Downlink service channel enhancement method and apparatus in random access process

Abstract

Provided in the embodiments of the present disclosure are a downlink service channel enhancement method and apparatus in a random access process. The method applied to a terminal comprises: determining to repeat message 4 (Msg4) transmission; and sending to a network side a Msg4 repetition request, wherein the Msg4 repetition request is used for requesting the network side for repeatedly sending Msg4.

Description

Downlink service channel enhancement method and device during random access process

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This disclosure claims priority to Chinese patent application No. 202310756415.0, filed on June 25, 2023, entitled “Method and device for enhancing downlink service channels in random access process,” which is incorporated herein by reference in its entirety. Technical Field

[0003] The present disclosure relates to the field of communication technology, and in particular to a method and device for enhancing a downlink service channel in a random access process. Background Art

[0004] In response to receiving a Physical Downlink Shared Channel (PDSCH) message containing a User Equipment (UE) contention resolution indicator (i.e., receiving Message 4), the UE must transmit a Hybrid Automatic Repeat Request Acknowledgement (HARQ-ACK) message on the Physical Uplink Control Channel (PUCCH). If the base station does not receive a positive ACK, it will re-initiate random access. Simulation results from current related technologies show that, ignoring satellite power constraints, the link margin of Message 4 (Msg4) is approximately 3.3 to 6.2 dB.

[0005] However, due to the actual satellite power limitation, insufficient link budget and other reasons, the link margin may be insufficient, and the UE cannot correctly receive Msg4. It can only re-initiate random access, which increases the access delay and reduces the access efficiency.

[0006] Summary of the Invention

[0007] The embodiments of the present disclosure provide a method and apparatus for enhancing a downlink service channel during a random access process, so as to solve the defect in the prior art of low access efficiency caused by the inability of a UE to correctly receive Msg4, and thereby improve UE access efficiency.

[0008] In a first aspect, an embodiment of the present disclosure provides a method for enhancing a downlink traffic channel in a random access process, applied to a terminal, including:

[0009] Determine to repeat transmission of message 4Msg4;

[0010] Send a Msg4 repeat request to the network side, where the Msg4 repeat request is used to request the network side to repeatedly send Msg4.

[0011] Optionally, the determining to perform repeated transmission of Msg4 includes:

[0012] Measure reference signal received power RSRP;

[0013] When the RSRP is lower than the RSRP threshold configured on the network side, it is determined to perform repeated transmission of Msg4.

[0014] Optionally, the sending of the Msg4 repeat request to the network side includes:

[0015] Indicating the Msg4 repeat request by sending a Msg1 using a dedicated random access resource, the dedicated random access resource being associated with the Msg4 repeat request; or

[0016] The request indication information is sent through message 3Msg3, where the request indication information is used to instruct the Msg4 to repeat the request.

[0017] Optionally, the dedicated random access resource includes at least one of the following: a preamble code type, a time domain resource, or a frequency domain resource.

[0018] Optionally, the method further includes:

[0019] Receive the number of repetitions of Msg4 sent by the network side;

[0020] Receive the Msg4 sent by the network side according to the number of repetitions of the Msg4.

[0021] Optionally, the receiving, according to the number of repetitions of the Msg4, the Msg4 sent by the network side includes:

[0022] Determining at least one time-frequency domain resource according to the number of repetitions of the Msg4;

[0023] On the at least one time-frequency domain resource, receive Msg4 sent by the network side.

[0024] Optionally, the number of repetitions of Msg4 is indicated by the first bit field in downlink control information DCI;

[0025] The receiving the number of repetitions of Msg4 sent by the network side includes:

[0026] Receiving the DCI sent by the network side through a physical downlink control channel PDCCH scrambled by a random access radio network temporary identifier RA-RNTI; or

[0027] The DCI is received from the network side through a physical downlink control channel PDCCH scrambled by a temporary cell radio network temporary identifier TC-RNTI.

[0028] Optionally, the first bit field is used to indicate the number of Msg4 repetitions in the candidate Msg4 repetition number; or

[0029] The bit value of the first bit field is associated with a preset number of repetitions of Msg4.

[0030] Optionally, the first bit field is an extended DCI bit field, a DCI reserved bit field, or the upper 2 bits of a DCI modulation and coding scheme MCS.

[0031] Optionally, the method further includes:

[0032] A plurality of redundancy versions are received, and the plurality of redundancy versions are merged.

[0033] In a second aspect, an embodiment of the present disclosure provides a method for enhancing a downlink traffic channel during a random access process, which is applied to a network side and includes:

[0034] A Msg4 repeat request of message 4 sent by a receiving terminal, wherein the Msg4 repeat request is used to request repeated sending of Msg4;

[0035] Based on the Msg4 repetition request, Msg4 is sent to the terminal.

[0036] Optionally, the receiving the Msg4 repeat request sent by the terminal includes:

[0037] receiving a message 1 Msg1 sent by the terminal, and determining, when a resource used by the terminal to send the Msg1 is a dedicated random access resource, that the terminal requests to repeatedly send Msg4, the dedicated random access resource being associated with the Msg4 repetition request; or

[0038] Receive message 3 Msg3 sent by the terminal, and determine, based on the request indication information carried in Msg3, that the terminal requests to repeatedly send Msg4.

[0039] Optionally, the dedicated random access resource includes at least one of the following: a preamble code type, a time domain resource, or a frequency domain resource.

[0040] Optionally, the sending Msg4 to the terminal based on the Msg4 repeat request includes:

[0041] Determining the number of Msg4 repetitions based on the Msg4 repetition request;

[0042] Sending Msg4 to the terminal on at least one time-frequency domain resource according to the number of repetitions of Msg4.

[0043] Optionally, the method further includes:

[0044] Send the Msg4 repetition number to the terminal.

[0045] Optionally, the number of repetitions of Msg4 is indicated by the first bit field in downlink control information DCI;

[0046] The sending of the Msg4 repetition number to the terminal includes:

[0047] Sending the DCI to the terminal via a physical downlink control channel PDCCH scrambled by a random access radio network temporary identifier RA-RNTI; or

[0048] The DCI is sent to the terminal through a physical downlink control channel PDCCH scrambled by a temporary cell-radio network temporary identifier TC-RNTI.

[0049] Optionally, the first bit field is used to indicate the number of Msg4 repetitions in the candidate Msg4 repetition number; or

[0050] The bit value of the first bit field is associated with a preset number of repetitions of Msg4.

[0051] Optionally, the first bit field is an extended DCI bit field, a DCI reserved bit field, or the upper 2 bits of a DCI modulation and coding scheme MCS.

[0052] Optionally, the method further includes:

[0053] A plurality of redundancy versions are sent to the terminal.

[0054] Optionally, the method further includes:

[0055] A reference signal received power (RSRP) threshold is sent to the terminal, where the RSRP threshold is used by the terminal to determine whether to repeatedly transmit Msg4.

[0056] In a third aspect, an embodiment of the present disclosure further provides a terminal, including a memory, a transceiver, and a processor, wherein:

[0057] A memory for storing a computer program; a transceiver for transmitting and receiving data under the control of the processor; and a processor for reading the computer program in the memory and performing the following operations:

[0058] Determine to repeat transmission of message 4Msg4;

[0059] Send a Msg4 repeat request to the network side, where the Msg4 repeat request is used to request the network side to repeatedly send Msg4.

[0060] Optionally, the determining to perform repeated transmission of Msg4 includes:

[0061] Measure reference signal received power RSRP;

[0062] When the RSRP is lower than the RSRP threshold configured on the network side, it is determined to perform repeated transmission of Msg4.

[0063] Optionally, the sending of the Msg4 repeat request to the network side includes:

[0064] Indicating the Msg4 repeat request by sending a Msg1 using a dedicated random access resource, the dedicated random access resource being associated with the Msg4 repeat request; or

[0065] The request indication information is sent through message 3Msg3, where the request indication information is used to instruct the Msg4 to repeat the request.

[0066] Optionally, the dedicated random access resource includes at least one of the following: a preamble code type, a time domain resource, or a frequency domain resource.

[0067] Optionally, the operation further includes:

[0068] Receive the number of repetitions of Msg4 sent by the network side;

[0069] Receive the Msg4 sent by the network side according to the number of repetitions of the Msg4.

[0070] Optionally, the receiving, according to the number of repetitions of the Msg4, the Msg4 sent by the network side includes:

[0071] Determining at least one time-frequency domain resource according to the number of repetitions of the Msg4;

[0072] On the at least one time-frequency domain resource, receive Msg4 sent by the network side.

[0073] Optionally, the number of repetitions of Msg4 is indicated by the first bit field in downlink control information DCI;

[0074] The receiving the number of repetitions of Msg4 sent by the network side includes:

[0075] Receiving the DCI sent by the network side through a physical downlink control channel PDCCH scrambled by a random access radio network temporary identifier RA-RNTI; or

[0076] The DCI is received from the network side through a physical downlink control channel PDCCH scrambled by a temporary cell radio network temporary identifier TC-RNTI.

[0077] Optionally, the first bit field is used to indicate the number of Msg4 repetitions in the candidate Msg4 repetition number; or

[0078] The bit value of the first bit field is associated with a preset number of repetitions of Msg4.

[0079] Optionally, the first bit field is an extended DCI bit field, a DCI reserved bit field, or the upper 2 bits of a DCI modulation and coding scheme MCS.

[0080] Optionally, the operation further includes:

[0081] A plurality of redundancy versions are received, and the plurality of redundancy versions are merged.

[0082] In a fourth aspect, an embodiment of the present disclosure further provides a network device, including a memory, a transceiver, and a processor, wherein:

[0083] A memory for storing a computer program; a transceiver for transmitting and receiving data under the control of the processor; and a processor for reading the computer program in the memory and performing the following operations:

[0084] A Msg4 repeat request of message 4 sent by a receiving terminal, wherein the Msg4 repeat request is used to request repeated sending of Msg4;

[0085] Based on the Msg4 repetition request, Msg4 is sent to the terminal.

[0086] Optionally, the receiving the Msg4 repeat request sent by the terminal includes:

[0087] receiving a message 1 Msg1 sent by the terminal, and determining, when a resource used by the terminal to send the Msg1 is a dedicated random access resource, that the terminal requests to repeatedly send Msg4, the dedicated random access resource being associated with the Msg4 repetition request; or

[0088] Receive message 3 Msg3 sent by the terminal, and determine, based on the request indication information carried in Msg3, that the terminal requests to repeatedly send Msg4.

[0089] Optionally, the dedicated random access resource includes at least one of the following: a preamble code type, a time domain resource, or a frequency domain resource.

[0090] Optionally, the sending Msg4 to the terminal based on the Msg4 repeat request includes:

[0091] Determining the number of Msg4 repetitions based on the Msg4 repetition request;

[0092] Sending Msg4 to the terminal on at least one time-frequency domain resource according to the number of repetitions of Msg4.

[0093] Optionally, the operation further includes:

[0094] Send the Msg4 repetition number to the terminal.

[0095] Optionally, the number of repetitions of Msg4 is indicated by the first bit field in downlink control information DCI;

[0096] The sending of the Msg4 repetition number to the terminal includes:

[0097] Sending the DCI to the terminal via a physical downlink control channel PDCCH scrambled by a random access radio network temporary identifier RA-RNTI; or

[0098] The DCI is sent to the terminal through a physical downlink control channel PDCCH scrambled by a temporary cell-radio network temporary identifier TC-RNTI.

[0099] Optionally, the first bit field is used to indicate the number of Msg4 repetitions in the candidate Msg4 repetition number; or

[0100] The bit value of the first bit field is associated with a preset number of repetitions of Msg4.

[0101] Optionally, the first bit field is an extended DCI bit field, a DCI reserved bit field, or the upper 2 bits of a DCI modulation and coding scheme MCS.

[0102] Optionally, the operation further includes:

[0103] A plurality of redundancy versions are sent to the terminal.

[0104] Optionally, the operation further includes:

[0105] A reference signal received power (RSRP) threshold is sent to the terminal, where the RSRP threshold is used by the terminal to determine whether to repeatedly transmit Msg4.

[0106] In a fifth aspect, an embodiment of the present disclosure further provides a downlink traffic channel enhancement device during a random access process, which is applied to a terminal and includes:

[0107] a transmission determination unit, configured to determine repeated transmission of message 4 Msg4;

[0108] The request sending unit is used to send a Msg4 repeat request to the network side, where the Msg4 repeat request is used to request the network side to repeatedly send Msg4.

[0109] Optionally, the determining to perform repeated transmission of Msg4 includes:

[0110] Measure reference signal received power RSRP;

[0111] When the RSRP is lower than the RSRP threshold configured on the network side, it is determined to perform repeated transmission of Msg4.

[0112] Optionally, the sending of the Msg4 repeat request to the network side includes:

[0113] Indicating the Msg4 repeat request by sending a Msg1 using a dedicated random access resource, the dedicated random access resource being associated with the Msg4 repeat request; or

[0114] The request indication information is sent through message 3Msg3, where the request indication information is used to instruct the Msg4 to repeat the request.

[0115] Optionally, the dedicated random access resource includes at least one of the following: a preamble code type, a time domain resource, or a frequency domain resource.

[0116] Optionally, the device further includes a first receiving unit, wherein the first receiving unit is configured to:

[0117] Receive the number of repetitions of Msg4 sent by the network side;

[0118] Receive the Msg4 sent by the network side according to the number of repetitions of the Msg4.

[0119] Optionally, the receiving, according to the number of repetitions of the Msg4, the Msg4 sent by the network side includes:

[0120] Determining at least one time-frequency domain resource according to the number of repetitions of the Msg4;

[0121] On the at least one time-frequency domain resource, receive Msg4 sent by the network side.

[0122] Optionally, the number of repetitions of Msg4 is indicated by the first bit field in downlink control information DCI;

[0123] The receiving the number of repetitions of Msg4 sent by the network side includes:

[0124] Receiving the DCI sent by the network side through a physical downlink control channel PDCCH scrambled by a random access radio network temporary identifier RA-RNTI; or

[0125] The DCI is received from the network side through a physical downlink control channel PDCCH scrambled by a temporary cell radio network temporary identifier TC-RNTI.

[0126] Optionally, the first bit field is used to indicate the number of Msg4 repetitions in the candidate Msg4 repetition number; or

[0127] The bit value of the first bit field is associated with a preset number of repetitions of Msg4.

[0128] Optionally, the first bit field is an extended DCI bit field, a DCI reserved bit field, or the upper 2 bits of a DCI modulation and coding scheme MCS.

[0129] Optionally, the device further includes: a redundant version processing unit, configured to receive multiple redundant versions and merge the multiple redundant versions.

[0130] In a sixth aspect, an embodiment of the present disclosure further provides a downlink traffic channel enhancement device in a random access process, which is applied to a network side and includes:

[0131] a request receiving unit, configured to receive a message 4 Msg4 repeat request sent by a terminal, wherein the Msg4 repeat request is used to request repeated sending of Msg4;

[0132] The Msg4 sending unit is configured to send Msg4 to the terminal based on the Msg4 repeat request.

[0133] Optionally, the receiving the Msg4 repeat request sent by the terminal includes:

[0134] receiving a message 1 Msg1 sent by the terminal, and determining, when a resource used by the terminal to send the Msg1 is a dedicated random access resource, that the terminal requests to repeatedly send Msg4, the dedicated random access resource being associated with the Msg4 repetition request; or

[0135] Receive message 3 Msg3 sent by the terminal, and determine, based on the request indication information carried in Msg3, that the terminal requests to repeatedly send Msg4.

[0136] Optionally, the dedicated random access resource includes at least one of the following: a preamble code type, a time domain resource, or a frequency domain resource.

[0137] Optionally, the sending Msg4 to the terminal based on the Msg4 repeat request includes:

[0138] Determining the number of Msg4 repetitions based on the Msg4 repetition request;

[0139] Sending Msg4 to the terminal on at least one time-frequency domain resource according to the number of repetitions of Msg4.

[0140] Optionally, the device further includes a second sending unit, configured to send the number of repetitions of Msg4 to the terminal.

[0141] Optionally, the number of repetitions of Msg4 is indicated by the first bit field in downlink control information DCI;

[0142] The sending of the Msg4 repetition number to the terminal includes:

[0143] Sending the DCI to the terminal via a physical downlink control channel PDCCH scrambled by a random access radio network temporary identifier RA-RNTI; or

[0144] The DCI is sent to the terminal through a physical downlink control channel PDCCH scrambled by a temporary cell-radio network temporary identifier TC-RNTI.

[0145] Optionally, the first bit field is used to indicate the number of Msg4 repetitions in the candidate Msg4 repetition number; or

[0146] The bit value of the first bit field is associated with a preset number of repetitions of Msg4.

[0147] Optionally, the first bit field is an extended DCI bit field, a DCI reserved bit field, or the upper 2 bits of a DCI modulation and coding scheme MCS.

[0148] Optionally, the apparatus further includes a redundant version sending unit, configured to send multiple redundant versions to the terminal.

[0149] Optionally, the device further includes an RSRP sending threshold unit, wherein the RSRP threshold sending unit is configured to send a reference signal received power RSRP threshold to the terminal, wherein the RSRP threshold is used by the terminal to determine whether to perform repeated Msg4 transmission.

[0150] In the seventh aspect, an embodiment of the present disclosure also provides a non-transitory readable storage medium, which stores a computer program, and the computer program is used to enable the processor to execute the downlink service channel enhancement method in the random access process described in the first aspect or the second aspect above.

[0151] In an eighth aspect, an embodiment of the present disclosure further provides a processor-readable storage medium, wherein the processor-readable storage medium stores a computer program, and the computer program is used to enable the processor to execute the downlink service channel enhancement method in the random access process described in the first aspect or the second aspect above.

[0152] In the ninth aspect, an embodiment of the present disclosure further provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and the computer program is used to enable a computer to execute the downlink service channel enhancement method in the random access process described in the first aspect or the second aspect above.

[0153] In the tenth aspect, an embodiment of the present disclosure further provides a communication device, in which a computer program is stored, and the computer program is used to enable the communication device to execute the downlink service channel enhancement method in the random access process described in the first aspect or the second aspect above.

[0154] In the eleventh aspect, an embodiment of the present disclosure further provides a chip product, in which a computer program is stored, and the computer program is used to enable the chip product to execute the downlink service channel enhancement method in the random access process described in the first aspect or the second aspect above.

[0155] The disclosed embodiments provide a method and apparatus for enhancing downlink traffic channels during random access. A terminal determines to retransmit Msg4 and sends a Msg4 retransmission request to the network. By retransmitting Msg4, coding gain is achieved. This addresses situations where the terminal cannot access due to power constraints, insufficient link budget, or other factors, thereby improving the terminal's single-access success rate. Furthermore, the Msg4 retransmission request allows for flexible requesting of Msg4 retransmissions. BRIEF DESCRIPTION OF THE DRAWINGS

[0156] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0157] FIG1 is a flow chart of a method for enhancing a downlink traffic channel in a random access process according to an embodiment of the present disclosure;

[0158] FIG2 is a second flow diagram of a method for enhancing a downlink traffic channel in a random access process provided by an embodiment of the present disclosure;

[0159] FIG3 is a third flow chart of a method for enhancing a downlink traffic channel in a random access process according to an embodiment of the present disclosure;

[0160] FIG4 is a fourth flow chart of a method for enhancing a downlink traffic channel in a random access process according to an embodiment of the present disclosure;

[0161] FIG5 is a fifth flow chart of a method for enhancing a downlink traffic channel in a random access process according to an embodiment of the present disclosure;

[0162] FIG6 is a sixth flow chart of a method for enhancing a downlink traffic channel in a random access process according to an embodiment of the present disclosure;

[0163] FIG7 is a structural diagram of a downlink traffic channel enhancement device in a random access process according to an embodiment of the present disclosure;

[0164] FIG8 is a second structural diagram of a downlink traffic channel enhancement device in a random access process provided by an embodiment of the present disclosure;

[0165] FIG9 is a schematic structural diagram of a terminal provided in an embodiment of the present disclosure;

[0166] FIG10 is a schematic diagram of the structure of a network device provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0167] In the embodiments of the present disclosure, the term "and / or" describes the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally indicates that the associated objects are in an "or" relationship.

[0168] In the embodiments of the present disclosure, the term "plurality" refers to two or more than two, and other quantifiers are similar thereto.

[0169] The following will be combined with the accompanying drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the embodiments described are only part of the embodiments of the present disclosure and not all of the embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present disclosure.

[0170] The technical solution provided by the embodiments of the present disclosure can be applicable to a variety of systems, especially 5G (5th Generation Mobile Communication Technology, fifth generation mobile communication technology) system. For example, the applicable system can be a global system of mobile communication (GSM) system, a code division multiple access (CDMA) system, a wideband code division multiple access (WCDMA) general packet radio service (GPRS) system, a long term evolution (LTE) system, a LTE frequency division duplex (FDD) system, a LTE time division duplex (TDD) system, an advanced long term evolution (LTE-A) system, a universal mobile telecommunication system (UMTS), a world-wide interoperability for microwave access (WiMAX) system, a 5G new air interface (NR) system, etc. These various systems include terminal devices and network devices. The system may also include core network parts, such as the Evolved Packet System (EPS), 5G System (5GS), etc.

[0171] The terminal device involved in the embodiments of the present disclosure may be a device that provides voice and / or data connectivity to a user, a handheld device with wireless connection function, or other processing device connected to a wireless modem. In different systems, the name of the terminal device may also be different. For example, in a 5G system, the terminal device may be called User Equipment (UE). A wireless terminal device can communicate with one or more core networks (CN) via a radio access network (RAN). The wireless terminal device may be a mobile terminal device, such as a mobile phone (or "cellular" phone) and a computer with a mobile terminal device. For example, it may be a portable, pocket-sized, handheld, computer-built-in or vehicle-mounted mobile device that exchanges voice and / or data with a radio access network. For example, Personal Communication Service (PCS) phones, cordless phones, Session Initiated Protocol (SIP) phones, Wireless Local Loop (WLL) stations, Personal Digital Assistants (PDAs), and other devices. The wireless terminal device may also be referred to as a system, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, an access point, a remote terminal, an access terminal, a user terminal, a user agent, or a user device, but is not limited in the embodiments of the present disclosure.

[0172] The network device involved in the embodiments of the present disclosure may be a base station, which may include multiple cells providing services to terminals. Depending on the specific application scenario, the base station may also be called an access point, or may be a device in an access network that communicates with a wireless terminal device through one or more sectors on an air interface, or may be called another name. The network device may be used to interchange received air frames with Internet Protocol (IP) packets, acting as a router between the wireless terminal device and the rest of the access network, wherein the rest of the access network may include an Internet Protocol (IP) communication network. The network device may also coordinate the attribute management of the air interface. For example, the network device involved in the embodiments of the present disclosure may be a base transceiver station (BTS) in the Global System for Mobile communications (GSM) or code division multiple access (CDMA), a network device (NodeB) in wide-band code division multiple access (WCDMA), an evolutionary Node B (eNB or e-NodeB) in the long term evolution (LTE) system, a 5G base station (gNB) in the 5G network architecture (next generation system), a home evolved Node B (HeNB), a relay node, a femto, a pico, etc., and is not limited in the embodiments of the present disclosure. In some network structures, the network device may include a centralized unit (CU) node and a distributed unit (DU) node, and the centralized unit and the distributed unit may also be geographically separated.

[0173] Network devices and terminal devices can each use one or more antennas for Multiple Input Multiple Output (MIMO) transmission. MIMO transmission can be single-user MIMO (SU-MIMO) or multi-user MIMO (MU-MIMO). Depending on the form and number of antenna combinations, MIMO transmission can be 2D-MIMO, 3D-MIMO, FD-MIMO, or massive-MIMO. It can also use diversity transmission, precoding transmission, or beamforming transmission.

[0174] To facilitate understanding of the embodiments of the present disclosure, the following introduces terms or background related to the embodiments of the present disclosure:

[0175] From the physical layer perspective, the four-step random access process includes:

[0176] Step 1: The terminal (UE) sends a random access preamble sequence (i.e., message 1: Msg1) on the physical random access channel (PRACH).

[0177] Step 2: The UE receives a Random Access Response (RAR) message (i.e., Message 2: Msg2) on the Physical Downlink Control Channel (PDCCH) / Physical Downlink Shared Channel (PDSCH).

[0178] Step 3: The UE sends Message 3 (Msg3) on the Physical Uplink Shared Channel (PUSCH).

[0179] Step 4: The UE receives a contention resolution message (ie, message 4: Msg4) on the physical downlink shared channel (PDSCH).

[0180] Before performing the random access process, the terminal obtains the set of synchronization signal and physical broadcast channel block (Synchronization Signal / PBCH block, SSB, also called SS / PBCH block) indexes, physical layer time and frequency resources, random access preamble sequence format and random access preamble sequence set parameters through the system broadcast message. Then, the UE generates a random access preamble sequence based on the obtained information and initiates random access on the corresponding physical layer random access time and frequency resources.

[0181] The base station detects the PRACH. If the base station detects the preamble sequence, it will feedback the corresponding random access response (RAR) information on the PDCCH / PDSCH. After sending the random access preamble sequence, the terminal detects the RAR information fed back on the downlink PDCCH / PDSCH within a RAR time window. If the corresponding RAR information is detected, it means that the random access preamble sequence sent by the UE has been detected by the base station.

[0182] If the UE receives a PDSCH with a RAR message corresponding to the Preamble transmission from the UE, the UE sends a PUSCH of Msg3 in the corresponding time slot.

[0183] When the UE has not been configured with a Cell Radio Network Temporary Identifier (C-RNTI), in response to the PUSCH transmission of Msg3, the UE attempts to detect the downlink control information (DCI) format 1_0 of the cyclic redundancy check (CRC) scrambled by the corresponding temporary cell radio network temporary identifier (Temporary C-RNTI, TC-RNTI), and the TC-RNTI schedules the PDSCH containing the UE contention resolution identifier. In response to the PDSCH reception with the UE contention resolution identifier, the UE will send HARQ-ACK information in the physical uplink control channel (PUCCH).

[0184] In related technologies, in certain scenarios, some terminals cannot meet access requirements due to power limitations, insufficient link budget, etc., resulting in access failure and low access efficiency. Therefore, the present disclosure proposes a method for enhancing downlink traffic channels during random access.

[0185] The following will be combined with the accompanying drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the embodiments described are only part of the embodiments of the present disclosure and not all of the embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present disclosure.

[0186] FIG1 is a flow chart of a method for enhancing a downlink traffic channel in a random access process provided by an embodiment of the present disclosure. As shown in FIG1 , an embodiment of the present disclosure provides a method for enhancing a downlink traffic channel in a random access process, which is applied to a terminal and includes:

[0187] Step 110, determining to perform repetition of message 4 (Msg4);

[0188] Specifically, repeated transmission of Msg4 means that during a random access process, the network side can transmit Msg4 on at least one time-frequency domain resource, and accordingly, the terminal can receive Msg4 on at least one time-frequency domain resource, that is, the terminal can receive multiple Msg4s sent by the network side.

[0189] The terminal can determine whether it needs to retransmit Msg4 based on the obtained information.

[0190] Exemplarily, the terminal may measure signal strength, signal quality, etc., and determine whether to repeatedly transmit Msg4 according to the signal strength and signal quality.

[0191] For example, the terminal may determine whether to repeatedly transmit Msg 4 based on the importance of the service. If the importance of the service is high, it is determined to repeatedly transmit Msg 4 to ensure successful access.

[0192] For example, the terminal may determine whether to retransmit Msg 4 based on historical access data. If multiple access attempts fail, in order to ensure successful access, it may be determined to retransmit Msg 4.

[0193] It should be understood that the above is an example for the convenience of understanding the embodiments of the present disclosure. The embodiments of the present disclosure do not limit how the terminal determines whether to repeat the transmission of Msg4. It can be determined spontaneously by the terminal, or it can be determined by the terminal receiving instructions from other devices or based on information sent by other devices.

[0194] The embodiments of the present disclosure do not limit when the terminal determines whether to repeatedly transmit Msg4. For example, the terminal may determine whether to repeatedly transmit Msg4 before the random access process, such as determining whether to repeatedly transmit Msg4 before sending Msg1 message. The terminal may also determine whether to repeatedly transmit Msg4 during the random access process, such as determining whether to repeatedly transmit Msg4 before sending Msg3 message.

[0195] Step 120: Send a Msg4 repeat request to the network side, where the Msg4 repeat request is used to request the network side to repeatedly send Msg4.

[0196] Specifically, the terminal requests the network side to repeatedly send Msg4 through the Msg4 repeat request.

[0197] In the method for enhancing the downlink traffic channel during random access provided by the embodiments of the present disclosure, a terminal determines to perform repeated Msg4 transmissions and sends a Msg4 repeat request to the network. By repeatedly transmitting Msg4, coding gain is achieved, addressing situations where the terminal cannot meet access requirements due to power constraints, insufficient link budget, and other factors, thereby improving the success rate of a single access attempt by the terminal. Furthermore, the Msg4 repeat request allows for flexible requesting of repeated Msg4 transmissions.

[0198] Optionally, the determining to perform repeated transmission of Msg4 includes:

[0199] Measure Reference Signal Receiving Power (RSRP);

[0200] When the RSRP is lower than a preset RSRP threshold, it is determined to perform repeated transmission of Msg4.

[0201] Optionally, when the RSRP is not lower than the preset RSRP threshold, it is determined not to perform repeated transmission of Msg4.

[0202] Optionally, the RSRP threshold is configured on the network side.

[0203] Specifically, the terminal measures RSRP and compares the RSRP with an RSRP threshold. The RSRP threshold may be obtained by the terminal through a system message. When the RSRP is lower than the RSRP threshold, it is determined to repeatedly transmit Msg4.

[0204] In one possible implementation, the parameter rsrp-ThresholdMsg4 is defined, where rsrp-ThresholdMsg4 is the RSRP threshold, which is used by the UE to determine whether it is necessary to report (send to the network side) a Msg4 repeat request. If the RSRP actually measured by the terminal is lower than rsrp-ThresholdMsg4, the UE sends a Msg4 repeat request.

[0205] In one possible implementation, a parameter rsrp-ThresholdMsg4 is defined. rsrp-ThresholdMsg4 is used to indicate the difference between the Msg3 repeat request threshold and the RSRP threshold. The UE determines whether to report an Msg4 repeat request. If the actual measured RSRP is lower than rsrp-ThresholdMsg3-rsrp-ThresholdMsg4, the UE sends an Msg4 repeat request. That is, the RSRP threshold is rsrp-ThresholdMsg3-rsrp-ThresholdMsg4.

[0206] In one possible implementation, the parameter rsrp-ThresholdMsg3 in the related technology is reused, and rsrp-ThresholdMsg3 is used as the RSRP threshold for the UE to determine whether it is necessary to report a Msg4 repeat request. If the actual measured RSRP is lower than rsrp-ThresholdMsg3, the UE sends a Msg4 repeat request.

[0207] The method for enhancing the downlink traffic channel during the random access process provided by the embodiments of the present disclosure determines whether repeated Msg4 transmission is required based on RSRP. RSRP can represent signal strength, and the signal strength is combined with the need for repeated Msg4 transmission: when the RSRP is lower than the RSRP threshold, the signal strength is low, the probability of access failure is high, and repeated Msg4 transmission is required. When the RSRP is lower than the RSRP threshold configured on the network side, it is determined that repeated Msg4 transmission is required, and an Msg4 repeat request is sent to the network side, avoiding resource waste caused by repeated Msg4 transmission when the signal strength is high and the probability of successful access is high.

[0208] Optionally, the sending of the Msg4 repeat request to the network side includes:

[0209] Indicating the Msg4 repeat request by sending a Msg1 using a dedicated random access resource, the dedicated random access resource being associated with the Msg4 repeat request; or

[0210] The request indication information is sent through Msg3, where the request indication information is used to instruct the Msg4 to repeat the request.

[0211] For the Msg1 sent by using dedicated random access resources to indicate the Msg4 repeat request:

[0212] Specifically, dedicated random access resources refer to random access resources dedicated to sending Msg4 repeat requests, and random access resources refer to resources used for random access.

[0213] The dedicated random access resource may be pre-associated with the Msg4 repeat request.

[0214] Optionally, the dedicated random access resource includes at least one of the following: a preamble code type, a time domain resource, or a frequency domain resource.

[0215] A dedicated preamble type is used as a dedicated random access resource. For example, a preamble with format 1 is used as a dedicated random access resource. When the terminal initiates a Msg 4 repeat request, the terminal uses a preamble with format 1 when sending Msg1.

[0216] Dedicated time domain resources are used as dedicated random access resources. For example, slot 1 is used as the dedicated random access resource. When the terminal initiates a Msg 4 repeat request, the terminal sends Msg 1 on slot 1.

[0217] Dedicated frequency domain resources are used as dedicated random access resources. For example, subcarrier 1 is used as the dedicated random access resource. When the terminal initiates a Msg 4 repeat request, the terminal sends Msg 1 on subcarrier 1.

[0218] It should be understood that multiple items of the preamble code type, time domain resources, and frequency domain resources may also be combined. For example, a combination of a certain time domain resource and a certain frequency domain resource is used as a dedicated random access resource.

[0219] The embodiment of the present disclosure provides a method for enhancing a downlink service channel in a random access process. By using a dedicated random access resource to send an Msg1 indicating the Msg4 repeat request, the terminal can request the network side to repeat Msg4 and flexibly request repeated transmission of Msg4.

[0220] For sending the request indication information via Msg3, the request indication information is used to instruct the Msg4 to repeat the request:

[0221] Specifically, the request indication information is carried in Msg3, and the request indication information is used to request the network side to repeatedly send Msg4.

[0222] Exemplarily, in the RRCSetupRequest message in the related art, a reserved bit is used to indicate the request indication information, or, based on the RRCSetupRequest message in the related art, a new bit is added to indicate the request indication information.

[0223] Optionally, a Msg4 repeat request may be indicated by the bit value of the bit used to indicate the request indication information. Exemplarily, if the bit value of the bit used to indicate the request indication information is 1, it indicates an Msg4 repeat request, requesting the network side to repeat the transmission of Msg4; if the bit value of the bit used to indicate the request indication information is 0, it indicates no Msg4 repeat request.

[0224] The embodiment of the present disclosure provides a method for enhancing a downlink service channel in a random access process. By sending a request indication message via Msg3, the terminal can send a Msg4 repeat request to the network side, flexibly requesting repeated transmission of Msg4.

[0225] Optionally, the method further includes:

[0226] Receive the number of repetitions of Msg4 sent by the network side;

[0227] Receive the Msg4 sent by the network side according to the number of repetitions of the Msg4.

[0228] Specifically, according to the number of repetitions of Msg4, Msg4 is received on the corresponding time-frequency domain resources.

[0229] In a possible implementation, the number of repetitions of Msg4 may be 1. For example, when network resources are limited, the network side does not configure repeated transmission of Msg4 after receiving a request for repeating Msg4.

[0230] The method for enhancing the downlink service channel in the random access process provided by the embodiment of the present disclosure implements repeated transmission of Msg4 according to the number of repetitions of Msg4.

[0231] Optionally, the receiving, according to the number of repetitions of the Msg4, the Msg4 sent by the network includes:

[0232] Determine at least one time-frequency domain resource according to the number of repetitions of Msg4;

[0233] On the at least one time-frequency domain resource, receive Msg4 sent by the network side.

[0234] Specifically, the network side can indicate the starting time-frequency domain resources for sending Msg4, and the terminal can determine the time-frequency domain resources for repeatedly sending Msg4 based on the starting time-frequency domain resources and the number of repetitions.

[0235] In a possible implementation, the network side (such as a base station) transmits Msg4 in multiple consecutive time slots, occupying the same frequency domain RB and time domain starting symbol and symbol length in each time slot.

[0236] The terminal determines multiple time slots according to the number of repetitions of the Msg4.

[0237] The network side indicates the time-frequency domain resources of Msg4 in each time slot, and the terminal receives Msg4 in multiple time slots according to the time-frequency domain resources indicated by the network side.

[0238] For time domain resources, illustratively, the network indicates that the starting time domain resources of Msg4 are certain consecutive symbols on slot1, and the number of repetitions is 4. Then the terminal receives the repeatedly transmitted Msg4 on the same symbols of slot1, slot2, slot3 and slot4.

[0239] For frequency domain resources, the frequency domain resources corresponding to the repeatedly transmitted Msg4 may be the same.

[0240] Exemplarily, the network side may indicate that the frequency domain resource of Msg4 is subcarrier 1. The terminal receives multiple Msg4 on subcarrier 1.

[0241] For time-frequency domain resources, for example, the network side indicates that the starting time domain resource of Msg4 is symbol 1 to symbol 4 on slot 1, the frequency domain is RB3, and the number of repetitions is 4. Then the terminal receives Msg4 on symbol 1 to symbol 4 on slot 1 and frequency domain RB3; the terminal receives Msg4 on symbol 1 to symbol 4 on slot 2 and frequency domain RB3, the terminal receives Msg4 on symbol 1 to symbol 4 on slot 3 and frequency domain RB3, and the terminal receives Msg4 on symbol 1 to symbol 4 on slot 4 and frequency domain RB3.

[0242] The method for enhancing the downlink service channel in the random access process provided by the embodiment of the present disclosure implements repeated transmission of Msg4 according to the number of repetitions of Msg4.

[0243] Optionally, the number of repetitions of Msg4 is indicated by the first bit field in downlink control information DCI;

[0244] The receiving the number of repetitions of Msg4 sent by the network side includes:

[0245] Receiving the DCI sent by the network side through a physical downlink control channel PDCCH scrambled by a random access radio network temporary identifier (Random Access-Radio Network Temporary Identifier, RA-RNTI); or

[0246] The DCI is received, which is sent by the network side through a physical downlink control channel PDCCH scrambled by a temporary cell-radio network temporary identifier (TC-RNTI).

[0247] Specifically, the number of repetitions of Msg4 is indicated through DCI.

[0248] The PDCCH scrambled by the Random Access-Radio Network Temporary Identifier (RA-RNTI) refers to the PDCCH of Msg2, that is, the DCI format 1_0 when RA-RNTI is scrambled.

[0249] The PDCCH scrambled by the temporary cell radio network temporary identifier (TC-RNTI) refers to the PDCCH of Msg4, that is, the DCI format 1_0 when TC-RNTI is scrambled.

[0250] It should be understood that when the Msg1 sent by using a dedicated random access resource indicates the Msg4 repeat request, DCI can be received through the RA-RNTI-scrambled PDCCH HPDCCH, or through the TC-RNTI-scrambled physical downlink control channel PDCCH; when the request indication information is sent through Msg3 to indicate the Msg4 repeat request, DCI is received through the TC-RNTI-scrambled physical downlink control channel PDCCH.

[0251] Optionally, the first bit field is used to indicate the number of Msg4 repetitions in the candidate Msg4 repetition number; or

[0252] The bit value of the first bit field is associated with a preset number of repetitions of Msg4.

[0253] Specifically, the first bit field is used to indicate the number of Msg4 repetitions in the candidate Msg4 repetition number:

[0254] Specifically, the first bit field in the DCI indicates which value the Msg4 repetition number is among the candidate Msg4 repetition numbers.

[0255] The number of repetitions of the candidate Msg4 can be determined by RRC parameters, or a preset default value can be used. The RRC parameters can be obtained from the network side through system messages.

[0256] In one possible implementation, the RRC parameter includes a first RRC parameter and a second RRC parameter, wherein the first RRC parameter is used to indicate all candidate Msg4 repetition times, and the second RRC parameter is used to indicate some candidate Msg4 repetition times. It should be understood that the some candidate Msg4 repetition times are a subset of all candidate Msg4 repetition times. All candidate Msg4 repetition times can be understood as a set of candidate Msg4 repetition times, and some candidate Msg4 repetition times can be understood as an enumeration value of candidate Msg4 repetition times.

[0257] The bit value of the first bit field in the DCI indicates that the number of Msg4 repetitions is the value in the enumeration value of the candidate Msg4 repetitions indicated by the second RRC parameter.

[0258] Exemplarily, the first RRC parameter indicates the number of repetitions of all candidate Msg4s: NumberOfMsg4-Repetitions::=ENUMERATED{n1,n2,n3,n4,n7,n8,n12,n16};

[0259] n1, n2, n3, n4, n7, n8, n12, n16 represent the number of repetitions of all candidate Msg4

[0260] The second RRC parameter is used to indicate the number of candidate Msg4 repetitions: numberOfMsg4-RepetitionsList SEQUENCE(SIZE(4))OF NumberOfMsg4-Repetitions

[0261] numberOfMsg4-RepetitionsList represents the second RRC parameter, and SIZE4 represents 4 candidate Msg4 repetitions among all candidate Msg4 repetitions indicated in the first RRC parameter (NumberOfMsg4-Repetitions). The present disclosure does not limit the specific value of the candidate Msg4 repetitions indicated by the second RRC parameter.

[0262] Table 1 is one of the first bit field value tables provided in an embodiment of the present disclosure. As shown in Table 1, the relationship between the first bit field, the candidate Msg4 repetition number indicated by the second RRC parameter, and the Msg4 repetition number is shown in Table 1:

[0263] Table 1. First bit field value table (I)

[0264] It should be understood that the above examples are provided to facilitate understanding of the present disclosure and should not constitute any limitation to the present disclosure.

[0265] In the embodiment of the present disclosure, the candidate Msg4 repetition times have a wide range of values, which can achieve flexible value selection of the Msg4 repetition times.

[0266] In one possible implementation, the RRC parameter is used to indicate the candidate Msg4 repetition number, that is, the enumeration value of the Msg4 repetition number. The bit value of the first bit field in the DCI indicates the number of the candidate Msg4 repetition number.

[0267] Illustratively, NumberOfMsg4-Repetitions::=ENUMERATED{n1,n2,n4,n8}.

[0268] The RRC parameter NumberOfMsg4-Repetitions indicates that the candidate Msg4 repetition numbers include n1, n2, n4 and n8.

[0269] Table 2 is a second table of first bit field values ​​provided in an embodiment of the present disclosure. As shown in Table 2, the relationship between the first bit field, the candidate Msg4 repetition number indicated by the RRC parameter, and the Msg4 repetition number is shown in Table 2:

[0270] Table 2. The second table of values ​​for the first bit field

[0271] In a possible implementation, when the UE sends a Msg4 repetition request, but the upper layer does not configure the RRC parameter to define the candidate Msg4 repetition number, the default candidate Msg4 repetition number of the RRC parameter can be used.

[0272] Exemplarily, the default candidate Msg4 repetition count is {1, 2, 3, 4}, and the Msg4 repetition count is indicated in the default candidate Msg4 repetition count by the bit value of the first bit field in the DCI.

[0273] In the disclosed embodiment, the flexible value of the number of repetitions of Msg4 indicates simplicity.

[0274] Table 3 is the third table of first bit field values ​​provided by an embodiment of the present disclosure. As shown in Table 3, the relationship between the first bit field and the number of repetitions of Msg4 is shown in Table 3:

[0275] Table 3. First bit field value table 3

[0276] The bit value of the first bit field is associated with the preset number of repetitions of Msg4:

[0277] Specifically, the first bit field is associated with a preset number of repetitions of Msg4.

[0278] Exemplarily, when the bit value of the first bit field is 00, it indicates that the number of repetitions of Msg4 is 1; when the bit value of the first bit field is 01, it indicates that the number of repetitions of Msg4 is 2; when the bit value of the first bit field is 10, it indicates that the number of repetitions of Msg4 is 3; when the bit value of the first bit field is 11, it indicates that the number of repetitions of Msg4 is 4.

[0279] Optionally, the bit value of the first bit field may be associated with a preset number of repetitions of Msg4 by setting a repetition number table.

[0280] Illustratively, Table 4 is a fourth table of first bit field values ​​provided in an embodiment of the present disclosure. As shown in Table 4, Table 4 lists three examples of Msg4 repetition count values. The relationship between the first bit field and the Msg4 repetition count is shown in Table 4:

[0281] Table 4. Table 4 of the first bit field value table

[0282] In Example 1, when the bit value of the first bit field is 00, it indicates that the number of repetitions of Msg4 is 1; when the bit value of the first bit field is 01, it indicates that the number of repetitions of Msg4 is 2; when the bit value of the first bit field is 10, it indicates that the number of repetitions of Msg4 is 4; when the bit value of the first bit field is 11, it indicates that the number of repetitions of Msg4 is 8.

[0283] In Example 2, when the bit value of the first bit field is 00, it indicates that the number of repetitions of Msg4 is 2; when the bit value of the first bit field is 01, it indicates that the number of repetitions of Msg4 is 4; when the bit value of the first bit field is 10, it indicates that the number of repetitions of Msg4 is 8; when the bit value of the first bit field is 11, it indicates that the number of repetitions of Msg4 is 16.

[0284] In Example 3, when the bit value of the first bit field is 00, it indicates that the number of repetitions of Msg4 is 1; when the bit value of the first bit field is 01, it indicates that the number of repetitions of Msg4 is 2; when the bit value of the first bit field is 10, it indicates that the number of repetitions of Msg4 is 3; when the bit value of the first bit field is 11, it indicates that the number of repetitions of Msg4 is 4.

[0285] In the embodiment of the present disclosure, the method for indicating the number of repetitions of Msg4 is flexible and concise.

[0286] Optionally, the first bit field is the extended DCI bit field, the DCI reserved bit field, or the upper 2 bits of a DCI modulation and coding scheme (MCS).

[0287] Specifically, the extended DCI bit field refers to adding bits on the basis of the DCI in the related art to obtain an extended DCI bit field, and using the extended DCI bit field as the first bit field.

[0288] Exemplarily, 2 bits are added as the first bit field in the PDCCH of Msg2 (DCI format 1_0 when RA-RNTI is scrambled) or the PDCCH of Msg4 (DCI format 1_0 when TC-RNTI is scrambled). The first bit field can also be called the repetition number indication field repetition number. The embodiment of the present disclosure does not limit the name of the first bit field.

[0289] The embodiment of the present disclosure expands the DCI bit field as the first bit field and flexibly indicates the number of Msg4 repetitions by expanding the DCI bit field, thereby ensuring that the existing DCI bit field in the related technology is not affected and maintaining compatibility with related protocols.

[0290] The DCI reserved bit field refers to reusing the bit field reserved in the DCI in the related art as the first bit field.

[0291] Exemplarily, 2 bits in the reserved bits of the PDCCH (DCI format 1_0 when RA-RNTI scrambled) of the reused Msg2 indicate the number of repetitions.

[0292] The embodiment of the present disclosure uses the DCI reserved bit field as the first bit field, and flexibly indicates the number of Msg4 repetitions through the DCI reserved bit field, thereby ensuring that the DCI length remains unchanged and maintaining compatibility with related protocols.

[0293] The upper 2 bits of the DCI modulation and coding scheme MCS refer to reusing the upper 2 bits of the DCI domain MCS, and the corresponding MCS indication changes from 5 bits to the lower 3 bits.

[0294] For example, the high 2 bits in the PDCCH of Msg2 (DCI format 1_0 when RA-RNTI scrambled) or the PDCCH of Msg4 (DCI format 1_0 when TC-RNTI scrambled) indicate the number of repetitions. The corresponding MCS specific indication is as follows:

[0295] Define a new high-level parameter mcs-Msg4-Repetitions to configure the MCS index candidate value of msg4PDSCH;

[0296] Or if no new higher-layer parameter mcs-Msg4-Repetitions is defined but the UE sends a repeat transmission request, it is assumed that its value is {0, 1, 2, 3, 4, 5, 6, 7}.

[0297] Table 5 is a table of correspondence between the lower 3 bits of the MCS field and the MCS index IMCS provided in an embodiment of the present disclosure. The correspondence between the lower 3 bits of the MCS field in the DCI and the MCS index IMCS is shown in Table 5:

[0298] Table 5. MCS field lower 3 bits and MCS index I MCS Correspondence table

[0299] The embodiment of the present disclosure uses the upper 2 bits of the DCI modulation and coding scheme MCS as the first bit field, and flexibly indicates the number of Msg4 repetitions through the upper 2 bits of the DCI modulation and coding scheme MCS, thereby ensuring that the DCI length remains unchanged and maintaining compatibility with related protocols.

[0300] Optionally, the method further includes:

[0301] A plurality of redundancy versions are received, and the plurality of redundancy versions are merged.

[0302] Specifically, the terminal may receive multiple redundancy versions according to the redundancy version sequence on multiple time-frequency domain resources.

[0303] Optionally, the redundant version sequence is "0, 2, 3, 1", that is, multiple redundant version transmissions are performed cyclically according to the redundant version sequence of "0 2 3 1".

[0304] In a possible implementation, Table 6 is a redundancy version information table provided in an embodiment of the present disclosure, and the redundancy version applied to the n-th transmission of a TB can be determined by Table 6.

[0305] Table 6. Redundant version information table

[0306] Exemplarily, the DCI indicates that the starting time domain resource of Msg4 is slot 1, the number of repetitions is 4, and the redundancy version of the first TB transmission is 2.

[0307] The terminal receives the redundant version of rv on slot 1. id 2, the redundant version of rv received on slot 2 id 3, the redundant version of rv received on slot 3 id 1, the redundant version of rv received on slot 4 id is 0.

[0308] It should be understood that the above examples are provided to facilitate understanding of the present disclosure and should not constitute any limitation to the present disclosure.

[0309] According to the method for enhancing the downlink service channel in the random access process provided by the embodiment of the present disclosure, the UE can receive PDSCH in multiple consecutive time slots and combine different redundancy versions to obtain coding gain.

[0310] FIG2 is a second flow diagram of a method for enhancing a downlink traffic channel during a random access process provided by an embodiment of the present disclosure. As shown in FIG2 , an embodiment of the present disclosure provides a method for enhancing a downlink traffic channel during a random access process, which is applied to a network side and includes:

[0311] Step 210: receiving a message 4 (Msg4) repeat request sent by the terminal, wherein the Msg4 repeat request is used to request repeated sending of Msg4;

[0312] Specifically, for the introduction of Msg4 repeat request, please refer to the above introduction and will not be repeated here.

[0313] Step 220: Send Msg4 to the terminal based on the Msg4 repeat request.

[0314] In one possible implementation, the network configures the repetition of Msg4 based on the Msg4 repetition request sent by the terminal and network conditions (such as network load and remaining network resources). The network can configure the terminal to repetitively send Msg4, that is, send Msg4 multiple times. In some scenarios, such as insufficient resources, the network may not configure the terminal to repetitively send Msg4, that is, send Msg4 only once.

[0315] In the method for enhancing the downlink service channel during the random access process provided by the embodiment of the present disclosure, the network side can repeatedly transmit Msg4 to the terminal based on the Msg4 repetition request. The network side can enable the terminal to obtain coding gain by repeatedly transmitting Msg4, thereby solving the problem that the terminal cannot meet the access requirements due to power limitation, insufficient link budget, etc., and improving the success rate of the terminal's one-time access.

[0316] Optionally, the receiving the Msg4 repeat request sent by the terminal includes:

[0317] receiving a Msg1 sent by the terminal, and determining, if a resource used by the terminal to send the Msg1 is a dedicated random access resource, that the terminal requests to repeatedly send a Msg4, the dedicated random access resource being associated with the Msg4 repetition request; or

[0318] Receive Msg3 sent by the terminal, and determine, based on the request indication information carried in the Msg3, that the terminal requests to repeatedly send Msg4.

[0319] For receiving Msg1 sent by the terminal, if resources used by the terminal to send the Msg1 are dedicated random access resources, determining that the terminal requests to repeatedly send Msg4:

[0320] Specifically, dedicated random access resources refer to random access resources dedicated to sending Msg4 repeat requests, and random access resources refer to resources used for random access.

[0321] The dedicated random access resource may be pre-associated with the Msg4 repeat request.

[0322] Optionally, the dedicated random access resource includes at least one of the following: a preamble code type, a time domain resource, or a frequency domain resource.

[0323] A dedicated preamble type is used as a dedicated random access resource. For example, a preamble with format 1 is used as a dedicated random access resource. When the terminal uses a preamble with format 1 when sending Msg1, the network side determines that the terminal sends a Msg4 repeat request, requesting repeated sending of Msg4.

[0324] Dedicated time domain resources are used as dedicated random access resources. For example, slot 1 is used as the dedicated random access resource. When the terminal sends Msg 1 in slot 1, the network side determines that the terminal sends a Msg 4 repeat request, requesting repeated sending of Msg 4.

[0325] Dedicated frequency domain resources are used as dedicated random access resources. For example, subcarrier 1 is used as a dedicated random access resource. When the terminal initiates a msg4 repeat request and sends Msg1 on subcarrier 1, the network side determines that the terminal sends a Msg4 repeat request and requests repeated sending of Msg4.

[0326] Optionally, multiple random access resources can be combined, which will not be described in detail here.

[0327] The method for enhancing a downlink service channel in a random access process provided by an embodiment of the present disclosure indicates the Msg4 repeat request by using the Msg1 sent using a dedicated random access resource, so that the network side can receive the Msg4 repeat request of the terminal.

[0328] For receiving Msg3 sent by the terminal, determining, based on the request indication information carried in the Msg3, that the terminal requests to repeatedly send Msg4:

[0329] Specifically, the request indication information is carried in Msg3, and the request indication information is used to request the network side to repeatedly send Msg4.

[0330] Exemplarily, in the RRCSetupRequest message in the related art, a reserved bit is used to indicate the request indication information, or, based on the RRCSetupRequest message in the related art, a new bit is added to indicate the request indication information.

[0331] Optionally, a Msg4 repeat request may be indicated by the bit value of the bit used to indicate the request indication information. Exemplarily, if the bit value of the bit used to indicate the request indication information is 1, it indicates an Msg4 repeat request, and the network side configures repeated transmission of Msg4; if the bit value of the bit used to indicate the request indication information is 0, the network side does not need to configure repeated transmission of Msg4.

[0332] The method for enhancing the downlink service channel in the random access process provided by the embodiment of the present disclosure sends request indication information through Msg3, and the network side can receive the Msg4 repetition request of the terminal.

[0333] Optionally, the sending Msg4 to the terminal based on the Msg4 repeat request includes:

[0334] Determining the number of Msg4 repetitions based on the Msg4 repetition request;

[0335] Sending Msg4 to the terminal on at least one time-frequency domain resource according to the number of repetitions of Msg4.

[0336] Specifically, the network side can configure the number of Msg4 repetitions, and repeatedly transmit Msg4 in multiple consecutive time slots according to the number of Msg4 repetitions. Msg4 transmission occupies the same frequency domain RB and time domain starting symbol and symbol length in each time slot.

[0337] For time domain resources, exemplarily, the starting time domain resources for the network side to send Msg4 are certain consecutive symbols on slot1, and the number of repetitions is 4. Then the network side sends the repeatedly transmitted Msg4 on the same symbols of slot1, slot2, slot3 and slot4.

[0338] For frequency domain resources, the frequency domain resources corresponding to the repeatedly transmitted Msg4 may be the same.

[0339] Exemplarily, the network side may repeatedly transmit Msg4 on the same frequency domain resources.

[0340] The network side can send multiple Msg4s on subcarrier 1.

[0341] It should be understood that the Msg4 repeatedly transmitted by the network side may occupy the same frequency domain RB and time domain starting symbol and symbol length in each time slot.

[0342] For time-frequency domain resources, exemplarily, the starting time domain resources for the network side to send Msg4 are symbols 1 to 4 on slot1, the frequency domain is RB3, and the number of repetitions is 4. Then the network side sends Msg4 on symbols 1 to 4 on slot1 and RB3 in the frequency domain; the network side sends Msg4 on symbols 1 to 4 on slot2 and RB3 in the frequency domain, the network side sends Msg4 on symbols 1 to 4 on slot3 and RB3 in the frequency domain, and the network side sends Msg4 on symbols 1 to 4 on slot4 and RB3 in the frequency domain.

[0343] Optionally, the method further includes:

[0344] Send the Msg4 repetition number to the terminal.

[0345] Specifically, the number of repetitions of Msg4 can be used for the terminal to receive Msg4.

[0346] Optionally, the number of repetitions of Msg4 is indicated by the first bit field in downlink control information DCI;

[0347] The sending of the Msg4 repetition number to the terminal includes:

[0348] Sending the DCI to the terminal via a PDCCH scrambled by RA-RNTI; or

[0349] The DCI is sent to the terminal through the PDCCH scrambled by the TC-RNTI.

[0350] Specifically, the RA-RNTI scrambled PDCCH refers to the PDCCH of Msg2, and the TC-RNTI scrambled PDCCH refers to the PDCCH of Msg4.

[0351] It should be understood that when the UE indicates the Msg4 repeat request by sending Msg1 using dedicated random access resources, DCI can be sent through the RA-RNTI scrambled PDCCH, or through the TC-RNTI scrambled PDCCH; when the UE indicates the Msg4 repeat request by sending request indication information through Msg3, DCI is sent through the TC-RNTI scrambled PDCCH.

[0352] Optionally, the first bit field is used to indicate the number of Msg4 repetitions in a candidate Msg4 repetition number, and the candidate Msg4 repetition number is determined by a radio resource control RRC parameter received from the network side; or

[0353] The bit value of the first bit field is associated with a preset number of repetitions of Msg4.

[0354] Specifically, the first bit field is used to indicate the number of Msg4 repetitions in the candidate Msg4 repetition number:

[0355] Specifically, the first bit field in the DCI indicates which value the Msg4 repetition number is among the candidate Msg4 repetition numbers.

[0356] The number of repetitions of the candidate Msg4 can be indicated by an RRC parameter, or a preset default value can be used. The RRC parameter can be sent to the terminal via a system message.

[0357] The candidate Msg4 repetition number can be indicated by the RRC parameter, and the Msg4 repetition number can be indicated in the candidate Msg4 repetition number by the bit value of the first bit field in the DCI.

[0358] In one possible implementation, the RRC parameter includes a first RRC parameter and a second RRC parameter, wherein the first RRC parameter is used to indicate all candidate Msg4 repetition times, and the second RRC parameter is used to indicate some candidate Msg4 repetition times. It should be understood that the some candidate Msg4 repetition times are a subset of all candidate Msg4 repetition times. All candidate Msg4 repetition times can be understood as a set of candidate Msg4 repetition times, and some candidate Msg4 repetition times can be understood as an enumeration value of candidate Msg4 repetition times.

[0359] The first bit field in the DCI indicates that the number of Msg4 repetitions is the value in the enumeration value of the candidate Msg4 repetition number indicated by the second RRC parameter.

[0360] Exemplarily, the first RRC parameter indicates the number of repetitions of all candidate Msg4s: NumberOfMsg4-Repetitions::=ENUMERATED{n1,n2,n3,n4,n7,n8,n12,n16};

[0361] n1, n2, n3, n4, n7, n8, n12, n16 represent the number of repetitions of all candidate Msg4

[0362] The second RRC parameter is used to indicate the number of candidate Msg4 repetitions: numberOfMsg4-RepetitionsList SEQUENCE(SIZE(4))OF NumberOfMsg4-Repetitions

[0363] numberOfMsg4-RepetitionsList represents the second RRC parameter, and SIZE4 represents 4 candidate Msg4 repetitions among all candidate Msg4 repetitions indicated by the first RRC parameter (NumberOfMsg4-Repetitions). The present disclosure does not limit the number and specific value of candidate Msg4 repetitions indicated by the second RRC parameter.

[0364] The relationship between the first bit field, the candidate Msg4 repetition number indicated by the second RRC parameter, and the Msg4 repetition number is shown in Table 1. Please refer to the above introduction and no further details will be given here.

[0365] It should be understood that the above examples are provided to facilitate understanding of the present disclosure and should not constitute any limitation to the present disclosure.

[0366] In the embodiment of the present disclosure, the candidate Msg4 repetition times have a wide range of values, which can achieve flexible value selection of the Msg4 repetition times.

[0367] In one possible implementation, the RRC parameter is used to indicate the candidate Msg4 repetition number, that is, the enumeration value of the Msg4 repetition number. The first bit field in the DCI indicates which value the Msg4 repetition number is among the candidate Msg4 repetition numbers.

[0368] Illustratively, NumberOfMsg4-Repetitions::=ENUMERATED{n1,n2,n4,n8}.

[0369] The RRC parameter NumberOfMsg4-Repetitions indicates that the candidate Msg4 repetition numbers include n1, n2, n4 and n8.

[0370] The relationship between the first bit field, the candidate Msg4 repetition number indicated by the RRC parameter, and the Msg4 repetition number is shown in Table 2. Please refer to the above introduction and no further details will be given here.

[0371] In a possible implementation, when the UE sends a Msg4 repetition request, but the upper layer does not configure the RRC parameter to define the candidate Msg4 repetition number, the default candidate Msg4 repetition number of the RRC parameter can be used.

[0372] Exemplarily, the default candidate Msg4 repetition count takes a value of {1, 2, 3, 4}, and the Msg4 repetition count is indicated in the default candidate Msg4 repetition count through the first bit field in the DCI.

[0373] In the disclosed embodiment, the flexible value of the number of repetitions of Msg4 indicates simplicity.

[0374] The relationship between the first bit field and the number of repetitions of Msg4 is shown in Table 3. Please refer to the above introduction and will not be repeated here.

[0375] The bit value of the first bit field is associated with the preset number of repetitions of Msg4:

[0376] Specifically, the first bit field is associated with a preset number of repetitions of Msg4.

[0377] Exemplarily, when the bit value of the first bit field is 00, it indicates that the number of repetitions of Msg4 is 1; when the bit value of the first bit field is 01, it indicates that the number of repetitions of Msg4 is 2; when the bit value of the first bit field is 10, it indicates that the number of repetitions of Msg4 is 3; when the bit value of the first bit field is 11, it indicates that the number of repetitions of Msg4 is 4.

[0378] Optionally, the bit value of the first bit field may be associated with a preset number of repetitions of Msg4 by setting a repetition number table.

[0379] For example, the relationship between the first bit field and the number of repetitions of Msg4 is shown in Table 4, which is not described here in detail with reference to the above description. In the embodiment of the present disclosure, the method for indicating the number of repetitions of Msg4 is flexible and concise.

[0380] Optionally, the first bit field is the extended DCI bit field, the DCI reserved bit field, or the upper 2 bits of a DCI modulation and coding scheme (MCS).

[0381] Specifically, the extended DCI bit field refers to adding bits on the basis of the DCI in the related art to obtain an extended DCI bit field, and using the extended DCI bit field as the first bit field.

[0382] Exemplarily, 2 bits are added as the first bit field in Msg2PDCCH (DCI format 1_0 when RA-RNTI is scrambled) or Msg4PDCCH (DCI format 1_0 when TC-RNTI is scrambled). The first bit field can also be called the repetition number indication field repetition number. The embodiment of the present disclosure does not limit the name of the first bit field.

[0383] The embodiment of the present disclosure expands the DCI bit field as the first bit field and flexibly indicates the number of Msg4 repetitions by expanding the DCI bit field, thereby ensuring that the existing DCI bit field in the related technology is not affected and maintaining compatibility with related protocols.

[0384] The DCI reserved bit field refers to reusing the bit field reserved in the DCI in the related art as the first bit field.

[0385] Exemplarily, 2 bits in the reserved bits of the PDCCH (DCI format 1_0 when RA-RNTI scrambled) of the reused Msg2 indicate the number of repetitions.

[0386] The embodiment of the present disclosure uses the DCI reserved bit field as the first bit field, and flexibly indicates the number of Msg4 repetitions through the DCI reserved bit field, thereby ensuring that the DCI length remains unchanged and maintaining compatibility with related protocols.

[0387] The upper 2 bits of the DCI modulation and coding scheme MCS refer to reusing the upper 2 bits of the DCI domain MCS, and the corresponding MCS indication changes from 5 bits to the lower 3 bits.

[0388] For example, the high 2 bits in the reused Msg2PDCCH (DCI format 1_0 when RA-RNTI is scrambled) or Msg4PDCCH (DCI format 1_0 when TC-RNTI is scrambled) indicate the number of repetitions. The corresponding MCS specific indication is as follows:

[0389] Define a new high-level parameter mcs-Msg4-Repetitions to configure the MCS index candidate value of msg4PDSCH;

[0390] Or if no new higher-layer parameter mcs-Msg4-Repetitions is defined but the UE sends a repeat transmission request, it is assumed that its value is {0, 1, 2, 3, 4, 5, 6, 7}.

[0391] The correspondence between the lower 3 bits of the MCS field in the DCI and the MCS index IMCS is shown in Table 5. Please refer to the above introduction and do not repeat it here.

[0392] The embodiment of the present disclosure uses the upper 2 bits of the DCI modulation and coding scheme MCS as the first bit field, and flexibly indicates the number of Msg4 repetitions through the upper 2 bits of the DCI modulation and coding scheme MCS, thereby ensuring that the DCI length remains unchanged and maintaining compatibility with related protocols.

[0393] Optionally, the method further includes:

[0394] A plurality of redundancy versions are sent to the terminal.

[0395] Specifically, the network side may send multiple redundancy versions on multiple time domain resources according to the redundancy version sequence.

[0396] Optionally, the redundant version sequence is "0, 2, 3, 1", that is, multiple redundant version transmissions are performed cyclically according to the redundant version sequence of "0 2 3 1".

[0397] In a possible implementation, Table 6 is a redundancy version information table provided in an embodiment of the present disclosure, and the redundancy version applied to the n-th transmission of a TB can be determined by Table 6.

[0398] For example, the starting time domain resource of Msg4 is slot 1, the number of repetitions is 4, and the redundancy version of the first TB transmission is 2.

[0399] The network side sends the redundant version of rv on slot 1. id 2, the redundant version of rv sent on slot 2 id 3, the redundant version of rv sent on slot 3 id 1, the redundant version of rv sent on slot 4 id is 0.

[0400] It should be understood that the above examples are provided to facilitate understanding of the present disclosure and should not constitute any limitation to the present disclosure.

[0401] According to the method for enhancing the downlink service channel in the random access process provided by the embodiment of the present disclosure, the network side can send multiple redundant versions in multiple consecutive time slots, so as to obtain coding gain.

[0402] Optionally, the method further includes:

[0403] A reference signal received power (RSRP) threshold is sent to the terminal, where the RSRP threshold is used by the terminal to determine whether to repeatedly transmit Msg4.

[0404] For the introduction of RSRP threshold, please refer to the above introduction and will not be repeated here.

[0405] The method for enhancing the downlink traffic channel during random access provided by the disclosed embodiments determines whether repeated Msg4 transmission is required based on RSRP. RSRP represents signal strength, and combines signal strength with the need for repeated Msg4 transmission: when RSRP is below an RSRP threshold, the signal strength is low, the probability of access failure is high, and repeated Msg4 transmission is required. The RSRP threshold configured by the network side is used by the terminal to determine whether repeated Msg4 transmission is required, thereby avoiding resource waste caused by repeated Msg4 transmission when signal strength is high and the probability of successful access is high.

[0406] The following describes a method for enhancing a downlink service channel in a random access process provided by an embodiment of the present disclosure in conjunction with multiple embodiments.

[0407] Embodiment 1: FIG3 is a flow chart of a third method for enhancing a downlink traffic channel during a random access process provided by an embodiment of the present disclosure. As shown in FIG3 , an embodiment of the present disclosure provides a method for enhancing a downlink traffic channel during a random access process, including:

[0408] The terminal determines whether to repeatedly transmit Msg4, for example, by judging whether the RSRP reaches an RSRP threshold.

[0409] Case 1: When the terminal determines to retransmit Msg4, the terminal sends Msg1 on a dedicated random access resource to request the network side to retransmit Msg4;

[0410] Send Msg3 to the network side according to relevant technologies (i.e., Msg3 does not carry request indication information);

[0411] Receive the indication information sent by the network side, which may include the number of Msg4 repetitions, the time-frequency domain resources corresponding to Msg4 (starting time-frequency domain resources), etc. According to the indication of the network side, receive Msg4 on at least one time-frequency domain resource.

[0412] Case 2: When the terminal determines not to retransmit Msg4, the terminal sends Msg1 on a non-dedicated random access resource;

[0413] Send Msg3 to the network side according to relevant technologies (i.e., Msg3 does not carry request indication information);

[0414] Receive indication information sent by the network side, where the indication information may include time-frequency domain resources corresponding to Msg4, etc., and receive Msg4 on a time-frequency domain resource.

[0415] Embodiment 2: FIG4 is a fourth flow chart of a method for enhancing a downlink traffic channel during a random access process provided by an embodiment of the present disclosure. As shown in FIG4 , an embodiment of the present disclosure provides a method for enhancing a downlink traffic channel during a random access process, including:

[0416] The terminal determines whether to repeatedly transmit Msg4, for example, by judging whether the RSRP reaches an RSRP threshold.

[0417] Case 1: When the terminal determines to repeatedly transmit Msg4, the terminal sends Msg1 to the network side. In this embodiment, there is no limitation on the sending of Msg1.

[0418] The terminal sends Msg3 to the network side. Msg3 carries request indication information, and the request indication information is used to request the network side to repeat the transmission of Msg4.

[0419] Exemplarily, if the bit value of the bit used to indicate the request indication information is 1, it indicates that Msg4 is repeated and the terminal requests the network side to repeatedly transmit Msg4.

[0420] Receive the indication information sent by the network side, which may include the number of Msg4 repetitions, the time-frequency domain resources corresponding to Msg4 (starting time-frequency domain resources), etc. According to the indication of the network side, receive Msg4 on at least one time-frequency domain resource.

[0421] Case 2: When the terminal determines not to repeatedly transmit Msg4, the terminal sends Msg1 to the network side. In this embodiment, there is no limitation on the sending of Msg1.

[0422] The terminal sends Msg3 to the network:

[0423] In a possible implementation, Msg3 may not carry request indication information.

[0424] In a possible implementation, the bit value of the bit used to indicate the request indication information is 0, indicating that there is no Msg4 repeat request.

[0425] Receive indication information sent by the network side, where the indication information may include a time-frequency domain resource corresponding to Msg4, and receive Msg4 on a time-frequency domain resource indicated by the network side.

[0426] Embodiment 3: FIG5 is a fifth flow chart of a method for enhancing a downlink traffic channel during a random access process provided by an embodiment of the present disclosure. As shown in FIG5 , an embodiment of the present disclosure provides a method for enhancing a downlink traffic channel during a random access process, including:

[0427] The network side determines whether the Msg4 repeat request sent by the terminal is received based on Msg1, such as whether the resource used by Msg1 is a dedicated random access resource to determine whether the Msg4 repeat request sent by the terminal is received. When the resource used by Msg1 is a dedicated random access resource, the Msg4 repeat request sent by the terminal is received, and the terminal requests repeated transmission of Msg4; when the resource used by Msg1 is a non-dedicated random access resource, it is determined that the Msg4 repeat request sent by the terminal is not received, and the terminal does not request repeated transmission of Msg4.

[0428] Case 1: When the terminal requests repeated transmission of Msg4, the network side sends the DCI through the PDCCH of Msg2 to indicate the number of repetitions of Msg4;

[0429] The network side performs PDCCH transmission of Msg4. In this embodiment, there is no limitation on the PDCCH transmission of Msg4.

[0430] The network side sends Msg4 on at least one time-frequency domain resource.

[0431] Case 2: When the terminal requests repeated transmission of Msg4, the network side sends the PDCCH of Msg2. In this embodiment, there is no limitation on the PDCCH transmission of Msg2.

[0432] The DCI sent by the network side through the PDCCH of Msg4 indicates the number of repetitions of Msg4;

[0433] The network side sends Msg4 on at least one time-frequency domain resource.

[0434] Case 3: When the terminal determines not to repeatedly transmit Msg4, the network side sends the PDCCH of Msg2. In this embodiment, there is no limitation on the PDCCH transmission of Msg2.

[0435] The network side sends the PDCCH of Msg4. In this embodiment, there is no limitation on the PDCCH sending of Msg4.

[0436] The network side sends Msg4 on a time-frequency domain resource.

[0437] Embodiment 4: FIG6 is a sixth flow chart of a method for enhancing a downlink traffic channel during a random access process provided by an embodiment of the present disclosure. As shown in FIG6 , an embodiment of the present disclosure provides a method for enhancing a downlink traffic channel during a random access process, including:

[0438] The network side determines whether it has received the Msg4 repeat request sent by the terminal based on Msg3, such as by whether Msg3 carries request indication information and whether the request indication information indicates that the terminal requests Msg4 to be transmitted repeatedly.

[0439] Case 1: When the terminal requests repeated transmission of Msg4, the network side sends the DCI through the PDCCH of Msg4 to indicate the number of repetitions of Msg4;

[0440] The network side sends Msg4 on at least one time-frequency domain resource.

[0441] Case 2: When the terminal determines not to repeatedly transmit Msg4, the network side sends the PDCCH of Msg4. In this embodiment, there is no limitation on the PDCCH transmission of Msg4.

[0442] The network side sends Msg4 on a time-frequency domain resource.

[0443] Embodiment 5:

[0444] The terminal determines whether to repeat the transmission of message 4Msg4;

[0445] In the case of determining to repeat the transmission of Msg4, the terminal sends a Msg4 repeat request to the network side, where the Msg4 repeat request is used to request the network side to repeat the transmission of Msg4;

[0446] When the network side receives a message 4 Msg4 repeat request sent by the terminal, it configures repeated sending of Msg4 based on the Msg4 repeat request;

[0447] Optionally, configuring repeated sending of Msg4 based on the Msg4 repeat request includes:

[0448] Determining the number of Msg4 repetitions based on the Msg4 repetition request;

[0449] Sending Msg4 to the terminal on at least one time-frequency domain resource according to the number of repetitions of Msg4.

[0450] Optionally, the method further includes:

[0451] Send the Msg4 repetition number to the terminal.

[0452] The network side sends Msg4 on at least one time-frequency domain resource; the terminal receives Msg4 on at least one time-frequency domain resource according to the instruction of the network side.

[0453] The disclosed embodiment obtains coding gain through repeated transmission, solves the problem that some terminals cannot meet access requirements due to power limitations, insufficient link budget, etc., and improves the success rate of terminal access in one go.

[0454] FIG7 is a schematic diagram of a structure of a downlink traffic channel enhancement device in a random access process provided by an embodiment of the present disclosure. As shown in FIG7 , an embodiment of the present disclosure provides a downlink traffic channel enhancement device in a random access process, which can be applied to a terminal, including:

[0455] A transmission determination unit 710 is configured to determine to repeat transmission of Msg4;

[0456] The request sending unit 720 is configured to send a Msg4 repeat request to the network side, where the Msg4 repeat request is used to request the network side to repeatedly send Msg4.

[0457] Optionally, the determining to perform repeated transmission of Msg4 includes:

[0458] Measure reference signal received power RSRP;

[0459] When the RSRP is lower than the RSRP threshold configured on the network side, it is determined to perform repeated transmission of Msg4.

[0460] Optionally, the sending of the Msg4 repeat request to the network side includes:

[0461] Indicating the Msg4 repeat request by sending a Msg1 using a dedicated random access resource, the dedicated random access resource being associated with the Msg4 repeat request; or

[0462] The request indication information is sent through Msg3, where the request indication information is used to instruct the Msg4 to repeat the request.

[0463] Optionally, the dedicated random access resource includes at least one of the following: a preamble code type, a time domain resource, or a frequency domain resource.

[0464] Optionally, the device further includes a first receiving unit, wherein the first receiving unit is configured to:

[0465] Receive the number of repetitions of Msg4 sent by the network side;

[0466] Receive the Msg4 sent by the network side according to the number of repetitions of the Msg4.

[0467] Optionally, the receiving, according to the number of repetitions of the Msg4, the Msg4 sent by the network side includes:

[0468] Determining at least one time-frequency domain resource according to the number of repetitions of the Msg4;

[0469] On the at least one time-frequency domain resource, receive Msg4 sent by the network side.

[0470] Optionally, the number of repetitions of Msg4 is indicated by the first bit field in downlink control information DCI;

[0471] The receiving the number of repetitions of Msg4 sent by the network side includes:

[0472] Receiving the DCI sent by the network side through a physical downlink control channel PDCCH scrambled by a random access radio network temporary identifier RA-RNTI; or

[0473] The DCI is received from the network side through a physical downlink control channel PDCCH scrambled by a temporary cell radio network temporary identifier TC-RNTI.

[0474] Optionally, the first bit field is used to indicate the number of Msg4 repetitions in the candidate Msg4 repetition number; or

[0475] The bit value of the first bit field is associated with a preset number of repetitions of Msg4.

[0476] Optionally, the first bit field is an extended DCI bit field, a DCI reserved bit field, or the upper 2 bits of a DCI modulation and coding scheme MCS.

[0477] Optionally, the device further includes: a redundant version processing unit, configured to receive multiple redundant versions and merge the multiple redundant versions.

[0478] The methods and devices provided in each embodiment of the present disclosure are based on the same application concept. Since the downlink service channel enhancement method applied in the random access process of the terminal and the downlink service channel enhancement device applied in the random access process of the terminal solve the problem in a similar principle and can achieve the same technical effect, the implementation of the device and the method can refer to each other, and the repeated parts will not be repeated.

[0479] FIG8 is a second structural diagram of a downlink traffic channel enhancement device during a random access process provided by an embodiment of the present disclosure. As shown in FIG8 , an embodiment of the present disclosure provides a downlink traffic channel enhancement device during a random access process, which can be applied to a network device, including:

[0480] A request receiving unit 810 is configured to receive a message 4 Msg4 repeat request sent by a terminal, wherein the Msg4 repeat request is used to request repeated sending of Msg4;

[0481] The Msg4 sending unit 820 is configured to send Msg4 to the terminal based on the Msg4 repeat request.

[0482] Optionally, the receiving the Msg4 repeat request sent by the terminal includes:

[0483] receiving a message 1 Msg1 sent by the terminal, and determining, when a resource used by the terminal to send the Msg1 is a dedicated random access resource, that the terminal requests to repeatedly send Msg4, the dedicated random access resource being associated with the Msg4 repetition request; or

[0484] Receive message 3 Msg3 sent by the terminal, and determine, based on the request indication information carried in Msg3, that the terminal requests to repeatedly send Msg4.

[0485] Optionally, the dedicated random access resource includes at least one of the following: a preamble code type, a time domain resource, or a frequency domain resource.

[0486] Optionally, the sending Msg4 to the terminal based on the Msg4 repeat request includes:

[0487] Determining the number of Msg4 repetitions based on the Msg4 repetition request;

[0488] Sending Msg4 to the terminal on at least one time-frequency domain resource according to the number of repetitions of Msg4.

[0489] Optionally, the device further includes a second sending unit, the second sending unit being configured to

[0490] Send the Msg4 repetition number to the terminal.

[0491] Optionally, the number of repetitions of Msg4 is indicated by the first bit field in downlink control information DCI;

[0492] The sending of the Msg4 repetition number to the terminal includes:

[0493] Sending the DCI to the terminal via a physical downlink control channel PDCCH scrambled by a random access radio network temporary identifier RA-RNTI; or

[0494] The DCI is sent to the terminal through a physical downlink control channel PDCCH scrambled by a temporary cell-radio network temporary identifier TC-RNTI.

[0495] Optionally, the first bit field is used to indicate the number of Msg4 repetitions in the candidate Msg4 repetition number; or

[0496] The bit value of the first bit field is associated with a preset number of repetitions of Msg4.

[0497] Optionally, the first bit field is an extended DCI bit field, a DCI reserved bit field, or the upper 2 bits of a DCI modulation and coding scheme MCS.

[0498] Optionally, the apparatus further includes a redundant version sending unit, configured to send multiple redundant versions to the terminal.

[0499] Optionally, the device further includes an RSRP sending threshold unit, wherein the RSRP threshold sending unit is configured to send a reference signal received power RSRP threshold to the terminal, wherein the RSRP threshold is used by the terminal to determine whether to perform repeated Msg4 transmission.

[0500] The methods and devices provided in each embodiment of the present disclosure are based on the same application concept. Since the downlink service channel enhancement method applied in the random access process of a network device and the downlink service channel enhancement device applied in the random access process of a network device solve problems based on similar principles and can achieve the same technical effects, the implementation of the device and the method can refer to each other, and the repeated parts will not be repeated.

[0501] It should be noted that the division of units in the embodiments of the present disclosure is schematic and is merely a logical functional division. In actual implementation, other division methods may be used. Furthermore, the functional units in the various embodiments of the present disclosure may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0502] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a processor-readable storage medium. Based on this understanding, the technical solution of the present disclosure is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor to execute all or part of the steps of the method described in each embodiment of the present disclosure. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0503] FIG9 is a schematic structural diagram of a terminal provided by an embodiment of the present disclosure. As shown in FIG9 , the terminal includes a memory 920 , a transceiver 900 , and a processor 910 ; wherein the processor 910 and the memory 920 may also be physically arranged separately.

[0504] The memory 920 is used to store computer programs; the transceiver 900 is used to send and receive data under the control of the processor 910; the processor 910 calls the computer program stored in the memory 920 to perform operations corresponding to any of the downlink traffic channel enhancement methods applied to the random access process of the terminal provided in the embodiments of the present disclosure according to the obtained executable instructions, for example:

[0505] Determine to repeat transmission of message 4Msg4;

[0506] Send a Msg4 repeat request to the network side, where the Msg4 repeat request is used to request the network side to repeatedly send Msg4.

[0507] In FIG9 , the bus interface 940 may include any number of interconnected buses and bridges, specifically connecting various circuits such as one or more processors represented by the processor 910 and the memory represented by the memory 920. The bus interface 940 may also connect various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described herein. The bus interface provides an interface. The transceiver 900 may include multiple components, namely, a transmitter and a receiver, providing a unit for communicating with various other devices over a transmission medium, such as a wireless channel, a wired channel, an optical cable, and the like. For different terminals, a user interface 930 may also be included. The user interface 930 may also be an interface capable of connecting external or internal devices. Connected devices include, but are not limited to, a keypad, a display, a speaker, a microphone, a joystick, and the like.

[0508] The processor 910 is responsible for managing the bus architecture and general processing, and the memory 920 can store data used by the processor 910 when performing operations.

[0509] Optionally, the processor 910 may be a central processing unit (CPU), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), or a complex programmable logic device (CPLD), and the processor may also adopt a multi-core architecture.

[0510] Optionally, the determining to perform repeated transmission of Msg4 includes:

[0511] Measure reference signal received power RSRP;

[0512] When the RSRP is lower than the RSRP threshold configured on the network side, it is determined to perform repeated transmission of Msg4.

[0513] Optionally, the sending of the Msg4 repeat request to the network side includes:

[0514] Indicating the Msg4 repeat request by sending a Msg1 using a dedicated random access resource, the dedicated random access resource being associated with the Msg4 repeat request; or

[0515] The request indication information is sent through message 3Msg3, where the request indication information is used to instruct the Msg4 to repeat the request.

[0516] Optionally, the dedicated random access resource includes at least one of the following: a preamble code type, a time domain resource, or a frequency domain resource.

[0517] Optionally, the operation further includes:

[0518] Receive the number of repetitions of Msg4 sent by the network side;

[0519] Receive the Msg4 sent by the network side according to the number of repetitions of the Msg4.

[0520] Optionally, the receiving, according to the number of repetitions of the Msg4, the Msg4 sent by the network side includes:

[0521] Determining at least one time-frequency domain resource according to the number of repetitions of the Msg4;

[0522] On the at least one time-frequency domain resource, receive Msg4 sent by the network side.

[0523] Optionally, the number of repetitions of Msg4 is indicated by the first bit field in downlink control information DCI;

[0524] The receiving the number of repetitions of Msg4 sent by the network side includes:

[0525] Receiving the DCI sent by the network side through a physical downlink control channel PDCCH scrambled by a random access radio network temporary identifier RA-RNTI; or

[0526] The DCI is received from the network side through a physical downlink control channel PDCCH scrambled by a temporary cell radio network temporary identifier TC-RNTI.

[0527] Optionally, the first bit field is used to indicate the number of Msg4 repetitions in the candidate Msg4 repetition number; or

[0528] The bit value of the first bit field is associated with a preset number of repetitions of Msg4.

[0529] Optionally, the first bit field is an extended DCI bit field, a DCI reserved bit field, or the upper 2 bits of a DCI modulation and coding scheme MCS.

[0530] Optionally, the operation further includes:

[0531] A plurality of redundancy versions are received, and the plurality of redundancy versions are merged.

[0532] It should be noted here that the above-mentioned terminal provided in the embodiment of the present disclosure can implement all the method steps implemented in the above-mentioned embodiment of the downlink service channel enhancement method applied to the random access process of the terminal, and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as those of the method embodiment will not be described in detail here.

[0533] FIG10 is a schematic diagram of the structure of a network device provided in an embodiment of the present disclosure. As shown in FIG10 , the network device includes a memory 1020, a transceiver 1000, and a processor 1010, wherein:

[0534] The memory 1020 is used to store computer programs; the transceiver 1000 is used to send and receive data under the control of the processor 1010; the processor 1010 is used to read the computer program in the memory 1020 and perform the following operations:

[0535] A Msg4 repeat request of message 4 sent by a receiving terminal, wherein the Msg4 repeat request is used to request repeated sending of Msg4;

[0536] Based on the Msg4 repetition request, Msg4 is sent to the terminal.

[0537] In FIG10 , the bus architecture may include any number of interconnected buses and bridges, specifically various circuits linked together by one or more processors represented by processor 1010 and memory represented by memory 1020. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described herein. The bus interface 1030 provides an interface. The transceiver 1000 may be a plurality of components, namely, a transmitter and a receiver, providing a unit for communicating with various other devices over a transmission medium, such as a wireless channel, a wired channel, an optical cable, or the like. The processor 1010 is responsible for managing the bus architecture and general processing, and the memory 1020 may store data used by the processor 1010 when performing operations.

[0538] Optionally, the processor 1010 may be a central processing unit (CPU), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or a complex programmable logic device (CPLD), and the processor may also adopt a multi-core architecture.

[0539] Optionally, the receiving the Msg4 repeat request sent by the terminal includes:

[0540] receiving a message 1 Msg1 sent by the terminal, and determining, when a resource used by the terminal to send the Msg1 is a dedicated random access resource, that the terminal requests to repeatedly send Msg4, the dedicated random access resource being associated with the Msg4 repetition request; or

[0541] Receive message 3 Msg3 sent by the terminal, and determine, based on the request indication information carried in Msg3, that the terminal requests to repeatedly send Msg4.

[0542] Optionally, the dedicated random access resource includes at least one of the following: a preamble code type, a time domain resource, or a frequency domain resource.

[0543] Optionally, the sending Msg4 to the terminal based on the Msg4 repeat request includes:

[0544] Determining the number of Msg4 repetitions based on the Msg4 repetition request;

[0545] Sending Msg4 to the terminal on at least one time-frequency domain resource according to the number of repetitions of Msg4.

[0546] Optionally, the operation further includes:

[0547] Send the Msg4 repetition number to the terminal.

[0548] Optionally, the number of repetitions of Msg4 is indicated by the first bit field in downlink control information DCI;

[0549] The sending of the Msg4 repetition number to the terminal includes:

[0550] Sending the DCI to the terminal via a physical downlink control channel PDCCH scrambled by a random access radio network temporary identifier RA-RNTI; or

[0551] The DCI is sent to the terminal through a physical downlink control channel PDCCH scrambled by a temporary cell-radio network temporary identifier TC-RNTI.

[0552] Optionally, the first bit field is used to indicate the number of Msg4 repetitions in the candidate Msg4 repetition number; or

[0553] The bit value of the first bit field is associated with a preset number of repetitions of Msg4.

[0554] Optionally, the first bit field is an extended DCI bit field, a DCI reserved bit field, or the upper 2 bits of a DCI modulation and coding scheme MCS.

[0555] Optionally, the operation further includes:

[0556] A plurality of redundancy versions are sent to the terminal.

[0557] Optionally, the operation further includes:

[0558] A reference signal received power (RSRP) threshold is sent to the terminal, where the RSRP threshold is used by the terminal to determine whether to perform repeated transmission of Msg4.

[0559] It should be noted here that the above-mentioned network device provided in the embodiment of the present disclosure can implement all the method steps implemented in the above-mentioned downlink service channel enhancement method embodiment in the random access process applied to the network side, and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as those in the method embodiment will not be described in detail here.

[0560] In some embodiments, a non-transitory readable storage medium is also provided, which stores a computer program, and the computer program is used to enable the processor to execute the downlink service channel enhancement method in the random access process provided by the above-mentioned method embodiments.

[0561] Specifically, the above-mentioned non-transitory readable storage medium provided by the embodiment of the present disclosure can implement all the method steps implemented by the above-mentioned method embodiments, and can achieve the same technical effects. The parts and beneficial effects of this embodiment that are the same as the method embodiment will not be described in detail here.

[0562] The non-transitory readable storage medium can be any available medium or data storage device that can be accessed by the processor, including but not limited to magnetic storage (such as floppy disks, hard disks, magnetic tapes, magneto-optical disks (MO)), optical storage (such as CDs, DVDs, BDs, HVDs, etc.), and semiconductor storage (such as ROMs, EPROMs, EEPROMs, non-volatile memories (NAND FLASH), solid-state drives (SSDs)), etc.

[0563] In some embodiments, a processor-readable storage medium is further provided, wherein the processor-readable storage medium stores a computer program, and the computer program is used to enable the processor to execute the downlink service channel enhancement method in the random access process provided by the above-mentioned method embodiments.

[0564] Specifically, the processor-readable storage medium provided in the embodiment of the present disclosure can implement all the method steps implemented in the above-mentioned method embodiments and can achieve the same technical effects. The parts and beneficial effects of this embodiment that are the same as those of the method embodiment will not be described in detail here.

[0565] In some embodiments, a computer-readable storage medium is further provided, wherein the computer-readable storage medium stores a computer program, and the computer program is used to enable a computer to execute the downlink service channel enhancement method in the random access process provided by the above-mentioned method embodiments.

[0566] Specifically, the above-mentioned computer-readable storage medium provided by the embodiment of the present disclosure can implement all the method steps implemented by the above-mentioned method embodiments, and can achieve the same technical effects. The parts and beneficial effects of this embodiment that are the same as the method embodiment will not be described in detail here.

[0567] In some embodiments, a communication device is further provided, in which a computer program is stored, and the computer program is used to enable the communication device to execute the downlink service channel enhancement method in the random access process provided by the above-mentioned method embodiments.

[0568] Specifically, the above-mentioned communication device provided by the embodiment of the present disclosure can implement all the method steps implemented by the above-mentioned method embodiments, and can achieve the same technical effects. The parts and beneficial effects of this embodiment that are the same as the method embodiment will not be described in detail here.

[0569] In some embodiments, a chip product is further provided, in which a computer program is stored. The computer program is used to enable the chip product to execute the downlink service channel enhancement method in the random access process provided by the above-mentioned method embodiments.

[0570] Specifically, the above-mentioned chip product provided by the embodiment of the present disclosure can implement all the method steps implemented by the above-mentioned method embodiments, and can achieve the same technical effects. The parts and beneficial effects of this embodiment that are the same as the method embodiment will not be described in detail here.

[0571] Those skilled in the art will appreciate that the embodiments of the present disclosure may be provided as methods, systems, or computer program products. Therefore, the present disclosure may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Furthermore, the present disclosure may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage and optical storage, etc.) containing computer-usable program code.

[0572] The present disclosure is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present disclosure. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer-executable instructions. These computer-executable instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device produce a device for implementing the functions specified in one or more processes in the flowchart and / or one or more boxes in the block diagram.

[0573] These processor-executable instructions may also be stored in a processor-readable memory that can direct a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the processor-readable memory produce a product including an instruction device that implements the functions specified in one or more processes in the flowchart and / or one or more boxes in the block diagram.

[0574] These processor-executable instructions may also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, whereby the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one or more processes in the flowchart and / or one or more boxes in the block diagram.

[0575] Obviously, those skilled in the art may make various changes and modifications to the present disclosure without departing from the spirit and scope of the present disclosure. Thus, if these modifications and variations of the present disclosure fall within the scope of the claims of the present disclosure and their equivalents, the present disclosure is intended to include these modifications and variations.

Claims

1. A method for enhancing a downlink service channel in a random access process, applied to a terminal, comprising: Determine to repeat transmission of message 4Msg4; Send a Msg4 repeat request to the network side, where the Msg4 repeat request is used to request the network side to repeatedly send Msg4.

2. The method for enhancing downlink traffic channels in a random access process according to claim 1, wherein: The determining to perform repeated transmission of Msg4 includes: Measure reference signal received power RSRP; When the RSRP is lower than the RSRP threshold configured on the network side, it is determined to perform repeated transmission of Msg4.

3. The method for enhancing downlink traffic channels in a random access process according to claim 1, wherein: The sending of the Msg4 repeat request to the network side includes: Indicating the Msg4 repeat request by using a Msg1 sent using a dedicated random access resource, the dedicated random access resource being associated with the Msg4 repeat request; or The request indication information is sent through message 3Msg3, and the request indication information is used to indicate that the Msg4 repeats the request.

4. The method for enhancing downlink traffic channels in a random access process according to claim 3, wherein: The dedicated random access resource includes at least one of the following: a preamble code type, a time domain resource, or a frequency domain resource.

5. The method for enhancing downlink traffic channels in a random access process according to claim 1, wherein: The method further comprises: Receive the number of repetitions of Msg4 sent by the network side; Receive Msg4 sent by the network side according to the number of repetitions of Msg4.

6. The method for enhancing downlink traffic channels in a random access process according to claim 5, wherein: The receiving, according to the number of repetitions of the Msg4, the Msg4 sent by the network side, comprises: Determine at least one time-frequency domain resource according to the number of repetitions of the Msg4; On the at least one time-frequency domain resource, receive Msg4 sent by the network side.

7. The method for enhancing downlink traffic channels in a random access process according to claim 5, wherein: The number of repetitions of Msg4 is indicated by the first bit field in the downlink control information DCI; The receiving the number of repetitions of Msg4 sent by the network side includes: Receiving the DCI sent by the network side through a physical downlink control channel PDCCH scrambled by a random access radio network temporary identifier RA-RNTI; or The DCI sent by the network side through a physical downlink control channel PDCCH scrambled by a temporary cell-radio network temporary identifier TC-RNTI is received.

8. The method for enhancing downlink traffic channels in a random access process according to claim 7, wherein: The first bit field is used to indicate the number of repetitions of Msg4 in the candidate number of repetitions of Msg4; or The bit value of the first bit field is associated with a preset number of repetitions of Msg4.

9. The method for enhancing downlink traffic channels in a random access process according to claim 7, wherein: The first bit field is an extended DCI bit field, a DCI reserved bit field or high 2 bits of a DCI modulation and coding scheme MCS.

10. The method for enhancing downlink traffic channels in a random access process according to any one of claims 1 to 9, wherein: The method further comprises: A plurality of redundancy versions are received, and the plurality of redundancy versions are merged.

11. A method for enhancing a downlink service channel in a random access process, applied to a network side, comprising: A message 4 Msg4 repeat request sent by a receiving terminal, wherein the Msg4 repeat request is used to request to repeatedly send Msg4; Based on the Msg4 repeat request, Msg4 is sent to the terminal.

12. The method for enhancing downlink traffic channels in a random access process according to claim 11, wherein: The receiving the Msg4 repeat request sent by the terminal includes: receiving a message 1 Msg1 sent by the terminal, and determining, when a resource used by the terminal to send the Msg1 is a dedicated random access resource, that the terminal requests to repeatedly send Msg4, wherein the dedicated random access resource is associated with the Msg4 repetition request; or Receive message 3 Msg3 sent by the terminal, and determine, based on the request indication information carried in the Msg3, that the terminal requests to repeatedly send Msg4.

13. The method for enhancing downlink traffic channels in a random access process according to claim 12, wherein: The dedicated random access resource includes at least one of the following: a preamble code type, a time domain resource, or a frequency domain resource.

14. The method for enhancing downlink traffic channels in a random access process according to claim 11, wherein: The sending Msg4 to the terminal based on the Msg4 repeat request includes: Based on the Msg4 repetition request, determine the number of Msg4 repetitions; According to the number of repetitions of the Msg4, Msg4 is sent to the terminal on at least one time-frequency domain resource.

15. The method for enhancing downlink traffic channels in a random access process according to claim 14, wherein: The method further comprises: Send the Msg4 repetition number to the terminal.

16. The method for enhancing downlink traffic channels in a random access process according to claim 15, wherein: The number of repetitions of Msg4 is indicated by the first bit field in the downlink control information DCI; The sending of the Msg4 repetition number to the terminal comprises: Sending the DCI to the terminal via a physical downlink control channel PDCCH scrambled by a random access radio network temporary identifier RA-RNTI; or The DCI is sent to the terminal through a physical downlink control channel PDCCH scrambled by a temporary cell-radio network temporary identifier TC-RNTI.

17. The method for enhancing downlink traffic channels in a random access process according to claim 16, wherein: The first bit field is used to indicate the number of repetitions of Msg4 in the candidate number of repetitions of Msg4; or The bit value of the first bit field is associated with a preset number of repetitions of Msg4.

18. The method for enhancing downlink traffic channels in a random access process according to claim 16, wherein: The first bit field is an extended DCI bit field, a DCI reserved bit field or high 2 bits of a DCI modulation and coding scheme MCS.

19. The method for enhancing downlink traffic channels in a random access process according to any one of claims 11 to 18, wherein: The method further comprises: A plurality of redundancy versions are sent to the terminal.

20. The method for enhancing downlink traffic channels in a random access process according to any one of claims 11 to 18, wherein: The method further comprises: A reference signal received power RSRP threshold is sent to the terminal, where the RSRP threshold is used by the terminal to determine whether to repeatedly transmit Msg4.

21. A terminal comprising a memory, a transceiver and a processor: The memory is used to store a computer program; the transceiver is used to send and receive data under the control of the processor; the processor is used to read the computer program in the memory and perform the following operations: Determine to repeat transmission of message 4Msg4; Send a Msg4 repeat request to the network side, where the Msg4 repeat request is used to request the network side to repeatedly send Msg4.

22. The terminal according to claim 21, wherein: The determining to perform repeated transmission of Msg4 includes: Measure reference signal received power RSRP; When the RSRP is lower than the RSRP threshold configured on the network side, it is determined to perform repeated transmission of Msg4.

23. The terminal according to claim 21, wherein: The sending of the Msg4 repeat request to the network side includes: The Msg1 sent using the dedicated random access resource indicates that the Msg4 is repeated. request, the dedicated random access resource is associated with the Msg4 repeat request; or The request indication information is sent through message 3Msg3, and the request indication information is used to indicate that the Msg4 repeats the request.

24. The terminal according to claim 23, wherein: The dedicated random access resource includes at least one of the following: a preamble code type, a time domain resource, or a frequency domain resource.

25. The terminal according to claim 21, wherein: The operations also include: Receive the number of repetitions of Msg4 sent by the network side; Receive Msg4 sent by the network side according to the number of repetitions of Msg4.

26. The terminal according to claim 25, wherein: The receiving, according to the number of repetitions of the Msg4, the Msg4 sent by the network side, comprises: Determine at least one time-frequency domain resource according to the number of repetitions of the Msg4; On the at least one time-frequency domain resource, receive Msg4 sent by the network side.

27. The terminal according to claim 25, wherein: The number of repetitions of Msg4 is indicated by the first bit field in the downlink control information DCI; The receiving the number of repetitions of Msg4 sent by the network side includes: Receiving the DCI sent by the network side through a physical downlink control channel PDCCH scrambled by a random access radio network temporary identifier RA-RNTI; or The DCI sent by the network side through a physical downlink control channel PDCCH scrambled by a temporary cell-radio network temporary identifier TC-RNTI is received.

28. The terminal according to claim 27, wherein: The first bit field is used to indicate the number of repetitions of Msg4 in the candidate number of repetitions of Msg4; or The bit value of the first bit field is associated with a preset number of repetitions of Msg4.

29. The terminal according to claim 27, wherein: The first bit field is an extended DCI bit field, a DCI reserved bit field or high 2 bits of a DCI modulation and coding scheme MCS.

30. The terminal according to any one of claims 21 to 29, wherein: The operations also include: A plurality of redundancy versions are received, and the plurality of redundancy versions are merged.

31. A network device comprising a memory, a transceiver and a processor: The memory is used to store a computer program; the transceiver is used to send and receive data under the control of the processor; the processor is used to read the computer program in the memory and perform the following operations: A message 4 Msg4 repeat request sent by a receiving terminal, wherein the Msg4 repeat request is used to request to repeatedly send Msg4; Based on the Msg4 repeat request, Msg4 is sent to the terminal.

32. The network device according to claim 31, wherein: The receiving the Msg4 repeat request sent by the terminal includes: receiving a message 1 Msg1 sent by the terminal, and determining, when a resource used by the terminal to send the Msg1 is a dedicated random access resource, that the terminal requests to repeatedly send Msg4, wherein the dedicated random access resource is associated with the Msg4 repetition request; or Receive message 3 Msg3 sent by the terminal, and determine, based on the request indication information carried in the Msg3, that the terminal requests to repeatedly send Msg4.

33. The network device according to claim 32, wherein: The dedicated random access resource includes at least one of the following: a preamble code type, a time domain resource, or a frequency domain resource.

34. The network device according to claim 31, wherein: The sending Msg4 to the terminal based on the Msg4 repeat request includes: Based on the Msg4 repetition request, determine the number of Msg4 repetitions; According to the number of repetitions of the Msg4, Msg4 is sent to the terminal on at least one time-frequency domain resource.

35. The network device according to claim 34, wherein: The operations also include: Send the Msg4 repetition number to the terminal.

36. The network device according to claim 35, wherein: The number of repetitions of Msg4 is indicated by the first bit field in the downlink control information DCI; The sending of the Msg4 repetition number to the terminal comprises: Sending the DCI to the terminal via a physical downlink control channel PDCCH scrambled by a random access radio network temporary identifier RA-RNTI; or The DCI is sent to the terminal through a physical downlink control channel PDCCH scrambled by a temporary cell-radio network temporary identifier TC-RNTI.

37. The network device according to claim 36, wherein: The first bit field is used to indicate the number of repetitions of Msg4 in the candidate number of repetitions of Msg4; or The bit value of the first bit field is associated with a preset number of repetitions of Msg4.

38. The network device according to claim 36, wherein: The first bit field is an extended DCI bit field, a DCI reserved bit field or high 2 bits of a DCI modulation and coding scheme MCS.

39. The network device according to any one of claims 31 to 38, wherein: The operations also include: A plurality of redundancy versions are sent to the terminal.

40. The network device according to any one of claims 31 to 38, wherein: The operations also include: A reference signal received power RSRP threshold is sent to the terminal, where the RSRP threshold is used by the terminal to determine whether to repeatedly transmit Msg4.

41. A downlink service channel enhancement device in a random access process, applied to a terminal, comprising: A transmission determination unit, used for determining to repeat transmission of message 4Msg4; The request sending unit is used to send a Msg4 repeat request to the network side, and the Msg4 repeat request is used to request the network side to repeatedly send Msg4.

42. The device for enhancing downlink traffic channels in a random access process according to claim 41, wherein: The transmission determination unit is specifically configured to: Measure reference signal received power RSRP; When the RSRP is lower than the RSRP threshold configured on the network side, it is determined to perform repeated transmission of Msg4.

43. The device for enhancing downlink traffic channels in a random access process according to claim 41, wherein: The request sending unit is specifically used for: Indicating the Msg4 repeat request by using a Msg1 sent using a dedicated random access resource, the dedicated random access resource being associated with the Msg4 repeat request; or The request indication information is sent through message 3Msg3, and the request indication information is used to indicate that the Msg4 repeats the request.

44. The device for enhancing downlink traffic channels in a random access process according to claim 43, wherein: The dedicated random access resource includes at least one of the following: a preamble code type, a time domain resource, or a frequency domain resource.

45. The device for enhancing downlink traffic channels in a random access process according to claim 41, wherein: The device further includes a first receiving unit, wherein the first receiving unit is configured to: Receive the number of repetitions of Msg4 sent by the network side; Receive Msg4 sent by the network side according to the number of repetitions of Msg4.

46. ​​The device for enhancing downlink traffic channels in a random access process according to claim 45, wherein: The first receiving unit is further configured to: Determine at least one time-frequency domain resource according to the number of repetitions of the Msg4; On the at least one time-frequency domain resource, receive Msg4 sent by the network side.

47. The device for enhancing downlink traffic channels in a random access process according to claim 45, wherein: The number of repetitions of Msg4 is indicated by the first bit field in the downlink control information DCI; The first receiving unit is further configured to: Receiving the DCI sent by the network side through a physical downlink control channel PDCCH scrambled by a random access radio network temporary identifier RA-RNTI; or The DCI sent by the network side through a physical downlink control channel PDCCH scrambled by a temporary cell-radio network temporary identifier TC-RNTI is received.

48. The device for enhancing downlink traffic channels in a random access process according to claim 47, wherein: The first bit field is used to indicate the number of repetitions of Msg4 in the candidate number of repetitions of Msg4; or The bit value of the first bit field is associated with a preset number of repetitions of Msg4.

49. The device for enhancing downlink traffic channels in a random access process according to claim 47, wherein: The first bit field is an extended DCI bit field, a DCI reserved bit field or high 2 bits of a DCI modulation and coding scheme MCS.

50. The device for enhancing downlink traffic channels in a random access process according to any one of claims 41 to 47, wherein: The apparatus further comprises: a redundant version processing unit, wherein the redundant version processing unit is configured to: A plurality of redundancy versions are received, and the plurality of redundancy versions are merged.

51. A downlink service channel enhancement device in a random access process, applied to a network side, comprising: A request receiving unit, used for receiving a message 4 Msg4 repeat request sent by a terminal, wherein the Msg4 repeat request is used for requesting to repeatedly send Msg4; The Msg4 sending unit is used to send Msg4 to the terminal based on the Msg4 repeat request.

52. The device for enhancing downlink traffic channels in a random access process according to claim 51, wherein: The request receiving unit is specifically used for: receiving a message 1 Msg1 sent by the terminal, and determining, when a resource used by the terminal to send the Msg1 is a dedicated random access resource, that the terminal requests to repeatedly send Msg4, wherein the dedicated random access resource is associated with the Msg4 repetition request; or Receive message 3 Msg3 sent by the terminal, and determine, based on the request indication information carried in the Msg3, that the terminal requests to repeatedly send Msg4.

53. The device for enhancing downlink traffic channels in a random access process according to claim 52, wherein: The dedicated random access resource includes at least one of the following: a preamble code type, a time domain resource, or a frequency domain resource.

54. The device for enhancing downlink traffic channels in a random access process according to claim 51, wherein: The Msg4 sending unit is specifically used for: Based on the Msg4 repetition request, determine the number of Msg4 repetitions; According to the number of repetitions of the Msg4, Msg4 is sent to the terminal on at least one time-frequency domain resource.

55. The device for enhancing downlink traffic channels in a random access process according to claim 54, wherein: The device further includes a second sending unit, wherein the second sending unit is configured to: Send the Msg4 repetition number to the terminal.

56. The device for enhancing downlink traffic channels in a random access process according to claim 55, wherein: The number of repetitions of Msg4 is indicated by the first bit field in the downlink control information DCI; The second sending unit is further used for: Sending the DCI to the terminal via a physical downlink control channel PDCCH scrambled by a random access radio network temporary identifier RA-RNTI; or The DCI is sent to the terminal through a physical downlink control channel PDCCH scrambled by a temporary cell-radio network temporary identifier TC-RNTI.

57. The device for enhancing downlink traffic channels in a random access process according to claim 56, wherein: The first bit field is used to indicate the number of repetitions of Msg4 in the candidate number of repetitions of Msg4; or The bit value of the first bit field is associated with a preset number of repetitions of Msg4.

58. The device for enhancing downlink traffic channels in a random access process according to claim 56, wherein: The first bit field is an extended DCI bit field, a DCI reserved bit field or high 2 bits of a DCI modulation and coding scheme MCS.

59. The device for enhancing downlink traffic channels in a random access process according to any one of claims 51 to 58, wherein: The apparatus further includes a redundant version sending unit, wherein the redundant version sending unit is configured to: A plurality of redundancy versions are sent to the terminal.

60. The device for enhancing downlink traffic channels in a random access process according to any one of claims 51 to 58, wherein: The device further includes an RSRP threshold sending unit, and the RSRP threshold sending unit is used to: A reference signal received power RSRP threshold is sent to the terminal, where the RSRP threshold is used by the terminal to determine whether to repeatedly transmit Msg4.

61. A non-transitory readable storage medium storing a computer program, wherein the computer program is used to enable a processor to execute the downlink service channel enhancement method in the random access process as described in any one of claims 1 to 10.

62. A non-transitory readable storage medium storing a computer program, wherein the computer program is used to enable a processor to execute the method for enhancing downlink service channels in a random access process as described in any one of claims 11 to 20.

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