CN114287166A

CN114287166A - Coverage enhancement method for third message repetition based on four-step random access

Info

Publication number: CN114287166A
Application number: CN202180004410.1A
Authority: CN
Inventors: 江小威
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2021-12-06
Filing date: 2021-12-06
Publication date: 2022-04-05
Anticipated expiration: 2041-12-06
Also published as: CN114287166B; WO2023102689A1

Abstract

The embodiment of the disclosure discloses a coverage enhancement method and a coverage enhancement device for a third message repetition based on four-step random access, which can be applied to the technical field of communication, wherein the method executed by a terminal device comprises the following steps: and in response to that the transmission times of the current preamble are larger than the transmission threshold and the random access RA process meets the preset condition, starting a repeat mode of a third message msg 3. Therefore, the terminal device can start the third message msg3repetition mode under the condition that the current preamble transmission frequency is greater than the transmission threshold and the RA process meets the preset condition, so that the coverage enhancement effect is realized.

Description

Coverage enhancement method for third message repetition based on four-step random access

Technical Field

The present disclosure relates to the field of communications technologies, and in particular, to a coverage enhancement method and a coverage enhancement device for a third message repetition based on four-step random access.

Background

In the communication system, one of the bottlenecks of the Uplink coverage is an Uplink shared Physical CHannel (PUSCH) CHannel for sending the third message msg3 in a four-step 4-step Random Access (RA) process. In the related art, coverage can be enhanced by repeating repetition by msg 3.

Disclosure of Invention

The embodiment of the disclosure provides a coverage enhancement method and a coverage enhancement device for a third message repetition based on four-step random access, which can be applied to the technical field of communication.

In a first aspect, an embodiment of the present disclosure provides a coverage enhancement method for a third message repetition based on four-step random access and a device thereof, where the method is performed by a terminal device, and the method includes: and in response to that the transmission times of the current preamble are larger than the transmission threshold and the random access RA process meets the preset condition, starting a repeat mode of a third message msg 3.

In the embodiment of the present disclosure, the terminal device may start the third message msg3repetition mode when the current preamble transmission frequency is greater than the transmission threshold and the RA process meets the preset condition, so as to achieve the coverage enhancement effect.

Optionally, the number of transmission times of the current preamble is greater than a transmission threshold, and is any of:

the preamble transmission times in the two-step 2step RA process are greater than the maximum transmission times of the message A MsgA;

the preamble transmission times in the two-step 2step RA process are larger than the rollback maximum transmission times of the message A MsgA;

fourthly, 4, in the step RA process, the preamble transmission times are greater than the maximum transmission times of the first message Msg 1;

fourthly, in the step RA process, the preamble transmission times are larger than the maximum backspacing transmission times of the Msg 1;

the preamble transmission times in the RA process are larger than the sum of the maximum transmission times of the MsgA and the maximum transmission times of the first message Msg 1.

Optionally, the method further includes:

receiving first indication information, wherein the first indication information is used for indicating a value of the transmission threshold.

Optionally, the receiving the first indication information includes:

receiving the first indication information through a broadcast message;

or,

and receiving the first indication information through a Radio Resource Control (RRC) message.

Optionally, the first indication information is further configured to indicate a cell identifier corresponding to the transmission threshold, or a bandwidth portion BWP identifier corresponding to the transmission threshold.

Optionally, the preset condition includes at least one of the following:

the random access procedure is not completed;

the current RA type is 2step RA;

the current RA type is 4step RA which is not 2step RA rollback;

contention resolution failure;

the current RA type is a 4-step RA backed by a 2-step RA;

and the reference signal received power RSRP of the downlink path loss reference point is smaller than a receiving threshold.

Optionally, the method further includes:

and sending second indication information, wherein the second indication information is used for indicating whether the terminal equipment supports the msg3 retransmission capability.

Optionally, the capability of whether the terminal device supports msg3repetition includes at least one of the following:

whether the terminal equipment supports the ability of msg3repetition under the condition of backing from 2step RA to 4step RA;

whether the terminal equipment supports the msg3 retransmission capability in each frequency band.

In a second aspect, an embodiment of the present disclosure provides another coverage enhancement method based on a third message repetition of four-step random access and an apparatus thereof, where the method is performed by a network device, and the method includes:

and determining that the terminal equipment starts a repeat repetition mode of a third message msg3 in response to that the number of transmission times of the preamble sent by the currently received terminal equipment is greater than a transmission threshold and the random access RA process meets a preset condition.

In the embodiment of the present disclosure, the network device may determine that the terminal device has started the repeat repetition mode of the third message msg3 when the transmission frequency of the preamble sent by the currently received terminal device is greater than the transmission threshold and the random access RA process meets the preset condition, so that the network device may establish a connection with the terminal device based on the msg3 repeatedly sent by the terminal device, thereby achieving the effect of coverage enhancement.

Optionally, the method further includes:

and sending first indication information, wherein the first indication information is used for indicating the value of the transmission threshold.

Optionally, the sending the first indication information includes:

transmitting the first indication information through a broadcast message;

or,

and sending the first indication information through a Radio Resource Control (RRC) message.

Optionally, the preset condition includes at least one of the following:

the random access procedure is not completed;

the current RA type is 2step RA;

the current RA type is 4step RA which is not 2step RA rollback;

contention resolution failure;

the current RA type is a 4-step RA backed by a 2-step RA;

Optionally, the method further includes:

and receiving second indication information, wherein the second indication information is used for indicating whether the terminal equipment supports the msg3 retransmission capability.

Optionally, the capability of whether the terminal device supports msg3 duplication includes at least one of the following:

In a third aspect, an embodiment of the present disclosure provides a communication apparatus, where the communication apparatus has a function of implementing part or all of the functions of the terminal device in the method according to the first aspect, for example, the function of the communication apparatus may have the functions in part or all of the embodiments in the present disclosure, or may have the functions of implementing any one of the embodiments in the present disclosure separately. The functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or software includes one or more units or modules corresponding to the above functions.

In a fourth aspect, an embodiment of the present disclosure provides another communication apparatus, where the communication apparatus has a function of implementing part or all of the functions of the network device in the method example described in the second aspect, for example, the function of the communication apparatus may have the functions in part or all of the embodiments of the present disclosure, or may have the functions of implementing any one of the embodiments of the present disclosure separately. The functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or software includes one or more units or modules corresponding to the above functions.

In a fifth aspect, the disclosed embodiments provide a communication device comprising a processor, which, when calling a computer program in a memory, executes the method of the first aspect.

In a sixth aspect, the disclosed embodiments provide a communication device comprising a processor that, when calling a computer program in a memory, performs the method of the second aspect described above.

In a seventh aspect, the disclosed embodiments provide a communication device comprising a processor and a memory, the memory having stored therein a computer program; the computer program, when executed by the processor, causes the communication apparatus to perform the method of the first aspect.

In an eighth aspect, an embodiment of the present disclosure provides a communication apparatus, including a processor and a memory, in which a computer program is stored; the computer program, when executed by the processor, causes the communication device to perform the method of the second aspect described above.

In a ninth aspect, an embodiment of the present disclosure provides a communication apparatus, including a processor and an interface circuit, where the interface circuit is configured to receive code instructions and transmit the code instructions to the processor, and the processor is configured to execute the code instructions to cause the apparatus to perform the method according to the first aspect.

In a tenth aspect, an embodiment of the present disclosure provides a communication apparatus, which includes a processor and an interface circuit, where the interface circuit is configured to receive code instructions and transmit the code instructions to the processor, and the processor is configured to execute the code instructions to cause the apparatus to perform the method according to the second aspect.

In an eleventh aspect, the disclosed embodiments provide a communication system, which includes the communication apparatus of the third aspect and the communication apparatus of the fourth aspect, or the system includes the communication apparatus of the fifth aspect and the communication apparatus of the sixth aspect, or the system includes the communication apparatus of the seventh aspect and the communication apparatus of the eighth aspect, or the system includes the communication apparatus of the ninth aspect and the communication apparatus of the tenth aspect.

In a twelfth aspect, an embodiment of the present invention provides a computer-readable storage medium, configured to store instructions for the terminal device, and when the instructions are executed, the method according to the first aspect is implemented.

In a thirteenth aspect, an embodiment of the present invention provides a computer-readable storage medium for storing instructions for the network device, where the instructions, when executed, cause the method of the second aspect to be implemented.

In a fourteenth aspect, the present disclosure also provides a computer program product comprising a computer program which, when run on a computer, causes the computer to perform the method of the first aspect described above.

In a fifteenth aspect, the present disclosure also provides a computer program product comprising a computer program which, when run on a computer, causes the computer to perform the method of the second aspect described above.

In a sixteenth aspect, the present disclosure provides a chip system comprising at least one processor and an interface for enabling a terminal device to implement the functionality according to the first aspect, e.g. to determine or process at least one of data and information related in the above method. In one possible design, the chip system further includes a memory for storing computer programs and data necessary for the terminal device. The chip system may be formed by a chip, or may include a chip and other discrete devices.

In a seventeenth aspect, the present disclosure provides a chip system comprising at least one processor and an interface, for enabling a network device to implement the functions referred to in the second aspect, e.g., determining or processing at least one of data and information referred to in the above method. In one possible design, the system-on-chip further includes a memory for storing computer programs and data necessary for the network device. The chip system may be formed by a chip, or may include a chip and other discrete devices.

In an eighteenth aspect, the present disclosure provides a computer program which, when run on a computer, causes the computer to perform the method of the first aspect described above.

In a nineteenth aspect, the present disclosure provides a computer program which, when run on a computer, causes the computer to perform the method of the second aspect described above.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments or the background art of the present disclosure, the drawings required to be used in the embodiments or the background art of the present disclosure will be described below.

Fig. 1 is a schematic architecture diagram of a communication system provided by an embodiment of the present disclosure;

fig. 2 is a flowchart illustrating a coverage enhancement method based on a third message repetition of four-step random access according to an embodiment of the present disclosure;

fig. 3 is a flowchart illustrating a coverage enhancement method based on a third message repetition of four-step random access according to another embodiment of the present disclosure;

fig. 4 is a flowchart illustrating a coverage enhancement method based on a third message repetition of four-step random access according to another embodiment of the present disclosure;

fig. 5 is a flowchart illustrating a coverage enhancement method based on a third message repetition of four-step random access according to another embodiment of the present disclosure;

fig. 6 is a flowchart illustrating a coverage enhancement method based on a third message repetition of four-step random access according to another embodiment of the present disclosure;

fig. 7 is a flowchart illustrating a coverage enhancement method based on a third message repetition of four-step random access according to another embodiment of the present disclosure;

fig. 8 is a flowchart illustrating a coverage enhancement method based on a third message repetition of four-step random access according to another embodiment of the present disclosure;

fig. 9 is a flowchart illustrating a coverage enhancement method based on a third message repetition of four-step random access according to another embodiment of the present disclosure;

fig. 10 is a flowchart illustrating a coverage enhancement method based on a third message repetition of four-step random access according to another embodiment of the present disclosure;

fig. 11 is a flowchart illustrating a coverage enhancement method based on a third message repetition of four-step random access according to another embodiment of the present disclosure;

fig. 12 is a flowchart illustrating a coverage enhancement method based on a third message repetition of four-step random access according to another embodiment of the present disclosure;

fig. 13 is a flowchart illustrating a coverage enhancement method based on a third message repetition of four-step random access according to another embodiment of the present disclosure;

fig. 14 is a flowchart illustrating a coverage enhancement method based on a third message repetition of four-step random access according to another embodiment of the present disclosure;

fig. 15 is a flowchart illustrating a coverage enhancement method based on a third message repetition of four-step random access according to another embodiment of the present disclosure;

fig. 16 is a flowchart illustrating a coverage enhancement method based on a third message repetition of four-step random access according to another embodiment of the present disclosure;

fig. 17 is a flowchart illustrating a coverage enhancement method based on a third message repetition of four-step random access according to 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 disclosure.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

It is understood that "a plurality" in this disclosure means two or more, and other words are analogous. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. The singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

For ease of understanding, terms referred to in the present application will be first introduced.

1. Random Access (RA)

The random access procedure refers to a procedure from a user sending a random access preamble to trying to access the network to a time when a basic signaling connection is established with the network. Random access is a very critical step in a mobile communication system and is also the last step in establishing a communication link between a terminal device and a network. The terminal equipment can perform information interaction with the network equipment through random access. The random access procedure may include two-step random access and four-step random access.

Wherein, the four-step 4step random access process includes: the terminal equipment sends a random access preamble through a first message msg 1; the network device sends a Random Access Response (RAR) message through a second message msg 2; the terminal device sends a Radio Resource Control (RRC) connection request through a third message msg 3; the terminal receives the RRC connection establishment (i.e., the contention resolution response procedure) via the fourth message msg4

The two-step 2step random access procedure includes: the terminal equipment sends A message msgA to the network equipment, and the network equipment sends B message msgB to the terminal equipment. Wherein, the msgA comprises the equivalent content of msg1 and msg3 in the four-step random access; the msgB includes contents equivalent to msg2 and msg4 in four-step random access.

2. Third message (msg3)

The third message in the 4step random access process is called Msg3, and the content of the Msg3 message may be different according to the state of the terminal device and the application scenario. The Msg3 needs to contain an important message: and unique identification of each terminal device, wherein the identification is used for solving the fourth step competition in the four-step random access.

3. Radio Resource Control (RRC)

Radio Resource Control (RRC), also known as radio resource management or radio resource allocation, refers to performing radio resource management, control and scheduling by using certain policies and means, and under the condition of meeting the requirement of service quality, making full use of limited radio network resources as much as possible, ensuring that the radio network resources reach a planned coverage area, and improving service capacity and resource utilization as much as possible.

In order to better understand the coverage enhancement method and device based on the third message repetition of the four-step random access disclosed in the embodiments of the present disclosure, a communication system to which the embodiments of the present disclosure are applicable is first described below.

Referring to fig. 1, fig. 1 is a schematic diagram of an architecture of a communication system according to an embodiment of the present disclosure. The communication system may include, but is not limited to, one network device and one terminal device, the number and the form of the devices shown in fig. 1 are only used for example and do not constitute a limitation to the embodiments of the present disclosure, and two or more network devices and two or more terminal devices may be included in practical applications. The communication system shown in fig. 1 may include a network device 11 and a terminal device 12.

It should be noted that the technical solutions of the embodiments of the present disclosure can be applied to various communication systems. For example: a Long Term Evolution (LTE) system, a 5th generation (5G) mobile communication system, a 5G New Radio (NR) system, or other future new mobile communication systems.

The network device 11 in the embodiment of the present disclosure is an entity for transmitting or receiving signals on the network side. For example, the network device 11 may be an evolved NodeB (eNB), a transmission point (TRP), a next generation base station (gNB) in an NR system, a base station in other future mobile communication systems, or an access node in a wireless fidelity (WiFi) system. The embodiments of the present disclosure do not limit the specific technologies and the specific device forms adopted by the network devices. The network device provided by the embodiment of the present disclosure may be composed of a Central Unit (CU) and a Distributed Unit (DU), where the CU may also be referred to as a control unit (control unit), and a protocol layer of a network device, such as a base station, may be split by using a structure of CU-DU, functions of a part of the protocol layer are placed in the CU for centralized control, and functions of the remaining part or all of the protocol layer are distributed in the DU, and the DU is centrally controlled by the CU.

The terminal device 12 in the embodiment of the present disclosure is an entity, such as a mobile phone, on the user side for receiving or transmitting signals. A terminal device may also be referred to as a terminal device (terminal), a User Equipment (UE), a Mobile Station (MS), a mobile terminal device (MT), etc. The terminal device may be a vehicle having a communication function, a smart vehicle, a mobile phone (mobile phone), a wearable device, a tablet computer (Pad), a computer with a wireless transceiving function, a Virtual Reality (VR) terminal device, an Augmented Reality (AR) terminal device, a wireless terminal device in industrial control (industrial control), a wireless terminal device in self-driving (self-driving), a wireless terminal device in remote surgery (remote medical supply), a wireless terminal device in smart grid (smart grid), a wireless terminal device in transportation safety (transportation safety), a wireless terminal device in smart city (smart city), a wireless terminal device in smart home (smart home), and the like. The embodiments of the present disclosure do not limit the specific technology and the specific device form adopted by the terminal device.

It is to be understood that the communication system described in the embodiment of the present disclosure is for more clearly illustrating the technical solutions of the embodiment of the present disclosure, and does not constitute a limitation to the technical solutions provided in the embodiment of the present disclosure, and as a person having ordinary skill in the art knows that as the system architecture evolves and new service scenarios appear, the technical solutions provided in the embodiment of the present disclosure are also applicable to similar technical problems.

The coverage enhancement method based on the third message repetition of the four-step random access provided by the present disclosure is described in detail below with reference to the accompanying drawings.

Referring to fig. 2, fig. 2 is a flowchart illustrating a coverage enhancement method for a third message repetition based on four-step random access according to an embodiment of the present disclosure, where the method is executed by a terminal device. As shown in fig. 2, the method may include, but is not limited to, the following steps:

step 21, in response to that the transmission times of the current preamble are greater than the transmission threshold and the random access RA process meets the preset condition, starting a repeat repetition mode of a third message msg 3.

It should be noted that, in the related art, the coverage can be enhanced by means of msg3 repetition. However, in the 4step RA process, whether the terminal device turns on msg3 repetition; or after the 2step RA returns fallback to 4step RA, whether the Msg3 repeption can be opened; or in the case of Msg3 repetization being turned on after 2-step RA fallback to 4-step RA is supported, under what conditions Msg3 repetization may be turned on; alternatively, during a 2-step RA, it has not been determined whether the terminal device can start msg3 reptition before going back to a 4-step RA.

In addition, if the Msg3 retransmission is opened after the 2-step RA fallback to 4-step RA is not supported, if the terminal device determines whether to open the Msg3 retransmission based on the condition that the preamble transmission time is greater than the maximum transmission time (Msg1-TransMax) of the Msg1, it may cause the current 4-step RA to possibly come back from the 2-step RA fallback, and the value of the maximum transmission time (MsgA-TransMax) of the MsgA configured by the network device is less than the value of Msg1-TransMax, the preamble transmission time may still satisfy the condition that is greater than Msg1-TransMax, so that the Msg3 retransmission is started under the condition that the Msg3 retransmission is not supported from the 2-step RA fallback to the 4-step RA Msg3 retransmission.

Accordingly, in the present disclosure, a method of initiating a third message repetition mode of four-step random access is provided, such that abnormal initiation of the Msg3repetition mode is avoided while coverage enhancement is achieved.

Optionally, the number of transmission times of the current preamble is greater than the transmission threshold, which may be any of the following:

the preamble transmission times in the two-step 2step random access RA process are larger than the maximum transmission times (msgA-TransMax) of the message A MsgA;

the preamble transmission times in the two-step 2step RA process are larger than the backoff maximum transmission times (msgA-TransMax-CE) of the message A MsgA;

in the four-step 4step RA process, the preamble transmission times are greater than the maximum transmission times (Msg1-TransMax) of the first message Msg 1;

in the four-step 4step RA process, preamble transmission times are larger than the maximum backoff transmission times (Msg1-TransMax-fallback) of Msg 1;

It is understood that the RA procedure may include 2step RA and 4step RA, i.e. the total number of preamble transmissions in the 2step RA and 4step RA procedure needs to be greater than the sum of the maximum number of MsgA transmissions and the maximum number of Msg1 transmissions.

Optionally, the preset condition may include at least one of:

the random access procedure is not completed;

the current RA type is 2step RA;

the current RA type is 4step RA which is not 2step RA rollback;

contention resolution failure;

the current RA type is a 4-step RA backed by a 2-step RA;

the Reference Signal Receiving Power (RSRP) of the downlink Reference point is smaller than the Receiving threshold.

By implementing the embodiment of the disclosure, the terminal device can start the third message msg3repetition mode under the condition that the current preamble transmission times is greater than the transmission threshold and the RA process meets the preset condition, thereby realizing the coverage enhancement effect.

Referring to fig. 3, fig. 3 illustrates a coverage enhancement method for a third message repetition based on four-step random access according to the present disclosure, by taking an example of turning on an Msg3 retransmission mode after not supporting 2-step RA fallback to 4-step RA. Fig. 3 is a flowchart of a coverage enhancement method based on a third message repetition of four-step random access, which is performed by a terminal device according to an embodiment of the present disclosure. As shown in fig. 3, the method may include, but is not limited to, the following steps:

step 31, receiving first indication information, where the first indication information is used to indicate a value of a transmission threshold.

It should be noted that, for the case that the Msg3 retransmission is started after the 2-step RA fallback to 4-step RA is not supported, in the embodiment of the present disclosure, the value of the transmission threshold indicated by the first indication information may be the maximum transmission time of the Msg 1.

Optionally, the terminal device may receive the first indication information through a broadcast message; alternatively, the terminal device may receive the first indication information through a radio resource control RRC message.

Optionally, the broadcast message may be an SIB1(System Information Block Type1) message, which is not limited in this disclosure.

Optionally, the first indication information may also be used to indicate a cell identifier 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, it can be determined whether to turn on the msg3 retransmission mode based on the transmission threshold.

Alternatively, a BandWidth Part (BWP) corresponding to the transmission threshold is identified. That is, only in the case where the bandwidth part to be used by the terminal device is the bandwidth part indicated by the bandwidth part identification, it is determined whether to turn on the msg3 duplication mode based on the transmission threshold.

And step 32, starting an msg3 retransmission mode under the conditions that the current preamble transmission times are greater than a transmission threshold, the RA process meets the conditions that the random access process is not completed, the current RA type is 4step RA of non-2 step RA backoff, and the downlink path loss reference point RSRP is less than a receiving threshold.

In the embodiment of the present disclosure, after receiving the RAR sent by the network device, if the terminal device determines that the RA process is not completed, and the current 4-step RA is not returned by the 2-step RA fallback, and the PREAMBLE TRANSMISSION time is greater than Msg1-TransMax indicated by the first indication information, that is, PREAMBLE _ transition _ COUNTER ═ Msg1-TransMax +1, the terminal device may start the Msg3 retransmission mode.

Optionally, before turning on the msg3repetition, the terminal device may further determine whether an RSRP of the downlink path loss reference point is smaller than a reception threshold, and turn on the msg3repetition mode when the RSRP of the downlink path loss reference point is smaller than the reception threshold. The receiving Threshold may be an RSRP Threshold (RSRP-Threshold-msg3 repetition) of msg3repetition, which is not limited in this disclosure.

Optionally, after determining that the 4-step RA process is not completed, the terminal device may first determine whether the msg3repetition mode is already turned on, and further determine whether preset conditions, such as that the current RA type is a 4-step RA with non-2-step RA fallback, that the downlink loss reference point RSRP is less than the receiving threshold, and that the current preamble transmission frequency is greater than msg1-TransMax, are met under the condition that the msg3repetition mode is not turned on. Thus, resources of the terminal device can be saved.

By implementing the embodiment of the disclosure, after receiving the value of the transmission threshold indicated by the network device, the terminal device further starts the msg3 retransmission mode under the condition that the current preamble transmission times is greater than the transmission threshold, the random access process is not completed, the current RA type is 4step RA of non-2 step RA backoff, and the downlink path loss reference point RSRP is less than the reception threshold, thereby realizing the coverage enhancement effect.

Referring to fig. 4, fig. 4 illustrates a coverage enhancement method for a third message repetition based on four-step random access according to the present disclosure, taking the Msg3 retransmission mode that is turned on after the 2-step RA fallback to 4-step RA fallback is not supported as an example. Fig. 4 is a flowchart illustrating a coverage enhancement method based on a third message repetition of four-step random access, which is performed by a terminal device according to an embodiment of the present disclosure. As shown in fig. 4, the method may include, but is not limited to, the following steps:

step 41, receiving first indication information, where the first indication information is used to indicate a value of a transmission threshold.

The specific implementation form of step 41 may refer to detailed steps in other embodiments in the present disclosure, and is not described in detail here.

And 42, starting an msg3 retransmission mode under the conditions that the current preamble transmission times are greater than a transmission threshold, the RA process meets the conditions that the random access process is not completed, the current RA type is 4step RA of non-2 step RA fallback, the downlink path loss reference point RSRP is less than a receiving threshold, and the content resolution fails.

In the embodiment of the present disclosure, after the terminal device fails in the content resolution, if the terminal device determines that the RA process is not completed, and the current 4-step RA is not returned by the 2-step RA fallback, and the PREAMBLE TRANSMISSION time is greater than Msg1-TransMax indicated by the first indication information, that is, PREAMBLE _ transition _ COUNTER ═ Msg1-TransMax +1, the terminal device may start the Msg3 retransmission mode.

Optionally, before turning on the msg3repetition, the terminal device may further simultaneously determine whether an RSRP of the downlink path loss reference point is smaller than a reception threshold, and turn on the msg3repetition mode when the RSRP of the downlink path loss reference point is smaller than the reception threshold. The receiving Threshold may be an RSRP Threshold (RSRP-Threshold-msg3 repetition) of msg3repetition, which is not limited in this disclosure.

Optionally, after determining that the 4-step RA process is not completed, the terminal device may first determine whether the msg3repetition mode is already turned on, and further determine whether preset conditions such as that the current RA type is a 4-step RA with non-2-step RA fallback, that the downlink loss reference point RSRP is less than the reception threshold, that the content resolution fails, and that the current preamble transmission frequency is greater than msg1-TransMax are met under the condition that the msg3repetition mode is not turned on. Thus, resources of the terminal device can be saved.

By implementing the embodiment of the disclosure, after receiving the value of the transmission threshold indicated by the network device, the terminal device further starts the msg3 retransmission mode under the conditions that the current preamble transmission times are greater than the transmission threshold, the random access process is not completed, the current RA type is 4-step RA of non-2-step RA backoff, the downlink path loss reference point RSRP is less than the reception threshold, and the contention resolution failure is solved, thereby realizing the coverage enhancement effect.

Referring to fig. 5, fig. 5 illustrates a coverage enhancement method for a third message repetition based on four-step random access according to the present disclosure, taking an Msg3 retransmission mode that is turned on after supporting 2-step RA fallback to 4-step RA as an example. Fig. 5 is a flowchart illustrating a coverage enhancement method based on a third message repetition of four-step random access, where the method is executed by a terminal device. As shown in fig. 5, the method may include, but is not limited to, the following steps:

step 51, receiving first indication information, where the first indication information is used to indicate a value of a transmission threshold.

It should be noted that, for the case of supporting 2-step RA fallback to 4-step RA and then starting Msg3 retransmission, in the embodiment of the present disclosure, the value of the transmission threshold indicated by the first indication information may be the sum of the maximum number of transmissions of MsgA and the maximum number of transmissions of Msg 1.

The specific implementation form of step 51 may refer to detailed steps in other embodiments in the present disclosure, and is not described in detail here.

Step 52, the msg3 retransmission mode is started under the condition that the current preamble transmission times is greater than the transmission threshold, the RA process meets the conditions that the random access process is not completed, the current RA type is 4step RA of non-2 step RA fallback, the downlink path loss reference point RSRP is less than the receiving threshold, and the content resolution fails.

In the embodiment of the present disclosure, after receiving the RAR phase or after the failure of the content resolution, the terminal device determines that the RA procedure is not completed, and the current RA type is 4-step RA, and the current 4-step RA is returned by the 2-step RA fallback, and the terminal device applies msg1-TransMax, so that the terminal device can turn on the msg3 retransmission mode when the PREAMBLE _ TRANSMISSION _ COUNTER is msg1-TransMax + msgA-TransMax + 1.

Optionally, after determining that the 4-step RA process is not completed, the terminal device may first determine whether the msg3repetition mode is already turned on, and further determine whether preset conditions such as that the current RA type is a 4-step RA with non-2-step RA fallback, that the downlink loss reference point RSRP is less than a receiving threshold, and that the current preamble transmission frequency is greater than the sum of msg1-trans max and msgA-trans max are met under the condition that the msg3repetition mode is not turned on. Thus, resources of the terminal device can be saved.

By implementing the embodiment of the disclosure, after receiving the value of the transmission threshold indicated by the network device, the terminal device further starts the msg3 retransmission mode under the conditions that the current preamble transmission times is greater than the transmission threshold, the random access process is not completed, the current RA type is 4-step RA of non-2-step RA backoff, the downlink path loss reference point RSRP is less than the reception threshold, and the contention resolution failure is solved, thereby realizing the coverage enhancement effect.

Referring to fig. 6, fig. 6 illustrates a coverage enhancement method for a third message repetition based on four-step random access according to the present disclosure, taking an example of supporting a 2-step RA fallback to 4-step RA subsequent turn-on Msg3 retransmission mode. Fig. 6 is a flowchart illustrating a coverage enhancement method based on a third message repetition of four-step random access, where the method is executed by a terminal device. As shown in fig. 6, the method may include, but is not limited to, the following steps:

and step 61, receiving first indication information, wherein the first indication information is used for indicating a value of a transmission threshold.

It should be noted that, for the case of starting the Msg3 retransmission after supporting 2-step RA fallback to 4-step RA, in the embodiment of the present disclosure, the value of the transmission threshold indicated by the first indication information may be the maximum number of transmission backs (Msg1-TransMax-fallback) of the Msg 1.

The specific implementation form of step 61 may refer to detailed steps in other embodiments in the present disclosure, and is not described in detail here.

Step 62, the msg3 retransmission mode is started under the condition that the current preamble transmission times is greater than the transmission threshold, the RA process satisfies the conditions that the random access process is not completed, the current RA type is 4step RA of non-2 step RA fallback, the downlink path loss reference point RSRP is less than the receiving threshold, and the content resolution fails.

In the embodiment of the present disclosure, after receiving the RAR phase or after the content resolution fails, the terminal device determines that the RA procedure is not completed, and the current RA type is 4-step RA, and the current 4-step RA is returned from the 2-step RA fallback, and the terminal device applies msg1-trans max-fallback, so that the terminal device can turn on the msg3 retransmission mode when the PREAMBLE _ TRANSMISSION _ COUNTER is msg1-trans max-fallback + 1.

Optionally, the terminal device may determine whether the msg3 retransmission mode is already turned on after determining that the 4-step RA process is not completed, and further determine whether preset conditions such as that the current RA type is a 4-step RA that is not a 2-step RA fallback, that the downlink loss reference point RSRP is less than a reception threshold, and that the current preamble transmission frequency is greater than msg1-trans max-fallback are met under the condition that the msg3 retransmission mode is not turned on. Thus, resources of the terminal device can be saved.

By implementing the embodiment of the disclosure, after receiving the value of the transmission threshold indicated by the network device, the terminal device further starts the msg3 retransmission mode under the condition that the current preamble transmission times is greater than the transmission threshold, the random access process is not completed, the current RA type is 4-step RA of non-2-step RA backoff, the downlink loss reference point RSRP is less than the reception threshold, and the content resolution is satisfied, thereby realizing the coverage enhancement effect.

Referring to fig. 7, fig. 7 illustrates a coverage enhancement method for a third message repetition based on four-step random access according to the present disclosure, taking an example of supporting a 2-step RA fallback to 4-step RA subsequent turn-on Msg3 retransmission mode. Fig. 7 is a flowchart illustrating a coverage enhancement method based on a third message repetition of four-step random access, where the method is executed by a terminal device. As shown in fig. 7, the method may include, but is not limited to, the following steps:

step 71, receiving first indication information, where the first indication information is used to indicate a value of a transmission threshold.

It should be noted that, for the case of starting the Msg3 retransmission after supporting 2-step RA fallback to 4-step RA, in the embodiment of the present disclosure, the value of the transmission threshold indicated by the first indication information may be the sum of the maximum number of transmissions of the MsgA and the maximum number of transmissions of the Msg 1.

The specific implementation form of step 71 may refer to detailed steps in other embodiments in the present disclosure, and is not described in detail here.

Step 72, the msg3 retransmission mode is started under the condition that the current preamble transmission times is greater than the transmission threshold, the RA process meets the conditions that the random access process is not completed, the current RA type is 4step RA of non-2 step RA fallback, the downlink path loss reference point RSRP is less than the receiving threshold, and the content resolution.

In the embodiment of the present disclosure, after receiving the RAR phase or after the content resolution fails, the terminal device determines that the RA procedure is not completed, and the current RA type is 4-step RA, and the current 4-step RA is returned by the 2-step RA fallback, and the terminal device applies msg1-trans max-fallback, so that the terminal device can turn on the msg3 retransmission mode when the PREAMBLE _ TRANSMISSION _ COUNTER is msgA-trans max + msg1-trans max-fallback + 1.

Optionally, after determining that the 4-step RA process is not completed, the terminal device may first determine whether the msg3repetition mode is already turned on, and further determine whether preset conditions such as that the current RA type is a 4-step RA with non-2-step RA fallback, that the downlink loss reference point RSRP is less than a receiving threshold, and that the current preamble transmission frequency is greater than the sum of msgA-fransmax and msg 1-fransmax are satisfied, under the condition that the msg3repetition mode is not turned on. Thus, resources of the terminal device can be saved.

By implementing the embodiment of the disclosure, after receiving the value of the transmission threshold indicated by the network device, the terminal device further starts the msg3 retransmission mode under the conditions that the current preamble transmission times are greater than the transmission threshold, the random access process is not completed, the current RA type is 4-step RA of non-2-step RA backoff, the downlink loss reference point RSRP is less than the reception threshold, and the content resolution fails, thereby realizing the coverage enhancement effect.

Referring to fig. 8, fig. 8 illustrates a coverage enhancement method for a third message repetition based on four-step random access according to the present disclosure, taking the 2-step RA duration turn-on Msg3repetition mode as an example. Fig. 8 is a flowchart illustrating a coverage enhancement method based on a third message repetition of four-step random access, where the method is executed by a terminal device. As shown in fig. 8, the method may include, but is not limited to, the following steps:

step 81, receiving first indication information, where the first indication information is used to indicate a value of a transmission threshold.

It should be noted that, for the case that the Msg3 retransmission mode is turned on during the 2-step RA, in the embodiment of the present disclosure, the transmission threshold value indicated by the first indication information may be set to be the maximum number of backoff transmissions (Msg1-TransMax-fallback) of the Msg 1.

The specific implementation form of step 81 may refer to detailed steps in other embodiments in the present disclosure, and is not described in detail here.

And step 82, starting the msg3 retransmission mode under the conditions that the current preamble transmission times are greater than the transmission threshold, the RA process meets the conditions that the random access process is not completed, the current RA type is 2step RA, and the downlink path loss reference point RSRP is less than the receiving threshold.

In the embodiment of the present disclosure, after receiving the MsgB stage or after the content resolution fails, the terminal device determines that the RA process is not completed, and the current RA type is 2step RA, and the terminal device applies msgA-TransMax-CE, and when preset _ transition _ COUNTER is msgA-TransMax-CE +1, the terminal device selects 4-step RA, and turns on the msg3repetition mode.

Optionally, before selecting 4-step RA to turn on msg3repetition, the terminal device may further determine whether a downlink path loss reference point RSRP is smaller than a reception threshold, and turn on an msg3repetition mode when the downlink path loss reference point RSRP is smaller than the reception threshold. The receiving Threshold may be an RSRP Threshold (RSRP-Threshold-msg3 repetition) of msg3repetition, which is not limited in this disclosure.

Optionally, after determining that the RA process is not completed, the terminal device may first determine whether the msg3repetition mode is already turned on, and further determine whether preset conditions, such as that the current RA type is 2step RA, the downlink path loss reference point RSRP is smaller than the reception threshold, and the current preamble transmission frequency is greater than msgA-TransMax-CE, are met under the condition that the msg3repetition mode is not turned on. Thus, resources of the terminal device can be saved.

By implementing the embodiment of the disclosure, after receiving the value of the transmission threshold indicated by the network device, the terminal device further starts the msg3 retransmission mode when the current preamble transmission frequency is greater than the transmission threshold, the random access process is not completed, the current RA type is 2step RA, and the downlink path loss reference point RSRP is less than the reception threshold, thereby realizing the coverage enhancement effect.

Referring to fig. 9, fig. 9 is a flowchart illustrating a coverage enhancement method for a third message repetition based on four-step random access according to an embodiment of the present disclosure, where the method is executed by a terminal device. As shown in fig. 9, the method may include, but is not limited to, the following steps:

and step 91, sending second indication information, wherein the second indication information is used for indicating whether the terminal equipment supports the msg3 retransmission capability.

Optionally, the capability of whether the terminal device supports msg3 duplication may include at least one of:

whether the terminal device supports msg3 retransmission capability in each frequency band.

Optionally, the terminal device may report, to the network device through the second indication information, whether the terminal device supports msg3 duplication in all frequency bands. Or, the second indication information may also be used to report to the network device whether each frequency band supports the msg3 retransmission capability. That is, the second indication information may include an identifier of each frequency band and a capability of whether each frequency band supports msg3repetition, which is not limited in this disclosure.

For example, the terminal device may indicate, through one piece of second indication information, whether the terminal device supports msg3repetition in a frequency range 1(frequency range, FR1) frequency band and a frequency range 2(frequency range, FR2) frequency band, or may indicate, through different pieces of second indication information, whether the FR1 frequency band, the FR2-1 frequency band, and the FR2-2 frequency band support msg3 repetition. The present disclosure is not limited thereto.

Wherein, the frequency band of FR1 is 410 MHz-7125 MHz; the FR2 frequency band can be 24250 MHz-52600 MHz, or the FR2 frequency band can also be 24250 MHz-71000 MHz. If the FR2 frequency band is 24250 MHz-71000MHz, the FR2 frequency band can be divided into an FR2-1 frequency band and an FR2-2 frequency band, wherein the FR2-1 frequency band is 24250 MHz-52600 MHz; the FR2-2 frequency band is 52600MHz-71000 MHz.

And step 92, receiving first indication information, wherein the first indication information is used for indicating the value of the transmission threshold.

And step 93, responding to the fact that the current preamble transmission times are larger than the transmission threshold value and the RA process meets the preset condition, and starting the msg3repetition mode.

The specific implementation forms of step 92 and step 93 may refer to detailed steps in other embodiments in the present disclosure, and are not described in detail here.

It can be understood that, in the embodiment of the present disclosure, the terminal device first sends the network device the capability of whether or not it supports msg3repetition, and then the network device may indicate the transmission threshold to the terminal device under the condition that the terminal device supports msg3repetition, thereby saving the resources of the network device and the channel resources.

By implementing the embodiment of the disclosure, the terminal equipment indicates whether the terminal equipment supports the msg3 retransmission capability to the network equipment, then receives the value of the transmission threshold indicated by the network equipment, and finally starts the msg3 retransmission mode under the condition that the current preamble transmission frequency is greater than the transmission threshold and the RA process meets the preset condition. Therefore, under the conditions that the terminal equipment supports msg3repetition, the current preamble transmission frequency is greater than the transmission threshold value, and the RA process meets the preset condition, the msg3repetition mode is started, so that the coverage enhancement effect is achieved, and the resources are saved.

Referring to fig. 10, fig. 10 is a flowchart illustrating a coverage enhancement method for a third message repetition based on four-step random access according to an embodiment of the present disclosure, where the method is executed by a network device. As shown in fig. 10, the method may include, but is not limited to, the following steps:

step 101, in response to that the number of transmission times of the preamble sent by the currently received terminal device is greater than the transmission threshold and the RA process meets a preset condition, determining that the terminal device has started a repeat repetition mode of a third message msg 3.

Optionally, the preset condition may include at least one of:

the random access procedure is not completed;

the current RA type is 2step RA;

the current RA type is 4step RA which is not 2step RA rollback;

contention resolution failure;

the current RA type is a 4-step RA backed by a 2-step RA;

By implementing the embodiment of the disclosure, the network device may determine that the terminal device has started the repeat repetition mode of the third message msg3 when the transmission frequency of the preamble transmitted by the currently received terminal device is greater than the transmission threshold and the RA process meets the preset condition, so that the network device may establish a connection with the terminal device based on the msg3 repeatedly transmitted by the terminal device, thereby achieving the effect of coverage enhancement.

Referring to fig. 11, fig. 11 illustrates a coverage enhancement method for a third message repetition based on four-step random access according to the present disclosure, by taking an example of turning on the Msg3 retransmission mode after not supporting 2-step RA fallback to 4-step RA. Fig. 11 is a flowchart illustrating a coverage enhancement method based on a third message repetition of four-step random access, which is performed by a network device according to an embodiment of the present disclosure. As shown in fig. 11, the method may include, but is not limited to, the following steps:

and step 111, sending first indication information, wherein the first indication information is used for indicating the value of the transmission threshold.

It should be noted that, for the case that the Msg3 retransmission is started after the 2-step RA fallback to the 4-step RA is not supported, in this embodiment of the present disclosure, a value of the transmission threshold indicated by the first indication information sent by the network device may be the maximum transmission time of the Msg 1.

Optionally, the network device may receive the first indication information through a broadcast message; alternatively, the network device also receives the first indication information through a radio resource control RRC message.

Optionally, the broadcast message may be an SIB1 (systeminformationblock Type1) message, which is not limited in this disclosure.

And step 112, determining that the msg3 retransmission mode is started by the terminal equipment under the condition that the number of preamble transmission times sent by the currently received terminal equipment is greater than a transmission threshold, the RA process meets the conditions that the random access process is not completed, the current RA type is 4step RA of non-2 step RA backoff, and the downlink path loss reference point RSRP is less than the reception threshold.

In the embodiment of the present disclosure, if after the RAR sent by the network device to the terminal device, it is determined that the RA procedure is not completed, and the current 4-step RA is not returned by the 2-step RA fallback, and the PREAMBLE TRANSMISSION time is greater than Msg1-TransMax indicated by the first indication information, that is, PREAMBLE _ transition _ COUNTER is Msg1-TransMax +1, and the terminal device is determined to be able to start the Msg3 retransmission mode under the condition that the downlink loss reference point RSRP is less than the reception threshold.

The receiving Threshold may be an RSRP Threshold (RSRP-Threshold-msg3 repetition) of msg3repetition, which is not limited in this disclosure.

Optionally, after determining that the 4-step RA process is not completed, the network device may first determine whether the terminal device has already started the msg3 retransmission mode, and further determine whether the current RA type is the 4-step RA in which the non-2-step RA backoff is satisfied, whether the downlink path loss reference point RSRP is smaller than the reception threshold, and whether the current preamble transmission frequency is greater than the msg1-TransMax preset condition, under the condition that the terminal device has not started the msg3 retransmission mode. Thus, resources of the network device can be saved.

By implementing the embodiment of the disclosure, the network device sends first indication information for indicating the value of the transmission threshold to the terminal device, and then determines that the terminal device has started the msg3 retransmission mode under the condition that the number of preamble transmission times sent by the currently received terminal device is greater than the transmission threshold, the condition that the random access process is not completed, the current RA type is 4step RA of non-2 step RA backoff, and the downlink path loss reference point RSRP is less than the reception threshold, so that the network device can establish connection with the terminal device based on the msg3 repeatedly sent by the terminal device, and further realize the coverage enhancement effect.

Referring to fig. 12, fig. 12 illustrates a coverage enhancement method for a third message repetition based on four-step random access according to the present disclosure, taking the Msg3 retransmission mode that is turned on after the 2-step RA fallback to 4-step RA fallback is not supported as an example. Fig. 12 is a flowchart illustrating a coverage enhancement method based on a third message repetition of four-step random access, which is performed by a network device according to an embodiment of the present disclosure. As shown in fig. 12, the method may include, but is not limited to, the steps of:

step 121, sending first indication information, where the first indication information is used to indicate a value of a transmission threshold.

The specific implementation form of step 121 may refer to detailed steps in other embodiments in the present disclosure, and is not described in detail here.

Step 122, determining that the terminal device has started the msg3 retransmission mode under the condition that the number of preamble transmission times sent by the currently received terminal device is greater than the transmission threshold, the RA process satisfies 4-step RA in which the random access process is not completed, the current RA type is non-2-step RA backoff, the downlink path loss reference point RSRP is less than the reception threshold, and the content retransmission fails.

In this embodiment of the present disclosure, after the content resolution fails, if the RA procedure is not completed, and the current 4-step RA is not returned by the 2-step RA fallback, and the PREAMBLE TRANSMISSION time is greater than Msg1-TransMax indicated by the first indication information, that is, PREAMBLE _ TRANSMISSION _ COUNTER is Msg1-TransMax +1, and the downlink loss reference point RSRP is less than the receiving threshold, the network device may determine that the terminal device has started the Msg3 retransmission mode.

By implementing the embodiment of the disclosure, the network device sends first indication information for indicating the value of the transmission threshold to the terminal device, and then determines that the terminal device starts a msg3 retransmission mode under the conditions that the number of preamble transmission times sent by the currently received terminal device is greater than the transmission threshold, the random access process is not completed, the current RA type is 4step RA of non-2 step RA backoff, the downlink loss reference point RSRP is less than the reception threshold, and the content resolution fails, so that the network device can establish connection with the terminal device based on the msg3 repeatedly sent by the terminal device, and further realize the coverage enhancement effect.

Referring to fig. 13, fig. 13 illustrates a coverage enhancement method for a third message repetition based on four-step random access according to the present disclosure, taking an example of supporting a 2-step RA fallback to 4-step RA subsequent turn-on Msg3 retransmission mode. Fig. 13 is a flowchart illustrating a coverage enhancement method based on a third message repetition of four-step random access, where the method is performed by a network device according to an embodiment of the present disclosure. As shown in fig. 13, the method may include, but is not limited to, the following steps:

step 131, sending first indication information, where the first indication information is used to indicate a value of a transmission threshold.

The specific implementation form of step 131 may refer to detailed steps in other embodiments in the present disclosure, and is not described in detail here.

Step 132, determining that the terminal device has started the msg3 retransmission mode, when the number of preamble transmissions sent by the currently received terminal device is greater than the transmission threshold, the RA procedure satisfies 4-step RA in which the random access procedure is not completed, the current RA type is non-2-step RA backoff, the downlink path loss reference point RSRP is less than the reception threshold, and the content retransmission fails.

In the embodiment of the present disclosure, after the network device sends an RAR phase or after a failure of the content resolution, it is determined that the RA procedure is not completed, and the current RA type is 4-step RA, and the current 4-step RA is returned by a 2-step RA fallback, and the terminal device applies msg1-TransMax, and then, in a case that a PREAMBLE _ TRANSMISSION _ COUNTER is msg1-TransMax + msgA-TransMax +1, and the RSRP of the downlink loss reference point is less than a reception threshold, it may be determined that the terminal device has turned on the msg3 retransmission mode.

Optionally, after determining that the 4-step RA process is not completed, the network device may first determine whether the terminal device has already started the msg3 retransmission mode, and further determine whether preset conditions such as 4-step RA in which the current RA type is a non-2-step RA fallback, a downlink path loss reference point RSRP being smaller than a reception threshold, and a current preamble transmission frequency being greater than a sum of msg1-TransMax and msgA-TransMax are satisfied under the condition that the terminal device has not started the msg3 retransmission mode. Thus, resources of the network device can be saved.

Referring to fig. 14, fig. 14 illustrates a coverage enhancement method for a third message repetition based on four-step random access according to the present disclosure, taking an example of supporting a 2-step RA fallback to 4-step RA subsequent turn-on Msg3 retransmission mode. Fig. 14 is a flowchart illustrating a coverage enhancement method based on a third message repetition of four-step random access, which is performed by a network device according to an embodiment of the present disclosure. As shown in fig. 14, the method may include, but is not limited to, the steps of:

step 141, sending first indication information, where the first indication information is used to indicate a value of a transmission threshold.

The specific implementation form of step 141 may refer to detailed steps in other embodiments in the present disclosure, and is not described in detail here.

Step 142, determining that the terminal device has started the msg3 retransmission mode under the condition that the number of preamble transmission times sent by the currently received terminal device is greater than the transmission threshold, the RA process satisfies 4-step RA in which the random access process is not completed, the current RA type is non-2-step RA backoff, the downlink path loss reference point RSRP is less than the reception threshold, and the content retransmission fails.

In the embodiment of the present disclosure, after the network device sends the RAR phase or after the content resolution fails, it determines that the RA procedure is not completed, and the current RA type is 4-step RA, and the current 4-step RA is returned by the 2-step RA fallback, and the terminal device applies msg1-trans max-fallback, and then determines that the terminal device opens the msg3 retransmission mode when the PREAMBLE _ TRANSMISSION _ COUNTER is msg1-trans max-fallback +1, and the downlink loss reference point RSRP is smaller than the reception threshold.

Optionally, after determining that the 4-step RA process is not completed, the network device may first determine whether the msg3repetition mode is already turned on, and further determine whether the current RA type is the 4-step RA with non-2-step RA fallback, the downlink loss reference point RSRP is less than the receiving threshold, and the current preamble transmission frequency is greater than the msg1-trans max-fallback, and the like, under the condition that the msg3repetition mode is not turned on. Thus, resources of the network device can be saved.

Referring to fig. 15, fig. 15 illustrates a coverage enhancement method for a third message repetition based on four-step random access according to the present disclosure, taking an example of supporting a 2-step RA fallback to 4-step RA subsequent turn-on Msg3 retransmission mode. Fig. 15 is a flowchart illustrating a coverage enhancement method based on a third message repetition of four-step random access, where the method is performed by a network device according to an embodiment of the present disclosure. As shown in fig. 15, the method may include, but is not limited to, the following steps:

step 151, sending first indication information, where the first indication information is used to indicate a value of a transmission threshold.

The specific implementation form of step 151 may refer to detailed steps in other embodiments in the present disclosure, and is not described in detail here.

Step 152, when the number of preamble transmission times sent by the currently received terminal device is greater than the transmission threshold, and the RA procedure satisfies 4-step RA in which the random access procedure is not completed, the current RA type is non-2-step RA backoff, the downlink path loss reference point RSRP is less than the reception threshold, and the content failure, it is determined that the terminal device has started the msg3 retransmission mode.

In the embodiment of the present disclosure, after the network device sends the RAR phase or after the content resolution fails, it determines that the RA procedure is not completed, and the current RA type is 4-step RA, and the current 4-step RA is returned by 2-step RA fallback, and the terminal device applies msg1-trans max-fallback, and then determines that the terminal device has turned on the msg3 retransmission mode when PREAMBLE _ transmit _ COUNTER is msgA-trans max + msg1-trans max-fallback +1, and the downlink loss reference point RSRP is smaller than the reception threshold.

Optionally, after determining that the 4-step RA process is not completed, the network device may first determine whether the msg3repetition mode is already turned on, and further determine whether preset conditions such as that the current RA type is a 4-step RA with non-2-step RA fallback, that the downlink loss reference point RSRP is less than a reception threshold, and that the current preamble transmission frequency is greater than the sum of msgA-fransmax and msg 1-fransmax are met, under the condition that the msg3repetition mode is not turned on. Thus, resources of the network device can be saved.

Referring to fig. 16, fig. 16 illustrates a coverage enhancement method for a third message repetition based on four-step random access according to the present disclosure, taking the 2-step RA duration turn-on Msg3repetition mode as an example. Fig. 16 is a flowchart illustrating a coverage enhancement method based on a third message repetition of four-step random access, which is performed by a network device according to an embodiment of the present disclosure. As shown in fig. 16, the method may include, but is not limited to, the following steps:

step 161, sending first indication information, where the first indication information is used to indicate a value of a transmission threshold.

The specific implementation form of step 161 may refer to detailed steps in other embodiments in the present disclosure, and is not described in detail here.

Step 162, determining that the msg3repetition mode is started by the terminal device under the condition that the number of preamble transmission times sent by the currently received terminal device is greater than the transmission threshold, the RA process satisfies that the random access process is not completed, the current RA type is 2step RA, and the downlink path loss reference point RSRP is less than the reception threshold.

In the embodiment of the present disclosure, after the network device sends the MsgB phase or after the content resolution fails, it is determined that the RA process is not completed, and the current RA type is 2step RA, and the terminal device applies msgA-TransMax-CE, and then, under the condition that PREAMBLE _ TRANSMISSION _ COUNTER is msgA-TransMax-CE +1, and the downlink loss reference point RSRP is smaller than the reception threshold, it is determined that the terminal device selects 4-step RA, and the msg3 retransmission mode is turned on.

Optionally, after determining that the RA process is not completed, the network device may first determine whether the msg3repetition mode is already turned on, and further determine whether preset conditions, such as that the current RA type is 2step RA, the downlink path loss reference point RSRP is smaller than the reception threshold, and the current preamble transmission frequency is greater than msgA-TransMax-CE, are met under the condition that the msg3repetition mode is not turned on. Thus, resources of the network device can be saved.

By implementing the embodiment of the disclosure, the network device sends the first indication information of the value of the transmission threshold used for indication to the terminal device, and then determines that the terminal device has started the msg3 retransmission mode under the condition that the preamble transmission times sent by the currently received terminal device is greater than the transmission threshold, the random access process is not completed, the current RA type is 2step RA, and the downlink path loss reference point RSRP is less than the reception threshold, so that the network device can establish connection with the terminal device based on the msg3 repeatedly sent by the terminal device, thereby realizing the coverage enhancement effect.

Referring to fig. 17, fig. 17 is a flowchart illustrating a coverage enhancement method for a third message repetition based on four-step random access according to an embodiment of the present disclosure, where the method is executed by a network device. As shown in fig. 17, the method may include, but is not limited to, the following steps:

and 171, receiving second indication information, wherein the second indication information is used for indicating whether the terminal device supports the msg3 retransmission capability.

Optionally, the second indication information is sent to the network device by the terminal device. The terminal device may report, to the network device through the second indication information, whether the terminal device supports msg3 duplication in all frequency bands. Or, the second indication information may also be used to report to the network device whether each frequency band supports the msg3 retransmission capability. That is, the second indication information may include an identifier of each frequency band and a capability of whether each frequency band supports msg3repetition, which is not limited in this disclosure.

Step 172, sending first indication information, where the first indication information is used to indicate a value of the transmission threshold.

Step 173, in response to that the number of preamble transmission times sent by the currently received terminal device is greater than the transmission threshold and the RA process meets the preset condition, determining that the terminal device has started the msg3repetition mode.

The specific implementation forms of step 172 and step 173 may refer to the detailed steps in other embodiments of the present disclosure, and are not described in detail here.

It can be understood that, in the embodiment of the present disclosure, the network device first receives the capability of whether the terminal device supports msg3 duplication or not, which is sent by the terminal device, and then the network device may indicate the transmission threshold to the terminal device under the condition that the terminal device supports msg3 duplication, thereby saving resources of the network device and channel resources.

By implementing the embodiment of the disclosure, the network device first receives second indication information which is sent by the terminal device and used for indicating whether the terminal device supports msg3 duplication, and then can take the value of a transmission threshold value indicated to the terminal device through the first indication information under the condition that the terminal device supports msg3 duplication, and finally determines that the terminal device opens the msg3 duplication mode under the condition that the currently received preamble transmission times are greater than the transmission threshold value and the RA process meets the preset condition. Therefore, under the conditions that the terminal device supports msg3repetition, the currently received preamble transmission times are greater than the transmission threshold value and the RA process preset condition, the msg3repetition mode is determined to be started by the terminal device, so that the network device can be connected with the terminal device based on the msg3 repeatedly sent by the terminal device, the coverage enhancement effect is achieved, and resources are saved.

In the embodiments provided by the present disclosure, the methods provided by the embodiments of the present disclosure are introduced from the perspective of the network device and the terminal device, respectively. In order to implement the functions in the method provided by the embodiment of the present disclosure, the network device and the terminal device may include a hardware structure and a software module, and the functions are implemented in the form of a hardware structure, a software module, or a hardware structure and a software module. Some of the above functions may be implemented by 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 according to an embodiment of the present disclosure. The communications device 180 shown in fig. 18 may include a processing module 1801 and a transceiver module 1802.

The transceiver module 1802 may include a transmitting module and/or a receiving module, the transmitting module is configured to implement a transmitting function, the receiving module is configured to implement a receiving function, and the transceiver module 1802 may implement a transmitting function and/or a receiving function.

It is understood that the communication device 180 may be a terminal device, a device in the terminal device, or a device capable of being used with the terminal device.

Communication apparatus 180, on the terminal device side, comprising:

a processing module 1801, configured to start a repeat repetition mode of a third message msg3 in response to that the number of transmission times of the current preamble is greater than a transmission threshold and a random access RA procedure meets a preset condition.

Optionally, the number of transmission times of the current preamble is greater than the transmission threshold, and is any of the following items:

Optionally, the method further includes:

the transceiver module 1802 is configured to receive first indication information, where the first indication information is used to indicate a value of a transmission threshold.

Optionally, the transceiver module 1802 is specifically configured to:

receiving first indication information through a broadcast message;

or,

the first indication information is received through a radio resource control, RRC, message.

Optionally, the first indication information is further used to indicate a cell identifier corresponding to the transmission threshold, or a bandwidth portion BWP identifier corresponding to the transmission threshold.

Optionally, the preset condition includes at least one of the following:

the random access procedure is not completed;

the current RA type is 2step RA;

the current RA type is 4step RA which is not 2step RA rollback;

contention resolution failure;

the current RA type is a 4-step RA backed by a 2-step RA;

Optionally, the transceiver module 1802 is further specifically configured to:

Optionally, the capability of whether the terminal device supports msg3repetition includes at least one of:

According to the communication device provided by the disclosure, the terminal device can start the third message msg3repetition mode under the condition that the current preamble transmission times is greater than the transmission threshold and the random access RA process meets the preset condition, so that the coverage enhancement effect is realized.

It is understood that the communication device 180 may be a network device, may be a device in the network device, or may be a device capable of being used in cooperation with the network device.

Communication apparatus 180, on the network device side, comprising:

a processing module 1801, configured to determine that the terminal device has started a repeat repetition mode of the third message msg3, in response to that the number of transmission times of the preamble sent by the currently received terminal device is greater than the transmission threshold and that the random access RA procedure meets the preset condition.

Optionally, the method further includes:

the transceiver module 1802 is configured to send first indication information, where the first indication information is used to indicate a value of a transmission threshold.

Optionally, the transceiver module 1802 is specifically configured to:

transmitting first indication information through a broadcast message;

or,

Optionally, the preset condition includes at least one of the following:

the random access procedure is not completed;

the current RA type is 2step RA;

the current RA type is 4step RA which is not 2step RA rollback;

contention resolution failure;

the current RA type is a 4-step RA backed by a 2-step RA;

Optionally, the transceiver module 1802 is further specifically configured to:

According to the communication device provided by the disclosure, the network device can determine that the terminal device starts the repeat repetition mode of the third message msg3 when the transmission times of the preamble preamb e sent by the currently received terminal device is greater than the transmission threshold and the RA process meets the preset condition, so that the network device can establish connection with the terminal device based on the msg3 repeatedly sent by the terminal device, and further the coverage enhancement effect is realized.

Referring to fig. 19, fig. 19 is a schematic structural diagram of another communication device 190 according to an embodiment of the disclosure. The communication device 190 may be a network device, a terminal device, a chip, a system-on-chip, or a processor that supports the network device to implement the method, or a chip, a system-on-chip, or a processor that supports the terminal device to implement the method. The apparatus may be configured to implement the method described in the method embodiment, and refer to the description in the method embodiment.

The communication device 190 may include one or more processors 1901. The processor 1901 may be a general-purpose processor or a special-purpose processor, or the like. For example, a baseband processor or a central processor. The baseband processor may be configured to process communication protocols and communication data, and the central processor may be configured to control a communication device (e.g., a base station, a baseband chip, a terminal device chip, a DU or CU, etc.), execute a computer program, and process data of the computer program.

Optionally, 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 to make the communication device 190 execute the method described in the above method embodiments. Optionally, the memory 1902 may further store data therein. The communication device 190 and the memory 1902 may be separate or integrated.

Optionally, the communication device 190 may further include a transceiver 1905 and an antenna 1906. The transceiver 1905 may be referred to as a transceiver unit, a transceiver, or a transceiver circuit, etc. for implementing a transceiving function. The transceiver 1905 may include a receiver and a transmitter, and the receiver may be referred to as a receiver or a receiving circuit, etc. for implementing a receiving function; the transmitter may be referred to as a transmitter or a transmission circuit, etc. for implementing the transmission function.

Optionally, one or more interface circuits 1907 may also be included in communications device 190. The interface circuit 1907 is used for receiving code instructions and transmitting them to the processor 1901. The processor 1901 executes the code instructions to cause the communication device 190 to perform the methods described in the above method embodiments.

The communication device 190 is a terminal apparatus: the processor 1901 is configured to perform 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 perform step 31 in fig. 3; step 41 in fig. 4; or step 51 in fig. 5, etc.

The communication device 190 is a network device: the processor 1901 is configured to perform step 101 in fig. 10; step 112 in FIG. 11; or step 122 in FIG. 12, etc.; the transceiver 1905 is used to perform step 111 in fig. 11; step 121 in fig. 12; step 131 in fig. 13; or step 141 in fig. 14, etc.

In one implementation, a transceiver may be included in the processor 1901 for performing receive and transmit functions. The transceiver may be, for example, a transceiver circuit, or an interface circuit. The transmit and receive circuitry, interfaces or interface circuitry used to implement the receive and transmit functions may be separate or integrated. The transceiver circuit, the interface circuit or the interface circuit may be used for reading and writing code/data, or the transceiver circuit, the interface circuit or the interface circuit may be used for transmitting or transferring signals.

In one implementation, the processor 1901 may store a computer program 1903, and the computer program 1903 running on the processor 1901 may cause the communication device 190 to perform the method described in the above method embodiment. The computer program 1903 may be resident in the processor 1901, in which case the processor 1901 may be implemented in hardware.

In one implementation, the communication device 190 may include circuitry that may implement the functionality of transmitting or receiving or communicating in the foregoing method embodiments. The processors and transceivers described in this disclosure may be implemented on Integrated Circuits (ICs), analog ICs, Radio Frequency Integrated Circuits (RFICs), mixed signal ICs, Application Specific Integrated Circuits (ASICs), Printed Circuit Boards (PCBs), electronic devices, and the like. The processor and transceiver may also be fabricated using various IC process technologies, such as Complementary Metal Oxide Semiconductor (CMOS), N-type metal oxide semiconductor (NMOS), P-type metal oxide semiconductor (PMOS), Bipolar Junction Transistor (BJT), bipolar CMOS (bicmos), silicon germanium (SiGe), gallium arsenide (GaAs), and the like.

The communication apparatus in the above description of the embodiment may be a network device or a terminal device, but the scope of the communication apparatus described in the present disclosure is not limited thereto, and the structure of the communication apparatus may not be limited by fig. 19. The communication means may be a stand-alone device or may be part of a larger device. For example, the communication means may be:

(1) a stand-alone integrated circuit IC, or chip, or system-on-chip or subsystem;

(2) a set of one or more ICs, which optionally may also include storage means for storing data, computer programs;

(3) an ASIC, such as a Modem (Modem);

(4) a module that may be embedded within other devices;

(5) receivers, terminal devices, smart terminal devices, cellular phones, wireless devices, handsets, mobile units, in-vehicle devices, network devices, cloud devices, artificial intelligence devices, and the like;

(6) others, and so forth.

For the case that the communication device may be a chip or a chip system, see 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 the processors 2001 may be one or more, and the number of the interfaces 2002 may be plural.

For the case that the chip is used for realizing the functions of the terminal device in the embodiments of the present disclosure:

a processor 2001 for performing step 21 in fig. 2; step 32 in fig. 3; step 42 in FIG. 4; step 52 in fig. 5, and so on.

An interface 2002 for performing step 31 in fig. 3; step 41 in fig. 4; or step 51 in fig. 5, etc.

For the case where the chip is used to implement the functions of the network device in the embodiments of the present disclosure:

a processor 2001 for executing step 101 in fig. 10; step 112 in FIG. 11; or step 122 in fig. 12, and so on.

An interface 2002 for performing step 111 in FIG. 11; step 121 in fig. 12; step 131 in fig. 13; or step 141 in fig. 14, etc.

Optionally, the chip further comprises a memory 2003, the memory 2003 being for storing necessary computer programs and data.

Those of skill in the art will also appreciate that the various illustrative logical blocks and steps (step) set forth in the embodiments of the disclosure may be implemented in electronic hardware, computer software, or combinations of both. Whether such functionality is implemented as hardware or software depends upon the particular application and design requirements of the overall system. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the disclosed embodiments.

The embodiment of the present disclosure further provides a communication system, where the system includes the communication apparatus serving as the terminal device and the communication apparatus serving as the network device in the foregoing fig. 18 embodiment, or the system includes the communication apparatus serving as the terminal device and the communication apparatus serving as the network device in the foregoing fig. 19 embodiment.

The present disclosure also provides a computer-readable storage medium having stored thereon instructions which, when executed by a computer, implement the functionality of any of the above-described method embodiments.

The present disclosure also provides a computer program product which, when executed by a computer, implements the functionality of any of the above-described method embodiments.

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer programs. The procedures or functions according to the embodiments of the present disclosure are wholly or partially generated when the computer program is loaded and executed on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer program can be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer program can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wire (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a Digital Video Disc (DVD)), or a semiconductor medium (e.g., a Solid State Disk (SSD)), etc.

Those of ordinary skill in the art will understand that: the various numbers of the first, second, etc. involved in this disclosure are merely for convenience of description and distinction, and are not intended to limit the scope of the embodiments of the disclosure, but also to indicate the order of precedence.

At least one of the present disclosure may also be described as one or more, and a plurality may be two, three, four or more, without limitation of the present disclosure. In the embodiment of the present disclosure, for a technical feature, the technical features in the technical feature are distinguished by "first", "second", "third", "a", "B", "C", and "D", and the like, and the technical features described in "first", "second", "third", "a", "B", "C", and "D" are not in the order of priority or magnitude.

It should be understood that although the terms first, second, third, etc. may be used in the embodiments of the present application to describe various information, the information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, the first information may also be referred to as second information, and similarly, the second information may also be referred to as first information, without departing from the scope of the embodiments of the present application. As used herein, the words "if" and "if" may be interpreted as "at … …" or "when … …" or "in response to a determination" or "under … …".

The correspondence shown in the tables in the present disclosure may be configured or predefined. The values of the information in each table are only examples, and may be configured as other values, and the disclosure is not limited thereto. When the correspondence between the information and each parameter is configured, it is not always necessary to configure all the correspondences indicated in each table. For example, in the table in the present disclosure, the correspondence relationship shown by some rows may not be configured. For another example, appropriate modification adjustments, such as splitting, merging, etc., can be made based on the above tables. The names of the parameters in the tables may be other names understandable by the communication device, and the values or the expression of the parameters may be other values or expressions understandable by the communication device. When the above tables are implemented, other data structures may be used, for example, arrays, queues, containers, stacks, linear tables, pointers, linked lists, trees, graphs, structures, classes, heaps, hash tables, or hash tables may be used.

Predefinition in this disclosure may be understood as defining, predefining, storing, pre-negotiating, pre-configuring, curing, or pre-firing.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present disclosure.

It is further to be understood that while operations are depicted in the drawings in a particular order, this is not to be understood as requiring that such operations be performed in the particular order shown or in serial order, or that all illustrated operations be performed, to achieve desirable results. In certain environments, multitasking and parallel processing may be advantageous.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

The above description is only for the specific embodiments of the present disclosure, but the scope of the present disclosure is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present disclosure, and all the changes or substitutions should be covered within the scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.

Claims

1. A coverage enhancement method for a third message repetition based on four-step random access, which is performed by a terminal device, the method comprising:

and in response to that the transmission times of the current preamble are larger than the transmission threshold and the random access RA process meets the preset condition, starting a repeat mode of a third message msg 3.

2. The method of claim 1, wherein the current preamble transmission number is greater than a transmission threshold, and is any one of:

the preamble transmission times in the two-step 2stepRA process are greater than the maximum transmission times of the message A MsgA;

3. The method according to any of claims 1-2, wherein the preset conditions include at least one of:

the random access procedure is not completed;

the current RA type is 2step RA;

the current RA type is 4step RA which is not 2step RA rollback;

contention resolution failure;

the current RA type is a 4-step RA backed by a 2-step RA;

4. The method of any of claims 1-3, further comprising:

and sending second indication information, wherein the second indication information is used for indicating whether the terminal equipment supports msg3 retransmission.

5. The method of claim 4, wherein the capability of whether the terminal device supports msg3 duplication comprises at least one of:

whether the terminal equipment supports the msg3 retransmission capacity under the condition of returning from 2step RA to 4step RA;

and whether the terminal equipment supports the msg3 retransmission capability in each frequency band or not.

6. A coverage enhancement method for a third message repetition based on four-step random access, performed by a network device, the method comprising:

7. The method of claim 6, wherein the current preamble transmission number is greater than a transmission threshold, and is any one of:

the preamble transmission times in the two-step 2step random access RA process are larger than the maximum transmission times of the message A MsgA;

8. The method according to any of claims 6-7, wherein the preset conditions include at least one of:

the random access procedure is not completed;

the current RA type is 2step RA;

the current RA type is 4step RA which is not 2step RA rollback;

contention resolution failure;

the current RA type is a 4-step RA backed by a 2-step RA;

9. The method of any of claims 6-8, further comprising:

and receiving second indication information, wherein the second indication information is used for indicating whether the terminal equipment supports msg3 retransmission.

10. The method of claim 9, wherein the capability of whether the terminal device supports msg3 duplication comprises at least one of:

11. A communication apparatus, characterized in that the apparatus is on a terminal device side, the apparatus comprising:

and the processing module is used for responding to the fact that the transmission times of the current lead code preamble are larger than the transmission threshold value and the random access RA process meets the preset condition, and starting a repeat repetition mode of a third message msg 3.

12. The apparatus of claim 11, wherein the current preamble transmission number is greater than a transmission threshold, and is any one of:

13. The apparatus according to any of claims 11-12, wherein the preset condition comprises at least one of:

the random access procedure is not completed;

the current RA type is 2step RA;

the current RA type is 4step RA which is not 2step RA rollback;

contention resolution failure;

the current RA type is a 4-step RA backed by a 2-step RA;

14. The apparatus according to any of claims 11-13, wherein the transceiver module is further specifically configured to:

15. The apparatus of claim 14, wherein the capability of whether the terminal device supports msg3 duplication comprises at least one of:

16. A communications apparatus, the apparatus being on a network device side, the apparatus comprising:

and the processing module is used for determining that the terminal equipment starts a repeat repetition mode of a third message msg3 in response to that the currently received transmission times of the preamble sent by the terminal equipment are greater than a transmission threshold and the random access RA process meets a preset condition.

17. The apparatus of claim 16, wherein the current preamble transmission number is greater than a transmission threshold, and is any one of:

18. The apparatus according to any of claims 16-17, wherein the preset condition comprises at least one of:

the random access procedure is not completed;

the current RA type is 2step RA;

the current RA type is 4step RA which is not 2step RA rollback;

contention resolution failure;

the current RA type is a 4-step RA backed by a 2-step RA;

19. The apparatus according to any of claims 17-18, wherein the transceiver module is further specifically configured to:

20. The apparatus of claim 19, wherein the capability of whether the terminal device supports msg3 duplication comprises at least one of:

21. A communications apparatus, comprising a processor and a memory, the memory having stored therein a computer program, the processor executing the computer program stored in the memory to cause the apparatus to perform the method of any of claims 1 to 5.

22. A communications apparatus, comprising a processor and a memory, the memory having stored therein a computer program, the processor executing the computer program stored in the memory to cause the apparatus to perform the method of any of claims 6 to 10.

23. A communications apparatus, comprising: a processor and an interface circuit;

the interface circuit is used for receiving code instructions and transmitting the code instructions to the processor;

the processor to execute the code instructions to perform the method of any one of claims 1 to 5.

24. A communications apparatus, comprising: a processor and an interface circuit;

the processor for executing the code instructions to perform the method of any one of claims 6 to 10.

25. A computer-readable storage medium storing instructions that, when executed, cause the method of any of claims 1-5 to be implemented.

26. A computer readable storage medium storing instructions that, when executed, cause the method of any of claims 6 to 10 to be implemented.