WO2023004756A1

WO2023004756A1 - Random access method and apparatus, device and storage medium

Info

Publication number: WO2023004756A1
Application number: PCT/CN2021/109620
Authority: WO
Inventors: 胡奕; 李海涛
Original assignee: Oppo广东移动通信有限公司
Priority date: 2021-07-30
Filing date: 2021-07-30
Publication date: 2023-02-02
Also published as: CN117280836A

Abstract

The present application relates to the field of mobile communications, and provides a random access method and apparatus, a device and a storage medium. The method comprises: a first terminal determines a signal quality measurement result on a serving cell; and the first terminal determines, according to the signal quality measurement result and maximum transmitted power of the first terminal, whether to request for repeated transmission of a message 3 in a random access process from a network device. The first terminal can determine, according to the signal quality measurement result and the maximum transmitted power of the first terminal, whether to request for the repeated transmission of the message 3 in the random access process from the network device, so as to implement enhancement of uplink coverage of the mobile communication. In such process, the difference in the maximum transmitted power of the terminal can be considered, such that it is easier for the terminal having the lower maximum transmitted power to trigger the request for the repeated transmission of the Msg3, thereby implementing targeted enhancement of the upper coverage of the mobile communication.

Description

Random access method, device, equipment and storage medium

technical field

The present application relates to the field of mobile communication, in particular to a random access method, device, equipment and storage medium.

Background technique

Network coverage is one of the main network performances of a mobile communication network. Compared with Long Term Evolution (LTE), the working frequency band of 5th Generation Mobile Communication Technology (5G) is higher. The higher the operating frequency band, the greater the path loss experienced by the signal, resulting in reduced coverage.

Generally, the transmission power of the network equipment is much greater than that of the terminal, so the problem of limited uplink coverage in the network coverage is more serious. In order to solve the above problems, R17 (Release17) proposed coverage enhancement for Physical Uplink Shared Channel (PUSCH) and coverage enhancement for Physical Uplink Control Channel (PUCCH). For PUSCH, uplink coverage can be enhanced by using a repeated transmission mechanism.

Further discussion and research are needed on how the terminal device determines whether to request the network device for repeated PUSCH transmission of Message 3 (Msg3).

Contents of the invention

The present application provides a random access method, device, equipment and storage medium. The technical scheme is as follows.

According to an aspect of the present application, a random access method is provided, the method comprising:

The first terminal determines a signal quality measurement result on the serving cell;

The first terminal determines, according to the signal quality measurement result and the maximum transmit power of the first terminal, whether to request repeated transmission of message 3 in the random access process to the network device.

According to another aspect of the present application, a random access method is provided, the method comprising:

The network device receives the repeated transmission request of message 3 in the random access process sent by the first terminal;

Wherein, the repeated transmission request of the message 3 is determined by the first terminal according to the signal quality measurement result on the serving cell and the maximum transmit power of the first terminal.

According to another aspect of the present application, a random access device is provided, and the device includes:

A determining module, configured to determine a signal quality measurement result on the serving cell;

The determination module is further configured to determine whether to request repeated transmission of message 3 in the random access process to the network device according to the signal quality measurement result and the maximum transmit power of the first terminal.

The receiving module is configured to receive the repeated transmission request of message 3 in the random access process sent by the first terminal;

According to another aspect of the present application, a terminal is provided, and the terminal includes: a processor; a transceiver connected to the processor; a memory for storing executable instructions of the processor; wherein, the The processor is configured to load and execute the executable instructions to implement the random access method as described in the above aspect.

According to another aspect of the present application, a network device is provided, and the network device includes: a processor; a transceiver connected to the processor; a memory for storing executable instructions of the processor; wherein, The processor is configured to load and execute the executable instructions to implement the random access method as described in the above aspect.

According to another aspect of the present application, a computer-readable storage medium is provided, wherein executable instructions are stored in the readable storage medium, and the executable instructions are loaded and executed by the processor to implement the above-mentioned aspects. The random access method described above.

According to another aspect of the present application, a computer program product is provided, wherein executable instructions are stored in the readable storage medium, and the executable instructions are loaded and executed by the processor to implement the above aspects random access method.

According to another aspect of the present application, a chip is provided, the chip includes a programmable logic circuit and/or program instructions, and when the chip is run on a computer device, it is used to realize the random access described in the above aspect method.

The technical solution provided by the application at least includes the following beneficial effects:

The first terminal can determine whether to request repeated transmission of the message 3 in the random access process to the network device according to the signal quality measurement result and the maximum transmission power of the first terminal, so as to realize uplink coverage enhancement of mobile communication. In this process, the difference between the maximum transmission powers of the terminals can be considered, so that the terminal with the lower maximum transmission power can more easily trigger the repeated transmission of the request Msg3, so as to realize targeted enhancement of the uplink coverage of the mobile communication.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, other drawings can also be obtained based on these drawings without creative effort.

FIG. 1 is a schematic diagram of a random access process provided by an exemplary embodiment of the present application;

FIG. 2 is a schematic diagram of a system architecture of a communication system provided by an exemplary embodiment of the present application;

FIG. 3 is a flowchart of a random access method provided by an exemplary embodiment of the present application;

FIG. 4 is a flowchart of a random access method provided by an exemplary embodiment of the present application;

FIG. 5 is a flowchart of a random access method provided by an exemplary embodiment of the present application;

FIG. 6 is a schematic diagram of a process of determining whether to request repeated transmission of message 3 from a network device provided by an exemplary embodiment of the present application;

FIG. 7 is a flowchart of a random access method provided in an exemplary embodiment of the present application;

FIG. 8 is a schematic diagram of a process of determining whether to request repeated transmission of message 3 from a network device provided by an exemplary embodiment of the present application;

FIG. 9 is a flowchart of a random access method provided in an exemplary embodiment of the present application;

FIG. 10 is a schematic diagram of a process of determining whether to request repeated transmission of message 3 from a network device provided by an exemplary embodiment of the present application;

FIG. 11 is a flowchart of a random access method provided in an exemplary embodiment of the present application;

FIG. 12 is a schematic diagram of a connection relationship between a first terminal supporting sidelink communication and a second terminal provided by an exemplary embodiment of the present application;

Fig. 13 is a block diagram of a random access device provided by an exemplary embodiment of the present application;

Fig. 14 is a block diagram of a random access device provided by an exemplary embodiment of the present application;

Fig. 15 is a schematic structural diagram of a communication device provided by an exemplary embodiment of the present application.

Detailed ways

In order to make the purpose, technical solution and advantages of the present application clearer, the implementation manners of the present application will be further described in detail below in conjunction with the accompanying drawings.

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with aspects of the invention as recited in the appended claims.

The terminology used in the present disclosure is for the purpose of describing particular embodiments only, and is not intended to limit the present disclosure. As used in this disclosure and the appended claims, the singular forms "a", "the", and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise. It should also be understood that the term "and/or" as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

It should be understood that although the terms first, second, third, etc. may be used in the present disclosure to describe various information, the information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of the present disclosure, first information may also be called second information, and similarly, second information may also be called first information. Depending on the context, the word "if" as used herein may be interpreted as "at" or "when" or "in response to a determination."

Introduce the radio resource control state:

With the continuous improvement of the speed, delay, high-speed mobility, and energy efficiency of mobile communication networks, as well as the diversity and complexity of services in future life, the 3rd Generation Partnership Project (3GPP) international standards organization Started the research and development of 5G. The main application scenarios of 5G include: Enhanced Mobile Broadband (eMBB), Ultra Reliable Low Latency Communications (URLLC), and massive Machine Type of Communication (mMTC).

New air interface (New Radio, NR) can be deployed independently. In the 5G network environment, in order to achieve the purpose of reducing air interface signaling, quickly restoring wireless connections, and quickly restoring data services, a new Radio Resource Control (RRC) state is defined, specifically RRC_INACTIVE state, which is different from the RRC idle (RRC_IDLE) state and the RRC active (RRC_ACTIVE) state. Wherein, each RRC state can reflect a network connection state, and describes how the network device and the terminal handle terminal movement, paging message and system information broadcast.

RRC_IDLE: Mobility in the RRC_IDLE state refers to terminal-based cell selection reselection. Paging is initiated by the Core Network (CN) device, and the paging area is configured by the CN device. The base station does not have a terminal access stratum (Access Stratum, AS) context. There is no RRC connection.

RRC_CONNECTED: There is an RRC connection in the RRC_IDLE state, and the base station and the terminal have a terminal AS context. The location of the terminal determined by the network device is at the cell level. Mobility refers to mobility controlled by network devices. Unicast data can be transmitted between the terminal and the base station.

RRC_INACTIVE: Mobility in the RRC_IDLE state refers to cell selection and reselection based on the terminal, there is a connection between CN and NR, the terminal AS context exists on a base station, and paging is triggered by the radio access network (Random Access Network, RAN) , the RAN-based paging area is managed by the RAN, and the location of the terminal determined by the network device is based on the paging area level of the RAN.

Introduction to low power terminals:

In R17, NR introduces low-capability (Reduced Capability, RedCap) devices (low-power terminals). Currently, the application of RedCap devices mainly includes three scenarios:

Industrial Wireless Sensors (Industrial Wireless Sensors): Compared with URLLC, industrial wireless sensors have relatively low latency and reliability requirements. At the same time, the cost and power consumption of industrial wireless sensors are lower than those of URLLC and eMBB.

Video surveillance (Video surveillance): mainly used in video surveillance scenarios such as smart cities and industrial factories. For example, data collection and processing through video surveillance in smart cities can more effectively monitor and control urban resources and provide more effective services to urban residents.

Wearables: including smart watches, bracelets, electronic health equipment, and some medical monitoring equipment. One commonality among these devices is their small size.

For low-power terminals, energy saving is a very important technical indicator, especially for equipment such as industrial wireless sensors.

Introduce the random access process of NR:

During the random access process, the following events are mainly triggered:

Establish a wireless connection when the terminal initially accesses: the terminal switches from the RRC_IDLE state to the RRC_CONNECTED state.

· RRC connection re-establishment process: so that the terminal re-establishes the wireless connection after the wireless link fails.

·Cell switching: The terminal needs to establish uplink synchronization with a new cell.

· In the RRC_CONNECTED state, the downlink (DownLink, DL) data arrives, and the UL is in an out-of-sync state at this time.

·In the RRC_CONNECTED state, the uplink (UpLink, UL) data arrives, and at this time, the UL is in an out-of-sync state or there is no PUCCH resource for sending a scheduling request (Scheduling Request, SR).

· SR failed.

• Synchronous Reconfiguration Request from RRC.

The UE transitions from the RRC_INACTIVE state to the RRC_CONNECTED state

Establish time alignment during the secondary cell (Secondary Cell, SCell) addition process.

· Request other system information (System Information, SI).

· Beam failure recovery.

In NR, two random access methods are mainly supported, namely the contention-based random access method and the non-contention-based random access method. Fig. 1 is a schematic diagram of a random access process provided by an exemplary embodiment of the present application. As shown in Figure 1, the contention-based random access process is divided into 4 steps, and the non-contention-based random access process is divided into 2 steps. The detailed steps are as follows:

(1) The terminal device sends message 1 (Message 1, Msg1) to the network device.

The terminal device selects a physical random access channel (Physical Random Access Channel, PRACH) resource, and sends a selected preamble (preamble) on the selected PRACH. If it is random access based on non-contention, the PRACH resource and preamble can be specified by the network device. Based on the preamble, the network device can estimate the uplink Timing (timing) and the size of the scheduling (grant) required by the terminal to transmit the Msg3.

(2) The network device sends a random access response (Random Access Response, RAR) to the terminal device.

After the terminal device sends Msg1, it will open a random access response time window, and monitor the random access radio network temporary identifier (Random Access Radio Network Temporary Identifier, RA-RNTI) scrambled physical downlink within the random access response time window Control Channel (Physical Downlink Control Channel, PDCCH). The calculation formula of RA-RNTI is as follows:

RA-RNTI=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id;

Wherein, s_id is the index of the first Orthogonal Frequency Division Multiplexing (OFDM) symbol of the PRACH occasion (0≤s_id<14). t_id is the index of the first slot of the PRACH occasion in the system frame (0≤t_id<80). f_id is the index of the PRACH opportunity in the frequency domain (0≤f_id<8). ul_carrier_id is the UL carrier used for random access preamble transmission.

The RA-RNTI is related to the PRACH time-frequency resource used by the terminal equipment to send Msg1.

After the terminal device successfully receives the PDCCH scrambled by the RA-RNTI, the terminal device can obtain the Physical Downlink Shared Channel (PDSCH) scheduled by the PDCCH, which contains the RAR, and the RAR specifically includes the following information:

The header (subheader) of the RAR contains a backoff indicator (Backoff Indicator, BI), which is used to indicate the backoff time for retransmitting Msg1;

Random Access Preamble Identity Document (RAPID) in RAR: The network device responds to the received preamble index (preamble index);

The RAR payload (payload) contains a Timing Advance Group (TAG), which is used to adjust the uplink timing;

Uplink scheduling (Uplink grant, UL grant): used to schedule the uplink resource indication of Msg3;

Temporary Cell Radio Network Temporary Identifier (TC-RNTI): used to scramble the PDCCH (initial access) of Message 4 (Message 4, Msg4).

If the terminal device receives the PDCCH scrambled by the Random Access Response Radio Network Temporary Identifier (RAR-RNTI), and the RAR contains the preamble index sent by itself, the terminal device considers that the random access response has been successfully received. Access response.

For non-contention based random access, after the terminal device successfully receives Message 2 (Message 2, Msg2), the random access process ends. For contention-based random access, after the terminal device successfully receives Msg2, it needs to continue to transmit Msg3 and receive Msg4.

(3) The terminal device transmits Msg3 on the network device scheduling resource.

Msg3 is mainly used to notify the network device of what event triggers the random access channel (Random Access Channel, RACH) process. For example, if it is an initial access random process, Msg3 will carry the terminal identifier and establishment cause; if it is RRC reconstruction, it will carry the connection state terminal identifier and establishment cause.

(4) The network device sends Msg4 to the terminal device.

Msg4 has two functions, one is for contention conflict resolution, and the other is for the network device to transmit the RRC configuration message to the terminal device. There are two methods for contention conflict resolution: one is that if the terminal device carries a Cell Radio Network Temporary Identifier (C-RNTI) in Msg3, then Msg4 uses the PDCCH scheduling scrambled by the C-RNTI. The other is that if the terminal device does not carry C-RNTI in Msg3, such as initial access, Msg4 uses TC-RNTI scrambled PDCCH scheduling, and the conflict resolution is that the terminal device receives the PDSCH of Msg4 and matches the PDSCH in the PDSCH Common Control Channel Service Data Unit (Common Control Channel Service Data Unit, CCCH SDU) implementation.

Introduce the uplink coverage enhancement of NR:

The coverage of the mobile communication network is one of the main network performances concerned by operators. Compared with LTE, 5G works in a higher frequency band. For example: for frequency range 1 (Frequency Rang 1, FR1), the working frequency band is 3.5GHz; for frequency range 2 (Frequency Rang 2, FR2), the working frequency band may be as high as 28GHz or 39GHz. The higher the operating frequency band, the greater the path loss experienced by the signal, resulting in reduced network coverage. Usually, the transmission power of the network equipment is much greater than that of the terminal equipment, so the uplink coverage of the network faces a more serious coverage limitation problem. In order to solve the above problems, the coverage enhancement project was proposed in R17, the main goal is to study the uplink coverage enhancement technology applicable to FR1 and FR2 under Time Division Duplexing (TDD)/Frequency Division Duplexing (FDD) , including coverage enhancement for PUSCH and coverage enhancement for PUCCH. For PUSCH, uplink coverage can be improved by using a repeated transmission mechanism.

Fig. 2 shows a schematic diagram of a system architecture of a communication system provided by an embodiment of the present application. The system architecture may include: a terminal device 10 , an access network device 20 and a core network device 30 .

The terminal device 10 may refer to a UE (User Equipment, user equipment), an access terminal, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a wireless communication device, a user agent or a user device. Optionally, the terminal device can also be a cellular phone, a cordless phone, a SIP (Session Initiation Protocol, session initiation protocol) phone, a WLL (Wireless Local Loop, wireless local loop) station, a PDA (Personal Digital Assistant, personal digital processing) , handheld devices with wireless communication functions, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices, terminal devices in 5GS (5th Generation System, fifth-generation mobile communication system) or future evolution of PLMN (Public Land Mobile Network, public land mobile communication network) terminal equipment, etc., this embodiment of the present application is not limited to this. For convenience of description, the devices mentioned above are collectively referred to as terminal devices. The number of terminal devices 10 is generally multiple, and one or more terminal devices 10 may be distributed in a cell managed by each access network device 20 .

The access network device 20 is a device deployed in an access network to provide a wireless communication function for the terminal device 10 . The access network device 20 may include various forms of macro base stations, micro base stations, relay stations, access points, and so on. In systems using different wireless access technologies, the names of devices with access network device functions may be different. For example, in 5G NR systems, they are called gNodeB or gNB. With the evolution of communication technology, the name "access network equipment" may change. For the convenience of description, in the embodiment of the present application, the above-mentioned devices that provide the wireless communication function for the terminal device 10 are collectively referred to as access network devices. Optionally, a communication relationship may be established between the terminal device 10 and the core network device 30 through the access network device 20 . Exemplarily, in the LTE system, the access network device 20 may be EUTRAN (Evolved Universal Terrestrial Radio Access Network, Evolved Universal Terrestrial Radio Network) or one or more eNodeBs in EUTRAN; in the 5G NR system, the access The network device 20 may be the RAN or one or more gNBs in the RAN.

The functions of the core network device 30 are mainly to provide user connections, manage users, and carry out services, and provide an interface to external networks as a bearer network. For example, the core network equipment in the 5G NR system can include AMF (Access and Mobility Management Function, access and mobility management function) entity, UPF (User Plane Function, user plane function) entity and SMF (Session Management Function, session management function) entity and other equipment. The access network device 20 and the core network device 30 may be collectively referred to as network devices.

In an example, the access network device 20 and the core network device 30 communicate with each other through some air technology, such as the NG interface in the 5G NR system. The access network device 20 and the terminal device 10 communicate with each other through a certain air technology, such as a Uu interface.

Fig. 3 shows a flowchart of a random access method provided by an embodiment of the present application. Fig. 3 illustrates by taking the method applied to the terminal equipment in the communication system shown in Fig. 2 as an example. The method includes:

Step 302: the first terminal determines the signal quality measurement result on the serving cell.

The serving cell is a cell that provides mobile communication services for the first terminal. Optionally, the signal quality measurement result refers to Reference Signal Received Power (Reference Signal Receiving Power, RSRP).

Optionally, the first terminal is a low-power terminal. As an example, Table 1 shows the correspondence between the power level and the maximum transmit power of common terminals. The maximum transmit power of common terminals (non-low-power terminals) is higher than that of low-power terminals.

Table 1

终端功率等级terminal power level	PC1PC1	PC1.5PC1.5	PC2PC2	PC3PC3	PC5PC5
终端最大发射功率(dBm)Terminal maximum transmit power (dBm)	3131	2929	2626	23twenty three	2020

As shown in Table 1, when the power class (Power Class, PC) of the terminal is 1, the maximum transmit power is 31. When the terminal power level is 1.5, the maximum transmit power is 29. When the power level of the terminal is 2, the maximum transmit power is 26. When the power level of the terminal is 3, the maximum transmit power is 23. When the terminal power level is 5, the maximum transmit power is 20.

Optionally, the common terminal is a terminal with a power level of 1, 1.5, 2, 3 or 5, or the common terminal is a terminal with a maximum transmit power of 31, 29, 26, 23 or 20. The first terminals are terminals other than power classes 1, 1.5, 2, 3 and 5. The first terminal is a terminal whose maximum transmit power is not 31, 29, 26, 23 and 20. For example, the first terminal is a terminal whose maximum transmit power is less than 20 dBm. Exemplarily, a terminal with a maximum transmission power in the range of 10-14dBm is a low-power terminal.

Step 304: The first terminal determines whether to request repeated transmission of message 3 in the random access process from the network device according to the signal quality measurement result and the maximum transmit power of the first terminal.

The common terminal will use the signal quality measurement result and the second signal quality threshold when determining whether to request repeated transmission of the message 3 in the random access process from the network device. The second signal quality threshold is configured by the network device for common terminals. In a case where the signal quality measurement result of the common terminal is lower than the second signal quality threshold, the common terminal determines to request the network device for repeated transmission of message 3 in the random access process. The above method can be called the second method.

When the first terminal determines whether to request random access to the network device, the repeated transmission of message 3 will be determined according to the signal quality measurement result and the maximum transmission power of the first terminal. During this process, the first terminal will also use the network device Signal quality threshold configured for the first terminal. The maximum transmission power of the first terminal will affect the determination result of the first terminal determining whether to request repeated transmission of message 3 in the random access process from the network device.

Optionally, the first terminal uses the first manner to determine whether to request repeated transmission of message 3 in the random access process from the network device. The first manner is different from the second manner. The second manner is the manner in which the second terminal determines whether to request repeated transmission of the message 3 from the network device, such as the manner used by the above-mentioned common terminal. Wherein, the maximum transmission power of the first terminal is lower than that of the second terminal. Optionally, the first terminal is a low-power terminal, and the second terminal is a common terminal (or a non-low-power terminal). The first method is the method used by the low-power terminal when determining whether to request the repeated transmission of message 3 in the process of random access to the network device, and the second method is the method used by the ordinary terminal in the process of determining whether to request the random access to the network device The mode at the time of repeated transmission of message 3.

The first terminal requests the network device for repeated transmission of the message 3 in the random access process, which can realize enhanced uplink coverage. The repeated transmission request of message 3 refers to the PUSCH repeated transmission request of message 3 .

Optionally, the manner in which the first terminal determines whether to request repeated transmission of message 3 in the random access process from the network device specifically includes at least one of the following:

· The first method: according to the signal quality measurement result and the first signal quality threshold corresponding to the maximum transmit power of the first terminal, determine whether to request repeated transmission of message 3 in the random access process to the network device.

During the random access process, the first terminal acquires a signal quality measurement result on the serving cell. In the case that the signal quality measurement result is less than or equal to the first signal quality threshold, the first terminal sends a PUSCH repeat transmission request of message 3 to the network device. The first signal quality threshold is the first RSRP threshold.

The first signal quality threshold is different from the second signal quality threshold, and the second signal quality threshold is a signal quality threshold for an ordinary terminal (second terminal) when determining whether to request repeated transmission of message 3 to the network device. The second signal quality threshold is a second RSRP threshold. Optionally, the low-power terminal will use the first RSRP threshold to determine whether to request the network device for repeated transmission of message 3 in the random access process, and the ordinary terminal will use the second RSRP threshold to determine whether to request the network device for random access Repeat transmission of message 3 in process.

Terminals can be divided into low-power terminals and ordinary terminals. If low-power terminals also use the second signal quality threshold to determine whether to request repeated transmission of message 3 in the random access process to the network device, terminals of all power levels will use the same The RSRP threshold is used for judgment. However, for terminals of different power levels covered by the same base station, there is no difference in the supported downlink coverage (the downlink coverage mainly depends on the transmit power of the base station). However, for terminals of different power levels, the supportable uplink coverage may be different. Generally, the higher the terminal power level, the greater the uplink coverage it can support. The lower the power level of the terminal, the smaller the uplink coverage it can support. Therefore, for the manner in which the terminal determines whether to request repeated transmission of Msg3, in addition to considering the RSRP measurement value, the factor of the terminal power level also needs to be considered. That is, for the low-power terminal, it is necessary to make it easier to trigger the repeated transmission of the request Msg3 compared with the common terminal, so as to ensure the uplink coverage of the mobile communication.

• The second type: according to the signal quality measurement result corrected by the third offset value, it is determined whether to request repeated transmission of message 3 in the random access process to the network device.

During the random access process, the first terminal acquires a signal quality measurement result on the serving cell. Then the signal quality measurement result is corrected by using the third offset value, so as to obtain the corrected signal quality measurement result. Then the first terminal will use the corrected signal quality measurement result to determine whether to request the network device for repeated transmission of message 3 in the random access process. Optionally, the corrected signal quality measurement result determined by the first terminal=the signal quality measurement result (for example, RSRP_measured)−the third offset value.

In a case where the corrected signal quality measurement result is less than or equal to the second signal quality threshold, the first terminal sends a PUSCH retransmission request of message 3 to the network device.

Optionally, for the first of the first manners above, the first terminal can determine the first signal quality threshold according to at least one of the following manners:

(1) Receive the first signal quality threshold configured by the network device.

The first terminal receives the first signal quality threshold configured by the network device, that is, the network device configures the first signal quality threshold and sends the configuration information in a broadcast manner. In addition, the network device will also configure the second signal quality threshold, and send the configuration information in the form of broadcast. In addition, the second terminal will also receive the first signal quality threshold and the second signal quality threshold configured by the network device and sent by broadcast. When determining whether to request repeated transmission of message 3 in the random access process from the network device, the terminal determines to use the first signal quality threshold or the second signal quality threshold according to its own power level. Wherein, the first terminal will use the first signal quality threshold, and the second terminal will use the second signal quality threshold.

(2) Determine a first signal quality threshold according to the first offset value.

In the process of using the first offset value to determine the first signal quality threshold, the first terminal will receive the second signal quality threshold configured by the network device and sent by broadcast, and use the first offset value to determine the second signal quality threshold. The threshold is corrected, so as to determine the first signal quality threshold. Optionally, the first signal quality threshold determined by the first terminal=the second signal quality threshold−the first offset value.

Optionally, the first terminal can determine the first offset value in at least one of the following manners:

(2.1) Determine the first offset value according to the difference between the maximum transmit power of the first terminal and the reference maximum transmit power.

Wherein, the reference maximum transmit power is determined by the first terminal according to information configured by the network device and/or predefined information.

Optionally, the formula for calculating the first offset value by the first terminal is as follows:

The first offset value is equal to min{0, (P _{PowerClass -} min(P _{PowerClass_ref} , P _Max ))};

or,

The first offset value is equal to min{0, (P _PowerClass -P _Max )};

or,

The first offset value is equal to min{0, (P _PowerClass -P _{PowerClass_ref} )};

Wherein, P _PowerClass is the maximum transmission power of the first terminal. P _Max is the maximum transmit power of the terminal supported by the cell broadcast by the network device. P _{PowerClass_ref} is the maximum transmit power corresponding to the power class of the reference terminal. P _{PowerClass_ref} is network configured or predefined.

(2.2) Receive the first offset value configured by the network device.

The first terminal receives the first offset value configured by the network device, that is, the network device configures the first offset value and sends it to the first terminal.

(2.3) Determine the first offset value according to the maximum transmit power of the first terminal, the reference maximum transmit power, and the second offset value.

The second offset value is configured by the network device and sent to the first terminal. The first terminal receives the second offset value configured by the network device, and determines the first offset value according to the maximum transmit power of the first terminal, the reference maximum transmit power, and the second offset value. Wherein, the reference maximum transmit power is determined by the first terminal according to information configured by the network device and/or predefined information.

The first offset value is equal to min{0, (P _PowerClass +P _offset -min(P _{PowerClass_ref} , P _Max ))};

or,

The first offset value is equal to min{0, (P _PowerClass +P _offset -P _Max )};

or,

The first offset value is equal to min{0, (P _PowerClass +P _offset -P _{PowerClass_ref} )};

Wherein, P _PowerClass is the maximum transmission power of the first terminal. P _Max is the maximum transmit power of the terminal supported by the cell broadcast by the network device. P _{PowerClass_ref} is the maximum transmit power corresponding to the power class of the reference terminal. P _offset is the second offset value. P _{PowerClass_ref} is network configured or predefined.

Optionally, for the second of the foregoing first manners, the first terminal can determine the third offset value in the following manner:

(1) Determine a third offset value according to the difference between the maximum transmit power of the first terminal and the reference maximum transmit power.

Optionally, the formula for calculating the third offset value by the first terminal is as follows:

The third offset value is equal to max{0, (min(P _{PowerClass_ref} , P _Max )−P _PowerClass )};

or,

The third offset value is equal to max{0, (P _Max -P _PowerClass )};

or,

The third offset value is equal to max{0, (P _{PowerClass_ref} -P _PowerClass )};

Wherein, P _PowerClass is the maximum transmit power of the first terminal. P _Max is the maximum transmit power of the terminal supported by the cell broadcast by the network device. P _{PowerClass_ref} is the maximum transmit power corresponding to the power class of the reference terminal. P _{PowerClass_ref} is network configured or predefined.

(2) Receive the third offset value configured by the network device.

The first terminal receives the third offset value configured by the network device, that is, the network device configures the third offset value and sends it to the first terminal.

(3) Determine a third offset value according to the maximum transmit power of the first terminal, the reference maximum transmit power, and the fourth offset value.

The fourth offset value is configured by the network device and sent to the first terminal. The first terminal receives the fourth offset value configured by the network device, and determines the third offset value according to the maximum transmit power of the first terminal, the reference maximum transmit power, and the fourth offset value. Wherein, the maximum transmit power of the first terminal is the maximum transmit power of the first terminal. The reference maximum transmit power is determined by the first terminal according to information configured by the network device and/or predefined information.

The third offset value is equal to max{0, (min(P _{PowerClass_ref} , P _Max )-(P _PowerClass +P _offset ))};

or,

The third offset value is equal to max{0, (P _Max -(P _PowerClass +P _offset ))};

or,

The third offset value is equal to max{0, (P _{PowerClass_ref} - (P _PowerClass + P _offset ))};

Wherein, P _PowerClass is the maximum transmission power of the first terminal. P _Max is the maximum transmit power of the terminal supported by the cell broadcast by the network device. P _{PowerClass_ref} is the maximum transmit power corresponding to the power class of the reference terminal. P _offset is the fourth offset value. P _{PowerClass_ref} is network configured or predefined.

Optionally, the foregoing signal quality measurement results include any of the following:

Cell-level RSRP measurement results;

RSRP measurement results on the target Synchronization Signal Block (SSB). The target SSB is the SSB with the best measurement result or the SSB with the measurement result greater than the measurement threshold. Optionally, the measurement threshold is configured by the network device. When there are multiple SSBs whose measurement results are greater than the measurement threshold, the first terminal will arbitrarily select a target SSB from them.

To sum up, in the method provided by this embodiment, the first terminal can determine whether to request repeated transmission of message 3 in the random access process from the network device according to the signal quality measurement result and the maximum transmit power of the first terminal, so that Realize the uplink coverage enhancement of mobile communication. In this process, the difference between the maximum transmission powers of the terminals can be considered, so that the terminal with the lower maximum transmission power can more easily trigger the repeated transmission of the request Msg3, so as to realize targeted enhancement of the uplink coverage of the mobile communication.

Fig. 4 shows a flowchart of a random access method provided by an embodiment of the present application. FIG. 4 uses an example in which the method is applied to a network device in the communication system shown in FIG. 2 . The method includes:

Step 402: The network device receives the repeated transmission request of message 3 in the random access process sent by the first terminal.

Wherein, the repeated transmission request of message 3 is determined by the first terminal according to the signal quality measurement result on the serving cell and the maximum transmit power of the first terminal. Optionally, the first terminal is a low-power terminal, and the maximum transmission power of the low-power terminal is lower than that of an ordinary terminal.

The common terminal will use the signal quality measurement result and the second signal quality threshold when determining whether to request repeated transmission of the message 3 in the random access process from the network device. The second signal quality threshold is configured by the network device for common terminals. The above method can be called the second method.

Optionally, the first terminal uses the first manner to determine whether to request repeated transmission of message 3 in the random access process from the network device. The first way is different from the second way. The second way is a way for the second terminal to determine whether to request repeated transmission of the message 3 from the network device, such as the way used by the above-mentioned common terminal. The maximum transmission power of the first terminal is lower than that of the second terminal. Optionally, the first terminal is a low-power terminal, and the second terminal is a common terminal (or a non-low-power terminal). The first method is the method used by the low-power terminal when determining whether to request the repeated transmission of message 3 in the process of random access to the network device, and the second method is the method used by the ordinary terminal in the process of determining whether to request the random access to the network device The mode at the time of repeated transmission of message 3.

The first terminal requests the network device for repeated transmission of the message 3 in the random access process, which can realize enhanced uplink coverage. The retransmission request of message 3 refers to the PUSCH retransmission request of message 3.

Optionally, before the network device receives the repeated transmission request of message 3 in the random access process sent by the first terminal, the network device first configures different information for the first terminal, so that the first terminal information, and determine the repeated transmission request of message 3 through the first method. It specifically includes at least one of the following situations:

• For the case where the first terminal determines the retransmission request of the message 3 according to the first signal quality threshold.

The first signal quality threshold is different from the second signal quality threshold, and the second signal quality threshold is the signal quality threshold when the second terminal determines whether to request repeated transmission of the message 3 from the network device. The first signal quality threshold is the first RSRP threshold. The second signal quality threshold is a second RSRP threshold. Optionally, the low-power terminal will use the first RSRP threshold to determine whether to request the network device for repeated transmission of message 3 in the random access process, and the ordinary terminal will use the second RSRP threshold to determine whether to request the network device for random access Repeat transmission of message 3 in process.

In this case, the network device configures information for the first terminal in at least one of the following ways:

configuring a first signal quality threshold for the first terminal;

Configuring a second signal quality threshold and information for determining a first offset value for the first terminal;

Configuring a second signal quality threshold and a first offset value for the first terminal;

Wherein, the first terminal can modify the second signal quality threshold according to the first offset value, so as to obtain the first signal quality threshold.

· For the case where the first terminal determines the retransmission request of message 3 according to the corrected signal quality measurement result.

Wherein, the corrected signal quality measurement result is determined by the first terminal using the third offset value to correct and determine the signal quality measurement result obtained by the first terminal on the serving cell. In a case where the corrected signal quality measurement result is less than or equal to the second signal quality threshold, the first terminal sends a PUSCH retransmission request of message 3 to the network device.

Configuring a second signal quality threshold and information for determining a third offset value for the first terminal;

Configure the second signal quality threshold and the third offset value for the first terminal.

Cell-level RSRP measurement results;

RSRP measurement results on the target SSB. The target SSB is the SSB with the best measurement result or the SSB with the measurement result greater than the measurement threshold.

Optionally, the first terminal can determine whether to request repeated transmission of the message 3 from the network device by using different information.

The first type: the first terminal determines whether to request repeated transmission of the message 3 from the network device according to the first signal quality threshold.

Fig. 5 shows a flowchart of a random access method provided by an embodiment of the present application. FIG. 5 exemplifies that the method is applied to the communication system shown in FIG. 2 . The method includes:

Step 502: The network device configures first configuration information for the first terminal, where the first configuration information includes a first signal quality threshold.

The first configuration information is used by the first terminal to determine whether to request the network device for repeated PUSCH transmission of Msg3. Optionally, the first configuration information further includes the first PRACH resource configuration used for the first terminal to request the repeated PUSCH transmission of Msg3.

The first signal quality threshold is a signal quality threshold corresponding to the maximum transmit power of the first terminal. The first signal quality threshold is different from the second signal quality threshold, and the second signal quality threshold is the signal quality threshold when the second terminal determines whether to request repeated transmission of Msg3 from the network device. Optionally, the first signal quality threshold is a first RSRP threshold. The second signal quality threshold is a second RSRP threshold.

The maximum transmission power of the first terminal is lower than that of the second terminal. Optionally, the first terminal is a low-power terminal, and the second terminal is a common terminal. The low-power terminal will use the first RSRP threshold to determine whether to request the repeated transmission of Msg3 in the random access process to the network device, and the ordinary terminal will use the second RSRP threshold to determine whether to request the network device for the Msg3 in the random access process Repeat transmission. For example, the first terminal is a terminal with a power class other than 1, 1.5, 2, 3 and 5. For example, the first terminal is a terminal whose maximum transmit power is not 31, 29, 26, 23 and 20. For example, the first terminal is a terminal whose maximum transmit power is less than 20 dBm.

Optionally, the manner in which the network device configures the first configuration information for the first terminal includes at least one of the following:

(1) Configuring the same first signal quality threshold for low-power terminals.

For low-power terminals (including the first terminal) of different power levels, the network device can configure the same first signal quality threshold for them. In some embodiments, the network device may also configure different first signal quality thresholds corresponding to power levels for low-power terminals of different power levels. Optionally, the first signal quality thresholds corresponding to low-power terminals of different power levels are the same or different.

As an example, Table 2 shows the correspondence between the power level of the terminal and the signal quality threshold.

Table 2

As shown in Table 2, each power level corresponds to a signal quality threshold. Wherein, power level 1>power level 2>power level 3>power level 4>power level 5, the second signal quality threshold<the first signal quality threshold. The network device configures a second signal quality threshold for a terminal (ordinary terminal) whose power level is not lower than power level 2. For a terminal (low-power terminal) whose maximum transmission power is lower than power level 2, the network device configures the first signal quality threshold for it. Moreover, for low-power terminals of different power levels, the first signal quality thresholds configured by the network device are the same.

It should be noted that the above corresponding relationship is only used as an example, and is not intended to limit the method provided in the embodiment of the present application.

(2) Configuring the first signal quality threshold for the terminal according to the first correspondence relationship.

The network device can configure the first signal quality threshold for the terminal according to the first correspondence relationship. Wherein, the first corresponding relationship includes the corresponding relationship between different power levels (or maximum transmit power) and different signal quality thresholds.

That is, for terminals with different power levels, the signal quality threshold configured by the network device for the power level (or maximum transmission power) of the terminal will be received. The first correspondence includes a correspondence between the first terminal and the first signal quality threshold. Therefore, the network device can configure the first signal quality threshold for the first terminal.

Optionally, the first correspondence can reflect that each signal quality threshold indicated by the network device corresponds to a power level of at least one terminal. Alternatively, the first correspondence can reflect that the power levels of N terminals correspond to N signal quality thresholds, and at the same time, the power levels of terminals are negatively correlated with their corresponding signal quality thresholds. The higher the power level of the terminal (the higher the maximum transmit power), the lower the corresponding signal quality threshold. The lower the power level of the terminal (the lower the maximum transmit power), the higher the corresponding signal quality threshold.

(3) Configuring the first signal quality threshold for the terminal according to the reference power and the first corresponding relationship.

The network device configures the second signal quality threshold for terminals whose maximum transmit power is not lower than the reference power. In addition, the network device configures the first signal quality threshold according to the first corresponding relationship for the terminal whose maximum transmission power is lower than the reference power. Wherein, the first corresponding relationship includes the corresponding relationship between different power levels (or maximum transmit power) and different signal quality thresholds.

That is, for a terminal (such as a second terminal) whose maximum transmission power is higher than or equal to the reference power, it will receive the second signal quality threshold configured by the network device. At this time, the terminal will use the second method to determine the repeated transmission request of message 3 . For a terminal whose maximum transmission power is lower than the reference power, it will receive the signal quality threshold configured by the network device for the power level of the terminal. Wherein, the first corresponding relationship includes the corresponding relationship between different power levels and different signal quality thresholds. The first correspondence includes a correspondence between the first terminal and the first signal quality threshold. Therefore, the network device can configure the first signal quality threshold for the first terminal.

As an example, Table 3 shows the correspondence between the power level of the terminal and the signal quality threshold.

table 3

As shown in Table 3, each power level corresponds to a signal quality threshold. Wherein, power level 1>power level 2>power level 3>power level 4>power level 5, second signal quality threshold<first signal quality threshold1<first signal quality threshold2<first signal quality threshold3. The network device configures a second signal quality threshold for terminals whose power level is not lower than power level 2 (reference power). For a terminal whose maximum transmission power is lower than power level 2 (reference power), the network device configures the first signal quality threshold for it according to the first correspondence. The first correspondence includes that power level 3 corresponds to the first signal quality threshold 1, power level 4 corresponds to the first signal quality threshold 2, and power level 5 corresponds to the first signal quality threshold 3. Wherein, a terminal with a power level of power level 1 or power level 2 is an ordinary terminal, and a terminal with a power level of power level 3, power level 4, or power level 5 is a low-power terminal.

Optionally, the above reference power is equal to P _Max ;

or,

Reference power is equal to _{PPowerClass_ref} ;

or,

Reference power is equal to min(P _Max , P _{PowerClass_ref} );

Wherein, P _Max is the maximum transmit power of the terminal supported by the cell broadcast by the network device. P _{PowerClass_ref} is the maximum transmit power corresponding to the power class of the reference terminal. P _{PowerClass_ref} is network configured or predefined.

Step 504: The first terminal receives the first configuration information broadcast by the network device.

The first configuration information received by the first terminal is configured by the network device through at least one of the above three ways of configuring the first configuration information for the first terminal.

Step 506: The first terminal uses the first signal quality threshold to determine whether to request repeated transmission of message 3 from the network device.

During the random access process, the first terminal acquires a signal quality measurement result on the serving cell. In the case that the signal quality measurement result is less than or equal to the first signal quality threshold, the first terminal sends a PUSCH repeat transmission request of message 3 to the network device.

When the network device configures the first signal quality threshold for the first terminal through the above first method of configuring the first configuration information, the first terminal will use the first signal quality threshold to determine whether to request repeated PUSCH transmission of Msg3.

When the network device configures the first signal quality threshold for the first terminal through the second or third method of configuring the first configuration information above, the first terminal will use the first signal quality threshold corresponding to the power level of the first terminal Determine whether to request PUSCH repeat transmission of Msg3.

Exemplarily, the first terminal requests the PUSCH repeated transmission of Msg3 by sending Msg1 to the network device by using resources under the first PRACH resource configuration.

Cell-level RSRP measurement results;

Exemplarily, FIG. 6 is a schematic diagram of a process of determining whether to request repeated transmission of message 3 from a network device provided by an exemplary embodiment of the present application. As shown in FIG. 6 , the low-power terminal 601 determines whether to request repeated transmission of Msg3 according to the magnitude relationship between the signal quality measurement value 603 and the first signal quality threshold 604 . When the signal quality measurement value 603 determined by the low-power terminal 601 is less than or equal to the first signal quality threshold 604, the low-power terminal 601 determines to request repeated transmission of Msg3. When the signal quality measurement value 603 determined by the low-power terminal 601 is greater than the first signal quality threshold 604, the low-power terminal 601 determines not to request repeated transmission of Msg3. The ordinary terminal 602 determines whether to request repeated transmission of Msg3 according to the magnitude relationship between the signal quality measurement value 603 and the second signal quality threshold 605 . When the signal quality measurement value 603 determined by the ordinary terminal 602 is less than or equal to the second signal quality threshold 605, the ordinary terminal 602 determines to request repeated transmission of Msg3. When the signal quality measurement value 603 determined by the ordinary terminal 602 is greater than the second signal quality threshold 605, the ordinary terminal 602 determines not to request repeated transmission of Msg3.

It can be seen from FIG. 6 that the first signal quality threshold is higher than the second signal quality threshold. Therefore, using the first signal quality threshold can make it easier for terminals with lower maximum transmit power to trigger repeated transmission of the request Msg3, thereby improving the maximum Enhanced uplink coverage for terminals with lower transmit power.

It should be noted that the above step 502 can be implemented independently as an information configuration method on the network device side. The above step 506 can be independently implemented as a random access method on the first terminal side.

To sum up, with the method provided in this embodiment, the first terminal can determine whether to request repeated transmission of message 3 in the random access process to the network device according to the first configuration information, so as to realize uplink coverage enhancement of mobile communication. In this process, the difference between the maximum transmission powers of the terminals can be considered, so that the terminal with the lower maximum transmission power can more easily trigger the repeated transmission of the request Msg3, so as to realize targeted enhancement of the uplink coverage of the mobile communication.

Moreover, the above method fully considers the differences in uplink coverage brought about by the differences in terminal power levels of different terminals, so that the terminals can more accurately determine whether to request message 3 for uplink coverage enhancement according to their own power levels. For terminals with a high power level, the problem of waste of resources caused by inaccurate measurement results of evaluating signal quality can be avoided. For terminals with low power levels, the problem of limited uplink coverage caused by inaccurate evaluation signal quality measurement results can be avoided.

The second type: the first terminal determines the first signal quality threshold according to the first offset value and the second signal quality threshold, and uses the first signal quality threshold to determine whether to request repeated transmission of message 3 to the network device.

FIG. 7 shows a flowchart of a random access method provided by an embodiment of the present application. FIG. 7 uses an example in which the method is applied to the communication system shown in FIG. 2 . The method includes:

Step 702: The network device configures second configuration information for the first terminal, where the second configuration information includes information for determining a first signal quality threshold.

The second configuration information is used by the first terminal to determine whether to request the network device for repeated PUSCH transmission of Msg3. Optionally, the second configuration information further includes the first PRACH resource configuration used for the first terminal to request the repeated transmission of the PUSCH of Msg3.

The first terminal can determine the first signal quality threshold according to the second configuration information. The first signal quality threshold is a signal quality threshold corresponding to the maximum transmit power of the first terminal. The first signal quality threshold is different from the second signal quality threshold, and the second signal quality threshold is the signal quality threshold when the second terminal determines whether to request repeated transmission of Msg3 from the network device. Optionally, the first signal quality threshold is a first RSRP threshold. The second signal quality threshold is a second RSRP threshold.

Optionally, the manner in which the network device configures the second configuration information for the first terminal includes at least one of the following:

(1) Configuring the second signal quality threshold and information for determining the first offset value (excluding the second offset value) for the first terminal.

Wherein, the first offset value is used to modify the second signal quality threshold to obtain the first signal quality threshold. The first terminal will receive the second signal quality threshold configured by the network device, and use the information used to determine the first offset value to determine the first offset value, thereby using the first offset value to correct the second signal quality threshold to obtain the first The signal quality threshold, and then use the first signal quality threshold to determine the repeat transmission request of Msg3.

Optionally, the information used to determine the first offset value includes at least one of the following information:

The maximum transmit power of the terminal supported by the cell;

Refer to the maximum transmit power corresponding to the power level of the terminal.

Wherein, the maximum transmission power corresponding to the power level of the reference terminal is configured or predefined by the network.

(2) Configuring the second signal quality threshold and the first offset value for the first terminal.

Wherein, the first offset value is used to modify the second signal quality threshold to obtain the first signal quality threshold. The first terminal will receive the second signal quality threshold and the first offset value configured by the network device, and use the first offset value to modify the second signal quality threshold to obtain the first signal quality threshold, thereby using the first signal quality threshold to determine Msg3 repeated transfer requests.

Optionally, the network device configures the second signal quality threshold for terminals whose maximum transmission power is not lower than the reference power. In addition, the network device configures a second signal quality threshold for terminals whose maximum transmit power is lower than the reference power, and configures the first offset value according to the second correspondence. Wherein, the second corresponding relationship includes a corresponding relationship between different power levels (or maximum transmit power) and different first offset values.

That is, for a terminal (such as a second terminal) whose maximum transmission power is not lower than the reference power, it will receive the second signal quality threshold configured by the network device. At this time, the terminal will use the second method to determine the repeated transmission request of message 3 . For a terminal whose maximum transmission power is lower than the reference power, the first offset value configured by the network device for the power level of the terminal will be received. Wherein, the second correspondence includes a correspondence between the first terminal and the first offset value. Therefore, the network device can configure the first offset value for the first terminal.

Alternatively, the network device configures the second signal quality threshold for terminals whose maximum transmission power is equal to the reference power. The network device configures a second signal quality threshold for terminals whose maximum transmission power is not equal to the reference power, and configures the first offset value according to the second corresponding relationship. Wherein, the second corresponding relationship includes a corresponding relationship between different power levels (or maximum transmit power) and different first offset values.

That is, for a terminal (such as the second terminal) whose maximum transmission power is equal to the reference power, it will receive the second signal quality threshold configured by the network device. At this time, the terminal will use the second method to determine the repeated transmission request of message 3 . For a terminal whose maximum transmission power is not equal to the reference power, the first offset value configured by the network device for the power level of the terminal will be received. Wherein, the second correspondence includes a correspondence between the first terminal and the first offset value. Therefore, the network device can configure the first offset value for the first terminal.

By way of example, Table 4 shows the correspondence between the power level of the terminal and the first offset value.

Table 4

功率等级power level		功率等级3Power class 3	功率等级4 Power Class 4	功率等级5Power class 5	功率等级6Power Class 6
信号质量门限Signal Quality Threshold	第一偏移值1first offset value 1	第一偏移值2first offset value 2	第一偏移值2first offset value 2	第一偏移值3first offset value 3

As shown in Table 4, each power level corresponds to a first offset value. The second correspondence includes that power level 3 corresponds to the first offset value 1, power level 4 corresponds to the first offset value 2, power level 5 corresponds to the first offset value 2, and power level 6 corresponds to the first offset value 3. Wherein, power level 3>power level 4>power level 5>power level 6, first offset value 1>first offset value 2>first offset value 3. The higher the power level, the larger the corresponding first offset value. Different power levels can correspond to the same or different first offset values. A terminal with a power level of power level 3, power level 4, power level 5, or power level 6 is a low-power terminal.

Optionally, the reference power is equal to P _Max ;

or,

Reference power is equal to _{PPowerClass_ref} ;

or,

Reference power is equal to min(P _Max , P _{PowerClass_ref} );

(3) Configuring the second signal quality threshold and information for determining the first offset value (including the second offset value) for the first terminal.

The second offset value and the maximum transmit power of the terminal supported by the cell;

The second offset value and the maximum transmission power corresponding to the reference terminal power level;

The second offset value, the maximum transmit power of the terminal supported by the cell, and the maximum transmit power corresponding to the power level of the reference terminal.

Step 704: The first terminal receives the second configuration information broadcast by the network device.

The second configuration information received by the first terminal can be configured by the network device through at least one of the above three ways of configuring the second configuration information for the first terminal.

Step 706: The first terminal determines a first signal quality threshold according to the second configuration information.

The first signal quality threshold determined by the first terminal=the second signal quality threshold−the first offset value. The situation where the first terminal determines the first offset value according to the second configuration information, so as to determine the first signal quality threshold may include at least one of the following:

(1) In a case where the information for determining the first offset value does not include the second offset value.

The first terminal can determine the first offset value according to the difference between the maximum transmit power of the first terminal and the reference maximum transmit power, thereby determining the first signal quality threshold. Optionally, the formula for calculating the first offset value by the first terminal is as follows:

or,

The first offset value is equal to min{0, (P _PowerClass -P _Max )};

or,

Wherein, P _PowerClass is the maximum transmission power of the first terminal.

(2) When the first offset value is acquired.

When the first terminal acquires the first offset value, it can directly use the first offset value to modify the second signal quality threshold, so as to obtain the first signal quality threshold. Moreover, when the network device configures the first offset value for the first terminal through the second correspondence, the first offset value used by the first terminal when modifying the second signal quality threshold is the first offset value corresponding to the power level of the first terminal. offset value.

(3) In the case where the information for determining the first offset value includes the second offset value.

The first terminal can determine the first offset value according to the maximum transmit power of the first terminal, the reference maximum transmit power, and the second offset value, thereby determining the first signal quality threshold. Optionally, the formula for calculating the first offset value by the first terminal is as follows:

or,

The first offset value is equal to min{0, (P _PowerClass +P _offset -P _Max )};

or,

Wherein, P _offset is the second offset value.

Step 708: The first terminal uses the first signal quality threshold to determine whether to request repeated transmission of message 3 from the network device.

During the random access process, the first terminal acquires a signal quality measurement result on the serving cell. In the case that the signal quality measurement result is less than or equal to the first signal quality threshold, the first terminal sends a PUSCH repeat transmission request of message 3 to the network device. For example, the first terminal sends Msg1 to the network device by using resources under the first PRACH resource configuration to request repeated PUSCH transmission of Msg3.

Cell-level RSRP measurement results;

Exemplarily, FIG. 8 is a schematic diagram of a process of determining whether to request repeated transmission of message 3 from a network device provided by an exemplary embodiment of the present application. As shown in FIG. 8 , the low-power terminal 801 determines whether to request repeated transmission of Msg3 according to the magnitude relationship between the signal quality measurement value 803 and the first signal quality threshold 804 . The first signal quality threshold 804 is determined by the low-power terminal 801 using the first offset value 806 to modify the second signal quality threshold 805 . When the signal quality measurement value 803 determined by the low-power terminal 801 is less than or equal to the first signal quality threshold 804, the low-power terminal 801 determines to request repeated transmission of Msg3. When the signal quality measurement value 803 determined by the low-power terminal 801 is greater than the first signal quality threshold 804, the low-power terminal 801 determines not to request repeated transmission of Msg3. The ordinary terminal 802 determines whether to request repeated transmission of Msg3 according to the magnitude relationship between the signal quality measurement value 803 and the second signal quality threshold 805 . When the signal quality measurement value 803 determined by the ordinary terminal 802 is less than or equal to the second signal quality threshold 805, the ordinary terminal 802 determines to request repeated transmission of Msg3. When the signal quality measurement value 803 determined by the ordinary terminal 802 is greater than the second signal quality threshold 805, the ordinary terminal 802 determines not to request repeated transmission of Msg3.

It can be seen from FIG. 8 that the first signal quality threshold is higher than the second signal quality threshold. Therefore, using the first signal quality threshold can make it easier for terminals with lower maximum transmit power to trigger repeated transmission of the request Msg3, thereby improving the maximum Enhanced uplink coverage for terminals with lower transmit power.

It should be noted that the above step 702 can be implemented independently as an information configuration method on the network device side. The above step 706 can independently implement a method for determining the first signal quality threshold at the first terminal side. The above step 708 can be independently implemented as a random access method on the first terminal side.

To sum up, with the method provided in this embodiment, the first terminal can determine whether to request repeated transmission of message 3 in the random access process to the network device according to the second configuration information, so as to realize uplink coverage enhancement of mobile communication. In this process, the difference between the maximum transmission powers of the terminals can be considered, so that the terminal with the lower maximum transmission power can more easily trigger the repeated transmission of the request Msg3, so as to realize targeted enhancement of the uplink coverage of the mobile communication.

The third method: the first terminal determines whether to request repeated transmission of the message 3 from the network device according to the corrected signal quality measurement result and the second signal quality threshold.

FIG. 9 shows a flowchart of a random access method provided by an embodiment of the present application. FIG. 9 exemplifies that the method is applied to the communication system shown in FIG. 2 . The method includes:

Step 902: The network device configures third configuration information for the first terminal, where the third configuration information includes information for correcting a signal quality measurement result.

The third configuration information is used by the first terminal to determine whether to request the network device for repeated PUSCH transmission of Msg3. Optionally, the third configuration information includes the first PRACH resource configuration for the PUSCH repeated transmission requested by the first terminal for Msg3.

The first terminal can correct the signal quality measurement result by using the third offset value according to the third configuration information. A corrected signal quality measurement result is thereby obtained. Then the first terminal will use the corrected signal quality measurement result to determine whether to request the network device for repeated transmission of message 3 in the random access process. The corrected signal quality measurement result is different from the initial signal quality measurement result, and the initial signal quality measurement result is the signal measurement result when the second terminal determines whether to request repeated transmission of Msg3 from the network device.

The maximum transmission power of the first terminal is lower than that of the second terminal. Optionally, the first terminal is a low-power terminal, and the second terminal is a common terminal. The low-power terminal will use the corrected signal quality measurement result to determine whether to request the network device for repeated transmission of Msg3 during the random access process, and the ordinary terminal will use the initial signal quality measurement result to determine whether to request the network device for the random access process Repeated transmission of Msg3 in . For example, the first terminal is a terminal with a power class other than 1, 1.5, 2, 3 and 5. For example, the first terminal is a terminal whose maximum transmit power is not 31, 29, 26, 23 and 20. For example, the first terminal is a terminal whose maximum transmit power is less than 20 dBm.

Optionally, the manner in which the network device configures the third configuration information for the first terminal includes at least one of the following:

(1) Configuring the second signal quality threshold and information for determining the third offset value (excluding the fourth offset value) for the first terminal.

Optionally, the information used to determine the third offset value includes at least one of the following information:

The maximum transmit power of the terminal supported by the cell;

(2) Configuring the second signal quality threshold and the third offset value for the first terminal.

Optionally, the network device configures the second signal quality threshold for terminals whose maximum transmission power is not lower than the reference power. The network device configures the second signal quality threshold for terminals whose maximum transmission power is lower than the reference power, and configures the third offset value according to the third corresponding relationship. Wherein, the third corresponding relationship includes a corresponding relationship between different power levels (or maximum transmit power) and different third offset values.

That is, for a terminal (such as a second terminal) whose maximum transmission power is not lower than the reference power, it will receive the second signal quality threshold configured by the network device. At this time, the terminal will use the second method to determine the repeated transmission request of message 3 . For a terminal whose maximum transmission power is lower than the reference power, a third offset value configured by the network device for the power level of the terminal will be received. Wherein, the third correspondence includes a correspondence between the first terminal and the third offset value. Therefore, the network device can configure the third offset value for the first terminal.

Optionally, the network device configures the second signal quality threshold for terminals whose maximum transmit power is equal to the reference power. The network device configures the second signal quality threshold for the terminal whose maximum transmit power is not equal to the reference power, and configures the third offset value according to the third corresponding relationship. Wherein, the third corresponding relationship includes a corresponding relationship between different power levels (or maximum transmit power) and different third offset values.

That is, for a terminal (such as the second terminal) whose maximum transmission power is equal to the reference power, it will receive the second signal quality threshold configured by the network device. At this time, the terminal will use the second method to determine the repeated transmission request of message 3 . For a terminal whose maximum transmission power is not equal to the reference power, a third offset value configured by the network device for the power level of the terminal will be received. Wherein, the third correspondence includes a correspondence between the first terminal and the third offset value. Therefore, the network device can configure the third offset value for the first terminal.

By way of example, Table 5 shows the correspondence between the power level of the terminal and the third offset value.

table 5

功率等级power level		功率等级3Power class 3	功率等级4 Power Class 4	功率等级5Power class 5	功率等级6Power Class 6
信号质量门限Signal Quality Threshold	第三偏移值1third offset value 1	第三偏移值2third offset value 2	第三偏移值2third offset value 2	第三偏移值3third offset value 3

As shown in Table 5, each power level corresponds to a third offset value. The third correspondence relationship includes that power level 3 corresponds to the third offset value 1, power level 4 corresponds to the third offset value 2, power level 5 corresponds to the third offset value 2, and power level 6 corresponds to the third offset value 3. Wherein, power level 3>power level 4>power level 5>power level 6, third offset value 1<third offset value 2<third offset value 3. The higher the power level, the smaller the corresponding third offset value. Different power levels can correspond to the same or different third offset values. A terminal with a power level of power level 3, power level 4, power level 5, or power level 6 is a low-power terminal.

Optionally, the above reference power is equal to P _Max ;

or,

Reference power is equal to _{PPowerClass_ref} ;

or,

Reference power is equal to min(P _Max , P _{PowerClass_ref} );

(3) Configuring the second signal quality threshold and information for determining the third offset value (including the fourth offset value) for the first terminal.

The fourth offset value and the maximum transmit power of the terminal supported by the cell;

The fourth offset value and the maximum transmission power corresponding to the power level of the reference terminal;

The fourth offset value, the maximum transmit power of the terminal supported by the cell, and the maximum transmit power corresponding to the power level of the reference terminal.

Step 904: The first terminal receives the third configuration information broadcast by the network device.

The third configuration information received by the first terminal can be configured by the network device through at least one of the above three ways of configuring the third configuration information for the first terminal.

Step 906: The first terminal determines the corrected signal quality measurement result according to the third configuration information.

The corrected signal quality measurement result determined by the first terminal=the signal quality measurement result−the third offset value. The situation where the first terminal determines the third offset value according to the third configuration information, so as to determine the corrected signal quality measurement result may include at least one of the following:

(1) In a case where the information for determining the third offset value does not include the fourth offset value.

The first terminal can determine the third offset value according to the difference between the maximum transmit power of the first terminal and the reference maximum transmit power, so as to determine the corrected signal quality measurement result. Optionally, the formula for calculating the third offset value by the first terminal is as follows:

or,

The third offset value is equal to max{0, (P _Max -P _PowerClass )};

or,

Wherein, P _PowerClass is the maximum transmission power of the first terminal.

(2) When the third offset value is acquired.

When the first terminal acquires the third offset value, it can directly use the third offset value to correct the signal quality measurement result, so as to obtain the corrected signal quality measurement result. Moreover, when the network device configures the third offset value for the first terminal through the third correspondence, the third offset value used by the first terminal when correcting the signal quality measurement result is the third offset value corresponding to the power level of the first terminal. transfer value.

(3) In the case where the information for determining the third offset value includes the fourth offset value.

The first terminal can determine the third offset value according to the maximum transmit power of the first terminal, the reference maximum transmit power, and the fourth offset value, so as to determine the corrected signal quality measurement result. Optionally, the formula for calculating the third offset value by the first terminal is as follows:

or,

Wherein, P _offset is the fourth offset value.

Step 908: the first terminal uses the corrected signal quality measurement result to determine whether to request repeated transmission of message 3 from the network device.

During the random access process, the first terminal acquires the signal quality measurement result on the serving cell, and uses the third offset value to correct the signal quality measurement result to obtain the corrected signal quality measurement result. In a case where the corrected signal quality measurement result is less than or equal to the second signal quality threshold, the first terminal sends a PUSCH retransmission request of message 3 to the network device. For example, the first terminal sends Msg1 to the network device by using resources under the first PRACH resource configuration to request repeated PUSCH transmission of Msg3.

Cell-level RSRP measurement results;

Exemplarily, FIG. 10 is a schematic diagram of a process of determining whether to request repeated transmission of message 3 from a network device provided by an exemplary embodiment of the present application. As shown in FIG. 10 , the low-power terminal 1001 determines whether to request repeated transmission of Msg3 according to the magnitude relationship between the corrected signal quality measurement value 1003 and the second signal quality threshold 1004 . When the corrected signal quality measurement value 1003 determined by the low-power terminal 1001 is less than or equal to the second signal quality threshold 1004, the low-power terminal 1001 determines to request repeated transmission of Msg3. When the corrected signal quality measurement value 1003 determined by the low-power terminal 1001 is greater than the second signal quality threshold 1004, the low-power terminal 1001 determines not to request repeated transmission of Msg3. The ordinary terminal 1002 can also use the corrected signal quality measurement value 1003 to determine whether to deny the repeated transmission of the request Msg3. Alternatively, the common terminal uses the initial signal quality measurement value to determine whether to deny the repeated transmission of the request Msg3.

It should be noted that the above step 902 can be implemented independently as an information configuration method on the network device side. The above-mentioned step 906 can independently implement a method for correcting the signal quality measurement result on the first terminal side. The above step 908 can be implemented as a random access method on the first terminal side alone.

To sum up, with the method provided in this embodiment, the first terminal can determine whether to request repeated transmission of message 3 in the random access process to the network device according to the third configuration information, so as to realize uplink coverage enhancement of mobile communication. In this process, the difference between the maximum transmission powers of the terminals can be considered, so that the terminal with the lower maximum transmission power can more easily trigger the repeated transmission of the request Msg3, so as to realize targeted enhancement of the uplink coverage of the mobile communication.

Optionally, the method provided in this application can also be used in a scenario of sidelink (sidelink) communication. details as follows:

Fig. 11 shows a flowchart of a random access method provided by an embodiment of the present application. FIG. 11 exemplifies that the method is applied to a first terminal and a second terminal supporting sidelink communication. The method includes:

Step 1102: the first terminal receives side travel information sent by the second terminal.

Sidelink communication is a device-to-device communication method with high spectral efficiency and low transmission delay. Compared with Uu interface communication, sidelink communication has the characteristics of short delay and low overhead, which is very suitable for direct communication between terminal equipment and other terminal equipment with close geographic location. Two terminal equipment can communicate through sidelink for direct communication.

Optionally, the maximum transmit power of the first terminal is lower than that of the second terminal. The first terminal is a low-power terminal, and the second terminal is a common terminal. For example, the first terminal is a terminal with a power class other than 1, 1.5, 2, 3 and 5. For example, the first terminal is a terminal whose maximum transmit power is not 31, 29, 26, 23 and 20. For example, the first terminal is a terminal whose maximum transmit power is less than 20 dBm.

Wherein, the second terminal can send the configuration information of the network device to the first terminal. In this case, the second terminal may be called a relay terminal, and the first terminal may be called a remote terminal. Exemplarily, FIG. 12 is a schematic diagram of a connection relationship between a first terminal supporting sidelink communication and a second terminal provided by an exemplary embodiment of the present application. As shown in FIG. 12 , there are generally multiple remote terminals 1201 , and one or more remote terminals 1201 may be distributed in a cell managed by each network device 1203 . The number of relay terminals 1202 is generally multiple, and one or more relay terminals 1202 may be distributed in a cell managed by each network device 1203 . The network device 1203 is a device for providing wireless communication functions for the remote terminal 1201 and the relay terminal 1202 . The connection between the remote terminal 1201 and the relay terminal 1202 is established through a side link, and they can communicate with each other through a direct communication interface (such as a PC5 interface), and the relay terminal 1202 can broadcast network equipment to the remote terminal through the side link messages, thereby realizing network relay. The network device 1203 and the relay terminal 1202 communicate with each other through a certain air technology, such as a Uu interface.

The sidelink information is the information of the network device forwarded by the second terminal, or the information generated by the second terminal. For example, the lateral information includes configuration information of the network device, and the network device sends the configuration information to the second terminal in a broadcast manner. Alternatively, the side travel information is generated by the second terminal according to a preset rule. Optionally, the sidelink information includes one or more of the above-mentioned first configuration information, second configuration information, third configuration information, and second signal quality threshold.

Step 1104: the first terminal determines whether to request repeated transmission of the message 3 from the network device according to the lateral information.

When the sidelink information includes the first configuration information, the first terminal can determine whether to request repeated transmission of the message 3 to the network device according to the first signal quality threshold in the first configuration information.

When the sidelink information includes the second configuration information, the first terminal combines the acquired second signal quality threshold with the information used to determine the first signal quality threshold in the second configuration information, or the information obtained according to the sidelink information. The second signal quality threshold can determine the first signal quality threshold, so as to determine whether to request repeated transmission of the message 3 to the network device according to the first signal quality threshold.

When the sidelink information includes the third configuration information, the first terminal combines the obtained second signal quality threshold with the information for correcting the signal quality measurement result in the third configuration information, or the first terminal obtained according to the sidelink information. The second signal quality threshold can determine the corrected signal quality measurement result, and determine whether to request repeated transmission of the message 3 to the network device in combination with the second signal quality threshold.

When the sidelink information only includes the second signal quality threshold, the first terminal can determine the first information quality threshold according to the acquired first signal quality threshold or the information used to determine the first signal quality threshold, so that the first terminal can determine the first signal quality threshold according to the first The signal quality threshold determines whether to request repeated transmission of message 3 from the network device. Or, the first terminal determines the corrected signal quality measurement result according to the obtained information for correcting the signal quality measurement result, and determines whether to request the network device to repeat the message 3 in combination with the second signal quality threshold in the sidelink information transmission.

It should be noted that, in the process of determining whether to request repeated transmission of message 3 from the network device according to the side information, the first terminal will use the maximum transmission power of the first terminal, so as to determine whether to send the message 3 to the network in the most appropriate way. The device requests a repeated transmission of message 3.

To sum up, with the method provided in this embodiment, the first terminal can determine whether to request repeated transmission of message 3 in the random access process to the network device according to the sidelink information, thereby realizing enhanced uplink coverage of mobile communication. In this process, the difference between the maximum transmit power of the terminals can be considered, and the terminal with the lower maximum transmit power can more easily trigger the repeated transmission of the request Msg3, so as to achieve targeted enhancement of the uplink coverage of mobile communication.

The above-mentioned embodiments can be implemented independently or in combination freely.

Fig. 13 shows a block diagram of a random access device provided by an embodiment of the present application. As shown in Figure 13, the device 130 includes:

The determination module 1301 is configured to determine the signal quality measurement result on the serving cell.

The determining module 1301 is further configured to determine whether to request repeated transmission of message 3 in the random access process to the network device according to the signal quality measurement result and the maximum transmit power of the first terminal.

In an optional design, the determination module 1301 is used for:

According to the signal quality measurement result and the first signal quality threshold corresponding to the maximum transmit power of the first terminal, it is determined whether to request repeated transmission of message 3 to the network device.

In an optional design, device 130 also includes:

The sending module 1302 is configured to send a PUSCH retransmission request of message 3 to the network device when the signal quality measurement result is less than the first signal quality threshold.

In an optional design, according to the signal quality measurement result and the maximum transmit power, the method of determining whether to request repeated transmission of the message 3 to the network device is the first method, the first method is different from the second method, and the second method is When the second terminal determines whether to request repeated transmission of message 3 from the network device, the maximum transmission power of the first terminal is lower than that of the second terminal.

In an optional design, device 130 also includes:

The receiving module 1303 is configured to receive the first signal quality threshold configured by the network device.

In an optional design, device 130 also includes:

The receiving module 1303 is configured to receive the second signal quality threshold configured by the network device.

A determination module 1301, configured to determine a first signal quality threshold according to the first offset value and the second signal quality threshold,

Wherein, the maximum transmit power of the terminal device corresponding to the second signal quality threshold is greater than the maximum transmit power of the terminal device corresponding to the first signal quality threshold.

In an optional design, the determination module 1301 is used for:

Determine the first offset value according to the difference between the maximum transmit power of the first terminal and the reference maximum transmit power.

In an optional design, the determination module 1301 is used for:

The first offset value is determined by:

or,

The first offset value is equal to min{0, (P _PowerClass -P _Max )};

or,

The first offset value is equal to min{0, (P _PowerClass -P _{PowerClass_ref} )}.

Wherein, P _PowerClass is the maximum transmission power of the first terminal. P _Max is the maximum transmit power of the terminal supported by the cell broadcast by the network device. P _{PowerClass_ref} is the maximum transmit power corresponding to the power class of the reference terminal.

In an optional design, the receiving module 1303 is used for:

A first offset value configured by a network device is received.

In an optional design, the receiving module 1303 is used for:

A second offset value configured by the network device is received.

A determining module 1301, configured to determine a first offset value according to the maximum transmit power of the first terminal, the reference maximum transmit power, and the second offset value.

In an optional design, the determination module 1301 is used for:

The first offset value is determined by:

or,

The first offset value is equal to min{0, (P _PowerClass +P _offset -P _Max )};

or,

The first offset value is equal to min{0, (P _PowerClass +P _offset -P _{PowerClass_ref} )}.

Wherein, P _PowerClass is the maximum transmit power of the first terminal. P _Max is the maximum transmit power of the terminal supported by the cell broadcast by the network device. P _{PowerClass_ref} is the maximum transmit power corresponding to the power class of the reference terminal. P _offset is the second offset value.

In an optional design, device 130 also includes:

The determination module 1301 is configured to correct the signal quality measurement result according to the third offset value, and determine the corrected signal quality measurement result.

The determining module 1301 is further configured to determine a second signal quality threshold.

The sending module 1302 is configured to send the PUSCH retransmission request of message 3 to the network device when the corrected signal quality measurement result is less than or equal to the second signal quality threshold.

In an optional design, the determination module 1301 is used for:

Determine the third offset value according to the difference between the maximum transmit power of the first terminal and the reference maximum transmit power.

In an optional design, the determination module 1301 is used for:

Determine the third offset value by:

or,

The third offset value is equal to max{0, (P _Max -P _PowerClass )};

or,

The third offset value is equal to max{0, (P _{PowerClass_ref} -P _PowerClass )}.

In an optional design, device 130 also includes:

The receiving module 1303 is configured to receive a third offset value configured by the network device.

In an optional design, device 130 also includes:

The receiving module 1303 is configured to receive a fourth offset value configured by the network device.

A determining module 1301, configured to determine a third offset value according to the maximum transmit power of the first terminal, the reference maximum transmit power, and a fourth offset value.

In an optional design, the determination module 1301 is used for:

Determine the third offset value by:

or,

The third offset value is equal to max{0, (P _{PowerClass_ref} - (P _PowerClass +P _offset ))}.

Wherein, P _PowerClass is the maximum transmission power of the first terminal. P _Max is the maximum transmit power of the terminal supported by the cell broadcast by the network device. P _{PowerClass_ref} is the maximum transmit power corresponding to the power class of the reference terminal. P _offset is the fourth offset value.

In an optional design, the signal quality measurement results include any of the following:

Cell-level RSRP measurement results.

The RSRP measurement result on the target SSB. The target SSB is the SSB with the best measurement result or the SSB with the measurement result greater than the measurement threshold.

In an optional design, the power level of the first terminal does not include one of the following:

1, 1.5, 2, 3 and 5.

In an optional design, the maximum transmission power of the first terminal does not include any of the following:

31, 29, 26, 23 and 20.

In an optional design, the maximum transmit power of the first terminal is less than 20 dBm.

Fig. 14 shows a block diagram of a random access device provided by an embodiment of the present application. As shown in Figure 14, the device 140 includes:

The receiving module 1401 is configured to receive the repeated transmission request of message 3 in the random access procedure sent by the first terminal.

Wherein, the repeated transmission request of message 3 is determined by the first terminal according to the signal quality measurement result on the serving cell and the maximum transmit power of the first terminal.

In an optional design, the request for repeated transmission of message 3 is determined by the first terminal according to the signal quality measurement result and the first signal quality threshold corresponding to the maximum transmit power of the first terminal.

In an optional design, the first terminal determines, according to the signal quality measurement result and the maximum transmission power, that the determination method for requesting repeated transmission of the message 3 to the network device is the first method, and the first method is different from the second method, and the second method The manner is the manner in which the second terminal determines to request repeated transmission of the message 3 from the network device, and the maximum transmit power of the first terminal is lower than that of the second terminal.

In an optional design, device 140 also includes:

A sending module 1402, configured to configure a first signal quality threshold for the first terminal;

or.

The sending module 1402 is further configured to configure a second signal quality threshold and information for determining the first offset value for the first terminal;

or,

The sending module 1402 is further configured to configure the second signal quality threshold and the first offset value for the first terminal.

Wherein, the first offset value and the second signal quality threshold are used to determine the first signal quality threshold, and the maximum transmit power of the terminal device corresponding to the second signal quality threshold is greater than the maximum transmit power of the terminal device corresponding to the first signal quality threshold.

In an optional design, the sending module 1402 is used for:

Configure the first signal quality threshold for the terminal according to the first correspondence.

Wherein, the first corresponding relationship includes a corresponding relationship between different power levels and different signal quality thresholds, and the first corresponding relationship includes a corresponding relationship between the first terminal and the first signal quality threshold.

In an optional design, the sending module 1402 is used for:

Configure the second signal quality threshold for terminals whose maximum transmission power is not lower than the reference power. For terminals whose maximum transmit power is lower than the reference power, configure the first signal quality threshold according to the first correspondence.

In an optional design, the information used to determine the first offset value includes at least one of the following information:

The maximum transmit power of the terminal supported by the cell;

In an optional design, the sending module 1402 is used for:

Configure the second signal quality threshold for terminals whose maximum transmission power is not lower than the reference power. For terminals whose maximum transmit power is lower than the reference power, configure the second signal quality threshold, and configure the first offset value according to the second correspondence relationship.

Wherein, the second corresponding relationship includes a corresponding relationship between different power levels and different first offset values, and the second corresponding relationship includes a corresponding relationship between the first terminal and the first offset value.

In an optional design, the sending module 1402 is used for:

Configure the second signal quality threshold for terminals whose maximum transmit power is equal to the reference power. For terminals whose maximum transmit power is not equal to the reference power, configure a second signal quality threshold, and configure a first offset value according to the second correspondence.

In an optional design, the repeated transmission request of message 3 is determined by the first terminal according to the corrected signal quality measurement result and the second signal quality threshold.

The corrected signal quality measurement result is determined by the first terminal correcting the signal quality measurement result according to the third offset value, and the maximum transmission power of the terminal device corresponding to the second signal quality threshold is greater than that corresponding to the first signal quality threshold. The maximum transmit power of the terminal equipment.

In an optional design, device 140 also includes:

A sending module 1402, configured to configure a second signal quality threshold and information for determining a third offset value for the first terminal;

or,

The sending module 1402 is further configured to configure a second signal quality threshold and a third offset value for the first terminal.

In an optional design, the information used to determine the third offset value includes at least one of the following information:

The maximum transmit power of the terminal supported by the cell;

In an optional design, the sending module 1402 is used for:

Configure the second signal quality threshold for terminals whose maximum transmission power is not lower than the reference power. For terminals whose maximum transmit power is lower than the reference power, configure a second signal quality threshold, and configure a third offset value according to a third correspondence.

Wherein, the third corresponding relationship includes a corresponding relationship between different power levels and different third offset values, and the third corresponding relationship includes a corresponding relationship between the first terminal and the third offset value.

In an optional design, the sending module 1402 is used for:

Configure the second signal quality threshold for terminals whose maximum transmission power is equal to the reference power. For terminals whose maximum transmit power is not equal to the reference power, configure a second signal quality threshold, and configure a third offset value according to a third correspondence.

Cell-level RSRP measurement results;

The RSRP measurement result on the target SSB, where the target SSB is the SSB with the best measurement result or the SSB with the measurement result greater than the measurement threshold.

In an alternative design, the reference power is equal to P _Max ;

or,

Reference power is equal to _{PPowerClass_ref} ;

or,

The reference power is equal to min(P _Max , P _{PowerClass_ref} ).

Wherein, P _Max is the maximum transmit power of the terminal supported by the cell broadcast by the network device. P _{PowerClass_ref} is the maximum transmit power corresponding to the power class of the reference terminal.

1, 1.5, 2, 3 and 5.

31, 29, 26, 23 and 20.

It should be noted that when the device provided by the above embodiment realizes its functions, it only uses the division of the above-mentioned functional modules as an example for illustration. In practical applications, the above-mentioned function allocation can be completed by different functional modules according to actual needs. That is, the content structure of the device is divided into different functional modules to complete all or part of the functions described above.

Regarding the apparatus in the foregoing embodiments, the specific manner in which each module executes operations has been described in detail in the embodiments related to the method, and will not be described in detail here.

FIG. 15 shows a schematic structural diagram of a communication device (terminal device or network device) provided by an exemplary embodiment of the present application. The communication device 150 includes: a processor 1501, a receiver 1502, a transmitter 1503, a memory 1504 and a bus 1505 .

The processor 1501 includes one or more processing cores, and the processor 1501 executes various functional applications and information processing by running software programs and modules.

The receiver 1502 and the transmitter 1503 can be implemented as a communication component, which can be a communication chip.

The memory 1504 is connected to the processor 1501 through the bus 1505 .

The memory 1504 may be used to store at least one instruction, and the processor 1501 is used to execute the at least one instruction, so as to implement various steps in the foregoing method embodiments.

In addition, the memory 1504 can be realized by any type of volatile or non-volatile storage device or their combination, volatile or non-volatile storage device includes but not limited to: magnetic disk or optical disk, electrically erasable and programmable Read Only Memory (Erasable Programmable Read Only Memory, EEPROM), Erasable Programmable Read Only Memory (Erasable Programmable Read Only Memory, EPROM), Static Random Access Memory (SRAM), Read Only Memory (Read -Only Memory, ROM), magnetic memory, flash memory, programmable read-only memory (Programmable Read-Only Memory, PROM).

Wherein, when the communication device is implemented as a terminal device, the processor and the transceiver in the communication device involved in the embodiment of the present application may perform the steps performed by the terminal device in the method shown in any of the above method embodiments, where No longer.

Wherein, when the communication device is implemented as a network device, the processor and the transceiver in the communication device involved in the embodiment of the present application can perform the steps performed by the network device in any of the above-mentioned methods, which will not be repeated here. .

In an exemplary embodiment, a computer-readable storage medium is also provided, the computer-readable storage medium stores at least one instruction, at least one program, a code set or an instruction set, the at least one instruction, the At least one program, the code set or the instruction set is loaded and executed by the processor to implement the random access method performed by the communication device provided in the above method embodiments.

The embodiment of the present application also provides a chip, the chip includes a programmable logic circuit and/or program instructions, and when the chip runs on the communication device, it is used to implement the random access method performed by the communication device as described above .

The present application also provides a computer program product, which enables the communication device to execute the above random access method when the computer program product runs on the communication device.

Those skilled in the art should be aware that, in the foregoing one or more examples, the functions described in the embodiments of the present application may be implemented by hardware, software, firmware or any combination thereof. When implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.

The above are only exemplary embodiments of the application, and are not intended to limit the application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the application shall be included in the protection of the application. within range.

Claims

A random access method, characterized in that the method comprises:

The first terminal determines a signal quality measurement result on the serving cell;

The first terminal determines, according to the signal quality measurement result and the maximum transmit power of the first terminal, whether to request repeated transmission of message 3 in the random access process to the network device.
The method according to claim 1, wherein the first terminal determines whether to request the network device for the message 3 in the random access process according to the signal quality measurement result and the maximum transmit power of the first terminal of repeated transmissions, including:

The first terminal determines whether to request repeated transmission of the message 3 from the network device according to the signal quality measurement result and a first signal quality threshold corresponding to the maximum transmit power of the first terminal.
The method according to claim 2, wherein the first terminal determines whether to send a message to the network device according to the signal quality measurement result and the first signal quality threshold corresponding to the maximum transmission power of the first terminal. requesting repeated transmission of said message 3, comprising:

In a case where the signal quality measurement result is less than or equal to the first signal quality threshold, the first terminal sends a PUSCH repeat transmission request of the message 3 to the network device.
The method according to any one of claims 1 to 3, characterized in that,

The first terminal determines whether to request repeated transmission of the message 3 from the network device according to the signal quality measurement result and the maximum transmission power in a first way, and the first way is different from the first way Two ways, the second way is a way for the second terminal to determine whether to request the network device for repeated transmission of the message 3, and the maximum transmission power of the first terminal is lower than that of the second terminal.
The method according to claim 2 or 3, characterized in that the method further comprises:

The first terminal receives the first signal quality threshold configured by the network device.
The method according to claim 2 or 3, characterized in that the method further comprises:

The first terminal receives a second signal quality threshold configured by the network device;

determining, by the first terminal, the first signal quality threshold according to the first offset value and the second signal quality threshold,

Wherein, the maximum transmit power of the terminal device corresponding to the second signal quality threshold is greater than the maximum transmit power of the terminal device corresponding to the first signal quality threshold.
The method according to claim 6, further comprising:

The first terminal determines the first offset value according to a difference between the maximum transmit power of the first terminal and a reference maximum transmit power.
The method according to claim 7, wherein the first terminal determines the first offset value according to the difference between the maximum transmit power of the first terminal and a reference maximum transmit power, and is determined in the following manner :

The first offset value is equal to min{0, (P PowerClass -min (P PowerClass_ref , P Max ))};

or,

The first offset value is equal to min{0, (P PowerClass -P Max )};

or,

The first offset value is equal to min{0, (P PowerClass -P PowerClass_ref )};

Wherein, P PowerClass is the maximum transmit power of the first terminal; P Max is the maximum transmit power of the terminal supported by the cell broadcast by the network device; P PowerClass_ref is the maximum transmit power corresponding to the reference terminal power class.
The method according to claim 6, further comprising:

The first terminal receives the first offset value configured by the network device.
The method according to claim 6, further comprising:

The first terminal receives a second offset value configured by the network device;

The first terminal determines the first offset value according to the maximum transmit power of the first terminal, the reference maximum transmit power, and the second offset value.
The method according to claim 10, wherein the first terminal determines the first offset value according to the maximum transmit power of the first terminal, the reference maximum transmit power, and the second offset value , determined by:

The first offset value is equal to min{0, (P PowerClass +P offset -min(P PowerClass_ref , P Max ))};

or,

The first offset value is equal to min{0, (P PowerClass +P offset -P Max )};

or,

The first offset value is equal to min{0, (P PowerClass +P offset -P PowerClass_ref )};

Wherein, P PowerClass is the maximum transmit power of the first terminal; P Max is the maximum transmit power of the terminal supported by the cell broadcast by the network device; P PowerClass_ref is the maximum transmit power corresponding to the reference terminal power class; P offset is the Second offset value.
The method according to claim 2, wherein the first terminal determines whether to request the network device for the message 3 in the random access process according to the signal quality measurement result and the maximum transmission power of the first terminal of repeated transmissions, including:

The first terminal corrects the signal quality measurement result according to the third offset value, and determines the corrected signal quality measurement result;

The first terminal device determines a second signal quality threshold;

In a case where the corrected signal quality measurement result is less than or equal to the second signal quality threshold, the first terminal sends a PUSCH repeat transmission request of the message 3 to the network device;

Wherein, the maximum transmit power of the terminal device corresponding to the second signal quality threshold is greater than the maximum transmit power of the terminal device corresponding to the first signal quality threshold.
The method according to claim 12, characterized in that the method further comprises:

The first terminal determines the third offset value according to a difference between the maximum transmit power of the first terminal and a reference maximum transmit power.
The method according to claim 13, wherein the first terminal determines the third offset value according to the difference between the maximum transmit power of the first terminal and a reference maximum transmit power, and is determined in the following manner :

The third offset value is equal to max{0, (min(P PowerClass_ref , P Max )-P PowerClass )};

or,

The third offset value is equal to max{0, (P Max -P PowerClass )};

or,

The third offset value is equal to max{0, (P PowerClass_ref -P PowerClass )};

Wherein, P PowerClass is the maximum transmit power of the first terminal; P Max is the maximum transmit power of the terminal supported by the cell broadcast by the network device; P PowerClass_ref is the maximum transmit power corresponding to the reference terminal power class.
The method according to claim 12, characterized in that the method further comprises:

The first terminal receives the third offset value configured by the network device.
The method according to claim 12, characterized in that the method further comprises:

The first terminal receives a fourth offset value configured by the network device;

The first terminal determines the third offset value according to the maximum transmit power of the first terminal, the reference maximum transmit power, and the fourth offset value.
The method according to claim 16, wherein the first terminal determines the third offset value according to the maximum transmit power of the first terminal, the reference maximum transmit power, and the fourth offset value , determined by:

The third offset value is equal to max{0, (min(P PowerClass_ref , P Max )-(P PowerClass +P offset ))};

or,

The third offset value is equal to max{0, (P Max -(P PowerClass +P offset ))};

or,

The third offset value is equal to max{0, (P PowerClass_ref -(P PowerClass +P offset ))};

Wherein, P PowerClass is the maximum transmit power of the first terminal; P Max is the maximum transmit power of the terminal supported by the cell broadcast by the network device; P PowerClass_ref is the maximum transmit power corresponding to the reference terminal power class; P offset is the Fourth offset value.
The method according to any one of claims 1 to 17, wherein the signal quality measurement result includes any of the following:

Cell-level RSRP measurement results;

The RSRP measurement result on the target SSB, where the target SSB is the SSB with the best measurement result or the SSB with the measurement result greater than the measurement threshold.
The method according to any one of claims 1 to 17, characterized in that,

The power level of the first terminal does not include one of the following:

1, 1.5, 2, 3 and 5.
The method according to any one of claims 1 to 17, characterized in that,

The maximum transmit power of the first terminal does not include one of the following:

31, 29, 26, 23 and 20.
The method according to any one of claims 1 to 17, characterized in that,

The maximum transmission power of the first terminal is less than 20 dBm.
A random access method, characterized in that the method comprises:

The network device receives the repeated transmission request of message 3 in the random access process sent by the first terminal;

Wherein, the repeated transmission request of the message 3 is determined by the first terminal according to the signal quality measurement result on the serving cell and the maximum transmit power of the first terminal.
The method of claim 22, wherein,

The request for repeated transmission of the message 3 is determined by the first terminal according to the signal quality measurement result and the first signal quality threshold corresponding to the maximum transmit power of the first terminal.
A method according to claim 22 or 23, characterized in that,

The first terminal determines, according to the signal quality measurement result and the maximum transmit power, that the determination method for requesting the network device to repeat the transmission of the message 3 is a first method, and the first method is different from the second way, the second way is a way when the second terminal determines to request repeated transmission of the message 3 from the network device, and the maximum transmission power of the first terminal is lower than that of the second terminal.
The method according to claim 23, further comprising:

The network device configures the first signal quality threshold for the first terminal;

or;

configuring, by the network device, a second signal quality threshold and information for determining a first offset value for the first terminal;

or,

configuring, by the network device, the second signal quality threshold and the first offset value for the first terminal;

Wherein, the first offset value and the second signal quality threshold are used to determine the first signal quality threshold, and the maximum transmit power of the terminal device corresponding to the second signal quality threshold is greater than the first signal quality threshold The maximum transmit power of the terminal device corresponding to the threshold.
The method according to claim 25, wherein the network device configures the first signal quality threshold for the first terminal, comprising:

configuring, by the network device, the first signal quality threshold for the terminal according to the first correspondence;

Wherein, the first corresponding relationship includes a corresponding relationship between different power levels and different signal quality thresholds, and the first corresponding relationship includes a corresponding relationship between the first terminal and the first signal quality threshold.
The method according to claim 25, wherein the network device configures the first signal quality threshold for the first terminal, comprising:

The network device is a terminal whose maximum transmission power is not lower than a reference power, and configures the second signal quality threshold;

The network device is a terminal whose maximum transmit power is lower than the reference power, and configures the first signal quality threshold according to a first correspondence;

Wherein, the first corresponding relationship includes a corresponding relationship between different power levels and different signal quality thresholds, and the first corresponding relationship includes a corresponding relationship between the first terminal and the first signal quality threshold.
The method according to claim 25, wherein the information for determining the first offset value includes at least one of the following information:

The maximum transmit power of the terminal supported by the cell;

Refer to the maximum transmit power corresponding to the power level of the terminal.
The method according to claim 25, wherein the network device configures the second signal quality threshold and the first offset value for the first terminal, comprising:

The network device is a terminal whose maximum transmission power is not lower than a reference power, and configures the second signal quality threshold;

The network device configures the second signal quality threshold for a terminal whose maximum transmission power is lower than the reference power, and configures the first offset value according to the second correspondence;

Wherein, the second corresponding relationship includes a corresponding relationship between different power levels and different first offset values, and the second corresponding relationship includes a corresponding relationship between the first terminal and the first offset value relation.
The method according to claim 25, wherein the network device configures the second signal quality threshold and the first offset value for the first terminal, comprising:

The network device is a terminal whose maximum transmission power is equal to a reference power, and configures the second signal quality threshold;

The network device is a terminal whose maximum transmit power is not equal to the reference power, configures the second signal quality threshold, and configures the first offset value according to the second correspondence;

Wherein, the second corresponding relationship includes a corresponding relationship between different power levels and different first offset values, and the second corresponding relationship includes a corresponding relationship between the first terminal and the first offset value relation.
The method according to claim 25, wherein the information for determining the first offset value includes at least one of the following information:

The second offset value and the maximum transmit power of the terminal supported by the cell;

The second offset value and the maximum transmit power corresponding to the reference terminal power level;

The second offset value, the maximum transmit power of the terminal supported by the cell, and the maximum transmit power corresponding to the reference terminal power level.
The method of claim 23, wherein,

The request for repeated transmission of the message 3 is determined by the first terminal according to the corrected signal quality measurement result and the second signal quality threshold;

Wherein, the corrected signal quality measurement result is determined by correcting the signal quality measurement result by the first terminal according to the third offset value, and the maximum emission of the terminal device corresponding to the second signal quality threshold is The power is greater than the maximum transmit power of the terminal device corresponding to the first signal quality threshold.
The method of claim 32, further comprising:

configuring, by the network device, the second signal quality threshold and information for determining the third offset value for the first terminal;

or,

The network device configures the second signal quality threshold and the third offset value for the first terminal.
The method according to claim 33, wherein the information for determining the third offset value includes at least one of the following information:

The maximum transmit power of the terminal supported by the cell;

Refer to the maximum transmit power corresponding to the power level of the terminal.
The method according to claim 33, wherein the network device configures the second signal quality threshold and the third offset value for the first terminal, comprising:

The network device is a terminal whose maximum transmission power is not lower than a reference power, and configures the second signal quality threshold;

The network device configures the second signal quality threshold for a terminal whose maximum transmit power is lower than the reference power, and configures the third offset value according to a third correspondence;

Wherein, the third corresponding relationship includes a corresponding relationship between different power levels and different third offset values, and the third corresponding relationship includes a corresponding relationship between the first terminal and the third offset value relation.
The method according to claim 33, wherein the network device configures the second signal quality threshold and the third offset value for the first terminal, comprising:

The network device is a terminal whose maximum transmission power is equal to a reference power, and configures the second signal quality threshold;

The network device is a terminal whose maximum transmit power is not equal to the reference power, configures the second signal quality threshold, and configures the third offset value according to a third correspondence;

Wherein, the third corresponding relationship includes a corresponding relationship between different power levels and different third offset values, and the third corresponding relationship includes a corresponding relationship between the first terminal and the third offset value relation.
The method according to claim 33, wherein the information for determining the third offset value includes at least one of the following information:

The fourth offset value and the maximum transmit power of the terminal supported by the cell;

The fourth offset value and the maximum transmit power corresponding to the reference terminal power level;

The fourth offset value, the maximum transmit power of the terminal supported by the cell, and the maximum transmit power corresponding to the reference terminal power level.
The method according to any one of claims 22 to 37, wherein the signal quality measurement results include any of the following:

Cell-level RSRP measurement results;

The RSRP measurement result on the target SSB, where the target SSB is the SSB with the best measurement result or the SSB with the measurement result greater than the measurement threshold.
The method according to any one of claims 27, 29, 30, 35 and 36, wherein,

Said reference power is equal to P Max ;

or,

Said reference power is equal to P PowerClass_ref ;

or,

Said reference power is equal to min(P Max , P PowerClass_ref );

Wherein, P Max is the maximum transmit power of the terminal supported by the cell broadcast by the network device; P PowerClass_ref is the maximum transmit power corresponding to the reference terminal power class.
A method according to any one of claims 22 to 37, wherein,

The power level of the first terminal does not include one of the following:

1, 1.5, 2, 3 and 5.
A method according to any one of claims 22 to 37, wherein,

The maximum transmit power of the first terminal does not include one of the following:

31, 29, 26, 23 and 20.
A method according to any one of claims 22 to 37, wherein,

The maximum transmission power of the first terminal is less than 20 dBm.
A random access device, characterized in that the device includes:

A determining module, configured to determine a signal quality measurement result on the serving cell;

The determination module is further configured to determine whether to request repeated transmission of message 3 in the random access process to the network device according to the signal quality measurement result and the maximum transmit power of the first terminal.
The device according to claim 43, wherein the determining module is configured to:

According to the signal quality measurement result and the first signal quality threshold corresponding to the maximum transmit power of the first terminal, determine whether to request repeated transmission of the message 3 from the network device.
The device according to claim 44, further comprising:

A sending module, configured to send the PUSCH retransmission request of the message 3 to the network device when the signal quality measurement result is less than or equal to the first signal quality threshold.
Apparatus according to any one of claims 43 to 45 wherein,

The method of determining whether to request repeated transmission of the message 3 from the network device according to the signal quality measurement result and the maximum transmission power is a first method, and the first method is different from the second method, The second way is a way for the second terminal to determine whether to request repeated transmission of the message 3 from the network device, and the maximum transmission power of the first terminal is lower than that of the second terminal.
The device according to claim 44 or 45, wherein the device further comprises:

A receiving module, configured to receive the first signal quality threshold configured by the network device.
The device according to claim 44 or 45, wherein the device further comprises:

a receiving module, configured to receive the second signal quality threshold configured by the network device;

a determining module, configured to determine the first signal quality threshold according to the first offset value and the second signal quality threshold,

Wherein, the maximum transmit power of the terminal device corresponding to the second signal quality threshold is greater than the maximum transmit power of the terminal device corresponding to the first signal quality threshold.
The device according to claim 48, wherein the determination module is configured to:

Determine the first offset value according to the difference between the maximum transmit power of the first terminal and a reference maximum transmit power.
The device according to claim 49, wherein the determining module is configured to:

The first offset value is determined as follows:

The first offset value is equal to min{0, (P PowerClass -min (P PowerClass_ref , P Max ))};

or,

The first offset value is equal to min{0, (P PowerClass -P Max )};

or,

The first offset value is equal to min{0, (P PowerClass -P PowerClass_ref )};

Wherein, P PowerClass is the maximum transmit power of the first terminal; P Max is the maximum transmit power of the terminal supported by the cell broadcast by the network device; P PowerClass_ref is the maximum transmit power corresponding to the reference terminal power class.
The device according to claim 48, wherein the receiving module is configured to:

Receive the first offset value configured by the network device.
The device according to claim 48, wherein the receiving module is configured to:

receiving a second offset value configured by the network device;

The determining module is configured to determine the first offset value according to the maximum transmit power of the first terminal, the reference maximum transmit power, and the second offset value.
The device according to claim 52, wherein the determination module is configured to:

The first offset value is determined as follows:

The first offset value is equal to min{0, (P PowerClass +P offset -min(P PowerClass_ref , P Max ))};

or,

The first offset value is equal to min{0, (P PowerClass +P offset -P Max )};

or,

The first offset value is equal to min{0, (P PowerClass +P offset -P PowerClass_ref )};

Wherein, P PowerClass is the maximum transmit power of the first terminal; P Max is the maximum transmit power of the terminal supported by the cell broadcast by the network device; P PowerClass_ref is the maximum transmit power corresponding to the reference terminal power class; P offset is the Second offset value.
The device according to claim 44, further comprising:

The determination module is configured to correct the signal quality measurement result according to the third offset value, and determine the corrected signal quality measurement result;

The determining module is also used to determine a second signal quality threshold;

A sending module, configured to send the PUSCH retransmission request of the message 3 to the network device when the corrected signal quality measurement result is less than or equal to the second signal quality threshold;

Wherein, the maximum transmit power of the terminal device corresponding to the second signal quality threshold is greater than the maximum transmit power of the terminal device corresponding to the first signal quality threshold.
The device according to claim 54, wherein the determining module is configured to:

Determine the third offset value according to the difference between the maximum transmit power of the first terminal and a reference maximum transmit power.
The device according to claim 55, wherein the determining module is configured to:

The third offset value is determined as follows:

The third offset value is equal to max{0, (min(P PowerClass_ref , P Max )-P PowerClass )};

or,

The third offset value is equal to max{0, (P Max -P PowerClass )};

or,

The third offset value is equal to max{0, (P PowerClass_ref -P PowerClass )};

Wherein, P PowerClass is the maximum transmit power of the first terminal; P Max is the maximum transmit power of the terminal supported by the cell broadcast by the network device; P PowerClass_ref is the maximum transmit power corresponding to the reference terminal power class.
The device according to claim 54, further comprising:

A receiving module, configured to receive the third offset value configured by the network device.
The device according to claim 54, further comprising:

a receiving module, configured to receive a fourth offset value configured by the network device;

The determining module is configured to determine the third offset value according to the maximum transmit power of the first terminal, the reference maximum transmit power, and the fourth offset value.
The device according to claim 58, wherein the determining module is configured to:

The third offset value is determined as follows:

The third offset value is equal to max{0, (min(P PowerClass_ref , P Max )-(P PowerClass +P offset ))};

or,

The third offset value is equal to max{0, (P Max -(P PowerClass +P offset ))};

or,

The third offset value is equal to max{0, (P PowerClass_ref -(P PowerClass +P offset ))};

Wherein, P PowerClass is the maximum transmit power of the first terminal; P Max is the maximum transmit power of the terminal supported by the cell broadcast by the network device; P PowerClass_ref is the maximum transmit power corresponding to the reference terminal power class; P offset is the Fourth offset value.
The device according to any one of claims 43 to 59, wherein the signal quality measurement result includes any of the following:

Cell-level RSRP measurement results;

The RSRP measurement result on the target SSB, where the target SSB is the SSB with the best measurement result or the SSB with the measurement result greater than the measurement threshold.
Apparatus according to any one of claims 43 to 59 wherein,

The power level of the first terminal does not include one of the following:

1, 1.5, 2, 3 and 5.
Apparatus according to any one of claims 43 to 59 wherein,

The maximum transmit power of the first terminal does not include one of the following:

31, 29, 26, 23 and 20.
Apparatus according to any one of claims 43 to 59 wherein,

The maximum transmission power of the first terminal is less than 20 dBm.
A random access device, characterized in that the device includes:

The receiving module is configured to receive the repeated transmission request of message 3 in the random access process sent by the first terminal;

Wherein, the repeated transmission request of the message 3 is determined by the first terminal according to the signal quality measurement result on the serving cell and the maximum transmit power of the first terminal.
The apparatus of claim 64 wherein,

The request for repeated transmission of the message 3 is determined by the first terminal according to the signal quality measurement result and the first signal quality threshold corresponding to the maximum transmit power of the first terminal.
Apparatus according to claim 64 or 65, characterized in that

The first terminal determines, according to the signal quality measurement result and the maximum transmission power, that the method for requesting repeated transmission of the message 3 from the network device is a first method, and the first method is different from the second method, The second manner is a manner in which the second terminal determines to request the network device for repeated transmission of the message 3, and the maximum transmission power of the first terminal is lower than that of the second terminal.
The device according to claim 65, further comprising:

a sending module, configured to configure the first signal quality threshold for the first terminal;

or;

The sending module is further configured to configure a second signal quality threshold and information for determining a first offset value for the first terminal;

or,

The sending module is further configured to configure the second signal quality threshold and the first offset value for the first terminal;

Wherein, the first offset value and the second signal quality threshold are used to determine the first signal quality threshold, and the maximum transmit power of the terminal device corresponding to the second signal quality threshold is greater than the first signal quality threshold The maximum transmit power of the terminal device corresponding to the threshold.
The device according to claim 67, wherein the sending module is configured to:

configuring the first signal quality threshold for the terminal according to the first correspondence;

Wherein, the first corresponding relationship includes a corresponding relationship between different power levels and different signal quality thresholds, and the first corresponding relationship includes a corresponding relationship between the first terminal and the first signal quality threshold.
The device according to claim 67, wherein the sending module is configured to:

Configuring the second signal quality threshold for a terminal whose maximum transmission power is not lower than a reference power;

Configuring the first signal quality threshold according to a first correspondence for a terminal whose maximum transmission power is lower than the reference power;

Wherein, the first corresponding relationship includes a corresponding relationship between different power levels and different signal quality thresholds, and the first corresponding relationship includes a corresponding relationship between the first terminal and the first signal quality threshold.
The device according to claim 67, wherein the information for determining the first offset value includes at least one of the following information:

The maximum transmit power of the terminal supported by the cell;

Refer to the maximum transmit power corresponding to the power level of the terminal.
The device according to claim 67, wherein the sending module is configured to:

Configuring the second signal quality threshold for a terminal whose maximum transmission power is not lower than a reference power;

configuring the second signal quality threshold for a terminal whose maximum transmit power is lower than the reference power, and configuring the first offset value according to a second correspondence;

Wherein, the second corresponding relationship includes a corresponding relationship between different power levels and different first offset values, and the second corresponding relationship includes a corresponding relationship between the first terminal and the first offset value relation.
The device according to claim 67, wherein the sending module is configured to:

Configuring the second signal quality threshold for a terminal whose maximum transmission power is equal to a reference power;

configuring the second signal quality threshold for a terminal whose maximum transmit power is not equal to the reference power, and configuring the first offset value according to a second correspondence;

Wherein, the second corresponding relationship includes a corresponding relationship between different power levels and different first offset values, and the second corresponding relationship includes a corresponding relationship between the first terminal and the first offset value relation.
The device according to claim 67, wherein the information for determining the first offset value includes at least one of the following information:

The second offset value and the maximum transmit power of the terminal supported by the cell;

The second offset value and the maximum transmit power corresponding to the reference terminal power level;

The second offset value, the maximum transmit power of the terminal supported by the cell, and the maximum transmit power corresponding to the reference terminal power level.
The apparatus of claim 65 wherein,

The request for repeated transmission of the message 3 is determined by the first terminal according to the corrected signal quality measurement result and the second signal quality threshold;

Wherein, the corrected signal quality measurement result is determined by correcting the signal quality measurement result by the first terminal according to the third offset value, and the maximum emission of the terminal device corresponding to the second signal quality threshold is The power is greater than the maximum transmit power of the terminal device corresponding to the first signal quality threshold.
The device of claim 74, further comprising:

A sending module, configured to configure the second signal quality threshold and information for determining the third offset value for the first terminal;

or,

The sending module is further configured to configure the second signal quality threshold and the third offset value for the first terminal.
The device according to claim 75, wherein the information for determining the third offset value includes at least one of the following information:

The maximum transmit power of the terminal supported by the cell;

Refer to the maximum transmit power corresponding to the power level of the terminal.
The device according to claim 75, wherein the sending module is configured to:

configuring the second signal quality threshold for a terminal whose maximum transmission power is not lower than a reference power;

configuring the second signal quality threshold for a terminal whose maximum transmit power is lower than the reference power, and configuring the third offset value according to a third correspondence;

Wherein, the third corresponding relationship includes a corresponding relationship between different power levels and different third offset values, and the third corresponding relationship includes a corresponding relationship between the first terminal and the third offset value relation.
The device according to claim 75, wherein the sending module is configured to:

Configuring the second signal quality threshold for a terminal whose maximum transmission power is equal to a reference power;

configuring the second signal quality threshold for a terminal whose maximum transmit power is not equal to the reference power, and configuring the third offset value according to a third correspondence;

Wherein, the third corresponding relationship includes a corresponding relationship between different power levels and different third offset values, and the third corresponding relationship includes a corresponding relationship between the first terminal and the third offset value relation.
The device according to claim 75, wherein the information for determining the third offset value includes at least one of the following information:

The fourth offset value and the maximum transmit power of the terminal supported by the cell;

The fourth offset value and the maximum transmit power corresponding to the reference terminal power level;

The fourth offset value, the maximum transmit power of the terminal supported by the cell, and the maximum transmit power corresponding to the reference terminal power level.
The device according to any one of claims 64 to 79, wherein the signal quality measurement result includes any of the following:

Cell-level RSRP measurement results;

The RSRP measurement result on the target SSB, where the target SSB is the SSB with the best measurement result or the SSB with the measurement result greater than the measurement threshold.
Apparatus according to any one of claims 69, 71, 72, 77 and 78, wherein,

Said reference power is equal to P Max ;

or,

Said reference power is equal to P PowerClass_ref ;

or,

Said reference power is equal to min(P Max , P PowerClass_ref );

Wherein, P Max is the maximum transmit power of the terminal supported by the cell broadcast by the network device; P PowerClass_ref is the maximum transmit power corresponding to the reference terminal power class.
Apparatus according to any one of claims 64 to 79 wherein,

The power level of the first terminal does not include one of the following:

1, 1.5, 2, 3 and 5.
Apparatus according to any one of claims 64 to 79 wherein,

The maximum transmit power of the first terminal does not include one of the following:

31, 29, 26, 23 and 20.
Apparatus according to any one of claims 64 to 79 wherein,

The maximum transmission power of the first terminal is less than 20 dBm.
A terminal, characterized in that the terminal includes:

processor;

a transceiver connected to the processor;

memory for storing executable instructions of the processor;

Wherein, the processor is configured to load and execute the executable instructions to implement the random access method according to any one of claims 1-21.
A network device, characterized in that the network device includes:

processor;

a transceiver connected to the processor;

memory for storing executable instructions of the processor;

Wherein, the processor is configured to load and execute the executable instructions to implement the random access method according to any one of claims 22 to 42.
A computer-readable storage medium, characterized in that executable instructions are stored in the readable storage medium, and the executable instructions are loaded and executed by a processor to implement the method described in any one of claims 1 to 42 random access method.
A chip, characterized in that the chip includes a programmable logic circuit or program, and the chip is used to implement the random access method according to any one of claims 1 to 42.