CN117596705B

CN117596705B - Communication method, terminal, network device, communication system, and storage medium

Info

Publication number: CN117596705B
Application number: CN202410082547.4A
Authority: CN
Inventors: 江小威; 陈波
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2024-01-19
Filing date: 2024-01-19
Publication date: 2024-04-30
Anticipated expiration: 2044-01-19
Also published as: CN117596705A

Abstract

The present disclosure relates to the field of communication technologies, and relates to a communication method, a terminal, a network device, a communication system, and a storage medium. The method executed by the terminal comprises the following steps: determining whether to perform a first operation for an nth random access channel RACH attempt in a random access procedure, the first operation including sending first information to a network device, the first information being used to assist the network device in determining a number of retransmissions of second information, the second information being information sent by the network device to the terminal in the nth RACH attempt procedure, wherein N is a natural number greater than 0; and initiating the Nth RACH attempt, and selecting random access resources to send random access lead codes to the network equipment according to the determined result. By adopting the method, the random access performance can be improved.

Description

Communication method, terminal, network device, communication system, and storage medium

Technical Field

The present disclosure relates to the field of communications technologies, and in particular, to a communications method, a terminal, a network device, a communications system, and a storage medium.

Background

Downstream coverage problems exist whether it is a non-terrestrial network (Non Terrestrial Network, NTN) or a terrestrial network (TERRESTRIAL NETWORK, TN). For the NTN network, since the satellite is higher from the ground, the problem of downlink coverage of the NTN network is more serious than that of the TN network, and research on an enhancement scheme of downlink coverage is needed.

Disclosure of Invention

The embodiment of the disclosure provides a communication method, a terminal, network equipment, a communication system and a storage medium.

According to a first aspect of embodiments of the present disclosure, a communication method is provided, which is performed by a terminal, the method including:

Determining whether to perform a first operation for an nth random access channel RACH attempt in a random access procedure, the first operation including sending first information to a network device, the first information being used to assist the network device in determining a number of retransmissions of second information, the second information being information sent by the network device to the terminal in the nth RACH attempt procedure, wherein N is a natural number greater than 0; and initiating the Nth RACH attempt, and selecting random access resources to send random access lead codes to the network equipment according to the determined result.

According to a second aspect of the embodiments of the present disclosure, there is provided a communication method performed by a network device, the method comprising:

Responding to a random access preamble sent by a terminal aiming at an Nth RACH attempt in a random access process, wherein the random access preamble is sent by a random access resource selected by the terminal according to a determination result of whether to execute a first operation aiming at the Nth RACH attempt; the first operation includes that the terminal sends first information to the network device, the first information is used for assisting the network device to determine retransmission times of second information, the second information is information sent to the terminal by the network device in the process of the Nth RACH attempt, and N is a natural number greater than 0.

According to a third aspect of embodiments of the present disclosure, there is provided a terminal, including:

A first processing module, configured to determine whether to perform a first operation for an nth random access channel RACH attempt in a random access procedure, where the first operation includes sending first information to a network device, where the first information is used to assist the network device in determining a number of retransmissions of second information, where the second information is information sent by the network device to the terminal in the nth RACH attempt procedure, and N is a natural number greater than 0;

And the first transceiver module is used for initiating the Nth RACH attempt, selecting random access resources according to the determined result and sending a random access preamble to the network equipment.

According to a fourth aspect of embodiments of the present disclosure, there is provided a network device, comprising:

A second processing module, configured to respond to a random access preamble sent by a terminal for an nth RACH attempt in a random access procedure, where the random access preamble is sent by the terminal according to a random access resource selected according to a determination result of whether to perform a first operation for the nth RACH attempt; the first operation includes that the terminal sends first information to the network device, the first information is used for assisting the network device to determine retransmission times of second information, the second information is information sent to the terminal by the network device in the process of the Nth RACH attempt, and N is a natural number greater than 0.

According to a fifth aspect of embodiments of the present disclosure, there is provided a terminal, including: one or more first processors; a first memory coupled to the first processor, the first memory having stored thereon executable instructions that, when executed by the first processor, cause the terminal to perform the communication method of the first aspect.

According to a sixth aspect of embodiments of the present disclosure, there is provided a network device, comprising: one or more second processors; a second memory coupled to the second processor, the second memory having stored thereon executable instructions that, when executed by the second processor, cause the network device to perform the communication method of the second aspect.

According to a seventh aspect of the embodiments of the present disclosure, a communication system is provided, including a terminal configured to implement the communication method described in the first aspect, and a network device configured to implement the communication method described in the second aspect.

According to an eighth aspect of the embodiments of the present disclosure, a storage medium is provided, the storage medium storing instructions that, when executed on a communication device, cause the communication device to perform the communication method according to the first or second aspect.

By adopting the technical scheme, whether the first operation is executed or not can be determined for each RACH attempt in the RACH flow, so that corresponding RACH resources are selected according to the determination result to assist the network equipment in improving the downlink coverage performance, and further, the random access performance is improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following description of the embodiments refers to the accompanying drawings, which are only some embodiments of the present disclosure, and do not limit the protection scope of the present disclosure in any way.

Fig. 1 is a schematic architecture diagram of a communication system shown in accordance with an embodiment of the present disclosure.

Fig. 2 is an interactive schematic diagram of a communication method shown in accordance with an embodiment of the present disclosure.

Fig. 3 is a flow diagram illustrating a communication method according to an embodiment of the present disclosure.

Fig. 4 is a flow diagram illustrating a communication method according to an embodiment of the present disclosure.

Fig. 5 is a flow diagram illustrating a communication method according to an embodiment of the present disclosure.

Fig. 6 is a flow diagram illustrating a communication method according to an embodiment of the present disclosure.

Fig. 7 is an interactive schematic diagram of a communication method shown according to an embodiment of the disclosure.

Fig. 8 is a flow diagram illustrating a communication method according to an embodiment of the present disclosure.

Fig. 9 is a flow diagram of a communication method shown in accordance with an embodiment of the present disclosure.

Fig. 10 is a schematic structural diagram of a terminal according to an embodiment of the present disclosure.

Fig. 11 is a schematic structural diagram of a network device according to an embodiment of the present disclosure.

Fig. 12 is a schematic structural diagram of a communication device according to an embodiment of the present disclosure.

Fig. 13 is a schematic structural diagram of a chip according to an embodiment of the present disclosure.

Detailed Description

In a first aspect, an embodiment of the present disclosure proposes a communication method, performed by a terminal, the method including: determining whether to perform a first operation for an nth random access channel RACH attempt in a random access procedure, the first operation including sending first information to a network device, the first information being used to assist the network device in determining a number of retransmissions of second information, the second information being information sent by the network device to the terminal in the nth RACH attempt procedure, wherein N is a natural number greater than 0; and initiating the Nth RACH attempt, and selecting random access resources to send random access lead codes to the network equipment according to the determined result.

In the above embodiment, the terminal determines whether to execute the first operation for each RACH attempt in the RACH procedure, and further selects a corresponding RACH resource to transmit the random access preamble according to the determination result, so that the network device can be assisted to determine the number of retransmissions of the second information in the RACH attempt process more accurately, so as to accurately improve the downlink coverage performance of the network device, and further improve the random access performance.

With reference to some embodiments of the first aspect, in some embodiments, the second information includes at least one of the following transmitted based on a physical downlink control channel PDCCH and/or a physical downlink shared channel PDSCH:

message Msg 2;

Message Msg 4;

message Msg B.

In the above embodiment, by adopting the technical scheme of the present disclosure, the downlink coverage capability of at least one downlink signal of Msg 2, msg 4, msg B sent through PDCCH and/or PDSCH may be improved.

With reference to some embodiments of the first aspect, in some embodiments, the first information includes a parameter value of at least one of the following parameter items:

a first parameter item, configured to indicate downlink signal quality;

a second parameter item for indicating the number of retransmissions recommended by the terminal;

And a third parameter item, configured to indicate whether the terminal supports a function of retransmitting the second information by the network device.

In the above embodiment, the network device may be assisted to more accurately determine whether to retransmit the second information to the terminal and the number of retransmissions of the second information by providing the network device with the downlink signal quality, the number of retransmissions recommended by the terminal, and the function of whether the terminal supports the network device to retransmit the second information, so as to accurately improve the downlink coverage performance of the network device.

With reference to some embodiments of the first aspect, in some embodiments, in a case where it is determined to perform the first operation, the first information is carried in a message Msg 1 or a message Msg a to be sent to the network device.

Optionally, determining to perform the first operation, and sending the first information to the network device through a message Msg 1 or a message Msg a.

In some embodiments, the first information may be sent to the network device through the Msg 1 or the Msg a, which not only may improve the utilization rate of the Msg 1 or the Msg a, but also may avoid extra resource overhead caused by the terminal sending the first information additionally.

With reference to some embodiments of the first aspect, in some embodiments, the access manner of the RACH attempt includes at least one of:

contention-based random access CBRA;

Non-contention random access, CFRA;

STEP 2, randomly accessing 2-STEP RA;

4-STEP RA。

in the above embodiment, since the technical solution of the present disclosure is applicable to RACH attempts in various access manners, the technical solution of the present disclosure has strong applicability and is easy to implement.

With reference to some embodiments of the first aspect, in some embodiments, before the determining whether to perform the first operation for an nth RACH attempt in a random access procedure, the determining includes: determining whether to execute the first operation or not for each access mode respectively;

the determining whether to perform the first operation for an nth RACH attempt in a random access procedure includes: and determining the determination result according to the access mode corresponding to the Nth RACH attempt.

In the above embodiment, a determination method is provided that can determine whether to perform the first operation for the RACH attempt according to the access manner corresponding to the RACH attempt.

With reference to some embodiments of the first aspect, in some embodiments, the first information including different parameter values corresponds to different random access resources;

the initiating the nth RACH attempt, selecting a random access resource according to a determination result, and transmitting a random access preamble to the network device, including: and determining corresponding random access resources according to the parameter values in the first information, and sending a random access preamble.

In the above embodiment, by setting the first information including different parameter values to correspond to different random access resources, it is convenient for the network device to distinguish the first information including different contents based on the different random access resources, so that the access efficiency of RACH attempt can be improved.

With reference to some embodiments of the first aspect, in some embodiments, the determining whether to perform the first operation for an nth RACH attempt in a random access procedure includes: it is determined in a random access initialization phase whether to perform the first operation for a first RACH attempt.

In the above embodiment, it is specified that it may be determined in the random access initialization phase whether to perform the first operation for the first RACH attempt.

With reference to some embodiments of the first aspect, in some embodiments, the determining whether to perform the first operation for an nth RACH attempt in a random access procedure includes: it is determined in a random access initialization phase whether to perform the first operation for a non-first RACH attempt.

In the above embodiment, it is specified that it may be determined in the random access initialization phase whether to perform the first operation for the non-first RACH attempt.

With reference to some embodiments of the first aspect, in some embodiments, the method further includes: and determining to execute the first operation, and determining parameter values in the first information in a random access initialization stage.

In the above-described embodiment, it is specified that when it is determined in the random access initialization phase that the first operation is performed for the first/non-first RACH attempt, the content of the first information corresponding to the first/non-first RACH attempt may be determined in the random access initialization phase.

With reference to some embodiments of the first aspect, in some embodiments, the determining whether to perform the first operation for an nth RACH attempt in a random access procedure includes: for a non-first RACH attempt, before initiating the non-first RACH attempt, it is determined whether to perform the first operation for the non-first RACH attempt.

In the above embodiment, it may also be determined, before initiating the non-first RACH attempt, whether to perform the first operation for the non-first RACH attempt.

With reference to some embodiments of the first aspect, in some embodiments, the first operation further includes updating the first information;

the determining whether to perform the first operation for the non-first RACH attempt includes: for the non-first RACH attempt, a determination is made as to whether to update the parameter values in the first information.

In the above embodiment, normalizing the first operation may include updating the first information. Accordingly, an embodiment of determining whether to perform the first operation for a non-first RACH attempt may include: for non-first RACH attempts, it is determined whether to update the parameter values in the first information.

With reference to some embodiments of the first aspect, in some embodiments, before determining whether to perform the first operation for the non-first RACH attempt, includes:

Determining that a first condition is satisfied, the first condition comprising at least one of:

the access mode of RACH attempt is switched from CFRA to CBRA;

the RACH attempted access mode is switched from 2-STEP RA to 4-STEP RA;

the number of RACH attempts reaches a first specified number;

the number of retransmissions of the message Msg 1 is changed.

In the above embodiment, it is provided that the determination of whether to perform the first operation for the non-first RACH attempt can be triggered at various occasions, extending the application occasions of the scheme.

With reference to some embodiments of the first aspect, in some embodiments, the determining, for the non-first RACH attempt, whether to update a parameter value in the first information includes: updating the number of retransmission times of the terminal in the first information corresponding to the non-first RACH attempt, wherein the number of retransmission times of the terminal in the updated first information is greater than the number of retransmission times of the terminal in the first information transmitted last time, and/or the number of retransmission times of the terminal in the updated first information is greater than the number of retransmission times of the second information in the process of the last RACH attempt of the non-first RACH attempt.

In the above embodiment, when updating the number of retransmissions recommended by the terminal in the first information corresponding to the non-first RACH attempt, the number of retransmissions recommended by the terminal in the updated first information may be made larger than the number of retransmissions recommended by the terminal in the first information transmitted last time, and/or the number of retransmissions recommended by the terminal in the updated first information may be made larger than the actual number of retransmissions of the second information in the process of the last RACH attempt of the non-first RACH attempt, so as to improve the access success rate of the non-first RACH attempt and improve the performance of random access.

With reference to some embodiments of the first aspect, in some embodiments, before updating the number of retransmissions recommended by the terminal in the first information corresponding to the non-first RACH attempt, the method includes: receiving third information sent by the network equipment, wherein the third information is used for configuring a candidate retransmission time sequence; determining a minimum candidate retransmission number greater than the retransmission number recommended by the terminal in the first information transmitted last time from the candidate retransmission number sequence;

The updating the retransmission times recommended by the terminal in the first information corresponding to the non-first RACH attempt includes: and updating the retransmission times recommended by the terminal in the first information corresponding to the non-first RACH attempt according to the minimum candidate retransmission times.

In the above embodiment, the number of retransmissions recommended by the terminal in the first information corresponding to the non-first RACH attempt may be updated according to the candidate retransmission number sequence configured by the network device, so as to improve the access success rate of the non-first RACH attempt and improve the performance of random access.

With reference to some embodiments of the first aspect, in some embodiments, the third information is any one of the following:

system message block SIB 1;

SIB 19；

A radio resource control, RRC, reconfiguration message.

In the above embodiment, it is specified that the network device can configure the candidate retransmission number sequence to the terminal through at least one of SIB 1, SIB 19, RRC reconfiguration message.

With reference to some embodiments of the first aspect, in some embodiments, before updating the number of retransmissions recommended by the terminal in the first information corresponding to the non-first RACH attempt, the method includes:

receiving fourth information sent by the network equipment; determining the retransmission times of the second information in the process of the last RACH attempt of the non-first RACH attempt according to the fourth information;

The updating the retransmission times recommended by the terminal in the first information corresponding to the non-first RACH attempt includes: and updating the recommended retransmission times of the terminal in the first information corresponding to the non-first RACH attempt according to a value larger than the retransmission times of the second information.

In the above embodiment, the number of retransmissions recommended by the terminal in the first information corresponding to the non-first RACH attempt may be determined according to the actual number of retransmissions of the second information in the process of the last RACH attempt of the non-first RACH attempt, so as to improve the access success rate of the non-first RACH attempt and improve the performance of random access.

With reference to some embodiments of the first aspect, in some embodiments, the fourth information is any one of the following:

SIB 1；

SIB 19；

RRC reconfiguration message.

In the above embodiment, the actual number of retransmissions of the second information in the process that the network device may send the last RACH attempt to the terminal through at least one of SIB 1, SIB 19, RRC reconfiguration message is specified.

With reference to some embodiments of the first aspect, in some embodiments, before updating the number of retransmissions recommended by the terminal in the first information corresponding to the non-first RACH attempt, the method includes: and determining that the number of retransmission times suggested by the terminal in the first information transmitted last time is smaller than a second designated number.

In the above embodiment, the upper limit of the number of retransmissions recommended by the terminal in the first information is normalized.

In a second aspect, embodiments of the present disclosure propose a communication method performed by a network device, the method comprising: responding to a random access preamble sent by a terminal aiming at an Nth RACH attempt in a random access process, wherein the random access preamble is sent by a random access resource selected by the terminal according to a determination result of whether to execute a first operation aiming at the Nth RACH attempt; the first operation includes that the terminal sends first information to the network device, the first information is used for assisting the network device to determine retransmission times of second information, the second information is information sent to the terminal by the network device in the process of the Nth RACH attempt, and N is a natural number greater than 0.

In a third aspect, an embodiment of the present disclosure proposes a terminal, where the terminal includes at least one of a first transceiver module and a first processing module; wherein the terminal is configured to perform the optional implementation manner of the first aspect.

In a fourth aspect, an embodiment of the present disclosure proposes a network device, where the network device includes at least one of a second transceiver module and a second processing module; wherein the network device is configured to perform the optional implementation manner of the second aspect.

In a fifth aspect, an embodiment of the present disclosure proposes a terminal, including: one or more first processors; a first memory coupled to the first processor, the first memory having stored thereon executable instructions that, when executed by the first processor, cause the terminal to perform the communication method of any of the first aspects.

In a sixth aspect, embodiments of the present disclosure provide a network device, including: one or more second processors; a second memory coupled to the second processor, the second memory having stored thereon executable instructions that, when executed by the second processor, cause the network device to perform the communication method of the second aspect.

In a seventh aspect, an embodiment of the present disclosure proposes a communication system, including: a terminal configured to perform a method as described in the alternative implementation of the first aspect, and a network device configured to perform a method as described in the alternative implementation of the second aspect.

In an eighth aspect, embodiments of the present disclosure provide a storage medium storing instructions that, when executed on a communication device, cause the communication device to perform a method as described in the first aspect, and in alternative implementations of the second aspect.

In a ninth aspect, embodiments of the present disclosure propose a program product which, when executed by a communication device, causes the communication device to perform a method as described in the first aspect, and in alternative implementations of the second aspect.

In a tenth aspect, the presently disclosed embodiments propose a computer program which, when run on a computer, causes the computer to carry out the method as described in the first aspect, and in alternative implementations of the second aspect.

In an eleventh aspect, embodiments of the present disclosure provide a chip or chip system. The chip or chip system comprises a processing circuit configured to perform the method described in accordance with the alternative implementations of the first and second aspects described above.

It will be appreciated that the above-described terminal, network device, communication system, storage medium, program product, computer program, chip or chip system are all adapted to perform the methods set forth in the embodiments of the present disclosure. Therefore, the advantages achieved by the method can be referred to as the advantages of the corresponding method, and will not be described herein.

The embodiment of the disclosure provides a communication method, a terminal, network equipment, a communication system and a storage medium. In some embodiments, terms such as a communication method and an information processing method, a method of determining whether each random access attempt reselects RACH resources, and the like may be replaced with terms such as a communication system and an information processing system, a system of determining whether each random access attempt reselects RACH resources, and the like.

The embodiments of the present disclosure are not intended to be exhaustive, but rather are exemplary of some embodiments and are not intended to limit the scope of the disclosure. In the case of no contradiction, each step in a certain embodiment may be implemented as an independent embodiment, and the steps may be arbitrarily combined, for example, a scheme in which part of the steps are removed in a certain embodiment may also be implemented as an independent embodiment, the order of the steps in a certain embodiment may be arbitrarily exchanged, and further, alternative implementations in a certain embodiment may be arbitrarily combined; furthermore, various embodiments may be arbitrarily combined, for example, some or all steps of different embodiments may be arbitrarily combined, and an embodiment may be arbitrarily combined with alternative implementations of other embodiments.

In the various embodiments of the disclosure, terms and/or descriptions of the various embodiments are consistent throughout the various embodiments and may be referenced to each other in the absence of any particular explanation or logic conflict, and features from different embodiments may be combined to form new embodiments in accordance with their inherent logic relationships.

The terminology used in the embodiments of the disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure.

In the presently disclosed embodiments, elements that are referred to in the singular, such as "a," "an," "the," "said," etc., may mean "one and only one," or "one or more," "at least one," etc., unless otherwise indicated. For example, where an article (article) is used in translation, such as "a," "an," "the," etc., in english, a noun following the article may be understood as a singular expression or as a plural expression.

In the presently disclosed embodiments, "plurality" refers to two or more.

In some embodiments, terms such as "at least one of", "one or more of", "multiple of" and the like may be substituted for each other.

In some embodiments, "A, B" at least one of "," a and/or B "," a in one case, B in another case "," a in response to one case, B "in response to another case, etc., may include the following technical solutions, as appropriate: in some embodiments a (a is performed independently of B); b (B is performed independently of a) in some embodiments; in some embodiments, execution is selected from a and B (a and B are selectively executed); in some embodiments a and B (both a and B are performed). Similar to the above when there are more branches such as A, B, C.

In some embodiments, the description modes such as "a or B" may include the following technical schemes according to circumstances: in some embodiments a (a is performed independently of B); b (B is performed independently of a) in some embodiments; in some embodiments execution is selected from a and B (a and B are selectively executed). Similar to the above when there are more branches such as A, B, C.

The prefix words "first", "second", etc. in the embodiments of the present disclosure are only for distinguishing different description objects, and do not limit the location, order, priority, number, content, etc. of the description objects, and the statement of the description object refers to the claims or the description of the embodiment context, and should not constitute unnecessary limitations due to the use of the prefix words. For example, if the description object is a "field", the ordinal words before the "field" in the "first field" and the "second field" do not limit the position or the order between the "fields", and the "first" and the "second" do not limit whether the "fields" modified by the "first" and the "second" are in the same message or not. For another example, describing an object as "level", ordinal words preceding "level" in "first level" and "second level" do not limit priority between "levels". As another example, the number of descriptive objects is not limited by ordinal words, and may be one or more, taking "first device" as an example, where the number of "devices" may be one or more. Furthermore, objects modified by different prefix words may be the same or different, e.g., the description object is "a device", then "a first device" and "a second device" may be the same device or different devices, and the types may be the same or different; for another example, the description object is "information", and the "first information" and the "second information" may be the same information or different information, and the contents thereof may be the same or different.

In some embodiments, "comprising a", "containing a", "for indicating a", "carrying a", may be interpreted as carrying a directly, or as indicating a indirectly.

In some embodiments, terms such as "time/frequency", "time-frequency domain", and the like refer to the time domain and/or the frequency domain.

In some embodiments, the terms "responsive to … …", "responsive to determination … …", "in the case of … …", "at … …", "when … …", "if … …", "if … …", and the like may be interchanged.

In some embodiments, terms "greater than", "greater than or equal to", "not less than", "more than or equal to", "not less than", "above" and the like may be interchanged, and terms "less than", "less than or equal to", "not greater than", "less than or equal to", "not more than", "below", "lower than or equal to", "no higher than", "below" and the like may be interchanged.

In some embodiments, an apparatus or the like may be interpreted as an entity, or may be interpreted as a virtual, and the names thereof are not limited to the names described in the embodiments, "apparatus," "device," "circuit," "network element," "node," "function," "unit," "section," "system," "network," "chip system," "entity," "body," and the like may be replaced with each other.

In some embodiments, a "network" may be interpreted as an apparatus (e.g., access network device, core network device, etc.) contained in a network.

In some embodiments, "access network device (access network device, AN device)", "radio access network device (radio access network device, RAN DEVICE)", "Base Station (BS)", "radio base station (radio base station)", "fixed station (fixed station)", "node(s)", "access point (access point)", "transmit point (transmission point, TP)", "Receive Point (RP)", "transmit and/or receive point (transmit/receive point), the terms TRP), panel, antenna panel (ANTENNA PANEL), antenna array (ANTENNA ARRAY), cell (cell), macro cell (macro cell), small cell (SMALL CELL), femto cell (femto cell), pico cell, sector (sector), cell group (cell group), serving cell, carrier, component carrier (component carrier), bandwidth part (BWP) and the like may be replaced with each other.

In some embodiments, terms such as "terminal" (terminal) "," terminal device (TERMINAL DEVICE) "," User Equipment (UE) "," user terminal "(MS)", "Mobile Station (MS)", mobile Terminal (MT) ", subscriber station (subscriber station), mobile unit (mobile unit), subscriber unit (subscriber unit), wireless unit (wireless unit), remote unit (remote unit), mobile device (mobile device), wireless device (WIRELESS DEVICE), wireless communication device (wireless communication device), remote device (remote device), mobile subscriber station (mobile subscriber station), access terminal (ACCESS TERMINAL), mobile terminal (mobile terminal), wireless terminal (WIRELESS TERMINAL), remote terminal (remote terminal), handheld device (handset), user agent (user agent), mobile client (mobile client), and the like may be used interchangeably.

In some embodiments, the access network device, core network device, or network device may be replaced with a terminal. For example, the embodiments of the present disclosure may also be applied to a configuration in which an access network device, a core network device, or communication between a network device and a terminal is replaced with communication between a plurality of terminals (for example, device-to-device (D2D), vehicle-to-everything (V2X), or the like). In this case, the terminal may have all or part of the functions of the access network device. In addition, terms such as "uplink", "downlink", and the like may be replaced with terms corresponding to communication between terminals (e.g., "side)". For example, uplink channels, downlink channels, etc. may be replaced with side-uplink channels, uplink, downlink, etc. may be replaced with side-downlink channels.

In some embodiments, the terminal may be replaced with an access network device, a core network device, or a network device. In this case, the access network device, the core network device, or the network device may have all or part of the functions of the terminal.

In some embodiments, the acquisition of data, information, etc. may comply with laws and regulations of the country of locale.

In some embodiments, data, information, etc. may be obtained after user consent is obtained.

Furthermore, each element, each row, or each column in the tables of the embodiments of the present disclosure may be implemented as a separate embodiment, and any combination of elements, any rows, or any columns may also be implemented as a separate embodiment.

Although operations are depicted in the drawings in a particular order, in this disclosure, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order, or that all illustrated operations be performed, to achieve desirable results. In certain circumstances, multitasking and parallel processing may be advantageous. It is furthermore advantageous to send a plurality of messages via the same message.

Fig. 1 is a schematic architecture diagram of a communication system shown in accordance with an embodiment of the present disclosure. As shown in fig. 1, the communication system 100 may include a terminal 101, and a network device 102.

In some embodiments, the terminal 101 includes at least one of, for example, a mobile phone (mobile phone), a wearable device, an internet of things device, a communication enabled car, a smart car, a tablet (Pad), a wireless transceiver enabled computer, a Virtual Reality (VR) terminal device, an augmented reality (augmented reality, AR) terminal device, a wireless terminal device in industrial control (industrial control), a wireless terminal device in unmanned-driving (self-driving), a wireless terminal device in teleoperation (remote medical surgery), a wireless terminal device in smart grid (SMART GRID), a wireless terminal device in transportation security (transportation safety), a wireless terminal device in smart city (SMART CITY), a wireless terminal device in smart home (smart home), but is not limited thereto.

In some embodiments, the network device 102 may include at least one of an access network device and a core network device.

Alternatively, the access network device is, for example, a node or a device for accessing the terminal to the wireless network, and the access network device may include at least one of an evolved NodeB (eNB) in a 5G communication system, a next generation evolved NodeB (next generation eNB, ng-eNB), a next generation NodeB (next generation NodeB, gNB), a NodeB (node B, NB), a Home NodeB (HNB), a home NodeB (home evolved nodeB, heNB), a wireless backhaul device, a radio network controller (radio network controller, RNC), a base station controller (base station controller, BSC), a base transceiver station (base transceiver station, BTS), a baseband unit (BBU), a mobile switching center, a base station in a 6G communication system, an Open base station (Open RAN), a Cloud base station (Cloud RAN), a base station in other communication system, and an access node in a Wi-Fi system, but is not limited thereto.

In some embodiments, network device 102 is a base station. Optionally, the base station is, for example, a macro base station, a micro base station (also called a small station), a relay station, an access Point, a 5G base station or future base station, a satellite, a transmission Point (TRANSMITTING AND RECEIVING Point, TRP), a transmission Point (TRANSMITTING POINT, TP), a mobile switching center, or other devices that assume the functions of a base station in a communication system, etc., which embodiments of the disclosure are not limited in detail. For convenience of description, in all embodiments of the present disclosure, an apparatus for providing a wireless communication function for a terminal device is collectively referred to as a network device or a base station.

In some embodiments, the network device 102 is a core network device. The core network device may be a device including a first network element, a second network element, etc., or may be a plurality of devices or device groups, each including all or part of the first network element, the second network element, etc. The network element may be virtual or physical. The core network comprises, for example, at least one of an evolved packet core (Evolved Packet Core, EPC), a 5G core network (5G Core Network,5GCN), a next generation core (Next Generation Core, NGC).

In some embodiments, the technical solutions of the present disclosure may be applied to an Open RAN architecture, where an access network device or an interface in an access network device according to the embodiments of the present disclosure may become an internal interface of the Open RAN, and flow and information interaction between these internal interfaces may be implemented by using software or a program.

In some embodiments, the access network device 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 the structure of the CU-DU may be used to split the protocol layers of the access network device, where functions of part of the protocol layers are centrally controlled by the CU, and functions of the rest of all the protocol layers are distributed in the DU, and the DU is centrally controlled by the CU, but is not limited thereto.

It may be understood that, the communication system described in the embodiments of the present disclosure is for more clearly describing the technical solutions of the embodiments of the present disclosure, and is not limited to the technical solutions provided in the embodiments of the present disclosure, and those skilled in the art can know that, with the evolution of the system architecture and the appearance of new service scenarios, the technical solutions provided in the embodiments of the present disclosure are applicable to similar technical problems.

The embodiments of the present disclosure described below may be applied to the communication system 100 shown in fig. 1, or a part of the main body, but are not limited thereto. The respective bodies shown in fig. 1 are examples, and the communication system may include all or part of the bodies in fig. 1, or may include other bodies than fig. 1, and the number and form of the respective bodies may be arbitrary, and the respective bodies may be physical or virtual, and the connection relationship between the respective bodies is examples, and the respective bodies may not be connected or may be connected, and the connection may be arbitrary, direct connection or indirect connection, or wired connection or wireless connection.

Embodiments of the present disclosure may be applied to long term evolution (Long Term Evolution, LTE), LTE-Advanced (LTE-a), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, fourth generation mobile communication system (4th generation mobile communication system,4G)), fifth generation mobile communication system (5th generation mobile communication system,5G), 5G New air interface (New Radio, NR), future Radio access (Future Radio Access, FRA), new Radio access technology (New-Radio Access Technology, RAT), new Radio (New Radio, NR), new Radio access (New Radio access, NX), future generation Radio access (Future generation Radio access, FX), global System for Mobile communications (GSM (registered trademark)), CDMA2000, ultra mobile broadband (Ultra Mobile Broadband, UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, ultra-WideBand (UWB), bluetooth (registered trademark)), land public mobile network (Public Land Mobile Network, PLMN) network, device-to-Device (D2D) system, machine-to-machine (Machine to Machine, M2M) system, internet of things (Internet of Things, ioT) system, vehicle-to-eventing (V2X), system utilizing other communication methods, next generation system extended based on them, and the like. In addition, a plurality of system combinations (e.g., LTE or a combination of LTE-a and 5G, etc.) may be applied.

In some embodiments, for NTN networks, the problem of downlink coverage is worse than for TN networks due to the higher satellite-to-ground altitude, and an enhancement of downlink coverage needs to be studied. Random access Msg2/MsgB/Msg4 as one of the downlink messages, there is also coverage problem in some scenarios. Therefore, it is necessary to study how to improve the downlink coverage of these messages to improve the performance of random access.

In some embodiments, to improve the downlink coverage of Msg2/Msg4/MsgB, the downlink coverage performance may be improved by means of retransmission of Msg2/Msg 4/MsgB. In order for the network to be able to determine the number of repetitions of Msg2/Msg4/MsgB, the UE is required to report assistance information to assist the network in determining the repetition.

In some embodiments, the auxiliary information may be one or more of the following:

Downlink signal quality, such as channel quality indication (CQI: channel Quality Indicator) or downlink reference point reference signal received Power (RSRP: REFERENCE SIGNAL RECEIVED Power);

the number of recommended repetition times;

whether the UE supports Msg2/Msg4/MsgB repetition.

In some embodiments, NR support configures different Physical Random Access Channel (PRACH) ACCESS CHANNEL) resources for different combinations of features (Feature combination). Feature combination supports the following combinations of features:

Msg3 repetition；

Msg1 repetition；

RedCap (Reduced capability), which is a 5G technology defined by the third generation partnership project (3 GPP: 3rd Generation Partnership Project) standardization organization, also known as lightweight 5G;

Small data SMALL DATA;

slice NSAG.

In some embodiments, in a random access procedure, after one random access attempt (i.e. random access channel attempt/RACH attempt) fails, the terminal needs to make another random access attempt again until the maximum number of random access attempts is reached. A handover between contention-based random access (CBRA: contention Based Random Access) and non-contention-based random access (CFRA: contention Free Random Access), or a 2-STEP RA to 4 STEP RA handover, or a replacement Msg1 repetition number may occur when the terminal makes different random access attempts.

In some embodiments, for the RACH procedure of Msg2/MsgB/Msg4 repetition, whether each RACH repetition reselects a random access resource has not been discussed yet, and accordingly, the present disclosure provides a communication method, a terminal, a network device, a communication system, and a storage medium to determine whether each random access attempt reselects a RACH resource for a scenario supporting Msg2/MsgB/Msg4 repetition.

Fig. 2 is an interactive schematic diagram of a communication method shown in accordance with an embodiment of the present disclosure. As shown in fig. 2, an embodiment of the present disclosure relates to a communication method, the method including:

In step S201, the terminal 101 determines to perform a first operation for a first RACH attempt in a random access procedure.

In some embodiments, the first operation corresponding to the first RACH attempt includes the terminal transmitting first information to the network device and/or updating the first information. The name of the first operation is not limited, and is, for example, a specific operation, an operation of transmitting information, an operation of updating information, or the like. Updating the first information may refer to updating the content of the first information, such as default content, initial content, etc., to obtain the first information corresponding to the first RACH attempt.

In some embodiments, the first information is used to assist the network device in determining the number of retransmissions of the second information. For example, the first information corresponding to the first RACH attempt is used to assist the network device in determining the number of retransmissions of the second information during the first RACH attempt, where the second information is information sent by the network device to the terminal during the first RACH attempt.

In some embodiments, the name of the first information is not limited, and is, for example, auxiliary information.

In some embodiments, the name of the second information is not limited. Optionally, the second information is any one of Msg 2, msg 4, msg B transmitted based on PDCCH or PDSCH.

In some embodiments, prior to step S201, the terminal 101 may determine whether to perform the first operation for the first RACH attempt.

Optionally, before the terminal 101 determines whether to perform the first operation for the first RACH attempt, it includes: whether to execute the first operation is determined for each access mode. Accordingly, an embodiment in which the terminal 101 determines whether to perform the first operation for the first RACH attempt may be: and determining whether to execute the first operation for the first RACH attempt according to the access mode corresponding to the first RACH attempt.

In some embodiments, the access manner of the RACH attempt includes, but is not limited to, CBRA, CFRA, 2-STEP RA, 4-STEP RA. Alternatively, the correspondence between each access mode and whether to execute the first operation may be indicated to the terminal through the network device. Alternatively, the correspondence between each access manner and whether to perform the first operation may be stored in the terminal in advance. Optionally, the corresponding relationship between each access mode and whether to execute the first operation is a default relationship.

It should be explained that 4-STEP RA relates to Msg 1, msg 2, msg 3, msg 4.Msg 1 is the message sent by the terminal to the network device in the first step. Msg 2 is the message sent by the network device to the terminal in the second step. Msg 3 is the message sent by the terminal to the network device in the third step. Msg 4 is the message sent by the network device to the terminal in the fourth step.

2-STEP RA involves Msg A, msg B. Msg a is the message sent by the terminal to the network device in the first step. Msg B is the message sent by the network device to the terminal in the second step.

It should be noted that in some embodiments, a random access procedure includes a random access initialization phase and at least one RACH attempt. Alternatively, the terminal 101 determines whether to perform the first operation for the first RACH attempt in the random access initialization phase. Optionally, the terminal 101 determines whether to perform the first operation for the first RACH attempt before initiating the first RACH attempt.

In some embodiments, determining whether to perform the first operation for the first RACH attempt comprises: for a first RACH attempt, it is determined whether to update the parameter value in the first information. For example, whether to update a default parameter item and a default parameter value in the first information is determined, so as to obtain the first information corresponding to the current RACH attempt.

In some embodiments, determining whether to perform the first operation for the first RACH attempt comprises:

For a first RACH attempt, it is determined whether to transmit first information.

In step S202, the terminal 101 determines first information corresponding to the first RACH attempt.

In some embodiments, the first information corresponding to the first RACH attempt includes a parameter value of at least one of the following:

a first parameter item, configured to indicate downlink signal quality;

a second parameter item for indicating the number of retransmissions recommended by the terminal 101;

A third parameter item for indicating whether the terminal 101 supports a function of retransmitting the second information by the network device 102.

The quality of the downlink signal can be confirmed through CQI and/or RSRPR.

In some embodiments, if the terminal 101 determines to perform the first operation for the first RACH attempt in the random access initialization phase, the terminal 101 determines the parameter items in the first information corresponding to the first RACH attempt and the parameter values of the respective parameter items in the random access initialization phase.

In some embodiments, if the terminal 101 determines that the first operation is performed for the first RACH attempt before initiating the first RACH attempt, the terminal 101 determines the parameter items in the first information corresponding to the first RACH attempt, and the parameter values of the respective parameter items, before initiating the first RACH attempt.

In step S203, the terminal 101 initiates a first RACH attempt, and selects a random access resource to transmit a random access preamble to the network device 102 according to the determination result of performing the first operation for the first RACH attempt.

In some embodiments, the network device 102 receives a random access preamble.

In some embodiments, the random access resources include at least one of time domain resources, frequency domain resources, code domain resources. The random access preamble is a code domain resource.

In some embodiments, the first information comprising different parameter values corresponds to different random access resources. That is, updating the content of the first information means updating the random access resource.

Alternatively, the embodiment in which the terminal 101 initiates a first RACH attempt and selects a random access resource to transmit a random access preamble to the network device 102 according to a determination result of performing a first operation for the first RACH attempt, includes: and determining corresponding random access resources according to the content of the first information corresponding to the first RACH attempt, and transmitting random access preambles in the random access resources according to time domain information and/or frequency domain information in the random access resources.

In some embodiments, if the first RACH attempt is made in a 4-STEP RA, then the random access preamble may also be referred to as Msg 1. In some embodiments, the first information is sent to the network device carried in Msg 1.

In some embodiments, if the first RACH attempt is made in the access manner of 2-STEP RA, the random access preamble and the first information may be transmitted to the network device via Msg a.

In step S204, the network device 102 determines, according to the first information corresponding to the first RACH attempt, the number of retransmissions of the second information in the process of the first RACH attempt, and responds to the terminal 101.

The network device 102 responding to the terminal 101 may include transmitting one or more times the second information to the terminal 101.

In some embodiments, step S203 may be replaced with the terminal 101 initiating a first RACH attempt, selecting a random access resource to transmit a random access preamble to the network device 102 according to the determination that the first operation is not performed for the first RACH attempt. Accordingly, step S204 may be replaced with the network device 102 responding to the terminal 101. The network device 102 responding to the terminal 101 may comprise sending the second information to the terminal 101 once, i.e. the second information is not retransmitted.

If the first RACH attempt fails, the second RACH attempt and the third RACH attempt are performed according to steps S205 to S208 described below until the random access is successful or until the number of RACH attempts reaches an upper limit. That is, the non-first RACH attempt in steps S205 to S208 described below may refer to any RACH attempt other than the first RACH attempt.

In step S205, the terminal 101 determines to perform the first operation for the non-first RACH attempt.

In some embodiments, the first operation corresponding to the non-first RACH attempt includes the terminal sending first information to the network device and/or updating the first information. The name of the first operation is not limited, and is, for example, a specific operation, an operation of transmitting information, an operation of updating information, or the like. Updating the first information may mean that the first information corresponding to the last RACH attempt or the content of the last used first information is updated to obtain the first information corresponding to the current RACH attempt.

In some embodiments, the first information is used to assist the network device in determining the number of retransmissions of the second information. For example, the first information corresponding to the non-first RACH attempt is used to assist the network device in determining the number of retransmissions of the second information during the non-first RACH attempt, where the second information is information sent by the network device to the terminal during the non-first RACH attempt.

In some embodiments, prior to step S205, the terminal 101 may determine whether to perform the first operation for a non-first RACH attempt.

Optionally, before the terminal 101 determines whether to perform the first operation for the non-first RACH attempt, it includes: whether to execute the first operation is determined for each access mode. Accordingly, an embodiment in which the terminal 101 determines whether to perform the first operation for the non-first RACH attempt may be: and determining whether to execute the first operation for the non-first RACH attempt according to the access mode corresponding to the non-first RACH attempt.

It should be noted that in some embodiments, a random access procedure includes a random access initialization phase and at least one RACH attempt. Alternatively, the terminal 101 determines whether to perform the first operation for the non-first RACH attempt in the random access initialization phase. Optionally, the terminal 101 determines whether to perform the first operation for the non-first RACH attempt before initiating the non-first RACH attempt.

In some embodiments, the terminal determines whether to perform the first operation for a non-first RACH attempt if the first condition is satisfied. Wherein the first condition comprises at least one of:

switching an access mode of RACH attempt from CFRA to CBRA, namely, the access mode of the last RACH attempt is CFRA, and the access mode of the current RACH attempt is CBRA;

The access mode of RACH attempt is switched from 2-STEP RA to 4-STEP RA, namely the access mode of the last RACH attempt is 2-STEP RA, and the access mode of the current RACH attempt is 4-STEP RA;

the number of RACH attempts reaches a first specified number;

The retransmission times of the message Msg 1 are changed;

the number of retransmissions recommended by the terminal in the first information transmitted last time is smaller than the second designated number.

In some embodiments, determining whether to perform the first operation for a non-first RACH attempt comprises: for non-first RACH attempts, it is determined whether to update the parameter values in the first information. For example, it is determined whether to update the parameter item and the parameter value in the first information corresponding to the last RACH attempt, so as to obtain the first information corresponding to the current RACH attempt. For example, it is determined whether to update the parameter item and the parameter value in the first information used last time, so as to obtain the first information corresponding to the RACH attempt.

In some embodiments, determining whether to perform the first operation for a non-first RACH attempt comprises:

for non-first RACH attempts, it is determined whether to transmit the first information.

In step S206, the terminal 101 determines first information corresponding to a non-first RACH attempt.

In some embodiments, the first information corresponding to the non-first RACH attempt includes a parameter value of at least one of the following:

a first parameter item, configured to indicate downlink signal quality;

The quality of the downlink signal can be confirmed through CQI and/or RSRPR.

In some embodiments, if the terminal 101 determines to perform the first operation for the non-first RACH attempt in the random access initialization phase, the terminal 101 determines the parameter items in the first information corresponding to the non-first RACH attempt and the parameter values of the respective parameter items in the random access initialization phase.

In some embodiments, if the terminal 101 determines to perform the first operation for the non-first RACH attempt before initiating the non-first RACH attempt, the terminal 101 determines the parameter items in the first information corresponding to the non-first RACH attempt, and the parameter values of the respective parameter items, before initiating the non-first RACH attempt.

In some embodiments, if it is determined that the number of retransmissions recommended by the terminal in the first information corresponding to the non-first RACH attempt is updated, the number of retransmissions recommended by the terminal in the updated first information may be greater than the number of retransmissions recommended by the terminal in the first information transmitted last time, and/or the number of retransmissions recommended by the terminal in the updated first information may be greater than the number of retransmissions of the second information in the process of the last RACH attempt.

In some embodiments, before updating the number of retransmissions recommended by the terminal in the first information corresponding to the non-first RACH attempt, the method includes: the terminal 101 receives the third information transmitted by the network device 102, and determines a candidate retransmission number sequence based on the third information. The terminal 101 determines a minimum number of candidate retransmissions greater than the number of retransmissions recommended by the terminal in the first information transmitted last time from the sequence of candidate retransmissions. Accordingly, an embodiment in which the terminal 101 updates the number of retransmissions recommended by the terminal in the first information corresponding to the non-first RACH attempt includes: and updating the number of retransmission times recommended by the terminal in the first information corresponding to the non-first RACH attempt according to the minimum number of retransmission times candidate, wherein after updating, the number of retransmission times recommended by the terminal in the first information corresponding to the non-first RACH attempt is the minimum number of retransmission times candidate.

In some embodiments, the third information is SIB 1, SIB 19, or an RRC reconfiguration message.

In some embodiments, before updating the number of retransmissions recommended by the terminal in the first information corresponding to the non-first RACH attempt, the method includes: the terminal 101 receives fourth information transmitted by the network device, and determines the number of retransmissions of the second information in the process of the last RACH attempt other than the first RACH attempt according to the fourth information. Wherein the fourth message is SIB 1, SIB 19, or an RRC reconfiguration message. Accordingly, an embodiment in which the terminal 101 updates the number of retransmissions recommended by the terminal in the first information corresponding to the non-first RACH attempt includes: updating the number of retransmission times recommended by the terminal in the first information corresponding to the non-first RACH attempt according to the value larger than the number of retransmission times of the second information in the process of the last RACH attempt, wherein after updating, the number of retransmission times recommended by the terminal in the first information corresponding to the non-first RACH attempt is a value larger than the number of retransmission times of the second information in the process of the last RACH attempt.

In step S207, the terminal 101 initiates a non-first RACH attempt, and selects a random access resource to transmit a random access preamble to the network device 102 according to the determination result of performing the first operation for the non-first RACH attempt.

In some embodiments, the network device 102 receives a random access preamble.

In some embodiments, the first information comprising different parameter values corresponds to different random access resources.

Alternatively, the embodiment in which the terminal 101 initiates a non-first RACH attempt and selects a random access resource to transmit a random access preamble to the network device 102 according to the determination result of performing the first operation for the non-first RACH attempt, includes: and determining corresponding random access resources according to the content of the first information corresponding to the non-first RACH attempt, and transmitting random access preambles in the random access resources according to time domain information and/or frequency domain information in the random access resources.

In some embodiments, the random access preamble may also be referred to as Msg 1 if the access manner other than the first RACH attempt is 4-STEP RA. In some embodiments, the first information is sent to the network device carried in Msg 1.

In some embodiments, if the access manner other than the first RACH attempt is 2-STEP RA, then the random access preamble and the first information may be sent to the network device via Msg a.

In step S208, the network device 102 determines the number of retransmissions of the second information in the process of the non-first RACH attempt according to the first information corresponding to the non-first RACH attempt, and responds to the terminal 101.

In some embodiments, step S207 may be replaced with the terminal 101 initiating a non-first RACH attempt, selecting a random access resource to transmit a random access preamble to the network device 102 according to the result of the determination that the first operation is not performed for the non-first RACH attempt. Accordingly, step S208 may be replaced with the network device 102 responding to the terminal 101. The network device 102 responding to the terminal 101 may comprise sending the second information to the terminal 101 once, i.e. the second information is not retransmitted.

In some embodiments, the names of information and the like are not limited to the names described in the embodiments, and terms such as "information", "message", "signal", "signaling", "report", "configuration", "instruction", "command", "channel", "parameter", "field", "symbol", "codebook", "code word", "code point", "codepoint", "bit", "data", "program", "chip", and the like may be replaced with each other.

In some embodiments, terms "downlink", "physical downlink", and the like may be interchanged.

In some embodiments, the terms "random access attempt", "random access channel attempt", "RACH attempt", etc. may be interchanged.

In some embodiments, terms such as "physical downlink shared channel (physical downlink SHARED CHANNEL, PDSCH)", "DL data", "physical downlink control channel PDCCH", and the like may be interchanged.

In some embodiments, "acquire," "obtain," "receive," "transmit," "bi-directional transmit," "send and/or receive" may be used interchangeably and may be interpreted as receiving from other principals, acquiring from protocols, acquiring from higher layers, processing itself, autonomous implementation, etc.

In some embodiments, terms such as "send," "transmit," "report," "send," "transmit," "bi-directional," "send and/or receive," and the like may be used interchangeably.

In some embodiments, terms such as "specific (certains)", "predetermined (preseted)", "preset", "set", "indicated (indicated)", "certain", "arbitrary", "first", and the like may be replaced with each other, and "specific a", "predetermined a", "preset a", "set a", "indicated a", "certain a", "arbitrary a", "first a" may be interpreted as a predetermined in a protocol or the like, may be interpreted as a obtained by setting, configuring, or indicating, or the like, may be interpreted as specific a, certain a, arbitrary a, or first a, or the like, but are not limited thereto.

In some embodiments, the determination or judgment may be performed by a value expressed in 1 bit, such as 0 or 1, or may be performed by a true or false value expressed in true (true) or false (false), such as boolean value (boolean), or may be performed by a comparison of values, such as, but not limited to, a comparison with a predetermined value.

The communication method according to the embodiment of the present disclosure may include at least one of step S201 to step S208. For example, step S203 may be implemented as a separate embodiment, step S207 may be implemented as a separate embodiment, step S203 and step S204 may be implemented as separate embodiments, and step S207 and step S208 may be implemented as separate embodiments, but are not limited thereto.

In some embodiments, step S201 and step S202 may be performed in exchange for or simultaneously, and step S205 and step S206 may be performed in exchange for or simultaneously.

In some embodiments, steps S201, S202, S204-S208 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

In some embodiments, steps S201-S206, S208 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

In some embodiments, reference may be made to alternative implementations described before or after the description corresponding to fig. 2.

Fig. 3 is a flow diagram illustrating a communication method according to an embodiment of the present disclosure. As shown in fig. 3, an embodiment of the present disclosure relates to a communication method, which is performed by a terminal side, and includes:

step S301 determines whether to perform a first operation for a first RACH attempt in a random access procedure.

Alternative implementations of step S301 may refer to alternative implementations of step S201 in fig. 2, and other relevant parts in the embodiment related to fig. 2, which are not described herein.

Step S302, determining first information corresponding to the first RACH attempt.

Alternative implementations of step S302 may refer to alternative implementations of step S202 in fig. 2, and other relevant parts in the embodiment related to fig. 2, which are not described herein.

Step S303, a first RACH attempt is initiated, and a random access preamble is selected for transmission of a random access resource according to a determination result of performing a first operation for the first RACH attempt.

Alternative implementations of step S303 may refer to alternative implementations of step S203 in fig. 2, and other relevant parts in the embodiment related to fig. 2, which are not described herein.

In some embodiments, the terminal 101 transmits the random access preamble to the network device 102, but is not limited thereto, and may transmit the random access preamble to other bodies.

Step S304, a first RACH attempt is initiated, and a random access preamble is selected for transmission of a random access resource according to a determination result that the first operation is not performed for the first RACH attempt.

Alternative implementations of step S304 may refer to alternative implementations of step S204 in fig. 2, and other relevant parts in the embodiment related to fig. 2, which are not described herein.

The communication method according to the embodiment of the present disclosure may include at least one of step S301 to step S304. For example, step S303 may be implemented as an independent embodiment, and steps S302 and S303 may be implemented as independent embodiments, but are not limited thereto.

In some embodiments, step S301 and step S302 may be performed in exchange order or simultaneously.

In some embodiments, steps S301, S302, and S304 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

Fig. 4 is a flow diagram illustrating a communication method according to an embodiment of the present disclosure. As shown in fig. 4, an embodiment of the present disclosure relates to a communication method, which is performed by a terminal side, and includes:

Step S401, it is determined whether to perform the first operation for the non-first RACH attempt in the random access procedure.

Alternative implementations of step S401 may refer to alternative implementations of step S205 in fig. 2, and other relevant parts in the embodiment related to fig. 2, which are not described herein.

Step S402, determining first information corresponding to a non-first RACH attempt.

Alternative implementations of step S402 may refer to alternative implementations of step S206 in fig. 2, and other relevant parts in the embodiment related to fig. 2, which are not described herein.

Step S403, a non-first RACH attempt is initiated, and a random access preamble is selected for transmission of a random access resource according to the determination result of performing the first operation for the non-first RACH attempt.

Alternative implementations of step S403 may refer to alternative implementations of step S207 in fig. 2, and other relevant parts in the embodiment related to fig. 2, which are not described herein.

Step S404, a non-first RACH attempt is initiated, and a random access resource is selected to transmit a random access preamble according to a determination result that the first operation is not performed for the non-first RACH attempt.

Alternative implementations of step S404 may refer to alternative implementations of step S208 in fig. 2, and other relevant parts in the embodiment related to fig. 2, which are not described herein.

The communication method according to the embodiment of the present disclosure may include at least one of step S401 to step S404. For example, step S403 may be implemented as an independent embodiment, and steps S402 and S403 may be implemented as independent embodiments, but are not limited thereto.

In some embodiments, step S401 and step S402 may be performed in exchange order or simultaneously.

In some embodiments, steps S401, S402, and S404 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

In the embodiment of the present disclosure, step S403 may be combined with step S303 of fig. 3, step S404 may be combined with step S304 of fig. 3, step S403 may be combined with step S304 of fig. 3, and step S404 may be combined with step S303 of fig. 3, but is not limited thereto.

Fig. 5 is a flow diagram illustrating a communication method according to an embodiment of the present disclosure. As shown in fig. 5, an embodiment of the present disclosure relates to a communication method, which is performed by a terminal side, and includes:

step S501, it is determined whether to perform the first operation for the nth RACH attempt in the random access procedure, N being a natural number greater than 0.

Alternative implementations of step S501 may refer to step S201 of fig. 2, step S205, step S301 of fig. 3, alternative implementations of step S401 of fig. 4, and other relevant parts in the embodiments related to fig. 2, 3, and 4, which are not described herein.

Step S502, determining first information corresponding to the nth RACH attempt.

Alternative implementations of step S502 may refer to step S202 of fig. 2, step S206, step S302 of fig. 3, alternative implementations of step S402 of fig. 4, and other relevant parts in the embodiments related to fig. 2, 3, and 4, which are not described herein.

Step S503, initiate an nth RACH attempt, and select a random access resource to transmit a random access preamble according to a determination result of performing the first operation for the nth RACH attempt.

Alternative implementations of step S503 may refer to step S203 of fig. 2, step S207, step S303 of fig. 3, alternative implementations of step S403 of fig. 4, and other relevant parts in the embodiments related to fig. 2, 3, and 4, which are not described herein.

Step S504, initiating an Nth RACH attempt, and selecting a random access resource to transmit a random access preamble according to a determination result that the first operation is not performed for the Nth RACH attempt.

Alternative implementations of step S504 may refer to step S204 of fig. 2, step S208, step S304 of fig. 3, alternative implementations of step S404 of fig. 4, and other relevant parts in the embodiments related to fig. 2, 3, and 4, which are not described herein.

The communication method according to the embodiment of the present disclosure may include at least one of step S501 to step S504. For example, step S503 may be implemented as an independent embodiment, and steps S502 and S503 may be implemented as independent embodiments, but are not limited thereto.

In some embodiments, step S501 and step S502 may be performed in exchange order or simultaneously.

In some embodiments, step S501, step S502, and step S504 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

Fig. 6 is a flow diagram illustrating a communication method according to an embodiment of the present disclosure. As shown in fig. 6, an embodiment of the present disclosure relates to a communication method, which is performed by a network device side, and the method includes:

step S601, receiving a random access preamble transmitted for an nth RACH attempt in a random access procedure, where N is a natural number greater than 0.

Alternative implementations of step S601 may refer to alternative implementations of step S203 and step S207 in fig. 2, and other relevant parts in the embodiment related to fig. 2, which are not described herein.

In some embodiments, the network device 102 receives the random access preamble transmitted by the terminal 101 for the nth RACH attempt in the random access procedure, but is not limited thereto, and may also receive the random access preamble transmitted by other bodies for the nth RACH attempt in the random access procedure.

Step S602, determining the number of retransmissions of the second information according to the first information in the random access preamble.

Alternative implementations of step S602 may refer to alternative implementations of step S204 and step S208 in fig. 2, and other relevant parts in the embodiment related to fig. 2, which are not described herein.

Step S603, response is performed according to the number of retransmissions.

Alternative implementations of step S603 may refer to alternative implementations of step S204 and step S208 in fig. 2, and other relevant parts in the embodiment related to fig. 2, which are not described herein.

In some embodiments, network device 102 responds to terminal 101, but is not limited thereto, and may also respond to other principals.

The communication method according to the embodiment of the present disclosure may include at least one of step S601 to step S603. For example, step S603 may be implemented as an independent embodiment, and steps S602 and S603 may be implemented as independent embodiments, but are not limited thereto.

In some embodiments, step S601 and step S602 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

Fig. 7 is an interactive schematic diagram of a communication method shown according to an embodiment of the disclosure. As shown in fig. 7, an embodiment of the present disclosure relates to a communication method, the method including:

In step S701, the terminal determines whether to perform a first operation for an nth random access channel RACH attempt in a random access procedure, where the first operation includes sending first information to a network device, where the first information is used to assist the network device in determining a retransmission number of second information, where the second information is information sent by the network device to the terminal in the nth RACH attempt procedure, and N is a natural number greater than 0.

Alternative implementations of step S701 may refer to step S201 of fig. 2, step S205, step S301 of fig. 3, step S401 of fig. 4, alternative implementations of step S501 of fig. 5, and other relevant parts in the embodiments related to fig. 2, 3, 4, and 5, which are not described herein.

Step S702, the terminal initiates the Nth RACH attempt, and selects random access resources to send random access lead codes to the network equipment according to the determined result.

Alternative implementations of step S702 may refer to step S203, step S207, step S303, step S304, step S403, step S404, step S503, step S504 of fig. 2, step S207, step S303, step S304 of fig. 3, and other relevant parts in the embodiments related to fig. 2, fig. 3, fig. 4, and fig. 5, which are not described herein.

In step S703, the network device responds to the random access preamble transmitted by the terminal for the nth RACH attempt in the random access procedure.

Alternative implementations of step S703 may refer to alternative implementations of step S204 and step S208 in fig. 2 and step S603 in fig. 6, and other relevant parts in the embodiments related to fig. 2 and fig. 6, which are not described herein.

The communication method according to the embodiment of the present disclosure may include at least one of step S701 to step S703. For example, step S702 may be implemented as an independent embodiment, and steps S701 and S702 may be implemented as independent embodiments, but are not limited thereto.

In some embodiments, step S701 and step S703 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

In some embodiments, step S701 and step S702 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

In some embodiments, step S702 and step S703 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

In some embodiments, the method may include method steps described in the embodiments of the terminal side, the network device side, the communication system side, and so on, which are not described herein.

Fig. 8 is a flow diagram illustrating a communication method according to an embodiment of the present disclosure. As shown in fig. 8, an embodiment of the present disclosure relates to a communication method, the method including:

In step S801, the terminal determines whether to perform a first operation for an nth random access channel RACH attempt in a random access procedure, where the first operation includes sending first information to a network device, where the first information is used to assist the network device in determining a retransmission number of second information, where the second information is information sent by the network device to the terminal in the nth RACH attempt procedure, and N is a natural number greater than 0.

Alternative implementations of step S801 may refer to step S201 of fig. 2, step S205, step S301 of fig. 3, step S401 of fig. 4, alternative implementations of step S501 of fig. 5, and other relevant parts in the embodiments related to fig. 2, 3, 4, and 5, which are not described herein.

Step S802, the terminal initiates the Nth RACH attempt, and selects random access resources to send random access lead codes to the network equipment according to the determined result.

Alternative implementations of step S802 may refer to step S203, step S207, step S303, step S304, step S403, step S404, step S503, step S504 of fig. 2, step S207, step S303, step S304 of fig. 3, and other relevant parts in the embodiments related to fig. 2, fig. 3, fig. 4, and fig. 5, which are not described herein.

The communication method according to the embodiment of the present disclosure may include at least one of step S801 and step S802. For example, step S801 may be implemented as an independent embodiment, and step S802 may be implemented as an independent embodiment, but is not limited thereto.

In some embodiments, step S802 is optional, and may be omitted or replaced in different embodiments.

In some embodiments, step S801 is optional, and may be omitted or replaced in different embodiments.

Fig. 9 is a flow diagram of a communication method shown in accordance with an embodiment of the present disclosure. As shown in fig. 9, an embodiment of the present disclosure relates to a communication method, the method including:

Step S901, a network device responds to a random access preamble sent by a terminal for an nth RACH attempt in a random access procedure, where the random access preamble is sent by the terminal according to a random access resource selected by the terminal according to a determination result of whether to perform a first operation for the nth RACH attempt; the first operation includes that the terminal sends first information to the network device, the first information is used for assisting the network device to determine retransmission times of second information, the second information is information sent to the terminal by the network device in the process of the Nth RACH attempt, and N is a natural number greater than 0.

Alternative implementations of step S901 may refer to alternative implementations of step S204 and step S208 in fig. 2 and step S603 in fig. 6, and other relevant parts in the embodiments related to fig. 2 and fig. 6, which are not described herein.

In some embodiments, the terminal determines whether to report Msg2/MsgB/Msg4 repetition auxiliary information and/or whether to update Msg2/MsgB/Msg4 repetition auxiliary information for each RACH attempt in the random access procedure, and selects a corresponding random access resource to transmit a Preamble based on the result of the determination. Wherein the Msg2/MsgB/Msg4 repetition side information corresponds to the first information in the foregoing embodiment.

In some embodiments, the Msg2/MsgB/Msg4 repetition comprises: msg2/Msg4/MsgB PDCCH repetition and/or Msg2/Msg4/MsgB PDSCH repetition.

In some embodiments, the Msg2/MsgB/Msg4 repetition side information may include one or more of the following:

downlink signal quality, such as CQI or downlink reference point RSRP;

the number of recommended repetition times;

Whether the UE supports Msg2/Msg4/MsgB repetition;

In some embodiments, the terminal reports the auxiliary information through Msg1/MsgA, and the terminal distinguishes the content of the auxiliary information through different RACH resources.

In some embodiments, the terminal determines whether to report Msg2/MsgB/Msg4 repetition assistance information in the random access initialization phase.

In some embodiments, the terminal determines whether to report Msg2/MsgB/Msg4 repetition auxiliary information and the content of the reported auxiliary information in the random access initialization phase.

In some embodiments, it may be possible to distinguish between CBRA resources, CFRA resources, 2-STEP RA resources, 4-STEP RA resources, etc. to determine whether to report Msg2/MsgB/Msg4 repetition auxiliary information and the content of the reported auxiliary information separately.

In some embodiments, the first random access attempt of the UE random access procedure uses the determination result of whether to report Msg2/MsgB/Msg4 repetition auxiliary information and/or the content of auxiliary information reported when reporting, which are determined in the random access initialization phase, to determine RACH resources.

In some embodiments, each subsequent random access attempt of the UE random access procedure uses the determination result of whether to report Msg2/MsgB/Msg4 repetition auxiliary information and/or the content of auxiliary information reported when reporting, which are determined in the random access initialization phase, to determine RACH resources.

In some embodiments, for each subsequent random access attempt of the UE random access procedure, it is determined whether to report Msg2/MsgB/Msg4 repetition auxiliary information and/or determine the content of auxiliary information reported during reporting, and a corresponding random access resource is selected to transmit a Preamble based on the result of the determination.

In some embodiments, updating the assistance information content means replacing RACH resources. Wherein the RACH resources correspond to the random access resources in the foregoing embodiments.

In some embodiments, if it is determined to report the Msg2/MsgB/Msg4 repetition auxiliary information, the UE transmits the Preamble using a random access resource corresponding to the content according to the content of the reported auxiliary information.

In some embodiments, in a subsequent random access attempt of the UE random access procedure, when a CFRA-to-CBRA handover occurs, or a 2-STEP RA is switched to a 4-STEP RA, or the number of random access attempts reaches a certain number, it is determined whether to report Msg2/MsgB/Msg4 repetition auxiliary information and/or determine the auxiliary information content reported at the time of reporting, and based on the determined result, a corresponding random access resource is selected to transmit a Preamble. In some embodiments, the above approach applies to the first handoff of a UE from CFRA to CBRA.

In some embodiments, when the UE switches from CFRA to CBRA, each subsequent CBRA random access attempt reports the same content as the assistance information of the first CBRA attempt.

In some embodiments, after the assistance information is re-determined, subsequent random access attempts are each sent in accordance with the re-determined assistance information. Wherein the re-determining of the content of the auxiliary information may be understood as updating the content of the last used auxiliary information.

In some embodiments, in a subsequent random access attempt of the UE random access procedure, the proposed repetition number may be promoted, and a corresponding random access resource is selected to transmit a Preamble according to the promoted repetition number. Wherein the recommended repetition number corresponds to the retransmission number recommended by the terminal in the foregoing embodiment.

In some embodiments, the UE may select one repetition number greater than the last used repetition number from the configured repetition numbers. For example, the configured repetition times are sorted from low to high, and the next repetition times larger than the last repetition times are selected. The UE may try X times for the current repetition number and increase the repetition number if unsuccessful until the configured repetition number maximum is reached.

In some embodiments, the network configures the candidate repetition number through a system message such as SIB1/SIB19 or an RRC reconfiguration message.

In some embodiments, the network configures the value of X via a system message such as SIB1/SIB19 or an RRC reconfiguration message.

In some embodiments, in a subsequent random access attempt of the UE random access procedure, when the number of Msg1 repetition changes occurs, whether to report Msg2/MsgB/Msg4 repetition auxiliary information and/or determine the content of the auxiliary information during reporting are determined again, and based on the determined result, a corresponding random access resource is selected to send a Preamble.

In the embodiments of the present disclosure, some or all of the steps and alternative implementations thereof may be arbitrarily combined with some or all of the steps in other embodiments, and may also be arbitrarily combined with alternative implementations of other embodiments.

The embodiments of the present disclosure also provide an apparatus for implementing any of the above methods, for example, an apparatus is provided, where the apparatus includes a unit or a module for implementing each step performed by the terminal in any of the above methods. For another example, another apparatus is also proposed, which includes a unit or module configured to implement steps performed by a network device (e.g., an access network device, a core network function node, a core network device, etc.) in any of the above methods.

It should be understood that the division of each unit or module in the above apparatus is merely a division of a logic function, and may be fully or partially integrated into one physical entity or may be physically separated when actually implemented. Furthermore, units or modules in the apparatus may be implemented in the form of processor-invoked software: the device comprises, for example, a processor, the processor being connected to a memory, the memory having instructions stored therein, the processor invoking the instructions stored in the memory to perform any of the methods or to perform the functions of the units or modules of the device, wherein the processor is, for example, a general purpose processor, such as a central processing unit (Central Processing Unit, CPU) or microprocessor, and the memory is internal to the device or external to the device. Or a unit or module in the apparatus may be implemented in the form of a hardware circuit, and the functions of some or all of the unit or module may be implemented by the design of the hardware circuit, where the hardware circuit may be understood as one or more processors; for example, in one implementation, the hardware circuit is an application-specific integrated circuit (ASIC), and the functions of some or all of the units or modules are implemented by designing a logic relationship of elements in the circuit; for another example, in another implementation, the hardware circuit may be implemented by a programmable logic device (programmable logic device, PLD), for example, a field programmable gate array (Field Programmable GATE ARRAY, FPGA), which may include a large number of logic gates, and the connection relationship between the logic gates is configured by a configuration file, so as to implement the functions of some or all of the units or modules. All units or modules of the above device may be realized in the form of invoking software by a processor, or in the form of hardware circuits, or in part in the form of invoking software by a processor, and in the rest in the form of hardware circuits.

In the disclosed embodiments, the processor is a circuit with signal processing capabilities, and in one implementation, the processor may be a circuit with instruction reading and running capabilities, such as a central processing unit (Central Processing Unit, CPU), a microprocessor, a graphics processor (graphics processing unit, GPU) (which may be understood as a microprocessor), or a digital signal processor (DIGITAL SIGNAL processor, DSP), etc.; in another implementation, the processor may implement a function through a logic relationship of hardware circuits that are fixed or reconfigurable, such as a hardware circuit implemented as an application-specific integrated circuit (ASIC) or a programmable logic device (programmable logic device, PLD), such as an FPGA. In the reconfigurable hardware circuit, the processor loads the configuration document, and the process of implementing the configuration of the hardware circuit may be understood as a process of loading instructions by the processor to implement the functions of some or all of the above units or modules. Furthermore, a hardware circuit designed for artificial intelligence may be also be considered as an ASIC, such as a neural network Processing Unit (Neural Network Processing Unit, NPU), tensor Processing Unit (Tensor Processing Unit, TPU), deep learning Processing Unit (DEEP LEARNING Processing Unit, DPU), and the like.

Fig. 10 is a schematic structural diagram of a terminal according to an embodiment of the present disclosure. As shown in fig. 10, the terminal 101 may include: at least one of the first transceiver module 1001, the first processing module 1002, and the like. In some embodiments, the first processing module 1002 is configured to determine whether to perform a first operation for an nth random access channel RACH attempt in a random access procedure, where the first operation includes sending first information to a network device, where the first information is used to assist the network device in determining a number of retransmissions of second information, where the second information is information sent by the network device to the terminal in the nth RACH attempt procedure, and N is a natural number greater than 0. The first transceiver module 1001 is configured to initiate the nth RACH attempt, select a random access resource according to a determination result, and send a random access preamble to the network device.

Optionally, the first transceiver module 1001 is configured to perform at least one of the communication steps (e.g., step S203, step S207, but not limited thereto) of transmission and/or reception performed by the terminal 101 in any of the above methods, which is not described herein. Optionally, the first processing module 1002 is configured to perform at least one of the other steps (e.g., step S201, step S202, step S204, step S205, step S206, step S208, but not limited thereto) performed by the terminal 101 in any of the above methods, which is not described herein.

Optionally, the second information includes at least one of the following transmitted based on a physical downlink control channel PDCCH and/or a physical downlink shared channel PDSCH:

message Msg 2;

Message Msg 4;

message Msg B.

Optionally, the first information includes a parameter value of at least one of the following:

a first parameter item, configured to indicate downlink signal quality;

Optionally, the first information is carried in a message Msg 1 or a message Msg a and sent to the network device.

Optionally, the access manner of the RACH attempt includes at least one of the following:

contention-based random access CBRA;

Non-contention random access, CFRA;

STEP 2, randomly accessing 2-STEP RA;

4-STEP RA。

Optionally, the first processing module 1002 is configured to, before the determining whether to perform the first operation for the nth RACH attempt in the random access procedure, determine whether to perform the first operation for each access mode separately; and determining the determination result according to the access mode corresponding to the Nth RACH attempt.

Optionally, the first information comprising different parameter values corresponds to different random access resources; the first transceiver module 1001 is configured to determine a corresponding random access resource according to the parameter value in the first information, and send a random access preamble.

Optionally, the first processing module 1002 is configured to determine, in a random access initialization phase, whether to perform the first operation for a first RACH attempt.

Optionally, the first processing module 1002 is configured to determine, in a random access initialization phase, whether to perform the first operation for a non-first RACH attempt.

Optionally, the first processing module 1002 is configured to determine to perform the first operation, and determine a parameter value in the first information in a random access initialization phase.

Optionally, the first processing module 1002 is configured to, for a non-first RACH attempt, determine whether to perform the first operation for the non-first RACH attempt before initiating the non-first RACH attempt.

Optionally, the first operation further includes updating the first information; the first processing module 1002 is configured to determine, for the non-first RACH attempt, whether to update a parameter value in the first information.

Optionally, the first processing module 1002 is configured to, before determining whether to perform the first operation for the non-first RACH attempt, determine that a first condition is met, where the first condition includes at least one of:

the access mode of RACH attempt is switched from CFRA to CBRA;

the RACH attempted access mode is switched from 2-STEP RA to 4-STEP RA;

the number of RACH attempts reaches a first specified number;

the number of retransmissions of the message Msg 1 is changed.

Optionally, the first processing module 1002 is configured to update the number of retransmission times recommended by the terminal in the first information corresponding to the non-first RACH attempt, where the number of retransmission times recommended by the terminal in the updated first information is greater than the number of retransmission times recommended by the terminal in the first information sent last time, and/or the number of retransmission times recommended by the terminal in the updated first information is greater than the number of retransmission times of the second information in the process of the last RACH attempt other than the first RACH attempt.

Optionally, the first transceiver module 1001 is configured to receive third information sent by the network device, where the third information is used to configure a candidate retransmission number sequence, before the number of retransmissions proposed by the terminal in the first information corresponding to the updated non-first RACH attempt;

The first processing module 1002 is configured to determine, from the sequence of candidate retransmission times, a minimum candidate retransmission time greater than a retransmission time recommended by the terminal in the first information sent last time; and updating the retransmission times recommended by the terminal in the first information corresponding to the non-first RACH attempt according to the minimum candidate retransmission times.

Optionally, the third information is any one of the following:

system message block SIB 1;

SIB 19；

A radio resource control, RRC, reconfiguration message.

Optionally, the first transceiver module 1001 is configured to receive fourth information sent by the network device before the number of retransmissions proposed by the terminal in the first information corresponding to the updated non-first RACH attempt;

The first processing module 1002 is configured to determine, according to the fourth information, a number of retransmissions of the second information during a previous RACH attempt of the non-first RACH attempt; and updating the recommended retransmission times of the terminal in the first information corresponding to the non-first RACH attempt according to a value larger than the retransmission times of the second information.

Optionally, the fourth information is any one of the following:

SIB 1；

SIB 19；

RRC reconfiguration message.

Optionally, the first processing module 1002 is configured to determine, before updating the number of retransmissions recommended by the terminal in the first information corresponding to the non-first RACH attempt, that the number of retransmissions recommended by the terminal in the first information sent last time is smaller than a second designated number.

In some embodiments, the first transceiver module 1001 may include a transmitting module and/or a receiving module, which may be separate or integrated. Alternatively, the "first transceiver module" may be interchanged with the "first transceiver".

In some embodiments, the first processing module 1002 may be one module, or may include multiple sub-modules. Optionally, the above sub-modules perform all or part of the steps required to be performed by the first processing module 1002, respectively. Alternatively, the "first processing module" may be interchanged with the "first processor".

Fig. 11 is a schematic structural diagram of a network device according to an embodiment of the present disclosure. As shown in fig. 11, the network device 102 may include: at least one of the second transceiver module 1101, the second processing module 1102, and the like. In some embodiments, the second processing module 1102 is configured to respond to a random access preamble sent by a terminal for an nth RACH attempt in a random access procedure, where the random access preamble is sent by the terminal according to a random access resource selected by the terminal according to a determination result of whether to perform the first operation for the nth RACH attempt; the first operation includes that the terminal sends first information to the network device, the first information is used for assisting the network device to determine retransmission times of second information, the second information is information sent to the terminal by the network device in the process of the Nth RACH attempt, and N is a natural number greater than 0.

Optionally, the second transceiver module 1101 is configured to perform at least one of the communication steps (e.g., step S203, step S207, but not limited thereto) of the sending and/or receiving performed by the network device 102 in any of the above methods, which is not described herein. Optionally, the second processing module 1102 is configured to perform at least one of the other steps (e.g. step S201, step S202, step S204, step S205, step S206, step S208, but not limited thereto) performed by the network device 102 in any of the above methods, which is not described herein.

In some embodiments, the second transceiver module 1101 may include a transmitting module and/or a receiving module, which may be separate or integrated. Alternatively, the "second transceiver module" may be interchanged with the "second transceiver".

In some embodiments, the second processing module 1102 may be a module or may include a plurality of sub-modules. Optionally, the above sub-modules perform all or part of the steps required to be performed by the second processing module 1102, respectively. Alternatively, the "second processing module" may be interchanged with the "second processor".

Fig. 12 is a schematic structural diagram of a communication device 8100 according to an embodiment of the present disclosure. The communication device 8100 may be a network device (e.g., an access network device, a core network device, etc.), a terminal (e.g., a user device, etc.), a chip system, a processor, etc. that supports the network device to implement any of the above methods, or a chip, a chip system, a processor, etc. that supports the terminal to implement any of the above methods. The communication device 8100 may be used to implement the method described in the above method embodiments, and reference may be made in particular to the description of the above method embodiments.

As shown in fig. 12, communication device 8100 includes one or more third processors 8101. The third processor 8101 may be a general-purpose processor or a special-purpose processor, etc., and may be, for example, a baseband processor or a central processing unit. The baseband processor may be used to process communication protocols and communication data, and the central processor may be used to control communication devices (e.g., base stations, baseband chips, terminal devices, terminal device chips, DUs or CUs, etc.), execute programs, and process data for the programs. Optionally, the communication device 8100 is configured to perform any of the above methods. Optionally, one or more third processors 8101 are configured to invoke instructions to cause communication device 8100 to perform any of the above methods.

In some embodiments, communication device 8100 also includes one or more third transceivers 8102. When the communication device 8100 includes one or more third transceivers 8102, the third transceivers 8102 perform at least one of the communication steps (e.g., but not limited to, step S203, step S207) such as transmission and/or reception in the above-described method, and the third processors 8101 perform at least one of the other steps (e.g., but not limited to, step S201, step S202, step S204, step S205, step S206, step S208). In alternative embodiments, the transceiver may include a receiver and/or a transmitter, which may be separate or integrated. Alternatively, terms such as transceiver, transceiver unit, transceiver circuit, interface, etc. may be replaced with each other, terms such as transmitter, transmitter unit, transmitter circuit, etc. may be replaced with each other, and terms such as receiver, receiving unit, receiver, receiving circuit, etc. may be replaced with each other.

In some embodiments, communication device 8100 also includes one or more third memory 8103 for storing data. Optionally, all or part of the third memory 8103 may also be external to the communication device 8100. In alternative embodiments, communication device 8100 may include one or more first interface circuits 8104. Optionally, the first interface circuit 8104 is connected to the third memory 8103, and the first interface circuit 8104 is operable to receive data from the third memory 8103 or other device and is operable to transmit data to the third processor 8101 or other device. For example, the first interface circuit 8104 may read data stored in the third memory 8103 and transmit the data to the third processor 8101.

The communication device 8100 in the above embodiment description may be a network device or a terminal, but the scope of the communication device 8100 described in the present disclosure is not limited thereto, and the structure of the communication device 8100 may not be limited by fig. 12. The communication device may be a stand-alone device or may be part of a larger device. For example, the communication device may be: 1) A stand-alone integrated circuit IC, or chip, or a system-on-a-chip or subsystem; (2) A set of one or more ICs, optionally including storage means for storing data, programs; (3) an ASIC, such as a Modem (Modem); (4) modules that may be embedded within other devices; (5) A receiver, a terminal device, an intelligent terminal device, a cellular phone, a wireless device, a handset, a mobile unit, a vehicle-mounted device, a network device, a cloud device, an artificial intelligent device, and the like; (6) others, and so on.

Fig. 13 is a schematic structural diagram of a chip 8200 according to an embodiment of the present disclosure. For the case where the communication device 8100 may be a chip or a chip system, reference may be made to a schematic structural diagram of the chip 8200 shown in fig. 13, but is not limited thereto.

The chip 8200 includes one or more fourth processors 8201. The chip 8200 is used to perform any of the above methods.

In some embodiments, the chip 8200 further comprises one or more second interface circuits 8202. Alternatively, the terms interface circuit, interface, transceiver pin, etc. may be interchanged. In some embodiments, the chip 8200 further comprises one or more fourth memories 8203 for storing data. Alternatively, all or part of the fourth memory 8203 may be external to the chip 8200. Optionally, a second interface circuit 8202 is connected to the fourth memory 8203, the second interface circuit 8202 may be configured to receive data from the fourth memory 8203 or another device, and the second interface circuit 8202 may be configured to send data to the fourth memory 8203 or another device. For example, the second interface circuit 8202 may read data stored in the fourth memory 8203 and transmit the data to the fourth processor 8201.

In some embodiments, the second interface circuit 8202 performs at least one of the communication steps (e.g., step S203, step S207, but not limited thereto) of sending and/or receiving in the above-described method. The second interface circuit 8202 performs the communication step of transmitting and/or receiving in the above method, for example, by: the second interface circuit 8202 performs data interaction between the fourth processor 8201, the chip 8200, the fourth memory 8203, or the transceiving device. In some embodiments, fourth processor 8201 performs at least one of the other steps (e.g., step S201, step S202, step S204, step S205, step S206, step S208, but is not limited thereto).

The modules and/or devices described in the embodiments of the virtual device, the physical device, the chip, etc. may be arbitrarily combined or separated according to circumstances. Alternatively, some or all of the steps may be performed cooperatively by a plurality of modules and/or devices, without limitation.

The present disclosure also proposes a storage medium having stored thereon instructions that, when executed on a communication device 8100, cause the communication device 8100 to perform any of the above methods. Optionally, the storage medium is an electronic storage medium. Alternatively, the storage medium described above is a computer-readable storage medium, but is not limited thereto, and it may be a storage medium readable by other devices. Alternatively, the above-described storage medium may be a non-transitory (non-transitory) storage medium, but is not limited thereto, and it may also be a transitory storage medium.

The present disclosure also proposes a program product which, when executed by a communication device 8100, causes the communication device 8100 to perform any of the above methods. Optionally, the above-described program product is a computer program product.

The present disclosure also proposes a computer program which, when run on a computer, causes the computer to perform any of the above methods.

Claims

1. A method of communication, performed by a terminal, the method comprising:

Determining whether to perform a first operation for an nth random access channel RACH attempt in a random access procedure, the first operation including transmitting first information to a network device, the first information being used to assist the network device in determining a number of retransmissions of second information, the second information being information transmitted to the terminal by the network device in the nth random access channel RACH attempt procedure, wherein N is a natural number greater than 0;

Initiating the Nth random access channel RACH attempt, selecting random access resources to send a random access preamble to the network equipment according to a determination result;

the determining whether to perform the first operation for an nth random access channel, RACH, attempt in the random access procedure includes:

Determining the determination result according to an access mode corresponding to the Nth random access channel RACH attempt; the random access channel RACH attempts access mode includes at least one of the following:

contention-based random access CBRA;

Non-contention random access, CFRA;

STEP 2, randomly accessing 2-STEP RA;

4-STEP RA。

2. The method of claim 1, wherein the second information comprises at least one of the following based on physical downlink control channel, PDCCH, and/or physical downlink shared channel, PDSCH, transmission:

message Msg 2;

Message Msg 4;

message Msg B.

3. The method of claim 1, wherein the step of determining the position of the substrate comprises,

The first information includes parameter values of at least one of the following:

a first parameter item, configured to indicate downlink signal quality;

4. The method of claim 1, wherein the step of determining the position of the substrate comprises,

The first information is carried in a message Msg 1 or a message Msg a to be sent to the network device.

5. The method of claim 1, comprising, prior to said determining whether to perform the first operation for an nth random access channel, RACH, attempt in a random access procedure:

and determining whether to execute the first operation or not respectively for each access mode.

6. The method according to any one of claims 1 to 5, wherein,

The first information comprising different parameter values corresponds to different random access resources;

The initiating the nth random access channel RACH attempt, selecting a random access resource according to a determination result, and transmitting a random access preamble to the network device, including:

and determining corresponding random access resources according to the parameter values in the first information, and sending a random access preamble.

7. The method of claim 6, wherein the determining whether to perform the first operation for an nth random access channel, RACH, attempt in the random access procedure comprises:

it is determined in a random access initialization phase whether to perform the first operation for a first RACH attempt.

8. The method of claim 7, wherein the determining whether to perform the first operation for an nth random access channel, RACH, attempt in the random access procedure comprises:

It is determined in a random access initialization phase whether to perform the first operation for a non-first RACH attempt.

9. The method according to claim 7 or 8, characterized in that the method further comprises:

And determining to execute the first operation, and determining parameter values in the first information in a random access initialization stage.

10. The method of claim 7, wherein the determining whether to perform the first operation for an nth random access channel, RACH, attempt in the random access procedure comprises:

For a non-first RACH attempt, before initiating the non-first RACH attempt, it is determined whether to perform the first operation for the non-first RACH attempt.

11. The method of claim 10, wherein the step of determining the position of the first electrode is performed,

The first operation further includes updating the first information;

the determining whether to perform the first operation for the non-first RACH attempt includes:

For the non-first RACH attempt, a determination is made as to whether to update the parameter values in the first information.

12. The method of claim 10 or 11, comprising, prior to determining whether to perform the first operation for the non-first RACH attempt:

the access mode of RACH attempt is switched from CFRA to CBRA;

the RACH attempted access mode is switched from 2-STEP RA to 4-STEP RA;

the number of RACH attempts reaches a first specified number;

the number of retransmissions of the message Msg 1 is changed.

13. The method of claim 11, wherein the determining whether to update the parameter values in the first information for the non-first RACH attempt comprises:

Updating the number of retransmission times of the terminal in the first information corresponding to the non-first RACH attempt, wherein the number of retransmission times of the terminal in the updated first information is greater than the number of retransmission times of the terminal in the first information transmitted last time, and/or the number of retransmission times of the terminal in the updated first information is greater than the number of retransmission times of the second information in the process of the last RACH attempt of the non-first RACH attempt.

14. The method of claim 13, comprising, prior to said updating the number of retransmissions proposed by the terminal in the first information corresponding to the non-first RACH attempt:

receiving third information sent by the network equipment, wherein the third information is used for configuring a candidate retransmission time sequence;

determining a minimum candidate retransmission number greater than the retransmission number recommended by the terminal in the first information transmitted last time from the candidate retransmission number sequence;

The updating the retransmission times recommended by the terminal in the first information corresponding to the non-first RACH attempt includes:

And updating the retransmission times recommended by the terminal in the first information corresponding to the non-first RACH attempt according to the minimum candidate retransmission times.

15. The method of claim 14, wherein the third information is any one of:

system message block SIB 1;

SIB 19；

A radio resource control, RRC, reconfiguration message.

16. The method of claim 13, comprising, prior to said updating the number of retransmissions proposed by the terminal in the first information corresponding to the non-first RACH attempt:

Receiving fourth information sent by the network equipment;

Determining the retransmission times of the second information in the process of the last RACH attempt of the non-first RACH attempt according to the fourth information;

And updating the recommended retransmission times of the terminal in the first information corresponding to the non-first RACH attempt according to a value larger than the retransmission times of the second information.

17. The method of claim 16, wherein the fourth information is any one of:

SIB 1；

SIB 19；

RRC reconfiguration message.

18. The method according to any of claims 13-17, characterized in that before updating the number of retransmissions recommended by the terminal in the first information corresponding to the non-first RACH attempt, it comprises:

And determining that the number of retransmission times suggested by the terminal in the first information transmitted last time is smaller than a second designated number.

19. A method of communication, performed by a network device, the method comprising:

Responding to a random access preamble sent by a terminal aiming at an Nth random access channel RACH attempt in a random access process, wherein the random access preamble is sent by the terminal according to a random access resource selected by a determination result of whether to execute a first operation aiming at the Nth random access channel RACH attempt, the determination result is determined by the terminal according to an access mode corresponding to the Nth random access channel RACH attempt, and the access mode of the random access channel RACH attempt comprises at least one of the following steps:

contention-based random access CBRA;

Non-contention random access, CFRA;

STEP 2, randomly accessing 2-STEP RA;

4-STEP RA；

The first operation includes that the terminal sends first information to the network device, the first information is used for assisting the network device to determine retransmission times of second information, the second information is information sent to the terminal by the network device in the process of the Nth random access channel RACH attempt, and N is a natural number greater than 0.

20. A terminal, comprising:

A first processing module, configured to determine whether to perform a first operation for an nth random access channel RACH attempt in a random access procedure, where the first operation includes sending first information to a network device, where the first information is used to assist the network device in determining a number of retransmissions of second information, where the second information is information sent by the network device to the terminal in the nth random access channel RACH attempt, and N is a natural number greater than 0;

a first transceiver module, configured to initiate the nth random access channel RACH attempt, select a random access resource according to a determination result, and send a random access preamble to the network device;

The first processing module is configured to determine the determination result according to an access mode corresponding to the nth random access channel RACH attempt; the random access channel RACH attempts access mode includes at least one of the following:

contention-based random access CBRA;

Non-contention random access, CFRA;

STEP 2, randomly accessing 2-STEP RA;

4-STEP RA。

21. a network device, comprising:

A second processing module, configured to respond to a random access preamble sent by a terminal for an nth random access channel RACH attempt in a random access procedure, where the random access preamble is sent by the terminal according to a random access resource selected by the terminal according to a determination result of whether to execute a first operation for the nth random access channel RACH attempt, where the determination result is determined by the terminal according to an access manner corresponding to the nth random access channel RACH attempt, and the access manner of the random access channel RACH attempt includes at least one of:

contention-based random access CBRA;

Non-contention random access, CFRA;

STEP 2, randomly accessing 2-STEP RA;

4-STEP RA；

22. A terminal, comprising:

One or more first processors;

A first memory coupled to the first processor, the first memory having stored thereon executable instructions that, when executed by the first processor, cause the terminal to perform the communication method of any of claims 1-18.

23. A network device, comprising:

One or more second processors;

A second memory coupled to the second processor, the second memory having stored thereon executable instructions that, when executed by the second processor, cause the network device to perform the communication method of claim 19.

24. A communication system comprising a terminal configured to implement the communication method of any of claims 1-18, and a network device configured to implement the communication method of claim 19.

25. A storage medium storing instructions that, when executed on a communication device, cause the communication device to perform the communication method of any one of claims 1-19.