WO2023245407A1 - Procédé de communication, dispositif terminal et dispositif de réseau - Google Patents

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

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Publication number
WO2023245407A1
WO2023245407A1 PCT/CN2022/100053 CN2022100053W WO2023245407A1 WO 2023245407 A1 WO2023245407 A1 WO 2023245407A1 CN 2022100053 W CN2022100053 W CN 2022100053W WO 2023245407 A1 WO2023245407 A1 WO 2023245407A1
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WIPO (PCT)
Prior art keywords
ssb
value
indication information
prach
transmission resource
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PCT/CN2022/100053
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English (en)
Chinese (zh)
Inventor
崔胜江
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Oppo广东移动通信有限公司
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Priority to PCT/CN2022/100053 priority Critical patent/WO2023245407A1/fr
Publication of WO2023245407A1 publication Critical patent/WO2023245407A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA

Definitions

  • the present application relates to the field of communication, and more specifically, to a communication method, terminal equipment and network equipment.
  • PUSCH Physical Uplink Shared CHannel
  • PUCCH Physical Uplink Control Channel
  • Msg3 Message 3
  • Embodiments of the present application provide a communication method, terminal equipment, and network equipment.
  • the embodiment of the present application provides a communication method, including:
  • the terminal equipment receives first indication information; the first indication information is used to indicate whether to perform repeated transmission of the physical random access channel PRACH.
  • the embodiment of the present application provides a communication method, including:
  • the network device sends first indication information; the first indication information is used to instruct the terminal device whether to perform repeated transmission of the physical random access channel PRACH.
  • An embodiment of the present application provides a terminal device, including:
  • the first communication unit is configured to receive first indication information; the first indication information is used to indicate whether to perform repeated transmission of the physical random access channel PRACH.
  • This embodiment of the present application provides a network device, including:
  • the second communication unit is configured to send first indication information; the first indication information is used to instruct the terminal device whether to perform repeated transmission of the physical random access channel PRACH.
  • An embodiment of the present application provides a terminal device, including a processor and a memory.
  • the memory is used to store computer programs, and the processor is used to call and run the computer program stored in the memory, so that the terminal device performs the above communication method.
  • An embodiment of the present application provides a network device, including a processor and a memory.
  • the memory is used to store computer programs
  • the processor is used to call and run the computer programs stored in the memory, so that the network device performs the above communication method.
  • An embodiment of the present application provides a network device, including a processor and a memory.
  • the memory is used to store computer programs
  • the processor is used to call and run the computer programs stored in the memory, so that the network device performs the above communication method.
  • An embodiment of the present application provides a chip for implementing the above communication method.
  • the chip includes: a processor, configured to call and run a computer program from the memory, so that the device installed with the chip executes the above-mentioned communication method.
  • Embodiments of the present application provide a computer-readable storage medium for storing a computer program.
  • the computer program When the computer program is run by a device, it causes the device to perform the above communication method.
  • An embodiment of the present application provides a computer program product, which includes computer program instructions, and the computer program instructions cause the computer to execute the above communication method.
  • An embodiment of the present application provides a computer program that, when run on a computer, causes the computer to perform the above communication method.
  • An embodiment of the present application provides a communication system, including: a terminal device for performing the above communication method; and a network device for performing the above communication method.
  • the terminal device may be instructed whether to perform repeated transmission of PRACH.
  • the terminal device can be added with the function of enabling repeated transmission of PRACH, and then perform repeated transmission of PRACH based on instructions from the network device when necessary.
  • the terminal equipment can support repeated transmission of PRACH, thereby ensuring that the coverage of PRACH is enhanced when PRACH is repeatedly transmitted.
  • Figure 1 is a schematic diagram of an application scenario according to an embodiment of the present application.
  • Figure 2 is a schematic diagram of a time domain configuration of PRACH resources.
  • Figure 3 is a schematic diagram of resource configuration in the PRACH frequency domain.
  • Figure 4 is a schematic diagram of the mapping relationship between SSB and RO.
  • Figure 5 is a schematic flow chart of a communication method according to an embodiment of the present application.
  • Figure 6 is a schematic flow chart of a communication method according to another embodiment of the present application.
  • Figure 7 is a schematic diagram of the composition of DCI format 1_0 according to an embodiment of the present application.
  • Figures 8 to 14 are diagrams illustrating various examples of composition patterns of multiple target transmission resources according to embodiments of the present application.
  • Figure 15 is a schematic block diagram of a terminal device according to an embodiment of the present application.
  • Figure 16 is a schematic block diagram of a network device according to an embodiment of the present application.
  • Figure 17 is a schematic block diagram of a communication device according to an embodiment of the present application.
  • Figure 18 is a schematic block diagram of a chip according to an embodiment of the present application.
  • Figure 19 is a schematic block diagram of a communication system according to an embodiment of the present application.
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • LTE-A Advanced long term evolution
  • NR New Radio
  • NTN Non-Terrestrial Networks
  • UMTS Universal Mobile Telecommunication System
  • WLAN Wireless Local Area Networks
  • WiFi wireless fidelity
  • 5G fifth-generation communication
  • the communication system in the embodiment of the present application can be applied to a carrier aggregation (Carrier Aggregation, CA) scenario, a dual connectivity (Dual Connectivity, DC) scenario, or a standalone (Standalone, SA)Network scene.
  • the communication system in the embodiment of the present application can be applied to unlicensed spectrum, where the unlicensed spectrum can also be considered as shared spectrum; or, the communication system in the embodiment of the present application can also be applied to licensed spectrum , among which, licensed spectrum can also be considered as non-shared spectrum.
  • the embodiments of this application describe various embodiments in combination with network equipment and terminal equipment.
  • the terminal equipment may also be called user equipment (User Equipment, UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication equipment, user agent or user device, etc.
  • the terminal device can be a station (ST) in the WLAN, a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, or a personal digital processing unit.
  • SIP Session Initiation Protocol
  • WLL wireless Local Loop
  • PDA Personal Digital Assistant
  • 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 terminal devices in NR networks, or in the future Terminal equipment in the evolved Public Land Mobile Network (PLMN) network, etc.
  • PLMN Public Land Mobile Network
  • the terminal device can be deployed on land, including indoor or outdoor, handheld, wearable or vehicle-mounted; it can also be deployed on water (such as ships, etc.); it can also be deployed in the air (such as aircraft, balloons and satellites). superior).
  • the terminal device may be a mobile phone (Mobile Phone), a tablet computer (Pad), a computer with a wireless transceiver function, a virtual reality (Virtual Reality, VR) terminal device, or an augmented reality (Augmented Reality, AR) terminal.
  • the terminal device may also be a wearable device.
  • Wearable devices can also be called wearable smart devices. It is a general term for applying wearable technology to intelligently design daily wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes, etc.
  • 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 just hardware devices, but also achieve powerful functions through software support, data interaction, and cloud interaction.
  • wearable smart devices include full-featured, large-sized devices that can achieve complete or partial functions without relying on smartphones, such as smart watches or smart glasses, and those that only focus on a certain type of application function and need to cooperate with other devices such as smartphones.
  • the network device may be a device used to communicate with mobile devices.
  • the network device may be an access point (Access Point, AP) in WLAN, or a base station (Base Transceiver Station, BTS) in GSM or CDMA.
  • BTS Base Transceiver Station
  • it can be a base station (NodeB, NB) in WCDMA, or an evolutionary base station (Evolutional Node B, eNB or eNodeB) in LTE, or a relay station or access point, or a vehicle-mounted device, a wearable device, and an NR network network equipment (gNB) or network equipment in the future evolved PLMN network or network equipment in the NTN network, etc.
  • AP Access Point
  • BTS Base Transceiver Station
  • NodeB, NB base station
  • Evolutional Node B, eNB or eNodeB evolution base station
  • gNB NR network network equipment
  • the network device may have mobile characteristics, for example, the network device may be a mobile device.
  • the network device can be a satellite or balloon station.
  • the satellite can be a low earth orbit (LEO) satellite, a medium earth orbit (MEO) satellite, a geosynchronous orbit (geostationary 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, water, etc.
  • network equipment can provide services for a cell, and terminal equipment communicates with the network equipment through transmission resources (for example, frequency domain resources, or spectrum resources) used by the cell.
  • the cell can be a network equipment ( For example, the cell corresponding to the base station), the cell can belong to the macro base station, or it can belong to the base station corresponding to the small cell (Small cell).
  • the small cell here can include: urban cell (Metro cell), micro cell (Micro cell), pico cell ( Pico cell), femto cell (Femto cell), etc. These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-rate data transmission services.
  • FIG. 1 illustrates a communication system 100.
  • the communication system includes a network device 110 and two terminal devices 120.
  • the communication system 100 may include multiple network devices 110 , and the coverage of each network device 110 may include other numbers of terminal devices 120 , which is not limited in this embodiment of the present application.
  • the communication system 100 may also include other network entities such as Mobility Management Entity (MME), Access and Mobility Management Function (AMF), etc.
  • MME Mobility Management Entity
  • AMF Access and Mobility Management Function
  • This application implements This example does not limit this.
  • network equipment may include access network equipment and core network equipment. That is, the wireless communication system also includes multiple core networks used to communicate with access network equipment.
  • the access network equipment can be a long-term evolution (long-term evolution, LTE) system, a next-generation (mobile communication system) (next radio, NR) system or authorized auxiliary access long-term evolution (LAA- Evolutionary base station (evolutional node B, abbreviated as eNB or e-NodeB) macro base station, micro base station (also known as "small base station"), pico base station, access point (access point, AP), Transmission point (TP) or new generation base station (new generation Node B, gNodeB), etc.
  • LTE long-term evolution
  • NR next-generation
  • LAA- Evolutionary base station evolutional node B, abbreviated as eNB or e-NodeB
  • eNB next-generation
  • NR next-generation
  • LAA- Evolutionary base station evolutional node B, abbreviated as eNB or e-NodeB
  • the communication equipment may include network equipment and terminal equipment with communication functions.
  • the network equipment and terminal equipment may be specific equipment in the embodiments of the present application, which will not be described again here; the communication equipment also It may include other devices in the communication system, such as network controllers, mobility management entities and other network entities, which are not limited in the embodiments of this application.
  • A indicates B, which can mean that A directly indicates B, for example, B can be obtained through A; it can also mean that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; it can also mean that there is an association between A and B. relation.
  • the term "correspondence" can mean that there is a direct correspondence or indirect correspondence between the two, it can also mean that there is an associated relationship between the two, or it can mean indicating and being instructed, configuration and being. Configuration and other relationships.
  • PRACH Physical Random Access CHannel
  • NR supports 4 long sequence preamble formats (both lengths are 839), of which format 0 , 1 follows the LTE format, format 0 is used for typical macro cell coverage, format 1 is used for ultra-large cell coverage, format 2 uses more sequence repetitions for coverage enhancement, and format 3 is used in high-speed mobile scenarios, such as high-speed rail.
  • NR also supports three series of short preamble formats: A, B, and C, which are suitable for different application scenarios.
  • Period of PRACH resources affects the random access delay. A shorter PRACH period can shorten the random access delay; conversely, a longer PRACH period The period causes the random access delay to increase. On the other hand, the period of PRACH resources also affects the resource overhead occupied by PRACH.
  • a distinctive feature of NR is that it needs to support beam scanning. In order to support random access requests from UEs distributed in various beams, the system needs to configure corresponding PRACH resources for each beam direction. Therefore, the NR standard supports the PRACH cycle of ⁇ 10, 20, 40, 80, 160 ⁇ ms. Network equipment can weigh various factors such as delay and system overhead to set an appropriate PRACH cycle.
  • Time domain configuration of PRACH resources In order to determine the time domain resources of PRACH, on the basis of determining the PRACH cycle, it is also necessary to further determine the time domain distribution of PRACH resources within the PRACH cycle.
  • the PRACH resource configuration information indicates the subframe number of one or more subframes where the PRACH resource is located; for FR2, in order to facilitate resource indication, the 60KHz subcarrier interval is used as a reference slot to indicate one or more subframes where the PRACH resource is located. The time slot number of the reference time slot.
  • One subframe in FR1 corresponds to a 15KHz PRACH time slot, or two 30KHz PRACH time slots (as shown in Figure 2, one subframe corresponds to two PRACH time slots); in FR2, a reference time slot refers to 60KHz. Corresponds to one 60KHz PRACH time slot, or two 120KHz PRACH time slots (as shown in Figure 2, one time slot corresponds to two PRACH time slots).
  • the network can configure one or more RO (PRACH Occasion, PRACH opportunity).
  • the so-called PRACH Occasion is the time-frequency resource that carries Preamble transmission.
  • the network can be configured within a PRACH time slot.
  • PRACH frequency domain resource configuration In the frequency domain, NR supports configuring 1, 2, 4 or 8 FDM (Frequency-division multiplexing, frequency division multiplexing) PRACH resources to expand PRACH capacity. When more than one PRACH resource is configured in the domain, these PRACH resources are continuously distributed in the frequency domain. As shown in Figure 3, the number of FDMs is equal to 4, that is, 4 PRACH resources are configured in the frequency domain.
  • the network notifies the offset of the starting PRB of the first RO resource in the frequency domain relative to the starting physical resource block (PRB) of the BWP (Bandwidth Part) (ie, BWP PRB 0 shown in Figure 3). shift.
  • PRB physical resource block
  • Layer 1 Before the physical layer random access process starts: Layer 1 will receive an SS/PBCH (Synchronization Signal and Physical Broadcast Channel) block index from the higher layer. Collection and provide a corresponding RSRP (Reference Signal Receiving Power, reference signal receiving power) measurement result to the upper layer; Layer 1 can receive from the upper layer to perform Type-1 (Type-1) random access or Type-2 (Type-2 ) Random access indication; Layer 1 receives the following information from the higher layer: (1) Configuration of PRACH transmission parameters, including PRACH preamble format, PRACH transmission time domain resources and frequency domain resources, etc.; (2) PRACH preamble The sequence determines the parameters of the root sequence and cyclic shift, such as the index of the logical root sequence list, cyclic shift (Ncs), set type (unrestricted, restricted set A, or restricted set B), etc.; when receiving a high-level or When the PRACH requested by the PDCCH command is transmitted, the random access process begins.
  • SS/PBCH Synchrom Generation
  • RSRP Reference Signal
  • PDCCH command trigger gNB tells the UE that it needs to re-initiate the random access process through a special DCI (Downlink Control Information) format 1_0; MAC (Media Access Control) , Media Access Control) layer trigger: the UE selects preamble to initiate the random access process; RRC (Radio Resource Control, Radio Resource Control) layer trigger: such as initial access, reconstruction, handover, RRC_INACTIVE (inactive) to RRC_CONNECTED (connected) ) state, request other SI (System Information, system message), RRC request during synchronous reconfiguration, etc.
  • DCI Downlink Control Information
  • MAC Media Access Control
  • RRC Radio Resource Control
  • Radio Resource Control Radio Resource Control
  • SSB Synchronization Signal Block
  • PRACH Occasion Before the UE initiates access at any time, the UE will measure and evaluate the signal quality of the cell and the signal strength of each SSB in the cell. When initiating PRACH, the UE sends preamble on the PRACH occasion corresponding to the SSB with the strongest or stronger signal. If the network successfully receives the preamble, it will learn the downlink beam information of the UE based on the PRACH occasion where the preamble is located, and then use the beam information for subsequent communications, such as msg2, msg4, etc.
  • the mapping of SSB and RO adopts frequency domain priority design, as follows: within each PRACH occasion, according to the increasing order of the preamble index; according to the increasing order of the FDM PRACH occasion number; within a PRACH slot, according to the time division multiplexing order The increasing order of the PRACH occurrence numbers used; according to the increasing order of the PRACH slot. For scenarios where the base station can only receive a single beam, multiple PRACH occasions of frequency division multiplexing can be configured to correspond to the same SSB.
  • Figure 4 shows the mapping relationship between SSB and RO at different SSB_per_RO (1/4, 1/2, 1, 2, 8). As shown in part 401 in Figure 4, it is assumed that all SSBs of the system have a total of 8 SSBs.
  • time domain RO is frequency division multiplexed into 4 frequency domain ROs
  • one SSB is mapped to the same time domain RO.
  • Four frequency domain ROs in one time domain such as part 401 in Figure 4
  • SSB1 maps to the four frequency domain ROs in the first time domain
  • SSB2 maps to the four frequency domain ROs in the second time domain, etc. Wait, I won’t go into details one by one. Assume that all SSBs in the system have a total of 8 SSBs.
  • SSB1 is mapped to two frequency domain ROs in the first time domain.
  • SSB2 is mapped to the two frequency domain ROs in the first time domain, and SSB2 is located after SSB1, so we will not go into details one by one. Assume that all SSBs in the system have a total of 8 SSBs.
  • SSB1 is mapped to the first frequency domain RO in the first time domain
  • SSB2 is mapped to to the second frequency domain RO of the first time domain
  • SSB2 is located after SSB1, so we will not go into details one by one.
  • PRACH mask index (mask index) is used to determine the PRACH resource location based on the non-contention-based random access process.
  • PRACH mask index configuration methods There are four non-contention based PRACH mask index configuration methods: 1) indicated by the parameter PRACH-ConfigDedicated (dedicated configuration) -> ra-ssb-OccasionmaskIndex in message 4; 2) indicated by the parameter BeamFailureRecoveryConfig (beam failure recovery configuration) in message 4 ->ra-ssb-OccassionMakIndex indication; 3) Indicated by SI-SchedulingInfo (scheduling information)->SI-RequestResources (request resources)->ra-ssb-OccassionMakIndex in SIB1 (System Information Block1); 4 ) is indicated by PDCCH order through PRACH mask index in DCI format 1_0.
  • NR Coverage is one of the key factors that operators consider when commercializing cellular communication networks, as it directly affects service quality as well as capital expenditure and operating costs. In most scenarios of actual deployment, UL performance may be the bottleneck, while in some vertical use cases, UL traffic is large, such as video uploading. In the Rel-17 research project 900061 "NR Coverage Enhancement”, some bottleneck channels identified in the "860036" research project “NR Coverage Enhancement Research”, especially the NR coverage of PUSCH, PUCCH and Msg3, were expanded. However, due to the limited range of Rel-17WID, not all needs for coverage enhancement were met. PRACH transmission is very important in many processes, such as initial access and beam failure recovery. Therefore, how to improve the coverage performance of PRACH has become a problem that needs to be solved.
  • Figure 5 is a schematic flow chart of a communication method 500 according to an embodiment of the present application. This method can optionally be applied to the system shown in Figure 1, but is not limited thereto. The method includes at least some of the following:
  • the terminal device receives first indication information; the first indication information is used to indicate whether to perform repeated transmission of the physical random access channel PRACH.
  • Figure 6 is a schematic flowchart of a communication method 600 according to an embodiment of the present application. This method can optionally be applied to the system shown in Figure 1, but is not limited thereto. The method includes at least some of the following:
  • the network device sends first indication information; the first indication information is used to instruct the terminal device whether to perform repeated transmission of the physical random access channel PRACH.
  • the network device may be an access network device, for example, it may be a gNB, an eNB, a base station, etc., which are not exhaustive.
  • the aforementioned first indication information is used to indicate whether the terminal equipment performs repeated transmission of PRACH.
  • the first indication information may be called PRACH repetition indicator information, or an indication field of PRACH repeated transmission; it should be understood that the first indication information
  • the indication information can also be called other names, such as PRACH repetition flag (PRACH repeated transmission flag), PRACH repetition enabled (PRACH repeated transmission enable) information, msg1 repetition indicator (msg1 repeated transmission indication) information, msg1 repetition flag (flag bit of msg1 repeated transmission), msg1 repetition enabled (msg1 repeated transmission enable) information, etc.
  • PRACH repetition flag PRACH repeated transmission flag
  • PRACH repetition enabled PRACH repeated transmission enable
  • the aforementioned first indication information may be carried by any one of a variety of information or signaling; for example, the first indication information may be carried by one of the following: DCI or RRC signaling.
  • the first indication information is carried by DCI
  • the DCI may be a first DCI
  • the format of the first DCI is DCI format (format) 1_0.
  • the DCI format 1_0 is carried by PDCCH (Physical Downlink Control Channel, Physical Downlink Control CHannel).
  • the aforementioned first indication information may specifically be carried by the first DCI, that is, the first information field of DCI format 1_0.
  • the first information field may be a new information field, specifically, it may be a new information field obtained by defining one or more bits among the reserved bits.
  • the DCI format 1_0 when DCI format 1_0 is used to carry the first indication information, the DCI format 1_0 needs to meet at least one of the following three conditions: Use RNTI (Radio Network Temporary Identifier, Wireless Network Temporary Identifier) for scrambling ;
  • Use RNTI Radio Network Temporary Identifier, Wireless Network Temporary Identifier
  • the "Frequency domain resource assignment (Frequency domain resource assignment)" field (Field) is all "1"; and the Random Access Preamble index (random access preamble index number) Field is not all "0".
  • RNTI can be one of the following: C-RNTI (Cell-RNTI, temporary cell wireless network identification), TC-RNTI (Temporary Cell RNTI, temporary cell RNTI), CS-RNTI (Configured Scheduling RNTI, configuration scheduling RNTI), MCS-C-RNTI (Modulcation Coding Scheme Cell RNTI, Modulation Coding Scheme Cell RNTI).
  • C-RNTI Cell-RNTI, temporary cell wireless network identification
  • TC-RNTI Temporary Cell RNTI, temporary cell RNTI
  • CS-RNTI Configured Scheduling RNTI, configuration scheduling RNTI
  • MCS-C-RNTI Modulcation Coding Scheme Cell RNTI, Modulation Coding Scheme Cell RNTI.
  • DCI format 1_0 when DCI format 1_0 is used to carry the first indication information, the aforementioned DCI format 1_0 needs to meet all of the above three conditions. This is because if DCI format 1_0 uses C-RNTI (Cell-Radio Network Temporary Identifier, Cell Radio Network Temporary Identifier) for scrambling, and the "Frequency domain resource assignment" field is all "1", Then DCI format 1_0 is used for the random access process initiated by the PDCCH command. At this time, using the DCI format 1_0 to carry the first indication information can enable the terminal device to initiate the random access process when receiving the first indication information, and directly Determine whether to perform repeated transmission of PRACH during random access.
  • C-RNTI Cell-Radio Network Temporary Identifier, Cell Radio Network Temporary Identifier
  • the PRACH mask index (mask index number) field is used to indicate the RO associated with SS/PBCH (that is, SSB).
  • the SS/PBCH index (index number) field is used to determine the SSB used for PRACH transmission.
  • the SSB used for the above PRACH transmission and the RO associated with the SSB can enable the terminal device to determine the transmission resources to be used for this PRACH transmission or repeated transmission. .
  • Field (Field) 1 Identifier for DCI format (identifier of DCI format): 1 bit (bit), used to indicate DCI format;
  • Frequency domain resource assignment used to indicate the frequency domain resource, the x bits it occupies; x can be determined according to the actual situation, specifically it can be calculated based on the formula specified in the protocol, which is not limited here;
  • Random Access Preamble index 6 bits, used to explicitly indicate ra-PreambleIndex (random access-preamble index number);
  • UL/SUL (supplementary Uplink, supplementary uplink) indicator 1 bit, if "Random Access Preamble index" is not all 0, and the UE is configured with SUL in ServingCellConfig (serving cell configuration), the The field indicates which UL carrier is used for PRACH transmission; otherwise, this field is reserved;
  • SS/PBCH index (index number): 6 bits. If "Random Access Preamble index" is not all 0, this field indicates the SS/PBCH used to determine the RACH occasion used for PRACH transmission; otherwise, this field is reserved;
  • PRACH mask index 4 bits. If "Random Access Preamble index" is not all 0, this field indicates the RACH occurrence associated with SS/PBCH (indicated by 6-bit SS/PBCH index); otherwise, this field is reserved;
  • first indication information 1 or more bits, used to indicate whether the terminal device performs repeated transmission of PRACH;
  • reserved bits As specified in the protocol, when operating in a cell with shared spectrum channel access in FR1, or when the DCI format is monitored in the common search space in FR2-2, the reserved bits are 12 bits; otherwise , the reserved bits are 10 bits. In this example, the first indication information will occupy one or more bits of the reserved bits, so the number of reserved bits may be less than or equal to 11 bits, or the number of reserved bits may be less than or equal to 9bit.
  • Figure 7 also illustrates an arrangement order of the aforementioned Field 1 to Field 8 in the DCI format 1_0 carrying the first indication information;
  • Figure 7 is only an exemplary illustration.
  • the aforementioned Field 7 can be before Field 8 , it can also be within Field 8, or it can also be after Field 8, which are all within the protection scope of this embodiment, but it is not exhaustive.
  • the first indication information is carried by DCI, which may be a second DCI.
  • the format of the second DCI is a DCI format other than DCI format 1_0.
  • the format of the second DCI may be: among the DCI formats specified by the protocol, other DCI formats except DCI format 1_0.
  • the format of the second DCI is any one of the following: DCI format 0_0, DCI format 0_1, DCI format 1_1, DCI format 2_1, DCI format 2_2, DCI format 2_3, etc.
  • the second DCI may also be a PDCCH bearer, but the function of the second DCI is not used to instruct the terminal device to initiate a random access process. This embodiment does not limit the specific function of the second DCI.
  • the first indication information may be carried by a designated information field of the second DCI, and the designated information field may occupy one or more bits among the reserved bits of the second DCI.
  • the format of the second DCI may be a newly defined DCI format.
  • the newly defined DCI format is different from the DCI format stipulated in the aforementioned protocols.
  • the second DCI may be specifically used to indicate whether the terminal device performs repeated transmission of PRACH.
  • the first indication information may be carried by the designated information field of the second DCI, and the number of bits occupied by it may be one or more.
  • the first indication information is carried by RRC signaling.
  • the RRC signaling can be RRC signaling in any processing flow, for example, it can be RRC connection establishment signaling, RRC connection reconfiguration completion signaling, etc. All possible situations are not exhaustive here.
  • the terminal device After the terminal device performs S410, it may further include: when it is determined to perform repeated transmission of PRACH based on the first indication information, the terminal device performs repeated transmission of PRACH on multiple target transmission resources; wherein, Each target transmission resource among the plurality of target transmission resources is used for one PRACH transmission.
  • the network device after the network device performs S510, it may also include: when the first instruction information is used to instruct the terminal device to perform repeated transmission of PRACH, the network device receives repeated transmission on multiple target transmission resources. Transmitted PRACH.
  • the network device can send the first indication information to the terminal device to instruct the terminal device whether to perform repeated transmission of PRACH; if the first indication information is used to instruct the terminal device to perform repeated transmission of PRACH, the network device can On multiple target transmission resources, receive the PRACH repeatedly transmitted by the terminal device.
  • the terminal device determines whether the network device instructs it to perform repeated transmission of PRACH based on the first instruction information. If it is determined to perform repeated transmission of PRACH, Then, PRACH can be repeatedly transmitted on multiple target transmission resources.
  • the aforementioned repeated transmission of PRACH includes: the first transmission of PRACH, and one or more transmissions after the first transmission of PRACH. Since each of the plurality of target transmission resources is used for one PRACH transmission, the number of the plurality of target transmission resources is the same as the number of repeated transmissions of the PRACH.
  • the first indication information may be carried by DCI or RRC signaling. If the first indication information is carried by the first DCI, the first DCI is used to instruct the terminal device to initiate a random access process; accordingly, when receiving the first DCI, the terminal device may, based on the first DCI
  • the first indication information carried in determines whether to perform repeated transmission of PRACH. If it is determined to perform repeated transmission of PRACH, start to perform repeated transmission of PRACH on multiple target transmission resources.
  • the terminal The device can determine whether it can perform repeated transmission of PRACH according to the first indication information. If the terminal device determines that it can perform repeated transmission of PRACH, then when the terminal device initiates a random access process, it will start to perform the process on multiple target transmission resources. Repeated transmission of PRACH.
  • the terminal device may also include: when it is determined not to perform repeated transmission of the PRACH based on the first indication information, the terminal device performs one transmission of the PRACH on a selected transmission resource. That is to say, if the terminal device determines not to perform repeated transmission of PRACH based on the first indication information, then the terminal device determines to perform only one transmission of PRACH. In this case, the terminal device only transmits on the selected transmission resource. A PRACH.
  • the network device may also include: the network device receives the PRACH when the first indication information is used to instruct the terminal device not to perform repeated transmission of the PRACH.
  • a transmission resource selected by the terminal device may be a transmission resource selected according to existing protocol regulations.
  • transmission resources may specifically refer to PRACH opportunities; the PRACH opportunities may be time-frequency resources, and the PRACH opportunities may also be called ROs. It should be understood that in the following description of this disclosure, unless otherwise specified, transmission resources have the same meaning as RO, target transmission resources have the same meaning as target RO, available transmission resources have the same meaning as available RO, and will not be explained one by one below.
  • the foregoing embodiments specifically illustrate that when it is determined to perform repeated transmission of PRACH, the terminal device performs repeated transmission of PRACH on multiple target transmission resources, and the network device receives the repeatedly transmitted PRACH on multiple target transmission resources.
  • the first indication information to indicate whether to perform repeated transmission of PRACH; and under different indication methods, how the terminal equipment and the network equipment specifically determine the number of repeated transmissions of the PRACH, and how the terminal equipment and the network equipment specifically determine the number of repeated transmissions of the PRACH. How to determine multiple target transmission resources is explained in detail.
  • the network device may explicitly instruct the terminal device whether to perform repeated transmission of the PRACH through the first indication information.
  • the length of the first indication information may be 1 bit.
  • the way for the network device side to instruct the terminal device whether to perform repeated transmission of PRACH may be to instruct the terminal device to perform repeated transmission of PRACH when the value of the first indication information is a first specified value; and/ Or, when the value of the first indication information is the second specified value, it is used to instruct the terminal equipment not to perform repeated transmission of the PRACH.
  • the method for the terminal device to determine whether to perform repeated transmission of PRACH based on the first indication information may specifically include: when the value of the first indication information is a first specified value, the terminal device: Determine to perform repeated transmission of PRACH; and/or, the terminal device determines not to perform repeated transmission of PRACH when the value of the first indication information is a second specified value.
  • the first indication value is different from the second specified value, and the first specified value and the second specified value may be preconfigured.
  • the first specified value can be 0 and the second specified value can be 1; or the first specified value can be 1 and the second specified value can be 0; or other first specified values can also be set. or other second specified values.
  • the first specified value and the second specified value are different, they are all within the protection scope of this embodiment.
  • whether the terminal device performs repeated transmission of PRACH can be determined according to the first indication information of the explicit indication.
  • the terminal device and the network device also need to determine the number of repeated transmissions of PRACH.
  • the number of repeated transmissions of the PRACH is related to the first parameter, where the first parameter is used to represent the number of SSBs associated with one transmission resource.
  • the first parameter may be SSB_per_RO in the previous embodiment.
  • the SSB_per_RO can be expressed as ssb-perRACH-Occasion when configured in the system. Specifically, it can be carried by any one of the following information: carried by high-level configuration parameters.
  • the high-level configuration parameters can be ssb-perRACH-OccasionAndCB-PreamblesPerSSB.
  • msgA-SSB-PerRACH -OccasionAndCB-PreamblesSSB the number of SSBs associated with a RO in msgA, and the number of competition-based preambles for each SSB on each valid RO
  • configuration based on non-contention random access CFRA, Contention Free Rach Access
  • ssb-perRACH-Occasion carried in the message
  • ssb-PerRACH-OccasionTwoStepRA (2-step random access) carried in the CFRA configuration message
  • ssb-perRACH carried in SI (System Information)-RequestConfig (request configuration) -Occasion
  • the first parameter may be a positive number, for example, the first parameter may be less than 1, or may not be less than 1.
  • the number of SSBs associated with any transmission resource within a mapping cycle is not less than 1; that is, within a mapping cycle, one SSB or multiple SSBs can be mapped to one Transport resources.
  • the first parameter is less than 1, the number of SSBs associated with any transmission resource in one mapping cycle is less than 1, that is, one SSB can be mapped to multiple transmission resources in one mapping cycle.
  • the aforementioned mapping cycle may include: transmission resources mapped by multiple SSBs.
  • the plurality of SSBs includes a first SSB.
  • the multiple SSBs may refer to all SSBs (which may be all configured SSBs, or all SSBs actually used in communication), that is, all SSBs in the system; correspondingly, a mapping cycle may include all SSB mappings All transmission resources, each of which is used to map one or more SSBs.
  • the number of transmission resources included in a mapping cycle is related to the number of all SSBs and the aforementioned first parameter. Specifically, the number of transmission resources included in a mapping cycle may be determined by: the product of the reciprocal of the first parameter and the number of all SSBs.
  • SSB_per_RO 2 SSBs
  • each RO is used to map 2 SSBs
  • the number of all SSBs is equal to 8
  • a mapping cycle can contain 4 ROs.
  • the arrangement of RO can be arranged from low frequency to high frequency in the frequency domain, and arranged in time order in the time domain.
  • the arrangement of RO Arrangement can be from bottom to top or left to right.
  • the first SSB is the SSB used by the terminal device, and the first SSB is determined based on fourth indication information, and the fourth indication information is carried by the first DCI.
  • the fourth instruction information may be sent by the network device to the terminal device.
  • the network device sends the fourth instruction information, and the fourth instruction information is used by the terminal device to determine the first SSB, the first SSB is the SSB used by the terminal device; the fourth indication information is carried by the first DCI.
  • the terminal device receives the fourth indication information, determines the SSB used by itself based on the fourth indication information, and uses the SSB used by itself as the first SSB.
  • the definition of the first DCI has been explained in the foregoing embodiments and will not be repeated here.
  • the fourth indication information may be the SS/PBCH index carried by Field 5 in the first DCI.
  • the relevant description of the SS/PBCH index is the same as the previous embodiment and will not be described again here.
  • the first parameter is less than 1 and the first parameter is not less than 1.
  • the first parameter is not less than 1.
  • the number of repeated transmissions of the PRACH may be one of the following: equal to the first parameter; equal to the first preset value.
  • the number of repeated transmissions of the PRACH is equal to the first parameter.
  • the terminal device can determine that the number of repeated transmissions of PRACH can be equal to 1, that is, it can determine that repeated transmission of PRACH is not performed at this time. Since the first parameter is configured by the network device for the terminal device, the network device can know in advance whether the first parameter is equal to 1. If the first parameter is equal to 1, it can be determined that the terminal device will not perform repeated transmission of PRACH at this time.
  • the terminal device may determine that the number of repeated transmissions of the PRACH is equal to the first parameter. Since the first parameter is configured by the network device for the terminal device, the network device can know in advance whether the first parameter is greater than 1. If the first parameter is greater than 1, the network device can determine that the number of repeated transmissions of PRACH is equal to the first parameter. . For example, if the first parameter is 4, then the terminal device and the network device can respectively determine that the number of repeated transmissions of PRACH can be equal to 4 times.
  • the number of repeated transmissions of the PRACH is equal to the first preset value.
  • the first preset value may be set according to actual conditions, and the first preset value may be 4, 8, or more or less, and is not exhaustive here.
  • the first preset value may be preconfigured by both the terminal device and the network device, or may be sent by the network device to the terminal device in advance.
  • the setting method of the first preset value is not limited here, as long as the terminal device and the network Both devices are set with the same first preset value, which is within the protection scope of this embodiment. In this example, if the terminal device and the network device respectively learn that the first parameter is greater than or equal to 1, then the terminal device and the network device can respectively determine that the number of repeated transmissions of the PRACH can be equal to the first preset value.
  • the number of repeated transmissions of the PRACH is the first preset value; when the first parameter is greater than 1, the number of repeated transmissions of the PRACH is The maximum value of the first parameter and the first preset value; or, if the first parameter is greater than 1, the number of repeated transmissions of the PRACH is the minimum of the first parameter and the first preset value. value; or, if the first parameter is not less than 1, the number of repeated transmissions of the PRACH is a value that is not equal to 1 among the first parameter and the first preset value.
  • Which of the above methods is used to determine the number of repeated transmissions of the PRACH can be predetermined by the terminal equipment and the network equipment.
  • the terminal device and the network device can negotiate to use any one of them. As long as the terminal device and the network device determine the number of repeated transmissions of the PRACH in the same way, both are within the protection scope of this embodiment.
  • the terminal device and the network device may also respectively determine multiple target transmission resources for repeated transmission of PRACH.
  • the starting target transmission resource of the above multiple target transmission resources may be: the first available transmission resource associated with the first SSB; wherein the first available transmission resource associated with the first SSB is: the first mapping cycle The first available transmission resource associated with the first SSB.
  • the first mapping cycle may refer to the first mapping cycle after the terminal device enters the random access process; the definition of the mapping cycle has been explained in the foregoing embodiments and will not be repeated here.
  • the first SSB associated with the first SSB in the first mapping cycle An available transmission resource may be: the only available transmission resource associated with the first SSB in the first mapping cycle.
  • the only available transmission resource associated with the first SSB in the first mapping cycle may be determined based on the first parameter and the index number of the first SSB. Specifically, when the first parameter is not less than 1, the number of SSBs associated with a transmission resource is determined based on the first parameter; based on the number of SSBs associated with a transmission resource, the number of SSBs associated with each SSB in a mapping cycle is determined.
  • Transmission resources Based on the index number of the first SSB and the transmission resources associated with each SSB in a mapping cycle, the available transmission resources associated with the first SSB are determined.
  • the first available transmission resource associated with the first SSB is the index number minus one, multiplied by the number of transmission resources associated with each SSB and then plus the transmission resource at the location. If the first There are two transmission resources associated with the SSB, and the first SSB is associated with the first available transmission resource and the subsequent transmission resource. For example, the index number of the first SSB is 1, and the number of transmission resources associated with each SSB in a mapping cycle is 2, then the available transmission resources associated with the first SSB are the first and second transmission resources.
  • a mapping cycle contains 4 ROs at a time domain position, such as in Figure 8 8021 indicates a mapping cycle; assuming that the index number of the first SSB is 6, and mapping cycle 8021 is the first mapping cycle, RO 8022 is the first available transmission resource associated with the first SSB.
  • the following two methods may be used to determine the multiple target transmission resources:
  • the multiple target transmission resources include: multiple transmission resources that are continuous within one or more mapping cycles. It should be noted that the above one or more mapping cycles are one or more consecutive mapping cycles. Here, multiple consecutive transmission resources within the one or more mapping cycles, in addition to the aforementioned starting target transmission resource, regardless of whether the multiple transmission resources are associated with the first SSB, can be used to repeat PRACH. transmission.
  • the number of the plurality of target transmission resources is the same as the number of repeated transmissions of the PRACH. Therefore, after the terminal device and the network device respectively determine the initial target transmission resources, they can both determine the number of repeated transmissions of the PRACH according to the number of repeated transmissions of the PRACH. Determine the number of consecutive multiple transmission resources after the initial target transmission resource. Assume that the number of repeated transmissions of PRACH is 4. After the initial target transmission resource is determined, the initial target transmission resource and the subsequent three consecutive transmission resources are used as the multiple target transmission resources.
  • SSB_per_RO 1
  • a mapping cycle contains 8 ROs, the number of repeated transmissions of PRACH is equal to 8, the first SSB is SSB1, and the starting target RO of multiple target ROs can be:
  • the first available RO associated with SSB1 is RO 9011 in Figure 9; the multiple target ROs 9012 include: within the first mapping cycle, the starting target RO and the subsequent 7 consecutive ROs.
  • SSB_per_RO 2 ⁇ ⁇ SSB 5 ⁇ SSB 5 ⁇ SSB 5 ⁇ SSB 5 ⁇ SSB 5 ⁇ SSB 5 ⁇ SSB 5 ⁇ SSB 5 ⁇ SSB 5 ⁇ SSB 5 ⁇ SSB 5 ⁇ SSB 5 ⁇ SSB 5 ⁇ SSB 5 ⁇ SSB 5 ⁇ SSB 5 ⁇ SSB 5
  • the starting target RO of multiple target ROs can be :
  • the first available RO associated with SSB 5, which is RO 9021 in Figure 9; the multiple target ROs 9022 include: within the first mapping cycle, starting from the starting target RO and the subsequent 7 consecutive ROs.
  • the second way, the plurality of target transmission resources includes: within each mapping cycle in one or more mapping cycles, the second available transmission resource associated with the first SSB.
  • the second available transmission resources associated with the first SSB include: one or more available transmission resources associated with the first SSB.
  • the number of the multiple target transmission resources is the same as the number of repeated transmissions of the aforementioned PRACH, and when the first parameter is greater than or equal to 1, only one transmission resource in a mapping cycle is associated with the first SSB available transmission resources. Therefore, after the terminal device and the network device respectively determine the starting target transmission resource, both can determine the number of second available transmission resources associated with the first SSB after the starting target transmission resource according to the number of repeated transmissions of the PRACH. Assume that the number of repeated transmissions of PRACH is 4. After the starting target transmission resource is determined, the starting target transmission resource and the second available transmission resource associated with the first SSB in the subsequent three consecutive mapping cycles, are used as the multiple target transmission resources.
  • a mapping cycle contains 4 ROs
  • the number of repeated transmissions of PRACH is equal to 4
  • the index number of the first SSB is 5, which is SSB 5, and the second available associated with SSB 5
  • the transmission resource can be the third RO in a mapping cycle; then the starting target RO among the multiple target ROs is the third RO 1011 in the first mapping cycle.
  • the multiple target ROs 1012 include: from the Starting from the starting target RO in 1 mapping cycle (including starting target RO), the 3rd RO in the 2nd mapping cycle, the 3rd RO in the 3rd mapping cycle and within the 4th mapping cycle The 3rd RO in .
  • SSB_per_RO 8
  • a mapping cycle only contains 1 RO
  • the number of repeated transmissions of PRACH is equal to 8
  • the index number of the first SSB is 1, that is, SSB 1, and the second one associated with SSB 1
  • the available transmission resource is the only one RO in a mapping cycle; then the starting target RO among the multiple target ROs is RO 1021 in the first mapping cycle, and the multiple target ROs 1022 include: 1st mapping cycle ⁇ 8 ROs in the 8th mapping cycle.
  • the first parameter is less than 1.
  • the number of repeated transmissions of the PRACH may not be determined in combination with the value of the second indication information.
  • the number of repeated transmissions of the PRACH is one of the following: equal to the reciprocal of the first parameter; equal to the second preset value.
  • the number of repeated transmissions of the PRACH is equal to the reciprocal of the first parameter.
  • the number of repeated transmissions of the PRACH is equal to the second preset value.
  • the second preset value can be set according to the actual situation, and can be 2, 4, 8, or larger or smaller, which are not exhaustive here.
  • the values of the second preset value and the aforementioned first preset value may be the same or different, and both are within the protection scope of this embodiment.
  • the second preset value needs to be set in advance on both the terminal device and the network device.
  • the administrator may configure the second preset value on the terminal device and the network device respectively; for another example, the network device may determine the second preset value according to the protocol and then send it to the terminal through system broadcast or other information. device, so that the terminal device can obtain and save the second preset value in advance.
  • the number of repeated transmissions of the PRACH is equal to the minimum value of the reciprocal of the first parameter and the second preset value. It should also be noted that in some cases, the terminal device and the network device may also use the maximum value of the reciprocal of the first parameter and the second preset value as the number of repeated transmissions of the PRACH.
  • any one of them can be specified in advance or negotiated between the terminal device and the network device. As long as the terminal device and the network device determine the number of repeated transmissions of the PRACH in the same way, both are within the protection scope of this embodiment.
  • the terminal device and the network device may respectively determine multiple parameters for repeated transmission of the PRACH. Target transport resources.
  • the starting target transmission resource of the above multiple target transmission resources may be: the first available transmission resource associated with the first SSB; wherein the first available transmission resource associated with the first SSB is: the first mapping cycle The first available transmission resource associated with the first SSB.
  • the definition of the first mapping cycle and the definition of the mapping cycle are the same as those in the previous embodiment, and will not be described again.
  • the number of available transmission resources associated with the first SSB may be multiple.
  • One or more available transmission resources associated with the first SSB within a mapping cycle may be determined based on the first parameter and the index number of the first SSB; specifically, when the first parameter is less than 1, based on the The first parameter determines the number of transmission resources associated with an SSB; based on the number of transmission resources associated with an SSB, determines multiple available transmission resources associated with each SSB within a mapping cycle; based on the index number of the first SSB, and a mapping Multiple available transmission resources associated with each SSB in the cycle determine one or more available transmission resources associated with the first SSB.
  • the arrangement of ROs within a mapping cycle is from low frequency to high frequency in the frequency domain and in time order in the time domain. That is, the ROs are arranged from low to high in the frequency domain at the earliest time domain position, and then The frequency domain at the next time domain position arranges RO from low to high, and so on, without going into details.
  • the multiple available transmission resources associated with SSB 2 are the 5th RO to the 8th RO within a mapping cycle, that is, the 4 ROs after the 4 ROs associated with SSB1.
  • the first available RO associated with SSB 2 is: The first available RO associated with SSB 2 within the first mapping cycle 1121.
  • the first available transmission resource among the one or more available transmission resources associated with the first SSB may be used in the first mapping cycle, As the starting target transmission resource.
  • the following two methods may be used to determine the multiple target transmission resources without using the second indication information:
  • the multiple target transmission resources include multiple transmission resources that are continuous within one or more mapping cycles.
  • multiple consecutive transmission resources within the one or more mapping cycles in addition to the aforementioned starting target transmission resource, regardless of whether the multiple transmission resources are associated with the first SSB, can be used to repeat PRACH. transmission.
  • the number of the plurality of target transmission resources is the same as the number of repeated transmissions of the PRACH. Therefore, after the terminal device and the network device respectively determine the initial target transmission resources, they can both determine the number of repeated transmissions of the PRACH according to the number of repeated transmissions of the PRACH. Determine the number of consecutive multiple transmission resources after the initial target transmission resource. Assume that the number of repeated transmissions of PRACH is 8. After the initial target transmission resource is determined, the initial target transmission resource and the subsequent 7 consecutive transmission resources are used as the multiple target transmission resources.
  • SSB_per_RO 1/2
  • a mapping cycle contains 16 ROs
  • the number of repeated transmissions of PRACH is equal to 4
  • the first SSB is SSB1
  • the starting target RO of multiple target ROs can be is: the first available RO associated with SSB1, which is RO 1211 in Figure 12
  • the multiple target ROs 1212 include: within the first mapping cycle, the starting target RO and the following three consecutive ROs.
  • SSB_per_RO 1/4
  • a mapping cycle contains 32 ROs
  • the number of repeated transmissions of PRACH is equal to 8
  • the first SSB is SSB2
  • the starting target RO of multiple target ROs can be is: the first available RO associated with SSB2, which is RO 1221 in Figure 12
  • the multiple target ROs 1222 include: within the first mapping cycle, starting from the starting target RO and the subsequent 7 consecutive ROs.
  • the second way, the plurality of target transmission resources includes: within each mapping cycle in one or more mapping cycles, the second available transmission resource associated with the first SSB.
  • the second available transmission resources associated with the first SSB include: one or more available transmission resources associated with the first SSB.
  • the number of the multiple target transmission resources is the same as the number of repeated transmissions of the aforementioned PRACH, and when the first parameter is less than 1, there are multiple available transmission resources associated with the first SSB in one mapping cycle. Available transmission resources. Therefore, after the terminal device and the network device respectively determine the starting target transmission resource, both can determine the number of second available transmission resources associated with the first SSB after the starting target transmission resource according to the number of repeated transmissions of the PRACH. Assume that the number of repeated transmissions of PRACH is 4. After determining the starting target transmission resource, the starting target transmission resource and the second available transmission associated with the first SSB in one or more consecutive mapping cycles thereafter are resources are used as the multiple target transmission resources.
  • a mapping cycle contains 16 ROs, the number of repeated transmissions of PRACH is equal to 4, the first SSB is SSB1, the first SSB is SSB 1, and SSB 1 is associated
  • the second available transmission resource is the first RO to the second RO within a mapping cycle;
  • the starting target RO of multiple target ROs can be: the first available RO associated with SSB1, which is RO 1311 in Figure 13 ;
  • the multiple target RO 1312 includes: the first transmission resource and the second transmission resource in the first mapping cycle, and the first transmission resource and the second transmission resource in the second mapping cycle.
  • a mapping cycle contains 32 ROs
  • the number of repeated transmissions of PRACH is equal to 8
  • the first SSB is SSB 2
  • the second available transmission resource associated with SSB 2 is The 5th RO ⁇ 8th RO in a mapping cycle
  • the starting target RO among the multiple target ROs is the 5th RO 1321 in the first mapping cycle
  • the multiple target ROs 1322 include: The fifth RO to the eighth RO in the first mapping cycle, and the fifth RO to the eighth RO in the second mapping cycle.
  • the terminal device and the network device may also determine multiple parameters for repeatedly transmitting the PRACH. Target transport resources.
  • the starting target transmission resource of the above multiple target transmission resources may be: the first available transmission resource associated with the first SSB; wherein the first available transmission resource associated with the first SSB is one of the following: the first The first available transmission resource associated with the first SSB within the first mapping cycle; the first available transmission resource in the subset of transmission resources associated with the first SSB within the first mapping cycle; the first available transmission resource within the first mapping cycle Specified transmission resources associated with the first SSB.
  • the definition of the first mapping cycle and the definition of the mapping cycle are the same as those in the previous embodiment, and will not be described again.
  • the second indication information is further combined to determine the first available transmission resource associated with the first SSB, that is, the starting target transmission resource of multiple target transmission resources.
  • the second indication information may be carried by the first DCI; specifically, the second indication information is carried by the second indication information field of the first DCI.
  • the second indication information may specifically be carried by the second indication information field of the first DCI, that is, DCI format (format) 1_0.
  • the second indication information field is field 6 illustrated in Figure 7 of the aforementioned embodiment; the second indication information is specifically PRACH mask (mask) index (index number).
  • the value of the second indication information (ie, PRACH mask index) is used to determine the PRACH resource location of the non-contention-based random access process.
  • PRACH mask index The details can be shown in Table 1:
  • the transmission resource indicated by the index number is related to whether the index number is defined as 0 or 1 as the minimum value; for example, if the index number is 0, it is defined as the minimum value, then the transmission resource with index number 1 can refer to a mapping cycle. For the second transmission resource associated with an SSB, the index number 1 is defined as the minimum value.
  • the transmission resource with the index number 1 can refer to the first transmission resource associated with an SSB within a mapping cycle.
  • the PRACH mask index can be 0, which means that the network equipment only allocates preamble to the terminal device, but the PRACH occasion in the frequency domain still needs to be selected by the UE itself.
  • the above index number can also be replaced by sorting, that is, the transmission resource with index number 1 can be replaced by the transmission resource ranked first, that is, used to indicate the first transmission resource associated with a certain SSB ;
  • transmission resources with even index numbers can be replaced by transmission resources sorted in even digits.
  • a certain SSB is associated with 4 transmission resources, and the transmission resources sorted in even digits are used to indicate the second one associated with the SSB. and the 4th transmission resource.
  • the transmission resource with index number 1 in the above Table 1 can be expressed as "RO index 1" (RO index number 1).
  • the expression method for other transmission resources with index numbers 2 to 8 is similar to the above, and will not be described one by one. .
  • the transmission resources with even index numbers in the above Table 1 can be expressed as "every even RO" (all even ROs); the transmission resources with odd index numbers in the above Table 1 can be expressed as "every odd RO" (all odd ROs).
  • the values of the second indication information may also have other reserved values.
  • the values of the second indication information may also include the values 11 to 15. These values may be reserved values, which are not limited in this embodiment.
  • the value of the second indication information is used to determine a subset of transmission resources associated with the first SSB. Specifically, if the value of the second indication information is within the first value range, it is used to determine multiple available transmission resources in the transmission resource subset associated with the first SSB. That is, the multiple available transmission resources in the transmission resource subset associated with the first SSB are determined based on the value of the second indication information; the value of the second indication information is within the first value range.
  • the aforementioned first value range may be set in advance on the network device and the terminal device, and the first value range may specifically include: 0, 9, and 10.
  • the first available transmission resource associated with the first SSB is: the first available transmission resource in the subset of transmission resources associated with the first SSB within the first mapping cycle.
  • the processing by the network device may include: the network device sends second indication information; if the value of the second indication information is within the first value range, it is used by the terminal device to determine the transmission of the first SSB association Resource subset. That is, the network device may determine in advance which available transmission resources the terminal device uses to transmit, then determine the value of the second indication information, and then send the second indication information to the terminal device. If the network device determines that the terminal device can use all available transmission resources associated with the first SSB as a subset of transmission resources, the value of the second indication information is 0. If the network device determines that the terminal device can use available transmission resources with an even number among all available transmission resources associated with the first SSB, then the value of the second indication information is set to 9.
  • the value of the second indication information is set to 10. It can be seen that the network device may have determined the transmission resource subset associated with the first SSB before sending the second indication information, and may directly add the transmission resource subset associated with the first SSB within the first mapping cycle. The first available transmission resource is used as the first available transmission resource associated with the first SSB.
  • the way for the terminal device to determine the transmission resource subset associated with the first SSB may include: when the value of the second indication information is 0, determine that the transmission resource subset associated with the first SSB is: the first All available transmission resources associated with SSB. When the value of the second indication information is 9, it can be determined that the subset of transmission resources associated with the first SSB is: available transmission resources with an even number among all available transmission resources associated with the first SSB. When the value of the second indication information is 10, it can be determined that the subset of transmission resources associated with the first SSB is: available transmission resources with an odd index number among all available transmission resources associated with the first SSB.
  • the value of the second indication information is within the second value range, it is used to determine the designated transmission resource associated with the first SSB. That is to say, the designated transmission resource associated with the first SSB is determined based on the value of the second indication information; the value of the second indication information is within the second value range.
  • the aforementioned second value range may be set in advance on the network device and the terminal device, and the second value range may specifically include: 1 to 8. For example, when the value of the second indication information is 1, the terminal device and the network device may determine that the designated transmission resource associated with the first SSB is the transmission resource with an index number of 1.
  • the first available transmission resource associated with the first SSB is: a designated transmission resource associated with the first SSB in the first mapping cycle.
  • the processing of the network device may include: the network device sends second indication information; if the value of the second indication information is within the second value range, the terminal device determines the first SSB.
  • the associated specified transport resource That is to say, the network device can know in advance all available transmission resources associated with the first SSB used by the terminal device. If it is necessary to indicate one of them as a designated transmission resource, the corresponding value can be carried in the second indication information. . It can be seen that the network device may have determined the designated transmission resource associated with the first SSB before sending the second indication information, and may directly use the designated transmission resource associated with the first SSB in the first mapping cycle as The first available transmission resource associated with the first SSB.
  • the first available transmission resource associated with the first SSB is: the first available transmission resource associated with the first SSB within the first mapping cycle.
  • the designated transmission resource is determined based on the value of the second indication information; the designated transmission resource is used as a mapping cycle.
  • the end available transmission resource of the first SSB association is the first available transmission resource of the first SSB association within a mapping cycle as the starting available transmission resource. Further, associate the first available transmission resource with the first SSB in the first mapping cycle.
  • the processing of the network device may include: the network device sends second indication information; if the value of the second indication information is within the second value range, the terminal device determines the first SSB.
  • the associated specified transport resource That is to say, the network device can know in advance all available transmission resources associated with the first SSB used by the terminal device. If it is necessary to indicate one of them as a designated transmission resource, the corresponding value can be carried in the second indication information. .
  • the network device may have determined the designated transmission resource associated with the first SSB before sending the second indication information, and may directly use the designated transmission resource associated with the first SSB in the first mapping cycle as The available transmission resources at the end of the first SSB association are used, and the first available transmission resource in the subset of transmission resources associated with the first SSB within the first mapping cycle is used as the first available transmission resource of the first SSB association.
  • both the terminal device and the network device can determine the first available transmission resource associated with the first SSB, which is the starting target transmission resource among the multiple target transmission resources.
  • the following two methods may be used to determine the multiple target transmission resources:
  • the multiple target transmission resources include multiple transmission resources that are continuous within one or more mapping cycles.
  • multiple consecutive transmission resources within the one or more mapping cycles in addition to the aforementioned starting target transmission resource, regardless of whether the multiple transmission resources are associated with the first SSB, can be used to repeat PRACH. transmission.
  • the starting target RO of multiple target ROs can be: the second available RO associated with SSB1 in the first mapping cycle, that is, RO 1411 in Figure 14; the multiple target ROs 1412 include: within the first mapping cycle , starting from the starting target RO and the following two consecutive ROs, as well as the first RO in the second mapping cycle.
  • SSB_per_RO 1/4
  • a mapping cycle contains 32 ROs
  • the number of repeated transmissions of PRACH is equal to 8
  • the first SSB is SSB2
  • the value of the second indication information is 10
  • the starting target RO of multiple target ROs can be: the first available RO 1421 associated with SSB2 in the first mapping cycle
  • the multiple target ROs 1422 include: the starting target RO in the first mapping cycle.
  • the subsequent 7 consecutive ROs are only illustrative and do not exhaust all possible situations.
  • the plurality of target transmission resources includes: within each mapping cycle in one or more mapping cycles, the second available transmission resource associated with the first SSB.
  • the second available transmission resources associated with the first SSB include one of the following: one or more available transmission resources associated with the first SSB; multiple available transmission resources in a subset of the transmission resources associated with the first SSB Transmission resources; the designated transmission resources associated with the first SSB; one or more available transmission resources associated with the first SSB between the starting available transmission resources and the ending available transmission resources; the starting available transmission resources and/or End available transmission resources are designated transmission resources.
  • the second available transmission resources associated with the first SSB are one or more available transmission resources associated with the first SSB, which may refer to all available transmission resources associated with the first SSB. That is to say, although the starting target transmission resource is determined based on the second indication information, the specific second available transmission resource is not determined in combination with the second indication information. All available transmission resources associated with the first SSB after the starting target transmission resource are The transmission resources are all used as the second available transmission resources associated with the first SSB, that is, the target transmission resources.
  • SSB_per_RO 1/4
  • a mapping cycle contains 32 ROs
  • the number of repeated transmissions of PRACH is equal to 8
  • the first SSB is SSB 2
  • the second available transmission resource associated with SSB 2 is the 5th one in a mapping cycle RO to the 8th RO; if it is previously determined that the starting target RO among the multiple target ROs is the 7th RO in the first mapping cycle, then the multiple target ROs include: The seventh RO to the eighth RO, the fifth RO to the eighth RO in the second mapping cycle, and the fifth RO to the sixth RO in the third mapping cycle.
  • the ordering of the multiple ROs can be that the earliest ROs in the time domain are sorted from low to high in frequency, and then the later ROs in the time domain are sorted in order of frequency. Domains are ordered from lowest to highest, and so on.
  • the available ROs associated with each SSB can also be determined in order from low to high according to the index number of the SSB.
  • each SSB association can also be added.
  • the ordering of available ROs For example, the four ROs associated with SSB1 can also be sorted in order from low to high in the time domain and frequency domain.
  • the four ROs associated with SSB1 are called the first RO associated with SSB1 ⁇ the 4 ROs.
  • the first RO associated with SSB1 is the first RO within a mapping cycle; for example, the 4 ROs associated with SSB2 follow the 4 ROs associated with SSB1.
  • the 4 ROs associated with SSB2 can also be separately They are called the first RO to the fourth RO associated with SSB2.
  • the first RO associated with SSB2 is the fifth RO within a mapping cycle. Unless otherwise specified below, the description of the RO within a mapping cycle and the available RO associated with an SSB are the same as the above and will not be repeated.
  • the second available transmission resources associated with the first SSB are a plurality of available transmission resources in a subset of the transmission resources associated with the first SSB. It may refer to determining the starting target transmission resource based on the second indication information, determining the specific second available transmission resource in combination with the second indication information, and collecting a subset of transmission resources associated with the first SSB after the starting target transmission resource. Multiple available transmission resources are used as target transmission resources.
  • SSB_per_RO 1/4
  • a mapping cycle contains 32 ROs, the number of repeated transmissions of PRACH is equal to 8, and the first SSB is SSB 2; if the value of the second indication information is 9, that is, the third SSB associated with SSB 2
  • the second available transmission resource is the 6th RO and the 8th RO within a mapping cycle, and the starting target RO among the multiple target ROs can be determined to be the 6th RO within the first mapping cycle; the plurality of target ROs can be determined to be the 6th RO within the first mapping cycle;
  • the target ROs include: the 6th RO and the 8th RO in the first mapping cycle, the 6th RO and the 8th RO in the second mapping cycle, and the 6th RO in the third mapping cycle. RO and 8th RO, and 6th RO and 8th RO in the fourth mapping cycle.
  • the second available transmission resource associated with the first SSB is the designated transmission resource associated with the first SSB. It may mean that the starting target transmission resource is determined based on the second indication information, and the specific second available transmission resource is determined in combination with the second indication information, and the designated transmission resources associated with the first SSB are all used as target transmission resources.
  • SSB_per_RO 1/4
  • a mapping cycle contains 32 ROs
  • the number of repeated transmissions of PRACH is equal to 4
  • the first SSB is SSB 1
  • the value of the second indication information is 3, that is, the first SSB associated with SSB 1
  • the second available transmission resource is the third RO within a mapping cycle, and the starting target RO among the multiple target ROs can be determined to be the third RO within the first mapping cycle;
  • the multiple target ROs include: That 3rd RO in the first mapping loop, the 3rd RO in the second mapping loop, the 3rd RO in the third mapping loop, and the 3rd RO in the fourth mapping loop.
  • the second available transmission resource associated with the first SSB is one or more available transmission resources associated with the first SSB between the starting available transmission resource and the ending available transmission resource; the starting available transmission resource and/or End available transmission resources are designated transmission resources. This method is applicable when the value of the second indication information is within the second value range.
  • the first available transmission resource associated with the first SSB is: the first available transmission resource associated with the first SSB in the first mapping cycle. That is, when the value of the second indication information is within the second value range, the designated transmission resource is determined based on the value of the second indication information; the designated transmission resource is used as the designated transmission resource within a mapping cycle.
  • the end available transmission resource of the first SSB association is the first available transmission resource of the first SSB association within a mapping cycle as the starting available transmission resource.
  • one of the first SSB association between the starting available transmission resource and the ending available transmission resource of the first SSB association can be or multiple available transmission resources, as the second available transmission resources associated with the aforementioned first SSB.
  • SSB_per_RO 1/4
  • a mapping cycle contains 32 ROs, the number of repeated transmissions of PRACH is equal to 4, the first SSB is SSB 1; if the value of the second indication information is 2, the end of SSB 1 association is available
  • the RO is determined to be the second RO within a mapping cycle, and the first RO associated with SSB1 is used as the starting available RO.
  • the multiple target ROs include: the first RO and the second RO in the first mapping cycle, and the first RO and the second RO in the second mapping cycle.
  • the first available transmission resource associated with the first SSB is: the designated transmission resource associated with the first SSB in the first mapping cycle. That is, when the value of the second indication information is within the second value range, the designated transmission resource is determined based on the value of the second indication information; the designated transmission resource is used as the designated transmission resource within a mapping cycle.
  • the starting available transmission resource associated with the first SSB is the last available transmission resource associated with the first SSB as the ending available transmission resource.
  • the first SSB association between the starting available transmission resource and the ending available transmission resource of the first SSB association may be The available transmission resources are used as the second available transmission resources associated with the aforementioned first SSB.
  • SSB_per_RO 1/4
  • a mapping cycle contains 32 ROs, the number of repeated transmissions of PRACH is equal to 4, the first SSB is SSB 1; if the value of the second indication information is 3, the start of the association of SSB 1
  • the available RO is determined as the third RO within a mapping cycle, and the fourth RO associated with SSB1 is regarded as the end available RO.
  • the multiple target ROs include: the third RO and the fourth RO in the first mapping cycle, and the third RO and the fourth RO in the second mapping cycle.
  • the terminal device and the network device may also determine whether to perform repeated transmission of the PRACH in combination with the first parameter.
  • the terminal device determines to perform repeated transmission of the PRACH when the value of the first indication information is a first specified value, including: the terminal device determines to perform repeated transmission of the PRACH when the value of the first indication information is the first specified value. value and the first parameter is less than 1, it is determined to perform repeated transmission of PRACH.
  • the processing of the network device may be: when the value of the first indication information is the first specified value and the first parameter is less than 1, determine that the terminal device performs repeated transmission of the PRACH. That is to say, both the terminal device and the network device can determine that the terminal device does not perform PRACH when the value of the first indication information is the second specified value and/or the first parameter is not less than 1. Repeat the transfer.
  • the processing that can be performed on the terminal device side is: the terminal device receives the first indication information and determines whether the value of the first indication information is the first specified value; if the first indication information If the value of the first indication information is the second specified value, it is determined not to perform repeated transmission of PRACH; if the value of the first indication information is the first specified value, it is determined whether the first parameter is less than 1; if it is determined that the first parameter is less than 1 , then it is determined to perform repeated transmission of PRACH, otherwise, it is determined not to perform repeated transmission of PRACH.
  • the processing that can be performed on the network device side is: when the network device determines that the terminal device can perform repeated transmission of PRACH, the value of the first indication information is set to the first specified value, and the first indication is The information is sent to the terminal device; otherwise, the network device sets the value of the first indication information to the second specified value and sends the first indication information to the terminal device.
  • the network device sends the first indication information and the value of the first indication information is the first specified value it is determined whether the first parameter is less than 1; if it is determined that the first parameter is less than 1, it is determined that the terminal device executes Repeated transmission of PRACH; otherwise, determine that the terminal device does not perform repeated transmission of PRACH.
  • the terminal device and the network device can be pre-configured.
  • the terminal device and the network device can be pre-configured to determine whether to perform repeated transmission of PRACH based only on the first indication information. Transmission; for another example, the terminal equipment and the network equipment can be pre-configured, and based on the value of the first indication information and the first parameter, they jointly determine whether to perform repeated transmission of the PRACH. It should be understood that if the terminal device and the network device are pre-configured to determine whether to perform repeated transmission of the PRACH based only on the first indication information, the terminal device and the network device can adopt all the above possible implementations for processing.
  • the terminal device and the network device are pre-configured to jointly determine whether to perform repeated transmission of PRACH based on the value of the first indication information and the first parameter, the terminal device and the network device can only use the first parameter less than 1 in the aforementioned embodiment. Possible implementations for related processing.
  • the number of repeated transmissions of the PRACH is determined in combination with the value of the second indication information.
  • the number of repeated transmissions of the PRACH, when the first parameter is less than 1, is equal to the number of first available transmission resources associated with the first SSB in one mapping cycle.
  • the first available transmission resources associated with the first SSB include one of the following: multiple available transmission resources in a subset of transmission resources associated with the first SSB; one or more available transmission resources associated with the first SSB ; Multiple available transmission resources between the starting available transmission resource and the ending available transmission resource associated with the first SSB; the starting available transmission resource and/or the ending available transmission resource are the starting available transmission resources associated with the first SSB Specify transport resources.
  • the subset of transmission resources associated with the first SSB is determined based on the value of the second indication information; the first value is within a first value range.
  • the determination method is the same as the previous embodiment, and will not be repeated here.
  • the method for the terminal device to determine the starting available transmission resources and the ending available transmission resources may include: when the value of the second indication information is within the second value range, based on the first The value of the second indication information determines the designated transmission resource; the designated transmission resource is used as the end available transmission resource of the first SSB association in a mapping cycle, and the first available transmission resource of the first SSB association in a mapping cycle is The transmission resource is used as the starting available transmission resource.
  • the processing of the network device may include: determining the starting available transmission resources and the ending available transmission resources associated with the first SSB of the terminal device within a mapping cycle; and setting the second indication information within the second value range. The value of is set to end available transmission resources, and the second indication information is sent.
  • the method for the terminal device to determine the starting available transmission resources and the ending available transmission resources may include: when the value of the second indication information is within the second value range, based on the first 2.
  • the value of the indication information determines the designated transmission resource; the designated transmission resource is used as the starting available transmission resource associated with the first SSB in a mapping cycle, and the last available transmission resource associated with the first SSB in a mapping cycle is Transport resources serve as end available transport resources.
  • the processing of the network device may include: determining the starting available transmission resources and the ending available transmission resources associated with the first SSB of the terminal device within a mapping cycle; and setting the second indication information within the second value range. The value of is set as the starting available transmission resource, and the second indication information is sent.
  • the second indication information that is, the content of the PRACH mask index
  • the second indication information is designed as a bitmap
  • the bitmap is used to indicate the designated transmission resource.
  • each bit in the bitmap may correspond to a transmission resource, and the value of each bit is used to indicate whether the transmission resource at the corresponding position is a designated transmission resource.
  • the value of a bit is the first value
  • it is used to indicate that the transmission resource at the corresponding location is the designated transmission resource
  • the value of a bit RO is the second value
  • the transport resource for the location is not a designated transport resource.
  • the first value is different from the second value.
  • the first value is 0 and the second value is 1, or the first value is 1 and the second value is 0, or it can also be set to other values. , we will not exhaustively list them here, as long as both the terminal device and the network device adopt the same value meaning.
  • the bitmap can only contain one designated transmission resource.
  • the terminal device and the network device can default the designated transmission resource as the starting available transmission resource or the ending available transmission resource, as long as the network device and the terminal device Using the same analysis method is within the protection scope of this embodiment. Specifically, if based on the second indication information, it is determined that the designated transmission resource is the ending available transmission resource of the first SSB association, then the first available transmission resource of the first SSB association within a mapping cycle is used as the starting transmission resource. Transmission resources are now available. If it is determined based on the second indication information that the specified transmission resource is the starting available transmission resource associated with the first SSB, then the last available transmission resource associated with the first SSB within a mapping cycle is used as the ending available transmission resource. .
  • the bitmap can contain two designated transmission resources.
  • the terminal device and the network device can default to the designated transmission resource located at the front sequence position as the initial available transmission resource, and the designated transmission resource located at the back sequence position.
  • the specified transmission resource is the end available transmission resource, and it is within the protection scope of this embodiment as long as the network device and the terminal device adopt the same resolution method. Specifically, if two designated transmission resources are determined based on the second indication information, the starting available transmission resource and the ending available transmission resource may be determined based on the two designated transmission resources.
  • the first available transmission resources associated with the first SSB can be determined, and then the number of the first available transmission resources associated with the first SSB within a mapping cycle can be directly used as the number of repeated transmissions of the PRACH.
  • the terminal device and the network device may also determine multiple target transmissions for repeated transmission of PRACH. resource.
  • the starting target transmission resource of the plurality of target transmission resources may be: the first available transmission resource associated with the first SSB; wherein the first available transmission resource associated with the first SSB is one of the following: The first available transmission resource associated with the first SSB in one mapping cycle; the first available transmission resource in the subset of transmission resources associated with the first SSB within the first mapping cycle; within the first mapping cycle The designated transmission resource associated with the first SSB.
  • the first available transmission resource associated with the first SSB is determined in combination with the second indication information, that is, the starting target transmission resource of multiple target transmission resources.
  • the definition of the first mapping cycle, the definition of the mapping cycle, the description of the transmission resource subset associated with the first SSB, and the description of the second indication information are the same as in the previous embodiment, and will not be repeated here.
  • the value of the second indication information is within the first value range or the second value range, the method of determining the first available transmission resource associated with the first SSB is also the same as the previous embodiment, and no further Repeat.
  • the second indication information may be redefined indication information for carrying a bitmap; the content and meaning of the bitmap are the same as those in the foregoing embodiments.
  • the second indication information carries a bitmap
  • a method of determining the starting target transmission resource of the plurality of target transmission resources is used.
  • the bitmap may only contain one designated transmission resource, or may contain two designated transmission resources. Based on the one designated transmission resource or the two designated transmission resources, the starting available transmission resource within a mapping cycle is determined. The method of ending the available transmission resources is the same as the previous embodiment and will not be described again.
  • the starting available transmission resource associated with the first SSB in the first mapping cycle may be used as the first available transmission resource associated with the first SSB.
  • the first available transmission resource associated with the first SSB can be used as the starting target transmission resource of multiple target transmission resources.
  • the multiple target transmission resources include multiple consecutive target transmission resources within one or more mapping cycles. transmission resources.
  • multiple consecutive transmission resources within the one or more mapping cycles in addition to the aforementioned starting target transmission resources, can be used regardless of whether the multiple transmission resources are associated with the first SSB used by the terminal device.
  • the plurality of target transmission resources include: the first available transmission resource associated with the first SSB within a mapping cycle. The description of the first available transmission resource associated with the first SSB is the same as the previous embodiment and will not be described again. This method can directly use all the first available transmission resources associated with the first SSB in a mapping cycle after the initial target transmission resources determined in the previous embodiment as the multiple target transmission resources.
  • the terminal device and the network device may determine whether to perform repeated transmission of the PRACH in combination with the first parameter and the second indication information.
  • the terminal device determines to perform repeated transmission of the PRACH when the value of the first indication information is a first specified value, including: the terminal device determines to perform repeated transmission of the PRACH when the value of the first indication information is the first specified value. If the value, the first parameter is less than 1, and the value of the second indication information is within the first value range, it is determined to perform repeated transmission of the PRACH.
  • the processing of the network device may be: when the value of the first indication information is the first specified value, the first parameter is less than 1, and the value of the second indication information is within the first value range. Next, determine that the terminal equipment performs repeated transmission of PRACH.
  • both the terminal device and the network device can satisfy the requirements that the value of the first indication information is the second specified value, the first parameter is not less than 1, and the value of the second indication information is within the second specified value. In the case of any one of the ranges, it is determined that the terminal equipment does not perform repeated transmission of PRACH.
  • Whether the terminal device and the network device combine the values of the first parameter and the second indication information to determine whether to perform repeated transmission of the PRACH may be preconfigured.
  • the terminal equipment and the network equipment can be pre-configured, and whether to perform repeated transmission of the PRACH is determined based only on the first indication information; for another example, the terminal equipment and the network equipment can be pre-configured, based on the value of the first indication information and the first parameter. , jointly determine whether to perform repeated transmission of PRACH.
  • the terminal device and the network device may be pre-configured to jointly determine whether to perform repeated transmission of the PRACH based on the value of the first indication information, the first parameter, and the value of the second indication information.
  • the number of repeated transmissions of the PRACH only needs to be determined when the value of the second indication information is within the first value range.
  • the number of repeated transmissions of the PRACH, when the first parameter is less than 1, is equal to the number of first available transmission resources associated with the first SSB in one mapping cycle.
  • the first available transmission resources associated with the first SSB include: multiple available transmission resources in a subset of the transmission resources associated with the first SSB. Wherein, the subset of transmission resources associated with the first SSB is determined based on the value of the second indication information; the first value is within a first value range.
  • the determination method is the same as the previous embodiment, and will not be repeated here.
  • the first available transmission resources associated with the first SSB can be determined, and then the number of the first available transmission resources associated with the first SSB within a mapping cycle can be directly used as the number of repeated transmissions of the PRACH.
  • the terminal device and the network device may respectively determine multiple target transmission resources for repeated transmission of PRACH.
  • the starting target transmission resource of the plurality of target transmission resources may be: the first available transmission resource associated with the first SSB; wherein the first available transmission resource associated with the first SSB is: the first mapping The first available transmission resource in the subset of transmission resources associated with the first SSB within the cycle.
  • the first available transmission resource associated with the first SSB is determined based on the second indication information, that is, the starting point of the multiple target transmission resources.
  • the original target transmission resource The specific determination method is the same as the previous embodiment, and will not be repeated here.
  • the following two methods can be used to determine the multiple target transmission resources: the first method, the multiple target transmission resources include multiple consecutive target transmission resources within one or more mapping cycles. transmission resources. The details are the same as those in the previous embodiments, and repeated descriptions will not be made.
  • the plurality of target transmission resources include: the first available transmission resource associated with the first SSB within a mapping cycle. The description of the first available transmission resource associated with the first SSB is the same as the previous embodiment and will not be described again. This method can directly use all the first available transmission resources associated with the first SSB in a mapping cycle after the initial target transmission resources determined in the previous embodiment as the multiple target transmission resources.
  • the number of repeated transmissions of PRACH may be indicated by the network device.
  • the processing that the network device can perform includes: the network device sends third indication information, the third indication information carries a first value, and the first value is used to determine the number of repeated transmissions of the PRACH.
  • the processing that the terminal device can perform may include: the terminal device receives third indication information, the third indication information carries a first value, and the first value is used to determine the number of repeated transmissions of the PRACH.
  • the first numerical value may be a positive integer.
  • the number of repeated transmissions of the PRACH is one of the following: equal to the first value; equal to the product of the first value and the second value.
  • the second numerical value may be a positive integer. It should be noted that whether the number of repeated transmissions of the PRACH is equal to the first value or the product of the first value and the second value can be pre-configured or pre-negotiated for the network device and the terminal device, as long as both parties use the same The method can be used to determine the number of repeated transmissions of PRACH.
  • the second value may be preset, configured for the network device, or related to the first parameter; wherein the first parameter is used to represent the number of synchronization signal blocks SSB associated with one transmission resource.
  • the second value is preset, which may mean that the terminal device and the network device respectively preset the second value.
  • the second value is configured by the network device, and the network device may send the second value to the terminal device.
  • the second value may be carried by a system message or may be carried by other information, which is not limited here.
  • the second numerical value is related to the first parameter, it is one of the following: when the first parameter is less than 1, it is equal to the reciprocal of the first parameter; when the first parameter is not less than In the case of 1, it is equal to 1; in the case of the first parameter is not less than 1, it is equal to the first parameter; in the case of the first parameter is less than 1, it is equal to the first SSB associated in a mapping cycle The second amount of available transmission resources.
  • the second numerical value is equal to the reciprocal of the first parameter when the first parameter is less than 1, and is equal to 1 when the first parameter is not less than 1. In the above two cases, it can be It is understood as the number of available transmission resources associated with the first SSB within a mapping cycle.
  • the description of the second available transmission resource associated with the first SSB is the same as the previous embodiment and will not be repeated.
  • the third indication information is carried by one of the following: DCI or RRC signaling.
  • the third indication information is carried by the first DCI.
  • the description of the first DCI will not be repeated here.
  • the third indication information can use the first DCI, that is, field 6 in DCI format 1_0, that is, redefine the original PRACH mask index in Field 6, and directly carry the aforementioned first value in the PRACH mask index, so that Its value is used to indicate the number of repeated transmissions of PRACH.
  • the third indication information is carried by the first DCI, but a specified number of bits among the remaining reserved bits of the first DCI are used as the third indication information.
  • field 6 in DCI format 1_0 keeps the PRACH mask index specified in the original protocol unchanged.
  • the third indication information is carried by a second DCI. The definition of the second DCI is the same as that in the previous embodiment, and will not be described again. At this time, if the second DCI is used to carry the first indication information, it is further limited that the third indication information and the first indication information occupy different bits.
  • the third indication information is signaled by RRC. At this time, if the RRC signaling is used to carry the first indication information, it is further limited that the third indication information and the first indication information occupy different bits.
  • the foregoing examples provide a variety of possible carrying methods that can be used for the third indication information.
  • the different carrying methods of the foregoing third indication information can be divided into two situations.
  • the first case is the first DCI, that is, Field in DCI format 1_0.
  • the original PRACH mask index of 6 is redefined.
  • the second case is the case where the original PRACH mask index of Field 6 in the first DCI, DCI format 1_0, is not redefined.
  • the following is a description of the methods of determining multiple target transmission resources based on the above two different situations:
  • the original PRACH mask index is redefined.
  • the starting target transmission resource of multiple target transmission resources may be: the first available transmission resource associated with the first SSB; wherein the first available transmission resource associated with the first SSB is: within the first mapping cycle The first available transmission resource associated with the first SSB.
  • the first available transmission resource associated with the first SSB is: the only available transmission resource associated with the first SSB in the first mapping cycle. If the first parameter is less than 1, then the first available transmission resource associated with the first SSB is: the first available transmission resource associated with the first SSB within the first mapping cycle.
  • the plurality of target transmission resources may include: a plurality of consecutive transmission resources within one or more mapping cycles. Multiple consecutive transmission resources within the one or more mapping cycles, in addition to the aforementioned starting target transmission resource, can be used for repeated transmission of PRACH regardless of whether the multiple transmission resources are associated with the first SSB. In this case, no matter whether the number of repeated transmissions of the aforementioned PRACH is equal to the first value, or it can also be equal to the product of the first value and the second value, and no matter what the specific value of the second value is, the terminal device can be considered to be in a Or within each mapping cycle of multiple mapping cycles, repeated transmission is performed on multiple consecutive transmission resources starting from the initial target transmission resource.
  • the multiple target transmission resources are similar to the aforementioned Figure 9 and its related description; when the first parameter is less than 1, the multiple target transmission resources It is also similar to the aforementioned Figure 12 and its related description, so the description will not be repeated here.
  • the plurality of target transmission resources include: second available transmission resources associated with the first SSB within each mapping cycle in one or more mapping cycles.
  • the second available transmission resources associated with the first SSB include one of the following: one or more available transmission resources associated with the first SSB.
  • a mapping cycle contains 4 ROs
  • the first value is 4, that is, the number of repeated transmissions of PRACH is equal to 4
  • the index number of the first SSB is 5, which is SSB 5.
  • the second available transmission resource associated with SSB 5 can be the third RO within a mapping cycle; then the starting target RO among the multiple target ROs is the third RO within the first mapping cycle 1011, and the multiple targets RO 1012, including: starting from the starting target RO in the first mapping cycle (including the starting target RO), the 3rd RO in the 2nd mapping cycle, the 3rd RO in the 3rd mapping cycle And the 3rd RO in the 4th mapping loop. I won’t be exhaustive here.
  • the first parameter is less than 1 and the PRACH mask index is redefined, regardless of the number of repeated transmissions of the aforementioned PRACH, it is equal to the first value, or it can also be equal to the product of the first value and the second value, and regardless of whether the second value is specifically Either value can be considered to be repeated transmission on all available transmission resources associated with the first SSB in each mapping cycle of one or more mapping cycles.
  • a mapping cycle contains 16 ROs
  • the number of repeated transmissions of PRACH can be equal to the first value, assuming that the first value is equal to 4, then the number of repeated transmissions of PRACH is 4;
  • the first SSB is SSB1
  • the first SSB is SSB 1
  • the second available transmission resource associated with SSB 1 is the first RO to the second RO within a mapping cycle;
  • the starting target RO of multiple target ROs It can be: the first available RO associated with SSB1, that is, RO 1311 in Figure 13;
  • the multiple target ROs 1312 include: the first transmission resource and the second transmission resource in the first mapping cycle, the second The first transmission resource and the second transmission resource in a mapping cycle. This is not an exhaustive list of all possible situations.
  • the original PRACH mask index is not reset.
  • the starting target transmission resource of multiple target transmission resources may be: the first available transmission resource associated with the first SSB; wherein the first available transmission resource associated with the first SSB is one of the following: the first The first available transmission resource associated with the first SSB in the mapping cycle; the first available transmission resource in the subset of transmission resources associated with the first SSB within the first mapping cycle; the first available transmission resource within the first mapping cycle The designated transmission resource associated with the first SSB.
  • the first available transmission resource associated with the first SSB can be the same as the previous embodiment, which is: the first available transmission resource in the first mapping cycle The only available transmission resource associated with SSB. If the first parameter is less than 1, PRACH mask index can be used at this time, and the first available transmission resource associated with the first SSB is: the first transmission resource subset associated with the first SSB in the first mapping cycle. An available transmission resource; the designated transmission resource associated with the first SSB in the first mapping cycle.
  • the method for determining the transmission resource subset associated with the first SSB based on the second indication information provided in the previous embodiment is the same, and will not be performed. Repeat the description; after determining the transmission resource subset associated with the first SSB, the first available transmission resource in the transmission resource subset associated with the first SSB in the first mapping cycle can be directly used as a multiplex The starting target transport resource for each target transport resource.
  • the method for determining the designated transmission resource associated with the first SSB in combination with the PRACH mask index is the same, and the description will not be repeated.
  • the specified transmission resource can be directly used as the starting target transmission resource of multiple target transmission resources.
  • the plurality of target transmission resources may include: a plurality of consecutive transmission resources within one or more mapping cycles. Multiple consecutive transmission resources within the one or more mapping cycles, in addition to the aforementioned starting target transmission resource, can be used for repeated transmission of PRACH regardless of whether the multiple transmission resources are associated with the first SSB.
  • the details are the same as the previous embodiments and will not be described again.
  • the plurality of target transmission resources include: second available transmission resources associated with the first SSB within each mapping cycle in one or more mapping cycles.
  • the second available transmission resources associated with the first SSB include one of the following: one or more available transmission resources associated with the first SSB; multiple available transmission resources in a subset of the transmission resources associated with the first SSB Transmission resources; the designated transmission resources associated with the first SSB; one or more available transmission resources associated with the first SSB between the starting available transmission resources and the ending available transmission resources; the starting available transmission resources and/or End available transmission resources are designated transmission resources.
  • the second available transmission resources associated with the first SSB include: one or more available transmission resources associated with the first SSB.
  • the second available transmission resources associated with the first SSB include one of the following: multiple available transmission resources in the subset of transmission resources associated with the first SSB ; The specified transmission resource associated with the first SSB; one or more available transmission resources associated with the first SSB between the starting available transmission resource and the ending available transmission resource; the starting available transmission resource and/or ending available transmission resource
  • the transmission resource is the specified transmission resource.
  • the method of determining the second available transmission resource associated with the first SSB is the same as the first parameter is less than 1 and is combined with the value of the second indication information in the aforementioned embodiment to determine the second available transmission resource.
  • the two methods of available transmission resources are basically the same and will not be repeatedly explained.
  • the second available transmission resource associated with the first SSB is still One or more available transmission resources associated with the first SSB may be included. The specific determination method has been described in detail in the foregoing embodiments and will not be repeated here.
  • the network device may implicitly instruct the terminal device whether to perform repeated transmission of the PRACH through the first indication information.
  • the length of the first indication information may be multiple bits, and the specific number of bits may be set according to the actual situation, which is not limited in this embodiment.
  • the way for the network device side to instruct the terminal device whether to perform repeated transmission of PRACH may be to instruct the terminal device to perform repeated transmission of PRACH when the value of the first indication information is not the third designated value; and /Or, when the value of the first indication information is a third specified value, it is used to instruct the terminal equipment not to perform repeated transmission of PRACH.
  • the method for the terminal device to determine whether to perform repeated transmission of PRACH based on the first indication information may specifically include: the terminal device determines whether to perform repeated transmission of the PRACH when the value of the first indication information is not a third specified value. , determine to perform repeated transmission of PRACH; and/or, the terminal equipment determines not to perform repeated transmission of PRACH when the value of the first indication information is a third designated value.
  • the third specified value can be set according to the actual situation. For example, it may include 0 in some cases, and it may include 0 and 1 in some cases.
  • the value of the first indication information is used to determine the number of repeated transmissions of the PRACH. That is, according to the first indication information of the implicit indication, it can be determined whether the terminal equipment performs repeated transmission of PRACH; when it can be determined according to the first indication information of the implicit indication that the repeated transmission of PRACH is performed, the network device can directly set The value of the first indication information is used to determine the number of repeated transmissions of the PRACH. Correspondingly, when the terminal device determines to perform repeated transmission of the PRACH based on the first indication information, the terminal device directly determines the number of repeated transmissions of the PRACH based on the value of the first indication information.
  • this embodiment uses some values that are not used to determine the number of repeated transmissions of PRACH as the third indication value.
  • Both the network device and the terminal device can determine the specific value of the third indication value in advance; then the terminal device When it is determined that the value of the first indication information is not the foregoing third indication value, that is, the value of the first indication information can be used to determine the number of repeated transmissions of the PRACH.
  • the number of repeated transmissions of the PRACH is one of the following: equal to the value of the first indication information; equal to the product of the value of the first indication information and the second value.
  • the second numerical value may be a positive integer.
  • the second value may be preset, or configured for the network device, or related to the first parameter; wherein the first parameter is used to represent the number of synchronization signal blocks SSB associated with one transmission resource.
  • the specific description of the second numerical value is the same as that of the previous embodiment, and therefore will not be described again.
  • Whether the number of repeated transmissions of the PRACH is equal to the value of the first indication information or equal to the product of the value of the first indication information and the second value can be pre-configured or pre-negotiated by the network device and the terminal device, as long as Both parties can use the same method to determine the number of repeated transmissions of PRACH.
  • the aforementioned third specified value includes 0 and 1, or only 0, may be related to the way in which the network equipment and the terminal equipment are pre-configured or pre-negotiated to determine the number of repeated transmissions of the PRACH. If the network equipment and the terminal equipment are pre-configured or negotiated in advance, and both parties determine that the number of repeated transmissions of PRACH is equal to the value of the first indication information, then in this case, only when the value of the first indication information is greater than 1 time, it can be guaranteed that the number of repeated transmissions of the PRACH is greater than 1, so the aforementioned third specified value can be set to include 0 and 1.
  • the aforementioned third specified value can be Including 0 and 1, or only 0, related to the second value pre-configured by both parties. For example, in this case where the second value is preset or configured for the network device, if the second value is equal to 1, repeated transmission of the PRACH can only be guaranteed when the value of the first indication information is greater than 1.
  • the number of times is greater than 1, so the aforementioned third specified value can be set to include 0 and 1; if the second value is greater than 1, as long as the value of the first indication information is not 0, it can be guaranteed that the number of repeated transmissions of the PRACH is greater than 1, and it can be set
  • the third specified value may include 0.
  • the second numerical value is related to the first parameter. It is assumed that when the first parameter is less than 1, the second numerical value is equal to the reciprocal of the first parameter. In this case, as long as the value of the first indication information If it is not 0, it can be ensured that the number of repeated transmissions of the PRACH is greater than 1, and the third specified value can be set to include 0. Assume that when the first parameter is not less than 1, the second value is equal to 1. At this time, only when the value of the first indication information is greater than 1, can it be guaranteed that the number of repeated transmissions of the PRACH is greater than 1, so it can Set the aforementioned third specified value to include 0 and 1.
  • the second value is equal to the first parameter, or if the first parameter is less than 1, the second value is equal to the first SSB associated within a mapping cycle.
  • the number of second available transmission resources In the above two cases, there is no guarantee that the second number is greater than 1. Therefore, it is necessary to ensure that the value of the first indication information is greater than 1 to ensure that the number of repeated transmissions of the PRACH is greater than 1.
  • the value of the first indication information is directly used to indicate the number of repeated transmissions of PRACH, even if the first DCI is used to transmit the first indication information, the original PRACH mask index in the first DCI can remain the original Definitions in the Agreement.
  • the starting target transmission resource of multiple target transmission resources may be: the first available transmission resource associated with the first SSB; wherein the first available transmission resource associated with the first SSB is one of the following: the first The first available transmission resource associated with the first SSB in the mapping cycle; the first available transmission resource in the subset of transmission resources associated with the first SSB within the first mapping cycle; the first available transmission resource within the first mapping cycle The designated transmission resource associated with the first SSB.
  • the first available transmission resource associated with the first SSB may be the same as the previous embodiment, which is: the only available transmission resource associated with the first SSB within the first mapping cycle. Transport resources. No repeated explanation will be given here.
  • the first available transmission resource associated with the first SSB is: the transmission resource sub-section associated with the first SSB in the first mapping cycle The first available transmission resource in the set; the designated transmission resource associated with the first SSB in the first mapping cycle.
  • the method for determining the transmission resource subset associated with the first SSB based on the second indication information provided in the previous embodiment is the same. The description will not be repeated; but after determining the transmission resource subset associated with the first SSB, the first available transmission resource in the transmission resource subset associated with the first SSB in the first mapping cycle can be Directly serves as the starting target transmission resource for multiple target transmission resources.
  • the method for determining the designated transmission resource associated with the first SSB based on the second indication information provided in the previous embodiment is the same, and the description will not be repeated.
  • the specified transmission resource can be directly used as the starting target transmission resource of multiple target transmission resources.
  • the first available transmission resource associated with the first SSB is: the first transmission resource associated with the first SSB in the first mapping cycle available transmission resources.
  • the specific processing method is the same as the aforementioned description of determining the first available transmission resource when the first parameter is less than 1 and is not combined with the value of the second indication information, and will not be described again.
  • the plurality of target transmission resources may include: a plurality of consecutive transmission resources within one or more mapping cycles. Multiple consecutive transmission resources within the one or more mapping cycles, in addition to the aforementioned starting target transmission resource, can be used for repeated transmission of PRACH regardless of whether the multiple transmission resources are associated with the first SSB.
  • the details are the same as the previous embodiments and will not be described again.
  • the plurality of target transmission resources include: second available transmission resources associated with the first SSB within each mapping cycle in one or more mapping cycles.
  • the second available transmission resources associated with the first SSB include one of the following: one or more available transmission resources associated with the first SSB; multiple available transmission resources in a subset of the transmission resources associated with the first SSB Transmission resources; the designated transmission resources associated with the first SSB; one or more available transmission resources associated with the first SSB between the starting available transmission resources and the ending available transmission resources; the starting available transmission resources and/or End available transmission resources are designated transmission resources.
  • the method of determining the second available transmission resource associated with the first SSB is the same as the processing method in the previous embodiment in which the first parameter is less than 1 and is combined with the second indication information.
  • the first parameter is less than 1 and is not combined with the second indication information.
  • the processing method of the indication information and the specific description of the processing method if the first parameter is not less than 1 are all the same, so repeated descriptions will not be made.
  • the network device may use the first indication information to implicitly indicate whether the terminal device performs repeated transmission of PRACH, and may use the value of the first indication information to indicate the end of the target transmission resource.
  • the value of the first indication information may be the index number of the end target transmission resource.
  • the value of the first indication information may at least be different from 0.
  • the aforementioned third specified value can be configured as 0.
  • the value range of the first indication information can be configured according to the actual situation.
  • the network device can know in advance the first SSB used by the terminal device, and can also know the available transmission resources associated with the first SSB. If the network device does not expect the terminal device to use the transmission resources of other SSBs of other devices, Then the value range of the first indication information can be controlled to be less than or equal to the maximum index number of the available transmission resources that the first SSB can be associated with in a mapping cycle, and greater than the minimum index of the available transmission resources that the first SSB can be associated with. Number.
  • the first indication can be 1 (may not include 1) to 4 (including 4).
  • the network device can know in advance the total number of transmission resources included in a mapping cycle. If the network device does not expect the terminal device to use multiple mapping cycles for repeated transmission of PRACH, the network device can control the first indication information.
  • the value range is less than or equal to the maximum index number in a mapping cycle and greater than the minimum index number of available transmission resources that the first SSB can be associated with. Assuming that the first parameter is 1/4 and there are 8 SSBs in the system, a mapping cycle can include 32 ROs; assuming that the first SSB is SSB 2, the minimum index number of available transmission resources that can be associated with it is 5. It is determined that the value range of the first indication information includes 5 (excluding 5) and 32.
  • the network device can know in advance the total number of transmission resources included in a mapping cycle. If the network device allows the terminal device to use multiple mapping cycles for repeated transmission of PRACH, the network device can configure the acquisition of the first indication information.
  • the value range is greater than the smallest index number of available transmission resources that the first SSB can be associated with in the first mapping cycle. Assuming that the first parameter is 2 and there are 8 SSBs in the system, a mapping cycle can include 4 ROs; assuming that the first SSB is SSB 3, the minimum index number of the available transmission resources that can be associated with it is 2. This can be determined
  • the value range of the first indication information is greater than 2. Assume that the value of the first indication information at this time is 6, then the end target RO is the second RO in the second mapping cycle.
  • the plurality of target transmission resources may include: a plurality of consecutive transmission resources between the starting target transmission resource and the end target transmission resource. In this case, regardless of whether the starting target transmission resource to the end target transmission resource is the transmission resource associated with the first SSB used by the terminal device, it can be used as the multiple target transmission resources for the terminal device to perform Repeated transmission of PRACH.
  • the plurality of target transmission resources include: multiple available transmission resources of the first SSB association between the starting target transmission resource and the end target transmission resource.
  • the transmission resource indicated by the value of the first indication information is not an available transmission resource associated with the first SSB
  • the last available transmission resource associated with the first SSB before the end target transmission resource can be used as End the target transfer resource.
  • the transmission resources indicated in the first indication information are the available transmission resources associated with the first SSB.
  • only the available transmission resources associated with the first SSB can be used as the multiple target transmission resources for the terminal device to repeat PRACH. transmission.
  • the starting target transmission resource of the plurality of target transmission resources is the first available transmission resource associated with the first SSB; wherein the first available transmission resource associated with the first SSB is one of the following : the first available transmission resource associated with the first SSB in the first mapping cycle; the first available transmission resource in the subset of transmission resources associated with the first SSB within the first mapping cycle; the first mapping The specified transmission resource associated with the first SSB in the loop.
  • the subset of transmission resources associated with the first SSB may be determined based on the value of the second indication information when the first parameter is less than 1, and the value of the second indication information is within the first value. within the range.
  • the first available transmission resource associated with the first SSB is the first available transmission resource in the subset of transmission resources associated with the first SSB within the first mapping cycle.
  • the description of the second indication information and the description of the transmission resource subset associated with the first SSB are the same as the previous embodiments and will not be described again.
  • the designated transmission resource associated with the first SSB may be determined based on the value of the second indication information when the first parameter is less than 1, and the value of the second indication information is within the second value range.
  • the first available transmission resource associated with the first SSB is the designated transmission resource associated with the first SSB within the first mapping cycle.
  • the description of the second indication information and the description of the designated transmission resource associated with the first SSB are the same as the previous embodiments and will not be described again.
  • the first available transmission resource associated with the first SSB is the first available transmission resource associated with the first SSB within the first mapping cycle; in this case , since the first parameter is not less than 1, a mapping cycle may only include the only available transmission resource associated with the first SSB, and the only available transmission resource is the first available transmission resource associated with the first SSB.
  • the value of the second indication information can be redefined so that the value of the second indication information is only used to indicate the index number of a specified transmission resource.
  • the terminal device can directly determine the index number of a designated transmission resource based on the value of the second indication information, and use the designated transmission resource as the starting target transmission resource.
  • the terminal device can be instructed whether to perform repeated transmission of PRACH.
  • the terminal device can be added with the function of enabling repeated transmission of PRACH, and then perform repeated transmission of PRACH based on instructions from the network device when necessary.
  • the terminal equipment can support repeated transmission of PRACH, thereby ensuring that the coverage of PRACH is enhanced when PRACH is repeatedly transmitted.
  • FIG. 15 is a schematic block diagram of a terminal device according to an embodiment of the present application.
  • the terminal equipment may include:
  • the first communication unit 1501 is configured to receive first indication information; the first indication information is used to indicate whether to perform repeated transmission of the physical random access channel PRACH.
  • the terminal equipment further includes: a first processing unit 1502, configured to perform repeated transmission of PRACH on multiple target transmission resources when it is determined to perform repeated transmission of PRACH based on the first indication information; wherein, the Each of the multiple target transmission resources is used for one PRACH transmission.
  • a first processing unit 1502 configured to perform repeated transmission of PRACH on multiple target transmission resources when it is determined to perform repeated transmission of PRACH based on the first indication information; wherein, the Each of the multiple target transmission resources is used for one PRACH transmission.
  • the first processing unit 1502 is configured to determine to perform repeated transmission of PRACH when the value of the first indication information is a first specified value; and/or, when the value of the first indication information is If it is the second specified value, it is determined not to perform repeated transmission of PRACH.
  • the number of repeated transmissions of the PRACH is related to a first parameter, where the first parameter is used to represent the number of SSBs associated with one transmission resource.
  • the number of repeated transmissions of the PRACH is one of the following: equal to the first parameter; equal to the first preset value.
  • the first processing unit 1502 is configured to determine to perform repeated transmission of the PRACH when the value of the first indication information is a first specified value and the first parameter is less than 1.
  • the number of repeated transmissions of the PRACH is one of the following: equal to the reciprocal of the first parameter; equal to the second preset value.
  • the number of repeated transmissions of the PRACH is equal to the minimum value of the reciprocal of the first parameter and the second preset value.
  • the number of repeated transmissions of the PRACH is equal to the number of first available transmission resources associated with the first SSB in one mapping cycle.
  • the first processing unit is configured to: when the value of the first indication information is a first specified value, the first parameter is less than 1, and the value of the second indication information is within the first value range , determine to perform repeated transmission of PRACH.
  • the first available transmission resources associated with the first SSB include: multiple available transmission resources in a subset of the transmission resources associated with the first SSB.
  • the first available transmission resources associated with the first SSB include one of the following: one or more available transmission resources associated with the first SSB; the starting available transmission resources to the ending available transmission resources associated with the first SSB multiple available transmission resources; wherein, the starting available transmission resource and/or the ending available transmission resource are designated transmission resources associated with the first SSB.
  • the first communication unit 1501 is configured to receive third indication information, where the third indication information carries a first numerical value, and the first numerical value is used to determine the number of repeated transmissions of the PRACH.
  • the number of repeated transmissions of the PRACH is one of the following: equal to the first value; equal to the product of the first value and the second value.
  • the first processing unit 1502 is used to determine to perform repeated transmission of PRACH when the value of the first indication information is not a third specified value; and/or, when the value of the first indication information is not the third specified value, If it is the third specified value, it is determined not to perform repeated transmission of PRACH.
  • the value of the first indication information is used to determine the number of repeated transmissions of the PRACH.
  • the number of repeated transmissions of the PRACH is one of the following: equal to the value of the first indication information; equal to the product of the value of the first indication information and the second value.
  • the second value is preset, or configured for the network device, or is related to the first parameter; wherein the first parameter is used to represent the number of synchronization signal blocks SSB associated with one transmission resource.
  • the second numerical value is related to the first parameter, it is one of the following: when the first parameter is less than 1, it is equal to the reciprocal of the first parameter; when the first parameter is not less than In the case of 1, it is equal to 1; in the case of the first parameter is not less than 1, it is equal to the first parameter; in the case of the first parameter is less than 1, it is equal to the first SSB associated in a mapping cycle The second amount of available transmission resources.
  • the multiple target transmission resources include: multiple consecutive transmission resources within one or more mapping cycles.
  • the plurality of target transmission resources include: the first available transmission resource associated with the first SSB within a mapping cycle.
  • the plurality of target transmission resources include: second available transmission resources associated with the first SSB in each mapping cycle of one or more mapping cycles.
  • the second available transmission resources associated with the first SSB include one of the following: one or more available transmission resources associated with the first SSB; multiple available transmission resources in a subset of transmission resources associated with the first SSB ; The specified transmission resource associated with the first SSB; one or more available transmission resources between the starting available transmission resource and the end available transmission resource associated with the first SSB; wherein, the starting available transmission resource and/or End available transmission resources, which are designated transmission resources associated with the first SSB.
  • the value of the first indication information is the index number of the end target transmission resource.
  • the plurality of target transmission resources include: a plurality of consecutive transmission resources between the starting target transmission resource and the end target transmission resource.
  • the plurality of target transmission resources include: a plurality of available transmission resources associated with the first SSB between the starting target transmission resource and the end target transmission resource.
  • the starting target transmission resource among the plurality of target transmission resources is the first available transmission resource associated with the first SSB; wherein the first available transmission resource associated with the first SSB is one of the following: first The first available transmission resource associated with the first SSB within the first mapping cycle; the first available transmission resource in the subset of transmission resources associated with the first SSB within the first mapping cycle; the first available transmission resource within the first mapping cycle Specified transmission resources associated with the first SSB.
  • the value of the second indication information is within the first value range, it is used to determine a subset of transmission resources associated with the first SSB.
  • the value of the second indication information is within the second value range, it is used to determine the designated transmission resource associated with the first SSB.
  • the mapping cycle includes: transmission resources mapped by multiple SSBs; the multiple SSBs include the first SSB.
  • the first SSB is the SSB used by the terminal device, and the first SSB is determined based on fourth indication information, and the fourth indication information is carried by the first DCI.
  • the transmission resource is a PRACH opportunity.
  • the second indication information is carried by the first DCI.
  • the third indication information is carried by one of the following: downlink control information DCI or radio resource control RRC signaling.
  • the third indication information is carried by the first DCI.
  • the first indication information is carried by one of the following: downlink control information DCI or radio resource control RRC signaling.
  • the first indication information is carried in the first DCI.
  • the format of the first DCI is DCI format 1_0.
  • the terminal device in the embodiment of the present application can implement the corresponding functions of the terminal device in the foregoing method embodiment.
  • each module (sub-module, unit or component, etc.) in the terminal device please refer to the corresponding description in the above method embodiment, and will not be described again here.
  • the functions described for each module (sub-module, unit or component, etc.) in the terminal device of the application embodiment can be implemented by different modules (sub-module, unit or component, etc.), or can be implemented by the same module. (Submodule, unit or component, etc.) implementation.
  • FIG 16 is a schematic block diagram of a network device according to an embodiment of the present application.
  • This network equipment can include:
  • the second communication unit 1601 is configured to send first indication information; the first indication information is used to instruct the terminal device whether to perform repeated transmission of the physical random access channel PRACH.
  • the network device further includes: a second processing unit 1602, configured to receive the repeatedly transmitted PRACH on multiple target transmission resources when the first indication information is used to instruct the terminal device to perform repeated transmission of PRACH; Wherein, each target transmission resource among the plurality of target transmission resources is used for one PRACH transmission.
  • the value of the first indication information is a first specified value, it is used to instruct the terminal equipment to perform repeated transmission of PRACH; and/or, the value of the first indication information is a second specified value. In this case, it is used to instruct the terminal equipment not to perform repeated transmission of PRACH.
  • the number of repeated transmissions of the PRACH is related to a first parameter, where the first parameter is used to represent the number of SSBs associated with one transmission resource.
  • the number of repeated transmissions of the PRACH is one of the following: equal to the first parameter; equal to the first preset value.
  • the second processing unit 1602 is configured to determine that the terminal equipment performs repeated transmission of PRACH when the value of the first indication information is a first specified value and the first parameter is less than 1.
  • the number of repeated transmissions of the PRACH is one of the following: equal to the reciprocal of the first parameter; equal to the second preset value.
  • the number of repeated transmissions of the PRACH is equal to the minimum value of the reciprocal of the first parameter and the second preset value.
  • the number of repeated transmissions of the PRACH is equal to the number of first available transmission resources associated with the first SSB in one mapping cycle.
  • the second processing unit is configured to: when the value of the first indication information is a first specified value, the first parameter is less than 1, and the value of the second indication information is within the first value range , determining that the terminal equipment performs repeated transmission of PRACH.
  • the first available transmission resources associated with the first SSB include: multiple available transmission resources in a subset of the transmission resources associated with the first SSB.
  • the first available transmission resources associated with the first SSB include one of the following: one or more available transmission resources associated with the first SSB; the starting available transmission resources to the ending available transmission resources associated with the first SSB multiple available transmission resources; wherein, the starting available transmission resource and/or the ending available transmission resource are designated transmission resources associated with the first SSB.
  • the second communication unit is configured to send third indication information, where the third indication information carries a first value, and the first value is used by the terminal device to determine the number of repeated transmissions of the PRACH.
  • the number of repeated transmissions of the PRACH is one of the following: equal to the first value; equal to the product of the first value and the second value.
  • the value of the first indication information is not the third specified value, it is used to instruct the terminal equipment to perform repeated transmission of PRACH; and/or, when the value of the first indication information is the third specified value In the case of a value, it is used to instruct the terminal equipment not to perform repeated transmission of PRACH.
  • the value of the first indication information is used by the terminal equipment to determine the number of repeated transmissions of the PRACH.
  • the number of repeated transmissions of the PRACH is one of the following: equal to the value of the first indication information; equal to the product of the value of the first indication information and the second value.
  • the second value is preset, or is configured by the network device for the terminal device, or is related to the first parameter; wherein the first parameter is used to represent the number of synchronization signal blocks SSB associated with a transmission resource.
  • the second numerical value is related to the first parameter, it is one of the following: when the first parameter is less than 1, it is equal to the reciprocal of the first parameter; when the first parameter is not less than In the case of 1, it is equal to 1; in the case of the first parameter is not less than 1, it is equal to the first parameter; in the case of the first parameter is less than 1, it is equal to the first SSB associated in a mapping cycle The second amount of available transmission resources.
  • the multiple target transmission resources include: multiple consecutive transmission resources within one or more mapping cycles.
  • the plurality of target transmission resources include: the first available transmission resource associated with the first SSB within a mapping cycle.
  • the plurality of target transmission resources include: second available transmission resources associated with the first SSB in each mapping cycle of one or more mapping cycles.
  • the second available transmission resources associated with the first SSB include one of the following: one or more available transmission resources associated with the first SSB; multiple available transmission resources in a subset of transmission resources associated with the first SSB ; The specified transmission resource associated with the first SSB; one or more available transmission resources between the starting available transmission resource and the end available transmission resource associated with the first SSB; wherein, the starting available transmission resource and/or End available transmission resources, which are designated transmission resources associated with the first SSB.
  • the value of the first indication information is the index number of the end target transmission resource.
  • the plurality of target transmission resources include: a plurality of consecutive transmission resources between the starting target transmission resource and the end target transmission resource.
  • the plurality of target transmission resources include: a plurality of available transmission resources associated with the first SSB between the starting target transmission resource and the end target transmission resource.
  • the starting target transmission resource among the plurality of target transmission resources is the first available transmission resource associated with the first SSB; wherein the first available transmission resource associated with the first SSB is one of the following: first The first available transmission resource associated with the first SSB within the first mapping cycle; the first available transmission resource in the subset of transmission resources associated with the first SSB within the first mapping cycle; the first available transmission resource within the first mapping cycle Specified transmission resources associated with the first SSB.
  • the second communication unit is configured to send second indication information; when the value of the second indication information is within the first value range, it is used by the terminal device to determine the transmission of the first SSB association. Resource subset.
  • the second communication unit is configured to send second indication information; when the value of the second indication information is within the second value range, the terminal device is used to determine the designation of the first SSB association. Transport resources.
  • the mapping cycle includes: transmission resources mapped by multiple SSBs; the multiple SSBs include the first SSB.
  • the second communication unit is configured to send fourth indication information, the fourth indication information is used by the terminal device to determine the first SSB, and the first SSB is the SSB used by the terminal device;
  • the fourth indication information is carried by the first DCI.
  • the transmission resource is a PRACH opportunity.
  • the second indication information is carried by the first DCI.
  • the third indication information is carried by one of the following: downlink control information DCI or radio resource control RRC signaling.
  • the third indication information is carried by the first DCI.
  • the first indication information is carried by one of the following: downlink control information DCI or radio resource control RRC signaling.
  • the first indication information is carried by the first DCI.
  • the format of the first DCI is DCI format 1_0.
  • the network device in the embodiment of the present application can implement the corresponding functions of the network device in the foregoing method embodiment.
  • each module (sub-module, unit or component, etc.) in the network device please refer to the corresponding description in the above method embodiment, and will not be described again here.
  • the functions described for each module (sub-module, unit or component, etc.) in the network device of the application embodiment can be implemented by different modules (sub-module, unit or component, etc.), or can be implemented by the same module. (Submodule, unit or component, etc.) implementation.
  • Figure 17 is a schematic structural diagram of a communication device 1700 according to an embodiment of the present application.
  • the communication device 1700 includes a processor 1710, and the processor 1710 can call and run a computer program from the memory, so that the communication device 1700 implements the method in the embodiment of the present application.
  • communication device 1700 may also include memory 1720.
  • the processor 1710 can call and run the computer program from the memory 1720, so that the communication device 1700 implements the method in the embodiment of the present application.
  • the memory 1720 may be a separate device independent of the processor 1710 , or may be integrated into the processor 1710 .
  • the communication device 1700 may further include a transceiver 1730, and the processor 1710 may control the transceiver 1730 to communicate with other devices.
  • the communication device 1700 may send information or data to other devices, or receive information sent by other devices. information or data.
  • the transceiver 1730 may include a transmitter and a receiver.
  • the transceiver 1730 may further include an antenna, and the number of antennas may be one or more.
  • the communication device 1700 can be a terminal device in the embodiment of the present application, and the communication device 1700 can implement the corresponding processes implemented by the terminal device in each method of the embodiment of the present application. For the sake of brevity, this is not mentioned here.
  • the communication device 1700 may be a network device according to the embodiment of the present application, and the communication device 1700 may implement the corresponding processes implemented by the network device in the various methods of the embodiment of the present application. For the sake of brevity, the communication device 1700 will not be mentioned here. Again.
  • Figure 18 is a schematic structural diagram of a chip 1800 according to an embodiment of the present application.
  • the chip 1800 includes a processor 1810, and the processor 1810 can call and run a computer program from the memory to implement the method in the embodiment of the present application.
  • chip 1800 may also include memory 1820.
  • the processor 1810 can call and run the computer program from the memory 1820 to implement the method executed by the terminal device or network device in the embodiment of the present application.
  • the memory 1820 may be a separate device independent of the processor 1810 , or may be integrated into the processor 1810 .
  • the chip 1800 may also include an input interface 1830.
  • the processor 1810 can control the input interface 1830 to communicate with other devices or chips. Specifically, it can obtain information or data sent by other devices or chips.
  • the chip 1800 may also include an output interface 1840.
  • the processor 1810 can control the output interface 1840 to communicate with other devices or chips. Specifically, it can output information or data to other devices or chips.
  • the chip can be applied to the terminal device in the embodiment of the present application, and the chip can implement the corresponding processes implemented by the terminal device in each method of the embodiment of the present application. For the sake of brevity, details will not be repeated here.
  • the chip can be applied to the network device in the embodiment of the present application, and the chip can implement the corresponding processes implemented by the network device in the various methods of the embodiment of the present application. For the sake of simplicity, they will not be described again. .
  • the chips used in terminal equipment and network equipment can be the same chip or different chips. It should be understood that the chips mentioned in the embodiments of this application may also be called system-on-chip, system-on-a-chip, system-on-chip or system-on-chip, etc.
  • the processor mentioned above can be a general-purpose processor, a digital signal processor (DSP), an off-the-shelf programmable gate array (FPGA), an application specific integrated circuit (ASIC), or Other programmable logic devices, transistor logic devices, discrete hardware components, etc.
  • DSP digital signal processor
  • FPGA off-the-shelf programmable gate array
  • ASIC application specific integrated circuit
  • the above-mentioned general processor may be a microprocessor or any conventional processor.
  • non-volatile memory may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory.
  • non-volatile memory can be read-only memory (ROM), programmable ROM (PROM), erasable programmable read-only memory (erasable PROM, EPROM), electrically removable memory. Erase electrically programmable read-only memory (EPROM, EEPROM) or flash memory.
  • Volatile memory can be random access memory (RAM).
  • the memory in the embodiment of the present application can also be a static random access memory (static RAM, SRAM), a dynamic random access memory (dynamic RAM, DRAM), Synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection Dynamic random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM) and so on. That is, memories in embodiments of the present application are intended to include, but are not limited to, these and any other suitable types of memories.
  • FIG 19 is a schematic block diagram of a communication system 1900 according to an embodiment of the present application.
  • the communication system 1900 includes a terminal device 1910 and a network device 1920.
  • the terminal device 1910 is used to perform the above communication method; the network device 1920 is used to perform the above communication method.
  • the terminal device 1910 can be used to implement the corresponding functions implemented by the terminal device in the above method, and the network device 1920 can be used to implement the corresponding functions implemented by the network device in the above method.
  • no further details will be given here.
  • the computer program product includes one or more computer instructions.
  • the computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable device.
  • 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 over a wired connection from a website, computer, server, or data center (such as coaxial cable, optical fiber, Digital Subscriber Line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) means to transmit to another website, computer, server or data center.
  • the computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server or data center integrated with one or more available media.
  • the available media may be magnetic media (eg, floppy disk, hard disk, tape), optical media (eg, DVD), or semiconductor media (eg, Solid State Disk (SSD)), etc.
  • the size of the sequence numbers of the above-mentioned processes does not mean the order of execution.
  • the execution order of each process should be determined by its functions and internal logic, and should not be used in the embodiments of the present application.
  • the implementation process constitutes any limitation.

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

Abstract

La présente demande concerne un procédé de communication, un dispositif terminal et un dispositif de réseau. Le procédé comprend l'étape suivante : un dispositif terminal reçoit des premières informations d'indication, les premières informations d'indication étant utilisées pour indiquer s'il faut retransmettre un canal d'accès aléatoire physique (PRACH).
PCT/CN2022/100053 2022-06-21 2022-06-21 Procédé de communication, dispositif terminal et dispositif de réseau WO2023245407A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2022/100053 WO2023245407A1 (fr) 2022-06-21 2022-06-21 Procédé de communication, dispositif terminal et dispositif de réseau

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017023066A1 (fr) * 2015-08-06 2017-02-09 엘지전자 주식회사 Procédé de mis en œuvre d'un accès aléatoire et appareil mtc
CN112584537A (zh) * 2019-09-30 2021-03-30 中国移动通信有限公司研究院 Prach资源的配置方法及设备
WO2021207925A1 (fr) * 2020-04-14 2021-10-21 Oppo广东移动通信有限公司 Procédé et appareil de détermination de ressources, et dispositif et support d'enregistrement
CN114501658A (zh) * 2020-10-23 2022-05-13 展讯半导体(南京)有限公司 数据重复传输方法及装置、存储介质、终端、基站

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017023066A1 (fr) * 2015-08-06 2017-02-09 엘지전자 주식회사 Procédé de mis en œuvre d'un accès aléatoire et appareil mtc
CN112584537A (zh) * 2019-09-30 2021-03-30 中国移动通信有限公司研究院 Prach资源的配置方法及设备
WO2021207925A1 (fr) * 2020-04-14 2021-10-21 Oppo广东移动通信有限公司 Procédé et appareil de détermination de ressources, et dispositif et support d'enregistrement
CN114501658A (zh) * 2020-10-23 2022-05-13 展讯半导体(南京)有限公司 数据重复传输方法及装置、存储介质、终端、基站

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