WO2023133885A1 - 无线通信的方法和终端设备 - Google Patents

无线通信的方法和终端设备 Download PDF

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Publication number
WO2023133885A1
WO2023133885A1 PCT/CN2022/072337 CN2022072337W WO2023133885A1 WO 2023133885 A1 WO2023133885 A1 WO 2023133885A1 CN 2022072337 W CN2022072337 W CN 2022072337W WO 2023133885 A1 WO2023133885 A1 WO 2023133885A1
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WIPO (PCT)
Prior art keywords
random access
contention resolution
terminal device
msg3
resolution timer
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PCT/CN2022/072337
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English (en)
French (fr)
Inventor
胡奕
李海涛
于新磊
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Oppo广东移动通信有限公司
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Priority to PCT/CN2022/072337 priority Critical patent/WO2023133885A1/zh
Publication of WO2023133885A1 publication Critical patent/WO2023133885A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

Definitions

  • the embodiments of the present application relate to the communication field, and in particular to a wireless communication method and a terminal device.
  • the terminal device will start or restart the random access contention resolution timer (ra-ContentionResolutionTimer) after sending a message 3 (Msg3) each time, and within the timer running time Monitor the physical downlink control channel (Physical Downlink Control Channel, PDCCH) to receive message 4 (Msg4). If the terminal device does not receive the Cell Radio Network Temporary Identifier (C-RNTI) or the Temporary Cell Radio Network Temporary Identity (TC-RNTI) plus until the ra-ContentionResolutionTimer times out If the PDCCH is disturbed, it is considered that the random access fails this time, and the terminal device will try to initiate the random access again.
  • C-RNTI Cell Radio Network Temporary Identifier
  • TC-RNTI Temporary Cell Radio Network Temporary Identity
  • the terminal device will start or restart the ra-ContentionResolutionTimer after sending the Msg3, and monitor the PDCCH during the running time of the timer.
  • the terminal device will stop ra-ContentionResolutionTimer only when receiving Msg4.
  • the terminal device restarts the timer ra-ContentionResolutionTimer after sending the retransmission of Msg3.
  • NTN Non-Terrestrial Networks
  • the present application provides a wireless communication method and a terminal device, which are beneficial to prevent the terminal device from frequently initiating random access, reduce random access delay, and improve random access success rate.
  • a wireless communication method including: when the random access contention resolution timer expires, and before the random access contention resolution timer expires, the physical downlink control of retransmission of the scheduling message Msg3 is not received In the case of channel PDCCH, the terminal device considers that the contention resolution is unsuccessful.
  • a terminal device configured to execute the method in the foregoing first aspect or various implementation manners thereof.
  • the terminal device includes a functional module for executing the method in the above first aspect or its various implementation manners.
  • a terminal device including a processor and a memory.
  • the memory is used to store a computer program
  • the processor is used to call and run the computer program stored in the memory to execute the method in the above first aspect or its various implementations.
  • a chip is provided for implementing the method in the above first aspect or various implementation manners thereof.
  • the chip includes: a processor, configured to call and run a computer program from a memory, so that a device installed with the device executes the method in the above first aspect or its various implementations.
  • a computer-readable storage medium for storing a computer program, and the computer program causes a computer to execute the method in the above-mentioned first aspect or each implementation manner thereof.
  • a computer program product including computer program instructions, where the computer program instructions cause a computer to execute the method in the above first aspect or each implementation manner thereof.
  • a computer program which, when running on a computer, causes the computer to execute the method in the above first aspect or various implementations thereof.
  • the terminal device when the random access contention resolution timer expires, and the PDCCH for retransmission of the scheduling message Msg3 is not received before the random access contention resolution timer expires, the terminal device considers that the contention resolution is unsuccessful; And/or, when the random access contention resolution timer expires and receives the PDCCH for retransmission of the scheduling message Msg3 before the random access contention resolution timer expires, the terminal device does not consider the contention resolution to be a failure, further according to The reception of Msg4 after retransmitting Msg3 determines whether the contention resolution is successful, which is helpful to avoid the problem that the terminal device considers that the contention resolution has failed when the random access contention resolution timer expires, resulting in frequent random access initiations, reducing the risk of random access The time delay improves the success rate of random access.
  • FIGS. 1A-1C are schematic diagrams of a communication system architecture provided by an embodiment of the present application.
  • Figure 2 is an architecture diagram of the NTN system based on transparent forwarding satellites.
  • Figure 3 is an architecture diagram of the NTN system based on regenerating and forwarding satellites.
  • Fig. 4 is a schematic diagram of a four-step random access process.
  • FIG. 5 is a schematic diagram of a judging mechanism for random access contention resolution in the related art.
  • FIG. 6 is a schematic diagram of a wireless communication method provided by an embodiment of the present application.
  • FIG. 7 is a schematic diagram of a judging mechanism for random access contention resolution provided according to an embodiment of the present application.
  • Fig. 8 is a schematic block diagram of a terminal device according to an embodiment of the present application.
  • Fig. 9 is a schematic block diagram of a communication device provided by another embodiment of the present application.
  • Fig. 10 is a schematic block diagram of a chip provided by an embodiment of the present application.
  • Fig. 11 is a schematic block diagram of a communication system provided by an embodiment of the present application.
  • the technical solution of the embodiment of the present application can be applied to various communication systems, such as: Global System of Mobile communication (Global System of Mobile communication, GSM) system, code division multiple access (Code Division Multiple Access, CDMA) system, broadband code division multiple access (Wideband Code Division Multiple Access, WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, Advanced long term evolution (LTE-A) system , New Radio (NR) system, evolution system of NR system, LTE (LTE-based access to unlicensed spectrum, LTE-U) system on unlicensed spectrum, NR (NR-based access to unlicensed spectrum) on unlicensed spectrum unlicensed spectrum (NR-U) system, Non-Terrestrial Networks (NTN) system, Universal Mobile Telecommunications System (UMTS), Wireless Local Area Networks (WLAN), Wireless Fidelity (Wireless Fidelity, WiFi), fifth-generation communication (5th-Generation, 5G) system or other communication systems, etc.
  • GSM Global System of Mobile
  • D2D Device to Device
  • M2M Machine to Machine
  • MTC Machine Type Communication
  • V2V Vehicle to Vehicle
  • V2X Vehicle to everything
  • the communication system in the embodiment of the present application may be applied to a carrier aggregation (Carrier Aggregation, CA) scenario, may also be applied to a dual connectivity (Dual Connectivity, DC) scenario, and may also be applied to an independent (Standalone, SA) network deployment scenario.
  • Carrier Aggregation, CA Carrier Aggregation
  • DC Dual Connectivity
  • SA independent network deployment scenario
  • the communication system in the embodiment of the present application can be applied to an unlicensed spectrum, wherein the unlicensed spectrum can also be considered as a shared spectrum; or, the communication system in the embodiment of the present application can also be applied to a licensed spectrum, wherein the licensed spectrum can also be Considered as unshared spectrum.
  • Non-Terrestrial Networks NTN
  • TN terrestrial communication network
  • the embodiments of the present application describe various embodiments in conjunction with network equipment and terminal equipment, wherein the terminal equipment may also be referred to as user equipment (User Equipment, UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device, etc.
  • user equipment User Equipment, UE
  • access terminal user unit
  • user station mobile station
  • mobile station mobile station
  • remote station remote terminal
  • mobile device user terminal
  • terminal wireless communication device
  • wireless communication device user agent or user device
  • the terminal device can be a station (STATION, ST) in the WLAN, and can be a cellular phone, a cordless phone, a Session Initiation Protocol (Session Initiation Protocol, SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, a personal digital processing (Personal Digital Assistant, PDA) devices, handheld devices with wireless communication functions, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices, next-generation communication systems such as terminal devices in NR networks, or future Terminal equipment in the evolved public land mobile network (Public Land Mobile Network, PLMN) network, etc.
  • 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 aircraft, 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) terminal device, an augmented reality (Augmented Reality, AR) terminal Equipment, wireless terminal equipment in industrial control, wireless terminal equipment in self driving, wireless terminal equipment in remote medical, wireless terminal equipment in smart grid , wireless terminal equipment in transportation safety, wireless terminal equipment in smart city, or wireless terminal equipment in smart home.
  • a virtual reality (Virtual Reality, VR) terminal device an augmented reality (Augmented Reality, AR) terminal Equipment
  • wireless terminal equipment in industrial control wireless terminal equipment in self driving
  • wireless terminal equipment in remote medical wireless terminal equipment in smart grid
  • wireless terminal equipment in transportation safety wireless terminal equipment in smart city, or wireless terminal equipment in smart home.
  • the terminal equipment involved in the embodiments of the present 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, remote station , remote terminal equipment, mobile equipment, UE terminal equipment, wireless communication equipment, UE agent or UE device, etc.
  • Terminal equipment can also be fixed or mobile.
  • the terminal device may also be a wearable device.
  • Wearable devices can also be called wearable smart devices, which is a general term for the application of wearable technology to intelligently design daily wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes.
  • a wearable device is a portable device that is worn directly on the body or integrated into the user's clothing or accessories. Wearable devices are not only a hardware device, but also achieve powerful functions through software support, data interaction, and cloud interaction.
  • Generalized wearable smart devices include full-featured, large-sized, complete or partial functions without relying on smart phones, such as smart watches or smart glasses, etc., and only focus on a certain type of application functions, and need to cooperate with other devices such as smart phones Use, such as various smart bracelets and smart jewelry for physical sign monitoring.
  • the network device may be a device for communicating with the mobile device, and the network device may be an access point (Access Point, AP) in WLAN, a base station (Base Transceiver Station, BTS) in GSM or CDMA , or a base station (NodeB, NB) in WCDMA, or an evolved base station (Evolutional Node B, eNB or eNodeB) in LTE, or a relay station or access point, or a vehicle-mounted device, a wearable device, and an NR network
  • BTS Base Transceiver Station
  • NodeB, NB base station
  • Evolutional Node B, eNB or eNodeB evolved base station
  • LTE Long Term Evolutional Node B, eNB or eNodeB
  • gNB network equipment in the network or the network equipment in the future evolved PLMN network or the network equipment in the NTN network, etc.
  • the network device may have a mobile feature, for example, the network device may be a mobile device.
  • the network device may be a satellite or a balloon station.
  • the satellite can be a low earth orbit (low earth orbit, LEO) satellite, a medium earth orbit (medium earth orbit, MEO) satellite, a geosynchronous earth orbit (geosynchronous earth orbit, GEO) satellite, a high elliptical orbit (High Elliptical Orbit, HEO) satellite. ) Satellite etc.
  • the network device may also be a base station installed on land, in water, and other locations.
  • the network device may provide services for a cell, and the terminal device communicates with the network device through the transmission resources (for example, frequency domain resources, or spectrum resources) used by the cell, and the cell may be a network device ( For example, a cell corresponding to a base station), the cell may belong to a macro base station, or may belong to a base station corresponding to a small cell (Small cell), and the small cell here may include: a metro cell (Metro cell), a micro cell (Micro cell), a pico cell ( Pico cell), Femto cell, etc. These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services.
  • the transmission resources for example, frequency domain resources, or spectrum resources
  • the cell may be a network device (
  • the cell may belong to a macro base station, or may belong to a base station corresponding to a small cell (Small cell)
  • the small cell here may include: a metro cell (Metro cell), a micro cell (Micro
  • FIG. 1A is a schematic structural diagram of a communication system provided by an embodiment of the present application.
  • a communication system 100 may include a network device 110, and the network device 110 may be a device for communicating with a terminal device 120 (or called a communication terminal, terminal).
  • the network device 110 can provide communication coverage for a specific geographical area, and can communicate with terminal devices located in the coverage area.
  • FIG. 1A exemplarily shows one network device and two terminal devices.
  • the communication system 100 may include multiple network devices and each network device may include other numbers of terminals within the coverage area.
  • the device is not limited in the embodiment of this application.
  • FIG. 1B is a schematic structural diagram of another 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 may function as a base station, and the terminal device 1101 and the satellite 1102 may communicate directly. Under the system architecture, the satellite 1102 can 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 is not limited in this embodiment of the present application.
  • FIG. 1C is a schematic structural diagram of another communication system provided by an embodiment of the present application.
  • it includes a terminal device 1201 , a satellite 1202 and a base station 1203 , wireless communication can be performed between the terminal device 1201 and the satellite 1202 , and communication can be performed between the satellite 1202 and the base station 1203 .
  • the network formed among the terminal equipment 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 a 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 called 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 is not limited in this embodiment of the present application.
  • Fig. 1A-Fig. 1C are only illustrations of the systems to which this application is applicable.
  • the methods shown in the embodiments of this application can also be applied to other systems, for example, 5G communication systems, LTE communication systems, etc. , which is not specifically limited in this embodiment of the present application.
  • the wireless communication system shown in FIG. 1A-FIG. 1C may further include a mobility management entity (Mobility Management Entity, MME), an access and mobility management function (Access and Mobility Management Function, AMF) and other network entities, which are not limited in this embodiment of the present application.
  • MME Mobility Management Entity
  • AMF Access and Mobility Management Function
  • a device with a communication function in the network/system in the embodiment of the present application may be referred to as a communication device.
  • the communication equipment may include a network equipment 110 and a terminal equipment 120 with communication functions, and the network equipment 110 and the terminal equipment 120 may be the specific equipment 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 this embodiment of the present application.
  • the "indication" mentioned in the embodiments of the present application may be a direct indication, may also be an indirect indication, and may also mean that there is an association relationship.
  • a indicates B which can mean that A directly indicates B, for example, B can be obtained through A; it can also indicate that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; it can also indicate that there is an association between A and B relation.
  • the term "corresponding" may indicate that there is a direct or indirect correspondence between the two, or that there is an association between the two, or that it indicates and is indicated, configuration and is configuration etc.
  • predefined can be realized by pre-saving corresponding codes, tables, or other methods that can be used to indicate relevant information in devices (for example, including terminal devices and network devices). Its specific implementation manner is not limited. For example, the predefined ones may refer to those defined in the protocol.
  • the "protocol” may refer to a standard protocol in the communication field, for example, it may include the LTE protocol, the NR protocol, and related protocols applied to future communication systems, which is not limited in the present application.
  • the functions provided by the satellite can include transparent forwarding (transparent payload) and regenerative forwarding (regenerative payload).
  • transparent forwarding satellites it only provides the functions of radio frequency filtering, frequency conversion and amplification, and only provides transparent forwarding of signals without changing the waveform signal it forwards.
  • regenerative transponder satellites in addition to providing radio frequency filtering, frequency conversion and amplification functions, it can also provide demodulation/decoding, routing/conversion, coding/modulation functions, which have part or all of the functions of the base station.
  • FIG. 2 is a system architecture diagram based on transparent forwarding satellites
  • FIG. 3 is a system architecture diagram based on regenerative forwarding satellites.
  • the NTN gateways and satellites can be considered to form remote radio units (Remote Radio Units), which are used in terminal equipment and TN systems
  • the communication between the access network devices is equivalent to the remote wireless unit providing the function of the NR Uu interface for communication between the terminal device and the access network device.
  • the NTN gateway communicates with the satellite through a feeder link, and the satellite and terminal equipment can communicate through a service link.
  • the access network equipment (such as gNB) in the TN system communicates with the 5G core network (Core Network, CN) through the next generation (Next Generation, NG) interface, and the 5G CN communicates with the data network (Data Network) through the N6 interface .
  • the access network equipment of the NTN system and the TN system form a next generation access network (NG-RAN).
  • NG-RAN next generation access network
  • the NTN system based on regenerative and forwarding satellites can also include NTN and satellites. Unlike the NTN system based on transparent transmission and forwarding satellites, satellites can communicate with each other, specifically, satellites and satellites Communication between satellite radio interface (satellite radio inferface, SRI), or InterStar link (InterStar link).
  • satellite radio interface satellite radio inferface, SRI
  • InterStar link InterStar link
  • the satellite can be used as an access network device to communicate with the terminal device, for example, the satellite can communicate with the terminal device through the NR Uu interface.
  • the satellite can communicate with the 5G CN through the NG interface, and the 5G CN communicates with the data network through the N6 interface. It can be considered that the NTN system constitutes the next generation access network (NG-RAN).
  • NG-RAN next generation access network
  • FIG. 1 to FIG. 3 are only examples of application scenarios of the present application, and should not be construed as limitations on the present application.
  • the NTN system may also include an unmanned aircraft system (Unmanned Aircraft System).
  • Unmanned Aircraft System Unmanned Aircraft System
  • UAS platforms include, but are not limited to, High Altitude Platform Stations (HAPS).
  • HAPS High Altitude Platform Stations
  • the random access process is mainly triggered by the following events:
  • RRC Radio Resource Control
  • RRC connection re-establishment process so that the UE can re-establish the wireless connection after the wireless link fails;
  • the terminal device needs to establish uplink synchronization with the new cell
  • the downlink (DownLink, DL) data arrives, and the uplink (UpLink, UL) is out of sync at this time;
  • the uplink (UpLink, UL) data arrives.
  • the UL is in an out-of-sync state or there is no physical uplink control channel (Physical Uplink Control Channel, PUCCH) resource for sending a scheduling request (Scheduling Request, SR);
  • PUCCH Physical Uplink Control Channel
  • the UE transitions from the RRC_INACTIVE state to the RRC_CONNECTED state;
  • SI System Information
  • a four-step random access process is supported, specifically including the sending process of message 1 (Msg1)-message 4 (Msg4).
  • the four-step random access process includes the following steps:
  • Step 1 the terminal device sends a random access preamble (Preamble, that is, Msg 1) to the network device.
  • Preamble that is, Msg 1
  • the random access preamble may also be referred to as a preamble, a random access preamble sequence, a preamble sequence, and the like.
  • the terminal device may select physical random access channel (Physical Random Access Channel, PRACH) resources, and the PRACH resources may include time domain resources, frequency domain resources, and code domain resources.
  • the network device sends random access related parameters to the terminal device through the broadcast system information block (System Information Block, SIB) 1, wherein the random access public configuration information element (RACH-ConfigCommon IE) for the synchronization signal block (Synchronization Signal Block,
  • the reference signal receiving power (Reference Signal Receiving Power, RSRP) threshold value (rsrp-ThresholdSSB) of SSB) is used for terminal equipment to carry out SSB selection, and terminal equipment compares the RSRP measurement result under each SSB with rsrp-ThresholdSSB, selects The SSB whose measurement value is higher than the configured threshold value is accessed, and if there is no SSB meeting the configured threshold value, one of all SSBs is randomly selected for access.
  • SIB System Information Block
  • Each SSB corresponds to a set of random access preamble (Preamble) resources and random access opportunity (RACH Occasion, RO) resources, and the terminal device randomly selects from the contention-based random access resources in the selected SSB, Set the Preamble index (PREAMBLE_INDEX) to the selected random access Preamble.
  • the network device can estimate the transmission delay between itself and the terminal device according to the Preamble and use this to calibrate the uplink timing (timing), and can generally determine the resource size required by the terminal device to transmit Msg 3 .
  • the Preamble is divided into Preamble group (group) A and Preamble group B. If there is Preamble group B in the random access resource, The terminal device can select the Preamble group according to the size of Msg 3 and the path loss.
  • Step 2 the network device sends a random access response (Random Access Response, RAR, or Msg 2) to the terminal device
  • a random access response window (ra-ResponseWindow) can be opened, and in the ra-ResponseWindow, it is detected according to the Random Access Radio Network Temporary Identifier (RA-RNTI) Corresponding PDCCH.
  • RA-RNTI Random Access Radio Network Temporary Identifier
  • the RA-RNTI is related to the PRACH time-frequency resource used by the terminal equipment to send Msg1.
  • the terminal device After the terminal device successfully receives the PDCCH scrambled by the RA-RNTI, the terminal device can obtain the PDSCH scheduled by the PDCCH, which contains the RAR, and the RAR specifically includes the following information:
  • the RAR subheader (subheader) contains a back-off indicator (Back-off Indicator, BI), which is used to indicate the back-off time of retransmitting Msg1;
  • BI Back-off Indicator
  • Random Access Preamble Identifier in RAR: the response of the network device to the received PREAMBLE_INDEX;
  • the RAR data (payload) contains a Timing Advance Group (TAG), which is used to adjust the uplink timing;
  • TAG Timing Advance Group
  • Uplink grant used to schedule the uplink resource indication of Msg3;
  • Temporary cell RNTI Temporary C-RNTI, TC-RNTI: used for scrambling and scheduling the PDCCH of Msg4 (for initial access), and can also be used for scrambling and scheduling the PDCCH of Msg3 retransmission.
  • the terminal device receives the PDCCH scrambled by the RAR-RNTI, and the RAR contains the PREAMBLE_INDEX sent in Msg1, the terminal device considers that the RAR has been successfully received.
  • the terminal device If the terminal device detects the PDCCH scrambled by the RA-RNTI, it can obtain the Physical Downlink Shared Channel (PDSCH) scheduled by the PDCCH.
  • the PDSCH includes the RAR corresponding to the Preamble.
  • the terminal device needs to retransmit Msg 1, if the number of transmissions of the Preamble exceeds the network configuration The maximum number of transmissions (preambleTransMax), the terminal device reports the random access problem to the upper layer.
  • Step 3 the terminal device sends Msg 3.
  • the terminal device judges whether the RAR is its own RAR message. For example, the terminal device can use the preamble index to check. After determining that it is its own RAR message, it can generate Msg 3 at the RRC layer, and Send Msg 3 to the network device, which needs to carry the identification information of the terminal device, etc.
  • Msg 3 is mainly used to notify the network device of the random access trigger event.
  • the Msg 3 sent by the terminal device in step 3 may include different content, specifically, Msg3 may carry the terminal identifier (that is, the contention resolution identifier, used for the contention resolution in step 4) and the establishment Reason (establishment cause).
  • Msg 3 may include an RRC connection request message (RRC Setup Request) generated by the RRC layer.
  • RRC Setup Request RRC Setup Request
  • Msg 3 may also carry, for example, the 5G-Serving Temporary Mobile Subscriber Identity (Serving-Temporary Mobile Subscriber Identity, S-TMSI) or random number of the terminal device.
  • S-TMSI Serving-Temporary Mobile Subscriber Identity
  • Msg 3 may include an RRC connection reestablishment request message (RRC Reestabilshment Request) generated by the RRC layer.
  • RRC Reestabilshment Request RRC connection reestablishment request message
  • Msg 3 may also carry, for example, a Cell Radio Network Temporary Identifier (C-RNTI) and the like.
  • C-RNTI Cell Radio Network Temporary Identifier
  • Msg 3 may include an RRC handover confirmation message (RRC Handover Confirm) generated by the RRC layer, which carries the C-RNTI of the terminal device.
  • RRC Handover Confirm RRC handover confirmation message
  • Msg 3 may also carry information such as a buffer status report (Buffer Status Report, BSR).
  • BSR Buffer Status Report
  • Msg3 may at least include the C-RNTI of the terminal device.
  • Msg3 supports Hybrid Automatic Repeat reQuest (HARQ) retransmission.
  • HARQ Hybrid Automatic Repeat reQuest
  • Msg3 is carried by the Physical Uplink Shared Channel (PUSCH)
  • the RAR in Msg2 carries the UL grant of the PUSCH used for the initial transmission of Msg3
  • the UL grant carried in the RAR is called RAR UL grant.
  • the information carried by the RAR UL grant information may include PUSCH time domain and frequency domain resource allocation information, power control command TPC, frequency hopping, and MCS, etc.
  • the network device If the network device does not receive Msg3 correctly, it will indicate the retransmission scheduling information of Msg3 through DCI, for example, the DCI format 0_0 bearer scrambled by Temporary Cell Radio Network Temporary Identity (TC-RNTI), In addition to the content contained in RAR UL grant, it also includes New Data Indicator (NDI), redundancy version, and HARQ process number.
  • DCI for example, the DCI format 0_0 bearer scrambled by Temporary Cell Radio Network Temporary Identity (TC-RNTI), In addition to the content contained in RAR UL grant, it also includes New Data Indicator (NDI), redundancy version, and HARQ process number.
  • TC-RNTI Temporary Cell Radio Network Temporary Identity
  • Step 4 the network device sends a contention resolution message (contention resolution), namely Msg 4, to the terminal device.
  • a contention resolution message contention resolution
  • the terminal device After sending Msg3 each time, the terminal device will start or restart the random access contention resolution start timer (ra-ContentionResolutionTimer), and monitor the PDCCH scrambled by C-RNTI or TC-RNTI during the running of ra-ContentionResolutionTimer.
  • ra-ContentionResolutionTimer random access contention resolution start timer
  • Msg4 mainly has two functions: one is used for contention conflict resolution, and the other is for the network device to transmit the RRC configuration message to the terminal device.
  • contention conflict resolution There are mainly two methods for contention conflict resolution: one is: if the terminal equipment carries C-RNTI in Msg3, Msg4 uses C-RNTI to scramble PDCCH scheduling.
  • the other is: if the terminal device does not carry C-RNTI in Msg3, such as the initial access scenario, then Msg4 adopts PDCCH scheduling with TC-RNTI scrambling, and the terminal device receives the PDSCH carrying Msg4, and matches the common
  • the contention resolution flag in the control channel (common control channel, CCCH) service data unit (service data unit, SDU) determines whether the contention is resolved, or in other words, whether the contention resolution is successful.
  • the terminal device will start or restart the timer ra-ContentionResolutionTimer after sending Msg3 each time, and monitor the PDCCH within the running time of the timer ra-ContentionResolutionTimer to receive Msg4. If the terminal device does not receive the PDCCH scrambled by C-RNTI or TC-RNTI until ra-ContentionResolutionTimer times out, it considers that the random access has failed, and the terminal device will re-initiate random access, that is, resend Msg1. When the number of times the terminal device sends Msg1 reaches a certain threshold, the terminal device will indicate to the upper layer that a random access problem has occurred.
  • the terminal device will start or restart the ra-ContentionResolutionTimer after sending the Msg3, and monitor the PDCCH during the running time of the timer ra-ContentionResolutionTimer.
  • the round trip time (Round Trip Time, RTT) between the terminal device and the network device is greatly increased.
  • RTT und Trip Time
  • the terminal device stops ra-ContentionResolutionTimer only when receiving Msg4.
  • the terminal device restarts the timer ra-ContentionResolutionTimer after completing the retransmission of Msg3.
  • the terminal device since the startup time of ra-ContentionResolutionTimer is delayed by a time offset, and during the period after the terminal device finishes retransmitting Msg3 and before restarting ra-ContentionResolutionTimer, ra-ContentionResolutionTimer has timed out, and the terminal The device will think that the contention resolution fails, and then try random access again, which increases the random access delay.
  • the terminal device performs initial transmission of Msg3 at time t1, and starts ra-ContentionResolutionTimer at time t2 after the initial transmission of Msg3 is completed and a first time interval has elapsed.
  • the terminal device receives the PDCCH scrambled by the TC-RNTI indicating retransmission of Msg3 at time t3, and the PDCCH indicates retransmission of Msg3 occurs at time t5.
  • ra-ContentionResolutionTimer times out at time t4. In this case, the terminal device considers that the contention resolution fails, and needs to retry random access, which increases the random access delay and reduces the random access success rate.
  • FIG. 6 is a schematic diagram of a wireless communication method 200 according to an embodiment of the present application. As shown in FIG. 6, the method 200 includes the following content:
  • the embodiments of the present application may be applied to the NTN system, or may also be applied to the TN system, which is not limited in the present application.
  • the PDCCH for scheduling Msg3 retransmission is received before the random access contention resolution timer started based on Msg3 initial transmission expires, but before the random access contention resolution timer is restarted based on Msg3 retransmission, or before the retransmission of Msg3, based on The random access contention resolution timer started by the initial transmission of Msg3 has expired. In this case, if the terminal device believes that the contention resolution has failed, there will be a misjudgment of the contention resolution.
  • the random access contention resolution timer expires before Msg3 is retransmitted, or the random access contention resolution timer Before the restart, the random access contention resolution timer started last time has expired, or, for the TN system, due to the long time for the terminal equipment to prepare Msg3 or other reasons, the random access contention resolution timer before the retransmission of Msg3 may also be caused Timed out, or before the random access contention resolution timer is restarted, the last started random access contention resolution timer has timed out.
  • the TN system includes but is not limited to an NR system (or called an NR-TN system) and an Internet of Things (Internet of Things, IoT) system (or called an IoT-TN system).
  • NR or called an NR-TN system
  • IoT Internet of Things
  • the IoT system may include but not limited to narrowband Internet of Things (Narrow Band Internet of Things, NB-IoT) system (or NB-IoT-TN system) and enhanced machine type communication (enhanced Machine Type Communication, eMTC) system (or eMTC-TN system).
  • narrowband Internet of Things Near Band Internet of Things
  • NB-IoT narrow Band Internet of Things
  • eMTC enhanced Machine Type Communication
  • the terminal device is a UE in a TN system.
  • a UE in the NR system a UE in the IoT system, as an example, a UE in the NB-IoT system, or a UE in the eMTC system.
  • the NTN system includes, but is not limited to, a New Radio NTN (NR-NTN) system and an Internet of Things NTN (IoT-NTN) system.
  • NR-NTN New Radio NTN
  • IoT-NTN Internet of Things NTN
  • the IoT-NTN system may include at least one of the following:
  • NB-IoT-based NTN system or Narrow Band Internet of Things over NTN (NB-IoT-NTN) system;
  • eMTC-based NTN system or enhanced Machine Type Communication over NTN (eMTC-NTN) system.
  • eMTC-NTN enhanced Machine Type Communication over NTN
  • Embodiment 1 The random access contention resolution timer is started or restarted in the first time domain symbol after the Msg3 is sent.
  • the sending of the Msg3 may refer to the completion of the initial transmission of the Msg3, or may also refer to the completion of the retransmission of the Msg3.
  • start ra-ContentionResolutionTimer on the first time domain symbol after the initial transmission of Msg3 is completed
  • Embodiment 1 may be applicable to a TN system, for example, an NR-TN system.
  • the terminal device can start or restart ra-ContentionResolutionTimer at the first time domain symbol after sending Msg3, or start or restart ra-ContentionResolutionTimer at the next time domain symbol after sending Msg3 .
  • Embodiment 2 The random access contention resolution timer is started or restarted at the first time domain symbol after the first time offset of Msg3 is sent. It should be understood that the sending of the Msg3 here may refer to the completion of the initial transmission of the Msg3, or may also refer to the completion of the retransmission of the Msg3.
  • start ra-ContentionResolutionTimer on the first time domain symbol after the first time offset after the initial transmission of Msg3 is completed
  • start ra-ContentionResolutionTimer on the first time domain symbol after the first time offset after the completion of the retransmission of Msg3 Restart ra-ContentionResolutionTimer on.
  • Embodiment 2 may be applicable to an NTN system, for example, an NR-NTN system.
  • the terminal device starts or restarts the ra-ContentionResolutionTimer at the first time domain symbol after the first time offset after sending the Msg3.
  • the terminal device starts or restarts the ra-ContentionResolutionTimer at the next time domain symbol after the first time offset after sending the Msg3.
  • the first time offset is determined according to the round-trip delay RTT between the terminal device and the network device.
  • the first time offset may be the RTT between the terminal device and the network device. is the UE-gNB RTT.
  • Embodiment 3 The random access contention resolution timer is started or restarted in the subframe where the last repeated transmission of the first PUSCH is located, wherein the first PUSCH is used to carry the Msg3, that is, the first PUSCH carries the Msg3 PUSCH, or Msg3PUSCH.
  • the third embodiment may be applicable to a TN system, such as an IoT system, that is, an IoT-TN system, specifically, for example, an NB-IoT system or an eMTC system.
  • a TN system such as an IoT system, that is, an IoT-TN system, specifically, for example, an NB-IoT system or an eMTC system.
  • the terminal device starts or restarts ra-ContentionResolutionTimer in the subframe where the last repeated transmission of Msg3 PUSCH is completed.
  • Embodiment 4 The random access contention resolution timer is started after the subframe where the last repeated transmission of the second PUSCH is located plus the first time offset, wherein the second PUSCH is used to carry the message 3 . That is, the second PUSCH is a PUSCH carrying Msg3, or called Msg3 PUSCH.
  • Embodiment 4 may be applicable to an NTN system, such as an IoT-NTN system, specifically such as an NB-IoT-NTN system or an eMTC-NTN system.
  • an NTN system such as an IoT-NTN system, specifically such as an NB-IoT-NTN system or an eMTC-NTN system.
  • the terminal device starts or restarts ra-ContentionResolutionTimer after the subframe where the last repeated transmission of Msg3 PUSCH is completed plus the first time offset. That is, the first time offset between the start or restart time of ra-ContentionResolutionTimer and the subframe where the last transmission of Msg3 PUSCH is located.
  • the first time offset is determined according to a round-trip time delay RTT between the terminal device and the network device.
  • the first time offset may be the RTT between the terminal device and the network device, denoted as UE-gNB RTT.
  • the unit of the first time offset may be a subframe.
  • the method 200 further includes:
  • the TC-RNTI is discarded, wherein the TC-RNTI Used to scramble the PDCCH.
  • the terminal device when the random access contention resolution timer expires, and the PDCCH that schedules retransmission of Msg3 is not received before the random access contention resolution timer expires, the terminal device considers that the contention resolution fails, if the terminal If the number of times the device sends Msg1 is less than the maximum number of Msg1 transmissions configured by the network device, the terminal device will re-initiate the random access process. Therefore, the terminal device can discard the RNTI of the PDCCH used to scramble and schedule the retransmission of Msg3, that is, TC- RNTI. Further, during the re-initiated random access process, the network device may configure a new TC-RNTI for the terminal device through the RAR, for scrambling and scheduling the PDCCH for retransmission of Msg3.
  • the method 200 further includes:
  • the terminal device When the random access contention resolution timer expires and the PDCCH for scheduling retransmission of Msg3 is received before the random access contention resolution timer expires, the terminal device does not consider contention resolution failure.
  • the The end device when the random access contention resolution timer expires and a PDCCH for scheduling Msg3 retransmission is received before the random access contention resolution timer expires, the The end device does not consider contention resolution to be a failure.
  • the terminal device when the random access contention resolution timer expires and the PDCCH for scheduling Msg3 retransmission is received before the random access contention resolution timer expires, the terminal device considers contention resolution failure .
  • the random access contention resolution timer expires and the PDCCH for scheduling Msg3 retransmission is received before the random access contention resolution timer expires Under the condition, none of the terminal devices considers that the contention resolution fails.
  • the terminal device when the terminal device does not think that the contention resolution fails, the terminal device retransmits Msg3, restarts the random access contention resolution timer, and determines whether the contention resolution is Success, wherein, for the timing of restarting the random access contention resolution timer, refer to the relevant descriptions in the first to fourth embodiments above, which will not be repeated here.
  • the terminal device retransmits the Msg3 and restarts after the first time offset for retransmitting the Msg3
  • the terminal device monitors the PDCCH scrambled by the C-RNTI or TC-RNTI to receive Msg 4.
  • the terminal device determine whether the contention is resolved by matching the contention resolution identification in the CCCH SDU in the PDSCH and the terminal identification carried in Msg3. For example, if the two match, it is considered that the contention resolution is successful. Otherwise, consider that contention resolution fails, and re-initiate random access.
  • the NTN scenario is taken as an example to illustrate the judging mechanism for solving random access contention provided by the embodiment of the present application, but the present application is not limited thereto.
  • the terminal device performs initial transmission of Msg3 at time t1, and starts ra-ContentionResolutionTimer at time t2 after the initial transmission of Msg3 is completed and a first time interval has elapsed.
  • the terminal device receives the PDCCH scrambled by the TC-RNTI indicating retransmission of Msg3 at time t3, and the time of retransmission of the PDCCH indicating Msg3 is at time t5.
  • the terminal device retransmits Msg3 at time t5, and starts ra-ContentionResolutionTimer at time t6 after the retransmission of Msg3 is completed and the first time interval has elapsed.
  • ra-ContentionResolutionTimer monitor the PDCCH scrambled by C-RNTI or TC-RNTI to receive Msg4. For example, in the case of receiving the PDSCH carrying Msg4, determine whether the contention is resolved by matching the contention resolution identification in the CCCH SDU in the PDSCH and the terminal identification carried in Msg3, for example, if the two match, it is considered that the contention is resolved If it succeeds, otherwise, it is considered that the contention resolution has failed, and if the number of times the terminal device sends Msg1 is less than the maximum number of transmission thresholds configured by the network device, the terminal device re-initiates random access.
  • the terminal when the random access contention resolution timer expires and the PDCCH for retransmission of the scheduling message Msg3 is not received before the random access contention resolution timer expires, the terminal The device considers that the contention resolution is unsuccessful; and/or, when the random access contention resolution timer expires and receives the PDCCH for retransmission of the scheduling message Msg3 before the random access contention resolution timer expires, the terminal device does not It is considered that the contention resolution has failed, and further according to the reception of Msg4 after the retransmission of Msg3, it is judged whether the contention resolution is successful, which is conducive to avoiding the situation that the terminal device considers that the contention resolution has failed when the random access contention resolution timer expires, resulting in frequent initiation of random access problem, reducing the random access delay and improving the success rate of random access.
  • Fig. 8 shows a schematic block diagram of a terminal device 400 according to an embodiment of the present application.
  • the terminal device 400 includes:
  • the processing unit 410 is configured to consider that the contention is resolved when the random access contention resolution timer expires and no physical downlink control channel PDCCH for retransmission of the scheduling message Msg3 is received before the random access contention resolution timer expires. unsuccessful.
  • the random access contention resolution timer is started or restarted in the first time domain symbol after sending the Msg3.
  • the random access contention resolution timer is started or restarted at the first time domain symbol after the first time offset of sending the Msg3.
  • the random access contention resolution timer is started or restarted in the subframe where the last repeated transmission of the first physical uplink shared channel PUSCH is located, wherein the first PUSCH is used to carry the Msg3.
  • the random access contention resolution timer is started or restarted after the subframe where the last repeated transmission of the second PUSCH is located plus the first time offset, wherein the second PUSCH uses to carry the Msg3.
  • the processing unit 410 is further configured to:
  • the temporary cell radio network temporary identifier TC-RNTI is discarded, where , the TC-RNTI is used to scramble the PDCCH.
  • the processing unit 410 is further configured to:
  • the contention resolution timer expires, and the PDCCH scheduling the retransmission of Msg3 is received before the random access contention resolution timer expires, the contention resolution is not considered to be failed.
  • the terminal device 400 further includes:
  • a communication unit configured to retransmit the Msg3 when the PDCCH scheduling the retransmission of Msg3 is received before the random access contention resolution timer expires;
  • the processing unit 410 is further configured to: restart the random access contention resolution timer after retransmitting the first time offset of the Msg3;
  • the communication unit is further configured to: monitor the PDCCH scrambled by the cell radio network temporary identifier C-RNTI or TC-RNTI sent by the network device during the operation of the random access contention resolution timer.
  • the first time offset is determined according to a round-trip time delay RTT between the terminal device and the network device.
  • the terminal device is a terminal device in a non-terrestrial network NTN system, or the terminal device is a terminal device in a TN system.
  • the terminal when the random access contention resolution timer expires and the PDCCH for retransmission of the scheduling message Msg3 is not received before the random access contention resolution timer expires, the terminal The device considers that the contention resolution is unsuccessful; and/or, when the random access contention resolution timer expires and receives the PDCCH for retransmission of the scheduling message Msg3 before the random access contention resolution timer expires, the terminal device does not It is considered that the contention resolution has failed, and further according to the reception of Msg4 after the retransmission of Msg3, it is judged whether the contention resolution is successful, which is conducive to avoiding the situation that the terminal device considers that the contention resolution has failed when the random access contention resolution timer expires, resulting in frequent initiation of random access problem, reducing the random access delay and improving the success rate of random access.
  • 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 400 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 each unit in the terminal device 400 are to realize the For the sake of brevity, the corresponding process of the terminal device in the shown method 200 will not be repeated here.
  • FIG. 9 is a schematic structural diagram of a communication device 600 provided by an embodiment of the present application.
  • the communication device 600 shown in FIG. 9 includes a processor 610, and the processor 610 can invoke and run a computer program from a memory, so as to implement the method in the embodiment of the present application.
  • the communication device 600 may further include a memory 620 .
  • the processor 610 can invoke and run a computer program from the memory 620, so as to implement the method in the embodiment of the present application.
  • the memory 620 may be an independent device independent of the processor 610 , or may be integrated in the processor 610 .
  • the communication device 600 may further include a transceiver 630, and the processor 610 may control the transceiver 630 to communicate with other devices, specifically, to send information or data to other devices, or receive other Information or data sent by the device.
  • the transceiver 630 may include a transmitter and a receiver.
  • the transceiver 630 may further include antennas, and the number of antennas may be one or more.
  • the communication device 600 may specifically be the network device of the embodiment of the present application, and the communication device 600 may implement the corresponding processes implemented by the network device in each method of the embodiment of the present application. For the sake of brevity, details are not repeated here. .
  • the communication device 600 may specifically be the mobile terminal/terminal device of the embodiment of the present application, and the communication device 600 may implement the corresponding processes implemented by the mobile terminal/terminal device in each method of the embodiment of the present application, for the sake of brevity , which will not be repeated here.
  • FIG. 10 is a schematic structural diagram of a chip according to an embodiment of the present application.
  • the chip 700 shown in FIG. 10 includes a processor 710, and the processor 710 can call and run a computer program from a memory, so as to implement the method in the embodiment of the present application.
  • the chip 700 may further include a memory 720 .
  • the processor 710 can invoke and run a computer program from the memory 720, so as to implement the method in the embodiment of the present application.
  • the memory 720 may be an independent device independent of the processor 710 , or may be integrated in the processor 710 .
  • the chip 700 may also include an input interface 730 .
  • the processor 710 may control the input interface 730 to communicate with other devices or chips, specifically, may obtain information or data sent by other devices or chips.
  • the chip 700 may also include an output interface 740 .
  • the processor 710 can control the output interface 740 to communicate with other devices or chips, specifically, can output information or data to other devices or chips.
  • the chip can be applied to the network device in the embodiment of the present application, and the chip can implement the corresponding processes implemented by the network device in the methods of the embodiment of the present application.
  • the chip can implement the corresponding processes implemented by the network device in the methods of the embodiment of the present application.
  • the chip can be applied to the mobile terminal/terminal device in the embodiments of the present application, and the chip can implement the corresponding processes implemented by the mobile terminal/terminal device in the various methods of the embodiments of the present application.
  • the chip can implement the corresponding processes implemented by the mobile terminal/terminal device in the various methods of the embodiments of the present application.
  • the chip can implement the corresponding processes implemented by the mobile terminal/terminal device in the various methods of the embodiments of the present application.
  • the chip can be applied to the mobile terminal/terminal device in the embodiments of the present application, and the chip can implement the corresponding processes implemented by the mobile terminal/terminal device in the various methods of the embodiments of the present application.
  • the chip mentioned in the embodiment of the present application may also be called a system-on-chip, a system-on-chip, a system-on-a-chip, or a system-on-a-chip.
  • Fig. 11 is a schematic block diagram of a communication system 900 provided by an embodiment of the present application. As shown in FIG. 11 , the communication system 900 includes a terminal device 910 and a network device 920 .
  • the terminal device 910 can be used to realize the corresponding functions realized by the terminal device in the above method
  • the network device 920 can be used to realize the corresponding functions realized by the network device in the above method.
  • the processor in the embodiment of the present application may be an integrated circuit chip, which has a signal processing capability.
  • each step of the above-mentioned method embodiments may be completed by an integrated logic circuit of hardware in a processor or instructions 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 Program 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 connection with the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor.
  • the software module may be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, register.
  • the storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps of the above method in combination with its hardware.
  • the memory in the embodiments of the present application may be a volatile memory or a nonvolatile memory, or may include both volatile and nonvolatile memories.
  • the non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), electronically programmable Erase Programmable Read-Only Memory (Electrically EPROM, EEPROM) or Flash.
  • the volatile memory can be Random Access Memory (RAM), which acts as external cache memory.
  • RAM Static Random Access Memory
  • SRAM Static Random Access Memory
  • DRAM Dynamic Random Access Memory
  • Synchronous Dynamic Random Access Memory Synchronous Dynamic Random Access Memory
  • SDRAM double data rate synchronous dynamic random access memory
  • Double Data Rate SDRAM, DDR SDRAM enhanced synchronous dynamic random access memory
  • Enhanced SDRAM, ESDRAM synchronous connection dynamic random access memory
  • Synchlink DRAM, SLDRAM Direct Memory Bus Random Access Memory
  • 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), etc. That is, the memory in the embodiments of the present application is intended to include, but not be limited to, these and any other suitable types of memory.
  • the embodiment of the present application also provides a computer-readable storage medium for storing computer programs.
  • the computer-readable storage medium can be applied to the network device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the network device in the methods of the embodiments of the present application.
  • the computer program enables the computer to execute the corresponding processes implemented by the network device in the methods of the embodiments of the present application.
  • the computer-readable storage medium can be applied to the mobile terminal/terminal device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the mobile terminal/terminal device in the various methods of the embodiments of the present application , for the sake of brevity, it is not repeated here.
  • the embodiment of the present application also provides a computer program product, including computer program instructions.
  • the computer program product may be applied to the network device in the embodiment of the present application, and the computer program instructions cause the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application.
  • the Let me repeat for the sake of brevity, the Let me repeat.
  • 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 the methods of the embodiments of the present application, For the sake of brevity, details are not repeated here.
  • the embodiment of the present application also provides a computer program.
  • the computer program can be applied to the network device in the embodiment of the present application.
  • the computer program executes the corresponding process implemented by the network device in each method of the embodiment of the present application.
  • the computer program executes the corresponding process implemented by the network device in each method of the embodiment of the present application.
  • the computer program can be applied to the mobile terminal/terminal device in the embodiment of the present application.
  • the computer program executes each method in the embodiment of the present application to be implemented by the mobile terminal/terminal device
  • the corresponding process will not be repeated here.
  • the disclosed systems, devices and methods may be implemented in other ways.
  • the device 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 can be combined or May be integrated into another system, or some features may be ignored, or not implemented.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit.
  • the functions described above are realized in the form of software function units and sold or used as independent products, they can be stored in a computer-readable storage medium.
  • the technical solution of the present application is essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disc and other media that can store program codes. .

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Abstract

一种无线通信的方法和终端设备，该方法包括：在随机接入竞争解决定时器超时，并且在所述随机接入竞争解决定时器超时之前未收到调度消息Msg3重传的物理下行控制信道PDCCH的情况下，终端设备认为竞争解决不成功；和/或，在所述随机接入竞争解决定时器超时，并且在所述随机接入竞争解决定时器超时之前收到调度Msg3重传的PDCCH的情况下，所述终端设备不认为竞争解决失败。有利于避免终端设备在随机接入竞争解决定时器超时时即认为竞争解决失败导致频繁发起随机接入的问题，降低了随机接入时延，提升了随机接入成功率。

Description

无线通信的方法和终端设备 技术领域
本申请实施例涉及通信领域，具体涉及一种无线通信的方法和终端设备。
背景技术
在基于竞争的随机接入过程中，终端设备在每次发送消息3(Msg3)之后，终端设备将启动或重启随机接入竞争解决定时器(ra-ContentionResolutionTimer)，并在该定时器运行时间内监听物理下行控制信道(Physical Downlink Control Channel，PDCCH)，以接收消息4(Msg4)。如果直到ra-ContentionResolutionTimer超时，终端设备都没有接收到小区无线网络临时标识(Cell Radio Network Temporary Identifier，C-RNTI)或者临时小区无线网络临时标识符(Temporary Cell Radio Network Temporary Identity，TC-RNTI)加扰的PDCCH，则认为本次随机接入失败，终端设备会重新尝试发起随机接入。
在地面通信网络(Terrestrial Networks，TN)系统中，终端设备在发送完Msg3之后都会启动或重启ra-ContentionResolutionTimer，并在该定时器运行时间内监听PDCCH。终端设备只有在收到Msg4的时候才会停止ra-ContentionResolutionTimer。而在收到调度Msg3重传的PDCCH的情况下，终端设备会在发送完Msg3重传之后重启该定时器ra-ContentionResolutionTimer。
非地面网络(Non-Terrestrial Networks，NTN)系统中，终端设备与网络设备之间的往返时间(Round Trip Time，RTT)大幅增加，为了避免终端设备不必要的PDCCH监听，考虑对于NTN系统中的ra-ContentionResolutionTimer启动时刻引入了一个时间偏移量。导致基于Msg3重传启动的ra-ContentionResolutionTimer和基于Msg3初传启动的ra-ContentionResolutionTimer之间可能存在较大的时间偏移，也就是说，在基于Msg3重传重启ra-ContentionResolutionTimer之前，基于Msg3初传启动的ra-ContentionResolutionTimer已超时，进而终端设备判定为竞争解决失败，终端设备需要重新尝试随机接入，增加了随机接入时延。
发明内容
本申请提供了一种无线通信的方法和终端设备，有利于避免终端设备频繁发起随机接入，降低随机接入时延，提升随机接入成功率。
第一方面，提供了一种无线通信的方法，包括：在随机接入竞争解决定时器超时，并且在所述随机接入竞争解决定时器超时之前未收到调度消息Msg3重传的物理下行控制信道PDCCH的情况下，终端设备认为竞争解决不成功。
第二方面，提供了一种终端设备，用于执行上述第一方面或其各实现方式中的方法。
具体地，该终端设备包括用于执行上述第一方面或其各实现方式中的方法的功能模块。
第三方面，提供了一种终端设备，包括处理器和存储器。该存储器用于存储计算机程序，该处理器用于调用并运行该存储器中存储的计算机程序，执行上述第一方面或其各实现方式中的方法。
第四方面，提供了一种芯片，用于实现上述第一方面或其各实现方式中的方法。
具体地，该芯片包括：处理器，用于从存储器中调用并运行计算机程序，使得安装有该装置的设备执行如上述第一方面或其各实现方式中的方法。
第五方面，提供了一种计算机可读存储介质，用于存储计算机程序，该计算机程序使得计算机执行上述第一方面或其各实现方式中的方法。
第六方面，提供了一种计算机程序产品，包括计算机程序指令，所述计算机程序指令使得计算机执行上述第一方面或其各实现方式中的方法。
第七方面，提供了一种计算机程序，当其在计算机上运行时，使得计算机执行上述第一方面或其各实现方式中的方法。
通过上述技术方案，在随机接入竞争解决定时器超时，并且在所述随机接入竞争解决定时器超时之前未收到调度消息Msg3重传的PDCCH的情况下，终端设备认为竞争解决不成功；和/或，在随机接入竞争解决定时器超时，并且在所述随机接入竞争解决定时器超时之前收到调度消息Msg3重传的PDCCH的情况下，终端设备不认为竞争解决失败，进一步根据重传Msg3后的Msg4的接收情况，判断是否竞争解决成功，有利于避免终端设备在随机接入竞争解决定时器超时时即认为竞争解决失败导致频繁发起随机接入的问题，降低了随机接入时延，提升了随机接入成功率。
附图说明
图1A-图1C是本申请实施例提供的一种通信系统架构的示意性图。
图2是基于透明转发卫星的NTN系统架构图。
图3是基于再生转发卫星的NTN系统架构图。
图4是四步随机接入过程的示意图。
图5是相关技术中的随机接入竞争解决的判断机制的示意图。
图6是本申请实施例提供的一种无线通信的方法的示意性图。
图7是根据本申请实施例提供的一种随机接入竞争解决的判断机制的示意图。
图8是根据本申请实施例的终端设备的示意性框图。
图9是本申请另一实施例提供的一种通信设备的示意性框图。
图10是本申请实施例提供的一种芯片的示意性框图。
图11是本申请实施例提供的一种通信系统的示意性框图。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行描述，显然，所描述的实施例是本申请一部分实施例，而不是全部的实施例。针对本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
本申请实施例的技术方案可以应用于各种通信系统，例如：全球移动通讯(Global System of Mobile communication，GSM)系统、码分多址(Code Division Multiple Access，CDMA)系统、宽带码分多址(Wideband Code Division Multiple Access，WCDMA)系统、通用分组无线业务(General Packet Radio Service，GPRS)、长期演进(Long Term Evolution，LTE)系统、先进的长期演进(Advanced long term evolution，LTE-A)系统、新无线(New Radio，NR)系统、NR系统的演进系统、非授权频谱上的LTE(LTE-based access to unlicensed spectrum，LTE-U)系统、非授权频谱上的NR(NR-based access to unlicensed spectrum，NR-U)系统、非地面通信网络(Non-Terrestrial Networks，NTN)系统、通用移动通信系统(Universal Mobile Telecommunication System，UMTS)、无线局域网(Wireless Local Area Networks，WLAN)、无线保真(Wireless Fidelity，WiFi)、第五代通信(5th-Generation，5G)系统或其他通信系统等。
通常来说，传统的通信系统支持的连接数有限，也易于实现，然而，随着通信技术的发展，移动通信系统将不仅支持传统的通信，还将支持例如，设备到设备(Device to Device，D2D)通信，机器到机器(Machine to Machine，M2M)通信，机器类型通信(Machine Type Communication，MTC)，车辆间(Vehicle to Vehicle，V2V)通信，或车联网(Vehicle to everything，V2X)通信等，本申请实施例也可以应用于这些通信系统。
本申请实施例中的通信系统可以应用于载波聚合(Carrier Aggregation，CA)场景，也可以应用于双连接(Dual Connectivity，DC)场景，还可以应用于独立(Standalone，SA)布网场景。
本申请实施例中的通信系统可以应用于非授权频谱，其中，非授权频谱也可以认为是共享频谱；或者，本申请实施例中的通信系统也可以应用于授权频谱，其中，授权频谱也可以认为是非共享频谱。
本申请实施例可应用于非地面通信网络(Non-Terrestrial Networks，NTN)系统，也可应用于地面通信网络(Terrestrial Networks，TN)系统。
本申请实施例结合网络设备和终端设备描述了各个实施例，其中，终端设备也可以称为用户设备(User Equipment，UE)、接入终端、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、用户终端、终端、无线通信设备、用户代理或用户装置等。
终端设备可以是WLAN中的站点(STATION，ST)，可以是蜂窝电话、无绳电话、会话启动协议(Session Initiation Protocol，SIP)电话、无线本地环路(Wireless Local Loop，WLL)站、个人数字处理(Personal Digital Assistant，PDA)设备、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备、下一代通信系统例如NR网络中的终端设备，或者未来演进的公共陆地移动网络(Public Land Mobile Network，PLMN)网络中的终端设备等。
在本申请实施例中，终端设备可以部署在陆地上，包括室内或室外、手持、穿戴或车载；也可以部署在水面上(如轮船等)；还可以部署在空中(例如飞机、气球和卫星上等)。
在本申请实施例中，终端设备可以是手机(Mobile Phone)、平板电脑(Pad)、带无线收发功能的电脑、虚拟现实(Virtual Reality，VR)终端设备、增强现实(Augmented Reality，AR)终端设备、工业控制(industrial control)中的无线终端设备、无人驾驶(self driving)中的无线终端设备、远程医疗(remote medical)中的无线终端设备、智能电网(smart grid)中的无线终端设备、运输安全(transportation safety)中的无线终端设备、智慧城市(smart city)中的无线终端设备或智慧家庭(smart home)中的无线终端设备等。本申请实施例所涉及的终端设备还可以称为终端、用户设备(user  equipment，UE)、接入终端设备、车载终端、工业控制终端、UE单元、UE站、移动站、移动台、远方站、远程终端设备、移动设备、UE终端设备、无线通信设备、UE代理或UE装置等。终端设备也可以是固定的或者移动的。
作为示例而非限定，在本申请实施例中，该终端设备还可以是可穿戴设备。可穿戴设备也可以称为穿戴式智能设备，是应用穿戴式技术对日常穿戴进行智能化设计、开发出可以穿戴的设备的总称，如眼镜、手套、手表、服饰及鞋等。可穿戴设备即直接穿在身上，或是整合到用户的衣服或配件的一种便携式设备。可穿戴设备不仅仅是一种硬件设备，更是通过软件支持以及数据交互、云端交互来实现强大的功能。广义穿戴式智能设备包括功能全、尺寸大、可不依赖智能手机实现完整或者部分的功能，例如：智能手表或智能眼镜等，以及只专注于某一类应用功能，需要和其它设备如智能手机配合使用，如各类进行体征监测的智能手环、智能首饰等。
在本申请实施例中，网络设备可以是用于与移动设备通信的设备，网络设备可以是WLAN中的接入点(Access Point，AP)，GSM或CDMA中的基站(Base Transceiver Station，BTS)，也可以是WCDMA中的基站(NodeB，NB)，还可以是LTE中的演进型基站(Evolutional Node B，eNB或eNodeB)，或者中继站或接入点，或者车载设备、可穿戴设备以及NR网络中的网络设备(gNB)或者未来演进的PLMN网络中的网络设备或者NTN网络中的网络设备等。
作为示例而非限定，在本申请实施例中，网络设备可以具有移动特性，例如网络设备可以为移动的设备。在本申请一些实施例中，网络设备可以为卫星、气球站。例如，卫星可以为低地球轨道(low earth orbit，LEO)卫星、中地球轨道(medium earth orbit，MEO)卫星、地球同步轨道(geostationary earth orbit，GEO)卫星、高椭圆轨道(High Elliptical Orbit，HEO)卫星等。在本申请一些实施例中，网络设备还可以为设置在陆地、水域等位置的基站。
在本申请实施例中，网络设备可以为小区提供服务，终端设备通过该小区使用的传输资源(例如，频域资源，或者说，频谱资源)与网络设备进行通信，该小区可以是网络设备(例如基站)对应的小区，小区可以属于宏基站，也可以属于小小区(Small cell)对应的基站，这里的小小区可以包括：城市小区(Metro cell)、微小区(Micro cell)、微微小区(Pico cell)、毫微微小区(Femto cell)等，这些小小区具有覆盖范围小、发射功率低的特点，适用于提供高速率的数据传输服务。
示例性的，图1A为本申请实施例提供的一种通信系统的架构示意图。如图1A所示，通信系统100可以包括网络设备110，网络设备110可以是与终端设备120(或称为通信终端、终端)通信的设备。网络设备110可以为特定的地理区域提供通信覆盖，并且可以与位于该覆盖区域内的终端设备进行通信。
图1A示例性地示出了一个网络设备和两个终端设备，在本申请一些实施例中，该通信系统100可以包括多个网络设备并且每个网络设备的覆盖范围内可以包括其它数量的终端设备，本申请实施例对此不做限定。
示例性的，图1B为本申请实施例提供的另一种通信系统的架构示意图。请参见图1B，包括终端设备1101和卫星1102，终端设备1101和卫星1102之间可以进行无线通信。终端设备1101和卫星1102之间所形成的网络还可以称为NTN。在图1B所示的通信系统的架构中，卫星1102可以具有基站的功能，终端设备1101和卫星1102之间可以直接通信。在系统架构下，可以将卫星1102称为网络设备。在本申请一些实施例中，通信系统中可以包括多个网络设备1102，并且每个网络设备1102的覆盖范围内可以包括其它数量的终端设备，本申请实施例对此不做限定。
示例性的，图1C为本申请实施例提供的另一种通信系统的架构示意图。请参见图1C，包括终端设备1201、卫星1202和基站1203，终端设备1201和卫星1202之间可以进行无线通信，卫星1202与基站1203之间可以通信。终端设备1201、卫星1202和基站1203之间所形成的网络还可以称为NTN。在图1C所示的通信系统的架构中，卫星1202可以不具有基站的功能，终端设备1201和基站1203之间的通信需要通过卫星1202的中转。在该种系统架构下，可以将基站1203称为网络设备。在本申请一些实施例中，通信系统中可以包括多个网络设备1203，并且每个网络设备1203的覆盖范围内可以包括其它数量的终端设备，本申请实施例对此不做限定。
需要说明的是，图1A-图1C只是以示例的形式示意本申请所适用的系统，当然，本申请实施例所示的方法还可以适用于其它系统，例如，5G通信系统、LTE通信系统等，本申请实施例对此不作具体限定。
在本申请一些实施例中，图1A-图1C所示的无线通信系统还可以包括移动性管理实体(Mobility Management Entity，MME)、接入与移动性管理功能(Access and Mobility Management Function，AMF)等其他网络实体，本申请实施例对此不作限定。
应理解，本申请实施例中网络/系统中具有通信功能的设备可称为通信设备。以图1A示出的通信 系统100为例，通信设备可包括具有通信功能的网络设备110和终端设备120，网络设备110和终端设备120可以为上文所述的具体设备，此处不再赘述；通信设备还可包括通信系统100中的其他设备，例如网络控制器、移动管理实体等其他网络实体，本申请实施例中对此不做限定。
应理解，本文中术语“系统”和“网络”在本文中常被可互换使用。本文中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
应理解，在本申请的实施例中提到的“指示”可以是直接指示，也可以是间接指示，还可以是表示具有关联关系。举例说明，A指示B，可以表示A直接指示B，例如B可以通过A获取；也可以表示A间接指示B，例如A指示C，B可以通过C获取；还可以表示A和B之间具有关联关系。
在本申请实施例的描述中，术语“对应”可表示两者之间具有直接对应或间接对应的关系，也可以表示两者之间具有关联关系，也可以是指示与被指示、配置与被配置等关系。
在本申请一些实施例中，"预定义的"可以通过在设备(例如，包括终端设备和网络设备)中预先保存相应的代码、表格或其他可用于指示相关信息的方式来实现，本申请对于其具体的实现方式不做限定。比如预定义的可以是指协议中定义的。
在本申请一些实施例中，所述"协议"可以指通信领域的标准协议，例如可以包括LTE协议、NR协议以及应用于未来的通信系统中的相关协议，本申请对此不做限定。
在一些场景中，卫星从其提供的功能上可以包括透明转发(transparent payload)和再生转发(regenerative payload)两种。对于透明转发卫星，只提供无线频率滤波，频率转换和放大的功能，只提供信号的透明转发，不会改变其转发的波形信号。对于再生转发卫星，除了提供无线频率滤波，频率转换和放大的功能，还可以提供解调/解码，路由/转换，编码/调制的功能，其具有基站的部分或者全部功能。
作为示例而非限定，图2是基于透明转发卫星的系统架构图，图3是基于再生转发卫星的系统架构图。
如图2所示，对于基于透明转发卫星的NTN系统，包括NTN网关(Gateway)和卫星，该NTN网关和卫星可以认为组成远端无线单元(Remote Radio Unit)，用于终端设备和TN系统中的接入网设备(例如gNB)之间的通信，相当于远端无线单元提供NR Uu接口的功能用于终端设备和接入网设备之间的通信。在一些实施例中，NTN网关和卫星之间通过馈电链路(Feeder link)进行通信，卫星和终端设备之间可以通过服务链路(service link)进行通信。
进一步地，TN系统中的接入网设备(例如gNB)通过下一代(Next Geration，NG)接口与5G核心网(Core Network，CN)通信，5G CN通过N6接口与数据网络(Data Network)通信。其中，NTN系统和TN系统的接入网设备组成下一代接入网(NG-RAN)。
如图3所示，对于基于再生转发卫星的NTN系统，也可以包括NTN和卫星，与基于透传转发卫星的NTN系统不同的是，卫星和卫星之间可以进行通信，具体地，卫星和卫星之间通过卫星无线接口(satellite radio inferface，SRI)，或者说，星间链路(InterStar link)进行通信。
在一些场景中，卫星可以作为接入网设备与终端设备进行通信，例如卫星可以通过NR Uu接口与终端设备进行通信。卫星可以通过NG接口与5G CN通信，5G CN通过N6接口与数据网络。可以认为NTN系统组成下一代接入网(NG-RAN)。
应当理解，图1至图3仅为本申请应用场景的示例，不应理解为对本申请的限制。
例如，在其他可替代实施例中，NTN系统还可包括无人机系统(Unmanned Aircraft System)。
具体地，可以将图2至图3中的卫星替换为UAS平台。例如，UAS平台包括但不限于高空平台站(High Altitude Platform Station，HAPS)。
在一些场景中，随机接入过程主要由如下事件触发：
终端设备初始接入时建立无线连接：待识别从无线资源控制(Radio Resource Control，RRC)空闲(RRC_IDLE)态到RRC连接(RRC_CONNECTED)态；
RRC连接重建过程：以便UE在无线链路失败后重建无线连接；
切换：终端设备需要与新的小区建立上行同步；
RRC_CONNECTED态下，下行链路(DownLink，DL)数据到达，此时上行链路(UpLink，UL)处于失步状态；
RRC_CONNECTED态下，上行链路(UpLink，UL)数据到达，此时UL处于失步状态或者没有用于发送调度请求(Scheduling Request，SR)的物理上行控制信道(Physical Uplink Control Channel，PUCCH)资源；
SR失败；
来自RRC的同步重配置请求；
UE从RRC非激活态(RRC_INACTIVE)态转换为RRC_CONNECTED态；
在辅小区(SCell)添加过程中建立时间校准；
请求其他系统信息(System Information，SI)；
波束失败恢复。
在NR系统中，支持四步随机接入过程，具体包括消息1(Msg1)-消息4(Msg4)的发送过程。作为一个示例，如图4所示，四步随机接入过程包括如下步骤：
步骤1，终端设备向网络设备发送随机接入前导码(Preamble，也即Msg 1)。
其中，随机接入前导码也可以称为前导码、随机接入前导码序列、前导码序列等。
具体而言，终端设备可以选择物理随机接入信道(Physical Random Access Channel，PRACH)资源，PRACH资源可以包括时域资源、频域资源和码域资源。网络设备通过广播系统信息块(System Information Block，SIB)1向终端设备发送随机接入相关参数，其中随机接入公共配置信息元素(RACH-ConfigCommon IE)中的针对同步信号块(Synchronization Signal Block，SSB)的参考信号接收功率(Reference Signal Receiving Power，RSRP)门限值(rsrp-ThresholdSSB)用于终端设备进行SSB选择，终端设备将每个SSB下的RSRP测量结果与rsrp-ThresholdSSB进行对比，选择测量值高于所配置门限值的SSB进行接入，若没有满足配置门限值的SSB，则从全部SSB中随机选择一个进行接入。每个SSB对应一组随机接入前导码(Preamble)资源和随机接入时机(RACH Occasion，RO)资源，终端设备从选定的SSB中用于基于竞争的随机接入资源中进行随机选择，将Preamble索引(PREAMBLE_INDEX)设置为选定的随机接入Preamble。网络设备可以根据Preamble估计其与终端设备之间的传输时延并以此校准上行定时(timing)，以及可以大体确定终端设备传输Msg 3所需要的资源大小。为了让网络设备可以更准确的了解到待传输的Msg 3的大小以分配合适的上行资源，将Preamble分为Preamble组(group)A和Preamble group B，若随机接入资源中存在Preamble group B，终端设备可以根据Msg 3的大小以及路损(pathloss)对Preamble group进行选择。
步骤2，网络设备向终端设备发送随机接入响应(Random Access Response，RAR，也即Msg 2)
终端设备向网络设备发送Preamble后，可以开启一个随机接入响应窗口(ra-ResponseWindow)，在该ra-ResponseWindow内根据随机访问无线网络临时标识符(Random Access Radio Network Temporary Identifier，RA-RNTI)检测对应的PDCCH。其中，RA-RNTI跟终端设备发送Msg1所使用的PRACH时频资源有关。
终端设备成功接收到RA-RNTI加扰的PDCCH之后，终端设备能够获得该PDCCH调度的PDSCH，其中包含RAR，RAR具体包含以下信息：
RAR的子头(subheader)中包含退避指示(Back-off Indicator，BI)，用于指示重传Msg1的回退时间；
RAR中的随机访问序列标识符(Random Access Preamble Identifier，RAPID)：网络设备对收到的PREAMBLE_INDEX的响应；
RAR的数据(payload)中包含了定时提前组(Timing Advance Group，TAG)，用于调整上行定时；
上行授权(UL grant)：用于调度Msg3的上行资源指示；
临时小区RNTI(Temporary C-RNTI，TC-RNTI)：用于加扰调度Msg4的PDCCH(用于初始接入)，也可以用于加扰调度Msg3重传的PDCCH。
如果终端设备接收到RAR-RNTI加扰的PDCCH，并且RAR中包含了在Msg1中发送的PREAMBLE_INDEX，则终端设备认为成功接收了RAR。
若终端设备检测到RA-RNTI加扰的PDCCH后，可以获得该PDCCH调度的物理下行共享信道(Physical Downlink Shared Channel，PDSCH)。其中，该PDSCH中包括Preamble对应的RAR。
若在ra-ResponseWindow运行期间没有接收到RA-RNTI加扰的PDCCH，或接收到了RA-RNTI加扰的PDCCH，但RAR中不包含与PREAMBLE_INDEX对应的RAPID，上述两种情况出现时则认为RAR接收失败，此时，若Preamble的传输次数没有超过网络配置的最大传输次数(preambleTransMax)，也即Msg1的最大传输次数门限，终端设备需要对Msg 1进行重传，若Preamble的传输次数超过了网络配置的最大传输次数(preambleTransMax)，终端设备向高层上报随机接入问题。
步骤3，终端设备发送Msg 3。
终端设备在收到RAR消息后，判断该RAR是否为属于自己的RAR消息，例如终端设备可以利 用前导码索引进行核对，在确定是属于自己的RAR消息后，可以在RRC层产生Msg 3，并向网络设备发送Msg 3，其中需要携带终端设备的标识信息等。
Msg 3主要用于通知网络设备该随机接入的触发事件。针对不同的随机接入触发事件，终端设备在步骤3中发送的Msg 3可以包括不同的内容，具体地，Msg3中可以携带终端标识(即竞争解决标识，用于步骤4的竞争解决)和建立理由(establishment cause)。
例如，对于初始接入的场景，Msg 3可以包括RRC层生成的RRC连接请求消息(RRC Setup Request)。此外，Msg 3还可以携带例如终端设备的5G-服务临时移动用户标识(Serving-Temporary Mobile Subscriber Identity，S-TMSI)或随机数等。
又例如，对于RRC连接重建场景，Msg 3可以包括RRC层生成的RRC连接重建请求消息(RRC Reestabilshment Request)。此外，Msg 3还可以携带例如小区无线网络临时标识(Cell Radio Network Temporary Identifier，C-RNTI)等。
又例如，对于切换场景，Msg 3可以包括RRC层生成的RRC切换确认消息(RRC Handover Confirm)，其携带终端设备的C-RNTI。此外，Msg 3还可携带例如缓冲状态报告(Buffer Status Report，BSR)等信息。对于其它触发事件例如上/下行数据到达的场景，Msg3至少可以包括终端设备的C-RNTI。
在一些实施例中，Msg3支持混合自动重传请求(Hybrid Automatic Repeat reQuest，HARQ)重传。
Msg3通过物理上行共享信道(Physical Uplink Shared Channel，PUSCH)承载，Msg2中的RAR承载用于Msg3的初次传输的PUSCH的UL grant，RAR中承载的UL grant称为RAR UL grant。RAR UL grant信息承载的信息可以包括PUSCH的时域和频域资源分配信息，功率控制命令TPC，跳频，和MCS等。
如果网络设备没有正确收到Msg3，会通过DCI指示Msg3的重传的调度信息，例如通过临时小区无线网络临时标识符(Temporary Cell Radio Network Temporary Identity，TC-RNTI)加扰的DCI format 0_0承载，除了RAR UL grant包含的内容之外，还包括新数据指示(New Data Indicator，NDI)，冗余版本，HARQ进程号。
步骤4，网络设备向终端设备发送竞争解决消息(contention resolution)，即Msg 4。
终端设备在每次发送Msg3之后,会启动或重启随机接入竞争解决启定时器(ra-ContentionResolutionTimer)，在ra-ContentionResolutionTimer运行期间，监测C-RNTI或者TC-RNTI加扰的PDCCH。
Msg4主要有两个作用：一个是用于竞争冲突解决，另一个是网络设备向终端设备传输RRC配置消息。竞争冲突解决主要有以下两种方式：一种是：如果终端设备在Msg3中携带了C-RNTI，则Msg4用C-RNTI加扰的PDCCH调度。另一种是：如果终端设备在Msg3中没有携带C-RNTI，比如初始接入场景，则Msg4采用TC-RNTI加扰的PDCCH调度，终端设备接收到承载Msg4的PDSCH，通过匹配PDSCH中的公共控制信道(common control channel，CCCH)服务数据单元(service data unit，SDU)中的竞争解决标识确定竞争是否解决，或者说，竞争解决是否成功。
对于基于竞争的随机接入过程，终端设备在每次发送Msg3之后，终端设备会启动或重启定时器ra-ContentionResolutionTimer，并在该定时器ra-ContentionResolutionTimer运行时间内监听PDCCH，以接收Msg4。如果直到ra-ContentionResolutionTimer超时，终端设备都没有接收到C-RNTI或者TC-RNTI加扰的PDCCH，则认为本次随机接入失败，终端设备会重新发起随机接入，即重新发送Msg1。当终端设备发送Msg1的次数达到一定门限后，终端设备会向高层指示出现了随机接入的问题。
在TN系统中，终端设备在发送完Msg3之后都会启动或重启ra-ContentionResolutionTimer，并在该定时器ra-ContentionResolutionTimer运行时间内监听PDCCH。与TN系统相比，NTN系统中，终端设备与网络设备之间的往返时间(Round Trip Time，RTT)大幅增加，为了避免终端设备不必要的PDCCH监听，对于NTN系统中的ra-ContentionResolutionTimer启动时刻引入了一个时间偏移量。
在相关技术中，终端设备只有在接收到Msg4的时候才会停止ra-ContentionResolutionTimer。而在接收到调度Msg3重传的PDCCH的情况下，终端设备会在完成Msg3重传之后重启该定时器ra-ContentionResolutionTimer。在NTN系统中，由于ra-ContentionResolutionTimer的启动时间延后了一个时间偏移量，而在终端设备完成Msg3重传之后至重启ra-ContentionResolutionTimer之前的这一段时间内，ra-ContentionResolutionTimer已超时，进而终端设备会认为竞争解决失败，进而重新尝试随机接入，增加了随机接入时延。
结合图5，说明上述判断机制存在的问题。
如图5所示，终端设备在t1时刻进行Msg3的初传，并在完成所述Msg3初传，并经历第一时间间隔之后的t2时刻启动ra-ContentionResolutionTimer。
终端设备在t3时刻收到TC-RNTI加扰的PDCCH指示Msg3重传，该PDCCH指示Msg3重传发生在t5时刻。ra-ContentionResolutionTimer在t4时刻超时，此情况下，终端设备认为竞争解决失败，需要重新尝试随机接入，增加了随机接入时延，降低了随机接入成功率。
为便于理解本申请实施例的技术方案，以下通过具体实施例详述本申请的技术方案。以上相关技术作为可选方案与本申请实施例的技术方案可以进行任意结合，其均属于本申请实施例的保护范围。本申请实施例包括以下内容中的至少部分内容。
图6是根据本申请实施例的无线通信的方法200的示意性图，如图6所示，该方法200包括如下内容：
S210，在随机接入竞争解决定时器(ra-ContentionResolutionTimer)超时，并且在所述随机接入竞争解决定时器超时之前未收到调度消息Msg3重传的物理下行控制信道PDCCH的情况下，终端设备认为(consider)竞争解决不成功。
应理解，本申请实施例可以应用于NTN系统，或者，也可以应用于TN系统，本申请对此不作限定。
换言之，本申请实施例可以应用于可能存在如下问题的系统：
在基于Msg3初传启动的随机接入竞争解决定时器超时之前接收到调度Msg3重传的PDCCH，但是在基于Msg3重传重启随机接入竞争解决定时器之前，或者，在重传Msg3之前，基于Msg3初传启动的随机接入竞争解决定时器已超时。此情况下，如果终端设备认为竞争解决失败，会存在竞争解决的误判。
例如，在NTN系统中，由于随机接入竞争解决定时器的启动增加了一个时间偏移，因此，会导致Msg3重传之前随机接入竞争解决定时器已超时，或者随机接入竞争解决定时器重启之前，上一次启动的随机接入竞争解决定时器已超时，或者，对于TN系统，由于终端设备准备Msg3的时间较长或者其他原因，也有可能导致Msg3重传之前随机接入竞争解决定时器已超时，或者随机接入竞争解决定时器重启之前，上一次启动的随机接入竞争解决定时器已超时。
应理解，在本申请实施例中，TN系统包括但不限于NR系统(或称NR-TN系统)和物联网(Internet of Things，IoT)系统(或称IoT-TN系统)。
在一些实施例中，IoT系统可以包括但不限于窄带物联网(Narrow Band Internet of Things，NB-IoT)系统(或称NB-IoT-TN系统)和增强的机器类型通信(enhanced Machine Type Communication，eMTC)系统(或称eMTC-TN系统)。
在一些实施例中，所述终端设备为TN系统中的UE。例如NR系统中的UE，IoT系统中的UE，作为示例，NB-IoT系统中的UE，或者eMTC系统中的UE。
应理解，在本申请实施例中，NTN系统包括但不限于新无线非地面网络(New Radio NTN，NR-NTN)系统和物联网非地面网络(Internet of Things NTN，IoT-NTN)系统。
在一些实施例中，IoT-NTN系统可以包括以下中的至少一种：
基于NB-IoT的NTN系统，或称，窄带物联网非地面网络(Narrow Band Internet of Things over NTN，NB-IoT-NTN)系统；
基于eMTC的NTN系统，或称，增强的机器类型通信非地面网络(enhanced Machine Type Communication over NTN，eMTC-NTN)系统。
以下，结合具体场景，对随机接入竞争解决定时器的启动或重启时机进行说明。
实施例一：随机接入竞争解决定时器在发送完Msg3之后的第一个时域符号启动或重启。
应理解，这里的发送完Msg3可以指完成Msg3的初传，或者，也可以指完成Msg3的重传。
例如，在完成Msg3的初传后的第一个时域符号上启动ra-ContentionResolutionTimer，在完成Msg3的重传后的第一个时域符号上重启ra-ContentionResolutionTimer。
可选地，该实施例一可以适用于TN系统，例如，NR-TN系统。
例如，对于NR-TN系统，终端设备可以在发送完Msg3之后的第一个时域符号启动或重启ra-ContentionResolutionTimer，或者说，在发送完Msg3之后的下一个时域符号启动或重启ra-ContentionResolutionTimer。
实施例二：随机接入竞争解决定时器在发送完Msg3的第一时间偏移之后的第一个时域符号启动或重启。应理解，这里的发送完Msg3可以指完成Msg3的初传，或者，也可以指完成Msg3的重传。
例如，在完成Msg3的初传后的第一时间偏移之后的第一个时域符号上启动ra-ContentionResolutionTimer，在完成Msg3的重传后的第一时间偏移之后的第一个时域符号上重启ra-ContentionResolutionTimer。
可选地，该实施例二可以适用于NTN系统，例如，NR-NTN系统。
例如，对于NR-NTN系统，终端设备在发送完Msg3之后的第一时间偏移之后的第一个时域符号启动或重启ra-ContentionResolutionTimer。或者说，终端设备在发送完Msg3之后的第一时间偏移之后的下一个时域符号启动或重启ra-ContentionResolutionTimer。
在一些实施例中，所述第一时间偏移根据所述终端设备和网络设备之间的往返时延RTT确定，例如，第一时间偏移可以为终端设备和网络设备之间的RTT，记为UE-gNB RTT。
实施例三：随机接入竞争解决定时器在第一PUSCH的最后一次重复传输所在的子帧启动或重启，其中，所述第一PUSCH用于承载所述Msg3，即第一PUSCH是携带Msg3的PUSCH，或称Msg3PUSCH。
可选地，该实施例三可以适用于TN系统，例如IoT系统，即IoT-TN系统，具体例如NB-IoT系统或eMTC系统。
例如，对于IoT系统，终端设备在完成Msg3 PUSCH的最后一次重复传输所在的子帧启动或重启ra-ContentionResolutionTimer。
实施例四：随机接入竞争解决定时器在第二PUSCH的最后一次重复传输所在的子帧加上第一时间偏移之后启动，其中，所述第二PUSCH用于承载所述消息3。即，第二PUSCH是携带Msg3的PUSCH，或称Msg3 PUSCH。
可选地，该实施例四可以适用于NTN系统，例如IoT-NTN系统，具体例如NB-IoT-NTN系统或eMTC-NTN系统。
例如，对于IoT-NTN系统，终端设备在完成Msg3 PUSCH的最后一次重复传输所在的子帧加上第一时间偏移之后启动或重启ra-ContentionResolutionTimer。即ra-ContentionResolutionTimer的启动或重启时间和Msg3 PUSCH的最后一次传输所在子帧之间间隔第一时间偏移。
在一些实施例中，所述第一时间偏移根据所述终端设备和网络设备之间的往返时延RTT确定。例如，第一时间偏移可以为终端设备和网络设备之间的RTT，记为UE-gNB RTT。
可选地，在该实施例四中，第一时间偏移的单位可以为子帧。
在本申请一些实施例中，所述方法200还包括：
在所述随机接入竞争解决定时器超时，并且在所述随机接入竞争解决定时器超时之前未收到调度Msg3重传的PDCCH的情况下，丢弃TC-RNTI，其中，所述TC-RNTI用于加扰所述PDCCH。
具体地，在所述随机接入竞争解决定时器超时，并且在所述随机接入竞争解决定时器超时之前未收到调度Msg3重传的PDCCH的情况下，终端设备认为竞争解决失败，如果终端设备发送Msg1的次数小于网络设备配置的Msg1的最大传输次数门限，则终端设备会重新发起随机接入过程，因此，终端设备可以丢弃用于加扰调度Msg3重传的PDCCH的RNTI，即TC-RNTI。进一步的，在重新发起的随机接入过程中，网络设备可以通过RAR给终端设备配置新的TC-RNTI，用于加扰调度Msg3重传的PDCCH。
在本申请一些实施例中，所述方法200还包括：
在所述随机接入竞争解决定时器超时，并且在所述随机接入竞争解决定时器超时之前收到调度Msg3重传的PDCCH的情况下，所述终端设备不认为竞争解决失败。
在一些实施例中，在NTN系统中，在所述随机接入竞争解决定时器超时，并且在所述随机接入竞争解决定时器超时之前收到调度Msg3重传的PDCCH的情况下，所述终端设备不认为竞争解决失败。在TN系统中，在所述随机接入竞争解决定时器超时，并且在所述随机接入竞争解决定时器超时之前收到调度Msg3重传的PDCCH的情况下，所述终端设备认为竞争解决失败。
在另一些实施例中，在NTN系统和TN系统中，在所述随机接入竞争解决定时器超时，并且在所述随机接入竞争解决定时器超时之前收到调度Msg3重传的PDCCH的情况下，所述终端设备均不认为竞争解决失败。
进一步地，在终端设备不认为竞争解决失败的情况下，终端设备重传Msg3，并重启随机接入竞争解决定时器，根据随机接入竞争解决定时器运行期间Msg4的接收情况，确定竞争解决是否成功，其中，该随机接入竞争解决定时器的重启时机参考前述实施例一至实施例四中的相关描述，这里不再赘述。
作为示例，在随机接入竞争解决定时器超时之前收到调度Msg3重传的PDCCH的情况下，所述终端设备重传所述Msg3，并在重传所述Msg3的第一时间偏移之后重启随机接入竞争解决定时器，在所述随机接入竞争解决定时器运行期间，所述终端设备监听C-RNTI或TC-RNTI加扰的PDCCH以接收Msg 4。在接收到承载Msg4的PDSCH的情况下，通过匹配PDSCH中的CCCH SDU中的竞争解决标识和Msg3中携带的终端标识确定竞争是否解决，例如，在二者匹配的情况下，认为竞争解决成功，否则，认为竞争解决失败，重新发起随机接入。
结合图7，以NTN场景为例，说明根据本申请实施例提供的随机接入竞争解决的判断机制，但本申请并不限于此。
如图7所示，终端设备在t1时刻进行Msg3的初传，并在完成所述Msg3初传，并经历第一时间间隔之后的t2时刻启动ra-ContentionResolutionTimer。
终端设备在t3时刻接收到TC-RNTI加扰的PDCCH指示Msg3重传，该PDCCH指示Msg3重传的时间在t5时刻。
ra-ContentionResolutionTimer在t4时刻超时，由于终端设备已经在ra-ContentionResolutionTimer超时之前的t3时刻接收到了调度Msg3重传的PDCCH，此时终端设备不认为竞争解决失败。
终端设备在t5时刻进行Msg3的重传，在完成所述Msg3的重传，并经历第一时间间隔之后的t6时刻启动ra-ContentionResolutionTimer。
在ra-ContentionResolutionTimer运行期间，监听C-RNTI或TC-RNTI加扰的PDCCH，以接收Msg4。例如，在接收到承载Msg4的PDSCH的情况下，通过匹配PDSCH中的CCCH SDU中的竞争解决标识和Msg3中携带的终端标识确定竞争是否解决，例如，在二者匹配的情况下，认为竞争解决成功，否则，认为竞争解决失败，如果终端设备发送Msg1的次数小于网络设备配置的最大传输次数门限，则所述终端设备重新发起随机接入。
综上所述，在本申请实施例中，在随机接入竞争解决定时器超时，并且在所述随机接入竞争解决定时器超时之前未收到调度消息Msg3重传的PDCCH的情况下，终端设备认为竞争解决不成功；和/或，在随机接入竞争解决定时器超时，并且在所述随机接入竞争解决定时器超时之前收到调度消息Msg3重传的PDCCH的情况下，终端设备不认为竞争解决失败，进一步根据重传Msg3后的Msg4的接收情况，判断是否竞争解决成功，有利于避免终端设备在随机接入竞争解决定时器超时时即认为竞争解决失败导致频繁发起随机接入的问题，降低了随机接入时延，提升了随机接入成功率。
上文结合图6至图7，详细描述了本申请的方法实施例，下文结合图8至图10，详细描述本申请的装置实施例，应理解，装置实施例与方法实施例相互对应，类似的描述可以参照方法实施例。
图8示出了根据本申请实施例的终端设备400的示意性框图。如图8所示，该终端设备400包括：
处理单元410，用于在随机接入竞争解决定时器超时，并且在所述随机接入竞争解决定时器超时之前未收到调度消息Msg3重传的物理下行控制信道PDCCH的情况下，认为竞争解决不成功。
在本申请一些实施例中，所述随机接入竞争解决定时器在发送所述Msg3之后的第一个时域符号启动或者重启。
在本申请一些实施例中，所述随机接入竞争解决定时器在发送所述Msg3的第一时间偏移之后的第一个时域符号启动或者重启。
在本申请一些实施例中，所述随机接入竞争解决定时器在第一物理上行共享信道PUSCH的最后一次重复传输所在的子帧启动或者重启，其中，所述第一PUSCH用于承载所述Msg3。
在本申请一些实施例中，所述随机接入竞争解决定时器在第二PUSCH的最后一次重复传输所在的子帧加上第一时间偏移之后启动或者重启，其中，所述第二PUSCH用于承载所述Msg3。
在本申请一些实施例中，所述处理单元410还用于：
在所述随机接入竞争解决定时器超时，并且在所述随机接入竞争解决定时器超时之前未收到调度Msg3重传的PDCCH的情况下，丢弃临时小区无线网络临时标识TC-RNTI，其中，所述TC-RNTI用于加扰所述PDCCH。
在本申请一些实施例中，所述处理单元410还用于：
在所述随机接入竞争解决定时器超时，并且在所述随机接入竞争解决定时器超时之前收到调度Msg3重传的PDCCH的情况下，不认为竞争解决失败。
在本申请一些实施例中，所述终端设备400还包括：
通信单元，用于在所述随机接入竞争解决定时器超时之前收到调度Msg3重传的PDCCH的情况下，重传所述Msg3；
所述处理单元410还用于：在重传所述Msg3的第一时间偏移之后，重启随机接入竞争解决定时器；
所述通信单元还用于：在所述随机接入竞争解决定时器运行期间，监听网络设备发送的小区无线网络临时标识C-RNTI或TC-RNTI加扰的PDCCH。
在本申请一些实施例中，所述第一时间偏移根据所述终端设备和网络设备之间的往返时延RTT确定。
在本申请一些实施例中，所述终端设备为非地面网络NTN系统中的终端设备，或者，所述终端设备为TN系统中的终端设备。
综上所述，在本申请实施例中，在随机接入竞争解决定时器超时，并且在所述随机接入竞争解决定时器超时之前未收到调度消息Msg3重传的PDCCH的情况下，终端设备认为竞争解决不成功；和/或，在随机接入竞争解决定时器超时，并且在所述随机接入竞争解决定时器超时之前收到调度消息Msg3重传的PDCCH的情况下，终端设备不认为竞争解决失败，进一步根据重传Msg3后的Msg4的接收情况，判断是否竞争解决成功，有利于避免终端设备在随机接入竞争解决定时器超时时即认为竞争解决失败导致频繁发起随机接入的问题，降低了随机接入时延，提升了随机接入成功率。
可选地，在本申请一些实施例中，上述通信单元可以是通信接口或收发器，或者是通信芯片或者片上系统的输入输出接口。上述处理单元可以是一个或多个处理器。
应理解，根据本申请实施例的终端设备400可对应于本申请方法实施例中的终端设备，并且终端设备400中的各个单元的上述和其它操作和/或功能分别为了实现图4至图7所示方法200中终端设备的相应流程，为了简洁，在此不再赘述。
图9是本申请实施例提供的一种通信设备600示意性结构图。图9所示的通信设备600包括处理器610，处理器610可以从存储器中调用并运行计算机程序，以实现本申请实施例中的方法。
可选地，如图9所示，通信设备600还可以包括存储器620。其中，处理器610可以从存储器620中调用并运行计算机程序，以实现本申请实施例中的方法。
其中，存储器620可以是独立于处理器610的一个单独的器件，也可以集成在处理器610中。
可选地，如图9所示，通信设备600还可以包括收发器630，处理器610可以控制该收发器630与其他设备进行通信，具体地，可以向其他设备发送信息或数据，或接收其他设备发送的信息或数据。
其中，收发器630可以包括发射机和接收机。收发器630还可以进一步包括天线，天线的数量可以为一个或多个。
可选地，该通信设备600具体可为本申请实施例的网络设备，并且该通信设备600可以实现本申请实施例的各个方法中由网络设备实现的相应流程，为了简洁，在此不再赘述。
可选地，该通信设备600具体可为本申请实施例的移动终端/终端设备，并且该通信设备600可以实现本申请实施例的各个方法中由移动终端/终端设备实现的相应流程，为了简洁，在此不再赘述。
图10是本申请实施例的芯片的示意性结构图。图10所示的芯片700包括处理器710，处理器710可以从存储器中调用并运行计算机程序，以实现本申请实施例中的方法。
可选地，如图10所示，芯片700还可以包括存储器720。其中，处理器710可以从存储器720中调用并运行计算机程序，以实现本申请实施例中的方法。
其中，存储器720可以是独立于处理器710的一个单独的器件，也可以集成在处理器710中。
可选地，该芯片700还可以包括输入接口730。其中，处理器710可以控制该输入接口730与其他设备或芯片进行通信，具体地，可以获取其他设备或芯片发送的信息或数据。
可选地，该芯片700还可以包括输出接口740。其中，处理器710可以控制该输出接口740与其他设备或芯片进行通信，具体地，可以向其他设备或芯片输出信息或数据。
可选地，该芯片可应用于本申请实施例中的网络设备，并且该芯片可以实现本申请实施例的各个方法中由网络设备实现的相应流程，为了简洁，在此不再赘述。
可选地，该芯片可应用于本申请实施例中的移动终端/终端设备，并且该芯片可以实现本申请实施例的各个方法中由移动终端/终端设备实现的相应流程，为了简洁，在此不再赘述。
应理解，本申请实施例提到的芯片还可以称为系统级芯片，系统芯片，芯片系统或片上系统芯片等。
图11是本申请实施例提供的一种通信系统900的示意性框图。如图11所示，该通信系统900包括终端设备910和网络设备920。
其中，该终端设备910可以用于实现上述方法中由终端设备实现的相应的功能，以及该网络设备920可以用于实现上述方法中由网络设备实现的相应的功能为了简洁，在此不再赘述。
应理解，本申请实施例的处理器可能是一种集成电路芯片，具有信号的处理能力。在实现过程中，上述方法实施例的各步骤可以通过处理器中的硬件的集成逻辑电路或者软件形式的指令完成。上述的处理器可以是通用处理器、数字信号处理器(Digital Signal Processor，DSP)、专用集成电路(Application Specific Integrated Circuit，ASIC)、现成可编程门阵列(Field Programmable Gate Array，FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件。可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。结合本申请实施例所公开的方法的步骤可以直接体现为硬件译码处理器执行完成，或者用译码处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器， 可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器，处理器读取存储器中的信息，结合其硬件完成上述方法的步骤。
可以理解，本申请实施例中的存储器可以是易失性存储器或非易失性存储器，或可包括易失性和非易失性存储器两者。其中，非易失性存储器可以是只读存储器(Read-Only Memory，ROM)、可编程只读存储器(Programmable ROM，PROM)、可擦除可编程只读存储器(Erasable PROM，EPROM)、电可擦除可编程只读存储器(Electrically EPROM，EEPROM)或闪存。易失性存储器可以是随机存取存储器(Random Access Memory，RAM)，其用作外部高速缓存。通过示例性但不是限制性说明，许多形式的RAM可用，例如静态随机存取存储器(Static RAM，SRAM)、动态随机存取存储器(Dynamic RAM，DRAM)、同步动态随机存取存储器(Synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(Double Data Rate SDRAM，DDR SDRAM)、增强型同步动态随机存取存储器(Enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(Synchlink DRAM，SLDRAM)和直接内存总线随机存取存储器(Direct Rambus RAM，DR RAM)。应注意，本文描述的系统和方法的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
应理解，上述存储器为示例性但不是限制性说明，例如，本申请实施例中的存储器还可以是静态随机存取存储器(static RAM，SRAM)、动态随机存取存储器(dynamic RAM，DRAM)、同步动态随机存取存储器(synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(double data rate SDRAM，DDR SDRAM)、增强型同步动态随机存取存储器(enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(synch link DRAM，SLDRAM)以及直接内存总线随机存取存储器(Direct Rambus RAM，DR RAM)等等。也就是说，本申请实施例中的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
本申请实施例还提供了一种计算机可读存储介质，用于存储计算机程序。
可选的，该计算机可读存储介质可应用于本申请实施例中的网络设备，并且该计算机程序使得计算机执行本申请实施例的各个方法中由网络设备实现的相应流程，为了简洁，在此不再赘述。
可选地，该计算机可读存储介质可应用于本申请实施例中的移动终端/终端设备，并且该计算机程序使得计算机执行本申请实施例的各个方法中由移动终端/终端设备实现的相应流程，为了简洁，在此不再赘述。
本申请实施例还提供了一种计算机程序产品，包括计算机程序指令。
可选的，该计算机程序产品可应用于本申请实施例中的网络设备，并且该计算机程序指令使得计算机执行本申请实施例的各个方法中由网络设备实现的相应流程，为了简洁，在此不再赘述。
可选地，该计算机程序产品可应用于本申请实施例中的移动终端/终端设备，并且该计算机程序指令使得计算机执行本申请实施例的各个方法中由移动终端/终端设备实现的相应流程，为了简洁，在此不再赘述。
本申请实施例还提供了一种计算机程序。
可选的，该计算机程序可应用于本申请实施例中的网络设备，当该计算机程序在计算机上运行时，使得计算机执行本申请实施例的各个方法中由网络设备实现的相应流程，为了简洁，在此不再赘述。
可选地，该计算机程序可应用于本申请实施例中的移动终端/终端设备，当该计算机程序在计算机上运行时，使得计算机执行本申请实施例的各个方法中由移动终端/终端设备实现的相应流程，为了简洁，在此不再赘述。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(Read-Only Memory，ROM)、随机存取存储器(Random Access Memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应所述以权利要求的保护范围为准。

Claims (25)

  1. 一种无线通信的方法，其特征在于，包括：
    在随机接入竞争解决定时器超时，并且在所述随机接入竞争解决定时器超时之前未收到调度消息Msg3重传的物理下行控制信道PDCCH的情况下，终端设备认为竞争解决不成功。
  2. 根据权利要求1所述的方法，其特征在于，所述随机接入竞争解决定时器在发送所述Msg3之后的第一个时域符号启动或者重启。
  3. 根据权利要求1所述的方法，其特征在于，所述随机接入竞争解决定时器在发送所述Msg3的第一时间偏移之后的第一个时域符号启动或者重启。
  4. 根据权利要求1所述的方法，其特征在于，所述随机接入竞争解决定时器在第一物理上行共享信道PUSCH的最后一次重复传输所在的子帧启动或者重启，其中，所述第一PUSCH用于承载所述Msg3。
  5. 根据权利要求1所述的方法，其特征在于，所述随机接入竞争解决定时器在第二PUSCH的最后一次重复传输所在的子帧加上第一时间偏移之后启动或者重启，其中，所述第二PUSCH用于承载所述Msg3。
  6. 根据权利要求1-5中任一项所述的方法，其特征在于，所述方法还包括：
    在所述随机接入竞争解决定时器超时，并且在所述随机接入竞争解决定时器超时之前未收到调度Msg3重传的PDCCH的情况下，丢弃临时小区无线网络临时标识TC-RNTI，其中，所述TC-RNTI用于加扰所述PDCCH。
  7. 根据权利要求1-6中任一项所述的方法，其特征在于，所述方法还包括：
    在所述随机接入竞争解决定时器超时，并且在所述随机接入竞争解决定时器超时之前收到调度Msg3重传的PDCCH的情况下，所述终端设备不认为竞争解决失败。
  8. 根据权利要求1-7中任一项所述的方法，其特征在于，所述方法还包括：
    在所述随机接入竞争解决定时器超时之前收到调度Msg3重传的PDCCH的情况下，所述终端设备重传所述Msg3，并在重传所述Msg3的第一时间偏移之后重启随机接入竞争解决定时器，在所述随机接入竞争解决定时器运行期间，所述终端设备监听网络设备发送的小区无线网络临时标识C-RNTI或TC-RNTI加扰的PDCCH。
  9. 根据权利要求3、5或8所述的方法，其特征在于，所述第一时间偏移根据所述终端设备和网络设备之间的往返时延RTT确定。
  10. 根据权利要求1-9中任一项所述的方法，其特征在于，所述方法应用于非地面网络NTN系统，或者，所述方法应用于NTN系统和地面网络TN系统。
  11. 一种终端设备，其特征在于，包括：
    处理单元，用于在随机接入竞争解决定时器超时，并且在所述随机接入竞争解决定时器超时之前未收到调度消息Msg3重传的物理下行控制信道PDCCH的情况下，认为竞争解决不成功。
  12. 根据权利要求11所述的终端设备，其特征在于，所述随机接入竞争解决定时器在发送所述Msg3之后的第一个时域符号启动或者重启。
  13. 根据权利要求11所述的终端设备，其特征在于，所述随机接入竞争解决定时器在发送所述Msg3的第一时间偏移之后的第一个时域符号启动或者重启。
  14. 根据权利要求11所述的终端设备，其特征在于，所述随机接入竞争解决定时器在第一物理上行共享信道PUSCH的最后一次重复传输所在的子帧启动或者重启，其中，所述第一PUSCH用于承载所述Msg3。
  15. 根据权利要求11所述的终端设备，其特征在于，所述随机接入竞争解决定时器在第二PUSCH的最后一次重复传输所在的子帧加上第一时间偏移之后启动或者重启，其中，所述第二PUSCH用于承载所述Msg3。
  16. 根据权利要求11-15中任一项所述的终端设备，其特征在于，所述处理单元还用于：
    在所述随机接入竞争解决定时器超时，并且在所述随机接入竞争解决定时器超时之前未收到调度Msg3重传的PDCCH的情况下，丢弃临时小区无线网络临时标识TC-RNTI，其中，所述TC-RNTI用于加扰所述PDCCH。
  17. 根据权利要求11-16中任一项所述的终端设备，其特征在于，所述处理单元还用于：
    在所述随机接入竞争解决定时器超时，并且在所述随机接入竞争解决定时器超时之前收到调度Msg3重传的PDCCH的情况下，不认为竞争解决失败。
  18. 根据权利要求11-17中任一项所述的终端设备，其特征在于，所述终端设备还包括：
    通信单元，用于在所述随机接入竞争解决定时器超时之前收到调度Msg3重传的PDCCH的情况 下，重传所述Msg3；
    所述处理单元还用于：在重传所述Msg3的第一时间偏移之后，重启随机接入竞争解决定时器；
    所述通信单元还用于：在所述随机接入竞争解决定时器运行期间，监听网络设备发送的小区无线网络临时标识C-RNTI或TC-RNTI加扰的PDCCH。
  19. 根据权利要求13、15或18所述的终端设备，其特征在于，所述第一时间偏移根据所述终端设备和网络设备之间的往返时延RTT确定。
  20. 根据权利要求11-19中任一项所述的终端设备，其特征在于，所述终端设备为非地面网络NTN系统中的终端设备，或者，所述终端设备为地面TN系统中的终端设备。
  21. 一种终端设备，其特征在于，包括：处理器和存储器，该存储器用于存储计算机程序，所述处理器用于调用并运行所述存储器中存储的计算机程序，执行如权利要求1至10中任一项所述的方法。
  22. 一种芯片，其特征在于，包括：处理器，用于从存储器中调用并运行计算机程序，使得安装有所述芯片的设备执行如权利要求1至10中任一项所述的方法。
  23. 一种计算机可读存储介质，其特征在于，用于存储计算机程序，所述计算机程序使得计算机执行如权利要求1至10中任一项所述的方法。
  24. 一种计算机程序产品，其特征在于，包括计算机程序指令，该计算机程序指令使得计算机执行如权利要求1至10中任一项所述的方法。
  25. 一种计算机程序，其特征在于，所述计算机程序使得计算机执行如权利要求1至10中任一项所述的方法。
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