WO2023130467A1 - Procédé de communication sans fil, dispositif terminal et dispositif de réseau - Google Patents

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

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Publication number
WO2023130467A1
WO2023130467A1 PCT/CN2022/071102 CN2022071102W WO2023130467A1 WO 2023130467 A1 WO2023130467 A1 WO 2023130467A1 CN 2022071102 W CN2022071102 W CN 2022071102W WO 2023130467 A1 WO2023130467 A1 WO 2023130467A1
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WIPO (PCT)
Prior art keywords
channel
resource
channel access
physical channel
indication information
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PCT/CN2022/071102
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English (en)
Chinese (zh)
Inventor
吴作敏
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Oppo广东移动通信有限公司
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Priority to PCT/CN2022/071102 priority Critical patent/WO2023130467A1/fr
Publication of WO2023130467A1 publication Critical patent/WO2023130467A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access, e.g. scheduled or random access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access, e.g. scheduled or random access
    • H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]

Definitions

  • the present application relates to the field of communication technologies, and more specifically, to a wireless communication method, terminal equipment, and network equipment.
  • LBT listen before talk
  • PRACH physical random access channel
  • MsgA message A
  • the present application provides a wireless communication method, a terminal device and a network device.
  • a wireless communication method including: a terminal device receives first indication information, and the first indication information is used to determine whether to perform a channel access process before transmission on a first physical channel, or the The first indication information is used to determine the channel access type of the first physical channel; the terminal device transmits the first physical channel according to the first resource and the first indication information, where the first resource uses for transmitting the first physical channel.
  • a wireless communication method including: a network device sending first indication information to a terminal device, where the first indication information is used to determine whether to perform a channel access procedure before transmission on a first physical channel, or The first indication information is used to determine the channel access type of the first physical channel; the network device receives the first physical channel according to the first resource and the first indication information, wherein the first Resources are used to transmit the first physical channel.
  • a terminal device including: a receiving module, configured to receive first indication information, and the first indication information is used to determine whether to perform a channel access process before transmission of the first physical channel, or the The first indication information is used to determine the channel access type of the first physical channel; the transmission module is configured to transmit the first physical channel according to the first resource and the first indication information, wherein the first resource used to transmit the first physical channel.
  • a network device including: a sending module, configured to send first indication information to a terminal device, where the first indication information is used to determine whether to perform a channel access process before transmission on a first physical channel, Or the first indication information is used to determine the channel access type of the first physical channel; the receiving module is configured to receive the first physical channel according to the first resource and the first indication information, wherein the The first resource is used to transmit the first physical channel.
  • a terminal device including a memory and a processor, the memory is used to store a program, and the processor is used to invoke the program in the memory to execute the method according to the first aspect.
  • a network device including a memory and a processor, the memory is used to store a program, and the processor is used to invoke the program in the memory to execute the method described in the second aspect.
  • an apparatus including a processor, configured to call a program from a memory to execute the method described in the first aspect.
  • an apparatus including a processor, configured to call a program from a memory to execute the method described in the second aspect.
  • a ninth aspect provides a chip, including a processor, configured to call a program from a memory, so that a device installed with the chip executes the method described in the first aspect.
  • a chip including a processor, configured to call a program from a memory, so that a device installed with the chip executes the method described in the second aspect.
  • a computer-readable storage medium on which a program is stored, and the program causes a computer to execute the method described in the first aspect.
  • a computer-readable storage medium on which a program is stored, and the program causes a computer to execute the method described in the second aspect.
  • a thirteenth aspect provides a computer program product, including a program, the program causes a computer to execute the method described in the first aspect.
  • a fourteenth aspect provides a computer program product, including a program, the program causes a computer to execute the method described in the second aspect.
  • a fifteenth aspect provides a computer program, the computer program causes a computer to execute the method described in the first aspect.
  • a sixteenth aspect provides a computer program, the computer program causes a computer to execute the method described in the second aspect.
  • the terminal device determines the first physical channel for transmission according to the first indication information (that is, the physical channel in the random access process, for example, it can be PRACH or MsgA corresponding Whether to perform a channel access process and/or determine the type of channel access performed before transmitting the first physical channel), by allowing the terminal device to transmit the first physical channel without performing channel access under certain conditions, The transmission probability of the first physical channel in the random access process can be increased while ensuring fair and reasonable use of the shared frequency spectrum.
  • the first indication information that is, the physical channel in the random access process, for example, it can be PRACH or MsgA corresponding Whether to perform a channel access process and/or determine the type of channel access performed before transmitting the first physical channel
  • FIG. 1 is a system architecture diagram of a communication system to which an embodiment of the present application can be applied.
  • Fig. 2 is a flowchart of a four-step random access process.
  • Fig. 3 is a flowchart of a two-step random access process.
  • FIG. 4 is a schematic flowchart of a wireless communication method provided by an embodiment of the present application.
  • FIG. 5 is a schematic structural diagram of a terminal device provided by an embodiment of the present application.
  • FIG. 6 is a schematic structural diagram of a network device provided by an embodiment of the present application.
  • Fig. 7 is a schematic structural diagram of the device provided by the embodiment of the present application.
  • GSM global system of mobile communication
  • CDMA code division multiple access
  • WCDMA broadband code division multiple access
  • general packet radio service general packet radio service
  • GPRS general packet radio service
  • LTE long term evolution
  • LTE-A advanced long term evolution
  • new radio new radio
  • NR evolution system of NR system
  • LTE LTE-based access to unlicensed spectrum
  • LTE-U unlicensed spectrum
  • NR NR-based access to unlicensed spectrum
  • NR-U unlicensed spectrum unlicensed spectrum
  • UMTS universal mobile telecommunications system
  • UMTS wireless local area network
  • WLAN wireless local area networks
  • WiFi wireless fidelity
  • 5G fifth-generation communication
  • the mobile communication system will not only support traditional communication, but also support, for example, device to device (device to device, D2D) communication, machine to machine (machine to machine, M2M) communication, machine type Communication (machine type communication, MTC), inter-vehicle (vehicle to vehicle, V2V) communication, or vehicle networking (vehicle to everything, V2X) communication, etc.
  • D2D device to device
  • M2M machine to machine
  • MTC machine type Communication
  • V2V vehicle to vehicle to vehicle
  • V2X vehicle networking
  • 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 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 a dedicated spectrum.
  • the embodiments of the present application may be applied to an NTN system, and may also be applied to a terrestrial communication network (terrestrial networks, TN) system.
  • the NTN system includes an NR-based NTN system and an IoT-based NTN system.
  • Embodiments of the present application describe various embodiments in conjunction with network equipment and terminal equipment, wherein the terminal equipment may also be called user equipment (user equipment, UE), access terminal, user unit, user station, mobile station, mobile station (mobile station, MS), mobile terminal (mobile Terminal, MT), remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device, etc.
  • user equipment user equipment
  • MS mobile station
  • MS mobile terminal
  • MT mobile Terminal
  • remote station remote terminal, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device, etc.
  • the terminal device may be a station (STATION, ST) in the WLAN, and may be a cellular phone, a cordless phone, a session initiation protocol (session initiation protocol, SIP) phone, a wireless local loop (wireless local loop, WLL) stations, personal digital assistant (PDA) devices, handheld devices with wireless communication capabilities, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices, next-generation communication systems such as NR networks
  • PLMN public land mobile network
  • a terminal device may be a device that provides voice and/or data connectivity to users, and may be used to connect people, things and machines, such as handheld devices with wireless connection functions, vehicle-mounted devices, and the like.
  • the terminal device in the embodiment of the present application can be mobile phone (mobile phone), tablet computer (Pad), notebook computer, palmtop computer, mobile internet device (mobile internet device, MID), wearable device, virtual reality (virtual reality, VR) equipment, augmented reality (augmented reality, AR) equipment, wireless terminals in industrial control, wireless terminals in self driving, wireless terminals in remote medical surgery, smart Wireless terminals in smart grid, wireless terminals in transportation safety, wireless terminals in smart city, wireless terminals in smart home, etc.
  • a terminal device can be used to act as a base station.
  • a terminal device may act as a scheduling entity, which provides sidelink signals between terminal devices in V2X or D2D, etc.
  • a cell phone and an automobile communicate with each other using sidelink signals.
  • Cellular phones and smart home devices communicate without relaying communication signals through base stations.
  • 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, 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 in this embodiment of the present application may be a device for communicating with a terminal device, and the network device may also be called an access network device or a wireless access network device, for example, the network device may be a base station.
  • the network device in this embodiment of the present application may refer to a radio access network (radio access network, RAN) node (or device) that connects a terminal device to a wireless network.
  • radio access network radio access network, RAN node (or device) that connects a terminal device to a wireless network.
  • the base station can broadly cover various names in the following, or replace with the following names, such as: Node B (NodeB), evolved base station (evolved NodeB, eNB), next generation base station (next generation NodeB, gNB), relay station, Access point, transmission point (transmitting and receiving point, TRP), transmission point (transmitting point, TP), primary station MeNB, secondary station SeNB, multi-standard radio (MSR) node, home base station, network controller, access node , wireless node, access point (access piont, AP), transmission node, transceiver node, base band unit (base band unit, BBU), remote radio unit (remote radio unit, RRU), active antenna unit (active antenna unit) , AAU), radio head (remote radio head, RRH), central unit (central unit, CU), distributed unit (distributed unit, DU), positioning nodes, etc.
  • NodeB Node B
  • evolved base station evolved NodeB, eNB
  • a base station may be a macro base station, a micro base station, a relay node, a donor node, or the like, or a combination thereof.
  • a base station may also refer to a communication module, modem or chip used to be set in the aforementioned equipment or device.
  • the base station can also be a mobile switching center, a device that undertakes the function of a base station in D2D, vehicle-to-everything (V2X), machine-to-machine (M2M) communication, and a device in a 6G network.
  • V2X vehicle-to-everything
  • M2M machine-to-machine
  • Base stations can support networks of the same or different access technologies. The embodiment of the present application does not limit the specific technology and specific device form adopted by the network device.
  • Base stations can be fixed or mobile.
  • a helicopter or drone can be configured to act as a mobile base station, and one or more cells can move according to the location of the mobile base station.
  • a helicopter or drone may be configured to serve as a device in communication with another base station.
  • the network device in this embodiment of the present application may refer to a CU or a DU, or, the network device includes a CU and a DU.
  • a gNB may also include an AAU.
  • Network equipment and terminal equipment can be deployed on land, including indoors or outdoors, hand-held or vehicle-mounted; they can also be deployed on water; they can also be deployed on aircraft, balloons and satellites in the air.
  • the scenarios where the network device and the terminal device are located are not limited.
  • 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, where the small cell may include: a metro cell, a 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 ( 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, where the small cell may include: a metro cell, a micro cell, a pico cell ( pico cell), femto
  • 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.
  • the “configuration” in this embodiment of the present application may include configuring by at least one of system messages, radio resource control (radio resource control, RRC) signaling, and media access control element (MAC CE) .
  • RRC radio resource control
  • MAC CE media access control element
  • predefined or “preset” may be pre-saved in devices (for example, including terminal devices and network devices) with corresponding codes, tables or other methods that can be used to indicate related information implementation, and the present application does not limit the specific implementation manner.
  • 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.
  • some communication systems may include new frequency bands. For example, 52.6GHz–71GHz or 71GHz–114.25GHz.
  • the new frequency band may include licensed spectrum or unlicensed spectrum. In other words, the new frequency band includes dedicated spectrum and shared spectrum.
  • the unlicensed spectrum is the spectrum allocated by the country and region that can be used for radio equipment communication.
  • This spectrum is usually considered as a shared spectrum, that is, communication equipment in different communication systems can use this spectrum as long as they meet the regulatory requirements set by the country or region on this spectrum, and there is no need to apply for a dedicated spectrum authorization from the government.
  • the communication device follows the "LBT" principle, or in other words, the communication device needs to perform a channel access process. That is, before a communication device transmits a signal on an unlicensed spectrum channel, it needs to perform channel sensing (sensing), and only when the channel sensing is successful, the communication device can perform signal transmission. If the communication device fails to monitor the channel on the channel of the unlicensed frequency spectrum, the communication device cannot perform signal transmission.
  • Channel monitoring success may also be referred to as LBT success or channel monitoring idle.
  • LBT success For example, the energy detection performed on the channel in the listening time slot is lower than the energy detection threshold.
  • Channel listening failure may also be referred to as LBT failure or channel listening busy.
  • the energy detection performed on the channel in the listening time slot is higher than or equal to the energy detection threshold.
  • the subcarrier spacing considered in the new frequency band may be larger than the subcarrier spacing supported by the existing NR system.
  • the currently supported subcarrier spacing includes at least one of the following: 120kHz, 480kHz, and 960kHz.
  • the four-step random access procedure is also called Type-1 random access procedure (Type-1 random access procedure).
  • Type-1 random access procedure As shown in Figure 2, the four-step random access process includes the following steps.
  • Step 1 The terminal device sends a random access preamble (or called message 1 (Msg1)) to the network device.
  • Msg1 message 1
  • Step 2 The terminal device detects the random access response (random access response, RAR, or message 2 (Msg2)) sent by the network device.
  • RAR random access response
  • Msg2 message 2
  • the terminal device If the terminal device detects the RAR corresponding to Msg1 within the RAR window, the terminal device transmits message 3 (Msg3) according to the RAR.
  • Msg3 message 3
  • the RAR is associated with a random access preamble identifier (RAPID).
  • RAPID random access preamble identifier
  • RAPID timing advance command (timing advance command, TAC), temporary cell radio network temporary identifier (temporary cell radio network temporary identifier, TC-RNTI), uplink authorization (UL grant, also known as RAR UL grant).
  • TAC timing advance command
  • TAC timing advance command
  • TC-RNTI temporary cell radio network temporary identifier
  • UL grant also known as RAR UL grant
  • the RAR UL grant may include one or more of the following information: frequency domain frequency hopping flag (frequency hopping flag), physical uplink shared channel (physical uplink shared channel, PUSCH) frequency domain resource allocation (PUSCH frequency resource allocation ), PUSCH time resource allocation (PUSCH time resource allocation), modulation and coding scheme (modulation and coding scheme, MCS), PUSCH transmission power control (transmit power control, TPC) command (TPC command for PUSCH), channel state information ( channel state information (CSI) request (CSI request).
  • frequency domain frequency hopping flag frequency hopping flag
  • physical uplink shared channel physical uplink shared channel
  • PUSCH frequency domain resource allocation
  • PUSCH time resource allocation PUSCH time resource allocation
  • modulation and coding scheme modulation and coding scheme, MCS
  • PUSCH transmission power control transmit power control, TPC
  • TPC command for PUSCH channel state information
  • CSI channel state information
  • CSI request channel state information
  • the RAR UL grant also includes the following information: channel access scheme indication (ChannelAccess-CPext).
  • the terminal device If the terminal device does not detect the RAR corresponding to Msg1 within the RAR window, the terminal device re-initiates the random access process (for example, the terminal device retransmits Msg1).
  • Step 3 The terminal device sends a PUSCH, or Msg3PUSCH, to the network device according to the received RAR.
  • the version number of the redundancy version (redundancy version, RV) used by the Msg3PUSCH transmitted according to the uplink authorization in the RAR is 0.
  • the third step allows hybrid automatic repeat reQuest (HARQ) retransmission. That is, after sending the PUSCH to the network device according to the RAR, the terminal device may receive TC-RNTI scrambled downlink control information (DCI) format 0_0 to schedule retransmission of the PUSCH.
  • DCI downlink control information
  • the DCI format 0_0 of the TC-RNTI scrambling code may include one or more of the following information: uplink and downlink DCI indication (1 bit), frequency domain resource allocation (the size is determined according to the UL bandwidth part (bandwidth part, BWP) bandwidth) , time domain resource allocation (4 bits), frequency domain frequency hopping indication (1 bit), MCS (5 bits), new data indication (1 bit reserved), RV version (2 bits), HARQ process number (4 bits reserved reserved), PUSCH power control command word (2 bits), UL/supplementary uplink (supplementary uplink, SUL) carrier indication (1 bit).
  • DCI format 0_0 may also include the following information: channel access scheme indication (2 bits).
  • Step 4 The terminal device receives a physical downlink control channel (physical downlink control channel, PDSCH) including a contention resolution message sent by the network device, and the PDSCH may also be called message 4 (Msg4).
  • PDSCH physical downlink control channel
  • Msg4 message 4
  • the terminal device can receive the PDSCH including the contention resolution message sent by the network device according to the TC-RNTI or C-RNTI scrambled DCI format 1_0.
  • the fourth step allows HARQ retransmission, that is, after receiving the TC-RNTI or C-RNTI scrambled DCI format 1_0, if the terminal device fails to receive the corresponding PDSCH, the terminal device can physically uplink the DCI format 1_0 Negative acknowledgment (negative acknowledgment, NACK) information is fed back on control channel (physical uplink control channel, PUCCH) resources.
  • NACK negative acknowledgment
  • the DCI format 1_0 of TC-RNTI or C-RNTI scrambling code can include one or more of the following information: uplink and downlink DCI indication (1 bit), frequency domain resource allocation (the size is determined according to DL BWP bandwidth), time domain Resource allocation (4 bits), virtual resource block (virtual resource block, VRB) to physical resource block (physical resource block, PRB) mapping (1 bit), MCS (5 bits), new data indication (1 bit), RV version (2 bits), HARQ process number (4 bits), downlink assignment indicator (DAI) (2 bits reserved), PUCCH power control command word (2 bits), PUCCH resource indication (3 bits), PDSCH- to-HARQ feedback time indication (3 bits).
  • DCI format 1_0 also includes the following information: channel access scheme indication (2 bits).
  • the terminal device After receiving the TC-RNTI or C-RNTI scrambled DCI format 1_0, if the terminal device successfully receives the corresponding PDSCH, the random access process is completed.
  • the two-step random access procedure is also called Type-2 random access procedure (Type-2 random access procedure).
  • Type-2 random access procedure As shown in Figure 3, the two-step random access process includes the following steps.
  • Step 1 the terminal device sends a random access preamble and PUSCH (or called message A (MsgA)) to the network device.
  • MsgA message A
  • the second step (step B in FIG. 3 ): the terminal device detects the random access response (or called MsgB) sent by the network device.
  • MsgB includes two types of RAR, one is successful RAR (successRAR), and the other is fallback RAR (fallbackRAR).
  • Case 1 If the terminal device detects the successRAR corresponding to MsgA in the RAR window, since the successRAR includes a contention resolution message, the terminal device can send an acknowledgment (acknowledgment, ACK) message to the network device, and the random access process is completed (as shown in Figure 3 left as shown in the figure).
  • acknowledgement acknowledgement
  • SuccessRAR may include one or more of the following information: UE contention resolution ID (UE contention resolution identity), TPC, HARQ feedback timing indicator (HARQ feedback timing indicator), PUCCH resource indicator (PUCCH resource indicator), timing advance command (timing advance command, TAC), cell radio network temporary identifier (C-RNTI).
  • UE contention resolution ID UE contention resolution identity
  • TPC HARQ feedback timing indicator
  • PUCCH resource indicator PUCCH resource indicator
  • timing advance command timing advance command
  • TAC cell radio network temporary identifier
  • channel access plan indication For the shared frequency spectrum, the following information is also included in the successRAR: channel access plan indication.
  • Case 2 If the terminal device detects the fallbackRAR corresponding to MsgA in the RAR window, the terminal device can transmit Msg3 according to the fallbackRAR. In other words, the terminal device falls back to the four-step random access process (wherein, the third step and the fourth step are the same as the third step and the fourth step in the four-step random access process, as shown in the right figure of Figure 3 );
  • fallbackRAR includes one or more of the following information: TAC, TC-RNTI, UL grant (also known as RAR UL grant).
  • the RAR UL grant may include one or more of the following information: frequency domain frequency hopping flag, PUSCH frequency domain resource allocation, PUSCH time domain resource allocation, MCS, PUSCH TPC command, CSI request.
  • the RAR UL grant also includes the following information: channel access scheme indication.
  • the terminal device If the terminal device does not detect successRAR or fallbackRAR within the RAR window, the terminal device re-initiates a two-step or four-step random access process (for example, the terminal device retransmits MsgA or Msg1).
  • random access resources may include PRACH and/or MsgA resources.
  • the PRACH or MsgA resource configuration may include cell-common PRACH or MsgA resource configuration and/or dedicated PRACH or MsgA resource configuration.
  • PRACH and/or MsgA resource configuration can be used for different purposes such as initial access, cell handover (handover), and beam failure recovery (beam failure recovery, BFR).
  • the cell specific random-access parameters can be configured through system messages or dedicated RRC signaling.
  • the cell public random access parameters are configured on the BWP.
  • the common random access parameters of the cell may include PRACH resource configuration.
  • PRACH resource configuration can be configured through RACH-ConfigCommon.
  • the common random access parameters of the cell may include MsgA resource configuration.
  • the MsgA resource can be configured through MsgA-ConfigCommon, for example.
  • MsgA resources may include PRACH resources and/or msgA-PUSCH resources.
  • the PRACH resource can be configured through rach-ConfigCommonTwoStepRA
  • the msgA-PUSCH resource can be configured through msgA-PUSCH-Config.
  • Dedicated random access parameters may be configured through dedicated RRC signaling.
  • the dedicated RRC signaling may be RACH-ConfigDedicated.
  • the dedicated random access parameters may include PRACH resource configuration in the four-step random access process and/or MsgA resource configuration in the two-step random access process.
  • the random access resource configured in the dedicated random access parameter can be used for a contention free random access (CFRA).
  • CFRA contention free random access
  • the random access resources in the dedicated random access parameters can be used to obtain synchronous reconfiguration (such as cell switching, etc.).
  • Random access parameters for system message requests can be configured through RRC signaling (eg SI-RequestConfig).
  • the random access parameters used for system message request may include PRACH resource configuration, and the PRACH resource configuration is dedicated to requesting system message. If there is no PRACH resource configuration dedicated to requesting system information, the terminal device can request system information according to the PRACH resource configuration in the four-step random access process in the common random access parameters of the cell.
  • Random access parameters for BFR can be configured through dedicated RRC signaling (eg BeamFailureRecoveryConfig).
  • the random access parameters used for BFR may include PRACH resource configuration, and the PRACH resource configuration is dedicated to beam failure recovery when the terminal device detects beam failure.
  • the terminal device After receiving the random access resource configuration, the terminal device can select a corresponding random access resource according to the random access resource configuration to initiate a random access procedure based on different purposes.
  • the new frequency bands used in communication systems can include both dedicated spectrum (such as licensed spectrum) and shared spectrum (such as unlicensed spectrum).
  • dedicated spectrum such as licensed spectrum
  • shared spectrum such as unlicensed spectrum.
  • some countries or regions may have LBT (or channel access process) requirements, while other countries or regions have no LBT requirements.
  • the LBT method can include omnidirectional LBT, directional LBT, receiver-side assisted LBT, and no LBT.
  • the channel access method without LBT it may also need to be limited by certain conditions such as limiting a certain duty cycle (duty cycle), limiting a certain transmit power, and limiting the maximum channel occupancy time (maximum channel occupancy time, MCOT) ), application of automatic transmit power control (automatic transfer power control, ATPC), application of dynamic frequency selection (dynamic frequency selection, DFS), long-term interference detection or other interference elimination mechanisms, etc.
  • the terminal device can transmit the physical channel in the random access process without performing LBT. However, there is still no conclusion on how the terminal device determines whether the conditions for not performing LBT are met.
  • channel access procedure and “LBT” may be used interchangeably according to a specific context.
  • FIG. 4 is a schematic flowchart of a wireless communication method provided by an embodiment of the present application.
  • the method in FIG. 4 can be executed by a terminal device and a network device.
  • the terminal device may be, for example, the terminal device 120 mentioned above, and the network device may be, for example, the network device 110 mentioned above.
  • the terminal device receives first indication information.
  • the network device sends the first indication information to the terminal device.
  • the first indication information may be used to determine whether a channel access process is to be performed before transmission on the first physical channel; or, the first indication information may be used to determine a channel access type of the first physical channel.
  • step S420 the terminal device transmits the first physical channel according to the first resource (the first resource is used to transmit the first physical channel) and the first indication information.
  • the network device receives the first physical channel according to the first resource and the first indication information; or, the network device receives the first physical channel according to the first resource.
  • the terminal device determines whether to perform the channel access process before transmitting the first physical channel (such as the physical channel corresponding to PRACH or MsgA) according to the first indication information And/or determine the type of channel access performed before transmitting the first physical channel, and by allowing the terminal device to transmit the first physical channel without channel access under certain conditions, it can be ensured that the use of the shared spectrum is fair and reasonable , increasing the transmission probability of the first physical channel in the random access process.
  • the first physical channel such as the physical channel corresponding to PRACH or MsgA
  • the first physical channel may comprise PRACH.
  • the first physical channel may include a physical channel corresponding to MsgA.
  • the physical channel corresponding to the MsgA may include PRACH and/or PUSCH.
  • the first physical channel may include PRACH and a physical channel corresponding to MsgA.
  • the first indication information is used to determine whether to perform a channel access process before the first physical channel transmission, including: the first indication information is used to indicate whether to perform a channel access process before the first physical channel transmission Perform channel access process. For example, the first indication information is used to indicate that the channel access process is to be performed before the first physical channel transmission, or the first indication information is used to indicate that the channel access process is not to be performed before the first physical channel transmission.
  • the first indication information is used to determine whether to perform a channel access process before the first physical channel transmission, including: the first indication information is used to determine whether to support short control signaling transmission, the The terminal device determines whether to perform a channel access process before the first physical channel transmission according to whether it supports short control signaling transmission.
  • the terminal device determines whether to perform a channel access process before the transmission of the first physical channel according to whether it supports short control signaling transmission, which may include at least one of the following situations: when short When the control signaling is transmitted, the terminal device determines to perform a channel access process before the first physical channel transmission; when supporting short control signaling transmission, the terminal device determines that the first physical channel is transmitted before the No channel access process is performed; when short control signaling transmission is supported, the terminal device determines whether to perform a channel access process before the first physical channel transmission according to whether the first condition is satisfied.
  • whether the first condition is satisfied includes one or more of the following:
  • the first configuration information is used to obtain the first resource
  • the plurality of configuration information includes the first configuration information
  • the second resource is a resource occupied by a discovery signal burst transmission window (discovery burst transmission window, DBTW), or the second resource is a resource used to transmit a synchronizing signal block (synchronizing signal/PBCH block, SSB) (It should be understood that "used to transmit the SSB" means that the SSB may or may not be transmitted), or the second resource is a resource for transmitting the SSB.
  • DBTW discovery burst transmission window
  • SSB synchronizing signal block
  • the duty ratio condition may include that the total occupied duration in each cycle does not exceed a first duration.
  • the length of the cycle may be 100ms, and the length of the first duration may be 10ms.
  • the starting position of the period is determined according to a system frame number (system frame number, SFN).
  • system frame number system frame number, SFN
  • the start position of the period is SFN0.
  • the second resource is a resource occupied by the DBTW in each period.
  • the length of the DBTW configured by the network device is 1 ms and the period is 40 ms
  • the duration occupied by the second resource within every 100 ms in odd cycles is 3 ms
  • the duration occupied by the second resource in every 100 ms in even cycles is 2 ms.
  • the length of the DBTW configured by the network device is 1 ms
  • the period is 40 ms. It may also be considered that the duration occupied by the second resource within every 100 ms is 2.5 ms.
  • the second resource is a resource used for SSB transmission in each period.
  • the occupation duration of the second resource is the occupation duration of resources used for SSB transmission in each period. For example, if the network device configures the SSB transmission period as 20ms, and the resources used to transmit SSB in each SSB transmission period are 0.25ms, then the duration occupied by the second resource within every 100ms is 1.25ms.
  • the second resource is a resource for transmitting SSB in each period.
  • the occupation duration of the second resource is the occupation duration of resources for transmitting the SSB in each period.
  • the network device configures the SSB transmission period to be 20ms, and the resources used to transmit SSB in each SSB transmission period are 0.25ms, wherein, assuming that in a specific 100ms period in 5 SSB transmission periods, the resources for transmitting SSB
  • the occupied durations are 0.2ms, 0.25ms, 0.15ms, 0.2ms, and 0.2ms respectively, and the occupied duration of the second resource within every 100ms is 1ms.
  • the meeting the first condition includes: the total occupation time of resources used to transmit the first physical channel obtained according to the first configuration information within every 100 ms does not exceed 10 ms; and/or, the The first condition includes: the total occupancy time of resources used to transmit the first physical channel obtained according to the first configuration information within every 100 ms exceeds 10 ms, wherein the first configuration information is used to obtain the first resource .
  • the first resource is a PRACH resource acquired according to the RACH-ConfigCommon, that is, the first configuration information is the RACH-ConfigCommon.
  • satisfying the first condition is: the total occupation time of the PRACH resources acquired according to the RACH-ConfigCommon configuration information within every 100ms is not more than 10ms; and/or, not satisfying the first condition is: within every 100ms according to the - The total occupation time of the PRACH resources obtained from the ConfigCommon configuration information exceeds 10ms.
  • the meeting the first condition includes: within every 100 ms, the resources used to transmit the first physical channel obtained according to multiple configuration information occupy a total duration of no more than 10 ms; and/or, the not Satisfying the first condition includes: the total occupancy time of resources used to transmit the first physical channel obtained according to a plurality of configuration information within every 100 ms exceeds 10 ms, wherein the plurality of configuration information includes the first configuration information,
  • the first configuration information is used to acquire the first resource.
  • both RACH-ConfigCommon and RACH-ConfigDedicated are used to configure PRACH resources, wherein the first resource is the PRACH resource acquired according to RACH-ConfigCommon, that is, the first configuration information is RACH-ConfigCommon.
  • satisfying the first condition is: the total occupation time of PRACH resources obtained according to the configuration information of RACH-ConfigCommon and RACH-ConfigDedicated within every 100ms is not more than 10ms; and/or, not satisfying the first condition is: every The total occupation time of the PRACH resources acquired according to the configuration information of RACH-ConfigCommon and RACH-ConfigDedicated within 100ms exceeds 10ms.
  • the meeting the first condition includes: the total occupation time of the first resource within every 100ms is no more than 10ms; and/or, the failure to meet the first condition includes: The total duration of occupation of a resource exceeds 10 ms, where the first resource is a resource occupied by transmitting the first physical channel.
  • the first physical channel includes the PRACH and the physical channel corresponding to MsgA.
  • satisfying the first condition is: the total occupation time of resources for transmitting PRACH and MsgA within every 100ms is not more than 10ms; and/or not satisfying the first condition is: transmitting resources for PRACH and MsgA within every 100ms
  • the total occupied time exceeds 10ms.
  • the meeting the first condition includes: the total occupancy time of the resource used to transmit the first physical channel and the second resource obtained according to the first configuration information within every 100 ms does not exceed 10 ms; and/or , the failure to meet the first condition includes: the total occupancy time of the resources used to transmit the first physical channel and the second resources acquired according to the first configuration information within every 100 ms exceeds 10 ms, wherein the first configuration The information is used to obtain the first resource.
  • the occupation duration of the second resource may be the duration occupied by DBTW every 100ms, or the occupation duration of the second resource may be the duration occupied by resources used for SSB transmission within every 100ms, or the occupation duration of the second resource may be the duration occupied by the resources used for SSB transmission within every 100ms.
  • the duration of resource occupation for transmitting SSB may be the duration occupied by DBTW every 100ms, or the occupation duration of the second resource may be the duration occupied by resources used for SSB transmission within every 100ms, or the occupation duration of the second resource may be the duration occupied by the resources used for SSB transmission within every 100ms.
  • the satisfying the first condition includes: within every 100 ms, the resources used to transmit the first physical channel and the second resources obtained according to multiple pieces of configuration information occupy a total duration of no more than 10 ms; and/or , the failure to meet the first condition includes: the resources used to transmit the first physical channel and the second resources obtained according to multiple configuration information within every 100 ms occupy a total duration of more than 10 ms, wherein the multiple configurations
  • the information includes first configuration information, and the first configuration information is used to obtain the first resource.
  • the occupation duration of the second resource may be the duration occupied by DBTW every 100ms, or the occupation duration of the second resource may be the duration occupied by resources used for SSB transmission within every 100ms, or the occupation duration of the second resource may be the duration occupied by the resources used for SSB transmission within every 100ms.
  • the duration of resource occupation for transmitting SSB may be the duration occupied by DBTW every 100ms, or the occupation duration of the second resource may be the duration occupied by resources used for SSB transmission within every 100ms, or the occupation duration of the second resource may be the duration occupied by the resources used for SSB transmission within every 100ms.
  • the meeting the first condition includes: the total occupation time of the first resource and the second resource within every 100ms does not exceed 10ms; and/or, the failure to meet the first condition includes: every 100ms The total occupation time of the first resource and the second resource exceeds 10 ms, wherein the first resource is a resource occupied by transmitting the first physical channel.
  • the occupation duration of the second resource may be the duration occupied by DBTW every 100ms, or the occupation duration of the second resource may be the duration occupied by resources used for SSB transmission within every 100ms, or the occupation duration of the second resource may be the duration occupied by the resources used for SSB transmission within every 100ms. The duration of resource occupation for transmitting SSB.
  • the terminal device determines whether to perform a channel access process before the first physical channel transmission according to whether the first condition is met, including:
  • the terminal device determines not to perform a channel access process before the first physical channel transmission; or,
  • the terminal device determines that a channel access procedure is to be performed before transmission on the first physical channel.
  • the channel access type of the first physical channel is a preset channel access type.
  • the preset channel access type may be one of type 1 channel access, type 2 channel access and type 3 channel access.
  • the first indication information is used to determine whether to perform a channel access process before the transmission of the first physical channel, and the behavior of the terminal device includes one or more of the following:
  • the terminal device If it is determined according to the first indication information that the channel access process is not performed before the transmission of the first physical channel, the terminal device does not perform the channel access process before transmitting the first physical channel;
  • the terminal device transmits the first physical channel according to the first resource and the first indication information, including : The terminal device directly transmits the first physical channel through the first resource without performing a channel access process;
  • the terminal device determines whether the first resource is available for transmission of the first physical channel according to type 1 channel access. channel;
  • the terminal device transmits the first physical channel according to the first resource and the first indication information, including: The terminal device performs a channel access process according to type 1 channel access, and transmits the first physical channel through the first resource after the channel access is successful;
  • the terminal device determines whether the first resource is available for transmission of the first physical channel according to type 2 channel access; as well as
  • the terminal device transmits the first physical channel according to the first resource and the first indication information, including : The terminal device performs a channel access process according to type 2 channel access, and transmits the first physical channel through the first resource after the channel access is successful.
  • the first indication information is used to determine the channel access type of the first physical channel, including: the first indication information is used to indicate the channel access type of the first physical channel.
  • the channel access type of the first physical channel is one of type 1 channel access, type 2 channel access, and type 3 channel access.
  • the first indication information is used to determine the channel access type of the first physical channel, and the behavior of the terminal device includes one or more of the following:
  • the terminal device determines whether the first resource can be used to transmit the a first physical channel
  • the terminal device transmits the first physical channel according to the first resource and the first indication information , including: the terminal device performs a channel access process according to type 1 channel access, and transmits the first physical channel through the first resource after the channel access is successful;
  • the terminal device determines whether the first resource can be used to transmit the a first physical channel
  • the terminal device transmits the first physical channel according to the first resource and the first indication information , including: the terminal device performs a channel access process according to type 2 channel access, and transmits the first physical channel through the first resource after the channel access is successful;
  • the terminal device If it is determined according to the first indication information that the channel access type of the first physical channel is type 3 channel access, the terminal device does not perform a channel access process before transmitting the first physical channel;
  • the terminal device transmits the first physical channel according to the first resource and the first indication information , including: the terminal device directly transmits the first physical channel through the first resource without performing a channel access process.
  • the type 1 channel access may be, for example, channel access of multi-slot channel detection based on random backoff of fixed contention window length.
  • the Type 1 channel access may include some or all of the following steps:
  • the type 2 channel access may be, for example, channel access based on channel detection with a fixed detection slot length.
  • the type 3 channel access may be, for example, channel access that does not require channel detection.
  • the first indication information has an association relationship with the first resource.
  • the first resource is obtained through first configuration information, and the first indication information has an association relationship with the first configuration information.
  • the first configuration information is a system message or dedicated RRC signaling for configuring common random access parameters of a cell, and the first indication information is carried in the first configuration information.
  • the first resource is a PRACH resource
  • the first configuration information is RACH-ConfigCommon
  • the PRACH resource is configured through the RACH-ConfigCommon
  • the first indication information is carried in the RACH-ConfigCommon.
  • the first resource is a MsgA resource
  • the first configuration information is MsgA-ConfigCommon
  • the MsgA resource is configured through MsgA-ConfigCommon
  • the first indication information is carried in one of the following configuration information: MsgA-ConfigCommon, rach-ConfigCommonTwoStepRA, and msgA-PUSCH-Config.
  • the first configuration information is dedicated RRC signaling for configuring dedicated random access parameters, and the first indication information is carried in the first configuration information.
  • the first resource is a PRACH resource
  • the first configuration information is RACH-ConfigDedicated
  • the PRACH resource is configured through the RACH-ConfigDedicated
  • the first indication information is carried in the RACH-ConfigDedicated.
  • the first resource is the MsgA resource
  • the first configuration information is RACH-ConfigDedicated
  • the MsgA resource is configured through the RACH-ConfigDedicated
  • the first indication information is carried in the RACH-ConfigDedicated.
  • the first configuration information is first RRC signaling configured for PRACH resources requested by a system message, and the first indication information is carried in the first RRC signaling.
  • the first RRC signaling is dedicated RRC signaling for configuring common random access parameters of the cell.
  • the first RRC signaling is SI-RequestConfig.
  • the first configuration information is second RRC signaling configuring PRACH resources for BFR, and the first indication information is carried in the second RRC signaling.
  • the second RRC signaling is dedicated RRC signaling for configuring dedicated random access parameters.
  • the second RRC signaling is BeamFailureRecoveryConfig.
  • FIG. 5 is a schematic structural diagram of a terminal device provided by an embodiment of the present application.
  • the terminal device 500 in FIG. 5 includes a receiving module 510 and a transmitting module 520 .
  • the receiving module 510 may be configured to receive first indication information.
  • the first indication information is used to determine whether a channel access process is to be performed before the transmission of the first physical channel, or the first indication information is used to determine the channel access type of the first physical channel.
  • the transmission module 520 may be configured to transmit the first physical channel according to the first resource and the first indication information, where the first resource is used to transmit the first physical channel.
  • the first physical channel comprises PRACH.
  • the first physical channel includes a physical channel corresponding to MsgA, wherein the physical channel corresponding to MsgA includes PRACH and/or PUSCH.
  • the first physical channel may include PRACH and a physical channel corresponding to MsgA.
  • the first indication information is used to determine whether to perform a channel access process before the first physical channel transmission, including: the first indication information is used to indicate that before the first physical channel transmission A channel access process is to be performed, or the first indication information is used to indicate not to perform a channel access process before the first physical channel transmission.
  • the first indication information is used to determine whether to perform a channel access process before the first physical channel transmission, including: the first indication information is used to determine whether to support short control signaling transmission, the The terminal device determines whether to perform a channel access process before the first physical channel transmission according to whether it supports short control signaling transmission.
  • the terminal device determines whether to perform a channel access procedure before the transmission of the first physical channel according to whether short control signaling transmission is supported, including at least one of the following situations: when short control signaling is not supported During signaling transmission, the terminal device determines to perform a channel access process before the first physical channel transmission; when supporting short control signaling transmission, the terminal device determines not to perform a channel access process before the first physical channel transmission Performing a channel access process; when supporting short control signaling transmission, the terminal device determines whether to perform a channel access process before the first physical channel transmission according to whether a first condition is satisfied.
  • whether the first condition is satisfied includes one or more of the following: whether the total occupation time of resources used to transmit the first physical channel acquired according to the first configuration information meets the duty cycle Conditions; whether the total occupation time of resources used to transmit the first physical channel obtained according to multiple configuration information meets the duty cycle condition; whether the total occupation time of the first resource meets the duty cycle condition; according to the first Whether the total occupancy duration of the resource used to transmit the first physical channel and the second resource acquired by the configuration information satisfies the duty cycle condition; the resource used to transmit the first physical channel and the second resource acquired according to multiple configuration information Whether the total occupied time of the second resource satisfies the duty cycle condition; and whether the total occupied time of the first resource and the second resource satisfies the duty cycle condition; wherein, the first configuration information is used to obtain the The first resource; wherein, the plurality of configuration information includes the first configuration information; wherein, the second resource is a resource occupied by DBTW, or the second resource is a resource used to transmit SSB, or
  • the duty ratio condition includes that the total occupied duration in each cycle does not exceed a first duration, wherein the duration of the cycle is 100 ms, and the length of the first duration is 10 ms.
  • the terminal device determines whether to perform a channel access process before the first physical channel transmission according to whether the first condition is satisfied, including: when the first condition is satisfied, the terminal device determines Not performing a channel access process before the first physical channel transmission; or, when the first condition is not satisfied, the terminal device determines to perform a channel access process before the first physical channel transmission.
  • the channel access type of the first physical channel is a preset channel access type.
  • the first indication information is used to determine whether to perform a channel access procedure before the transmission of the first physical channel
  • the behavior of the terminal device includes one or more of the following: if according to The first indication information determines that the channel access process is not performed before the transmission of the first physical channel, then the terminal device does not perform the channel access process before transmitting the first physical channel; if according to the first The indication information determines that the channel access process is not performed before the transmission of the first physical channel, and the terminal device transmits the first physical channel according to the first resource and the first indication information, including: the terminal equipment does not Perform a channel access process, and directly transmit the first physical channel through the first resource; if it is determined according to the first indication information to perform a channel access process before the transmission of the first physical channel, the terminal device Determine whether the first resource can be used to transmit the first physical channel according to type 1 channel access; if it is determined according to the first indication information that a channel access process is performed before the transmission of the first physical channel, then the The terminal device transmits the first physical
  • a resource transmits the first physical channel; if it is determined according to the first indication information that a channel access process is performed before the transmission of the first physical channel, the terminal device determines whether the first resource is based on type 2 channel access may be used to transmit the first physical channel; and if the first indication information is used to determine to perform a channel access process before the transmission of the first physical channel, the terminal device, according to the first resource and the first Instructing information to transmit the first physical channel includes: the terminal device performs a channel access process according to type 2 channel access, and transmits the first physical channel through the first resource after the channel access is successful.
  • the first indication information is used to determine the channel access type of the first physical channel, including: the first indication information is used to indicate the channel access type of the first physical channel.
  • the channel access type of the first physical channel is one of type 1 channel access, type 2 channel access, and type 3 channel access.
  • the first indication information is used to determine the channel access type of the first physical channel
  • the behavior of the terminal device includes one or more of the following: if according to the first indication information determines that the channel access type of the first physical channel is type 1 channel access, then the terminal device determines whether the first resource can be used to transmit the first physical channel according to the type 1 channel access; if according to The first indication information determines that the channel access type of the first physical channel is type 1 channel access, and the terminal device transmits the first physical channel according to the first resource and the first indication information, including : The terminal device performs a channel access process according to type 1 channel access, and transmits the first physical channel through the first resource after the channel access is successful; if the first physical channel is determined according to the first indication information The channel access type of a physical channel is type 2 channel access, then the terminal device determines whether the first resource can be used to transmit the first physical channel according to the type 2 channel access; if according to the first indication information determines that the channel access type of the first physical channel is type 2
  • the type 1 channel access is channel access based on random back-off multi-slot channel detection with a fixed contention window length; and/or, the type 2 channel access is based on a fixed detection time slot Channel access with channel detection of length; and/or, the type 3 channel access is channel access that does not require channel detection.
  • the first indication information is associated with the first resource; or, the first resource is obtained through first configuration information, and the first indication information is associated with the first configuration Information is related.
  • the first configuration information is a system message or dedicated RRC signaling for configuring common random access parameters of a cell, and the first indication information is carried in the first configuration information.
  • the first indication information is carried in the first configuration information, including at least one of the following situations: the first resource is a PRACH resource, and the first configuration information is RACH-ConfigCommon , the PRACH resource is configured through RACH-ConfigCommon, the first indication information is carried in the RACH-ConfigCommon; the first resource is a MsgA resource, the first configuration information is MsgA-ConfigCommon, and the MsgA resource Through MsgA-ConfigCommon configuration, the first indication information is carried in one of the following configuration information: MsgA-ConfigCommon, rach-ConfigCommonTwoStepRA, and msgA-PUSCH-Config.
  • the first configuration information is dedicated RRC signaling for configuring dedicated random access parameters, and the first indication information is carried in the first configuration information.
  • the first indication information is carried in the first configuration information, including at least one of the following situations: the first resource is a PRACH resource, and the first configuration information is RACH-ConfigDedicated , the PRACH resource is configured through RACH-ConfigDedicated, and the first indication information is carried in RACH-ConfigDedicated; the first resource is a MsgA resource, and the first configuration information is RACH-ConfigDedicated, and the MsgA resource is configured through a RACH - ConfigDedicated configuration, the first indication information is carried in RACH-ConfigDedicated.
  • the first configuration information is first RRC signaling configured for PRACH resources requested by a system message, and the first indication information is carried in the first RRC signaling.
  • the first RRC signaling is SI-RequestConfig.
  • the first configuration information is second RRC signaling configuring PRACH resources for beam failure recovery BFR, and the first indication information is carried in the second RRC signaling.
  • the second RRC signaling is BeamFailureRecoveryConfig.
  • FIG. 6 is a schematic structural diagram of a network device provided by an embodiment of the present application.
  • the network device 600 in FIG. 6 includes a sending module 610 and a receiving module 620 .
  • the sending module 610 may be configured to send first indication information to the terminal device, where the first indication information is used to determine whether a channel access process is to be performed before the first physical channel transmission, or the first indication information is used to determine the The channel access type of the first physical channel;
  • the receiving module 620 may be configured to receive the first physical channel according to the first resource and the first indication information, where the first resource is used to transmit the first physical channel. Alternatively, the receiving module 620 may be configured to receive the first physical channel according to a first resource, where the first resource is used to transmit the first physical channel.
  • the first physical channel comprises PRACH.
  • the first physical channel includes a physical channel corresponding to MsgA, wherein the physical channel corresponding to MsgA includes PRACH and/or PUSCH.
  • the first physical channel may include PRACH and a physical channel corresponding to MsgA.
  • the first indication information is used to determine whether to perform a channel access process before the first physical channel transmission, including: the first indication information is used to indicate that before the first physical channel transmission A channel access process is to be performed, or the first indication information is used to indicate not to perform a channel access process before the first physical channel transmission.
  • the first indication information is used to determine whether to perform a channel access process before the first physical channel transmission, including: the first indication information is used to determine whether to support short control signaling transmission, the The terminal device determines whether to perform a channel access process before the first physical channel transmission according to whether it supports short control signaling transmission.
  • the terminal device determines whether to perform a channel access procedure before the transmission of the first physical channel according to whether short control signaling transmission is supported, including at least one of the following situations: when short control signaling is not supported During signaling transmission, the terminal device determines to perform a channel access process before the first physical channel transmission; when supporting short control signaling transmission, the terminal device determines not to perform a channel access process before the first physical channel transmission Performing a channel access process; when supporting short control signaling transmission, the terminal device determines whether to perform a channel access process before the first physical channel transmission according to whether a first condition is satisfied.
  • whether the first condition is satisfied includes one or more of the following: whether the total occupation time of resources used to transmit the first physical channel acquired according to the first configuration information meets the duty cycle Conditions; whether the total occupation time of resources used to transmit the first physical channel obtained according to multiple configuration information meets the duty cycle condition; whether the total occupation time of the first resource meets the duty cycle condition; according to the first Whether the total occupancy duration of the resource used to transmit the first physical channel and the second resource acquired by the configuration information satisfies the duty cycle condition; the resource used to transmit the first physical channel and the second resource acquired according to multiple configuration information Whether the total occupied time of the second resource satisfies the duty cycle condition; and whether the total occupied time of the first resource and the second resource satisfies the duty cycle condition; wherein, the first configuration information is used to obtain the The first resource; wherein, the plurality of configuration information includes the first configuration information; wherein, the second resource is a resource occupied by DBTW, or the second resource is a resource used to transmit SSB, or
  • the duty ratio condition includes that the total occupied duration in each cycle does not exceed a first duration, wherein the duration of the cycle is 100 ms, and the length of the first duration is 10 ms.
  • the terminal device determines whether to perform a channel access process before the first physical channel transmission according to whether the first condition is satisfied, including: when the first condition is satisfied, the terminal device determines Not performing a channel access process before the first physical channel transmission; or, when the first condition is not satisfied, the terminal device determines to perform a channel access process before the first physical channel transmission.
  • the channel access type of the first physical channel is a preset channel access type.
  • the first indication information is used to determine whether to perform a channel access procedure before the transmission of the first physical channel
  • the behavior of the terminal device includes one or more of the following: if according to The first indication information determines that the channel access process is not performed before the transmission of the first physical channel, then the terminal device does not perform the channel access process before transmitting the first physical channel; if according to the first The indication information determines that the channel access process is not performed before the transmission of the first physical channel, and the terminal device transmits the first physical channel according to the first resource and the first indication information, including: the terminal equipment does not Perform a channel access process, and directly transmit the first physical channel through the first resource; if it is determined according to the first indication information to perform a channel access process before the transmission of the first physical channel, the terminal device Determine whether the first resource can be used to transmit the first physical channel according to type 1 channel access; if it is determined according to the first indication information that a channel access process is performed before the transmission of the first physical channel, then the The terminal device transmits the first physical
  • a resource transmits the first physical channel; if it is determined according to the first indication information that a channel access process is performed before the transmission of the first physical channel, the terminal device determines whether the first resource is based on type 2 channel access may be used to transmit the first physical channel; and if the first indication information is used to determine to perform a channel access process before the transmission of the first physical channel, the terminal device, according to the first resource and the first Instructing information to transmit the first physical channel includes: the terminal device performs a channel access process according to type 2 channel access, and transmits the first physical channel through the first resource after the channel access is successful.
  • the first indication information is used to determine the channel access type of the first physical channel, including: the first indication information is used to indicate the channel access type of the first physical channel.
  • the channel access type of the first physical channel is one of type 1 channel access, type 2 channel access, and type 3 channel access.
  • the first indication information is used to determine the channel access type of the first physical channel
  • the behavior of the terminal device includes one or more of the following: if according to the first indication information determines that the channel access type of the first physical channel is type 1 channel access, then the terminal device determines whether the first resource can be used to transmit the first physical channel according to the type 1 channel access; if according to The first indication information determines that the channel access type of the first physical channel is type 1 channel access, and the terminal device transmits the first physical channel according to the first resource and the first indication information, including : The terminal device performs a channel access process according to type 1 channel access, and transmits the first physical channel through the first resource after the channel access is successful; if the first physical channel is determined according to the first indication information The channel access type of a physical channel is type 2 channel access, then the terminal device determines whether the first resource can be used to transmit the first physical channel according to the type 2 channel access; if according to the first indication information determines that the channel access type of the first physical channel is type 2
  • the type 1 channel access is channel access based on random back-off multi-slot channel detection with a fixed contention window length; and/or, the type 2 channel access is based on a fixed detection time slot Channel access with channel detection of length; and/or, the type 3 channel access is channel access that does not require channel detection.
  • the first indication information is associated with the first resource; or, the first resource is obtained through first configuration information, and the first indication information is associated with the first configuration Information is related.
  • the first configuration information is a system message or dedicated RRC signaling for configuring common random access parameters of a cell, and the first indication information is carried in the first configuration information.
  • the first indication information is carried in the first configuration information, including at least one of the following situations: the first resource is a PRACH resource, and the first configuration information is RACH-ConfigCommon , the PRACH resource is configured through RACH-ConfigCommon, the first indication information is carried in the RACH-ConfigCommon; the first resource is a MsgA resource, the first configuration information is MsgA-ConfigCommon, and the MsgA resource Through MsgA-ConfigCommon configuration, the first indication information is carried in one of the following configuration information: MsgA-ConfigCommon, rach-ConfigCommonTwoStepRA, and msgA-PUSCH-Config.
  • the first configuration information is dedicated RRC signaling for configuring dedicated random access parameters, and the first indication information is carried in the first configuration information.
  • the first indication information is carried in the first configuration information, including at least one of the following situations: the first resource is a PRACH resource, and the first configuration information is RACH-ConfigDedicated , the PRACH resource is configured through RACH-ConfigDedicated, and the first indication information is carried in RACH-ConfigDedicated; the first resource is a MsgA resource, and the first configuration information is RACH-ConfigDedicated, and the MsgA resource is configured through a RACH - ConfigDedicated configuration, the first indication information is carried in RACH-ConfigDedicated.
  • the first configuration information is first RRC signaling configured for PRACH resources requested by a system message, and the first indication information is carried in the first RRC signaling.
  • the first RRC signaling is SI-RequestConfig.
  • the first configuration information is second RRC signaling configuring PRACH resources for beam failure recovery BFR, and the first indication information is carried in the second RRC signaling.
  • the second RRC signaling is BeamFailureRecoveryConfig.
  • Fig. 7 is a schematic structural diagram of a device according to an embodiment of the present application.
  • the dotted line in Figure 7 indicates that the unit or module is optional.
  • the apparatus 700 may be used to implement the methods described in the foregoing method embodiments.
  • Apparatus 700 may be a chip, a terminal device or a network device.
  • Apparatus 700 may include one or more processors 710 .
  • the processor 710 may support the device 700 to implement the methods described in the foregoing method embodiments.
  • the processor 710 may be a general purpose processor or a special purpose processor.
  • the processor may be a central processing unit (central processing unit, CPU).
  • the processor can also be other general-purpose processors, digital signal processors (digital signal processors, DSPs), application specific integrated circuits (application specific integrated circuits, ASICs), off-the-shelf programmable gate arrays (field programmable gate arrays, FPGAs) Or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.
  • a general-purpose processor may be a microprocessor, or the processor may be any conventional processor, or the like.
  • Apparatus 700 may also include one or more memories 720 .
  • a program is stored in the memory 720, and the program can be executed by the processor 710, so that the processor 710 executes the methods described in the foregoing method embodiments.
  • the memory 720 may be independent from the processor 710 or may be integrated in the processor 710 .
  • Apparatus 700 may also include a transceiver 730 .
  • the processor 710 can communicate with other devices or chips through the transceiver 730 .
  • the processor 710 may send and receive data with other devices or chips through the transceiver 730 .
  • the embodiment of the present application also provides a computer-readable storage medium for storing programs.
  • the computer-readable storage medium can be applied to the terminal device or the network device provided in the embodiments of the present application, and the program enables the computer to execute the methods performed by the terminal device or the network device in the various embodiments of the present application.
  • the embodiment of the present application also provides a computer program product.
  • the computer program product includes programs.
  • the computer program product can be applied to the terminal device or the network device provided in the embodiments of the present application, and the program enables the computer to execute the methods performed by the terminal device or the network device in the various embodiments of the present application.
  • the embodiment of the present application also provides a computer program.
  • the computer program can be applied to the terminal device or the network device provided in the embodiments of the present application, and the computer program enables the computer to execute the methods performed by the terminal device or the network device in the various embodiments of the present application.
  • B corresponding to A means that B is associated with A, and B can be determined according to A.
  • determining B according to A does not mean determining B only according to A, and B may also be determined according to A and/or other information.
  • sequence numbers of the above-mentioned processes do not mean the order of execution, and the execution order of the processes should be determined by their functions and internal logic, and should not be used in the embodiments of the present application.
  • the implementation process constitutes any limitation.
  • 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.
  • all or part of them may be implemented by software, hardware, firmware or any combination thereof.
  • software When implemented using software, it may be implemented in whole or in part in the form of a computer program product.
  • the computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on the computer, the processes or functions according to the embodiments of the present application will be generated in whole or in part.
  • the computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable devices.
  • the computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website, computer, server or data center Transmission to another website site, computer, server or data center by wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.).
  • the computer-readable storage medium may be any available medium that can be read by a computer, or a data storage device such as a server or a data center integrated with one or more available media.
  • the available medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a digital versatile disc (digital video disc, DVD)) or a semiconductor medium (for example, a solid state disk (solid state disk, SSD) )wait.
  • a magnetic medium for example, a floppy disk, a hard disk, a magnetic tape
  • an optical medium for example, a digital versatile disc (digital video disc, DVD)
  • a semiconductor medium for example, a solid state disk (solid state disk, SSD)

Abstract

L'invention concerne un procédé de communication sans fil, un dispositif terminal et un dispositif de réseau. Le procédé consiste à : recevoir, par un dispositif terminal, des premières informations d'indication, les premières informations d'indication servant à déterminer s'il convient d'exécuter une procédure d'accès au canal avant la transmission d'un premier canal physique, ou servant à déterminer un type d'accès au canal du premier canal physique; et transmettre, par le dispositif terminal, le premier canal physique conformément à une première ressource et aux premières informations d'indication, la première ressource étant utilisée pour transmettre le premier canal physique. Au moyen de la solution technique fournie dans les modes de réalisation de la présente demande, pendant une procédure d'accès aléatoire, le dispositif terminal détermine, conformément aux premières informations d'indication, s'il convient d'exécuter le processus d'accès au canal avant que le premier canal physique ne soit transmis et/ou détermine le type d'accès au canal exécuté avant que le premier canal physique ne soit transmis. Le fait de permettre au dispositif terminal de transmettre le premier canal physique dans une certaine condition sans exécuter d'accès au canal permet d'améliorer la probabilité de transmission du premier canal physique pendant la procédure d'accès aléatoire lorsqu'il est garanti que l'utilisation d'un spectre partagé est équitable et rationnelle.
PCT/CN2022/071102 2022-01-10 2022-01-10 Procédé de communication sans fil, dispositif terminal et dispositif de réseau WO2023130467A1 (fr)

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