Random access method, device, communication device and computer readable storage medium

Abstract

The present disclosure relates to a random access method, including: sending MsgA to a base station; receiving a random access response RAR sent by the base station; in response to the RAR being a fallback random access response fallback RAR, re-initiating random access or sending Msg3 according to the instruction of the base station. According to the present disclosure, after sending MsgA to the base station, if the RedCap terminal receives the RAR sent by the base station and determines that the received RAR is a fallback RAR, the random access can be directly re-initiated, or Msg3 can be sent according to the instruction of 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 on the second Initial UL BWP, the resources configured for the terminal to send Msg3 may be inappropriate. Therefore, the terminal can avoid communication problems caused by sending Msg3 on inappropriate resources by directly re-initiating random access, such as avoiding resource conflicts.

Description

[0001] Divisional Application Instructions

[0002] This application is a divisional application based on the Chinese patent invention application with application number 202180003475.4, application date November 1, 2021, and invention name "Random access method, device, communication device and computer-readable storage medium". Technical Field

[0003] The present disclosure relates to the field of communication technology, and in particular to a random access method, a random access device, a communication device, and a computer-readable storage medium. Background Art

[0004] With the development of communication technology, in order to adapt to new communication scenarios, a reduced capability (RedCap) terminal, referred to as a RedCap terminal, also known as NR-lite, has been proposed. This type of terminal generally needs to meet the conditions of low cost, low complexity, a certain degree of enhanced coverage, power saving, etc.

[0005] Since there are certain differences between RedCap terminals and non-RedCap terminals, when accessing the network, in order to enable the network to determine the type of the access terminal, the RedCap terminal can carry information indicating its own type when initiating random access. For example, when initiating two-step random access, the physical uplink shared channel (Physical Uplink Shared Channel, PUSCH) in the random access message MsgA can be used for early indication to indicate whether the terminal initiating the random access is a RedCap terminal.

[0006] If the base station does not correctly demodulate the PUSCH in MsgA, it can send a fallback random access response (Random Access Response) to the terminal, which carries configuration information, so that the terminal can send 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 is the same or similar to the PUSCH in MsgA. However, in some scenarios, the base station cannot determine how to configure the terminal to send Msg3. Summary of the invention

[0007] In view of this, the embodiments of the present disclosure propose a random access method, a random access device, a communication device, and a computer-readable storage medium to solve the technical problems in the related art.

[0008] According to a first aspect of an embodiment of the present disclosure, a random access method is proposed, which is applicable to a first type of terminal, and the first type of terminal is configured to carry terminal type indication information in a physical uplink shared channel PUSCH of a random access message MsgA. The method comprises: sending MsgA to a base station; receiving a random access response RAR sent by the base station; in response to the RAR being a fallback random access response fallback RAR, re-initiating random access or sending Msg3 according to the instruction of the base station.

[0009] According to the second aspect of an embodiment of the present disclosure, a random access method is proposed, which is applicable to a base station, and the method includes: receiving MsgA sent by a first type of terminal; sending a random access response RAR to the terminal, wherein the RAR is a fallback random access response fallback RAR; and receiving a random access re-initiated by the terminal or receiving Msg3 sent by the terminal.

[0010] According to a third aspect of an embodiment of the present disclosure, a random access device is proposed, which is applicable to a first type of terminal, and the first type of terminal is configured to carry terminal type indication information in a physical uplink shared channel PUSCH of a random access message MsgA. The device includes one or more processors, and the processors are configured to: send MsgA to a base station; receive a random access response RAR sent by the base station; 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.

[0011] According to a fourth aspect of an embodiment of the present disclosure, a random access device is proposed, which is applicable to a base station, and the device includes one or more processors, and the processors are configured to: receive MsgA sent by a first type of terminal; send a random access response RAR to the terminal, wherein the RAR is a fallback random access response fallback RAR; receive a random access re-initiated by the terminal or receive Msg3 sent by the terminal.

[0012] According to a fifth aspect of an embodiment of the present disclosure, a communication device is proposed, comprising: a processor; a memory for storing a computer program; wherein, when the computer program is executed by the processor, the random access method applicable to a first type of terminal as described in any of the above embodiments is implemented.

[0013] According to a sixth aspect of an embodiment of the present disclosure, a communication device is proposed, comprising: a processor; a memory for storing a computer program; wherein, when the computer program is executed by the processor, the random access method applicable to a base station described in any of the above embodiments is implemented.

[0014] According to a seventh aspect of an embodiment of the present disclosure, a computer-readable storage medium is proposed for storing a computer program. When the computer program is executed by a processor, the steps in the random access method applicable to a first type of terminal described in any one of the above embodiments are implemented.

[0015] According to an eighth aspect of an embodiment of the present disclosure, a computer-readable storage medium is proposed for storing a computer program. When the computer program is executed by a processor, the steps in the random access method applicable to a base station described in any of the above embodiments are implemented.

[0016] According to an embodiment of the present disclosure, after the RedCap terminal sends MsgA to the base station, if it receives a RAR sent by the base station and determines that the received RAR is a fallback RAR, in one embodiment, random access can be directly re-initiated, and in another embodiment, Msg3 can be sent according to the instruction of the base station.

[0017] 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 the second Initial UL BWP, the resources configured for the terminal to send Msg3 may be inappropriate. Therefore, the terminal can avoid communication problems caused by sending Msg3 on inappropriate resources by directly re-initiating random access, such as avoiding resource conflicts. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 It is a schematic flow chart of a random access method according to an embodiment of the present disclosure.

[0020] Figure 2 It is a schematic flow chart of another random access method according to an embodiment of the present disclosure.

[0021] Figure 3 It is a schematic flow chart of another random access method according to an embodiment of the present disclosure.

[0022] Figure 4 It is a schematic flow chart of a random access method according to an embodiment of the present disclosure.

[0023] Figure 5It is a schematic flow chart of another random access method according to an embodiment of the present disclosure.

[0024] Figure 6 It is a schematic flow chart of another random access method according to an embodiment of the present disclosure.

[0025] Figure 7 It is a schematic block diagram of a device for random access according to an embodiment of the present disclosure.

[0026] Figure 8 It is a schematic block diagram of a device for random access according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present disclosure.

[0028] The terms used in the disclosed embodiments are only for the purpose of describing specific embodiments and are not intended to limit the disclosed embodiments. The singular forms of "a", "an" and "the" used in the disclosed embodiments and the appended claims are also intended to include plural forms unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0029] It should be understood that although the terms first, second, third, etc. may be used to describe various information in the disclosed embodiments, these information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the disclosed embodiments, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".

[0030] For the purpose of brevity and ease of understanding, the terms used herein to characterize size relationships are "greater than" or "less than", "higher than" or "lower than". However, those skilled in the art can understand 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", and "lower than" also covers the meaning of "lower than or equal to".

[0031] Figure 1It is a schematic flow chart of a random access method shown in an embodiment of the present disclosure. The random access method shown in this embodiment can be applicable to a first type of terminal, and 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 of terminal can communicate with a base station, and the terminal includes but is not limited to a mobile phone, a tablet computer, a wearable device, a sensor, an Internet of Things device and other communication devices, and the base station includes but is not limited to a base station in a communication system such as a 4G base station, a 5G base station, and a 6G base station.

[0032] like Figure 1 As shown, the random access method initiation may include the following steps:

[0033] In step S101, a random access message MsgA is sent to a base station;

[0034] In step S102, a random access response RAR sent by the base station is received;

[0035] In step S103, in response to the RAR being a fallback random access response, random access is re-initiated or Msg3 is sent according to the instruction of the base station.

[0036] In one embodiment, the terminal may initiate random access to the base station to access the base station, for example, initiate two-step random access or four-step random access.

[0037] In the four-step random access process, 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 (PRACH) preamble;

[0038] After detecting the preamble, the base station sends a random access response RAR to the terminal, which may also be referred to as the second message Msg2. The RAR may carry the identification ID of the detected preamble, a timing advance-related command, a temporary C-RNTI (Cell-RadioNetworkTemporaryIdentifier, cell radio network temporary identifier) ​​also referred to as TC-RNTI, and may also carry resource allocation information, which is used to indicate the resources for the terminal to send the random access message Msg3;

[0039] After receiving the RAR, the terminal may send a third message Msg3 to the base station. Msg3 is mainly PUSCH, and the specific content carried therein is not fixed and depends on the actual scenario.

[0040] After receiving Msg3, the base station uses the contention resolution identifier ID to send a contention resolution message to the terminal, which may be referred to as a fourth message Msg4;

[0041] After receiving Msg4, the terminal obtains the contention resolution identifier ID therein, and then sends a confirmation message to the base station on the Physical Uplink Control Channel (PUCCH), completing the four-step random access process.

[0042] It can be seen that the four-step access process requires at least two round-trip communication cycles between the terminal and the base station, which will increase the latency 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.

[0043] In the two-step random access process, the terminal sends a random access message MsgA to the base station. MsgA consists of a PRACH preamble and a PUSCH, which is equivalent to Msg1 and Msg3 in the four-step random access process. It can be transmitted in the PRACH occasion (PO) where Msg1 is transmitted in the four-step random access process, or in an independent PO (for example, in a two-step random access dedicated PO);

[0044] 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.

[0045] It can be seen that the two-step random access process can reduce the interaction process between the base station and the terminal during the access process, which is beneficial to reducing the latency of the access process and saving signaling overhead. For example, when the terminal and the base station communicate in an unlicensed frequency band, since the two-step random access process requires fewer interactions, it is beneficial to reduce the number of Listen Before Talk (LBT) attempts in the unlicensed frequency band.

[0046] In the two-step random access process, after the terminal sends the random access message MsgA, the receiving base station sends a response message MsgB. There are three possible situations:

[0047] In case 1, the base station does not detect the PRACH preamble in MsgA, and thus does not send a response to the terminal, and does not send MsgB to the terminal. If the terminal does not receive MsgB after waiting, it can resend MsgA or fall back to the four-step random access process to send Msg1.

[0048] In case 2, the base station detects the PRACH preamble in MsgA, but fails to correctly decode the PUSCH in MsgA. In this case, a fallback RAR can be sent to the terminal. The fallback RAR carries at least resource allocation information, such as an uplink grant UL grant, which is used to indicate the resources for the terminal to transmit Msg3. After receiving the fallback RAR, the terminal can send Msg3 according to the indicated resources, which is equivalent to falling back to the four-step random access process.

[0049] In case three, the base station detects the PRACH preamble code in MsgA and correctly decodes the PUSCH in MsgA. It can return MsgB to the terminal, which can carry the successful random access response successRAR. The successRAR can carry the contention resolution identifier ID, C-RNTI, timing advance command, etc. The terminal receives MsgB and can determine that the two-step random access process is successfully completed.

[0050] In one embodiment, 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.

[0051] In one embodiment, the first type of terminal includes a reduced-capability RedCap terminal, and the second type of terminal includes a non-RedCap terminal, which may also be referred to as a traditional terminal or a Non-RedCap terminal.

[0052] For RedCap terminals, in order to enable the network to determine the type of terminal as soon as possible, when initiating the two-step random access process, early indication can be performed through PUSCH in MsgA. The indication method can be an explicit indication or an implicit indication, which is used to indicate the type of terminal initiating random access, such as whether it is a RedCap terminal.

[0053] In addition, since there may be legacy terminals in the network, that is, non-RedCap terminals, and reduced-capability RedCap terminals, in order to avoid conflicts when initiating random access between terminals of different types, the base station may configure different initial uplink bandwidth parts (InitialUL BWP) (Bandwidth Part) for RedCap terminals and non-RedCap terminals, so that RedCap terminals and non-RedCap terminals can use different InitialUL BWPs to initiate random access, respectively.

[0054] For the convenience of description below, the Initial UL BWP configured for the RedCap terminal is called the first Initial UL BWP, and the Initial UL BWP configured for the non-RedCap terminal is called the second Initial UL BWP, and the first Initial ULBWP is different from the second Initial UL BWP. In all embodiments of the present disclosure, the first Initial UL BWP and the second Initial UL BWP are different, which can be exemplified by one or more of the following situations:

[0055] The first Initial UL BWP and the second Initial UL BWP have different bandwidths;

[0056] The first Initial UL BWP and the second Initial UL BWP have different starting positions and / or ending positions.

[0057] In some possible implementations, the first Initial UL BWP and the second Initial UL BWP may have overlapping parts, or the first Initial UL BWP and the second Initial UL BWP may not overlap at all, or the first Initial UL BWP is completely included in the second Initial UL BWP, or the second Initial UL BWP is completely included in the first Initial UL BWP.

[0058] In a possible implementation, 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 the non-RedCap terminal is called the second Initial UL BWP, which can be configured for both the RedCap terminal and the non-RedCap terminal.

[0059] In this case, for the second case of the above-mentioned two-step random access, the base station does not correctly demodulate the PUSCH in MsgA, and cannot correctly obtain the early indication, so it cannot determine the type of the terminal initiating the random access, which causes the base station to be unable to determine whether to configure the terminal to send Msg3 on the first Initial UL BWP or on the second Initial UL BWP.

[0060] According to an embodiment of the present disclosure, after the RedCap terminal sends MsgA to the base station, if it receives a RAR sent by the base station and determines that the received RAR is a fallback RAR, in one possible embodiment, it can directly re-initiate random access, and in another possible embodiment, it can send Msg3 according to the instruction of the base station.

[0061] 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 the second Initial UL BWP, the resources configured for the terminal to send Msg3 may be inappropriate. Therefore, the terminal can avoid communication problems caused by sending Msg3 on inappropriate resources by directly re-initiating random access, such as avoiding resource conflicts.

[0062] In addition, the base station may also instruct the terminal as needed to send Msg3 when receiving the fallbackRAR, for example, by indicating through the fallback RAR, or by indicating in advance through system information or other downlink signaling, or by determining according to the communication standard. Accordingly, it is possible to flexibly control whether the terminal sends Msg3 when receiving the fallbackRAR.

[0063] In one embodiment, the re-initiating random access includes:

[0064] Re-initiate two-step random access; or

[0065] Re-initiate four-step random access.

[0066] In one embodiment, 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.

[0067] In one embodiment, the re-initiating two-step random access includes:

[0068] The two-step random access is re-initiated on a physical random access channel PRACH resource dedicated to the two-step random access.

[0069] In one embodiment, the re-initiating four-step random access includes:

[0070] The four-step random access is re-initiated on the PRACH resources dedicated to the first type of terminals.

[0071] Figure 2 FIG. 1 is a schematic flow chart of another random access method according to an embodiment of the present disclosure. Figure 2 As shown, before sending Msg3 according to the instruction of the base station, the method further includes:

[0072] In step S201, it is determined whether to re-initiate random access when a fallback RAR is received according to an instruction of the base station.

[0073] In one embodiment, the method further comprises:

[0074] In step S202, in response to determining not to re-initiate random access when a fallback RAR is received, a random access message Msg3 is sent to the base station according to the fallback RAR.

[0075] In one embodiment, the base station may instruct the terminal as needed, indicating whether the terminal should re-initiate random access when receiving the fallback RAR. For example, the base station's instruction may be implemented through the fallback RAR or broadcast information, such as indicating through the fallback RAR, or indicating in advance through broadcast information (such as system information). The base station's instruction includes a display instruction or an implicit instruction, that is, the terminal may be instructed in a display manner or in an implicit manner.

[0076] The terminal can determine whether to re-initiate random access when receiving the fallback RAR according to the instruction of the base station, and when it is determined not to re-initiate random access, it can send Msg3 to the base station, and when it is determined to re-initiate random access, 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.

[0077] Figure 3 FIG. 1 is a schematic flow chart of another random access method according to an embodiment of the present disclosure. Figure 3 As shown, in response to the RAR being a fallback random access response fallback RAR, re-initiating random access includes:

[0078] In step S301, in response to the RAR being a fallback random access response fallback RAR, determining whether a preset configuration is configured;

[0079] In step S302, in response to determining that the terminal is configured with a preset configuration, random access is re-initiated.

[0080] In another embodiment, the method comprises:

[0081] In step S301, in response to the RAR being a fallback random access response fallback RAR, determining whether a preset configuration is configured;

[0082] In step S303, in response to not being configured with the preset configuration, Msg3 is sent to the base station.

[0083] In yet another embodiment, the method further comprises:

[0084] In step S301, in response to the RAR being a fallback random access response fallback RAR, determining whether a preset configuration is configured;

[0085] In step S302, in response to determining that the terminal is configured with a preset configuration, random access is re-initiated.

[0086] In step S301, in response to the RAR being a fallback random access response fallback RAR, determining whether a preset configuration is configured;

[0087] In step S303, in response to not being configured with the preset configuration, Msg3 is sent to the base station.

[0088] In one embodiment, in addition to the above-mentioned base station indication method, the base station may 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.

[0089] In the embodiments of the present disclosure, the preset configuration may be configured by the base station to the terminal, or determined by the terminal according to a communication protocol, or preset in the terminal.

[0090] In one embodiment, the preset configuration includes at least one of the following:

[0091] The initial uplink bandwidth part Initial UL BWP configured for the first type of terminal is different from the Initial UL BWP configured for the second type of terminal;

[0092] The Initial UL BWP configured for the first type of terminal shares PRACH resources with the Initial UL BWP configured for the second type of terminal;

[0093] The Initial UL BWP configured for the second type of terminal is greater than the maximum bandwidth supported by the first type of terminal;

[0094] The mechanism for the first type of terminal to carry the terminal type indication information in Msg3 is disabled;

[0095] The first type of terminal transmits Msg3 based on an intra-slot frequency hopping scheme, and the frequency hopping amplitude in the intra-slot frequency hopping scheme is greater than the maximum bandwidth supported by the first type of terminal.

[0096] In the above implementation manners, different preset configurations may be determined based on different methods, which will not be described in detail herein.

[0097] In one embodiment, when the first type terminal determines that the Initial ULBWP configured for the first type terminal is different from the Initial UL BWP configured for the second type terminal, this situation will make it difficult for the base station to accurately determine whether to configure the terminal to send Msg3 on the first Initial UL BWP or the second Initial UL BWP, which may result in the resources configured for the terminal to send Msg3 being inappropriate. Therefore, when a fallback RAR is received, Msg3 may not be sent based on the fallback RAR, but random access may be re-initiated to avoid communication problems caused by sending Msg3 on inappropriate resources, such as avoiding resource conflicts.

[0098] In one embodiment, when the first type terminal determines that the Initial UL BWP configured for the first type terminal shares PRACH resources with the Initial UL BWP configured for the second type terminal, it is difficult for the base station to distinguish the types of the two terminals based on the BWP at which the two terminals initiate random access. Therefore, it is difficult to accurately determine whether the terminal is configured to send Msg3 on the first Initial UL BWP or the second Initial UL BWP, which may result in inappropriate resources configured for the terminal to send Msg3. Therefore, when a fallback RAR is received, Msg3 may not be sent based on the fallback RAR, but random access may be re-initiated to avoid communication problems caused by sending Msg3 on inappropriate resources, such as avoiding resource conflicts.

[0099] It should be noted that even if the Initial UL BWP configured for the first type of terminal does not share PRACH resources with the Initial UL BWP configured for the second type of terminal, the base station may not be able to distinguish the types of the two terminals according to the BWP where the two terminals initiate random access.

[0100] In one embodiment, when the first type terminal determines that the Initial ULBWP configured for the second type terminal is greater than the maximum bandwidth (maximum UE BW) supported by the first type terminal, even if the base station configures the first type terminal to send Msg3 on the second Initial UL BWP through fallback RAR, since the second Initial ULBWP is greater than the maximum bandwidth supported by the first type terminal, the first type terminal cannot send Msg3 well on the second Initial ULBWP. Therefore, Msg3 may not be sent based on fallback RAR, but random access may be re-initiated to avoid problems in sending Msg3 on an unsupported bandwidth.

[0101] In one embodiment, when the first type terminal determines that the mechanism for the first type terminal to carry 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 random access process initiated subsequently, and therefore can re-initiate the random access process and carry the terminal type indication information to send to the base station.

[0102] In one embodiment, when the first type terminal determines that the first type terminal transmits Msg3 based on the intra-time slot frequency hopping scheme, and the frequency hopping amplitude in the intra-time slot frequency hopping scheme is greater than the maximum bandwidth supported by the first type terminal, even if the base station configures the first type terminal to transmit Msg3 based on the intra-time slot frequency hopping scheme through fallback RAR, since the frequency hopping amplitude in the configured intra-time slot frequency hopping scheme is greater than the maximum bandwidth supported by the first type terminal, the first type terminal cannot well support the frequency hopping transmission of this scheme. Therefore, Msg3 may not be sent based on fallback RAR, but random access may be re-initiated to avoid problems in sending Msg3 based on an unsupported frequency hopping scheme.

[0103] Figure 4 It is a schematic flow chart of a random access method according to an embodiment of the present disclosure. The random access method shown in this embodiment can be applicable to a base station, and the base station can communicate with a terminal, for example, with a first type of terminal, and the first type of terminal includes, for example, a reduced capability RedCap terminal, and the terminal includes but is not limited to a mobile phone, a tablet computer, a wearable device, a sensor, an Internet of Things device and other communication devices, and the base station includes but is not limited to a base station in a communication system such as a 4G base station, a 5G base station, and a 6G base station.

[0104] like Figure 4As shown, the random access method includes:

[0105] In step S401, MsgA sent by a first type of terminal is received;

[0106] In step S402, a random access response RAR is sent to the terminal, where the RAR is a fallback random access response fallback RAR;

[0107] In step S403, the random access re-initiated by the receiving terminal or the Msg3 sent by the receiving terminal.

[0108] In one possible implementation, 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, the base station sends a fallback RAR to the terminal in response to not demodulating the corresponding Preamble in the MsgA. This will be described in detail later.

[0109] In one implementation, in response to the terminal being configured with a preset configuration and receiving a fallback RAR, the terminal re-initiates random access. In another implementation, in response to the terminal not being configured with a preset configuration and receiving a fallback RAR, the terminal sends Msg3 to the base station.

[0110] That is, step 403 may be: receiving a random access re-initiated by the terminal; the random access is a random access re-initiated by the terminal when the terminal is configured with a preset configuration and receives a fallback RAR.

[0111] Alternatively, the step 403 may be: receiving Msg3 sent by the terminal; wherein the Msg3 is Msg3 sent by the terminal when the terminal is not configured with a preset configuration and receives a fallback RAR.

[0112] In one embodiment, the terminal may initiate random access to the base station to access the base station, for example, initiate two-step random access or four-step random access.

[0113] In the four-step random access process, the terminal first sends a random access message Msg1 to the terminal, which carries a physical random access channel (PRACH) preamble preamble;

[0114] After detecting the preamble, the base station sends a random access response RAR to the terminal, which may also be referred to as the second message Msg2. The RAR may carry the identification ID of the detected preamble, a timing advance-related command, a temporary C-RNTI (Cell-RadioNetworkTemporaryIdentifier, cell radio network temporary identifier) ​​also referred to as TC-RNTI, and may also carry resource allocation information, which is used to indicate the resources for the terminal to send the random access message Msg3;

[0115] 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 scenario;

[0116] After receiving Msg3, the base station uses the contention resolution identifier ID to send a contention resolution message to the terminal, which may be referred to as a fourth message Msg4;

[0117] After receiving Msg4, the terminal obtains the contention resolution identifier ID therein, and then sends a confirmation message to the base station on the Physical Uplink Control Channel (PUCCH), completing the four-step random access process.

[0118] It can be seen that the four-step access process requires at least two round-trip communication cycles between the terminal and the base station, which will increase the latency 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.

[0119] In the two-step random access process, the terminal sends a random access message MsgA to the base station. MsgA consists of a PRACH preamble and a PUSCH, which is equivalent to Msg1 and Msg3 in the four-step random access process. It can be transmitted in the PRACH occasion (PO) where Msg1 is transmitted in the four-step random access process, or in an independent PO (for example, in a two-step random access dedicated PO);

[0120] 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.

[0121] It can be seen that the two-step random access process can reduce the interaction process between the base station and the terminal during the access process, which is beneficial to reducing the latency of the access process and saving signaling overhead. For example, when the terminal and the base station communicate in an unlicensed frequency band, since the two-step random access process requires fewer interactions, it is beneficial to reduce the number of Listen Before Talk (LBT) attempts in the unlicensed frequency band.

[0122] In the two-step random access process, after the terminal sends MsgA, the receiving base station sends MsgB. There are three possible situations:

[0123] In case 1, the base station does not detect the PRACH preamble in MsgA, and thus does not send a response to the terminal, and does not send MsgB to the terminal. If the terminal does not receive MsgB after waiting, it can resend MsgA or fall back to the four-step random access process to send Msg1.

[0124] In case 2, the base station detects the PRACH preamble in MsgA, but fails to correctly decode the PUSCH in MsgA. In this case, a fallback RAR can be sent to the terminal. The fallback RAR carries at least resource allocation information, such as an uplink grant UL grant, which is used to indicate the resources for the terminal to transmit Msg3. After receiving the fallback RAR, the terminal can send Msg3 according to the indicated resources, which is equivalent to falling back to the four-step random access process.

[0125] In case three, the base station detects the PRACH preamble code in MsgA and correctly decodes the PUSCH in MsgA. It can return MsgB to the terminal, which can carry the successful random access response successRAR. The successRAR can carry the contention resolution identifier ID, C-RNTI, timing advance command, etc. The terminal receives MsgB and can determine that the two-step random access process is successfully completed.

[0126] In one embodiment, 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.

[0127] In one embodiment, the first type of terminal includes a reduced-capability RedCap terminal, and the second type of terminal includes a non-RedCap terminal, which may also be referred to as a traditional terminal or a Non-RedCap terminal.

[0128] For RedCap terminals, in order to enable the network to determine the type of terminal as quickly as possible, when initiating a two-step random access process, an early indication may be made through the PUSCH in MsgA. The indication method may be a display indication or an implicit indication, which is used to indicate the type of terminal initiating random access, such as whether it is a RedCap terminal. In all embodiments of the present disclosure, explicit indication may refer to indication through an explicit indicator / character field / bit or other explicit methods. In all embodiments of the present disclosure, implicit indication may refer to indication through coding or other methods.

[0129] In addition, since there may be traditional terminals in the network, that is, non-RedCap terminals with reduced capabilities, there may also be RedCap terminals with reduced capabilities, in order to avoid conflicts in initiating random access between terminals of different types, the base station may configure different initial uplink bandwidth parts (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.

[0130] For the convenience of description below, the Initial UL BWP configured by the base station for the RedCap terminal is called the first Initial UL BWP, and the Initial UL BWP configured for the non-RedCap terminal is called the second Initial UL BWP. The first Initial UL BWP and the second Initial UL BWP are different.

[0131] In this case, for the second case of the above-mentioned two-step random access, the base station does not correctly demodulate the PUSCH in MsgA, and cannot correctly obtain the early indication, so it cannot determine the type of the terminal initiating the random access, which causes the base station to be unable to determine whether to configure the terminal to send Msg3 on the first Initial UL BWP or on the second Initial UL BWP.

[0132] According to an embodiment of the present disclosure, after the RedCap terminal sends MsgA to the base station, if it receives a RAR sent by the base station and determines that the received RAR is a fallback RAR, in one embodiment, random access can be directly re-initiated, and in another embodiment, Msg3 can be sent according to the instruction of the base station.

[0133] 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 the second Initial UL BWP, the resources configured for the terminal to send Msg3 may be inappropriate. Therefore, the terminal can avoid communication problems caused by sending Msg3 on inappropriate resources by directly re-initiating random access, such as avoiding resource conflicts, and the base station can receive the random access re-initiated by the terminal.

[0134] In addition, the base station may also instruct the terminal as needed to instruct the terminal to send Msg3 when receiving fallback RAR, for example, by indicating through fallback RAR, or by indicating in advance through system information. Accordingly, it is possible to flexibly control whether the terminal sends Msg3 when receiving fallback RAR. In an embodiment of the present disclosure, the base station may instruct the terminal to send Msg3 when receiving fallback RAR as needed, for example, by indicating through fallback RAR, or by indicating in advance through system information or other downlink signaling, or by determining according to the communication standard. Accordingly, it is possible to flexibly control whether the terminal sends Msg3 when receiving fallback RAR.

[0135] Figure 5 FIG. 1 is a schematic flow chart of another random access method according to an embodiment of the present disclosure. Figure 5 As shown, the method also includes:

[0136] In step S501, the terminal is instructed whether to re-initiate random access when a fallback RAR is received.

[0137] In one embodiment, the Msg3 sent by the receiving terminal includes:

[0138] In step S502, in response to instructing the terminal not to re-initiate random access when a fallback RAR is received, Msg3 sent by the terminal according to the fallback RAR is received.

[0139] In one embodiment, the base station may instruct the terminal as needed, indicating whether the terminal should re-initiate random access when receiving the fallback RAR. For example, the base station's instruction may be implemented through the fallback RAR or broadcast information, such as indicating through the fallback RAR, or indicating in advance through broadcast information (such as system information). The base station's instruction includes a display instruction or an implicit instruction, that is, the terminal may be instructed in a display manner or in an implicit manner.

[0140] The terminal can determine whether to re-initiate random access in the case of receiving the fallback RAR according to the instruction of the base station, and can send Msg3 to the base station if it is determined not to re-initiate random access. Then the base station can receive Msg3 sent by the terminal according to the fallback RAR, and re-initiate two-step random access or four-step random access in the case of determining to re-initiate random access. Accordingly, the base station can flexibly control whether the terminal sends Msg3 in the case of receiving the fallback RAR.

[0141] Figure 6 FIG. 1 is a schematic flow chart of another random access method according to an embodiment of the present disclosure. Figure 6 As shown, the method also includes:

[0142] In step S601, in response to determining that the terminal is configured with a preset configuration, the first type of terminal is prohibited from carrying terminal type indication information in a PUSCH of MsgA.

[0143] In the embodiments of the present disclosure, the preset configuration may be configured by the base station to the terminal, or determined by the terminal according to a communication protocol, or preset in the terminal.

[0144] In one embodiment, the preset configuration includes at least one of the following:

[0145] The Initial UL BWP configured for the first type of terminal is different from the Initial UL BWP configured for the second type of terminal;

[0146] The Initial UL BWP configured for the first type of terminal shares PRACH resources with the Initial UL BWP configured for the second type of terminal;

[0147] The Initial UL BWP configured for the second type of terminal is greater than the maximum bandwidth supported by the first type of terminal;

[0148] The mechanism for the first type of terminal to carry terminal type indication information in Msg3 is invalid;

[0149] The first type of terminal transmits Msg3 based on an intra-time slot frequency hopping scheme, and a frequency hopping amplitude in the intra-time slot frequency hopping scheme is greater than a maximum bandwidth supported by the first type of terminal.

[0150] In the above implementation manners, different preset configurations may be determined based on different methods, which will not be described in detail herein.

[0151] In one embodiment, when the Initial UL BWP configured for the first type of terminal is different from the Initial UL BWP configured for the second type of terminal, since this situation makes it difficult for the base station to accurately determine whether to configure the terminal to send Msg3 on the first Initial UL BWP or the second Initial UL BWP, the resources configured for the terminal to send Msg3 may be inappropriate. Then the first type of terminal may be prohibited from carrying the terminal type indication information in the PUSCH of MsgA, for example, the RedCap terminal may be prohibited from carrying the early indication to indicate 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 parsing the PUSCH of MsgA, but can determine the terminal type by other means, so as to accurately determine whether to configure the terminal to send Msg3 on the first Initial UL BWP or the second InitialUL BWP after accurately determining the terminal type.

[0152] In one embodiment, when the Initial UL BWP configured for the first type of terminal shares PRACH resources with the Initial UL BWP configured for the second type of terminal, it is difficult for the base station to distinguish the types of the two terminals according to the BWP where the two terminals initiate random access, so it is difficult to accurately determine whether the terminal is configured to send Msg3 on the first Initial UL BWP or on the second Initial UL BWP, which may result in inappropriate resources configured for the terminal to send Msg3. Then the first type of terminal may be prohibited from carrying terminal type indication information in the PUSCH of MsgA, for example, the RedCap terminal may be prohibited from carrying early indication to indicate 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 parsing the PUSCH of MsgA, but can determine the terminal type by other means, so as to accurately determine the terminal type and then accurately determine whether the terminal is configured to send Msg3 on the first Initial UL BWP or on the second Initial UL BWP.

[0153] It should be noted that even if the Initial UL BWP configured for the first type of terminal does not share PRACH resources with the Initial UL BWP configured for the second type of terminal, the base station may not be able to distinguish the types of the two terminals according to the BWP where the two terminals initiate random access.

[0154] In one embodiment, when the Initial UL BWP configured for the second type of terminal is greater than the maximum bandwidth (maximum UE BW) supported by the first type of terminal, even if the base station configures the first type of terminal to send Msg3 on the second Initial UL BWP through fallback RAR, 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. Then, the first type of terminal may be prohibited from carrying terminal type indication information in the PUSCH of MsgA, for example, the RedCap terminal may be prohibited from carrying early indication to indicate 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 parsing the PUSCH of MsgA, but can determine the terminal type by other means, so as to accurately determine whether to configure the terminal to send Msg3 on the first Initial UL BWP or on the second Initial UL BWP after accurately determining the terminal type.

[0155] In one embodiment, when the mechanism for determining that the first type of terminal carries the terminal type indication information in Msg3 is invalid, for example, the first type of 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. Then 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 the early indication to indicate 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 parsing the PUSCH of MsgA, but can determine the terminal type by other means, so as to accurately determine the terminal type and accurately determine whether to configure the terminal to send Msg3 on the first Initial UL BWP or on the second Initial UL BWP.

[0156] In one embodiment, when the first type terminal determines that the first type terminal transmits Msg3 based on the intra-time slot frequency hopping scheme, and the frequency hopping amplitude in the intra-time slot frequency hopping scheme is greater than the maximum bandwidth supported by the first type terminal, even if the base station configures the first type terminal to transmit Msg3 based on the intra-time slot frequency hopping scheme through fallback RAR, since the frequency hopping amplitude in the configured intra-time slot frequency hopping scheme is greater than the maximum bandwidth supported by the first type terminal, the first type terminal cannot well support the frequency hopping transmission of this scheme. Then the first type 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 the early indication to indicate 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 parsing the PUSCH of MsgA, but can determine the terminal type by other means, so as to accurately determine whether to configure the terminal to send Msg3 on the first Initial UL BWP or on the second Initial ULBWP after accurately determining the terminal type.

[0157] Corresponding to the aforementioned random access method embodiment, the present disclosure also provides an embodiment of a random access device.

[0158] An embodiment of the present disclosure proposes a random access device, which can be applicable to a first type of terminal. The first type of terminal is configured to carry terminal type indication information in a physical uplink shared channel PUSCH of a random access message MsgA. The first type of terminal can communicate with a base station. The terminal includes but is not limited to mobile phones, tablet computers, wearable devices, sensors, Internet of Things devices and other communication devices. The base station includes but is not limited to base stations in communication systems such as 4G base stations, 5G base stations, and 6G base stations.

[0159] In one embodiment, the first type of terminal is configured to carry terminal type indication information in a physical uplink shared channel PUSCH of a random access message MsgA, and the apparatus includes one or more processors, and the processors are configured to:

[0160] Send MsgA to the base station;

[0161] Receiving a random access response RAR sent by the base station;

[0162] In response to the RAR being a fallback random access response, the random access is re-initiated or Msg3 is sent according to the instruction of the base station.

[0163] In one embodiment, the processor is configured to:

[0164] Re-initiate two-step random access; or

[0165] Re-initiate four-step random access.

[0166] In one embodiment, the processor is configured to:

[0167] The two-step random access is re-initiated on a physical random access channel PRACH resource dedicated to the two-step random access.

[0168] In one embodiment, the processor is configured to:

[0169] The four-step random access is re-initiated on the PRACH resources dedicated to the first type of terminals.

[0170] In one embodiment, the processor is further configured to:

[0171] Determine whether to re-initiate random access when a fallback RAR is received according to an instruction of the base station.

[0172] In one embodiment, the processor is further configured to:

[0173] In response to determining not to re-initiate random access when the fallback RAR is received, a random access message Msg3 is sent to the base station according to the fallback RAR.

[0174] In one embodiment, the indication of the base station includes explicit indication or implicit indication.

[0175] In one embodiment, the indication of the base station is implemented through the fallback RAR or broadcast information.

[0176] In one embodiment, the processor is configured to:

[0177] In response to the RAR being a fallback random access response, determining whether a preset configuration is configured;

[0178] In response to being configured with the preset configuration, random access is re-initiated.

[0179] In one embodiment, the processor is further configured to:

[0180] In response to not being configured with the preset configuration, Msg3 is sent to the base station.

[0181] In one embodiment, the preset configuration includes at least one of the following:

[0182] The initial uplink bandwidth part Initial UL BWP configured for the first type of terminal is different from the Initial UL BWP configured for the second type of terminal;

[0183] The Initial UL BWP configured for the first type of terminal shares PRACH resources with the Initial UL BWP configured for the second type of terminal;

[0184] The Initial UL BWP configured for the second type of terminal is greater than the maximum bandwidth supported by the first type of terminal;

[0185] The mechanism for the first type of terminal to carry terminal type indication information in Msg3 is invalid;

[0186] The first type of terminal transmits Msg3 based on an intra-time slot frequency hopping scheme, and a frequency hopping amplitude in the intra-time slot frequency hopping scheme is greater than a maximum bandwidth supported by the first type of terminal.

[0187] In one embodiment, the first type of terminals comprises non-reduced capability RedCap terminals and the second type of terminals comprises RedCap terminals.

[0188] An embodiment of the present disclosure proposes a random access device, which can be applicable to a base station. 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. The terminal includes but is not limited to mobile phones, tablet computers, wearable devices, sensors, Internet of Things devices and other communication devices. The base station includes but is not limited to base stations in communication systems such as 4G base stations, 5G base stations, and 6G base stations.

[0189] In one embodiment, the apparatus comprises one or more processors configured to:

[0190] Receiving MsgA sent by the first type of terminal;

[0191] In response to not correctly demodulating the PUSCH in the MsgA, sending a fallback RAR to the terminal;

[0192] The random access re-initiated by the receiving terminal.

[0193] In one embodiment, the processor is further configured to:

[0194] Instructs the terminal whether to re-initiate random access when receiving the fallback RAR.

[0195] In one embodiment, the processor is configured to:

[0196] In response to instructing the terminal not to re-initiate random access when a fallback RAR is received, receiving Msg3 sent by the terminal according to the fallback RAR.

[0197] In one embodiment, the processor is further configured to:

[0198] In response to configuring the preset configuration for the terminal, prohibiting the first type of terminal from carrying terminal type indication information in the PUSCH of MsgA.

[0199] In one embodiment, the preset configuration includes at least one of the following:

[0200] The Initial UL BWP configured for the first type of terminal is different from the Initial UL BWP configured for the second type of terminal;

[0201] The Initial UL BWP configured for the first type of terminal shares PRACH resources with the Initial UL BWP configured for the second type of terminal;

[0202] The Initial UL BWP configured for the second type of terminal is greater than the maximum bandwidth supported by the first type of terminal;

[0203] The mechanism for the first type of terminal to carry terminal type indication information in Msg3 is invalid;

[0204] The first type of terminal transmits Msg3 based on an intra-time slot frequency hopping scheme, and a frequency hopping amplitude in the intra-time slot frequency hopping scheme is greater than a maximum bandwidth supported by the first type of terminal.

[0205] In one embodiment, the first type of terminals comprises non-reduced capability RedCap terminals and the second type of terminals comprises RedCap terminals.

[0206] Regarding the device in the above embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment of the relevant method, and will not be elaborated here.

[0207] For the device embodiment, since it basically corresponds to the method embodiment, the relevant parts refer to the partial description of the method embodiment. The device embodiment described above is only schematic, wherein the modules described as separate components may or may not be physically separated, and the components displayed as modules may or may not be physical modules, that is, they may be located in one place, or they may be distributed on multiple network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative work.

[0208] An embodiment of the present disclosure further proposes a communication device, comprising: a processor; a memory for storing a computer program; wherein, when the computer program is executed by the processor, the random access method applicable to the first type of terminal described in any of the above embodiments is implemented.

[0209] An embodiment of the present disclosure further proposes a communication device, comprising: a processor; and a memory for storing a computer program; wherein, when the computer program is executed by the processor, the random access method applicable to a base station described in any of the above embodiments is implemented.

[0210] An embodiment of the present disclosure further provides a computer-readable storage medium for storing a computer program. When the computer program is executed by a processor, the steps in the random access method applicable to a first type of terminal described in any of the above embodiments are implemented.

[0211] An embodiment of the present disclosure further proposes a computer-readable storage medium for storing a computer program. When the computer program is executed by a processor, the steps in the random access method applicable to a base station described in any of the above embodiments are implemented.

[0212] like Figure 7 As shown, Figure 7 is a schematic block diagram of a device 700 for random access according to an embodiment of the present disclosure. The device 700 may be provided as a base station. Figure 7 The apparatus 700 includes a processing component 722, a wireless transmission / reception component 724, an antenna component 726, and a signal processing part specific to a wireless interface, and 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 a base station as described in any of the above embodiments.

[0213] Figure 88 is a schematic block diagram of a random access apparatus 800 according to an embodiment of the present disclosure. For example, 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, etc.

[0214] Reference Figure 8 , the device 800 may include one or more of the following components: a processing component 802 , a memory 804 , a power component 806 , a multimedia component 808 , an audio component 810 , an input / output (I / O) interface 812 , a sensor component 814 , and a communication component 816 .

[0215] The processing component 802 generally controls the overall operation of the device 800, such as operations associated with display, phone 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. In addition, the processing component 802 may include one or more modules to facilitate the interaction between the processing component 802 and other components. For example, the processing component 802 may include a multimedia module to facilitate the interaction between the multimedia component 808 and the processing component 802.

[0216] The memory 804 is configured to store various types of data to support operations on the device 800. Examples of such data include instructions for any application or method operating on the device 800, contact data, phone book data, messages, pictures, videos, etc. The memory 804 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, 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 disk or optical disk.

[0217] The power supply component 806 provides power to the various components of the device 800. The power supply component 806 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for the device 800.

[0218] The multimedia component 808 includes a screen that provides an output interface between the device 800 and the user. In some embodiments, 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 the user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundaries of the touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 808 includes a front camera and / or a rear camera. When the device 800 is in an operating mode, such as a shooting mode or a video mode, the front camera and / or the rear camera may receive external multimedia data. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.

[0219] The audio component 810 is configured to output and / or input audio signals. For example, the audio component 810 includes a microphone (MIC), and when the device 800 is in an operating mode, such as a call mode, a recording mode, and a speech recognition mode, the microphone is configured to receive an external audio signal. The received audio signal can be further stored in the memory 804 or sent via the communication component 816. In some embodiments, the audio component 810 also includes a speaker for outputting audio signals.

[0220] I / O interface 812 provides an interface between processing component 802 and peripheral interface modules, such as keyboards, click wheels, buttons, etc. These buttons may include but are not limited to: a home button, a volume button, a start button, and a lock button.

[0221] The sensor assembly 814 includes one or more sensors for providing various aspects of status assessment for the device 800. For example, the sensor assembly 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 assembly 814 can also detect the position change 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. The sensor assembly 814 may include a proximity sensor configured to detect the presence of a nearby object without any physical contact. The sensor assembly 814 may also include an optical sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 814 may also include an accelerometer, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

[0222] The communication component 816 is configured to facilitate wired or wireless communication between the device 800 and other devices. The device 800 can access a wireless network based on a communication standard, such as WiFi, 2G or 3G, 4G LTE, 5G NR, or a combination thereof. In an exemplary embodiment, the communication component 816 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 816 also includes a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

[0223] In an exemplary embodiment, the apparatus 800 may be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components, and may be used to execute the random access method applicable to the first type of terminal as described in any of the above embodiments.

[0224] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory 804 including instructions, and the instructions can be executed by the processor 820 of the device 800 to complete the random access method applicable to the first type of terminal described in any of the above embodiments. For example, the non-transitory computer-readable storage medium can be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, etc.

[0225] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the disclosure disclosed herein. The present disclosure is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The description and examples are to be considered exemplary only, and the true scope and spirit of the present disclosure are indicated by the following claims.

[0226] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

[0227] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. The terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprises a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0228] The method and device provided in the embodiments of the present disclosure are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present disclosure. The description of the above embodiments is only used to help understand the method of the present disclosure and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present disclosure, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as a limitation on the present disclosure.

Claims

1. A random access method, characterized in that: The method comprises: The terminal sends a MsgA to the base station, where the MsgA includes an early indication, wherein the MsgA is an MsgA in a two-step contention random access 2-step CB-RA, and the terminal is a first type terminal; receiving a random access response sent by the base station, wherein the base station determines that decoding of the PUSCH fails, and the random access response is a fallback random access response fallback RAR; After determining that the configuration of the base station is not pre-configuration, the terminal sends Msg3 to the base station, where the pre-configuration includes at least one of the following: The initial uplink bandwidth part Initial UL BWP configured for the first type of terminal is different from the Initial UL BWP configured for the second type of terminal, the first type of terminal includes a reduced capability RedCap terminal, and the second type of terminal includes a non-RedCap terminal; The Initial UL BWP configured for the first type of terminal shares PRACH resources with the Initial ULBWP configured for the second type of terminal; The Initial UL BWP configured for the second type of terminal is greater than the maximum bandwidth supported by the first type of terminal; The mechanism for the first type of terminal to carry terminal type indication information in Msg3 is invalid; The first type of terminal transmits Msg3 based on an intra-time slot frequency hopping scheme, and a frequency hopping amplitude in the intra-time slot frequency hopping scheme is greater than a maximum bandwidth supported by the first type of terminal.

2. The method according to claim 1, characterized in that The method further comprises: A random access response sent by the base station is received, wherein if the base station determines that the decoding of the PUSCH is successful, the base station sends a random access response to the terminal, and the random access response is a success random access response success RAR.

3. The method according to claim 1 or 2, characterized in that: The method further comprises: After determining that the configuration of the base station is the pre-configuration, the terminal re-initiates four-step random access.

4. The method according to claim 3, characterized in that The re-initiating four-step random access comprises: The four-step random access is re-initiated on the random access channel PRACH resources dedicated to the first type of terminals.

5. A random access method, characterized in that: The method comprises: The base station receives a MsgA sent by the terminal, where the MsgA includes an early indication, wherein the MsgA is an MsgA in a two-step contention random access 2-step CB-RA, and the terminal is a first type terminal; If the base station determines that decoding of the PUSCH fails, the base station sends a random access response to the terminal, where the random access response is a fallback random access response fallback RAR; Receiving Msg3 sent by the terminal in response to the configuration of the base station not being pre-configured, wherein the pre-configuration includes at least one of the following: The initial uplink bandwidth part Initial UL BWP configured for the first type of terminal is different from the Initial UL BWP configured for the second type of terminal, the first type of terminal includes a reduced capability RedCap terminal, and the second type of terminal includes a non-RedCap terminal; The Initial UL BWP configured for the first type of terminal shares PRACH resources with the Initial ULBWP configured for the second type of terminal; The Initial UL BWP configured for the second type of terminal is greater than the maximum bandwidth supported by the first type of terminal; The mechanism for the first type of terminal to carry terminal type indication information in Msg3 is invalid; The first type of terminal transmits Msg3 based on an intra-time slot frequency hopping scheme, and a frequency hopping amplitude in the intra-time slot frequency hopping scheme is greater than a maximum bandwidth supported by the first type of terminal.

6. The method according to claim 5, characterized in that The method further comprises: Sending a random access response to the terminal, wherein if the base station determines that the decoding of the PUSCH is successful, the base station sends a random access response to the terminal, and the random access response is a success random access response success RAR.

7. The method according to claim 5 or 6, characterized in that: The method further comprises: A four-step random access is initiated after the terminal determines that the configuration of the base station is the pre-configuration.

8. The method according to claim 7, characterized in that The terminal re-initiates four-step random access on a random access channel PRACH resource dedicated to first type terminals.

9. A random access device, characterized in that: Applicable to a first terminal, the device includes: A sending module, configured to send MsgA to a base station, wherein the MsgA includes an early indication, wherein the MsgA is an MsgA in a two-step contention random access 2-step CB-RA, and the terminal is a first type of terminal; a receiving module configured to receive a random access response sent by the base station, wherein the base station determines that decoding of the PUSCH fails, and the random access response is a fallback random access response fallback RAR; After the terminal determines that the configuration of the base station is not pre-configured, the sending module is further configured to send Msg3 to the base station, wherein the pre-configuration includes at least one of the following: The initial uplink bandwidth part Initial UL BWP configured for the first type of terminal is different from the Initial UL BWP configured for the second type of terminal, the first type of terminal includes a reduced capability RedCap terminal, and the second type of terminal includes a non-RedCap terminal; The Initial UL BWP configured for the first type of terminal shares PRACH resources with the Initial ULBWP configured for the second type of terminal; The Initial UL BWP configured for the second type of terminal is greater than the maximum bandwidth supported by the first type of terminal; The mechanism for the first type of terminal to carry terminal type indication information in Msg3 is invalid; The first type of terminal transmits Msg3 based on an intra-time slot frequency hopping scheme, and a frequency hopping amplitude in the intra-time slot frequency hopping scheme is greater than a maximum bandwidth supported by the first type of terminal.

10. A random access device, characterized in that: Applicable to a base station, the device comprises: A receiving module, configured to receive a MsgA sent by a terminal, wherein the MsgA includes an early indication, wherein the MsgA is an MsgA in a two-step contention random access 2-step CB-RA, and the terminal is a first type of terminal; a sending module, configured to send a random access response to the terminal if the base station determines that decoding of the PUSCH fails, wherein the random access response is a fallback random access response fallback RAR; The receiving is further configured to receive Msg3 sent by the terminal in response to the configuration of the base station not being pre-configured, and the pre-configuration includes at least one of the following: The initial uplink bandwidth part Initial UL BWP configured for the first type of terminal is different from the Initial UL BWP configured for the second type of terminal, the first type of terminal includes a reduced capability RedCap terminal, and the second type of terminal includes a non-RedCap terminal; The Initial UL BWP configured for the first type of terminal shares PRACH resources with the Initial ULBWP configured for the second type of terminal; The Initial UL BWP configured for the second type of terminal is greater than the maximum bandwidth supported by the first type of terminal; The mechanism for the first type of terminal to carry terminal type indication information in Msg3 is invalid; The first type of terminal transmits Msg3 based on an intra-time slot frequency hopping scheme, and a frequency hopping amplitude in the intra-time slot frequency hopping scheme is greater than a maximum bandwidth supported by the first type of terminal.

11. A communication device, characterized in that: include: processor; memory for storing computer programs; When the computer program is executed by a processor, the random access method according to any one of claims 1 to 4 is implemented.

12. A communication device, characterized in that: include: processor; memory for storing computer programs; When the computer program is executed by a processor, the random access method according to any one of claims 5 to 8 is implemented.

13. A computer-readable storage medium for storing a computer program, characterized in that: When the computer program is executed by a processor, the steps in the random access method according to any one of claims 1 to 4 are implemented.

14. A computer-readable storage medium for storing a computer program, characterized in that: When the computer program is executed by a processor, the steps in the random access method according to any one of claims 5 to 8 are implemented.

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