WO2023155653A1 - Procédé, dispositif et appareil de transmission répétée de prach, et support de stockage - Google Patents

Procédé, dispositif et appareil de transmission répétée de prach, et support de stockage Download PDF

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Publication number
WO2023155653A1
WO2023155653A1 PCT/CN2023/072815 CN2023072815W WO2023155653A1 WO 2023155653 A1 WO2023155653 A1 WO 2023155653A1 CN 2023072815 W CN2023072815 W CN 2023072815W WO 2023155653 A1 WO2023155653 A1 WO 2023155653A1
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WIPO (PCT)
Prior art keywords
ssb
network device
transmission
group
prach
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Application number
PCT/CN2023/072815
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English (en)
Chinese (zh)
Inventor
费永强
高雪娟
Original Assignee
大唐移动通信设备有限公司
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Publication of WO2023155653A1 publication Critical patent/WO2023155653A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
    • H04B7/0695—Hybrid systems, i.e. switching and simultaneous transmission using beam selection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information
    • H04W74/004—Transmission of channel access control information in the uplink, i.e. towards network
    • 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 disclosure relates to the technical field of wireless communication, and in particular to a PRACH repeated transmission method, device, device and storage medium.
  • PRACH Physical Random Access Channel
  • NR New Radio
  • the terminal Before accessing a network device (such as a next-generation Node B (next Generation Node B, gNB)) and obtaining the communication service of the network device, the terminal (also called user equipment (User Equipment, UE)) needs to send a PRACH to initiate a random access enter.
  • a network device such as a next-generation Node B (next Generation Node B, gNB)
  • the terminal also called user equipment (User Equipment, UE)
  • the coverage performance of the PRACH is particularly important. For example, for a terminal located in an area with large fading such as a cell edge or a basement, the PRACH transmission loss is large, and it is especially necessary to enhance the coverage of the PRACH.
  • Embodiments of the present disclosure provide a PRACH retransmission method, device, device, and storage medium, so as to improve the coverage performance of the PRACH.
  • an embodiment of the present disclosure provides a physical random access channel PRACH repeated transmission method, which is applied to a terminal, including:
  • the determining the multiple PRACH transmission beams for repeated transmission according to a predefined rule includes:
  • the transmission beams of multiple PRACHs for repeated transmission According to the correspondence between the random access channel opportunity RO group and the synchronization signal block SSB used for repeated transmission of multiple PRACHs, determine the transmission beams of multiple PRACHs for repeated transmission; or,
  • the SSB associated with the first RO in the RO group used for repeated transmission of multiple PRACHs determine the transmission beams of the multiple PRACHs for repeated transmission;
  • the sending beams of the multiple PRACHs in the repeated transmission are the same.
  • the determining the multiple PRACH transmission beams for repeated transmission according to a predefined rule includes:
  • the transmission beams of the multiple PRACHs for repeated transmission are determined.
  • the SSB associated with the first RO in the RO group used for repeated transmission of multiple PRACHs and the SSB index cyclic sequence corresponding to the SSB actually sent by the network device, determine the transmission beams of the multiple PRACHs for repeated transmission ,include:
  • the index of the SSB associated with the first RO in the RO group is used as the starting index, and each RO corresponds to an SSB.
  • the SSB performs sequential association to determine the transmission beams of multiple PRACHs that are repeatedly transmitted.
  • the SSB associated with the first RO in the RO group used for repeated transmission of multiple PRACHs and the SSB index cyclic sequence corresponding to the SSB actually sent by the network device, determine the transmission beams of the multiple PRACHs for repeated transmission ,include:
  • the SSB index cyclic sequence corresponding to the SSB actually sent by the network device, the number of SSBs actually sent by the network device, and the number of repeated transmissions of the PRACH determine Multiple PRACH transmit beams for repeated transmission.
  • the SSB index cyclic sequence corresponding to the SSB actually sent by the network device and the actual The number of SSBs sent and the number of repeated transmissions of the PRACH determine the transmission beams of multiple PRACHs that are repeatedly transmitted, including:
  • the index of the SSB associated with the first RO in the RO group is used as the starting index, and the SSB is in one-to-one correspondence with the RO, and the RO in the RO group and the actual sent by the network device
  • the SSB performs sequential association to determine multiple PRACH transmission beams for repeated transmission, wherein the number of SSBs actually transmitted by the network device is equal to the number of repeated transmissions of the PRACH; or,
  • each SSB corresponds to M/N ROs, for the ROs in the RO group and the network device
  • the SSBs actually sent are sequentially correlated to determine multiple PRACH transmission beams for repeated transmission, wherein the M is the number of repeated transmissions of the PRACH, and the N is the number of SSBs actually sent by the network device. Said N is less than or equal to said M, and M/N is a positive integer; or,
  • the index of the SSB associated with the first RO in the RO group is used as the starting index, and the previous Each of the SSBs corresponds to RO, after Each of the SSBs corresponds to ROs, sequentially correlating the ROs in the RO group with the SSB actually sent by the network device, and determining multiple PRACH transmission beams for repeated transmission, where the M is the number of repeated transmissions of the PRACH, and the The N is the number of SSBs actually sent by the network device, and the N is less than or equal to the M; or,
  • each RO corresponds to N/M SSBs, and for the ROs in the RO group and the network device
  • the SSBs actually sent are sequentially correlated to determine multiple PRACH transmission beams for repeated transmission, wherein the M is the number of repeated transmissions of the PRACH, and the N is the number of SSBs actually sent by the network device. Said N is greater than or equal to said M, and N/M is a positive integer; or,
  • the index of the SSB associated with the first RO in the RO group is used as the starting index, and the previous Each RO in each RO corresponds to SSB, after Each RO in each RO corresponds to SSB, for the RO in the RO group and the network
  • the SSBs actually sent by the network device are sequentially correlated, and multiple PRACH transmission beams for repeated transmission are determined, wherein the M is the number of repeated transmissions of the PRACH, and the N is the number of SSBs actually sent by the network device , the N is greater than or equal to the M.
  • the determining the transmission beams of multiple PRACHs for repeated transmission according to the predefined rules and the indication information sent by the network device includes:
  • the network device receiving first indication information sent by the network device, where the first indication information is used to indicate a predefined rule used to determine multiple PRACH transmission beams for repeated transmission;
  • the transmission beams of multiple PRACHs for repeated transmission are determined.
  • the determining the sending beams of multiple PRACHs for repeated transmission according to the indication information sent by the network device includes:
  • the network device receiving second indication information sent by the network device, where the second indication information is used to indicate the SSB associated with the ROs in the RO group used to repeatedly transmit multiple PRACHs;
  • transmit beams of multiple PRACHs for repeated transmission are determined.
  • the second indication information includes indication information indicating an index of an SSB associated with an RO in the RO group; or,
  • the second indication information includes indication information indicating an index of an SSB association pattern corresponding to the RO group, and the SSB association pattern is predefined or indicated by a network device.
  • the embodiment of the present disclosure also provides a physical random access channel PRACH retransmission method, which is applied to network equipment, including:
  • the determining the multiple PRACH transmission beams for repeated transmission according to a predefined rule includes:
  • the transmission beams of multiple PRACHs for repeated transmission According to the correspondence between the random access channel opportunity RO group and the synchronization signal block SSB used for repeated transmission of multiple PRACHs, determine the transmission beams of multiple PRACHs for repeated transmission; or,
  • the SSB associated with the first RO in the RO group for repeated transmission of multiple PRACHs determine multiple PRACH transmit beams for repeated transmission
  • the sending beams of the multiple PRACHs in the repeated transmission are the same.
  • the determining the multiple PRACH transmission beams for repeated transmission according to a predefined rule includes:
  • the SSB associated with the first RO in the RO group used for repeated transmission of multiple PRACHs and the SSB index cyclic sequence corresponding to the SSB actually sent by the network device, determine the transmission beams of the multiple PRACHs for repeated transmission.
  • the SSB associated with the first RO in the RO group used for repeated transmission of multiple PRACHs and the SSB index cyclic sequence corresponding to the SSB actually sent by the network device, determine the multiple PRACHs for repeated transmission Transmit beams, including:
  • the index of the SSB associated with the first RO in the RO group is used as the starting index, and each RO corresponds to an SSB.
  • the SSB performs sequential association to determine the transmission beams of multiple PRACHs that are repeatedly transmitted.
  • the SSB associated with the first RO in the RO group used for repeated transmission of multiple PRACHs and the SSB index cyclic sequence corresponding to the SSB actually sent by the network device, determine the multiple PRACHs for repeated transmission Transmit beams, including:
  • the SSB index cyclic sequence corresponding to the SSB actually sent by the network device, the number of SSBs actually sent by the network device, and the repetition of the PRACH The number of times of transmission determines the transmission beams of multiple PRACHs for repeated transmission.
  • the SSB index cyclic sequence corresponding to the SSB actually sent by the network device, and the SSB actually sent by the network device determine the transmission beams of multiple PRACHs that are repeatedly transmitted, including:
  • the index of the SSB associated with the first RO in the RO group is used as the starting index, and the SSB is in one-to-one correspondence with the RO, and the RO in the RO group and the actual sent by the network device
  • the SSB performs sequential association to determine the transmit beams of multiple PRACHs that are repeatedly transmitted, Wherein, the number of SSBs actually sent by the network device is equal to the number of repeated transmissions of the PRACH; or,
  • each SSB corresponds to M/N ROs, for the ROs in the RO group and the network device
  • the SSBs actually sent are sequentially correlated to determine multiple PRACH transmission beams for repeated transmission, wherein the M is the number of repeated transmissions of the PRACH, and the N is the number of SSBs actually sent by the network device. Said N is less than or equal to said M, and M/N is a positive integer; or,
  • the index of the SSB associated with the first RO in the RO group is used as the starting index, and the previous Each of the SSBs corresponds to RO, after Each of the SSBs corresponds to ROs, sequentially correlating the ROs in the RO group with the SSB actually sent by the network device, and determining multiple PRACH transmission beams for repeated transmission, where the M is the number of repeated transmissions of the PRACH, and the The N is the number of SSBs actually sent by the network device, and the N is less than or equal to the M; or,
  • each RO corresponds to N/M SSBs, and for the ROs in the RO group and the network device
  • the SSBs actually sent are sequentially correlated to determine multiple PRACH transmission beams for repeated transmission, wherein the M is the number of repeated transmissions of the PRACH, and the N is the number of SSBs actually sent by the network device. Said N is greater than or equal to said M, and N/M is a positive integer; or,
  • the index of the SSB associated with the first RO in the RO group is used as the starting index, and the previous Each RO in each RO corresponds to SSB, after Each RO in each RO corresponds to SSBs, sequentially correlate the ROs in the RO group with the SSBs actually sent by the network device, and determine multiple PRACH transmission beams for repeated transmission, where the M is the number of repeated transmissions of the PRACH, and The N is the number of SSBs actually sent by the network device, and the N is greater than or equal to the M.
  • the determining multiple PRACH transmission beams for repeated transmission according to predefined rules and indication information sent to the terminal includes:
  • the transmission beams of multiple PRACHs for repeated transmission are determined.
  • the determining the transmission beams of multiple PRACHs for repeated transmission according to the indication information sent to the terminal includes:
  • transmit beams of multiple PRACHs for repeated transmission are determined.
  • the second indication information includes indication information indicating an index of an SSB associated with an RO in the RO group; or,
  • the second indication information includes indication information indicating an index of an SSB association pattern corresponding to the RO group, where the SSB association pattern is predefined or indicated to the terminal by the network device.
  • an embodiment of the present disclosure further provides a terminal, including a memory, a transceiver, and a processor:
  • the memory is used to store computer programs; the transceiver is used to send and receive data under the control of the processor; the processor is used to read the computer programs in the memory and perform the following operations:
  • the determining the multiple PRACH transmission beams for repeated transmission according to a predefined rule includes:
  • the transmission beams of multiple PRACHs for repeated transmission According to the correspondence between the random access channel opportunity RO group and the synchronization signal block SSB used for repeated transmission of multiple PRACHs, determine the transmission beams of multiple PRACHs for repeated transmission; or,
  • the SSB associated with the first RO in the RO group used for repeated transmission of multiple PRACHs determine the transmission beams of the multiple PRACHs for repeated transmission;
  • the sending beams of the multiple PRACHs in the repeated transmission are the same.
  • the sending of multiple PRACHs that are repeatedly transmitted is determined according to a predefined rule Beams, including:
  • the transmission beams of the multiple PRACHs for repeated transmission are determined.
  • the SSB associated with the first RO in the RO group used for repeated transmission of multiple PRACHs and the SSB index cyclic sequence corresponding to the SSB actually sent by the network device, determine the transmission beams of the multiple PRACHs for repeated transmission ,include:
  • the index of the SSB associated with the first RO in the RO group is used as the starting index, and each RO corresponds to an SSB.
  • the SSB performs sequential association to determine the transmission beams of multiple PRACHs that are repeatedly transmitted.
  • the SSB associated with the first RO in the RO group used for repeated transmission of multiple PRACHs and the SSB index cyclic sequence corresponding to the SSB actually sent by the network device, determine the transmission beams of the multiple PRACHs for repeated transmission ,include:
  • the SSB index cyclic sequence corresponding to the SSB actually sent by the network device, the number of SSBs actually sent by the network device, and the number of repeated transmissions of the PRACH determine Multiple PRACH transmit beams for repeated transmission.
  • the SSB index cyclic sequence corresponding to the SSB actually sent by the network device, the number of SSBs actually sent by the network device, and the PRACH The number of repeated transmissions determines the transmission beams of multiple PRACHs for repeated transmissions, including:
  • the index of the SSB associated with the first RO in the RO group is used as the starting index, and the SSB is in one-to-one correspondence with the RO, and the RO in the RO group and the actual sent by the network device
  • the SSB performs sequential association to determine multiple PRACH transmission beams for repeated transmission, wherein the number of SSBs actually transmitted by the network device is equal to the number of repeated transmissions of the PRACH; or,
  • each SSB corresponds to M/N ROs, sequentially associate the ROs in the RO group with the SSBs actually sent by the network device, and determine the transmission beams of multiple PRACHs for repeated transmission, wherein,
  • the M is the number of repeated transmissions of the PRACH
  • the N is the number of SSBs actually sent by the network device
  • the N is less than or equal to the M
  • M/N is a positive integer
  • the index of the SSB associated with the first RO in the RO group is used as the starting index, and the previous Each of the SSBs corresponds to RO, after Each of the SSBs corresponds to ROs, sequentially correlating the ROs in the RO group with the SSB actually sent by the network device, and determining multiple PRACH transmission beams for repeated transmission, where the M is the number of repeated transmissions of the PRACH, and the The N is the number of SSBs actually sent by the network device, and the N is less than or equal to the M; or,
  • each RO corresponds to N/M SSBs, and for the ROs in the RO group and the network device
  • the SSBs actually sent are sequentially correlated to determine multiple PRACH transmission beams for repeated transmission, wherein the M is the number of repeated transmissions of the PRACH, and the N is the number of SSBs actually sent by the network device. Said N is greater than or equal to said M, and N/M is a positive integer; or,
  • the index of the SSB associated with the first RO in the RO group is used as the starting index, and the previous Each RO in each RO corresponds to SSB, after Each RO in each RO corresponds to SSBs, sequentially correlate the ROs in the RO group with the SSBs actually sent by the network device, and determine multiple PRACH transmission beams for repeated transmission, where the M is the number of repeated transmissions of the PRACH, and The N is the number of SSBs actually sent by the network device, and the N is greater than or equal to the M.
  • the determining the transmission beams of multiple PRACHs for repeated transmission according to the predefined rules and the indication information sent by the network device includes:
  • the network device receiving first indication information sent by the network device, where the first indication information is used to indicate a predefined rule used to determine multiple PRACH transmission beams for repeated transmission;
  • the determining the sending beams of multiple PRACHs for repeated transmission according to the indication information sent by the network device includes:
  • the network device receiving second indication information sent by the network device, where the second indication information is used to indicate the SSB associated with the ROs in the RO group used to repeatedly transmit multiple PRACHs;
  • transmit beams of multiple PRACHs for repeated transmission are determined.
  • the second indication information includes indication information indicating an index of an SSB associated with an RO in the RO group; or,
  • the second indication information includes indication information indicating an index of an SSB association pattern corresponding to the RO group, and the SSB association pattern is predefined or indicated by a network device.
  • an embodiment of the present disclosure further provides a network device, including a memory, a transceiver, and a processor:
  • the memory is used to store computer programs; the transceiver is used to send and receive data under the control of the processor; the processor is used to read the computer programs in the memory and perform the following operations:
  • the determining the multiple PRACH transmission beams for repeated transmission according to a predefined rule includes:
  • the transmission beams of multiple PRACHs for repeated transmission According to the correspondence between the random access channel opportunity RO group and the synchronization signal block SSB used for repeated transmission of multiple PRACHs, determine the transmission beams of multiple PRACHs for repeated transmission; or,
  • the SSB associated with the first RO in the RO group used for repeated transmission of multiple PRACHs determine the transmission beams of the multiple PRACHs for repeated transmission;
  • the sending beams of the multiple PRACHs in the repeated transmission are the same.
  • the determining the multiple PRACH transmission beams for repeated transmission according to a predefined rule includes:
  • the network device determines the repeated transmission Transmission beams of multiple PRACHs.
  • the SSB associated with the first RO in the RO group used for repeated transmission of multiple PRACHs and the SSB index cyclic sequence corresponding to the SSB actually sent by the network device, determine the multiple PRACHs for repeated transmission Transmit beams, including:
  • the index of the SSB associated with the first RO in the RO group is used as the starting index, and each RO corresponds to an SSB.
  • the SSB performs sequential association to determine the transmission beams of multiple PRACHs that are repeatedly transmitted.
  • the SSB associated with the first RO in the RO group used for repeated transmission of multiple PRACHs and the SSB index cyclic sequence corresponding to the SSB actually sent by the network device, determine the multiple PRACHs for repeated transmission Transmit beams, including:
  • the SSB index cyclic sequence corresponding to the SSB actually sent by the network device, the number of SSBs actually sent by the network device, and the repetition of the PRACH The number of times of transmission determines the transmission beams of multiple PRACHs for repeated transmission.
  • the SSB index cyclic sequence corresponding to the SSB actually sent by the network device, and the SSB actually sent by the network device determine the transmission beams of multiple PRACHs that are repeatedly transmitted, including:
  • the index of the SSB associated with the first RO in the RO group is used as the starting index, and the SSB is in one-to-one correspondence with the RO, and the RO in the RO group and the actual sent by the network device
  • the SSB performs sequential association to determine multiple PRACH transmission beams for repeated transmission, wherein the number of SSBs actually transmitted by the network device is equal to the number of repeated transmissions of the PRACH; or,
  • each SSB corresponds to M/N ROs, for the ROs in the RO group and the network device
  • the SSBs actually sent are sequentially correlated to determine multiple PRACH transmission beams for repeated transmission, where the M is the number of repeated transmissions of the PRACH, and the N is the number of repeated transmissions of the network settings.
  • the number of SSBs actually sent by the device the N is less than or equal to the M, and M/N is a positive integer; or,
  • the index of the SSB associated with the first RO in the RO group is used as the starting index, and the previous Each of the SSBs corresponds to RO, after Each of the SSBs corresponds to ROs, sequentially correlating the ROs in the RO group with the SSB actually sent by the network device, and determining multiple PRACH transmission beams for repeated transmission, where the M is the number of repeated transmissions of the PRACH, and the The N is the number of SSBs actually sent by the network device, and the N is less than or equal to the M; or,
  • each RO corresponds to N/M SSBs, and for the ROs in the RO group and the network device
  • the SSBs actually sent are sequentially correlated to determine multiple PRACH transmission beams for repeated transmission, wherein the M is the number of repeated transmissions of the PRACH, and the N is the number of SSBs actually sent by the network device. Said N is greater than or equal to said M, and N/M is a positive integer; or,
  • the index of the SSB associated with the first RO in the RO group is used as the starting index, and the previous Each RO in each RO corresponds to SSB, after Each RO in each RO corresponds to SSBs, sequentially correlate the ROs in the RO group with the SSBs actually sent by the network device, and determine multiple PRACH transmission beams for repeated transmission, where the M is the number of repeated transmissions of the PRACH, and The N is the number of SSBs actually sent by the network device, and the N is greater than or equal to the M.
  • the determining multiple PRACH transmission beams for repeated transmission according to predefined rules and indication information sent to the terminal includes:
  • the transmission beams of multiple PRACHs for repeated transmission are determined.
  • the determining the transmission beams of multiple PRACHs for repeated transmission according to the indication information sent to the terminal includes:
  • transmit beams of multiple PRACHs for repeated transmission are determined.
  • the second indication information includes indication information indicating an index of an SSB associated with an RO in the RO group; or,
  • the second indication information includes indication information indicating an index of an SSB association pattern corresponding to the RO group, where the SSB association pattern is predefined or indicated to the terminal by the network device.
  • the embodiment of the present disclosure also provides a physical random access channel PRACH retransmission device, which is applied to a terminal, including:
  • the first determining unit is configured to determine multiple PRACH transmission beams for repeated transmission according to predefined rules and/or indication information sent by the network device;
  • a sending unit configured to send the multiple PRACHs to the network device according to the sending beam.
  • the embodiment of the present disclosure also provides a physical random access channel PRACH retransmission device, which is applied to network equipment, including:
  • the second determination unit is configured to determine the transmission beams of multiple PRACHs for repeated transmission according to predefined rules and/or indication information sent to the terminal;
  • the receiving unit is configured to receive the multiple PRACHs sent by the terminal according to the sending beam.
  • the embodiment of the present disclosure also provides a computer-readable storage medium, the computer-readable storage medium stores a computer program, and the computer program is used to make the computer execute the PRACH repetition described in the first aspect above The steps of the transmission method, or the steps of performing the PRACH repeated transmission method described in the second aspect above.
  • the embodiment of the present disclosure also provides a communication device, where a computer program is stored in the communication device, and the computer program is used to make the communication device perform the steps of the PRACH repeated transmission method described in the first aspect as described above , or execute the steps of the PRACH retransmission method described in the second aspect.
  • the embodiments of the present disclosure further provide a processor-readable storage medium, where the processor-readable storage medium stores a computer program, and the computer program is used to enable the processor to perform the above-mentioned first aspect.
  • the steps of the PRACH repeat transmission method, or perform the second aspect as described above The steps of the PRACH repeated transmission method.
  • the embodiment of the present disclosure also provides a chip product, the computer program is stored in the chip product, and the computer program is used to make the chip product execute the steps of the PRACH repeated transmission method described in the first aspect as described above , or execute the steps of the PRACH retransmission method described in the second aspect.
  • the terminal can determine multiple PRACH transmission beams for repeated transmission according to the predefined rules of the protocol and/or the indication information sent by the network device, so that the terminal can determine the multiple PRACH transmission beams according to the The determined transmission beams of each PRACH repeatedly transmit multiple PRACHs to the network device, thereby improving the coverage performance of the PRACH.
  • FIG. 1 is a schematic diagram of an RO configuration method provided by the prior art
  • FIG. 2 is a schematic diagram of a method for determining an uplink beam when a single PRACH is sent according to an embodiment of the present disclosure
  • Fig. 3 is one of the schematic flow charts of the PRACH repeated transmission method provided by the embodiment of the present disclosure
  • FIG. 4 is the second schematic flow diagram of the PRACH repeated transmission method provided by an embodiment of the present disclosure.
  • FIG. 5 is a schematic diagram of an application scenario provided by an embodiment of the present disclosure.
  • Fig. 6 is one of the implementation schematic diagrams of the PRACH repeated transmission method provided by the embodiment of the present disclosure.
  • FIG. 7 is the second implementation schematic diagram of the PRACH repeated transmission method provided by the embodiment of the present disclosure.
  • FIG. 8 is the third implementation schematic diagram of the PRACH repeated transmission method provided by the embodiment of the present disclosure.
  • FIG. 9 is a fourth implementation schematic diagram of a PRACH repeated transmission method provided by an embodiment of the present disclosure.
  • FIG. 10 is the fifth implementation schematic diagram of the PRACH repeated transmission method provided by the embodiment of the present disclosure.
  • FIG. 11 is the sixth implementation schematic diagram of the PRACH repeated transmission method provided by the embodiment of the present disclosure.
  • FIG. 12 is the seventh implementation schematic diagram of the PRACH repeated transmission method provided by the embodiment of the present disclosure.
  • FIG. 13 is the eighth implementation schematic diagram of the PRACH repeated transmission method provided by the embodiment of the present disclosure.
  • FIG. 14 is a schematic structural diagram of a terminal provided by an embodiment of the present disclosure.
  • FIG. 15 is a schematic structural diagram of a network device provided by an embodiment of the present disclosure.
  • Fig. 16 is one of the structural schematic diagrams of the PRACH repeated transmission device provided by the embodiment of the present disclosure.
  • FIG. 17 is a second structural schematic diagram of a PRACH retransmission device provided by an embodiment of the present disclosure.
  • configuration information related to a Random Access Channel (Random Access Channel, RACH) is carried in a System Information Block 1 (System Information Block, SIB1) and sent by way of broadcast.
  • SIB1 System Information Block 1
  • the terminal can obtain the RACH configuration information by receiving SIB1, determine the appropriate random access channel opportunity (RACH Occasion, RO) according to the RACH configuration information, and send PRACH in RO to initiate random access.
  • RACH Occasion, RO random access channel opportunity
  • the method for a network device to configure/indicate RO time-frequency resources through SIB1 is roughly as follows:
  • FIG. 1 is a schematic diagram of the RO configuration method provided by the prior art. As shown in Figure 1, it is assumed that there are 4 SSBs in total; the number of frequency division ROs indicated by msg1-FDM is 4; each SSB is associated with 2 ROs (one SSB corresponds to multiple ROs); therefore, a complete SSB-to-RO association cycle includes 8 ROs, namely RO0-RO7.
  • the terminal can select an SSB that satisfies the access condition (for example, the RSRP of the SSB is greater than a threshold value) according to the measurement result of the Reference Signal Received Power (RSRP) of the SSB, and then The RO associated with the selected SSB sends PRACH to initiate random access. If one SSB is associated with multiple ROs, the terminal can randomly select one of the multiple ROs.
  • the access condition for example, the RSRP of the SSB is greater than a threshold value
  • RSRP Reference Signal Received Power
  • the existing NR protocol does not limit how to design the uplink beam of the terminal.
  • a possible implementation manner is that, according to the selected SSB, the terminal uses the receiving beam receiving the SSB as the sending beam of the PRACH, and sends the PRACH with this beam. This mainly utilizes the beam reciprocity between the uplink signal and the downlink signal.
  • FIG. 2 is a schematic diagram of a method for determining an uplink beam when a single transmission of PRACH is provided by an embodiment of the present disclosure.
  • the network device uses different beams to send SSB0, SSB1, SSB2, and SSB3, and the terminal has a receiving beam (Rx beam) 0.
  • the propagation loss of wireless signals increases, resulting in shortened signal transmission distances and reduced network coverage performance.
  • the uplink transmission that is, the transmission sent by the terminal and received by the network device, since the transmission power of the terminal is low, the coverage of the uplink channel is more limited than that of the downlink.
  • PRACH is an important uplink transmission channel in NR. Before accessing the network device and obtaining the communication service of the network device, the terminal needs to send a PRACH to initiate random access. Whether the network equipment can correctly detect the PRACH sent by the terminal is directly related to whether the terminal can successfully access the cell, so The coverage performance of PRACH is particularly important. For example, for a terminal located in an area with large fading such as a cell edge or a basement, the PRACH transmission loss is large, and it is especially necessary to enhance the coverage of the PRACH.
  • the PRACH of the existing NR does not support repeated transmission.
  • various embodiments of the present disclosure provide a solution to support repeated transmission of PRACH, and determine the transmission beams of multiple PRACHs for repeated transmission through protocol pre-definition and/or network device indication, so that the terminal can Determine the uplink beam when the PRACH is repeatedly sent, and the network device can also select an appropriate detection scheme according to the uplink beam of the repeatedly sent PRACH, such as performing signal combination on the PRACH of the same uplink beam and then performing coherent detection, and separately detecting the PRACH on different uplink beams. Coherent detection is performed and then the detection results are soft combined, so as to improve the detection performance of the repeatedly transmitted PRACH, thereby improving the PRACH coverage performance.
  • Figure 3 is one of the schematic flow diagrams of the PRACH repeated transmission method provided by the embodiment of the present disclosure, the method can be applied to the terminal, as shown in Figure 3, the method includes the following steps:
  • Step 300 according to the predefined rules and/or the instruction information sent by the network equipment, determine the transmission beams of multiple PRACHs for repeated transmission;
  • various embodiments of the present disclosure provide a solution to support repeated transmission of PRACH, wherein the terminal can determine the Multiple PRACH transmit beams for repeated transmission.
  • a beam is sometimes described as a spatial filter or spatial relation information.
  • an uplink beam when a terminal sends is called an uplink spatial filter, or an uplink beam when a network device sends
  • the downlink beam is called downlink spatial correlation information and so on. Accordingly, similar descriptions may be considered equivalent.
  • Step 301 Send multiple PRACHs to the network device according to the sending beam.
  • the terminal after the terminal determines multiple PRACH transmission beams for repeated transmission, it can repeatedly transmit multiple PRACHs to the network device according to the determined transmission beams of each PRACH, thereby improving the coverage performance of the PRACH.
  • the terminal can determine the transmission of multiple PRACHs for repeated transmission according to the predefined rules of the protocol and/or the indication information sent by the network device Beams, so that multiple PRACHs can be repeatedly sent to the network device according to the determined sending beams of each PRACH, thereby improving the coverage performance of the PRACH.
  • determine multiple PRACH transmission beams for repeated transmission including:
  • the transmission beams of multiple PRACHs for repeated transmission According to the correspondence between the random access channel opportunity RO group and the synchronization signal block SSB used for repeated transmission of multiple PRACHs, determine the transmission beams of multiple PRACHs for repeated transmission; or,
  • the SSB associated with the first RO in the RO group used for repeated transmission of multiple PRACHs determine the transmission beams of the multiple PRACHs for repeated transmission;
  • the sending beams of the multiple PRACHs that are repeatedly transmitted are the same.
  • the terminal determines the transmission beams of multiple PRACHs for repeated transmission according to the predefined rules of the protocol. If the predefined rules stipulate that the transmission beams of multiple PRACHs for repeated transmissions are the same, in a possible implementation mode, the terminal can use Based on the correspondence between RO groups and SSBs that repeatedly transmit multiple PRACHs, determine the SSB corresponding to one RO group, and then determine the transmission beams of multiple PRACHs corresponding to the RO group; in another possible implementation, The terminal may determine the sending beams of the multiple PRACHs corresponding to the RO group according to the SSB associated with the first RO in the RO group used for repeated transmission of the multiple PRACHs.
  • the corresponding relationship between the RO group and the SSB can be indicated by the network device to the terminal, and the terminal can determine the SSB corresponding to an RO group according to the corresponding relationship between the RO group and the SSB, for example, SSB1, then the SSB1 can be received
  • the receiving beam is used as the sending beam of multiple PRACHs corresponding to the RO group.
  • the existing SSB-to-RO association method can be reused to indicate the SSB associated with the first RO in an RO group, and the terminal determines the ( The SSBs associated with other ROs except the first RO are the same as the SSBs associated with the first RO in the RO group, that is, they are all SSB1, then the receiving beam receiving the SSB1 can be used as multiple PRACHs corresponding to the RO group Among the multiple PRACHs, the sending beams of the other PRACHs except the first PRACH are the same as the sending beams of the first PRACH.
  • the network device does not need to indicate the associated SSB of each RO used for repeated transmission of multiple PRACHs, thereby reducing the indication overhead; Moreover, when a network device receives multiple PRACHs corresponding to one RO group, it can be assumed that the transmission beams of the PRACHs are all the same. Therefore, it is possible to perform signal combination and then coherent detection among the ROs of an RO group, which is simple to implement and can improve Detection performance.
  • determine multiple PRACH transmission beams for repeated transmission including:
  • the transmission beams of the multiple PRACHs for repeated transmission are determined.
  • the terminal determines the transmission beams of multiple PRACHs for repeated transmission according to the rules predefined in the protocol, which may be based on the SSB associated with the first RO in the RO group for repeated transmission of multiple PRACHs and the SSB actually sent by the network device.
  • the corresponding SSB index cyclic sequence determines multiple PRACH transmission beams for repeated transmission.
  • the SSB actually sent by the network device may be, for example, the SSB indicated by the network device by sending the indication information ssb-PositionsInBurst; it may also be one or more SSBs uniquely determined in other ways.
  • the SSB actually sent by the network device includes SSB0, SSB1, SSB2, and SSB3, and the SSB index cyclic sequence corresponding to the SSB actually sent by the network device is 0-1-2-3-0-1-2-3-0- 1...
  • the SSB actually sent by the network device includes SSB0, SSB2 and SSB3, then the SSB index cycle sequence corresponding to the SSB actually sent by the network device is 0-2-3-0-2-3-0...
  • the terminal can determine the SSB associated with each RO in the RO group according to the SSB index cyclic sequence and the SSB associated with the first RO in the RO group, and then determine the multiple PRACH transmission beams corresponding to the RO group. It can be understood that the sending beams of the multiple PRACHs corresponding to the RO group determined in this manner may be different.
  • the SSB associated with the first RO in the RO group used for repeated transmission of multiple PRACHs and the SSB index cyclic sequence corresponding to the SSB actually sent by the network device, determine the transmission beams of the multiple PRACHs for repeated transmission, including :
  • the index of the SSB associated with the first RO in the RO group is used as the starting index, and each RO corresponds to an SSB, and the ROs in the RO group are sequentially associated with the SSB actually sent by the network device to determine repeated transmission multiple PRACH transmit beams.
  • the SSB index cyclic sequence corresponding to the SSB actually sent by the network device is 0-1-2-3-0-1-2-3-0-1...
  • the RO group The SSB associated with the first RO in the group is SSB1
  • the SSB associated with the first RO is SSB1
  • the SSB associated with the second RO is SSB2
  • the SSB associated with the third RO is SSB3
  • the SSB associated with the fourth RO is SSB0
  • the SSB associated with the fifth RO is SSB1
  • the SSB associated with the sixth RO is SSB2.
  • the transmit beams of multiple PRACHs corresponding to the RO group can be determined according to the receive beams of the SSBs.
  • the network device does not need to indicate the associated SSB of each RO used for repeated transmission of multiple PRACHs, thereby reducing the indication overhead; and, although multiple PRACHs corresponding to one RO group
  • the transmit beams of the SSB can be different, but the association between the SSB and the RO is determined, so the transmit beam of the PRACH is also determined, and the network device can determine its optimal reception on each RO according to the transmit beam of the PRACH corresponding to each RO. beam, so as to obtain beam diversity gain, which has better robustness when the terminal moves rapidly.
  • the SSB associated with the first RO in the RO group used for repeated transmission of multiple PRACHs and the SSB index cyclic sequence corresponding to the SSB actually sent by the network device, determine the transmission beams of the multiple PRACHs for repeated transmission, including :
  • the SSB index cyclic sequence corresponding to the SSB actually sent by the network device, the number of SSBs actually sent by the network device, and the number of repeated transmissions of the PRACH determine Multiple PRACH transmit beams for repeated transmission.
  • the SSB index cyclic sequence corresponding to the SSB is combined with information such as the number of SSBs actually transmitted by the network device and the number of repeated transmissions of the PRACH to determine the transmission beams of the multiple PRACHs.
  • the SSB index cyclic sequence corresponding to the SSB actually sent by the network device, the number of SSBs actually sent by the network device, and the repetition of the PRACH determines the transmission beams of multiple PRACHs that are repeatedly transmitted, including:
  • Method 1 According to the SSB index cycle sequence, the index of the SSB associated with the first RO in the RO group is used as the starting index, and the SSB corresponds to the RO one by one, and the ROs in the RO group are sequentially associated with the SSB actually sent by the network device. Determining multiple PRACH transmission beams for repeated transmission, wherein the number of SSBs actually transmitted by the network device is equal to the number of repeated transmissions of the PRACH; or,
  • Method 2 According to the SSB index cyclic sequence, the index of the SSB associated with the first RO in the RO group is used as the starting index, and each SSB corresponds to M/N ROs, and the ROs in the RO group and the SSB actually sent by the network device are calculated Sequence association, determining multiple PRACH transmission beams for repeated transmission, where M is the number of repeated transmissions of PRACH, N is the number of SSBs actually sent by the network device, N is less than or equal to M, and M/N is a positive integer; or,
  • Method 3 According to the SSB index cycle sequence, the index of the SSB associated with the first RO in the RO group is used as the starting index, and the previous Each of the SSBs corresponds to RO, after Each of the SSBs corresponds to The ROs in the RO group are sequentially associated with the SSBs actually sent by the network equipment to determine the transmission beams of multiple PRACHs that are repeatedly transmitted, where M is the number of repeated transmissions of the PRACH, and N is the number of SSBs actually sent by the network equipment number, N is less than or equal to M; or,
  • Method 4 According to the SSB index cyclic sequence, the index of the SSB associated with the first RO in the RO group is used as the starting index, and each RO corresponds to N/M SSBs, and the ROs in the RO group and the SSB actually sent by the network device are calculated Sequential association, determining multiple PRACH transmission beams for repeated transmission, where M is the number of repeated transmissions of PRACH, N is the number of SSBs actually sent by the network device, N is greater than or equal to M, and N/M is a positive integer; or,
  • Method 5 According to the SSB index cycle sequence, the index of the SSB associated with the first RO in the RO group is used as the starting index, and the previous Each RO in each RO corresponds to SSB, after Each RO in each RO corresponds to SSB, sequentially associate the ROs in the RO group with the SSBs actually sent by the network equipment, and determine the sending beams of multiple PRACHs that are repeatedly transmitted.
  • M is the number of repeated transmissions of the PRACH
  • N is the number of SSBs actually sent by the network device, and N is greater than or equal to M.
  • the number of SSBs actually sent by the network device is 4, and the SSB index cyclic sequence corresponding to the SSBs actually sent by the network device is 0-1-2-3-0-1-2-3-0-1...;
  • the number of repeated transmissions of PRACH is 4, that is, the RO group includes 4 ROs, and the SSB associated with the first RO in the RO group is SSB1 can start from the position where the index is 1 in the index cyclic sequence, and the SSB corresponds to the RO one by one, sequentially associate the ROs in the RO group with the SSBs actually sent by the network device, and determine the associated SSB of each RO in the RO group.
  • the SSB associated with the first RO is SSB1
  • the SSB associated with the second RO is SSB2
  • the SSB associated with the third RO is SSB3
  • the SSB associated with the fourth RO is SSB0.
  • each SSB corresponds to 2 ROs, sequentially associate the ROs in the RO group with the SSBs actually sent by the network device, and determine the SSB associated with each RO in the RO group, that is, the first RO and the second RO
  • the SSBs associated with the two ROs are both SSB1
  • the SSBs associated with the third RO and the fourth RO are both SSB2
  • Each SSB in the first two SSBs corresponds to two ROs, and the last two SSBs (namely SSB3 and SSB0)
  • Each SSB corresponds to 1 RO
  • the RO in the RO group is sequentially associated with the SSB actually sent by the network device.
  • Determine the SSB associated with each RO in the RO group that is, the SSB associated with the first RO and the second RO are both SSB1, the SSB associated with the third RO and the fourth RO are both SSB2, and the SSB associated with the fifth RO is The SSB is SSB3, and the SSB associated with the sixth RO is SSB0.
  • the number of SSBs actually sent by the network device is 4, and the SSB index cyclic sequence corresponding to the SSBs actually sent by the network device is 0-1 -2-3-0-1-2-3-0-1...;
  • the number of repeated transmissions of PRACH is 2, that is, the RO group includes 2 ROs, and the SSB associated with the first RO in the RO group is SSB1, then You can start from the position where the index is 1 in the index cyclic sequence, and each RO corresponds to 2 SSBs, sequentially associate the ROs in the RO group with the SSBs actually sent by the network device, and determine the SSB associated with each RO in the RO group, That is, the SSBs associated with the first RO are SSB1 and SSB2, and the SSBs associated with the second RO are SSB3 and SSB0.
  • the first RO corresponds to 2 SSBs
  • the last RO i.e. the second RO
  • the ROs are sequentially associated with the SSBs actually sent by the network device, and the SSBs associated with each RO in the RO group are determined, that is, the SSBs associated with the first RO are SSB1 and SSB2, and the SSBs associated with the second RO are SSB0.
  • the transmit beams of multiple PRACHs corresponding to the RO group can be determined according to the receive beams of the SSBs.
  • one of the multiple SSBs associated with the RO can be selected to determine the transmission beam of the PRACH when the PRACH is transmitted in the RO
  • the SSB with the smallest or largest index among the multiple SSBs may be selected according to the SSB index, or selected according to the RSRP of the SSB, or randomly selected with equal probability, etc., which are not limited here.
  • the network device does not need to The associated SSB of each RO that transmits multiple PRACHs is used to indicate, thereby reducing the indication overhead; and, although the transmission beams of multiple PRACHs corresponding to one RO group can be different, the association relationship between SSB and RO is determined, so The transmit beam of the PRACH is also determined.
  • the network device can determine its optimal receive beam on each RO according to the transmit beam of the PRACH corresponding to each RO, thereby obtaining beam diversity gain and having better robustness when the terminal moves rapidly. Stickiness.
  • determine multiple PRACH transmission beams for repeated transmission including:
  • the network device receiving first indication information sent by the network device, where the first indication information is used to indicate a predefined rule used to determine multiple PRACH transmission beams for repeated transmission;
  • the transmission beams of the multiple PRACHs for repeated transmission are determined.
  • the network device may send the first indication information to the terminal, indicating which protocol predefined rules the terminal uses when determining the transmission beams of multiple PRACHs that are repeatedly transmitted.
  • the terminal may use the The indication in the first indication information, combined with the rules predefined by the protocol, determines the transmission beams of the multiple PRACHs for repeated transmission.
  • the first indication information may be carried and broadcast by the network device in a system message (such as SIB1).
  • SIB1 system message
  • the network device can send the first indication information to the terminal, indicating which predefined rule the terminal uses when determining multiple PRACH transmission beams for repeated transmission, so that only very few In the case of indicating overhead, the flexibility of using beams when repeatedly sending multiple PRACHs is improved.
  • determining multiple PRACH transmission beams for repeated transmission includes:
  • the transmission beams of the multiple PRACHs for repeated transmission are determined.
  • the network device may send second indication information to the terminal, where the second indication information is used to indicate the SSB associated with the RO in the RO group.
  • the second indication information may include indication information indicating the index of the SSB associated with the RO in the RO group.
  • the second indication information may also indicate the index of the SSB associated with the RO in the RO group by means other than the bitmap, which is not limited here.
  • the second indication information may include indication information indicating an index of an SSB association pattern corresponding to the RO group.
  • the SSB association pattern indicates the SSB pattern (pattern) associated with each RO in the RO group, so the SSB association pattern may indicate the SSB associated with each RO in the RO group.
  • the SSB association style may be predefined, or may be indicated by the network device, for example, indicated by the network device through system information broadcast.
  • the second indication information indicates the indexes of these SSB association patterns.
  • the predefined or network device indicates several SSB association patterns with a length of 4, such as:
  • pattern1 ⁇ SSB0-SSB1-SSB2-SSB3 ⁇ ;
  • pattern2 ⁇ SSB0-SSB3-SSB2-SSB1 ⁇ ;
  • the second indication information may indicate one of these SSB association patterns by indicating the index of the SSB association pattern.
  • an RO group includes 4 ROs.
  • the second indication information indicates pattern2, 4 ROs in the RO group
  • the ROs are respectively associated with SSB0, SSB3, SSB2, and SSB1 in turn.
  • the sending beams of the multiple PRACHs corresponding to the RO group may be determined according to the receiving beams receiving the SSBs.
  • the second indication information may be carried and broadcast by the network device in a system message (such as SIB1).
  • SIB1 system message
  • the network device can send the The second indication information indicates the SSB associated with the RO in the RO group for repeated transmission of multiple PRACHs, so that the terminal can determine the transmission beams of the multiple PRACHs for repeated transmission according to the SSB indicated by the second indication information, and according to the The transmission beam of each PRACH is determined, and multiple PRACHs are repeatedly sent to the network device, which improves the coverage performance of the PRACH; at the same time, the network device can determine its own optimal reception on each RO according to the transmission beam of the PRACH corresponding to each RO beam, so as to obtain beam diversity gain, which has better robustness when the terminal moves rapidly.
  • FIG. 4 is the second schematic flow diagram of the PRACH repeated transmission method provided by the embodiment of the present disclosure.
  • the method can be applied to a network device (such as a base station). As shown in FIG. 4, the method includes the following steps:
  • Step 400 according to predefined rules and/or indication information sent to the terminal, determine the transmission beams of multiple PRACHs for repeated transmission;
  • various embodiments of the present disclosure provide a solution to support repeated transmission of PRACH, wherein the terminal can determine the Multiple PRACH transmission beams for repeated transmission.
  • the network device may determine the transmission beam used by the terminal to repeatedly transmit multiple PRACHs according to predefined rules in the protocol and/or indication information sent to the terminal.
  • a beam is sometimes described as a spatial filter or spatial relation information.
  • an uplink beam when a terminal sends is called an uplink spatial filter, or an uplink beam when a network device sends
  • the downlink beam is called downlink spatial correlation information and so on. Accordingly, similar descriptions may be considered equivalent.
  • Step 401 Receive multiple PRACHs sent by the terminal according to the sending beam.
  • the network device After the network device determines the sending beams of the multiple PRACHs that are repeatedly transmitted, it can receive the multiple PRACHs that are repeatedly sent by the terminal according to the determined sending beams of each PRACH.
  • the network device can determine the transmission beam used by the terminal to repeatedly transmit multiple PRACHs according to the predefined rules of the protocol and/or the indication information sent to the terminal, so that the determined An appropriate detection scheme is selected for the transmission beam of the PRACH, thereby improving the detection performance of the repeatedly transmitted PRACH, thereby improving the PRACH coverage performance.
  • determine multiple PRACH transmission beams for repeated transmission include:
  • the transmission beams of multiple PRACHs for repeated transmission According to the correspondence between the random access channel opportunity RO group and the synchronization signal block SSB used for repeated transmission of multiple PRACHs, determine the transmission beams of multiple PRACHs for repeated transmission; or,
  • the SSB associated with the first RO in the RO group used for repeated transmission of multiple PRACHs determine the transmission beams of the multiple PRACHs for repeated transmission;
  • the sending beams of the multiple PRACHs that are repeatedly transmitted are the same.
  • the network device determines the transmission beams of the multiple PRACHs that are repeatedly transmitted according to the predefined rules of the protocol. If the predefined rules stipulate that the transmission beams of the multiple PRACHs that are repeatedly transmitted are the same, in a possible implementation, the network device can According to the correspondence between the RO group and the SSB used to repeatedly transmit multiple PRACHs, determine the SSB corresponding to one RO group, and then determine the transmission beams of the multiple PRACHs corresponding to the RO group; another possible implementation In this method, the network device may determine the transmission beams of the multiple PRACHs corresponding to the RO group according to the SSB associated with the first RO in the RO group used for repeated transmission of the multiple PRACHs.
  • the correspondence between the RO group and the SSB is indicated by the network device to the terminal, and the network device can determine the SSB corresponding to an RO group according to the correspondence between the RO group and the SSB, such as SSB1, then the terminal can The receive beam receiving the SSB1 is used as the transmit beam of the multiple PRACHs corresponding to the RO group.
  • the existing SSB-to-RO association method can be reused to indicate the SSB associated with the first RO in an RO group, so that the network device can determine the RO according to the SSB associated with the first RO in the RO group, for example, SSB1
  • the SSBs associated with other ROs in the group are the same as the SSBs associated with the first RO in the RO group, that is, they are all SSB1, then the receiving beam that the terminal receives the SSB1 can be used as the corresponding RO group
  • the sending beams of multiple PRACHs, among the multiple PRACHs, the sending beams of other PRACHs except the first PRACH are the same as the sending beams of the first PRACH.
  • the network device does not need to indicate the associated SSB of each RO used for repeated transmission of multiple PRACHs, thereby reducing the indication overhead; and, the network device receives one RO group corresponding
  • the transmission beams of the PRACHs are the same, so the signals can be combined among the ROs of an RO group before proceeding.
  • Line coherent detection is simple to implement and can improve detection performance.
  • determine multiple PRACH transmission beams for repeated transmission including:
  • the transmission beams of the multiple PRACHs for repeated transmission are determined.
  • the network device determines the transmission beams of multiple PRACHs for repeated transmission according to the rules predefined in the protocol, which may be based on the SSB associated with the first RO in the RO group used for repeated transmission of multiple PRACHs, and the SSB actually sent by the network device
  • the corresponding SSB index cyclic sequence determines multiple PRACH transmission beams for repeated transmission.
  • the SSB actually sent by the network device may be, for example, the SSB indicated by the network device by sending the indication information ssb-PositionsInBurst; it may also be one or more SSBs uniquely determined in other ways.
  • the SSB actually sent by the network device includes SSB0, SSB1, SSB2, and SSB3, and the SSB index cyclic sequence corresponding to the SSB actually sent by the network device is 0-1-2-3-0-1-2-3-0- 1...
  • the network device can determine the SSB associated with each RO in the RO group according to the SSB index cyclic sequence and the SSB associated with the first RO in the RO group, and then determine the transmission beams of multiple PRACHs corresponding to the RO group . It can be understood that the sending beams of the multiple PRACHs corresponding to the RO group determined in this manner may be different.
  • the SSB associated with the first RO in the RO group used for repeated transmission of multiple PRACHs and the SSB index cyclic sequence corresponding to the SSB actually sent by the network device, determine the transmission beams of the multiple PRACHs for repeated transmission, including :
  • the index of the SSB associated with the first RO in the RO group is used as the starting index, and each RO corresponds to an SSB, and the ROs in the RO group are sequentially associated with the SSB actually sent by the network device to determine repeated transmission multiple PRACH transmit beams.
  • the SSB index cyclic sequence corresponding to the SSB actually sent by the network device is 0-1-2-3-0-1-2-3-0-1...
  • the RO group The SSB associated with the first RO in the group is SSB1
  • the SSB associated with the first RO is SSB1
  • the SSB associated with the second RO is SSB2
  • the SSB associated with the third RO is SSB3
  • the SSB associated with the fourth RO is SSB0
  • the SSB associated with the fifth RO is SSB1
  • the SSB associated with the sixth RO is SSB2.
  • the transmit beams of the multiple PRACHs corresponding to the RO group can be determined according to the receive beams of the SSBs received by the terminal.
  • the network device does not need to indicate the associated SSB of each RO used for repeated transmission of multiple PRACHs, thereby reducing the indication overhead; and, although multiple PRACHs corresponding to one RO group
  • the transmit beams of the SSB can be different, but the association between the SSB and the RO is determined, so the transmit beam of the PRACH is also determined, and the network device can determine its optimal reception on each RO according to the transmit beam of the PRACH corresponding to each RO. beam, so as to obtain beam diversity gain, which has better robustness when the terminal moves rapidly.
  • the SSB associated with the first RO in the RO group used for repeated transmission of multiple PRACHs and the SSB index cyclic sequence corresponding to the SSB actually sent by the network device, determine the transmission beams of the multiple PRACHs for repeated transmission, including :
  • the SSB index cyclic sequence corresponding to the SSB actually sent by the network device, the number of SSBs actually sent by the network device, and the number of repeated transmissions of the PRACH determine Multiple PRACH transmit beams for repeated transmission.
  • the network device can determine the transmission beams of multiple PRACHs that are repeatedly transmitted according to the rules predefined in the protocol, not only according to the SSB associated with the first RO in the RO group corresponding to the multiple PRACHs, but also according to the actual transmission beam of the network device.
  • the SSB index cyclic sequence corresponding to the SSB, and the number of SSBs actually transmitted by the network device and the number of repeated transmissions of the PRACH are integrated to determine the transmission beams of the multiple PRACHs.
  • the SSB index cyclic sequence corresponding to the SSB actually sent by the network device, the number of SSBs actually sent by the network device, and the repetition of the PRACH determines the transmission beams of multiple PRACHs that are repeatedly transmitted, including:
  • Method 1 According to the SSB index cycle sequence, the index of the SSB associated with the first RO in the RO group is used as the starting index, and the SSB corresponds to the RO one by one, and the ROs in the RO group are sequentially associated with the SSB actually sent by the network device. Determining multiple PRACH transmission beams for repeated transmission, wherein the number of SSBs actually transmitted by the network device is equal to the number of repeated transmissions of the PRACH; or,
  • Method 2 According to the SSB index cyclic sequence, the index of the SSB associated with the first RO in the RO group is used as the starting index, and each SSB corresponds to M/N ROs, and the ROs in the RO group and the SSB actually sent by the network device are calculated Sequence association, determining multiple PRACH transmission beams for repeated transmission, where M is the number of repeated transmissions of PRACH, N is the number of SSBs actually sent by the network device, N is less than or equal to M, and M/N is a positive integer; or,
  • Method 3 According to the SSB index cycle sequence, the index of the SSB associated with the first RO in the RO group is used as the starting index, and the previous Each of the SSBs corresponds to RO, after Each of the SSBs corresponds to The ROs in the RO group are sequentially associated with the SSBs actually sent by the network equipment to determine the transmission beams of multiple PRACHs that are repeatedly transmitted, where M is the number of repeated transmissions of the PRACH, and N is the number of SSBs actually sent by the network equipment number, N is less than or equal to M; or,
  • Method 4 According to the SSB index cyclic sequence, the index of the SSB associated with the first RO in the RO group is used as the starting index, and each RO corresponds to N/M SSBs, and the ROs in the RO group and the SSB actually sent by the network device are calculated Sequential association, determining multiple PRACH transmission beams for repeated transmission, where M is the number of repeated transmissions of PRACH, N is the number of SSBs actually sent by the network device, N is greater than or equal to M, and N/M is a positive integer; or,
  • Method 5 According to the SSB index cycle sequence, the index of the SSB associated with the first RO in the RO group is used as the starting index, and the previous Each RO in each RO corresponds to SSB, after Each RO in each RO corresponds to SSB, sequentially associate the ROs in the RO group with the SSBs actually sent by the network equipment, and determine the transmission beams of multiple PRACHs that are repeatedly transmitted, where M is the number of repeated transmissions of the PRACH, and N is the number of SSBs actually sent by the network equipment Number, N greater than or equal to M.
  • the number of SSBs actually sent by the network device is 4, and the actual number of SSBs sent by the network device is 4.
  • the SSB index cyclic sequence corresponding to the SSB is 0-1-2-3-0-1-2-3-0-1...; assuming that the number of repeated transmissions of the PRACH is 4, that is, the RO group includes 4 ROs,
  • the SSB associated with the first RO in the RO group is SSB1, and it can start from the position where the index is 1 in the index cyclic sequence, and the SSB corresponds to the RO one by one, and sequentially associates the ROs in the RO group with the SSB actually sent by the network device.
  • the SSB associated with each RO in the RO group that is, the SSB associated with the first RO is SSB1, the SSB associated with the second RO is SSB2, the SSB associated with the third RO is SSB3, and the SSB associated with the fourth RO is SSB0.
  • each SSB corresponds to 2 ROs, sequentially associate the ROs in the RO group with the SSBs actually sent by the network device, and determine the SSB associated with each RO in the RO group, that is, the first RO and the second RO
  • the SSBs associated with the two ROs are both SSB1
  • the SSBs associated with the third RO and the fourth RO are both SSB2
  • Each SSB in the first two SSBs corresponds to two ROs, and the last two SSBs (namely SSB3 and SSB0)
  • Each SSB in the SSB corresponds to 1 RO
  • the ROs in the RO group are sequentially associated with the SSBs actually sent by the network device to determine the SSB associated with each RO in the RO group, that is, the SSB associated with the first RO and the second RO.
  • the SSBs are all SSB1, the SSBs associated with the third and fourth ROs are both SSB2, the SSBs associated with the fifth RO are SSB3, and the SSBs associated with the sixth RO are SSB0.
  • the SSB actually sent by the network device is SSB0, SSB1, SSB2 and SSB3, the number of SSBs actually sent by the network device is 4, and the SSB index cycle sequence corresponding to the SSBs actually sent by the network device is 0-1-2-3-0-1-2-3-0-1...
  • the number of repeated transmissions of PRACH is 2, that is, the RO group includes 2 ROs, and the SSB associated with the first RO in the RO group is SSB1, then it can start from the position with index 1 in the index cyclic sequence, and each RO corresponds to 2 SSBs, sequentially associate the ROs in the RO group with the SSBs actually sent by the network device, and determine the SSBs associated with each RO in the RO group, that is, the SSBs associated with the first RO are SSB1 and SSB2, and the SSBs associated with the second RO
  • the SSBs are SSB3 and SSB0.
  • the first RO corresponds to 2 SSBs
  • the last RO i.e. the second RO
  • the ROs are sequentially associated with the SSBs actually sent by the network device, and the SSBs associated with each RO in the RO group are determined, that is, the SSBs associated with the first RO are SSB1 and SSB2, and the SSBs associated with the second RO are SSB0.
  • the transmit beams of the multiple PRACHs corresponding to the RO group can be determined according to the receive beams of the SSBs received by the terminal.
  • one of the multiple SSBs associated with the RO can be selected to determine the transmission beam of the PRACH when the PRACH is transmitted in the RO
  • the SSB with the smallest or largest index among the multiple SSBs may be selected according to the SSB index, or selected according to the RSRP of the SSB, or randomly selected with equal probability, etc., which are not limited here.
  • the network device does not need to indicate the associated SSB of each RO used for repeated transmission of multiple PRACHs, thereby reducing the indication overhead; and, although multiple PRACHs corresponding to one RO group
  • the transmit beams of each RO can be different, but the association between SSB and RO is determined, so the transmit beam of PRACH is also determined, and the network device can determine its optimal connection on each RO according to the transmit beam of PRACH corresponding to each RO. Receive beams to obtain beam diversity gain and have better robustness when the terminal moves quickly.
  • determine multiple PRACH transmission beams for repeated transmission including:
  • the transmission beams of the multiple PRACHs for repeated transmission are determined.
  • the network device may send the first indication information to the terminal, indicating which protocol predefined rules the terminal uses when determining multiple PRACH transmission beams for repeated transmission, so that after the terminal receives the first indication information, it can According to the indication in the first indication information and in combination with the rules predefined in the protocol, the transmission beams of the multiple PRACHs for repeated transmission are determined.
  • the network device may determine the transmission beam used by the terminal to repeatedly transmit multiple PRACHs according to the first indication information sent to the terminal and in combination with rules predefined in the protocol.
  • the first indication information may be carried and broadcast by the network device in a system message (such as SIB1).
  • SIB1 system message
  • the network device can send the first indication information to the terminal, indicating which predefined rule the terminal uses when determining multiple PRACH transmission beams for repeated transmission, so that only very few In the case of indicating overhead, the flexibility of using beams when repeatedly sending multiple PRACHs is improved.
  • determine the transmission beams of multiple PRACHs for repeated transmission including:
  • the transmission beams of the multiple PRACHs for repeated transmission are determined.
  • the network device may send the second indication information to the terminal, where the second indication information is used to indicate the SSB associated with the RO in the RO group, so that after receiving the second indication information, the terminal may, according to the second indication information, The indication in , determine the transmission beams of multiple PRACHs for repeated transmission.
  • the network device may determine that the terminal repeatedly sends the Transmit beams used by multiple PRACHs.
  • the second indication information may include indication information indicating the index of the SSB associated with the RO in the RO group.
  • the second indication information may also indicate the index of the SSB associated with the RO in the RO group by means other than the bitmap, which is not limited here.
  • the second indication information may include indication information indicating an index of an SSB association pattern corresponding to the RO group.
  • the SSB association pattern indicates the SSB pattern (pattern) associated with each RO in the RO group, so the SSB association pattern may indicate the SSB associated with each RO in the RO group.
  • the SSB association style may be predefined, or may be indicated to the terminal by the network device, for example, indicated to the terminal by the network device through system information broadcast.
  • the second indication information indicates the indexes of these SSB association patterns.
  • the predefined or network device indicates several SSB association patterns with a length of 4, such as:
  • pattern1 ⁇ SSB0-SSB1-SSB2-SSB3 ⁇ ;
  • pattern2 ⁇ SSB0-SSB3-SSB2-SSB1 ⁇ ;
  • the second indication information may indicate one of these SSB association patterns by indicating the index of the SSB association pattern.
  • an RO group includes 4 ROs.
  • the second indication information indicates pattern2, 4 ROs in the RO group
  • the ROs are respectively associated with SSB0, SSB3, SSB2, and SSB1 in turn.
  • the second indication information may be carried and broadcast by the network device in a system message (such as SIB1).
  • SIB1 system message
  • the network device can send the The second indication information indicates the SSB associated with the RO in the RO group for repeated transmission of multiple PRACHs, so that the terminal can determine the transmission beams of the multiple PRACHs for repeated transmission according to the SSB indicated by the second indication information, and according to the The transmission beam of each PRACH is determined, and multiple PRACHs are repeatedly sent to the network device, which improves the coverage performance of the PRACH; at the same time, the network device can determine its own optimal reception on each RO according to the transmission beam of the PRACH corresponding to each RO beam, so as to obtain beam diversity gain, which has better robustness when the terminal moves rapidly.
  • the technical solution disclosed in this disclosure can be applied to 5G NR systems, including network equipment and terminals; it can also be applied to other systems, as long as the terminal needs to repeatedly send pilots for initial access.
  • FIG. 5 is a schematic diagram of an application scenario provided by an embodiment of the present disclosure.
  • multiple terminals including Terminal 1 and Terminal 2 initiate random access to a network device to apply for a wireless network connection service;
  • the network device receives the random access request from at least one terminal, and performs wireless service for it.
  • Data interaction and transmission are performed between the network device and Terminal 1 and Terminal 2 through wireless communication.
  • the involved network elements mainly include: network equipment, such as base station, gNB; terminal, such as user equipment, UE.
  • Embodiment 1 This embodiment introduces that the transmission beams of the multiple PRACHs that are repeatedly transmitted are determined in a predefined manner, and the transmission beams of the multiple PRACHs that are repeatedly transmitted are the same.
  • ROs used for repeatedly sending the PRACH are recorded as one RO group.
  • an RO group includes multiple ROs, and these ROs have different time domain resources; and (in a predefined manner) it is stipulated that one RO group corresponds to the same SSB, or the same multiple SSBs; In other words, all ROs in one RO group correspond to the same SSB, or the same multiple SSBs (for example, multiple ROs in one RO group respectively correspond to multiple SSBs, and the multiple SSBs are all SSB1).
  • the corresponding relationship between an RO group and the SSB may be indicated by the network device through SIB1.
  • Another description is to reuse the existing SSB-to-RO association method to indicate the association relationship between the SSB and the "first RO" in an RO group, and (in a predefined way) to stipulate that in an RO group (except The associated SSBs of other ROs other than the first RO are the same as the SSB associated with the first RO.
  • Two The two description methods are essentially equivalent.
  • the terminal From the perspective of beams for sending PRACHs, in one RO group corresponding to the same SSB, the terminal sends PRACHs in each RO, and the uplink beams used by each PRACH are the same.
  • FIG. 6 is one of the implementation schematic diagrams of the PRACH repeated transmission method provided by the embodiment of the present disclosure.
  • RO3-3 and the RO group corresponds to the same SSB (namely SSB1).
  • the terminal selects SSB1, and transmits PRACH in each RO in the RO group; the transmission beams of all PRACHs are the same.
  • the SSBs corresponding to the second to fourth ROs are the same as the SSBs corresponding to the first RO, or the transmission beams of the second to fourth PRACHs are the same as the transmission beams of the first PRACH.
  • FIG. 7 is the second implementation schematic diagram of the PRACH repeated transmission method provided by the embodiment of the present disclosure. As shown in FIG. 7 , it is assumed that one RO group includes 4 ROs are RO3 (the first RO), and RO3-1, RO3-2, and RO3-3, and the frequency domain positions of multiple ROs in the RO group may be different. It should be noted that, each embodiment of the present disclosure does not limit whether frequency domain positions of multiple ROs in one RO group are the same.
  • the beneficial effect of this embodiment is that the network device does not need to indicate the associated SSB of each RO, thereby reducing the indication overhead; and, when the network device receives multiple PRACHs corresponding to one RO group, it can be assumed that the transmission beams of the PRACHs are all It is the same, therefore, it is possible to combine signals among ROs of an RO group first and then perform coherent detection, which is simple to implement and can improve detection performance.
  • Embodiment 2 This embodiment introduces that the transmission beams of multiple PRACHs that are repeatedly transmitted are determined in a predefined manner, and the transmission beams of multiple PRACHs that are repeatedly transmitted may be different.
  • Embodiment 2-1 In the first method in this embodiment, the correspondence between ROs and SSBs in an RO group is determined according to the SSB actually sent by the network device and the SSB corresponding to the first RO.
  • the corresponding relationship between the first RO and SSB in an RO group can be indicated in SIB1 by reusing the existing SSB-to-RO association method; and except for the first RO, other ROs and SSB The corresponding relationship among them is determined according to the SSB corresponding to the first RO and the SSB index cyclic sequence of the SSB actually sent by the network device.
  • the SSB actually sent by the network device includes SSB0, SSB1, SSB2, and SSB3, and its SSB index cyclic sequence is 0-1-2-3-0-1-2-3-0-1...; if an RO group
  • the SSB corresponding to the first RO is SSB1, the SSB corresponding to the second RO is SSB2, the SSB corresponding to the third RO is SSB3, the SSB corresponding to the fourth RO is SSB0, and the SSB corresponding to the fifth RO is SSB1 , and so on.
  • FIG. 8 is the third implementation schematic diagram of the PRACH repeated transmission method provided by the embodiment of the present disclosure.
  • the SSBs actually sent by the network device are SSB0, SSB1, SSB2 and SSB3, and one RO group includes 6 ROs.
  • the SSB index corresponding to the first RO is indicated by the network device, and the SSB index corresponding to other ROs is based on the "SSB index cyclic sequence", starting with "the index of the SSB corresponding to the first RO” and proceeding in sequence
  • the association is determined, that is, the SSB corresponding to RO3 is SSB1, the SSB corresponding to RO3-1 is SSB2, the SSB corresponding to RO3-2 is SSB3, the SSB corresponding to RO3-3 is SSB0, the SSB corresponding to RO3-4 is SSB1, and the SSB corresponding to RO3-4 is SSB1.
  • the corresponding SSB of 5 is SSB2.
  • the beams for sending the PRACH in a certain RO may also be different.
  • the PRACH beams sent in multiple ROs corresponding to the same SSB should still be the same.
  • the PRACH beams sent by the terminal in RO3-1 should be the same as the PRACH beams sent in RO3-5.
  • Embodiment 2-2 In another method in this embodiment, the correspondence between ROs and SSBs in an RO group is based on the SSB actually sent by the network device, the SSB corresponding to the first RO, and the repetition of PRACH The number of transfers is determined.
  • the SSB corresponding to each RO needs to be determined according to the magnitude relationship between the number N of SSBs actually sent by the network device and the number M of repeated transmissions of the PRACH.
  • FIG. 9 is the fourth implementation schematic diagram of the PRACH repeated transmission method provided by the embodiment of the present disclosure. As shown in FIG. 9, the number N of SSBs is equal to 4, and the PRACH The number of repeated transmissions M is equal to 4, and the SSB corresponding to the first RO is indicated by the network device.
  • the method of reusing the existing SSB-to-RO association can be indicated in SIB1; while the corresponding relationship between other ROs and SSBs is based on the SSB index cycle sequence, starting with "the index of the SSB corresponding to the first RO"
  • the index is determined by sequential association (see embodiment 2-1), that is, the SSB corresponding to RO3 is SSB1, the SSB corresponding to RO3-1 is SSB2, the SSB corresponding to RO3-2 is SSB3, and the SSB corresponding to RO3-3 is SSB0 .
  • the number of SSBs is less than the number of ROs/PRACH repeated transmission times; in this case, each SSB corresponds to multiple ROs; the SSB corresponding to the first RO is indicated by the network device and can be repeated Use the existing SSB-to-RO association method to indicate in SIB1; and the corresponding relationship between other ROs and SSBs is based on the SSB index cycle sequence, and start with "the index of the SSB corresponding to the first RO", for sequence association determination, where:
  • FIG. 10 is the fifth implementation schematic diagram of the PRACH repeated transmission method provided by the embodiment of the present disclosure. As shown in FIG.
  • the number N of SSBs is equal to 3, and the number of PRACH repeated transmissions M If it is equal to 6, each SSB corresponds to 2 ROs, and the SSB corresponding to the first RO is indicated by the network device, and the existing SSB-to-RO association method can be reused to indicate in SIB1; while the correspondence between other ROs and SSBs
  • the relationship is determined according to the SSB index cyclic sequence, and the "index of the SSB corresponding to the first RO" is used as the starting index, and the sequential association is determined, that is, the SSB corresponding to RO3 is SSB1, and the SSB corresponding to RO3-1 is SSB1, RO3
  • the SSBs corresponding to -2 and RO3-3 are both SSB2, and the SSBs corresponding to RO3-4 and RO3-5 are both SSB0;
  • FIG. 11 is the sixth implementation schematic diagram of the PRACH repeated transmission method provided by the embodiment of the present disclosure.
  • the number N of SSBs is equal to 4, and the number of PRACH repeated transmissions M If it is equal to 6, each of the first 2 SSBs corresponds to 2 ROs, and each of the last 2 SSBs corresponds to 1 RO.
  • the SSB corresponding to the first RO is indicated by the network device, and the existing SSB-to-RO association can be reused.
  • the method is indicated in SIB1; the corresponding relationship between other ROs and SSBs is determined according to the SSB index cycle sequence, and the "index of the SSB corresponding to the first RO" is used as the starting index for sequential association determination, that is, RO3 corresponds to
  • the SSB of RO3-1 is SSB1
  • the SSB corresponding to RO3-1 is SSB1.
  • the SSBs corresponding to RO3-2 and RO3-3 are both SSB2
  • the SSBs corresponding to RO3-4 are SSB3
  • the SSBs corresponding to RO3-5 are SSB0.
  • the number of SSBs is greater than the number of ROs/PRACH repeated transmission times; in this case, each RO corresponds to multiple SSBs; the SSB corresponding to the first RO is indicated by the network device and can be repeated Use the existing SSB-to-RO association method to indicate in SIB1; the corresponding relationship between other SSBs and ROs is based on the SSB index cycle sequence, and start with "the index of the SSB corresponding to the first RO" as the starting index.
  • the sequence association is determined, where:
  • FIG. 12 is the seventh implementation schematic diagram of the PRACH repeated transmission method provided by the embodiment of the present disclosure. As shown in FIG.
  • the number N of SSBs is equal to 4, and the number of PRACH repeated transmissions M is equal to 2, each RO corresponds to 2 SSBs, the SSB corresponding to the first RO is indicated by the network device, and the existing SSB-to-RO association method can be reused to indicate in SIB1; and the correspondence between other ROs and SSBs , is determined according to the SSB index cycle sequence, and takes "the index of the SSB corresponding to the first RO" as the starting index to determine the sequence association, that is, the SSBs corresponding to RO3 are SSB1 and SSB2, and the SSBs corresponding to RO3-1 are SSB3 and SSB0;
  • FIG. 13 is the eighth implementation schematic diagram of the PRACH repeated transmission method provided by the embodiment of the present disclosure. As shown in FIG. 13, the number N of SSBs is equal to 3, and the number of PRACH repeated transmissions M If it is equal to 2, the first RO corresponds to 2 SSBs, and the last RO corresponds to 1 SSB.
  • the SSB corresponding to the first RO is indicated by the network device, and the existing SSB-to-RO association method can be reused in SIB1
  • the corresponding relationship between other ROs and SSBs is determined according to the SSB index cycle sequence, and the "index of the SSB corresponding to the first RO" is used as the starting index to perform sequential association, that is, the SSB corresponding to RO3 is SSB1
  • the SSB corresponding to SSB2 and RO3-1 is SSB0.
  • the terminal can select one of the corresponding multiple SSBs to determine the uplink beam. For example, the SSB with the smallest or largest index among the multiple SSBs can be selected according to the SSB index, or, according to the SSB The RSRP is selected, and so on.
  • the beneficial effect of this embodiment is that the network device does not need to indicate the associated SSB of each RO, thereby reducing the indication overhead; and, although the transmission beams of multiple PRACHs corresponding to an RO group may be different, the SSB and the RO's
  • the association relationship is definite, so the transmission beam of the PRACH is also definite.
  • the method in this embodiment can enable the network device to determine its optimal receiving beam on each RO according to the transmission beam of the PRACH corresponding to each RO, thereby obtaining Beam diversity gain, which has better robustness when the terminal moves quickly.
  • Embodiment 3 This embodiment introduces the determination of multiple PRACH transmission beams for repeated transmission through (semi-static) signaling indication, and the indication information indicates that one of the methods involved in Embodiment 1 and Embodiment 2 is used .
  • the network device may carry an indication information in the system information (such as SIB1), which is recorded as the first indication information, and the first indication information is used to indicate that when determining the SSB associated with an RO in an RO group, the above-mentioned predefined Which one of the method (such as embodiment 1, embodiment 2-1, embodiment 2-2).
  • SIB1 system information
  • the first indication information is used to indicate that when determining the SSB associated with an RO in an RO group, the above-mentioned predefined Which one of the method (such as embodiment 1, embodiment 2-1, embodiment 2-2).
  • the method for determining the SSB associated with an RO may refer to the content in the above-mentioned Embodiment 1 and Embodiment 2, and details are not repeated here.
  • the network device may instruct the terminal to use the same beam or different beams when repeatedly sending the PRACH according to its own needs. This embodiment improves the flexibility of using beams when repeatedly sending multiple PRACHs while only using very little indication overhead.
  • Embodiment 4 This embodiment introduces that the transmission beams of multiple PRACHs that are repeatedly transmitted are determined through (semi-static) signaling indication, and the indication information is used to indicate the SSBs corresponding to multiple repeated RO/PRACHs.
  • the indication information may be recorded as second indication information.
  • Embodiment 4-1 In the first method of this embodiment, the second indication information is used to directly indicate the SSB associated with each RO (equivalently, the second indication information indicates the uplink beam of the PRACH sent in each RO ).
  • the second indication information may indicate SSBs associated with multiple ROs through a bitmap (Bitmap).
  • Bitmap Each K bit in the Bitmap is used to indicate which of the 2 K SSBs a RO corresponds to.
  • the method in this embodiment indicates the SSBs associated with all ROs in an RO group.
  • the second indication information should include multiple Bitmaps, and each Bitmap corresponds to an RO group; or, the second indication information is a total Bitmap, and the total Bitmap can include multiple sub-Bitmaps, and a sub-Bitmap corresponds to One RO group (for example, the second indication information is a Bitmap with a total of 60 bits, and every 6 bits is a sub-Bitmap, indicating 10 Bitmaps of RO groups in total).
  • the second indication information may also indicate the SSB associated with multiple ROs in other ways, as long as the terminal can determine the corresponding SSB on each RO.
  • Embodiment 4-2 In the second method of this embodiment, the second indication information is used to indicate the association style between the SSB and each RO in the RO group.
  • the association pattern indicates the pattern (pattern) of the SSB associated with each RO of an RO group.
  • a pattern may indicate which SSB each RO is associated with.
  • the association style may be predefined, or may be indicated by the network device through system information broadcast. The second indication information indicates one of these multiple styles.
  • an RO group includes 4 ROs
  • several styles with a length of 4 can be predefined or broadcast, such as:
  • pattern1 ⁇ SSB0-SSB1-SSB2-SSB3 ⁇ ;
  • pattern2 ⁇ SSB0-SSB3-SSB2-SSB1 ⁇ ;
  • the four ROs in one RO group are respectively associated with SSB0, SSB3, SSB2, and SSB1 in sequence. Through this method, the SSB associated with each RO in an RO group can be determined.
  • the second indication information should include multiple style indication information, indicating multiple styles, and each RO group corresponds to a style; or, the second indication information indicates a general style indication information, and the total style
  • the pattern indicated by the instruction information includes several subpatterns, and one subpattern corresponds to one RO group (for example, the pattern indicated by the second instruction information is a pattern with a length of 40, and every 4 lengths is a subpattern, indicating a total of 10 RO groups style).
  • multiple patterns of different lengths may be predefined or broadcast by the network device, and the second indication information indicates one of these patterns.
  • the second indication information indicates one of these patterns.
  • the SSB associated with each RO in an RO group if the length of the RO group (the number of ROs in the RO group) is different from the indicated pattern length, the SSB associated with each RO in an RO group is determined by extending or truncating the indicated pattern.
  • predefined or broadcast notifications with several styles of length 4 such as:
  • pattern1 ⁇ SSB0-SSB1-SSB2-SSB3 ⁇ ;
  • pattern2 ⁇ SSB0-SSB3-SSB2-SSB1 ⁇ ;
  • the second indication information indicates pattern2, if an RO group includes 3 ROs, then the 3 ROs in the RO group can be associated with SSB0, SSB3, and SSB2 respectively (in a truncated manner, only the first 3 SSBs are used for association); If an RO group includes 6 ROs, the 6 ROs in the RO group can be associated with SSB0, SSB3, SSB2, SSB1, SSB0, and SSB3 in turn (in an extended manner, 6 SSBs are obtained through cyclic extension for association).
  • Embodiments 4-1 and 4-2 can also be combined with the existing SSB-to-RO association method.
  • the existing SSB-to-RO association method is only used to indicate the association relationship between the first RO and SSB, while the method in this embodiment is only used to indicate the association relationship between the second, third...RO and SSB .
  • the second indication information in this embodiment is still used to indicate the SSB associated with all ROs (including the first RO), but the SSB associated with the first RO indicated by the second indication information needs to be consistent with the existing SSB-to-RO
  • the SSB associated with the first RO indicated by the association method is the same.
  • FIG. 14 is a schematic structural diagram of a terminal provided by an embodiment of the present disclosure.
  • the terminal includes a memory 1420, a transceiver 1410, and a processor 1400; wherein, the processor 1400 and the memory 1420 may also be arranged physically separately.
  • the memory 1420 is used to store computer programs; the transceiver 1410 is used to send and receive data under the control of the processor 1400 .
  • the transceiver 1410 is used to receive and transmit data under the control of the processor 1400 .
  • the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors represented by the processor 1400 and various circuits of the memory represented by the memory 1420 are linked together.
  • the bus architecture can also link together various other circuits such as peripherals, voltage regulators, and power management circuits, etc., which are well known in the art and thus will not be further described in this disclosure.
  • the bus interface provides the interface.
  • Transceiver 1410 may be a plurality of elements, including a transmitter and a receiver, providing a unit for communicating with various other devices over transmission media, including wireless channels, wired channels, optical cables, and other transmission media.
  • the user interface 1430 may also be an interface capable of connecting externally and internally to required devices, and the connected devices include but not limited to keypads, displays, speakers, microphones, joysticks, and the like.
  • the processor 1400 is responsible for managing the bus architecture and general processing, and the memory 1420 can store data used by the processor 1400 when performing operations.
  • the processor 1400 may be a central processing unit (Central Processing Unit, CPU), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), a field programmable gate array (Field-Programmable Gate Array, FPGA) or a complex programmable logic device (Complex Programmable Logic Device, CPLD), the processor can also adopt a multi-core architecture.
  • CPU Central Processing Unit
  • ASIC Application Specific Integrated Circuit
  • FPGA Field-Programmable Gate Array
  • CPLD Complex Programmable Logic Device
  • the processor 1400 calls the computer program stored in the memory 1420 to execute any of the methods provided in the embodiments of the present disclosure according to the obtained executable instructions, for example: according to predefined rules and/or instruction information sent by the network device, Determine the sending beams of the multiple PRACHs that are repeatedly transmitted; and send the multiple PRACHs to the network device according to the sending beams.
  • determine multiple PRACH transmission beams for repeated transmission including:
  • the transmission beams of multiple PRACHs for repeated transmission According to the correspondence between the random access channel opportunity RO group and the synchronization signal block SSB used for repeated transmission of multiple PRACHs, determine the transmission beams of multiple PRACHs for repeated transmission; or,
  • the SSB associated with the first RO in the RO group used for repeated transmission of multiple PRACHs determine the transmission beams of the multiple PRACHs for repeated transmission;
  • the sending beams of the multiple PRACHs that are repeatedly transmitted are the same.
  • determine multiple PRACH transmission beams for repeated transmission including:
  • the transmission beams of the multiple PRACHs for repeated transmission are determined.
  • the SSB associated with the first RO in the RO group used for repeated transmission of multiple PRACHs and the SSB index cyclic sequence corresponding to the SSB actually sent by the network device, determine the transmission beams of the multiple PRACHs for repeated transmission, including :
  • the index of the SSB associated with the first RO in the RO group is used as the starting index, and each RO corresponds to an SSB, and the ROs in the RO group are sequentially associated with the SSB actually sent by the network device to determine repeated transmission multiple PRACH transmit beams.
  • the SSB associated with the first RO in the RO group used for repeated transmission of multiple PRACHs and the SSB index cyclic sequence corresponding to the SSB actually sent by the network device, determine the transmission beams of the multiple PRACHs for repeated transmission, including :
  • the SSB index cyclic sequence corresponding to the SSB actually sent by the network device, and the SSB actually sent by the network device and the number of repeated transmissions of the PRACHs determine the transmission beams of the multiple PRACHs for repeated transmissions.
  • the SSB index cyclic sequence corresponding to the SSB actually sent by the network device, the number of SSBs actually sent by the network device, and the repetition of the PRACH determines the transmission beams of multiple PRACHs that are repeatedly transmitted, including:
  • the index of the SSB associated with the first RO in the RO group is used as the starting index, and the SSB corresponds to the RO one by one, and the ROs in the RO group are sequentially associated with the SSB actually sent by the network device to determine repeated transmission multiple PRACH transmission beams, wherein the number of SSBs actually transmitted by the network device is equal to the number of repeated transmissions of the PRACH; or,
  • the index of the SSB associated with the first RO in the RO group is used as the starting index, and each SSB corresponds to M/N ROs, and the ROs in the RO group are sequentially associated with the SSBs actually sent by the network device.
  • M is the number of repeated transmissions of the PRACH
  • N is the number of SSBs actually sent by the network device
  • N is less than or equal to M
  • M/N is a positive integer
  • the index of the SSB associated with the first RO in the RO group is used as the starting index.
  • Each of the SSBs corresponds to RO, after Each of the SSBs corresponds to
  • the ROs in the RO group are sequentially associated with the SSBs actually sent by the network equipment to determine the transmission beams of multiple PRACHs that are repeatedly transmitted, where M is the number of repeated transmissions of the PRACH, and N is the number of SSBs actually sent by the network equipment number, N is less than or equal to M; or,
  • the index of the SSB associated with the first RO in the RO group is used as the starting index, each RO corresponds to N/M SSBs, and the ROs in the RO group are sequentially associated with the SSBs actually sent by the network device.
  • M is the number of repeated transmissions of the PRACH
  • N is the number of SSBs actually sent by the network device
  • N is greater than or equal to M
  • N/M is a positive integer
  • the index of the SSB associated with the first RO in the RO group is used as the starting index.
  • Each RO in each RO corresponds to SSB, after Each RO in each RO corresponds to SSB, sequentially associate the ROs in the RO group with the SSBs actually sent by the network equipment, and determine the transmission beams of multiple PRACHs that are repeatedly transmitted, where M is the number of repeated transmissions of the PRACH, and N is the number of SSBs actually sent by the network equipment Number, N greater than or equal to M.
  • determine multiple PRACH transmission beams for repeated transmission including:
  • the network device receiving first indication information sent by the network device, where the first indication information is used to indicate a predefined rule used to determine multiple PRACH transmission beams for repeated transmission;
  • the transmission beams of the multiple PRACHs for repeated transmission are determined.
  • determining multiple PRACH transmission beams for repeated transmission includes:
  • the transmission beams of the multiple PRACHs for repeated transmission are determined.
  • the second indication information includes indication information indicating the index of the SSB associated with the RO in the RO group; or,
  • the second indication information includes indication information indicating the index of the SSB association style corresponding to the RO group, where the SSB association style is predefined or indicated by the network device.
  • FIG. 15 is a schematic structural diagram of a network device provided by an embodiment of the present disclosure.
  • the network device includes a memory 1520, a transceiver 1510, and a processor 1500; wherein, the processor 1500 and the memory 1520 can also be arranged physically separately .
  • the memory 1520 is used to store computer programs; the transceiver 1510 is used to send and receive data under the control of the processor 1500 .
  • the transceiver 1510 is used to receive and transmit data under the control of the processor 1500 .
  • the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors represented by the processor 1500 and various circuits of the memory represented by the memory 1520 are linked together.
  • the bus architecture can also integrate devices such as peripherals, voltage regulators, and power management circuits and so on are linked together, which are well known in the art, and thus will not be further described in this disclosure.
  • the bus interface provides the interface.
  • Transceiver 1510 may be a plurality of elements, including a transmitter and a receiver, providing a unit for communicating with various other devices over transmission media, including wireless channels, wired channels, optical cables, and other transmission media.
  • the processor 1500 is responsible for managing the bus architecture and general processing, and the memory 1520 can store data used by the processor 1500 when performing operations.
  • the processor 1500 may be a CPU, ASIC, FPGA or CPLD, and the processor may also adopt a multi-core architecture.
  • the processor 1500 calls the computer program stored in the memory 1520 to execute any of the methods provided in the embodiments of the present disclosure according to the obtained executable instructions, for example: according to predefined rules and/or instruction information sent to the terminal, Determine the sending beams of the multiple PRACHs that are repeatedly transmitted; and receive the multiple PRACHs sent by the terminal according to the sending beams.
  • determine multiple PRACH transmission beams for repeated transmission including:
  • the transmission beams of multiple PRACHs for repeated transmission According to the correspondence between the random access channel opportunity RO group and the synchronization signal block SSB used for repeated transmission of multiple PRACHs, determine the transmission beams of multiple PRACHs for repeated transmission; or,
  • the SSB associated with the first RO in the RO group used for repeated transmission of multiple PRACHs determine the transmission beams of the multiple PRACHs for repeated transmission;
  • the sending beams of the multiple PRACHs that are repeatedly transmitted are the same.
  • determine multiple PRACH transmission beams for repeated transmission including:
  • the transmission beams of the multiple PRACHs for repeated transmission are determined.
  • the SSB associated with the first RO in the RO group used for repeated transmission of multiple PRACHs and the SSB index cyclic sequence corresponding to the SSB actually sent by the network device, determine the transmission beams of the multiple PRACHs for repeated transmission, including :
  • each RO corresponds to an SSB, sequentially associate the ROs in the RO group with the SSBs actually sent by the network device, and determine the transmission beams of multiple PRACHs that are repeatedly transmitted.
  • the SSB associated with the first RO in the RO group used for repeated transmission of multiple PRACHs and the SSB index cyclic sequence corresponding to the SSB actually sent by the network device, determine the transmission beams of the multiple PRACHs for repeated transmission, including :
  • the SSB index cyclic sequence corresponding to the SSB actually sent by the network device, the number of SSBs actually sent by the network device, and the number of repeated transmissions of the PRACH determine Multiple PRACH transmit beams for repeated transmission.
  • the SSB index cyclic sequence corresponding to the SSB actually sent by the network device, the number of SSBs actually sent by the network device, and the repetition of the PRACH determines the transmission beams of multiple PRACHs that are repeatedly transmitted, including:
  • the index of the SSB associated with the first RO in the RO group is used as the starting index, and the SSB corresponds to the RO one by one, and the ROs in the RO group are sequentially associated with the SSB actually sent by the network device to determine repeated transmission multiple PRACH transmission beams, wherein the number of SSBs actually transmitted by the network device is equal to the number of repeated transmissions of the PRACH; or,
  • the index of the SSB associated with the first RO in the RO group is used as the starting index, and each SSB corresponds to M/N ROs, and the ROs in the RO group are sequentially associated with the SSBs actually sent by the network device.
  • M is the number of repeated transmissions of the PRACH
  • N is the number of SSBs actually sent by the network device
  • N is less than or equal to M
  • M/N is a positive integer
  • the index of the SSB associated with the first RO in the RO group is used as the starting index.
  • Each of the SSBs corresponds to RO, after Each of the SSBs corresponds to
  • the ROs in the RO group are sequentially associated with the SSBs actually sent by the network equipment to determine the transmission beams of multiple PRACHs that are repeatedly transmitted, where M is the number of repeated transmissions of the PRACH, and N is the number of SSBs actually sent by the network equipment number, N is less than or equal to M; or,
  • the index of the SSB associated with the first RO in the RO group is used as the starting index, each RO corresponds to N/M SSBs, and the ROs in the RO group are sequentially associated with the SSBs actually sent by the network device.
  • M is the number of repeated transmissions of the PRACH
  • N is the number of SSBs actually sent by the network device
  • N is greater than or equal to M
  • N/M is a positive integer
  • the index of the SSB associated with the first RO in the RO group is used as the starting index.
  • Each RO in each RO corresponds to SSB, after Each RO in each RO corresponds to SSB, sequentially associate the ROs in the RO group with the SSBs actually sent by the network equipment, and determine the transmission beams of multiple PRACHs that are repeatedly transmitted, where M is the number of repeated transmissions of the PRACH, and N is the number of SSBs actually sent by the network equipment Number, N greater than or equal to M.
  • determine multiple PRACH transmission beams for repeated transmission including:
  • the transmission beams of the multiple PRACHs for repeated transmission are determined.
  • determine the transmission beams of multiple PRACHs for repeated transmission including:
  • the transmission beams of the multiple PRACHs for repeated transmission are determined.
  • the second indication information includes indication information indicating the index of the SSB associated with the RO in the RO group; or,
  • the second indication information includes indication information indicating an index of an SSB association style corresponding to the RO group, where the SSB association style is predefined or indicated to the terminal by the network device.
  • FIG. 16 is one of the schematic structural diagrams of a PRACH repeated transmission device provided by an embodiment of the present disclosure.
  • the device can be applied to a terminal. As shown in FIG. 16 , the device includes:
  • the first determining unit 1600 is configured to determine multiple PRACH transmission beams for repeated transmission according to predefined rules and/or indication information sent by the network device;
  • the sending unit 1610 is configured to send multiple PRACHs to the network device according to the sending beam.
  • determine multiple PRACH transmission beams for repeated transmission including:
  • the transmission beams of multiple PRACHs for repeated transmission According to the correspondence between the random access channel opportunity RO group and the synchronization signal block SSB used for repeated transmission of multiple PRACHs, determine the transmission beams of multiple PRACHs for repeated transmission; or,
  • the SSB associated with the first RO in the RO group used for repeated transmission of multiple PRACHs determine the transmission beams of the multiple PRACHs for repeated transmission;
  • the sending beams of the multiple PRACHs that are repeatedly transmitted are the same.
  • determine multiple PRACH transmission beams for repeated transmission including:
  • the transmission beams of the multiple PRACHs for repeated transmission are determined.
  • the SSB associated with the first RO in the RO group used for repeated transmission of multiple PRACHs and the SSB index cyclic sequence corresponding to the SSB actually sent by the network device, determine the transmission beams of the multiple PRACHs for repeated transmission, including :
  • the index of the SSB associated with the first RO in the RO group is used as the starting index, and each RO corresponds to an SSB, and the ROs in the RO group are sequentially associated with the SSB actually sent by the network device to determine repeated transmission multiple PRACH transmit beams.
  • the SSB associated with the first RO in the RO group used for repeated transmission of multiple PRACHs and the SSB index cyclic sequence corresponding to the SSB actually sent by the network device, determine the transmission beams of the multiple PRACHs for repeated transmission, including :
  • the SSB index cyclic sequence corresponding to the SSB actually sent by the device, the number of SSBs actually sent by the network device, and the number of repeated transmissions of the PRACH determine the transmission beams of multiple PRACHs that are repeatedly transmitted.
  • the SSB index cyclic sequence corresponding to the SSB actually sent by the network device, the number of SSBs actually sent by the network device, and the repetition of the PRACH determines the transmission beams of multiple PRACHs that are repeatedly transmitted, including:
  • the index of the SSB associated with the first RO in the RO group is used as the starting index, and the SSB corresponds to the RO one by one, and the ROs in the RO group are sequentially associated with the SSB actually sent by the network device to determine repeated transmission multiple PRACH transmission beams, wherein the number of SSBs actually transmitted by the network device is equal to the number of repeated transmissions of the PRACH; or,
  • the index of the SSB associated with the first RO in the RO group is used as the starting index, and each SSB corresponds to M/N ROs, and the ROs in the RO group are sequentially associated with the SSBs actually sent by the network device.
  • M is the number of repeated transmissions of the PRACH
  • N is the number of SSBs actually sent by the network device
  • N is less than or equal to M
  • M/N is a positive integer
  • the index of the SSB associated with the first RO in the RO group is used as the starting index.
  • Each of the SSBs corresponds to RO, after Each of the SSBs corresponds to
  • the ROs in the RO group are sequentially associated with the SSBs actually sent by the network equipment to determine the transmission beams of multiple PRACHs that are repeatedly transmitted, where M is the number of repeated transmissions of the PRACH, and N is the number of SSBs actually sent by the network equipment number, N is less than or equal to M; or,
  • the index of the SSB associated with the first RO in the RO group is used as the starting index, each RO corresponds to N/M SSBs, and the ROs in the RO group are sequentially associated with the SSBs actually sent by the network device.
  • M is the number of repeated transmissions of the PRACH
  • N is the number of SSBs actually sent by the network device
  • N is greater than or equal to M
  • N/M is a positive integer
  • Loop sequence according to SSB index, starting with the index of the SSB associated with the first RO in the RO group index, front Each RO in each RO corresponds to SSB, after Each RO in each RO corresponds to SSB, sequentially associate the ROs in the RO group with the SSBs actually sent by the network equipment, and determine the transmission beams of multiple PRACHs that are repeatedly transmitted, where M is the number of repeated transmissions of the PRACH, and N is the number of SSBs actually sent by the network equipment Number, N greater than or equal to M.
  • determine multiple PRACH transmission beams for repeated transmission including:
  • the network device receiving first indication information sent by the network device, where the first indication information is used to indicate a predefined rule used to determine multiple PRACH transmission beams for repeated transmission;
  • the transmission beams of the multiple PRACHs for repeated transmission are determined.
  • determining multiple PRACH transmission beams for repeated transmission includes:
  • the transmission beams of the multiple PRACHs for repeated transmission are determined.
  • the second indication information includes indication information indicating the index of the SSB associated with the RO in the RO group; or,
  • the second indication information includes indication information indicating the index of the SSB association style corresponding to the RO group, where the SSB association style is predefined or indicated by the network device.
  • FIG. 17 is the second structural schematic diagram of the PRACH repeated transmission device provided by the embodiment of the present disclosure.
  • the device can be applied to network equipment. As shown in FIG. 17 , the device includes:
  • the second determination unit 1700 is configured to determine the transmission beams of multiple PRACHs for repeated transmission according to predefined rules and/or indication information sent to the terminal;
  • the receiving unit 1710 is configured to receive multiple PRACHs sent by the terminal according to the sending beam.
  • determine multiple PRACH transmission beams for repeated transmission including:
  • the RO group and the synchronization signal determines the transmission beams of multiple PRACHs for repeated transmission;
  • the SSB associated with the first RO in the RO group used for repeated transmission of multiple PRACHs determine the transmission beams of the multiple PRACHs for repeated transmission;
  • the sending beams of the multiple PRACHs that are repeatedly transmitted are the same.
  • determine multiple PRACH transmission beams for repeated transmission including:
  • the transmission beams of the multiple PRACHs for repeated transmission are determined.
  • the SSB associated with the first RO in the RO group used for repeated transmission of multiple PRACHs and the SSB index cyclic sequence corresponding to the SSB actually sent by the network device, determine the transmission beams of the multiple PRACHs for repeated transmission, including :
  • the index of the SSB associated with the first RO in the RO group is used as the starting index, and each RO corresponds to an SSB, and the ROs in the RO group are sequentially associated with the SSB actually sent by the network device to determine repeated transmission multiple PRACH transmit beams.
  • the SSB associated with the first RO in the RO group used for repeated transmission of multiple PRACHs and the SSB index cyclic sequence corresponding to the SSB actually sent by the network device, determine the transmission beams of the multiple PRACHs for repeated transmission, including :
  • the SSB index cyclic sequence corresponding to the SSB actually sent by the network device, the number of SSBs actually sent by the network device, and the number of repeated transmissions of the PRACH determine Multiple PRACH transmit beams for repeated transmission.
  • the SSB index cyclic sequence corresponding to the SSB actually sent by the network device, the number of SSBs actually sent by the network device, and the repetition of the PRACH determines the transmission beams of multiple PRACHs that are repeatedly transmitted, including:
  • the index of the SSB associated with the first RO in the RO group is used as the starting index, and the SSB corresponds to the RO one by one, and the RO in the RO group and the SSB actually sent by the network device Perform sequential association to determine multiple PRACH transmission beams for repeated transmission, wherein the number of SSBs actually transmitted by the network device is equal to the number of repeated transmissions of the PRACH; or,
  • the index of the SSB associated with the first RO in the RO group is used as the starting index, and each SSB corresponds to M/N ROs, and the ROs in the RO group are sequentially associated with the SSBs actually sent by the network device.
  • M is the number of repeated transmissions of the PRACH
  • N is the number of SSBs actually sent by the network device
  • N is less than or equal to M
  • M/N is a positive integer
  • the index of the SSB associated with the first RO in the RO group is used as the starting index.
  • Each of the SSBs corresponds to RO, after Each of the SSBs corresponds to
  • the ROs in the RO group are sequentially associated with the SSBs actually sent by the network equipment to determine the transmission beams of multiple PRACHs that are repeatedly transmitted, where M is the number of repeated transmissions of the PRACH, and N is the number of SSBs actually sent by the network equipment number, N is less than or equal to M; or,
  • the index of the SSB associated with the first RO in the RO group is used as the starting index, each RO corresponds to N/M SSBs, and the ROs in the RO group are sequentially associated with the SSBs actually sent by the network device.
  • M is the number of repeated transmissions of the PRACH
  • N is the number of SSBs actually sent by the network device
  • N is greater than or equal to M
  • N/M is a positive integer
  • the index of the SSB associated with the first RO in the RO group is used as the starting index.
  • Each RO in each RO corresponds to SSB, after Each RO in each RO corresponds to SSB, sequentially associate the ROs in the RO group with the SSBs actually sent by the network equipment, and determine the transmission beams of multiple PRACHs that are repeatedly transmitted, where M is the number of repeated transmissions of the PRACH, and N is the number of SSBs actually sent by the network equipment Number, N greater than or equal to M.
  • determine multiple PRACH transmission beams for repeated transmission including:
  • the transmission beams of the multiple PRACHs for repeated transmission are determined.
  • determine the transmission beams of multiple PRACHs for repeated transmission including:
  • the transmission beams of the multiple PRACHs for repeated transmission are determined.
  • the second indication information includes indication information indicating the index of the SSB associated with the RO in the RO group; or,
  • the second indication information includes indication information indicating an index of an SSB association style corresponding to the RO group, where the SSB association style is predefined or indicated to the terminal by the network device.
  • each functional unit in each embodiment of the present disclosure may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit.
  • the above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.
  • the integrated unit is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a processor-readable storage medium.
  • the technical solution of the present disclosure is essentially or part of the contribution to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , including several instructions to make a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) execute all or part of the steps of the methods described in various embodiments of the present disclosure.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disc and other media that can store program codes. .
  • the embodiments of the present disclosure further provide a computer-readable storage medium, where the computer-readable storage medium stores a computer program, and the computer program is used to make a computer execute the PRACH repeated transmission method provided by the foregoing embodiments.
  • the computer-readable storage medium can be any available medium or data storage device that can be accessed by a computer, including but not limited to magnetic storage (such as floppy disk, hard disk, magnetic tape, magneto-optical disk (MO), etc.), optical storage (such as CD, DVD, BD, HVD, etc.), and semiconductor memory (such as ROM, EPROM, EEPROM, non-volatile memory (NAND FLASH), solid-state drive (SSD)), etc.
  • magnetic storage such as floppy disk, hard disk, magnetic tape, magneto-optical disk (MO), etc.
  • optical storage such as CD, DVD, BD, HVD, etc.
  • semiconductor memory such as ROM, EPROM, EEPROM, non-volatile memory (NAND FLASH), solid-state drive (SSD)
  • the applicable system may be a global system of mobile communication (GSM) system, a code division multiple access (CDMA) system, a wideband code division multiple access (WCDMA) general packet Wireless business (general packet radio service, GPRS) system, long term evolution (long term evolution, LTE) system, LTE frequency division duplex (frequency division duplex, FDD) system, LTE time division duplex (time division duplex, TDD) system, Long term evolution advanced (LTE-A) system, universal mobile telecommunications system (UMTS), worldwide interoperability for microwave access (WiMAX) system, 5G new air interface (New Radio, NR) system, etc.
  • GSM global system of mobile communication
  • CDMA code division multiple access
  • WCDMA wideband code division multiple access
  • GPRS general packet Wireless business
  • long term evolution long term evolution
  • LTE long term evolution
  • LTE frequency division duplex frequency division duplex
  • FDD frequency division duplex
  • TDD time division duplex
  • LTE-A Long term evolution advanced
  • the terminal involved in the embodiments of the present disclosure may be a device that provides voice and/or data connectivity to a user, a handheld device with a wireless connection function, or other processing devices connected to a wireless modem.
  • the name of the terminal may be different.
  • the terminal may be called a user equipment (User Equipment, UE).
  • the wireless terminal equipment can communicate with one or more core networks (Core Network, CN) via the radio access network (Radio Access Network, RAN)
  • core networks Core Network, CN
  • Radio Access Network, RAN Radio Access Network
  • wireless terminal equipment can be mobile terminal equipment, such as mobile phones (or called "cellular" phones) and computers with mobile terminal equipment, for example, can be portable, pocket, handheld, computer built-in or vehicle-mounted Mobile devices that exchange speech and/or data with the radio access network.
  • Wireless terminal equipment may also be called system, subscriber unit, subscriber station, mobile station, mobile station, remote station, access point , a remote terminal (remote terminal), an access terminal (access terminal), a user terminal (user terminal), a user agent (user agent), and a user device (user device), which are not limited in the embodiments of the present disclosure.
  • the network device involved in the embodiments of the present disclosure may be a base station, and the base station may include multiple cells that provide services for terminals.
  • the base station can also be called an access point, or it can be a device in the access network that communicates with the wireless terminal device through one or more sectors on the air interface, or other names.
  • the network device can be used to interchange received over-the-air frames with Internet Protocol (IP) packets and act as a router between the wireless terminal device and the rest of the access network, which can include the Internet Protocol (IP) communication network.
  • IP Internet Protocol
  • Network devices may also coordinate attribute management for the air interface.
  • the network device involved in the embodiment of the present disclosure may be a network device (Base Transceiver Station, BTS) in Global System for Mobile communications (GSM) or Code Division Multiple Access (Code Division Multiple Access, CDMA). ), it can also be a network device (NodeB) in Wide-band Code Division Multiple Access (WCDMA), or it can be an evolved network device in a long term evolution (long term evolution, LTE) system (evolutional Node B, eNB or e-NodeB), 5G base station (gNB) in the 5G network architecture (next generation system), can also be a home evolved Node B (HeNB), relay node (relay node) , a home base station (femto), a pico base station (pico), etc., are not limited in this embodiment of the present disclosure.
  • network devices may include centralized unit (centralized unit, CU) nodes and distributed unit (distributed unit, DU) nodes, and the centralized unit and distributed unit may also be
  • MIMO transmission can be Single User MIMO (Single User MIMO, SU-MIMO) or Multi-User MIMO (Multiple User MIMO, MU-MIMO).
  • MIMO transmission can be 2D-MIMO, 3D-MIMO, FD-MIMO, or massive-MIMO, or diversity transmission, precoding transmission, or beamforming transmission, etc.
  • the embodiments of the present disclosure may be provided as methods, systems, or computer program products. Accordingly, the present disclosure can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present disclosure may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, optical storage, etc.) having computer-usable program code embodied therein.
  • processor-executable instructions may also be stored in a processor-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, such that the instructions stored in the processor-readable memory produce a manufacturing product, the instruction device realizes the functions specified in one or more procedures of the flow chart and/or one or more blocks of the block diagram.
  • processor-executable instructions can also be loaded onto a computer or other programmable data processing device, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented
  • the executed instructions provide steps for implementing the functions specified in the procedure or procedures of the flowchart and/or the block or blocks of the block diagrams.

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Abstract

Les modes de réalisation de la présente divulgation concernent un procédé, un dispositif et un appareil de transmission répétée de PRACH, et un support de stockage, qui sont appliqués à un terminal. Le procédé comprend les étapes suivantes : détermination, selon une règle prédéfinie et/ou des informations d'indication qui sont envoyées par un dispositif de réseau, de faisceaux d'envoi d'une pluralité de PRACH qui sont transmis de manière répétée ; et envoi de la pluralité de PRACH au dispositif de réseau selon les faisceaux d'envoi. Au moyen du procédé, du dispositif et de l'appareil de transmission répétée de PRACH, et du support de stockage fournis dans les modes de réalisation de la présente divulgation, un terminal peut déterminer, selon une règle qui est prédéfinie par un protocole et/ou des informations d'indication qui sont envoyées par un dispositif de réseau, des faisceaux d'envoi d'une pluralité de PRACH qui sont transmis de manière répétée, de sorte que la pluralité de PRACH puisse être envoyée de manière répétée au dispositif de réseau selon les faisceaux d'envoi déterminés des PRACH, ce qui permet d'améliorer les performances de couverture des PRACH.
PCT/CN2023/072815 2022-02-18 2023-01-18 Procédé, dispositif et appareil de transmission répétée de prach, et support de stockage WO2023155653A1 (fr)

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CN202210153459.XA CN116669216A (zh) 2022-02-18 2022-02-18 Prach重复传输方法、设备、装置及存储介质

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QUALCOMM INCORPORATED: "Multi-beam RACH procedure aspects", 3GPP DRAFT; R1-1610165_MULTI-BEAM RACH PROCEDURE ASPECTS, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. Lisbon, Portugal; 20161010 - 20161014, 9 October 2016 (2016-10-09), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , XP051150186 *

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