WO2023102689A1 - 一种基于四步随机接入的第三条消息重复的覆盖增强方法 - Google Patents

一种基于四步随机接入的第三条消息重复的覆盖增强方法 Download PDF

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Publication number
WO2023102689A1
WO2023102689A1 PCT/CN2021/135765 CN2021135765W WO2023102689A1 WO 2023102689 A1 WO2023102689 A1 WO 2023102689A1 CN 2021135765 W CN2021135765 W CN 2021135765W WO 2023102689 A1 WO2023102689 A1 WO 2023102689A1
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Prior art keywords
transmissions
terminal device
message
msg3
repetition
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PCT/CN2021/135765
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English (en)
French (fr)
Inventor
江小威
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北京小米移动软件有限公司
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Application filed by 北京小米移动软件有限公司 filed Critical 北京小米移动软件有限公司
Priority to PCT/CN2021/135765 priority Critical patent/WO2023102689A1/zh
Priority to CN202180004410.1A priority patent/CN114287166B/zh
Publication of WO2023102689A1 publication Critical patent/WO2023102689A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present disclosure relates to the field of communication technologies, and in particular to a coverage enhancement method and device thereof based on four-step random access and repetition of the third message.
  • one of the bottlenecks of uplink coverage is the uplink shared physical channel (Physical Uplink Share CHannel, PUSCH) channel that sends the third message msg3 during the four-step 4step random access (Random Access, RA) process.
  • PUSCH Physical Uplink Share CHannel
  • RA Random Access
  • the coverage can be enhanced by repeating msg3.
  • Embodiments of the present disclosure provide a coverage enhancement method based on four-step random access and repetition of a third message and a device thereof, which can be applied in the field of communication technologies.
  • an embodiment of the present disclosure provides a coverage enhancement method and device for repeating the third message based on four-step random access, the method is executed by a terminal device, and the method includes: responding to the current preamble preamble The number of transmission times is greater than the transmission threshold, and the random access RA process meets the preset conditions, and the third message msg3 is opened to repeat the repetition mode.
  • the terminal device can enable the third message msg3repetition mode when the current number of preamble transmissions is greater than the transmission threshold and the RA process meets the preset conditions, so as to achieve the effect of coverage enhancement.
  • the current number of preamble transmissions is greater than the transmission threshold and is any of the following:
  • the number of preamble transmissions in the two-step 2 step RA process is greater than the maximum number of transmissions of message A MsgA;
  • the number of preamble transmissions in the two-step 2 step RA process is greater than the maximum number of rollback transmissions of message A MsgA;
  • the number of preamble transmissions in the 4 step 4 step RA process is greater than the maximum number of fallback transmissions of Msg1;
  • the number of preamble transmissions in the RA process is greater than the sum of the maximum number of transmissions of MsgA and the maximum number of transmissions of the first message Msg1.
  • Receive first indication information where the first indication information is used to indicate the value of the transmission threshold.
  • the receiving the first indication information includes:
  • the first indication information is received through a radio resource control RRC message.
  • the first indication information is further used to indicate a cell identity corresponding to the transmission threshold, or a bandwidth part BWP identity corresponding to the transmission threshold.
  • the preset conditions include at least one of the following:
  • the random access process is not completed
  • the current RA type is 2 step RA;
  • the current RA type is a 4 step RA that is not a 2 step RA fallback;
  • the current RA type is 4 step RA backed by 2 step RA;
  • the downlink path loss reference point reference signal received power RSRP is smaller than the receiving threshold.
  • the capability of whether the terminal device supports msg3 repetition includes at least one of the following:
  • the terminal device supports the capability of msg3 repetition when falling back from 2 step RA to 4 step RA;
  • the terminal device supports msg3 repetition capability in each frequency band.
  • the embodiment of the present disclosure provides another coverage enhancement method based on the repetition of the third message of four-step random access and its device.
  • the method is executed by a network device, and the method includes:
  • the terminal device In response to the fact that the number of preamble transmissions currently received by the terminal device is greater than the transmission threshold and the random access RA process satisfies a preset condition, it is determined that the terminal device has enabled the repetition mode of the third message msg3.
  • the network device may determine that the terminal device has enabled the third message msg3 repetition repetition mode when the number of preamble transmissions currently received by the terminal device is greater than the transmission threshold and the random access RA process meets the preset conditions , so that the network device can establish a connection with the terminal device based on the msg3 repeatedly sent by the terminal device, thereby achieving the effect of coverage enhancement.
  • the current number of preamble transmissions is greater than the transmission threshold and is any of the following:
  • the number of preamble transmissions in the two-step 2 step RA process is greater than the maximum number of transmissions of message A MsgA;
  • the number of preamble transmissions in the two-step 2 step RA process is greater than the maximum number of rollback transmissions of message A MsgA;
  • the number of preamble transmissions in the 4 step 4 step RA process is greater than the maximum number of fallback transmissions of Msg1;
  • the number of preamble transmissions in the RA process is greater than the sum of the maximum number of transmissions of MsgA and the maximum number of transmissions of the first message Msg1.
  • the sending the first indication information includes:
  • the first indication information is sent through a radio resource control RRC message.
  • the first indication information is further used to indicate a cell identity corresponding to the transmission threshold, or a bandwidth part BWP identity corresponding to the transmission threshold.
  • the preset conditions include at least one of the following:
  • the random access process is not completed
  • the current RA type is 2 step RA;
  • the current RA type is a 4 step RA that is not a 2 step RA fallback;
  • the current RA type is 4 step RA backed by 2 step RA;
  • whether the capability of the terminal device to support msg3 repetition includes at least one of the following:
  • the terminal device supports the capability of msg3 repetition when falling back from 2 step RA to 4 step RA;
  • the terminal device supports msg3 repetition capability in each frequency band.
  • the embodiment of the present disclosure provides a communication device, which has some or all functions of the terminal device in the method described in the first aspect above, for example, the functions of the communication device may have part or all of the functions in the present disclosure
  • the functions in the embodiments may also have the functions of independently implementing any one of the embodiments in the present disclosure.
  • the functions described above may be implemented by hardware, or may be implemented by executing corresponding software on the hardware.
  • the hardware or software includes one or more units or modules corresponding to the above functions.
  • the embodiment of the present disclosure provides another communication device, which has some or all functions of the network device in the method example described in the second aspect above, for example, the function of the communication device may have some of the functions in the present disclosure Or the functions in all the embodiments may also have the function of implementing any one embodiment in the present disclosure alone.
  • the functions described above may be implemented by hardware, or may be implemented by executing corresponding software on the hardware.
  • the hardware or software includes one or more units or modules corresponding to the above functions.
  • an embodiment of the present disclosure provides a communication device, where the communication device includes a processor, and when the processor invokes a computer program in a memory, executes the method described in the first aspect above.
  • an embodiment of the present disclosure provides a communication device, where the communication device includes a processor, and when the processor invokes a computer program in a memory, it executes the method described in the second aspect above.
  • an embodiment of the present disclosure provides a communication device, the communication device includes a processor and a memory, and a computer program is stored in the memory; when the computer program is executed by the processor, the communication device executes the above-mentioned The method described in the first aspect.
  • an embodiment of the present disclosure provides a communication device, the communication device includes a processor and a memory, and a computer program is stored in the memory; when the computer program is executed by the processor, the communication device executes the above-mentioned The method described in the second aspect.
  • an embodiment of the present disclosure provides a communication device, the device includes a processor and an interface circuit, the interface circuit is used to receive code instructions and transmit them to the processor, and the processor is used to run the code instructions to make the The device executes the method described in the first aspect above.
  • an embodiment of the present disclosure provides a communication device, the device includes a processor and an interface circuit, the interface circuit is used to receive code instructions and transmit them to the processor, and the processor is used to run the code instructions to make the The device executes the method described in the second aspect above.
  • an embodiment of the present disclosure provides a communication system, the system includes the communication device described in the third aspect and the communication device described in the fourth aspect, or the system includes the communication device described in the fifth aspect and The communication device described in the sixth aspect, or, the system includes the communication device described in the seventh aspect and the communication device described in the eighth aspect, or, the system includes the communication device described in the ninth aspect and the communication device described in the tenth aspect the communication device described above.
  • an embodiment of the present invention provides a computer-readable storage medium for storing instructions used by the above-mentioned terminal device, and when the instructions are executed, the method described in the above-mentioned first aspect is implemented.
  • an embodiment of the present invention provides a computer-readable storage medium for storing instructions used by the above-mentioned network device, and when the instructions are executed, the method described in the above-mentioned second aspect is implemented.
  • the present disclosure further provides a computer program product including a computer program, which, when run on a computer, causes the computer to execute the method described in the first aspect above.
  • the present disclosure further provides a computer program product including a computer program, which, when run on a computer, causes the computer to execute the method described in the second aspect above.
  • the present disclosure provides a chip system
  • the chip system includes at least one processor and an interface, used to support the terminal device to implement the functions involved in the first aspect, for example, determine or process the data involved in the above method and at least one of information.
  • the chip system further includes a memory, and the memory is configured to store necessary computer programs and data of the terminal device.
  • the system-on-a-chip may consist of chips, or may include chips and other discrete devices.
  • the present disclosure provides a chip system
  • the chip system includes at least one processor and an interface, used to support the network device to implement the functions involved in the second aspect, for example, determine or process the data involved in the above method and at least one of information.
  • the chip system further includes a memory, and the memory is used for saving necessary computer programs and data of the network device.
  • the system-on-a-chip may consist of chips, or may include chips and other discrete devices.
  • the present disclosure provides a computer program that, when run on a computer, causes the computer to execute the method described in the first aspect above.
  • the present disclosure provides a computer program that, when run on a computer, causes the computer to execute the method described in the second aspect above.
  • FIG. 1 is a schematic structural diagram of a communication system provided by an embodiment of the present disclosure
  • FIG. 2 is a schematic flowchart of a coverage enhancement method based on four-step random access and repetition of the third message provided by an embodiment of the present disclosure
  • FIG. 3 is a schematic flowchart of a coverage enhancement method based on repetition of a third message based on four-step random access provided by another embodiment of the present disclosure
  • FIG. 4 is a schematic flowchart of a coverage enhancement method based on four-step random access and repetition of the third message provided by another embodiment of the present disclosure
  • FIG. 5 is a schematic flowchart of a coverage enhancement method based on four-step random access and repetition of the third message provided by another embodiment of the present disclosure
  • FIG. 6 is a schematic flowchart of a coverage enhancement method based on repetition of a third message based on four-step random access provided by another embodiment of the present disclosure
  • FIG. 7 is a schematic flowchart of a coverage enhancement method based on repetition of a third message based on four-step random access provided by another embodiment of the present disclosure
  • FIG. 8 is a schematic flowchart of a coverage enhancement method based on repetition of a third message based on four-step random access provided by another embodiment of the present disclosure
  • FIG. 9 is a schematic flowchart of a coverage enhancement method based on repetition of a third message based on four-step random access provided by another embodiment of the present disclosure.
  • FIG. 10 is a schematic flowchart of a coverage enhancement method based on four-step random access and repetition of the third message provided by another embodiment of the present disclosure.
  • FIG. 11 is a schematic flowchart of a coverage enhancement method based on repetition of a third message based on four-step random access provided by another embodiment of the present disclosure
  • FIG. 12 is a schematic flowchart of a coverage enhancement method based on repetition of a third message based on four-step random access provided by another embodiment of the present disclosure
  • FIG. 13 is a schematic flowchart of a coverage enhancement method based on repetition of a third message based on four-step random access provided by another embodiment of the present disclosure
  • FIG. 14 is a schematic flowchart of a coverage enhancement method based on four-step random access and repetition of the third message provided by another embodiment of the present disclosure.
  • FIG. 15 is a schematic flowchart of a coverage enhancement method based on four-step random access and repetition of the third message provided by another embodiment of the present disclosure.
  • FIG. 16 is a schematic flowchart of a coverage enhancement method based on four-step random access and repetition of the third message provided by another embodiment of the present disclosure
  • FIG. 17 is a schematic flowchart of a coverage enhancement method based on four-step random access and repetition of the third message provided by another embodiment of the present disclosure.
  • FIG. 18 is a schematic structural diagram of a communication device according to an embodiment of the present disclosure.
  • Fig. 19 is a schematic structural diagram of a communication device according to another embodiment of the present disclosure.
  • FIG. 20 is a schematic structural diagram of a chip according to an embodiment of the present disclosure.
  • the random access process refers to the process from when the user sends a random access preamble to try to access the network to when a basic signaling connection is established with the network. Random access is a very critical step in a mobile communication system, and it is also the last step in establishing a communication link between a terminal device and a network. Terminal devices can exchange information with network devices through random access. Wherein, the random access process may include two-step random access and four-step random access.
  • the four-step 4 step random access process includes: the terminal device sends a random access preamble through the first message msg1; the network device sends a random access response message (Random Access Response, RAR) through the second message msg2; The terminal device sends a radio resource control (radio resource control, RRC) connection request through the third message msg3; the terminal device receives the RRC connection establishment through the fourth message msg4 (this process is also the contention resolution process)
  • RRC radio resource control
  • the two-step 2 step random access process includes: the terminal device sends an A message msgA to the network device, and the network device sends a B message msgB to the terminal device.
  • msgA includes content equivalent to msg1 and msg3 in the four-step random access
  • msgB includes content equivalent to msg2 and msg4 in the four-step random access.
  • Radio resource control also known as radio resource management or radio resource allocation
  • RRC radio resource control
  • radio resource management also known as radio resource management or radio resource allocation
  • FIG. 1 is a schematic structural diagram of a communication system provided by an embodiment of the present disclosure.
  • the communication system may include, but is not limited to, a network device and a terminal device.
  • the number and form of the devices shown in Figure 1 are for example only and do not constitute a limitation to the embodiments of the present disclosure. In practical applications, two or more network equipment, two or more terminal equipment.
  • the communication system shown in FIG. 1 may include a network device 11 and a terminal device 12 .
  • long term evolution long term evolution, LTE
  • 5th generation 5th generation
  • 5G new radio new radio, NR
  • other future new mobile communication systems etc.
  • the network device 11 in the embodiment of the present disclosure is an entity on the network side for transmitting or receiving signals.
  • the network device 11 may be an evolved base station (evolved NodeB, eNB), a transmission point (transmission reception point, TRP), a next generation base station (next generation NodeB, gNB) in an NR system, or a base station in other future mobile communication systems Or an access node in a wireless fidelity (wireless fidelity, WiFi) system, etc.
  • eNB evolved NodeB
  • TRP transmission reception point
  • gNB next generation base station
  • gNB next generation NodeB
  • the embodiments of the present disclosure do not limit the specific technology and specific device form adopted by the network device.
  • the network device provided by the embodiment of the present disclosure may be composed of a centralized unit (central unit, CU) and a distributed unit (distributed unit, DU), wherein the CU may also be called a control unit (control unit), and the CU-DU
  • the structure of the network device such as the protocol layer of the base station, can be separated, and the functions of some protocol layers are placed in the centralized control of the CU, and the remaining part or all of the functions of the protocol layer are distributed in the DU, and the CU centrally controls the DU.
  • the terminal device 12 in the embodiment of the present disclosure is an entity on the user side for receiving or transmitting signals, such as a mobile phone.
  • the terminal equipment may also be called terminal equipment (terminal), user equipment (user equipment, UE), mobile station (mobile station, MS), mobile terminal equipment (mobile terminal, MT) and so on.
  • the terminal device can be a car with communication functions, a smart car, a mobile phone, a wearable device, a tablet computer (Pad), a computer with a wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (augmented reality (AR) terminal equipment, wireless terminal equipment in industrial control (industrial control), wireless terminal equipment in self-driving (self-driving), wireless terminal equipment in remote medical surgery (remote medical surgery), smart grid ( Wireless terminal devices in smart grid, wireless terminal devices in transportation safety, wireless terminal devices in smart city, wireless terminal devices in smart home, etc.
  • the embodiments of the present disclosure do not limit the specific technology and specific device form adopted by the terminal device.
  • FIG. 2 is a schematic flowchart of a coverage enhancement method based on four-step random access and repetition of the third message provided by an embodiment of the present disclosure, and the method is executed by a terminal device. As shown in Figure 2, the method may include but not limited to the following steps:
  • Step 21 in response to the fact that the current number of preamble transmissions is greater than the transmission threshold and the random access RA process meets the preset conditions, enable the repetition mode of the third message msg3.
  • Msg3 repetition is enabled after 2-step RA fallback to 4-step RA
  • the terminal device judges whether to enable Msg3 repetition based on the condition that the number of preamble transmissions is greater than the maximum number of transmissions of Msg1 (msg1-TransMax) , it may cause the current 4-step RA to come back from 2-step RA fallback, and the value of the maximum number of transmissions (msgA-TransMax) of MsgA configured on the network device is less than the value of msg1-TransMax, the number of preamble transmissions is still
  • the condition greater than msg1-TransMax can be met, which leads to the start of Msg3 repetition when the 2-step RA fallback is not supported to the 4-step RA start of Msg3 repetition, resulting in an abnormal start of Msg3 repetition.
  • a method for starting the third message repetition mode of the four-step random access is provided, so that the abnormal start of the Msg3 repetition mode can be avoided while achieving coverage enhancement.
  • the current number of preamble transmissions is greater than the transmission threshold, which can be any of the following:
  • the number of preamble transmissions during the two-step 2 step random access RA process is greater than the maximum number of transmissions of message A MsgA (msgA-TransMax);
  • the number of preamble transmissions in the two-step 2 step RA process is greater than the maximum number of fallback transmissions (msgA-TransMax-CE) of message A MsgA;
  • the number of preamble transmissions in the 4 step 4 step RA process is greater than the maximum number of fallback transmissions of Msg1 (msg1-TransMax-fallback);
  • the number of preamble transmissions in the RA process is greater than the sum of the maximum number of transmissions of MsgA and the maximum number of transmissions of the first message Msg1.
  • the RA process may include 2 step RA and 4 step RA, that is, the total number of preamble transmissions in the 2 step RA and 4 step RA processes must be greater than the sum of the maximum number of transmissions of MsgA and the maximum number of transmissions of Msg1.
  • the preset conditions may include at least one of the following:
  • the random access process is not completed
  • the current RA type is 2 step RA;
  • the current RA type is a 4 step RA that is not a 2 step RA fallback;
  • the current RA type is 4 step RA backed by 2 step RA;
  • the reference signal receiving power (Reference Signal Receiving Power, RSRP) of the downlink path loss reference point is less than the receiving threshold.
  • the terminal device can enable the third message msg3 repetition mode when the current number of preamble transmissions is greater than the transmission threshold and the RA process meets the preset conditions, so as to achieve the effect of coverage enhancement.
  • Figure 3 takes Msg3 repetition mode enabled after 2-step RA is not supported to fallback to 4-step RA as an example.
  • the coverage enhancement method for repeating the third message based on four-step random access provided by this disclosure Be explained.
  • Fig. 3 is a schematic flowchart of a coverage enhancement method based on four-step random access and repetition of a third message provided by an embodiment of the present disclosure, and the method is executed by a terminal device. As shown in Figure 3, the method may include but not limited to the following steps:
  • Step 31 receiving first indication information, where the first indication information is used to indicate the value of the transmission threshold.
  • the value of the transmission threshold indicated by the first indication information may be the maximum transmission value of Msg1 frequency.
  • the terminal device may receive the first indication information through a broadcast message; or, the terminal device may also receive the first indication information through a radio resource control RRC message.
  • the broadcast message may be a SIB1 (System Information Block Type1) message, which is not limited in this disclosure.
  • SIB1 System Information Block Type1
  • the first indication information may also be used to indicate a cell identity corresponding to the transmission threshold. That is, only when the cell to be accessed by the terminal device is the cell indicated by the cell identifier, can it be determined whether to enable the msg3 repetition mode based on the transmission threshold.
  • a bandwidth part (BandWidth Part, BWP) identifier corresponding to the transmission threshold can it be determined whether to enable the msg3 repetition mode based on the transmission threshold.
  • Step 32 when the current number of preamble transmissions is greater than the transmission threshold, and the RA process satisfies that the random access process is not completed, the current RA type is 4 step RA with non-2 step RA fallback, and the downlink path loss reference point RSRP is less than the reception threshold In this case, enable the msg3 repetition mode.
  • the terminal device may further determine whether the downlink path loss reference point RSRP is less than the receiving threshold before enabling msg3 repetition, and enable the msg3 repetition mode when the downlink path loss reference point RSRP is less than the receiving threshold.
  • the receiving threshold may be an RSRP threshold (rsrp-Threshold-msg3 repetition) of msg3 repetition, which is not limited in this disclosure.
  • the terminal device can first determine whether the msg3 repetition mode has been enabled, and then further determine whether the current RA type is non-2 step RA if the msg3 repetition mode is not enabled
  • the fallback 4 step RA the downlink path loss reference point RSRP is less than the receiving threshold, and the current number of preamble transmissions is greater than msg1-TransMax and other preset conditions.
  • resources of the terminal device can be saved.
  • the terminal device receives the value of the transmission threshold indicated by the network device, the current number of preamble transmissions is greater than the transmission threshold, and the random access process is not completed, and the current RA type is non-2 step RA
  • the fallback 4 step RA and the downlink path loss reference point RSRP are less than the receiving threshold, the msg3 repetition mode is enabled to achieve the effect of coverage enhancement.
  • Figure 4 takes Msg3 repetition mode enabled after 2-step RA fallback is not supported to 4-step RA as an example.
  • the coverage enhancement method for repeating the third message based on four-step random access provided by this disclosure Be explained.
  • Fig. 4 is a schematic flowchart of a coverage enhancement method based on four-step random access and repetition of a third message provided by an embodiment of the present disclosure, and the method is executed by a terminal device. As shown in Figure 4, the method may include but not limited to the following steps:
  • Step 41 receiving first indication information, where the first indication information is used to indicate the value of the transmission threshold.
  • the value of the transmission threshold indicated by the first indication information may be the maximum transmission value of Msg1 frequency.
  • step 41 for the specific implementation form of step 41, reference may be made to the detailed steps in other embodiments in the present disclosure, which will not be described in detail here.
  • Step 42 when the current number of preamble transmissions is greater than the transmission threshold, and the RA process satisfies that the random access process is not completed, the current RA type is 4 step RA with non-2 step RA fallback, the downlink path loss reference point RSRP is less than the reception threshold, and When contention resolution fails, enable msg3 repetition mode.
  • the terminal device after the contention resolution fails, if the terminal device judges that the RA process is not completed, and the current 4-step RA is not returned by 2-step RA fallback, and the number of preamble transmissions is greater than the first indication information
  • the terminal device may further simultaneously determine whether the downlink path loss reference point RSRP is less than the receiving threshold before enabling msg3 repetition, and enable the msg3 repetition mode when the downlink path loss reference point RSRP is less than the receiving threshold.
  • the receiving threshold may be an RSRP threshold (rsrp-Threshold-msg3 repetition) of msg3 repetition, which is not limited in this disclosure.
  • the terminal device can first determine whether the msg3 repetition mode has been enabled, and then further determine whether the current RA type is non-2 step if the msg3 repetition mode is not enabled 4 step RA for RA fallback, the downlink path loss reference point RSRP is less than the receiving threshold, contention resolution fails, and the current number of preamble transmissions is greater than msg1-TransMax and other preset conditions.
  • resources of the terminal device can be saved.
  • the terminal device receives the value of the transmission threshold indicated by the network device, the current number of preamble transmissions is greater than the transmission threshold, and the random access process is not completed, and the current RA type is non-2 step RA
  • the current RA type is non-2 step RA
  • the msg3 repetition mode is enabled to achieve the effect of coverage enhancement.
  • Fig. 5 takes support for 2-step RA fallback to 4-step RA and then turns on the Msg3 repetition mode as an example, and implements the coverage enhancement method based on the third message repetition based on four-step random access provided by this disclosure.
  • Fig. 5 is a schematic flowchart of a coverage enhancement method based on four-step random access and repetition of a third message provided by an embodiment of the present disclosure, and the method is executed by a terminal device. As shown in Figure 5, the method may include but not limited to the following steps:
  • Step 51 receiving first indication information, where the first indication information is used to indicate the value of the transmission threshold.
  • the value of the transmission threshold indicated by the first indication information may be the maximum number of transmissions of MsgA The sum of the maximum number of transmissions and Msg1.
  • step 51 for the specific implementation form of step 51, reference may be made to the detailed steps in other embodiments in the present disclosure, and no detailed description is given here.
  • Step 52 when the current number of preamble transmissions is greater than the transmission threshold, and the RA process satisfies that the random access process is not completed, the current RA type is 4 step RA with non-2 step RA fallback, the downlink path loss reference point RSRP is less than the reception threshold, and When contention resolution fails, enable msg3 repetition mode.
  • the terminal device may further determine whether the downlink path loss reference point RSRP is less than the receiving threshold before enabling msg3 repetition, and enable the msg3 repetition mode when the downlink path loss reference point RSRP is less than the receiving threshold.
  • the receiving threshold may be an RSRP threshold (rsrp-Threshold-msg3 repetition) of msg3 repetition, which is not limited in this disclosure.
  • the terminal device can first determine whether the msg3 repetition mode has been enabled, and then further determine whether the current RA type is non-2 step if the msg3 repetition mode is not enabled.
  • resources of the terminal device can be saved.
  • the terminal device receives the value of the transmission threshold indicated by the network device, the current number of preamble transmissions is greater than the transmission threshold, and the random access process is not completed, and the current RA type is non-2 step RA
  • the current RA type is non-2 step RA
  • the msg3 repetition mode is enabled to achieve the effect of coverage enhancement.
  • Figure 6 takes support for 2-step RA to fallback to 4-step RA and then turns on the Msg3 repetition mode as an example.
  • the coverage enhancement method based on the third message repetition based on four-step random access provided by this disclosure is carried out.
  • Fig. 6 is a schematic flowchart of a coverage enhancement method based on four-step random access and repetition of the third message provided by an embodiment of the present disclosure, and the method is executed by a terminal device. As shown in Figure 6, the method may include but not limited to the following steps:
  • Step 61 Receive first indication information, where the first indication information is used to indicate the value of the transmission threshold.
  • the value of the transmission threshold indicated by the first indication information may be the maximum number of fallback transmissions of Msg1 (msg1-TransMax-fallback).
  • step 61 for the specific implementation form of step 61, reference may be made to the detailed steps in other embodiments in the present disclosure, which will not be described in detail here.
  • Step 62 when the current number of preamble transmissions is greater than the transmission threshold, and the RA process satisfies that the random access process is not completed, the current RA type is 4 step RA with non-2 step RA fallback, the downlink path loss reference point RSRP is less than the reception threshold, and When contention resolution fails, enable msg3 repetition mode.
  • the terminal device may further determine whether the downlink path loss reference point RSRP is less than the receiving threshold before enabling msg3 repetition, and enable the msg3 repetition mode when the downlink path loss reference point RSRP is less than the receiving threshold.
  • the receiving threshold may be an RSRP threshold (rsrp-Threshold-msg3 repetition) of msg3 repetition, which is not limited in this disclosure.
  • the terminal device can first determine whether the msg3 repetition mode has been enabled, and then further determine whether the current RA type is non-2 step if the msg3 repetition mode is not enabled.
  • resources of the terminal device can be saved.
  • the terminal device receives the value of the transmission threshold indicated by the network device, the current number of preamble transmissions is greater than the transmission threshold, and the random access process is not completed, and the current RA type is non-2 step RA
  • the current RA type is non-2 step RA
  • downlink path loss reference point RSRP is less than the receiving threshold, and contention resolution, the msg3 repetition mode is enabled to achieve the effect of coverage enhancement.
  • Figure 7 takes support for 2-step RA fallback to 4-step RA to enable the Msg3 repetition mode as an example, and implements the coverage enhancement method for repeating the third message based on four-step random access provided by this disclosure.
  • Fig. 7 is a schematic flowchart of a coverage enhancement method based on four-step random access and repetition of a third message provided by an embodiment of the present disclosure, and the method is executed by a terminal device. As shown in Figure 7, the method may include but not limited to the following steps:
  • Step 71 Receive first indication information, where the first indication information is used to indicate the value of the transmission threshold.
  • the value of the transmission threshold indicated by the first indication information may be the maximum number of transmissions of MsgA and Msg1 The sum of the maximum number of transfers.
  • step 71 for the specific implementation form of step 71, reference may be made to the detailed steps in other embodiments of the present disclosure, and no detailed description is given here.
  • Step 72 when the current number of preamble transmissions is greater than the transmission threshold, and the RA process satisfies that the random access process is not completed, the current RA type is 4 step RA with non-2 step RA fallback, the downlink path loss reference point RSRP is less than the reception threshold, and In the case of contention resolution, enable msg3 repetition mode.
  • the terminal device may further determine whether the downlink path loss reference point RSRP is less than the receiving threshold before enabling msg3 repetition, and enable the msg3 repetition mode when the downlink path loss reference point RSRP is less than the receiving threshold.
  • the receiving threshold may be an RSRP threshold (rsrp-Threshold-msg3 repetition) of msg3 repetition, which is not limited in this disclosure.
  • the terminal device can first determine whether the msg3 repetition mode has been enabled, and then further determine whether the current RA type is non-2 step if the msg3 repetition mode is not enabled Preset conditions such as the 4 step RA of RA fallback, the downlink path loss reference point RSRP is less than the receiving threshold, and the current number of preamble transmissions is greater than the sum of msgA-TransMax and msg1-TransMax. Thus, resources of the terminal device can be saved.
  • the terminal device receives the value of the transmission threshold indicated by the network device, the current number of preamble transmissions is greater than the transmission threshold, and the random access process is not completed, and the current RA type is non-2 step RA
  • the fallback 4 step RA the downlink path loss reference point RSRP is less than the receiving threshold, and the contention resolution fails, the msg3 repetition mode is enabled to achieve the effect of coverage enhancement.
  • FIG. 8 is a schematic flowchart of a coverage enhancement method based on four-step random access and repetition of a third message provided by an embodiment of the present disclosure, and the method is executed by a terminal device. As shown in Figure 8, the method may include but not limited to the following steps:
  • Step 81 Receive first indication information, where the first indication information is used to indicate the value of the transmission threshold.
  • the value of the transmission threshold indicated by the first indication information may be the maximum number of fallback transmissions of Msg1 (msg1-TransMax-fallback ).
  • step 81 for the specific implementation form of step 81, reference may be made to the detailed steps in other embodiments in the present disclosure, which will not be described in detail here.
  • Step 82 when the current number of preamble transmissions is greater than the transmission threshold, and the RA process satisfies that the random access process is not completed, the current RA type is 2 step RA, and the downlink path loss reference point RSRP is less than the reception threshold, start the msg3 repetition mode.
  • the terminal device can further determine whether the downlink path loss reference point RSRP is less than the receiving threshold, and enable the msg3 repetition mode when the downlink path loss reference point RSRP is less than the receiving threshold.
  • the receiving threshold may be an RSRP threshold (rsrp-Threshold-msg3 repetition) of msg3 repetition, which is not limited in this disclosure.
  • the terminal device can first determine whether the msg3 repetition mode has been enabled, and then further determine whether the current RA type is 2 step RA, downlink The loss reference point RSRP is less than the receiving threshold, and the current number of preamble transmissions is greater than msgA-TransMax-CE and other preset conditions. Thus, resources of the terminal device can be saved.
  • the terminal device receives the value of the transmission threshold indicated by the network device, the current number of preamble transmissions is greater than the transmission threshold, and the current RA type is 2 step RA when the random access process is not completed.
  • the msg3 repetition mode is turned on, so as to achieve the effect of coverage enhancement.
  • FIG. 9 is a schematic flowchart of a coverage enhancement method based on four-step random access and repetition of the third message provided by an embodiment of the present disclosure, and the method is executed by a terminal device. As shown in Figure 9, the method may include but not limited to the following steps:
  • Step 91 sending second indication information, where the second indication information is used to indicate whether the terminal device supports msg3 repetition capability.
  • the capability of whether the terminal device supports msg3 repetition may include at least one of the following:
  • the terminal device supports the capability of msg3 repetition when falling back from 2 step RA to 4 step RA;
  • the terminal device supports msg3 repetition capability in each frequency band.
  • the terminal device may report to the network device whether the terminal device supports the msg3 repetition capability in all frequency bands through the second indication information.
  • the second indication information may also be used to report to the network device whether the msg3 repetition capability is supported in each frequency band. That is, the second indication information may include the identification of each frequency band and whether each frequency band supports msg3 repetition capability, which is not limited in the present disclosure.
  • the terminal device may indicate whether the terminal device supports the msg3 repetition capability in the frequency range 1 (frequency range, FR1) frequency band and the frequency range 2 (frequency range, FR2) frequency band through a piece of second indication information, or, respectively, through
  • the different second indication information indicates whether the FR1 frequency band, FR2-1 frequency band, and FR2-2 frequency band support msg3 repetition capability.
  • the present disclosure does not limit this.
  • the FR1 frequency band is 410MHz-7125MHz; the FR2 frequency band can be 24250MHz-52600MHz, or the FR2 frequency band can also be 24250MHz-71000MHz. If the FR2 frequency band is 24250MHz–71000MHz, the FR2 frequency band can be divided into FR2-1 frequency band and FR2-2 frequency band, among which, FR2-1 frequency band is 24250MHz–52600MHz; FR2-2 frequency band is 52600MHz-71000MHz.
  • Step 92 Receive first indication information, where the first indication information is used to indicate the value of the transmission threshold.
  • Step 93 in response to the current number of preamble transmissions being greater than the transmission threshold and the RA process meeting the preset conditions, start the msg3 repetition mode.
  • step 92 and step 93 reference may be made to the detailed steps in other embodiments of the present disclosure, and will not be described in detail here.
  • the terminal device first sends to the network device whether it supports msg3 repetition capability, and then the network device can indicate the transmission threshold to the terminal device when the terminal device supports msg3 repetition, thereby saving Resources of network equipment, and channel resources.
  • FIG. 10 is a schematic flowchart of a coverage enhancement method based on repetition of the third message based on four-step random access provided by an embodiment of the present disclosure, and the method is executed by a network device. As shown in Figure 10, the method may include but not limited to the following steps:
  • Step 101 in response to the fact that the number of preamble transmissions currently received by the terminal device is greater than the transmission threshold and the RA process satisfies a preset condition, it is determined that the terminal device has enabled the repetition mode of the third message msg3.
  • the current number of preamble transmissions is greater than the transmission threshold, which can be any of the following:
  • the number of preamble transmissions during the two-step 2 step random access RA process is greater than the maximum number of transmissions of message A MsgA (msgA-TransMax);
  • the number of preamble transmissions in the two-step 2 step RA process is greater than the maximum number of fallback transmissions (msgA-TransMax-CE) of message A MsgA;
  • the number of preamble transmissions in the 4 step 4 step RA process is greater than the maximum number of transmissions (msg1-TransMax) of the first message Msg1;
  • the number of preamble transmissions in the 4 step 4 step RA process is greater than the maximum number of fallback transmissions of Msg1 (msg1-TransMax-fallback);
  • the number of preamble transmissions in the RA process is greater than the sum of the maximum number of transmissions of MsgA and the maximum number of transmissions of the first message Msg1.
  • the RA process may include 2 step RA and 4 step RA, that is, the total number of preamble transmissions in the 2 step RA and 4 step RA processes must be greater than the sum of the maximum number of transmissions of MsgA and the maximum number of transmissions of Msg1.
  • the preset conditions may include at least one of the following:
  • the random access process is not completed
  • the current RA type is 2 step RA;
  • the current RA type is a 4 step RA that is not a 2 step RA fallback;
  • the current RA type is 4 step RA backed by 2 step RA;
  • the reference signal receiving power (Reference Signal Receiving Power, RSRP) of the downlink path loss reference point is less than the receiving threshold.
  • the network device can determine that the terminal device has enabled the repetition mode of the third message msg3 when the number of preamble transmissions currently received by the terminal device is greater than the transmission threshold and the RA process meets the preset conditions, thereby The network device can establish a connection with the terminal device based on the msg3 repeatedly sent by the terminal device, thereby achieving the effect of coverage enhancement.
  • Figure 11 takes Msg3 repetition mode enabled after 2-step RA is not supported to fallback to 4-step RA as an example.
  • the coverage enhancement method for repeating the third message based on four-step random access provided by this disclosure Be explained.
  • Fig. 11 is a schematic flowchart of a coverage enhancement method based on four-step random access and repetition of a third message provided by an embodiment of the present disclosure, and the method is executed by a network device. As shown in Figure 11, the method may include but not limited to the following steps:
  • Step 111 sending first indication information, where the first indication information is used to indicate the value of the transmission threshold.
  • the value of the transmission threshold indicated by the first indication information sent by the network device may be The maximum transmission times of Msg1.
  • the network device may receive the first indication information through a broadcast message; or, the network device may also receive the first indication information through a radio resource control RRC message.
  • the broadcast message may be a SIB1 (System Information Block Type1) message, which is not limited in this disclosure.
  • SIB1 System Information Block Type1
  • the first indication information may also be used to indicate a cell identity corresponding to the transmission threshold. That is, only when the cell to be accessed by the terminal device is the cell indicated by the cell identifier, can it be determined whether to enable the msg3 repetition mode based on the transmission threshold.
  • a bandwidth part (BandWidth Part, BWP) identifier corresponding to the transmission threshold. That is, only when the bandwidth part to be used by the terminal device is the bandwidth part indicated by the bandwidth part identifier, it can be determined whether to enable the msg3 repetition mode based on the transmission threshold.
  • Step 112 the number of preamble transmissions sent by the currently received terminal device is greater than the transmission threshold, and the RA process satisfies that the random access process is not completed, the current RA type is 4 step RA with non-2 step RA fallback, and the downlink path loss reference point When the RSRP is less than the receiving threshold, it is determined that the terminal device has enabled the msg3 repetition mode.
  • the network device sends the RAR to the terminal device, it is determined that the RA process is not completed, and the current 4-step RA is not returned by 2-step RA fallback, and the number of preamble transmissions is greater than the first indication information
  • the receiving threshold may be an RSRP threshold (rsrp-Threshold-msg3 repetition) of msg3 repetition, which is not limited in this disclosure.
  • the network device determines that the 4-step RA process is not completed, it can first determine whether the terminal device has enabled the msg3 repetition mode, and then further determine whether the current RA type is satisfied when the terminal device has not enabled the msg3 repetition mode.
  • the resources of the network device can be saved.
  • the network device first sends the first indication information for indicating the value of the transmission threshold to the terminal device, and then the number of preamble transmissions sent by the currently received terminal device is greater than the transmission threshold and satisfies random access If the process is not completed, the current RA type is 4 step RA with non-2 step RA fallback, and the downlink path loss reference point RSRP is less than the receiving threshold, it is determined that the terminal device has enabled the msg3 repetition mode, so that the network device can repeat based on the terminal device The sent msg3 establishes a connection with the terminal device, thereby achieving the effect of coverage enhancement.
  • Figure 12 takes Msg3 repetition mode enabled after 2-step RA is not supported to fallback to 4-step RA as an example.
  • the coverage enhancement method for the third message repetition based on four-step random access provided by this disclosure Be explained.
  • Fig. 12 is a schematic flowchart of a coverage enhancement method based on four-step random access and repetition of a third message provided by an embodiment of the present disclosure, and the method is executed by a network device. As shown in Figure 12, the method may include but not limited to the following steps:
  • Step 121 sending first indication information, where the first indication information is used to indicate the value of the transmission threshold.
  • the value of the transmission threshold indicated by the first indication information may be the maximum transmission value of Msg1 frequency.
  • step 121 for the specific implementation form of step 121, reference may be made to the detailed steps in other embodiments in the present disclosure, which will not be described in detail here.
  • Step 122 the number of preamble transmissions sent by the currently received terminal device is greater than the transmission threshold, and the RA process satisfies that the random access process is not completed, the current RA type is 4 step RA with non-2 step RA fallback, and the downlink path loss reference point RSRP If it is less than the receiving threshold and the contention resolution fails, it is determined that the terminal device has enabled the msg3 repetition mode.
  • the network device can determine that the terminal device has enabled the msg3 repetition mode.
  • the network device determines that the 4-step RA process is not completed, it can first determine whether the terminal device has enabled the msg3 repetition mode, and then further determine whether the current RA type is satisfied when the terminal device has not enabled the msg3 repetition mode.
  • the resources of the network device can be saved.
  • the network device first sends the first indication information for indicating the value of the transmission threshold to the terminal device, and then the number of preamble transmissions sent by the currently received terminal device is greater than the transmission threshold and satisfies random access If the process is not completed, the current RA type is 4 step RA other than 2 step RA fallback, the downlink path loss reference point RSRP is less than the receiving threshold, and the contention resolution fails, it is determined that the terminal device has enabled the msg3 repetition mode, so that the network device can Based on the msg3 repeatedly sent by the terminal device, a connection is established with the terminal device, thereby achieving the effect of coverage enhancement.
  • Fig. 13 is an example of enabling the Msg3 repetition mode after the 2-step RA fallback to 4-step RA, and the coverage enhancement method based on the third message repetition based on the four-step random access provided by the present disclosure is carried out.
  • Fig. 13 is a schematic flowchart of a coverage enhancement method based on four-step random access and repetition of a third message provided by an embodiment of the present disclosure, and the method is executed by a network device. As shown in Figure 13, the method may include but not limited to the following steps:
  • Step 131 sending first indication information, where the first indication information is used to indicate the value of the transmission threshold.
  • the value of the transmission threshold indicated by the first indication information may be the maximum number of transmissions of MsgA The sum of the maximum number of transmissions and Msg1.
  • step 131 for the specific implementation form of step 131, reference may be made to the detailed steps in other embodiments of the present disclosure, which will not be described in detail here.
  • Step 132 the number of preamble transmissions sent by the currently received terminal device is greater than the transmission threshold, and the RA process satisfies that the random access process is not completed, the current RA type is 4 step RA with non-2 step RA fallback, and the downlink path loss reference point RSRP If it is less than the receiving threshold and the contention resolution fails, it is determined that the terminal device has enabled the msg3 repetition mode.
  • the network device after the network device sends the RAR stage, or after the contention resolution fails, it determines that the RA process is not completed, and the current RA type is 4 step RA, and the current 4-step RA is a 2-step RA
  • the network device can first determine whether the terminal device has enabled the msg3 repetition mode, and then further determine whether the current RA type is satisfied when the terminal device has not enabled the msg3 repetition mode Preset conditions such as 4 step RA falling back to non-2 step RA, downlink path loss reference point RSRP is less than the receiving threshold, and the current number of preamble transmissions is greater than the sum of msg1-TransMax and msgA-TransMax.
  • Preset conditions such as 4 step RA falling back to non-2 step RA, downlink path loss reference point RSRP is less than the receiving threshold, and the current number of preamble transmissions is greater than the sum of msg1-TransMax and msgA-TransMax.
  • the resources of the network device can be saved.
  • the network device first sends the first indication information for indicating the value of the transmission threshold to the terminal device, and then the number of preamble transmissions sent by the currently received terminal device is greater than the transmission threshold and satisfies random access If the process is not completed, the current RA type is 4 step RA other than 2 step RA fallback, the downlink path loss reference point RSRP is less than the receiving threshold, and the contention resolution fails, it is determined that the terminal device has enabled the msg3 repetition mode, so that the network device can Based on the msg3 repeatedly sent by the terminal device, a connection is established with the terminal device, thereby achieving the effect of coverage enhancement.
  • Fig. 14 is an example of enabling the Msg3 repetition mode after supporting 2-step RA fallback to 4-step RA, and performing the coverage enhancement method based on the third message repetition based on four-step random access provided by this disclosure illustrate.
  • Fig. 14 is a schematic flowchart of a coverage enhancement method based on four-step random access and repetition of the third message provided by an embodiment of the present disclosure, and the method is executed by a network device. As shown in Figure 14, the method may include but not limited to the following steps:
  • Step 141 Send first indication information, where the first indication information is used to indicate the value of the transmission threshold.
  • the value of the transmission threshold indicated by the first indication information may be the maximum number of fallback transmissions of Msg1 (msg1-TransMax-fallback).
  • step 141 for the specific implementation form of step 141, reference may be made to the detailed steps in other embodiments in the present disclosure, which will not be described in detail here.
  • Step 142 the number of preamble transmissions sent by the currently received terminal device is greater than the transmission threshold, and the RA process satisfies that the random access process is not completed, the current RA type is 4 step RA with non-2 step RA fallback, and the downlink path loss reference point RSRP If it is less than the receiving threshold and the contention resolution fails, it is determined that the terminal device has enabled the msg3 repetition mode.
  • the network device after the network device sends the RAR stage, or after the contention resolution fails, it determines that the RA process is not completed, and the current RA type is 4 step RA, and the current 4-step RA is a 2-step RA
  • the network device can first determine whether the msg3 repetition mode has been enabled, and then further determine whether the current RA type is non-2 step if the msg3 repetition mode is not enabled.
  • the resources of the network device can be saved.
  • the network device first sends the first indication information for indicating the value of the transmission threshold to the terminal device, and then the number of preamble transmissions sent by the currently received terminal device is greater than the transmission threshold and satisfies random access If the process is not completed, the current RA type is 4 step RA other than 2 step RA fallback, the downlink path loss reference point RSRP is less than the receiving threshold, and the contention resolution fails, it is determined that the terminal device has enabled the msg3 repetition mode, so that the network device can Based on the msg3 repeatedly sent by the terminal device, a connection is established with the terminal device, thereby achieving the effect of coverage enhancement.
  • Figure 15 is an example of enabling the Msg3 repetition mode after supporting 2-step RA fallback to 4-step RA, and performing the coverage enhancement method based on the third message repetition based on four-step random access provided by this disclosure.
  • Fig. 15 is a schematic flowchart of a coverage enhancement method based on four-step random access and repetition of a third message provided by an embodiment of the present disclosure, and the method is executed by a network device. As shown in Figure 15, the method may include but not limited to the following steps:
  • Step 151 Send first indication information, where the first indication information is used to indicate the value of the transmission threshold.
  • the value of the transmission threshold indicated by the first indication information may be the maximum number of transmissions of MsgA and Msg1 The sum of the maximum number of transfers.
  • step 151 for the specific implementation form of step 151, reference may be made to the detailed steps in other embodiments of the present disclosure, which will not be described in detail here.
  • the network device can first determine whether the msg3 repetition mode has been enabled, and then further determine whether the current RA type is non-2 step if the msg3 repetition mode is not enabled Preset conditions such as the 4 step RA of RA fallback, the downlink path loss reference point RSRP is less than the receiving threshold, and the current number of preamble transmissions is greater than the sum of msgA-TransMax and msg1-TransMax. Thus, the resources of the network device can be saved.
  • the network device first sends the first indication information for indicating the value of the transmission threshold to the terminal device, and then the number of preamble transmissions sent by the currently received terminal device is greater than the transmission threshold and satisfies random access If the process is not completed, the current RA type is 4 step RA other than 2 step RA fallback, the downlink path loss reference point RSRP is less than the receiving threshold, and the contention resolution fails, it is determined that the terminal device has enabled the msg3 repetition mode, so that the network device can Based on the msg3 repeatedly sent by the terminal device, a connection is established with the terminal device, thereby achieving the effect of coverage enhancement.
  • FIG. 16 takes the Msg3 repetition mode enabled during 2-step RA as an example to illustrate the coverage enhancement method based on the repetition of the third message provided by the present disclosure based on four-step random access.
  • Fig. 16 is a schematic flowchart of a coverage enhancement method based on four-step random access and repetition of the third message provided by an embodiment of the present disclosure, and the method is executed by a network device. As shown in Figure 16, the method may include but not limited to the following steps:
  • Step 161 Send first indication information, where the first indication information is used to indicate the value of the transmission threshold.
  • the value of the transmission threshold indicated by the first indication information may be the maximum number of fallback transmissions of Msg1 (msg1-TransMax-fallback ).
  • step 161 for the specific implementation form of step 161, reference may be made to the detailed steps in other embodiments of the present disclosure, which will not be described in detail here.
  • Step 162 when the number of preamble transmissions sent by the currently received terminal device is greater than the transmission threshold, and the RA process satisfies that the random access process is not completed, the current RA type is 2 step RA, and the downlink path loss reference point RSRP is less than the reception threshold, Make sure the terminal device has enabled the msg3 repetition mode.
  • the network device can first determine whether the msg3 repetition mode has been enabled, and then further determine whether the current RA type is 2 step RA, downlink The loss reference point RSRP is less than the receiving threshold, and the current number of preamble transmissions is greater than msgA-TransMax-CE and other preset conditions.
  • the resources of the network device can be saved.
  • the network device first sends the first indication information for indicating the value of the transmission threshold to the terminal device, and then the number of preamble transmissions sent by the currently received terminal device is greater than the transmission threshold and satisfies random access If the process is not completed, the current RA type is 2 step RA, and the downlink path loss reference point RSRP is less than the receiving threshold, it is determined that the terminal device has enabled the msg3 repetition mode, so that the network device can establish a connection with the terminal device based on the msg3 repeatedly sent by the terminal device connection, thereby achieving the effect of coverage enhancement.
  • FIG. 17 is a schematic flowchart of a coverage enhancement method based on repetition of the third message based on four-step random access provided by an embodiment of the present disclosure, and the method is executed by a network device. As shown in Figure 17, the method may include but not limited to the following steps:
  • Step 171 receiving second indication information, wherein the second indication information is used to indicate whether the terminal device supports msg3 repetition capability.
  • the capability of whether the terminal device supports msg3 repetition may include at least one of the following:
  • the terminal device supports the capability of msg3 repetition when falling back from 2 step RA to 4 step RA;
  • the terminal device supports msg3 repetition capability in each frequency band.
  • the second indication information is sent by the terminal device to the network device.
  • the terminal device can report to the network device whether the terminal device supports msg3 repetition capability in all frequency bands through the second indication information.
  • the second indication information may also be used to report to the network device whether the msg3 repetition capability is supported in each frequency band. That is, the second indication information may include the identification of each frequency band and whether each frequency band supports msg3 repetition capability, which is not limited in the present disclosure.
  • the terminal device may indicate whether the terminal device supports the msg3 repetition capability in the frequency range 1 (frequency range, FR1) frequency band and the frequency range 2 (frequency range, FR2) frequency band through a piece of second indication information, or, respectively, through
  • the different second indication information indicates whether the FR1 frequency band, FR2-1 frequency band, and FR2-2 frequency band support msg3 repetition capability.
  • the present disclosure does not limit this.
  • the FR1 frequency band is 410MHz-7125MHz; the FR2 frequency band can be 24250MHz-52600MHz, or the FR2 frequency band can also be 24250MHz-71000MHz. If the FR2 frequency band is 24250MHz–71000MHz, the FR2 frequency band can be divided into FR2-1 frequency band and FR2-2 frequency band, among which, FR2-1 frequency band is 24250MHz–52600MHz; FR2-2 frequency band is 52600MHz-71000MHz.
  • Step 172 Send first indication information, where the first indication information is used to indicate the value of the transmission threshold.
  • Step 173 in response to the number of preamble transmissions currently received by the terminal device being greater than the transmission threshold and the RA process meeting the preset conditions, it is determined that the terminal device has started the msg3 repetition mode.
  • step 172 and step 173 reference may be made to the detailed steps in other embodiments of the present disclosure, and no detailed description is given here.
  • the network device first receives the capability of whether the terminal device supports msg3 repetition sent by the terminal device, and then the network device can indicate the transmission threshold to the terminal device when the terminal device supports msg3 repetition, thereby The resources of network equipment and channel resources are saved.
  • the network device first receives the second indication information sent by the terminal device to indicate whether the terminal device supports the capability of msg3 repetition, and then can send the first indication information to the The value of the transmission threshold indicated by the terminal device. Finally, when the number of preamble transmissions currently received is greater than the transmission threshold and the RA process meets the preset conditions, it is determined that the terminal device has turned on the msg3 repetition mode.
  • the terminal device supports msg3 repetition, the number of preamble transmissions currently received is greater than the transmission threshold, and the preset conditions of the RA process, it is determined that the terminal device has enabled the msg3 repetition mode, so that the network device can repeatedly send msg3 based on the terminal device , to establish a connection with the terminal equipment, which not only achieves the effect of coverage enhancement, but also saves resources.
  • the methods provided in the embodiments of the present disclosure are introduced from the perspectives of network devices and terminal devices respectively.
  • the network device and the terminal device may include a hardware structure and a software module, and implement the above functions in the form of a hardware structure, a software module, or a hardware structure plus a software module.
  • a certain function among the above-mentioned functions may be implemented in the form of a hardware structure, a software module, or a hardware structure plus a software module.
  • FIG. 18 is a schematic structural diagram of a communication device 180 provided by an embodiment of the present disclosure.
  • the communication device 180 shown in FIG. 18 may include a processing module 1801 and a transceiver module 1802 .
  • the transceiver module 1802 may include a sending module and/or a receiving module, the sending module is used to implement a sending function, the receiving module is used to implement a receiving function, and the transceiver module 1802 may implement a sending function and/or a receiving function.
  • the communication device 180 may be a terminal device, may also be a device in the terminal device, and may also be a device that can be matched and used with the terminal device.
  • the communication device 180 on the side of the terminal device, the device includes:
  • the processing module 1801 is configured to enable the repetition mode of the third message msg3 in response to the fact that the current number of preamble transmissions is greater than the transmission threshold and the random access RA process meets the preset conditions.
  • the current number of preamble transmissions is greater than the transmission threshold and is any of the following:
  • the number of preamble transmissions in the two-step 2 step RA process is greater than the maximum number of transmissions of message A MsgA;
  • the number of preamble transmissions in the two-step 2 step RA process is greater than the maximum number of rollback transmissions of message A MsgA;
  • the number of preamble transmissions in the 4 step 4 step RA process is greater than the maximum number of fallback transmissions of Msg1;
  • the number of preamble transmissions in the RA process is greater than the sum of the maximum number of transmissions of MsgA and the maximum number of transmissions of the first message Msg1.
  • the transceiving module 1802 is configured to receive first indication information, where the first indication information is used to indicate the value of the transmission threshold.
  • the transceiver module 1802 is specifically used for:
  • the first indication information is received through a radio resource control RRC message.
  • the first indication information is also used to indicate a cell identity corresponding to the transmission threshold, or a bandwidth part BWP identity corresponding to the transmission threshold.
  • the preset conditions include at least one of the following:
  • the random access process is not completed
  • the current RA type is 2 step RA;
  • the current RA type is a 4 step RA that is not a 2 step RA fallback;
  • the current RA type is 4 step RA backed by 2 step RA;
  • the downlink path loss reference point reference signal received power RSRP is smaller than the receiving threshold.
  • the transceiver module 1802 is also specifically used for:
  • the terminal device supports the capability of msg3 repetition when falling back from 2 step RA to 4 step RA;
  • the terminal device supports msg3 repetition capability in each frequency band.
  • the terminal device can enable the third message msg3 repetition mode when the current number of preamble transmissions is greater than the transmission threshold and the random access RA process meets the preset conditions, so as to achieve the effect of coverage enhancement.
  • the communication device 180 may be a network device, a device in the network device, or a device that can be matched with the network device.
  • the communication device 180 on the network device side, the device includes:
  • the processing module 1801 is configured to determine that the terminal device has started the repetition mode of the third message msg3 in response to the number of preamble transmissions currently received by the terminal device being greater than the transmission threshold and the random access RA process meeting the preset conditions.
  • the current number of preamble transmissions is greater than the transmission threshold and is any of the following:
  • the number of preamble transmissions in the two-step 2 step RA process is greater than the maximum number of transmissions of message A MsgA;
  • the number of preamble transmissions in the two-step 2 step RA process is greater than the maximum number of rollback transmissions of message A MsgA;
  • the number of preamble transmissions in the 4 step 4 step RA process is greater than the maximum number of fallback transmissions of Msg1;
  • the number of preamble transmissions in the RA process is greater than the sum of the maximum number of transmissions of MsgA and the maximum number of transmissions of the first message Msg1.
  • the transceiver module 1802 is configured to send first indication information, where the first indication information is used to indicate the value of the transmission threshold.
  • the transceiver module 1802 is specifically used for:
  • the first indication information is sent through a radio resource control RRC message.
  • the first indication information is also used to indicate a cell identity corresponding to the transmission threshold, or a bandwidth part BWP identity corresponding to the transmission threshold.
  • the preset conditions include at least one of the following:
  • the random access process is not completed
  • the current RA type is 2 step RA;
  • the current RA type is a 4 step RA that is not a 2 step RA fallback;
  • the current RA type is 4 step RA backed by 2 step RA;
  • the downlink path loss reference point reference signal received power RSRP is smaller than the receiving threshold.
  • the transceiver module 1802 is also specifically used for:
  • Receive second indication information where the second indication information is used to indicate whether the terminal device supports msg3 repetition capability.
  • the capability of whether the terminal device supports msg3 repetition includes at least one of the following:
  • the terminal device supports the capability of msg3 repetition when falling back from 2 step RA to 4 step RA;
  • the terminal device supports msg3 repetition capability in each frequency band.
  • FIG. 19 is a schematic structural diagram of another communication device 190 provided by an embodiment of the present disclosure.
  • the communication device 190 may be a network device, a terminal device, a chip, a chip system, or a processor that supports the network device to implement the above method, or a chip, a chip system, or a chip that supports the terminal device to implement the above method. processor etc.
  • the device can be used to implement the methods described in the above method embodiments, and for details, refer to the descriptions in the above method embodiments.
  • Communications device 190 may include one or more processors 1901 .
  • the processor 1901 may be a general-purpose processor or a special-purpose processor. For example, it can be a baseband processor or a central processing unit.
  • the baseband processor can be used to process communication protocols and communication data
  • the central processing unit can be used to control communication devices (such as base stations, baseband chips, terminal equipment, terminal equipment chips, DU or CU, etc.) and execute computer programs , to process data for computer programs.
  • the communication device 190 may further include one or more memories 1902, on which a computer program 1904 may be stored, and the processor 1901 executes the computer program 1904, so that the communication device 190 executes the method described in the foregoing method embodiments. method.
  • data may also be stored in the memory 1902 .
  • the communication device 190 and the memory 1902 can be set separately or integrated together.
  • the communication device 190 may further include a transceiver 1905 and an antenna 1906 .
  • the transceiver 1905 may be called a transceiver unit, a transceiver, or a transceiver circuit, etc., and is used to implement a transceiver function.
  • the transceiver 1905 may include a receiver and a transmitter, and the receiver may be called a receiver or a receiving circuit for realizing a receiving function; the transmitter may be called a transmitter or a sending circuit for realizing a sending function.
  • the communication device 190 may further include one or more interface circuits 1907 .
  • the interface circuit 1907 is used to receive code instructions and transmit them to the processor 1901 .
  • the processor 1901 executes the code instructions to enable the communication device 190 to execute the methods described in the foregoing method embodiments.
  • the communication device 190 is a terminal device: the processor 1901 is used to execute step 21 in FIG. 2 ; step 32 in FIG. 3 ; step 42 in FIG. 4 ; step 52 in FIG. 5 and so on.
  • the transceiver 1905 is used to execute step 31 in FIG. 3 ; step 41 in FIG. 4 ; or step 51 in FIG. 5 , and so on.
  • the communication device 190 is a network device: the processor 1901 is used to execute step 101 in FIG. 10; step 112 in FIG. 11; or step 122 in FIG. 12, etc.; the transceiver 1905 is used to execute step 111 in FIG. 11; Step 121 in FIG. 12; Step 131 in FIG. 13; or Step 141 in FIG. 14 and so on.
  • the processor 1901 may store a computer program 1903 , and the computer program 1903 runs on the processor 1901 to enable the communication device 190 to execute the methods described in the foregoing method embodiments.
  • the computer program 1903 may be solidified in the processor 1901, and in this case, the processor 1901 may be implemented by hardware.
  • the communication device 190 may include a circuit, and the circuit may implement the function of sending or receiving or communicating in the foregoing method embodiments.
  • the processors and transceivers described in this disclosure can be implemented on integrated circuits (integrated circuits, ICs), analog ICs, radio frequency integrated circuits (RFICs), mixed signal ICs, application specific integrated circuits (ASICs), printed circuit boards ( printed circuit board, PCB), electronic equipment, etc.
  • the processor and transceiver can also be fabricated using various IC process technologies such as complementary metal oxide semiconductor (CMOS), nMetal-oxide-semiconductor (NMOS), P-type Metal oxide semiconductor (positive channel metal oxide semiconductor, PMOS), bipolar junction transistor (bipolar junction transistor, BJT), bipolar CMOS (BiCMOS), silicon germanium (SiGe), gallium arsenide (GaAs), etc.
  • CMOS complementary metal oxide semiconductor
  • NMOS nMetal-oxide-semiconductor
  • PMOS P-type Metal oxide semiconductor
  • BJT bipolar junction transistor
  • BiCMOS bipolar CMOS
  • SiGe silicon germanium
  • GaAs gallium arsenide
  • the communication device described in the above embodiments may be a network device or a terminal device, but the scope of the communication device described in this disclosure is not limited thereto, and the structure of the communication device may not be limited by FIG. 19 .
  • a communication device may be a stand-alone device or may be part of a larger device.
  • the communication device may be:
  • a set of one or more ICs may also include storage components for storing data and computer programs;
  • ASIC such as modem (Modem);
  • the communication device may be a chip or a chip system
  • the schematic structural diagram of the chip shown in FIG. 20 refer to the schematic structural diagram of the chip shown in FIG. 20 .
  • the chip shown in FIG. 20 includes a processor 2001 and an interface 2002 .
  • the number of processors 2001 may be one or more, and the number of interfaces 2002 may be more than one.
  • the processor 2001 is configured to execute step 21 in FIG. 2 ; step 32 in FIG. 3 ; step 42 in FIG. 4 ; step 52 in FIG. 5 and so on.
  • the interface 2002 is used to execute step 31 in FIG. 3 ; step 41 in FIG. 4 ; or step 51 in FIG. 5 , and so on.
  • the processor 2001 is configured to execute step 101 in FIG. 10 ; step 112 in FIG. 11 ; or step 122 in FIG. 12 and so on.
  • the interface 2002 is used to execute step 111 in FIG. 11 ; step 121 in FIG. 12 ; step 131 in FIG. 13 ; or step 141 in FIG. 14 and so on.
  • the chip further includes a memory 2003 for storing necessary computer programs and data.
  • the embodiment of the present disclosure also provides a communication system, the system includes the communication device as the terminal device and the communication device as the network device in the aforementioned embodiment of Figure 18, or the system includes the communication device as the terminal device in the aforementioned embodiment of Figure 19 devices and communication devices as network devices.
  • the present disclosure also provides a computer-readable storage medium on which instructions are stored, and when the instructions are executed by a computer, the functions of any one of the above method embodiments are realized.
  • the present disclosure also provides a computer program product, which implements the functions of any one of the above method embodiments when executed by a computer.
  • all or part of them may be implemented by software, hardware, firmware or any combination thereof.
  • software When implemented using software, it may be implemented in whole or in part in the form of a computer program product.
  • the computer program product comprises one or more computer programs. When the computer program is loaded and executed on the computer, all or part of the processes or functions according to the embodiments of the present disclosure will be generated.
  • the computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable devices.
  • the computer program can be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer program can be downloaded from a website, computer, server or data center Transmission to another website site, computer, server or data center by wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.).
  • the computer-readable storage medium may be any available medium that can be 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, a high-density digital video disc (digital video disc, DVD)), or a semiconductor medium (for example, a solid state disk (solid state disk, SSD)) etc.
  • a magnetic medium for example, a floppy disk, a hard disk, a magnetic tape
  • an optical medium for example, a high-density digital video disc (digital video disc, DVD)
  • a semiconductor medium for example, a solid state disk (solid state disk, SSD)
  • At least one in the present disclosure can also be described as one or more, and a plurality can be two, three, four or more, and the present disclosure is not limited.
  • the technical feature is distinguished by "first”, “second”, “third”, “A”, “B”, “C” and “D”, etc.
  • the technical features described in the “first”, “second”, “third”, “A”, “B”, “C” and “D” have no sequence or order of magnitude among the technical features described.
  • first, second, and third may be used in the embodiment of the present application to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another.
  • first information may also be called second information, and similarly, second information may also be called first information.
  • second information may also be called first information.
  • the words “if” and “if” may be construed as “at” or “when” or “in response to a determination” or "under circumstances”.
  • each table in the present disclosure may be configured or predefined.
  • the values of the information in each table are just examples, and may be configured as other values, which are not limited in the present disclosure.
  • the corresponding relationship shown in some rows may not be configured.
  • appropriate deformation adjustments can be made based on the above table, for example, splitting, merging, and so on.
  • the names of the parameters shown in the titles of the above tables may also adopt other names understandable by the communication device, and the values or representations of the parameters may also be other values or representations understandable by the communication device.
  • other data structures can also be used, for example, arrays, queues, containers, stacks, linear tables, pointers, linked lists, trees, graphs, structures, classes, heaps, hash tables or hash tables can be used wait.
  • Predefinition in the present disclosure can be understood as definition, predefinition, storage, prestorage, prenegotiation, preconfiguration, curing, or prefiring.

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Abstract

本公开实施例公开了一种基于四步随机接入的第三条消息重复的覆盖增强方法及其装置，可应用于通信技术领域，其中，由终端设备执行的方法包括：响应于当前的前导码preamble传输次数大于传输阈值、且随机接入RA过程满足预设条件，开启第三条消息msg3重复repetition模式（21）。由此，终端设备可以在当前的preamble传输次数大于传输阈值、且RA过程满足预设条件的情况下，开启第三条消息msg3 repetition模式，从而实现覆盖增强的效果。

Description

一种基于四步随机接入的第三条消息重复的覆盖增强方法 技术领域
本公开涉及通信技术领域，尤其涉及一种基于四步随机接入的第三条消息重复的覆盖增强方法及其装置。
背景技术
在通信系统中，上行覆盖的瓶颈之一是四步4step随机接入(Random Access，RA)过程中发送第三条消息msg3的上行共享物理信道(Physical Uplink Share CHannel，PUSCH)信道。相关技术中，可以通过msg3重复repetition的方式增强覆盖。
发明内容
本公开实施例提供一种基于四步随机接入的第三条消息重复的覆盖增强方法及其装置，可应用于通信技术领域中。
第一方面，本公开实施例提供一种基于四步随机接入的第三条消息重复的覆盖增强方法及其装置，所述方法由终端设备执行，该方法包括：响应于当前的前导码preamble传输次数大于传输阈值、且随机接入RA过程满足预设条件，开启第三条消息msg3重复repetition模式。
本公开实施例中，终端设备可以在当前的preamble传输次数大于传输阈值、且RA过程满足预设条件的情况下，开启第三条消息msg3repetition模式，从而实现覆盖增强的效果。
可选的，所述当前的前导码preamble传输次数大于传输阈值，为以下任一项：
两步2 step RA过程中preamble传输次数大于消息A MsgA的最大传输次数；
两步2 step RA过程中preamble传输次数大于消息A MsgA的回退最大传输次数；
四步4 step RA过程中preamble传输次数大于第一条消息Msg1的最大传输次数；
四步4 step RA过程中preamble传输次数大于Msg1的回退最大传输次数；
RA过程中preamble传输次数大于MsgA的最大传输次数与第一条消息Msg1的最大传输次数的和。
可选的，还包括：
接收第一指示信息，其中，所述第一指示信息，用于指示所述传输阈值的取值。
可选的，所述接收第一指示信息，包括：
通过广播消息，接收所述第一指示信息；
或者，
通过无线资源控制RRC消息，接收所述第一指示信息。
可选的，所述第一指示信息，还用于指示与所述传输阈值对应的小区标识，或者，与所述传输阈值对应的带宽部分BWP标识。
可选的，所述预设条件包括以下至少一项：
随机接入过程未完成；
当前RA类型为2 step RA；
当前RA类型为非2 step RA回退的4 step RA；
竞争解决contention resolution失败；
当前RA类型为由2 step RA回退的4 step RA；
下行路损参考点参考信号接收功率RSRP小于接收阈值。
可选的，还包括：
发送第二指示信息，其中，所述第二指示信息用于指示所述终端设备是否支持msg3 repetition的能力。
可选的，所述终端设备是否支持msg3重复的能力包括以下至少一项：
所述终端设备在从2 step RA回退至4 step RA的情况下，是否支持msg3 repetition的能力；
所述终端设备在每个频段是否支持msg3 repetition的能力。
第二方面，本公开实施例提供另一种基于四步随机接入的第三条消息重复的覆盖增强方法及其装置，所述方法由网络设备执行，该方法包括：
响应于当前接收的终端设备发送的前导码preamble传输次数大于传输阈值、且随机接入RA过程满足预设条件，确定终端设备开启了第三条消息msg3重复repetition模式。
本公开实施例中，网络设备可以在当前接收的终端设备发送的前导码preamble传输次数大于传输阈值、且随机接入RA过程满足预设条件，确定终端设备开启了第三条消息msg3重复repetition模式，从而网络设备可以基于终端设备重复发送的msg3，与终端设备建立连接，进而实现覆盖增强的效果。
可选的，所述当前的前导码preamble传输次数大于传输阈值，为以下任一项：
两步2 step RA过程中preamble传输次数大于消息A MsgA的最大传输次数；
两步2 step RA过程中preamble传输次数大于消息A MsgA的回退最大传输次数；
四步4 step RA过程中preamble传输次数大于第一条消息Msg1的最大传输次数；
四步4 step RA过程中preamble传输次数大于Msg1的回退最大传输次数；
RA过程中preamble传输次数大于MsgA的最大传输次数与第一条消息Msg1的最大传输次数的和。
可选的，还包括：
发送第一指示信息，其中，所述第一指示信息，用于指示所述传输阈值的取值。
可选的，所述发送第一指示信息，包括：
通过广播消息，发送所述第一指示信息；
或者，
通过无线资源控制RRC消息，发送所述第一指示信息。
可选的，所述第一指示信息，还用于指示与所述传输阈值对应的小区标识，或者，与所述传输阈值对应的带宽部分BWP标识。
可选的，所述预设条件包括以下至少一项：
随机接入过程未完成；
当前RA类型为2 step RA；
当前RA类型为非2 step RA回退的4 step RA；
竞争解决contention resolution失败；
当前RA类型为由2 step RA回退的4 step RA；
下行路损参考点参考信号接收功率RSRP小于接收阈值。
可选的，还包括：
接收第二指示信息，其中，所述第二指示信息用于指示所述终端设备是否支持msg3 repetition的能力。
可选的，所述终端设备是否支持msg3 repetition的能力包括以下至少一项：
所述终端设备在从2 step RA回退至4 step RA的情况下，是否支持msg3 repetition的能力；
所述终端设备在每个频段是否支持msg3 repetition的能力。
第三方面，本公开实施例提供一种通信装置，该通信装置具有实现上述第一方面所述的方法中终端设备的部分或全部功能，比如通信装置的功能可具备本公开中的部分或全部实施例中的功能，也可以具备单独实施本公开中的任一个实施例的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的单元或模块。
第四方面，本公开实施例提供另一种通信装置，该通信装置具有实现上述第二方面所述的方法示例中网络设备的部分或全部功能，比如通信装置的功能可具备本公开中的部分或全部实施例中的功能，也可以具备单独实施本公开中的任一个实施例的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的单元或模块。
第五方面，本公开实施例提供一种通信装置，该通信装置包括处理器，当该处理器调用存储器中的计算机程序时，执行上述第一方面所述的方法。
第六方面，本公开实施例提供一种通信装置，该通信装置包括处理器，当该处理器调用存储器中的计算机程序时，执行上述第二方面所述的方法。
第七方面，本公开实施例提供一种通信装置，该通信装置包括处理器和存储器，该存储器中存储有计算机程序；当所述计算机程序被所述处理器执行时，使该通信装置执行上述第一方面所述的方法。
第八方面，本公开实施例提供一种通信装置，该通信装置包括处理器和存储器，该存储器中存储有计算机程序；当所述计算机程序被所述处理器执行时，使该通信装置执行上述第二方面所述的方法。
第九方面，本公开实施例提供一种通信装置，该装置包括处理器和接口电路，该接口电路用于接收代码指令并传输至该处理器，该处理器用于运行所述代码指令以使该装置执行上述第一方面所述的方法。
第十方面，本公开实施例提供一种通信装置，该装置包括处理器和接口电路，该接口电路用于接收代码指令并传输至该处理器，该处理器用于运行所述代码指令以使该装置执行上述第二方面所述的方法。
第十一方面，本公开实施例提供一种通信系统，该系统包括第三方面所述的通信装置以及第四方面所述的通信装置，或者，该系统包括第五方面所述的通信装置以及第六方面所述的通信装置，或者，该系统包括第七方面所述的通信装置以及第八方面所述的通信装置，或者，该系统包括第九方面所述的通信装置以及第十方面所述的通信装置。
第十二方面，本发明实施例提供一种计算机可读存储介质，用于储存为上述终端设备所用的指令，当所述指令被执行时，使上述第一方面所述的方法被实现。
第十三方面，本发明实施例提供一种计算机可读存储介质，用于储存为上述网络设备所用的指令，当所述指令被执行时，使上述第二方面所述的方法被实现。
第十四方面，本公开还提供一种包括计算机程序的计算机程序产品，当其在计算机上运行时，使得计算机执行上述第一方面所述的方法。
第十五方面，本公开还提供一种包括计算机程序的计算机程序产品，当其在计算机上运行时，使得计算机执行上述第二方面所述的方法。
第十六方面，本公开提供一种芯片系统，该芯片系统包括至少一个处理器和接口，用于支持终端设备实现第一方面所涉及的功能，例如，确定或处理上述方法中所涉及的数据和信息中的至少一种。在一种可能的设计中，所述芯片系统还包括存储器，所述存储器，用于保存终端设备必要的计算机程序和数据。该芯片系统，可以由芯片构成，也可以包括芯片和其他分立器件。
第十七方面，本公开提供一种芯片系统，该芯片系统包括至少一个处理器和接口，用于支持网络设备实现第二方面所涉及的功能，例如，确定或处理上述方法中所涉及的数据和信息中的至少一种。在一种可能的设计中，所述芯片系统还包括存储器，所述存储器，用于保存网络设备必要的计算机程序和数据。该芯片系统，可以由芯片构成，也可以包括芯片和其他分立器件。
第十八方面，本公开提供一种计算机程序，当其在计算机上运行时，使得计算机执行上述第一方面所述的方法。
第十九方面，本公开提供一种计算机程序，当其在计算机上运行时，使得计算机执行上述第二方面所述的方法。
附图说明
为了更清楚地说明本公开实施例或背景技术中的技术方案，下面将对本公开实施例或背景技术中所需要使用的附图进行说明。
图1是本公开实施例提供的一种通信系统的架构示意图；
图2是本公开一实施例提供的一种基于四步随机接入的第三条消息重复的覆盖增强方法的流程示意图；
图3是本公开另一实施例提供的一种基于四步随机接入的第三条消息重复的覆盖增强方法的流程示意图；
图4是本公开另一实施例提供的一种基于四步随机接入的第三条消息重复的覆盖增强方法的流程示意图；
图5是本公开另一实施例提供的一种基于四步随机接入的第三条消息重复的覆盖增强方法的流程示意图；
图6是本公开另一实施例提供的一种基于四步随机接入的第三条消息重复的覆盖增强方法的流程示意图；
图7是本公开另一实施例提供的一种基于四步随机接入的第三条消息重复的覆盖增强方法的流程示意图；
图8是本公开另一实施例提供的一种基于四步随机接入的第三条消息重复的覆盖增强方法的流程示意图；
图9是本公开另一实施例提供的一种基于四步随机接入的第三条消息重复的覆盖增强方法的流程示意图；
图10是本公开另一实施例提供的一种基于四步随机接入的第三条消息重复的覆盖增强方法的流程示意图；
图11是本公开另一实施例提供的一种基于四步随机接入的第三条消息重复的覆盖增强方法的流程示意图；
图12是本公开另一实施例提供的一种基于四步随机接入的第三条消息重复的覆盖增强方法的流程示意图；
图13是本公开另一实施例提供的一种基于四步随机接入的第三条消息重复的覆盖增强方法的流程示意图；
图14是本公开另一实施例提供的一种基于四步随机接入的第三条消息重复的覆盖增强方法的流程示意图；
图15是本公开另一实施例提供的一种基于四步随机接入的第三条消息重复的覆盖增强方法的流程示意图；
图16是本公开另一实施例提供的一种基于四步随机接入的第三条消息重复的覆盖增强方法的流程示意图；
图17是本公开另一实施例提供的一种基于四步随机接入的第三条消息重复的覆盖增强方法的流程示意图；
图18是本公开一实施例的通信装置的结构示意图；
图19是本公开另一实施例的通信装置的结构示意图；
图20是本公开一实施例的芯片的结构示意图。
具体实施方式
这里将详细地对示例性实施例进行说明，其示例表示在附图中。下面的描述涉及附图时，除非另有表示，不同附图中的相同数字表示相同或相似的要素。以下示例性实施例中所描述的实施方式并不代表与本公开相一致的所有实施方式。相反，它们仅是与如所附权利要求书中所详述的、本公开的一些方面相一致的装置和方法的例子。
可以理解的是，本公开中“多个”是指两个或两个以上，其它量词与之类似。“和/或”，描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。字符“/”一般表示前后关联对象是一种“或”的关系。单数形式的“一种”、“所述”和“该”也旨在包括多数形式，除非上下文清楚地表示其他含义。
为了便于理解，首先介绍本申请涉及的术语。
1、随机接入(Random Access，RA)
随机接入过程是指从用户发送随机接入前导码开始尝试接入网络到与网络间建立起基本的信令连接之前的过程。随机接入是移动通信系统中非常关键的步骤，也是终端设备与网络建立通信链路的最后一步。终端设备可以通过随机接入与网络设备进行信息交互。其中，随机接入过程可以包括两步随机接入和四步随机接入。
其中，四步4 step随机接入过程包括：终端设备通过第一条消息msg1发送随机接入前导码preamble；网络设备通过第二条消息msg2发送随机接入响应消息(Random Access Response，RAR)；终端设备通过第三条消息msg3发送无线资源控制(radio resource control，RRC)连接请求；终端设备通过第四条消息msg4接收RRC连接建立(此过程也即为竞争解决contention resolution过程)
两步2 step随机接入过程包括：终端设备向网络设备发送的A消息msgA，网络设备向终端设备发送B消息msgB。其中，msgA中包含与四步随机接入中msg1及msg3等效的内容；msgB中包含与四步随机接入中msg2及msg4等效的内容。
2、第三条消息(msg3)
4 step随机接入过程中的第三条消息被称为Msg3，根据终端设备状态的不同和应用场景的不同，Msg3消息的内容也可能不同。Msg3中需要包含一个重要信息：每个终端设备唯一的标识，该标识将用于四步随机接入中的第四步竞争解决。
3、无线资源控制(radio resource control，RRC)
无线资源控制(radio resource control，RRC)，又称为无线资源管理或者无线资源分配，是指通过一定的策略和手段进行无线资源管理、控制和调度，在满足服务质量的要求下，尽可能地充分利用有限的无线网络资源，确保到达规划的覆盖区域，尽可能地提高业务容量和资源利用率。
为了更好的理解本公开实施例公开的一种基于四步随机接入的第三条消息重复的覆盖增强方法及其装置，下面首先对本公开实施例适用的通信系统进行描述。
请参见图1，图1为本公开实施例提供的一种通信系统的架构示意图。该通信系统可包括但不限于一个网络设备、一个终端设备，图1所示的设备数量和形态仅用于举例并不构成对本公开实施例的限定，实际应用中可以包括两个或两个以上的网络设备，两个或两个以上的终端设备。图1所示的通信系统可以包括一个网络设备11、一个终端设备12。
需要说明的是，本公开实施例的技术方案可以应用于各种通信系统。例如：长期演进(long term  evolution，LTE)系统、第五代(5th generation，5G)移动通信系统、5G新空口(new radio，NR)系统，或者其他未来的新型移动通信系统等。
本公开实施例中的网络设备11是网络侧的一种用于发射或接收信号的实体。例如，网络设备11可以为演进型基站(evolved NodeB，eNB)、传输点(transmission reception point，TRP)、NR系统中的下一代基站(next generation NodeB，gNB)、其他未来移动通信系统中的基站或无线保真(wireless fidelity，WiFi)系统中的接入节点等。本公开的实施例对网络设备所采用的具体技术和具体设备形态不做限定。本公开实施例提供的网络设备可以是由集中单元(central unit，CU)与分布式单元(distributed unit，DU)组成的，其中，CU也可以称为控制单元(control unit)，采用CU-DU的结构可以将网络设备，例如基站的协议层拆分开，部分协议层的功能放在CU集中控制，剩下部分或全部协议层的功能分布在DU中，由CU集中控制DU。
本公开实施例中的终端设备12是用户侧的一种用于接收或发射信号的实体，如手机。终端设备也可以称为终端设备(terminal)、用户设备(user equipment，UE)、移动台(mobile station，MS)、移动终端设备(mobile terminal，MT)等。终端设备可以是具备通信功能的汽车、智能汽车、手机(mobile phone)、穿戴式设备、平板电脑(Pad)、带无线收发功能的电脑、虚拟现实(virtual reality，VR)终端设备、增强现实(augmented reality，AR)终端设备、工业控制(industrial control)中的无线终端设备、无人驾驶(self-driving)中的无线终端设备、远程手术(remote medical surgery)中的无线终端设备、智能电网(smart grid)中的无线终端设备、运输安全(transportation safety)中的无线终端设备、智慧城市(smart city)中的无线终端设备、智慧家庭(smart home)中的无线终端设备等等。本公开的实施例对终端设备所采用的具体技术和具体设备形态不做限定。
可以理解的是，本公开实施例描述的通信系统是为了更加清楚的说明本公开实施例的技术方案，并不构成对于本公开实施例提供的技术方案的限定，本领域普通技术人员可知，随着系统架构的演变和新业务场景的出现，本公开实施例提供的技术方案对于类似的技术问题，同样适用。
下面结合附图对本公开所提供的基于四步随机接入的第三条消息重复的覆盖增强方法进行详细地介绍。
请参见图2，图2是本公开实施例提供的一种基于四步随机接入的第三条消息重复的覆盖增强方法的流程示意图,该方法由终端设备执行。如图2所示，该方法可以包括但不限于如下步骤：
步骤21，响应于当前的前导码preamble传输次数大于传输阈值、且随机接入RA过程满足预设条件，开启第三条消息msg3重复repetition模式。
需要说明的是，相关技术中可以通过msg3 repetition的方式增强覆盖。但是，在4 step RA过程中，终端设备是否开启msg3 repetition；或者，2step RA回退fallback到4 step RA后，是否可以开启Msg3 repetition；或者，在支持2step RA fallback到4step RA后开启Msg3 repetition的情况下，什么条件下，可以开启Msg3 repetition；或者，2 step RA期间，终端设备是否可以在回退至4 step RA前启动msg3 repetition，尚未确定。
另外，若不支持2-step RA fallback到4-step RA后开启Msg3 repetition的情况下，若终端设备基于preamble传输次数大于Msg1的最大传输次数(msg1-TransMax)这一条件来判断是否开启Msg3 repetition，可能会导致当前的4-step RA可能是从2-step RA fallback回来的，且网络设备配置的MsgA的最大传输次数(msgA-TransMax)的值小于msg1-TransMax的值，则preamble传输次数仍可以满足大于msg1-TransMax的条件，从而导致在不支持2-step RA fallback到4-step RA启动Msg3 repetition的情况下，启动了Msg3 repetition，从而导致Msg3 repetition启动异常。
因此，本公开中，提供一种启动四步随机接入的第三条消息重复模式的方法，从而使得在实现覆盖增强的同时，避免出现Msg3 repetition模式的异常启动。
可选的，当前的前导码preamble传输次数大于传输阈值，可以为以下任一项：
两步2 step随机接入RA过程中preamble传输次数大于消息A MsgA的最大传输次数(msgA-TransMax)；
两步2 step RA过程中preamble传输次数大于消息A MsgA的回退最大传输次数(msgA-TransMax-CE)；
四步4 step RA过程中preamble传输次数大于第一条消息Msg1的最大传输次数(msg1-TransMax)；
四步4 step RA过程中preamble传输次数大于Msg1的回退最大传输次数(msg1-TransMax-fallback)；
RA过程中preamble传输次数大于MsgA的最大传输次数与第一条消息Msg1的最大传输次数的和。
可以理解的是，RA过程可以包括2 step RA及4 step RA，即，2 step RA及4 step RA过程中preamble总共的传输次数需大于MsgA的最大传输次数与Msg1的最大传输次数的和。
可选的，预设条件可以包括以下至少一项：
随机接入过程未完成；
当前RA类型为2 step RA；
当前RA类型为非2 step RA回退的4 step RA；
竞争解决contention resolution失败；
当前RA类型为由2 step RA回退的4 step RA；
下行路损参考点参考信号接收功率(Reference Signal Receiving Power，RSRP)小于接收阈值。
通过实施本公开实施例，终端设备可以在当前的preamble传输次数大于传输阈值、且RA过程满足预设条件的情况下，开启第三条消息msg3 repetition模式，从而实现覆盖增强的效果。
请参见图3，图3以不支持2-step RA回退fallback到4-step RA后开启Msg3 repetition模式为例，对本公开提供的基于四步随机接入的第三条消息重复的覆盖增强方法进行说明。图3是本公开实施例提供的一种基于四步随机接入的第三条消息重复的覆盖增强方法的流程示意图,该方法由终端设备执行。如图3所示，该方法可以包括但不限于如下步骤：
步骤31，接收第一指示信息，其中，第一指示信息，用于指示传输阈值的取值。
需要说明的是，对于不支持2-step RA回退fallback到4-step RA后启动Msg3 repetition的情况，本公开实施例中，第一指示信息指示的传输阈值的取值可以为Msg1的最大传输次数。
可选的，终端设备可以通过广播消息，接收第一指示信息；或者，终端设备也可以通过无线资源控制RRC消息，接收第一指示信息。
可选的，广播消息可以为SIB1(System Information Block Type1)消息,本公开对此不做限定。
可选的，第一指示信息，还可以用于指示与传输阈值对应的小区标识。即，仅当终端设备待接入的小区为小区标识指示的小区的情况下，才能基于该传输阈值，确定是否开启msg3 repetition模式。
或者，与传输阈值对应的带宽部分(BandWidth Part，BWP)标识。即，仅当终端设备待使用的带宽部分为带宽部分标识指示的带宽部分的情况下，才能基于该传输阈值，确定是否开启msg3 repetition模式。
步骤32，在当前的preamble传输次数大于传输阈值、且RA过程满足随机接入过程未完成、当前RA类型为非2 step RA回退的4 step RA、及下行路损参考点RSRP小于接收阈值的情况下，开启msg3 repetition模式。
本公开实施例中，终端设备在接收网络设备发送的RAR之后，若终端设备判断RA过程未完成，且当前的4-step RA不是由2-step RA回退fallback回来，且preamble传输次数大于第一指示信息指示的msg1-TransMax，即PREAMBLE_TRANSMISSION_COUNTER＝Msg1-TransMax+1，终端设备即可开启msg3 repetition模式。
可选的，终端设备还可以在开启msg3 repetition之前，进一步判断下行路损参考点RSRP是否小于接收阈值，在下行路损参考点RSRP小于接收阈值的情况下，开启msg3 repetition模式。其中，接收阈值可以为msg3 repetition的RSRP门限(rsrp-Threshold-msg3 repetition)，本公开对此不做限定。
可选的，终端设备在确定4-step RA过程未完成之后，可以先判断是否已经开启msg3 repetition模式，进而在未开启msg3 repetition模式的情况下，进一步判断是否满足当前RA类型为非2 step RA回退的4 step RA、下行路损参考点RSRP小于接收阈值、及当前的preamble传输次数大于msg1-TransMax等预设条件。从而，可以节省终端设备的资源。
通过实施本公开实施例，终端设备在接收网络设备指示的传输阈值的取值之后，进而在当前的preamble传输次数大于传输阈值、且满足随机接入过程未完成、当前RA类型为非2 step RA回退的4 step RA、及下行路损参考点RSRP小于接收阈值的情况下，开启msg3 repetition模式，从而实现覆盖增强的效果。
请参见图4，图4以不支持2-step RA回退fallback到4-step RA后开启Msg3 repetition模式为例，对本公开提供的基于四步随机接入的第三条消息重复的覆盖增强方法进行说明。图4是本公开实施例提供的一种基于四步随机接入的第三条消息重复的覆盖增强方法的流程示意图,该方法由终端设备执行。如图4所示，该方法可以包括但不限于如下步骤：
步骤41，接收第一指示信息，其中，第一指示信息，用于指示传输阈值的取值。
需要说明的是，对于不支持2-step RA回退fallback到4-step RA后启动Msg3 repetition的情况，本公开实施例中，第一指示信息指示的传输阈值的取值可以为Msg1的最大传输次数。
其中，步骤41的具体实现形式，可参照本公开中其他各实施例中的详细步骤，此处不再详细描述。
步骤42，在当前的preamble传输次数大于传输阈值、且RA过程满足随机接入过程未完成、当前RA类型为非2 step RA回退的4 step RA、下行路损参考点RSRP小于接收阈值、及contention resolution失败的情况下，开启msg3 repetition模式。
本公开实施例中，终端设备在contention resolution失败之后，若终端设备判断RA过程未完成，且当前的4-step RA不是由2-step RA回退fallback回来，且preamble传输次数大于第一指示信息指示的msg1-TransMax，即PREAMBLE_TRANSMISSION_COUNTER＝Msg1-TransMax+1，终端设备即可开启msg3 repetition模式。
可选的，终端设备还可以在开启msg3 repetition之前，进一步同时判断下行路损参考点RSRP是否小于接收阈值，在下行路损参考点RSRP小于接收阈值的情况下，开启msg3 repetition模式。其中，接收阈值可以为msg3 repetition的RSRP门限(rsrp-Threshold-msg3 repetition)，本公开对此不做限定。
可选的，终端设备可以在确定4-step RA过程未完成之后，可以先判断是否已经开启msg3 repetition模式，进而在未开启msg3 repetition模式的情况下，进一步判断是否满足当前RA类型为非2 step RA回退的4 step RA、下行路损参考点RSRP小于接收阈值、及contention resolution失败、及当前的preamble传输次数大于msg1-TransMax等预设条件。从而，可以节省终端设备的资源。
通过实施本公开实施例，终端设备在接收网络设备指示的传输阈值的取值之后，进而在当前的preamble传输次数大于传输阈值、且满足随机接入过程未完成、当前RA类型为非2 step RA回退的4 step RA、下行路损参考点RSRP小于接收阈值、及竞争解决contention resolution失败的情况下，开启msg3 repetition模式，从而实现覆盖增强的效果。
请参见图5，图5以支持2-step RA回退fallback到4-step RA后开启Msg3 repetition模式为例，对本公开提供的基于四步随机接入的第三条消息重复的覆盖增强方法进行说明。图5是本公开实施例提供的一种基于四步随机接入的第三条消息重复的覆盖增强方法的流程示意图,该方法由终端设备执行。如图5所示，该方法可以包括但不限于如下步骤：
步骤51，接收第一指示信息，其中，第一指示信息，用于指示传输阈值的取值。
需要说明的是，对于支持2-step RA回退fallback到4-step RA后启动Msg3 repetition的情况，本公开实施例中，第一指示信息指示的传输阈值的取值可以为MsgA的最大传输次数与Msg1的最大传输次数的和。
其中，步骤51的具体实现形式，可参照本公开中其他各实施例中的详细步骤，此处不再详细描述。
步骤52，在当前的preamble传输次数大于传输阈值、且RA过程满足随机接入过程未完成、当前RA类型为非2 step RA回退的4 step RA、下行路损参考点RSRP小于接收阈值、及contention resolution失败的情况下，开启msg3 repetition模式。
本公开实施例中，终端设备在接收RAR阶段之后，或者在contention resolution失败之后，确定RA过程未完成，且当前的RA类型为4 step RA，且当前的4-step RA是由2-step RA fallback回来，且终端设备应用了msg1-TransMax，则在PREAMBLE_TRANSMISSION_COUNTER＝msg1-TransMax+msgA-TransMax+1时，终端设备即可开启msg3 repetition模式。
可选的，终端设备还可以在开启msg3 repetition之前，进一步判断下行路损参考点RSRP是否小于接收阈值，在下行路损参考点RSRP小于接收阈值的情况下，开启msg3 repetition模式。其中，接收阈值可以为msg3 repetition的RSRP门限(rsrp-Threshold-msg3 repetition)，本公开对此不做限定。
可选的，终端设备可以在确定4-step RA过程未完成之后，可以先判断是否已经开启msg3 repetition模式，进而在未开启msg3 repetition模式的情况下，进一步判断是否满足当前RA类型为非2 step RA回退的4 step RA、下行路损参考点RSRP小于接收阈值、及当前的preamble传输次数大于msg1-TransMax与msgA-TransMax的和等预设条件。从而，可以节省终端设备的资源。
通过实施本公开实施例，终端设备在接收网络设备指示的传输阈值的取值之后，进而在当前的preamble传输次数大于传输阈值、且满足随机接入过程未完成、当前RA类型为非2 step RA回退的4 step RA、下行路损参考点RSRP小于接收阈值、及竞争解决contention resolution失败的情况下，开启msg3 repetition模式，从而实现覆盖增强的效果。
请参见图6，图6以支持2-step RA回退fallback到4-step RA后开启Msg3 repetition模式为例，对本公开提供的基于四步随机接入的第三条消息重复的覆盖增强方法进行说明。图6是本公开实施 例提供的一种基于四步随机接入的第三条消息重复的覆盖增强方法的流程示意图,该方法由终端设备执行。如图6所示，该方法可以包括但不限于如下步骤：
步骤61，接收第一指示信息，其中，第一指示信息，用于指示传输阈值的取值。
需要说明的是，对于支持2-step RA fallback到4-step RA后启动Msg3 repetition的情况，本公开实施例中，第一指示信息指示的传输阈值的取值可以为Msg1的回退最大传输次数(msg1-TransMax-fallback)。
其中，步骤61的具体实现形式，可参照本公开中其他各实施例中的详细步骤，此处不再详细描述。
步骤62，在当前的preamble传输次数大于传输阈值、且RA过程满足随机接入过程未完成、当前RA类型为非2 step RA回退的4 step RA、下行路损参考点RSRP小于接收阈值、及contention resolution失败的情况下，开启msg3 repetition模式。
本公开实施例中，终端设备在接收RAR阶段之后，或者在contention resolution失败之后，确定RA过程未完成，且当前的RA类型为4 step RA，且当前的4-step RA是由2-step RA fallback回来，且终端设备应用了的msg1-TransMax-fallback，则在PREAMBLE_TRANSMISSION_COUNTER＝msg1-TransMax-fallback+1时，终端设备即可开启msg3 repetition模式。
可选的，终端设备还可以在开启msg3 repetition之前，进一步判断下行路损参考点RSRP是否小于接收阈值，在下行路损参考点RSRP小于接收阈值的情况下，开启msg3 repetition模式。其中，接收阈值可以为msg3 repetition的RSRP门限(rsrp-Threshold-msg3 repetition)，本公开对此不做限定。
可选的，终端设备可以在确定4-step RA过程未完成之后，可以先判断是否已经开启msg3 repetition模式，进而在未开启msg3 repetition模式的情况下，进一步判断是否满足当前RA类型为非2 step RA回退的4 step RA、下行路损参考点RSRP小于接收阈值、及当前的preamble传输次数大于msg1-TransMax-fallback等预设条件。从而，可以节省终端设备的资源。
通过实施本公开实施例，终端设备在接收网络设备指示的传输阈值的取值之后，进而在当前的preamble传输次数大于传输阈值、且满足随机接入过程未完成、当前RA类型为非2 step RA回退的4 step RA、下行路损参考点RSRP小于接收阈值、及contention resolution的情况下，开启msg3 repetition模式，从而实现覆盖增强的效果。
请参见图7，图7以支持2-step RA回退fallback到4-step RA后开启Msg3 repetition模式为例，对本公开提供的基于四步随机接入的第三条消息重复的覆盖增强方法进行说明。图7是本公开实施例提供的一种基于四步随机接入的第三条消息重复的覆盖增强方法的流程示意图,该方法由终端设备执行。如图7所示，该方法可以包括但不限于如下步骤：
步骤71，接收第一指示信息，其中，第一指示信息，用于指示传输阈值的取值。
需要说明的是，对于支持2-step RA fallback到4-step RA后启动Msg3 repetition的情况，本公开实施例中，第一指示信息指示的传输阈值的取值可以为MsgA的最大传输次数与Msg1的最大传输次数的和。
其中，步骤71的具体实现形式，可参照本公开中其他各实施例中的详细步骤，此处不再详细描述。
步骤72，在当前的preamble传输次数大于传输阈值、且RA过程满足随机接入过程未完成、当前RA类型为非2 step RA回退的4 step RA、下行路损参考点RSRP小于接收阈值、及contention resolution的情况下，开启msg3 repetition模式。
本公开实施例中，终端设备在接收RAR阶段之后，或者在contention resolution失败之后，确定RA过程未完成，且当前的RA类型为4 step RA，且当前的4-step RA是由2-step RA fallback回来，且终端设备应用了msg1-TransMax-fallback，则在PREAMBLE_TRANSMISSION_COUNTER＝msgA-TransMax+msg1-TransMax-fallback+1时，终端设备即可开启msg3 repetition模式。
可选的，终端设备还可以在开启msg3 repetition之前，进一步判断下行路损参考点RSRP是否小于接收阈值，在下行路损参考点RSRP小于接收阈值的情况下，开启msg3 repetition模式。其中，接收阈值可以为msg3 repetition的RSRP门限(rsrp-Threshold-msg3 repetition)，本公开对此不做限定。
可选的，终端设备可以在确定4-step RA过程未完成之后，可以先判断是否已经开启msg3 repetition模式，进而在未开启msg3 repetition模式的情况下，进一步判断是否满足当前RA类型为非2 step RA回退的4 step RA、下行路损参考点RSRP小于接收阈值、及当前的preamble传输次数大于msgA-TransMax与msg1-TransMax的和等预设条件。从而，可以节省终端设备的资源。
通过实施本公开实施例，终端设备在接收网络设备指示的传输阈值的取值之后，进而在当前的preamble传输次数大于传输阈值、且满足随机接入过程未完成、当前RA类型为非2 step RA回退的4 step RA、下行路损参考点RSRP小于接收阈值、及contention resolution失败的情况下，开启msg3 repetition模式，从而实现覆盖增强的效果。
请参见图8，图8以2-step RA期间开启Msg3 repetition模式为例，对本公开提供的基于四步随机接入的第三条消息重复的覆盖增强方法进行说明。图8是本公开实施例提供的一种基于四步随机接入的第三条消息重复的覆盖增强方法的流程示意图,该方法由终端设备执行。如图8所示，该方法可以包括但不限于如下步骤：
步骤81，接收第一指示信息，其中，第一指示信息，用于指示传输阈值的取值。
需要说明的是，对于2-step RA期间开启Msg3 repetition模式的情况，本公开实施例中，第一指示信息指示的传输阈值的取值可以为Msg1的回退最大传输次数(msg1-TransMax-fallback)。
其中，步骤81的具体实现形式，可参照本公开中其他各实施例中的详细步骤，此处不再详细描述。
步骤82，在当前的preamble传输次数大于传输阈值、且RA过程满足随机接入过程未完成、当前RA类型为2 step RA、下行路损参考点RSRP小于接收阈值的情况下，开启msg3 repetition模式。
本公开实施例中，终端设备在接收MsgB阶段之后，或者在contention resolution失败之后，确定RA过程未完成，且当前的RA类型为2 step RA，且终端设备应用了msgA-TransMax-CE，则在PREAMBLE_TRANSMISSION_COUNTER＝msgA-TransMax-CE+1时，终端设备选择4-step RA，并开启msg3 repetition模式。
可选的，终端设备在选择4-step RA开启msg3 repetition之前，还可以进一步判断下行路损参考点RSRP是否小于接收阈值，在下行路损参考点RSRP小于接收阈值的情况下，开启msg3 repetition模式。其中，接收阈值可以为msg3 repetition的RSRP门限(rsrp-Threshold-msg3 repetition)，本公开对此不做限定。
可选的，终端设备可以在确定RA过程未完成之后，可以先判断是否已经开启msg3 repetition模式，进而在未开启msg3 repetition模式的情况下，进一步判断是否满足当前RA类型为2 step RA、下行路损参考点RSRP小于接收阈值、及当前的preamble传输次数大于msgA-TransMax-CE等预设条件。从而，可以节省终端设备的资源。
通过实施本公开实施例，终端设备在接收网络设备指示的传输阈值的取值之后，进而在当前的preamble传输次数大于传输阈值、且满足随随机接入过程未完成、当前RA类型为2 step RA、下行路损参考点RSRP小于接收阈值的情况下，开启msg3 repetition模式，从而实现覆盖增强的效果。
请参见图9，图9是本公开实施例提供的一种基于四步随机接入的第三条消息重复的覆盖增强方法的流程示意图,该方法由终端设备执行。如图9所示，该方法可以包括但不限于如下步骤：
步骤91，发送第二指示信息，其中，第二指示信息用于指示终端设备是否支持msg3 repetition的能力。
可选的，终端设备是否支持msg3 repetition的能力可以包括以下至少一项：
终端设备在从2 step RA回退至4 step RA的情况下，是否支持msg3 repetition的能力；
终端设备在每个频段是否支持msg3 repetition的能力。
可选的，终端设备可以通过第二指示信息向网络设备上报的终端设备是否在所有频段支持msg3 repetition的能力。或者，也可以通过第二指示信息，向网络设备上报，在每个频段是否支持msg3 repetition的能力。即，第二指示信息中，可以包括每个频段的标识及每个频段是否支持msg3 repetition的能力，本公开对此不做限定。
比如，终端设备可以通过一条第二指示信息，指示终端设备在频率范围1(frequency range，FR1)频段和频率范围2(frequency range，FR2)频段是否支持msg3 repetition的能力，或者，也可以分别通过不同的第二指示信息，指示FR1频段，FR2-1频段、FR2-2频段是否支持msg3 repetition的能力。本公开对此不做限定。
其中，FR1频段为410MHz–7125MHz；FR2频段可以为24250MHz–52600MHz，或者FR2频段也可以为24250MHz–71000MHz。若FR2频段为24250MHz–71000MHz，则可以将FR2频段分为FR2-1频段及FR2-2频段，其中，FR2-1频段为24250MHz–52600MHz；FR2-2频段为52600MHz-71000MHz。
步骤92，接收第一指示信息，其中，第一指示信息，用于指示传输阈值的取值。
步骤93，响应于当前的preamble传输次数大于传输阈值、且RA过程满足预设条件，开启msg3 repetition模式。
其中，步骤92及步骤93的具体实现形式，可参照本公开中其他各实施例中的详细步骤，此处不再详细描述。
可以理解的是，本公开实施例中，终端设备先向网络设备发送自己是否支持msg3 repetition的能力，进而网络设备可以在终端设备支持msg3 repetition的情况下，向终端设备指示传输阈值，从而节省了网络设备的资源，及信道资源。
通过实施本公开实施例，终端设备先向网络设备指示终端设备是否支持msg3 repetition的能力，之后接收网络设备指示的传输阈值的取值，最后在当前的preamble传输次数大于传输阈值、且RA过程满足预设条件的情况下，开启msg3 repetition模式。由此，在终端设备支持msg3 repetition、当前的preamble传输次数大于传输阈值、且RA过程满足预设条件的情况下，开启msg3 repetition模式，从而不仅实现了覆盖增强的效果，还节省了资源。
请参见图10，图10是本公开实施例提供的一种基于四步随机接入的第三条消息重复的覆盖增强方法的流程示意图,该方法由网络设备执行。如图10所示，该方法可以包括但不限于如下步骤：
步骤101，响应于当前接收的终端设备发送的前导码preamble传输次数大于传输阈值、且RA过程满足预设条件，确定终端设备开启了第三条消息msg3重复repetition模式。
可选的，当前的前导码preamble传输次数大于传输阈值，可以为以下任一项：
两步2 step随机接入RA过程中preamble传输次数大于消息A MsgA的最大传输次数(msgA-TransMax)；
两步2 step RA过程中preamble传输次数大于消息A MsgA的回退最大传输次数(msgA-TransMax-CE)；
四步4 step RA过程中preamble传输次数大于第一条消息Msg1的最大传输次数(msg1-TransMax)；
四步4 step RA过程中preamble传输次数大于Msg1的回退最大传输次数(msg1-TransMax-fallback)；
RA过程中preamble传输次数大于MsgA的最大传输次数与第一条消息Msg1的最大传输次数的和。
可以理解的是，RA过程可以包括2 step RA及4 step RA，即，2 step RA及4 step RA过程中preamble总共的传输次数需大于MsgA的最大传输次数与Msg1的最大传输次数的和。
可选的，预设条件可以包括以下至少一项：
随机接入过程未完成；
当前RA类型为2 step RA；
当前RA类型为非2 step RA回退的4 step RA；
竞争解决contention resolution失败；
当前RA类型为由2 step RA回退的4 step RA；
下行路损参考点参考信号接收功率(Reference Signal Receiving Power，RSRP)小于接收阈值。
通过实施本公开实施例，网络设备可以在当前接收的终端设备发送的前导码preamble传输次数大于传输阈值、且RA过程满足预设条件，确定终端设备开启了第三条消息msg3重复repetition模式，从而网络设备可以基于终端设备重复发送的msg3，与终端设备建立连接，进而实现覆盖增强的效果。
请参见图11，图11以不支持2-step RA回退fallback到4-step RA后开启Msg3 repetition模式为例，对本公开提供的基于四步随机接入的第三条消息重复的覆盖增强方法进行说明。图11是本公开实施例提供的一种基于四步随机接入的第三条消息重复的覆盖增强方法的流程示意图,该方法由网络设备执行。如图11所示，该方法可以包括但不限于如下步骤：
步骤111，发送第一指示信息，其中，第一指示信息，用于指示传输阈值的取值。
需要说明的是，对于不支持2-step RA回退fallback到4-step RA后启动Msg3 repetition的情况，本公开实施例中，网络设备发送的第一指示信息指示的传输阈值的取值可以为Msg1的最大传输次数。
可选的，网络设备可以通过广播消息，接收第一指示信息；或者，网络设备也通过无线资源控制RRC消息，接收第一指示信息。
可选的，广播消息可以为SIB1(System Information Block Type1)消息,本公开对此不做限定。
可选的，第一指示信息，还可以用于指示与传输阈值对应的小区标识。即，仅当终端设备待接入的小区为小区标识指示的小区的情况下，才能基于该传输阈值，确定是否开启msg3 repetition模式。
或者，与传输阈值对应的带宽部分(BandWidth Part，BWP)标识。即，仅当终端设备待使用的带宽部分为带宽部分标识指示的带宽部分的情况下，才能基于该传输阈值，确定是否开启msg3 repetition 模式。
步骤112，在当前接收的终端设备发送的preamble传输次数大于传输阈值、且RA过程满足随机接入过程未完成、当前RA类型为非2 step RA回退的4 step RA、及下行路损参考点RSRP小于接收阈值的情况下，确定终端设备开启了msg3 repetition模式。
本公开实施例中，若网络设备向终端设备发送的RAR之后，确定RA过程未完成，且当前的4-step RA不是由2-step RA回退fallback回来，且preamble传输次数大于第一指示信息指示的msg1-TransMax，即PREAMBLE_TRANSMISSION_COUNTER＝Msg1-TransMax+1，且下行路损参考点RSRP小于接收阈值的情况下，确定终端设备即可开启msg3 repetition模式。
其中，接收阈值可以为msg3 repetition的RSRP门限(rsrp-Threshold-msg3 repetition)，本公开对此不做限定。
可选的，网络设备在确定4-step RA过程未完成之后，可以先判断终端设备是否已经开启msg3 repetition模式，进而在终端设备未开启msg3 repetition模式的情况下，进一步判断是否满足当前RA类型为非2 step RA回退的4 step RA、及下行路损参考点RSRP小于接收阈值、及当前的preamble传输次数大于msg1-TransMax预设条件。从而，可以节省网络设备的资源。
通过实施本公开实施例，网络设备先向终端设备发送用于指示的传输阈值的取值的第一指示信息，之后在当前接收的终端设备发送的preamble传输次数大于传输阈值、且满足随机接入过程未完成、当前RA类型为非2 step RA回退的4 step RA、及下行路损参考点RSRP小于接收阈值的情况下，确定终端设备开启了msg3 repetition模式，从而网络设备可以基于终端设备重复发送的msg3，与终端设备建立连接，进而实现覆盖增强的效果。
请参见图12，图12以不支持2-step RA回退fallback到4-step RA后开启Msg3 repetition模式为例，对本公开提供的基于四步随机接入的第三条消息重复的覆盖增强方法进行说明。图12是本公开实施例提供的一种基于四步随机接入的第三条消息重复的覆盖增强方法的流程示意图,该方法由网络设备执行。如图12所示，该方法可以包括但不限于如下步骤：
步骤121，发送第一指示信息，其中，第一指示信息，用于指示传输阈值的取值。
需要说明的是，对于不支持2-step RA回退fallback到4-step RA后启动Msg3 repetition的情况，本公开实施例中，第一指示信息指示的传输阈值的取值可以为Msg1的最大传输次数。
其中，步骤121的具体实现形式，可参照本公开中其他各实施例中的详细步骤，此处不再详细描述。
步骤122，在当前接收的终端设备发送的preamble传输次数大于传输阈值、且RA过程满足随机接入过程未完成、当前RA类型为非2 step RA回退的4 step RA、下行路损参考点RSRP小于接收阈值、及contention resolution失败的情况下，确定终端设备开启了msg3 repetition模式。
本公开实施例中，在contention resolution失败之后，若RA过程未完成，且当前的4-step RA不是由2-step RA回退fallback回来，且preamble传输次数大于第一指示信息指示的msg1-TransMax，即PREAMBLE_TRANSMISSION_COUNTER＝Msg1-TransMax+1，且下行路损参考点RSRP小于接收阈值，网络设备可以确定终端设备开启了msg3 repetition模式。
可选的，网络设备在确定4-step RA过程未完成之后，可以先判断终端设备是否已经开启msg3 repetition模式，进而在终端设备未开启msg3 repetition模式的情况下，进一步判断是否满足当前RA类型为非2 step RA回退的4 step RA、及下行路损参考点RSRP小于接收阈值、及当前的preamble传输次数大于msg1-TransMax预设条件。从而，可以节省网络设备的资源。
通过实施本公开实施例，网络设备先向终端设备发送用于指示的传输阈值的取值的第一指示信息，之后在当前接收的终端设备发送的preamble传输次数大于传输阈值、且满足随机接入过程未完成、当前RA类型为非2 step RA回退的4 step RA、下行路损参考点RSRP小于接收阈值、及contention resolution失败的情况下，确定终端设备开启了msg3 repetition模式，从而网络设备可以基于终端设备重复发送的msg3，与终端设备建立连接，进而实现覆盖增强的效果。
请参见图13，图13以支持2-step RA回退fallback到4-step RA后开启Msg3 repetition模式为例，对本公开提供的基于四步随机接入的第三条消息重复的覆盖增强方法进行说明。图13是本公开实施例提供的一种基于四步随机接入的第三条消息重复的覆盖增强方法的流程示意图,该方法由网络设备执行。如图13所示，该方法可以包括但不限于如下步骤：
步骤131，发送第一指示信息，其中，第一指示信息，用于指示传输阈值的取值。
需要说明的是，对于支持2-step RA回退fallback到4-step RA后启动Msg3 repetition的情况，本公开实施例中，第一指示信息指示的传输阈值的取值可以为MsgA的最大传输次数与Msg1的最大传输 次数的和。
其中，步骤131的具体实现形式，可参照本公开中其他各实施例中的详细步骤，此处不再详细描述。
步骤132，在当前接收的终端设备发送的preamble传输次数大于传输阈值、且RA过程满足随机接入过程未完成、当前RA类型为非2 step RA回退的4 step RA、下行路损参考点RSRP小于接收阈值、及contention resolution失败的情况下，确定终端设备开启了msg3 repetition模式。
本公开实施例中，网络设备在发送RAR阶段之后，或者在contention resolution失败之后，确定RA过程未完成，且当前的RA类型为4 step RA，且当前的4-step RA是由2-step RA fallback回来，且终端设备应用了msg1-TransMax，则在PREAMBLE_TRANSMISSION_COUNTER＝msg1-TransMax+msgA-TransMax+1，且下行路损参考点RSRP小于接收阈值的情况下，可以确定终端设备开启了msg3 repetition模式。
可选的，网络设备可以在确定4-step RA过程未完成之后，可以先判断终端设备是否已经开启msg3 repetition模式，进而在终端设备未开启msg3 repetition模式的情况下，进一步判断是否满足当前RA类型为非2 step RA回退的4 step RA、下行路损参考点RSRP小于接收阈值、及当前的preamble传输次数大于msg1-TransMax与msgA-TransMax的和等预设条件。从而，可以节省网络设备的资源。
通过实施本公开实施例，网络设备先向终端设备发送用于指示的传输阈值的取值的第一指示信息，之后在当前接收的终端设备发送的preamble传输次数大于传输阈值、且满足随机接入过程未完成、当前RA类型为非2 step RA回退的4 step RA、下行路损参考点RSRP小于接收阈值、及contention resolution失败的情况下，确定终端设备开启了msg3 repetition模式，从而网络设备可以基于终端设备重复发送的msg3，与终端设备建立连接，进而实现覆盖增强的效果。
请参见图14，图14以支持2-step RA回退fallback到4-step RA后开启Msg3 repetition模式为例，对本公开提供的基于四步随机接入的第三条消息重复的覆盖增强方法进行说明。图14是本公开实施例提供的一种基于四步随机接入的第三条消息重复的覆盖增强方法的流程示意图,该方法由网络设备执行。如图14所示，该方法可以包括但不限于如下步骤：
步骤141，发送第一指示信息，其中，第一指示信息，用于指示传输阈值的取值。
需要说明的是，对于支持2-step RA fallback到4-step RA后启动Msg3 repetition的情况，本公开实施例中，第一指示信息指示的传输阈值的取值可以为Msg1的回退最大传输次数(msg1-TransMax-fallback)。
其中，步骤141的具体实现形式，可参照本公开中其他各实施例中的详细步骤，此处不再详细描述。
步骤142，在当前接收的终端设备发送的preamble传输次数大于传输阈值、且RA过程满足随机接入过程未完成、当前RA类型为非2 step RA回退的4 step RA、下行路损参考点RSRP小于接收阈值、及contention resolution失败的情况下，确定终端设备开启了msg3 repetition模式。
本公开实施例中，网络设备在发送RAR阶段之后，或者在contention resolution失败之后，确定RA过程未完成，且当前的RA类型为4 step RA，且当前的4-step RA是由2-step RA fallback回来，且终端设备应用了的msg1-TransMax-fallback，则在PREAMBLE_TRANSMISSION_COUNTER＝msg1-TransMax-fallback+1，且下行路损参考点RSRP小于接收阈值的情况下，确定终端设备开启了msg3 repetition模式。
可选的，网络设备可以在确定4-step RA过程未完成之后，可以先判断是否已经开启msg3 repetition模式，进而在未开启msg3 repetition模式的情况下，进一步判断是否满足当前RA类型为非2 step RA回退的4 step RA、下行路损参考点RSRP小于接收阈值、及当前的preamble传输次数大于msg1-TransMax-fallback等条件。从而，可以节省网络设备的资源。
通过实施本公开实施例，网络设备先向终端设备发送用于指示的传输阈值的取值的第一指示信息，之后在当前接收的终端设备发送的preamble传输次数大于传输阈值、且满足随机接入过程未完成、当前RA类型为非2 step RA回退的4 step RA、下行路损参考点RSRP小于接收阈值、及contention resolution失败的情况下，确定终端设备开启了msg3 repetition模式，从而网络设备可以基于终端设备重复发送的msg3，与终端设备建立连接，进而实现覆盖增强的效果。
请参见图15，图15以支持2-step RA回退fallback到4-step RA后开启Msg3 repetition模式为例，对本公开提供的基于四步随机接入的第三条消息重复的覆盖增强方法进行说明。图15是本公开实施例提供的一种基于四步随机接入的第三条消息重复的覆盖增强方法的流程示意图,该方法由网络设备执行。如图15所示，该方法可以包括但不限于如下步骤：
步骤151，发送第一指示信息，其中，第一指示信息，用于指示传输阈值的取值。
需要说明的是，对于支持2-step RA fallback到4-step RA后启动Msg3 repetition的情况，本公开实施例中，第一指示信息指示的传输阈值的取值可以为MsgA的最大传输次数与Msg1的最大传输次数的和。
其中，步骤151的具体实现形式，可参照本公开中其他各实施例中的详细步骤，此处不再详细描述。
步骤152，在当前接收的终端设备发送的preamble传输次数大于传输阈值、且RA过程满足随机接入过程未完成、当前RA类型为非2 step RA回退的4 step RA、下行路损参考点RSRP小于接收阈值、及contention resolution失败的情况下，确定终端设备开启了msg3 repetition模式。
本公开实施例中，网络设备在发送RAR阶段之后，或者在contentionresolution失败之后，确定RA过程未完成，且当前的RA类型为4 step RA，且当前的4-step RA是由2-step RA fallback回来，且终端设备应用了msg1-TransMax-fallback，则在PREAMBLE_TRANSMISSION_COUNTER＝msgA-TransMax+msg1-TransMax-fallback+1，且下行路损参考点RSRP小于接收阈值的情况下，确定终端设备开启了msg3 repetition模式。
可选的，网络设备可以在确定4-step RA过程未完成之后，可以先判断是否已经开启msg3 repetition模式，进而在未开启msg3 repetition模式的情况下，进一步判断是否满足当前RA类型为非2 step RA回退的4 step RA、下行路损参考点RSRP小于接收阈值、及当前的preamble传输次数大于msgA-TransMax与msg1-TransMax的和等预设条件。从而，可以节省网络设备的资源。
通过实施本公开实施例，网络设备先向终端设备发送用于指示的传输阈值的取值的第一指示信息，之后在当前接收的终端设备发送的preamble传输次数大于传输阈值、且满足随机接入过程未完成、当前RA类型为非2 step RA回退的4 step RA、下行路损参考点RSRP小于接收阈值、及contention resolution失败的情况下，确定终端设备开启了msg3 repetition模式，从而网络设备可以基于终端设备重复发送的msg3，与终端设备建立连接，进而实现覆盖增强的效果。
请参见图16，图16以2-step RA期间开启Msg3 repetition模式为例，对本公开提供的基于四步随机接入的第三条消息重复的覆盖增强方法进行说明。图16是本公开实施例提供的一种基于四步随机接入的第三条消息重复的覆盖增强方法的流程示意图,该方法由网络设备执行。如图16所示，该方法可以包括但不限于如下步骤：
步骤161，发送第一指示信息，其中，第一指示信息，用于指示传输阈值的取值。
需要说明的是，对于2-step RA期间开启Msg3 repetition模式的情况，本公开实施例中，第一指示信息指示的传输阈值的取值可以为Msg1的回退最大传输次数(msg1-TransMax-fallback)。
其中，步骤161的具体实现形式，可参照本公开中其他各实施例中的详细步骤，此处不再详细描述。
步骤162，在当前接收的终端设备发送的preamble传输次数大于传输阈值、且RA过程满足随机接入过程未完成、当前RA类型为2 step RA、下行路损参考点RSRP小于接收阈值的情况下，确定终端设备开启了msg3 repetition模式。
本公开实施例中，网络设备在发送MsgB阶段之后，或者在contention resolution失败之后，确定RA过程未完成，且当前的RA类型为2 step RA，且终端设备应用了msgA-TransMax-CE，则在PREAMBLE_TRANSMISSION_COUNTER＝msgA-TransMax-CE+1，且下行路损参考点RSRP小于接收阈值的情况下，确定终端设备选择4-step RA，并开启了msg3 repetition模式。
可选的，网络设备可以在确定RA过程未完成之后，可以先判断是否已经开启msg3 repetition模式，进而在未开启msg3 repetition模式的情况下，进一步判断是否满足当前RA类型为2 step RA、下行路损参考点RSRP小于接收阈值、及当前的preamble传输次数大于msgA-TransMax-CE等预设条件。从而，可以节省网络设备的资源。
通过实施本公开实施例，网络设备先向终端设备发送用于指示的传输阈值的取值的第一指示信息，之后在当前接收的终端设备发送的preamble传输次数大于传输阈值、且满足随机接入过程未完成、当前RA类型为2 step RA、下行路损参考点RSRP小于接收阈值的情况下，确定终端设备开启了msg3 repetition模式，从而网络设备可以基于终端设备重复发送的msg3，与终端设备建立连接，进而实现覆盖增强的效果。
请参见图17，图17是本公开实施例提供的一种基于四步随机接入的第三条消息重复的覆盖增强方法的流程示意图,该方法由网络设备执行。如图17所示，该方法可以包括但不限于如下步骤：
步骤171，接收第二指示信息，其中，第二指示信息用于指示终端设备是否支持msg3 repetition的能力。
可选的，终端设备是否支持msg3 repetition的能力可以包括以下至少一项：
终端设备在从2 step RA回退至4 step RA的情况下，是否支持msg3 repetition的能力；
终端设备在每个频段是否支持msg3 repetition的能力。
可选的，第二指示信息是由终端设备发送给网络设备的。终端设备可以通过第二指示信息向网络设备上报的终端设备是否在所有频段支持msg3 repetition的能力。或者，也可以通过第二指示信息，向网络设备上报，在每个频段是否支持msg3 repetition的能力。即，第二指示信息中，可以包括每个频段的标识及每个频段是否支持msg3 repetition的能力，本公开对此不做限定。
比如，终端设备可以通过一条第二指示信息，指示终端设备在频率范围1(frequency range，FR1)频段和频率范围2(frequency range，FR2)频段是否支持msg3 repetition的能力，或者，也可以分别通过不同的第二指示信息，指示FR1频段，FR2-1频段、FR2-2频段是否支持msg3 repetition的能力。本公开对此不做限定。
其中，FR1频段为410MHz–7125MHz；FR2频段可以为24250MHz–52600MHz，或者FR2频段也可以为24250MHz–71000MHz。若FR2频段为24250MHz–71000MHz，则可以将FR2频段分为FR2-1频段及FR2-2频段，其中，FR2-1频段为24250MHz–52600MHz；FR2-2频段为52600MHz-71000MHz。
步骤172，发送第一指示信息，其中，第一指示信息，用于指示传输阈值的取值。
步骤173，响应于当前接收的终端设备发送的preamble传输次数大于传输阈值、且RA过程满足预设条件，确定终端设备开启了msg3 repetition模式。
其中，步骤172及步骤173的具体实现形式，可参照本公开中其他各实施例中的详细步骤，此处不再详细描述。
可以理解的是，本公开实施例中，网络设备先接收终端设备发送的终端设备是否支持msg3 repetition的能力，进而网络设备可以在终端设备支持msg3 repetition的情况下，向终端设备指示传输阈值，从而节省了网络设备的资源，及信道资源。
通过实施本公开实施例，网络设备先接收终端设备发送的用于指示终端设备是否支持msg3 repetition的能力的第二指示信息，之后可以在终端设备支持msg3 repetition的情况下，通过第一指示信息向终端设备指示的传输阈值的取值，最后在当前接收的preamble传输次数大于传输阈值、且RA过程满足预设条件的情况下，确定终端设备开启了msg3 repetition模式。由此，在终端设备支持msg3 repetition、当前接收的preamble传输次数大于传输阈值、且RA过程预设条件的情况下，确定终端设备开启了msg3 repetition模式，从而网络设备可以基于终端设备重复发送的msg3，与终端设备建立连接，不仅实现覆盖增强的效果，还节省了资源。
上述本公开提供的实施例中，分别从网络设备、终端设备的角度对本公开实施例提供的方法进行了介绍。为了实现上述本公开实施例提供的方法中的各功能，网络设备和终端设备可以包括硬件结构、软件模块，以硬件结构、软件模块、或硬件结构加软件模块的形式来实现上述各功能。上述各功能中的某个功能可以以硬件结构、软件模块、或者硬件结构加软件模块的方式来执行。
请参见图18，为本公开实施例提供的一种通信装置180的结构示意图。图18所示的通信装置180可包括处理模块1801和收发模块1802。
收发模块1802可包括发送模块和/或接收模块，发送模块用于实现发送功能，接收模块用于实现接收功能，收发模块1802可以实现发送功能和/或接收功能。
可以理解的是，通信装置180可以是终端设备，也可以是终端设备中的装置，还可以是能够与终端设备匹配使用的装置。
通信装置180，在终端设备侧，该装置，包括：
处理模块1801，用于响应于当前的前导码preamble传输次数大于传输阈值、且随机接入RA过程满足预设条件，开启第三条消息msg3重复repetition模式。
可选的，当前的前导码preamble传输次数大于传输阈值，为以下任一项：
两步2 step RA过程中preamble传输次数大于消息A MsgA的最大传输次数；
两步2 step RA过程中preamble传输次数大于消息A MsgA的回退最大传输次数；
四步4 step RA过程中preamble传输次数大于第一条消息Msg1的最大传输次数；
四步4 step RA过程中preamble传输次数大于Msg1的回退最大传输次数；
RA过程中preamble传输次数大于MsgA的最大传输次数与第一条消息Msg1的最大传输次数的和。
可选的，还包括：
收发模块1802，用于接收第一指示信息，其中，第一指示信息，用于指示传输阈值的取值。
可选的，收发模块1802，具体用于：
通过广播消息，接收第一指示信息；
或者，
通过无线资源控制RRC消息，接收第一指示信息。
可选的，第一指示信息，还用于指示与传输阈值对应的小区标识，或者，与传输阈值对应的带宽部分BWP标识。
可选的，预设条件包括以下至少一项：
随机接入过程未完成；
当前RA类型为2 step RA；
当前RA类型为非2 step RA回退的4 step RA；
竞争解决contention resolution失败；
当前RA类型为由2 step RA回退的4 step RA；
下行路损参考点参考信号接收功率RSRP小于接收阈值。
可选的，收发模块1802，还具体用于：
发送第二指示信息，其中，第二指示信息用于指示终端设备是否支持msg3 repetition的能力。
可选的，终端设备是否支持msg3重复的能力包括以下至少一项：
终端设备在从2 step RA回退至4 step RA的情况下，是否支持msg3 repetition的能力；
终端设备在每个频段是否支持msg3 repetition的能力。
本公开提供的通信装置，终端设备可以在当前的preamble传输次数大于传输阈值、且随机接入RA过程满足预设条件的情况下，开启第三条消息msg3 repetition模式，从而实现覆盖增强的效果。
可以理解的是，通信装置180可以是网络设备，也可以是网络设备中的装置，还可以是能够与网络设备匹配使用的装置。
通信装置180，在网络设备侧，该装置，包括：
处理模块1801，用于响应于当前接收的终端设备发送的前导码preamble传输次数大于传输阈值、且随机接入RA过程满足预设条件，确定终端设备开启了第三条消息msg3重复repetition模式。
可选的，当前的前导码preamble传输次数大于传输阈值，为以下任一项：
两步2 step RA过程中preamble传输次数大于消息A MsgA的最大传输次数；
两步2 step RA过程中preamble传输次数大于消息A MsgA的回退最大传输次数；
四步4 step RA过程中preamble传输次数大于第一条消息Msg1的最大传输次数；
四步4 step RA过程中preamble传输次数大于Msg1的回退最大传输次数；
RA过程中preamble传输次数大于MsgA的最大传输次数与第一条消息Msg1的最大传输次数的和。
可选的，还包括：
收发模块1802，用于发送第一指示信息，其中，第一指示信息，用于指示传输阈值的取值。
可选的，收发模块1802，具体用于：
通过广播消息，发送第一指示信息；
或者，
通过无线资源控制RRC消息，发送第一指示信息。
可选的，第一指示信息，还用于指示与传输阈值对应的小区标识，或者，与传输阈值对应的带宽部分BWP标识。
可选的，预设条件包括以下至少一项：
随机接入过程未完成；
当前RA类型为2 step RA；
当前RA类型为非2 step RA回退的4 step RA；
竞争解决contention resolution失败；
当前RA类型为由2 step RA回退的4 step RA；
下行路损参考点参考信号接收功率RSRP小于接收阈值。
可选的，收发模块1802，还具体用于：
接收第二指示信息，其中，第二指示信息用于指示终端设备是否支持msg3 repetition的能力。
可选的，终端设备是否支持msg3 repetition的能力包括以下至少一项：
终端设备在从2 step RA回退至4 step RA的情况下，是否支持msg3 repetition的能力；
终端设备在每个频段是否支持msg3 repetition的能力。
本公开提供的通信装置，网络设备可以在当前接收的终端设备发送的前导码preamble传输次数大于传输阈值、且RA过程满足预设条件，确定终端设备开启了第三条消息msg3重复repetition模式，从而网络设备可以基于终端设备重复发送的msg3，与终端设备建立连接，进而实现覆盖增强的效果。
请参见图19，图19是本公开实施例提供的另一种通信装置190的结构示意图。通信装置190可以是网络设备，也可以是终端设备，也可以是支持网络设备实现上述方法的芯片、芯片系统、或处理器等，还可以是支持终端设备实现上述方法的芯片、芯片系统、或处理器等。该装置可用于实现上述方法实施例中描述的方法，具体可以参见上述方法实施例中的说明。
通信装置190可以包括一个或多个处理器1901。处理器1901可以是通用处理器或者专用处理器等。例如可以是基带处理器或中央处理器。基带处理器可以用于对通信协议以及通信数据进行处理，中央处理器可以用于对通信装置(如，基站、基带芯片，终端设备、终端设备芯片，DU或CU等)进行控制，执行计算机程序，处理计算机程序的数据。
可选的，通信装置190中还可以包括一个或多个存储器1902，其上可以存有计算机程序1904，处理器1901执行所述计算机程序1904，以使得通信装置190执行上述方法实施例中描述的方法。可选的，所述存储器1902中还可以存储有数据。通信装置190和存储器1902可以单独设置，也可以集成在一起。
可选的，通信装置190还可以包括收发器1905、天线1906。收发器1905可以称为收发单元、收发机、或收发电路等，用于实现收发功能。收发器1905可以包括接收器和发送器，接收器可以称为接收机或接收电路等，用于实现接收功能；发送器可以称为发送机或发送电路等，用于实现发送功能。
可选的，通信装置190中还可以包括一个或多个接口电路1907。接口电路1907用于接收代码指令并传输至处理器1901。处理器1901运行所述代码指令以使通信装置190执行上述方法实施例中描述的方法。
通信装置190为终端设备：处理器1901用于执行图2中的步骤21；图3中的步骤32；图4中的步骤42；图5中的步骤52等等。收发器1905用于执行图3中的步骤31；图4中的步骤41；或图5中的步骤51等等。
通信装置190为网络设备：处理器1901用于执行图10中的步骤101；图11中的步骤112；或图12中的步骤122等等；收发器1905用于执行图11中的步骤111；图12中的步骤121；图13中的步骤131；或图14中的步骤141等等。
在一种实现方式中，处理器1901中可以包括用于实现接收和发送功能的收发器。例如该收发器可以是收发电路，或者是接口，或者是接口电路。用于实现接收和发送功能的收发电路、接口或接口电路可以是分开的，也可以集成在一起。上述收发电路、接口或接口电路可以用于代码/数据的读写，或者，上述收发电路、接口或接口电路可以用于信号的传输或传递。
在一种实现方式中，处理器1901可以存有计算机程序1903，计算机程序1903在处理器1901上运行，可使得通信装置190执行上述方法实施例中描述的方法。计算机程序1903可能固化在处理器1901中，该种情况下，处理器1901可能由硬件实现。
在一种实现方式中，通信装置190可以包括电路，所述电路可以实现前述方法实施例中发送或接收或者通信的功能。本公开中描述的处理器和收发器可实现在集成电路(integrated circuit，IC)、模拟IC、射频集成电路RFIC、混合信号IC、专用集成电路(application specific integrated circuit，ASIC)、印刷电路板(printed circuit board，PCB)、电子设备等上。该处理器和收发器也可以用各种IC工艺技术来制造，例如互补金属氧化物半导体(complementary metal oxide semiconductor，CMOS)、N型金属氧化物半导体(nMetal-oxide-semiconductor，NMOS)、P型金属氧化物半导体(positive channel metal oxide semiconductor，PMOS)、双极结型晶体管(bipolar junction transistor，BJT)、双极CMOS(BiCMOS)、硅锗(SiGe)、砷化镓(GaAs)等。
以上实施例描述中的通信装置可以是网络设备或者终端设备，但本公开中描述的通信装置的范围并不限于此，而且通信装置的结构可以不受图19的限制。通信装置可以是独立的设备或者可以是较大设备的一部分。例如所述通信装置可以是：
(1)独立的集成电路IC，或芯片，或，芯片系统或子系统；
(2)具有一个或多个IC的集合，可选的，该IC集合也可以包括用于存储数据，计算机程序的存储部件；
(3)ASIC，例如调制解调器(Modem)；
(4)可嵌入在其他设备内的模块；
(5)接收机、终端设备、智能终端设备、蜂窝电话、无线设备、手持机、移动单元、车载设备、网络设备、云设备、人工智能设备等等；
(6)其他等等。
对于通信装置可以是芯片或芯片系统的情况，可参见图20所示的芯片的结构示意图。图20所示的芯片包括处理器2001和接口2002。其中，处理器2001的数量可以是一个或多个，接口2002的数量可以是多个。
对于芯片用于实现本公开实施例中终端设备的功能的情况：
处理器2001，用于执行图2中的步骤21；图3中的步骤32；图4中的步骤42；图5中的步骤52等等。
接口2002，用于执行图3中的步骤31；图4中的步骤41；或图5中的步骤51等等。
对于芯片用于实现本公开实施例中网络设备的功能的情况：
处理器2001，用于执行图10中的步骤101；图11中的步骤112；或图12中的步骤122等等。
接口2002，用于执行图11中的步骤111；图12中的步骤121；图13中的步骤131；或图14中的步骤141等等。
可选的，芯片还包括存储器2003，存储器2003用于存储必要的计算机程序和数据。
本领域技术人员还可以了解到本公开实施例列出的各种说明性逻辑块(illustrative logical block)和步骤(step)可以通过电子硬件、电脑软件，或两者的结合进行实现。这样的功能是通过硬件还是软件来实现取决于特定的应用和整个系统的设计要求。本领域技术人员可以对于每种特定的应用，可以使用各种方法实现所述的功能，但这种实现不应被理解为超出本公开实施例保护的范围。
本公开实施例还提供一种通信系统，该系统包括前述图18实施例中作为终端设备的通信装置和作为网络设备的通信装置，或者，该系统包括前述图19实施例中作为终端设备的通信装置和作为网络设备的通信装置。
本公开还提供一种计算机可读存储介质，其上存储有指令，该指令被计算机执行时实现上述任一方法实施例的功能。
本公开还提供一种计算机程序产品，该计算机程序产品被计算机执行时实现上述任一方法实施例的功能。
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程序。在计算机上加载和执行所述计算机程序时，全部或部分地产生按照本公开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。所述计算机程序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，所述计算机程序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(digital subscriber line，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，高密度数字视频光盘(digital video disc，DVD))、或者半导体介质(例如，固态硬盘(solid state disk，SSD))等。
本领域普通技术人员可以理解：本公开中涉及的第一、第二等各种数字编号仅为描述方便进行的区分，并不用来限制本公开实施例的范围，也表示先后顺序。
本公开中的至少一个还可以描述为一个或多个，多个可以是两个、三个、四个或者更多个，本公开不做限制。在本公开实施例中，对于一种技术特征，通过“第一”、“第二”、“第三”、“A”、“B”、“C”和“D”等区分该种技术特征中的技术特征，该“第一”、“第二”、“第三”、“A”、“B”、“C”和“D”描述的技术特征间无先后顺序或者大小顺序。
应当理解，尽管在本申请实施例可能采用术语第一、第二、第三等来描述各种信息，但这些信息不应限于这些术语。这些术语仅用来将同一类型的信息彼此区分开。例如，在不脱离本申请实施例范围的情况下，第一信息也可以被称为第二信息，类似地，第二信息也可以被称为第一信息。如在此所使用的词语“如果”及“若”可以被解释成为“在……时”或“当……时”或“响应于确定”或“在……情况下”。
本公开中各表所示的对应关系可以被配置，也可以是预定义的。各表中的信息的取值仅仅是举例，可以配置为其他值，本公开并不限定。在配置信息与各参数的对应关系时，并不一定要求必须配置各表中示意出的所有对应关系。例如，本公开中的表格中，某些行示出的对应关系也可以不配置。又例如，可以基于上述表格做适当的变形调整，例如，拆分，合并等等。上述各表中标题示出参数的名称也可以采用通信装置可理解的其他名称，其参数的取值或表示方式也可以通信装置可理解的其他取值或表示方式。上述各表在实现时，也可以采用其他的数据结构，例如可以采用数组、队列、容器、栈、线性表、指针、链表、树、图、结构体、类、堆、散列表或哈希表等。
本公开中的预定义可以理解为定义、预先定义、存储、预存储、预协商、预配置、固化、或预烧制。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行， 取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本公开的范围。
进一步可以理解的是，本公开实施例中尽管在附图中以特定的顺序描述操作，但是不应将其理解为要求按照所示的特定顺序或是串行顺序来执行这些操作，或是要求执行全部所示的操作以得到期望的结果。在特定环境中，多任务和并行处理可能是有利的。
本领域技术人员在考虑说明书及实践这里公开的发明后，将容易想到本公开的其它实施方案。本申请旨在涵盖本公开的任何变型、用途或者适应性变化，这些变型、用途或者适应性变化遵循本公开的一般性原理并包括本公开未公开的本技术领域中的公知常识或惯用技术手段。说明书和实施例仅被视为示例性的，本公开的真正范围和精神由下面的权利要求指出。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
以上所述，仅为本公开的具体实施方式，但本公开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公开揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本公开的保护范围之内。因此，本公开的保护范围应以所述权利要求的保护范围为准。

Claims (26)

  1. 一种基于四步随机接入的第三条消息重复的覆盖增强方法，其特征在于，由终端设备执行，所述方法包括：
    响应于当前的前导码preamble传输次数大于传输阈值、且随机接入RA过程满足预设条件，开启第三条消息msg3重复repetition模式。
  2. 如权利要求1所述的方法，其特征在于，所述当前的前导码preamble传输次数大于传输阈值，为以下任一项：
    两步2 stepRA过程中preamble传输次数大于消息A MsgA的最大传输次数；
    两步2 step RA过程中preamble传输次数大于消息A MsgA的回退最大传输次数；
    四步4 step RA过程中preamble传输次数大于第一条消息Msg1的最大传输次数；
    四步4 step RA过程中preamble传输次数大于Msg1的回退最大传输次数；
    RA过程中preamble传输次数大于MsgA的最大传输次数与第一条消息Msg1的最大传输次数的和。
  3. 如权利要求1-2任一所述的方法，其特征在于，所述预设条件包括以下至少一项：
    随机接入过程未完成；
    当前RA类型为2 step RA；
    当前RA类型为非2 step RA回退的4 step RA；
    竞争解决contention resolution失败；
    当前RA类型为由2 step RA回退的4 step RA；
    下行路损参考点参考信号接收功率RSRP小于接收阈值。
  4. 如权利要求1-3任一所述的方法，其特征在于，还包括：
    发送第二指示信息，其中，所述第二指示信息用于指示所述终端设备是否支持msg3 repetition的能力。
  5. 如权利要求4所述的方法，其特征在于，所述终端设备是否支持msg3重复的能力包括以下至少一项：
    所述终端设备在从2 step RA回退至4 step RA的情况下，是否支持msg3 repetition的能力；
    所述终端设备在每个频段是否支持msg3 repetition的能力。
  6. 一种基于四步随机接入的第三条消息重复的覆盖增强方法，其特征在于，由网络设备执行，所述方法包括：
    响应于当前接收的终端设备发送的前导码preamble传输次数大于传输阈值、且随机接入RA过程满足预设条件，确定终端设备开启了第三条消息msg3重复repetition模式。
  7. 如权利要求6所述的方法，其特征在于，所述当前的前导码preamble传输次数大于传输阈值，为以下任一项：
    两步2 step随机接入RA过程中preamble传输次数大于消息A MsgA的最大传输次数；
    两步2 step RA过程中preamble传输次数大于消息A MsgA的回退最大传输次数；
    四步4 step RA过程中preamble传输次数大于第一条消息Msg1的最大传输次数；
    四步4 step RA过程中preamble传输次数大于Msg1的回退最大传输次数；
    RA过程中preamble传输次数大于MsgA的最大传输次数与第一条消息Msg1的最大传输次数的和。
  8. 如权利要求6-7任一所述的方法，其特征在于，所述预设条件包括以下至少一项：
    随机接入过程未完成；
    当前RA类型为2 step RA；
    当前RA类型为非2 step RA回退的4 step RA；
    竞争解决contention resolution失败；
    当前RA类型为由2 step RA回退的4 step RA；
    下行路损参考点参考信号接收功率RSRP小于接收阈值。
  9. 如权利要求6-8任一所述的方法，其特征在于，还包括：
    接收第二指示信息，其中，所述第二指示信息用于指示所述终端设备是否支持msg3 repetition的能力。
  10. 如权利要求9所述的方法，其特征在于，所述终端设备是否支持msg3 repetition的能力包括以下至少一项：
    所述终端设备在从2 step RA回退至4 step RA的情况下，是否支持msg3 repetition的能力；
    所述终端设备在每个频段是否支持msg3 repetition的能力。
  11. 一种通信装置，其特征在于，所述装置在终端设备侧，所述装置包括：
    处理模块，用于响应于当前的前导码preamble传输次数大于传输阈值、且随机接入RA过程满足预设条件，开启第三条消息msg3重复repetition模式。
  12. 如权利要求11所述的装置，其特征在于，所述当前的前导码preamble传输次数大于传输阈值，为以下任一项：
    两步2 step随机接入RA过程中preamble传输次数大于消息A MsgA的最大传输次数；
    两步2 step RA过程中preamble传输次数大于消息A MsgA的回退最大传输次数；
    四步4 step RA过程中preamble传输次数大于第一条消息Msg1的最大传输次数；
    四步4 step RA过程中preamble传输次数大于Msg1的回退最大传输次数；
    RA过程中preamble传输次数大于MsgA的最大传输次数与第一条消息Msg1的最大传输次数的和。
  13. 如权利要求11-12任一所述的装置，其特征在于，所述预设条件包括以下至少一项：
    随机接入过程未完成；
    当前RA类型为2 step RA；
    当前RA类型为非2 step RA回退的4 step RA；
    竞争解决contention resolution失败；
    当前RA类型为由2 step RA回退的4 step RA；
    下行路损参考点参考信号接收功率RSRP小于接收阈值。
  14. 如权利要求11-13任一所述的装置，其特征在于，所述收发模块，还具体用于：
    发送第二指示信息，其中，所述第二指示信息用于指示所述终端设备是否支持msg3 repetition的能力。
  15. 如权利要求14所述的装置，其特征在于，所述终端设备是否支持msg3重复的能力包括以下至少一项：
    所述终端设备在从2 step RA回退至4 step RA的情况下，是否支持msg3 repetition的能力；
    所述终端设备在每个频段是否支持msg3 repetition的能力。
  16. 一种通信装置，其特征在于，所述装置在网络设备侧，所述装置包括：
    处理模块，用于响应于当前接收的终端设备发送的前导码preamble传输次数大于传输阈值、且随机接入RA过程满足预设条件，确定终端设备开启了第三条消息msg3重复repetition模式。
  17. 如权利要求16所述的装置，其特征在于，所述当前的前导码preamble传输次数大于传输阈值，为以下任一项：
    两步2 step RA过程中preamble传输次数大于消息A MsgA的最大传输次数；
    两步2 step RA过程中preamble传输次数大于消息A MsgA的回退最大传输次数；
    四步4 step RA过程中preamble传输次数大于第一条消息Msg1的最大传输次数；
    四步4 step RA过程中preamble传输次数大于Msg1的回退最大传输次数；
    RA过程中preamble传输次数大于MsgA的最大传输次数与第一条消息Msg1的最大传输次数的和。
  18. 如权利要求16-17任一所述的装置，其特征在于，所述预设条件包括以下至少一项：
    随机接入过程未完成；
    当前RA类型为2 step RA；
    当前RA类型为非2 step RA回退的4 step RA；
    竞争解决contention resolution失败；
    当前RA类型为由2 step RA回退的4 step RA；
    下行路损参考点参考信号接收功率RSRP小于接收阈值。
  19. 如权利要求17-18任一所述的装置，其特征在于，所述收发模块，还具体用于：
    接收第二指示信息，其中，所述第二指示信息用于指示所述终端设备是否支持msg3 repetition的能力。
  20. 如权利要求19所述的装置，其特征在于，所述终端设备是否支持msg3 repetition的能力包括以下至少一项：
    所述终端设备在从2 step RA回退至4 step RA的情况下，是否支持msg3 repetition的能力；
    所述终端设备在每个频段是否支持msg3 repetition的能力。
  21. 一种通信装置，其特征在于，所述装置包括处理器和存储器，所述存储器中存储有计算机程序，所述处理器执行所述存储器中存储的计算机程序，以使所述装置执行如权利要求1至5中任一项所述的方法。
  22. 一种通信装置，其特征在于，所述装置包括处理器和存储器，所述存储器中存储有计算机程序，所述处理器执行所述存储器中存储的计算机程序，以使所述装置执行如权利要求6至10中任一项所述的方法。
  23. 一种通信装置，其特征在于，包括：处理器和接口电路；
    所述接口电路，用于接收代码指令并传输至所述处理器；
    所述处理器，用于运行所述代码指令以执行如权利要求1至5中任一项所述的方法。
  24. 一种通信装置，其特征在于，包括：处理器和接口电路；
    所述接口电路，用于接收代码指令并传输至所述处理器；
    所述处理器，用于运行所述代码指令以执行如权利要求6至10中任一项所述的方法。
  25. 一种计算机可读存储介质，用于存储有指令，当所述指令被执行时，使如权利要求1至5中任一项所述的方法被实现。
  26. 一种计算机可读存储介质，用于存储有指令，当所述指令被执行时，使如权利要求6至10中任一项所述的方法被实现。
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