WO2023020542A1 - 随机接入的方法和装置 - Google Patents

随机接入的方法和装置 Download PDF

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Publication number
WO2023020542A1
WO2023020542A1 PCT/CN2022/113069 CN2022113069W WO2023020542A1 WO 2023020542 A1 WO2023020542 A1 WO 2023020542A1 CN 2022113069 W CN2022113069 W CN 2022113069W WO 2023020542 A1 WO2023020542 A1 WO 2023020542A1
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WIPO (PCT)
Prior art keywords
random access
message
terminal device
group
access preamble
Prior art date
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PCT/CN2022/113069
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English (en)
French (fr)
Inventor
颜矛
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to AU2022330226A priority Critical patent/AU2022330226A1/en
Priority to EP22857853.0A priority patent/EP4362594A1/en
Publication of WO2023020542A1 publication Critical patent/WO2023020542A1/zh
Priority to US18/426,230 priority patent/US20240196442A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H04B17/318—Received signal strength
    • H04B17/328—Reference signal received power [RSRP]; Reference signal received quality [RSRQ]
    • 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
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver

Definitions

  • the present application relates to the communication field, and more specifically, to a method and device for random access.
  • Msg3 message 3
  • the present application provides a random access method and device, so that the terminal device can determine the random access preamble according to the sending method of the message 3, so that the network device can reasonably schedule resources according to the sending method of the message 3.
  • a method for random access includes: a terminal device determines a first random access preamble group in at least two random access preamble groups, and the at least two random access preamble groups and the message 3, the message 3 is used for random access, and the sending method of the message 3 includes: the terminal device repeatedly sends the message 3, or the terminal device does not repeatedly send the message 3, and the at least two random access At least one random access preamble group in the incoming preamble group is associated with the terminal device repeatedly sending the message 3; the terminal device determines the random access preamble in the first random access preamble group; the terminal device sends the network device the random access preamble.
  • the terminal device repeatedly sends the message 3, including one or more of the following situations: the terminal device wishes to repeatedly send the message 3, the terminal device has the ability to repeatedly send the message 3, and the terminal device needs to repeatedly send the message 3.
  • the terminal device wishes to be scheduled to send the message 3 repeatedly. The number of times the terminal device sends the message 3 is greater than 1 time.
  • the terminal device does not repeatedly send the message 3, including one or more of the following situations: the terminal device does not have the ability to repeatedly send the message 3, the terminal device does not need to repeatedly send the message 3, and the terminal device does not want to repeatedly send The message 3, the terminal device does not want to be scheduled to repeatedly send the message 3, and the number of times the terminal device sends the message 3 is less than or equal to 1 time.
  • the terminal device determines a first random access preamble group in at least two random access preamble groups, and the at least two random access preamble groups are the same as at least one of the following There are two methods associated: the terminal device repeatedly sends the message 3, the terminal device does not repeatedly send the message 3, the number of times the terminal device sends the message 3, the terminal device has the ability to repeatedly send the message 3, and the terminal device does not have the ability to repeatedly send the message 3 3, the terminal device needs to send the message repeatedly 3, the terminal device does not need to send the message repeatedly 3, the terminal device wants to be scheduled to send the message repeatedly 3, the terminal device does not want to be scheduled to send the message repeatedly 3, the at least two At least one random access preamble group in the random access preamble group is associated with the sending mode in which the terminal device repeatedly sends the message 3; the terminal device determines the random access preamble in the first random access preamble group.
  • the terminal device may select at least two random access preamble packets after selecting the synchronization signal block.
  • the terminal device selects a random access preamble group from at least two random access preamble groups, wherein at least one random access preamble group of the at least two random access preamble groups is the same as the message 3 repeatedly sent by the terminal device
  • the transmission mode is associated, or in other words, at least one random access preamble among the at least two random access preambles is used to indicate the repeated transmission of message 3. Therefore, after the terminal device selects the random access preamble, the subsequent In the process of random access, the network device can determine whether message 3 needs to be sent repeatedly according to the random access preamble, or in other words, the network device can determine the sending method of message 3 according to the random access preamble. Therefore, the network device can According to whether the message 3 is sent repeatedly (or the way of sending the message 3 ), resources are reasonably scheduled for the terminal device, so that resource utilization can be improved.
  • the terminal device determining the first random access preamble packet in at least two random access preamble packets includes: the terminal device receiving indication information from the network device ; The terminal device determines, according to the indication information, that the first random access preamble is associated with the sending mode in which the terminal device repeatedly sends the message 3; when the sending mode of the message 3 is that the terminal device repeatedly sends the message 3, the terminal The device determines the first random access preamble among at least two random access preambles.
  • the terminal device after the terminal device selects the synchronization signal block, according to the instruction of the network device, it determines that the first random access preamble is associated with the sending method of the terminal device repeatedly sending message 3, or in other words, the terminal device determines Instructions to determine that the first random access preamble is used to indicate repeated transmission of message 3, or in other words, the terminal device determines that the network device supports repeated transmission of message 3 through the first random access preamble according to the instruction of the network device . Further, when the terminal device wants to send the message 3 repeatedly, the terminal device selects the first random access preamble group.
  • the terminal device sends a random access preamble in the first random access preamble group to the network device, and the network device determines the sending method of the message 3 according to the random access preamble so that the terminal device repeatedly sends the message 3, so the message can be 3's transmission reasonably schedules resources.
  • the terminal device determines a first random access preamble packet in at least two random access preamble packets, including: the terminal device measures a Reference Signal Received Power RSRP; When the RSRP is less than the first threshold value, the terminal device determines the first random access preamble group in the at least two random access preamble groups, and the first random access preamble group and the terminal device repeatedly send the message 3
  • the transmission mode of the random access is associated, the first threshold is determined by the second threshold and the relative threshold, and the second threshold is used to determine the carrier type of the random access or the random access of the random access type or the sync signal block.
  • the relative threshold may be a threshold used to determine a carrier type of random access, a random access type of random access, or a synchronization signal block in an existing random access procedure. Therefore, in this scheme, only a relative threshold value needs to be configured for the terminal device, and the terminal device can determine the first threshold value according to the existing threshold value and the relative threshold value, instead of A separate threshold is configured for each situation, thereby saving signaling overhead.
  • the terminal device measures the RSRP after selecting the synchronization signal block, and when the RSRP meets the preset condition, selects the first random access preamble associated with the method of repeatedly sending the message 3 by the terminal device. Then the terminal device sends a random access preamble in the first random access preamble group to the network device, and the network device determines the sending method of the message 3 according to the random access preamble so that the terminal device repeatedly sends the message 3, so the message can be 3's transmission reasonably schedules resources.
  • the terminal device can determine the first threshold value according to the relative threshold value and the second threshold value, so for different carriers, different access types, and different synchronization signal blocks, the terminal device This manner can be used to determine the first threshold without configuring a separate threshold for each situation, thereby saving signaling overhead.
  • the terminal device determining the first random access preamble packet in at least two random access preamble packets includes: the terminal device receiving indication information from the network device ; The terminal device determines, according to the indication information, that the first random access preamble is associated with the transmission mode in which the terminal device repeatedly sends the message 3; the terminal device measures the reference signal received power RSRP; when the RSRP is less than the first threshold value , the terminal device selects the first random access preamble packet from the at least two random access preamble packets.
  • the random access preamble grouping in the above solution can also be replaced by random access opportunity grouping, that is, different random access preambles can be grouped according to random access opportunities, or different messages can be associated according to different random access opportunities3
  • the specific scheme is similar to the sending method and will not be repeated here.
  • the method further includes: the terminal device determines the relative threshold value according to the maximum number of repeated transmissions of the message 3, and the maximum number of repeated transmissions of the message 3 is related to the The relative threshold value is associated; or, the terminal device determines the relative threshold value according to the number of random access preambles in the first random access preamble group, and the random access preamble in the first random access preamble group The number is associated with the relative threshold value; or, the terminal device determines the relative threshold value according to the number of random access preambles in the first random access opportunity group, and the number of random access preambles in the first random access opportunity group The number of random access preambles is associated with the relative threshold; or, the terminal device determines the relative threshold according to the maximum transmit power capability or power type of the terminal device, and the maximum transmit power capability or power of the terminal device A type is associated with the relative threshold.
  • the terminal device can determine the relative threshold value according to the maximum number of repeated transmissions of message 3 or the number of random access preambles in the random access preamble group, or the number of random access preambles in the random access opportunity group, so There is no need for special signaling to configure the relative threshold, thereby saving signaling overhead.
  • a method for random access includes: after the terminal device selects a synchronization signal block for random access, determine the sending method of the random access message 3, the sending method of the message 3 includes : The terminal device repeatedly sends message 3, or the terminal device does not repeatedly send message 3; the terminal device determines the random access preamble in the first random access preamble group or the first random access opportunity group according to the sending method of the message 3 , the first random access preamble group or the first random access opportunity group is associated with the sending method of the message 3, and the synchronization signal block is related to the first random access preamble group or the first random access opportunity group connection; the terminal device sends the random access preamble to the network device.
  • the terminal device repeatedly sends the message 3, including one or more of the following situations: the terminal device wishes to repeatedly send the message 3, the terminal device has the ability to repeatedly send the message 3, and the terminal device needs to repeatedly send the message 3.
  • the terminal device wishes to be scheduled to send the message 3 repeatedly. The number of times the terminal device sends the message 3 is greater than 1 time.
  • the terminal device does not repeatedly send the message 3, including one or more of the following situations: the terminal device does not have the ability to repeatedly send the message 3, the terminal device does not need to repeatedly send the message 3, and the terminal device does not want to repeatedly send The message 3, the terminal device does not want to be scheduled to repeatedly send the message 3, and the number of times the terminal device sends the message 3 is less than or equal to 1 time.
  • the terminal device after the terminal device selects a random access synchronization signal block, it determines the sending method of the random access message 3, and the sending method of the message 3 is used to indicate Whether to send the message 3 repeatedly, the sending method of the message 3 is associated with at least one of the following situations: the terminal device repeatedly sends the message 3, the terminal device does not repeatedly send the message 3, the number of times the terminal device sends the message 3, and the terminal device has the ability to repeatedly send the message 3 Capability of message 3, the terminal device does not have the ability to repeatedly send message 3, the terminal device needs to send the message repeatedly 3, the terminal device does not need to send the message repeatedly 3, the terminal device wants to be scheduled to send the message repeatedly 3, the terminal device does not want The message 3 is scheduled to be sent repeatedly; the terminal device determines the random access preamble in the first random access preamble group or the first random access opportunity group according to the sending method of the message 3, and the first random access preamble group or The first random access opportunity group is associated with the sending manner of
  • the terminal device may first determine the sending method of message 3, and then select a random access preamble group or random access opportunity group according to the sending method of message 3, wherein the random access preamble group or the random access
  • the preamble opportunity group is associated with the sending mode of the message 3, that is, the terminal device selects the random access preamble group or the random access opportunity group associated with the sending mode of the message 3 according to the sending mode of the message 3.
  • the terminal device may determine the sending manner of the message 3 after selecting the synchronization signal block.
  • the network device can determine the sending method of message 3 according to the random access preamble group or random access opportunity group selected by the terminal device, so that resources can be more targetedly scheduled for the terminal device , which is conducive to the efficient use of resources.
  • determining the sending method of the random access message 3 includes: the terminal device measures the reference signal Received power RSRP; when the RSRP is less than a first threshold value, the terminal device determines to repeatedly send the message 3, the first threshold value is determined by a second threshold value and a relative threshold value, and the second threshold value is determined by For determining the carrier type of the random access or the random access type of the random access or the synchronization signal block.
  • the terminal device may determine the first threshold value according to the relative threshold value and the second threshold value, and then determine the sending method of message 3 according to the first threshold value.
  • the network device only needs to configure a relative threshold value for the terminal device, and the terminal device can determine the first threshold value based on the relative threshold value and other existing Different situations (different carrier types, different random access methods, different synchronization signal blocks, etc.) are assigned independent threshold values, so that signaling overhead can be saved.
  • the method further includes: the terminal device determines the relative threshold value according to the maximum number of repeated transmissions of the message 3, and the maximum number of repeated transmissions of the message 3 is related to the The relative threshold value is associated; or, the terminal device determines the relative threshold value according to the number of random access preambles in the first random access preamble group, and the random access preamble in the first random access preamble group The number is associated with the relative threshold value; or, the terminal device determines the relative threshold value according to the number of random access preambles in the first random access opportunity group, and the number of random access preambles in the first random access opportunity group The number of random access preambles is associated with the relative threshold; or, the terminal device determines the relative threshold according to the maximum transmit power capability or power type of the terminal device, and the maximum transmit power capability or power of the terminal device A type is associated with the relative threshold.
  • the terminal device can determine the relative threshold value according to the maximum number of repeated transmissions of message 3 or the number of random access preambles in the random access preamble group, or the number of random access preambles in the random access opportunity group, so There is no need for special signaling to configure the relative threshold, thereby saving signaling overhead.
  • determining the sending method of the random access message 3 includes: the terminal device receives the random access message 3 from the network Indication information of the device, the indication information is used to indicate whether the network device supports repeated transmission of the message 3; when the network device supports the repeated transmission of the message 3, and the terminal device needs and supports the repeated transmission of the message 3, the terminal device Make sure to send the message 3 repeatedly.
  • a method for random access includes: after selecting an access type of random access and/or before selecting a synchronization signal block of the random access, the terminal device determines the random access
  • the sending method of the message 3 includes: the terminal device repeatedly sends the message 3, or the terminal device does not repeatedly send the message 3; according to the sending method of the message 3, the terminal device
  • the group or the first random access opportunity group determines the random access preamble, the first random access preamble group or the first random access opportunity group is associated with the sending method of the message 3, and the synchronization signal block is associated with the first random access opportunity group
  • the access preamble group or the first random access opportunity group are associated; the terminal device sends the random access preamble to the network device.
  • the terminal device repeatedly sends the message 3, including one or more of the following situations: the terminal device wishes to repeatedly send the message 3, the terminal device has the ability to repeatedly send the message 3, and the terminal device needs to repeatedly send the message 3.
  • the terminal device wishes to be scheduled to send the message 3 repeatedly. The number of times the terminal device sends the message 3 is greater than 1 time.
  • the terminal device does not repeatedly send the message 3, including one or more of the following situations: the terminal device does not have the ability to repeatedly send the message 3, the terminal device does not need to repeatedly send the message 3, and the terminal device does not want to repeatedly send The message 3, the terminal device does not want to be scheduled to repeatedly send the message 3, and the number of times the terminal device sends the message 3 is less than or equal to 1 time.
  • the terminal device after the terminal device selects the access type of the random access, and/or before selecting the SSB of the random access, it determines the sending mode of the message 3,
  • the sending method of the message 3 is used to indicate whether to send the message 3 repeatedly, and the sending method of the message 3 is associated with at least one of the following situations: the terminal device repeatedly sends the message 3, the terminal device does not repeatedly send the message 3, and the terminal device sends the message 3 times, the terminal device has the ability to repeatedly send message 3, the terminal device does not have the ability to repeatedly send message 3, the terminal device needs to repeatedly send the message 3, the terminal device does not need to repeatedly send the message 3, the terminal device wants to be scheduled to repeat Sending the message 3, the terminal device does not want to be scheduled to send the message 3 repeatedly; the terminal device determines the random access preamble in the first random access preamble group or the first random access opportunity group according to the sending method of the message 3, The first random access preamble group or the first random access opportunity group is associated with the sending
  • the terminal device determines the sending method of the message 3, and then selects the random access method associated with the sending method of the message 3. In this way, in the subsequent random access process, the network device can determine the sending method of message 3 according to the random access preamble group or random access opportunity group selected by the terminal device, so that More targeted scheduling of resources for terminal equipment is conducive to the effective use of resources.
  • a method for random access includes: after selecting a carrier for random access and/or before selecting an access type for the random access, the terminal device determines the random access message 3, the sending method of the message 3 includes: the terminal device repeatedly sends the message 3, or the terminal device does not repeatedly send the message 3; the terminal device according to the sending method of the message 3, in the first random access preamble or The first random access opportunity group determines the random access preamble, the first random access preamble group or the first random access opportunity group is associated with the sending mode of the message 3, and the synchronization signal block is associated with the first random access opportunity group The preamble group or the first random access opportunity group are associated; the terminal device sends the random access preamble to the network device.
  • the terminal device repeatedly sends the message 3, including one or more of the following situations: the terminal device wishes to repeatedly send the message 3, the terminal device has the ability to repeatedly send the message 3, and the terminal device needs to repeatedly send the message 3.
  • the terminal device wishes to be scheduled to send the message 3 repeatedly. The number of times the terminal device sends the message 3 is greater than 1 time.
  • the terminal device does not repeatedly send the message 3, including one or more of the following situations: the terminal device does not have the ability to repeatedly send the message 3, the terminal device does not need to repeatedly send the message 3, and the terminal device does not want to repeatedly send The message 3, the terminal device does not want to be scheduled to repeatedly send the message 3, and the number of times the terminal device sends the message 3 is less than or equal to 1 time.
  • the terminal device determines the message 3 Sending method, the sending method of the message 3 is used to indicate whether to send the message 3 repeatedly; the sending method of the message 3 is associated with at least one of the following situations: the terminal device repeatedly sends the message 3, the terminal device does not repeatedly send the message 3, the terminal The number of times the device sends message 3, the terminal device has the ability to repeatedly send message 3, the terminal device does not have the ability to repeatedly send message 3, the terminal device needs to repeatedly send this message 3, the terminal device does not need to repeatedly send this message 3, the terminal device wants The message 3 is scheduled to be sent repeatedly, and the terminal device does not want to be scheduled to send the message 3 repeatedly; the terminal device determines the random access in the first random access preamble group or the first random access opportunity group according to the sending method of the message 3. The first random access preamble group or the first random access opportunity group is associated with the sending method of the
  • the terminal device after the terminal device selects the carrier for random access, and/or before the terminal device selects the access type of the random access, it determines the sending mode of the message 3, and then selects the method of sending the message 3.
  • a method for random access includes: before the terminal device selects a carrier for random access, determining the sending method of the random access message 3, the sending method of the message 3 includes: the The terminal device repeatedly sends message 3, or the terminal device does not repeatedly send message 3; the terminal device determines the random access preamble in the first random access preamble group or the first random access opportunity group according to the sending method of the message 3, the The first random access preamble group or the first random access opportunity group is associated with the sending mode of the message 3, and the synchronization signal block is associated with the first random access preamble group or the first random access opportunity group; The terminal device sends the random access preamble to the network device.
  • the terminal device repeatedly sends the message 3, including one or more of the following situations: the terminal device wishes to repeatedly send the message 3, the terminal device has the ability to repeatedly send the message 3, and the terminal device needs to repeatedly send the message 3.
  • the terminal device wishes to be scheduled to send the message 3 repeatedly. The number of times the terminal device sends the message 3 is greater than 1 time.
  • the terminal device does not repeatedly send the message 3, including one or more of the following situations: the terminal device does not have the ability to repeatedly send the message 3, the terminal device does not need to repeatedly send the message 3, and the terminal device does not want to repeatedly send The message 3, the terminal device does not want to be scheduled to repeatedly send the message 3, and the number of times the terminal device sends the message 3 is less than or equal to 1 time.
  • the sending method of the message 3 is used to indicate whether to repeatedly send the message 3
  • the sending method of the message 3 is associated with at least one of the following conditions: the terminal device repeatedly sends the message 3, the terminal device does not repeatedly send the message 3, the number of times the terminal device sends the message 3, the terminal device has the ability to repeatedly send the message 3, the terminal The device does not have the ability to repeatedly send the message 3, the terminal device needs to repeatedly send the message 3, the terminal device does not need to repeatedly send the message 3, the terminal device wants to be scheduled to send the message repeatedly 3, the terminal device does not want to be scheduled to send the message repeatedly 3.
  • the terminal device determines the random access preamble in the first random access preamble group or the first random access opportunity group, and the first random access preamble group or the first random access opportunity group
  • the grouping is associated with the sending mode of the message 3
  • the synchronization signal block is associated with the first random access preamble group or the first random access opportunity grouping.
  • the terminal device before selecting the carrier type for random access, determines the sending method of message 3, and then selects the random access preamble group or random access opportunity group associated with the sending method of message 3, so that , in the subsequent random access process, the network device can determine the sending mode of message 3 according to the random access preamble group or the random access opportunity group selected by the terminal device, so that resources can be more targetedly scheduled for the terminal device, Conducive to the efficient use of resources.
  • a device for random access which includes: a processing module configured to determine a first random access preamble group in at least two random access preamble groups, the at least two random access preamble groups The grouping is associated with the sending method of the message 3, and the message 3 is used for random access, and the sending method of the message 3 includes: the device repeatedly sends the message 3, or the device does not repeatedly send the message 3, and the at least two random At least one random access preamble in the access preamble is associated with the terminal device repeatedly sending the message 3; the processing module is also used to: determine the random access preamble in the first random access preamble; the transceiver module, It is used to send the random access preamble to the network device.
  • the apparatus includes: a processing module configured to determine a first random access preamble packet in at least two random access preamble packets, the at least two random access preamble packets
  • the incoming leading group is associated with the sending method of the message 3 of the random access procedure, and the sending method of the message 3 is used to indicate whether to repeatedly send the message 3, and the sending method of the message 3 is associated with at least one of the following situations: the device Repeatedly send the message 3, the device does not repeat the message 3, the number of times the device sends the message 3, the device has the ability to repeatedly send the message 3, the device does not have the ability to repeatedly send the message 3, the device needs The message 3 is sent repeatedly, the device does not need to send the message 3 repeatedly, the device wants to be scheduled to send the message 3 repeatedly, the device does not want to be scheduled to send the message 3 repeatedly, and at least There is a random access preamble group associated with the device repeatedly sending the message 3; the processing module is also used to determine the random access preamble group associated with the device repeatedly sending the message 3
  • the apparatus further includes a transceiver module, the transceiver module is specifically configured to: receive indication information from the network device; the processing module is specifically configured to: determine according to the indication information The first random access preamble group is associated with the sending method of the device repeatedly sending the message 3; when the sending method of the message 3 is that the device repeatedly sends the message 3, determine the method in at least two random access preamble groups The first random access preamble.
  • the transceiver module is specifically configured to: receive indication information from the network device; the processing module is specifically configured to: determine according to the indication information The first random access preamble group is associated with the sending method of the device repeatedly sending the message 3; when the sending method of the message 3 is that the device repeatedly sends the message 3, determine the method in at least two random access preamble groups The first random access preamble.
  • the processing module is specifically configured to: measure the reference signal received power RSRP; when the RSRP is smaller than the first threshold value, in the at least two random access preamble packets Determine the first random access preamble group, the first random access preamble group is associated with the device repeatedly sending the message 3, the first threshold value is determined by the second threshold value and the relative threshold value, the The second threshold is used to determine the carrier type of the random access or the random access type of the random access or the synchronization signal block.
  • the processing module is further configured to: determine the relative threshold value according to the maximum number of repeated transmissions of the message 3, and the maximum number of repeated transmissions of the message 3 is the same as the relative threshold. or, the relative threshold value is determined according to the number of random access preambles in the first random access preamble group, and the number of random access preambles in the first random access preamble group is related to the The relative threshold value is associated; or, the relative threshold value is determined according to the number of random access preambles in the first random access opportunity group, and the number of random access preambles in the first random access opportunity group is related to The relative threshold value is associated; or, the relative threshold value is determined according to the maximum transmission power capability or power type of the device, and the maximum transmission power capability or power type of the device is associated with the relative threshold value.
  • a device for random access includes: a processing module, configured to determine a sending method of the message 3 of the random access after selecting a synchronization signal block of the random access, and the message 3 of the message 3
  • the sending method includes: the device repeatedly sends the message 3, or the device does not repeatedly send the message 3; the processing module is also used for: according to the sending method of the message 3, in the first random access preamble group or the first random access opportunity
  • the group determines the random access preamble, the first random access preamble group or the first random access opportunity group is associated with the sending mode of the message 3, and the synchronization signal block is associated with the first random access preamble group or the first random access opportunity group
  • the random access opportunity group is associated; a transceiver module, the transceiver module is used to send the random access preamble to the network device.
  • the apparatus includes: a processing module configured to, after selecting a synchronization signal block for random access, determine a sending method of the random access message 3, the message The sending method of 3 is used to indicate whether to send the message 3 repeatedly, and the sending method of the message 3 is associated with at least one of the following situations: the device repeatedly sends the message 3, the device does not repeatedly send the message 3, and the device sends the message 3, the device has the ability to repeatedly send the message 3, the device does not have the ability to repeatedly send the message 3, the device needs to repeatedly send the message 3, the device does not need to repeat the message 3, and the device wants to be The message 3 is scheduled to be sent repeatedly, and the device does not want to be scheduled to send the message 3 repeatedly; the processing module is also configured to determine the first random access preamble group or the first random access opportunity group according to the sending method of the message 3 A random access preamble, the first random access preamble group or the first random access opportunity group is associated with the sending mode of the message 3, the
  • the processing module is specifically configured to: measure a reference signal received power RSRP; when the RSRP is smaller than a first threshold value, determine to repeatedly send the message 3, and the first The threshold value is determined by a second threshold value and a relative threshold value, and the second threshold value is used to determine the carrier type of the random access or the random access type of the random access or the synchronization signal block.
  • the processing module is further configured to: determine the relative threshold value according to the maximum number of repeated transmissions of the message 3, and the maximum number of repeated transmissions of the message 3 is the same as the relative threshold. or, the relative threshold value is determined according to the number of random access preambles in the first random access preamble group, and the number of random access preambles in the first random access preamble group is related to the The relative threshold value is associated; or, the relative threshold value is determined according to the number of random access preambles in the first random access opportunity group, and the number of random access preambles in the first random access opportunity group is related to The relative threshold value is associated; or, the relative threshold value is determined according to the maximum transmission power capability or power type of the device, and the maximum transmission power capability or power type of the device is associated with the relative threshold value.
  • the apparatus further includes a transceiver module, the transceiver module is specifically configured to receive indication information from a network device, where the indication information is used to indicate whether the network device supports repeated transmission The message 3; the processing module is specifically configured to: when the network device supports repeated transmission of the message 3, and the device needs and supports repeated transmission of the message 3, determine to repeatedly send the message 3.
  • the transceiver module is specifically configured to receive indication information from a network device, where the indication information is used to indicate whether the network device supports repeated transmission The message 3; the processing module is specifically configured to: when the network device supports repeated transmission of the message 3, and the device needs and supports repeated transmission of the message 3, determine to repeatedly send the message 3.
  • a device for random access which includes: a processing module configured to determine the The method of sending the message 3 of random access, the method of sending the message 3 includes: the device repeatedly sends the message 3, or the device does not repeatedly send the message 3;
  • the random access preamble group or the first random access opportunity group determines the random access preamble, the first random access preamble group or the first random access opportunity group is associated with the sending mode of the message 3, and the synchronization signal block and The first random access preamble group or the first random access opportunity group is associated;
  • a transceiver module configured to send the random access preamble to a network device.
  • a device for random access which includes: a processing module configured to determine the random access
  • the sending method of the incoming message 3, the sending method of the message 3 includes: the device repeatedly sends the message 3, or the device does not repeatedly send the message 3;
  • the random access preamble is determined by entering the preamble group or the first random access opportunity group, the first random access preamble group or the first random access opportunity group is associated with the sending mode of the message 3, and the synchronization signal block is associated with the second A random access preamble group or the first random access opportunity group is associated;
  • a transceiver module configured to send the random access preamble to a network device.
  • a device for random access includes: a processing module, configured to determine a sending method of the message 3 of the random access before selecting a carrier for random access, the sending method of the message 3 Including: the device repeatedly sends the message 3, or the device does not repeatedly send the message 3; the processing module is also used to determine the random access in the first random access preamble group or the first random access opportunity group according to the sending method of the message 3.
  • the first random access preamble group or the first random access opportunity group is associated with the sending method of the message 3, and the synchronization signal block is associated with the first random access preamble group or the first random access opportunity Group association; a transceiver module, configured to send the random access preamble to the network device.
  • a communication device in an eleventh aspect, includes: a processor configured to execute a computer program stored in a memory, so that the communication device executes any possible implementation of the first aspect or the fifth aspect Way.
  • a computer-readable storage medium is provided, and a computer program is stored on the computer-readable storage medium, and when the computer program is run on a computer, the computer is made to execute the first aspect to the fifth aspect. any possible implementation.
  • a computer program product includes computer program instructions, and when the computer program instructions run on a computer, the computer executes the method according to any one of the first aspect to the fifth aspect .
  • a chip system which includes: a processor, configured to call and run a computer program from a memory, so that a communication device installed with the chip system executes the first aspect to the fifth aspect any possible implementation.
  • FIG. 1 is a schematic diagram of a communication system applied in an embodiment of the present application.
  • FIG. 2 is another schematic diagram of a communication system applied in an embodiment of the present application.
  • Fig. 3 is a schematic flowchart of four-step random access.
  • Fig. 4 is a schematic diagram of an association relationship between SSB and random access preamble.
  • Fig. 5 is a schematic diagram of another association relationship between SSB and random access preamble.
  • Fig. 6 is a schematic flowchart of two-step random access.
  • Fig. 7 is a schematic flowchart of non-contention based random access.
  • Fig. 8 is an exemplary block diagram of a random access method provided by an embodiment of the present application.
  • Fig. 9 is an exemplary flow chart of a random access method provided by an embodiment of the present application.
  • FIG. 10 is an exemplary block diagram of another random access method provided by an embodiment of the present application.
  • Fig. 11 is an exemplary flow chart of another method for determining random access provided by the embodiment of the present application.
  • Fig. 12 is a schematic diagram of an association relationship between an SSB and a random access preamble provided by an embodiment of the present application.
  • Fig. 13 is a schematic diagram of another association relationship between the SSB and the random access preamble provided by the embodiment of the present application.
  • Fig. 14 is an exemplary block diagram of another random access method provided by an embodiment of the present application.
  • FIG. 15 is an exemplary flow chart of another random access method provided by an embodiment of the present application.
  • Fig. 16 is an exemplary block diagram of another random access method provided by an embodiment of the present application.
  • Fig. 17 is an exemplary flow chart of another random access method provided by an embodiment of the present application.
  • Fig. 18 is an exemplary block diagram of another random access method provided by an embodiment of the present application.
  • Fig. 19 is an exemplary flow chart of another random access method provided by an embodiment of the present application.
  • FIG. 20 is a schematic block diagram of an example of a device for random access of the present application.
  • Fig. 21 is a schematic block diagram of another example of the random access device of the present application.
  • FIG. 22 is a schematic structural diagram of an example of a terminal device of the present application.
  • the technical solutions of the embodiments of the present application can be applied to various communication systems, such as: 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, universal mobile telecommunication system (universal mobile telecommunication system, UMTS), global interconnection microwave access (worldwide interoperability for microwave access, WiMAX) communication system, 5G system or new radio (new radio, NR), the sixth generation (6th generation, 6G) system or future communication system, etc.
  • the 5G mobile communication system described in this application includes a non-standalone (NSA) 5G mobile communication system or a standalone (standalone, SA) 5G mobile communication system.
  • NSA non-standalone
  • SA standalone
  • the communication system may also be a public land mobile network (PLMN) network, a device-to-device (D2D) communication system, a machine-to-machine (M2M) communication system, an Internet of Things (Internet of Things, IoT) communication system or other communication systems.
  • PLMN public land mobile network
  • D2D device-to-device
  • M2M machine-to-machine
  • IoT Internet of Things
  • Fig. 1 shows a schematic diagram of a communication system applicable to the method of the embodiment of the present application.
  • the communication system may include at least one radio access network device, such as the radio access network device 110 shown in Figure 1; the communication system may also include at least one terminal device, such as the terminal device shown in Figure 1 120.
  • the radio access network device 110 and the terminal device 120 may communicate through a wireless link.
  • Each communication device such as the wireless access network device 110 or the terminal device 120 in FIG. 1 , may be configured with multiple antennas.
  • the plurality of antennas may include at least one transmit antenna for transmitting signals and at least one receive antenna for receiving signals.
  • each communication device additionally includes a transmitter chain and a receiver chain, and those of ordinary skill in the art can understand that they all include a plurality of components related to signal transmission and reception (such as processors, modulators, multiplexers, etc.) , demodulator, demultiplexer or antenna, etc.). Therefore, the radio access network device and the terminal device can communicate through the multi-antenna technology.
  • the wireless access network device in the wireless communication system may be any device with a wireless transceiver function.
  • the equipment includes but is not limited to: evolved Node B (evolved Node B, eNB), radio network controller (radio network controller, RNC), Node B (Node B, NB), base station controller (base station controller, BSC) , base transceiver station (Base Transceiver Station, BTS), home base station (for example, Home evolved NodeB, or Home Node B, HNB), baseband unit (baseband unit, BBU), wireless fidelity (wireless fidelity, WIFI) system in Access point (Access Point, AP), wireless relay node, wireless backhaul node, transmission point (transmission point, TP) or transmission and reception point (transmission and reception point, TRP), etc., can also be 5G, such as NR , a gNB in the system, or, a transmission point (TRP or TP), one or a group (including multiple antenna panels) antenna panels of a
  • a gNB may include a centralized unit (CU) and a DU.
  • the gNB may also include a radio unit (radio unit, RU).
  • CU implements some functions of gNB
  • DU implements some functions of gNB, for example, CU implements radio resource control (radio resource control, RRC), packet data convergence layer protocol (packet data convergence protocol, PDCP) layer functions
  • DU implements wireless link
  • the radio access network device may be a CU node, or a DU node, or a device including a CU node and a DU node.
  • the CU can be divided into radio access network equipment in the access network (radio access network, RAN), and the CU can also be divided into radio access network equipment in the core network (core network, CN). No limit.
  • terminal equipment in the wireless communication system may also be referred to as user equipment (user equipment, UE), access terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile equipment, User terminal, terminal, wireless communication device, user agent or user device.
  • user equipment user equipment
  • access terminal subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile equipment, User terminal, terminal, wireless communication device, user agent or user device.
  • the terminal device in the embodiment of the present application may be a mobile phone (mobile phone), a tablet computer (pad), a computer with a wireless transceiver function, a virtual reality (virtual reality, VR) terminal device, an augmented reality (augmented reality, AR) terminal Equipment, wireless terminals in industrial control, wireless terminals in self driving, wireless terminals in remote medical, wireless terminals in smart grid, transportation safety ( Wireless terminals in transportation safety, wireless terminals in smart city, wireless terminals in smart home, etc.
  • the embodiments of the present application do not limit the application scenarios.
  • various aspects or features of the present application may be implemented as a method, apparatus, or article of manufacture using standard programming and/or engineering techniques.
  • article of manufacture covers a computer program accessible from any computer readable device, carrier or media.
  • computer-readable media may include, but are not limited to: magnetic storage devices (e.g., hard disks, floppy disks, or tapes, etc.), optical disks (e.g., compact discs (compact discs, CDs), digital versatile discs (digital versatile discs, DVDs), etc.), smart cards and flash memory devices (for example, erasable programmable read-only memory (EPROM), card, stick or key drive, etc.).
  • magnetic storage devices e.g., hard disks, floppy disks, or tapes, etc.
  • optical disks e.g., compact discs (compact discs, CDs), digital versatile discs (digital versatile discs, DVDs), etc.
  • smart cards and flash memory devices for example, erasable programmable read-only
  • various storage media described herein can represent one or more devices and/or other machine-readable media for storing information.
  • the term "machine-readable medium” may include, but is not limited to, wireless channels and various other media capable of storing, containing and/or carrying instructions and/or data.
  • the communication between the radio access network device 110 and the terminal device 120 in the communication system shown in FIG. 1 can also be expressed in another form.
  • the transceiver 123 includes a transmitter 1231 , a receiver 1232 and an antenna 1233 .
  • the radio access network device 110 includes a processor 111 , a memory 112 and a transceiver 113 , and the transceiver 113 includes a transmitter 1131 , a receiver 1132 and an antenna 1133 .
  • the receiver 1132 may be configured to receive transmission control information through the antenna 1133
  • the transmitter 1131 may be configured to send transmission feedback information to the wireless access network device 110 through the antenna 1133 .
  • the transmitter 1131 may be configured to send transmission control information to the terminal device 120 through the antenna 1133
  • the receiver 1132 may be configured to receive the transmission feedback information sent by the terminal device 120 through the antenna 1133 .
  • embodiments of the present application may be applied to a communication system including one or more network devices, and may also be applied to a communication system including one or more terminals, which is not limited in this application.
  • a network device can send data or control signaling to one or more terminals. Multiple network devices can also send data or control signaling to one or more terminals at the same time.
  • an information exchange mechanism for devices not connected to the network to establish a connection with the network. Since the random access process is carried by a random access channel (RACH), RA and RACH are often used together in protocols and spoken language. It is divided into contention-based random access and non-contention-based random access.
  • the contention-based random access is generally divided into four steps, and each step corresponds to a message: including message 1, message 2, message 3, and message 4, which carry different signaling or information respectively. Random access based on non-contention only has the first two steps.
  • 2-step random access it consists of message A and message B, where message A includes the preamble and the first data information (for example, similar to message 1 and message 3 in 4-step random access), and message B Including contention resolution and uplink scheduling (such as message 2 and message 4 in 4-step random access).
  • Random access opportunity also known as random access resource (RACH resource), random access opportunity (RACH occasion/RACH transmission occasion/RACH opportunity/RACH chance, RO), refers to the information used to carry one or more random access preambles time and frequency resources.
  • RACH resource random access resource
  • RACH occasion/RACH transmission occasion/RACH opportunity/RACH chance, RO refers to the information used to carry one or more random access preambles time and frequency resources.
  • PRACH physical random access channel
  • PRACH resource physical random access resource
  • Reference signal reference signal
  • demodulation reference signal demodulation reference signal
  • DMRS demodulation reference signal
  • channel state information reference signal channel state information reference signal
  • CSI-RS channel state information reference signal
  • phase tracking reference signal phase tracking reference signal
  • PTRS phase tracking reference signal
  • channel sounding Reference signal sounding reference signal, SRS
  • Reference signals are used to obtain known signals that are affected by the outside world (for example, spatial channels, non-idealities of transmitting or receiving devices) during transmission, and are generally used for channel estimation, auxiliary signal demodulation, and detection.
  • DMRS and CSI-RS are used to obtain channel information
  • PTRS is used to obtain phase change information.
  • reference signal receiving power reference signal receiving power
  • RSSI received signal strength indicator
  • RSRQ reference signal reception quality
  • Resource block (resource block, RB):
  • a resource block is the basic unit of frequency resources in an OFDM-based communication system.
  • a resource block generally consists of N resource elements (resource elements, REs), and a resource element is also called a subcarrier. Wherein N is generally 12.
  • resource blocks form a resource block group (resource block group, RBG), or also called a physical resource block group.
  • RBG resource block group
  • precoding is performed in units of resource blocks or resource block groups, and the basic unit for precoding transmission is also called a precoding resource block group (PRG).
  • PRG precoding resource block group
  • One precoding resource group may not be smaller than one resource block group.
  • DCI Downlink control information
  • DCI Downlink control information
  • DCI can be used to send downlink or uplink scheduling, resource allocation, power control, retransmission indication and other information.
  • the DCI may indicate information at the terminal equipment level, and may be scrambled using a cell radio network temporary identifier (C-RNTI).
  • C-RNTI cell radio network temporary identifier
  • DCI may also indicate cell-level information, and system information radio network temporary identifier (SI-RNTI), paging radio network temporary identifier (P-RNTI) may be used. ), random access radio network temporary identifier (RA-RNTI) and other scrambling.
  • SI-RNTI system information radio network temporary identifier
  • P-RNTI paging radio network temporary identifier
  • RA-RNTI random access radio network temporary identifier
  • time-frequency resources may include resources in the time domain and resources in the frequency domain.
  • the time-frequency resource may include one or more time-domain units (or may also be referred to as a time unit), and in the frequency domain, the time-frequency resource may include a frequency-domain unit.
  • a time-domain unit (also referred to as a time unit) may be a symbol, or a mini-slot (Mini-slot), or a slot (slot), or a sub-frame (subframe), wherein, a sub- The duration of a frame in the time domain can be 1 millisecond (ms), a slot consists of 7 or 14 symbols, and a mini-slot can include at least one symbol (e.g., 2 symbols or 7 symbols or 14 symbols, or any number of symbols less than or equal to 14 symbols).
  • the size of the above-mentioned time-domain unit is only for the convenience of understanding the solution of this application, and should not be understood as a limitation of this application. It can be understood that the above-mentioned time-domain unit size can be other values, which is not limited in this application.
  • a frequency domain unit may be a resource block, or a resource block group, or a predefined subband (subband).
  • One random access method is four-step random access.
  • the four-step random access is only used to represent a name of a random access manner, and its specific name does not limit the scope of this embodiment of the application.
  • Four steps of information interaction (Msg1, Msg2, Msg3, Msg4) are required between the terminal device and the network device.
  • the basic flow 100 of the four-step random access procedure is shown in FIG. 3 .
  • the network device sends a synchronization signal, system information and/or random access configuration information to the terminal device.
  • the network device broadcasts synchronization signals and system information at a specific location.
  • the synchronization signal sent by the base station is called a synchronization signal/physical broadcast channel block (SSB) (or SS/PBCH block), and the SSB and system information are periodically sent by the network device according to the configuration.
  • SSB synchronization signal/physical broadcast channel block
  • the network device may also send random access configuration information to the terminal device, so as to facilitate the terminal device to determine random access preamble (random access preamble) index, time-frequency resource, power configuration and other information.
  • random access preamble random access preamble index
  • time-frequency resource time-frequency resource
  • power configuration power configuration and other information.
  • the terminal device sends a Msg1 to the network device.
  • the terminal device After the terminal device is turned on or needs to re-connect to the network, it scans the synchronization signal of the network device to perform downlink time and frequency synchronization, and at the same time receives configuration information about random access resources (random access configuration information) in the system information.
  • random access configuration information random access configuration information
  • the terminal device selects the random access resource associated with the SSB, which includes time, frequency resources, and code domain resources (random access preamble), and uses the random access resource
  • the random access signal is sent using the incoming resources, which is also called message 1 (Msg1).
  • Msg1 that is, the random access preamble (preamble or sequence)
  • the PRACH It is usually used to initiate connection requests, handover requests, synchronization requests, and scheduling requests between devices and networks.
  • FIG. 4 and FIG. 5 are schematic diagrams of the association relationship between the two SSBs and the random access preamble. Wherein, in the association relationship shown in FIG. 4 , multiple SSBs are associated with different random access preambles in the same random access opportunity, and different SSBs can be distinguished through the preamble sequence index. In the association relationship shown in FIG. 5 , one SSB is associated with multiple random access opportunities.
  • the preambles in the random access opportunities associated with K (K ⁇ 1) SSBs are only used for 4-step RA.
  • a ⁇ K random access preambles are used for not repeatedly sending message 3
  • B ⁇ K random access preambles are used for repeatedly sending message 3
  • a and B are integers.
  • the preamble index is 0 ⁇ (A+B) ⁇ K-1 for being associated with K SSBs, and each SSB is associated with (A+B) random access preambles, wherein A random access preambles For not repeatedly sending message 3, the B random access preambles do not repeatedly send message 3.
  • the preambles in the random access opportunities associated with K (K ⁇ 1) SSBs are only used for 2-step RA.
  • a ⁇ K random access preambles are used for not repeatedly sending message A
  • B ⁇ K random access preambles are used for repeatedly sending message A
  • a and B are integers.
  • leading index is 0 ⁇ A ⁇ K-1 for not repeatedly sending message A
  • leading index A ⁇ K ⁇ A ⁇ K+B ⁇ K-1 is used for repeatedly sending message A
  • leading index A ⁇ k ⁇ A ⁇ (k+1)-1 and A ⁇ K+B ⁇ k ⁇ A ⁇ K+B ⁇ (k+1)-1 are associated to the kth SSB
  • the preamble index is 0 ⁇ (A+B) ⁇ K-1 for being associated with K SSBs, and each SSB is associated with (A+B) random access preambles, wherein A random access preambles For not repeatedly sending message A, the B random access preambles do not repeatedly send message A.
  • preambles in random access opportunities associated with K (K ⁇ 1) SSBs where MK random access preambles are used for 4-step RA, and NK random access preambles are used for 2-step RA step RA. All random access preambles are used for non-repeated transmission of message 3 or message A.
  • preambles in random access opportunities associated with K (K ⁇ 1) SSBs where MK random access preambles are used for 4-step RA, and NK random access preambles are used for 2-step RA step RA.
  • MK random access preambles are used for 4-step RA
  • AK random access preambles are used for non-repeated transmission of message 3
  • BK random access preambles are used for repeated transmission of message 3, A+B ⁇ M (the details are the same as in the previous embodiment).
  • all NK leading corresponding messages A for 2-step RA are not sent repeatedly.
  • preambles in random access opportunities associated with K (K ⁇ 1) SSBs where MK random access preambles are used for 4-step RA, and NK random access preambles are used for 2-step RA step RA.
  • NK random access preambles used for 2-step RA AK random access preambles are used for non-repeated transmission of message A
  • BK random access preambles are used for repeated transmission of message A, A+B ⁇ N (the details are the same as in the previous embodiment).
  • all MK leading corresponding messages 3 for 4-step RA are not sent repeatedly.
  • the network device In NR, through the association between the SSB and the random access resource, after the network device detects the random access preamble, it can obtain the sending message 2 (Msg2) and/or the downlink beam.
  • Msg2 sending message 2
  • the network device sends Msg2 to the terminal device.
  • the network device After receiving the Msg1 sent by the terminal device, the network device estimates the timing advance of the terminal device according to the preamble sent by the terminal device, and replies to the terminal device with message 2 (Msg2).
  • Msg2 includes the message 3 (Msg3) used by the terminal device to send ) configuration information such as time-frequency resource position for conflict resolution, modulation and coding mode, etc.
  • Msg2 is also called a random access response (random access response, RAR) message, which is the response of the network device to the received Msg1, and one Msg2 can respond to multiple Msg1s.
  • RAR random access response
  • Msg2 is also called a random access response (random access response, RAR) message, which is the response of the network device to the received Msg1, and one Msg2 can respond to multiple Msg1s.
  • RAR random access response
  • Msg2 is also called a random access response (random access response, RAR) message, which is the response of the network device to the received Msg1, and one Msg2 can respond to multiple Msg1s.
  • RAR random access response
  • RAR can be referred to as message 2 at both the physical layer and the MAC layer, but it is also generally referred to as a response message corresponding to a specific (for example, sent by the terminal) random access preamble at the physical layer;
  • the MAC layer is for a random access opportunity or a combination of all random access preamble response messages detected by the base station in a random access opportunity or multiple random access opportunities, and group them in the form of MAC data units.
  • RAR includes at least one of the following information: Msg1 index (random access preamble identity, RAPID), uplink scheduling grant (uplink grant), time advance (timing advance), temporary cell-wireless network temporary identity (temporary cell radio network temporary identity, TC-RNTI), etc.
  • Msg1 index random access preamble identity, RAPID
  • uplink scheduling grant uplink grant
  • time advance timing advance
  • temporary cell-wireless network temporary identity temporary cell radio network temporary identity, TC-RNTI
  • the terminal device After sending the random access preamble, the terminal device searches the corresponding Msg2 for the random access response message corresponding to the random access preamble sent by itself, and ignores the response messages for other random access preambles.
  • the terminal device sends Msg3 to the network device.
  • the terminal device After receiving Msg2, the terminal device sends message 3 in the corresponding time-frequency resource according to the configuration in Msg2; the transmission of Msg3 is also called the first uplink scheduling transmission, which is scheduled by the UL grant in message 2, or TC-RNTI
  • the transmission content of Msg3 is a high-level message, such as a connection establishment request message (specifically, it may be the identification information of the user who initiates the connection request). The purpose of this message is to resolve contention. If multiple different devices use the same Msg1 for random access, Msg3 and Msg4 can jointly determine whether there is a conflict.
  • the transmission of message 3 includes retransmission and power control (that is, there is power control information in the UL grant that schedules initial transmission or retransmission).
  • the network device sends Msg4 to the terminal device.
  • the base station After receiving the message 3, the base station replies with a message 4 (Msg4) to the user, indicating that the terminal user has successfully accessed.
  • Msg4 message 4
  • Msg4 is used for contention resolution. Usually includes the CCCH SDU carried in message 3. If the terminal device detects the CCCH SDU sent by itself in message 4, it considers that the contention random access is successful, and continues the next communication process. Message 4 has retransmission, that is, there is corresponding physical uplink control channel (physical uplink control channel, PUCCH) transmission feedback information (whether message 4 is successfully detected), and the terminal device has power control for sending feedback information on PUCCH.
  • PUCCH physical uplink control channel
  • Msg1, Msg3, and Msg4 may have retransmission (for example, retransmission after transmission failure).
  • One random access method is two-step random access.
  • Two-step information interaction (MsgA, Msg B) is required between the terminal device and the network device.
  • the basic flow 200 of the two-step random access procedure is shown in FIG. 6 .
  • the terminal device sends a message A (Msg A) to the network device.
  • the Msg A includes the random access preamble and the first data information.
  • the network device sends Msg B to the terminal device.
  • the network device sends a random access response Msg B to the terminal device, and the Msg B includes contention resolution and uplink scheduling.
  • the random access process based on non-contention mainly includes two steps.
  • a non-contention based random access procedure 300 is shown in FIG. 7 . The following is an exemplary description of the process 300:
  • the network device sends a synchronization signal, system information and/or random access configuration information to the terminal device.
  • S301 is similar to S101 in the process 100 and will not be described again.
  • the terminal device sends Msg1 to the network device.
  • the terminal device sends a random access preamble, also called Msg1, to the network device.
  • a random access preamble also called Msg1
  • the random access preamble is dedicated to the terminal device, so there is no collision.
  • the network device sends Msg2 to the terminal device.
  • the network device sends a random access response, also called Msg2, to the terminal device.
  • the terminal device determines a first random access preamble packet in at least another random access preamble packet, and the at least two random access preamble packets are associated with a sending manner of message 3 of the random access procedure
  • the method of sending the message 3 includes: the terminal device repeatedly sends the message 3, or the terminal device does not repeatedly send the message 3, and at least one random access preamble packet in the at least two random access preamble packets is related to the terminal device
  • the sending manner of repeatedly sending the message 3 is related; the terminal device determines the random access preamble in the first random access preamble group; the terminal device sends the random access preamble to the network device.
  • the terminal device repeatedly sends the message 3, including one or more of the following situations: the terminal device has the ability to repeatedly send the message 3, the terminal device needs to repeatedly send the message 3, and the terminal device wishes to repeatedly send the message 3. The terminal device wishes to be scheduled to repeatedly send the message 3. The number of times the terminal device sends the message 3 is greater than 1 time;
  • the terminal device does not repeatedly send the message 3, including one or more of the following situations: the terminal device does not have the ability to repeatedly send the message 3, the terminal device does not need to repeatedly send the message 3, and the terminal device does not want to repeatedly send The message 3, the terminal device does not want to be scheduled to repeatedly send the message 3, and the number of times the terminal device sends the message 3 is less than or equal to 1 time.
  • the terminal device determines the first random access preamble group in at least two random access preamble groups, and the at least two random access preamble groups are related to the message 3 (Msg3) of the random access process
  • Msg3 message 3
  • the sending method of the Msg3 is used to indicate whether to send the Msg3 repeatedly.
  • the sending method of the Msg3 is associated with at least one of the following situations: the terminal device repeatedly sends Msg3, the terminal device does not repeatedly send Msg3, and the terminal device sends The number of Msg3 times, the terminal device has the ability to repeatedly send Msg3, the terminal device does not have the ability to repeatedly send Msg3, the terminal device needs to repeatedly send Msg3, the terminal device does not need to repeatedly send Msg3, the terminal device wants to be scheduled to Hope to be scheduled to send Msg3 repeatedly (If there is no special description, in this application, the terminal device in the Msg3 sending method repeatedly sends Msg3, the terminal device has the ability to repeatedly send Msg3, the terminal device needs to repeatedly send Msg3, and the terminal device wants to be scheduled to repeat Send Msg3, the number of times the terminal device sends Msg3 is greater than 1, use "repeatedly send Msg3" as an example to describe; in this application, the terminal device in the Msg3 sending method does not repeatedly send Msg3,
  • the terminal device may select a random access preamble group after selecting a random access synchronization signal block, wherein the terminal device determines the first random access preamble group in at least two random access preamble groups
  • the specific method may include: an example, the terminal device receives indication information from the network device; the terminal device determines according to the indication information that the first random access preamble packet is associated with the sending method of repeatedly sending Msg3 by the terminal device; when the Msg3 The sending method is that the terminal device repeatedly sends the MSg3, and the terminal device determines the first random access preamble group in at least two random access preamble groups, or in other words, the terminal device selects the first random access preamble group.
  • the terminal device measures the reference signal received power RSRP (for example, the RSRP of the synchronization signal block), and when the RSRP is smaller than the first threshold value, the terminal device determines the first random access preamble packet in the at least two random access preamble packets.
  • RSRP reference signal received power
  • the first threshold value is determined by a second threshold value and a relative threshold value, and the second threshold value is used to determine the carrier type of random access or the random access input type or random access sync signal block.
  • the terminal device receives indication information from the network device; the terminal device determines, according to the indication information, that the first random access preamble packet is associated with the transmission mode in which the terminal device repeatedly sends Msg3; the terminal device measures the reference signal received power RSRP, when the RSRP is smaller than the first threshold, the terminal device determines (or selects) the first random access preamble in the at least two random access preamble groups.
  • the terminal device determines the first random access opportunity group in at least two random access opportunity groups, the at least two random access opportunity groups are associated with the sending mode of Msg3 in the random access process, and the sending mode of Msg3 is set by
  • the sending method of the Msg3 includes being associated with at least one of the following situations: the terminal device repeatedly sends the Msg3, or the terminal device does not repeatedly send the Msg3, and at least one of the at least two random access opportunity groups
  • the random access opportunity group is associated with the sending method of the terminal device repeatedly sending Msg3, or in other words, at least one random access opportunity group in the at least two random access opportunity groups is used to indicate (or correspond to) repeatedly sending Msg3; the The terminal device determines a random access preamble in the first random access preamble group.
  • the group of random access opportunities here may include multiple random access opportunities, or only one random access opportunity, that is, one random access opportunity may form a single group.
  • Method 400 includes:
  • the terminal device selects a carrier type.
  • the terminal device when a terminal device needs to establish a connection with a network device (such as a base station), the terminal device measures the received power RSRP of the downlink reference signal, where the downlink reference signal here may be the SSB or channel state information A reference signal (channel state information reference signal, CSI-RS), the reference signal may also be called a downlink pathloss reference (downlink pathloss reference) signal.
  • the downlink reference signal here may be the SSB or channel state information
  • a reference signal channel state information reference signal, CSI-RS
  • the reference signal may also be called a downlink pathloss reference (downlink pathloss reference) signal.
  • the terminal device when the terminal device is configured with SUL resources and RSRP ⁇ SUL threshold value, the terminal device selects SUL as the carrier used for this random access. Otherwise, the terminal device selects NUL as the carrier used for this random access.
  • the SUL threshold may be configured in advance by the network device for the terminal device, and the SUL threshold may be recorded as rsrp-ThresholdSSB-SUL.
  • the terminal device may also determine the type of the carrier used for this random access according to the instruction of the network device, or the terminal device may determine the carrier type used for this random access by itself.
  • the carrier type is not limited in this application.
  • the terminal device selects a random access type.
  • the terminal device after selecting a carrier, the terminal device further selects a random access type of this random access.
  • the terminal device when the terminal device is configured with 2-step resources (resources for 2-step random access), and RSRP>Msg A threshold value, the terminal device selects to perform 2-step random access, Otherwise, the terminal device chooses to perform 4-step random access.
  • the Msg A threshold value may be configured by the network device in advance for the terminal device, and the Msg A threshold value may be recorded as msgA-RSRP-Threshold.
  • the terminal device selects the SSB.
  • the terminal device chooses to perform 2-step random access, if RSRP>SSB threshold value at this time, the terminal device selects one of the SSB candidates, otherwise The terminal device selects any SSB; if in S402, the terminal device chooses to perform 4-step random access, and the RSRP measured by the terminal device corresponds to the SSB (that is, the RSRP is obtained by measuring the SSB), then if RSRP>SSB threshold value, the terminal device selects an SSB among candidate SSBs, otherwise the terminal device selects any SSB; if at S402, the terminal device selects to perform 4-step random access, and the RSRP measured by the terminal device corresponds to the CSI-RS (that is, RSRP is obtained by measuring CSI-RS), at this time, if RSRP>CSI-RS threshold value, the terminal device selects one SSB among the candidate SSBs, otherwise the terminal device selects any SSB
  • the SSB threshold and the CSI-RS threshold may be configured by the network device to the terminal device in advance, the SSB threshold may be recorded as rsrp-ThresholdSSB, and the CSI-RS threshold may be recorded as rsrp-ThresholdSSB. ThresholdCSI-RS.
  • threshold values may be configured by the network device through high-level signaling, that is, these threshold values may be carried in high-level signaling and sent to the terminal device.
  • the high-level signaling here may be, for example, a physical broadcast channel (physical broadcast channel) , PBCH), remaining minimum system information (remaining minimum system information, RMSI), system information block (system information block, SIB) 1, SIB2, SIB3, media access control-control element (media access control-control element, MAC- CE), downlink control information DCI, radio resource control RRC, system information, etc.
  • the terminal device selects a random access preamble group/random access opportunity group.
  • the terminal device selects the first random access preamble packet from at least two random access preamble packets, and at least one random access preamble packet among the at least two random access preamble packets repeatedly sends Msg3 to the terminal device In other words, at least one random access preamble among the at least two random access preambles is used to indicate to send Msg3 repeatedly.
  • the method for sending the Msg3 includes: the terminal device repeatedly sends the Msg3, or the terminal device does not repeatedly send the Msg3.
  • the sending method of Msg3 here means that when the initial transmission of Msg3 is scheduled or retransmission is scheduled, Msg3 is repeatedly sent or Msg3 is not repeatedly sent (that is, in this scheduling, Msg3 is sent only once, or Msg3 is sent multiple times). In another implementation manner, Msg3 may not be repeatedly sent when it is initially transmitted, but may be repeatedly sent when it is scheduled for retransmission.
  • repeatedly sending Msg3 means that the content of the same Msg3 (also referred to as payload) is mapped to multiple different times (for example, distributed on one or more time slots) after physical layer processing such as encoding and modulation. OFDM symbols, or one or more transmission opportunities) and/or frequency domain resource regions for transmission.
  • different (encoded) redundancy versions of the same Msg3 can be sent, or the same redundancy version, or part of the repeated transmission adopts the same redundancy version, and part of the repeated transmission adopts different redundancy versions.
  • the resource for sending message 3 is scheduled by the network device in the Msg2 random access response, or indicated by the downlink control information DCI.
  • This resource can be a single resource, which is used for repeated or non-repeated sending of Msg3. There may also be multiple shares of the resource, and the terminal device may select one or more shares, each of which is used for repeated or non-repeated transmission of Msg3.
  • Msg3 is not repeatedly sent, which means that the content of Msg3 (also called payload) is mapped to a single time (which can refer to a time slot, or multiple OFDM symbols, or Multiple OFDM symbols on multiple timeslots) and/or frequency domain resource regions for transmission. During this process, only a single (encoded) redundant version of the same Msg3 is sent.
  • the terminal device may determine the sending mode of Msg3 before determining the random access preamble (or determining the random access preamble group in which the random access preamble is located, or determining the random access opportunity group in which the random access preamble is located). For example, the terminal device may determine the sending manner of Msg3 in the random access procedure before or after selecting the synchronization signal block SSB for random access.
  • the terminal device determines that the network device supports repeated sending of Msg3 in the second random access preamble packet/second random access opportunity packet according to the instruction from the network device, and the sending method of the Msg3 is When the terminal device repeatedly sends the Msg3, the terminal device selects the random access preamble in the second random access preamble group/second random access opportunity group, and repeatedly sends the Msg3; when the terminal device determines the network device according to the instruction information from the network device It does not support repeated sending of Msg2 in the third random access preamble/third random access opportunity, or when the sending method of the Msg3 is that the terminal device does not repeatedly send the Msg3, the terminal device does not repeatedly send the Msg3, wherein the first The second random access preamble packet/the second random access opportunity packet is associated with the sending manner in which the terminal device repeatedly sends Msg3.
  • the terminal device repeatedly sends Msg3, which means any of the following: the terminal device needs to repeatedly send Msg3; the terminal device has the ability to repeatedly send Msg3; the terminal device has the ability to repeatedly send Msg3, and wants/needs to repeatedly send Msg3; the terminal Have the ability to repeatedly send Msg3, and want/need network equipment to schedule Msg3 to repeatedly send (resources); the terminal has the ability to repeatedly send Msg3, and does not want to be scheduled by Msg2 to repeatedly send Msg3, but can repeatedly send Msg3 when Msg3 is retransmitted ;
  • the load of Msg3 satisfies certain constraints, and the base station is expected/needed to schedule Msg3 to be repeatedly transmitted (resources); the downlink signal selected by the terminal device satisfies certain constraints, and the base station is expected/needed to schedule Msg3 to be repeatedly transmitted (resources).
  • the terminal device does not repeatedly send Msg3, which means any of the following: the terminal device does not need to repeatedly send Msg3; the terminal device does not have the ability to repeatedly send Msg3; the terminal device has the ability to repeatedly send Msg3, but does not want to be scheduled by Msg2 Msg3 is sent repeatedly; the terminal device has the ability to send Msg3 repeatedly, but does not want/need to send Msg3 repeatedly.
  • Group A Group A
  • Group B Group B
  • network devices can pass Group B (or Group A) configures a reserved value to indicate that the network device supports repeated transmission of Msg3 in Group B.
  • Group A and Group B are different groups used to distinguish the size of the Msg3 load. For example:
  • random access preamble group B For 4-step random access: if random access preamble group B is configured, and the potential Msg3 size is larger than ra-Msg3SizeGroupA, and the path loss value is smaller than PCMAX–preambleReceivedTargetPower–msg3-DeltaPreamble–messagePowerOffsetGroupB, then select random access preamble group B, Among them, PCMAX represents the maximum allowable output power, preambleReceivedTargetPower represents the preamble target received power, msg3-DeltaPreamble corresponds to message 3 and preamble power offset value, messagePowerOffsetGroupB corresponds to group B message power offset value; or, if random access preamble group B is configured , and the random access process is initiated by the CCCH logical channel, and the size of the common control channel (common control channel, CCCH) service data unit (service data unit, SDU) plus the MAC subheader is greater than r
  • Random Access Preambles group B if Random Access Preambles group B is configured:
  • ra-Msg3SizeGroupA can be configured as follows:
  • b in the above example indicates bits, and the following numbers indicate the number of bits. That is, b56 represents 56 bits.
  • the path loss value is smaller than PCMAX–msgA-PreambleReceivedTargetPower–msgA-DeltaPreamble–messagePowerOffsetGroupB , then select the random access preamble group B; or, if the random access preamble group B is configured, and the random access process is initiated by the CCCH logical channel, the size of the CCCH SDU plus the MAC subheader is greater than ra-MsgA-SizeGroupA, then Random access leading packet B is selected. Otherwise, random access leading group A is selected.
  • Random Access Preambles group B for 2-step RA type is configured:
  • the potential MSGA payload size(UL data available for transmission plus MAC subheader and,where required,MAC CEs) is greater than the ra-MsgA-SizeGroupA and the pathloss is less than PCMAX(of the Serving Cell performing the Random Access)Proc –msgA-PreambleReceivedTargetPower –msgA-DeltaPreamble –messagePowerOffsetGroupB; or
  • ra-MsgA-SizeGroupA can be configured as follows:
  • the network device can indicate that the network device supports repeated transmission of Msg3 in Group B by configuring a reserved value for Group B, where the reserved value can be value-a, value-b, value-c, value One or more of -d.
  • the reserved value can be value-a, value-b, value-c, value One or more of -d.
  • Group B When the configuration value of Group B is any one of b56, b144, b208, b256, b282, b480, b640, b800, b1000, b72, it means that Group B (leader) corresponds to the size and/or path loss of Msg3, In other words, Group B is a random access preamble associated with the size and/or path loss of Msg3. At this time, Msg3 is not repeatedly sent, or the terminal device determines not to repeatedly send Msg3 according to the configuration value of Group B.
  • the configuration value here can be ra-Msg3SizeGroupA in the above example;
  • the configuration value of Group B is one or more of value-a, value-b, value-c, and value-d
  • the (preamble) of Group B can be used to instruct Msg3 to send repeatedly
  • Group B (The preamble of) may be used to indicate that the network device supports repeated transmission of Msg3, or Group B is a random access preamble associated with the transmission mode of repeated transmission of Msg3.
  • the network device configures ra-Msg3SizeGroupA as one of value-a, value-b, value-c, and value-d
  • the terminal device supports and wants Msg3 to be sent repeatedly (also supports other preset conditions )
  • the terminal device can select a random access preamble from the packet.
  • the values of value-a, value-b, value-c, and value-d may be any integer.
  • Group B when the configuration value of Group B is one or more of value-a, value-b, value-c, value-d, it means that Group B (leader) can correspond to Msg3 repeat sent, may also correspond to the size and/or path loss of Msg3.
  • the configuration value is value-a (more specifically, for example, 64)
  • the repeated sending of Msg3 may indicate one or more of the following: the need to repeatedly send Msg3, the desire to repeatedly send Msg3, and the ability to repeatedly send Msg3.
  • the configuration value is value-a (more specifically, for example, 108)
  • the GroupB configuration value ra-Msg3SizeGroupA (or value-a, value-b, value-c, value-d) may also be associated with the maximum number of repetitions of Msg3.
  • value-a and value-b are used with a maximum repeat count of 8
  • value-c and value-d are used with a maximum repeat count of 16.
  • the fields used to indicate the number of repeated transmissions of Msg3 are 3 bits and 4 bits respectively.
  • a random access preamble group C (denoted as Group C), which is associated with the sending method of Msg3 repeated transmission, or Group C is used to indicate Msg3 repeated transmission, or RSRP
  • Group C is used to indicate Msg3 repeated transmission, or RSRP
  • the terminal can select the preamble in Group C for random access.
  • the specific configuration signaling example is as follows:
  • the terminal device detects that the received power RSRP of the downlink reference signal is less than the sum (or the difference between) the threshold value and the power offset value RSRPoffsetGroupC
  • the preamble in Group C may be selected for further description. random access. It should be understood that different thresholds need to be configured for different random access types and random access carriers, so it can be based on the SUL threshold or SSB threshold or Msg A threshold in the existing process, and The power offset value RSRPoffsetGroupC is used to determine the RSRP threshold for selecting Group C.
  • the RSRP threshold for selecting Group C can be expressed as "rsrp-ThresholdSSB+RSRPoffsetGroupC", therefore, when the RSRP is smaller than the "rsrp-ThresholdSSB+RSRPoffsetGroupC", the terminal The device selects the preamble in Group C for random access.
  • the RSRP threshold for selecting Group C can be expressed as "rsrp-ThresholdSSB-SUL+RSRPoffsetGroupC", therefore, when the RSRP is smaller than the "rsrp-ThresholdSSB-SUL+RSRPoffsetGroupC"
  • the terminal device selects the preamble in Group C for random access.
  • the RSRP threshold value of Group C can be expressed as "msgA-RSRP-Threshold+RSRPoffsetGroupC", therefore, when RSRP When it is less than the "msgA-RSRP-Threshold+RSRPoffsetGroupC", the terminal device selects the preamble in Group C for random access.
  • the RSRP threshold for selecting Group C can be expressed as "msgA-RSRP-ThresholdSSB+RSRPoffsetGroupC", therefore, when RSRP When it is less than the "msgA-RSRP-ThresholdSSB+RSRPoffsetGroupC", the terminal device selects the preamble in Group C for random access.
  • the foregoing solution may also be applied to a solution in which message A is repeatedly sent in a two-step random access process.
  • the terminal device determines the payload of Msg3.
  • the terminal device determines that the Msg3 is sent in the following manner: The Msg3 is sent repeatedly, otherwise the terminal device determines that the sending method of the Msg3 is: not to send the Msg3 repeatedly.
  • the terminal device can increase coverage, increase the probability of successful transmission, and reduce time delay by repeatedly sending Msg3.
  • random access preamble group C (denoted as Group C) can be configured, and the Group C is associated with the sending mode of Msg3 repeated transmission, or Group C is used to indicate Msg3 repeated transmission, wherein the field can also be configured ra-Msg3SizeGroupC is associated with the maximum number of repetitions of Msg3.
  • the terminal device When the terminal device supports repeated transmission of Msg3, and the size of Msg3 is smaller than ra-Msg3SizeGroupC, the terminal device uses the preamble in group C to perform contention-based random access, where ra-Msg3SizeGroupC is the configured threshold value.
  • the above scheme can also be applied to the scheme of repeatedly sending the message A in the two-step random access process.
  • the message A can correspond to the message 3 (Msg3) in the foregoing scheme
  • the sending method of message A is similar to the sending method of message 3, and will not be repeated here.
  • Group C can also be associated with the sending mode of repeated sending of message A, or in other words, Group C is used to instruct message A to send repeatedly.
  • the terminal device uses the preamble in group C to perform contention-based random access, where ra-MsgASizeGroupC is the configured threshold value .
  • the specific configuration signaling example is as follows:
  • the numberOfRA-PreamblesGroupA preambles are used for the random access preamble group B
  • the numberOfRA-PreamblesGroupC preambles are used for the random access preamble group C
  • the rest are used for the random access preamble group C. Randomly access the leading packet B.
  • the numberOfRA-PreamblesGroupA preambles are used for the random access preamble group B
  • the numberOfRA-PreamblesGroupC preambles are also used for the random access preamble group B
  • the rest are used for the random access preamble group B. Randomly access the leading packet C.
  • the random access preamble packet C also includes indication information of the maximum number of repetitions corresponding to the packet.
  • the field maxNumberOfRepetitionsENUMERATED ⁇ n4,n8 ⁇ in the configuration information indicates the maximum number of repetitions corresponding to the group.
  • the terminal device selects a random access preamble.
  • the terminal device selects a random access preamble in the random access preamble group/random access opportunity group.
  • the terminal device sends a random access preamble.
  • the terminal device After selecting the random access preamble, the terminal device sends the random access preamble to the network device for random access.
  • the network device determines the random access preamble group or the random access opportunity group corresponding to the random access preamble, so that the terminal device can be reasonably scheduled according to the sending method of Msg3 resources for sending Msg3 (initial transmission and/or retransmission), so that resources can be effectively used.
  • the network device can, after receiving the random access preamble from the terminal device, Random access leading group or random access opportunity grouping to determine the sending method of Msg3, that is, to determine whether the terminal device needs to repeatedly send Msg3, whether the terminal device has the ability to repeatedly send Msg3, the number of times the terminal device repeatedly sends Msg3, whether the terminal device Need to repeatedly send Msg3, whether the terminal device wants to be scheduled to repeatedly send Msg3, etc., so that the network device can reasonably schedule resources, so that the terminal device that needs to repeatedly send Msg3 (that is, the terminal device with poor coverage performance) can get enough resource repetition To send Msg3, a terminal device that does not need to repeatedly send Msg3 (that is, a terminal device with better coverage performance) can use relatively few resources, thereby improving resource utilization.
  • the terminal device determines the sending method of the random access message 3, and the sending method of the message 3 includes: the terminal device repeatedly sends the message 3, or the The terminal device does not repeatedly send message 3; the terminal device determines the random access preamble in the first random access preamble group or the first random access opportunity group according to the sending method of the message 3, and the first random access preamble group or The first random access opportunity group is associated with the sending method of the message 3, and the synchronization signal block is associated with the first random access preamble or the first random access opportunity group; the terminal device sends the network device the random access preamble.
  • the terminal device repeatedly sends the message 3, including one or more of the following situations: the terminal device wishes to repeatedly send the message 3, the terminal device has the ability to repeatedly send the message 3, and the terminal device needs to repeatedly send the message 3.
  • the terminal device wishes to be scheduled to send the message 3 repeatedly. The number of times the terminal device sends the message 3 is greater than 1 time.
  • the terminal device does not repeatedly send the message 3, including one or more of the following situations: the terminal device does not have the ability to repeatedly send the message 3, the terminal device does not need to repeatedly send the message 3, and the terminal device does not want to repeatedly send The message 3, the terminal device does not want to be scheduled to repeatedly send the message 3, and the number of times the terminal device sends the message 3 is less than or equal to 1 time.
  • the terminal device determines the sending method of Msg3, and the sending method of Msg3 is used to indicate whether to repeatedly send the Msg3 and/or the number of times to send the Msg3 , the sending method of Msg3 is associated with at least one of the following conditions: the terminal device repeatedly sends Msg3, the terminal device does not repeatedly send Msg3, the number of times the terminal device sends Msg3, the terminal device has the ability to repeatedly send Msg3, and the terminal device does not have the ability to repeatedly send Msg3 The capability of Msg3, the terminal device needs to repeatedly send Msg3, the terminal device does not need to repeatedly send Msg3, the terminal device wishes to be scheduled to repeatedly send Msg3, and the terminal device does not want to be scheduled to repeatedly send Msg3.
  • the terminal device selects a random access preamble from the first random access preamble group or the first random access opportunity group according to the sending method of the Msg3, and the first random access preamble group or the first random access opportunity group Associated with the sending manner of the Msg3, the synchronization signal block is associated with the first random access preamble or the first random access opportunity.
  • the terminal device determines the sending method of Msg3 may include: the terminal device measures the reference signal received power RSRP, and when the RSRP is smaller than the first threshold value, the terminal device determines to repeatedly send the Msg3, or the terminal device determines that the sending method of Msg3 is repeated Send Msg3.
  • the first threshold value is determined by the second threshold value and the relative threshold value, and the second threshold value is used to determine the carrier type of random access, or the random access type of random access, or the synchronization Signal fast.
  • Method 500 includes:
  • the terminal device selects a carrier.
  • the terminal device selects a random access type.
  • the terminal device selects the SSB.
  • S501-S503 are similar to S401-S403 in the method 400, and will not be repeated here.
  • the terminal device determines the sending mode of Msg3.
  • the Msg3 repetition threshold may be configured for the terminal device, and the terminal device determines the sending mode of the Msg3 according to the Msg3 repetition threshold.
  • the terminal device detects the downlink reference signal received power RSRP, and when the terminal device supports and wants to send Msg3 repeatedly, and the RSRP is smaller than the Msg3 repetition threshold, the terminal device determines that the sending method of the Msg3 is: repeat Send Msg3, otherwise the terminal device determines that the sending method of the Msg3 is: not to send the Msg3 repeatedly.
  • the terminal device can improve the transmission performance of Msg3 by repeatedly sending Msg3 when the quality of the channel link is relatively poor.
  • the Msg3 repetition threshold in the above implementation manner may be configured through a system message, or may be predefined.
  • the threshold value set in the above possible implementation methods can be the absolute threshold value directly configured by the network device to the terminal device, or it can be the relative threshold value of the terminal device, as well as the SUL threshold value, Msg A gate It is determined by any one of limit value and SSB threshold value.
  • SUL threshold value Msg A gate It is determined by any one of limit value and SSB threshold value.
  • the network device configures the absolute threshold value to the terminal device, and the corresponding signaling example is as follows:
  • Msg3Repetition-rsrp-Threshold indicates the configured absolute threshold.
  • the terminal device that supports and wishes to repeatedly send the Msg3 when the Msg3 is initially transmitted or retransmitted may determine the sending mode of the Msg3 according to the threshold value. For example, the terminal device detects the downlink reference signal received power RSRP, and when the terminal device supports and wants to send Msg3 repeatedly, and the RSRP is smaller than Msg3Repetition-rsrp-Threshold, the terminal device determines that the sending method of the Msg3 is: send Msg3 repeatedly.
  • RSRP downlink reference signal received power
  • independent thresholds need to be configured for the random access type, random access carrier, and SSB, and such a configuration method has relatively high flexibility.
  • the network device configures a relative threshold value to the terminal device, and the corresponding signaling example is as follows:
  • Msg3Repetition-rsrp-Offset indicates the configured relative threshold.
  • the number of values and specific values in the above signaling are just examples, and other values may also be used, which are not limited in this application.
  • the threshold value of the Msg3 sending method can be expressed as "rsrp-ThresholdSSB-Msg3Repetition-rsrp-Offset", therefore, when the RSRP is smaller than the "rsrp -ThresholdSSB-Msg3Repetition-rsrp-Offset", the terminal device determines that the sending method of Msg3 is: send Msg3 repeatedly.
  • the threshold value of the Msg3 transmission method can be expressed as "rsrp-ThresholdSSB-SUL-Msg3Repetition-rsrp-Offset", therefore, when the RSRP is smaller than the "rsrp-ThresholdSSB-SUL -Msg3Repetition-rsrp-Offset", the terminal device determines that the sending method of Msg3 is: send Msg3 repeatedly.
  • the threshold value of the Msg3 transmission method can be expressed as "msgA-RSRP-Threshold-Msg3Repetition-rsrp-Offset", so , when the RSRP is smaller than the "msgA-RSRP-Threshold-Msg3Repetition-rsrp-Offset", the terminal device determines that the way to send Msg3 is: send Msg3 repeatedly.
  • the threshold value of the Msg3 transmission method can be expressed as "msgA-RSRP-ThresholdSSB-Msg3Repetition-rsrp-Offset", so , when the RSRP is smaller than the "msgA-RSRP-ThresholdSSB-Msg3Repetition-rsrp-Offset", the terminal device determines that the way to send Msg3 is: repeatedly send Msg3.
  • the above is described by taking the difference between the threshold value and the relative threshold value as an example. In practice, it may also be the sum of the threshold value and the relative threshold value, which is not limited here.
  • Msg3Repetition-rsrp-Offset in this application is similar to that of field RSRPoffsetGroupC in other embodiments mentioned above, but the configuration method is different.
  • RSRPoffsetGroupC is configured in the leading group information
  • Msg3Repetition-rsrp-Offset can be configured in any other position . It can be understood that the configuration flexibility of the latter is better.
  • the terminal device determines the sending mode of Msg3, it can use any one of the relative threshold, the SUL threshold, the SSB threshold, and the Msg A threshold to determine the Msg3 repetition threshold.
  • the threshold value and the relative threshold value used by the terminal device in the previous step before determining the sending mode of Msg3 can be used to determine the Msg3 repetition threshold.
  • the terminal device determines the sending mode of Msg3 after selecting the SSB, so the terminal device can determine the repetition threshold of Msg3 according to the SSB threshold and the relative threshold.
  • the network device configures the relative threshold value to the terminal device.
  • the network device may directly configure the relative threshold to the terminal device through high-layer signaling.
  • the network device may configure an association relationship between a relative threshold value (for example, Msg3Repetition-rsrp-Offset and/or RSRPoffsetGroupC) and a parameter of a Msg3 sending mode to the terminal device.
  • a relative threshold value for example, Msg3Repetition-rsrp-Offset and/or RSRPoffsetGroupC
  • the network device configures the association relationship between the relative threshold value (Msg3Repetition-rsrp-Offset and/or RSRPoffsetGroupC) and the maximum value (maxNumberOfRepetitions) in the Msg3 repeated sending times candidate value set to the terminal device.
  • Table 1 shows an association relationship between Msg3Repetition-rsrp-Offset and maxNumberOfRepetitions.
  • K0, K1, K2, ..., H0, H1, H2, ... are non-negative integers.
  • Table 2 shows a specific example.
  • the terminal device can determine Msg3Repetition-rsrp-Offset according to maxNumberOfRepetitions and the association relationship.
  • maxNumberOfRepetitions can be determined according to the time-domain resource configuration information of message 3 (or physical uplink shared channel (physical uplink shared channel, PUSCH) time-domain resource configuration), for example, the configuration method can be:
  • the value of maxNumberOfRepetitions can be obtained as 8.
  • the network device may configure the terminal device to associate the relative threshold value (Msg3Repetition-rsrp-Offset and/or RSRPoffsetGroupC) with the number of preambles of the random access preamble group/random access opportunity group (msg3repetition-TotalNumberOfRA-Preambles) relation.
  • Msg3Repetition-rsrp-Offset and/or RSRPoffsetGroupC the number of preambles of the random access preamble group/random access opportunity group
  • Table 3 shows an association relationship between Msg3Repetition-rsrp-Offset and msg3repetition-TotalNumberOfRA-Preambles.
  • Msg3Repetition-TotalNumberOfRA-Preambles Msg3Repetition-rsrp-Offset 1 ⁇ K0 H0 K0+1 ⁇ K1 H1 K1+1 ⁇ K2 H2 ... ...
  • K0, K1, K2, ..., H0, H1, H2, ... are non-negative integers.
  • Table 4 shows a specific example.
  • the terminal device can determine Msg3Repetition-rsrp-Offset according to msg3repetition-TotalNumberOfRA-Preambles and the association relationship.
  • the network device may configure the terminal device with relative thresholds (for example, Msg3Repetition-rsrp-Offset and/or RSRPoffsetGroupC) related to the maximum transmit power capability of the terminal or the power type of the terminal.
  • the network device configures the association relationship between the relative threshold value (Msg3Repetition-rsrp-Offset and/or RSRPoffsetGroupC) and the maximum value (maxNumberOfRepetitions) in the Msg3 repeated sending times candidate value set to the terminal device.
  • Table 5 shows an association relationship between Msg3Repetition-rsrp-Offset and power type.
  • the terminal device can directly determine the random access preamble group or the random access opportunity group according to the Msg3 repetition threshold. For example, the terminal device detects the downlink reference signal received power RSRP, and when the RSRP is smaller than the repetition threshold value of Msg3, the terminal device selects the fourth random access preamble group or the fourth random access opportunity group, and the fourth random access preamble group or The fourth random access opportunity group is associated with the sending manner of repeatedly sending Msg3.
  • RSRP downlink reference signal received power
  • the relative threshold for example, Msg3Repetition-rsrp-Offset and/or RSRPoffsetGroupC
  • the relative threshold is related to the maximum transmission power capability (or terminal power type) of the terminal and the maximum number of repetitions (maxNumberOfRepetitions).
  • the relative threshold for example, Msg3Repetition-rsrp-Offset and/or RSRPoffsetGroupC
  • the relative threshold is related to the maximum transmit power capability (or terminal power type) of the terminal and the number of preambles of the group.
  • the terminal device selects a random access preamble group/or a random access opportunity group according to the sending mode of Msg3.
  • the terminal device determines a random access preamble packet according to the sending method of the Msg3, and the random access preamble group is associated with the sending method of the Msg3; or the terminal device determines a random access opportunity according to the sending method of the Msg3 Grouping, the random access opportunity grouping is associated with the sending mode of the Msg3. That is to say, the terminal device determines the random access preamble group or the random access opportunity group according to whether to repeatedly send Msg3 (and/or the number of times of sending Msg3), and then the random access preamble group or the random access opportunity group A random access preamble is determined in , and the random access preamble is used for the terminal device to perform random access.
  • the group of random access opportunities here may include multiple random access opportunities, or only one random access opportunity, that is, one random access opportunity may form a single group.
  • the random access preamble is associated with the sending method of the Msg3, which means that the random access preamble can indicate the sending method of the Msg3, or in other words, the random access preamble is used for the terminal device to repeatedly send the Msg3 random access, or the random access preamble is used for random access when the terminal device does not repeatedly send Msg3.
  • Different random access preamble packets may be configured in advance to be associated with different Msg3 sending modes.
  • two random access preamble groups Group A and Group B
  • Group B is associated with the sending method of repeatedly sending Msg3
  • the network device can indicate that the network device supports group In B, Msg3 is repeatedly transmitted.
  • the specific configuration method is similar to Group A and Group B in S404 of method 400, and will not be described again.
  • Group C is associated with the sending mode of repeated sending of Msg3 (see S404 for the configuration mode of Group C), and RSRPoffsetGroupC is a relative threshold value configured for the terminal device.
  • the RSRP obtained by measuring the SSB is denoted as SSB RSRP_measure. If SSB RSRP_measure>RSRP_thre+RSRPoffsetGroupC, and the terminal device supports repeated sending of Msg3, the terminal device can select GroupC (or can select a random access preamble in the Group).
  • RSRP_thre is any one of the following: msg3repetition-rsrp-Threshold, msg3repetition-rsrp-ThresholdSSB-SUL, msg3repetition-rsrp-ThresholdSSB, rsrp-ThresholdSSB, rsrp-ThresholdCSI-RS, msgA-RSRP-ThresholdSSB, rsrp-ThresholdSSB- Sul.
  • the random access preamble packet or the random access opportunity packet may further be used to indicate capability information of the terminal device.
  • group D (denoted as Group D) is used for terminal devices with reduced capabilities to perform random access, and terminal devices with reduced capabilities can select random access preambles in Group D.
  • the network device detects the random access preamble from the Group D, it determines that the terminal device belongs to the reduced capability category, so as to facilitate subsequent scheduling.
  • the two types of Msg3 repeated transmission (and/or repetition times) and capability reduction may jointly correspond to a random access preamble group or a random access opportunity group (for example, group E, denoted as Group E). Therefore, when the terminal device with reduced capability determines that the sending mode of Msg3 is to repeatedly send Msg3, the terminal device with reduced capability may select a random access preamble in Group E.
  • Msg3 may repeatedly send the corresponding random access preamble packet or random access opportunity packet, which is different from the random access preamble packet or random access opportunity packet corresponding to the reduced capability terminal device in one association period. in the circular association. For example, Msg3 repeatedly sends the corresponding random access preamble group or random access opportunity group, which is located in an odd-numbered cyclic association in an association period; the random access preamble group or random access opportunity group corresponding to the reduced capability terminal is located in an association In cycle associations with even numbers in the cycle.
  • Msg3 repeatedly sends the corresponding random access preamble or random access opportunity group, which is located in an even-numbered cyclic association in an association period; the random access preamble or opportunity group corresponding to the reduced capability terminal is located in an odd-numbered association period Numbered circular associations.
  • the random access preamble packet or the random access opportunity packet may further indicate the purpose of the packet (or the terminal requirement, terminal capability, etc. associated with the packet).
  • the purpose of the group F (denoted as Group F) is to repeatedly send Msg3 and reduce the capability
  • the usage configuration information can be used to indicate the purpose of Group F.
  • the usage configuration information in Group F corresponds to Msg3 repeated transmission (msg3-repetition)
  • Msg3-repetition Msg3 repeated transmission
  • reduced capacity reduced-capacity
  • the above configuration information only uses the group usage as an example, and the actual usage configuration information may also include more information, such as the starting preamble index (or ending preamble index) of the group, the number of preambles, and the like.
  • the random access preamble packet or the random access opportunity packet may further indicate multiple uses of the packet.
  • the grouping purpose of group G (denoted as Group G) is Msg3 repeated transmission and reduced capability, and the field in the configuration indicates that Group G is also used for Msg3 repeated transmission and reduced capability. At this time, when a terminal device of a reduced capability category needs to repeatedly send Msg3, it may select a random access preamble from the Group G.
  • the preamble in Group G is used for repeated transmission of message 3, and another part of the preamble is used for reducing the capability.
  • the number of preambles in the preamble group is N, which may be that the front floor (N/2) preambles are used for repeated transmission of Msg3, and the remaining N-floor (N/2) are used to reduce the capability; or it may be that the front floor(N/2) preambles are used to reduce capacity, and the remaining N-floor(N/2) are used for repeated transmission of message 3; or, odd indexed preambles are used to reduce capacity, and even indexed preambles are used for messages 3 Repeat sending.
  • the above configuration information only uses grouping as an example, and more information can be included in practice, such as the starting preamble index (or ending preamble index) and the number of preambles of the group.
  • the configuration could be:
  • the embodiments described in methods such as method 400, method 500, method 600, method 700, and method 800 can be used in other methods, for example, the scheme of configuring Group A and Group B described in method 400 can be applied In the method 500 to the method 800, the description will not be repeated.
  • Fig. 12 shows a schematic diagram of a configuration manner of a random access preamble group.
  • several random access preambles in one random access opportunity are divided into multiple groups, at least one of which is used to support repeated transmission of Msg3, or at least one of them
  • the random access preamble is used for the terminal device to perform random access when Msg3 is repeatedly sent.
  • SB1 is associated with random access opportunity y, and in random access opportunity y, the random access preamble whose random access preamble index is 0 ⁇ x is a group (denoted as group #1),
  • the random access preamble whose random access preamble index is k0 ⁇ k0+w ⁇ 1 is another group (denoted as group #2).
  • the random access opportunity y may also include other groups, which will not be described one by one here. At the same time, configure group #1 for non-repeated sending of Msg3, and group #2 for repeated sending of Msg3. Similarly, SSB0 is associated with random access opportunity 0, and in random access opportunity 0, the association relationship between the random access preamble packet and the sending mode of Msg3 may be the same as that in random access opportunity y, or may be different.
  • the group composed of the random access preamble sequence whose preamble sequence index is k0 ⁇ k0+w-1 can be used for repeated transmission of Msg3, and other groups can be used for non-repeated transmission of Msg3; it can also be the preamble
  • a group composed of random access preamble sequences with sequences 0 to x-1 is used for repeated transmission of Msg3, and other groups are used for non-repeated transmission of Msg3, which is not limited in this application.
  • the value of x or w may be determined according to the number of SSBs (or downlink signals) associated with the random access opportunity and the total number of random access preambles in the group.
  • the number of SSBs associated with a random access opportunity is N (N may be greater than 1)
  • the total number of leading packets used to support repeated transmission of Msg3 is K
  • w can be calculated according to N and K. Specifically, when K is divisible by N, that is, Then the nth SSB associated with the random access preamble packet (or random access opportunity), the corresponding preamble index range is
  • FIG. 13 shows a schematic diagram of a configuration manner of a random access opportunity.
  • part of multiple random access opportunities or a random access preamble in one random access opportunity is used to support repeated sending of Msg3.
  • SSB1 is associated with multiple random access opportunities such as random access opportunity y+1, random access opportunity n0+z, etc., where the random access preamble in random access opportunity n0+z is configured It is used for repeated transmission of Msg3, and the random access preamble in other random access opportunities is used for non-repeated transmission of Msg3.
  • SSB0 is associated with multiple random access opportunities such as random access opportunity 0 and random access opportunity n0, wherein the random access preamble in random access opportunity n0 is configured for repeated transmission of Msg3, and The random access preamble in the opportunity is used for Msg3 not to be repeatedly sent.
  • the association period between SSB and random access opportunity group or random access preamble group (for example, one association period corresponds to several random access configuration periods, and the time is an integer multiple of 5ms, or an integer number of system frames, that is, 10ms Integer multiples of , typical values can be 10ms, 20ms, 40ms, 80ms, 160ms, 320ms, 640ms, 1280ms, 2560ms, 5120ms, 10240ms), including multiple cyclic associations (for example, one cyclic association means that the SSB to be sent is complete associated once).
  • the time positions of these cyclic associations may be indicated by the network device.
  • the terminal device selects a random access preamble.
  • the terminal device selects a random access preamble in the random access preamble group/random access opportunity group.
  • the terminal device sends a random access preamble.
  • the terminal device After selecting the random access preamble, the terminal device sends the random access preamble to the network device for random access.
  • the network device determines the random access preamble group or the random access opportunity group corresponding to the random access preamble, and according to the random access preamble group or the random access opportunity group
  • the association between the packet and the sending method of Msg3 determines the sending method of Msg3, that is, determines whether Msg3 is repeatedly transmitted, and further, may also determine the number of times Msg3 is transmitted, so as to reasonably schedule resources for sending Msg3 for terminal equipment, so that resources can be effectively obtained. use.
  • the random access preamble and/or random access opportunity group (that is, random access time and frequency resources) configured by the network device for repeated transmission of Msg3 is different from that of Msg3 A random access preamble and/or random access opportunity packet that is not repeatedly transmitted.
  • the resource is indicated by an independent random access resource configuration index prach-ConfigurationIndex random access time resource.
  • the carrier index or bandwidth part (or initial uplink access bandwidth part initialUplinkBWP) where the resource is located is different from the carrier index or bandwidth part that Msg3 does not repeatedly send.
  • Msg3 repeatedly sends and Msg3 does not repeatedly send the random access preamble, and the corresponding random access response is associated with a random access-radio network temporary identity (random access-radio network temporary identity, RA-RNTI)
  • RA-RNTI random access-radio network temporary identity
  • RA-RNTI 1+s_id+14 ⁇ t_id+14 ⁇ 80 ⁇ f_id+14 ⁇ 80 ⁇ 8 ⁇ ul_carrier_id;
  • s_id is the first OFDM symbol index of the random access opportunity where the random access preamble is located (0 ⁇ s_id ⁇ 14);
  • t_id is the time slot index of the random access opportunity where the random access preamble is located (in a system frame, 0 ⁇ t_id ⁇ 80), the time slot corresponds to the subcarrier spacing of the random access preamble/opportunity/format;
  • f_id is the frequency domain index of the random access opportunity where the random access preamble is located (0 ⁇ f_id ⁇ 8), and
  • ul_carrier_id is Uplink carrier index (0 for NUL carrier, and 1 for SUL carrier).
  • message A can correspond to message 3 (Msg3) in the foregoing scheme.
  • message 3 Msg3
  • the sending method of message A and the message The sending method of 3 is similar and will not be repeated here.
  • the random access response message MSGB (or the downlink control information DCI corresponding to MSGB) of the random access preamble that MsgA does not repeatedly send is identified by the following RNTI:
  • MSGB-RNTI 1+s_id+14 ⁇ t_id+14 ⁇ 80 ⁇ f_id+14 ⁇ 80 ⁇ 8 ⁇ ul_carrier_id+14 ⁇ 80 ⁇ 8 ⁇ 2;
  • the random access response message of the random access preamble (or the downlink control information DCI corresponding to the random access response) repeatedly sent by Msg3 is identified by the following RNTI:
  • RA-RNTI 1+(s_id+1)+14 ⁇ t_id+14 ⁇ 80 ⁇ f_id+14 ⁇ 80 ⁇ 8 ⁇ ul_carrier_id;
  • RA-RNTI 2+s_id+14 ⁇ t_id+14 ⁇ 80 ⁇ f_id+14 ⁇ 80 ⁇ 8 ⁇ ul_carrier_id;
  • the random access response message MSGB (or the downlink control information DCI corresponding to MSGB) of the random access preamble sent repeatedly by MsgA is identified by the following RNTI:
  • MSGB-RNTI 1+(s_id+1)+14 ⁇ t_id+14 ⁇ 80 ⁇ f_id+14 ⁇ 80 ⁇ 8 ⁇ ul_carrier_id+14 ⁇ 80 ⁇ 8 ⁇ 2;
  • MSGB-RNTI 2+s_id+14 ⁇ t_id+14 ⁇ 80 ⁇ f_id+14 ⁇ 80 ⁇ 8 ⁇ ul_carrier_id+14 ⁇ 80 ⁇ 8 ⁇ 2; it should be understood that since the time length of existing random access opportunities is at least 2 OFDM symbols, adopting the above mechanism can avoid the random access preamble/random access opportunity response message used for different message 3 transmission methods from being confused when receiving, thus resulting in random access failure. Moreover, adopting this method will not cause the value range of the RNTI in the random access Msg2 or MsgB to be too scattered.
  • the network device can, after receiving the random access preamble from the terminal device, Random access leading group or random access opportunity grouping, determine the sending method of Msg3, that is, determine whether the terminal device needs to repeatedly send Msg3, whether the terminal device has the ability to repeatedly send Msg3, the number of times the terminal device repeatedly sends Msg3, etc., so that Network devices can reasonably schedule resources so that terminal devices that need to repeatedly send Msg3 (that is, terminal devices with poor coverage performance) can obtain enough resources to repeatedly send Msg3, and terminal devices that do not need to repeatedly send Msg3 (that is, terminal devices with relatively good coverage performance) Terminal equipment) can use relatively few resources, thereby improving resource utilization.
  • the terminal device after the terminal device selects the random access access type and/or before selecting the random access synchronization signal block, it determines the sending mode of the random access message 3, and the message 3
  • the sending method includes: the terminal device repeatedly sends message 3, or the terminal device does not repeatedly send message 3; the terminal device determines in the first random access preamble group or the first random access opportunity group according to the sending method of the message 3 A random access preamble, the first random access preamble group or the first random access opportunity group is associated with the sending mode of the message 3, the synchronization signal block is associated with the first random access preamble group or the first random access opportunity group Ingress Opportunity Packets are associated; the terminal device sends the random access preamble to the network device.
  • the terminal device repeatedly sends the message 3, including one or more of the following situations: the terminal device wishes to repeatedly send the message 3, the terminal device has the ability to repeatedly send the message 3, and the terminal device needs to repeatedly send the message 3.
  • the terminal device wishes to be scheduled to send the message 3 repeatedly, and the number of times the terminal device sends the message 3 is greater than 1.
  • the terminal device does not repeatedly send the message 3, including one or more of the following situations: the terminal device does not have the ability to repeatedly send the message 3, the terminal device does not need to repeatedly send the message 3, and the terminal device does not want to repeatedly send The message 3, the terminal device does not want to be scheduled to repeatedly send the message 3, and the number of times the terminal device sends the message 3 is less than or equal to 1 time.
  • the terminal device determines the sending method of Msg3 after selecting the access type of random access, and/or, the terminal device determines the sending method of Msg3 before selecting the SSB of the random access .
  • the sending method of the Msg3 is used to indicate whether to repeatedly send the Msg3 and/or the number of times the Msg3 is sent, and the sending method of the Msg3 is associated with at least one of the following situations: the terminal device repeatedly sends the Msg3, the terminal device does not repeatedly send the Msg3, the terminal The number of times the device sends Msg3, the terminal device has the ability to repeatedly send Msg3, the terminal device does not have the ability to repeatedly send Msg3, the terminal device needs to repeatedly send Msg3, the terminal device does not need to repeatedly send Msg3, the terminal device wants to be scheduled to repeatedly send Msg3, the terminal The device does not want to be scheduled to send Msg3 repeatedly.
  • the terminal device After selecting the SSB, the terminal device selects a random access preamble in the first random access preamble group or the first random access opportunity group, wherein the SSB is related to the first random access preamble group or the first random access opportunity group
  • the access opportunity group is associated, and the first random access preamble group or the first random access opportunity group is associated with the sending manner of the Msg3.
  • Method 600 includes:
  • the terminal device selects a carrier.
  • the terminal device selects a random access type.
  • S601-S602 are similar to S401-S402 in the method 400, and will not be repeated here.
  • the terminal device selects a sending mode of Msg3.
  • the Msg3 repetition threshold may be configured for the terminal device, and the terminal device determines the sending mode of the Msg3 according to the Msg3 repetition threshold.
  • the terminal device detects the downlink reference signal received power RSRP, and when the terminal device supports and wants to send Msg3 repeatedly, and the RSRP is smaller than the Msg3 repetition threshold, the terminal device determines that the sending method of the Msg3 is: repeat Send Msg3, otherwise the terminal device determines that the sending method of the Msg3 is: not to send the Msg3 repeatedly.
  • the terminal device can improve the transmission performance of Msg3 by repeatedly sending Msg3 when the quality of the channel link is relatively poor.
  • the terminal device determines the payload of Msg3.
  • the terminal device determines that the Msg3 is sent in the following manner: The Msg3 is sent repeatedly, otherwise the terminal device determines that the sending method of the Msg3 is: not to send the Msg3 repeatedly.
  • the terminal device can increase coverage, increase the probability of successful transmission, and reduce time delay by repeatedly sending Msg3.
  • the Msg3 repetition threshold in the above implementation manner may be configured through a system message, or may be predefined.
  • the specific configuration manner is similar to the solution described in S504 in the method 500, and will not be repeated here.
  • the terminal device selects the SSB.
  • the manner in which the terminal device selects the SSB in S604 is similar to the manner in which the terminal device selects the SSB in S403 in the method 400, but it should be noted that in S604, the SSB needs to be selected for different Msg3 sending manners.
  • the terminal device selects a random access preamble group/random access opportunity group according to the sending mode of Msg3.
  • the terminal device determines a random access preamble packet according to the sending method of the Msg3, and the random access preamble group is associated with the sending method of the Msg3; or the terminal device determines a random access opportunity according to the sending method of the Msg3 Grouping, the random access opportunity grouping is associated with the sending mode of the Msg3.
  • the configuration manner of the random access preamble group or the random access opportunity group is similar to the method introduced in part S505 of the method 500, and will not be described again.
  • the random access preamble group or the random access opportunity group may also indicate the capability information of the terminal device, or indicate the purpose of the group, and the specific manner may refer to the relevant description in the method 500, which will not be repeated here. At the same time, this solution is also applicable to other subsequent embodiments, and will not be described again.
  • the terminal device selects a random access preamble.
  • the terminal device selects a random access preamble in the random access preamble group/random access opportunity group.
  • the terminal device sends a random access preamble.
  • the terminal device After selecting the random access preamble, the terminal device sends the random access preamble to the network device for random access.
  • the network device determines the random access preamble group or the random access opportunity group corresponding to the random access preamble, and according to the random access preamble group or the random access opportunity group
  • the association between the packet and the sending method of Msg3 determines the sending method of Msg3, that is, determines whether Msg3 is repeatedly transmitted, and further, may also determine the number of times Msg3 is transmitted, so as to reasonably schedule resources for sending Msg3 for terminal equipment, so that resources can be effectively obtained. use.
  • the network device can, after receiving the random access preamble from the terminal device, Random access leading group or random access opportunity grouping, determine the sending method of Msg3, that is, determine whether the terminal device needs to repeatedly send Msg3, whether the terminal device has the ability to repeatedly send Msg3, the number of times the terminal device repeatedly sends Msg3, etc., so that Network devices can reasonably schedule resources so that terminal devices that need to repeatedly send Msg3 (that is, terminal devices with poor coverage performance) can obtain enough resources to repeatedly send Msg3, and terminal devices that do not need to repeatedly send Msg3 (that is, terminal devices with relatively good coverage performance) Terminal equipment) can use relatively few resources, thereby improving resource utilization.
  • the terminal device determines the sending mode of the message 3 of the random access, and the sending of the message 3
  • the methods include: the terminal device repeatedly sends the message 3, or the terminal device does not repeatedly send the message 3; the terminal device determines the random access in the first random access preamble group or the first random access opportunity group according to the sending method of the message 3; The first random access preamble group or the first random access opportunity group is associated with the sending method of the message 3, and the synchronization signal block is associated with the first random access preamble group or the first random access opportunity packet association; the terminal device sends the random access preamble to the network device.
  • the terminal device repeatedly sends the message 3, including one or more of the following situations: the terminal device wishes to repeatedly send the message 3, the terminal device has the ability to repeatedly send the message 3, and the terminal device needs to repeatedly send the message 3.
  • the terminal device wishes to be scheduled to send the message 3 repeatedly, and the number of times the terminal device sends the message 3 is greater than 1.
  • the terminal device does not repeatedly send the message 3, including one or more of the following situations: the terminal device does not have the ability to repeatedly send the message 3, the terminal device does not need to repeatedly send the message 3, and the terminal device does not want to repeatedly send The message 3, the terminal device does not want to be scheduled to repeatedly send the message 3, and the number of times the terminal device sends the message 3 is less than or equal to 1 time.
  • the terminal device determines the sending method of Msg3 after selecting the carrier type of random access, and/or, the terminal device determines the sending method of Msg3 before selecting the access type of random access Way.
  • the sending method of the Msg3 is used to indicate whether to repeatedly send the Msg3 and/or the number of times the Msg3 is sent, and the sending method of the Msg3 includes at least one of the following: the terminal device repeatedly sends the Msg3; the terminal device does not repeatedly send the Msg3; the terminal device sends the Msg3 The number of times; the terminal device has the ability to repeatedly send Msg3; the terminal device does not have the ability to repeatedly send Msg3, the terminal device needs to repeatedly send Msg3, the terminal device does not need to repeatedly send Msg3, the terminal device wants to be scheduled to repeatedly send Msg3, Scheduled to send Msg3 repeatedly.
  • the terminal device After selecting the random access type and SSB, the terminal device selects a random access preamble in the first random access preamble group or the first random access opportunity group, wherein the SSB and the first random access preamble group Or the first random access opportunity group is associated, and the first random access preamble group or the first random access opportunity group is associated with the sending mode of the Msg3.
  • Method 700 includes:
  • the terminal device selects a carrier.
  • S701 is similar to S401 in method 400, and will not be repeated here.
  • the terminal device selects a sending mode of Msg3.
  • the Msg3 repetition threshold may be configured for the terminal device, and the terminal device determines the sending mode of the Msg3 according to the Msg3 repetition threshold.
  • the terminal device detects the downlink reference signal received power RSRP, and when the terminal device supports and wants to send Msg3 repeatedly, and the RSRP is smaller than the Msg3 repetition threshold, the terminal device determines that the sending method of the Msg3 is: repeat Send Msg3, otherwise the terminal device determines that the sending method of the Msg3 is: not to send the Msg3 repeatedly.
  • the terminal device can improve the transmission performance of Msg3 by repeatedly sending Msg3 when the quality of the channel link is relatively poor.
  • the terminal device determines the payload of Msg3.
  • the terminal device determines that the Msg3 is sent in the following manner: The Msg3 is sent repeatedly, otherwise the terminal device determines that the sending method of the Msg3 is: not to send the Msg3 repeatedly.
  • the terminal device can increase coverage, increase the probability of successful transmission, and reduce time delay by repeatedly sending Msg3.
  • the Msg3 repetition threshold in the above implementation manner may be configured through a system message, or may be predefined.
  • the specific configuration manner is similar to the solution described in S504 in the method 500, and will not be repeated here.
  • the terminal device selects a random access type.
  • the terminal device selects the SSB.
  • S703-S704 are similar to S402-S403 in the method 400, but it should be noted that in S703 and S704, the terminal device.
  • the random access type and SSB need to be selected respectively for different sending methods of Msg3.
  • the terminal device selects a random access preamble group/random access opportunity group according to the sending mode of Msg3.
  • the terminal device determines a random access preamble packet according to the sending method of the Msg3, and the random access preamble group is associated with the sending method of the Msg3; or the terminal device determines a random access opportunity according to the sending method of the Msg3 Grouping, the random access opportunity grouping is associated with the sending mode of the Msg3.
  • the configuration manner of the random access preamble group or the random access opportunity group is similar to the method introduced in part S505 of the method 500, and will not be described again.
  • the terminal device selects a random access preamble.
  • the terminal device selects a random access preamble in the random access preamble group/random access opportunity group.
  • the terminal device sends a random access preamble.
  • the terminal device After selecting the random access preamble, the terminal device sends the random access preamble to the network device for random access.
  • the network device determines the random access preamble group or the random access opportunity group corresponding to the random access preamble, and according to the random access preamble group or the random access opportunity group
  • the association between the packet and the sending method of Msg3 determines the sending method of Msg3, that is, determines whether Msg3 is repeatedly transmitted, and further, may also determine the number of times Msg3 is transmitted, so as to reasonably schedule resources for sending Msg3 for terminal equipment, so that resources can be effectively obtained. use.
  • the random access preamble and/or random access opportunity group (that is, random access time and frequency resources) configured by the network device for repeated transmission of Msg3 is different from that of Msg3 A random access preamble and/or random access opportunity packet that is not repeatedly transmitted.
  • the resource is indicated by the independent random access resource configuration index prach-ConfigurationIndex random access time resource (the resource when Msg3 is not repeatedly sent is indicated by prach-ConfigurationIndex0, the resource when Msg3 is repeatedly sent is indicated by prach-ConfigurationIndex1 instruct).
  • the network device can, after receiving the random access preamble from the terminal device, Random access leading group or random access opportunity grouping, determine the sending method of Msg3, that is, determine whether the terminal device needs to repeatedly send Msg3, whether the terminal device has the ability to repeatedly send Msg3, the number of times the terminal device repeatedly sends Msg3, etc., so that Network devices can reasonably schedule resources so that terminal devices that need to repeatedly send Msg3 (that is, terminal devices with poor coverage performance) can obtain enough resources to repeatedly send Msg3, and terminal devices that do not need to repeatedly send Msg3 (that is, terminal devices with relatively good coverage performance) Terminal equipment) can use relatively few resources, thereby improving resource utilization.
  • the terminal device before the terminal device selects a random access carrier, it determines the sending method of the random access message 3, and the sending method of the message 3 includes: the terminal device repeatedly sends the message 3, or the terminal device Do not repeatedly send message 3; the terminal device determines the random access preamble in the first random access preamble group or the first random access opportunity group according to the sending method of the message 3, and the first random access preamble group or the first random access opportunity group
  • the random access opportunity group is associated with the sending method of the message 3
  • the synchronization signal block is associated with the first random access preamble or the first random access opportunity group; the terminal device sends the random access opportunity group to the network device into the lead.
  • the terminal device repeatedly sends the message 3, including one or more of the following situations: the terminal device wishes to repeatedly send the message 3, the terminal device has the ability to repeatedly send the message 3, and the terminal device needs to repeatedly send the message 3. The terminal device wishes to be scheduled to send the message 3 repeatedly.
  • the terminal device does not repeatedly send the message 3, including one or more of the following situations: the terminal device does not have the ability to repeatedly send the message 3, the terminal device does not need to repeatedly send the message 3, and the terminal device does not want to repeatedly send The message 3, the terminal device does not want to be scheduled to repeatedly send the message 3, and the number of times the terminal device sends the message 3 is less than or equal to 1 time.
  • the terminal device determines the sending method of Msg3 before selecting the carrier type for random access, and the sending method of Msg3 is used to indicate whether to repeatedly send the Msg3 and/or the number of times the Msg3 is sent, and the Msg3
  • the sending method is associated with at least one of the following conditions: the terminal device repeatedly sends Msg3; the terminal device does not repeatedly send Msg3; the number of times the terminal device sends Msg3; the terminal has the ability to repeatedly send Msg3; the terminal does not have the ability to repeatedly send Msg3
  • the device needs to repeatedly send Msg3, the terminal device does not need to repeatedly send Msg3, the terminal device wishes to be scheduled to repeatedly send Msg3, and the terminal device does not want to be scheduled to repeatedly send Msg3.
  • the terminal device selects a random access preamble from the first random access preamble group or the first random access opportunity group according to the sending method of the Msg3, and the first random access preamble group or the first random access opportunity group is related to the The sending method of the Msg3 is associated.
  • Method 800 includes:
  • the terminal device selects a sending mode of Msg3.
  • the Msg3 repetition threshold may be configured for the terminal device, and the terminal device determines the sending mode of the Msg3 according to the Msg3 repetition threshold.
  • the terminal device detects the downlink reference signal received power RSRP, and when the terminal device supports and wants to send Msg3 repeatedly, and the RSRP is smaller than the Msg3 repetition threshold, the terminal device determines that the sending method of the Msg3 is: repeat Send Msg3, otherwise the terminal device determines that the sending method of the Msg3 is: not to send the Msg3 repeatedly.
  • the terminal device can improve the transmission performance of Msg3 by repeatedly sending Msg3 when the quality of the channel link is relatively poor.
  • the terminal device determines the payload of Msg3.
  • the terminal device determines that the Msg3 is sent in the following manner: The Msg3 is sent repeatedly, otherwise the terminal device determines that the sending method of the Msg3 is: not to send the Msg3 repeatedly.
  • the terminal device can increase coverage, increase the probability of successful transmission, and reduce time delay by repeatedly sending Msg3.
  • the Msg3 repetition threshold in the above implementation manner may be configured through a system message, or may be predefined.
  • the specific configuration manner is similar to the solution described in S504 in the method 500, and will not be repeated here.
  • the terminal device selects a carrier type.
  • the terminal device selects the SSB.
  • the terminal device selects a random access type.
  • S802-S804 are similar to S401-S403 in method 400, but it should be noted that in S802-S804, the terminal device needs to select the carrier type, random access type and SSB respectively for different Msg3 sending methods.
  • the terminal device selects a random access preamble group/random access opportunity group according to the sending mode of Msg3.
  • the terminal device determines a random access preamble packet according to the sending method of the Msg3, and the random access preamble group is associated with the sending method of the Msg3; or the terminal device determines a random access opportunity according to the sending method of the Msg3 Grouping, the random access opportunity grouping is associated with the sending mode of the Msg3.
  • the configuration mode of the random access preamble group or the random access opportunity group is similar to the method introduced in part S505 of the method 500, and will not be described repeatedly.
  • the terminal device selects a random access preamble.
  • the terminal device selects a random access preamble in the random access preamble group/random access opportunity group.
  • the terminal device sends a random access preamble.
  • the terminal device After selecting the random access preamble, the terminal device sends the random access preamble to the network device for random access.
  • the network device determines the random access preamble group or the random access opportunity group corresponding to the random access preamble, and according to the random access preamble group or the random access opportunity group
  • the association between the packet and the sending method of Msg3 determines the sending method of Msg3, that is, determines whether Msg3 is repeatedly transmitted, and further, may also determine the number of times Msg3 is transmitted, so as to reasonably schedule resources for sending Msg3 for terminal equipment, so that resources can be effectively obtained. use.
  • the network device can Access the leading group or random access opportunity to determine the sending method of Msg3, that is, determine whether the terminal device needs to repeatedly send Msg3, whether the terminal device has the ability to repeatedly send Msg3, the number of times the terminal device repeatedly sends Msg3, etc., so that the network device Resources can be reasonably scheduled so that terminal devices that need to repeatedly send Msg3 (that is, terminal devices with relatively poor coverage performance) can obtain enough resources to repeatedly send Msg3, and terminal devices that do not need to repeatedly send Msg3 (that is, terminal devices with relatively good coverage performance) ) can take relatively few resources, thereby improving resource utilization.
  • the random access preamble group or the random access opportunity group is associated with the sending mode of the message 3, and the terminal device can select the random access preamble group or the random access opportunity group to indicate whether to send message 3 repeatedly.
  • the random access preamble or the random access opportunity can also be associated with whether the terminal device reduces its capability, and the terminal device can indicate whether the terminal device is required by selecting a random access preamble group or a random access opportunity group
  • the "transmission method of message 3" in the above scheme can be replaced with "capability type of terminal device”, and "repeated sending of message 3" can be replaced with "reduced capability”, forming
  • the specific implementation is similar, and the description will not be repeated; or, in the above solution, replace the "method of sending message 3" with "capability type of the terminal device", and replace “repeated sending of message A" with “reduce Capability” forms a new embodiment, and the specific implementation is similar, and will not be described again.
  • the "2-step RA" in the above solution can also be replaced with "reduced capability", which corresponds to the 4-step RA solution, thus forming a new embodiment.
  • the specific implementation method is similar, and no longer Repeat
  • Fig. 20 is a schematic block diagram of a communication device provided by an embodiment of the present application.
  • the communication device 10 may include a transceiver module 11 and a processing module 12 .
  • the communication device 10 may correspond to the terminal device in the foregoing method embodiments.
  • the communication device 10 may correspond to the terminal device in the method 400 to the method 800 according to the embodiment of the present application, and the communication device 10 may include a module for executing the method performed by the terminal device in the method 400 to the method 800 . Moreover, each module in the communication device 10 and the above-mentioned other operations and/or functions are for realizing corresponding processes of the method 400 to the method 800 respectively.
  • the transceiver module 11 in the communication device 10 performs the receiving and sending operations performed by the terminal equipment in the above method embodiments, and the processing module 12 performs operations other than the receiving and sending operations.
  • FIG. 21 is a schematic diagram of a communication device 20 provided in an embodiment of the present application.
  • the device 20 may be a terminal device in methods 400 to 800.
  • the device 20 may include a processor 21 (ie, an example of a processing module) and a memory 22 .
  • the memory 22 is used to store instructions
  • the processor 21 is used to execute the instructions stored in the memory 22, so that the apparatus 20 implements the steps executed by the terminal device in the method 400 to the method 800.
  • the device 20 may also include an input port 23 (ie, an example of a transceiver module) and an output port 24 (ie, another example of a transceiver module).
  • the processor 21 , the memory 22 , the input port 23 and the output port 24 can communicate with each other through internal connection paths, and transmit control and/or data signals.
  • the memory 22 is used to store a computer program, and the processor 21 can be used to call and run the computer program from the memory 22, to control the input port 23 to receive signals, and to control the output port 24 to send signals, so as to complete the network device in the above method step.
  • the memory 22 can be integrated in the processor 21 or can be set separately from the processor 21 .
  • the input port 23 is a receiver
  • the output port 24 is a transmitter.
  • the receiver and the transmitter may be the same or different physical entities. When they are the same physical entity, they can be collectively referred to as transceivers.
  • the input port 23 is an input interface
  • the output port 24 is an output interface
  • the functions of the input port 23 and the output port 24 may be realized by a transceiver circuit or a dedicated chip for transceiver.
  • the processor 21 may be realized by a dedicated processing chip, a processing circuit, a processor or a general-purpose chip.
  • a general-purpose computer to implement the communication device provided in the embodiment of the present application.
  • the program codes to realize the functions of the processor 21 , the input port 23 and the output port 24 are stored in the memory 22 , and the general processor realizes the functions of the processor 21 , the input port 23 and the output port 24 by executing the codes in the memory 22 .
  • FIG. 22 is a schematic structural diagram of a communication device 30 provided by the present application. For ease of illustration, FIG. 22 shows only the main components of the communication device. As shown in FIG. 22 , the communication device 30 includes a processor, a memory, a control circuit, an antenna, and an input and output device.
  • the processor is mainly used to process the communication protocol and communication data, and to control the entire terminal device, execute the software program, and process the data of the software program. described action.
  • the memory is mainly used for storing software programs and data, such as storing the codebook described in the above embodiments.
  • the control circuit is mainly used for conversion of baseband signal and radio frequency signal and processing of radio frequency signal.
  • the control circuit and the antenna can also be called a transceiver, which is mainly used to send and receive radio frequency signals in the form of electromagnetic waves.
  • Input and output devices such as touch screens, display screens, and keyboards, are mainly used to receive data input by users and output data to users.
  • the processor can read the software program in the storage unit, interpret and execute the instructions of the software program, and process the data of the software program.
  • the processor performs baseband processing on the data to be sent, and then outputs the baseband signal to the radio frequency circuit.
  • the radio frequency circuit performs radio frequency processing on the baseband signal and sends the radio frequency signal through the antenna in the form of electromagnetic waves.
  • the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, and the processor converts the baseband signal into data and processes the data.
  • FIG. 22 only shows a memory and a processor. In an actual terminal device, there may be multiple processors and memories.
  • a storage may also be called a storage medium or a storage device, etc., which is not limited in this embodiment of the present application.
  • the processor may include a baseband processor and a central processing unit, the baseband processor is mainly used to process communication protocols and communication data, and the central processor is mainly used to control the entire terminal device, execute A software program that processes data for a software program.
  • the processor in FIG. 22 integrates the functions of the baseband processor and the central processing unit.
  • the baseband processor and the central processing unit may also be independent processors, interconnected through technologies such as a bus.
  • a terminal device may include multiple baseband processors to adapt to different network standards, a terminal device may include multiple central processors to enhance its processing capability, and various components of the terminal device may be connected through various buses.
  • the baseband processor may also be expressed as a baseband processing circuit or a baseband processing chip.
  • the central processing unit may also be expressed as a central processing circuit or a central processing chip.
  • the function of processing the communication protocol and communication data can be built in the processor, or can be stored in the storage unit in the form of a software program, and the processor executes the software program to realize the baseband processing function.
  • the communication device 30 includes a transceiver unit 31 and a processing unit 32 .
  • the transceiver unit may also be referred to as a transceiver, a transceiver, a transceiver device, and the like.
  • the device in the transceiver unit 31 for realizing the receiving function can be regarded as a receiving unit
  • the device in the transceiver unit 31 for realizing the sending function can be regarded as a sending unit, that is, the transceiver unit 31 includes a receiving unit and a sending unit.
  • the transceiving unit 31 may include a sending unit and/or a receiving unit, the sending unit is configured to perform the sending-related operations performed by the terminal device in the above method embodiments, and the receiving unit is used to execute the terminal device in the above method embodiments Receive-related operations performed by the device.
  • the receiving unit may also be called a receiver, receiver, receiving circuit, etc.
  • the sending unit may be called a transmitter, transmitter, or transmitting circuit, etc.
  • the terminal device shown in FIG. 22 may perform the actions performed by the terminal device in the foregoing method 400 to method 800.
  • detailed description thereof is omitted.
  • the embodiment of the present application further provides a computer-readable storage medium, on which computer instructions for implementing the method executed by the first network device in the above method embodiment are stored.
  • the computer program when executed by a computer, the computer can implement the method performed by the network device in the foregoing method embodiments.
  • the embodiments of the present application also provide a computer program product including instructions, which, when executed by a computer, enable the computer to implement the method executed by the first device or the method executed by the second device in the above method embodiments.
  • An embodiment of the present application further provides a communication system, where the communication system includes the network device in the foregoing embodiments.
  • the network device may include a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer.
  • the hardware layer may include hardware such as a central processing unit (central processing unit, CPU), a memory management unit (memory management unit, MMU), and memory (also called main memory).
  • the operating system of the operating system layer can be any one or more computer operating systems that implement business processing through processes, for example, Linux operating system, Unix operating system, Android operating system, iOS operating system, or windows operating system.
  • the application layer may include applications such as browsers, address books, word processing software, and instant messaging software.
  • the embodiment of the present application does not specifically limit the specific structure of the execution subject of the method provided in the embodiment of the present application, as long as the program that records the code of the method provided in the embodiment of the present application can be executed according to the method provided in the embodiment of the present application Just communicate.
  • the execution subject of the method provided by the embodiment of the present application may be a network device, or a functional module in the network device that can call a program and execute the program.
  • article of manufacture may encompass a computer program accessible from any computer readable device, carrier or media.
  • computer-readable media may include, but are not limited to, magnetic storage devices (e.g., hard disk, floppy disk, or magnetic tape, etc.), optical disks (e.g., CD, DVD), smart cards, and flash memory devices (e.g., erasable programmable read-only memory EPROM), card, stick or key drive, etc.).
  • Various storage media described herein can represent one or more devices and/or other machine-readable media for storing information.
  • the term "machine-readable medium” may include, but is not limited to, wireless channels and various other media capable of storing, containing and/or carrying instructions and/or data.
  • processors mentioned in the embodiment of the present application may be a central processing unit CPU, or other general-purpose processors, digital signal processors (digital signal processor, DSP), application specific integrated circuits (application specific integrated circuits, ASICs) ), off-the-shelf programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.
  • DSP digital signal processor
  • ASICs application specific integrated circuits
  • FPGA field programmable gate array
  • a general-purpose processor may be a microprocessor, or the processor may be any conventional processor, or the like.
  • the memory mentioned in the embodiments of the present application may be a volatile memory or a nonvolatile memory, or may include both volatile and nonvolatile memories.
  • the non-volatile memory can be read-only memory (read-only memory, ROM), programmable read-only memory (programmable ROM, PROM), EPROM, electrically erasable programmable read-only memory (electrically EPROM, EEPROM) or flash memory.
  • the volatile memory may be random access memory (RAM).
  • RAM can be used as an external cache.
  • RAM may include the following forms: static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), synchronous dynamic random access memory (synchronous DRAM, SDRAM) , double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory (synchlink DRAM, SLDRAM) and Direct memory bus random access memory (direct rambus RAM, DR RAM).
  • static random access memory static random access memory
  • dynamic RAM dynamic random access memory
  • DRAM synchronous dynamic random access memory
  • SDRAM synchronous DRAM
  • double data rate SDRAM double data rate SDRAM
  • DDR SDRAM double data rate SDRAM
  • ESDRAM enhanced synchronous dynamic random access memory
  • SLDRAM synchronous connection dynamic random access memory
  • Direct memory bus random access memory direct rambus RAM, DR RAM
  • the processor is a general-purpose processor, DSP, ASIC, FPGA or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components
  • the memory storage module may be integrated in the processor.
  • memories described herein are intended to include, but are not limited to, these and any other suitable types of memories.
  • the disclosed devices and methods may be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to implement the solutions provided in this application.
  • each functional unit in each embodiment of the present application may be integrated into one unit, each unit may exist separately physically, or two or more units may be integrated into one unit.
  • the computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable devices.
  • the computer may be a personal computer, a server, or a network device.
  • the computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website, computer, server, or data center Transmission to another website site, computer, server, or data center by wired (eg, coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (eg, infrared, wireless, microwave, etc.).
  • the computer-readable storage medium may be any available medium that can be accessed by a computer, or a data storage device such as a server or a data center integrated with one or more available media.
  • the available medium may be a magnetic medium, (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, DVD), or a semiconductor medium (for example, a solid state disk (SSD)).
  • a magnetic medium for example, a floppy disk, a hard disk, a magnetic tape
  • an optical medium for example, DVD
  • a semiconductor medium for example, a solid state disk (SSD)
  • the aforementioned available The medium may include, but is not limited to: various media capable of storing program codes such as a USB flash drive, a mobile hard disk, a read-only memory ROM, a random access memory RAM, a magnetic disk or an optical disk.

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Abstract

本申请提供了一种随机接入的方法和装置，该方法包括：终端设备在至少两个随机接入前导分组中确定第一随机接入前导分组，该至少两个随机接入前导分组与随机接入过程的消息3的发送方式相关联，该消息3的发送方式包括以下：该终端设备重复发送该消息3，或者该终端设备不重复发送该消息3，该至少两个随机接入前导分组中至少有一个随机接入前导分组与该终端设备重复发送该消息3的发送方式相关联；该终端设备在该第一随机接入前导分组确定随机接入前导；该终端设备向网络设备发送该随机接入前导。因此，网络设备可以根据该随机接入前导所在的随机接入前导分组确定该消息3的发送方式，从而可以合理配置资源。

Description

随机接入的方法和装置
本申请要求于2021年08月20日提交中国专利局、申请号为202110963322.6、申请名称为“随机接入的方法和装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信领域，并且更加具体地，涉及一种随机接入的方法和装置。
背景技术
在LTE或5G有接入控制的通信系统中，希望接入网络的设备可以通过随机接入过程与基站建立连接。在4步随机接入过程中，可以采用重复传输消息3(Msg3)的方式来增强覆盖。如何根据消息3的发送方式来确定随机接入前导，使得网络设备可以根据Msg3的发送方式合理调度资源是当前亟待解决的问题。
发明内容
本申请提供一种随机接入的方法和装置，使得终端设备可以根据消息3的发送方式确定随机接入前导，以便网络设备可以根据消息3的发送方式合理调度资源。
第一方面，提供了一种随机接入的方法，该方法包括：终端设备在至少两个随机接入前导分组中确定第一随机接入前导分组，该至少两个随机接入前导分组与消息3的发送方式相关联，该消息3用于随机接入，该消息3的发送方式包括：该终端设备重复发送该消息3，或者该终端设备不重复发送该消息3，该至少两个随机接入前导分组中至少有一个随机接入前导分组与该终端设备重复发送该消息3相关联；该终端设备在该第一随机接入前导分组确定随机接入前导；该终端设备向网络设备发送该随机接入前导。
其中，该终端设备重复发送该消息3，包括以下一种或多种情况：该终端设备希望重复发送该消息3、该终端设备具备重复发送该消息3的能力、该终端设备需要重复发送该消息3、该终端设备希望被调度重复发送该消息3、该终端设备发送该消息3的次数大于1次。
该终端设备不重复发送该消息3，包括以下一种或多种情况：该终端设备不具备重复发送该消息3的能力，该终端设备不需要重复发送该消息3、该终端设备不希望重复发送该消息3、该终端设备不希望被调度重复发送该消息3、该终端设备的发送该消息3的次数小于或等于1次。
结合第一方面，在第一方面的某些实现方式中，终端设备在至少两个随机接入前导分组中确定第一随机接入前导分组，该至少两个随机接入前导分组与以下至少一种方式相关联：终端设备重复发送该消息3、终端设备不重复发送该消息3、终端设备发送该消息3的次数、终端设备具备重复发送该消息3的能力、终端设备不具备重复发送该消息3的能 力、终端设备需要重复发送该消息3、终端设备不需要重复发送该消息3、终端设备希望被调度重复发送该消息3、终端设备不希望被调度重复发送该消息3，该至少两个随机接入前导分组中至少有一个随机接入前导分组与终端设备重复发送该消息3的发送方式相关联；该终端设备在该第一随机接入前导分组确定随机接入前导。
在上述方案中，终端设备可以在选择同步信号块之后便在至少两个随机接入前导分组中来进行选择。
基于上述方案，终端设备在至少两个随机接入前导分组中选择随机接入前导分组，其中该至少两个随机接入前导分组中至少有一个随机接入前导分组与终端设备重复发送消息3的发送方式相关联，或者说，该至少两个随机接入前导分组中至少有一个随机接入前导分组用于指示消息3的重复发送，因此，终端设备选择了随机接入前导分组之后，在后续随机接入的流程中，网络设备可以根据该随机接入前导分组确定消息3是否需要重复发送，或者说，网络设备可以根据该随机接入前导分组确定消息3的发送方式，因此，网络设备可以根据消息3是否重复发送(或者说是消息3的发送方式)来为终端设备合理调度资源，从而可以提高资源利用率。
结合第一方面，在第一方面的某些实现方式中，该终端设备在至少两个随机接入前导分组中确定第一随机接入前导分组，包括：该终端设备接收来自网络设备的指示信息；该终端设备根据该指示信息确定该第一随机接入前导分组与终端设备重复发送该消息3的发送方式相关联；当该消息3的发送方式为该终端设备重复发送该消息3，该终端设备在至少两个随机接入前导分组中确定该第一随机接入前导分组。
在上述方案中，终端设备在选择了同步信号块之后，根据网络设备的指示，确定第一随机接入前导分组与终端设备重复发送消息3的发送方式相关联，或者说，终端设备根据网络设备的指示，确定第一随机接入前导分组用于指示消息3的重复发送，或者说，终端设备根据网络设备的指示，确定网络设备支持通过该第一随机接入前导分组进行消息3的重复传输。进一步地，当该终端设备要重复发送该消息3，则该终端设备选择该第一随机接入前导分组。然后终端设备向网络设备发送该第一随机接入前导分组中的一个随机接入前导，网络设备根据该随机接入前导确定消息3的发送方式为终端设备重复发送消息3，因此可以为该消息3的传输合理调度资源。
结合第一方面，在第一方面的某些实现方式中，该终端设备在至少两个随机接入前导分组中确定第一随机接入前导分组，包括：该终端设备测量参考信号接收功率RSRP；当该RSRP小于第一门限值，该终端设备在该至少两个随机接入前导分组中确定该第一随机接入前导分组，该第一随机接入前导分组与终端设备重复发送该消息3的发送方式相关联，该第一门限值由第二门限值和相对门限值确定，该第二门限值用于确定该随机接入的载波类型或该随机接入的随机接入类型或该同步信号块。
应理解，该相对门限值可以为现有的随机接入流程中的用于确定随机接入的载波类型或随机接入的随机接入类型或同步信号块等的门限值。因此在该方案中，只需要为该终端设备配置一个相对门限值，终端设备即可根据现有的门限值和相对门限值确定该第一门限值，而不需要针对每一种情况配置一个单独的门限值，从而可以节约信令开销。
在上述方案中，终端设备在选择了同步信号块之后，测量RSRP，当RSRP满足预设条件，则选择与终端设备重复发送消息3的发送方式相关联的第一随机接入前导分组。然 后终端设备向网络设备发送该第一随机接入前导分组中的一个随机接入前导，网络设备根据该随机接入前导确定消息3的发送方式为终端设备重复发送消息3，因此可以为该消息3的传输合理调度资源。
另一方面，针对上述方案，终端设备可以根据相对门限值以及第二门限值来确定第一门限值，因此针对不同的载波、不同的接入类型、不同的同步信号块，终端设备均可以采用这种方式来确定第一门限值，而不需要针对每一种情况配置一个单独的门限值，从而可以节约信令开销。
上述两种确定随机接入前导分组的方式可以结合。结合第一方面，在第一方面的某些实现方式中，该终端设备在至少两个随机接入前导分组中确定第一随机接入前导分组，包括：该终端设备接收来自网络设备的指示信息；该终端设备根据该指示信息确定该第一随机接入前导分组与终端设备重复发送该消息3的发送方式相关联；该终端设备测量参考信号接收功率RSRP；当该RSRP小于第一门限值，该终端设备在该至少两个随机接入前导分组中选择该第一随机接入前导分组。
上述方案中的随机接入前导分组还可以替换为随机接入机会分组，即还可以按照随机接入机会将不同的随机接入前导进行分组，或者按照不同的随机接入机会关联不同的消息3的发送方式，具体方案类似，不再赘述。
结合第一方面，在第一方面的某些实现方式中，该方法还包括：该终端设备根据该消息3的最大重复发送次数确定该相对门限值，该消息3的最大重复发送次数与该相对门限值相关联；或者，该终端设备根据该第一随机接入前导分组中的随机接入前导的数量确定该相对门限值，该第一随机接入前导分组中的随机接入前导的数量与该相对门限值相关联；或者，该终端设备根据该第一随机接入机会分组中的随机接入前导的数量确定该相对门限值，该第一随机接入机会分组中的随机接入前导的数量与该相对门限值相关联；或者，该终端设备根据该终端设备的最大发送功率能力或功率类型确定所述相对门限值，该终端设备的最大发送功率能力或功率类型与所述相对门限值相关联。
基于上述方案，终端设备可以根据消息3的最大重复发送次数或随机接入前导分组中的随机接入前导的数量、或随机接入机会分组中随机接入前导的数量确定相对门限值，因此无需专门的信令开配置相对门限值，从而可以节约信令开销。
第二方面，提供了一种随机接入的方法，该方法包括：终端设备在选择随机接入的同步信号块之后，确定该随机接入的消息3的发送方式，该消息3的发送方式包括：该终端设备重复发送消息3，或终端设备不重复发送消息3；该终端设备根据该消息3的发送方式，在第一随机接入前导分组或第一随机接入机会分组确定随机接入前导，该第一随机接入前导分组或第一随机接入机会分组与该消息3的发送方式相关联，该同步信号块与该第一随机接入前导分组或者该第一随机接入机会分组相关联；该终端设备向网络设备发送该随机接入前导。
其中，该终端设备重复发送该消息3，包括以下一种或多种情况：该终端设备希望重复发送该消息3、该终端设备具备重复发送该消息3的能力、该终端设备需要重复发送该消息3、该终端设备希望被调度重复发送该消息3、该终端设备发送该消息3的次数大于1次。
该终端设备不重复发送该消息3，包括以下一种或多种情况：该终端设备不具备重复 发送该消息3的能力，该终端设备不需要重复发送该消息3、该终端设备不希望重复发送该消息3、该终端设备不希望被调度重复发送该消息3、该终端设备的发送该消息3的次数小于或等于1次。
结合第二方面，在第二方面的某些实现方式中，终端设备在选择随机接入的同步信号块之后，确定该随机接入的消息3的发送方式，该消息3的发送方式用于指示是否重复发送该消息3，该消息3的发送方式与以下至少一种情况相关联：终端设备重复发送消息3、终端设备不重复发送消息3、终端设备发送消息3的次数、终端设备具备重复发送消息3的能力、终端设备不具备重复发送消息3的能力、终端设备需要重复发送该消息3、终端设备不需要重复发送该消息3、终端设备希望被调度重复发送该消息3、终端设备不希望被调度重复发送该消息3；该终端设备根据该消息3的发送方式，在第一随机接入前导分组或第一随机接入机会分组确定随机接入前导，该第一随机接入前导分组或第一随机接入机会分组与该消息3的发送方式相关联，该同步信号块与该第一随机接入前导分组或者该第一随机接入机会分组相关联。
基于上述方案，终端设备可以先确定消息3的发送方式，然后根据该消息3的发送方式来选择随机接入前导分组或随机接入机会分组，其中，该随机接入前导分组或该随机接入前导机会分组与消息3的发送方式向关联，也就是说，终端设备根据消息3的发送方式，选择与该消息3的发送方式相关联的随机接入前导分组或随机接入机会分组。同时，在该实现方式中，终端设备可以在选择同步信号块之后，确定消息3的发送方式。这样，在后续的随机接入流程中，网络设备可以根据终端设备选择的随机接入前导分组或随机接入机会分组来确定消息3的发送方式，从而可以更有针对性的为终端设备调度资源，有利于资源的有效利用。
结合第二方面，在第二方面的某些实现方式中，该终端设备在选择随机接入的同步信号块之后，确定该随机接入的消息3的发送方式，包括：该终端设备测量参考信号接收功率RSRP；当该RSRP小于第一门限值，该终端设备确定重复发送该消息3，该第一门限值由第二门限值和相对门限值确定，该第二门限值用于确定该随机接入的载波类型或该随机接入的随机接入类型或该同步信号块。
基于上述方案，终端设备可以根据相对门限值和第二门限值来确定第一门限值，然后根据第一门限值来确定消息3的发送方式。在这种方案下，网络设备只需要为终端设备配置一个相对门限值，终端设备便可以根据该相对门限值和其他现有门限值确定第一门限值，而无需为每一种情况(不同的载波类型、不同的随机接入方式、不同的同步信号块等)分配独立的门限值，从而可以节省信令开销。
结合第二方面，在第二方面的某些实现方式中，该方法还包括：该终端设备根据该消息3的最大重复发送次数确定该相对门限值，该消息3的最大重复发送次数与该相对门限值相关联；或者，该终端设备根据该第一随机接入前导分组中的随机接入前导的数量确定该相对门限值，该第一随机接入前导分组中的随机接入前导的数量与该相对门限值相关联；或者，该终端设备根据该第一随机接入机会分组中的随机接入前导的数量确定该相对门限值，该第一随机接入机会分组中的随机接入前导的数量与该相对门限值相关联；或者，该终端设备根据该终端设备的最大发送功率能力或功率类型确定所述相对门限值，该终端设备的最大发送功率能力或功率类型与所述相对门限值相关联。
基于上述方案，终端设备可以根据消息3的最大重复发送次数或随机接入前导分组中的随机接入前导的数量、或随机接入机会分组中随机接入前导的数量确定相对门限值，因此无需专门的信令开配置相对门限值，从而可以节约信令开销。
结合第二方面，在第二方面的某些实现方式中，该终端设备在选择随机接入的同步信号块之后，确定该随机接入的消息3的发送方式，包括：该终端设备接收来自网络设备的指示信息，该指示信息用于指示该网络设备是否支持重复传输该消息3；当该网络设备支持重复传输该消息3，且该终端设备需要且支持重复发送该消息3时，该终端设备确定重复发送该消息3。
第三方面，提供了一种随机接入的方法，该方法包括：终端设备在选择随机接入的接入类型之后，和/或选择该随机接入的同步信号块之前，确定该随机接入的消息3的发送方式，该消息3的发送方式包括：该终端设备重复发送消息3，或终端设备不重复发送消息3；该终端设备根据该消息3的发送方式，在第一随机接入前导分组或第一随机接入机会分组确定随机接入前导，该第一随机接入前导分组或第一随机接入机会分组与该消息3的发送方式相关联，该同步信号块与该第一随机接入前导分组或者该第一随机接入机会分组相关联；该终端设备向网络设备发送该随机接入前导。
其中，该终端设备重复发送该消息3，包括以下一种或多种情况：该终端设备希望重复发送该消息3、该终端设备具备重复发送该消息3的能力、该终端设备需要重复发送该消息3、该终端设备希望被调度重复发送该消息3、该终端设备发送该消息3的次数大于1次。
该终端设备不重复发送该消息3，包括以下一种或多种情况：该终端设备不具备重复发送该消息3的能力，该终端设备不需要重复发送该消息3、该终端设备不希望重复发送该消息3、该终端设备不希望被调度重复发送该消息3、该终端设备的发送该消息3的次数小于或等于1次。
结合第三方面在，在第三方面的某些实现方式中，终端设备在选择随机接入的接入类型之后，和/或在选择该随机接入的SSB之前，确定消息3的发送方式，该消息3的发送方式用于指示是否重复发送该消息3，该消息3的发送方式与以下至少一种情况相关联：终端设备重复发送消息3、终端设备不重复发送消息3、终端设备发送消息3的次数、终端设备具备重复发送消息3的能力、终端设备不具备重复发送消息3的能力、终端设备需要重复发送该消息3、终端设备不需要重复发送该消息3、终端设备希望被调度重复发送该消息3、终端设备不希望被调度重复发送该消息3；该终端设备根据该消息3的发送方式，在第一随机接入前导分组或第一随机接入机会分组确定随机接入前导，该第一随机接入前导分组或第一随机接入机会分组与该消息3的发送方式相关联，该同步信号块与该第一随机接入前导分组或者该第一随机接入机会分组相关联。
在该实现方式中，终端设备在选择随机接入类型之后，和/或在选择该随机接入的SSB之前，确定消息3的发送方式，然后选择与该消息3的发送方式相关联的随机接入前导分组或随机接入机会分组，这样，在后续的随机接入流程中，网络设备可以根据终端设备选择的随机接入前导分组或随机接入机会分组来确定消息3的发送方式，从而可以更有针对性的为终端设备调度资源，有利于资源的有效利用。
第四方面，提供了一种随机接入的方法，该方法包括：终端设备在选择随机接入的载 波之后，和/或选择该随机接入的接入类型之前，确定该随机接入的消息3的发送方式，该消息3的发送方式包括：该终端设备重复发送消息3，或终端设备不重复发送消息3；该终端设备根据该消息3的发送方式，在第一随机接入前导分组或第一随机接入机会分组确定随机接入前导，该第一随机接入前导分组或第一随机接入机会分组与该消息3的发送方式相关联，该同步信号块与该第一随机接入前导分组或者该第一随机接入机会分组相关联；该终端设备向网络设备发送该随机接入前导。
其中，该终端设备重复发送该消息3，包括以下一种或多种情况：该终端设备希望重复发送该消息3、该终端设备具备重复发送该消息3的能力、该终端设备需要重复发送该消息3、该终端设备希望被调度重复发送该消息3、该终端设备发送该消息3的次数大于1次。
该终端设备不重复发送该消息3，包括以下一种或多种情况：该终端设备不具备重复发送该消息3的能力，该终端设备不需要重复发送该消息3、该终端设备不希望重复发送该消息3、该终端设备不希望被调度重复发送该消息3、该终端设备的发送该消息3的次数小于或等于1次。
结合第四当面，在第四方面的某些实现方式中，终端设备在选择随机接入的载波之后，和/或，该终端设备在选择该随机接入的接入类型之前，确定消息3的发送方式，该消息3的发送方式用于指示是否重复发送该消息3；该消息3的发送方式与以下至少一种情况相关联：终端设备重复发送消息3、终端设备不重复发送消息3、终端设备发送消息3的次数、终端设备具备重复发送消息3的能力、终端设备不具备重复发送消息3的能力、终端设备需要重复发送该消息3、终端设备不需要重复发送该消息3、终端设备希望被调度重复发送该消息3、终端设备不希望被调度重复发送该消息3；该终端设备根据该消息3的发送方式，在第一随机接入前导分组或第一随机接入机会分组确定随机接入前导，该第一随机接入前导分组或第一随机接入机会分组与该消息3的发送方式相关联，该同步信号块与该第一随机接入前导分组或者该第一随机接入机会分组相关联。
在该实现方式中，终端设备在选择随机接入的载波之后，和/或，该终端设备在选择该随机接入的接入类型之前，确定消息3的发送方式，然后选择与该消息3的发送方式相关联的随机接入前导分组或随机接入机会分组，这样，在后续的随机接入流程中，网络设备可以根据终端设备选择的随机接入前导分组或随机接入机会分组来确定消息3的发送方式，从而可以更有针对性的为终端设备调度资源，有利于资源的有效利用。
第五方面，提供了一种随机接入的方法，该方法包括：终端设备在选择随机接入的载波之前，确定该随机接入的消息3的发送方式，该消息3的发送方式包括：该终端设备重复发送消息3，或终端设备不重复发送消息3；该终端设备根据该消息3的发送方式，在第一随机接入前导分组或第一随机接入机会分组确定随机接入前导，该第一随机接入前导分组或第一随机接入机会分组与该消息3的发送方式相关联，该同步信号块与该第一随机接入前导分组或者该第一随机接入机会分组相关联；该终端设备向网络设备发送该随机接入前导。
其中，该终端设备重复发送该消息3，包括以下一种或多种情况：该终端设备希望重复发送该消息3、该终端设备具备重复发送该消息3的能力、该终端设备需要重复发送该消息3、该终端设备希望被调度重复发送该消息3、该终端设备发送该消息3的次数大于 1次。
该终端设备不重复发送该消息3，包括以下一种或多种情况：该终端设备不具备重复发送该消息3的能力，该终端设备不需要重复发送该消息3、该终端设备不希望重复发送该消息3、该终端设备不希望被调度重复发送该消息3、该终端设备的发送该消息3的次数小于或等于1次。
结合第五方面，在第五方面的某些实现方式中，终端设备在选择随机接入的载波类型之前，确定消息3的发送方式，该消息3的发送方式用于指示是否重复发送该消息3；该消息3的发送方式与以下至少一种情况相关联：终端设备重复发送消息3、终端设备不重复发送消息3、终端设备发送消息3的次数、终端设备具备重复发送消息3的能力、终端设备不具备重复发送消息3的能力、终端设备需要重复发送该消息3、终端设备不需要重复发送该消息3、终端设备希望被调度重复发送该消息3、终端设备不希望被调度重复发送该消息3；该终端设备根据该消息3的发送方式，在第一随机接入前导分组或第一随机接入机会分组确定随机接入前导，该第一随机接入前导分组或第一随机接入机会分组与该消息3的发送方式相关联，该同步信号块与该第一随机接入前导分组或者该第一随机接入机会分组相关联。
在该实现方式中，终端设备在选择随机接入的载波类型之前，确定消息3的发送方式，然后选择与该消息3的发送方式相关联的随机接入前导分组或随机接入机会分组，这样，在后续的随机接入流程中，网络设备可以根据终端设备选择的随机接入前导分组或随机接入机会分组来确定消息3的发送方式，从而可以更有针对性的为终端设备调度资源，有利于资源的有效利用。
第六方面，提供了一种随机接入的装置，该装置包括：处理模块，用于在至少两个随机接入前导分组中确定第一随机接入前导分组，该至少两个随机接入前导分组与消息3的发送方式相关联，该消息3用于随机接入，该消息3的发送方式包括：该装置重复发送该消息3，或者该装置不重复发送该消息3，该至少两个随机接入前导分组中至少有一个随机接入前导分组与该终端设备重复发送该消息3相关联；该处理模块还用于：在该第一随机接入前导分组确定随机接入前导；收发模块，用于向网络设备发送该随机接入前导。
结合第六方面，在第六方面的某些实现方式中，该装置包括：处理模块，用于在至少两个随机接入前导分组中确定第一随机接入前导分组，该至少两个随机接入前导分组与随机接入过程的消息3的发送方式相关联，该消息3的发送方式用于指示是否重复发送该消息3，该消息3的发送方式与以下至少一种情况相关联：该装置重复发送该消息3、该装置不重复发送该消息3、该装置发送该消息3的次数、该装置具备重复发送该消息3的能力、该装置不具备重复发送该消息3的能力、该装置需要重复发送该消息3、该装置不需要重复发送该消息3、该装置希望被调度重复发送该消息3、该装置不希望被调度重复发送该消息3，该至少两个随机接入前导分组中至少有一个随机接入前导分组与该装置重复发送该消息3的发送方式相关联；该处理模块还用于在该第一随机接入前导分组确定随机接入前导。
结合第六方面，在第六方面的某些实现方式中，该装置还包括收发模块，该收发模块具体用于；接收来自网络设备的指示信息；该处理模块具体用于：根据该指示信息确定该第一随机接入前导分组与该装置重复发送该消息3的发送方式相关联；当该消息3的发送 方式为该装置重复发送该消息3，在至少两个随机接入前导分组中确定该第一随机接入前导分组。
结合第六方面，在第六方面的某些实现方式中，该处理模块具体用于：测量参考信号接收功率RSRP；当该RSRP小于第一门限值，在该至少两个随机接入前导分组中确定该第一随机接入前导分组，该第一随机接入前导分组与该装置重复发送该消息3相关联，该第一门限值由第二门限值和相对门限值确定，该第二门限值用于确定该随机接入的载波类型或该随机接入的随机接入类型或该同步信号块。
结合第六方面，在第六方面的某些实现方式中，该处理模块还用于：根据该消息3的最大重复发送次数确定该相对门限值，该消息3的最大重复发送次数与该相对门限值相关联；或者，根据该第一随机接入前导分组中的随机接入前导的数量确定该相对门限值，该第一随机接入前导分组中的随机接入前导的数量与该相对门限值相关联；或者，根据该第一随机接入机会分组中的随机接入前导的数量确定该相对门限值，该第一随机接入机会分组中的随机接入前导的数量与该相对门限值相关联；或者，根据该装置的最大发送功率能力或功率类型确定该相对门限值，该装置的最大发送功率能力或功率类型与该相对门限值相关联。
第七方面，提供了一种随机接入的装置，该装置包括：处理模块，用于在选择随机接入的同步信号块之后，确定该随机接入的消息3的发送方式，该消息3的发送方式包括：该装置重复发送消息3，或该装置不重复发送消息3；该处理模块还用于：根据该消息3的发送方式，在第一随机接入前导分组或第一随机接入机会分组确定随机接入前导，该第一随机接入前导分组或第一随机接入机会分组与该消息3的发送方式相关联，该同步信号块与该第一随机接入前导分组或者该第一随机接入机会分组相关联；收发模块，该收发模块用于向网络设备发送该随机接入前导。
结合第七方面，在第七方面的某些实现方式中，该装置包括：处理模块，用于在选择随机接入的同步信号块之后，确定该随机接入的消息3的发送方式，该消息3的发送方式用于指示是否重复发送该消息3，该消息3的发送方式与以下至少一种情况相关联：该装置重复发送该消息3、该装置不重复发送消息3、该装置发送该消息3的次数、该装置具备重复发送该消息3的能力、该装置不具备重复发送该消息3的能力、该装置需要重复发送该消息3、该装置不需要重复发送该消息3、该装置希望被调度重复发送该消息3、该装置不希望被调度重复发送该消息3；该处理模块还用于根据该消息3的发送方式，在第一随机接入前导分组或第一随机接入机会分组确定随机接入前导，该第一随机接入前导分组或第一随机接入机会分组与该消息3的发送方式相关联，该同步信号块与该第一随机接入前导分组或者该第一随机接入机会分组相关联。
结合第七方面，在第七方面的某些实现方式中，该处理模块具体用于：测量参考信号接收功率RSRP；当该RSRP小于第一门限值，确定重复发送该消息3，该第一门限值由第二门限值和相对门限值确定，该第二门限值用于确定该随机接入的载波类型或该随机接入的随机接入类型或该同步信号块。
结合第七方面，在第七方面的某些实现方式中，该处理模块还用于：根据该消息3的最大重复发送次数确定该相对门限值，该消息3的最大重复发送次数与该相对门限值相关联；或者，根据该第一随机接入前导分组中的随机接入前导的数量确定该相对门限值，该 第一随机接入前导分组中的随机接入前导的数量与该相对门限值相关联；或者，根据该第一随机接入机会分组中的随机接入前导的数量确定该相对门限值，该第一随机接入机会分组中的随机接入前导的数量与该相对门限值相关联；或者，根据该装置的最大发送功率能力或功率类型确定该相对门限值，该装置的最大发送功率能力或功率类型与该相对门限值相关联。
结合第七方面，在第七方面的某些实现方式中，该装置还包括收发模块，该收发模块具体用于接收来自网络设备的指示信息，该指示信息用于指示该网络设备是否支持重复传输该消息3；该处理模块具体用于：当该网络设备支持重复传输该消息3，且该装置需要且支持重复发送该消息3时，确定重复发送该消息3。
第八方面，提供了一种随机接入的装置，该装置包括：处理模块，用于在选择随机接入的接入类型之后，和/或选择该随机接入的同步信号块之前，确定该随机接入的消息3的发送方式，该消息3的发送方式包括：该装置重复发送消息3，或装置不重复发送消息3；该处理模块还用于根据该消息3的发送方式，在第一随机接入前导分组或第一随机接入机会分组确定随机接入前导，该第一随机接入前导分组或第一随机接入机会分组与该消息3的发送方式相关联，该同步信号块与该第一随机接入前导分组或者该第一随机接入机会分组相关联；收发模块，用于向网络设备发送该随机接入前导。
第九方面，提供了一种随机接入的装置，该装置包括：处理模块，用于在选择随机接入的载波之后，和/或选择该随机接入的接入类型之前，确定该随机接入的消息3的发送方式，该消息3的发送方式包括：该装置重复发送消息3，或装置不重复发送消息3；该处理模块还用于根据该消息3的发送方式，在第一随机接入前导分组或第一随机接入机会分组确定随机接入前导，该第一随机接入前导分组或第一随机接入机会分组与该消息3的发送方式相关联，该同步信号块与该第一随机接入前导分组或者该第一随机接入机会分组相关联；收发模块，用于向网络设备发送该随机接入前导。
第十方面，提供了一种随机接入的装置，该装置包括：处理模块，用于在选择随机接入的载波之前，确定该随机接入的消息3的发送方式，该消息3的发送方式包括：该装置重复发送消息3，或装置不重复发送消息3；该处理模块还用于根据该消息3的发送方式，在第一随机接入前导分组或第一随机接入机会分组确定随机接入前导，该第一随机接入前导分组或第一随机接入机会分组与该消息3的发送方式相关联，该同步信号块与该第一随机接入前导分组或者该第一随机接入机会分组相关联；收发模块，用于向网络设备发送该随机接入前导。
第十一方面，提供了一种通信装置，该装置包括：处理器，用于执行存储器中存储的计算机程序，以使得该通信装置执行第一方面或第五方面中的任一种可能的实现方式。
第十二方面，提供了一种计算机可读存储介质，该计算机可读存储介质上存储有计算机程序，当该计算机程序在计算机上运行时，使得该计算机执行第一方面至第五方面中的任一种可能的实现方式。
第十三方面，提供了一种计算机程序产品，该计算机程序产品包括计算机程序指令，该计算机程序指令在计算机上运行时，使得计算机执行如第一方面至第五方面中任一项该的方法。
第十四方面，提供了一种芯片系统，该芯片系统包括：处理器，用于从存储器中调用 并运行计算机程序，使得安装有该芯片系统地通信设备执行第一方面至第五方面中的任一种可能的实现方式。
附图说明
图1是本申请实施例应用的通信系统的示意图。
图2是本申请实施例应用的通信系统的另一种示意图。
图3是四步随机接入的示意性流程图。
图4是SSB与随机接入前导的一种关联关系示意图。
图5是SSB与随机接入前导的另一种关联关系示意图。
图6是两步随机接入的示意性流程图。
图7是基于非竞争的随机接入的示意性流程图。
图8是本申请实施例提供的一种随机接入的方法的示例性框图。
图9是本申请实施例提供的一种随机接入的方法的示例性流程图。
图10是本申请实施例提供的另一种随机接入的方法的示例性框图。
图11是本申请实施例提供的另一种确定随机接入的方法的示例性流程图。
图12是本申请实施例提供的SSB与随机接入前导的一种关联关系示意图。
图13是本申请实施例提供的SSB与随机接入前导的另一种关联关系示意图。
图14是本申请实施例提供的又一种随机接入的方法的示例性框图。
图15是本申请实施例提供的又一种随机接入的方法的示例性流程图。
图16是本申请实施例提供的又一种随机接入的方法的示例性框图。
图17是本申请实施例提供的又一种随机接入的方法的示例性流程图。
图18是本申请实施例提供的又一种随机接入的方法的示例性框图。
图19是本申请实施例提供的又一种随机接入的方法的示例性流程图。
图20是本申请的随机接入的装置的一例的示意性框图。
图21是本申请的随机接入的装置的另一例的示意性框图。
图22是本申请终端设备的一例示意性结构图。
具体实施方式
下面将结合附图，对本申请中的技术方案进行描述。
本申请实施例的技术方案可以适用于各种通信系统，例如：长期演进(long term evolution，LTE)系统、LTE频分双工(frequency division duplex，FDD)系统、LTE时分双工(time division duplex，TDD)系统、通用移动通信系统(universal mobile telecommunication system，UMTS)、全球互联微波接入(worldwide interoperability for microwave access，WiMAX)通信系统、5G系统或新无线(new radio，NR)、第六代(6th generation，6G)系统或未来的通信系统等。本申请中所述的5G移动通信系统包括非独立组网(non-standalone，NSA)的5G移动通信系统或独立组网(standalone，SA)的5G移动通信系统。通信系统还可以是陆地公用移动通信网(public land mobile network，PLMN)网络、设备到设备(device-to-device，D2D)通信系统、机器到机器(machine to machine，M2M)通信系统、物联网(internet of Things，IoT)通信系统或者其他通信系统。
图1示出了适用于本申请实施例的方法的通信系统的示意图。如图所示，该通信系统可以包括至少一个无线接入网设备，例如图1所示的无线接入网设备110；该通信系统还可以包括至少一个终端设备，例如图1所示的终端设备120。无线接入网设备110与终端设备120可通过无线链路通信。
各通信设备，如图1中的无线接入网设备110或终端设备120，可以配置多个天线。该多个天线可以包括至少一个用于发送信号的发射天线和至少一个用于接收信号的接收天线。另外，各通信设备还附加地包括发射机链和接收机链，本领域普通技术人员可以理解，它们均可包括与信号发送和接收相关的多个部件(例如处理器、调制器、复用器、解调器、解复用器或天线等)。因此，无线接入网设备与终端设备之间可通过多天线技术通信。
应理解，该无线通信系统中的无线接入网设备可以是任意一种具有无线收发功能的设备。该设备包括但不限于：演进型节点B(evolved Node B，eNB)、无线网络控制器(radio network controller，RNC)、节点B(Node B，NB)、基站控制器(base station controller，BSC)、基站收发台(Base Transceiver Station，BTS)、家庭基站(例如，Home evolved NodeB，或Home Node B，HNB)、基带单元(baseband unit，BBU)，无线保真(wireless fidelity，WIFI)系统中的接入点(Access Point，AP)、无线中继节点、无线回传节点、传输点(transmission point，TP)或者发送接收点(transmission and reception point，TRP)等，还可以为5G，如，NR，系统中的gNB，或，传输点(TRP或TP)，5G系统中的基站的一个或一组(包括多个天线面板)天线面板，或者，还可以为构成gNB或传输点的网络节点，如基带单元(BBU)，或，分布式单元(distributed unit，DU)等。
在一些部署中，gNB可以包括集中式单元(centralized unit，CU)和DU。gNB还可以包括射频单元(radio unit，RU)。CU实现gNB的部分功能，DU实现gNB的部分功能，比如，CU实现无线资源控制(radio resource control，RRC)，分组数据汇聚层协议(packet data convergence protocol，PDCP)层的功能，DU实现无线链路控制(radio link control，RLC)层、媒体接入控制(media access control，MAC)层和物理(physical，PHY)层的功能。由于RRC层的信息最终会变成PHY层的信息，或者，由PHY层的信息转变而来，因而，在这种架构下，高层信令，如RRC层信令，也可以认为是由DU发送的，或者，由DU+CU发送的。可以理解的是，无线接入网设备可以为CU节点、或DU节点、或包括CU节点和DU节点的设备。此外，CU可以划分为接入网(radio access network，RAN)中的无线接入网设备，也可以将CU划分为核心网(core network，CN)中的无线接入网设备，本申请对此不做限定。
还应理解，该无线通信系统中的终端设备也可以称为用户设备(user equipment，UE)、接入终端、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、用户终端、终端、无线通信设备、用户代理或用户装置。本申请的实施例中的终端设备可以是手机(mobile phone)、平板电脑(pad)、带无线收发功能的电脑、虚拟现实(virtual reality，VR)终端设备、增强现实(augmented reality，AR)终端设备、工业控制(industrial control)中的无线终端、无人驾驶(self driving)中的无线终端、远程医疗(remote medical)中的无线终端、智能电网(smart grid)中的无线终端、运输安全(transportation safety)中的无线终端、智慧城市(smart city)中的无线终端、智慧家庭(smart home)中的无线终端 等等。本申请的实施例对应用场景不做限定。
另外，本申请的各个方面或特征可以实现成方法、装置或使用标准编程和/或工程技术的制品。本申请中使用的术语“制品”涵盖可从任何计算机可读器件、载体或介质访问的计算机程序。例如，计算机可读介质可以包括，但不限于:磁存储器件(例如，硬盘、软盘或磁带等)，光盘(例如，压缩盘(compact disc，CD)、数字通用盘(digital versatile disc，DVD)等)，智能卡和闪存器件(例如，可擦写可编程只读存储器(erasable programmable read-only memory，EPROM)、卡、棒或钥匙驱动器等)。另外，本文描述的各种存储介质可代表用于存储信息的一个或多个设备和/或其它机器可读介质。术语“机器可读介质”可包括但不限于，无线信道和能够存储、包含和/或承载指令和/或数据的各种其它介质。
图1所示的通信系统中无线接入网设备110和终端设备120之间的通信还可以用另一种形式来表示，如图2所示，终端设备120包括处理器121、存储器122和收发器123，收发器123包括发射机1231、接收机1232和天线1233。无线接入网设备110包括处理器111、存储器112和收发器113，收发器113包括发射机1131、接收机1132和天线1133。接收机1132可以用于通过天线1133接收传输控制信息，发射机1131可以用于通过天线1133向无线接入网设备110发送传输反馈信息。发射机1131可以用于通过天线1133向终端设备120发送传输控制信息，接收机1132可以用于通过天线1133接收终端设备120发送的传输反馈信息。
需要说明的是，本申请实施例可以应用于包括一个或多个网络设备的通信系统中，也可以应用于包括一个或多个终端的通信系统中，本申请对此不进行限定。
应理解，该通信系统中包括的网络设备可以是一个或多个。一个网络设备可以向一个或多个终端发送数据或控制信令。多个网络设备也可以同时向一个或多个终端发送数据或控制信令。
为便于理解本申请实施例，首先对本申请中涉及到的相关技术内容作简单说明。
1、随机接入(random access,RA)：
在LTE或5G有接入控制的通信系统中，用于未接入网络的设备与网络建立连接的信息交互机制(或者过程)。由于随机接入过程由随机接入信道(random access channel，RACH)承载，协议和口语中也常将RA和RACH混用。分为基于竞争的随机接入和非竞争的随机接入。基于竞争的随机接入通常分为4步，每一步对应一个消息：包括消息1、消息2、消息3、消息4，分别承载不同的信令或者信息。基于非竞争的随机接入只有前2步。另外，为了降低4步基于竞争的随机接入的接入时间，进一步有2步随机接入。在2步随机接入中，由消息A和消息B两个组成，其中消息A中包括前导和第一个数据信息(例如类似4步随机接入中的消息1和消息3)，消息B中包括竞争解决以及上行调度(例如类似4步随机接入中的消息2和消息4)。
2、随机接入机会：
随机接入机会又称为随机接入资源(RACH resource)、随机接入时机(RACH occasion/RACH transmission occasion/RACH opportunity/RACH chance，RO)，是指用于承载一个或者多个随机接入前导的时间、频率资源。逻辑上，一个随机接入机会用于承载物理随机接入信道(physical random access channel，PRACH)的信息/信号。有时也等效被称为物理随机接入机会、物理随机接入资源(PRACH resource)。
3、参考信号(reference signal,RS)：
根据功能，又称为解调参考信号(demodulation reference signal,DMRS)、信道状态信息参考信号(channel state information reference signal,CSI-RS)、相位跟踪参考信号(phase tracking reference signal,PTRS)、信道探测参考信号(sounding reference signal,SRS)等。是指发送端或者接收端已知或按照预定的规则可以推断：信号所在的时间和频率位置，以及时间和频率上承载的信号/符号。参考信号用于获取信号在传输中所受外界(例如，空间信道、发送或接收端器件非理想性)影响的已知信号，一般用于进行信道估计、辅助信号解调、检测。例如DMRS和CSI-RS用于获取信道信息，PTRS用于获取相位变化信息。
4、参考信号质量：
用于衡量接收信号的强度等，例如，参考信号接收功率(reference signal receiving power，RSRP)，是在某个符号内承载参考信号的所有资源元素上接收到的信号功率的平均值；接收信号强度指示(received signal strength indicator，RSSI)，是在某个符号内接收到的所有信号功率在资源块维度上的平均值(包括参考信号和数据信号、干扰、噪声等)；参考信号接收质量(reference signal receiving quality，RSRQ)可以根据RSSI和RSRQ得到，例如RSRQ＝NRB*RSRP/RSSI，资源块数量(number of resource block，NRB)为RSSI对应的目标信号的带宽。
5、资源块(resource block，RB)：
也称为物理资源块(physical resource block)，是基于OFDM的通信系统中频率资源的基本单位。一个资源块一般由N个资源元素(resource element，RE)组成，一个资源元素也称为一个子载波。其中N一般为12。若干个资源块组成一个资源块组(resource block group，RBG)，或者也称为物理资源块组。一般情况下，以资源块或者资源块组为单位进行预编码，进行预编码发送的基本单位也被称为预编码资源块组(precoding resource block group，PRG))。一个预编码资源组可以不小于一个资源块组。
6、下行控制信息(downlink control information，DCI)：
物理下行控制信道(physical downlink control channel，PDCCH)携带的信息称为下行控制信息DCI。DCI可以用于发送下行或上行调度、资源分配、功率控制、重传指示等信息。DCI可能指示终端设备级的信息，可以使用小区无线网络临时标识符(cell radio network temporary identifier，C-RNTI)加扰。或者，DCI也可能指示小区级的信息，可以使用系统信息无线网络临时标识符(system information radio network temporary identifier，SI-RNTI)、寻呼无线网络临时标识符(paging radio network temporary identifier，P-RNTI)、随机接入无线网络临时标识符(random access radio network temporary identifier，RA-RNTI)等加扰。
7、时频资源：
在本申请实施例中，数据或信息可以通过时频资源来承载，其中，该时频资源可以包括时域上的资源和频域上的资源。其中，在时域上，时频资源可以包括一个或多个时域单位(或者，也可以称为时间单位)，在频域上，时频资源可以包括频域单位。
其中，一个时域单位(也可称为时间单元)可以是一个符号，或者一个迷你时隙(Mini-slot)，或者一个时隙(slot)，或者一个子帧(subframe)，其中，一个子帧在时域上的持续时间可以是1毫秒(ms)，一个时隙由7个或者14个符号组成，一个迷你时 隙可以包括至少一个符号(例如，2个符号或7个符号或者14个符号，或者小于等于14个符号的任意数目符号)。列举的上述时域单位大小仅仅是为了方便理解本申请的方案，不应理解对本申请的限定，可以理解的是，上述时域单位大小可以为其它值，本申请不做限定。
一个频域单位可以是一个资源块，或者一个资源块组，或者一个预定义的子带(subband)。
8、四步随机接入(4-step RA)：
一种随机接入方式为四步随机接入。四步随机接入仅是用来表示一种随机接入方式的名称，其具体名称并不对本申请实施例的范围造成限定。终端设备和网络设备之间需要进行四步信息交互(Msg1,Msg2,Msg3,Msg4)。四步随机接入过程的基本流程100如图3所示。下面对流程100做示例性说明：
S101，网络设备向终端设备发送同步信号、系统信息和/或随机接入配置信息。
四步随机接入过程之前，网络设备在特定的位置，通过广播方式发送同步信号和系统信息。在NR中，基站发送的同步信号称为同步/广播信号块(synchronization signal/physical broadcast channel block，SSB)(或者表示为SS/PBCH block)，SSB和系统信息由网络设备根据配置周期性发送。
可选地，网络设备还可以向终端设备发送随机接入配置信息，以方便终端设备确定随机接入前导(random access preamble)的索引、时频资源、功率配置等信息。
S102，终端设备向网络设备发送Msg1。
终端设备开机之后或者需要重新接入网络时，扫描网络设备的同步信号，进行下行时间和频率同步，同时接收系统信息中有关随机接入资源的配置信息(随机接入配置信息)。
终端设备根据该随机接入配置信息以及同步到的SSB，选择该SSB关联的随机接入资源，该资源包括时间、频率资源，码域资源(随机接入前导码preamble)，并使用该随机接入资源发送随机接入信号，又称为消息1(Msg1)。该Msg1，即随机接入前导(preamble或者sequence)，通过PRACH承载。通常用于设备与网络之间发起连接请求、切换请求、同步请求、调度请求。
图4和图5为两种SSB与随机接入前导的关联关系示意图。其中，在图4所示的关联关系中，多个SSB关联到同一个随机接入机会中的不同随机接入前导序列，可以通过前导序列索引区分不同的SSB。在图5所示的关联关系中，一个SSB关联到多个随机接入机会。
在一种实现方式中，与K个(K≥1)SSB关联的随机接入机会中的前导，仅用于4-step RA。其中A×K个随机接入前导用于不重复发送消息3，B×K个随机接入前导用于重复发送消息3，A和B为整数。例如，可以是前导索引为0～A×K-1用于不重复发送消息3，前导索引A×K～A×K+B×K-1用于重复发送消息3，其中前导索引A×k～A×(k+1)-1和A×K+B×k～A×K+B×(k+1)-1关联到第k个SSB，k＝0～K-1为关联到该随机接入机会的K个SSB的索引。再例如，还可以是前导索引为0～(A+B)×K-1用于关联到K个SSB，每个SSB关联(A+B)个随机接入前导，其中A个随机接入前导用于不重复发送消息3，B个随机接入前导不重复发送消息3。具体地，其中前导索引(A+B)×k～(A+B)×(k+1)-1关联到第k个SSB，且前导索引为(A+B)×k～(A+B)×k+A-1用于不重复发送消息3，前导索引 (A+B)×k+A～(A+B)×(k+1)-1用于重复发送消息3，k＝0～K-1为关联到该随机接入机会的K个SSB的索引。
在一种实现方式中，与K个(K≥1)SSB关联的随机接入机会中的前导，仅用于2-step RA。其中A×K个随机接入前导用于不重复发送消息A，B×K个随机接入前导用于重复发送消息A，A和B为整数。例如，可以是前导索引为0～A×K-1用于不重复发送消息A，前导索引A×K～A×K+B×K-1用于重复发送消息A，其中前导索引A×k～A×(k+1)-1和A×K+B×k～A×K+B×(k+1)-1关联到第k个SSB，k＝0～K-1为关联到该随机接入机会的K个SSB的索引。再例如，还可以是前导索引为0～(A+B)×K-1用于关联到K个SSB，每个SSB关联(A+B)个随机接入前导，其中A个随机接入前导用于不重复发送消息A，B个随机接入前导不重复发送消息A。具体地，其中前导索引(A+B)×k～(A+B)×(k+1)-1关联到第k个SSB，且前导索引为(A+B)×k～(A+B)×k+A-1用于不重复发送消息A，前导索引(A+B)×k+A～(A+B)×(k+1)-1用于重复发送消息A，k＝0～K-1为关联到该随机接入机会的K个SSB的索引。
在一种实现方式中，与K个(K≥1)SSB关联的随机接入机会中的前导，其中MK个随机接入前导用于4-step RA，NK个随机接入前导用于2-step RA。所有随机接入前导用于消息3或消息A的不重复发送。
在一种实现方式中，与K个(K≥1)SSB关联的随机接入机会中的前导，其中MK个随机接入前导用于4-step RA，NK个随机接入前导用于2-step RA。其中用于4-step RA的MK个随机接入前导中，有AK个随机接入前导用于消息3的不重复发送，BK个随机接入前导用于消息3的重复发送，A+B≤M(细节与上述实施例相同)。而且，所有NK个用于2-step RA的前导对应消息A不重复发送。
在一种实现方式中，与K个(K≥1)SSB关联的随机接入机会中的前导，其中MK个随机接入前导用于4-step RA，NK个随机接入前导用于2-step RA。其中用于2-step RA的NK个随机接入前导中，有AK个随机接入前导用于消息A的不重复发送，BK个随机接入前导用于消息A的重复发送，A+B≤N(细节与上述实施例相同)。而且，所有MK个用于4-step RA的前导对应消息3不重复发送。
在NR中，通过SSB于随机接入资源之间的关联，使得网络设备检测到随机接入前导后，就可以获取发送消息2(Msg2)和/或的下行波束。
S103，网络设备向终端设备发送Msg2。
网络设备接收到终端设备发送的Msg1之后，根据终端设备发送的preamble，估计终端设备的定时提前量，并向终端设备回复消息2(Msg2)，Msg2中包括了终端设备用于发送消息3(Msg3)进行冲突解决的时频资源位置，调制编码方式等配置信息。
其中，Msg2也称为随机接入响应(random access response,RAR)消息，是网络设备对接收到的Msg1的回应，一个Msg2里面可以回应多个Msg1。对于单个随机接入前导来说，在媒介接入层MAC具有特定的随机接入响应消息。而网络设备往往将一个随机接入机会上检测到的所有随机接入前导的响应，封装到一起，组成一个Msg2，即网络设备可以在同一个Msg2里面，同时针对多个Msg1进行响应，即包含多个RAR。也就是说，RAR在物理层和MAC层都可以称为消息2，但是在物理层一般也被称为与具体某个(例如，终端发送的)随机接入前导相对应的响应消息；而在MAC层则是针对某个随机接入机会或 者多个随机接入机会中，基站检测到的所有随机接入前导响应消息的组合，以MAC数据单元形式组包。
RAR中包括以下信息中的至少一项：Msg1的索引(random access preamble identity，RAPID)、上行调度授权(uplink grant)、时间提前(timing advance)、临时小区-无线网络临时标识(temporary cell radio network temporary identity,TC-RNTI)等。
终端设备发送随机接入前导后，在对应的Msg2中搜寻自己发送的随机接入前导对应的随机接入响应消息，且忽略针对其他随机接入前导的响应消息。
S104，终端设备向网络设备发送Msg3。
终端设备收到Msg2之后，根据Msg2中配置，在对应时频资源发送消息3；Msg3的传输也称为第一次上行调度传输，是由消息2中的UL grant调度传输，或者TC-RNTI加扰的DCI调度的重传。Msg3传输内容为高层消息，例如连接建立请求消息(具体可能是发起连接请求用户的标识信息)。该消息的作用是用于竞争解决，如果多个不同设备使用相同Msg1进行随机接入，通过Msg3和Msg4可以共同确定是否有冲突。消息3的传输有重传和功率控制(即调度初传或者重传的UL grant中，有功率控制信息)。
S105，网络设备向终端设备发送Msg4。
基站接收到消息3之后，向用户回复消息4(Msg4)，指示终端用户成功接入。
Msg4用于竞争解决。通常包括消息3中携带的CCCH SDU。如果终端设备在消息4中检测到自己发送的CCCH SDU，则认为竞争随机接入成功，继续进行接下来的通信过程。消息4有重传，即有相应的物理上行控制信道(physical uplink control channel，PUCCH)传输反馈信息(是否成功检测到消息4)，终端设备在PUCCH发送反馈信息有功率控制。
其中，Msg1、Msg3、Msg4可以有重新传输(例如传输失败后进行重新传输)。
9、两步随机接入(2-step RA)：
一种随机接入方式为两步随机接入。终端设备和网络设备之间需要进行两步信息交互(MsgA,Msg B)。两步随机接入过程的基本流程200如图6所示。下面对流程200做示例性说明：
S201，终端设备向网络设备发送消息A(Msg A)。
该Msg A包括随机接入前导码和第一个数据信息。
S202，网络设备向终端设备发送Msg B。
网络设备向终端设备发送随机接入响应Msg B，该Msg B中包括竞争解决和上行调度。
10、竞争和非竞争随机接入：
根据随机接入过程中，不同终端设备是否可能发生碰撞分为两种不同的随机接入过程：基于竞争的(contention-based)随机接入过程和基于非竞争的(contention-free,non-contention)随机接入过程。基于非竞争的随机接入过程主要包括两个步骤。一种基于非竞争的随机接入流程300如图7所示。下面对流程300做示例性说明：
S301，网络设备向终端设备发送同步信号、系统信息和/或随机接入配置信息。
S301与流程100中的S101类似，不再重复说明。
S302，终端设备向网络设备发送Msg1。
终端设备向网络设备发送随机接入前导，也称为Msg1。对于基于非竞争的随机接入，随机接入前导是终端设备专用的，所以不存在冲突。
S303，网络设备向终端设备发送Msg2。
网络设备向终端设备发送随机接入响应，也称为Msg2。
需要说明，图6所示的两步随机接入过程和图7所示的基于非竞争的随机接入过程虽然都包括两个步骤，但具体的传输方式和消息内容并不相同。
在4步随机接入流程中，有些终端设备需要对Msg3进行重复传输以进行覆盖增强。在这种情况下，如何让网络设备可以针对不同Msg3的传输方式合理调度资源，是我们需要考虑的问题。
一种实现方式中，终端设备在至少另个随机接入前导分组中确定第一随机接入前导分组，该至少两个随机接入前导分组与随机接入过程的消息3的发送方式相关联，该消息3的发送方式包括：该终端设备重复发送该消息3，或者该终端设备不重复发送该消息3，该至少两个随机接入前导分组中至少有一个随机接入前导分组与该终端设备重复发送该消息3的发送方式相关联；该终端设备在该第一随机接入前导分组确定随机接入前导；该终端设备向网络设备发送该随机接入前导。
其中，该终端设备重复发送该消息3，包括以下一种或多种情况：该终端设备具备重复发送该消息3的能力，该终端设备需要重复发送该消息3、该终端设备希望重复发送该消息3、该终端设备希望被调度重复发送该消息3、该终端设备的发送该消息3的次数大于1次；
该终端设备不重复发送该消息3，包括以下一种或多种情况：该终端设备不具备重复发送该消息3的能力，该终端设备不需要重复发送该消息3、该终端设备不希望重复发送该消息3、该终端设备不希望被调度重复发送该消息3、该终端设备的发送该消息3的次数小于或等于1次。
或者，在一种实现方式中，终端设备在至少两个随机接入前导分组中确定第一随机接入前导分组，该至少两个随机接入前导分组与随机接入过程的消息3(Msg3)的发送方式相关联，该Msg3的发送方式用于指示是否重复发送该Msg3，该Msg3的发送方式与以下至少一种情况相关联：终端设备重复发送Msg3、终端设备不重复发送Msg3、终端设备发送Msg3的次数、终端设备具备重复发送Msg3的能力、终端设备不具备重复发送Msg3的能力、终端设备需要重复发送Msg3、终端设备不需要重复发送Msg3、终端设备希望被调度重复发送Msg3、终端设备不希望被调度重复发送Msg3(如果没有特殊说明，本申请中将Msg3的发送方式中的终端设备重复发送Msg3、终端设备具备重复发送Msg3的能力、终端设备需要重复发送Msg3、终端设备希望被调度重复发送Msg3、终端设备发送Msg3的次数大于1，采用“重复发送Msg3”为例进行描述；本申请中将Msg3的发送方式中的终端设备不重复发送Msg3、终端设备不具备重复发送Msg3的能力、终端设备不需要重复发送Msg3、终端设备不希望被调度重复发送Msg3、终端设备发送Msg3的次数为1，采用“不重复发送Msg3”的描述)；该至少两个随机接入前导分组中至少有一个随机接入前导分组与重复发送Msg3的发送方式相关联，或者说，该至少两个随机接入前导分组中至少有一个随机接入前导分组用于指示重复发送Msg3；该终端设备在该第一随机接入前导分组确定随机接入前导。
在上述方案中，终端设备可以在选择随机接入的同步信号块之后，便选择随机接入前导分组，其中，终端设备在至少两个随机接入前导分组中确定第一随机接入前导分组的具 体方式可以包括：一示例，终端设备接收来自网络设备的指示信息；该终端设备根据该指示信息确定该第一随机接入前导分组与终端设备重复发送Msg3的发送方式相关联；当该Msg3的发送方式为终端设备重复发送该MSg3，该终端设备在至少两个随机接入前导分组中确定该第一随机接入前导分组，或者说，该终端设备选择该第一随机接入前导分组。另一示例，终端设备测量参考信号接收功率RSRP(例如，同步信号块的RSRP)，当该RSRP小于第一门限值，该终端设备在该至少两个随机接入前导分组中确定第一随机接入前导分组，其中，该第一随机接入前导分组与终端设备重复发送Msg3的发送方式相关联。即当RSRP满足一定的门限值要求，终端设备可以选择第一随机接入前导分组来指示Msg3的重复发送。在一种可能的实现方式中，该第一门限值由第二门限值和相对门限值确定，该第二门限值用于确定随机接入的载波类型或随机接入的随机接入类型或随机接入的同步信号块。又一示例，终端设备接收来自网络设备的指示信息；该终端设备根据该指示信息确定该第一随机接入前导分组与该终端设备重复发送Msg3的发送方式相关联；终端设备测量参考信号接收功率RSRP，当该RSRP小于第一门限值，该终端设备在该至少两个随机接入前导分组中确定(或者说选择)第一随机接入前导。
或者，终端设备在至少两个随机接入机会分组中确定第一随机接入机会分组，该至少两个随机接入机会分组与随机接入过程的Msg3的发送方式相关联，Msg3的发送方式用于指示是否重复发送该Msg3，该Msg3的发送方式包括与以下至少一种情况相关联：终端设备重复发送Msg3，或者终端设备不重复发送Msg3，该至少两个随机接入机会分组中至少有一个随机接入机会分组与终端设备重复发送Msg3的发送方式相关联，或者说，该至少两个随机接入机会分组中至少有一个随机接入机会分组用于指示(或对应)重复发送Msg3；该终端设备在该第一随机接入前导分组确定随机接入前导。应理解，这里的随机接入机会分组既可以包含多个随机接入机会，也可以仅包含一个随机接入机会，即一个随机接入机会可以单独组成一个分组。
下面结合图8和图9介绍一种随机接入前导的，其中，图9是图8中的方法400所对应的流程图。方法400包括：
S401，终端设备选择载波类型。
示例性地，当终端设备需要与网络设备(如基站)建立连接时，终端设备测量下行参考信号接收功率RSRP，其中，这里的下行参考信号可以是同步广播信号块SSB，也可以是信道状态信息参考信号(channel state information reference signal，CSI-RS)，该参考信号也可以称为下行路损参考(downlink pathloss reference)信号。
根据图9中的方法流程图，当终端设备被配置了SUL资源，且RSRP<SUL门限值时，终端设备选择SUL作为本次随机接入所使用的载波。否则，终端设备选择NUL作为本次随机接入所使用的载波。应理解，该SUL门限值可以是网络设备提前配置给该终端设备的，该SUL门限值可以记作rsrp-ThresholdSSB-SUL。
需要说明的是，在另一种情况下，在S401之前，终端设备还可以根据网络设备的指示确定本次随机接入所使用的载波的类型，或者终端设备自己确定本次随机接入所使用的载波的类型，本申请不做限定。
S402，该终端设备选择随机接入类型。
示例性地，终端设备在选择了载波之后，进一步选择本次随机接入的随机接入类型。
根据图9中的方法流程图，当终端设备配置了2步资源(用于2步随机接入的资源)，且RSRP>Msg A门限值时，则终端设备选择进行2步随机接入，否则终端设备选择进行4步随机接入。应理解，该Msg A门限值可以是网络设备提前配置给该终端设备的，该Msg A门限值可以记作msgA-RSRP-Threshold。
S403，该终端设备选择SSB。
示例性地，根据图9中的方法流程图，如果在S402，终端设备选择进行2步随机接入，此时若RSRP>SSB门限值，则终端设备在候选SSB中选择其中一个SSB，否则终端设备选择任意一个SSB；如果在S402，终端设备选择进行4步随机接入，且终端设备测量的RSRP对应于SSB(也就是该RSRP是对SSB进行测量得到的)，此时若RSRP>SSB门限值，则终端设备在候选SSB中选择一个SSB，否则终端设备选择任意SSB；如果在S402，终端设备选择进行4步随机接入，且终端设备测量的RSRP对应于CSI-RS(也就是RSRP是对CSI-RS进行测量得到的)，此时若RSRP>CSI-RS门限值，则终端设备在候选SSB中选择一个SSB，否则终端设备选择任意SSB。
应理解，该SSB门限值和CSI-RS门限值可以是网络设备提前配置给终端设备的，该SSB门限值可以记作rsrp-ThresholdSSB，该CSI-RS门限值可以记作rsrp-ThresholdCSI-RS。
应理解，上述门限值可以由网络设备通过高层信令进行配置，即这些门限值可以承载于高层信令中发送给终端设备，这里的高层信令例如可以是物理广播信道(physical broadcast channel，PBCH)、剩余最小系统信息(remaining minimum system information，RMSI)、系统信息块(system information block，SIB)1、SIB2、SIB3、媒体接入控制-控制元素(media access control-control element，MAC-CE)、下行控制信息DCI、无线资源控制RRC、系统信息等。
下面给出一种门限值的配置方式的示例：
rsrp-ThresholdSSB RSRP-Range
rsrp-ThresholdSSB-SUL RSRP-Range
msgA-RSRP-Threshold-r16RSRP-Range
msgA-RSRP-ThresholdSSB-r16 RSRP-Range
rsrp-ThresholdCSI-RS RSRP-Range
S404，该终端设备选择随机接入前导分组/随机接入机会分组。
示例性地，该终端设备在至少两个随机接入前导分组中选择第一随机接入前导分组，该至少两个随机接入前导分组中至少有一个随机接入前导分组与终端设备重复发送Msg3的发送方式相关联，或者说，该至少两个随机接入前导分组中至少有一个随机接入前导分组用于指示重复发送Msg3。
该Msg3的发送方式包括：终端设备重复发送该Msg3，或者，终端设备不重复发送该Msg3。其中，该终端设备重复发送该Msg3，包括以下一种或多种情况：该终端设备具备重复发送该消息3的能力，该终端设备需要重复发送该消息3、该终端设备希望重复发送该消息3、该终端设备希望被调度重复发送该消息3、该终端设备的发送该消息3的次数大于1次；该终端设备不重复发送该消息3，包括以下一种或多种情况：该终端设备不具备重复发送该消息3的能力，该终端设备不需要重复发送该消息3、该终端设备不希望重复发送该消息3、该终端设备不希望被调度重复发送该消息3、该终端设备的发送该消 息3的次数小于或等于1次。
这里的Msg3的发送方式指的是在调度Msg3初始传输或者被调度重新传输时，Msg3重复发送或者Msg3不重复发送(即本次调度，Msg3只发送一次，或者Msg3发送多次)。在另外的实现方式中，还可以是Msg3初传时不重复发送，被调度重传时可以重复发送。
其中，重复发送Msg3，指相同的Msg3的内容(也称为负载payload)经过编码、调制等物理层处理过程后，被映射到多个不同时间(例如，分布在一个或多个时隙上的OFDM符号，或者一个或多个发送机会)和/或者频域资源区域进行发送。在这个过程中，可以发送同一个Msg3的不同(编码)冗余版本，或者相同的冗余版本，或者部分重复发送采取相同的冗余版本、部分重复发送采取不同的冗余版本。其中，用于发送消息3的资源由网络设备在Msg2随机接入响应中调度，或者通过下行控制信息DCI指示。该资源可以是单份，用于Msg3的重复发送或者不重复发送。该资源还可以是多份，终端设备可以从中选择一份或者多份，每一份用于Msg3的重复发送或者不重复发送。
其中，不重复发送Msg3，指Msg3的内容(也称为负载payload)经过编码、调制等物理层处理过程后，被映射到单份时间(可以是指一个时隙，或多个OFDM符号，或者在多个时隙上的多个OFDM符号)和/或者频域资源区域进行发送。在这过程中，仅发送同一个Msg3的单个(编码)冗余版本。终端设备可以是在确定随机接入前导(或者是确定随机接入前导所在的随机接入前导分组，或者是确定随机接入前导所在的随机接入机会分组)之前，确定Msg3的发送方式。例如，终端设备可以在选择随机接入的同步信号块SSB之前或者之后，确定随机接入过程的Msg3的发送方式。
在一种可能的实现方式中，当终端设备根据来自网络设备的指示确定网络设备支持在第二随机接入前导分组/第二随机接入机会分组中重复发送Msg3，并且该Msg3的发送方式为终端设备重复发送该Msg3时，终端设备在第二随机接入前导分组/第二随机接入机会分组选择随机接入前导，并且重复发送Msg3；当终端设备根据来自网络设备的指示信息确定网络设备不支持在第三随机接入前导分组/第三随机接入机会中重复发送Msg2，或者该Msg3的发送方式为终端设备不重复发送该Msg3时，则终端设备不重复发送Msg3，其中，该第二随机接入前导分组/第二随机接入机会分组与终端设备重复发送Msg3的发送方式相关联。
其中，终端设备重复发送Msg3，表示以下中的任意一项：终端设备需要重复发送Msg3；终端设备具备重复发送Msg3的能力；终端设备具备重复发送Msg3的能力，且希望/需要重复发送Msg3；终端具备重复发送Msg3的能力，且希望/需要网络设备调度Msg3重复发送(的资源)；终端具备重复发送Msg3的能力，且不希望被Msg2调度Msg3重复发送，但是在Msg3重传时可以重复发送Msg3；Msg3的负载满足一定约束条件，且希望/需要基站调度Msg3重复发送(的资源)；终端设备所选择的下行信号满足一定约束条件，且希望/需要基站调度Msg3重复发送(的资源)。
其中，终端设备不重复发送Msg3，表示以下中的任意一项：终端设备不需要重复发送Msg3；终端设备不具备重复发送Msg3的能力；终端设备具备重复发送Msg3的能力，但是不希望被Msg2调度Msg3重复发送；终端设备具备重复发送Msg3的能力，但是不希望/不需要Msg3重复发送。
下面以分组A(Group A)和分组B(GroupB)作为一种示例进行详细说明，其中Group  A和Group B为两个不同的随机接入前导分组，网络设备可以通过对Group B(也可能是Group A)配置预留值来指示网络设备支持在Group B中重复传输Msg3。
下面首先对一种可能的Group A和Group B作示例性说明，在该示例中，Group A和Group B是用于区分Msg3负载大小的不同分组。例如：
对于4步随机接入：如果配置了随机接入前导分组B，且潜在的Msg3大小大于ra-Msg3SizeGroupA，路损值小于PCMAX–preambleReceivedTargetPower–msg3-DeltaPreamble–messagePowerOffsetGroupB，则选择随机接入前导分组B，其中，PCMAX表示最大允许输出功率，preambleReceivedTargetPower表示前导目标接收功率，msg3-DeltaPreamble对应消息3和前导功率偏移值，messagePowerOffsetGroupB对应分组B消息功率偏移值；或者，如果配置了随机接入前导分组B，且随机接入过程由CCCH逻辑信道发起，公共控制信道(common control channel，CCCH)服务数据单元(service data unit，SDU)的大小加上MAC子头大于ra-Msg3SizeGroupA，则选择随机接入前导分组B，否则选择随机接入前导分组A，其中该ra-Msg3SizeGroupA为设定的门限值。
具体的配置信令示例如下：
if Random Access Preambles group B is configured:
if the potential Msg3size(UL data available for transmission plus MAC subheader(s)and,where required,MAC CEs)is greater than ra-Msg3SizeGroupA and the pathloss is less than PCMAX(of the Serving Cell:
performing the Random Access Procedure)–preambleReceivedTargetPower–msg3-DeltaPreamble–messagePowerOffsetGroupB；or
if the Random Access procedure was initiated for the CCCH logical channel and the CCCH SDUsize plus MACsubheader is greater than ra-Msg3SizeGroupA:
select the Random Access Preambles group B.
else:select the Random Access Preambles group A.
else:select the Random Access Preambles group A.
其中ra-Msg3SizeGroupA可以配置如下：
Figure PCTCN2022113069-appb-000001
上述示例中的b表示比特，后面的数字表示比特数量。即b56表示56个比特。
对于两步随机接入：如果配置了2步随机接入的随机接入前导分组B，且潜在的消息A负载大小大于ra-Msg3SizeGroupA，路损值小于PCMAX–msgA-PreambleReceivedTargetPower–msgA-DeltaPreamble–messagePowerOffsetGroupB，则选择随机接入前导分组B；或者，如果配置了随机接入前导分组B，且随机接入过程由 CCCH逻辑信道发起，CCCH SDU的大小加上MAC子头大于ra-MsgA-SizeGroupA，则选择随机接入前导分组B。否则选择随机接入前导分组A。
具体的配置信令示例如下：
if Random Access Preambles group B for 2-step RA type is configured:
if the potential MSGA payload size(UL data available for transmission plus MAC subheader and,where required,MAC CEs)is greater than the ra-MsgA-SizeGroupA and the pathloss is less than PCMAX(of the Serving Cell performing the Random Access Procedure)–msgA-PreambleReceivedTargetPower–msgA-DeltaPreamble–messagePowerOffsetGroupB；or
if the Random Access procedure was initiated for the CCCH logical channel and the CCCH SDU size plus MAC subheader is greater than ra-MsgA-SizeGroupA:
select the Random Access Preambles group B.
else:select the Random Access Preambles group A.
else:select the Random Access Preambles group A.
其中ra-MsgA-SizeGroupA可以配置如下：
Figure PCTCN2022113069-appb-000002
上述Group A和Group B的配置仅仅是一种示例，实际应用中可以有多种分组方式，本申请不作限定。一种具体的示例：网络设备可以通过对Group B配置预留值来指示网络设备支持在Group B中重复传输Msg3，这里的预留值可以是value-a,value-b,value-c,value-d中的一个或多个。具体例如：
当Group B的配置值为b56,b144,b208,b256,b282,b480,b640,b800,b1000,b72中的任意一个时，表示Group B(的前导)对应于Msg3的大小和/或路损，或者说Group B是与Msg3的大小和/或路损相关联的随机接入前导分组，此时Msg3不重复发送，或者说终端设备根据Group B的配置值，确定不重复发送Msg3。其中，这里的配置值可以是上述示例中的ra-Msg3SizeGroupA；
当Group B的配置值为value-a,value-b,value-c,value-d中的一个或多个时，表示Group B的(的前导)可以用于指示Msg3重复发送，或者说Group B(的前导)可以用于指示网络设备支持Msg3重复发送，或者说Group B是与Msg3的重复发送的发送方式相关联的随机接入前导。示例性地，当网络设备配置ra-Msg3SizeGroupA值为value-a,value-b,value-c,value-d中的一个、且终端设备支持且希望Msg3重复发送时(同时还支持其他预设条件)，则终端设备可以从该分组中选择随机接入前导。应理解，value-a,value-b,value-c, value-d的值可以为任意整数。
在另一种情况中，当Group B的配置值为value-a,value-b,value-c,value-d中的一个或多个时，表示Group B(的前导)既可以对应于Msg3重复发送，还可以对应于Msg3的大小和/或路损。例如，配置值为value-a(更具体地，例如为64)，则表示用于竞争随机接入的前导中有numberOfRA-PreamblesGroupA个用于表示其中Msg3负载大于ra-Msg3SizeGroupA以及路损满足预设条件(或者路损大于根据配置信息确定的值)，同时有numberOfRA-PreamblesGroupA个用于表示以下至少一个条件：重复发送Msg3、负载不大于ra-Msg3SizeGroupA、路损小于预设值(或者根据配置信息确定的值)，其中，该重复发送Msg3可以表示以下一项或多项：需要重复发送Msg3、希望重复发送Msg3、具备重复发送Msg3的能力。再例如，配置值为value-a(更具体地，例如为108)，则表示用于竞争随机接入的前导中有numberOfRA-PreamblesGroupA个用于表示其中Msg3负载大于ra-Msg3SizeGroupA以及路损满足预设条件(或者路损大于根据配置信息确定的值)，同时有numberOfRA-PreamblesGroupA个用于表示以下至少一个条件：重复发送Msg3、负载不大于ra-Msg3SizeGroupA、路损小于预设值(或者根据配置信息确定的值)。
更进一步地，GroupB配置值ra-Msg3SizeGroupA(或value-a,value-b,value-c,value-d)还可以和Msg3的最大重复次数相关联。例如，value-a和value-b用于最大重复次数为8，而value-c和value-d用于最大重复次数为16。对应地应理解，随机接入响应消息中的上行调度授权或者调度Msg3重传的上行调度资源(即下行控制信息DCI)中，用于指示Msg3重复发送次数的字段分别为3比特和4比特。具体的配置信令示例如下：
Figure PCTCN2022113069-appb-000003
在一种实现方式中，还可以配置随机接入前导分组C(记为Group C)，该Group C与Msg3重复发送的发送方式相关联，或者说Group C用于指示Msg3重复发送，或者说RSRP小于Msg3重复门限值时，终端可以选择Group C中的前导进行随机接入。具体的配置信令示例如下：
Figure PCTCN2022113069-appb-000004
进一步地，当终端设备检测下行参考信号接收功率RSRP小于门限值与功率偏置值RSRPoffsetGroupC之和(或之差，以下以“和”为例进一步说明)时，可以选择Group C 中的前导进行随机接入。应理解，针对不同的随机接入类型、随机接入载波都需要配置不同的门限值，因此可以根据现有流程中的SUL门限值或SSB门限值或Msg A门限值等，以及该功率偏置值RSRPoffsetGroupC，来确定选择Group C的RSRP门限值。例如，当随机接入类型为4步随机接入时，选择Group C的RSRP门限值可以表示为“rsrp-ThresholdSSB+RSRPoffsetGroupC”，因此，当RSRP小于该“rsrp-ThresholdSSB+RSRPoffsetGroupC”时，终端设备选择Group C中的前导进行随机接入。又例如，当随机接入的载波类型为SUL时，选择Group C的RSRP门限值可以表示为“rsrp-ThresholdSSB-SUL+RSRPoffsetGroupC”，因此，当RSRP小于该“rsrp-ThresholdSSB-SUL+RSRPoffsetGroupC”时，终端设备选择Group C中的前导进行随机接入。又例如，当随机接入的载波类型为SUL、随机接入类型为2步随机接入时，选择Group C的RSRP门限值可以表示为“msgA-RSRP-Threshold+RSRPoffsetGroupC”，因此，当RSRP小于该“msgA-RSRP-Threshold+RSRPoffsetGroupC”时，终端设备选择Group C中的前导进行随机接入。又例如，当随机接入的载波类型为NUL、随机接入类型为2步随机接入时，选择Group C的RSRP门限值可以表示为“msgA-RSRP-ThresholdSSB+RSRPoffsetGroupC”，因此，当RSRP小于该“msgA-RSRP-ThresholdSSB+RSRPoffsetGroupC”时，终端设备选择Group C中的前导进行随机接入。
在另一种可能的实现方式中，上述方案还可以应用于两步随机接入过程重复发送消息A的方案。
另一种可能的实现方式中，终端设备确定Msg3的负载大小，当终端设备支持并且希望重复发送Msg3，且Msg3的负载大小小于Msg3重复门限值时，终端设备确定该Msg3的发送方式为：重复发送Msg3，否则终端设备确定该Msg3的发送方式为：不重复发送Msg3。通过这种实现方式，可以使得终端设备通过重复发送Msg3，以提升覆盖，并提高发送成功的概率，降低时延。
作为一个具体示例，可以配置随机接入前导分组C(记为Group C)，该Group C与Msg3重复发送的发送方式相关联，或者说Group C用于指示Msg3重复发送，其中，还可以配置字段ra-Msg3SizeGroupC与Msg3的最大重复次数相关联。
当终端设备支持Msg3重复发送，且Msg3大小小于ra-Msg3SizeGroupC时，终端设备使用分组C中前导进行基于竞争的随机接入，其中，该ra-Msg3SizeGroupC为配置的门限值。
具体的配置信令示例如下：
Figure PCTCN2022113069-appb-000005
}在另一种可能的实现方式中，上述方案还可以应用于两步随机接入过程重复发送消息A的方案，在这种情况下，消息A可以对应前述方案中的消息3(Msg3)，关于消息A的发送方式与消息3的发送方式类似，这里不再赘述。Group C还可以与消息A的重复发送的发送方式相关联，或者说，Group C用于指示消息A重复发送。例如，当终端设备支持消息A重复传输的方式时，且消息A大小小于ra-MsgASizeGroupC时，终端设备使用分组C中前导进行基于竞争的随机接入，其中，ra-MsgASizeGroupC为配置的门限值。具体的配置信令示例如下：
Figure PCTCN2022113069-appb-000006
应该理解，SSB关联的N个随机接入前导，其中的numberOfRA-PreamblesGroupA个前导用于随机接入前导分组B，其中的numberOfRA-PreamblesGroupC个前导用于随机接入前导分组C，剩下的用于随机接入前导分组B。或者，SSB关联的N个随机接入前导，其中的numberOfRA-PreamblesGroupA个前导用于随机接入前导分组B，其中的numberOfRA-PreamblesGroupC个前导也用于随机接入前导分组B，剩下的用于随机接入前导分组C。
进一步地，随机接入前导分组C还包括该分组对应的最大重复次数的指示信息。例如，配置信息中的字段maxNumberOfRepetitionsENUMERATED{n4,n8}表示该分组对应的最大重复次数。
S405，该终端设备选择随机接入前导。
示例性地，终端设备确定了随机接入前导分组/随机接入机会分组之后，在该随机接入前导分组/随机接入机会分组中选择随机接入前导。
S406，该终端设备发送随机接入前导。
终端设备选择随机接入前导之后，向网络设备发送该随机接入前导以进行随机接入。
对应的，网络设备接收来自终端设备的随机接入前导之后，确定该随机接入前导所对应的随机接入前导分组或随机接入机会分组，从而可以根据Msg3的发送方式为终端设备合理调度用于发送Msg3(初传和/或重传)的资源，使得资源能够得到有效利用。
上述技术方案，通过将随机接入前导分组或者随机接入机会分组与Msg3的发送方式相关联，使得网络设备在接收到来自终端设备的随机接入前导之后，可以根据该随机接入前导所在的随机接入前导分组或是随机接入机会分组，确定Msg3的发送方式，即确定终端设备是否需要重复发送Msg3、终端设备是否具有重复发送Msg3的能力、终端设备重复发送Msg3的次数、终端设备是否需要重复发送Msg3、终端设备是否希望被调度重复 发送Msg3等，从而使得网络设备可以合理调度资源，使得需要重复发送Msg3的终端设备(也就是覆盖性能比较差的终端设备)能够得到足够的资源重复发送Msg3，不需要重复发送Msg3的终端设备(即覆盖性能比较好的终端设备)能够采取比较少的资源，从而提升资源利用率。
另一种实现方式中，终端设备在选择随机接入的同步信号块之后，确定该随机接入的消息3的发送方式，该消息3的发送方式包括：该终端设备重复发送消息3，或该终端设备不重复发送消息3；该终端设备根据该消息3的发送方式，在第一随机接入前导分组或第一随机接入机会分组确定随机接入前导，该第一随机接入前导分组或第一随机接入机会分组与该消息3的发送方式相关联，该同步信号块与该第一随机接入前导分组或者该第一随机接入机会分组相关联；该终端设备向网络设备发送该随机接入前导。
其中，该终端设备重复发送该消息3，包括以下一种或多种情况：该终端设备希望重复发送该消息3、该终端设备具备重复发送该消息3的能力、该终端设备需要重复发送该消息3、该终端设备希望被调度重复发送该消息3、该终端设备发送该消息3的次数大于1次。
该终端设备不重复发送该消息3，包括以下一种或多种情况：该终端设备不具备重复发送该消息3的能力，该终端设备不需要重复发送该消息3、该终端设备不希望重复发送该消息3、该终端设备不希望被调度重复发送该消息3、该终端设备的发送该消息3的次数小于或等于1次。
或者，在另一种实现方式中，终端设备在选择随机接入的同步信号块之后，确定Msg3的发送方式，该Msg3的发送方式用于表示是否重复发送该Msg3和/或发送该Msg3的次数，该Msg3的发送方式与以下至少一种情况相关联：终端设备重复发送Msg3、终端设备不重复发送Msg3、终端设备发送Msg3的次数、终端设备具备重复发送Msg3的能力、终端设备不具备重复发送Msg3的能力、终端设备需要重复发送Msg3、终端设备不需要重复发送Msg3、终端设备希望被调度重复发送Msg3、终端设备不希望被调度重复发送Msg3。该终端设备根据该Msg3的发送方式，在第一随机接入前导分组或第一随机接入机会分组中选择随机接入前导，该第一随机接入前导分组或该第一随机接入机会分组与该Msg3的发送方式相关联，该同步信号块与该第一随机接入前导分组或者该第一随机接入机会相关联。
其中，终端设备确定Msg3的发送方式可以包括：终端设备测量参考信号接收功率RSRP，当RSRP小于第一门限值，该终端设备确定重复发送该Msg3，或者说终端设备确定Msg3的发送方式为重复发送Msg3。其中，该第一门限值由第二门限值和相对门限值确定，该第二门限值用于确定随机接入的载波类型，或随机接入的随机接入类型，或该同步信号快。
下面结合图10和图11介绍另一种随机接入的方法，其中，图11是图10中的方法500所对应的流程图。方法500包括：
S501，终端设备选择载波。
S502，该终端设备选择随机接入类型。
S503，该终端设备选择SSB。
应理解，S501～S503与方法400中的S401～S403类似，这里不再赘述。
S504，该终端设备确定Msg3的发送方式。
示例性地，可以向终端设备配置Msg3重复门限值，终端设备根据该Msg3重复门限值确定Msg3的发送方式。
一种可能的实现方式中，终端设备检测下行参考信号接收功率RSRP，当终端设备支持并且希望重复发送Msg3，且该RSRP小于Msg3重复门限值时，终端设备确定该Msg3的发送方式为：重复发送Msg3，否则终端设备确定该Msg3的发送方式为：不重复发送Msg3。通过这种实现方式，可以使得终端设备在信道链路质量比较差的情况下，通过重复发送Msg3，来提升Msg3的传输性能。
需要说明的是，上述实现方式中的Msg3重复门限值，可以是通过系统消息配置的，也可以是预定义的。
在上述可能的实现方式中的设定的门限值，可以是网络设备直接配置给终端设备的绝对门限值，也可以是终端设备根据相对门限值，以及SUL门限值、Msg A门限值、SSB门限值中的任意一项确定的。下面对门限值的几种可能的配置方式作示例性说明。
一示例，网络设备向终端设备配置绝对门限值，对应的信令示例如下：
Msg3Repetition-rsrp-Threshold RSRP-Range
这里的Msg3Repetition-rsrp-Threshold表示配置的绝对门限值。
支持并且希望在Msg3初传或者重传时，重复发送该Msg3的终端设备可以根据该门限值来确定Msg3的发送方式。例如，终端设备检测下行参考信号接收功率RSRP，当终端设备支持并且希望重复发送Msg3，且该RSRP小于Msg3Repetition-rsrp-Threshold时，终端设备确定该Msg3的发送方式为：重复发送Msg3。
需要说明的是，针对随机接入类型、随机接入载波、SSB都需要配置独立的门限值，这样的配置方式灵活度比较高。
另一示例，网络设备向终端设备配置相对门限值，对应的信令示例如下：
Msg3Repetition-rsrp-Offset ENUMERATED{infinity,dB3,dB5,dB8,dB10,dB12,dB15,dB18} OPTIONAL,
这里的Msg3Repetition-rsrp-Offset表示配置的相对门限值。上述信令中取值的数量以及具体的取值仅仅是一种示例，还可能是其他取值，本申请不做限定。
应理解，针对不同的随机接入类型、随机接入载波都需要配置不同的门限值，因此可以根据现有流程中的SUL门限值或SSB门限值或Msg A门限值等，以及该相对门限值，来确定Msg3重复门限值。例如，在方法500中，当随机接入类型为4步随机接入时，Msg3发送方式的门限值可以表示为“rsrp-ThresholdSSB－Msg3Repetition-rsrp-Offset”，因此，当RSRP小于该“rsrp-ThresholdSSB－Msg3Repetition-rsrp-Offset”时，终端设备确定Msg3的发送方式为：重复发送Msg3。又例如，当随机接入的载波类型为SUL时，Msg3发送方式的门限值可以表示为“rsrp-ThresholdSSB-SUL－Msg3Repetition-rsrp-Offset”，因此，当RSRP小于该“rsrp-ThresholdSSB-SUL－Msg3Repetition-rsrp-Offset”时，终端设备确定Msg3的发送方式为：重复发送Msg3。又例如，当随机接入的载波类型为SUL、随机接入类型为2步随机接入时，Msg3发送方式的门限值可以表示为“msgA-RSRP-Threshold－Msg3Repetition-rsrp-Offset”，因此，当RSRP小于该“msgA-RSRP-Threshold－Msg3Repetition-rsrp-Offset”时，终端设备确定Msg3的发送方式为：重复发送Msg3。又 例如，当随机接入的载波类型为NUL、随机接入类型为2步随机接入时，Msg3发送方式的门限值可以表示为“msgA-RSRP-ThresholdSSB－Msg3Repetition-rsrp-Offset”，因此，当RSRP小于该“msgA-RSRP-ThresholdSSB－Msg3Repetition-rsrp-Offset”时，终端设备确定Msg3的发送方式为：重复发送Msg3。以上以门限值与相对门限值之差为例说明，实际中还可以是门限值与相对门限值之和，这里不作限定。
应该理解，本申请中Msg3Repetition-rsrp-Offset与前述其它实施例中字段RSRPoffsetGroupC的物理意义类似，但是配置方式不同，例如RSRPoffsetGroupC与前导分组信息中配置，而Msg3Repetition-rsrp-Offset可以在其它任意位置配置。可以理解，后者配置灵活性更好。
需要说明的是，终端设备在确定Msg3的发送方式时，可以采用相对门限值和SUL门限值、SSB门限值、Msg A门限值中的任意一个来确定Msg3重复门限值。优选的，可以采用终端设备在确定Msg3的发送方式之前的上一步骤中所使用的门限值和相对门限值来确定Msg3重复门限值。例如，在方法500中，终端设备在选择SSB之后，确定Msg3的发送方式，因此终端设备可以根据SSB门限值和相对门限值来确定Msg3重复门限值。
下面对网络设备向终端设备配置相对门限值的几种可能的方式作示例性说明。
一示例，网络设备可以通过高层信令直接向终端设备配置相对门限值。
又一示例，网络设备可以向终端设备配置相对门限值(例如，Msg3Repetition-rsrp-Offset和/或RSRPoffsetGroupC)与Msg3发送方式的参数的关联关系。例如，网络设备向终端设备配置相对门限值(Msg3Repetition-rsrp-Offset和/或RSRPoffsetGroupC)与Msg3重复发送次数候选值集合中的最大值(maxNumberOfRepetitions)的关联关系。示例性地，表1示出了一种Msg3Repetition-rsrp-Offset与maxNumberOfRepetitions的关联关系。
表1
maxNumberOfRepetitions Msg3Repetition-rsrp-Offset
K0 H0
K1 H1
K2 H2
…… ……
其中K0,K1,K2,…,H0,H1,H2,…为非负整数。表2示出了一种具体示例。
表2
maxNumberOfRepetitions Msg3Repetition-rsrp-Offset
4 10
8 13
12 15
16 16
也就是说，终端设备可以根据maxNumberOfRepetitions以及该关联关系确定Msg3Repetition-rsrp-Offset。
其中，maxNumberOfRepetitions可以根据消息3的时域资源配置信息(或者物理上行共享信道(physical uplink shared channel,PUSCH)时域资源配置)确定，例如配置方式可以是：
Figure PCTCN2022113069-appb-000007
仅考虑重复次数，配置示例如下(其它与本实施例不相关的字段没有呈现)：
<PUSCH时域资源配置>
PUSCH-TimeDomainResourceAllocationList::＝{
puschAllocationList->PUSCH-Allocation->numberOfRepetitions＝n1.
puschAllocationList->PUSCH-Allocation->numberOfRepetitions＝n1.
puschAllocationList->PUSCH-Allocation->numberOfRepetitions＝n1.
puschAllocationList->PUSCH-Allocation->numberOfRepetitions＝n1.
puschAllocationList->PUSCH-Allocation->numberOfRepetitions＝n2.
puschAllocationList->PUSCH-Allocation->numberOfRepetitions＝n2.
puschAllocationList->PUSCH-Allocation->numberOfRepetitions＝n2.
puschAllocationList->PUSCH-Allocation->numberOfRepetitions＝n2.
puschAllocationList->PUSCH-Allocation->numberOfRepetitions＝n4.
puschAllocationList->PUSCH-Allocation->numberOfRepetitions＝n4.
puschAllocationList->PUSCH-Allocation->numberOfRepetitions＝n4.
puschAllocationList->PUSCH-Allocation->numberOfRepetitions＝n4.
puschAllocationList->PUSCH-Allocation->numberOfRepetitions＝n8.
puschAllocationList->PUSCH-Allocation->numberOfRepetitions＝n8.
puschAllocationList->PUSCH-Allocation->numberOfRepetitions＝n8.
puschAllocationList->PUSCH-Allocation->numberOfRepetitions＝n8.
}
根据以上配置可以获得maxNumberOfRepetitions的值为8。类似可以有更多实施例，有更多的配置项，或者其它配置值，本申请不做限定。
又一示例，网络设备可以向终端设备配置相对门限值(Msg3Repetition-rsrp-Offset和/或RSRPoffsetGroupC)与随机接入前导分组/随机接入机会分组的前导数量(msg3repetition-TotalNumberOfRA-Preambles)的关联关系。示例性地，表3示出了一种Msg3Repetition-rsrp-Offset与msg3repetition-TotalNumberOfRA-Preambles的关联关系。
表3
msg3repetition-TotalNumberOfRA-Preambles Msg3Repetition-rsrp-Offset
1～K0 H0
K0+1～K1 H1
K1+1～K2 H2
…… ……
其中K0,K1,K2,…,H0,H1,H2,…为非负整数。表4示出了一种具体示例。
表4
msg3repetition-TotalNumberOfRA-Preambles Msg3Repetition-rsrp-Offset
1～4 10
5～8 13
9～16 15
17～63 16
也就是说，终端设备可以根据msg3repetition-TotalNumberOfRA-Preambles以及该关联关系确定Msg3Repetition-rsrp-Offset。
又一示例，网络设备可以向终端设备配置相对门限值(例如，Msg3Repetition-rsrp-Offset和/或RSRPoffsetGroupC)与终端最大发送功率能力或者终端功率类型有关。例如，网络设备向终端设备配置相对门限值(Msg3Repetition-rsrp-Offset和/或RSRPoffsetGroupC)与Msg3重复发送次数候选值集合中的最大值(maxNumberOfRepetitions)的关联关系。表5示出了一种Msg3Repetition-rsrp-Offset与功率类型的关联关系。
表5
终端功率类型UE power class Msg3Repetition-rsrp-Offset
Class 1 O1
Class 2 O2
Class 3 O3
Class 4 O4
其中O1、O2、O3、O4为实数。它们的取值之间的关系例如是：O2＝O1+5；O3＝O1+8。进一步地，以上O1、O2、O3、O4的取值还与频率范围有关，即不同频率范围对应的最大功率输出能力不相同，因此需要采取不同的功率偏置值。
应理解，上述配置Msg3重复门限值的方式也可以适用于方法400，不同的是，对于方法400，终端设备可以根据Msg3重复门限值直接确定随机接入前导分组或随机接入机会分组，例如，终端设备检测下行参考信号接收功率RSRP，当RSRP小于Msg3重复门限值时，终端设备选择第四随机接入前导分组或第四随机接入机会分组，该第四随机接入前导分组或第四随机接入机会分组与重复发送Msg3的发送方式相关联。
应理解，上述Msg3重复门限值中的实施例可以联合使用，形成新的实施例。例如，相对门限值(例如，Msg3Repetition-rsrp-Offset和/或RSRPoffsetGroupC)与终端最大发送功率能力(或者终端功率类型)和重复次数最大值(maxNumberOfRepetitions)有关。再例如，相对门限值(例如，Msg3Repetition-rsrp-Offset和/或RSRPoffsetGroupC)与终端最大发送功率能力(或者终端功率类型)和分组的前导数量有关。
S505，该终端设备根据Msg3发送方式选择随机接入前导分组/或随机接入机会分组。
示例性地，终端设备根据该Msg3的发送方式，确定随机接入前导分组，该随机接入前导分组与该Msg3的发送方式相关联；或者终端设备根据该Msg3的发送方式，确定随机接入机会分组，该随机接入机会分组与该Msg3的发送方式相关联。也就是说，终端设备根据是否重复发送Msg3(和/或发送Msg3的次数)，来确定随机接入前导分组或随机接入机会分组，然后在该随机接入前导分组或者该随机接入机会分组中确定随机接入前导，该随机接入前导用于该终端设备进行随机接入。应理解，这里的随机接入机会分组既可以包含多个随机接入机会，也可以仅包含一个随机接入机会，即一个随机接入机会可以单独组成一个分组。
其中，该随机接入前导分组与该Msg3的发送方式相关联，指的是该随机接入前导分组可以指示该Msg3的发送方式，或者说，该随机接入前导用于该终端设备重复发送Msg3时进行随机接入的，或者该随机接入前导用于该终端设备不重复发送Msg3时进行随机接入的。可以提前配置不同的随机接入前导分组与不同的Msg3发送方式相关联。
一种示例，可以配置两个随机接入前导分组Group A和Group B，其中Group B与重复发送Msg3的发送方式相关联，网络设备可以通过对Group B配置预留值来指示网络设备支持在Group B中重复传输Msg3。具体配置方式与方法400的S404中的Group A和Group B类似，不再重复说明。
一种示例，Group C与Msg3重复发送的发送方式相关联(关于Group C的配置方式可以参见S404)，RSRPoffsetGroupC为配置给终端设备的相对门限值。测量SSB得到的RSRP记为SSB RSRP_measure。如果SSB RSRP_measure>RSRP_thre+RSRPoffsetGroupC， 且终端设备支持重复发送Msg3，则终端设备可以在选择GroupC(或者说可以在Group中选择随机接入前导)。其中，RSRP_thre为以下任意一个：msg3repetition-rsrp-Threshold,msg3repetition-rsrp-ThresholdSSB-SUL,msg3repetition-rsrp-Thr esholdSSB,rsrp-ThresholdSSB,rsrp-ThresholdCSI-RS,msgA-RSRP-ThresholdSSB,rsrp-Thresho ldSSB-SUL。
在一种实现方式中，随机接入前导分组或随机接入机会分组进一步还可以用于指示终端设备的能力信息。例如，分组D(记为Group D)用于降低能力(reduced capability)终端设备进行随机接入，降低能力终端设备可以在Group D选择随机接入前导。当网络设备从该Group D中检测到的随机接入前导时，确定该终端设备属于降低能力类别，从而方便进行后续的调度。
在一种实现方式中，Msg3重复发送(和/或重复次数)和降低能力这两种类型可以联合对应一个随机接入前导分组或随机接入机会分组(例如分组E，记为Group E)。因此，当降低能力终端设备确定Msg3的发送方式为重复发送Msg3时，该降低能力终端设备可以在Group E中选择随机接入前导。
在一种实现方式中，可以将Msg3重复发送对应的随机接入前导分组或随机接入机会分组，与降低能力终端设备对应的随机接入前导分组或随机接入机会分组位于一个关联周期中不同的循环关联中。例如，Msg3重复发送对应的随机接入前导分组或随机接入机会分组，位于一个关联周期中奇数编号的循环关联中；降低能力终端对应的随机接入前导分组或随机接入机会分组位于一个关联周期中偶数编号的循环关联中。又例如，Msg3重复发送对应的随机接入前导或随机接入机会分组，位于一个关联周期中偶数编号的循环关联中；降低能力终端对应的随机接入前导或机会的分组位于一个关联周期中奇数编号的循环关联中。
在一种实现方式中，随机接入前导分组或随机接入机会分组进一步还可以指示该分组的用途(或者该分组关联的终端需求、终端能力等)。例如，分组F(记为Group F)的分组用途为Msg3重复发送以及降低能力，可以通过usage配置信息来指示Group F的用途。例如，当Group F中usage配置信息对应为Msg3重复发送(msg3-repetition)时，表示该Group F用于重复发送Msg3；当分组中usage配置信息对应为降低能力(reduced-capacility)时，表示该Group F用于降低终端能力进行随机接入。应该理解，以上配置信息仅以分组用途为例，实际中的usage配置信息还可以包括更多信息，例如该分组的起始前导索引(或结束前导索引)、前导数量等。在一种实现方式中，随机接入前导分组或随机接入机会分组进一步还可以指示该分组的多个用途。例如，分组G(记为Group G)的分组用途为Msg3重复发送以及降低能力，配置中的字段指示该Group G同时用于Msg3重复发送以及降低能力。此时，当降低能力类别的终端设备需要重复发送Msg3时，可以从该Group G中选择随机接入前导。或者还可以是，Group G中一部分前导用于消息3重复发送，另一部分前导用于降低能力。具体地，前导分组中的前导数量为N个，可以是前面floor(N/2)个前导用于Msg3重复发送，其余的N-floor(N/2)用于降低能力；或者可以是，前面floor(N/2)个前导用于降低能力，其余的N-floor(N/2)用于消息3重复发送；或者可以是，奇数索引的前导用于降低能力，偶数索引的前导用于消息3重复发送。应该理解，以上配置信息仅以分组用途为例，实际中还可以包括更多信息，例如该分组的起始前 导索引(或结束前导索引)、前导数量。
例如，配置方式可以是：
Figure PCTCN2022113069-appb-000008
或者，
Figure PCTCN2022113069-appb-000009
本申请中，方法400、方法500、方法600、方法700、方法800等方法中所描述的实施例都可以用于其它方法中，例如方法400中描述的配置Group A和Group B的方案可以应用于方法500至方法800，不再重复说明。
图12示出了一种随机接入前导分组的配置方式示意图。在图12所示的配置方式中，一个随机接入机会中的若干个随机接入前导被分成多个组，其中至少一个随机接入前分组用于支持Msg3重复发送，或者说，其中至少一个随机接入前导分组用于Msg3重复发送时终端设备进行随机接入。例如，在图12中，SB1与随机接入机会y相关联，在随机接入机会y中，随机接入前导索引为0～x的随机接入前导为一个分组(记为分组#1)，随机接入前导索引为k0～k0+w-1的随机接入前导为另一个分组(记为分组#2)。该随机接入机会y中还可能包括其他分组，这里不再一一说明。同时，配置分组#1用于Msg3不重复发送，分组#2用于Msg3重复发送。类似地，SSB0与随机接入机会0相关联，在随机接入机会0中，随机接入前导分组与Msg3的发送方式的关联关系可以与随机接入机会y中相同，也可以不同。例如在随机接入机会0中，可以是前导序列索引为k0～k0+w-1的随机接入前导序列组成的分组用于Msg3重复发送，其他分组用于Msg3不重复发送；也可以是前导序列为0～x-1的随机接入前导序列组成的组用于Msg3重复发送，其他分组用于Msg3不重复发送，本申请对此不作限定。
这里需要说明的是，x或w的值，可以根据关联到该随机接入机会的SSB(或者下行信号)的数量、该分组中的总的随机接入前导的数量一起确定。例如，关联到某个随机接入机会的SSB数量为N(N可以大于1)，且用于支持Msg3重复发送的前导分组的总数量为K，可以根据N和K计算出w。具体地，当K可以整除N时，即，
Figure PCTCN2022113069-appb-000010
则关联到该随机接入前导分组(或者随机接入时机)的第n个SSB，对应的前导索引范围为
Figure PCTCN2022113069-appb-000011
例如，图13示出了一种随机接入机会的配置方式示意图。在图13所示的配置方式中，多个随机接入机会中的部分或一个随机接入机会中的随机接入前导，用于支持Msg3重复发送。例如，在图13中，SSB1与随机接入机会y+1、随机接入机会n0+z等多个随机接 入机会相关联，其中，配置随机接入机会n0+z中的随机接入前导用于Msg3重复发送，其余随机接入机会中的随机接入前导用于Msg3不重复发送。类似地，SSB0与随机接入机会0、随机接入机会n0等多个随机接入机会相关联，其中，配置随机接入机会n0中的随机接入前导用于Msg3重复发送，其余随机接入机会中的随机接入前导用于Msg3不重复发送。
可选地，SSB与随机接入机会分组或随机接入前导分组的关联周期(例如，一个关联周期对应若干个随机接入配置周期，时间为5ms的整数倍，或者整数个系统帧，即10ms的整数倍，典型值可以为10ms、20ms、40ms、80ms、160ms、320ms、640ms、1280ms、2560ms、5120ms、10240ms)中，包括多次循环关联(例如，一次循环关联是指将发送的SSB完整关联一次)。其中部分循环关联中，存在用于指示/对应Msg3重复发送的随机接入机会分组或者随机接入前导分组。进一步地，这些循环关联的时间位置(或者位于关联周期中的循环关联的编号)可以由网络设备指示。
S506，该终端设备选择随机接入前导。
示例性地，终端设备确定了随机接入前导分组/随机接入机会分组之后，在该随机接入前导分组/随机接入机会分组中选择随机接入前导。
S507，该终端设备发送随机接入前导。
终端设备选择随机接入前导之后，向网络设备发送该随机接入前导以进行随机接入。
对应的，网络设备接收来自终端设备的随机接入前导之后，确定该随机接入前导所对应的随机接入前导分组或随机接入机会分组，根据该随机接入前导分组或该随机接入机会分组与Msg3发送方式的关联关系确定Msg3的发送方式，即确定Msg3是否重复传输，进一步地，还可能确定Msg3的传输次数，从而为终端设备合理调度用于发送Msg3的资源，使得资源能够得到有效利用。
在一种实现方式中，基于本方式的随机接入时，网络设备配置用于Msg3重复发送的随机接入前导和/或随机接入机会分组(即随机接入时间和频率资源)不同于Msg3不重复发送的随机接入前导和/或随机接入机会分组。可选地，该资源由独立的随机接入资源配置索引prach-ConfigurationIndex指示随机接入时间资源。进一步地，该资源所在载波索引或带宽部分(或者初始上行接入带宽部分initialUplinkBWP)不同于Msg3不重复发送的载波索引或带宽部分。
在一种实现方式中，Msg3重复发送和Msg3不重复发送的随机接入前导，对应的随机接入响应关联的随机接入-无线网络临时标识(random access-radio network tempory identity，RA-RNTI)计算方式不相同。例如，Msg3不重复发送的随机接入前导的随机接入响应消息(或者随机接入响应对应的下行控制信息DCI)，由以下RNTI标识：
RA-RNTI＝1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id；
其中，s_id为随机接入前导所在随机接入机会的第一个OFDM符号索引(0≤s_id<14)；t_id为随机接入前导所在随机接入机会的时隙索引(在一个系统帧中，0≤t_id<80)，该时隙对应于随机接入前导/机会/格式的子载波间隔；f_id为随机接入前导所在随机接入机会的频域索引(0≤f_id<8)，ul_carrier_id为上行载波索引(0 for NUL carrier,and 1 for SUL carrier)。
应理解，上述方案还可以应用于两步随机接入过程重复发送消息A的方案，在这种情 况下，消息A可以对应前述方案中的消息3(Msg3)，关于消息A的发送方式与消息3的发送方式类似，这里不再赘述。类似地，MsgA不重复发送的随机接入前导的随机接入响应消息MSGB(或者MSGB对应的下行控制信息DCI)，由以下RNTI标识：
MSGB-RNTI＝1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id+14×80×8×2；
Msg3重复发送的随机接入前导的随机接入响应消息(或者随机接入响应对应的下行控制信息DCI)，由以下RNTI标识：
RA-RNTI＝1+(s_id+1)+14×t_id+14×80×f_id+14×80×8×ul_carrier_id；
即等价于：
RA-RNTI＝2+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id；
MsgA重复发送的随机接入前导的随机接入响应消息MSGB(或者MSGB对应的下行控制信息DCI)，由以下RNTI标识：
MSGB-RNTI＝1+(s_id+1)+14×t_id+14×80×f_id+14×80×8×ul_carrier_id+14×80×8×2；
即等价于：
MSGB-RNTI＝2+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id+14×80×8×2；应该理解，由于现有随机接入机会的时间长度最小为2个OFDM符号，采取以上机制可以避免用于不同消息3发送方式的随机接入前导/随机接入机会的响应消息在接收时产生混淆，从而导致随机接入失败。而且，采取该方式，不会导致随机接入Msg2或MsgB中RNTI所取值范围过于分散。
上述技术方案，通过将随机接入前导分组或者随机接入机会分组与Msg3的发送方式相关联，使得网络设备在接收到来自终端设备的随机接入前导之后，可以根据该随机接入前导所在的随机接入前导分组或是随机接入机会分组，确定Msg3的发送方式，即确定终端设备是否需要重复发送Msg3、终端设备是否具有重复发送Msg3的能力、终端设备重复发送Msg3的次数等，从而使得网络设备可以合理调度资源，使得需要重复发送Msg3的终端设备(也就是覆盖性能比较差的终端设备)能够得到足够的资源重复发送Msg3，不需要重复发送Msg3的终端设备(即覆盖性能比较好的终端设备)能够采取比较少的资源，从而提升资源利用率。
在又一种实现方式中，终端设备在选择随机接入的接入类型之后，和/或选择该随机接入的同步信号块之前，确定该随机接入的消息3的发送方式，该消息3的发送方式包括：该终端设备重复发送消息3，或终端设备不重复发送消息3；该终端设备根据该消息3的发送方式，在第一随机接入前导分组或第一随机接入机会分组确定随机接入前导，该第一随机接入前导分组或第一随机接入机会分组与该消息3的发送方式相关联，该同步信号块与该第一随机接入前导分组或者该第一随机接入机会分组相关联；该终端设备向网络设备发送该随机接入前导。
其中，该终端设备重复发送该消息3，包括以下一种或多种情况：该终端设备希望重复发送该消息3、该终端设备具备重复发送该消息3的能力、该终端设备需要重复发送该消息3、该终端设备希望被调度重复发送该消息3、该终端设备发送该消息3的次数大于1。
该终端设备不重复发送该消息3，包括以下一种或多种情况：该终端设备不具备重复发送该消息3的能力，该终端设备不需要重复发送该消息3、该终端设备不希望重复发送该消息3、该终端设备不希望被调度重复发送该消息3、该终端设备的发送该消息3的次数小于或等于1次。
或者，在又一种实现方式中，终端设备在选择随机接入的接入类型之后，确定Msg3的发送方式，和/或，终端设备在选择该随机接入的SSB之前，确定Msg3的发送方式。该Msg3的发送方式用于表示是否重复发送该Msg3和/或发送该Msg3的次数，该Msg3的发送方式与以下至少一种情况相关联：终端设备重复发送Msg3、终端设备不重复发送Msg3、终端设备发送Msg3的次数、终端设备具备重复发送Msg3的能力、终端设备不具备重复发送Msg3的能力、终端设备需要重复发送Msg3、终端设备不需要重复发送Msg3、终端设备希望被调度重复发送Msg3、终端设备不希望被调度重复发送Msg3。该终端设备在选择了SSB之后，在第一随机接入前导分组或第一随机接入机会分组中选择随机接入前导，其中，该SSB与该第一随机接入前导分组或该第一随机接入机会分组相关联，该第一随机接入前导分组或该第一随机接入机会分组与该Msg3的发送方式相关联。
下面结合图14和图15介绍一种随机接入的方法，其中，图15是图14中的方法600所对应的流程图。方法600包括：
S601，终端设备选择载波。
S602，该终端设备选择随机接入类型。
应理解，S601～S602与方法400中的S401～S402类似，这里不再赘述。
S603，该终端设备选择Msg3的发送方式。
示例性地，可以向终端设备配置Msg3重复门限值，终端设备根据该Msg3重复门限值确定Msg3的发送方式。
一种可能的实现方式中，终端设备检测下行参考信号接收功率RSRP，当终端设备支持并且希望重复发送Msg3，且该RSRP小于Msg3重复门限值时，终端设备确定该Msg3的发送方式为：重复发送Msg3，否则终端设备确定该Msg3的发送方式为：不重复发送Msg3。通过这种实现方式，可以使得终端设备在信道链路质量比较差的情况下，通过重复发送Msg3，来提升Msg3的传输性能。
另一种可能的实现方式中，终端设备确定Msg3的负载大小，当终端设备支持并且希望重复发送Msg3，且Msg3的负载大小小于Msg3重复门限值时，终端设备确定该Msg3的发送方式为：重复发送Msg3，否则终端设备确定该Msg3的发送方式为：不重复发送Msg3。通过这种实现方式，可以使得终端设备通过重复发送Msg3，以提升覆盖，并提高发送成功的概率，降低时延。
需要说明的是，上述实现方式中的Msg3重复门限值，可以是通过系统消息配置的，也可以是预定义的。具体配置方式与方法500中的S504所描述的方案类似，这里不再赘述。
S604，该终端设备选择SSB。
S604中终端设备选择SSB的方式与方法400中S403中的选择SSB的方式类似，但需要说明的是，在S604中，需要针对不同的Msg3的发送方式分别选择SSB。
然后进一步地，在S605，终端设备根据Msg3的发送方式选择随机接入前导分组/随 机接入机会分组。
示例性地，终端设备根据该Msg3的发送方式，确定随机接入前导分组，该随机接入前导分组与该Msg3的发送方式相关联；或者终端设备根据该Msg3的发送方式，确定随机接入机会分组，该随机接入机会分组与该Msg3的发送方式相关联。其中，随机接入前导分组或随机接入机会分组的配置方式与方法500中的S505部分介绍的方法类似，不再重复说明。
其中，随机接入前导分组或随机接入机会分组还可以指示终端设备的能力信息，或者指示该分组的用途，具体方式可以参见方法500中的相关描述，这里不再赘述。同时，该方案也适用于后续其他实施例，不再重复说明。
S606，该终端设备选择随机接入前导。
示例性地，终端设备确定了随机接入前导分组/随机接入机会分组之后，在该随机接入前导分组/随机接入机会分组中选择随机接入前导。
S607，该终端设备发送随机接入前导。
终端设备选择随机接入前导之后，向网络设备发送该随机接入前导以进行随机接入。
对应的，网络设备接收来自终端设备的随机接入前导之后，确定该随机接入前导所对应的随机接入前导分组或随机接入机会分组，根据该随机接入前导分组或该随机接入机会分组与Msg3发送方式的关联关系确定Msg3的发送方式，即确定Msg3是否重复传输，进一步地，还可能确定Msg3的传输次数，从而为终端设备合理调度用于发送Msg3的资源，使得资源能够得到有效利用。
上述技术方案，通过将随机接入前导分组或者随机接入机会分组与Msg3的发送方式相关联，使得网络设备在接收到来自终端设备的随机接入前导之后，可以根据该随机接入前导所在的随机接入前导分组或是随机接入机会分组，确定Msg3的发送方式，即确定终端设备是否需要重复发送Msg3、终端设备是否具有重复发送Msg3的能力、终端设备重复发送Msg3的次数等，从而使得网络设备可以合理调度资源，使得需要重复发送Msg3的终端设备(也就是覆盖性能比较差的终端设备)能够得到足够的资源重复发送Msg3，不需要重复发送Msg3的终端设备(即覆盖性能比较好的终端设备)能够采取比较少的资源，从而提升资源利用率。
在又一种实现方式中，终端设备在选择随机接入的载波之后，和/或选择该随机接入的接入类型之前，确定该随机接入的消息3的发送方式，该消息3的发送方式包括：该终端设备重复发送消息3，或终端设备不重复发送消息3；该终端设备根据该消息3的发送方式，在第一随机接入前导分组或第一随机接入机会分组确定随机接入前导，该第一随机接入前导分组或第一随机接入机会分组与该消息3的发送方式相关联，该同步信号块与该第一随机接入前导分组或者该第一随机接入机会分组相关联；该终端设备向网络设备发送该随机接入前导。
其中，该终端设备重复发送该消息3，包括以下一种或多种情况：该终端设备希望重复发送该消息3、该终端设备具备重复发送该消息3的能力、该终端设备需要重复发送该消息3、该终端设备希望被调度重复发送该消息3、该终端设备发送该消息3的次数大于1。
该终端设备不重复发送该消息3，包括以下一种或多种情况：该终端设备不具备重复 发送该消息3的能力，该终端设备不需要重复发送该消息3、该终端设备不希望重复发送该消息3、该终端设备不希望被调度重复发送该消息3、该终端设备的发送该消息3的次数小于或等于1次。
或者，在又一种实现方式中，终端设备在选择随机接入的载波类型之后，确定Msg3的发送方式，和/或，终端设备在选择该随机接入的接入类型之前，确定Msg3的发送方式。该Msg3的发送方式用于表示是否重复发送该Msg3和/或发送该Msg3的次数，该Msg3的发送方式包括以下至少一项：终端设备重复发送Msg3；终端设备不重复发送Msg3；终端设备发送Msg3的次数；终端设备具备重复发送Msg3的能力；终端设备不具备重复发送Msg3的能力、终端设备需要重复发送Msg3、终端设备不需要重复发送Msg3、终端设备希望被调度重复发送Msg3、终端设备不希望被调度重复发送Msg3。该终端设备在选择了随机接入类型和SSB之后，在第一随机接入前导分组或第一随机接入机会分组中选择随机接入前导，其中，该SSB与该第一随机接入前导分组或该第一随机接入机会分组相关联，该第一随机接入前导分组或该第一随机接入机会分组与该Msg3的发送方式相关联。
下面结合图16和图17介绍有一种随机接入的方法，其中，图17是图16中的方法700所对应的流程图。方法700包括：
S701，终端设备选择载波。
应理解，S701与方法400中的S401类似，这里不再赘述。
S702，该终端设备选择Msg3的发送方式。
示例性地，可以向终端设备配置Msg3重复门限值，终端设备根据该Msg3重复门限值确定Msg3的发送方式。
一种可能的实现方式中，终端设备检测下行参考信号接收功率RSRP，当终端设备支持并且希望重复发送Msg3，且该RSRP小于Msg3重复门限值时，终端设备确定该Msg3的发送方式为：重复发送Msg3，否则终端设备确定该Msg3的发送方式为：不重复发送Msg3。通过这种实现方式，可以使得终端设备在信道链路质量比较差的情况下，通过重复发送Msg3，来提升Msg3的传输性能。
另一种可能的实现方式中，终端设备确定Msg3的负载大小，当终端设备支持并且希望重复发送Msg3，且Msg3的负载大小小于Msg3重复门限值时，终端设备确定该Msg3的发送方式为：重复发送Msg3，否则终端设备确定该Msg3的发送方式为：不重复发送Msg3。通过这种实现方式，可以使得终端设备通过重复发送Msg3，以提升覆盖，并提高发送成功的概率，降低时延。
需要说明的是，上述实现方式中的Msg3重复门限值，可以是通过系统消息配置的，也可以是预定义的。具体配置方式与方法500中的S504所描述的方案类似，这里不再赘述。
S703，该终端设备选择随机接入类型。
S704，该终端设备选择SSB。
S703～S704与方法400中的S402～S403类似，但需要说明的是，在S703和S704中，终端设备。
需要针对不同的Msg3的发送方式分别选择随机接入类型和SSB。
S705，该终端设备根据Msg3的发送方式选择随机接入前导分组/随机接入机会分组。
示例性地，终端设备根据该Msg3的发送方式，确定随机接入前导分组，该随机接入前导分组与该Msg3的发送方式相关联；或者终端设备根据该Msg3的发送方式，确定随机接入机会分组，该随机接入机会分组与该Msg3的发送方式相关联。其中，随机接入前导分组或随机接入机会分组的配置方式与方法500中的S505部分介绍的方法类似，不再重复说明。
S706，该终端设备选择随机接入前导。
示例性地，终端设备确定了随机接入前导分组/随机接入机会分组之后，在该随机接入前导分组/随机接入机会分组中选择随机接入前导。
S707，该终端设备发送随机接入前导。
终端设备选择随机接入前导之后，向网络设备发送该随机接入前导以进行随机接入。
对应的，网络设备接收来自终端设备的随机接入前导之后，确定该随机接入前导所对应的随机接入前导分组或随机接入机会分组，根据该随机接入前导分组或该随机接入机会分组与Msg3发送方式的关联关系确定Msg3的发送方式，即确定Msg3是否重复传输，进一步地，还可能确定Msg3的传输次数，从而为终端设备合理调度用于发送Msg3的资源，使得资源能够得到有效利用。
在一种实现方式中，基于本方式的随机接入时，网络设备配置用于Msg3重复发送的随机接入前导和/或随机接入机会分组(即随机接入时间和频率资源)不同于Msg3不重复发送的随机接入前导和/或随机接入机会分组。可选地，该资源由独立的随机接入资源配置索引prach-ConfigurationIndex指示随机接入时间资源(Msg3不重复发送时的资源由prach-ConfigurationIndex0来指示，Msg3重复发送时的资源由prach-ConfigurationIndex1来指示)。
上述技术方案，通过将随机接入前导分组或者随机接入机会分组与Msg3的发送方式相关联，使得网络设备在接收到来自终端设备的随机接入前导之后，可以根据该随机接入前导所在的随机接入前导分组或是随机接入机会分组，确定Msg3的发送方式，即确定终端设备是否需要重复发送Msg3、终端设备是否具有重复发送Msg3的能力、终端设备重复发送Msg3的次数等，从而使得网络设备可以合理调度资源，使得需要重复发送Msg3的终端设备(也就是覆盖性能比较差的终端设备)能够得到足够的资源重复发送Msg3，不需要重复发送Msg3的终端设备(即覆盖性能比较好的终端设备)能够采取比较少的资源，从而提升资源利用率。
在又一种实现方式中，终端设备在选择随机接入的载波之前，确定该随机接入的消息3的发送方式，该消息3的发送方式包括：该终端设备重复发送消息3，或终端设备不重复发送消息3；该终端设备根据该消息3的发送方式，在第一随机接入前导分组或第一随机接入机会分组确定随机接入前导，该第一随机接入前导分组或第一随机接入机会分组与该消息3的发送方式相关联，该同步信号块与该第一随机接入前导分组或者该第一随机接入机会分组相关联；该终端设备向网络设备发送该随机接入前导。
其中，该终端设备重复发送该消息3，包括以下一种或多种情况：该终端设备希望重复发送该消息3、该终端设备具备重复发送该消息3的能力、该终端设备需要重复发送该消息3、该终端设备希望被调度重复发送该消息3。
该终端设备不重复发送该消息3，包括以下一种或多种情况：该终端设备不具备重复 发送该消息3的能力，该终端设备不需要重复发送该消息3、该终端设备不希望重复发送该消息3、该终端设备不希望被调度重复发送该消息3、该终端设备的发送该消息3的次数小于或等于1次。
在又一种实现方式中，终端设备在选择随机接入的载波类型之前，确定Msg3的发送方式，该Msg3的发送方式用于表示是否重复发送该Msg3和/或发送该Msg3的次数，该Msg3的发送方式与以下至少一种情况相关联：终端设备重复发送Msg3；终端设备不重复发送Msg3；终端设备发送Msg3的次数；终端具备重复发送Msg3的能力；终端不具备重复发送Msg3的能力、终端设备需要重复发送Msg3、终端设备不需要重复发送Msg3、终端设备希望被调度重复发送Msg3、终端设备不希望被调度重复发送Msg3。该终端设备根据该Msg3的发送方式在第一随机接入前导分组或第一随机接入机会分组中选择随机接入前导，该第一随机接入前导分组或该第一随机接入机会分组与该Msg3的发送方式相关联。
下面结合图18和图19介绍一种随机接入的方法，其中，图19是图18中的方法800所对应的流程图。方法800包括：
S801，终端设备选择Msg3的发送方式。
示例性地，可以向终端设备配置Msg3重复门限值，终端设备根据该Msg3重复门限值确定Msg3的发送方式。
一种可能的实现方式中，终端设备检测下行参考信号接收功率RSRP，当终端设备支持并且希望重复发送Msg3，且该RSRP小于Msg3重复门限值时，终端设备确定该Msg3的发送方式为：重复发送Msg3，否则终端设备确定该Msg3的发送方式为：不重复发送Msg3。通过这种实现方式，可以使得终端设备在信道链路质量比较差的情况下，通过重复发送Msg3，来提升Msg3的传输性能。
另一种可能的实现方式中，终端设备确定Msg3的负载大小，当终端设备支持并且希望重复发送Msg3，且Msg3的负载大小小于Msg3重复门限值时，终端设备确定该Msg3的发送方式为：重复发送Msg3，否则终端设备确定该Msg3的发送方式为：不重复发送Msg3。通过这种实现方式，可以使得终端设备通过重复发送Msg3，以提升覆盖，并提高发送成功的概率，降低时延。
需要说明的是，上述实现方式中的Msg3重复门限值，可以是通过系统消息配置的，也可以是预定义的。具体配置方式与方法500中的S504所描述的方案类似，这里不再赘述。
S802，该终端设备选择载波类型。
S803，该终端设备选择SSB。
S804，该终端设备选择随机接入类型。
应理解，S802～S804与方法400中的S401～S403类似，但需要说明的是，在S802～S804中，终端设备需要针对不同的Msg3的发送方式分别选择载波类型、随机接入类型和SSB。
S805，该终端设备根据Msg3的发送方式选择随机接入前导分组/随机接入机会分组。
示例性地，终端设备根据该Msg3的发送方式，确定随机接入前导分组，该随机接入前导分组与该Msg3的发送方式相关联；或者终端设备根据该Msg3的发送方式，确定随机接入机会分组，该随机接入机会分组与该Msg3的发送方式相关联。其中，随机接入前导分组或随机接入机会分组的配置方式与方法500中的S505部分介绍的方法类似，不再 重复说明。
S806，该终端设备选择随机接入前导。
示例性地，终端设备确定了随机接入前导分组/随机接入机会分组之后，在该随机接入前导分组/随机接入机会分组中选择随机接入前导。
S807，该终端设备发送随机接入前导。
终端设备选择随机接入前导之后，向网络设备发送该随机接入前导以进行随机接入。
对应的，网络设备接收来自终端设备的随机接入前导之后，确定该随机接入前导所对应的随机接入前导分组或随机接入机会分组，根据该随机接入前导分组或该随机接入机会分组与Msg3发送方式的关联关系确定Msg3的发送方式，即确定Msg3是否重复传输，进一步地，还可能确定Msg3的传输次数，从而为终端设备合理调度用于发送Msg3的资源，使得资源能够得到有效利用。
上述技术方案，通过将随机接入前导分组或者随机接入机会与Msg3的发送方式相关联，使得网络设备在接收到来自终端设备的随机接入前导之后，可以根据该随机接入前导所在的随机接入前导分组或是随机接入机会，确定Msg3的发送方式，即确定终端设备是否需要重复发送Msg3、终端设备是否具有重复发送Msg3的能力、终端设备重复发送Msg3的次数等，从而使得网络设备可以合理调度资源，使得需要重复发送Msg3的终端设备(也就是覆盖性能比较差的终端设备)能够得到足够的资源重复发送Msg3，不需要重复发送Msg3的终端设备(即覆盖性能比较好的终端设备)能够采取比较少的资源，从而提升资源利用率。
上述实施例的方案(方法400至方法800)中，随机接入前导分组或随机接入机会分组与消息3的发送方式相关联，终端设备可以通过选择随机接入前导分组或随机接入机会分组来指示是否重复发送消息3。在另一种场景中，随机接入前导或随机接入机会还可以与终端设备是否降低能力相关联，终端设备可以通过选择随机接入前导分组或随机接入机会分组来指示终端设备是否是需要降低能力的终端设备，在这种情况下，可以将上述方案中的“消息3的发送方式”替换为“终端设备的能力类型”，将“消息3重复发送”替换为“降低能力”，形成新的实施例，具体实现方式类似，不再重复说明；或者，将上述方案中的“消息3的发送方式”替换为“终端设备的能力类型”，将“消息A重复发送”替换为“降低能力”，形成新的实施例，具体实现方式类似，不再重复说明。在另一种场景下，还可以将上述方案中的“2-step RA”替换为“降低能力”，与4-step RA的方案对应，从而形成新的实施例，具体实现方式类似，不再重复说明。
以上，结合图3至图19详细说明了本申请实施例提供的方法。以下，结合图20至图22详细说明本申请实施例提供的确定随机接入前导的装置。
图20是本申请实施例提供的通信装置的示意性框图。如图所示，该通信装置10可以包括收发模块11和处理模块12。
在一种可能的设计中，该通信装置10可对应于上文方法实施例中的终端设备。
示例性地，该通信装置10可对应于根据本申请实施例的方法400至方法800中的终端设备，该通信装置10可以包括用于执行方法400至方法800中的终端设备执行的方法的模块。并且，该通信装置10中的各模块和上述其他操作和/或功能分别为了实现方法400至方法800的相应流程。该通信装置10中的该收发模块11执行上述各方法实施例中的终 端设备所执行的接收和发送操作，该处理模块12则执行除了该接收和发送操作之外的操作。
根据前述方法，图21为本申请实施例提供的通信装置20的示意图，如图21所示，该装置20可以为方法400至方法800中的终端设备。
该装置20可以包括处理器21(即，处理模块的一例)和存储器22。该存储器22用于存储指令，该处理器21用于执行该存储器22存储的指令，以使该装置20实现方法400至方法800中终端设备执行的步骤。
进一步地，该装置20还可以包括输入口23(即，收发模块的一例)和输出口24(即，收发模块的另一例)。进一步地，该处理器21、存储器22、输入口23和输出口24可以通过内部连接通路互相通信，传递控制和/或数据信号。该存储器22用于存储计算机程序，该处理器21可以用于从该存储器22中调用并运行该计算机程序，以控制输入口23接收信号，控制输出口24发送信号，完成上述方法中网络设备的步骤。该存储器22可以集成在处理器21中，也可以与处理器21分开设置。
可选地，若该通信装置20为通信设备，该输入口23为接收器，该输出口24为发送器。其中，接收器和发送器可以为相同或者不同的物理实体。为相同的物理实体时，可以统称为收发器。
可选地，若该通信装置20为芯片或电路，该输入口23为输入接口，该输出口24为输出接口。
作为一种实现方式，输入口23和输出口24的功能可以考虑通过收发电路或者收发的专用芯片实现。处理器21可以考虑通过专用处理芯片、处理电路、处理器或者通用芯片实现。
作为另一种实现方式，可以考虑使用通用计算机的方式来实现本申请实施例提供的通信设备。即将实现处理器21、输入口23和输出口24功能的程序代码存储在存储器22中，通用处理器通过执行存储器22中的代码来实现处理器21、输入口23和输出口24的功能。
该装置20所涉及的与本申请实施例提供的技术方案相关的概念，解释和详细说明及其他步骤请参见前述方法或其他实施例中关于这些内容的描述，此处不做赘述。
图22为本申请提供的一种通信装置30的结构示意图。为了便于说明，图22仅示出了通信装置的主要部件。如图22所示，通信装置30包括处理器、存储器、控制电路、天线以及输入输出装置。
处理器主要用于对通信协议以及通信数据进行处理，以及对整个终端设备进行控制，执行软件程序，处理软件程序的数据，例如用于支持终端设备执行上述传输预编码矩阵的指示方法实施例中所描述的动作。存储器主要用于存储软件程序和数据，例如存储上述实施例中所描述的码本。控制电路主要用于基带信号与射频信号的转换以及对射频信号的处理。控制电路和天线一起也可以叫做收发器，主要用于收发电磁波形式的射频信号。输入输出装置，例如触摸屏、显示屏，键盘等主要用于接收用户输入的数据以及对用户输出数据。
当通信装置开机后，处理器可以读取存储单元中的软件程序，解释并执行软件程序的指令，处理软件程序的数据。当需要通过无线发送数据时，处理器对待发送的数据进行基带处理后，输出基带信号至射频电路，射频电路将基带信号进行射频处理后将射频信号通 过天线以电磁波的形式向外发送。当有数据发送到终端设备时，射频电路通过天线接收到射频信号，将射频信号转换为基带信号，并将基带信号输出至处理器，处理器将基带信号转换为数据并对该数据进行处理。
本领域技术人员可以理解，为了便于说明，图22仅示出了一个存储器和处理器。在实际的终端设备中，可以存在多个处理器和存储器。存储器也可以称为存储介质或者存储设备等，本申请实施例对此不做限制。
作为一种可选的实现方式，处理器可以包括基带处理器和中央处理器，基带处理器主要用于对通信协议以及通信数据进行处理，中央处理器主要用于对整个终端设备进行控制，执行软件程序，处理软件程序的数据。图22中的处理器集成了基带处理器和中央处理器的功能，本领域技术人员可以理解，基带处理器和中央处理器也可以是各自独立的处理器，通过总线等技术互联。本领域技术人员可以理解，终端设备可以包括多个基带处理器以适应不同的网络制式，终端设备可以包括多个中央处理器以增强其处理能力，终端设备的各个部件可以通过各种总线连接。所述基带处理器也可以表述为基带处理电路或者基带处理芯片。所述中央处理器也可以表述为中央处理电路或者中央处理芯片。对通信协议以及通信数据进行处理的功能可以内置在处理器中，也可以以软件程序的形式存储在存储单元中，由处理器执行软件程序以实现基带处理功能。
如图22所示，通信装置30包括收发单元31和处理单元32。收发单元也可以称为收发器、收发机、收发装置等。可选的，可以将收发单元31中用于实现接收功能的器件视为接收单元，将收发单元31中用于实现发送功能的器件视为发送单元，即收发单元31包括接收单元和发送单元。可选地，该收发单元31可以包括发送单元和/或接收单元，该发送单元用于执行上述方法实施例中终端设备所执行的发送相关的操作，接收单元用于执行上述方法实施例中终端设备所执行的接收相关的操作。示例性的，接收单元也可以称为接收机、接收器、接收电路等，发送单元可以称为发射机、发射器或者发射电路等。
图22所示的终端设备可以执行上述方法400至方法800中终端设备所执行的各动作，这里，为了避免赘述，省略其详细说明。
本申请实施例还提供一种计算机可读存储介质，其上存储有用于实现上述方法实施例中由第网络设备执行的方法的计算机指令。
例如，该计算机程序被计算机执行时，使得该计算机可以实现上述方法实施例中由网络设备执行的方法。
本申请实施例还提供一种包含指令的计算机程序产品，该指令被计算机执行时使得该计算机实现上述方法实施例中由第一设备执行的方法，或由第二设备执行的方法。
本申请实施例还提供一种通信系统，该通信系统包括上文实施例中的网络设备。
上述提供的任一种装置中相关内容的解释及有益效果均可参考上文提供的对应的方法实施例，此处不再赘述。
在本申请实施例中，网络设备可以包括硬件层、运行在硬件层之上的操作系统层，以及运行在操作系统层上的应用层。其中，硬件层可以包括中央处理器(central processing unit，CPU)、内存管理单元(memory management unit，MMU)和内存(也称为主存)等硬件。操作系统层的操作系统可以是任意一种或多种通过进程(process)实现业务处理的计算机操作系统，例如，Linux操作系统、Unix操作系统、Android操作系统、iOS操作系统或 windows操作系统等。应用层可以包含浏览器、通讯录、文字处理软件、即时通信软件等应用。
本申请实施例并未对本申请实施例提供的方法的执行主体的具体结构进行特别限定，只要能够通过运行记录有本申请实施例提供的方法的代码的程序，以根据本申请实施例提供的方法进行通信即可。例如，本申请实施例提供的方法的执行主体可以是网络设备，或者，是网络设备中能够调用程序并执行程序的功能模块。
本申请的各个方面或特征可以实现成方法、装置或使用标准编程和/或工程技术的制品。本文中使用的术语“制品”可以涵盖可从任何计算机可读器件、载体或介质访问的计算机程序。例如，计算机可读介质可以包括但不限于：磁存储器件(例如，硬盘、软盘或磁带等)，光盘(例如，CD、DVD)，智能卡和闪存器件(例如，可擦写可编程只读存储器EPROM)、卡、棒或钥匙驱动器等)。
本文描述的各种存储介质可代表用于存储信息的一个或多个设备和/或其它机器可读介质。术语“机器可读介质”可以包括但不限于：无线信道和能够存储、包含和/或承载指令和/或数据的各种其它介质。
应理解，本申请实施例中提及的处理器可以是中央处理单元CPU，还可以是其他通用处理器、数字信号处理器(digital signal processor，DSP)、专用集成电路(application specific integrated circuit，ASIC)、现成可编程门阵列(field programmable gate array，FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。
还应理解，本申请实施例中提及的存储器可以是易失性存储器或非易失性存储器，或可包括易失性和非易失性存储器两者。其中，非易失性存储器可以是只读存储器(read-only memory，ROM)、可编程只读存储器(programmable ROM，PROM)、EPROM、电可擦除可编程只读存储器(electrically EPROM，EEPROM)或闪存。易失性存储器可以是随机存取存储器(random access memory，RAM)。例如，RAM可以用作外部高速缓存。作为示例而非限定，RAM可以包括如下多种形式：静态随机存取存储器(static RAM，SRAM)、动态随机存取存储器(dynamic RAM，DRAM)、同步动态随机存取存储器(synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(double data rate SDRAM，DDR SDRAM)、增强型同步动态随机存取存储器(enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(synchlink DRAM，SLDRAM)和直接内存总线随机存取存储器(direct rambus RAM，DR RAM)。
需要说明的是，当处理器为通用处理器、DSP、ASIC、FPGA或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件时，存储器(存储模块)可以集成在处理器中。
还需要说明的是，本文描述的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的保 护范围。
所属领域的技术人员可以清楚地了解到，为描述方便和简洁，上述描述的装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。此外，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元实现本申请提供的方案。
另外，在本申请各个实施例中的各功能单元可以集成在一个单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行所述计算机程序指令时，全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。例如，所述计算机可以是个人计算机，服务器，或者网络设备等。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质，(例如，软盘、硬盘、磁带)、光介质(例如，DVD)、或者半导体介质(例如固态硬盘(solid state disk，(SSD))等。例如，前述的可用介质可以包括但不限于：U盘、移动硬盘、只读存储器ROM、随机存取存储器RAM、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到的变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求和说明书的保护范围为准。

Claims (36)

  1. 一种随机接入的方法，其特征在于，包括：
    终端设备在至少两个随机接入前导分组中确定第一随机接入前导分组，所述至少两个随机接入前导分组与消息3的发送方式相关联，所述消息3用于随机接入，所述消息3的发送方式包括：所述终端设备重复发送所述消息3，或者所述终端设备不重复发送所述消息3，所述至少两个随机接入前导分组中至少有一个随机接入前导分组与所述终端设备重复发送所述消息3相关联；
    所述终端设备在所述第一随机接入前导分组确定随机接入前导；
    所述终端设备向网络设备发送所述随机接入前导。
  2. 根据权利要求1所述的方法，其特征在于，所述终端设备在至少两个随机接入前导分组中确定第一随机接入前导分组，包括：
    所述终端设备接收来自网络设备的指示信息；
    所述终端设备根据所述指示信息确定所述第一随机接入前导分组与所述终端设备重复发送所述消息3相关联；
    当所述消息3的发送方式为所述终端设备重复发送所述消息3，所述终端设备在至少两个随机接入前导分组中确定所述第一随机接入前导分组。
  3. 根据权利要求1或2所述的方法，其特征在于，所述终端设备在至少两个随机接入前导分组中确定第一随机接入前导分组，包括：
    所述终端设备测量参考信号接收功率RSRP；
    当所述RSRP小于第一门限值，所述终端设备在所述至少两个随机接入前导分组中确定所述第一随机接入前导分组，所述第一随机接入前导分组与终端设备重复发送所述消息3的发送方式相关联，所述第一门限值由第二门限值和相对门限值确定，所述第二门限值用于确定所述随机接入的载波类型或所述随机接入的随机接入类型或所述同步信号块。
  4. 根据权利要求3所述的方法，其特征在于，所述方法还包括：
    所述终端设备根据所述消息3的最大重复发送次数确定所述相对门限值，所述消息3的最大重复发送次数与所述相对门限值相关联；或者，
    所述终端设备根据所述第一随机接入前导分组中的随机接入前导的数量确定所述相对门限值，所述第一随机接入前导分组中的随机接入前导的数量与所述相对门限值相关联；或者，
    所述终端设备根据所述第一随机接入机会分组中的随机接入前导的数量确定所述相对门限值，所述第一随机接入机会分组中的随机接入前导的数量与所述相对门限值相关联；或者，
    所述终端设备根据所述终端设备的最大发送功率能力或功率类型确定所述相对门限值，所述终端设备的最大发送功率能力或功率类型与所述相对门限值相关联。
  5. 一种随机接入的方法，其特征在于，包括：
    终端设备在选择随机接入的同步信号块之后，确定所述随机接入的消息3的发送方式，所述消息3的发送方式包括：所述终端设备重复发送所述消息3，或所述终端设备不重复 发送所述消息3；
    所述终端设备根据所述消息3的发送方式，在第一随机接入前导分组或第一随机接入机会分组确定随机接入前导，所述第一随机接入前导分组或第一随机接入机会分组与所述消息3的发送方式相关联，所述同步信号块与所述第一随机接入前导分组或者所述第一随机接入机会分组相关联；
    所述终端设备向网络设备发送所述随机接入前导。
  6. 根据权利要求5所述的方法，其特征在于，所述终端设备在选择随机接入的同步信号块之后，确定所述随机接入的消息3的发送方式，包括：
    所述终端设备测量参考信号接收功率RSRP；
    当所述RSRP小于第一门限值，所述终端设备确定重复发送所述消息3，所述第一门限值由第二门限值和相对门限值确定，所述第二门限值用于确定所述随机接入的载波类型或所述随机接入的随机接入类型或所述同步信号块。
  7. 根据权利要求6所述的方法，其特征在于，所述方法还包括：
    所述终端设备根据所述消息3的最大重复发送次数确定所述相对门限值，所述消息3的最大重复发送次数与所述相对门限值相关联；或者，
    所述终端设备根据所述第一随机接入前导分组中的随机接入前导的数量确定所述相对门限值，所述第一随机接入前导分组中的随机接入前导的数量与所述相对门限值相关联；或者，
    所述终端设备根据所述第一随机接入机会分组中的随机接入前导的数量确定所述相对门限值，所述第一随机接入机会分组中的随机接入前导的数量与所述相对门限值相关联；或者，
    所述终端设备根据所述终端设备的最大发送功率能力或功率类型确定所述相对门限值，所述终端设备的最大发送功率能力或功率类型与所述相对门限值相关联。
  8. 一种随机接入的方法，其特征在于，包括：
    终端设备在选择随机接入的接入类型之后，和/或选择所述随机接入的同步信号块之前，确定所述随机接入的消息3的发送方式，所述消息3的发送方式包括：所述终端设备重复发送消息3，或终端设备不重复发送消息3；
    所述终端设备根据所述消息3的发送方式，在第一随机接入前导分组或第一随机接入机会分组确定随机接入前导，所述第一随机接入前导分组或第一随机接入机会分组与所述消息3的发送方式相关联，所述同步信号块与所述第一随机接入前导分组或者所述第一随机接入机会分组相关联；
    所述终端设备向网络设备发送所述随机接入前导。
  9. 根据权利要求8所述的方法，其特征在于，所述终端设备在选择随机接入的接入类型之后，和/或选择所述随机接入的同步信号块之前，确定所述随机接入的消息3的发送方式，包括：
    所述终端设备测量参考信号接收功率RSRP；
    当所述RSRP小于第一门限值，所述终端设备确定重复发送所述消息3，所述第一门限值由第二门限值和相对门限值确定，所述第二门限值用于确定所述随机接入的载波类型或所述随机接入的随机接入类型或所述同步信号块。
  10. 根据权利要求9所述的方法，其特征在于，所述方法还包括：
    所述终端设备根据所述消息3的最大重复发送次数确定所述相对门限值，所述消息3的最大重复发送次数与所述相对门限值相关联；或者，
    所述终端设备根据所述第一随机接入前导分组中的随机接入前导的数量确定所述相对门限值，所述第一随机接入前导分组中的随机接入前导的数量与所述相对门限值相关联；或者，
    所述终端设备根据所述第一随机接入机会分组中的随机接入前导的数量确定所述相对门限值，所述第一随机接入机会分组中的随机接入前导的数量与所述相对门限值相关联；或者，
    所述终端设备根据所述终端设备的最大发送功率能力或功率类型确定所述相对门限值，所述终端设备的最大发送功率能力或功率类型与所述相对门限值相关联。
  11. 一种随机接入的方法，其特征在于，包括：
    终端设备在选择随机接入的载波之后，和/或选择所述随机接入的接入类型之前，确定所述随机接入的消息3的发送方式，所述消息3的发送方式包括：所述终端设备重复发送消息3，或终端设备不重复发送消息3；
    所述终端设备根据所述消息3的发送方式，在第一随机接入前导分组或第一随机接入机会分组确定随机接入前导，所述第一随机接入前导分组或第一随机接入机会分组与所述消息3的发送方式相关联，所述同步信号块与所述第一随机接入前导分组或者所述第一随机接入机会分组相关联；
    所述终端设备向网络设备发送所述随机接入前导。
  12. 根据权利要求11所述的方法，其特征在于，所述终端设备在选择随机接入的载波之后，和/或选择所述随机接入的接入类型之前，确定所述随机接入的消息3的发送方式，包括：
    所述终端设备测量参考信号接收功率RSRP；
    当所述RSRP小于第一门限值，所述终端设备确定重复发送所述消息3，所述第一门限值由第二门限值和相对门限值确定，所述第二门限值用于确定所述随机接入的载波类型或所述随机接入的随机接入类型或所述同步信号块。
  13. 根据权利要求12所述的方法，其特征在于，所述方法还包括：
    所述终端设备根据所述消息3的最大重复发送次数确定所述相对门限值，所述消息3的最大重复发送次数与所述相对门限值相关联；或者，
    所述终端设备根据所述第一随机接入前导分组中的随机接入前导的数量确定所述相对门限值，所述第一随机接入前导分组中的随机接入前导的数量与所述相对门限值相关联；或者，
    所述终端设备根据所述第一随机接入机会分组中的随机接入前导的数量确定所述相对门限值，所述第一随机接入机会分组中的随机接入前导的数量与所述相对门限值相关联；或者，
    所述终端设备根据所述终端设备的最大发送功率能力或功率类型确定所述相对门限值，所述终端设备的最大发送功率能力或功率类型与所述相对门限值相关联。
  14. 一种随机接入的方法，其特征在于，包括：
    终端设备在选择随机接入的载波之前，确定所述随机接入的消息3的发送方式，所述消息3的发送方式包括：所述终端设备重复发送消息3，或终端设备不重复发送消息3；
    所述终端设备根据所述消息3的发送方式，在第一随机接入前导分组或第一随机接入机会分组确定随机接入前导，所述第一随机接入前导分组或第一随机接入机会分组与所述消息3的发送方式相关联，所述同步信号块与所述第一随机接入前导分组或者所述第一随机接入机会分组相关联；
    所述终端设备向网络设备发送所述随机接入前导。
  15. 根据权利要求14所述的方法，其特征在于，所述终端设备在选择随机接入的载波之前，确定所述随机接入的消息3的发送方式，包括：
    所述终端设备测量参考信号接收功率RSRP；
    当所述RSRP小于第一门限值，所述终端设备确定重复发送所述消息3，所述第一门限值由第二门限值和相对门限值确定，所述第二门限值用于确定所述随机接入的载波类型或所述随机接入的随机接入类型或所述同步信号块。
  16. 根据权利要求15所述的方法，其特征在于，所述方法还包括：
    所述终端设备根据所述消息3的最大重复发送次数确定所述相对门限值，所述消息3的最大重复发送次数与所述相对门限值相关联；或者，
    所述终端设备根据所述第一随机接入前导分组中的随机接入前导的数量确定所述相对门限值，所述第一随机接入前导分组中的随机接入前导的数量与所述相对门限值相关联；或者，
    所述终端设备根据所述第一随机接入机会分组中的随机接入前导的数量确定所述相对门限值，所述第一随机接入机会分组中的随机接入前导的数量与所述相对门限值相关联；或者，
    所述终端设备根据所述终端设备的最大发送功率能力或功率类型确定所述相对门限值，所述终端设备的最大发送功率能力或功率类型与所述相对门限值相关联。
  17. 一种随机接入的装置，其特征在于，包括：
    处理模块，用于在至少两个随机接入前导分组中确定第一随机接入前导分组，所述至少两个随机接入前导分组与消息3的发送方式相关联，所述消息3用于随机接入，所述消息3的发送方式包括：重复发送所述消息3，或者不重复发送所述消息3，所述至少两个随机接入前导分组中至少有一个随机接入前导分组与所述收发模块重复发送所述消息3相关联；
    所述处理模块，还用于在所述第一随机接入前导分组确定随机接入前导；
    收发模块，用于向网络设备发送所述随机接入前导。
  18. 根据权利要求1所述的装置，其特征在于，
    所述收发模块，具体用于接收来自所述网络设备的指示信息；
    所述处理模块，具体用于根据所述指示信息确定所述第一随机接入前导分组与重复发送所述消息3相关联；
    所述收发模块，具体还用于当所述消息3的发送方式为重复发送所述消息3，在至少两个随机接入前导分组中确定所述第一随机接入前导分组。
  19. 根据权利要求1或2所述的装置，其特征在于，
    所述处理模块，具体用于测量参考信号接收功率RSRP；
    所述处理模块，具体还用于当所述RSRP小于第一门限值，在所述至少两个随机接入前导分组中确定所述第一随机接入前导分组，所述第一随机接入前导分组与收发模块重复发送所述消息3的发送方式相关联，所述第一门限值由第二门限值和相对门限值确定，所述第二门限值用于确定所述随机接入的载波类型或所述随机接入的随机接入类型或所述同步信号块。
  20. 根据权利要求3所述的装置，其特征在于，
    所述处理模块，还用于根据所述消息3的最大重复发送次数确定所述相对门限值，所述消息3的最大重复发送次数与所述相对门限值相关联；或者，
    所述处理模块，还用于根据所述第一随机接入前导分组中的随机接入前导的数量确定所述相对门限值，所述第一随机接入前导分组中的随机接入前导的数量与所述相对门限值相关联；或者，
    所述处理模块，还用于根据所述第一随机接入机会分组中的随机接入前导的数量确定所述相对门限值，所述第一随机接入机会分组中的随机接入前导的数量与所述相对门限值相关联；或者，
    所述处理模块，还用于根据所述装置的最大发送功率能力或功率类型确定所述相对门限值，所述最大发送功率能力或功率类型与所述相对门限值相关联。
  21. 一种随机接入的装置，其特征在于，包括：
    处理模块，用于在选择随机接入的同步信号块之后，确定所述随机接入的消息3的发送方式，所述消息3的发送方式包括：重复发送所述消息3，或不重复发送所述消息3；
    所述处理模块，还用于根据所述消息3的发送方式，在第一随机接入前导分组或第一随机接入机会分组确定随机接入前导，所述第一随机接入前导分组或第一随机接入机会分组与所述消息3的发送方式相关联，所述同步信号块与所述第一随机接入前导分组或者所述第一随机接入机会分组相关联；
    收发模块，用于向网络设备发送所述随机接入前导。
  22. 根据权利要求5所述的装置，其特征在于，
    所述处理模块，具体用于测量参考信号接收功率RSRP；
    所述处理模块，具体还用于当所述RSRP小于第一门限值，确定重复发送所述消息3，所述第一门限值由第二门限值和相对门限值确定，所述第二门限值用于确定所述随机接入的载波类型或所述随机接入的随机接入类型或所述同步信号块。
  23. 根据权利要求6所述的装置，其特征在于，
    所述处理模块，还用于根据所述消息3的最大重复发送次数确定所述相对门限值，所述消息3的最大重复发送次数与所述相对门限值相关联；或者，
    所述处理模块，还用于根据所述第一随机接入前导分组中的随机接入前导的数量确定所述相对门限值，所述第一随机接入前导分组中的随机接入前导的数量与所述相对门限值相关联；或者，
    所述处理模块，还用于根据所述第一随机接入机会分组中的随机接入前导的数量确定所述相对门限值，所述第一随机接入机会分组中的随机接入前导的数量与所述相对门限值相关联；或者，
    所述处理模块，还用于根据所述装置的最大发送功率能力或功率类型确定所述相对门限值，所述最大发送功率能力或功率类型与所述相对门限值相关联。
  24. 一种随机接入的装置，其特征在于，包括：
    处理模块，用于在选择随机接入的接入类型之后，和/或选择所述随机接入的同步信号块之前，确定所述随机接入的消息3的发送方式，所述消息3的发送方式包括：重复发送消息3，或不重复发送消息3；
    所述处理模块，还用于根据所述消息3的发送方式，在第一随机接入前导分组或第一随机接入机会分组确定随机接入前导，所述第一随机接入前导分组或第一随机接入机会分组与所述消息3的发送方式相关联，所述同步信号块与所述第一随机接入前导分组或者所述第一随机接入机会分组相关联；
    收发模块，用于向网络设备发送所述随机接入前导。
  25. 根据权利要求8所述的装置，其特征在于，
    所述处理模块，具体用于测量参考信号接收功率RSRP；
    所述处理模块，具体还用于当所述RSRP小于第一门限值，确定重复发送所述消息3，所述第一门限值由第二门限值和相对门限值确定，所述第二门限值用于确定所述随机接入的载波类型或所述随机接入的随机接入类型或所述同步信号块。
  26. 根据权利要求9所述的装置，其特征在于，
    所述处理模块，还用于根据所述消息3的最大重复发送次数确定所述相对门限值，所述消息3的最大重复发送次数与所述相对门限值相关联；或者，
    所述处理模块，还用于根据所述第一随机接入前导分组中的随机接入前导的数量确定所述相对门限值，所述第一随机接入前导分组中的随机接入前导的数量与所述相对门限值相关联；或者，
    所述处理模块，还用于根据所述第一随机接入机会分组中的随机接入前导的数量确定所述相对门限值，所述第一随机接入机会分组中的随机接入前导的数量与所述相对门限值相关联；或者，
    所述处理模块，还用于根据所述装置的最大发送功率能力或功率类型确定所述相对门限值，所述最大发送功率能力或功率类型与所述相对门限值相关联。
  27. 一种随机接入的装置，其特征在于，包括：
    处理模块，用于在选择随机接入的载波之后，和/或选择所述随机接入的接入类型之前，确定所述随机接入的消息3的发送方式，所述消息3的发送方式包括：重复发送消息3，或不重复发送消息3；
    所述处理模块，还用于根据所述消息3的发送方式，在第一随机接入前导分组或第一随机接入机会分组确定随机接入前导，所述第一随机接入前导分组或第一随机接入机会分组与所述消息3的发送方式相关联，所述同步信号块与所述第一随机接入前导分组或者所述第一随机接入机会分组相关联；
    处理模块，用于向网络设备发送所述随机接入前导。
  28. 根据权利要求11所述的装置，其特征在于，
    所述处理模块，具体用于测量参考信号接收功率RSRP；
    所述处理模块，具体还用于当所述RSRP小于第一门限值，确定重复发送所述消息3， 所述第一门限值由第二门限值和相对门限值确定，所述第二门限值用于确定所述随机接入的载波类型或所述随机接入的随机接入类型或所述同步信号块。
  29. 根据权利要求12所述的装置，其特征在于，
    所述处理模块，还用于根据所述消息3的最大重复发送次数确定所述相对门限值，所述消息3的最大重复发送次数与所述相对门限值相关联；或者，
    所述处理模块，还用于根据所述第一随机接入前导分组中的随机接入前导的数量确定所述相对门限值，所述第一随机接入前导分组中的随机接入前导的数量与所述相对门限值相关联；或者，
    所述处理模块，还用于根据所述第一随机接入机会分组中的随机接入前导的数量确定所述相对门限值，所述第一随机接入机会分组中的随机接入前导的数量与所述相对门限值相关联；或者，
    所述处理模块，还用于根据所述装置的最大发送功率能力或功率类型确定所述相对门限值，所述最大发送功率能力或功率类型与所述相对门限值相关联。
  30. 一种随机接入的装置，其特征在于，包括：
    处理模块，用于在选择随机接入的载波之前，确定所述随机接入的消息3的发送方式，所述消息3的发送方式包括：重复发送消息3，或不重复发送消息3；
    所述处理模块，还用于根据所述消息3的发送方式，在第一随机接入前导分组或第一随机接入机会分组确定随机接入前导，所述第一随机接入前导分组或第一随机接入机会分组与所述消息3的发送方式相关联，所述同步信号块与所述第一随机接入前导分组或者所述第一随机接入机会分组相关联；
    收发模块，用于向网络设备发送所述随机接入前导。
  31. 根据权利要求14所述的装置，其特征在于，
    所述处理模块，具体用于测量参考信号接收功率RSRP；
    所述处理模块，具体还用于当所述RSRP小于第一门限值，确定重复发送所述消息3，所述第一门限值由第二门限值和相对门限值确定，所述第二门限值用于确定所述随机接入的载波类型或所述随机接入的随机接入类型或所述同步信号块。
  32. 根据权利要求15所述的装置，其特征在于，
    所述处理模块，还用于根据所述消息3的最大重复发送次数确定所述相对门限值，所述消息3的最大重复发送次数与所述相对门限值相关联；或者，
    所述处理模块，还用于根据所述第一随机接入前导分组中的随机接入前导的数量确定所述相对门限值，所述第一随机接入前导分组中的随机接入前导的数量与所述相对门限值相关联；或者，
    所述处理模块，还用于根据所述第一随机接入机会分组中的随机接入前导的数量确定所述相对门限值，所述第一随机接入机会分组中的随机接入前导的数量与所述相对门限值相关联；或者，
    所述处理模块，还用于根据所述装置的最大发送功率能力或功率类型确定所述相对门限值，所述最大发送功率能力或功率类型与所述相对门限值相关联。
  33. 一种通信装置，其特征在于，用于执行如权利要求1至16中任一项所述的方法。
  34. 一种通信装置，其特征在于，所述通信装置包括处理器、存储器以及存储在存储 器上并可在所述处理器上运行的指令，当所述指令被运行时，使得所述通信装置执行如权利要求1至16中任一项所述的方法。
  35. 一种计算机可读存储介质，其特征在于，包括指令，当所述指令在计算机上运行时，使得计算机执行如权利要求1至16中任一项所述的方法。
  36. 一种计算机程序产品，其特征在于，包括计算机程序指令，所述计算机程序指令在计算机上运行时，使得计算机执行如权利要求1至16中任一项所述的方法。
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107409421A (zh) * 2015-04-03 2017-11-28 夏普株式会社 无线通信系统、终端装置、基站装置、无线通信方法及集成电路
WO2020143549A1 (en) * 2019-01-07 2020-07-16 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for two-step random access procedure
US20200359419A1 (en) * 2017-05-31 2020-11-12 Telefonaktiebolaget Lm Ericsson (Publ) Power Control of Random Access in NB-IoT
CN112040558A (zh) * 2020-08-07 2020-12-04 中国信息通信研究院 一种随机接入过程中的上行数据传输方法和设备

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107409421A (zh) * 2015-04-03 2017-11-28 夏普株式会社 无线通信系统、终端装置、基站装置、无线通信方法及集成电路
US20200359419A1 (en) * 2017-05-31 2020-11-12 Telefonaktiebolaget Lm Ericsson (Publ) Power Control of Random Access in NB-IoT
WO2020143549A1 (en) * 2019-01-07 2020-07-16 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for two-step random access procedure
CN112040558A (zh) * 2020-08-07 2020-12-04 中国信息通信研究院 一种随机接入过程中的上行数据传输方法和设备

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
QUALCOMM INCORPORATED: "RAN2 enhancements for Msg3 repetition", 3GPP DRAFT; R2-2107220, vol. RAN WG2, 6 August 2021 (2021-08-06), pages 1 - 3, XP052033966 *

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