can be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), an off-the-shelf programmable gate array (Field Programmable Gate Array, FPGA) or other available Programming logic devices, discrete gate or transistor logic devices, discrete hardware components.
  • DSP Digital Signal Processor
  • ASIC Application Specific Integrated Circuit
  • FPGA Field Programmable Gate Array
  • a general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
  • the steps of the method disclosed in conjunction with the embodiments of the present application may be directly embodied as executed by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor.
  • the software modules may be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other storage media mature in the art.
  • 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 this embodiment 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 may be a read-only memory (Read-Only Memory, ROM), a programmable read-only memory (Programmable ROM, PROM), an erasable programmable read-only memory (Erasable PROM, EPROM), an electrically programmable read-only memory (Erasable PROM, EPROM). Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory.
  • Volatile memory may be Random Access Memory (RAM), which acts as an external cache.
  • RAM Static RAM
  • DRAM Dynamic RAM
  • SDRAM Synchronous DRAM
  • SDRAM double data rate synchronous dynamic random access memory
  • Double Data Rate SDRAM DDR SDRAM
  • enhanced SDRAM ESDRAM
  • synchronous link dynamic random access memory Synchlink DRAM, SLDRAM
  • Direct Rambus RAM Direct Rambus RAM
  • the memory in the embodiment of the present application may also be a static random access memory (static RAM, SRAM), a 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, the memory in the embodiments of the present application is intended to include, but not limited to, these and any other suitable types of memory.
  • Embodiments of the present application further provide a computer-readable storage medium for storing a computer program.
  • the computer-readable storage medium can be applied to the network device or the base station in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the network device or the base station in each method of the embodiments of the present application, in order to It is concise and will not be repeated here.
  • the computer-readable storage medium can be applied to the mobile terminal/terminal device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the mobile terminal/terminal device in each method of the embodiments of the present application. , and are not repeated here for brevity.
  • 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 or the base station in the embodiments of the present application, and the computer program instructions cause the computer to execute the corresponding processes implemented by the network device or the base station in each method of the embodiments of the present application, for the sake of brevity. , and will not be repeated here.
  • the computer program product can be applied to the mobile terminal/terminal device in the embodiments of the present application, and the computer program instructions cause the computer to execute the corresponding processes implemented by the mobile terminal/terminal device in each method of the embodiments of the present application, For brevity, details are not repeated here.
  • the embodiments of the present application also provide a computer program.
  • the computer program can be applied to the network device or the base station in the embodiments of the present application, and when the computer program runs on the computer, the computer can execute the corresponding methods implemented by the network device or the base station in each method of the embodiments of the present application.
  • the process for the sake of brevity, will not be repeated here.
  • the computer program may be applied to the mobile terminal/terminal device in the embodiments of the present application, and when the computer program is run on the computer, the mobile terminal/terminal device implements the various methods of the computer program in the embodiments of the present application.
  • the corresponding process for the sake of brevity, will not be repeated here.
  • the disclosed system, apparatus and method may be implemented in other manners.
  • the apparatus embodiments described above are only illustrative.
  • the division of the units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented.
  • the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of 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 components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.
  • the functions, if implemented in the form of software functional units and sold or used as independent products, may be stored in a computer-readable storage medium.
  • the technical solution of the present application can be embodied in the form of a software product in essence, or the part that contributes to the prior art or the part of the technical solution, and the computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program codes .

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Abstract

Des modes de réalisation de la présente demande concernent un procédé de communication sans fil, un dispositif terminal et un dispositif de réseau. Le procédé comprend les étapes suivantes : un dispositif terminal obtient des premières informations de configuration du dispositif terminal, les premières informations de configuration étant utilisées pour déterminer un premier type d'accès aléatoire du dispositif terminal ; le dispositif terminal effectue un accès aléatoire en fonction du premier type d'accès aléatoire. De cette manière, la fiabilité d'un accès aléatoire peut être améliorée.
PCT/CN2020/119192 2020-09-30 2020-09-30 Procédé de communication sans fil, dispositif terminal et dispositif de réseau WO2022067614A1 (fr)

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PCT/CN2020/119192 WO2022067614A1 (fr) 2020-09-30 2020-09-30 Procédé de communication sans fil, dispositif terminal et dispositif de réseau

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