Random access method, apparatus, terminal and network side device

Abstract

The application provides a random access method, device, terminal and network side equipment. The method comprises the following steps: acquiring first configuration information sent by a network side equipment, wherein the first configuration information is used for indicating whether a synchronization signal block (SSB) supports coverage enhancement; and performing Msg3 repeated sending according to the first configuration information and selecting the SSB supporting coverage enhancement. By using the method, the terminal can select a random access process of performing Msg3 repeated sending according to the first configuration information sent by the network side equipment and indicating whether the synchronization signal block (SSB) supports coverage enhancement, so that the problem of resource waste can be avoided.

Description

Technical Field

[0001] This application relates to the field of wireless technology, and in particular to a random access method, apparatus, terminal and network-side equipment. Background Technology

[0002] Currently, to achieve coverage enhancement, the Coverage Enhancement (CovEnh) feature has been introduced. With CovEnh, the UE (User Equipment) repeatedly transmits Msg3 via the Physical Uplink Shared Channel (PUSCH), increasing the likelihood of connecting to the base station gNB even at the cell edge. To this end, an independent Reference Signal Receiving Power (RSRP) threshold is introduced as a first threshold. The CovEnh UE uses this first threshold to determine whether to perform Msg3 retransmission. Existing technologies currently primarily focus on Msg3 retransmission in the 4-step Contention Based Random Access (4-step CBRA) type.

[0003] During the CovEnh UE random access resource selection process, when selecting a Synchronization Signal Block (SSB), if the Synchronization Signal-Reference Signal Received Power (SS-RSRP) of all SSBs is less than or equal to the RSRP threshold rsrp-ThresholdSSB of the SSB, an SSB is arbitrarily selected for random access. If the RSRP of the corresponding downlink path loss reference is less than or equal to the first threshold, a 4-step CBRA Msg3 repetition process is performed during random access.

[0004] In the existing technology, the above-mentioned Msg3 repeat process applies to all SSBs. However, Msg3 repeat will occupy a relatively large amount of random access resources. When the SS-RSRP corresponding to all SSBs is less than or equal to rsrp-ThresholdSSB, if all SSBs support Msg3 repeat transmission, there will be a problem of resource waste, and it will also affect the information transmission of traditional terminal UEs. Summary of the Invention

[0005] To address the aforementioned technical problems, the purpose of this application is to provide a random access method, apparatus, terminal, and network-side equipment to solve the problem of resource waste caused by the repeated transmission of Msg3 when performing random access in the existing CovEnh UE.

[0006] This application provides a random access method, wherein the method includes:

[0007] Obtain first configuration information sent by the network-side device, wherein the first configuration information is used to indicate whether the Synchronization Signal Block (SSB) supports coverage enhancement;

[0008] Based on the first configuration information, select an SSB that supports coverage enhancement to perform repeated Msg3 transmission.

[0009] Optionally, in the random access method, the first configuration information includes one or more of the following:

[0010] The first indication information is used to indicate the SSB that supports coverage enhancement;

[0011] The second indication information is used to indicate SSBs that do not support coverage enhancement;

[0012] The third indication information is used to indicate whether the Synchronization Signal Block (SSB) supports coverage enhancement.

[0013] The first threshold corresponds to the SSB configuration that supports coverage enhancement; the first threshold is a threshold for a first measurement parameter used to determine whether the SSB performs Msg3 retransmission.

[0014] Specific transport resources that support SSB configurations with enhanced coverage;

[0015] A second threshold corresponding to the SSB configuration that supports coverage enhancement; the second threshold is a threshold for a second measurement parameter used for SSB selection.

[0016] Optionally, the random access method further includes:

[0017] Obtain one or more first thresholds sent by the network-side device, wherein the first threshold is a threshold for a first measurement parameter used to determine whether the SSB performs Msg3 retransmission.

[0018] Optionally, in the random access method, the step of selecting an SSB that supports coverage enhancement to perform repeated Msg3 transmission based on the first configuration information includes:

[0019] Based on the measurement results of the SSB and the first threshold, determine whether the first measurement parameter in the measurement results of the SSB meets the first threshold;

[0020] If the first measurement parameter of the SSB meets the first threshold, and the second measurement parameter in the measurement result of the SSB meets the preset condition, the SSB that supports coverage enhancement is selected, and Msg3 is repeatedly transmitted.

[0021] Optionally, in the random access method, when a first threshold is obtained from the network-side device, all SSBs supporting coverage enhancement indicated by the first configuration information correspond to the first threshold.

[0022] When multiple first thresholds are obtained from the network-side device, if the SSB meets the first condition, the SSB that supports coverage enhancement indicated by the first configuration information corresponds to one of the multiple first thresholds; or, if the SSB meets the second condition, the SSB that supports coverage enhancement indicated by the first configuration information corresponds to other first thresholds among the multiple first thresholds besides the one mentioned above.

[0023] Optionally, in the random access method, the first condition is that the second measurement parameter of each SSB is less than or equal to the second threshold; or, the second condition is that at least one SSB has a second measurement parameter greater than the second threshold.

[0024] Optionally, in the random access method, the preset conditions include one of the following:

[0025] The second measurement parameter of each SSB is less than or equal to the second threshold;

[0026] There exists at least one second measurement parameter of the SSB that is greater than the second threshold.

[0027] Optionally, in the random access method, when the second measurement parameter of each SSB is less than or equal to the second threshold, the step of selecting the SSB that supports coverage enhancement to perform Msg3 retransmission includes:

[0028] Among the SSBs that support coverage enhancement indicated in the first configuration information, select one of the SSBs and perform Msg3 retransmission; or

[0029] Choose any one of the SSBs as the selected SSB;

[0030] Determine whether the selected SSB is the SSB that supports coverage enhancement as indicated by the first configuration information;

[0031] If the selected SSB is an SSB that supports coverage enhancement, Msg3 retransmission is performed using the selected SSB.

[0032] Optionally, in the random access method, if at least one SSB's second measurement parameter is greater than the second threshold, the step of selecting the SSB supporting coverage enhancement to perform Msg3 retransmission includes:

[0033] From the SSBs whose second measurement parameter is greater than the second threshold, select the SSB that supports coverage enhancement as indicated by the first configuration information, and perform Msg3 retransmission; or

[0034] From the SSBs whose second measurement parameter is greater than the second threshold, arbitrarily select one SSB as the selected SSB;

[0035] Determine whether the selected SSB is the SSB that supports coverage enhancement as indicated by the first configuration information;

[0036] When the selected SSB is an SSB that supports coverage enhancement, Msg3 retransmission is performed using the selected SSB.

[0037] Optionally, the random access method further includes:

[0038] If the selected SSB is not the SSB that supports coverage enhancement as indicated by the first configuration information, Msg3 retransmission will not be performed.

[0039] Optionally, the random access method further includes:

[0040] If the measurement result of the SSB does not meet the first threshold, Msg3 will not be retransmitted.

[0041] This application embodiment also provides a random access method, wherein the method is executed by a network-side device, and the method includes:

[0042] Send first configuration information to the terminal, the first configuration information being used to indicate whether the synchronization signal block (SSB) supports coverage enhancement.

[0043] Optionally, in the random access method, the first configuration information includes one or more of the following:

[0044] The first indication information is used to indicate the SSB that supports coverage enhancement;

[0045] The second indication information is used to indicate SSBs that do not support coverage enhancement;

[0046] The third indication information is used to indicate whether the synchronization signal block SSB supports coverage enhancement; the first threshold corresponding to the SSB configuration that supports coverage enhancement; the first threshold is a threshold for determining whether the SSB performs Msg3 retransmission of the first measurement parameter;

[0047] Specific transport resources that support SSB configurations with enhanced coverage;

[0048] A second threshold corresponding to the SSB configuration that supports coverage enhancement; the second threshold is a threshold for a second measurement parameter used for SSB selection.

[0049] Optionally, the random access method further includes:

[0050] Send one or more first thresholds to the terminal, wherein the first threshold is a threshold for determining whether the SSB performs Msg3 retransmission of a first measurement parameter.

[0051] Optionally, in the random access method, when a first threshold is sent to the terminal, all SSBs supporting coverage enhancement indicated by the first configuration information correspond to the first threshold;

[0052] When multiple first thresholds are sent to the terminal, if the SSB meets the first condition, the SSB that supports coverage enhancement indicated by the first configuration information corresponds to one of the multiple first thresholds; or, if the SSB meets the second condition, the SSB that supports coverage enhancement indicated by the first configuration information corresponds to other first thresholds among the multiple first thresholds besides the one first threshold.

[0053] Optionally, in the random access method, the first condition is that the second measurement parameter of each SSB is less than or equal to the second threshold; or, the second condition is that at least one SSB has a second measurement parameter greater than the second threshold.

[0054] This application also provides a terminal, which includes a memory, a transceiver, and a processor:

[0055] A memory for storing computer programs; a transceiver for sending and receiving data under the control of the processor; and a processor for reading the computer programs from the memory and performing the following operations:

[0056] Obtain first configuration information sent by the network-side device, wherein the first configuration information is used to indicate whether the Synchronization Signal Block (SSB) supports coverage enhancement;

[0057] Based on the first configuration information, select an SSB that supports coverage enhancement to perform repeated Msg3 transmission.

[0058] Optionally, in the terminal, the first configuration information includes one or more of the following:

[0059] The first indication information is used to indicate the SSB that supports coverage enhancement;

[0060] The second indication information is used to indicate SSBs that do not support coverage enhancement;

[0061] The third indication information is used to indicate whether the synchronization signal block SSB supports coverage enhancement; the first threshold corresponding to the SSB configuration that supports coverage enhancement; the first threshold is a threshold for determining whether the SSB performs Msg3 retransmission of the first measurement parameter;

[0062] Specific transport resources that support SSB configurations with enhanced coverage;

[0063] A second threshold corresponding to the SSB configuration that supports coverage enhancement; the second threshold is a threshold for a second measurement parameter used for SSB selection.

[0064] Optionally, in the terminal, the processor is further configured to:

[0065] Obtain one or more first thresholds sent by the network-side device, wherein the first threshold is a threshold for a first measurement parameter used to determine whether the SSB performs Msg3 retransmission.

[0066] Optionally, in the terminal, the processor selects an SSB that supports coverage enhancement to perform repeated Msg3 transmission based on the first configuration information, including:

[0067] Based on the measurement results of the SSB and the first threshold, determine whether the first measurement parameter in the measurement results of the SSB meets the first threshold;

[0068] If the first measurement parameter of the SSB meets the first threshold, and the second measurement parameter in the measurement result of the SSB meets the preset condition, the SSB that supports coverage enhancement is selected, and Msg3 is repeatedly transmitted.

[0069] Optionally, in the terminal, when the processor obtains a first threshold sent by the network-side device, all SSBs supporting coverage enhancement indicated by the first configuration information correspond to the first threshold;

[0070] When the processor acquires multiple first thresholds sent by the network-side device, if the SSB meets the first condition, the SSB that supports coverage enhancement indicated by the first configuration information corresponds to one of the multiple first thresholds; or, if the SSB meets the second condition, the SSB that supports coverage enhancement indicated by the first configuration information corresponds to other first thresholds among the multiple first thresholds besides the one first threshold.

[0071] Optionally, in the terminal, the first condition is that the second measurement parameter of each SSB is less than or equal to the second threshold; or, the second condition is that at least one SSB has a second measurement parameter greater than the second threshold.

[0072] Optionally, in the terminal, the preset conditions include one of the following:

[0073] The second measurement parameter of each SSB is less than or equal to the second threshold;

[0074] There exists at least one second measurement parameter of the SSB that is greater than the second threshold.

[0075] Optionally, in the terminal, where the processor selects an SSB that supports coverage enhancement to perform Msg3 retransmission when the second measurement parameter of each SSB is less than or equal to a second threshold, the process includes:

[0076] Among the SSBs that support coverage enhancement indicated in the first configuration information, select one of the SSBs and perform Msg3 retransmission; or

[0077] Choose any one of the SSBs as the selected SSB;

[0078] Determine whether the selected SSB is the SSB that supports coverage enhancement as indicated by the first configuration information;

[0079] If the selected SSB is an SSB that supports coverage enhancement, Msg3 retransmission is performed using the selected SSB.

[0080] Optionally, in the terminal, if the processor selects an SSB that supports coverage enhancement to perform Msg3 retransmission when at least one SSB's second measurement parameter is greater than the second threshold, the process includes:

[0081] From the SSBs whose second measurement parameter is greater than the second threshold, select the SSB that supports coverage enhancement as indicated by the first configuration information, and perform Msg3 retransmission; or

[0082] From the SSBs whose second measurement parameter is greater than the second threshold, arbitrarily select one SSB as the selected SSB;

[0083] Determine whether the selected SSB is the SSB that supports coverage enhancement as indicated by the first configuration information;

[0084] When the selected SSB is an SSB that supports coverage enhancement, Msg3 retransmission is performed using the selected SSB.

[0085] Optionally, in the terminal, the processor is further configured to:

[0086] If the selected SSB is not the SSB that supports coverage enhancement as indicated by the first configuration information, Msg3 retransmission will not be performed.

[0087] Optionally, in the terminal, the processor is further configured to:

[0088] If the measurement result of the SSB does not meet the first threshold, Msg3 will not be retransmitted.

[0089] This application also provides a network-side device, which includes a memory, a transceiver, and a processor.

[0090] A memory for storing computer programs; a transceiver for sending and receiving data under the control of the processor; and a processor for reading the computer programs from the memory and performing the following operations:

[0091] Send first configuration information to the terminal, the first configuration information being used to indicate whether the synchronization signal block (SSB) supports coverage enhancement.

[0092] Optionally, in the network-side device, the first configuration information includes one or more of the following:

[0093] The first indication information is used to indicate the SSB that supports coverage enhancement;

[0094] The second indication information is used to indicate SSBs that do not support coverage enhancement;

[0095] The third indication information is used to indicate whether the synchronization signal block SSB supports coverage enhancement; the first threshold corresponding to the SSB configuration that supports coverage enhancement; the first threshold is a threshold for determining whether the SSB performs Msg3 retransmission of the first measurement parameter;

[0096] Specific transport resources that support SSB configurations with enhanced coverage;

[0097] A second threshold corresponding to the SSB configuration that supports coverage enhancement; the second threshold is a threshold for a second measurement parameter used for SSB selection.

[0098] Optionally, in the network-side device, the processor is further configured to:

[0099] Send one or more first thresholds to the terminal, wherein the first threshold is a threshold for determining whether the SSB performs Msg3 retransmission of a first measurement parameter.

[0100] Optionally, in the network-side device, when the processor sends a first threshold to the terminal, all SSBs supporting coverage enhancement indicated by the first configuration information correspond to the first threshold.

[0101] When the processor sends multiple first thresholds to the terminal, if the SSB meets the first condition, the SSB that supports coverage enhancement indicated by the first configuration information corresponds to one of the multiple first thresholds; or, if the SSB meets the second condition, the SSB that supports coverage enhancement indicated by the first configuration information corresponds to other first thresholds among the multiple first thresholds besides the one first threshold.

[0102] Optionally, in the network-side device, the first condition is that the second measurement parameter of each SSB is less than or equal to the second threshold; or, the second condition is that at least one SSB has a second measurement parameter greater than the second threshold.

[0103] This application embodiment also provides a random access device, wherein the device is executed by a terminal, and the device includes:

[0104] The information acquisition module is used to acquire first configuration information sent by the network-side device, wherein the first configuration information is used to indicate whether the synchronization signal block (SSB) supports coverage enhancement.

[0105] The processing module is configured to select an SSB that supports coverage enhancement and perform repeated Msg3 transmission based on the first configuration information.

[0106] This application embodiment also provides a random access device, wherein the random access is executed by a network-side device, and the device includes:

[0107] The information sending module is used to send first configuration information to the terminal, wherein the first configuration information is used to indicate whether the synchronization signal block (SSB) supports coverage enhancement.

[0108] This application also provides a processor-readable storage medium storing a computer program for causing the processor to execute the random access method as described in any of the preceding claims.

[0109] The beneficial effects of the above technical solution in this application are as follows:

[0110] In the above scheme, based on the first configuration information sent by the network-side device to indicate whether the synchronization signal block (SSB) supports coverage enhancement, the terminal can select some SSBs to perform a random access procedure for repeated Msg3 transmission, thus avoiding resource waste. Attached Figure Description

[0111] Figure 1 This is a flowchart illustrating the random access method according to one embodiment of this application;

[0112] Figure 2 A flowchart illustrating the resource selection process during random access, as described in Implementation Method 1.

[0113] Figure 3 A flowchart illustrating the resource selection process during random access, in Implementation Method Two;

[0114] Figure 4 A schematic diagram illustrating the repeated 4-step CBRA process for executing Msg3;

[0115] Figure 5 This is a flowchart illustrating an embodiment of the random access method described in this application;

[0116] Figure 6 This is a flowchart illustrating a second embodiment of the random access method described in this application;

[0117] Figure 7 This is a flowchart illustrating a third embodiment of the random access method described in this application;

[0118] Figure 8 This is a flowchart illustrating a fourth embodiment of the random access method described in this application;

[0119] Figure 9 This is a flowchart illustrating a fifth embodiment of the random access method described in this application;

[0120] Figure 10 This is a flowchart illustrating a sixth embodiment of the random access method described in this application;

[0121] Figure 11 This is a flowchart illustrating the random access method according to another embodiment of this application;

[0122] Figure 12 This is a schematic diagram of the structure of the terminal described in the embodiments of this application;

[0123] Figure 13 This is a schematic diagram of the network-side device described in an embodiment of this application;

[0124] Figure 14 This is a schematic diagram of the structure of the random access device according to one embodiment of this application;

[0125] Figure 15 This is a schematic diagram of the structure of a random access device according to another embodiment of this application. Detailed Implementation

[0126] In the embodiments of this application, the term "and / or" describes the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone.

[0127] In the embodiments of this application, the term "multiple" refers to two or more, and other quantifiers are similar.

[0128] The technical solutions provided in this application can be applied to various systems, especially 5G systems. For example, applicable systems include Global System for Mobile Communication (GSM), Code Division Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA) General Packet Radio Service (GPRS), Long Term Evolution (LTE), LTE Frequency Division Duplex (FDD), LTE Time Division Duplex (TDD), Long Term Evolution Advanced (LTE-A), Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX), and 5G New Radio (NR). All of these systems include terminal equipment and network equipment. The systems may also include a core network component, such as Evolved Packet System (EPS) and 5G system (5GS).

[0129] The terminal devices involved in the embodiments of this application can be devices that provide voice and / or data connectivity to users, handheld devices with wireless connectivity, or other processing devices connected to a wireless modem. The names of the terminal devices may differ in different systems; for example, in a 5G system, a terminal device can be called User Equipment (UE). Wireless terminal devices can communicate with one or more core networks (CNs) via a Radio Access Network (RAN). Wireless terminal devices can be mobile terminal devices, such as mobile phones (or "cellular" phones) and computers with mobile terminal devices, for example, portable, pocket-sized, handheld, computer-embedded, or vehicle-mounted mobile devices that exchange voice and / or data with the RAN. Examples include Personal Communication Service (PCS) phones, cordless phones, Session Initiated Protocol (SIP) phones, Wireless Local Loop (WLL) stations, and Personal Digital Assistants (PDAs). Wireless terminal equipment can also be referred to as a system, subscriber unit, subscriber station, mobile station, mobile station, remote station, access point, remote terminal, access terminal, user terminal, user agent, or user device, but is not limited to these terms in the embodiments of this application.

[0130] The network device involved in this application embodiment can be a base station, which may include multiple cells providing services to terminals. Depending on the specific application, a base station may also be called an access point, or a device in an access network that communicates with a wireless terminal device through one or more sectors on the air interface, or other names. The network device can be used to exchange received air frames with Internet Protocol (IP) packets, acting as a router between the wireless terminal device and the rest of the access network, where the rest of the access network may include an Internet Protocol (IP) communication network. The network device can also coordinate the attribute management of the air interface. For example, the network equipment involved in the embodiments of this application can be a base transceiver station (BTS) in a Global System for Mobile communications (GSM) or Code Division Multiple Access (CDMA), a NodeB in a Wide-band Code Division Multiple Access (WCDMA) system, an evolved Node B (eNB or e-NodeB) in a long term evolution (LTE) system, a 5G base station (gNB) in a 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 this application. In some network structures, the network equipment may include centralized unit (CU) nodes and distributed unit (DU) nodes, and the centralized unit and distributed unit may be geographically separated.

[0131] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0132] To address the issue that while the existing Msg3 repeat process applies to all SSBs, it consumes a significant amount of random access resources. Furthermore, when the SS-RSRP corresponding to all SSBs is less than or equal to rsrp-ThresholdSSB, if all SSBs support Msg3 repeat transmission, there will be resource waste and it will also affect the information transmission of traditional UE terminals. Therefore, this application provides a random access method.

[0133] like Figure 1 As shown, in one embodiment of this application, the random access method is executed by a terminal, and the method includes:

[0134] S110, Obtain first configuration information sent by the network-side device; the first configuration information is used to indicate whether the Synchronization Signal Block (SSB) supports coverage enhancement.

[0135] S120, based on the first configuration information, select an SSB that supports coverage enhancement to perform repeated transmission of Msg3.

[0136] Using the random access method described in this application embodiment, the terminal performs Msg3 retransmission based on the first configuration information sent by the network-side device to indicate whether the synchronization signal block (SSB) supports coverage enhancement. The terminal can select some SSBs to perform the random access process of Msg3 retransmission, thus avoiding the problem of resource waste.

[0137] Currently, the purpose of introducing the coverage enhancement CovEnh feature is to achieve coverage enhancement. CovEnh UEs, through Msg3PUSCH retransmission, have a higher probability of connecting to the gNB even when at the cell edge. Optionally, in this embodiment, Msg3 retransmission is mainly applied to 4-step CBRA type random access.

[0138] The random access method described in this application, taking Msg3 repeated transmission applied to 4-step CBRA as an example, will be described in detail for specific implementation of the method described in this application.

[0139] Specifically, the Msg3 retransmission process for performing 4-step CBRA includes a resource selection process and a 4-step CBRA for Msg3 retransmission. In one embodiment, the resource selection process includes the following steps:

[0140] S210, network-side devices configure random access parameters via RRC;

[0141] S220, Carrier Selection;

[0142] If the carrier used for random access is explicitly indicated, then that carrier is selected to perform the random access procedure;

[0143] If no carrier is explicitly designated for random access, and the serving cell is configured to support Supplementary Uplink Carrier (SUL), then: if the RSRP of the downlink path loss is less than the RSRP threshold parameter rsrp-ThresholdSSB-SUL used to select SUL or Normal Uplink Carrier (NUL), the SUL carrier is selected for the random access procedure; otherwise, the NUL carrier is selected for the random access procedure.

[0144] S230, Random Access Channel (RACH) type selection;

[0145] Since the CovEnh scenario primarily focuses on the 4-step CBRA process, the random access type RA_TYPE is set to 4-stepRA.

[0146] S240, SSB selection;

[0147] S250, Preamble selection;

[0148] Based on the SSB selected in step S240, select the associated Preamble and set the Preamble Index PREAMBLE_INDEX to the selected Preamble;

[0149] S260, execute the random access procedure.

[0150] In the prior art, in step S210, when the network-side device configures random access parameters via RRC, the configured parameters include a first threshold, which is a threshold for determining whether the SSB performs Msg3 retransmission. Optionally, the first measurement parameter can be a downlink path loss parameter calculated based on a second measurement parameter. The second measurement parameter includes at least one of Reference Signal Received Power (RSRP), Reference Signal Received Quality (RSRQ), and Received Signal Strength Indication (RSSI). The first measurement parameter is a downlink path loss parameter calculated based on at least one of the second measurement parameters.

[0151] For example, when the second measurement parameter includes RSRP, the first measurement parameter can be the RSRP of downlink path loss, and the first threshold is a threshold value of the RSRP of downlink path loss.

[0152] Furthermore, in the prior art, during the random access procedure in step S260, based on the SSB measurement results, there is at least one SSB whose corresponding second measurement parameter (e.g., the synchronization signal reference signal received power SS-RSRP) is greater than the second threshold (optionally, the SSB rsrp threshold rsrp-ThresholdSSB). There is no provision regarding whether to perform Msg3 retransmission, thus the process is incomplete. If, based on the SSB measurement results, the measurement parameters of all SSBs are less than or equal to the second threshold, then it is further determined whether the first measurement parameter of the selected SSB determined in step S240 (optionally, the downlink path loss RSRP) is greater than the first threshold. If the downlink path loss RSRP of the selected SSB is greater than the first threshold, the usual 4-step CBRA procedure is performed, i.e., Msg3 retransmission is not performed. If the downlink path loss RSRP of the selected SSB is less than or equal to the first threshold, the 4-step CBRA Msg3 retransmission procedure is performed.

[0153] It should be noted that, in the embodiments of this application, the second threshold is not limited to the threshold of SSB rsrp, but can be at least one of the threshold of SSB rsrp, the threshold of SSB RSRQ, and the threshold of SSB RSSI.

[0154] Another implementation of the resource selection process in this application embodiment is as follows: Figure 3 As shown, it includes the following steps:

[0155] S310, network-side devices configure random access parameters via RRC;

[0156] S320, Carrier Selection;

[0157] If the carrier used for random access is explicitly indicated, then that carrier is selected to perform the random access procedure;

[0158] If no carrier is explicitly designated for random access, and the serving cell is configured to support SUL, then: if the downlink path loss RSRP is less than the RSRP threshold parameter rsrp-ThresholdSSB-SUL used to select SUL or NUL, the SUL carrier is selected for the random access procedure; otherwise, the NUL carrier is selected for the random access procedure.

[0159] S330, RACH type selection;

[0160] Since the CovEnh scenario mainly focuses on the 4-step CBRA process, the random access type RA_TYPE is set to 4-stepRA.

[0161] S340, based on the SSB measurement result and the first threshold, determine whether the SSB measurement result meets the Msg3 repeated transmission condition;

[0162] The first threshold is a threshold for a first measurement parameter used to determine whether to perform Msg3 retransmission; optionally, the first measurement parameter is a downlink path loss calculated based on a second measurement parameter; wherein the second measurement parameter includes at least one of RSRP, RSRQ, and RSSI. The first measurement parameter is a downlink path loss calculated based on at least one of the second measurement parameters.

[0163] For example, taking the first threshold as the threshold of the RSRP of downlink path loss, according to the SSB measurement result, if the RSRP value of the reference signal received power of downlink path loss is greater than the first threshold, it is determined that the SSB measurement result does not meet the Msg3 retransmission condition, and then step S350 is executed; if the RSRP value of the reference signal received power of downlink path loss is less than or equal to the first threshold, it is determined that the SSB measurement result meets the Msg3 retransmission condition, and then step S360 is executed.

[0164] S350, select SSB and Preamble, and perform the usual 4-step CBRA procedure, that is, do not perform Msg3 repeated transmission;

[0165] S360 selects an SSB that supports coverage enhancement based on preset conditions met by the SSB measurement results;

[0166] S370, Preamble option;

[0167] Optionally, when performing Preamble selection in steps S350 and S370 respectively, if the selected SSB is the SSB that supports coverage enhancement as indicated by the first configuration information, a Preamble for random access is selected from the first Preamble set;

[0168] If the selected SSB is not the SSB that supports coverage enhancement as indicated by the first configuration information, a Preamble for random access is selected from the second Preamble set.

[0169] The first Preamble set is a specific Preamble set used for coverage enhancement; the second Preamble set is a specific Preamble set used for traditional 4-step RA based on base station contention.

[0170] S380, execute Msg3 to repeat the 4-step CBRA process.

[0171] Optionally, the procedure for performing Msg3 to repeat the 4-step CBRA process is as follows: Figure 4 As shown, the steps include:

[0172] S410, the UE sends Msg1, which includes the selected Preamble;

[0173] S420, the network-side device sends Msg2 to the UE, which includes a Random Access Response (RAR) message, and the RAR message includes the relevant resource configuration for repeated transmission of Msg3;

[0174] S430, using the resources indicated by S420, the UE repeatedly transmits Msg3 during a random access process;

[0175] S440, the network-side device sends Msg4 to the UE, and the UE completes the contention-based random access procedure based on the contention resolution identifier sent by the network-side device.

[0176] The random access method described in this application embodiment differs from existing random access methods in that the network-side device sends first configuration information to the terminal. This first configuration indication information is used to indicate whether the SSB supports coverage enhancement. Based on the first configuration information, the terminal performs repeated transmission of Msg3 through an SSB that supports coverage enhancement when performing random access.

[0177] Optionally, the first configuration information includes at least one of the following:

[0178] The first indication information is used to indicate the SSB that supports coverage enhancement;

[0179] The second indication information is used to indicate SSBs that do not support coverage enhancement;

[0180] The third indication information is used to indicate whether the synchronization signal block SSB supports coverage enhancement; the first threshold corresponding to the SSB configuration that supports coverage enhancement; the first threshold is a threshold for determining whether the SSB performs Msg3 retransmission of the first measurement parameter;

[0181] Specific transport resources that support SSB configurations with enhanced coverage;

[0182] A second threshold corresponding to the SSB configuration that supports coverage enhancement; the second threshold is a threshold for a second measurement parameter used for SSB selection.

[0183] In one implementation, optionally, when the first configuration information includes first indication information, second indication information, third indication information, or a first threshold corresponding to a portion of the SSB configuration, it is combined with... Figure 2 As shown, the first configuration information can be sent to the terminal simultaneously when the network-side device configures random access parameters via RRC.

[0184] The following describes how the first configuration information is used to indicate whether the SSB supports coverage enhancement.

[0185] Implementation Method 1

[0186] The first configuration information includes first indication information for indicating an SSB that supports coverage enhancement; or, it includes second indication information for indicating an SSB that does not support coverage enhancement; or it includes third indication information for indicating whether the SSB supports coverage enhancement.

[0187] Optionally, the first indication information can be a first identifier, indicating SSBs that support coverage enhancement via a bitmap. For example, if the bitmap identifier corresponding to the SSB is a first value, it indicates that the corresponding SSB supports coverage enhancement. The second indication information can be a second identifier, indicating SSBs that do not support coverage enhancement via a bitmap. For example, if the bitmap identifier corresponding to the SSB is a second value, it indicates that the corresponding SSB does not support coverage enhancement. The third indication information can be a third identifier, indicating whether an SSB supports coverage enhancement via a bitmap. For example, if the bitmap identifier corresponding to the SSB is a first value, it indicates that the SSB supports coverage enhancement; if the bitmap identifier corresponding to the SSB is a second value, it indicates that the SSB does not support coverage enhancement. It should be noted that the first, second, and third indication information are not limited to indicating SSBs only via bitmaps.

[0188] Optionally, this first configuration information may be indicated by the network-side device when configuring random access parameters via RRC.

[0189] Optionally, when configuring random access parameters via RRC, the network-side device also configures at least one of the following parameters:

[0190] The RSRP threshold rsrp-ThresholdSSB-SUL used to select SUL or NUL;

[0191] The RSRP threshold msgA-RSRP-Threshold used to select between 2-step RA and 4-step RA;

[0192] The second threshold, also known as the threshold for the second measurement parameter used in the 4-step RA to select the SSB, is, for example, the RSRP threshold rsrp-ThresholdSSB.

[0193] The ra-PreambleIndex parameter identifies the random access preamble index of the selected Preamble;

[0194] A first threshold; this first threshold is a threshold for a first measurement parameter used to determine whether to perform Msg3 retransmission; based on the above, the first measurement parameter is a downlink path loss parameter calculated based on a second measurement parameter; wherein, the second measurement parameter includes at least one of RSRP, RSRQ, and RSSI. The first measurement parameter is a downlink path loss parameter calculated based on at least one of the second measurement parameters.

[0195] In this embodiment, optionally, when the network-side device configures random access parameters via RRC, it also indicates first configuration information. The first configuration information indicates an SSB that supports coverage enhancement through a first indication information, or the first configuration information indicates an SSB that does not support coverage enhancement through a second indication information, or the first configuration information indicates whether the SSB supports coverage enhancement through a third indication information.

[0196] In addition, in this embodiment of the application, the first threshold applies to all SSBs that support coverage enhancement. That is, when performing Msg3 retransmission, if an SSB that supports coverage enhancement is selected, the first threshold is used to determine whether to use the selected SSB to perform Msg3 retransmission.

[0197] Implementation Method 2

[0198] The first configuration information includes a first threshold corresponding to the SSB configuration that supports coverage enhancement. Specifically, in this implementation, the first threshold corresponding to the SSB configuration that supports coverage enhancement is a specific first threshold, that is, a specific first threshold for the SSB configuration that supports coverage enhancement.

[0199] Optionally, in this embodiment, the first configuration information may be indicated by the network-side device when configuring random access parameters via RRC.

[0200] Optionally, when configuring random access parameters via RRC, the network-side device, in addition to the configured first threshold, also configures at least one of the following parameters:

[0201] The RSRP threshold rsrp-ThresholdSSB-SUL used to select SUL or NUL;

[0202] The RSRP threshold msgA-RSRP-Threshold used to select between 2-step RA and 4-step RA;

[0203] RSRP threshold rsrp-ThresholdSSB for 4-step RA selection of SSB;

[0204] The ra-PreambleIndex parameter identifies the random access preamble index of the selected Preamble.

[0205] Optionally, in the first configuration information, a specific first threshold is configured for each SSB that supports coverage enhancement. The first thresholds configured for different SSBs can be the same or different.

[0206] In this implementation method, the terminal determines whether the corresponding SSB is an SSB that supports coverage enhancement based on whether a specific first threshold is configured for the SSB in the random access configuration parameters indicated by the network-side device.

[0207] Implementation Method 3

[0208] The first configuration information includes specific transmission resources corresponding to the SSB configuration that supports coverage enhancement. The corresponding SSB that configures the specific transmission resources is an SSB that supports coverage enhancement. That is, by configuring specific transmission resources for some SSBs, the SSB that can support coverage enhancement is identified.

[0209] Optionally, specific transport resources include Preamble and / or Physical Random Access Channel (PRACH) resources.

[0210] In this implementation, the UE determines whether the selected SSB is an SSB that supports coverage enhancement based on whether the SSB is configured with a specific Preamble or a specific PRACH resource.

[0211] Optionally, in this embodiment, the network-side device can configure different or the same specific transmission resources for different SSBs.

[0212] Implementation Method 4

[0213] The first configuration information includes a second threshold corresponding to the SSB configuration that supports coverage enhancement; the second threshold is a threshold for a second measurement parameter used for SSB selection; optionally, the second measurement parameter includes at least one of SSB rsrp, SSB RSRQ, and SSBRSSI.

[0214] Some SSBs are configured with a specific second threshold, and the corresponding SSBs with the specific second threshold are SSBs that support coverage enhancement.

[0215] In this implementation, the terminal determines whether the selected SSB supports coverage enhancement based on whether a specific second threshold is configured, such as a specific rsrp-ThresholdSSB.

[0216] Optionally, the random access method described in this application embodiment may further include:

[0217] Obtain one or more first thresholds sent by the network-side device; the first threshold is a threshold for a first measurement parameter used to determine whether the SSB performs repeated transmission of Msg3.

[0218] Optionally, when the network-side device configures random access parameters via RRC, the configured parameters include the first threshold.

[0219] One implementation method, such as Figure 2 As shown, in the resource selection process of random access, after the SSB is selected, the first threshold can be used to determine whether to perform Msg3 repeated transmission.

[0220] For example, when the first threshold is the RSRP of the downlink path loss, if the RSRP of the measured downlink path loss of the SSB is greater than the first threshold, the normal 4-step CBRA procedure is performed, that is, Msg3 retransmission is not performed; if the RSRP of the downlink path loss is less than or equal to the first threshold, the 4-step CBRA Msg3 retransmission procedure is performed.

[0221] Optionally, the SSB to be determined can be the SSB with the best signal quality among multiple SSBs, but it is not limited to the SSB with the best signal quality; it can also be determined according to a preset configuration. By comparing the first measurement parameter in the measurement result of this determined SSB with a first threshold, it can be determined whether to perform Msg3 repeated transmission.

[0222] Another implementation, such as Figure 3 As shown, in the resource selection process of random access, before selecting an SSB, it is determined whether the SSB measurement result meets the Msg3 repeated transmission condition based on the SSB measurement result and the first threshold.

[0223] For example, if the reference signal received power (RSRP) value of the downlink path loss is greater than the first threshold, it is determined that the SSB measurement result does not meet the Msg3 retransmission condition; if the reference signal received power (RSRP) value of the downlink path loss is less than or equal to the first threshold, it is determined that the SSB measurement result meets the Msg3 retransmission condition.

[0224] Based on the above, in one embodiment of this application, selecting an SSB that supports coverage enhancement to perform repeated Msg3 transmission according to the first configuration information includes:

[0225] Based on the SSB measurement results and the first threshold, determine whether the first measurement parameter in the SSB measurement results meets the first threshold;

[0226] If the first measurement parameter of the SSB meets the first threshold, the SSB that supports coverage enhancement is selected according to the preset conditions met by the second measurement parameter in the measurement result of the SSB, and Msg3 is repeatedly transmitted.

[0227] Optionally, when a first threshold is obtained from the network-side device, all SSBs that support coverage enhancement indicated by the first configuration information correspond to the first threshold.

[0228] Optionally, when multiple first thresholds sent by the network-side device are obtained, if the SSB meets the first condition, the SSB that supports coverage enhancement indicated by the first configuration information corresponds to one of the multiple first thresholds; or, if the SSB meets the second condition, the SSB that supports coverage enhancement indicated by the first configuration information corresponds to other first thresholds among the multiple first thresholds besides the one first threshold.

[0229] Specifically, when the SSB meets the first condition, the SSB supporting coverage enhancement indicated by the first configuration information corresponds to the first first threshold; when the SSB meets the second condition, the SSB supporting coverage enhancement indicated by the first configuration information corresponds to the second first threshold. The first first threshold and the second second threshold are each any one of a plurality of first thresholds.

[0230] Optionally, when the network-side device sends two of the multiple first thresholds, if the SSB satisfies the first condition, the SSB supporting coverage enhancement indicated by the first configuration information corresponds to one of the two first thresholds; or, if the SSB satisfies the second condition, the SSB supporting coverage enhancement indicated by the first configuration information corresponds to the other of the two first thresholds. In this embodiment, optionally, the first condition is that the second measurement parameter of each SSB is less than or equal to the second threshold; or, the second condition is that at least one SSB has a second measurement parameter greater than the second threshold.

[0231] This implementation method allows for the selection of different first thresholds based on varying conditions met by the SSB measurement results, enabling the determination of whether to perform repeated Msg3 transmission. This avoids the problem of frequent first threshold configuration when SSB conditions change, as only a single first threshold is configured and Msg3 retransmission is performed under different SSB conditions.

[0232] Optionally, according to the embodiments of this application, Figure 3 The preset conditions used to determine the execution of repeated Msg3 transmissions include one of the following:

[0233] The second measurement parameter of each SSB is less than or equal to the second threshold;

[0234] There exists at least one second measurement parameter of the SSB that is greater than the second threshold.

[0235] In this embodiment of the application, under both conditions that the second measurement parameter of each SSB is less than or equal to the second threshold, and at least one SSB has a second measurement parameter greater than the second threshold, the SSB that supports coverage enhancement is selected and Msg3 is repeatedly transmitted.

[0236] Compared to existing technologies, the question of whether Msg3 retransmission and subsequent procedures need to be performed when at least one SSB's second measurement parameter is greater than the second threshold is not perfect. The random access method described in this application clarifies the method for performing Msg3 retransmission under this condition and the method for determining the selected SSB for performing Msg3 retransmission.

[0237] It should be noted that if at least one SSB's second measurement parameter is greater than the second threshold, it can also be stipulated that Msg3 repeated transmission will not be performed.

[0238] Optionally, if the second measurement parameter of each SSB is less than or equal to the second threshold, the selection of the SSB supporting coverage enhancement to perform Msg3 retransmission includes:

[0239] Among the SSBs that support coverage enhancement indicated in the first configuration information, select one of the SSBs and perform Msg3 retransmission; or

[0240] Select any one of the SSBs as the selected SSB;

[0241] Determine whether the selected SSB is the SSB that supports coverage enhancement as indicated by the first configuration information;

[0242] When the selected SSB is an SSB that supports coverage enhancement, Msg3 retransmission is performed using the selected SSB.

[0243] In this implementation, where the second measurement parameter of each SSB is less than or equal to the second threshold, in one embodiment, optionally, one SSB can be randomly selected from the SSBs supporting coverage enhancement indicated by the first configuration information to perform Msg3 repeated transmission; or, one SSB can be randomly selected from the measured SSBs as the selected SSB, and it is determined whether the selected SSB supports coverage enhancement. If the selected SSB supports coverage enhancement, the selected SSB is used to perform Msg3 repeated transmission; if the selected SSB does not support coverage enhancement, Msg3 repeated transmission is not performed.

[0244] Optionally, if at least one SSB's second measurement parameter is greater than the second threshold, the selection of the SSB supporting coverage enhancement to perform Msg3 retransmission includes:

[0245] From the SSBs whose second measurement parameter is greater than the second threshold, select the SSB that supports coverage enhancement as indicated by the first configuration information, and perform Msg3 retransmission; or

[0246] From the SSBs whose second measurement parameter is greater than the second threshold, arbitrarily select one SSB as the selected SSB;

[0247] Determine whether the selected SSB is the SSB that supports coverage enhancement as indicated by the first configuration information;

[0248] When the selected SSB is an SSB that supports coverage enhancement, Msg3 retransmission is performed using the selected SSB.

[0249] In this implementation, when at least one SSB's second measurement parameter is greater than the second threshold, in one embodiment, optionally, an SSB that supports coverage enhancement can be selected from the SSBs whose second measurement parameter is greater than the second threshold, and Msg3 retransmission can be performed; in another embodiment, optionally, an SSB is arbitrarily selected from the SSBs whose second measurement parameter is greater than the second threshold as the selected SSB, and it is determined whether the selected SSB supports coverage enhancement. If the selected SSB supports coverage enhancement, Msg3 retransmission is performed using the selected SSB; if the selected SSB does not support coverage enhancement, Msg3 retransmission is not performed.

[0250] Optionally, the method further includes:

[0251] When the selected SSB is not the SSB that supports coverage enhancement as indicated by the first configuration information, Msg3 retransmission is not performed.

[0252] Optionally, the method further includes:

[0253] If the SSB measurement result does not meet the first threshold, Msg3 will not be retransmitted.

[0254] The following examples illustrate the specific implementation process of the random access method described in the embodiments of this application.

[0255] Example 1

[0256] In this embodiment, during the resource selection process for random access, after determining that the SSB measurement result meets the Msg3 retransmission requirement based on a first threshold, the SSB with enhanced coverage is supported, and Msg3 retransmission is executed. Optionally, in this embodiment, the network-side device sends first configuration information, which, through first indication information, indicates support for the SSB with enhanced coverage.

[0257] See Figure 5 As shown, the specific implementation process of this embodiment includes the following steps:

[0258] S510, network-side devices configure random access parameters via RRC;

[0259] Optionally, the network-side device may be configured with at least one of the following parameters:

[0260] The RSRP threshold parameter rsrp-ThresholdSSB-SUL is used to select SUL or NUL;

[0261] The RSRP threshold parameter msgA-RSRP-Threshold is used to select between 2-step RA and 4-step RA.

[0262] The RSRP threshold parameter rsrp-ThresholdSSB used for 4-step RA selection of SSB is also known as the second threshold.

[0263] The ra-PreambleIndex parameter identifies the random access preamble index of the selected Preamble;

[0264] The first indication information is used to indicate the SSB that supports coverage enhancement;

[0265] A first threshold; the first threshold is a threshold for a first measurement parameter used to determine whether the SSB performs Msg3 retransmission; optionally, the first threshold applies to all SSBs that support coverage enhancement.

[0266] S520, carrier selection;

[0267] If the carrier used for random access is explicitly indicated, then that carrier is selected to perform the random access procedure;

[0268] If no carrier is explicitly designated for random access, and the serving cell is configured to support SUL, then: if the RSRP of the downlink path loss of the SSB is less than the RSRP threshold parameter rsrp-ThresholdSSB-SUL used to select SUL or NUL, the SUL carrier is selected for the random access procedure; otherwise, the NUL carrier is selected for the random access procedure.

[0269] S530, RACH type selection;

[0270] Since the CovEnh scenario mainly focuses on the 4-step CBRA process, the random access type RA_TYPE is set to 4-stepRA.

[0271] S540, based on the SSB measurement result and the first threshold, determine whether the first measurement parameter of the SSB measurement result meets the first threshold, that is, whether it meets the Msg3 repeated transmission condition;

[0272] In this embodiment, the first threshold is the threshold of the reference signal received power (RSRP) of the downlink path loss. The RSRP value of the downlink path loss of the SSB measurement result is compared with the first threshold. If the RSRP value of the downlink path loss is greater than the first threshold, it is determined that the SSB measurement result does not meet the first threshold, that is, it does not meet the Msg3 retransmission condition, and step S550 is executed; if the RSRP value of the downlink path loss is less than or equal to the first threshold, it is determined that the SSB measurement result meets the first threshold, that is, it meets the Msg3 retransmission condition, and step S560 is executed.

[0273] S550 selects SSB and Preamble, and performs the usual 4-step CBRA procedure, that is, does not perform Msg3 repeated transmission;

[0274] S560 selects an SSB that supports coverage enhancement based on preset conditions met by the SSB measurement results;

[0275] In this embodiment, the preset condition is that the second measurement parameter of each SSB is less than or equal to the second threshold. For example, the preset condition is that the SS-RSRP of each SSB is less than or equal to rsrp-ThresholdSSB. When the preset condition is met, an SSB is randomly selected from the measured SSBs as the selected SSB.

[0276] S570, determine whether the selected SSB is the SSB that supports coverage enhancement as indicated by the first indication information. If the selected SSB is an SSB that supports coverage enhancement, then execute S580; if the selected SSB is not an SSB that supports coverage enhancement, then execute S550, that is, execute the normal 4-step CBRA process.

[0277] S580, Preamble option;

[0278] In this step, if the selected SSB is the SSB that supports coverage enhancement as indicated by the first indication information, a Preamble for random access is selected from the first Preamble set;

[0279] S590, execute Msg3 to repeat the 4-step CBRA process.

[0280] Example 2

[0281] In this embodiment, during the resource selection process for random access, after determining that the SSB measurement result meets the Msg3 retransmission requirement based on a first threshold, the SSB with enhanced coverage is supported, and Msg3 retransmission is executed. Optionally, in this embodiment, the network-side device sends first configuration information, which, through first indication information, indicates support for the SSB with enhanced coverage.

[0282] In addition, similar to Embodiment 1, the preset condition for selecting an SSB that supports coverage enhancement is that the measured SS-RSRP of each SSB is less than or equal to rsrp-ThresholdSSB. However, in Embodiment 2, unlike Embodiment 1, when determining the selected SSB, one of the SSBs supporting coverage enhancement indicated by the first configuration information is selected as the selected SSB. The specific implementation process is as follows: Figure 6 As shown, it includes the following steps:

[0283] S610, network-side devices configure random access parameters via RRC;

[0284] Optionally, the network-side device may be configured with at least one of the following parameters:

[0285] The RSRP threshold parameter rsrp-ThresholdSSB-SUL is used to select SUL or NUL;

[0286] The RSRP threshold parameter msgA-RSRP-Threshold is used to select between 2-step RA and 4-step RA.

[0287] The RSRP threshold parameter rsrp-ThresholdSSB used for 4-step RA selection of SSB is also known as the second threshold.

[0288] The ra-PreambleIndex parameter identifies the random access preamble index of the selected Preamble;

[0289] The first indication information is used to indicate that the information supports the coverage enhancement SSB;

[0290] A first threshold; the first threshold is a threshold for a first measurement parameter used to determine whether to perform Msg3 retransmission; optionally, the first threshold applies to all SSBs that support coverage enhancement.

[0291] S620, Carrier Selection;

[0292] If the carrier used for random access is explicitly indicated, then that carrier is selected to perform the random access procedure;

[0293] If no carrier is explicitly designated for random access, and the serving cell is configured to support SUL, then: if the downlink path loss RSRP is less than the RSRP threshold parameter rsrp-ThresholdSSB-SUL used to select SUL or NUL, the SUL carrier is selected for the random access procedure; otherwise, the NUL carrier is selected for the random access procedure.

[0294] S630, RACH type selection;

[0295] Since the CovEnh scenario mainly focuses on the 4-step CBRA process, the random access type RA_TYPE is set to 4-stepRA.

[0296] S640, based on the SSB measurement result and the first threshold, determine whether the first measurement parameter of the SSB measurement result meets the first threshold, that is, whether it meets the Msg3 repeated transmission condition;

[0297] In this embodiment, the first threshold is the threshold of the reference signal received power (RSRP) of the downlink path loss. The RSRP value of the downlink path loss of the SSB measurement result is compared with the first threshold. If the RSRP value of the downlink path loss is greater than the first threshold, it is determined that the SSB measurement result does not meet the first threshold, that is, it does not meet the Msg3 retransmission condition, and step S650 is executed; if the RSRP value of the downlink path loss is less than or equal to the first threshold, it is determined that the SSB measurement result meets the first threshold, that is, it meets the Msg3 retransmission condition, and step S660 is executed.

[0298] S650 selects SSB and Preamble, and performs the usual 4-step CBRA procedure, that is, does not perform Msg3 repeated transmission;

[0299] S660 selects an SSB that supports coverage enhancement based on preset conditions met by the SSB measurement results;

[0300] In this embodiment, the preset condition includes that the second measurement parameter of each of the measured SSBs is less than or equal to the second threshold. For example, the preset condition includes that the SS-RSRP of each of the measured SSBs is less than or equal to rsrp-ThresholdSSB. When the preset condition is met, one of the SSBs that support coverage enhancement indicated by the first indication information is selected as the selected SSB.

[0301] S670, Preamble option;

[0302] In this step, if the selected SSB is the SSB that supports coverage enhancement as indicated by the first indication information, a Preamble for random access is selected from the first Preamble set;

[0303] S680, execute Msg3 to repeat the 4-step CBRA process.

[0304] Example 3

[0305] In this embodiment, during the resource selection process for random access, after determining that the SSB measurement result meets the Msg3 retransmission requirement based on a first threshold, the SSB with enhanced coverage is supported, and Msg3 retransmission is executed. Optionally, in this embodiment, the network-side device sends first configuration information, which, through first indication information, indicates support for the SSB with enhanced coverage.

[0306] In addition, unlike Embodiment 1 and Embodiment 2, the preset condition for supporting coverage enhancement SSB is that the SS-RSRP of at least one measured SSB is greater than rsrp-ThresholdSSB.

[0307] See Figure 7 As shown, the specific implementation process of this embodiment includes the following steps:

[0308] S710, network-side devices configure random access parameters via RRC;

[0309] Optionally, the network-side device may be configured with at least one of the following parameters:

[0310] The RSRP threshold parameter rsrp-ThresholdSSB-SUL is used to select SUL or NUL;

[0311] The RSRP threshold parameter msgA-RSRP-Threshold is used to select between 2-step RA and 4-step RA.

[0312] The RSRP threshold parameter rsrp-ThresholdSSB used for 4-step RA selection of SSB is also known as the second threshold.

[0313] The ra-PreambleIndex parameter identifies the random access preamble index of the selected Preamble;

[0314] The first indication information is used to indicate the SSB that supports coverage enhancement;

[0315] A first threshold; the first threshold is a threshold for a first measurement parameter used to determine whether to perform Msg3 retransmission; optionally, the first threshold applies to all SSBs that support coverage enhancement.

[0316] S720, Carrier Selection;

[0317] If the carrier used for random access is explicitly indicated, then that carrier is selected to perform the random access procedure;

[0318] If no carrier is explicitly designated for random access, and the serving cell is configured to support SUL, then: if the downlink path loss RSRP is less than the RSRP threshold parameter rsrp-ThresholdSSB-SUL used to select SUL or NUL, the SUL carrier is selected for the random access procedure; otherwise, the NUL carrier is selected for the random access procedure.

[0319] S730, RACH type selection;

[0320] Since the CovEnh scenario mainly focuses on the 4-step CBRA process, the random access type RA_TYPE is set to 4-stepRA.

[0321] S740, based on the SSB measurement result and the first threshold, determines whether the first measurement parameter of the SSB measurement result meets the first threshold, that is, whether it meets the Msg3 repeated transmission condition;

[0322] In this embodiment, the first threshold is the reference signal received power (RSRP) threshold for downlink path loss. The RSRP value of the downlink path loss measured by SSB is compared with the first threshold. If the RSRP value of the downlink path loss is greater than the first threshold, it is determined that the SSB measurement result does not meet the first threshold, that is, it does not meet the Msg3 retransmission condition, and step S750 is executed; if the RSRP value of the downlink path loss is less than or equal to the first threshold, it is determined that the SSB measurement result meets the first threshold, that is, it meets the Msg3 retransmission condition, and step S760 is executed.

[0323] S750 selects SSB and Preamble, and performs the usual 4-step CBRA procedure, that is, does not perform Msg3 repeated transmission;

[0324] S760 selects an SSB that supports coverage enhancement based on preset conditions met by the SSB measurement results;

[0325] In this embodiment, the preset condition that the SSB measurement result meets is that the SS-RSRP of at least one measured SSB is greater than rsrp-ThresholdSSB; if the preset condition is met, an SSB is randomly selected from the SSBs whose SS-RSRP is greater than rsrp-ThresholdSSB as the selected SSB.

[0326] S770, determine whether the selected SSB is the SSB that supports coverage enhancement as indicated by the first indication information. If the selected SSB is an SSB that supports coverage enhancement, then execute S780; if the selected SSB is not an SSB that supports coverage enhancement, then execute S750, that is, execute the normal 4-step CBRA process.

[0327] S780, Preamble option;

[0328] In this step, if the selected SSB is the SSB that supports coverage enhancement as indicated by the first indication information, a Preamble for random access is selected from the first Preamble set;

[0329] S790, execute Msg3 to repeat the 4-step CBRA process.

[0330] Example 4

[0331] In this embodiment, during the resource selection process for random access, after determining that the SSB measurement result meets the Msg3 retransmission requirement based on a first threshold, the SSB with enhanced coverage is supported, and Msg3 retransmission is executed. Optionally, in this embodiment, the network-side device sends first configuration information, which, through first indication information, indicates support for the SSB with enhanced coverage.

[0332] Furthermore, unlike Embodiments 1 and 2, the preset condition for selecting an SSB that supports coverage enhancement satisfies the condition that the SS-RSRP of at least one measured SSB is greater than the rsrp-ThresholdSSB. However, this embodiment differs from Embodiment 3 in that, when determining the selected SSB, the first SSB that supports coverage enhancement, indicated by the first indication information, is selected from the first SSBs whose second measurement parameter is greater than the second threshold, and Msg3 is repeatedly transmitted. The specific implementation process is as follows: Figure 8 As shown, it includes the following steps:

[0333] S810, network-side devices configure random access parameters via RRC;

[0334] Optionally, the network-side device may be configured with at least one of the following parameters:

[0335] The RSRP threshold rsrp-ThresholdSSB-SUL used to select SUL or NUL;

[0336] The RSRP threshold msgA-RSRP-Threshold used to select between 2-step RA and 4-step RA;

[0337] The RSRP threshold rsrp-ThresholdSSB used for 4-step RA selection of SSB is also known as the second threshold;

[0338] The ra-PreambleIndex parameter identifies the random access preamble index of the selected Preamble;

[0339] The first indication information is used to indicate the SSB that supports coverage enhancement;

[0340] A first threshold; this first threshold is a threshold used to determine whether to perform Msg3 retransmission; optionally, this first threshold applies to all SSBs that support coverage enhancement.

[0341] S820, Carrier Selection;

[0342] If the carrier used for random access is explicitly indicated, then that carrier is selected to perform the random access procedure;

[0343] If no carrier is explicitly designated for random access, and the serving cell is configured to support SUL, then: if the downlink path loss RSRP is less than the RSRP threshold parameter rsrp-ThresholdSSB-SUL used to select SUL or NUL, the SUL carrier is selected for the random access procedure; otherwise, the NUL carrier is selected for the random access procedure.

[0344] S830, RACH type selection;

[0345] Since the CovEnh scenario mainly focuses on the 4-step CBRA process, the random access type RA_TYPE is set to 4-stepRA.

[0346] S840, based on the SSB measurement result and the first threshold, determines whether the first measurement parameter of the SSB measurement result meets the first threshold, that is, whether it meets the Msg3 repeated transmission condition;

[0347] In this embodiment, the first threshold is the reference signal received power (RSRP) threshold for downlink path loss. The RSRP value of the downlink path loss measured by SSB is compared with the first threshold. If the RSRP value of the downlink path loss is greater than the first threshold, it is determined that the SSB measurement result does not meet the first threshold, that is, it does not meet the Msg3 retransmission condition, and step S850 is executed; if the RSRP value of the downlink path loss is less than or equal to the first threshold, it is determined that the SSB measurement result meets the first threshold, that is, it meets the Msg3 retransmission condition, and step S860 is executed.

[0348] S850 selects SSB and Preamble, and performs the usual 4-step CBRA procedure, that is, does not perform Msg3 repeated transmission;

[0349] S860 selects an SSB that supports coverage enhancement based on preset conditions met by the SSB measurement results;

[0350] In this embodiment, the preset condition that the SSB measurement result satisfies is that the SS-RSRP of at least one measured SSB is greater than rsrp-ThresholdSSB; when the preset condition is satisfied, among the SSBs whose measured SS-RSRP is greater than rsrp-ThresholdSSB, the SSB that supports coverage enhancement indicated by the first indication information is selected as the selected SSB.

[0351] S870, Preamble option;

[0352] In this step, if the selected SSB is the SSB that supports coverage enhancement as indicated by the first indication information, a Preamble for random access is selected from the first Preamble set;

[0353] S880, execute Msg3 to repeat the 4-step CBRA process.

[0354] Example 5

[0355] In this embodiment, unlike embodiments one through four, during the resource selection process for random access, after determining the selected SSB, the system judges whether the first measurement parameter of the SSB measurement result meets the Msg3 repeated transmission requirement based on a first threshold. Optionally, in this embodiment, the network-side device sends first configuration information, which, through first indication information, indicates an SSB that supports coverage enhancement.

[0356] See Figure 9 As shown, the specific implementation process of this embodiment includes the following steps:

[0357] S910, network-side devices configure random access parameters via RRC;

[0358] Optionally, the network-side device may be configured with at least one of the following parameters:

[0359] The RSRP threshold rsrp-ThresholdSSB-SUL used to select SUL or NUL;

[0360] The RSRP threshold msgA-RSRP-Threshold used to select between 2-step RA and 4-step RA;

[0361] The RSRP threshold rsrp-ThresholdSSB used for 4-step RA selection of SSB is also known as the second threshold;

[0362] The ra-PreambleIndex parameter identifies the random access preamble index of the selected Preamble;

[0363] The first indication information is used to indicate the SSB that supports coverage enhancement;

[0364] A first threshold; this first threshold is a threshold used to determine whether to perform Msg3 retransmission; optionally, this first threshold applies to all SSBs that support coverage enhancement.

[0365] S920, carrier selection;

[0366] If the carrier used for random access is explicitly indicated, then that carrier is selected to perform the random access procedure;

[0367] If no carrier is explicitly designated for random access, and the serving cell is configured to support SUL, then: if the downlink path loss RSRP is less than the RSRP threshold parameter rsrp-ThresholdSSB-SUL used to select SUL or NUL, the SUL carrier is selected for the random access procedure; otherwise, the NUL carrier is selected for the random access procedure.

[0368] S930, RACH type selection;

[0369] Since the CovEnh scenario mainly focuses on the 4-step CBRA process, the random access type RA_TYPE is set to 4-stepRA.

[0370] S940, select SSB;

[0371] In this embodiment, the preset condition is that the second measurement parameter of each SSB is less than or equal to the second threshold. For example, the preset condition is that the SS-RSRP of each SSB is less than or equal to the rsrp-ThresholdSSB. In this embodiment, when the SSB measurement result meets the preset condition, an SSB is randomly selected from the measured SSBs as the selected SSB.

[0372] S950, Preamble option;

[0373] Wherein, if the selected SSB is the SSB that supports coverage enhancement as indicated by the first indication information, a Preamble for random access is selected from the first Preamble set;

[0374] If the selected SSB is not the SSB that supports coverage enhancement as indicated by the first indication information, a Preamble for random access is selected from the second Preamble set.

[0375] The first Preamble set is a specific Preamble set used for coverage enhancement; the second Preamble set is a specific Preamble set used for traditional 4-step RA based on base station contention.

[0376] S960, determine whether the selected SSB is an SSB that supports coverage enhancement as indicated by the first indication information. If the selected SSB is not an SSB that supports coverage enhancement, execute S970. If the selected SSB is an SSB that supports coverage enhancement, execute S980.

[0377] S970 performs the usual 4-step CBRA procedure, that is, it does not perform Msg3 retransmission;

[0378] S980, based on the SSB measurement result and the first threshold, determines whether the first measurement parameter of the SSB measurement result meets the first threshold, that is, whether it meets the Msg3 repeated transmission condition;

[0379] In this embodiment, the first threshold is the reference signal received power (RSRP) threshold for downlink path loss. The RSRP value of the downlink path loss measured by SSB is compared with the first threshold. If the RSRP value of the downlink path loss is greater than the first threshold, it is determined that the SSB measurement result does not meet the first threshold, that is, it does not meet the Msg3 retransmission condition, and step S970 is executed; if the RSRP value of the downlink path loss is less than or equal to the first threshold, it is determined that the SSB measurement result meets the first threshold, that is, it meets the Msg3 retransmission condition, and step S990 is executed.

[0380] S990, execute Msg3 to repeat the 4-step CBRA process.

[0381] In another embodiment, during the resource selection process for random access, after determining the selected SSB, the system judges whether the SSB measurement results meet the condition that, when Msg3 is repeatedly transmitted, the SS-RSRP of each measured SSB is less than or equal to rsrp-ThresholdSSB. When selecting an SSB, the system considers the following: Figure 9 Unlike Embodiment 5, when selecting an SSB, one of the SSBs supporting coverage enhancement indicated by the first indication information is selected as the selected SSB. Then, a Preamble selection is performed, comparing the downlink path loss RSRP value of the SSB measurement result with a first threshold. If the downlink path loss RSRP value is greater than the first threshold, it is determined that the SSB measurement result does not meet the first threshold, i.e., it does not meet the Msg3 retransmission condition, and the normal 4-step CBRA process is executed. If the downlink path loss RSRP value is less than or equal to the first threshold, it is determined that the SSB measurement result meets the first threshold, i.e., it meets the Msg3 retransmission condition, and the Msg3 retransmission 4-step CBRA process is executed. The specific implementation process of this embodiment will not be described in detail here.

[0382] Example 6

[0383] In this embodiment, during the resource selection process for random access, after determining the selected SSB, it is judged whether the SSB measurement result meets the Msg3 repeated transmission requirement based on a first threshold. Optionally, in this embodiment, the network-side device sends first configuration information, which indicates the SSB supporting coverage enhancement through first indication information. In this embodiment, unlike embodiment five, the preset condition for selecting the SSB supporting coverage enhancement satisfies that the SS-RSRP of at least one measured SSB is greater than rsrp-ThresholdSSB.

[0384] See Figure 10 As shown,

[0385] The specific implementation process of this embodiment includes the following steps:

[0386] S1010, network-side devices configure random access parameters via RRC;

[0387] Optionally, the network-side device may be configured with at least one of the following parameters:

[0388] The RSRP threshold rsrp-ThresholdSSB-SUL used to select SUL or NUL;

[0389] The RSRP threshold msgA-RSRP-Threshold used to select between 2-step RA and 4-step RA;

[0390] The RSRP threshold rsrp-ThresholdSSB used for 4-step RA selection of SSB is also known as the second threshold;

[0391] The ra-PreambleIndex parameter identifies the random access preamble index of the selected Preamble;

[0392] The first indication information is used to indicate the SSB that supports coverage enhancement;

[0393] A first threshold; the first threshold is a threshold for a first measurement parameter used to determine whether to perform Msg3 retransmission; optionally, the first threshold applies to all SSBs that support coverage enhancement.

[0394] S1020, Carrier Selection;

[0395] If the carrier used for random access is explicitly indicated, then that carrier is selected to perform the random access procedure;

[0396] If no carrier is explicitly designated for random access, and the serving cell is configured to support SUL, then: if the downlink path loss RSRP is less than the RSRP threshold parameter rsrp-ThresholdSSB-SUL used to select SUL or NUL, the SUL carrier is selected for the random access procedure; otherwise, the NUL carrier is selected for the random access procedure.

[0397] S1030, RACH type selection;

[0398] Since the CovEnh scenario mainly focuses on the 4-step CBRA process, the random access type RA_TYPE is set to 4-stepRA.

[0399] S1040, select SSB;

[0400] In this embodiment, the preset condition for selecting an SSB that supports coverage enhancement is that the SS-RSRP of at least one measured SSB is greater than rsrp-ThresholdSSB; in this embodiment, when the SSB measurement result meets the preset condition, an SSB is randomly selected from the SSBs whose SS-RSRP is greater than rsrp-ThresholdSSB as the selected SSB.

[0401] S1050, Preamble option;

[0402] Wherein, if the selected SSB is the SSB that supports coverage enhancement as indicated by the first indication information, a Preamble for random access is selected from the first Preamble set;

[0403] If the selected SSB is not the SSB that supports coverage enhancement as indicated by the first indication information, a Preamble for random access is selected from the second Preamble set.

[0404] The first Preamble set is a specific Preamble set used for coverage enhancement; the second Preamble set is a specific Preamble set used for traditional 4-step RA based on base station contention.

[0405] S1060, determine whether the selected SSB is an SSB that supports coverage enhancement as indicated by the first indication information. If the selected SSB is not an SSB that supports coverage enhancement, execute S1070. If the selected SSB is an SSB that supports coverage enhancement, execute S1080.

[0406] S1070, performs the normal 4-step CBRA procedure, that is, does not perform Msg3 retransmission;

[0407] S1080, based on the SSB measurement result and the first threshold, determine whether the first measurement parameter of the SSB measurement result meets the first threshold, that is, whether it meets the Msg3 repeated transmission condition.

[0408] In this embodiment, the first threshold is the reference signal received power (RSRP) threshold for downlink path loss. The RSRP value of the downlink path loss measured by SSB is compared with the first threshold. If the RSRP value of the downlink path loss is greater than the first threshold, it is determined that the SSB measurement result does not meet the first threshold, that is, it does not meet the Msg3 retransmission condition, and step S1070 is executed; if the RSRP value of the downlink path loss is less than or equal to the first threshold, it is determined that the SSB measurement result meets the first threshold, that is, it meets the Msg3 retransmission condition, and step S1090 is executed.

[0409] S1090, execute Msg3 to repeat the 4-step CBRA process.

[0410] In another embodiment, during the resource selection process for random access, after determining the selected SSB, the system judges whether the SSB measurement results meet the condition that, when Msg3 is repeatedly transmitted, the SS-RSRP of at least one measured SSB is greater than rsrp-ThresholdSSB. When selecting the SSB, the system considers... Figure 9 Unlike Embodiment 5, when selecting an SSB, from among the SSBs whose SS-RSRP is greater than rsrp-ThresholdSSB, the SSB that supports coverage enhancement, as indicated by the first indication information, is selected as the selected SSB. Then, a Preamble selection is performed, comparing the downlink path loss RSRP value of the SSB measurement results with a first threshold. If the downlink path loss RSRP value is greater than the first threshold, it is determined that the SSB measurement result does not meet the first threshold, i.e., it does not meet the Msg3 retransmission condition, and the usual 4-step CBRA process is executed. If the downlink path loss RSRP value is less than or equal to the first threshold, it is determined that the SSB measurement result meets the first threshold, i.e., it meets the Msg3 retransmission condition, and the Msg3 retransmission 4-step CBRA process is executed. The specific implementation process of this embodiment will not be described in detail here.

[0411] In the above embodiments one to six of this application, taking the first configuration information including the first indication information as an example, the method of using the first configuration information to indicate whether the SSB supports coverage enhancement has been described in detail. It should be noted that the method of indicating whether the SSB supports coverage enhancement is not limited to indicating through the first indication information. For example, it can also be indicated by at least one of the following: second indication information for indicating whether the SSB does not support coverage enhancement, third indication information for indicating whether the SSB supports coverage enhancement, a first threshold corresponding to the SSB configuration that supports coverage enhancement, a specific transmission resource corresponding to the SSB configuration that supports coverage enhancement, and a second threshold corresponding to the SSB configuration that supports coverage enhancement. Each indication method will not be described in detail here.

[0412] The random access method described in this application sends first configuration information to the terminal through the network-side device to indicate whether the SSB supports coverage enhancement. The terminal selects some SSBs to perform the Msg3 repeated random access process to avoid resource waste.

[0413] On the other hand, by adopting the random access method described in the embodiments of this application, under the condition that the SS-RSRP of an SSB is greater than rsrp-ThresholdSSB, the process of whether to perform the Msg3 repeated random access procedure is improved.

[0414] Another aspect of this application embodiment provides a random access method, executed by a network-side device, such as... Figure 11 As shown, the method includes:

[0415] S1110, send first configuration information to the terminal, the first configuration information being used to indicate whether the synchronization signal block SSB supports coverage enhancement.

[0416] The random access method described in this application involves sending first configuration information to the terminal through the network-side device to indicate whether the SSB supports coverage enhancement. The terminal selects some SSBs to perform the Msg3 repeated random access process, thus avoiding resource waste.

[0417] Optionally, in the random access method, the first configuration information includes one or more of the following:

[0418] The first indication information is used to indicate the SSB that supports coverage enhancement;

[0419] The second indication information is used to indicate SSBs that do not support coverage enhancement;

[0420] The third indication information is used to indicate whether the synchronization signal block SSB supports coverage enhancement; the first threshold corresponding to the SSB configuration that supports coverage enhancement; the first threshold is a threshold for determining whether the SSB performs Msg3 retransmission of the first measurement parameter;

[0421] Specific transport resources that support SSB configurations with enhanced coverage;

[0422] A second threshold corresponding to the SSB configuration that supports coverage enhancement; the second threshold is a threshold for a second measurement parameter used for SSB selection.

[0423] Optionally, the random access method further includes:

[0424] Send one or more first thresholds to the terminal, wherein the first threshold is a threshold for determining whether the SSB performs Msg3 retransmission of a first measurement parameter.

[0425] Optionally, in the random access method, when a first threshold is sent to the terminal, all SSBs supporting coverage enhancement indicated by the first configuration information correspond to the first threshold;

[0426] When multiple first thresholds are sent to the terminal, if the SSB meets the first condition, the SSB that supports coverage enhancement indicated by the first configuration information corresponds to one of the multiple first thresholds; or, if the SSB meets the second condition, the SSB that supports coverage enhancement indicated by the first configuration information corresponds to other first thresholds among the multiple first thresholds besides the one first threshold.

[0427] Optionally, in the random access method, the first condition is that the second measurement parameter of each SSB is less than or equal to the second threshold; or, the second condition is that at least one SSB has a second measurement parameter greater than the second threshold.

[0428] For details on the random access method described in this application, which is applied to a network-side device and sends first configuration information to a terminal, please refer to the detailed description of the method applied to the terminal embodiment, which will not be described again here.

[0429] This application also provides a terminal, such as... Figure 12 As shown, the terminal includes a memory 1210, a transceiver 1220, and a processor 1230.

[0430] The memory 1210 is used to store computer programs; the transceiver 1220 is used to send and receive data under the control of the processor 1230; the processor 1230 is used to read the computer program in the memory 1210 and perform the following operations:

[0431] Obtain first configuration information sent by the network-side device, wherein the first configuration information is used to indicate whether the Synchronization Signal Block (SSB) supports coverage enhancement;

[0432] Based on the first configuration information, select an SSB that supports coverage enhancement to perform repeated Msg3 transmission.

[0433] Optionally, in the terminal, the first configuration information includes one or more of the following:

[0434] The first indication information is used to indicate the SSB that supports coverage enhancement;

[0435] The second indication information is used to indicate SSBs that do not support coverage enhancement;

[0436] The third indication information is used to indicate whether the synchronization signal block SSB supports coverage enhancement; the first threshold corresponding to the SSB configuration that supports coverage enhancement; the first threshold is a threshold for determining whether the SSB performs Msg3 retransmission of the first measurement parameter;

[0437] Specific transport resources that support SSB configurations with enhanced coverage;

[0438] A second threshold corresponding to the SSB configuration that supports coverage enhancement; the second threshold is a threshold for a second measurement parameter used for SSB selection.

[0439] Optionally, in the terminal, the processor 1230 is further configured to:

[0440] Obtain one or more first thresholds sent by the network-side device, wherein the first threshold is a threshold for a first measurement parameter used to determine whether the SSB performs Msg3 retransmission.

[0441] Optionally, in the terminal, the processor 1230 selects an SSB that supports coverage enhancement to perform repeated Msg3 transmission according to the first configuration information, including:

[0442] Based on the measurement results of the SSB and the first threshold, determine whether the first measurement parameter in the measurement results of the SSB meets the first threshold;

[0443] If the first measurement parameter of the SSB meets the first threshold, and the second measurement parameter in the measurement result of the SSB meets the preset condition, the SSB that supports coverage enhancement is selected, and Msg3 is repeatedly transmitted.

[0444] Optionally, the terminal, wherein,

[0445] When the processor obtains a first threshold sent by the network-side device, all SSBs that support coverage enhancement indicated by the first configuration information correspond to the first threshold.

[0446] When the processor acquires multiple first thresholds sent by the network-side device, if the SSB meets the first condition, the SSB that supports coverage enhancement indicated by the first configuration information corresponds to one of the multiple first thresholds; or, if the SSB meets the second condition, the SSB that supports coverage enhancement indicated by the first configuration information corresponds to other first thresholds among the multiple first thresholds besides the one first threshold.

[0447] Optionally, in the terminal, the first condition is that the second measurement parameter of each SSB is less than or equal to the second threshold; or, the second condition is that at least one SSB has a second measurement parameter greater than the second threshold.

[0448] Optionally, in the terminal, the preset conditions include one of the following:

[0449] The second measurement parameter of each SSB is less than or equal to the second threshold;

[0450] There exists at least one second measurement parameter of the SSB that is greater than the second threshold.

[0451] Optionally, in the terminal, where the processor selects an SSB that supports coverage enhancement to perform Msg3 retransmission when the second measurement parameter of each SSB is less than or equal to a second threshold, the process includes:

[0452] Among the SSBs that support coverage enhancement indicated in the first configuration information, select one of the SSBs and perform Msg3 retransmission; or

[0453] Select any one of the SSBs as the selected SSB;

[0454] Determine whether the selected SSB is the SSB that supports coverage enhancement as indicated by the first configuration information;

[0455] When the selected SSB is an SSB that supports coverage enhancement, Msg3 retransmission is performed using the selected SSB.

[0456] Optionally, in the terminal, if the processor 1230 selects an SSB that supports coverage enhancement to perform Msg3 retransmission when at least one SSB's second measurement parameter is greater than the second threshold, the process includes:

[0457] From the SSBs whose second measurement parameter is greater than the second threshold, select the SSB that supports coverage enhancement as indicated by the first configuration information, and perform Msg3 retransmission; or

[0458] From the SSBs whose second measurement parameter is greater than the second threshold, arbitrarily select one SSB as the selected SSB;

[0459] Determine whether the selected SSB is the SSB that supports coverage enhancement as indicated by the first configuration information;

[0460] When the selected SSB is an SSB that supports coverage enhancement, Msg3 retransmission is performed using the selected SSB.

[0461] Optionally, in the terminal, the processor 1230 is further configured to:

[0462] When the selected SSB is not the SSB that supports coverage enhancement as indicated by the first configuration information, Msg3 retransmission is not performed.

[0463] Optionally, in the terminal, the processor 1230 is further configured to:

[0464] If the SSB measurement result does not meet the first threshold, Msg3 will not be retransmitted.

[0465] Among them, Figure 12 In this context, the bus architecture can include any number of interconnected buses and bridges, specifically linking various circuits of one or more processors represented by processor 1230 and memory represented by memory 1210 together. The bus architecture can also link various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. The bus interface provides an interface. The transceiver 1220 can be multiple elements, including transmitters and receivers, providing a unit for communicating with various other devices over a transmission medium, including wireless channels, wired channels, optical fibers, etc. For different user equipment, the user interface 1240 can also be an interface capable of connecting external or internal devices, including but not limited to keypads, displays, speakers, microphones, joysticks, etc.

[0466] The processor 1230 is responsible for managing the bus architecture and general processing, and the memory 1210 can store the data used by the processor 1230 when performing operations.

[0467] Optionally, the processor 1230 can be a CPU (Central Processing Unit), ASIC (Application Specific Integrated Circuit), FPGA (Field-Programmable Gate Array), or CPLD (Complex Programmable Logic Device), and the processor can also adopt a multi-core architecture.

[0468] This application also provides a network-side device, such as... Figure 13 As shown, the terminal includes a memory 1310, a transceiver 1320, and a processor 1330.

[0469] Memory 1310 is used to store computer programs; transceiver 1320 is used to send and receive data under the control of the processor; processor 1330 is used to read the computer program in memory 1310 and perform the following operations:

[0470] Send first configuration information to the terminal, the first configuration information being used to indicate whether the synchronization signal block (SSB) supports coverage enhancement.

[0471] Optionally, in the network-side device, the first configuration information includes one or more of the following:

[0472] The first indication information is used to indicate the SSB that supports coverage enhancement;

[0473] The second indication information is used to indicate SSBs that do not support coverage enhancement;

[0474] The third indication information is used to indicate whether the synchronization signal block SSB supports coverage enhancement; the first threshold corresponding to the SSB configuration that supports coverage enhancement; the first threshold is a threshold for determining whether the SSB performs Msg3 retransmission of the first measurement parameter;

[0475] Specific transport resources that support SSB configurations with enhanced coverage;

[0476] A second threshold corresponding to the SSB configuration that supports coverage enhancement; the second threshold is a threshold for a second measurement parameter used for SSB selection.

[0477] Optionally, in the network-side device, the processor 1330 is further configured to:

[0478] Send one or more first thresholds to the terminal, wherein the first threshold is a threshold for determining whether the SSB performs Msg3 retransmission of a first measurement parameter.

[0479] Optionally, in the network-side device, when the processor 1330 sends a first threshold to the terminal, all SSBs supporting coverage enhancement indicated by the first configuration information correspond to the first threshold.

[0480] When the processor sends multiple first thresholds to the terminal, if the SSB meets a first condition, the SSB supporting coverage enhancement indicated by the first configuration information corresponds to one of the multiple first thresholds; or, if the SSB meets a second condition, the SSB supporting coverage enhancement indicated by the first configuration information corresponds to other first thresholds among the multiple first thresholds besides the one mentioned above. Optionally, in the network-side device, the first condition is that the second measurement parameter of each SSB is less than or equal to the second threshold; or, the second condition is that at least one SSB has a second measurement parameter greater than the second threshold.

[0481] Among them, Figure 13In this context, the bus architecture can include any number of interconnected buses and bridges, specifically linking various circuits together, represented by one or more processors (processor 1330) and memory (memory 1310). The bus architecture can also link various other circuits, such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. The bus interface provides an interface. The transceiver 1320 can be multiple elements, including transmitters and receivers, providing a unit for communicating with various other devices over transmission media, including wireless channels, wired channels, optical fibers, etc. The processor 1330 is responsible for managing the bus architecture and general processing, and the memory 1310 can store data used by the processor 1330 during operation.

[0482] The processor 1330 can 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). The processor can also adopt a multi-core architecture.

[0483] This application also provides a random access device, executed by a terminal, such as... Figure 14 As shown, the device includes:

[0484] Information acquisition module 1410 is used to acquire first configuration information sent by network-side device, the first configuration information being used to indicate whether the synchronization signal block SSB supports coverage enhancement;

[0485] The processing module 1420 is configured to select an SSB that supports coverage enhancement to perform repeated Msg3 transmission based on the first configuration information.

[0486] Optionally, in the random access device, the first configuration information includes one or more of the following:

[0487] The first indication information is used to indicate the SSB that supports coverage enhancement;

[0488] The second indication information is used to indicate SSBs that do not support coverage enhancement;

[0489] The third indication information is used to indicate whether the synchronization signal block SSB supports coverage enhancement; the first threshold corresponding to the SSB configuration that supports coverage enhancement; the first threshold is a threshold for determining whether the SSB performs Msg3 retransmission of the first measurement parameter;

[0490] Specific transport resources that support SSB configurations with enhanced coverage;

[0491] A second threshold corresponding to the SSB configuration that supports coverage enhancement; the second threshold is a threshold for a second measurement parameter used for SSB selection.

[0492] Optionally, in the random access device, the information acquisition module 1410 is further configured to:

[0493] Obtain one or more first thresholds sent by the network-side device, wherein the first threshold is a threshold for a first measurement parameter used to determine whether the SSB performs Msg3 retransmission.

[0494] Optionally, in the random access device, the processing module 1420 selects an SSB that supports coverage enhancement to perform repeated Msg3 transmission based on the first configuration information, including:

[0495] Based on the measurement results of the SSB and the first threshold, determine whether the first measurement parameter in the measurement results of the SSB meets the first threshold;

[0496] If the first measurement parameter of the SSB meets the first threshold, and the second measurement parameter in the measurement result of the SSB meets the preset condition, the SSB that supports coverage enhancement is selected, and Msg3 is repeatedly transmitted.

[0497] Optionally, in the random access device, when the information acquisition module 1410 acquires a first threshold sent by the network-side device, all SSBs supporting coverage enhancement indicated by the first configuration information correspond to the first threshold.

[0498] When multiple first thresholds are obtained from the network-side device, if the SSB meets the first condition, the SSB that supports coverage enhancement indicated by the first configuration information corresponds to one of the multiple first thresholds; or, if the SSB meets the second condition, the SSB that supports coverage enhancement indicated by the first configuration information corresponds to other first thresholds among the multiple first thresholds besides the one mentioned above.

[0499] Optionally, in the random access device, the first condition is that the second measurement parameter of each SSB is less than or equal to the second threshold; or, the second condition is that at least one SSB has a second measurement parameter greater than the second threshold.

[0500] Optionally, in the random access device, the preset conditions include one of the following:

[0501] The second measurement parameter of each SSB is less than or equal to the second threshold;

[0502] There exists at least one second measurement parameter of the SSB that is greater than the second threshold.

[0503] Optionally, in the random access device, when the second measurement parameter of each SSB is less than or equal to the second threshold, the processing module 1420 selects the SSB that supports coverage enhancement to perform Msg3 retransmission, including:

[0504] Among the SSBs that support coverage enhancement indicated in the first configuration information, select one of the SSBs and perform Msg3 retransmission; or

[0505] Select any one of the SSBs as the selected SSB;

[0506] Determine whether the selected SSB is the SSB that supports coverage enhancement as indicated by the first configuration information;

[0507] When the selected SSB is an SSB that supports coverage enhancement, Msg3 retransmission is performed using the selected SSB.

[0508] Optionally, in the random access device, if the second measurement parameter of at least one SSB is greater than the second threshold, the processing module 1420 selects the SSB that supports coverage enhancement to perform Msg3 retransmission, including:

[0509] From the SSBs whose second measurement parameter is greater than the second threshold, select the SSB that supports coverage enhancement as indicated by the first configuration information, and perform Msg3 retransmission; or

[0510] From the SSBs whose second measurement parameter is greater than the second threshold, arbitrarily select one SSB as the selected SSB;

[0511] Determine whether the selected SSB is the SSB that supports coverage enhancement as indicated by the first configuration information;

[0512] When the selected SSB is an SSB that supports coverage enhancement, Msg3 retransmission is performed using the selected SSB.

[0513] Optionally, in the random access device, the processing module 1420 is further configured to:

[0514] When the selected SSB is not the SSB that supports coverage enhancement as indicated by the first configuration information, Msg3 retransmission is not performed.

[0515] Optionally, in the random access device, the processing module 1420 is further configured to:

[0516] If the SSB measurement result does not meet the first threshold, Msg3 retransmission will not be performed.

[0517] This application also provides a random access device, executed by a network-side device, such as... Figure 15 As shown, the device includes:

[0518] The information sending module 1510 is used to send first configuration information to the terminal, the first configuration information being used to indicate whether the synchronization signal block SSB supports coverage enhancement.

[0519] Optionally, in the random access device, the first configuration information includes one or more of the following:

[0520] The first indication information is used to indicate the SSB that supports coverage enhancement;

[0521] The second indication information is used to indicate SSBs that do not support coverage enhancement;

[0522] The third indication information is used to indicate whether the synchronization signal block SSB supports coverage enhancement; the first threshold corresponding to the SSB configuration that supports coverage enhancement; the first threshold is a threshold for determining whether the SSB performs Msg3 retransmission of the first measurement parameter;

[0523] Specific transport resources that support SSB configurations with enhanced coverage;

[0524] A second threshold corresponding to the SSB configuration that supports coverage enhancement; the second threshold is a threshold for a second measurement parameter used for SSB selection.

[0525] Optionally, in the random access device, the information sending module 1510 is further configured to:

[0526] Send one or more first thresholds to the terminal, the first thresholds being thresholds for determining whether to perform repeated transmission of the first measurement parameter of Msg3.

[0527] Optionally, in the random access device, when the number of the first threshold is one, all SSBs supporting coverage enhancement indicated by the first configuration information correspond to the first threshold;

[0528] When there are multiple first thresholds, when the SSB meets the first condition, the SSB that supports coverage enhancement indicated by the first configuration information corresponds to one of the multiple first thresholds; or, when the SSB meets the second condition, the SSB that supports coverage enhancement indicated by the first configuration information corresponds to other first thresholds among the multiple first thresholds besides the one first threshold.

[0529] Optionally, in the random access device, the first condition is that the measured parameters of each SSB are less than or equal to the second threshold; or, the second condition is that at least one SSB has a measured parameter greater than the second threshold.

[0530] It should be noted that the random access method and random access device described in the embodiments of this application are based on the same application concept. Since the methods and devices solve problems in similar principles, the implementation of the devices and methods can refer to each other, and the repeated parts will not be described again.

[0531] It should be noted that the apparatus provided in this application embodiment can implement all the method steps implemented in the above method embodiment and can achieve the same technical effect. Here, the parts that are the same as those in the method embodiment and the beneficial effects will not be described in detail.

[0532] This application also provides a processor-readable storage medium storing a computer program for causing the processor to execute the random access method as described in any of the preceding claims.

[0533] The processor-readable storage medium can be any available medium or data storage device that the processor can access, including but not limited to magnetic memory (e.g., floppy disk, hard disk, magnetic tape, magneto-optical disk (MO)), optical memory (e.g., CD, DVD, BD, HVD), and semiconductor memory (e.g., ROM, EPROM, EEPROM, non-volatile memory (NAND FLASH), solid-state drive (SSD)).

[0534] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product implemented on one or more computer-usable storage media (including, but not limited to, disk storage and optical storage) containing computer-usable program code.

[0535] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer-executable instructions. These computer-executable instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0536] 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 particular manner, such that the instructions stored in the processor-readable memory produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0537] These processors can execute instructions that can also be loaded onto a computer or other programmable data processing device, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable device for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0538] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A random access method, characterized by, The method includes: Obtain first configuration information sent by the network-side device, wherein the first configuration information is used to indicate whether the Synchronization Signal Block (SSB) supports coverage enhancement; Based on the first configuration information, select an SSB that supports coverage enhancement to perform repeated Msg3 transmission.

2. The random access method of claim 1, wherein, The first configuration information includes one or more of the following: The first indication information is used to indicate the SSB that supports coverage enhancement; The second indication information is used to indicate SSBs that do not support coverage enhancement; The third indication information is used to indicate whether the Synchronization Signal Block (SSB) supports coverage enhancement. The first threshold corresponding to support SSB configurations with enhanced coverage; The first threshold is a threshold for a first measurement parameter used to determine whether the SSB performs repeated transmission of Msg3; Specific transport resources that support SSB configurations with enhanced coverage; The second threshold corresponds to support for SSB configurations with enhanced coverage; The second threshold is a threshold value for the second measurement parameter used for SSB selection.

3. The random access method of claim 1, wherein, The method further includes: Obtain one or more first thresholds sent by the network-side device, wherein the first threshold is a threshold for a first measurement parameter used to determine whether the SSB performs Msg3 retransmission.

4. The random access method of claim 3, wherein, The step of selecting an SSB that supports coverage enhancement to perform repeated Msg3 transmission based on the first configuration information includes: Based on the measurement results of the SSB and the first threshold, determine whether the first measurement parameter in the measurement results of the SSB meets the first threshold; If the first measurement parameter of the SSB meets the first threshold, and the second measurement parameter in the measurement result of the SSB meets the preset condition, the SSB that supports coverage enhancement is selected, and Msg3 is repeatedly transmitted.

5. The random access method of claim 3, wherein, When a first threshold is obtained from the network-side device, all SSBs that support coverage enhancement as indicated by the first configuration information correspond to the first threshold. When multiple first thresholds are obtained from the network-side device, if the SSB meets the first condition, the SSB that supports coverage enhancement indicated by the first configuration information corresponds to one of the multiple first thresholds. Alternatively, when the SSB meets the second condition, the SSB that supports coverage enhancement indicated by the first configuration information corresponds to other first thresholds among the plurality of first thresholds besides the one first threshold.

6. The random access method according to claim 5, characterized by, The first condition is that the second measurement parameter of each SSB is less than or equal to the second threshold; or, the second condition is that at least one SSB has a second measurement parameter greater than the second threshold.

7. The random access method according to claim 4, characterized in that, The preset conditions include one of the following: The second measurement parameter of each SSB is less than or equal to the second threshold; There exists at least one second measurement parameter of the SSB that is greater than the second threshold.

8. The random access method according to claim 7, characterized in that, When the second measurement parameter of each SSB is less than or equal to the second threshold, the selection of the SSB supporting coverage enhancement to perform Msg3 retransmission includes: Among the SSBs that support coverage enhancement indicated in the first configuration information, select one of the SSBs and perform Msg3 retransmission; or Choose any one of the SSBs as the selected SSB; Determine whether the selected SSB is the SSB that supports coverage enhancement as indicated by the first configuration information; If the selected SSB is an SSB that supports coverage enhancement, Msg3 retransmission is performed using the selected SSB.

9. The random access method according to claim 7, characterized in that, If at least one SSB's second measurement parameter is greater than the second threshold, the selection of the SSB supporting coverage enhancement to perform Msg3 retransmission includes: From the SSBs whose second measurement parameter is greater than the second threshold, select the SSB that supports coverage enhancement as indicated by the first configuration information, and perform Msg3 retransmission; or From the SSBs whose second measurement parameter is greater than the second threshold, arbitrarily select one SSB as the selected SSB; Determine whether the selected SSB is the SSB that supports coverage enhancement as indicated by the first configuration information; When the selected SSB is an SSB that supports coverage enhancement, Msg3 retransmission is performed using the selected SSB.

10. The random access method according to claim 8 or 9, characterized in that, The method further includes: If the selected SSB is not the SSB that supports coverage enhancement as indicated by the first configuration information, Msg3 retransmission will not be performed.

11. The random access method according to claim 4, characterized in that, The method further includes: If the measurement result of the SSB does not meet the first threshold, Msg3 will not be retransmitted.

12. A random access method, characterized in that, Performed by a network-side device, the method includes: Send first configuration information to the terminal. The first configuration information is used to indicate whether the synchronization signal block (SSB) supports coverage enhancement, and is used by the terminal to select the SSB that supports coverage enhancement to perform Msg3 retransmission.

13. The random access method according to claim 12, characterized in that, The first configuration information includes one or more of the following: The first indication information is used to indicate the SSB that supports coverage enhancement; The second indication information is used to indicate SSBs that do not support coverage enhancement; The third indication information is used to indicate whether the Synchronization Signal Block (SSB) supports coverage enhancement. The first threshold corresponding to support SSB configurations with enhanced coverage; The first threshold is a threshold for a first measurement parameter used to determine whether the SSB performs repeated transmission of Msg3; Specific transport resources that support SSB configurations with enhanced coverage; The second threshold corresponds to support for SSB configurations with enhanced coverage; The second threshold is a threshold value for the second measurement parameter used for SSB selection.

14. The random access method according to claim 12, characterized in that, The method further includes: Send one or more first thresholds to the terminal, wherein the first threshold is a threshold for determining whether the SSB performs Msg3 retransmission of a first measurement parameter.

15. The random access method according to claim 14, characterized in that, When a first threshold is sent to the terminal, all SSBs that support coverage enhancement as indicated by the first configuration information correspond to the first threshold. When multiple first thresholds are sent to the terminal, if the SSB meets the first condition, the SSB that supports coverage enhancement indicated by the first configuration information corresponds to one of the multiple first thresholds. Alternatively, when the SSB meets the second condition, the SSB that supports coverage enhancement indicated by the first configuration information corresponds to other first thresholds among the plurality of first thresholds besides the one first threshold.

16. The random access method according to claim 15, characterized in that, The first condition is that the second measurement parameter of each SSB is less than or equal to the second threshold; or, the second condition is that at least one SSB has a second measurement parameter greater than the second threshold.

17. A terminal, characterized in that, Includes memory, transceiver, and processor: A memory for storing computer programs; a transceiver for sending and receiving data under the control of the processor; and a processor for reading the computer programs from the memory and performing the following operations: Obtain first configuration information sent by the network-side device, wherein the first configuration information is used to indicate whether the Synchronization Signal Block (SSB) supports coverage enhancement; Based on the first configuration information, select an SSB that supports coverage enhancement to perform repeated Msg3 transmission.

18. The terminal according to claim 17, characterized in that, The first configuration information includes one or more of the following: The first indication information is used to indicate the SSB that supports coverage enhancement; The second indication information is used to indicate SSBs that do not support coverage enhancement; The third indication information is used to indicate whether the Synchronization Signal Block (SSB) supports coverage enhancement. The first threshold corresponding to support SSB configurations with enhanced coverage; The first threshold is a threshold for a first measurement parameter used to determine whether the SSB performs repeated transmission of Msg3; Specific transport resources that support SSB configurations with enhanced coverage; The second threshold corresponds to support for SSB configurations with enhanced coverage; The second threshold is a threshold value for the second measurement parameter used for SSB selection.

19. The terminal according to claim 17, characterized in that, The processor is also used for: Obtain one or more first thresholds sent by the network-side device, wherein the first threshold is a threshold for a first measurement parameter used to determine whether the SSB performs Msg3 retransmission.

20. The terminal according to claim 19, characterized in that, The processor, based on the first configuration information, selects an SSB that supports coverage enhancement to perform repeated Msg3 transmission, including: Based on the measurement results of the SSB and the first threshold, determine whether the first measurement parameter in the measurement results of the SSB meets the first threshold; If the first measurement parameter of the SSB meets the first threshold, and the second measurement parameter in the measurement result of the SSB meets the preset condition, the SSB that supports coverage enhancement is selected, and Msg3 is repeatedly transmitted.

21. The terminal according to claim 19, characterized in that, When the processor obtains a first threshold sent by the network-side device, all SSBs that support coverage enhancement indicated by the first configuration information correspond to the first threshold. When the processor obtains multiple first thresholds sent by the network-side device, when the SSB meets the first condition, the SSB that supports coverage enhancement indicated by the first configuration information corresponds to one of the multiple first thresholds. Alternatively, when the SSB meets the second condition, the SSB that supports coverage enhancement indicated by the first configuration information corresponds to other first thresholds among the plurality of first thresholds besides the one first threshold.

22. The terminal according to claim 21, characterized in that, The first condition is that the second measurement parameter of each SSB is less than or equal to the second threshold; or, the second condition is that at least one SSB has a second measurement parameter greater than the second threshold.

23. The terminal according to claim 20, characterized in that, The preset conditions include one of the following: The second measurement parameter of each SSB is less than or equal to the second threshold; There exists at least one second measurement parameter of the SSB that is greater than the second threshold.

24. The terminal according to claim 23, characterized in that, When the second measurement parameter of each SSB is less than or equal to the second threshold, the processor selects the SSB that supports coverage enhancement to perform Msg3 retransmission, including: Among the SSBs that support coverage enhancement indicated in the first configuration information, select one of the SSBs and perform Msg3 retransmission; or Choose any one of the SSBs as the selected SSB; Determine whether the selected SSB is the SSB that supports coverage enhancement as indicated by the first configuration information; If the selected SSB is an SSB that supports coverage enhancement, Msg3 retransmission is performed using the selected SSB.

25. The terminal according to claim 23, characterized in that, If at least one SSB's second measurement parameter is greater than the second threshold, the processor selects an SSB that supports coverage enhancement to perform Msg3 retransmission, including: From the SSBs whose second measurement parameter is greater than the second threshold, select the SSB that supports coverage enhancement as indicated by the first configuration information, and perform Msg3 retransmission; or From the SSBs whose second measurement parameter is greater than the second threshold, arbitrarily select one SSB as the selected SSB; Determine whether the selected SSB is the SSB that supports coverage enhancement as indicated by the first configuration information; When the selected SSB is an SSB that supports coverage enhancement, Msg3 retransmission is performed using the selected SSB.

26. The terminal according to claim 24 or 25, characterized in that, The processor is also used for: If the selected SSB is not the SSB that supports coverage enhancement as indicated by the first configuration information, Msg3 retransmission will not be performed.

27. The terminal according to claim 20, characterized in that, The processor is also used for: If the measurement result of the SSB does not meet the first threshold, Msg3 will not be retransmitted.

28. A network-side device, characterized in that, Includes memory, transceiver, and processor: A memory for storing computer programs; a transceiver for sending and receiving data under the control of the processor; and a processor for reading the computer programs from the memory and performing the following operations: Send first configuration information to the terminal. The first configuration information is used to indicate whether the synchronization signal block (SSB) supports coverage enhancement, and is used by the terminal to select the SSB that supports coverage enhancement to perform Msg3 retransmission.

29. The network-side device according to claim 28, characterized in that, The first configuration information includes one or more of the following: The first indication information is used to indicate the SSB that supports coverage enhancement; The second indication information is used to indicate SSBs that do not support coverage enhancement; The third indication information is used to indicate whether the Synchronization Signal Block (SSB) supports coverage enhancement. The first threshold corresponding to support SSB configurations with enhanced coverage; The first threshold is a threshold for a first measurement parameter used to determine whether the SSB performs repeated transmission of Msg3; Specific transport resources that support SSB configurations with enhanced coverage; The second threshold corresponds to support for SSB configurations with enhanced coverage; The second threshold is a threshold value for the second measurement parameter used for SSB selection.

30. The network-side device according to claim 28, characterized in that, The processor is also used for: Send one or more first thresholds to the terminal, wherein the first threshold is a threshold for determining whether the SSB performs Msg3 retransmission of a first measurement parameter.

31. The network-side device according to claim 30, characterized in that, When the processor sends a first threshold to the terminal, all SSBs that support coverage enhancement as indicated by the first configuration information correspond to the first threshold. When the processor sends multiple first thresholds to the terminal, and the SSB meets the first condition, the SSB that supports coverage enhancement indicated by the first configuration information corresponds to one of the multiple first thresholds. Alternatively, when the SSB meets the second condition, the SSB that supports coverage enhancement indicated by the first configuration information corresponds to other first thresholds among the plurality of first thresholds besides the one first threshold.

32. The network-side device according to claim 31, characterized in that, The first condition is that the second measurement parameter of each SSB is less than or equal to the second threshold; or, the second condition is that at least one SSB has a second measurement parameter greater than the second threshold.

33. A random access device, characterized in that, Applied to a terminal, the device includes: The information acquisition module is used to acquire first configuration information sent by the network-side device, wherein the first configuration information is used to indicate whether the synchronization signal block (SSB) supports coverage enhancement. The processing module is configured to select an SSB that supports coverage enhancement and perform repeated Msg3 transmission based on the first configuration information.

34. A random access device, characterized in that, Applied to network-side devices, the device includes: The information sending module is used to send first configuration information to the terminal. The first configuration information is used to indicate whether the synchronization signal block (SSB) supports coverage enhancement, and is used by the terminal to select the SSB that supports coverage enhancement to perform Msg3 repeated transmission.

35. A processor-readable storage medium, characterized in that, The processor-readable storage medium stores a computer program that causes the processor to perform the random access method according to any one of claims 1 to 11, or to perform the random access method according to any one of claims 12 to 16.

Images