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

Abstract

The present disclosure relates to a communication method, a terminal, a network device, a system, and a storage medium. The method comprises: receiving a random access channel (RACH) configuration sent by a network device; and sending assistance information to the network device on the basis of the RACH configuration, the assistance information being used for instructing the network device to determine the number of retransmissions of first downlink access information on the basis of the assistance information, and the first downlink access information comprising: at least one of contention random access response information Msg2, contention resolution information Msg4, and non-contention random access response information MsgB. Thus, the network device configures RACH resources for a terminal, and compared with a scenario where there are no determined resources for transmission, the use of different RACH resources ensures effective transmission of assistance information; further, the network device determines the number of retransmissions of downlink access information on the basis of the assistance information, thereby improving the downlink coverage performance of the network device.

Description

Communication method, terminal, network device, system and storage medium Technical Field

[0001] The present disclosure relates to the field of communication technologies, and in particular to a communication method, terminal, network device, system, and storage medium. Background Art

[0002] For NTN (Non-Terrestrial Network) networks, downlink coverage issues are more severe than those for TN (Terrestrial Network) networks due to the higher altitude of satellites. Therefore, downlink coverage enhancement solutions are required to ensure communication quality. Random access downlink information, as part of downlink messages, can also face coverage issues in certain scenarios, hindering random access by terminals and affecting communication performance.

[0003] Summary of the Invention

[0004] In order to overcome the downlink coverage problem of random access information in related technologies, the present disclosure provides a communication method, terminal, network device, system and storage medium.

[0005] According to a first aspect of an embodiment of the present disclosure, a communication method is provided, which is performed by a terminal. The method includes:

[0006] Receive random access channel RACH configuration sent by the network device;

[0007] Send auxiliary information to the network device according to the RACH configuration, where the auxiliary information is used to instruct the network device to determine a number of retransmissions of first downlink access information according to the auxiliary information, where the first downlink access information includes at least one of contention random access response information Msg2, contention resolution information Msg4, and non-contention random access response information MsgB.

[0008] According to a second aspect of an embodiment of the present disclosure, a communication method is provided, which is performed by a network device. The method includes:

[0009] Send a RACH configuration to the terminal, where the RACH configuration is used to instruct the terminal to send auxiliary information to the network device according to the RACH configuration, where the auxiliary information is used to instruct the network device to determine the number of retransmissions of first downlink access information based on the auxiliary information, where the first downlink access information includes: at least one of contention random access response information Msg2, contention resolution information Msg4, and non-contention random access response information MsgB.

[0010] According to a third aspect of an embodiment of the present disclosure, a communication method is provided, the method comprising:

[0011] The network device sends the RACH configuration to the terminal;

[0012] The terminal sends auxiliary information to the network device according to the RACH configuration;

[0013] The network device determines the number of retransmissions of first downlink access information according to the auxiliary information, where the first downlink access information includes at least one of contention random access response information Msg2, contention resolution information Msg4, and non-contention random access response information MsgB.

[0014] According to a fourth aspect of an embodiment of the present disclosure, a terminal is provided, including:

[0015] The first transceiver module is configured to receive a random access channel RACH configuration sent by a network device;

[0016] The first processing module is configured to send auxiliary information to the network device according to the RACH configuration, where the auxiliary information is used to instruct the network device to determine a number of retransmissions of first downlink access information according to the auxiliary information, where the first downlink access information includes at least one of contention random access response information Msg2, contention resolution information Msg4, and non-contention random access response information MsgB.

[0017] According to a fifth aspect of an embodiment of the present disclosure, a network device is provided, including:

[0018] The second transceiver module is configured to send a RACH configuration to the terminal, where the RACH configuration is used to instruct the terminal to send auxiliary information to the network device according to the RACH configuration, where the auxiliary information is used to instruct the network device to determine a number of retransmissions of first downlink access information according to the auxiliary information, where the first downlink access information includes at least one of contention random access response information Msg2, contention resolution information Msg4, and non-contention random access response information MsgB.

[0019] According to a sixth aspect of an embodiment of the present disclosure, a terminal is provided, including:

[0020] one or more processors;

[0021] The terminal is used to execute the communication method described in any one of the first aspects of this disclosure.

[0022] According to a seventh aspect of an embodiment of the present disclosure, a network device is provided, including:

[0023] one or more processors;

[0024] The network device is used to execute the communication method described in any one of the second aspects of this disclosure.

[0025] According to an eighth aspect of an embodiment of the present disclosure, a communication system is provided, comprising a terminal and a network device, wherein the terminal is configured to implement the communication method described in any one of the first aspects of the present disclosure, and the network device is configured to implement the communication method described in any one of the second aspects of the present disclosure.

[0026] According to the ninth aspect of an embodiment of the present disclosure, a storage medium is provided, which stores instructions. When the instructions are executed on a communication device, the communication device executes a communication method as described in any one of the first aspects of the present disclosure, or the communication device executes a communication method as described in any one of the second aspects of the present disclosure.

[0027] In the above technical solution, a random access channel (RACH) configuration sent by a network device is received, and auxiliary information is sent to the network device based on the RACH configuration. The auxiliary information is used to instruct the network device to determine the number of retransmissions of first downlink access information based on the auxiliary information. The first downlink access information includes at least one of contention random access response information (Mg2), contention resolution information (Mg4), and non-contention random access response information (MgB). Thus, the network device configures RACH resources for the terminal. Compared to a scenario where no resources are determined for transmission, the use of different RACH resources ensures the effective transmission of the auxiliary information. Furthermore, the network device determines the number of retransmissions of the downlink access information based on the auxiliary information, thereby improving the downlink coverage performance of the network device. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following drawings required for describing the embodiments are introduced. The following drawings are merely some embodiments of the present disclosure and do not impose specific limitations on the protection scope of the present disclosure.

[0029] FIG1 is a schematic diagram showing the architecture of a communication system according to an embodiment of the present disclosure.

[0030] FIG2 is an interactive schematic diagram illustrating a communication method according to an embodiment of the present disclosure.

[0031] FIG3 is a flow chart of a communication method according to an embodiment of the present disclosure.

[0032] FIG4 is a flow chart showing a communication method according to an embodiment of the present disclosure.

[0033] FIG5 is a flow chart showing a communication method according to an embodiment of the present disclosure.

[0034] FIG6 is a schematic diagram of the structure of a terminal proposed in an embodiment of the present disclosure.

[0035] FIG7 is a schematic diagram of the structure of a network device proposed in an embodiment of the present disclosure.

[0036] FIG8 is a schematic structural diagram of a communication device 8100 according to an embodiment of the present disclosure.

[0037] FIG9 is a schematic structural diagram of a chip 8200 according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0038] The embodiments of the present disclosure provide a communication method, a terminal, a network device, a system, and a storage medium.

[0039] In a first aspect, an embodiment of the present disclosure provides a communication method, which is executed by a terminal. The method includes:

[0040] Receive random access channel RACH configuration sent by the network device;

[0041] Send auxiliary information to the network device according to the RACH configuration, where the auxiliary information is used to instruct the network device to determine a number of retransmissions of first downlink access information according to the auxiliary information, where the first downlink access information includes at least one of contention random access response information Msg2, contention resolution information Msg4, and non-contention random access response information MsgB.

[0042] In combination with some embodiments of the first aspect, the number of retransmissions includes the number of physical downlink control channel PDCCH retransmissions and / or the number of physical downlink shared channel PDSCH retransmissions.

[0043] In conjunction with some embodiments of the first aspect, the RACH configuration includes at least one of the following:

[0044] dedicated RACH resource configuration information supporting a characteristic combination of the first downlink access information;

[0045] Common RACH resource configuration information supporting the characteristic combination of the first downlink access information.

[0046] In conjunction with some embodiments of the first aspect, the combination of characteristics includes at least one of the following:

[0047] Connection request message Msg3 is retransmitted;

[0048] Contention random access request message Msg1 retransmission;

[0049] Performance reduction RedCap;

[0050] Small packet data, where the data size of the small packet data is smaller than the set size;

[0051] Network Slicing Automation and Service Management NSAG.

[0052] In conjunction with some embodiments of the first aspect, the feature combination includes information element IE information, where the IE information is used to indicate at least one of the following:

[0053] The Msg2 is retransmitted;

[0054] The Msg4 is retransmitted;

[0055] The Msg2 and the Msg4 are retransmitted;

[0056] The Msg2 and the MsgB are retransmitted;

[0057] The Msg2, the Msg4, and the MsgB are retransmitted.

[0058] In conjunction with some embodiments of the first aspect, the RACH configuration includes indication information, where the indication information is used to indicate at least one of the following:

[0059] The RACH configuration corresponds to a number of retransmissions of the first downlink access information;

[0060] The reference signal received power RSRP interval corresponding to the RACH configuration;

[0061] The RACH configuration corresponds to a channel quality indicator CQI interval.

[0062] In combination with some embodiments of the first aspect, the feature combination includes IE information, and the IE information includes the indication information.

[0063] In combination with some embodiments of the first aspect, the RACH configuration adopts shared random access opportunity RO configuration and / or separate RO configuration.

[0064] In conjunction with some embodiments of the first aspect, the RACH configuration adopts the shared RO configuration, and the RACH configuration supports at least one of the following:

[0065] a first feature combination, the first feature combination including at least one of the Msg2 retransmission, the Msg4 retransmission, and the MsgB retransmission;

[0066] the number of retransmissions of the first downlink access information;

[0067] RSRP interval;

[0068] CQI interval;

[0069] First shared parameter, the shared parameter includes at least one of the following:

[0070] Preamble target received power;

[0071] Power increase step size;

[0072] Maximum number of preamble transmissions;

[0073] Response receiving window;

[0074] System synchronization block SSB resource index;

[0075] Supplementary uplink SUL signal strength threshold;

[0076] Preamble start offset;

[0077] Number of preambles;

[0078] Number of leader sequences in group A;

[0079] Power offset value of group B;

[0080] The number of random access preamble sequences available in group A.

[0081] In conjunction with some embodiments of the first aspect, the RACH configuration adopts the separate RO configuration, and the RACH configuration supports at least one of the following:

[0082] a first feature combination, the first feature combination including at least one of the Msg2 retransmission, the Msg4 retransmission, and the MsgB retransmission;

[0083] the number of retransmissions of the first downlink access information;

[0084] the RSRP interval;

[0085] the CQI interval;

[0086] The second shared parameter includes at least one of the following:

[0087] Physical random access channel PRACH configuration index;

[0088] Msg1-Frequency Division Multiplexing FDM;

[0089] Msg1 starting frequency;

[0090] Zero correlation area configuration;

[0091] Preamble target received power;

[0092] Maximum number of preamble transmissions;

[0093] Power increase step size;

[0094] Response receiving window;

[0095] Total number of random access RA signaling;

[0096] The number of preamble sequences of the SSB corresponding to the control information block CB and the reference signal power threshold of the SUL frequency band SSB;

[0097] Time threshold for random access contention resolution;

[0098] PRACH root sequence index;

[0099] Msg1 subcarrier spacing;

[0100] Restricted collection configuration;

[0101] Msg3 transform precoder;

[0102] RA access identification priority;

[0103] Number of leader sequences in group A;

[0104] Power offset value of group B;

[0105] The number of random access preamble sequences available in group A.

[0106] In combination with some embodiments of the first aspect, the RACH configuration includes a first RACH resource configuration of a four-step RA process and / or a second RACH resource configuration of a two-step RA process.

[0107] In combination with some embodiments of the first aspect, the RACH configuration includes the first RACH resource configuration, the first RACH resource configuration includes a RACH common configuration, and the RACH common configuration is used to indicate a RACH resource configuration for retransmission of the first downlink access information.

[0108] In combination with some embodiments of the first aspect, the RACH configuration includes the second RACH resource configuration, the second RACH resource configuration includes a non-contention random access request information MsgA public configuration, and the MsgA public configuration is used to indicate the RACH resource configuration for retransmission of the first downlink access information.

[0109] In combination with some embodiments of the first aspect, the RACH configuration includes a third RACH resource configuration for contention-based random access (CBRA) and / or a fourth RACH resource configuration for non-contention-based random access (CFRA).

[0110] With reference to some embodiments of the first aspect, the RACH configuration includes the fourth RACH resource configuration, and the CFRA includes a CFRA triggered by a PDCCH protocol.

[0111] In combination with some embodiments of the first aspect, the RACH configuration includes the fourth RACH resource configuration, the CFRA includes a CFRA triggered by a primary and secondary cell change, and the primary and secondary cell change includes at least one of primary and secondary cell switching, primary and secondary cell addition, and primary and secondary cell change.

[0112] In combination with some embodiments of the first aspect, the fourth RACH resource configuration and the CFRA-RACH configuration of the PRACH transmission adopt a shared RO configuration and / or a separate RO configuration.

[0113] With reference to some embodiments of the first aspect, the fourth RACH resource configuration is carried in CFRA-IE information and / or CFRA-Two-Step Procedure-IE information.

[0114] In combination with some embodiments of the first aspect, the RACH configuration includes the fourth RACH resource configuration, and the CFRA includes a CFRA triggered by beam failure recovery (BFR).

[0115] In conjunction with some embodiments of the first aspect, the fourth RACH resource configuration includes at least one of the following:

[0116] BFR root sequence index;

[0117] Preamble target received power;

[0118] Power increase step size;

[0119] Maximum number of preamble transmissions;

[0120] Response receiving window;

[0121] Candidate beam reference signal list;

[0122] RSRP-SSB threshold;

[0123] RACH-SSB search space configuration;

[0124] RA-SSB mask index;

[0125] Search space ID for uplink transmission data;

[0126] RA priority;

[0127] Msg1 subcarrier spacing;

[0128] The number of retransmissions of the first downlink access information;

[0129] RSRP interval;

[0130] CQI interval.

[0131] With reference to some embodiments of the first aspect, the RACH configuration includes the third RACH resource configuration, and the third RACH resource configuration includes a CBRA configuration of BFR.

[0132] In conjunction with some embodiments of the first aspect, the third RACH resource configuration includes at least one of the following:

[0133] Preamble target received power;

[0134] Power increase step size;

[0135] Maximum number of preamble transmissions;

[0136] Response receiving window;

[0137] RA priority;

[0138] RA two-step random access priority;

[0139] Msg1 subcarrier spacing.

[0140] In combination with some embodiments of the first aspect, the RACH configuration includes the third RACH resource configuration, the third RACH resource configuration includes the CBRA configuration of the primary and secondary cell change, and the primary and secondary cell change includes at least one of primary and secondary cell switching, primary and secondary cell addition, and primary and secondary cell change.

[0141] In conjunction with some embodiments of the first aspect, the third RACH resource configuration includes at least one of the following:

[0142] Preamble target received power;

[0143] Power increase step size;

[0144] Maximum number of preamble transmissions;

[0145] Response receiving window;

[0146] RA priority;

[0147] RA two-step random access priority;

[0148] Msg1 subcarrier spacing.

[0149] In combination with some embodiments of the first aspect, the RACH configuration includes RACH resource configuration required by a serial interface SI.

[0150] In conjunction with some embodiments of the first aspect, the RACH resource configuration required by the SI is:

[0151] RACH resource configuration corresponding to the SI requirement for the number of retransmissions;

[0152] RSRP interval corresponds to RACH resource configuration of SI requirements;

[0153] The CQI interval corresponds to the RACH resource configuration required by the SI.

[0154] In combination with some embodiments of the first aspect, the RACH configuration includes characteristic priority information of the first downlink access information.

[0155] In combination with some embodiments of the first aspect, the number of retransmissions, RSRP interval or CQI interval under the characteristic combination has the same priority.

[0156] In a second aspect, an embodiment of the present disclosure provides a communication method, which is performed by a network device. The method includes:

[0157] Send a RACH configuration to the terminal, where the RACH configuration is used to instruct the terminal to send auxiliary information to the network device according to the RACH configuration, where the auxiliary information is used to instruct the network device to determine the number of retransmissions of first downlink access information based on the auxiliary information, where the first downlink access information includes: at least one of contention random access response information Msg2, contention resolution information Msg4, and non-contention random access response information MsgB.

[0158] In combination with some embodiments of the second aspect, the number of retransmissions includes the number of physical downlink control channel PDCCH retransmissions and / or the number of physical downlink shared channel PDSCH retransmissions.

[0159] In conjunction with some embodiments of the second aspect, the RACH configuration includes at least one of the following:

[0160] dedicated RACH resource configuration information supporting a characteristic combination of the first downlink access information;

[0161] Common RACH resource configuration information supporting the characteristic combination of the first downlink access information.

[0162] In conjunction with some embodiments of the second aspect, the combination of features includes at least one of the following:

[0163] Connection request message Msg3 is retransmitted;

[0164] Contention random access request message Msg1 retransmission;

[0165] Performance reduction RedCap;

[0166] Small packet data, where the data size of the small packet data is smaller than the set size;

[0167] Network Slicing Automation and Service Management NSAG.

[0168] In conjunction with some embodiments of the second aspect, the feature combination includes information element IE information, where the IE information is used to indicate at least one of the following:

[0169] The Msg2 is retransmitted;

[0170] The Msg4 is retransmitted;

[0171] The Msg2 and the Msg4 are retransmitted;

[0172] The Msg2 and the MsgB are retransmitted;

[0173] The Msg2, the Msg4, and the MsgB are retransmitted.

[0174] In conjunction with some embodiments of the second aspect, the RACH configuration includes indication information, where the indication information is used to indicate at least one of the following:

[0175] The RACH configuration corresponds to a number of retransmissions of the first downlink access information;

[0176] The reference signal received power RSRP interval corresponding to the RACH configuration;

[0177] The RACH configuration corresponds to a channel quality indicator CQI interval.

[0178] In combination with some embodiments of the second aspect, the feature combination includes IE information, and the IE information includes the indication information.

[0179] In combination with some embodiments of the second aspect, the RACH configuration adopts shared random access opportunity RO configuration and / or separate RO configuration.

[0180] In conjunction with some embodiments of the second aspect, the RACH configuration adopts the shared RO configuration, and the RACH configuration supports at least one of the following:

[0181] a first feature combination, the first feature combination including at least one of the Msg2 retransmission, the Msg4 retransmission, and the MsgB retransmission;

[0182] the number of retransmissions of the first downlink access information;

[0183] RSRP interval;

[0184] CQI interval;

[0185] First shared parameter, the shared parameter includes at least one of the following:

[0186] Preamble target received power;

[0187] Power increase step size;

[0188] Maximum number of preamble transmissions;

[0189] Response receiving window;

[0190] System synchronization block SSB resource index;

[0191] Supplementary uplink SUL signal strength threshold;

[0192] Preamble start offset;

[0193] Number of preambles;

[0194] Number of leader sequences in group A;

[0195] Power offset value of group B;

[0196] The number of random access preamble sequences available in group A.

[0197] In conjunction with some embodiments of the second aspect, the RACH configuration adopts the separate RO configuration, and the RACH configuration supports at least one of the following:

[0198] a first feature combination, the first feature combination including at least one of the Msg2 retransmission, the Msg4 retransmission, and the MsgB retransmission;

[0199] the number of retransmissions of the first downlink access information;

[0200] the RSRP interval;

[0201] the CQI interval;

[0202] The second shared parameter includes at least one of the following:

[0203] Physical random access channel PRACH configuration index;

[0204] Msg1-Frequency Division Multiplexing FDM;

[0205] Msg1 starting frequency;

[0206] Zero correlation area configuration;

[0207] Preamble target received power;

[0208] Maximum number of preamble transmissions;

[0209] Power increase step size;

[0210] Response receiving window;

[0211] Total number of random access RA signaling;

[0212] The number of preamble sequences of the SSB corresponding to the control information block CB and the reference signal power threshold of the SUL frequency band SSB;

[0213] Time threshold for random access contention resolution;

[0214] PRACH root sequence index;

[0215] Msg1 subcarrier spacing;

[0216] Restricted collection configuration;

[0217] Msg3 transform precoder;

[0218] RA access identification priority;

[0219] Number of leader sequences in group A;

[0220] Power offset value of group B;

[0221] The number of random access preamble sequences available in group A.

[0222] In combination with some embodiments of the second aspect, the RACH configuration includes a first RACH resource configuration of a four-step RA process and / or a second RACH resource configuration of a two-step RA process.

[0223] In combination with some embodiments of the second aspect, the RACH configuration includes the first RACH resource configuration, the first RACH resource configuration includes a RACH common configuration, and the RACH common configuration is used to indicate a RACH resource configuration for retransmission of the first downlink access information.

[0224] In combination with some embodiments of the second aspect, the RACH configuration includes the second RACH resource configuration, the second RACH resource configuration includes a non-contention random access request information MsgA public configuration, and the MsgA public configuration is used to indicate the RACH resource configuration for retransmission of the first downlink access information.

[0225] In combination with some embodiments of the second aspect, the RACH configuration includes a third RACH resource configuration for contention-based random access (CBRA) and / or a fourth RACH resource configuration for non-contention-based random access (CFRA).

[0226] With reference to some embodiments of the second aspect, the RACH configuration includes the fourth RACH resource configuration, and the CFRA includes CFRA triggered by the PDCCH protocol.

[0227] In combination with some embodiments of the second aspect, the RACH configuration includes the fourth RACH resource configuration, the CFRA includes a CFRA triggered by a primary and secondary cell change, and the primary and secondary cell change includes at least one of primary and secondary cell switching, primary and secondary cell addition, and primary and secondary cell change.

[0228] In combination with some embodiments of the second aspect, the fourth RACH resource configuration and the CFRA-RACH configuration of the PRACH transmission adopt a shared RO configuration and / or a separate RO configuration.

[0229] In combination with some embodiments of the second aspect, the fourth RACH resource configuration is carried in CFRA-IE information and / or CFRA-Two-Step Procedure-IE information.

[0230] In combination with some embodiments of the second aspect, the RACH configuration includes the fourth RACH resource configuration, and the CFRA includes a CFRA triggered by beam failure recovery (BFR).

[0231] In conjunction with some embodiments of the second aspect, the fourth RACH resource configuration includes at least one of the following:

[0232] BFR root sequence index;

[0233] Preamble target received power;

[0234] Power increase step size;

[0235] Maximum number of preamble transmissions;

[0236] Response receiving window;

[0237] Candidate beam reference signal list;

[0238] RSRP-SSB threshold;

[0239] RACH-SSB search space configuration;

[0240] RA-SSB mask index;

[0241] Search space ID for uplink transmission data;

[0242] RA priority;

[0243] Msg1 subcarrier spacing;

[0244] The number of retransmissions of the first downlink access information;

[0245] RSRP interval;

[0246] CQI interval.

[0247] With reference to some embodiments of the second aspect, the RACH configuration includes the third RACH resource configuration, and the third RACH resource configuration includes a CBRA configuration of BFR.

[0248] In conjunction with some embodiments of the second aspect, the third RACH resource configuration includes at least one of the following:

[0249] Preamble target received power;

[0250] Power increase step size;

[0251] Maximum number of preamble transmissions;

[0252] Response receiving window;

[0253] RA priority;

[0254] RA two-step random access priority;

[0255] Msg1 subcarrier spacing.

[0256] In combination with some embodiments of the second aspect, the RACH configuration includes the third RACH resource configuration, the third RACH resource configuration includes the CBRA configuration of the primary and secondary cell change, and the primary and secondary cell change includes at least one of primary and secondary cell switching, primary and secondary cell addition, and primary and secondary cell change.

[0257] In conjunction with some embodiments of the second aspect, the third RACH resource configuration includes at least one of the following:

[0258] Preamble target received power;

[0259] Power increase step size;

[0260] Maximum number of preamble transmissions;

[0261] Response receiving window;

[0262] RA priority;

[0263] RA two-step random access priority;

[0264] Msg1 subcarrier spacing.

[0265] In combination with some embodiments of the second aspect, the RACH configuration includes RACH resource configuration required by a serial interface SI.

[0266] In conjunction with some embodiments of the second aspect, the RACH resource configuration required by the SI is:

[0267] The number of retransmissions corresponds to the RACH resource configuration required by the SI;

[0268] RSRP interval corresponds to RACH resource configuration of SI requirements;

[0269] The CQI interval corresponds to the RACH resource configuration required by the SI.

[0270] In combination with some embodiments of the second aspect, the RACH configuration includes characteristic priority information of the first downlink access information.

[0271] In combination with some embodiments of the second aspect, the number of retransmissions, RSRP interval or CQI interval under the characteristic combination has the same priority.

[0272] In a third aspect, an embodiment of the present disclosure provides a communication method, the method comprising:

[0273] The network device sends the RACH configuration to the terminal;

[0274] The terminal sends auxiliary information to the network device according to the RACH configuration;

[0275] The network device determines the number of retransmissions of first downlink access information according to the auxiliary information, where the first downlink access information includes at least one of contention random access response information Msg2, contention resolution information Msg4, and non-contention random access response information MsgB.

[0276] In a fourth aspect, an embodiment of the present disclosure provides a terminal, including:

[0277] The first transceiver module is configured to receive a random access channel RACH configuration sent by a network device;

[0278] The first processing module is configured to send auxiliary information to the network device according to the RACH configuration, where the auxiliary information is used to instruct the network device to determine a number of retransmissions of first downlink access information according to the auxiliary information, where the first downlink access information includes at least one of contention random access response information Msg2, contention resolution information Msg4, and non-contention random access response information MsgB.

[0279] In a fifth aspect, an embodiment of the present disclosure provides a network device, including:

[0280] The second transceiver module is configured to send a RACH configuration to the terminal, where the RACH configuration is used to instruct the terminal to send auxiliary information to the network device according to the RACH configuration, where the auxiliary information is used to instruct the network device to determine a number of retransmissions of first downlink access information according to the auxiliary information, where the first downlink access information includes at least one of contention random access response information Msg2, contention resolution information Msg4, and non-contention random access response information MsgB.

[0281] In a sixth aspect, an embodiment of the present disclosure provides a terminal, including:

[0282] one or more processors;

[0283] The terminal is used to execute the communication method described in any one of the first aspects of this disclosure.

[0284] In a seventh aspect, an embodiment of the present disclosure provides a network device, including:

[0285] one or more processors;

[0286] The network device is used to execute the communication method described in any one of the second aspects of this disclosure.

[0287] In an eighth aspect, an embodiment of the present disclosure provides a communication system, comprising a terminal and a network device, wherein the terminal is configured to implement the communication method described in any one of the first aspects of the present disclosure, and the network device is configured to implement the communication method described in any one of the second aspects of the present disclosure.

[0288] In the ninth aspect, an embodiment of the present disclosure provides a storage medium, which stores instructions. When the instructions are executed on a communication device, the communication device executes the communication method as described in any one of the first aspects of the present disclosure, or the communication device executes the communication method as described in any one of the second aspects of the present disclosure.

[0289] Through the above method, a random access channel (RACH) configuration sent by a network device is received, and auxiliary information is sent to the network device based on the RACH configuration. The auxiliary information is used to instruct the network device to determine the number of retransmissions of first downlink access information based on the auxiliary information. The first downlink access information includes at least one of contention random access response information Msg2, contention resolution information Msg4, and non-contention random access response information MsgB. The network device thus configures RACH resources for the terminal, transmits the auxiliary information using different RACH resources, and determines the number of retransmissions of the downlink access information based on the auxiliary information, thereby improving the downlink coverage performance of the network device.

[0290] The present disclosure provides a communication method, terminal, network device, system, and storage medium. In some embodiments, the terms "communication method," "information processing method," and "communication method" are interchangeable; the terms "communication device," "information processing device," and "communication device" are interchangeable; and the terms "information processing system," "communication system," and "communication system" are interchangeable.

[0291] The embodiments of the present disclosure are not exhaustive and are merely illustrative of some embodiments, and are not intended to be a specific limitation on the scope of protection of the present disclosure. In the absence of contradiction, each step in a certain embodiment can be implemented as an independent embodiment, and the steps can be arbitrarily combined. For example, a solution after removing some steps in a certain embodiment can also be implemented as an independent embodiment, and the order of the steps in a certain embodiment can be arbitrarily exchanged. In addition, the optional implementation methods in a certain embodiment can be arbitrarily combined; in addition, the embodiments can be arbitrarily combined. For example, some or all steps of different embodiments can be arbitrarily combined, and a certain embodiment can be arbitrarily combined with the optional implementation methods of other embodiments.

[0292] In each embodiment of the present disclosure, unless otherwise specified or provided for by logic, the terms and / or descriptions between the embodiments are consistent and can be referenced by each other. The technical features in different embodiments can be combined to form a new embodiment based on their inherent logical relationships.

[0293] The terms used in the embodiments of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure.

[0294] In the embodiments of the present disclosure, unless otherwise specified, elements expressed in the singular, such as "a", "an", "the", "above", "said", "the", "the", etc., may mean "one and only one", or "one or more", "at least one", etc. For example, when using articles such as "a", "an", "the" in English in translation, the noun following the article may be understood as a singular expression or a plural expression.

[0295] In the embodiments of the present disclosure, “plurality” refers to two or more.

[0296] In some embodiments, the terms "at least one," "one or more," "a plurality of," "multiple," etc. may be used interchangeably.

[0297] In some embodiments, descriptions such as "at least one of A and B," "A and / or B," "A in one case, B in another case," or "in response to one case A, in response to another case B" may include the following technical solutions depending on the situation: in some embodiments, A (A is executed independently of B); in some embodiments, B (B is executed independently of A); in some embodiments, execution is selected from A and B (A and B are selectively executed); and in some embodiments, A and B (both A and B are executed). The above is also applicable when there are more branches such as A, B, and C.

[0298] In some embodiments, "A or B" and other descriptions may include the following technical solutions depending on the situation: in some embodiments, A (A is executed independently of B); in some embodiments, B (B is executed independently of A); in some embodiments, execution is selected from A and B (A and B are selectively executed). The above is also applicable when there are more branches such as A, B, C, etc.

[0299] The prefixes such as "first" and "second" in the embodiments of the present disclosure are only used to distinguish different description objects and do not constitute any restriction on the position, order, priority, quantity or content of the description objects. For the statement of the description object, please refer to the description in the context of the claims or embodiments, and no unnecessary restriction should be constituted due to the use of prefixes. For example, if the description object is a "field", the ordinal number before the "field" in the "first field" and the "second field" does not limit the position or order between the "fields". "First" and "second" do not limit whether the "fields" they modify are in the same message, nor do they limit the order of the "first field" and the "second field". For another example, if the description object is a "level", the ordinal number before the "level" in the "first level" and the "second level" does not limit the priority between the "levels". For another example, the number of description objects is not limited by the ordinal number and can be one or more. Taking "first device" as an example, the number of "devices" can be one or more. In addition, the objects modified by different prefixes can be the same or different. For example, if the description object is "device", then the "first device" and the "second device" can be the same device or different devices, and their types can be the same or different; for another example, if the description object is "information", then the "first information" and the "second information" can be the same information or different information, and their contents can be the same or different.

[0300] In some embodiments, “including A,” “comprising A,” “used to indicate A,” and “carrying A” can be interpreted as directly carrying A or indirectly indicating A.

[0301] In some embodiments, terms such as "time / frequency" and "time / frequency domain" refer to the time domain and / or the frequency domain.

[0302] In some embodiments, terms such as "in response to...", "in response to determining...", "in the case of...", "at the time of...", "when...", "if...", "if...", etc. can be used interchangeably.

[0303] In some embodiments, terms such as "greater than", "greater than or equal to", "not less than", "more than", "more than or equal to", "not less than", "higher than", "higher than or equal to", "not less than", and "above" can be replaced with each other, and terms such as "less than", "less than or equal to", "not greater than", "less than", "less than or equal to", "not more than", "lower than", "lower than or equal to", "not higher than", and "below" can be replaced with each other.

[0304] In some embodiments, devices, etc. can be interpreted as physical or virtual, and their names are not limited to the names recorded in the embodiments. Terms such as "device", "equipment", "device", "circuit", "network element", "node", "function", "unit", "section", "system", "network", "chip", "chip system", "entity", and "subject" can be used interchangeably.

[0305] In some embodiments, "network" can be interpreted as devices included in the network (eg, access network equipment, core network equipment, etc.).

[0306] In some embodiments, the terms "access network device (AN device)", "radio access network device (RAN device)", "base station (BS)", "radio base station" "fixed station", "node", "access point", "transmission point (TP)", "reception point (RP)", "transmission / reception point (TRP)" "panel", "antenna panel", "antenna array", "cell", "macro cell", "small cell", "femto cell", "pico cell", "sector", "cell group", "serving cell", "carrier", "component carrier", "bandwidth part (BWP)" and the like may be used interchangeably.

[0307] In some embodiments, the terms "terminal", "terminal device", "user equipment (UE)", "user terminal", "mobile station (MS)", "mobile terminal (MT)", subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, etc. can be used interchangeably.

[0308] In some embodiments, the access network device, the core network device, or the network device can be replaced by a terminal. For example, the various embodiments of the present disclosure can also be applied to a structure in which the communication between the access network device, the core network device, or the network device and the terminal is replaced by communication between multiple terminals (for example, device-to-device (D2D), vehicle-to-everything (V2X), etc.). In this case, it is also possible to set the structure in which the terminal has all or part of the functions of the access network device. In addition, terms such as "uplink" and "downlink" can also be replaced by terms corresponding to communication between terminals (for example, "side"). For example, uplink channels, downlink channels, etc. can be replaced by side channels, and uplinks, downlinks, etc. can be replaced by side links.

[0309] In some embodiments, the terminal may be replaced by an access network device, a core network device, or a network device. In this case, the access network device, the core network device, or the network device may have a structure that has all or part of the functions of the terminal.

[0310] In some embodiments, obtaining data, information, etc. may comply with the laws and regulations of the country where the data is obtained.

[0311] In some embodiments, data, information, etc. may be obtained with the user's consent.

[0312] In addition, each element, each row, or each column in the table of the embodiment of the present disclosure can be implemented as an independent embodiment, and the combination of any elements, any rows, and any columns can also be implemented as an independent embodiment.

[0313] FIG1 is a schematic diagram illustrating the architecture of a communication system according to an embodiment of the present disclosure. As shown in FIG1 , a communication system 100 includes a terminal 101 and a network device 102 .

[0314] In some embodiments, the terminal 101 includes, for example, a mobile phone, a wearable device, an Internet of Things device, a car with communication function, a smart car, a tablet computer, a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control, a wireless terminal device in self-driving, a wireless terminal device in remote medical surgery, a wireless terminal device in a smart grid, a wireless terminal device in transportation safety, a wireless terminal device in a smart city, and at least one of a wireless terminal device in a smart home, but is not limited thereto.

[0315] In some embodiments, the network device 102 is, for example, a node or device that accesses the terminal to a wireless network. The access network device may include an evolved NodeB (eNB), a next generation evolved NodeB (ng-eNB), a next generation NodeB (gNB), a node B (NB), a home node B (HNB), a home evolved nodeB (HeNB), a wireless backhaul device, a radio network controller (RNC), a base station controller (BSC), a base transceiver station (BTS), a base band unit (BBU), a mobile switching center, a base station in a 6G communication system, an open base station (Open RAN), a cloud base station (Cloud RAN), a base station in other communication systems, and at least one of an access node in a Wi-Fi system, but is not limited thereto.

[0316] It can be understood that the communication system described in the embodiment of the present disclosure is for the purpose of more clearly illustrating the technical solution of the embodiment of the present disclosure, and does not constitute a limitation on the technical solution proposed in the embodiment of the present disclosure. Ordinary technicians in this field can know that with the evolution of the system architecture and the emergence of new business scenarios, the technical solution proposed in the embodiment of the present disclosure is also applicable to similar technical problems.

[0317] The following embodiments of the present disclosure may be applied to the communication system 100 shown in FIG1 , or a portion thereof, but are not limited thereto. The entities shown in FIG1 are illustrative only. The communication system may include all or part of the entities shown in FIG1 , or may include other entities outside of FIG1 . The number and form of the entities are arbitrary, and the entities may be physical or virtual. The connection relationships between the entities are illustrative only. The entities may be connected or disconnected, and the connection may be in any manner, including direct or indirect, wired or wireless.

[0318] The embodiments of the present disclosure can be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 5G new radio (NR), future radio access (FRA), new radio access technology (RAT), new radio (NR), new radio access (NX), future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), Public Land Mobile Network (PLMN) networks, Device-to-Device (D2D) systems, Machine-to-Machine (M2M) systems, Internet of Things (IoT) systems, Vehicle-to-Everything (V2X), systems utilizing other communication methods, and next-generation systems based on and extending these methods. Furthermore, multiple systems may be combined (for example, a combination of LTE or LTE-A with 5G).

[0319] In some embodiments, the random access performance of the terminal is improved by improving the downlink coverage of the message. NR (New Radio) supports configuring different PRACH (Physical Random Access Channel) resources for different feature combinations. The feature combination includes at least one of the following: Msg3 retransmission, Msg1 retransmission, RedCap (Reduced capability, performance reduction), Small Data (small packet data), NSAG (Networkslice AS group, network slice automation and service management). The above feature combination reduces the overhead in the random access process, thereby improving the downlink coverage performance of the downlink access information in the network device and improving the random access capability of the terminal.

[0320] In some embodiments, in order to improve the downlink coverage of Msg2 / Msg4 / MsgB, the downlink coverage performance can be improved by retransmitting Msg2 / Msg4 / MsgB. In order to facilitate the network to determine the number of retransmissions of Msg2 / Msg4 / MsgB, the UE needs to report auxiliary information to assist the network in determining the repetition. The auxiliary information may include at least one of the following: downlink signal quality, such as CQI (Channel Quality Indicator) or downlink reference point RSRP (Reference Signal Receiving Power / Reference Signal Received Power); recommended number of retransmissions; UE capability information, which is used to indicate whether the UE supports Msg2 / Msg4 / MsgB retransmission. For example, the terminal may send the auxiliary information through competitive random access request information Msg1 or non-competitive random access request information MsgA.

[0321] Figure 2 is an interactive diagram of a communication method according to an embodiment of the present disclosure. As shown in Figure 2, the embodiment of the present disclosure relates to a communication method, which is executed by a terminal and a network device. The method includes:

[0322] Step S2101: The network device sends RACH configuration to the terminal.

[0323] In some embodiments, the RACH configuration is used to instruct the terminal to report auxiliary information according to the RACH configuration.

[0324] In some embodiments, the auxiliary information includes at least one of the following:

[0325] Downlink signal quality;

[0326] Recommended number of retransmissions;

[0327] Capability information, where the capability information is used to indicate whether the terminal supports retransmission of the first downlink access information.

[0328] In some embodiments, both the terminal and the network device are configured with a direct correspondence between the auxiliary information and the RACH configuration. The terminal uploads the auxiliary information using corresponding RACH configuration resources according to different auxiliary information.

[0329] In some embodiments, the number of retransmissions includes the number of PDCCH retransmissions and / or the number of PDSCH retransmissions. For example, the retransmission of the first downlink access information includes the PDCCH retransmission of Msg2 / Msg4 / MsgB and / or the PDSCH retransmission of Msg2 / Msg4 / MsgB.

[0330] In some embodiments, the RACH configuration includes at least one of the following:

[0331] Dedicated RACH resource configuration information supporting a characteristic combination of the first downlink access information;

[0332] Public RACH resource configuration information supporting a characteristic combination of the first downlink access information.

[0333] For example, the RACH configuration information includes dedicated RACH resource configuration information supporting a feature combination of Msg2 / Msg4 / MsgB and / or public RACH resource configuration information supporting a feature combination of Msg2 / Msg4 / MsgB.

[0334] In some embodiments, the combination of characteristics includes at least one of the following:

[0335] Connection request message Msg3 is retransmitted;

[0336] Contention random access request message Msg1 retransmission;

[0337] Performance reduction RedCap;

[0338] Small packet data, where the data size of the small packet data is smaller than the set size;

[0339] Network Slicing Automation and Service Management NSAG.

[0340] For example, feature combinations are used to increase the portability of communication information during random access and improve the downlink coverage performance of network devices. In the network devices and terminals of this embodiment, feature combinations may include: Msg3 retransmission, Msg1 retransmission, reduced communication performance, small packet data, and NSAG slice communication. This feature combination reduces communication consumption and communication overhead, improves the responsiveness of network devices and terminals, and enhances the coverage performance of network devices.

[0341] In some embodiments, the feature combination includes an information element (IE) information, where the IE information is used to indicate at least one of the following:

[0342] Msg2 retransmission;

[0343] Msg4 retransmission;

[0344] Msg2 and Msg4 are retransmitted;

[0345] Msg2 and MsgB are retransmitted;

[0346] Msg2, Msg4, and MsgB are retransmitted.

[0347] For example, IE (Information element) information is added to the feature combination. The IE information is used to indicate retransmission combinations of multiple downlink access information, such as: Msg2 retransmission, Msg4 retransmission, Msg2+Msg4 retransmission, Msg2+MsgB retransmission, and Msg2+Msg4+MsgB retransmission.

[0348] In some embodiments, the RACH configuration includes indication information, where the indication information is used to indicate at least one of the following:

[0349] The RACH configuration corresponds to the number of retransmissions of the first downlink access information;

[0350] RSRP interval corresponding to the RACH configuration;

[0351] Channel quality indicator CQI interval corresponding to RACH configuration.

[0352] For example, in this embodiment, different RACH resources are configured for different retransmission times / RSRP intervals / CQI intervals. The network device uses indication information to indicate the retransmission times, RSRP intervals, or CQI intervals corresponding to the first downlink access information in the RACH configuration. That is, different RACH configurations correspond to different retransmission times, RSRP intervals, or CQI intervals, and the indication information indicates the RACH configuration corresponding to the current retransmission times, RSRP intervals, or CQI intervals.

[0353] In some embodiments, the feature combination includes IE information, and the IE information includes indication information. For example, in this embodiment, the indication information can be included in the IE information of the preamble corresponding to the feature combination, and the IE information is indicated by the preamble of the feature combination.

[0354] In some embodiments, the network device may configure multiple terminals to have the same feature combination, but the RACH configurations corresponding to the number of retransmissions or RSRP interval or CQI interval under the same feature combination are different.

[0355] In some embodiments, the RACH configuration uses a shared random access opportunity RO configuration and / or a separate RO configuration. For example, the RACH configuration configured by the network device in this embodiment can support sharing the RO configuration with other RACH configurations; or the RACH configuration configured by the network device uses a separate RO configuration.

[0356] In some embodiments, the RACH configuration adopts a shared RO configuration, and the RACH configuration supports at least one of the following:

[0357] A first feature combination, where the first feature combination includes at least one of Msg2 retransmission, Msg4 retransmission, and MsgB retransmission;

[0358] retransmission of the first downlink access information;

[0359] RSRP interval;

[0360] CQI interval;

[0361] The first shared parameter includes at least one of the following:

[0362] Preamble target received power;

[0363] Power increase step size;

[0364] Maximum number of preamble transmissions;

[0365] Response receiving window;

[0366] System synchronization block SSB resource index;

[0367] Supplementary uplink SUL signal strength threshold;

[0368] Preamble start offset;

[0369] Number of preambles;

[0370] Number of leader sequences in group A;

[0371] Power offset value of group B;

[0372] The number of random access preamble sequences available in group A.

[0373] For example, in this embodiment, the RACH configuration shares the RO configuration with other RACH configurations. When the RACH configuration adopts the shared RO configuration, the RACH configuration supports at least one of the following: retransmission of the first downlink access information, RSRP interval, and CQI interval. Or it shares the first shared parameter with other RACH configurations. The first shared parameter includes at least one of the following: preamble target received power, power increase step, maximum number of preamble transmissions, response receive window, system synchronization block SSB resource index, supplementary uplink SUL signal strength threshold, preamble start offset, number of preambles, number of group A preamble sequences, group B power offset value, and number of available random access preamble sequences in group A. The first shared parameter helps to better collaborate and coordinate between terminals and network devices during the network optimization process, ensuring the uniformity and consistency of network performance. The first shared parameter is usually used in radio frequency planning and optimization to ensure that the network coverage, signal quality, interference suppression, etc. can be effectively managed and optimized. By sharing these parameters, corresponding adjustments can be made in their respective areas to improve the performance and coverage of the entire network.

[0374] In some embodiments, the RACH configuration adopts a separate RO configuration, and the RACH configuration supports at least one of the following:

[0375] A first feature combination, where the first feature combination includes at least one of Msg2 retransmission, Msg4 retransmission, and MsgB retransmission;

[0376] The number of retransmissions of the first downlink access information;

[0377] RSRP interval;

[0378] CQI interval;

[0379] The second shared parameter includes at least one of the following:

[0380] Physical random access channel PRACH configuration index;

[0381] Msg1-Frequency Division Multiplexing FDM;

[0382] Msg1 starting frequency;

[0383] Zero correlation area configuration;

[0384] Preamble target received power;

[0385] Maximum number of preamble transmissions;

[0386] Power increase step size;

[0387] Response receiving window;

[0388] Total number of random access RA signaling;

[0389] The number of preamble sequences of the SSB corresponding to the control information block CB and the reference signal power threshold of the SUL frequency band SSB;

[0390] Time threshold for random access contention resolution;

[0391] PRACH root sequence index;

[0392] Msg1 subcarrier spacing;

[0393] Restricted collection configuration;

[0394] Msg3 transform precoder;

[0395] RA access identification priority;

[0396] Number of leader sequences in group A;

[0397] Power offset value of group B;

[0398] The number of random access preamble sequences available in group A.

[0399] For example, the RACH configuration configured by the network device adopts a separate RO configuration, which is not shared with other RACH configurations. The RACH configuration supports a first feature combination, which includes at least one of Msg2 retransmission, Msg4 retransmission, and MsgB retransmission, and the number of retransmissions / RSRP interval / CQI interval of the first downlink access information. Or a second shared parameter is adopted, which includes at least one of the following: PRACH configuration index, Msg1-FDM, Msg1 starting frequency, zero correlation area configuration, preamble target received power, maximum number of preamble transmissions, power increase step, response reception window, total number of RA signaling, number of SSB-CB preamble sequences and reference signal power threshold of SSB in the SUL frequency band, time threshold for random access contention resolution, PRACH root sequence index, Msg1 subcarrier spacing, restricted set configuration, Msg3 transform precoder, RA access identifier priority, number of group A preamble sequences, group B power offset value, and number of available random access preamble sequences in group A. In this embodiment, a separate RO configuration is used to configure RF parameters and optimization strategies for specific network devices or specific coverage areas. For example, for poor areas (areas with extremely poor coverage), high interference areas, or special scenarios (such as high-speed railway coverage, etc.) in the network, separate RF parameter configurations and optimization strategy adjustments can be made for these areas to improve network performance. In this mode, RF parameters such as antenna tilt angles, power control parameters, and neighboring cell definitions are adjusted in a targeted manner according to the needs of specific areas. Through the above-mentioned second shared parameters, different network optimization teams or engineers can work together to ensure that the performance optimization and adjustment of the network are unified and coordinated. Sharing these parameters helps maintain the consistency and synergy of the network, thereby improving the performance of the entire network and user experience.

[0400] In some embodiments, the RACH configuration includes a first RACH resource configuration for a four-step RA procedure and / or a second RACH resource configuration for a two-step RA procedure. For example, the RACH configuration includes a first RACH resource configuration for 4-STER-RA and / or a second RACH resource configuration for 2-STER-RA. 4-STER-RA is a contention-based random access procedure for a terminal, and 2-STER-RA is a non-contention-based random access procedure for a terminal.

[0401] In some embodiments, the RACH configuration includes a first RACH resource configuration, the first RACH resource configuration includes a RACH common configuration, and the RACH common configuration is used to indicate the RACH resource configuration for retransmission of the first downlink access information. For example, in this embodiment, the first RACH resource configuration is a RACH common configuration, and the RACH common configuration is used to indicate the RACH resource configuration for retransmission of the first downlink access information.

[0402] In some embodiments, the RACH configuration includes a second RACH resource configuration, the second RACH resource configuration includes a non-contention random access request information MsgA common configuration, and the MsgA common configuration is used to indicate a RACH resource configuration for retransmitting the first downlink access information. For example, for 4-STER-RA, the first RACH resource configuration indicates a RACH resource configuration for retransmitting the first downlink access information, and the first RACH resource configuration is a RACH common configuration; for 2-STER-RA, the second RACH resource configuration indicates a RACH resource configuration for retransmitting the first downlink access information, and the second RACH resource configuration is an MsgA common configuration.

[0403] In some embodiments, the RACH configuration includes a third RACH resource configuration for contention-based random access (CBRA) and / or a fourth RACH resource configuration for non-contention-based random access (CFRA).

[0404] In some embodiments, the RACH configuration includes a fourth RACH resource configuration, and the CFRA includes a CFRA triggered by the PDCCH protocol. For example, in this embodiment, the RACH configuration is the fourth RACH resource configuration, i.e., the fourth RACH resource configuration is a CFRA configuration, and the CFRA configuration includes a CFRA triggered by the PDCCH protocol. In this case, the RACH configuration can be carried in the PDCCH protocol or in the common RACH configuration.

[0405] In some embodiments, the RACH configuration includes a fourth RACH resource configuration, the CFRA includes a CFRA triggered by a primary / secondary cell change, and the primary / secondary cell change includes at least one of a primary / secondary cell handover, a primary / secondary cell addition, and a primary / secondary cell change. For example, the RACH configuration includes a fourth RACH resource configuration, the fourth RACH resource configuration is CFRA, and the CFRA in this case includes a CFRA triggered by a primary / secondary cell change, and the primary / secondary cell change includes at least one of a primary / secondary cell handover, a primary / secondary cell addition, and a primary / secondary cell change.

[0406] In some embodiments, the fourth RACH resource configuration and the CFRA-RACH configuration of the PRACH transmission adopt a shared RO configuration and / or a separate RO configuration. For example, the fourth RACH resource configuration is a CFRA-RACH configuration, and the configuration information can share the RO with other CFRA-RACH configurations or adopt a separate RO configuration.

[0407] In some embodiments, the fourth RACH resource configuration is carried in the CFRA-IE information and / or the CFRA-2STEP-IE information. For example, the fourth RACH resource configuration is carried in the CFRA-IE information or in the CFRA-2STEP-IE information.

[0408] Optionally, in some embodiments, if the RACH configuration only supports 4-STEP-CFRA, the multiple PRACH-CFRA configurations for switching are limited to not include the CFRA-2STEP configuration.

[0409] In some embodiments, the RACH configuration includes a fourth RACH resource configuration, and the CFRA includes a beam failure recovery (BFR)-triggered CFRA. For example, the RACH configuration is the fourth RACH resource configuration, the fourth RACH resource configuration is a CFRA configuration, and the CFRA configuration includes a BFR-triggered CFRA.

[0410] In some embodiments, the fourth RACH resource configuration includes at least one of the following parameters: BFR root sequence index, preamble target received power, power increase step size, maximum number of preamble transmissions, response reception window, candidate beam reference signal list, RSRP-SSB threshold, RACH-SSB search space configuration, RA-SSB mask index, search space ID for uplink transmission data, RA priority, Msg1 subcarrier spacing, number of retransmissions of the first downlink access information, RSRP interval, and CQI interval. For example, in this embodiment, the fourth RACH resource configuration is a CFRA-RACH configuration, which is used to identify and determine the different carrier frequencies that a wireless communication device can receive. CFRA technology is used to ensure that the optimal carrier frequency can be more intelligently selected during the RACH process, thereby improving access success rate and reducing interference and congestion in the wireless network. This configuration can help optimize wireless network performance and improve the access experience of end users.

[0411] For example, the CFRA-RACH configuration can be configured separately by the primary cell and / or the secondary cell, and can also be included in the subcarrier spacing beam failure recovery configuration and beam failure recovery SCell (primary and secondary cell) configuration information.

[0412] In some embodiments, the RACH configuration includes the third RACH resource configuration, and the third RACH resource configuration includes a CBRA configuration for BFR. For example, the RACH configuration is the third RACH resource configuration, and the third RACH resource configuration is a CBRA-RACH. The CBRA-RACH includes a CBRA configuration triggered by BFR.

[0413] In some embodiments, the third RACH resource configuration includes at least one of the following parameters: a preamble target received power, a power increase step size, a maximum number of preamble transmissions, a response reception window, an RA priority, an RA two-step random access priority, and an Msg1 subcarrier spacing. For example, the CBRA-RACH configuration has the same function as the CFRA-RACH configuration described above, and reference may be made to the above embodiments, which will not be repeated here.

[0414] In some embodiments, the RACH configuration includes a third RACH resource configuration, the third RACH resource configuration includes a CBRA configuration for a primary / secondary cell change, the primary / secondary cell change including at least one of a primary / secondary cell handover, a primary / secondary cell addition, and a primary / secondary cell change. The RACH configuration is the third RACH resource configuration, the third RACH resource configuration is a CBRA-RACH, and the CBRA-RACH includes a CBRA triggered by a primary / secondary cell handover, addition, or change.

[0415] In some embodiments, the third RACH resource configuration includes at least one of the following: a preamble target received power, a power increase step size, a maximum number of preamble transmissions, a response reception window, an RA priority, an RA two-step random access priority, and an Msg1 subcarrier spacing. For example, in this embodiment, the CBRA-RACH is triggered by a change in primary and secondary cells. The CBRA-RACH configuration includes multiple parameters, the functions of which are the same as in the above-mentioned embodiment, and reference can be made to the above-mentioned embodiment, and will not be repeated here.

[0416] In some embodiments, RACH configuration includes RACH resource configuration based on serial interface SI (System Information) requirements. For example, in this embodiment, RACH configuration includes RACH resource configuration information based on SI requirements. RACH resource configuration based on SI requirements refers to the allocation and configuration of RACH resources based on system information requirements in a wireless communication network. System information plays a crucial role in wireless communication networks. It includes essential network parameters, operator information, cell information, frequency band configuration, neighboring cell information, and other information, and is crucial for wireless terminal device access, positioning, and network selection.

[0417] In some embodiments, the RACH resource configuration required by SI is:

[0418] RACH resource configuration corresponding to the SI requirement for the number of retransmissions;

[0419] RSRP interval corresponds to RACH resource configuration of SI requirements;

[0420] The CQI interval corresponds to the RACH resource configuration required by the SI.

[0421] For example, RACH configuration for SI requirements can be configured by retransmission count / RSRP interval / CQI interval. RACH resource configuration for SI requirements includes: RACH scenario parameters, such as RACH common parameters: SSB-RACH scenario; SI request resources, such as: preamble index, RA association period index, RA-SSB-scenario mask index; and SI request period.

[0422] In some embodiments, the RACH configuration includes characteristic priority information of the first downlink access information. For example, the RACH configuration information includes characteristic priority of Msg2 / MsgB / Msg4 retransmissions.

[0423] In some embodiments, the number of retransmissions, RSRP intervals, or CQI intervals under a feature combination have the same priority. For example, different numbers of retransmissions / RSRP intervals / CQI intervals under the same feature combination may have the same priority.

[0424] Step S2102: The terminal sends auxiliary information to the network device according to the RACH configuration.

[0425] For example, in this embodiment, the terminal determines the downlink signal quality of the terminal or recommends the number of retransmissions of the first downlink access information or the retransmission capability of the first downlink access signal based on the RACH configuration sent by the network device. The auxiliary information is generated based on the above information and sent to the network device. The auxiliary information is used to assist the network device in determining the number of retransmissions of the first downlink access information.

[0426] Step S2103: The network device determines the number of retransmissions of the first downlink access information according to the auxiliary information.

[0427] For example, the network device determines the number of retransmissions of the first downlink access information according to the auxiliary information reported by the terminal.

[0428] In some embodiments, the names of information, etc. are not limited to the names described in the embodiments, and terms such as "information", "message", "signal", "signaling", "report", "configuration", "indication", "instruction", "command", "channel", "parameter", "domain", "field", "symbol", "symbol", "codeword", "codebook", "codeword", "codepoint", "bit", "data", "program", and "chip" can be used interchangeably.

[0429] In some embodiments, the terms "codebook," "codeword," and "precoding matrix" may be used interchangeably. For example, a codebook may be a collection of one or more codewords / precoding matrices.

[0430] In some embodiments, terms such as "uplink", "uplink", "physical uplink" can be interchangeable with each other, and terms such as "downlink", "downlink", "physical downlink" can be interchangeable with each other, and terms such as "side", "sidelink", "side communication", "sidelink communication", "direct connection", "direct link", "direct communication", "direct link communication" can be interchangeable with each other.

[0431] In some embodiments, the terms "downlink control information (DCI)", "downlink (DL) assignment", "DL DCI", "uplink (UL) grant", "UL DCI" and the like may be used interchangeably.

[0432] In some embodiments, terms such as "physical downlink shared channel (PDSCH)" and "DL data" can be used interchangeably, and terms such as "physical uplink shared channel (PUSCH)" and "UL data" can be used interchangeably.

[0433] In some embodiments, the terms "radio", "wireless", "radio access network (RAN)", "access network (AN)", "RAN-based" and the like may be used interchangeably.

[0434] In some embodiments, terms such as "synchronization signal (SS)", "synchronization signal block (SSB)", "reference signal (RS)", "pilot", and "pilot signal" can be used interchangeably.

[0435] In some embodiments, terms such as "moment", "time point", "time", and "time position" can be replaced with each other, and terms such as "duration", "period", "time window", "window", and "time" can be replaced with each other.

[0436] In some embodiments, the terms "component carrier (CC)", "cell", "frequency carrier", "carrier frequency" and the like can be used interchangeably.

[0437] In some embodiments, terms such as "resource block (RB)", "physical resource block (PRB)", "sub-carrier group (SCG)", "resource element group (REG)", "PRB pair", "RB pair", "resource element (RE)", and "sub-carrier" can be used interchangeably.

[0438] In some embodiments, "obtain", "get", "get", "receive", "transmit", "bidirectional transmission", "send and / or receive" can be interchangeable, and can be interpreted as receiving from other entities, obtaining from protocols, obtaining from higher layers, obtaining by self-processing, autonomous implementation, etc.

[0439] In some embodiments, terms such as "send", "transmit", "report", "download", "transmit", "bidirectional transmission", "send and / or receive" can be used interchangeably.

[0440] In some embodiments, terms such as "certain", "preseted", "preset", "setting", "indicated", "some", "any", and "first" can be interchangeable. "Specific A", "preset A", "preset A", "setting A", "indicated A", "some A", "any A", and "first A" can be interpreted as A pre-specified in a protocol, etc., or as A obtained through setting, configuration, or indication, etc., or as specific A, some A, any A, or first A, etc., but not limited to this.

[0441] In some embodiments, the determination or judgment can be performed by a value represented by 1 bit (0 or 1), or by a true or false value (Boolean value) represented by true or false, or by comparison of numerical values ​​(for example, comparison with a predetermined value), but is not limited thereto.

[0442] In some embodiments, "not expecting to receive" can be interpreted as not receiving on time domain resources and / or frequency domain resources, or as not performing subsequent processing on the data after receiving it; "not expecting to send" can be interpreted as not sending, or as sending but not expecting the recipient to respond to the content sent.

[0443] Through the above method, the network device sends a random access channel (RACH) configuration to the terminal. The terminal, based on the RACH configuration, sends auxiliary information to the network device. The network device determines the number of retransmissions of first downlink access information based on the auxiliary information. The first downlink access information includes at least one of contention random access response information Msg2, contention resolution information Msg4, and non-contention random access response information MsgB. Thus, by configuring RACH resources for the terminal, the network device ensures effective transmission of the auxiliary information through different RACH resources, compared to when no resources are specified for transmission. Furthermore, the network device determines the number of retransmissions of the downlink access information based on the auxiliary information, thereby improving the downlink coverage performance of the network device.

[0444] FIG3 is a flow chart of a communication method according to an embodiment of the present disclosure. As shown in FIG3 , the embodiment of the present disclosure relates to a communication method, which is executed by a terminal. The method includes:

[0445] Step S3101: Receive a random access channel RACH configuration sent by a network device.

[0446] In some embodiments, the number of retransmissions includes the number of physical downlink control channel PDCCH retransmissions and / or the number of physical downlink shared channel PDSCH retransmissions.

[0447] In some embodiments, the RACH configuration includes at least one of the following:

[0448] Dedicated RACH resource configuration information supporting a characteristic combination of the first downlink access information;

[0449] Common RACH resource configuration information supporting a characteristic combination of the first downlink access information.

[0450] In some embodiments, the combination of characteristics includes at least one of the following:

[0451] Connection request message Msg3 is retransmitted;

[0452] Contention random access request message Msg1 retransmission;

[0453] Performance reduction RedCap;

[0454] Small packet data: the data size of the small packet data is smaller than the set size;

[0455] Network Slicing Automation and Service Management NSAG.

[0456] In some embodiments, the feature combination includes an information element (IE) information, where the IE information is used to indicate at least one of the following:

[0457] Msg2 retransmission;

[0458] Msg4 retransmission;

[0459] Msg2 and Msg4 are retransmitted;

[0460] Msg2 and MsgB are retransmitted;

[0461] Msg2, Msg4, and MsgB are retransmitted.

[0462] In some embodiments, the RACH configuration includes indication information, where the indication information is used to indicate at least one of the following:

[0463] The RACH configuration corresponds to the number of retransmissions of the first downlink access information;

[0464] RSRP interval corresponding to the RACH configuration;

[0465] Channel quality indicator CQI interval corresponding to RACH configuration.

[0466] In some embodiments, the characteristic combination includes IE information, and the IE information includes indication information.

[0467] In some embodiments, the RACH configuration adopts a shared random access opportunity RO configuration and / or a separate RO configuration.

[0468] In some embodiments, the RACH configuration adopts a shared RO configuration, and the RACH configuration supports at least one of the following:

[0469] A first feature combination, where the first feature combination includes at least one of Msg2 retransmission, Msg4 retransmission, and MsgB retransmission;

[0470] The number of retransmissions of the first downlink access information;

[0471] RSRP interval;

[0472] CQI interval;

[0473] The first shared parameter includes at least one of the following:

[0474] Preamble target received power;

[0475] Power increase step size;

[0476] Maximum number of preamble transmissions;

[0477] Response receiving window;

[0478] System synchronization block SSB resource index;

[0479] Supplementary uplink SUL signal strength threshold;

[0480] Preamble start offset;

[0481] Number of preambles;

[0482] Number of leader sequences in group A;

[0483] Power offset value of group B;

[0484] The number of random access preamble sequences available in group A.

[0485] In some embodiments, the RACH configuration adopts a separate RO configuration, and the RACH configuration supports at least one of the following:

[0486] A first feature combination, where the first feature combination includes at least one of Msg2 retransmission, Msg4 retransmission, and MsgB retransmission;

[0487] The number of retransmissions of the first downlink access information;

[0488] RSRP interval;

[0489] CQI interval;

[0490] The second shared parameter includes at least one of the following:

[0491] Physical random access channel PRACH configuration index;

[0492] Msg1-Frequency Division Multiplexing FDM;

[0493] Msg1 starting frequency;

[0494] Zero correlation area configuration;

[0495] Preamble target received power;

[0496] Maximum number of preamble transmissions;

[0497] Power increase step size;

[0498] Response receiving window;

[0499] Total number of random access RA signaling;

[0500] The number of preamble sequences of the SSB corresponding to the control information block CB and the reference signal power threshold of the SUL frequency band SSB;

[0501] Time threshold for random access contention resolution;

[0502] PRACH root sequence index;

[0503] Msg1 subcarrier spacing;

[0504] Restricted collection configuration;

[0505] Msg3 transform precoder;

[0506] RA access identification priority;

[0507] Number of leader sequences in group A;

[0508] Power offset value of group B;

[0509] The number of random access preamble sequences available in group A.

[0510] In some embodiments, the RACH configuration includes a first RACH resource configuration of a four-step RA procedure and / or a second RACH resource configuration of a two-step RA procedure.

[0511] In some embodiments, the RACH configuration includes a first RACH resource configuration, the first RACH resource configuration includes a RACH common configuration, and the RACH common configuration is used to indicate a RACH resource configuration for retransmission of the first downlink access information.

[0512] In some embodiments, the RACH configuration includes a second RACH resource configuration, the second RACH resource configuration includes a common configuration of non-contention random access request information MsgA, and the common configuration of MsgA is used to indicate a RACH resource configuration for retransmission of the first downlink access information.

[0513] In some embodiments, the RACH configuration includes a third RACH resource configuration for contention-based random access (CBRA) and / or a fourth RACH resource configuration for non-contention-based random access (CFRA).

[0514] In some embodiments, the RACH configuration includes a fourth RACH resource configuration, and the fourth RACH resource configuration includes CFRA triggered by the PDCCH protocol.

[0515] In some embodiments, the RACH configuration includes a fourth RACH resource configuration, the fourth RACH resource configuration includes CFRA triggered by a primary / secondary cell change, and the primary / secondary cell change includes at least one of a primary / secondary cell switch, a primary / secondary cell addition, and a primary / secondary cell change.

[0516] In some embodiments, the fourth RACH resource configuration and the CFRA-RACH configuration of the PRACH transmission adopt a shared RO configuration and / or adopt a separate RO configuration.

[0517] In some embodiments, the fourth RACH resource configuration is carried in CFRA-IE information and / or CFRA-Two-Step Procedure-IE information.

[0518] In some embodiments, the RACH configuration includes a fourth RACH resource configuration, and the fourth RACH resource configuration includes CFRA triggered by beam failure recovery (BFR).

[0519] In some embodiments, the fourth RACH resource configuration includes at least one of the following:

[0520] BFR root sequence index;

[0521] Preamble target received power;

[0522] Power increase step size;

[0523] Maximum number of preamble transmissions;

[0524] Response receiving window;

[0525] Candidate beam reference signal list;

[0526] RSRP-SSB threshold;

[0527] RACH-SSB search space configuration;

[0528] RA-SSB mask index;

[0529] Search space ID for uplink transmission data;

[0530] RA priority;

[0531] Msg1 subcarrier spacing;

[0532] The number of retransmissions of the first downlink access information;

[0533] RSRP interval;

[0534] CQI interval.

[0535] In some embodiments, the RACH configuration includes a third RACH resource configuration, and the third RACH resource configuration includes a CBRA configuration of the BFR.

[0536] In some embodiments, the third RACH resource configuration includes at least one of the following:

[0537] Preamble target received power;

[0538] Power increase step size;

[0539] Maximum number of preamble transmissions;

[0540] Response receiving window;

[0541] RA priority;

[0542] RA two-step random access priority;

[0543] Msg1 subcarrier spacing.

[0544] In some embodiments, the RACH configuration includes a third RACH resource configuration, the third RACH resource configuration includes a CBRA configuration for a primary / secondary cell change, and the primary / secondary cell change includes at least one of a primary / secondary cell switch, a primary / secondary cell addition, and a primary / secondary cell change.

[0545] In some embodiments, the third RACH resource configuration includes at least one of the following:

[0546] Preamble target received power;

[0547] Power increase step size;

[0548] Maximum number of preamble transmissions;

[0549] Response receiving window;

[0550] RA priority;

[0551] RA two-step random access priority;

[0552] Msg1 subcarrier spacing.

[0553] In some embodiments, the RACH configuration includes RACH resource configuration required by the serial interface SI.

[0554] In some embodiments, the RACH resource configuration required by SI is:

[0555] RACH resource configuration corresponding to the SI requirement for the number of retransmissions;

[0556] RSRP interval corresponds to RACH resource configuration of SI requirements;

[0557] The CQI interval corresponds to the RACH resource configuration required by the SI.

[0558] In some embodiments, the RACH configuration includes characteristic priority information of the first downlink access information.

[0559] In some embodiments, the number of retransmissions, RSRP intervals, or CQI intervals under a characteristic combination have the same priority.

[0560] In the embodiments of the present disclosure, the relevant implementation method of step S3101 can refer to the embodiment of the aforementioned step S2101 and will not be repeated here.

[0561] Step S3102: Send auxiliary information to the network device according to the RACH configuration, where the auxiliary information is used to instruct the network device to determine the number of retransmissions of the first downlink access information based on the auxiliary information, where the first downlink access information includes at least one of: contention random access response information Msg2, contention resolution information Msg4, and non-contention random access response information MsgB.

[0562] In the embodiments of the present disclosure, the implementation of step S3101 may refer to the embodiment of the aforementioned step S2102 and will not be repeated here.

[0563] Through the above-described method, a random access channel (RACH) configuration sent by a network device is received, and auxiliary information is sent to the network device based on the RACH configuration. The auxiliary information is used to instruct the network device to determine the number of retransmissions of first downlink access information based on the auxiliary information. The first downlink access information includes at least one of contention random access response information Msg2, contention resolution information Msg4, and non-contention random access response information MsgB. Thus, by configuring RACH resources for the terminal, the network device ensures effective transmission of the auxiliary information through different RACH resources, compared to when no resources are determined for transmission. Furthermore, the network device determines the number of retransmissions of the downlink access information based on the auxiliary information, thereby improving the downlink coverage performance of the network device.

[0564] FIG4 is a flow chart of a communication method according to an embodiment of the present disclosure. As shown in FIG4 , the present disclosure embodiment relates to a communication method, which is executed by a network device. The method includes:

[0565] Step S4101: Send RACH configuration to the terminal.

[0566] In some embodiments, the RACH configuration is used to instruct the terminal to send auxiliary information to the network device according to the RACH configuration.

[0567] In some embodiments, the auxiliary information is used to instruct the network device to determine the number of retransmissions of the first downlink access information based on the auxiliary information, and the first downlink access information includes: at least one of: contention random access response information Msg2, contention resolution information Msg4 and non-contention random access response information MsgB.

[0568] In some embodiments, the number of retransmissions includes the number of physical downlink control channel PDCCH retransmissions and / or the number of physical downlink shared channel PDSCH retransmissions.

[0569] In some embodiments, the RACH configuration includes at least one of the following:

[0570] Dedicated RACH resource configuration information supporting a characteristic combination of the first downlink access information;

[0571] Common RACH resource configuration information supporting a characteristic combination of the first downlink access information.

[0572] In some embodiments, the combination of characteristics includes at least one of the following:

[0573] Connection request message Msg3 is retransmitted;

[0574] Contention random access request message Msg1 retransmission;

[0575] Performance reduction RedCap;

[0576] Small packet data: the data size of the small packet data is smaller than the set size;

[0577] Network Slicing Automation and Service Management NSAG.

[0578] In some embodiments, the feature combination includes an information element (IE) information, where the IE information is used to indicate at least one of the following:

[0579] Msg2 retransmission;

[0580] Msg4 retransmission;

[0581] Msg2 and Msg4 are retransmitted;

[0582] Msg2 and MsgB are retransmitted;

[0583] Msg2, Msg4, and MsgB are retransmitted.

[0584] In some embodiments, the RACH configuration includes indication information, where the indication information is used to indicate at least one of the following:

[0585] The RACH configuration corresponds to the number of retransmissions of the first downlink access information;

[0586] RSRP interval corresponding to the RACH configuration;

[0587] Channel quality indicator CQI interval corresponding to RACH configuration.

[0588] In some embodiments, the characteristic combination includes IE information, and the IE information includes indication information.

[0589] In some embodiments, the RACH configuration adopts a shared random access opportunity RO configuration and / or a separate RO configuration.

[0590] In some embodiments, the RACH configuration adopts a shared RO configuration, and the RACH configuration supports at least one of the following:

[0591] A first feature combination, where the first feature combination includes at least one of Msg2 retransmission, Msg4 retransmission, and MsgB retransmission;

[0592] The number of retransmissions of the first downlink access information;

[0593] RSRP interval;

[0594] CQI interval;

[0595] The first shared parameter includes at least one of the following:

[0596] Preamble target received power;

[0597] Power increase step size;

[0598] Maximum number of preamble transmissions;

[0599] Response receiving window;

[0600] System synchronization block SSB resource index;

[0601] Supplementary uplink SUL signal strength threshold;

[0602] Preamble start offset;

[0603] Number of preambles;

[0604] Number of leader sequences in group A;

[0605] Power offset value of group B;

[0606] The number of random access preamble sequences available in group A.

[0607] In some embodiments, the RACH configuration adopts a separate RO configuration, and the RACH configuration supports at least one of the following:

[0608] A first feature combination, where the first feature combination includes at least one of Msg2 retransmission, Msg4 retransmission, and MsgB retransmission;

[0609] The number of retransmissions of the first downlink access information;

[0610] RSRP interval;

[0611] CQI interval;

[0612] The second shared parameter includes at least one of the following:

[0613] Physical random access channel PRACH configuration index;

[0614] Msg1-Frequency Division Multiplexing FDM;

[0615] Msg1 starting frequency;

[0616] Zero correlation area configuration;

[0617] Preamble target received power;

[0618] Maximum number of preamble transmissions;

[0619] Power increase step size;

[0620] Response receiving window;

[0621] Total number of random access RA signaling;

[0622] The number of preamble sequences of the SSB corresponding to the control information block CB and the reference signal power threshold of the SUL frequency band SSB;

[0623] Time threshold for random access contention resolution;

[0624] PRACH root sequence index;

[0625] Msg1 subcarrier spacing;

[0626] Restricted collection configuration;

[0627] Msg3 transform precoder;

[0628] RA access identification priority;

[0629] Number of leader sequences in group A;

[0630] Power offset value of group B;

[0631] The number of random access preamble sequences available in group A.

[0632] In some embodiments, the RACH configuration includes a first RACH resource configuration of a four-step RA procedure and / or a second RACH resource configuration of a two-step RA procedure.

[0633] In some embodiments, the RACH configuration includes a first RACH resource configuration, the first RACH resource configuration includes a RACH common configuration, and the RACH common configuration is used to indicate a RACH resource configuration for retransmission of the first downlink access information.

[0634] In some embodiments, the RACH configuration includes a second RACH resource configuration, the second RACH resource configuration includes a common configuration of non-contention random access request information MsgA, and the common configuration of MsgA is used to indicate a RACH resource configuration for retransmission of the first downlink access information.

[0635] In some embodiments, the RACH configuration includes a third RACH resource configuration for contention-based random access (CBRA) and / or a fourth RACH resource configuration for non-contention-based random access (CFRA).

[0636] In some embodiments, the RACH configuration includes a fourth RACH resource configuration, and the fourth RACH resource configuration includes CFRA triggered by the PDCCH protocol.

[0637] In some embodiments, the RACH configuration includes a fourth RACH resource configuration, the fourth RACH resource configuration includes CFRA triggered by a primary / secondary cell change, and the primary / secondary cell change includes at least one of a primary / secondary cell switching, a primary / secondary cell addition, and a primary / secondary cell change.

[0638] In some embodiments, the fourth RACH resource configuration and the CFRA-RACH configuration of the PRACH transmission adopt a shared RO configuration and / or adopt a separate RO configuration.

[0639] In some embodiments, the fourth RACH resource configuration is carried in CFRA-IE information and / or CFRA-Two-Step Procedure-IE information.

[0640] In some embodiments, the RACH configuration includes a fourth RACH resource configuration, and the fourth RACH resource configuration includes CFRA triggered by beam failure recovery (BFR).

[0641] In some embodiments, the fourth RACH resource configuration includes at least one of the following:

[0642] BFR root sequence index;

[0643] Preamble target received power;

[0644] Power increase step size;

[0645] Maximum number of preamble transmissions;

[0646] Response receiving window;

[0647] Candidate beam reference signal list;

[0648] RSRP-SSB threshold;

[0649] RACH-SSB search space configuration;

[0650] RA-SSB mask index;

[0651] Search space ID for uplink transmission data;

[0652] RA priority;

[0653] Msg1 subcarrier spacing;

[0654] The number of retransmissions of the first downlink access information;

[0655] RSRP interval;

[0656] CQI interval.

[0657] In some embodiments, the RACH configuration includes a third RACH resource configuration, and the third RACH resource configuration includes a CBRA configuration of the BFR.

[0658] In some embodiments, the third RACH resource configuration includes at least one of the following:

[0659] Preamble target received power;

[0660] Power increase step size;

[0661] Maximum number of preamble transmissions;

[0662] Response receiving window;

[0663] RA priority;

[0664] RA two-step random access priority;

[0665] Msg1 subcarrier spacing.

[0666] In some embodiments, the RACH configuration includes a third RACH resource configuration, the third RACH resource configuration includes a CBRA configuration for a primary / secondary cell change, and the primary / secondary cell change includes at least one of a primary / secondary cell switch, a primary / secondary cell addition, and a primary / secondary cell change.

[0667] In some embodiments, the third RACH resource configuration includes at least one of the following:

[0668] Preamble target received power;

[0669] Power increase step size;

[0670] Maximum number of preamble transmissions;

[0671] Response receiving window;

[0672] RA priority;

[0673] RA two-step random access priority;

[0674] Msg1 subcarrier spacing.

[0675] In some embodiments, the RACH configuration includes RACH resource configuration required by the serial interface SI.

[0676] In some embodiments, the RACH resource configuration required by SI is:

[0677] The number of retransmissions corresponds to the RACH resource configuration required by the SI;

[0678] RSRP interval corresponds to RACH resource configuration of SI requirements;

[0679] The CQI interval corresponds to the RACH resource configuration required by the SI.

[0680] In some embodiments, the RACH configuration includes characteristic priority information of the first downlink access information.

[0681] In some embodiments, the number of retransmissions, RSRP intervals, or CQI intervals under a characteristic combination have the same priority.

[0682] In the embodiments of the present disclosure, the relevant implementation method of step S4101 can refer to the embodiment of the aforementioned step S2101 and will not be repeated here.

[0683] Through the above method, the network device transmits a RACH configuration to the terminal. The RACH configuration is used to instruct the terminal to transmit auxiliary information to the network device according to the RACH configuration. The auxiliary information is used to instruct the network device to determine the number of retransmissions of first downlink access information based on the auxiliary information. The first downlink access information includes at least one of contention random access response information Msg2, contention resolution information Msg4, and non-contention random access response information MsgB. Thus, by configuring RACH resources for the terminal, the network device ensures effective transmission of the auxiliary information through different RACH resources, compared to when no resources are determined for transmission. Furthermore, the network device determines the number of retransmissions of the downlink access information based on the auxiliary information, thereby improving the downlink coverage performance of the network device.

[0684] Figure 5 is a flow chart of a communication method according to an embodiment of the present disclosure. As shown in Figure 5, the embodiment of the present disclosure relates to a communication method, which is executed by a terminal. The method includes:

[0685] Step S5101: Receive RACH configuration sent by a network device.

[0686] Step S5102: Send auxiliary information to the network device according to the RACH configuration, where the auxiliary information is used to instruct the network device to determine the number of retransmissions of Msg2 / Msg4 / MsgB according to the auxiliary information.

[0687] In some embodiments, the Msg2 / Msg4 / MsgB retransmission includes Msg2 / Msg4 / MsgB PDCCH retransmission and / or Msg2 / Msg4 / MsgB PDSCH retransmission.

[0688] In some embodiments, the RACH configuration information includes at least one of the following:

[0689] Supports dedicated RACH resource configuration for the feature combination of Msg2 / Msg4 / MsgB;

[0690] Supports common RACH resource configuration for the feature combination of Msg2 / Msg4 / MsgB.

[0691] In some embodiments, IE information is added to the feature combination to indicate at least one of the following information: Msg2 retransmission, Msg4 retransmission, Msg2+Msg4 retransmission, Msg2+MsgB retransmission, Msg2+MsgB+Msg4 retransmission.

[0692] In some embodiments, different RACH resources may be configured for different retransmission times / RSRP intervals / CQI intervals.

[0693] In some embodiments, the RACH configuration information for the number of retransmissions includes indication information for indicating the number of Msg2 / MsgB / Msg4 retransmissions or the RSRP interval / CQI interval corresponding to the RACH configuration. The indication information for the number of retransmissions or the RSRP interval / CQI interval is included in the IE information of the feature combination preamble.

[0694] In some embodiments, the network device may configure multiple RACH configurations with the same feature combination but different Msg2 / MsgB / Msg4 retransmission times / RSRP intervals / CQI intervals.

[0695] In some embodiments, the RACH configuration supports sharing the RO configuration with other RACH configurations, or adopting a separate RO configuration.

[0696] In some embodiments, if the RACH configuration adopts a shared RO configuration, multiple feature combinations (e.g., Msg2 retransmission, Msg4 retransmission, MsgB retransmission, Msg2 / MsgB retransmission) or each retransmission count / RSRP interval / CQI interval configuration or sharing of one or more of the following parameters are supported:

[0697] Preamble target received power;

[0698] Power increase step size;

[0699] Maximum number of preamble transmissions;

[0700] Response receiving window;

[0701] System synchronization block SSB resource index;

[0702] Supplementary uplink SUL signal strength threshold;

[0703] Preamble start offset;

[0704] Number of preambles;

[0705] Number of leader sequences in group A;

[0706] Power offset value of group B;

[0707] The number of random access preamble sequences available in group A.

[0708] In some embodiments, if the RACH configuration adopts a separate RO configuration, multiple feature combinations (e.g., Msg2 retransmission, Msg4 retransmission, MsgB retransmission, Msg2 / MsgB retransmission) or each retransmission count / RSRP interval / CQI interval configuration or sharing of one or more of the following parameters are supported:

[0709] a first feature combination, the first feature combination including at least one of the Msg2 retransmission, the Msg4 retransmission, and the MsgB retransmission;

[0710] the number of retransmissions of the first downlink access information;

[0711] the RSRP interval;

[0712] the CQI interval;

[0713] The second shared parameter includes at least one of the following:

[0714] Physical random access channel PRACH configuration index;

[0715] Msg1-Frequency Division Multiplexing FDM;

[0716] Msg1 starting frequency;

[0717] Zero correlation area configuration;

[0718] Preamble target received power;

[0719] Maximum number of preamble transmissions;

[0720] Power increase step size;

[0721] Response receiving window;

[0722] Total number of random access RA signaling;

[0723] The number of preamble sequences of the SSB corresponding to the control information block CB and the reference signal power threshold of the SUL frequency band SSB;

[0724] Time threshold for random access contention resolution;

[0725] PRACH root sequence index;

[0726] Msg1 subcarrier spacing;

[0727] Restricted collection configuration;

[0728] Msg3 transform precoder;

[0729] RA access identification priority;

[0730] Number of leader sequences in group A;

[0731] Power offset value of group B;

[0732] The number of random access preamble sequences available in group A.

[0733] In some embodiments, the RACH configuration information includes RACH resource configuration of 4-STEP-RA and / or 2-STEP-RA.

[0734] In some embodiments, for 4-STEP-RA, the RACH resource configuration for Msg2 / MsgB / Msg4 retransmission is indicated in RACH-ConfigCommon (common configuration); for 2-STEP-RA, the RACH resource configuration for Msg2 / MsgB / Msg4 retransmission is indicated in MsgA-ConfigCommon (common configuration).

[0735] In some embodiments, the RACH configuration information includes RACH resource configuration of CBRA and / or CFRA.

[0736] In some embodiments, the CFRA includes a PDCCH protocol triggered CFRA.

[0737] In some embodiments, the RACH configuration may be carried in the PDCCH protocol or in a common RACH configuration (RACH-ConfigCommon).

[0738] In some embodiments, the CFRA includes CFRA triggered by HO or PSCell (Primary Secondary Cell) addition / change.

[0739] In some embodiments, the CFRA-RACH configuration may share an RO access opportunity with a CFRA-RACH configuration for single PRACH transmission, or the CFRA-RACH configuration may use a separate RO access opportunity.

[0740] In some embodiments, the CFRA RACH configuration of the multiple PRACH transmissions may multiplex the CFRA RACH configuration of the single PRACH transmission.

[0741] In some embodiments, the CFRA-RACH configuration is carried in the CFRA-IE information and / or the CFRA-2Step-IE information. Optionally, only 4-step CFRA may be supported, and the multi-PRACH-CFRA configuration for switching is limited to not including the CFRA-2Step configuration.

[0742] In some embodiments, the CFRA includes a CFRA triggered by BFR (Beam Failure Recovery).

[0743] In some embodiments, the CFRA-RACH configuration may include at least one of the following parameters:

[0744] BFR root sequence index;

[0745] Preamble target received power;

[0746] Power increase step size;

[0747] Maximum number of preamble transmissions;

[0748] Response receiving window;

[0749] Candidate beam reference signal list;

[0750] RSRP-SSB threshold;

[0751] RACH-SSB search space configuration;

[0752] RA-SSB mask index;

[0753] Search space ID for uplink transmission data;

[0754] RA priority;

[0755] Msg1 subcarrier spacing;

[0756] The number of retransmissions of the first downlink access information;

[0757] RSRP interval;

[0758] CQI interval.

[0759] In some embodiments, the CFRA-RACH configuration may be configured separately for the primary cell and the secondary cell, that is, included in the Beam Failure Recovery Config (subcarrier spacing beam failure recovery configuration) and the Beam Failure Recovery SCell Config (beam failure recovery SCell configuration), respectively.

[0760] In some embodiments, the CBRA configuration may include one or more of the following parameters:

[0761] Preamble target received power;

[0762] Power increase step size;

[0763] Maximum number of preamble transmissions;

[0764] Response receiving window;

[0765] RA priority;

[0766] RA two-step random access priority;

[0767] Msg1 subcarrier spacing.

[0768] In some embodiments, the RACH configuration information includes RACH resource configuration for SI requirements.

[0769] In some embodiments, the RACH resources required by SI can be configured by the number of retransmissions / RSRP interval / CQI interval.

[0770] In some embodiments, the RACH resource configuration required by SI includes: RACH scenario parameters, such as RACH common parameters: SSB-RACH scenario; SI request resources, such as: preamble code index, RA association period index, RA-SSB-scenario mask index; SI request period.

[0771] In some embodiments, the RACH configuration information includes characteristic priority information of Msg2 / MsgB / Msg4 retransmissions.

[0772] In some embodiments, different retransmission times / RSRP intervals / CQI intervals of the same characteristic have the same characteristic priority.

[0773] In the above manner, by configuring RACH resources for the terminal by the network device, compared with no determined resources for transmission, different RACH resources are used to ensure the effective transmission of auxiliary information. Furthermore, the network device determines the number of retransmissions of downlink access information based on the auxiliary information, thereby improving the downlink coverage performance of the network device.

[0774] FIG6 is a schematic diagram of the structure of the terminal proposed in an embodiment of the present disclosure. As shown in FIG6 , the terminal 6100 may include: a first transceiver module 6101 and a first processing module 6102. In some embodiments, the first transceiver module 6101 is configured to receive a random access channel RACH configuration sent by a network device, and the first processing module 6102 is configured to send auxiliary information to the network device according to the RACH configuration, and the auxiliary information is used to instruct the network device to determine the number of retransmissions of the first downlink access information according to the auxiliary information, and the first downlink access information includes: at least one of the contention random access response information Msg2, contention resolution information Msg4 and non-contention random access response information MsgB. Optionally, the transceiver module is used to perform at least one of the communication steps such as sending and / or receiving performed by the terminal 101 in any of the above methods, which will not be repeated here.

[0775] In some embodiments, the first transceiver module 6101 may include a transmitting module and / or a receiving module, and the transmitting module and the receiving module may be separate or integrated. Optionally, the transmitting module and the receiving module may be interchangeable with the transceiver.

[0776] In some embodiments, the first processing module 6102 can be replaced with the execution module.

[0777] FIG7 is a schematic diagram of the structure of a network device proposed in an embodiment of the present disclosure. As shown in FIG7 , the network device 7100 may include: a second transceiver module 7101. In some embodiments, the second transceiver module 7101 is configured to send a RACH configuration to the terminal, and the RACH configuration is used to instruct the terminal to send auxiliary information to the network device according to the RACH configuration, and the auxiliary information is used to instruct the network device to determine the number of retransmissions of the first downlink access information according to the auxiliary information, and the first downlink access information includes: at least one of the contention random access response information Msg2, the contention resolution information Msg4, and the non-contention random access response information MsgB. Optionally, the second transceiver module 7101 is used to perform at least one of the communication steps such as sending and / or receiving performed by the network device 102 in any of the above methods, which will not be repeated here.

[0778] In some embodiments, the second transceiver module 7101 may include a transmitting module and / or a receiving module, and the transmitting module and the receiving module may be separate or integrated. Optionally, the transceiver module may be interchangeable with the transceiver.

[0779] Figure 8 is a schematic diagram of the structure of a communication device 8100 according to an embodiment of the present disclosure. Communication device 8100 can be a network device (e.g., an access network device, a core network device, etc.), a terminal (e.g., a user equipment, etc.), a chip, a chip system, or a processor that supports a network device to implement any of the above methods, or a chip, a chip system, or a processor that supports a terminal to implement any of the above methods. Communication device 8100 can be used to implement the methods described in the above method embodiments. For details, please refer to the description of the above method embodiments.

[0780] As shown in Figure 8, the communication device 8100 includes one or more third processors 8101. The third processor 8101 can be a general-purpose processor or a dedicated processor, for example, a baseband processor or a central processing unit. The baseband processor can be used to process the communication protocol and communication data, and the central processing unit can be used to control the communication device (such as a base station, a baseband chip, a terminal device, a terminal device chip, a DU or a CU, etc.), execute programs, and process program data. Optionally, the communication device 8100 is used to perform any of the above methods. Optionally, one or more third processors 8101 are used to call instructions to cause the communication device 8100 to perform any of the above methods.

[0781] In some embodiments, the communication device 8100 further includes one or more third transceivers 8102. When the communication device 8100 includes one or more third transceivers 8102, the third transceiver 8102 performs at least one of the communication steps, such as sending and / or receiving, in the above method, and the third processor 8101 performs at least one of the other steps. In an optional embodiment, the transceiver may include a receiver and / or a transmitter, and the receiver and transmitter may be separate or integrated. Optionally, the terms transceiver, transceiver unit, transceiver, transceiver circuit, interface circuit, and interface may be interchangeable, the terms transmitter, transmitting unit, transmitter, and transmitting circuit may be interchangeable, and the terms receiver, receiving unit, receiver, and receiving circuit may be interchangeable.

[0782] In some embodiments, the communication device 8100 further includes one or more third memories 8103 for storing data. Alternatively, all or part of the third memories 8103 may be located outside the communication device 8100. In an alternative embodiment, the communication device 8100 may include one or more first interface circuits 8104. Optionally, the first interface circuit 8104 is connected to the third memories 8103. The first interface circuit 8104 may be configured to receive data from the third memories 8103 or other devices, and to send data to the third processor 8101 or other devices. For example, the first interface circuit 8104 may read data stored in the third memories 8103 and send the data to the third processor 8101.

[0783] The communication device 8100 described in the above embodiment may be a network device or a terminal, but the scope of the communication device 8100 described in the present disclosure is not limited thereto, and the structure of the communication device 8100 may not be limited by FIG8 . The communication device may be an independent device or may be part of a larger device. For example, the communication device may be: 1) an independent integrated circuit IC, or a chip, or a chip system or subsystem; (2) a collection of one or more ICs, optionally, the above IC collection may also include a storage component for storing data and programs; (3) an ASIC, such as a modem; (4) a module that can be embedded in other devices; (5) a receiver, a terminal device, an intelligent terminal device, a cellular phone, a wireless device, a handheld device, a mobile unit, an in-vehicle device, a network device, a cloud device, an artificial intelligence device, etc.; (6) others, etc.

[0784] FIG9 is a schematic diagram of the structure of a chip 8200 according to an embodiment of the present disclosure. If the communication device 8100 can be a chip or a chip system, please refer to the schematic diagram of the structure of the chip 8200 shown in FIG9 , but the present invention is not limited thereto.

[0785] The chip 8200 includes one or more fourth processors 8201. The chip 8200 is configured to execute any one of the above methods.

[0786] In some embodiments, the chip 8200 further includes one or more second interface circuits 8202. The terms interface circuit, interface, and transceiver pins are optionally interchangeable. In some embodiments, the chip 8200 further includes one or more fourth memories 8203 for storing data. Optionally, all or part of the fourth memories 8203 may be located external to the chip 8200. Optionally, the second interface circuit 8202 is connected to the fourth memory 8203. The second interface circuit 8202 can be used to receive data from the fourth memory 8203 or other devices, or to send data to the fourth memory 8203 or other devices. For example, the second interface circuit 8202 can read data stored in the fourth memory 8203 and send the data to the fourth processor 8201.

[0787] In some embodiments, the second interface circuit 8202 performs at least one of the communication steps, such as sending and / or receiving, in the above-described method. For example, the second interface circuit 8202 performing the communication steps, such as sending and / or receiving, in the above-described method means that the second interface circuit 8202 performs data exchange between the fourth processor 8201, the chip 8200, the fourth memory 8203, or the transceiver device. In some embodiments, the fourth processor 8201 performs at least one of the other steps.

[0788] The modules and / or devices described in various embodiments, such as virtual devices, physical devices, and chips, can be arbitrarily combined or separated according to circumstances. Optionally, some or all steps can also be performed collaboratively by multiple modules and / or devices, which is not limited here.

[0789] The present disclosure also proposes a storage medium having instructions stored thereon, which, when executed on the communication device 8100, causes the communication device 8100 to execute any of the above methods. Optionally, the storage medium is an electronic storage medium. Optionally, the storage medium is a computer-readable storage medium, but is not limited thereto, and may also be a storage medium readable by other devices. Optionally, the storage medium may be a non-transitory storage medium, but is not limited thereto, and may also be a temporary storage medium.

[0790] The present disclosure also provides a program product, which, when executed by the communication device 8100, enables the communication device 8100 to perform any of the above methods. Optionally, the program product is a computer program product.

[0791] The present disclosure also proposes a computer program, which, when executed on a computer, causes the computer to perform any one of the above methods.

Claims

1. A communication method, characterized in that, Executed by a terminal, the method includes: Receiving a Random Access Channel (RACH) configuration sent by a network device; According to the RACH configuration, sending auxiliary information to the network device, where the auxiliary information is used to indicate to the network device to determine the retransmission times of first downlink access information according to the auxiliary information, and the first downlink access information includes at least one of contention random access response information Msg2, contention resolution information Msg4, and non-contention random access response information MsgB.

2. The method according to claim 1, characterized in that, The retransmission times include the Physical Downlink Control Channel (PDCCH) retransmission times and / or the Physical Downlink Shared Channel (PDSCH) retransmission times.

3. The method according to claim 1, characterized in that, The RACH configuration includes at least one of the following: Dedicated RACH resource configuration information supporting the characteristic combination of the first downlink access information; Common RACH resource configuration information supporting the characteristic combination of the first downlink access information.

4. The method according to claim 3, wherein The characteristic combination includes at least one of the following: Msg3 retransmission of connection request information; Msg1 retransmission of contention random access request information; Reduced Capability (RedCap); Small packet data, where the data size of the small packet data is less than a set size; Network Slice Automation and Service Management (NSAG).

5. The method according to claim 4, wherein The characteristic combination includes Information Element (IE) information, and the IE information is used to indicate at least one of the following: The Msg2 retransmission; The Msg4 retransmission; The Msg2 and Msg4 retransmissions; The Msg2 and MsgB retransmissions; The Msg2, Msg4, and MsgB retransmissions.

6. The method according to claim 3, characterized in that The RACH configuration includes indication information, and the indication information is used to indicate at least one of the following: The retransmission times of the RACH configuration corresponding to the first downlink access information; The Reference Signal Received Power (RSRP) range corresponding to the RACH configuration; The Channel Quality Indicator (CQI) range corresponding to the RACH configuration.

7. The method according to claim 6, wherein The characteristic combination includes IE information, and the IE information includes the indication information.

8. The method according to any one of claims 3-7, characterized in that, The RACH configuration adopts a shared Random Access Opportunity (RO) configuration and / or a separate RO configuration.

9. The method according to claim 8, characterized in that, The RACH configuration adopts the shared RO configuration, and the RACH configuration supports at least one of the following: A first characteristic combination, where the first characteristic combination includes at least one of the Msg2 retransmission, Msg4 retransmission, and MsgB retransmission; The retransmission times of the first downlink access information; The RSRP range; The CQI range; A first shared parameter, where the first shared parameter includes at least one of the following: Preamble target received power; Power increase step size; Maximum number of preamble transmissions; Response reception window; System Synchronization Block (SSB) resource index; Supplementary Uplink (SUL) signal strength threshold; Preamble start offset; Number of preambles; Number of preamble sequences in group A; Power offset value of group B; Number of available random access preamble sequences in group A.

10. The method according to claim 8, characterized in that, The RACH configuration adopts the separate RO configuration, and the RACH configuration supports at least one of the following: A first characteristic combination, where the first characteristic combination includes at least one of the Msg2 retransmission, Msg4 retransmission, and MsgB retransmission; The retransmission times of the first downlink access information; RSRP range; CQI range; The second shared parameter, which includes at least one of the following: Physical Random Access Channel (PRACH) configuration index; Msg1 - Frequency Division Multiplexing (FDM); Msg1 starting frequency; Zero - correlation zone configuration; Preamble target received power; Preamble maximum transmission times; Power increase step size; Response reception window; Total number of Random Access (RA) signaling; The number of preamble sequences of the control information block (CB) corresponding to the Synchronization Signal Block (SSB) and the reference signal power threshold of the SSB in the Supplemental UpLink (SUL) band; Time threshold for random access contention resolution; PRACH root sequence index; Msg1 sub - carrier spacing; Restricted set configuration; Msg3 transform precoder; RA access identity priority; Number of preamble sequences in group A; Power offset value of group B; Number of available random access preamble sequences in group A.

11. The method according to claim 1, wherein, The RACH configuration includes the first RACH resource configuration of the four - step RA process and / or the second RACH resource configuration of the two - step RA process.

12. The method according to claim 11, wherein The RACH configuration includes the first RACH resource configuration, and the first RACH resource configuration includes a RACH common configuration, and the RACH common configuration is used to indicate the RACH resource configuration for retransmission of the first downlink access information.

13. The method according to claim 11, characterized in that The RACH configuration includes the second RACH resource configuration, and the second RACH resource configuration includes a non - competitive random access request message MsgA common configuration, and the MsgA common configuration is used to indicate the RACH resource configuration for retransmission of the first downlink access information.

14. The method according to claim 1, characterized in that The RACH configuration includes the third RACH resource configuration of the contention - based random access (CBRA) and / or the fourth RACH resource configuration of the non - contention random access (CFRA).

15. The method according to claim 14, characterized in that, The RACH configuration includes the fourth RACH resource configuration, and the fourth RACH resource configuration includes the CFRA triggered by the Physical Downlink Control Channel (PDCCH) protocol.

16. The method according to claim 14, wherein The RACH configuration includes the fourth RACH resource configuration, and the fourth RACH resource configuration includes the CFRA triggered by the primary and secondary cell change, and the primary and secondary cell change includes at least one of primary and secondary cell handover, primary and secondary cell addition, and primary and secondary cell change.

17. The method according to claim 15 or 16, characterized in that, The fourth RACH resource configuration and the CFRA - RACH configuration for PRACH transmission adopt a shared RO configuration and / or adopt a separate RO configuration.

18. The method according to claim 17, wherein The fourth RACH resource configuration is carried in the CFRA - IE information and / or the CFRA - two - step process - IE information.

19. The method according to claim 14, wherein The RACH configuration includes the fourth RACH resource configuration, and the fourth RACH resource configuration includes the CFRA triggered by Beam Failure Recovery (BFR).

20. The method according to claim 17, wherein The fourth RACH resource configuration includes at least one of the following: BFR root sequence index; Preamble target received power; Power increase step size; Preamble maximum transmission times; Response reception window; Candidate beam reference signal list; RSRP - SSB threshold; RACH - SSB search space configuration; RA - SSB mask index; Search space ID for uplink transmission data; RA priority; Msg1 sub - carrier spacing; Retransmission times of the first downlink access information RSRP range CQI range 21. The method according to claim 14, wherein The RACH configuration includes the third RACH resource configuration, and the third RACH resource configuration includes the CBRA configuration of BFR 22. The method according to claim 21, wherein The third RACH resource configuration includes at least one of the following Preamble target received power Power increment step size Maximum number of preamble transmissions Response reception window RA priority RA two-step random access priority Msg1 subcarrier spacing 23. The method according to claim 14, characterized in that, The RACH configuration includes the third RACH resource configuration, and the third RACH resource configuration includes the CBRA configuration for primary and secondary cell change, and the primary and secondary cell change includes at least one of primary and secondary cell handover, primary and secondary cell addition, and primary and secondary cell change 24. The method according to claim 23, wherein The third RACH resource configuration includes at least one of the following Preamble target received power Power increment step size Maximum number of preamble transmissions Response reception window RA priority RA two-step random access priority Msg1 subcarrier spacing 25. The method according to claim 1, wherein The RACH configuration includes the RACH resource configuration required by the serial interface SI 26. The method according to claim 25, wherein The RACH resource configuration required by the SI Retransmission times corresponding to the RACH resource configuration required by the SI RSRP range corresponding to the RACH resource configuration required by the SI CQI range corresponding to the RACH resource configuration required by the SI 27. The method according to claim 3, characterized in that, The RACH configuration includes the characteristic priority information of the first downlink access information 28. The method according to claim 27, wherein The retransmission times, RSRP range or CQI range under the characteristic combination have the same priority 29. A communication method, characterized in that, Executed by a network device, the method includes Sending a RACH configuration to a terminal, the RACH configuration is used to instruct the terminal to send auxiliary information to the network device according to the RACH configuration, and the auxiliary information is used to instruct the network device to determine the retransmission times of the first downlink access information according to the auxiliary information. The first downlink access information includes at least one of contention random access response information Msg2, contention resolution information Msg4, and non-contention random access response information MsgB 30. The method according to claim 29, characterized in that The retransmission times include the physical downlink control channel PDCCH retransmission times and / or the physical downlink shared channel PDSCH retransmission times 31. The method according to claim 29, wherein The RACH configuration includes at least one of the following Dedicated RACH resource configuration information supporting the characteristic combination of the first downlink access information Common RACH resource configuration information supporting the characteristic combination of the first downlink access information 32. The method according to claim 31, wherein The characteristic combination includes at least one of the following Msg3 retransmission of connection request information Msg1 retransmission of contention random access request information Reduced performance RedCap Small packet data, and the data size of the small packet data is less than the set size Network slice automation and service management NSAG 33. The method according to claim 32, wherein The characteristic combination includes information element IE information, and the IE information is used to indicate at least one of the following The Msg2 retransmission The Msg4 retransmission The Msg2 and the Msg4 retransmission The Msg2 and the MsgB retransmission The Msg2, the Msg4 and the MsgB retransmission 34. The method according to claim 31, wherein The RACH configuration includes indication information, and the indication information is used to indicate at least one of the following: The retransmission times of the RACH configuration corresponding to the first downlink access information; The reference signal received power (RSRP) range corresponding to the RACH configuration; The channel quality indicator (CQI) range corresponding to the RACH configuration.

35. The method according to claim 34, characterized in that, The characteristic combination includes IE information, and the IE information includes the indication information.

36. The method according to any one of claims 30 - 34, characterized in that, The RACH configuration adopts a shared random access opportunity (RO) configuration and / or a separate RO configuration.

37. The method according to claim 36, wherein The RACH configuration adopts the shared RO configuration, and the RACH configuration supports at least one of the following: A first characteristic combination, which includes at least one of Msg2 retransmission, Msg4 retransmission, and MsgB retransmission; The retransmission times of the first downlink access information; RSRP range; CQI range; A first shared parameter, and the shared parameter includes at least one of the following: The target received power of the preamble; The power increment step; The maximum transmission times of the preamble; The response reception window; The system synchronization block (SSB) resource index; The supplementary uplink (SUL) signal strength threshold; The starting offset of the preamble; The number of preambles; The number of preamble sequences in group A; The power offset value of group B; The number of available random access preamble sequences in group A.

38. The method according to claim 36, wherein The RACH configuration adopts the separate RO configuration, and the RACH configuration supports at least one of the following: A first characteristic combination, which includes at least one of Msg2 retransmission, Msg4 retransmission, and MsgB retransmission; The retransmission times of the first downlink access information; RSRP range; CQI range; A second shared parameter, and the shared parameter includes at least one of the following: The physical random access channel (PRACH) configuration index; Msg1 - frequency division multiplexing (FDM); The starting frequency of Msg1; The zero - correlation zone configuration; The target received power of the preamble; The maximum transmission times of the preamble; The power increment step; The response reception window; The total number of random access (RA) signaling; The number of preamble sequences corresponding to the control information block (CB) of SSB and the reference signal power threshold of the SSB in the SUL band; The time threshold for random access contention resolution; The PRACH root sequence index; The sub - carrier spacing of Msg1; The restricted set configuration; The Msg3 transformation precoder; The RA access identity priority; The number of preamble sequences in group A; The power offset value of group B; The number of available random access preamble sequences in group A.

39. The method according to claim 29, wherein The RACH configuration includes the first RACH resource configuration for the four - step RA process and / or the second RACH resource configuration for the two - step RA process.

40. The method according to claim 39, characterized in that, The RACH configuration includes the first RACH resource configuration, and the first RACH resource configuration includes a RACH common configuration, and the RACH common configuration is used to indicate the RACH resource configuration for the retransmission of the first downlink access information.

41. The method according to claim 39, wherein The RACH configuration includes the second RACH resource configuration, and the second RACH resource configuration includes a non - contention random access request information MsgA common configuration, and the MsgA common configuration is used to indicate the RACH resource configuration for the retransmission of the first downlink access information.

42. The method according to claim 39, wherein The RACH configuration includes a third RACH resource configuration for contention-based random access (CBRA) and / or a fourth RACH resource configuration for contention-free random access (CFRA).

43. The method according to claim 42, characterized in that, The RACH configuration includes the fourth RACH resource configuration, and the CFRA includes CFRA triggered by a PDCCH protocol.

44. The method according to claim 42, wherein The RACH configuration includes the fourth RACH resource configuration, and the CFRA includes CFRA triggered by primary-secondary cell change, where the primary-secondary cell change includes at least one of primary-secondary cell handover, primary-secondary cell addition, and primary-secondary cell change.

45. The method according to claim 43 or 44, characterized in that, The fourth RACH resource configuration and the CFRA-RACH configuration for PRACH transmission adopt a shared RO configuration and / or an independent RO configuration.

46. The method according to claim 45, characterized in that, The fourth RACH resource configuration is carried in CFRA-IE information and / or CFRA-two-step procedure-IE information.

47. The method according to claim 42, wherein The RACH configuration includes the fourth RACH resource configuration, and the CFRA includes CFRA triggered by beam failure recovery (BFR).

48. The method according to claim 45, wherein The fourth RACH resource configuration includes at least one of the following: BFR root sequence index; Preamble target received power; Power increase step size; Maximum number of preamble transmissions; Response reception window; Candidate beam reference signal list; RSRP-SSB threshold; RACH-SSB search space configuration; RA-SSB mask index; Search space ID for uplink transmission data; RA priority; Msg1 subcarrier spacing; Number of retransmissions of the first downlink access information; RSRP range; CQI range.

49. The method according to claim 42, wherein The RACH configuration includes the third RACH resource configuration, and the third RACH resource configuration includes a CBRA configuration for BFR.

50. The method according to claim 49, wherein The third RACH resource configuration includes at least one of the following: Preamble target received power; Power increase step size; Maximum number of preamble transmissions; Response reception window; RA priority; RA two-step random access priority; Msg1 subcarrier spacing.

51. The method according to claim 42, characterized in that, The RACH configuration includes the third RACH resource configuration, and the third RACH resource configuration includes a CBRA configuration for primary-secondary cell change, where the primary-secondary cell change includes at least one of primary-secondary cell handover, primary-secondary cell addition, and primary-secondary cell change.

52. The method according to claim 51, wherein The third RACH resource configuration includes at least one of the following: Preamble target received power; Power increase step size; Maximum number of preamble transmissions; Response reception window; RA priority; RA two-step random access priority; Msg1 subcarrier spacing.

53. The method according to claim 29, characterized in that, The RACH configuration includes a RACH resource configuration required by a serial interface (SI).

54. The method according to claim 53, characterized in that, The RACH resource configuration required by the SI: Number of retransmissions corresponding to the RACH resource configuration required by the SI; RSRP range corresponding to the RACH resource configuration required by the SI; CQI range corresponding to the RACH resource configuration required by the SI.

55. The method according to claim 31, wherein, The RACH configuration includes the characteristic priority information of the first downlink access information.

56. The method according to claim 55, wherein The number of retransmissions, RSRP range, or CQI range under the characteristic combination has the same priority.

57. A communication method, characterized in that, The method includes: A network device sends a RACH configuration to a terminal; The terminal sends auxiliary information to the network device according to the RACH configuration; The network device determines the retransmission times of the first downlink access information according to the auxiliary information, where the first downlink access information includes at least one of contention random access response information Msg2, contention resolution information Msg4, and non-contention random access response information MsgB.

58. A terminal, characterized in that, Including: A first transceiver module, configured to receive a random access channel (RACH) configuration sent by a network device; A first processing module, configured to send auxiliary information to the network device according to the RACH configuration, where the auxiliary information is used to instruct the network device to determine the retransmission times of the first downlink access information according to the auxiliary information, and the first downlink access information includes at least one of contention random access response information Msg2, contention resolution information Msg4, and non-contention random access response information MsgB.

59. A network device, characterized in that, Including: A second transceiver module, configured to send an RACH configuration to a terminal, where the RACH configuration is used to instruct the terminal to send auxiliary information to the network device according to the RACH configuration, and the auxiliary information is used to instruct the network device to determine the retransmission times of the first downlink access information according to the auxiliary information, and the first downlink access information includes at least one of contention random access response information Msg2, contention resolution information Msg4, and non-contention random access response information MsgB.

60. A terminal, characterized in that, Including: One or more processors; Wherein, the terminal is used to execute the communication method according to any one of claims 1-28.

61. A network device, characterized in that, Including: One or more processors; Wherein, the network device is used to execute the communication method according to any one of claims 29-56.

62. A communication system, characterized in that, Including a terminal and a network device, wherein the terminal is configured to implement the communication method according to any one of claims 1-28, and the network device is configured to implement the communication method according to any one of claims 29-56.

63. A storage medium, the storage medium stores instructions, characterized in that, When the instruction runs on the communication device, it causes the communication device to execute the communication method according to any one of claims 1-28, or causes the communication device to execute the communication method according to any one of claims 29-56.

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