WO2023070679A1 - 随机接入方法、装置、通信装置和计算机可读存储介质 - Google Patents

随机接入方法、装置、通信装置和计算机可读存储介质 Download PDF

Info

Publication number
WO2023070679A1
WO2023070679A1 PCT/CN2021/127997 CN2021127997W WO2023070679A1 WO 2023070679 A1 WO2023070679 A1 WO 2023070679A1 CN 2021127997 W CN2021127997 W CN 2021127997W WO 2023070679 A1 WO2023070679 A1 WO 2023070679A1
Authority
WO
WIPO (PCT)
Prior art keywords
terminal
random access
type
base station
rar
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2021/127997
Other languages
English (en)
French (fr)
Inventor
牟勤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing Xiaomi Mobile Software Co Ltd
Original Assignee
Beijing Xiaomi Mobile Software Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Beijing Xiaomi Mobile Software Co Ltd filed Critical Beijing Xiaomi Mobile Software Co Ltd
Priority to PCT/CN2021/127997 priority Critical patent/WO2023070679A1/zh
Priority to CN202180003475.4A priority patent/CN114175839B/zh
Priority to EP21962029.1A priority patent/EP4429386A4/en
Priority to CN202410295500.6A priority patent/CN118075912B/zh
Publication of WO2023070679A1 publication Critical patent/WO2023070679A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information
    • H04W74/006—Transmission of channel access control information in the downlink, i.e. towards the terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information
    • H04W74/004—Transmission of channel access control information in the uplink, i.e. towards network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H04W74/0841—Random access procedures, e.g. with 4-step access with collision treatment
    • H04W74/085—Random access procedures, e.g. with 4-step access with collision treatment collision avoidance

Definitions

  • the present disclosure relates to the technical field of communication, and specifically, to a random access method, a random access device, a communication device, and a computer-readable storage medium.
  • RedCap terminal a Reduced capability (Reduced capability) terminal
  • NR-lite NR-lite
  • This kind of terminal generally needs to meet low cost and low complexity. degree of enhanced coverage, power saving and other conditions.
  • the RedCap terminal can carry information indicating its own type when initiating random access, for example When initiating two-step random access, early indication can be performed through the physical uplink shared channel (Physical Uplink Shared Channel, PUSCH) in the random access message MsgA, which is used to indicate whether the terminal initiating random access is a RedCap terminal.
  • PUSCH Physical Uplink Shared Channel
  • the base station If the base station does not correctly demodulate the PUSCH in MsgA, it can send a fallback random access response fallback RAR (Random Access Response) to the terminal, which carries configuration information, so that the terminal sends a random access message Msg3 to the base station according to the configuration information , Msg3 is the third message in the four-step random access process, and the content carried in it is the same or similar to the PUSCH in MsgA. But in some scenarios, the base station cannot determine how to configure the terminal to send Msg3.
  • RAR Random Access Response
  • embodiments of the present disclosure propose a random access method, a random access device, a communication device, and a computer-readable storage medium, so as to solve technical problems in related technologies.
  • a random access method is proposed, which is applicable to the first type of terminal, and the first type of terminal is configured to carry the terminal type indication in the physical uplink shared channel PUSCH of the random access message MsgA information, the method includes: sending MsgA to the base station; receiving the random access response RAR sent by the base station; responding to the RAR being a fallback random access response fallback RAR, re-initiating random access or sending according to the instructions of the base station Msg3.
  • a random access method is proposed, which is applicable to a base station, and the method includes: receiving the MsgA sent by the first type terminal; sending a random access response RAR to the terminal, wherein the RAR is the fallback random access response fallback RAR; receive the random access re-initiated by the terminal or receive the Msg3 sent by the terminal.
  • a random access device which is suitable for a first type of terminal, and the first type of terminal is configured to carry a terminal type indication in the physical uplink shared channel PUSCH of the random access message MsgA Information
  • the apparatus includes one or more processors, the processors are configured to: send MsgA to the base station; receive the random access response RAR sent by the base station; respond to the RAR as a fallback random access response fallback RAR, re-initiate random access or send Msg3 according to the instructions of the base station.
  • a random access device which is suitable for a base station, and the device includes one or more processors, and the processors are configured to: receive MsgA sent by a first type terminal; Sending a random access response RAR to the terminal, where the RAR is a fallback random access response fallback RAR; receiving a random access re-initiated by the terminal or receiving Msg3 sent by the terminal.
  • a communication device including: a processor; a memory for storing a computer program; wherein, when the computer program is executed by the processor, the implementation of any of the above-mentioned embodiments A random access method suitable for a first type of terminal.
  • a communication device including: a processor; a memory for storing a computer program; wherein, when the computer program is executed by the processor, the implementation of any of the above-mentioned embodiments A random access method suitable for base stations.
  • a computer-readable storage medium for storing a computer program, and when the computer program is executed by a processor, it can realize the above-mentioned any embodiment applicable to the first Steps in a random access method for type terminals.
  • a computer-readable storage medium for storing a computer program.
  • the computer program is executed by a processor, the random Steps in the access method.
  • the RedCap terminal after the RedCap terminal sends MsgA to the base station, if it receives the RAR sent by the base station and determines that the received RAR is a fallback RAR, it can directly re-initiate random access in one embodiment, and in another In the embodiment, Msg3 may be sent according to the instruction of the base station.
  • the base station Since it is difficult for the base station to determine whether to configure the terminal to send Msg3 on the first Initial UL BWP or to send Msg3 on the second Initial UL BWP, the resources configured for the terminal to send Msg3 may not be appropriate. Therefore, the terminal directly re-initiates Random access can avoid communication problems caused by sending Msg3 on inappropriate resources, such as avoiding resource conflicts.
  • Fig. 1 is a schematic flowchart of a random access method according to an embodiment of the present disclosure.
  • Fig. 2 is a schematic flowchart of another random access method according to an embodiment of the present disclosure.
  • Fig. 3 is a schematic flow chart showing another random access method according to an embodiment of the present disclosure.
  • Fig. 4 is a schematic flowchart of a random access method according to an embodiment of the present disclosure.
  • Fig. 5 is a schematic flowchart of another random access method according to an embodiment of the present disclosure.
  • Fig. 6 is a schematic flowchart of another random access method according to an embodiment of the present disclosure.
  • Fig. 7 is a schematic block diagram of an apparatus for random access according to an embodiment of the present disclosure.
  • Fig. 8 is a schematic block diagram of an apparatus for random access according to an embodiment of the present disclosure.
  • first, second, third, etc. may use the terms first, second, third, etc. to describe various information, the information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of the embodiments of the present disclosure, first information may also be called second information, and similarly, second information may also be called first information. Depending on the context, the word “if” as used herein may be interpreted as “at” or "when” or "in response to a determination.”
  • the terms used herein are “greater than” or “less than”, “higher than” or “lower than” when representing a size relationship. But for those skilled in the art, it can be understood that the term “greater than” also covers the meaning of “greater than or equal to”, and “less than” also covers the meaning of “less than or equal to”; the term “higher than” covers the meaning of “higher than or equal to”. “The meaning of "below” also covers the meaning of "less than or equal to”.
  • Fig. 1 is a schematic flowchart of a random access method according to an embodiment of the present disclosure.
  • the random access method shown in this embodiment may be applicable to a first type of terminal, where the first type of terminal is configured to carry terminal type indication information in the physical uplink shared channel PUSCH of the random access message MsgA, and the first type Terminals can communicate with base stations, including but not limited to communication devices such as mobile phones, tablet computers, wearable devices, sensors, and Internet of Things devices.
  • the base stations include but are not limited to communication systems such as 4G base stations, 5G base stations, and 6G base stations base station.
  • the initiation of the random access method may include the following steps:
  • step S101 send a random access message MsgA to the base station
  • step S102 receiving a random access response RAR sent by the base station
  • step S103 in response to the RAR being a fallback random access response fallback RAR, re-initiate random access or send Msg3 according to the instruction of the base station.
  • the terminal may initiate random access to the base station to access the base station, for example, initiate two-step random access or initiate four-step random access.
  • the random access message MsgA is the first message Msg1. That is: the terminal first sends a random access message Msg1 to the terminal, which carries a Physical Random Access Channel (Physical Random Access Channel, PRACH) preamble;
  • PRACH Physical Random Access Channel
  • the base station After the base station detects the preamble, it sends a random access response RAR to the terminal, which can also be called the second message Msg2.
  • the RAR can carry the identification ID of the detected preamble, a timing advance related command, and a temporary C-RNTI (Cell-RadioNetworkTemporaryIdentifier, Cell Radio Network Temporary Identifier) may also be called TC-RNTI, and may also carry resource allocation information, and the resource allocation information is used to instruct the terminal to send the resource of the random access message Msg3;
  • C-RNTI Cell-RadioNetworkTemporaryIdentifier, Cell Radio Network Temporary Identifier
  • the terminal After receiving the RAR, the terminal can send the third message Msg3 to the base station.
  • Msg3 is mainly PUSCH, and the specific content carried in it is not fixed and depends on the actual scene;
  • the base station After receiving Msg3, the base station uses the contention resolution identification ID to send a contention resolution message to the terminal, which may be called the fourth message Msg4;
  • the terminal After receiving Msg4, the terminal obtains the contention resolution ID in it, and then sends an acknowledgment message to the base station on the Physical Uplink Control Channel (PUCCH), completing the four-step random access process.
  • PUCCH Physical Uplink Control Channel
  • the four-step access process requires at least two cycles of round-trip communication between the terminal and the base station, which will increase the delay of the access process to a certain extent, and also generate additional signaling overhead. Therefore, in some cases , these problems can be alleviated by two-step random access.
  • the terminal sends a random access message MsgA to the base station.
  • MsgA is composed of PRACH preamble and PUSCH, which is equivalent to Msg1 and Msg3 in the four-step random access process. It can be used in the four-step random access process
  • the PRACH occasion (PO) where Msg1 is transmitted can also be transmitted in an independent PO (for example, in a PO dedicated to two-step random access);
  • the base station After receiving MsgA, the base station sends a response message MsgB to the terminal, which includes a random access response and a contention resolution message, which is equivalent to Msg2 and Msg4 in the four-step random access process.
  • the interaction between the base station and the terminal in the access process can be reduced, which is beneficial to reduce the delay of the access process and save signaling overhead.
  • the terminal and the base station communicate in the unlicensed frequency band.
  • the random access process requires fewer interactions, which is beneficial to the number of Listen Before Talk (LBT) attempts in the unlicensed frequency band.
  • LBT Listen Before Talk
  • the base station detects the PRACH preamble in MsgA, but fails to decode the PUSCH in MsgA correctly, then it can send a fallback RAR to the terminal.
  • the fallback RAR contains at least resource allocation information, such as the uplink authorization UL grant, It is used to instruct the terminal to transmit Msg3 resources. After the terminal receives the fallback RAR, it can send Msg3 according to the indicated resources, which is equivalent to falling back to the four-step random access process;
  • Case 3 The base station detects the PRACH preamble in MsgA and correctly decodes the PUSCH in MsgA, and can return MsgB to the terminal, which can carry a successful random access response successRAR, and successRAR can carry the contention resolution identification ID, C-RNTI , timing advance command, etc., the terminal can determine that the two-step random access process has been successfully completed after receiving the MsgB.
  • the base station configures the Initial UL BWP of the first type of terminal as the first Initial UL BWP, and configures the Initial UL BWP of the second type of terminal as the second Initial UL BWP.
  • the first type of terminal includes a reduced-capability RedCap terminal
  • the second type of terminal includes a non-RedCap terminal, which may also be called a traditional terminal or a Non-RedCap terminal.
  • an early indication can be performed through the PUSCH in MsgA.
  • the indication method can be an explicit indication or an implicit indication. It is used to indicate the type of terminal that the terminal initiates random access, for example, whether it is a RedCap terminal.
  • the base station may Configure different Initial UL BWP (Bandwidth Part) for RedCap terminals and non-RedCap terminals, so that RedCap terminals and non-RedCap terminals can use different Initial UL BWPs to initiate random access respectively.
  • Initial UL BWP Bandwidth Part
  • the Initial UL BWP configured for RedCap terminals is called the first Initial UL BWP
  • the Initial UL BWP configured for non-RedCap terminals is called the second Initial UL BWP.
  • the first Initial UL BWP is different from the second Initial UL BWP .
  • the difference between the first Initial UL BWP and the second Initial UL BWP may be exemplarily one or more of the following situations:
  • the bandwidth width of the first Initial UL BWP and the second Initial UL BWP are different;
  • the start position and/or end position of the first Initial UL BWP and the second Initial UL BWP are different.
  • the first Initial UL BWP and the second Initial UL BWP may overlap, or the first Initial UL BWP and the second Initial UL BWP do not overlap at all, or the first Initial UL BWP is completely contained in In the second Initial UL BWP, or the second Initial UL BWP is completely included in the first Initial UL BWP.
  • the Initial UL BWP configured for the RedCap terminal is called the first Initial UL BWP, which is exclusively used by the RedCap terminal.
  • the Initial UL BWP configured for non-RedCap terminals is called the second Initial UL BWP, which can be configured for both RedCap terminals and non-RedCap terminals.
  • the base station does not correctly demodulate the PUSCH in MsgA, and cannot correctly obtain the early indication, so that the type of the terminal that initiates the random access cannot be determined, resulting in The base station cannot determine whether to configure the terminal to send Msg3 on the first Initial UL BWP or to send Msg3 on the second Initial UL BWP.
  • the RedCap terminal after the RedCap terminal sends the MsgA to the base station, if it receives the RAR sent by the base station and determines that the received RAR is a fallback RAR, in a possible embodiment, it can directly re-initiate random access. In another possible embodiment, Msg3 may be sent according to the instruction of the base station.
  • the base station Since it is difficult for the base station to determine whether to configure the terminal to send Msg3 on the first Initial UL BWP or to send Msg3 on the second Initial UL BWP, the resources configured for the terminal to send Msg3 may not be appropriate. Therefore, the terminal directly re-initiates Random access can avoid communication problems caused by sending Msg3 on inappropriate resources, such as avoiding resource conflicts.
  • the base station can also instruct the terminal as needed, instructing the terminal to send Msg3 when receiving the fallback RAR, for example, through the fallback RAR, or through system information or other downlink signaling in advance, or according to the communication standard to make sure. Accordingly, it is possible to flexibly control whether the terminal sends Msg3 when receiving the fallback RAR.
  • the re-initiating random access includes:
  • the random access re-initiated by the terminal may be a two-step random access or a four-step random access, which may be specifically set as required.
  • the re-initiating two-step random access includes:
  • the two-step random access is re-initiated on the physical random access channel PRACH resource dedicated to the two-step random access.
  • the re-initiating four-step random access includes:
  • the four-step random access is re-initiated on the PRACH resource dedicated to the first type of terminal.
  • Fig. 2 is a schematic flowchart of another random access method according to an embodiment of the present disclosure. As shown in Figure 2, before sending Msg3 according to the instruction of the base station, the method further includes:
  • step S201 it is determined whether to re-initiate random access when the fallback RAR is received according to the instruction of the base station.
  • the method also includes:
  • step S202 in response to determining not to re-initiate random access when the fallback RAR is received, send a random access message Msg3 to the base station according to the fallback RAR.
  • the base station can indicate to the terminal as needed, indicating whether the terminal will re-initiate random access after receiving the fallback RAR.
  • the indication of the base station can be realized through fallback RAR or broadcast information, such as through fallback RAR Instructions are made, or instructions are made in advance through broadcast information (such as system information).
  • the indication of the base station includes an explicit indication or an implicit indication, that is, the indication to the terminal may be indicated in an explicit manner, or may be indicated in an implicit manner.
  • the terminal may determine whether to re-initiate the random access according to the instruction of the base station, if it is determined not to re-initiate the random access, it may send Msg3 to the base station, and determine to re-initiate the random access In case of entry, re-initiate two-step random access or four-step random access. Accordingly, the base station can flexibly control whether the terminal sends Msg3 when receiving the fallback RAR.
  • Fig. 3 is a schematic flow chart showing another random access method according to an embodiment of the present disclosure.
  • the response to the RAR is a fallback random access response fallback RAR, and re-initiating random access includes:
  • step S301 in response to the RAR being a fallback random access response fallback RAR, determine whether a preset configuration is configured;
  • step S302 in response to determining that the terminal is configured with a preset configuration, re-initiate random access.
  • the method includes:
  • step S301 in response to the RAR being a fallback random access response fallback RAR, determine whether a preset configuration is configured;
  • step S303 in response to no preset configuration being configured, Msg3 is sent to the base station.
  • the method also includes:
  • step S301 in response to the RAR being a fallback random access response fallback RAR, determine whether a preset configuration is configured;
  • step S302 in response to determining that the terminal is configured with a preset configuration, re-initiate random access.
  • step S301 in response to the RAR being a fallback random access response fallback RAR, determine whether a preset configuration is configured;
  • step S303 in response to no preset configuration being configured, Msg3 is sent to the base station.
  • the base station can also configure a preset configuration for the terminal, so that when the terminal receives the fallback RAR, it does not send Msg3 based on the fallback RAR, but re-initiates random access.
  • the preset configuration may be configured by the base station to the terminal, determined by the terminal according to a communication protocol, or preset in the terminal.
  • the preset configuration includes at least one of the following:
  • the initial uplink bandwidth part Initial UL BWP configured by the first type terminal is different from the Initial UL BWP configured by the second type terminal;
  • the Initial UL BWP configured by the first type terminal shares PRACH resources with the Initial UL BWP configured by the second type terminal;
  • the configured Initial UL BWP of the second type terminal is greater than the maximum bandwidth supported by the first type terminal
  • the mechanism for the first type terminal to carry terminal type indication information in Msg3 is disabled (disabled);
  • the first type terminal transmits Msg3 based on an intra-slot frequency hopping (intra-slot frequency hopping) scheme, and the frequency hopping range in the intra-slot frequency hopping scheme is greater than the maximum bandwidth supported by the first type terminal.
  • intra-slot frequency hopping intra-slot frequency hopping
  • the first-type terminal determines that the Initial UL BWP configured by the first-type terminal is different from the Initial UL BWP configured by the second-type terminal, it will be difficult for the base station to accurately Determine whether to configure the terminal to send Msg3 on the first Initial UL BWP or send Msg3 on the second Initial UL BWP, which may cause the resources configured for the terminal to send Msg3 to be inappropriate, so it can be received in the case of fallback RAR , do not send Msg3 based on fallback RAR, but re-initiate random access to avoid communication problems caused by sending Msg3 on inappropriate resources, such as avoiding resource conflicts.
  • the first-type terminal determines that the Initial UL BWP configured by the first-type terminal shares PRACH resources with the Initial UL BWP configured by the second-type terminal, it is difficult for the base station to The BWP where the terminal initiates random access distinguishes between two terminal types, so it is difficult to accurately determine whether to configure the terminal to send Msg3 on the first Initial UL BWP or to send Msg3 on the second Initial UL BWP, which may cause the The resources for sending Msg3 are not appropriate, so when receiving fallback RAR, instead of sending Msg3 based on fallback RAR, random access can be re-initiated to avoid communication problems caused by sending Msg3 on inappropriate resources, such as avoiding Resource conflict.
  • the base station may not be able to distinguish the two types of terminals based on the BWP where the random access is initiated. Two terminal types.
  • the first type terminal determines that the Initial UL BWP configured by the second type terminal is greater than the maximum bandwidth (maximum UE BW) supported by the first type terminal, even if the base station passes the fallback RAR Configure the first type of terminal to send Msg3 on the second Initial UL BWP. Since the second Initial UL BWP is greater than the maximum bandwidth supported by the first type of terminal, the first type of terminal cannot send Msg3 well on the second Initial UL BWP. Therefore Instead of sending Msg3 based on fallback RAR, random access can be re-initiated to avoid problems in sending Msg3 on unsupported bandwidth.
  • the terminal when the first type terminal determines that the mechanism for carrying the terminal type indication information in Msg3 is invalid, for example, the first type terminal is a RedCap terminal, and the terminal type indication information is early indication, the terminal cannot carry the terminal type indication information in the Msg3 sent according to the fallback RAR, but can carry the terminal type indication information in the subsequent random access process initiated, so the random access process can be re-initiated, and carry the terminal The type indication information is sent to the base station.
  • the first type terminal determines that the first type terminal transmits Msg3 based on an intra-slot frequency hopping scheme, and the frequency hopping range in the intra-slot frequency hopping scheme is greater than that supported by the first type terminal
  • the base station configures the first type of terminal to transmit Msg3 based on the intra-slot frequency hopping scheme through fallback RAR, since the frequency hopping range in the configured intra-slot frequency hopping scheme is greater than that supported by the first type of terminal
  • the first type of terminal cannot well support frequency hopping transmission of this scheme, so Msg3 can not be sent based on fallback RAR, but random access can be re-initiated to avoid problems in sending Msg3 based on an unsupported frequency hopping scheme.
  • Fig. 4 is a schematic flowchart of a random access method according to an embodiment of the present disclosure.
  • the random access method shown in this embodiment can be applied to a base station, and the base station can communicate with a terminal, for example, a first type of terminal.
  • the first type of terminal includes, for example, a reduced capability RedCap terminal, and the terminal includes but is not limited to
  • the base stations include but are not limited to base stations in communication systems such as 4G base stations, 5G base stations, and 6G base stations.
  • the random access method includes:
  • step S401 receive the MsgA sent by the terminal of the first type
  • step S402 sending a random access response RAR to the terminal, wherein the RAR is a fallback random access response fallback RAR;
  • step S403 the random access re-initiated by the terminal is received or the Msg3 sent by the terminal is received.
  • the base station sends a fallback RAR to the terminal in response to not correctly demodulating the PUSCH in the MsgA; in another possible implementation manner, the base station responds to Failed to demodulate the corresponding Preamble in MsgA. Details will be given later.
  • the terminal in response to the terminal being configured with a preset configuration and receiving the fallback RAR, the terminal re-initiates random access. In another implementation manner, in response to the terminal not being configured with the preset configuration and receiving the fallback RAR, the terminal sends Msg3 to the base station.
  • the step 403 may be: receiving the random access re-initiated by the terminal; the random access is the random access re-initiated by the terminal when the terminal is configured with a preset configuration and receives fallback RAR .
  • the step 403 may be: receiving the Msg3 sent by the terminal; wherein the Msg3 is the Msg3 sent by the terminal when the terminal is not configured with a preset configuration and a fallback RAR is received.
  • the terminal may initiate random access to the base station to access the base station, for example, initiate two-step random access or initiate four-step random access.
  • the terminal first sends a random access message Msg1 to the terminal, which carries a physical random access channel (Physical Random Access Channel, PRACH) preamble;
  • a physical random access channel Physical Random Access Channel, PRACH
  • the base station After the base station detects the preamble, it sends a random access response RAR to the terminal, which can also be called the second message Msg2.
  • the RAR can carry the identification ID of the detected preamble, a timing advance related command, and a temporary C-RNTI (Cell-RadioNetworkTemporaryIdentifier, Cell Radio Network Temporary Identifier) may also be called TC-RNTI, and may also carry resource allocation information, and the resource allocation information is used to instruct the terminal to send the resource of the random access message Msg3;
  • C-RNTI Cell-RadioNetworkTemporaryIdentifier, Cell Radio Network Temporary Identifier
  • the terminal After receiving the RAR, the terminal can send Msg3 to the base station.
  • Msg3 is mainly PUSCH, and the specific content carried in it is not fixed and depends on the actual scene;
  • the base station After receiving Msg3, the base station uses the contention resolution identification ID to send a contention resolution message to the terminal, which may be called the fourth message Msg4;
  • the terminal After receiving Msg4, the terminal obtains the contention resolution ID in it, and then sends an acknowledgment message to the base station on the Physical Uplink Control Channel (PUCCH), completing the four-step random access process.
  • PUCCH Physical Uplink Control Channel
  • the four-step access process requires at least two cycles of round-trip communication between the terminal and the base station, which will increase the delay of the access process to a certain extent, and also generate additional signaling overhead. Therefore, in some cases , these problems can be alleviated by two-step random access.
  • the terminal sends a random access message MsgA to the base station.
  • MsgA is composed of PRACH preamble and PUSCH, which is equivalent to Msg1 and Msg3 in the four-step random access process. It can be used in the four-step random access process
  • the PRACH occasion (PO) where Msg1 is transmitted can also be transmitted in an independent PO (for example, in a PO dedicated to two-step random access);
  • the base station After receiving MsgA, the base station sends MsgB to the terminal, which includes a random access response and a contention resolution message, which is equivalent to Msg2 and Msg4 in the four-step random access process.
  • the interaction between the base station and the terminal in the access process can be reduced, which is beneficial to reduce the delay of the access process and save signaling overhead.
  • the terminal and the base station communicate in the unlicensed frequency band.
  • the random access process requires fewer interactions, which is beneficial to the number of Listen Before Talk (LBT) attempts in the unlicensed frequency band.
  • LBT Listen Before Talk
  • the base station detects the PRACH preamble in MsgA, but fails to decode the PUSCH in MsgA correctly, then it can send a fallback RAR to the terminal.
  • the fallback RAR contains at least resource allocation information, such as the uplink authorization UL grant, It is used to instruct the terminal to transmit Msg3 resources. After the terminal receives the fallback RAR, it can send Msg3 according to the indicated resources, which is equivalent to falling back to the four-step random access process;
  • Case 3 The base station detects the PRACH preamble in MsgA and correctly decodes the PUSCH in MsgA, and can return MsgB to the terminal, which can carry a successful random access response successRAR, and successRAR can carry the contention resolution identification ID, C-RNTI , timing advance command, etc., the terminal can determine that the two-step random access process has been successfully completed after receiving the MsgB.
  • the base station configures the Initial UL BWP of the first type of terminal as the first Initial UL BWP, and configures the Initial UL BWP of the second type of terminal as the second Initial UL BWP.
  • the first type of terminal includes a reduced-capability RedCap terminal
  • the second type of terminal includes a non-RedCap terminal, which may also be called a traditional terminal or a Non-RedCap terminal.
  • an early indication can be performed through the PUSCH in MsgA.
  • the indication method can be an explicit indication or an implicit indication. It is used to indicate the type of terminal that the terminal initiates random access, for example, whether it is a RedCap terminal.
  • an explicit indication may refer to an explicit indication through an explicit indicator/character field/bit or the like.
  • implicit indication may refer to indication through coding or other means.
  • the base station can give RedCap terminals Configure a different initial uplink bandwidth part Initial UL BWP (Bandwidth Part) from non-RedCap terminals, so that RedCap terminals and non-RedCap terminals can use different Initial UL BWPs to initiate random access respectively.
  • Initial UL BWP Bandwidth Part
  • the Initial UL BWP configured by the base station for RedCap terminals is called the first Initial UL BWP
  • the Initial UL BWP configured for non-RedCap terminals is called the second Initial UL BWP
  • the first Initial UL BWP and the second Initial UL BWPs are different.
  • the base station does not correctly demodulate the PUSCH in MsgA, and cannot correctly obtain the early indication, so that the type of the terminal that initiates the random access cannot be determined, resulting in The base station cannot determine whether to configure the terminal to send Msg3 on the first Initial UL BWP or to send Msg3 on the second Initial UL BWP.
  • the RedCap terminal after the RedCap terminal sends MsgA to the base station, if it receives the RAR sent by the base station and determines that the received RAR is a fallback RAR, it can directly re-initiate random access in one embodiment, and in another In the embodiment, Msg3 may be sent according to the instruction of the base station.
  • the base station Since it is difficult for the base station to determine whether to configure the terminal to send Msg3 on the first Initial UL BWP or to send Msg3 on the second Initial UL BWP, the resources configured for the terminal to send Msg3 may not be appropriate. Therefore, the terminal directly re-initiates Random access can avoid communication problems caused by sending Msg3 on inappropriate resources, such as avoiding resource conflicts, and the base station can receive random access re-initiated by the terminal.
  • the base station can also instruct the terminal as needed, instructing the terminal to send Msg3 when receiving the fallback RAR, for example, instructing through the fallback RAR, or instructing through system information in advance. Accordingly, it is possible to flexibly control whether the terminal sends Msg3 when receiving the fallback RAR.
  • the base station may instruct the terminal to send Msg3 when receiving the fallback RAR, for example, indicate through the fallback RAR, or indicate through system information or other downlink signaling in advance, or according to the communication standard. Sure. Accordingly, it is possible to flexibly control whether the terminal sends Msg3 when receiving the fallback RAR.
  • Fig. 5 is a schematic flowchart of another random access method according to an embodiment of the present disclosure. As shown in Figure 5, the method also includes:
  • step S501 indicate to the terminal whether to re-initiate random access when the fallback RAR is received.
  • the Msg3 sent by the receiving terminal includes:
  • step S502 in response to indicating to the terminal not to re-initiate random access when the fallback RAR is received, receive Msg3 sent by the terminal according to the fallback RAR.
  • the base station can indicate to the terminal as needed, indicating whether the terminal will re-initiate random access after receiving the fallback RAR.
  • the indication of the base station can be realized through fallback RAR or broadcast information, such as through fallback RAR Instructions are made, or instructions are made in advance through broadcast information (such as system information).
  • the indication of the base station includes an explicit indication or an implicit indication, that is, the indication to the terminal may be indicated in an explicit manner, or may be indicated in an implicit manner.
  • the terminal can determine whether to re-initiate the random access according to the instruction of the base station, and if it is determined not to re-initiate the random access, it can send Msg3 to the base station, and then the base station can receive the The terminal re-initiates two-step random access or four-step random access in the case of determining to re-initiate random access according to the Msg3 sent by the fallback RAR. Accordingly, the base station can flexibly control whether the terminal sends Msg3 when receiving the fallback RAR.
  • Fig. 6 is a schematic flowchart of another random access method according to an embodiment of the present disclosure. As shown in Figure 6, the method also includes:
  • step S601 in response to determining that the terminal is configured with a preset configuration, the terminal of the first type is prohibited from carrying terminal type indication information in the PUSCH of MsgA.
  • the preset configuration may be configured by the base station to the terminal, determined by the terminal according to a communication protocol, or preset in the terminal.
  • the preset configuration includes at least one of the following:
  • the Initial UL BWP configured by the first type terminal is different from the Initial UL BWP configured by the second type terminal;
  • the Initial UL BWP configured by the first type terminal shares PRACH resources with the Initial UL BWP configured by the second type terminal;
  • the configured Initial UL BWP of the second type terminal is greater than the maximum bandwidth supported by the first type terminal
  • the mechanism for the first type terminal to carry terminal type indication information in Msg3 is invalid
  • the first type terminal transmits Msg3 based on an intra-slot frequency hopping scheme, and the frequency hopping range in the intra-slot frequency hopping scheme is greater than the maximum bandwidth supported by the first type terminal.
  • the Initial UL BWP configured by the first type of terminal when the Initial UL BWP configured by the first type of terminal is different from the Initial UL BWP configured by the second type of terminal, it will be difficult for the base station to accurately determine the configuration of the terminal in the first Initial UL BWP due to this situation. Whether to send Msg3 on the UL BWP or to send Msg3 on the second Initial UL BWP may cause inappropriate resources configured for the terminal to send Msg3.
  • the first type of terminal can be prohibited from carrying the terminal type indication information in the PUSCH of MsgA, for example, the RedCap terminal is prohibited from carrying early indication indicating the terminal type in the PUSCH of MsgA, so that the terminal will not carry the terminal type indication information in the PUSCH of MsgA, and then
  • the base station does not need to determine the type of the terminal by analyzing the PUSCH of MsgA, but can determine the type of the terminal in other ways, so that after the terminal type is accurately determined, it can be accurately determined whether the terminal is configured to send Msg3 on the first Initial UL BWP or on the second Initial UL BWP. Send Msg3 on the Initial UL BWP.
  • the Initial UL BWP configured for the first type terminal shares the PRACH resource with the Initial UL BWP configured for the second type terminal
  • the first type of terminal can be prohibited from carrying the terminal type indication information in the PUSCH of MsgA, for example, the RedCap terminal is prohibited from carrying early indication indicating the terminal type in the PUSCH of MsgA, so that the terminal will not carry the terminal type indication information in the PUSCH of MsgA, and then
  • the base station does not need to determine the type of the terminal by analyzing the PUSCH of MsgA, but can determine the type of the terminal in other ways, so that after the terminal type is accurately determined, it can be accurately determined whether the terminal is configured to send Msg3 on the first Initial UL BWP or on the second Initial UL BWP. Send Msg3 on the Initial UL BWP.
  • the base station may not be able to distinguish the two types of terminals based on the BWP where the random access is initiated. Two terminal types.
  • the Initial UL BWP configured by the second type of terminal is greater than the maximum bandwidth (maximum UE BW) supported by the first type of terminal
  • the second Initial UL BWP is greater than the maximum bandwidth supported by the first type of terminal
  • the first type of terminal cannot send Msg3 well on the second Initial UL BWP, so the first type of terminal can be prohibited from sending Msg3 on the MsgA
  • the terminal type indication information is carried in the PUSCH.
  • the RedCap terminal is prohibited from carrying early indication on the PUSCH of MsgA to indicate the terminal type, so that the terminal will not carry the terminal type indication information in the PUSCH of MsgA, and then the base station does not need to analyze the PUSCH of MsgA.
  • Determine the terminal type but determine the terminal type in other ways, so that after accurately determining the terminal type, accurately determine whether to configure the terminal to send Msg3 on the first Initial UL BWP or send Msg3 on the second Initial UL BWP
  • the terminal in the case where it is determined that the mechanism for carrying the terminal type indication information in Msg3 of the first type terminal is invalid, for example, the first type terminal is a RedCap terminal, and the terminal type indication information is early indication, the terminal cannot operate according to The Msg3 sent by fallback RAR carries terminal type indication information.
  • the first type of terminal can be prohibited from carrying the terminal type indication information in the PUSCH of MsgA, for example, the RedCap terminal is prohibited from carrying early indication indicating the terminal type in the PUSCH of MsgA, so that the terminal will not carry the terminal type indication information in the PUSCH of MsgA, and then
  • the base station does not need to determine the type of the terminal by analyzing the PUSCH of MsgA, but can determine the type of the terminal in other ways, so that after the terminal type is accurately determined, it can be accurately determined whether the terminal is configured to send Msg3 on the first Initial UL BWP or on the second Initial UL BWP. Send Msg3 on Initial UL BWP
  • the first type terminal determines that the first type terminal transmits Msg3 based on an intra-slot frequency hopping scheme, and the frequency hopping range in the intra-slot frequency hopping scheme is greater than that supported by the first type terminal In the case of the maximum bandwidth, even if the base station configures the first type of terminal to transmit Msg3 based on the intra-slot frequency hopping scheme through fallback RAR, since the frequency hopping range in the configured intra-slot frequency hopping scheme is greater than that supported by the first type of terminal The maximum bandwidth, the first type of terminal cannot well support the frequency hopping transmission of this scheme.
  • the first type of terminal can be prohibited from carrying the terminal type indication information in the PUSCH of MsgA, for example, the RedCap terminal is prohibited from carrying early indication indicating the terminal type in the PUSCH of MsgA, so that the terminal will not carry the terminal type indication information in the PUSCH of MsgA, and then
  • the base station does not need to determine the type of the terminal by analyzing the PUSCH of MsgA, but can determine the type of the terminal in other ways, so that after the terminal type is accurately determined, it can be accurately determined whether the terminal is configured to send Msg3 on the first Initial UL BWP or on the second Initial UL BWP. Send Msg3 on Initial UL BWP
  • the present disclosure also provides embodiments of the random access device.
  • Embodiments of the present disclosure propose a random access device, which is applicable to a first type of terminal, where the first type of terminal is configured to carry terminal type indication information in the physical uplink shared channel PUSCH of the random access message MsgA , the first type of terminal can communicate with a base station, the terminal includes but not limited to communication devices such as mobile phones, tablet computers, wearable devices, sensors, and Internet of Things devices, and the base station includes but not limited to 4G base stations, 5G base stations, Base stations in communication systems such as 6G base stations.
  • the terminal of the first type is configured to carry terminal type indication information in the physical uplink shared channel PUSCH of the random access message MsgA, and the apparatus includes one or more processors configured to for:
  • the processor is configured to:
  • the processor is configured to:
  • the two-step random access is re-initiated on the physical random access channel PRACH resource dedicated to the two-step random access.
  • the processor is configured to:
  • the four-step random access is re-initiated on the PRACH resource dedicated to the first type of terminal.
  • the processor is further configured to:
  • the processor is further configured to:
  • the indication of the base station includes an explicit indication or an implicit indication.
  • the indication of the base station is implemented through the fallback RAR or broadcast information.
  • the processor is configured to:
  • random access is re-initiated.
  • the processor is further configured to:
  • the preset configuration includes at least one of the following:
  • the initial uplink bandwidth part Initial UL BWP configured by the first type terminal is different from the Initial UL BWP configured by the second type terminal;
  • the Initial UL BWP configured by the first type terminal shares PRACH resources with the Initial UL BWP configured by the second type terminal;
  • the configured Initial UL BWP of the second type terminal is greater than the maximum bandwidth supported by the first type terminal
  • the mechanism for the first type terminal to carry terminal type indication information in Msg3 is invalid
  • the first type of terminal transmits Msg3 based on an intra-slot frequency hopping scheme, and the frequency hopping range in the intra-slot frequency hopping scheme is greater than the maximum bandwidth supported by the first type of terminal.
  • the first type of terminal includes a non-capability-reduced RedCap terminal
  • the second type of terminal includes a RedCap terminal
  • Embodiments of the present disclosure propose a random access device, the device may be applicable to a base station, and the base station may communicate with a terminal, for example, a first type of terminal, where the first type of terminal includes, for example, a reduced capability RedCap terminal, so
  • the terminals include but are not limited to communication devices such as mobile phones, tablet computers, wearable devices, sensors, and Internet of Things devices
  • the base stations include but are not limited to base stations in communication systems such as 4G base stations, 5G base stations, and 6G base stations.
  • the apparatus includes one or more processors configured to:
  • the random access re-initiated by the terminal is received.
  • the processor is further configured to:
  • the processor is configured to:
  • the processor is further configured to:
  • the preset configuration includes at least one of the following:
  • the Initial UL BWP configured by the first type terminal is different from the Initial UL BWP configured by the second type terminal;
  • the Initial UL BWP configured by the first type terminal shares PRACH resources with the Initial UL BWP configured by the second type terminal;
  • the configured Initial UL BWP of the second type terminal is greater than the maximum bandwidth supported by the first type terminal
  • the mechanism for the first type terminal to carry terminal type indication information in Msg3 is invalid
  • the first type terminal transmits Msg3 based on an intra-slot frequency hopping scheme, and the frequency hopping range in the intra-slot frequency hopping scheme is greater than the maximum bandwidth supported by the first type terminal.
  • the first type of terminal includes a non-capability-reduced RedCap terminal
  • the second type of terminal includes a RedCap terminal
  • the device embodiment since it basically corresponds to the method embodiment, for related parts, please refer to the part description of the method embodiment.
  • the device embodiments described above are only illustrative, and the modules described as separate components may or may not be physically separated, and the components shown as modules may or may not be physical modules, that is, they may be located in One place, or it can be distributed to multiple network modules. Part or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. It can be understood and implemented by those skilled in the art without creative effort.
  • Embodiments of the present disclosure also propose a communication device, including: a processor; a memory for storing a computer program; wherein, when the computer program is executed by the processor, it implements any of the above-mentioned embodiments applicable to the first A random access method for a type of terminal.
  • An embodiment of the present disclosure also proposes a communication device, including: a processor; a memory for storing a computer program; wherein, when the computer program is executed by the processor, it implements the method applicable to the base station described in any of the above embodiments. random access method.
  • Embodiments of the present disclosure also provide a computer-readable storage medium for storing a computer program.
  • the computer program is executed by a processor, the random Steps in the access method.
  • Embodiments of the present disclosure also provide a computer-readable storage medium for storing a computer program.
  • the computer program is executed by a processor, the random access method applicable to a base station described in any of the above embodiments is implemented. A step of.
  • FIG. 7 is a schematic block diagram of an apparatus 700 for random access according to an embodiment of the present disclosure.
  • Apparatus 700 may be provided as a base station.
  • the device 700 includes a processing component 722, a wireless transmitting/receiving component 724, an antenna component 726, and a signal processing part specific to a wireless interface.
  • the processing component 722 may further include one or more processors. One of the processors in the processing component 722 may be configured to implement the random access method applicable to the base station described in any of the above embodiments.
  • Fig. 8 is a schematic block diagram of an apparatus 800 for random access according to an embodiment of the present disclosure.
  • the apparatus 800 may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, and the like.
  • device 800 may include one or more of the following components: a processing component 802, a memory 804, a power supply component 806, a multimedia component 808, an audio component 810, an input/output (I/O) interface 812, a sensor component 814, and communication component 816 .
  • the processing component 802 generally controls the overall operations of the device 800, such as those associated with display, telephone calls, data communications, camera operations, and recording operations.
  • the processing component 802 may include one or more processors 820 to execute instructions to complete all or part of the steps of the random access method applicable to the first type of terminal described in any of the above embodiments.
  • processing component 802 may include one or more modules that facilitate interaction between processing component 802 and other components.
  • processing component 802 may include a multimedia module to facilitate interaction between multimedia component 808 and processing component 802 .
  • the memory 804 is configured to store various types of data to support operations at the device 800 . Examples of such data include instructions for any application or method operating on device 800, contact data, phonebook data, messages, pictures, videos, and the like.
  • the memory 804 can be implemented by any type of volatile or non-volatile storage device or their combination, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable Programmable Read Only Memory (EPROM), Programmable Read Only Memory (PROM), Read Only Memory (ROM), Magnetic Memory, Flash Memory, Magnetic or Optical Disk.
  • SRAM static random access memory
  • EEPROM electrically erasable programmable read-only memory
  • EPROM erasable Programmable Read Only Memory
  • PROM Programmable Read Only Memory
  • ROM Read Only Memory
  • Magnetic Memory Flash Memory
  • Magnetic or Optical Disk Magnetic Disk
  • the power supply component 806 provides power to the various components of the device 800 .
  • Power components 806 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for device 800 .
  • the multimedia component 808 includes a screen that provides an output interface between the device 800 and the user.
  • the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from a user.
  • the touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensor may not only sense a boundary of a touch or swipe action, but also detect a duration and pressure associated with the touch or swipe operation.
  • the multimedia component 808 includes a front camera and/or a rear camera. When the device 800 is in an operation mode, such as a shooting mode or a video mode, the front camera and/or the rear camera can receive external multimedia data. Each front camera and rear camera can be a fixed optical lens system or have focal length and optical zoom capability.
  • the audio component 810 is configured to output and/or input audio signals.
  • the audio component 810 includes a microphone (MIC) configured to receive external audio signals when the device 800 is in operation modes, such as call mode, recording mode and voice recognition mode. Received audio signals may be further stored in memory 804 or sent via communication component 816 .
  • the audio component 810 also includes a speaker for outputting audio signals.
  • the I/O interface 812 provides an interface between the processing component 802 and a peripheral interface module, which may be a keyboard, a click wheel, a button, and the like. These buttons may include, but are not limited to: a home button, volume buttons, start button, and lock button.
  • Sensor assembly 814 includes one or more sensors for providing status assessments of various aspects of device 800 .
  • the sensor component 814 can detect the open/closed state of the device 800, the relative positioning of components, such as the display and keypad of the device 800, and the sensor component 814 can also detect a change in the position of the device 800 or a component of the device 800 , the presence or absence of user contact with the device 800 , the orientation or acceleration/deceleration of the device 800 and the temperature change of the device 800 .
  • Sensor assembly 814 may include a proximity sensor configured to detect the presence of nearby objects in the absence of any physical contact.
  • Sensor assembly 814 may also include an optical sensor, such as a CMOS or CCD image sensor, for use in imaging applications.
  • the sensor component 814 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor or a temperature sensor.
  • the communication component 816 is configured to facilitate wired or wireless communication between the apparatus 800 and other devices.
  • the device 800 can access wireless networks based on communication standards, such as WiFi, 2G or 3G, 4G LTE, 5G NR or a combination thereof.
  • the communication component 816 receives broadcast signals or broadcast related information from an external broadcast management system via a broadcast channel.
  • the communication component 816 also includes a near field communication (NFC) module to facilitate short-range communication.
  • the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, Infrared Data Association (IrDA) technology, Ultra Wide Band (UWB) technology, Bluetooth (BT) technology and other technologies.
  • RFID Radio Frequency Identification
  • IrDA Infrared Data Association
  • UWB Ultra Wide Band
  • Bluetooth Bluetooth
  • apparatus 800 may be programmed by one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable Implemented by a gate array (FPGA), a controller, a microcontroller, a microprocessor, or other electronic components, and configured to execute the random access method applicable to the first type of terminal described in any of the foregoing embodiments.
  • ASICs application specific integrated circuits
  • DSPs digital signal processors
  • DSPDs digital signal processing devices
  • PLDs programmable logic devices
  • FPGA field programmable Implemented by a gate array (FPGA), a controller, a microcontroller, a microprocessor, or other electronic components, and configured to execute the random access method applicable to the first type of terminal described in any of the foregoing embodiments.
  • a non-transitory computer-readable storage medium including instructions such as a memory 804 including instructions, the instructions can be executed by the processor 820 of the device 800 to implement any of the above-mentioned embodiments.
  • a random access method suitable for a first type of terminal may be ROM, random access memory (RAM), CD-ROM, magnetic tape, floppy disk, optical data storage device, and the like.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

本公开涉及随机接入方法，包括：向基站发送MsgA；接收所述基站发送的随机接入响应RAR；响应于所述RAR为回退随机接入响应fallback RAR，重新发起随机接入或根据基站的指示发送Msg3。根据本公开，根据本公开，RedCap终端在向基站发送MsgA后，若接收到基站发送的RAR，并确定接收到的RAR为fallback RAR，可以直接重新发起随机接入，也可以根据基站的指示发送Msg3。由于基站难以确定配置终端在第一Initial UL BWP上发送Msg3，还是在第二Initial UL BWP上发送Msg3，可能导致配置给终端的用于发送Msg3的资源并不适当，因此，终端通过直接重新发起随机接入，可以避免在不适当的资源上发送Msg3而导致通信问题，例如避免资源冲突。

Description

随机接入方法、装置、通信装置和计算机可读存储介质 技术领域
本公开涉及通信技术领域，具体而言，涉及随机接入方法、随机接入装置、通信装置和计算机可读存储介质。
背景技术
随着通信技术的发展，为了适应新的通信场景，提出了能力降低(Reduced capability)终端，简称RedCap终端，也可以称作NR-lite，这种终端一般需要满足低造价、低复杂度，一定程度的增强覆盖，功率节省等条件。
由于RedCap终端和非RedCap(Non-RedCap)终端存在一定区别，在接入网络时，为了使得网络确定接入终端的类型，RedCap终端在发起随机接入时，可以携带指示自身类型的信息，例如在发起两步随机接入时，可以通过随机接入消息MsgA中的物理上行共享信道(Physical Uplink Shared Channel，PUSCH)进行早期指示early indication，用于指示发起随机接入的终端是否为RedCap终端。
如果基站没有正确解调MsgA中的PUSCH，可以通过向终端发送回退随机接入响应fallback RAR(Random Access Response)，其中携带有配置信息，以使终端根据配置信息向基站发送随机接入消息Msg3，Msg3为四步随机接入过程中的第三条消息，其中携带的内容与MsgA中的PUSCH相同或相近。但是在一些场景下，基站不能确定如何配置终端发送Msg3。
发明内容
有鉴于此，本公开的实施例提出了随机接入方法、随机接入装置、通信装置和计算机可读存储介质，以解决相关技术中的技术问题。
根据本公开实施例的第一方面，提出一种随机接入方法，适用于第一类型终端，所第一类型终端被配置了在随机接入消息MsgA的物理上行共享信道PUSCH中携带终端类型指示信息，所述方法包括：向基站发送MsgA；接收所述基站发送的随机接入响应RAR；响应于所述RAR为回退随机接入响应fallback RAR，重新发起随机接入或根据基站的指示发送Msg3。
根据本公开实施例的第二方面，提出一种随机接入方法，适用于基站，所述方法包括：接收第一类型终端发送的MsgA；向所述终端发送随机接入响应RAR，其中所述RAR为回退随机接入响应fallback RAR；接收终端重新发起的随机接入或接收终端发送的Msg3。
根据本公开实施例的第三方面，提出一种随机接入装置，适用于第一类型终端，所第一类型终端被配置了在随机接入消息MsgA的物理上行共享信道PUSCH中携带终端类型指示信息，所述装置包括一个或多个处理器，所述处理器被配置为：向基站发送MsgA；接收所述基站发送的随机接入响应RAR；响应于所述RAR为回退随机接入响应fallback RAR，重新发起随机接入或根据基站的指示发送Msg3。
根据本公开实施例的第四方面，提出一种随机接入装置，适用于基站，所述装置包括一个或多个处理器，所述处理器被配置为：接收第一类型终端发送的MsgA；向所述终端发送随机接入响应RAR，其中所述RAR为回退随机接入响应fallback RAR；接收终端重新发起的随机接入或接收终端发送的Msg3。
根据本公开实施例的第五方面，提出一种通信装置，包括：处理器；用于存储计算机程序的存储器；其中，当所述计算机程序被处理器执行时，实现上述任一实施例所述的适用于第一类型终端的随机接入方法。
根据本公开实施例的第六方面，提出一种通信装置，包括：处理器；用于存储计算机程序的存储器；其中，当所述计算机程序被处理器执行时，实现上述任一实施例所述的适用于基站的随机接入方法。
根据本公开实施例的第七方面，提出一种计算机可读存储介质，用于存储计算机程序，当所述计算机程序被处理器执行时，实现权上述任一实施例所述的适用于第一类型终端的随机接入方法中的步骤。
根据本公开实施例的第八方面，提出一种计算机可读存储介质，用于存储计算机程序，当所述计算机程序被处理器执行时，实现上述任一实施例所述的适用于基站的随机接入方法中的步骤。
根据本公开的实施例，RedCap终端在向基站发送MsgA后，若接收到基站发送的RAR，并确定接收到的RAR为fallback RAR，在一个实施例中可以直接重新发起随机接入，在另一个实施例中则可以根据基站的指示发送Msg3。
由于基站难以确定配置终端在第一Initial UL BWP上发送Msg3，还是在第二 Initial UL BWP上发送Msg3，可能导致配置给终端的用于发送Msg3的资源并不适当，因此，终端通过直接重新发起随机接入，可以避免在不适当的资源上发送Msg3而导致通信问题，例如避免资源冲突。
附图说明
为了更清楚地说明本公开实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本公开的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1是根据本公开的实施例示出的一种随机接入方法的示意流程图。
图2是根据本公开的实施例示出的另一种随机接入方法的示意流程图。
图3是根据本公开的实施例示出的又一种随机接入方法的示意流程图。
图4是根据本公开的实施例示出的一种随机接入方法的示意流程图。
图5是根据本公开的实施例示出的另一种随机接入方法的示意流程图。
图6是根据本公开的实施例示出的又一种随机接入方法的示意流程图。
图7是根据本公开的实施例示出的一种用于随机接入的装置的示意框图。
图8是根据本公开的实施例示出的一种用于随机接入的装置的示意框图。
具体实施方式
下面将结合本公开实施例中的附图，对本公开实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本公开一部分实施例，而不是全部的实施例。基于本公开中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本公开保护的范围。
在本公开实施例使用的术语是仅仅出于描述特定实施例的目的，而非旨在限制本公开实施例。在本公开实施例和所附权利要求书中所使用的单数形式的“一种”和“该”也旨在包括多数形式，除非上下文清楚地表示其他含义。还应当理解，本文中使用的术语“和/或”是指并包含一个或多个相关联的列出项目的任何或所有可能组合。
应当理解，尽管在本公开实施例可能采用术语第一、第二、第三等来描述各种 信息，但这些信息不应限于这些术语。这些术语仅用来将同一类型的信息彼此区分开。例如，在不脱离本公开实施例范围的情况下，第一信息也可以被称为第二信息，类似地，第二信息也可以被称为第一信息。取决于语境，如在此所使用的词语“如果”可以被解释成为“在……时”或“当……时”或“响应于确定”。
出于简洁和便于理解的目的，本文在表征大小关系时，所使用的术语为“大于”或“小于”、“高于”或“低于”。但对于本领域技术人员来说，可以理解：术语“大于”也涵盖了“大于等于”的含义，“小于”也涵盖了“小于等于”的含义；术语“高于”涵盖了“高于等于”的含义，“低于”也涵盖了“低于等于”的含义。
图1是根据本公开的实施例示出的一种随机接入方法的示意流程图。本实施例所示的随机接入方法可以适用于第一类型终端，所第一类型终端被配置了在随机接入消息MsgA的物理上行共享信道PUSCH中携带终端类型指示信息，所述第一类型终端可以与基站通信，所述终端包括但不限于手机、平板电脑、可穿戴设备、传感器、物联网设备等通信装置，所述基站包括但不限于4G基站、5G基站、6G基站等通信系统中的基站。
如图1所示，所述种随机接入方法发起可以包括以下步骤：
在步骤S101中，向基站发送随机接入消息MsgA；
在步骤S102中，接收所述基站发送的随机接入响应RAR；
在步骤S103中，响应于所述RAR为回退随机接入响应fallback RAR，重新发起随机接入或根据基站的指示发送Msg3。
在一个实施例中，终端可以向基站发起随机接入以接入基站，例如发起两步随机接入或者发起四步随机接入。
在四步随机接入过程中，随机接入消息MsgA为第一消息Msg1。即：终端首先向终端发送随机接入消息Msg1，其中携带有物理随机接入信道(Physical Random Access Channel，PRACH)前导码preamble；
基站在检测到前导码后，向终端发送随机接入响应RAR，也可以称作第二消息Msg2，RAR中可以携带有检测到的前导码的标识ID、定时提前量相关命令、临时C-RNTI(Cell-RadioNetworkTemporaryIdentifier，小区无线网络临时标识)也可以称作TC-RNTI，还可以携带有资源分配信息，资源分配信息用于指示终端发送随机接入消息Msg3的资源；
终端在接收到RAR后，可以向基站发送第三消息Msg3，Msg3主要是PUSCH，其中携带的具体内容不固定，取决于实际场景；
基站接收到Msg3后，使用竞争解决标识ID向终端发送竞争解决消息，可以称作第四消息Msg4；
终端接收到Msg4后，获取其中的竞争解决标识ID，然后在物理上行控制信道(Physical Uplink Control Channel，PUCCH)上向基站发送确认消息，完成四步随机接入过程。
可见，四步接入过程至少需要终端与基站之间往返通信两个周期，这在一定程度上会增加接入过程的时延，并且还产生了额外的信令开销，因此，在一些情况下，可以通过两步随机接入来缓解这些问题。
在两步随机接入过程中，终端向基站发送随机接入消息MsgA，MsgA由PRACH前导码和PUSCH组成，相当于四步随时接入过程中的Msg1和Msg3，可以在四步随机接入过程传输Msg1的PRACH场合(PO)传输，也可以独立的PO(例如在两步随机接入专用PO)中传输；
基站接收到MsgA后，向终端发送响应消息MsgB，其中包括随机接入响应和竞争解决消息，相当于四步随机接入过程中的Msg2和Msg4。
可见，基于两步随机接入过程可以减少接入过程中基站与终端的交互过程，有利于降低接入过程的时延，节约信令开销，例如终端与基站在非授权频段通信，由于两步随机接入过程所需交互次数较少，有利于对非授权频段先听后说(Listen Before Talk，LBT)尝试次数。
在两步随机接入过程中，终端在发送随机接入消息MsgA后，接收基站发送响应消息MsgB，可以存三种情况：
情况一，基站没有检测到MsgA中的PRACH前导码，从而没有向终端发送响应，也就没有向终端发送MsgB，终端等待后没有接收到MsgB，可以重新发送MsgA，或者回退到四步随机接入过程发送Msg1；
情况二，基站检测到了MsgA中的PRACH前导码，但是对于MsgA中的PUSCH未能正确解码，那么可以向终端发送fallback RAR，fallback RAR中至少携带有资源分配信息，例如上行链路授权UL grant，用于指示终端传输Msg3的资源，终端接收到fallback RAR后，则可以根据所指示的资源发送Msg3，相当于回退到四步随机接入过 程；
情况三，基站检测到了MsgA中的PRACH前导码，对于MsgA中的PUSCH也正确解码了，可以向终端返回MsgB，其中可以携带成功随机接入响应successRAR，successRAR可以携带竞争解决标识ID、C-RNTI、定时提前量命令等，终端接收到MsgB可以确定成功完成两步随机接入过程。
在一个实施例中，基站配置第一类型终端的Initial UL BWP为第一Initial UL BWP，配置第二类型终端的Initial UL BWP为第二Initial UL BWP。
在一个实施例中，所述第一类型终端包括能力降低RedCap终端，所述第二类型终端包括非RedCap终端，也可以称作传统终端、Non-RedCap终端。
对于RedCap终端，为了使得网络能够尽快确定终端的类型，在发起两步随机接入过程时，可以通过MsgA中的PUSCH进行早期指示early indication，指示方式可以是显示指示，也可以是隐式指示，用于指示终端发起随机接入的终端的类型，例如是否为RedCap终端。
另外，由于网络中可以存在传统(legacy)终端，也即非能力降低RedCap(Non-RedCap)终端，也可以存在能力降低RedCap终端，为了避免不同类型终端之间发起随机接入出现冲突，基站可以给RedCap终端和非RedCap终端配置不同的初始上行带宽部分Initial UL BWP(Bandwidth Part)，使得RedCap终端和非RedCap终端可以分别使用不同的Initial UL BWP发起随机接入。
以下为了方便描述，给RedCap终端配置的Initial UL BWP称作第一Initial UL BWP，给非RedCap终端配置的Initial UL BWP称作第二Initial UL BWP，第一Initial UL BWP和第二Initial UL BWP不同。在本公开的所有实施例中，第一Initial UL BWP和第二Initial UL BWP不同可以示例性的为以下的一种或多种情况：
第一Initial UL BWP和第二Initial UL BWP的宽带宽度不同；
第一Initial UL BWP和第二Initial UL BWP的起始位置和/或结束位置不同。
在一些可能的实施方式中，第一Initial UL BWP和第二Initial UL BWP可以有重叠的部分，或第一Initial UL BWP和第二Initial UL BWP完全不重叠，或第一Initial UL BWP完全包含在第二Initial UL BWP内，或第二Initial UL BWP完全包含在第一Initial UL BWP内。
在一种可能的实现方式中，给RedCap终端配置的Initial UL BWP称作第一Initial UL BWP，专供RedCap终端使用。给非RedCap终端配置的Initial UL BWP称作第二Initial UL BWP，既可以配置给RedCap终端使用，也可以配置给非RedCap终端使用。
在这种情况下，对于上述两步随机接入的情况二，基站没有正确解调MsgA中的PUSCH，也就不能正确获取到early indication，从而不能确定发起随机接入的终端的类型，进而导致基站不能确定配置终端在第一Initial UL BWP上发送Msg3，还是在第二Initial UL BWP上发送Msg3。
根据本公开的实施例，RedCap终端在向基站发送MsgA后，若接收到基站发送的RAR，并确定接收到的RAR为fallback RAR，在一个可能的实施例中可以直接重新发起随机接入，在另一个可能的实施例中则可以根据基站的指示发送Msg3。
由于基站难以确定配置终端在第一Initial UL BWP上发送Msg3，还是在第二Initial UL BWP上发送Msg3，可能导致配置给终端的用于发送Msg3的资源并不适当，因此，终端通过直接重新发起随机接入，可以避免在不适当的资源上发送Msg3而导致通信问题，例如避免资源冲突。
另外，基站也可以根据需要进行对终端进行指示，指示终端在接收到fallback RAR的情况下发送Msg3，例如通过fallback RAR进行指示，或者预先通过系统信息或其他下行信令进行指示，或根据通信标准来确定。据此，可以灵活控制终端是否在接收到fallback RAR的情况下发送Msg3。
在一个实施例中，所述重新发起随机接入包括：
重新发起两步随机接入；或者
重新发起四步随机接入。
在一个实施例中，终端重新发起的随机接入，可以是两步随机接入，也可以是四步随机接入，具体可以根据需要进行设置。
在一个实施例中，所述重新发起两步随机接入包括：
在两步随机接入专用的物理随机接入信道PRACH资源重新发起两步随机接入。
在一个实施例中，所述重新发起四步随机接入包括：
在第一类型终端专用的PRACH资源重新发起四步随机接入。
图2是根据本公开的实施例示出的另一种随机接入方法的示意流程图。如图2所示，在根据基站的指示发送Msg3之前，所述方法还包括：
在步骤S201中，根据所述基站的指示确定是否在接收到fallback RAR的情况下重新发起随机接入。
在一个实施例中，所述方法还包括：
在步骤S202中，响应于确定在接收到fallback RAR的情况下不重新发起随机接入，根据所述fallback RAR向所述基站发送随机接入消息Msg3。
在一个实施例中，基站可以根据需要进行对终端进行指示，指示终端在接收到fallback RAR的情况下是否重新发起随机接入，例如基站的指示可以通过fallback RAR或广播信息实现，例如通过fallback RAR进行指示，或者预先通过广播信息(例如系统信息)进行指示。其中，所述基站的指示包括显示指示或隐式指示，也即可以通过显示方式对终端进行指示，也可以通过隐式方式对终端进行指示。
终端可以根据所述基站的指示确定是否在接收到fallback RAR的情况下重新发起随机接入，在确定不重新发起随机接入的情况下，可以向所述基站发送Msg3，在确定重新发起随机接入的情况下，重新发起两步随机接入或四步随机接入。据此，基站可以灵活控制终端是否在接收到fallback RAR的情况下发送Msg3。
图3是根据本公开的实施例示出的又一种随机接入方法的示意流程图。如图3所示，所述响应于所述RAR为回退随机接入响应fallback RAR，重新发起随机接入包括：
在步骤S301中，响应于所述RAR为回退随机接入响应fallback RAR，确定是否被配置了预设配置；
在步骤S302中，响应于确定终端配置有预设配置，重新发起随机接入。
在另一个实施例中，所述方法包括：
在步骤S301中，响应于所述RAR为回退随机接入响应fallback RAR，确定是否被配置了预设配置；
在步骤S303中，响应于未被配置预设配置，向所述基站发送Msg3。
在又一个实施例中，所述方法还包括：
在步骤S301中，响应于所述RAR为回退随机接入响应fallback RAR，确定是否被配置了预设配置；
在步骤S302中，响应于确定终端配置有预设配置，重新发起随机接入。
在步骤S301中，响应于所述RAR为回退随机接入响应fallback RAR，确定是否被配置了预设配置；
在步骤S303中，响应于未被配置预设配置，向所述基站发送Msg3。
在一个实施例中，除了上述基站指示的方式，基站还可以通过为终端配置预设配置，使得终端在接收到fallback RAR的情况下，不基于fallback RAR发送Msg3，而是重新发起随机接入。
在本公开的实施例中，该预设配置可以为基站配置给终端的，或是终端根据通信协议确定的，或是预设在终端内的。
在一个实施例中，所述预设配置包括以下至少之一：
所述第一类型终端被配置的初始上行带宽部分Initial UL BWP，与第二类型终端被配置的Initial UL BWP不同；
所述第一类型终端被配置的Initial UL BWP，与第二类型终端被配置的Initial UL BWP共享PRACH资源；
第二类型终端被配置的Initial UL BWP，大于所述第一类型终端支持的最大带宽；
所述第一类型终端在Msg3中携带终端类型指示信息的机制被无效(disable)；
所述第一类型终端基于时隙内跳频(intra-slot frequency hopping，)方案传输Msg3，且时隙内跳频方案中的跳频幅度大于所述第一类型终端支持的最大带宽。
上述实施方式中，不同的预设配置可以基于不同的方式确定，在此不再赘述。
在一个实施例中，所述第一类型终端在确定第一类型终端被配置的Initial UL BWP，与第二类型终端被配置的Initial UL BWP不同的情况下，由于这种情况会导致基站难以准确确定配置终端在第一Initial UL BWP上发送Msg3，还是在第二Initial UL BWP上发送Msg3，可能导致配置给终端的用于发送Msg3的资源并不适当，因此可以在接收到fallback RAR的情况下，不基于fallback RAR发送Msg3，而是重新发起随机接入，避免在不适当的资源上发送Msg3而导致通信问题，例如避免资源冲突。
在一个实施例中，所述第一类型终端在确定所述第一类型终端被配置的Initial UL BWP，与第二类型终端被配置的Initial UL BWP共享PRACH资源的情况下，基站难以根据两种终端发起随机接入所在的BWP区分两种终端的类型，因此难以准确确定配置终端在第一Initial UL BWP上发送Msg3，还是在第二Initial UL BWP上发送Msg3，可能导致配置给终端的用于发送Msg3的资源并不适当，因此可以在接收到fallback RAR的情况下，不基于fallback RAR发送Msg3，而是重新发起随机接入，避免在不适当的资源上发送Msg3而导致通信问题，例如避免资源冲突。
需要说明的是，即使第一类型终端被配置的Initial UL BWP，与第二类型终端被配置的Initial UL BWP不共享PRACH资源，基站也不一定能够根据两种终端发起随机接入所在的BWP区分两种终端的类型。
在一个实施例中，所述第一类型终端在确定第二类型终端被配置的Initial UL BWP，大于所述第一类型终端支持的最大带宽(maximum UE BW)的情况下，即使基站通过fallback RAR配置第一类型终端在第二Initial UL BWP上发送Msg3，由于第二Initial UL BWP大于第一类型终端支持的最大带宽，第一类型终端也不能良好地在第二Initial UL BWP上发送Msg3，因此可以不基于fallback RAR发送Msg3，而是重新发起随机接入，避免在不支持的带宽上发送Msg3出现问题。
在一个实施例中，所述第一类型终端在确定所述第一类型终端在Msg3中携带终端类型指示信息的机制被无效的情况下，例如第一类型终端为RedCap终端，终端类型指示信息为early indication，终端就不能在根据fallback RAR发送的Msg3中携带终端类型指示信息，但是可以在后续发起的随机接入过程中，携带终端类型指示信息，因此可以重新发起随机接入过程，并携带终端类型指示信息发送至基站。
在一个实施例中，所述第一类型终端在确定所述第一类型终端基于时隙内跳频方案传输Msg3，且时隙内跳频方案中的跳频幅度大于所述第一类型终端支持的最大带宽的情况下，即使基站通过fallback RAR配置第一类型终端基于时隙内跳频方案传输送Msg3，由于所配置的时隙内跳频方案中的跳频幅度大于第一类型终端支持的最大带宽，第一类型终端不能良好支持这种方案的跳频传输，因此可以不基于fallback RAR发送Msg3，而是重新发起随机接入，避免基于不支持的跳频方案发送Msg3出现问题。
图4是根据本公开的实施例示出的一种随机接入方法的示意流程图。本实施例所示的随机接入方法可以适用于基站，所述基站可以与终端进行通信，例如与第一类型终端通信，第一类型终端例如包括降低能力RedCap终端，所述终端包括但不限于 手机、平板电脑、可穿戴设备、传感器、物联网设备等通信装置，所述基站包括但不限于4G基站、5G基站、6G基站等通信系统中的基站。
如图4所示，所述随机接入方法包括：
在步骤S401中，接收第一类型终端发送的MsgA；
在步骤S402中，向所述终端发送随机接入响应RAR，其中所述RAR为回退随机接入响应fallback RAR；
在步骤S403中，接收终端重新发起的随机接入或接收终端发送的Msg3。
在一种可能的实现方式中，所述基站是响应于未正确解调所述MsgA中的PUSCH，向所述终端发送fallback RAR；在另一种可能的实现方式中，所述基站是响应于未能在MsgA中解调出对应的Preamble。随后将会详细说明。
在一种实现方式中，响应于终端配置有预设配置且接收到fallback RAR，则所述终端重新发起随机接入。在另一种实现方式中，响应于终端未配置有预设配置且接收到fallback RAR，则所述终端向基站发送Msg3。
即：所述步骤403可以为：接收终端重新发起的随机接入；所述随机接入是所述终端配置有预设配置且接收到fallback RAR的情况下，所述终端重新发起的随机接入。
或，所述步骤403可以为：接收终端发送的Msg3；其中所述Msg3为所述终端未配置有预设配置且接收到fallback RAR的情况下，所述终端发送的Msg3。
在一个实施例中，终端可以向基站发起随机接入以接入基站，例如发起两步随机接入或者发起四步随机接入。
在四步随机接入过程中，终端首先向终端发送随机接入消息Msg1，其中携带有物理随机接入信道(Physical Random Access Channel，PRACH)前导码preamble；
基站在检测到前导码后，向终端发送随机接入响应RAR，也可以称作第二消息Msg2，RAR中可以携带有检测到的前导码的标识ID、定时提前量相关命令、临时C-RNTI(Cell-RadioNetworkTemporaryIdentifier，小区无线网络临时标识)也可以称作TC-RNTI，还可以携带有资源分配信息，资源分配信息用于指示终端发送随机接入消息Msg3的资源；
终端在接收到RAR后，可以向基站发送Msg3，Msg3主要是PUSCH，其中携 带的具体内容不固定，取决于实际场景；
基站接收到Msg3后，使用竞争解决标识ID向终端发送竞争解决消息，可以称作第四消息Msg4；
终端接收到Msg4后，获取其中的竞争解决标识ID，然后在物理上行控制信道(Physical Uplink Control Channel，PUCCH)上向基站发送确认消息，完成四步随机接入过程。
可见，四步接入过程至少需要终端与基站之间往返通信两个周期，这在一定程度上会增加接入过程的时延，并且还产生了额外的信令开销，因此，在一些情况下，可以通过两步随机接入来缓解这些问题。
在两步随机接入过程中，终端向基站发送随机接入消息MsgA，MsgA由PRACH前导码和PUSCH组成，相当于四步随时接入过程中的Msg1和Msg3，可以在四步随机接入过程传输Msg1的PRACH场合(PO)传输，也可以独立的PO(例如在两步随机接入专用PO)中传输；
基站接收到MsgA后，向终端发送MsgB，其中包括随机接入响应和竞争解决消息，相当于四步随机接入过程中的Msg2和Msg4。
可见，基于两步随机接入过程可以减少接入过程中基站与终端的交互过程，有利于降低接入过程的时延，节约信令开销，例如终端与基站在非授权频段通信，由于两步随机接入过程所需交互次数较少，有利于对非授权频段先听后说(Listen Before Talk，LBT)尝试次数。
在两步随机接入过程中，终端在发送MsgA后，接收基站发送MsgB，可以存三种情况：
情况一，基站没有检测到MsgA中的PRACH前导码，从而没有向终端发送响应，也就没有向终端发送MsgB，终端等待后没有接收到MsgB，可以重新发送MsgA，或者回退到四步随机接入过程发送Msg1；
情况二，基站检测到了MsgA中的PRACH前导码，但是对于MsgA中的PUSCH未能正确解码，那么可以向终端发送fallback RAR，fallback RAR中至少携带有资源分配信息，例如上行链路授权UL grant，用于指示终端传输Msg3的资源，终端接收到fallback RAR后，则可以根据所指示的资源发送Msg3，相当于回退到四步随机接入过程；
情况三，基站检测到了MsgA中的PRACH前导码，对于MsgA中的PUSCH也正确解码了，可以向终端返回MsgB，其中可以携带成功随机接入响应successRAR，successRAR可以携带竞争解决标识ID、C-RNTI、定时提前量命令等，终端接收到MsgB可以确定成功完成两步随机接入过程。
在一个实施例中，基站配置第一类型终端的Initial UL BWP为第一Initial UL BWP，配置第二类型终端的Initial UL BWP为第二Initial UL BWP。
在一个实施例中，所述第一类型终端包括能力降低RedCap终端，所述第二类型终端包括非RedCap终端，也可以称作传统终端、Non-RedCap终端。
对于RedCap终端，为了使得网络能够尽快确定终端的类型，在发起两步随机接入过程时，可以通过MsgA中的PUSCH进行早期指示early indication，指示方式可以是显示指示，也可以是隐式指示，用于指示终端发起随机接入的终端的类型，例如是否为RedCap终端。在本公开的所有实施例中，显性指示可以是指通过一个明确的指示符/字符域/bit等明确的方式进行指示。在本公开的所有实施例中，隐性指示可以是指通过编码方式或其他方式进行指示。
另外，由于网络中可以存在传统终端，也即非能力降低RedCap(Non-RedCap)终端，也可以存在能力降低RedCap终端，为了避免不同类型终端之间发起随机接入出现冲突，基站可以给RedCap终端和非RedCap终端配置不同的初始上行带宽部分Initial UL BWP(Bandwidth Part)，使得RedCap终端和非RedCap终端可以分别使用不同的Initial UL BWP发起随机接入。
以下为了方便描述，将基站给RedCap终端配置的Initial UL BWP称作第一Initial UL BWP，给非RedCap终端配置的Initial UL BWP称作第二Initial UL BWP，第一Initial UL BWP和第二Initial UL BWP不同。
在这种情况下，对于上述两步随机接入的情况二，基站没有正确解调MsgA中的PUSCH，也就不能正确获取到early indication，从而不能确定发起随机接入的终端的类型，进而导致基站不能确定配置终端在第一Initial UL BWP上发送Msg3，还是在第二Initial UL BWP上发送Msg3。
根据本公开的实施例，RedCap终端在向基站发送MsgA后，若接收到基站发送的RAR，并确定接收到的RAR为fallback RAR，在一个实施例中可以直接重新发起随机接入，在另一个实施例中则可以根据基站的指示发送Msg3。
由于基站难以确定配置终端在第一Initial UL BWP上发送Msg3，还是在第二Initial UL BWP上发送Msg3，可能导致配置给终端的用于发送Msg3的资源并不适当，因此，终端通过直接重新发起随机接入，可以避免在不适当的资源上发送Msg3而导致通信问题，例如避免资源冲突，基站则可以接收终端重新发起的随机接入。
另外，基站也可以根据需要进行对终端进行指示，指示终端在接收到fallback RAR的情况下发送Msg3，例如通过fallback RAR进行指示，或者预先通过系统信息进行指示。据此，可以灵活控制终端是否在接收到fallback RAR的情况下发送Msg3。在本公开的实施例中，基站可以根据需要指示终端在接收到fallback RAR的情况下发送Msg3，例如通过fallback RAR进行指示，或者预先通过系统信息或其他下行信令进行指示，或根据通信标准来确定。据此，可以灵活控制终端是否在接收到fallback RAR的情况下发送Msg3。
图5是根据本公开的实施例示出的另一种随机接入方法的示意流程图。如图5所示，所述方法还包括：
在步骤S501中，向终端指示是否在接收到fallback RAR的情况下重新发起随机接入。
在一个实施例中，所述接收终端发送的Msg3包括：
在步骤S502中，响应于向终端指示在接收到fallback RAR的情况下不重新发起随机接入，接收所述终端根据所述fallback RAR发送的Msg3。
在一个实施例中，基站可以根据需要进行对终端进行指示，指示终端在接收到fallback RAR的情况下是否重新发起随机接入，例如基站的指示可以通过fallback RAR或广播信息实现，例如通过fallback RAR进行指示，或者预先通过广播信息(例如系统信息)进行指示。其中，所述基站的指示包括显示指示或隐式指示，也即可以通过显示方式对终端进行指示，也可以通过隐式方式对终端进行指示。
终端可以根据所述基站的指示确定是否在接收到fallback RAR的情况下重新发起随机接入，在确定不重新发起随机接入的情况下，可以向所述基站发送Msg3，那么基站则可以接收所述终端根据所述fallback RAR发送的Msg3，在确定重新发起随机接入的情况下，重新发起两步随机接入或四步随机接入。据此，基站可以灵活控制终端是否在接收到fallback RAR的情况下发送Msg3。
图6是根据本公开的实施例示出的又一种随机接入方法的示意流程图。如图6 所示，所述方法还包括：
在步骤S601中，响应于确定所述终端配置了预设配置，禁止所述第一类型终端在MsgA的PUSCH中携带终端类型指示信息。
在本公开的实施例中，该预设配置可以为基站配置给终端的，或是终端根据通信协议确定的，或是预设在终端内的。
在一个实施例中，所述预设配置包括以下至少之一：
所述第一类型终端被配置的Initial UL BWP，与第二类型终端被配置的Initial UL BWP不同；
所述第一类型终端被配置的Initial UL BWP，与第二类型终端被配置的Initial UL BWP共享PRACH资源；
第二类型终端被配置的Initial UL BWP，大于所述第一类型终端支持的最大带宽；
所述第一类型终端在Msg3中携带终端类型指示信息的机制被无效；
所述第一类型终端基于时隙内跳频方案传输Msg3，且时隙内跳频方案中的跳频幅度大于所述第一类型终端支持的最大带宽。
上述实施方式中，不同的预设配置可以基于不同的方式确定，在此不再赘述。
在一个实施例中，在第一类型终端被配置的Initial UL BWP，与第二类型终端被配置的Initial UL BWP不同的情况下，由于这种情况会导致基站难以准确确定配置终端在第一Initial UL BWP上发送Msg3，还是在第二Initial UL BWP上发送Msg3，可能导致配置给终端的用于发送Msg3的资源并不适当。那么可以禁止第一类型终端在MsgA的PUSCH中携带终端类型指示信息，例如禁止RedCap终端在MsgA的PUSCH携带early indication指示终端类型，从而终端就不会在MsgA的PUSCH中携带终端类型指示信息，进而基站也就无需通过解析MsgA的PUSCH来确定终端的类型，而是可以通过其他方式确定终端类型，以便准确确定终端类型后，准确确定配置终端在第一Initial UL BWP上发送Msg3，还是在第二Initial UL BWP上发送Msg3。
在一个实施例中，在第一类型终端被配置的Initial UL BWP，与第二类型终端被配置的Initial UL BWP共享PRACH资源的情况下，基站难以根据两种终端发起随机接入所在的BWP区分两种终端的类型，因此难以准确确定配置终端在第一Initial UL  BWP上发送Msg3，还是在第二Initial UL BWP上发送Msg3，可能导致配置给终端的用于发送Msg3的资源并不适当。那么可以禁止第一类型终端在MsgA的PUSCH中携带终端类型指示信息，例如禁止RedCap终端在MsgA的PUSCH携带early indication指示终端类型，从而终端就不会在MsgA的PUSCH中携带终端类型指示信息，进而基站也就无需通过解析MsgA的PUSCH来确定终端的类型，而是可以通过其他方式确定终端类型，以便准确确定终端类型后，准确确定配置终端在第一Initial UL BWP上发送Msg3，还是在第二Initial UL BWP上发送Msg3。
需要说明的是，即使第一类型终端被配置的Initial UL BWP，与第二类型终端被配置的Initial UL BWP不共享PRACH资源，基站也不一定能够根据两种终端发起随机接入所在的BWP区分两种终端的类型。
在一个实施例中，在第二类型终端被配置的Initial UL BWP，大于第一类型终端支持的最大带宽(maximum UE BW)的情况下，即使基站通过fallback RAR配置第一类型终端在第二Initial UL BWP上发送Msg3，由于第二Initial UL BWP大于第一类型终端支持的最大带宽，第一类型终端也不能良好地在第二Initial UL BWP上发送Msg3，那么可以禁止第一类型终端在MsgA的PUSCH中携带终端类型指示信息，例如禁止RedCap终端在MsgA的PUSCH携带early indication指示终端类型，从而终端就不会在MsgA的PUSCH中携带终端类型指示信息，进而基站也就无需通过解析MsgA的PUSCH来确定终端的类型，而是可以通过其他方式确定终端类型，以便准确确定终端类型后，准确确定配置终端在第一Initial UL BWP上发送Msg3，还是在第二Initial UL BWP上发送Msg3
在一个实施例中，在确定第一类型终端在Msg3中携带终端类型指示信息的机制被无效的情况下，例如第一类型终端为RedCap终端，终端类型指示信息为early indication，终端就不能在根据fallback RAR发送的Msg3中携带终端类型指示信息。那么可以禁止第一类型终端在MsgA的PUSCH中携带终端类型指示信息，例如禁止RedCap终端在MsgA的PUSCH携带early indication指示终端类型，从而终端就不会在MsgA的PUSCH中携带终端类型指示信息，进而基站也就无需通过解析MsgA的PUSCH来确定终端的类型，而是可以通过其他方式确定终端类型，以便准确确定终端类型后，准确确定配置终端在第一Initial UL BWP上发送Msg3，还是在第二Initial UL BWP上发送Msg3
在一个实施例中，所述第一类型终端在确定所述第一类型终端基于时隙内跳频 方案传输Msg3，且时隙内跳频方案中的跳频幅度大于所述第一类型终端支持的最大带宽的情况下，即使基站通过fallback RAR配置第一类型终端基于时隙内跳频方案传输送Msg3，由于所配置的时隙内跳频方案中的跳频幅度大于第一类型终端支持的最大带宽，第一类型终端不能良好支持这种方案的跳频传输。那么可以禁止第一类型终端在MsgA的PUSCH中携带终端类型指示信息，例如禁止RedCap终端在MsgA的PUSCH携带early indication指示终端类型，从而终端就不会在MsgA的PUSCH中携带终端类型指示信息，进而基站也就无需通过解析MsgA的PUSCH来确定终端的类型，而是可以通过其他方式确定终端类型，以便准确确定终端类型后，准确确定配置终端在第一Initial UL BWP上发送Msg3，还是在第二Initial UL BWP上发送Msg3
与前述的随机接入方法的实施例相对应，本公开还提供了随机接入装置的实施例。
本公开的实施例提出一种随机接入装置，所述装置可以适用于第一类型终端，所第一类型终端被配置了在随机接入消息MsgA的物理上行共享信道PUSCH中携带终端类型指示信息，所述第一类型终端可以与基站通信，所述终端包括但不限于手机、平板电脑、可穿戴设备、传感器、物联网设备等通信装置，所述基站包括但不限于4G基站、5G基站、6G基站等通信系统中的基站。
在一个实施例中，所第一类型终端被配置了在随机接入消息MsgA的物理上行共享信道PUSCH中携带终端类型指示信息，所述装置包括一个或多个处理器，所述处理器被配置为：
向基站发送MsgA；
接收所述基站发送的随机接入响应RAR；
响应于所述RAR为回退随机接入响应fallback RAR，重新发起随机接入或根据基站的指示发送Msg3。
在一个实施例中，所述处理器被配置为：
重新发起两步随机接入；或者
重新发起四步随机接入。
在一个实施例中，所述处理器被配置为：
在两步随机接入专用的物理随机接入信道PRACH资源重新发起两步随机接 入。
在一个实施例中，所述处理器被配置为：
在第一类型终端专用的PRACH资源重新发起四步随机接入。
在一个实施例中，所述处理器还被配置为：
根据所述基站的指示确定是否在接收到fallback RAR的情况下重新发起随机接入。
在一个实施例中，所述处理器还被配置为：
响应于确定在接收到fallback RAR的情况下不重新发起随机接入，根据所述fallback RAR向所述基站发送随机接入消息Msg3。
在一个实施例中，所述基站的指示包括显示指示或隐式指示。
在一个实施例中，所述基站的指示通过所述fallback RAR或广播信息实现。
在一个实施例中，所述处理器被配置为：
响应于所述RAR为回退随机接入响应fallback RAR，确定是否被配置了预设配置；
响应于被配置了预设配置，重新发起随机接入。
在一个实施例中，所述处理器还被配置为：
响应于未被配置预设配置，向所述基站发送Msg3。
在一个实施例中，所述预设配置包括以下至少之一：
所述第一类型终端被配置的初始上行带宽部分Initial UL BWP，与第二类型终端被配置的Initial UL BWP不同；
所述第一类型终端被配置的Initial UL BWP，与第二类型终端被配置的Initial UL BWP共享PRACH资源；
第二类型终端被配置的Initial UL BWP，大于所述第一类型终端支持的最大带宽；
所述第一类型终端在Msg3中携带终端类型指示信息的机制被无效；
所述第一类型终端基于时隙内跳频方案传输Msg3，且时隙内跳频方案中的跳 频幅度大于所述第一类型终端支持的最大带宽。
在一个实施例中，所述第一类型终端包括非能力降低RedCap终端，所述第二类型终端包括RedCap终端。
本公开的实施例提出一种随机接入装置，所述装置可以适用于基站，所述基站可以与终端进行通信，例如与第一类型终端通信，第一类型终端例如包括降低能力RedCap终端，所述终端包括但不限于手机、平板电脑、可穿戴设备、传感器、物联网设备等通信装置，所述基站包括但不限于4G基站、5G基站、6G基站等通信系统中的基站。
在一个实施例中，所述装置包括一个或多个处理器，所述处理器被配置为：
接收第一类型终端发送的MsgA；
响应于未正确解调所述MsgA中的PUSCH，向所述终端发送fallback RAR；
接收终端重新发起的随机接入。
在一个实施例中，所述处理器还被配置为：
向终端指示是否在接收到fallback RAR的情况下重新发起随机接入。
在一个实施例中，所述处理器被配置为：
响应于向终端指示在接收到fallback RAR的情况下不重新发起随机接入，接收所述终端根据所述fallback RAR发送的Msg3。
在一个实施例中，所述处理器还被配置为：
响应于为所述终端配置了预设配置，禁止所述第一类型终端在MsgA的PUSCH中携带终端类型指示信息。
在一个实施例中，所述预设配置包括以下至少之一：
所述第一类型终端被配置的Initial UL BWP，与第二类型终端被配置的Initial UL BWP不同；
所述第一类型终端被配置的Initial UL BWP，与第二类型终端被配置的Initial UL BWP共享PRACH资源；
第二类型终端被配置的Initial UL BWP，大于所述第一类型终端支持的最大带宽；
所述第一类型终端在Msg3中携带终端类型指示信息的机制被无效；
所述第一类型终端基于时隙内跳频方案传输Msg3，且时隙内跳频方案中的跳频幅度大于所述第一类型终端支持的最大带宽。
在一个实施例中，所述第一类型终端包括非能力降低RedCap终端，所述第二类型终端包括RedCap终端。
关于上述实施例中的装置，其中各个模块执行操作的具体方式已经在相关方法的实施例中进行了详细描述，此处将不做详细阐述说明。
对于装置实施例而言，由于其基本对应于方法实施例，所以相关之处参见方法实施例的部分说明即可。以上所描述的装置实施例仅仅是示意性的，其中所述作为分离部件说明的模块可以是或者也可以不是物理上分开的，作为模块显示的部件可以是或者也可以不是物理模块，即可以位于一个地方，或者也可以分布到多个网络模块上。可以根据实际的需要选择其中的部分或者全部模块来实现本实施例方案的目的。本领域普通技术人员在不付出创造性劳动的情况下，即可以理解并实施。
本公开的实施例还提出一种通信装置，包括：处理器；用于存储计算机程序的存储器；其中，当所述计算机程序被处理器执行时，实现上述任一实施例所述的适用于第一类型终端的随机接入方法。
本公开的实施例还提出一种通信装置，包括：处理器；用于存储计算机程序的存储器；其中，当所述计算机程序被处理器执行时，实现上述任一实施例所述的适用于基站的随机接入方法。
本公开的实施例还提出一种计算机可读存储介质，用于存储计算机程序，当所述计算机程序被处理器执行时，实现权上述任一实施例所述的适用于第一类型终端的随机接入方法中的步骤。
本公开的实施例还提出一种计算机可读存储介质，用于存储计算机程序，当所述计算机程序被处理器执行时，实现上述任一实施例所述的适用于基站的随机接入方法中的步骤。
如图7所示，图7是根据本公开的实施例示出的一种用于随机接入的装置700的示意框图。装置700可以被提供为一基站。参照图7，装置700包括处理组件722、无线发射/接收组件724、天线组件726、以及无线接口特有的信号处理部分，处理组件722可进一步包括一个或多个处理器。处理组件722中的其中一个处理器可以被配 置为实现上述任一实施例所述的适用于基站的随机接入方法。
图8是根据本公开的实施例示出的一种用于随机接入的装置800的示意框图。例如，装置800可以是移动电话，计算机，数字广播终端，消息收发设备，游戏控制台，平板设备，医疗设备，健身设备，个人数字助理等。
参照图8，装置800可以包括以下一个或多个组件：处理组件802，存储器804，电源组件806，多媒体组件808，音频组件810，输入/输出(I/O)的接口812，传感器组件814，以及通信组件816。
处理组件802通常控制装置800的整体操作，诸如与显示，电话呼叫，数据通信，相机操作和记录操作相关联的操作。处理组件802可以包括一个或多个处理器820来执行指令，以完成上述任一实施例所述的适用于第一类型终端的随机接入方法的全部或部分步骤。此外，处理组件802可以包括一个或多个模块，便于处理组件802和其他组件之间的交互。例如，处理组件802可以包括多媒体模块，以方便多媒体组件808和处理组件802之间的交互。
存储器804被配置为存储各种类型的数据以支持在装置800的操作。这些数据的示例包括用于在装置800上操作的任何应用程序或方法的指令，联系人数据，电话簿数据，消息，图片，视频等。存储器804可以由任何类型的易失性或非易失性存储设备或者它们的组合实现，如静态随机存取存储器(SRAM)，电可擦除可编程只读存储器(EEPROM)，可擦除可编程只读存储器(EPROM)，可编程只读存储器(PROM)，只读存储器(ROM)，磁存储器，快闪存储器，磁盘或光盘。
电源组件806为装置800的各种组件提供电力。电源组件806可以包括电源管理系统，一个或多个电源，及其他与为装置800生成、管理和分配电力相关联的组件。
多媒体组件808包括在所述装置800和用户之间的提供一个输出接口的屏幕。在一些实施例中，屏幕可以包括液晶显示器(LCD)和触摸面板(TP)。如果屏幕包括触摸面板，屏幕可以被实现为触摸屏，以接收来自用户的输入信号。触摸面板包括一个或多个触摸传感器以感测触摸、滑动和触摸面板上的手势。所述触摸传感器可以不仅感测触摸或滑动动作的边界，而且还检测与所述触摸或滑动操作相关的持续时间和压力。在一些实施例中，多媒体组件808包括一个前置摄像头和/或后置摄像头。当装置800处于操作模式，如拍摄模式或视频模式时，前置摄像头和/或后置摄像头可以接收外部的多媒体数据。每个前置摄像头和后置摄像头可以是一个固定的光学透镜系 统或具有焦距和光学变焦能力。
音频组件810被配置为输出和/或输入音频信号。例如，音频组件810包括一个麦克风(MIC)，当装置800处于操作模式，如呼叫模式、记录模式和语音识别模式时，麦克风被配置为接收外部音频信号。所接收的音频信号可以被进一步存储在存储器804或经由通信组件816发送。在一些实施例中，音频组件810还包括一个扬声器，用于输出音频信号。
I/O接口812为处理组件802和外围接口模块之间提供接口，上述外围接口模块可以是键盘，点击轮，按钮等。这些按钮可包括但不限于：主页按钮、音量按钮、启动按钮和锁定按钮。
传感器组件814包括一个或多个传感器，用于为装置800提供各个方面的状态评估。例如，传感器组件814可以检测到装置800的打开/关闭状态，组件的相对定位，例如所述组件为装置800的显示器和小键盘，传感器组件814还可以检测装置800或装置800一个组件的位置改变，用户与装置800接触的存在不存在，装置800方位或加速/减速和装置800的温度变化。传感器组件814可以包括接近传感器，被配置用来在没有任何的物理接触时检测附近物体的存在。传感器组件814还可以包括光传感器，如CMOS或CCD图像传感器，用于在成像应用中使用。在一些实施例中，该传感器组件814还可以包括加速度传感器，陀螺仪传感器，磁传感器，压力传感器或温度传感器。
通信组件816被配置为便于装置800和其他设备之间有线或无线方式的通信。装置800可以接入基于通信标准的无线网络，如WiFi，2G或3G，4G LTE、5G NR或它们的组合。在一个示例性实施例中，通信组件816经由广播信道接收来自外部广播管理系统的广播信号或广播相关信息。在一个示例性实施例中，所述通信组件816还包括近场通信(NFC)模块，以促进短程通信。例如，在NFC模块可基于射频识别(RFID)技术，红外数据协会(IrDA)技术，超宽带(UWB)技术，蓝牙(BT)技术和其他技术来实现。
在示例性实施例中，装置800可以被一个或多个应用专用集成电路(ASIC)、数字信号处理器(DSP)、数字信号处理设备(DSPD)、可编程逻辑器件(PLD)、现场可编程门阵列(FPGA)、控制器、微控制器、微处理器或其他电子元件实现，用于执行上述任一实施例所述的适用于第一类型终端的随机接入方法。
在示例性实施例中，还提供了一种包括指令的非临时性计算机可读存储介质，例如包括指令的存储器804，上述指令可由装置800的处理器820执行以完成上述任一实施例所述的适用于第一类型终端的随机接入方法。例如，所述非临时性计算机可读存储介质可以是ROM、随机存取存储器(RAM)、CD-ROM、磁带、软盘和光数据存储设备等。
本领域技术人员在考虑说明书及实践这里公开的公开后，将容易想到本公开的其它实施方案。本公开旨在涵盖本公开的任何变型、用途或者适应性变化，这些变型、用途或者适应性变化遵循本公开的一般性原理并包括本公开未公开的本技术领域中的公知常识或惯用技术手段。说明书和实施例仅被视为示例性的，本公开的真正范围和精神由下面的权利要求指出。
应当理解的是，本公开并不局限于上面已经描述并在附图中示出的精确结构，并且可以在不脱离其范围进行各种修改和改变。本公开的范围仅由所附的权利要求来限制。
需要说明的是，在本文中，诸如第一和第二等之类的关系术语仅仅用来将一个实体或者操作与另一个实体或操作区分开来，而不一定要求或者暗示这些实体或操作之间存在任何这种实际的关系或者顺序。术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者设备所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括所述要素的过程、方法、物品或者设备中还存在另外的相同要素。
以上对本公开实施例所提供的方法和装置进行了详细介绍，本文中应用了具体个例对本公开的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本公开的方法及其核心思想；同时，对于本领域的一般技术人员，依据本公开的思想，在具体实施方式及应用范围上均会有改变之处，综上所述，本说明书内容不应理解为对本公开的限制。

Claims (24)

  1. 一种随机接入方法，其特征在于，适用于第一类型终端，所第一类型终端被配置了在随机接入消息MsgA的物理上行共享信道PUSCH中携带终端类型指示信息，所述方法包括：
    向基站发送MsgA；
    接收所述基站发送的随机接入响应RAR；
    响应于所述RAR为回退随机接入响应fallback RAR，重新发起随机接入或根据基站的指示发送Msg3。
  2. 根据权利要求1所述的方法，其特征在于，所述重新发起随机接入包括：
    重新发起两步随机接入；或者
    重新发起四步随机接入。
  3. 根据权利要求1所述的方法，其特征在于，所述重新发起两步随机接入包括：
    在两步随机接入专用的物理随机接入信道PRACH资源重新发起两步随机接入。
  4. 根据权利要求1所述的方法，其特征在于，所述重新发起四步随机接入包括：
    在第一类型终端专用的PRACH资源重新发起四步随机接入。
  5. 根据权利要求1至4中任一项所述的方法，其特征在于，在或根据基站的指示发送Msg3之前，所述方法还包括：
    根据所述基站的指示确定是否在接收到fallback RAR的情况下重新发起随机接入。
  6. 根据权利要求5所述的方法，其特征在于，所述方法还包括：
    响应于确定在接收到fallback RAR的情况下不重新发起随机接入，根据所述fallback RAR向所述基站发送随机接入消息Msg3。
  7. 根据权利要求5所述的方法，其特征在于，所述基站的指示包括显示指示或隐式指示。
  8. 根据权利要求5所述的方法，其特征在于，所述基站的指示通过所述fallback RAR或广播信息实现。
  9. 根据权利要求1至4中任一项所述的方法，其特征在于，所述响应于所述RAR为回退随机接入响应fallback RAR，重新发起随机接入包括：
    响应于所述RAR为回退随机接入响应fallback RAR，确定是否被配置了预设配置；
    响应于被配置了预设配置，重新发起随机接入。
  10. 根据权利要求9所述的方法，其特征在于，所述方法还包括：
    响应于未被配置预设配置，向所述基站发送Msg3。
  11. 根据权利要求9所述的方法，其特征在于，所述预设配置包括以下至少之一：
    所述第一类型终端被配置的初始上行带宽部分Initial UL BWP，与第二类型终端被配置的Initial UL BWP不同；
    所述第一类型终端被配置的Initial UL BWP，与第二类型终端被配置的Initial UL BWP共享PRACH资源；
    第二类型终端被配置的Initial UL BWP，大于所述第一类型终端支持的最大带宽；
    所述第一类型终端在Msg3中携带终端类型指示信息的机制被无效；
    所述第一类型终端基于时隙内跳频方案传输Msg3，且时隙内跳频方案中的跳频幅度大于所述第一类型终端支持的最大带宽。
  12. 根据权利要求11所述的方法，其特征在于，所述第一类型终端包括非能力降低RedCap终端，所述第二类型终端包括RedCap终端。
  13. 一种随机接入方法，其特征在于，适用于基站，所述方法包括：
    接收第一类型终端发送的MsgA；
    向所述终端发送随机接入响应RAR，其中所述RAR为回退随机接入响应fallback RAR；
    接收终端重新发起的随机接入或接收终端发送的Msg3。
  14. 根据权利要求13所述的方法，其特征在于，所述方法还包括：
    向终端指示是否在接收到fallback RAR的情况下重新发起随机接入。
  15. 根据权利要求13所述的方法，其特征在于，所述接收终端发送的Msg3包括：
    响应于确定所述终端在接收到fallback RAR的情况下不重新发起随机接入，接收所述终端根据所述fallback RAR发送的Msg3。
  16. 根据权利要求13至15中任一项所述的方法，其特征在于，所述方法还包括：
    响应于确定所述终端配置了预设配置，禁止所述第一类型终端在MsgA的PUSCH中携带终端类型指示信息。
  17. 根据权利要求16所述的方法，其特征在于，所述预设配置包括以下至少之一：
    所述第一类型终端被配置的Initial UL BWP，与第二类型终端被配置的Initial UL BWP不同；
    所述第一类型终端被配置的Initial UL BWP，与第二类型终端被配置的Initial UL BWP共享PRACH资源；
    第二类型终端被配置的Initial UL BWP，大于所述第一类型终端支持的最大带宽；
    所述第一类型终端在Msg3中携带终端类型指示信息的机制被无效；
    所述第一类型终端基于时隙内跳频方案传输Msg3，且时隙内跳频方案中的跳频幅度大于所述第一类型终端支持的最大带宽。
  18. 根据权利要求17所述的方法，其特征在于，所述第一类型终端包括非能力降低RedCap终端，所述第二类型终端包括RedCap终端。
  19. 一种随机接入装置，其特征在于，适用于第一类型终端，所第一类型终端被配置了在随机接入消息MsgA的物理上行共享信道PUSCH中携带终端类型指示信息，所述装置包括一个或多个处理器，所述处理器被配置为：
    向基站发送MsgA；
    接收所述基站发送的随机接入响应RAR；
    响应于所述RAR为回退随机接入响应fallback RAR，重新发起随机接入或根据基站的指示发送Msg3。
  20. 一种随机接入装置，其特征在于，适用于基站，所述装置包括一个或多个处理器，所述处理器被配置为：
    接收第一类型终端发送的MsgA；
    向所述终端发送随机接入响应RAR，其中所述RAR为回退随机接入响应fallback RAR；
    接收终端重新发起的随机接入或接收终端发送的Msg3。
  21. 一种通信装置，其特征在于，包括：
    处理器；
    用于存储计算机程序的存储器；
    其中，当所述计算机程序被处理器执行时，实现权利要求1至12中任一项所述的随机接入方法。
  22. 一种通信装置，其特征在于，包括：
    处理器；
    用于存储计算机程序的存储器；
    其中，当所述计算机程序被处理器执行时，实现权利要求12至18中任一项所述的随机接入方法。
  23. 一种计算机可读存储介质，用于存储计算机程序，其特征在于，当所述计算机程序被处理器执行时，实现权利要求1至12中任一项所述的随机接入方法中的步骤。
  24. 一种计算机可读存储介质，用于存储计算机程序，其特征在于，当所述计算 机程序被处理器执行时，实现权利要求12至18中任一项所述的随机接入方法中的步骤。
PCT/CN2021/127997 2021-11-01 2021-11-01 随机接入方法、装置、通信装置和计算机可读存储介质 Ceased WO2023070679A1 (zh)

Priority Applications (4)

Application Number Priority Date Filing Date Title
PCT/CN2021/127997 WO2023070679A1 (zh) 2021-11-01 2021-11-01 随机接入方法、装置、通信装置和计算机可读存储介质
CN202180003475.4A CN114175839B (zh) 2021-11-01 2021-11-01 随机接入方法、装置、通信装置和计算机可读存储介质
EP21962029.1A EP4429386A4 (en) 2021-11-01 2021-11-01 RANDOM ACCESS METHOD AND APPARATUS, COMMUNICATION APPARATUS, AND COMPUTER-READABLE STORAGE MEDIUM
CN202410295500.6A CN118075912B (zh) 2021-11-01 2021-11-01 随机接入方法、装置、通信装置和计算机可读存储介质

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2021/127997 WO2023070679A1 (zh) 2021-11-01 2021-11-01 随机接入方法、装置、通信装置和计算机可读存储介质

Publications (1)

Publication Number Publication Date
WO2023070679A1 true WO2023070679A1 (zh) 2023-05-04

Family

ID=80489963

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2021/127997 Ceased WO2023070679A1 (zh) 2021-11-01 2021-11-01 随机接入方法、装置、通信装置和计算机可读存储介质

Country Status (3)

Country Link
EP (1) EP4429386A4 (zh)
CN (2) CN114175839B (zh)
WO (1) WO2023070679A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117082621A (zh) * 2023-08-30 2023-11-17 中国移动紫金(江苏)创新研究院有限公司 控制信道资源分配方法、装置、基站和存储介质

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN120786658A (zh) * 2024-04-03 2025-10-14 大唐移动通信设备有限公司 信道发送方法、接收方法、装置、设备及网元

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108633106A (zh) * 2017-03-24 2018-10-09 电信科学技术研究院 一种随机接入回退后的随机接入及指示方法、装置
CN111800856A (zh) * 2019-07-05 2020-10-20 维沃移动通信有限公司 数据传输方法、寻呼方法、终端、基站及核心网设备
CN112673705A (zh) * 2020-12-11 2021-04-16 北京小米移动软件有限公司 信息传输方法、装置、通信设备和存储介质
CN113330813A (zh) * 2019-01-30 2021-08-31 高通股份有限公司 基于两步和四步随机接入信道过程的随机接入过程
WO2021181001A1 (en) * 2020-03-12 2021-09-16 Nokia Technologies Oy Enabling access for a reduced capability new radio (nr) device
CN113423145A (zh) * 2021-08-23 2021-09-21 深圳传音控股股份有限公司 处理方法、通信设备及存储介质

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3668251B1 (en) * 2017-08-09 2022-12-28 LG Electronics Inc. Method for performing random access process and device therefor
EP3462795B1 (en) * 2017-10-02 2024-03-20 Apple Inc. Mobile communication system, user equipment, access node, transceiver, baseband circuitry, apparatus, method, and machine readable media and computer programs for processing baseband signals
WO2020198912A1 (zh) * 2019-03-29 2020-10-08 北京小米移动软件有限公司 随机接入方法、装置及计算机可读存储介质
JP2020036343A (ja) * 2019-10-25 2020-03-05 ホアウェイ・テクノロジーズ・カンパニー・リミテッド 情報伝送方法、基地局、およびユーザ機器
CN114731700A (zh) * 2019-11-28 2022-07-08 高通股份有限公司 Nr-轻型随机接入响应重复
CN113395734A (zh) * 2020-03-13 2021-09-14 华为技术有限公司 一种通信方法及装置
US11683840B2 (en) * 2020-04-15 2023-06-20 Qualcomm Incorporated Techniques for user equipment (UE) procedures for random access channel (RACH) type selection and random access response (RAR) monitoring in a wireless communication system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108633106A (zh) * 2017-03-24 2018-10-09 电信科学技术研究院 一种随机接入回退后的随机接入及指示方法、装置
CN113330813A (zh) * 2019-01-30 2021-08-31 高通股份有限公司 基于两步和四步随机接入信道过程的随机接入过程
CN111800856A (zh) * 2019-07-05 2020-10-20 维沃移动通信有限公司 数据传输方法、寻呼方法、终端、基站及核心网设备
WO2021181001A1 (en) * 2020-03-12 2021-09-16 Nokia Technologies Oy Enabling access for a reduced capability new radio (nr) device
CN112673705A (zh) * 2020-12-11 2021-04-16 北京小米移动软件有限公司 信息传输方法、装置、通信设备和存储介质
CN113423145A (zh) * 2021-08-23 2021-09-21 深圳传音控股股份有限公司 处理方法、通信设备及存储介质

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP4429386A4 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117082621A (zh) * 2023-08-30 2023-11-17 中国移动紫金(江苏)创新研究院有限公司 控制信道资源分配方法、装置、基站和存储介质

Also Published As

Publication number Publication date
CN114175839B (zh) 2024-04-12
EP4429386A1 (en) 2024-09-11
CN118075912A (zh) 2024-05-24
EP4429386A4 (en) 2025-01-01
CN114175839A (zh) 2022-03-11
CN118075912B (zh) 2025-01-28

Similar Documents

Publication Publication Date Title
JP7705553B2 (ja) Ｂｗｐ切り替え方法、装置および記憶媒体
WO2023097525A1 (zh) 工作模式指示、确定方法和装置、通信装置和存储介质
WO2023070680A1 (zh) 资源配置、确定方法和装置、通信装置和存储介质
EP3869837A1 (en) Method and apparatus for transmitting random access indication information
US11516832B2 (en) Method and device for transmitting data in unlicensed cell, base station and user equipment
EP4207890A1 (en) Response indication method and device, and response determination method and device
US20210314992A1 (en) Method and apparatus for sending uplink scheduling request, device and storage medium
CN113455052B (zh) 随机接入方法和装置、通信装置和计算机可读存储介质
WO2021012279A1 (zh) 随机接入方法、装置及存储介质
EP3840496B1 (en) Bandwidth part adjustment method and bandwidth part adjustment apparatus
WO2023070672A1 (zh) 随机接入方法、装置及存储介质
WO2023019592A1 (zh) 配置信息发送、获取方法和装置、通信装置和存储介质
WO2022052007A1 (zh) 问题上报方法和问题上报装置
WO2023070679A1 (zh) 随机接入方法、装置、通信装置和计算机可读存储介质
CN110495242A (zh) 检测非授权频段的方法和检测非授权频段的装置
EP3751892A1 (en) Trigger hold method and trigger hold apparatus
US12342382B2 (en) Method and apparatus for processing random access
WO2024031690A1 (zh) 随机接入方法及装置、存储介质
WO2022155935A9 (zh) 请求信息发送方法和装置、请求信息接收方法和装置
US12563593B2 (en) Configuration determination method and device, and configuration indication method and device
US20260129626A1 (en) Resource configuration method and device, resource determination method and device, communication device, and storage medium
EP4447598A1 (en) Method and apparatus for determining random access occasion resource information, and method and apparatus for indicating random access occasion resource information
WO2024092802A1 (zh) 随机接入方法及装置、存储介质
WO2022151140A1 (zh) 信道接入方法及装置、存储介质
CN116615942A (zh) 一种确定信道接入方式的方法、装置及可读存储介质

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 21962029

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 18705845

Country of ref document: US

WWE Wipo information: entry into national phase

Ref document number: 202447039949

Country of ref document: IN

WWE Wipo information: entry into national phase

Ref document number: 2021962029

Country of ref document: EP

NENP Non-entry into the national phase

Ref country code: DE

ENP Entry into the national phase

Ref document number: 2021962029

Country of ref document: EP

Effective date: 20240603