WO2023004756A1 - Procédé et appareil d'accès aléatoire, dispositif, et support de stockage - Google Patents

Procédé et appareil d'accès aléatoire, dispositif, et support de stockage Download PDF

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Publication number
WO2023004756A1
WO2023004756A1 PCT/CN2021/109620 CN2021109620W WO2023004756A1 WO 2023004756 A1 WO2023004756 A1 WO 2023004756A1 CN 2021109620 W CN2021109620 W CN 2021109620W WO 2023004756 A1 WO2023004756 A1 WO 2023004756A1
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WIPO (PCT)
Prior art keywords
terminal
signal quality
offset value
power
maximum transmit
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PCT/CN2021/109620
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English (en)
Chinese (zh)
Inventor
胡奕
李海涛
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Oppo广东移动通信有限公司
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Application filed by Oppo广东移动通信有限公司 filed Critical Oppo广东移动通信有限公司
Priority to PCT/CN2021/109620 priority Critical patent/WO2023004756A1/fr
Priority to CN202180098034.7A priority patent/CN117280836A/zh
Publication of WO2023004756A1 publication Critical patent/WO2023004756A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access

Definitions

  • the present application relates to the field of mobile communication, in particular to a random access method, device, equipment and storage medium.
  • 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.
  • 5G 5th Generation Mobile Communication Technology
  • R17 Release17
  • PUSCH Physical Uplink Shared Channel
  • PUCCH Physical Uplink Control Channel
  • uplink coverage can be enhanced by using a repeated transmission mechanism.
  • the present application provides a random access method, device, equipment and storage medium.
  • the technical scheme is as follows.
  • a random access 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.
  • a random access method comprising:
  • the network device receives the repeated transmission request of message 3 in the random access process sent by the first terminal;
  • 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.
  • a random access 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.
  • a random access 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;
  • 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.
  • a 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.
  • a 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.
  • a computer-readable storage medium 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.
  • a computer program product 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.
  • 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 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.
  • 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. 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.
  • 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.”
  • 5G 5th Generation Partnership Project
  • eMBB Enhanced Mobile Broadband
  • URLLC Ultra Reliable Low Latency Communications
  • mMTC massive Machine Type of Communication
  • New air interface (New Radio, NR) can be deployed independently.
  • 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.
  • RRC_INACTIVE RRC_INACTIVE
  • RRC_ACTIVE RRC active
  • 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.
  • CN Core Network
  • AS terminal access stratum
  • 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.
  • 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.
  • Radio access network Random Access Network
  • NR introduces low-capability (Reduced Capability, RedCap) devices (low-power terminals).
  • RedCap devices low-capability devices (Reduced Capability, RedCap) devices (low-power terminals).
  • 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 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.
  • energy saving is a very important technical indicator, especially for equipment such as industrial wireless sensors.
  • the terminal switches from the RRC_IDLE state to the RRC_CONNECTED state.
  • ⁇ Cell switching The terminal needs to establish uplink synchronization with a new cell.
  • the downlink (DownLink, DL) data arrives, and the UL is in an out-of-sync state at this time.
  • 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).
  • the UE transitions from the RRC_INACTIVE state to the RRC_CONNECTED state
  • 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:
  • 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.
  • PRACH Physical Random Access Channel
  • the network device sends a random access response (Random Access Response, RAR) to the terminal device.
  • RAR Random Access Response
  • RA-RNTI Random Access Radio Network Temporary Identifier
  • RA-RNTI 1+s_id+14 ⁇ t_id+14 ⁇ 80 ⁇ f_id+14 ⁇ 80 ⁇ 8 ⁇ ul_carrier_id;
  • 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.
  • the terminal device 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:
  • PDSCH Physical Downlink Shared Channel
  • the header (subheader) of the RAR contains a backoff indicator (Backoff Indicator, BI), which is used to indicate the backoff time for retransmitting Msg1;
  • BI Backoff Indicator
  • Random Access Preamble Identity Document 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;
  • TAG Timing Advance Group
  • Uplink scheduling (Uplink grant, UL grant): used to schedule the uplink resource indication of Msg3;
  • Temporary Cell Radio Network Temporary Identifier used to scramble the PDCCH (initial access) of Message 4 (Message 4, Msg4).
  • the terminal device 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.
  • RAR-RNTI Random Access Response Radio Network Temporary Identifier
  • 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.
  • RACH Random Access Channel
  • 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.
  • C-RNTI Cell Radio Network Temporary Identifier
  • 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.
  • C-RNTI Common Control Channel Service Data Unit
  • the coverage of the mobile communication network is one of the main network performances concerned by operators.
  • 5G works in a higher frequency band.
  • the working frequency band is 3.5GHz
  • 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.
  • 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.
  • 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.
  • TDD Time Division Duplexing
  • FDD Frequency Division Duplexing
  • 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.
  • UE 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.
  • 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.
  • 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.
  • the names of devices with access network device functions may be different.
  • they are called gNodeB or gNB.
  • the name "access network equipment” may change.
  • access network devices 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.
  • a communication relationship may be established between the terminal device 10 and the core network device 30 through the access network device 20 .
  • 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.
  • EUTRAN Evolved Universal Terrestrial Radio Access Network, Evolved Universal Terrestrial Radio Network
  • eNodeBs in EUTRAN
  • 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.
  • 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.
  • AMF Access and Mobility Management Function, access and mobility management function
  • UPF User Plane Function, user plane function
  • SMF Session Management Function, session management function
  • the access network device 20 and the core network device 30 may be collectively referred to as network devices.
  • 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.
  • the signal quality measurement result refers to Reference Signal Received Power (Reference Signal Receiving Power, RSRP).
  • the first terminal is a low-power terminal.
  • Table 1 shows the correspondence between the power level and the maximum transmit power of common terminals.
  • the maximum transmit power of common terminals is higher than that of low-power terminals.
  • the maximum transmit power is 31.
  • the maximum transmit power is 29.
  • the maximum transmit power is 26.
  • the maximum transmit power is 23.
  • the maximum transmit power is 20.
  • 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.
  • the first terminal is a terminal whose maximum transmit power is less than 20 dBm.
  • 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.
  • 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.
  • 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.
  • the maximum transmission power of the first terminal is lower than that of the second terminal.
  • the first terminal is a low-power terminal
  • 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
  • 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 .
  • 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.
  • the first terminal acquires a signal quality measurement result on the serving cell.
  • 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.
  • 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
  • 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.
  • 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.
  • 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.
  • the corrected signal quality measurement result determined by the first terminal the signal quality measurement result (for example, RSRP_measured) ⁇ the third offset value.
  • the first terminal sends a PUSCH retransmission request of message 3 to the network device.
  • the first terminal can determine the first signal quality threshold according to at least one of the following manners:
  • 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.
  • the network device will also configure the second signal quality threshold, and send the configuration information in the form of broadcast.
  • 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.
  • 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.
  • 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.
  • the first signal quality threshold determined by the first terminal the second signal quality threshold ⁇ the first offset value.
  • the first terminal can determine the first offset value in at least one of the following manners:
  • the reference maximum transmit power is determined by the first terminal according to information configured by the network device and/or predefined information.
  • 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 )) ⁇ ;
  • the first offset value is equal to min ⁇ 0, (P PowerClass -P Max ) ⁇ ;
  • the first offset value is equal to min ⁇ 0, (P PowerClass -P PowerClass_ref ) ⁇ ;
  • 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.
  • 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.
  • 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.
  • the reference maximum transmit power is determined by the first terminal according to information configured by the network device and/or predefined information.
  • 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 +P offset -min(P PowerClass_ref , P Max )) ⁇ ;
  • the first offset value is equal to min ⁇ 0, (P PowerClass +P offset -P Max ) ⁇ ;
  • the first offset value is equal to min ⁇ 0, (P PowerClass +P offset -P PowerClass_ref ) ⁇ ;
  • 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.
  • the first terminal can determine the third offset value in the following manner:
  • the reference maximum transmit power is determined by the first terminal according to information configured by the network device and/or predefined information.
  • 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 ) ⁇ ;
  • the third offset value is equal to max ⁇ 0, (P Max -P PowerClass ) ⁇ ;
  • the third offset value is equal to max ⁇ 0, (P PowerClass_ref -P PowerClass ) ⁇ ;
  • 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.
  • 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.
  • 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.
  • 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 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 +P offset )) ⁇ ;
  • the third offset value is equal to max ⁇ 0, (P Max -(P PowerClass +P offset )) ⁇ ;
  • the third offset value is equal to max ⁇ 0, (P PowerClass_ref - (P PowerClass + P offset )) ⁇ ;
  • 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.
  • the foregoing signal quality measurement results include any of the following:
  • the target SSB is the SSB with the best measurement result or the SSB with the measurement result greater than the measurement threshold.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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 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.
  • the first terminal is a terminal whose maximum transmit power is less than 20 dBm.
  • a terminal with a maximum transmission power in the range of 10-14dBm is a low-power 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.
  • 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.
  • 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.
  • the first terminal is a low-power terminal
  • 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
  • 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.
  • the network device 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:
  • 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.
  • 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.
  • the network device configures information for the first terminal in at least one of the following ways:
  • 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.
  • 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.
  • the first terminal sends a PUSCH retransmission request of message 3 to the network device.
  • the network device configures information for the first terminal in at least one of the following ways:
  • the foregoing signal quality measurement results include any of the following:
  • the target SSB is the SSB with the best measurement result or the SSB with the measurement result greater than the measurement threshold.
  • 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.
  • 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 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.
  • 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.
  • 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.
  • the first terminal is a low-power terminal
  • 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
  • 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.
  • the first terminal is a terminal with a power class other than 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.
  • the first terminal is a terminal whose maximum transmit power is less than 20 dBm.
  • the manner in which the network device configures the first configuration information for the first terminal includes at least one of the following:
  • the network device can configure the same first signal quality threshold for them.
  • the network device may also configure different first signal quality thresholds corresponding to power levels for low-power terminals of different power levels.
  • the first signal quality thresholds corresponding to low-power terminals of different power levels are the same or different.
  • Table 2 shows the correspondence between the power level of the terminal and the signal quality threshold.
  • each power level corresponds to a signal quality threshold.
  • 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.
  • the network device configures the first signal quality threshold for it.
  • the first signal quality thresholds configured by the network device are the same.
  • the network device can configure the first signal quality threshold for the terminal according to the first correspondence relationship.
  • the first corresponding relationship includes the corresponding relationship between different power levels (or maximum transmit power) and different signal quality thresholds.
  • 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.
  • 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.
  • 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.
  • the network device configures the second signal quality threshold for terminals whose maximum transmit power is not lower than the reference power.
  • 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.
  • the first corresponding relationship includes the corresponding relationship between different power levels (or maximum transmit power) and different signal quality thresholds.
  • the terminal 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.
  • 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.
  • Table 3 shows the correspondence between the power level of the terminal and the signal quality threshold.
  • each power level corresponds to a signal quality threshold.
  • 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).
  • 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.
  • 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.
  • the above reference power is equal to P Max ;
  • Reference power is equal to PPowerClass_ref ;
  • Reference power is equal to min(P Max , P PowerClass_ref );
  • 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.
  • the first terminal acquires a signal quality measurement result on the serving cell.
  • 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 terminal 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.
  • the first terminal 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.
  • 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.
  • the foregoing signal quality measurement results include any of the following:
  • the target SSB is the SSB with the best measurement result or the SSB with the measurement result greater than the measurement threshold.
  • 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.
  • 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 .
  • 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.
  • 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.
  • 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.
  • step 502 can be implemented independently as an information configuration method on the network device side.
  • step 506 can be independently implemented as a random access method on the first terminal side.
  • 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.
  • 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 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.
  • the problem of waste of resources caused by inaccurate measurement results of evaluating signal quality can be avoided.
  • 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.
  • 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.
  • 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.
  • the first terminal is a low-power terminal
  • 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
  • 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.
  • the first terminal is a terminal with a power class other than 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.
  • the first terminal is a terminal whose maximum transmit power is less than 20 dBm.
  • the manner in which the network device configures the second configuration information for the first terminal includes at least one of the following:
  • 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.
  • the information used to determine the first offset value includes at least one of the following information:
  • the maximum transmission power corresponding to the power level of the reference terminal is configured or predefined by the network.
  • 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.
  • 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 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.
  • the second corresponding relationship includes a corresponding relationship between different power levels (or maximum transmit power) and different first offset values.
  • the terminal 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 .
  • the first offset value configured by the network device for the power level of the terminal will be received.
  • 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.
  • 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.
  • the second corresponding relationship includes a corresponding relationship between different power levels (or maximum transmit power) and different first offset values.
  • the terminal 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 .
  • the first offset value configured by the network device for the power level of the terminal will be received.
  • 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.
  • Table 4 shows the correspondence between the power level of the terminal and the first offset value.
  • 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.
  • 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.
  • the reference power is equal to P Max ;
  • Reference power is equal to PPowerClass_ref ;
  • Reference power is equal to min(P Max , P PowerClass_ref );
  • 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.
  • the information used to determine the first offset value includes at least one of the following information:
  • 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 are 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.
  • the maximum transmission power corresponding to the power level of the reference terminal is configured or predefined by the network.
  • 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:
  • 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.
  • 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 )) ⁇ ;
  • the first offset value is equal to min ⁇ 0, (P PowerClass -P Max ) ⁇ ;
  • the first offset value is equal to min ⁇ 0, (P PowerClass -P PowerClass_ref ) ⁇ ;
  • P PowerClass is the maximum transmission power of the first terminal.
  • the first terminal 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.
  • 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.
  • 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 +P offset -min(P PowerClass_ref , P Max )) ⁇ ;
  • the first offset value is equal to min ⁇ 0, (P PowerClass +P offset -P Max ) ⁇ ;
  • the first offset value is equal to min ⁇ 0, (P PowerClass +P offset -P PowerClass_ref ) ⁇ ;
  • 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.
  • the first terminal acquires a signal quality measurement result on the serving cell.
  • the first terminal sends a PUSCH repeat transmission request of message 3 to the network device.
  • 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.
  • the foregoing signal quality measurement results include any of the following:
  • the target SSB is the SSB with the best measurement result or the SSB with the measurement result greater than the measurement threshold.
  • 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.
  • 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 .
  • 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.
  • 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 .
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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 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.
  • the problem of waste of resources caused by inaccurate measurement results of evaluating signal quality can be avoided.
  • the problem of limited uplink coverage caused by inaccurate evaluation signal quality measurement results can be avoided.
  • 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.
  • 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.
  • the first terminal is a low-power terminal
  • 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
  • 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 .
  • the first terminal is a terminal with a power class other than 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.
  • the first terminal is a terminal whose maximum transmit power is less than 20 dBm.
  • the manner in which the network device configures the third configuration information for the first terminal includes at least one of the following:
  • the information used to determine the third offset value includes at least one of the following information:
  • the maximum transmission power corresponding to the power level of the reference terminal is configured or predefined by the network.
  • 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.
  • the third corresponding relationship includes a corresponding relationship between different power levels (or maximum transmit power) and different third offset values.
  • a terminal such as a second terminal
  • the terminal will receive the second signal quality threshold configured by the network device.
  • the terminal will use the second method to determine the repeated transmission request of message 3 .
  • a third offset value configured by the network device for the power level of the terminal will be received.
  • 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.
  • 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.
  • the third corresponding relationship includes a corresponding relationship between different power levels (or maximum transmit power) and different third offset values.
  • 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.
  • the terminal will use the second method to determine the repeated transmission request of message 3 .
  • a third offset value configured by the network device for the power level of the terminal will be received.
  • 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.
  • Table 5 shows the correspondence between the power level of the terminal and the third offset value.
  • 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.
  • 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.
  • the above reference power is equal to P Max ;
  • Reference power is equal to PPowerClass_ref ;
  • Reference power is equal to min(P Max , P PowerClass_ref );
  • 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.
  • the information used to determine the third offset value includes at least one of the following information:
  • 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 are 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.
  • the maximum transmission power corresponding to the power level of the reference terminal is configured or predefined by the network.
  • 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:
  • 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.
  • 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 ) ⁇ ;
  • the third offset value is equal to max ⁇ 0, (P Max -P PowerClass ) ⁇ ;
  • the third offset value is equal to max ⁇ 0, (P PowerClass_ref -P PowerClass ) ⁇ ;
  • P PowerClass is the maximum transmission power of the first terminal.
  • the first terminal 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.
  • 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.
  • 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 +P offset )) ⁇ ;
  • the third offset value is equal to max ⁇ 0, (P Max -(P PowerClass +P offset )) ⁇ ;
  • the third offset value is equal to max ⁇ 0, (P PowerClass_ref - (P PowerClass + P offset )) ⁇ ;
  • 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.
  • 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.
  • the first terminal sends a PUSCH retransmission request of message 3 to the network device.
  • 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.
  • the foregoing signal quality measurement results include any of the following:
  • the target SSB is the SSB with the best measurement result or the SSB with the measurement result greater than the measurement threshold.
  • 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.
  • 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 .
  • the low-power terminal 1001 determines to request repeated transmission of Msg3.
  • 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.
  • the common terminal uses the initial signal quality measurement value to determine whether to deny the repeated transmission of the request Msg3.
  • 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.
  • 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.
  • 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 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.
  • the problem of waste of resources caused by inaccurate measurement results of evaluating signal quality can be avoided.
  • the problem of limited uplink coverage caused by inaccurate evaluation signal quality measurement results can be avoided.
  • 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.
  • 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.
  • the first terminal is a terminal with a power class other than 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.
  • the first terminal is a terminal whose maximum transmit power is less than 20 dBm.
  • 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.
  • 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.
  • 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.
  • the side travel information is generated by the second terminal according to a preset rule.
  • 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.
  • 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.
  • the first terminal 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.
  • the first terminal 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.
  • 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.
  • the first terminal 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.
  • 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.
  • 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 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.
  • the problem of waste of resources caused by inaccurate measurement results of evaluating signal quality can be avoided.
  • the problem of limited uplink coverage caused by inaccurate evaluation signal quality measurement results can be avoided.
  • Fig. 13 shows a block diagram of a random access device provided by an embodiment of the present application.
  • 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.
  • the determination module 1301 is used for:
  • 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.
  • 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.
  • 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.
  • device 130 also includes:
  • the receiving module 1303 is configured to receive the first signal quality threshold configured by the network device.
  • 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
  • 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 determination module 1301 is used for:
  • the determination module 1301 is used for:
  • the first offset value is determined by:
  • the first offset value is equal to min ⁇ 0, (P PowerClass - min(P PowerClass_ref , P Max )) ⁇ ;
  • the first offset value is equal to min ⁇ 0, (P PowerClass -P Max ) ⁇ ;
  • the first offset value is equal to min ⁇ 0, (P PowerClass -P PowerClass_ref ) ⁇ .
  • 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.
  • the receiving module 1303 is used for:
  • a first offset value configured by a network device is received.
  • 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.
  • the determination module 1301 is used for:
  • the first offset value is determined by:
  • the first offset value is equal to min ⁇ 0, (P PowerClass +P offset -min(P PowerClass_ref , P Max )) ⁇ ;
  • the first offset value is equal to min ⁇ 0, (P PowerClass +P offset -P Max ) ⁇ ;
  • the first offset value is equal to min ⁇ 0, (P PowerClass +P offset -P PowerClass_ref ) ⁇ .
  • 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.
  • 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.
  • 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 determination module 1301 is used for:
  • the determination module 1301 is used for:
  • the third offset value is equal to max ⁇ 0, (min(P PowerClass_ref , P Max ) ⁇ P PowerClass ) ⁇ ;
  • the third offset value is equal to max ⁇ 0, (P Max -P PowerClass ) ⁇ ;
  • the third offset value is equal to max ⁇ 0, (P PowerClass_ref -P PowerClass ) ⁇ .
  • 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.
  • device 130 also includes:
  • the receiving module 1303 is configured to receive a third offset value configured by the network device.
  • 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.
  • the determination module 1301 is used for:
  • the third offset value is equal to max ⁇ 0, (min(P PowerClass_ref , P Max )-(P PowerClass +P offset )) ⁇ ;
  • the third offset value is equal to max ⁇ 0, (P Max -(P PowerClass +P offset )) ⁇ ;
  • the third offset value is equal to max ⁇ 0, (P PowerClass_ref - (P PowerClass +P offset )) ⁇ .
  • 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.
  • the signal quality measurement results include any of the following:
  • the RSRP measurement result on the target SSB is the SSB with the best measurement result or the SSB with the measurement result greater than the measurement threshold.
  • the power level of the first terminal does not include one of the following:
  • the maximum transmission power of the first terminal does not include any of the following:
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • device 140 also includes:
  • a sending module 1402 configured to configure a first signal quality threshold for the first terminal
  • 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;
  • the sending module 1402 is further configured to configure the second signal quality threshold and the first offset value for the first terminal.
  • 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.
  • the sending module 1402 is used for:
  • 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 sending module 1402 is used for:
  • 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 information used to determine the first offset value includes at least one of the following information:
  • the sending module 1402 is used for:
  • 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.
  • the sending module 1402 is used for:
  • 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.
  • the information used to determine the first offset value includes at least one of the following information:
  • 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 are 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.
  • 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 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.
  • 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
  • the sending module 1402 is further configured to configure a second signal quality threshold and a third offset value for the first terminal.
  • the information used to determine the third offset value includes at least one of the following information:
  • the sending module 1402 is used for:
  • 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.
  • the sending module 1402 is used for:
  • 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.
  • the information used to determine the third offset value includes at least one of the following information:
  • 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 are 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.
  • the signal quality measurement results include any of the following:
  • 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 reference power is equal to P Max ;
  • Reference power is equal to PPowerClass_ref ;
  • the reference power is equal to min(P Max , P PowerClass_ref ).
  • 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.
  • the power level of the first terminal does not include one of the following:
  • the maximum transmission power of the first terminal does not include any of the following:
  • the maximum transmit power of the first terminal is less than 20 dBm.
  • 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.
  • 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.
  • 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).
  • EEPROM Electrically erasable and programmable Read Only Memory
  • EPROM Erasable Programmable Read Only Memory
  • SRAM Static Random Access Memory
  • PROM Programmable Read-Only Memory
  • 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.
  • 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. .
  • a 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.
  • the functions described in the embodiments of the present application may be implemented by hardware, software, firmware or any combination thereof.
  • 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.

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

La présente demande, qui relève du domaine des communications mobiles, concerne un procédé et un appareil d'accès aléatoire, un dispositif, et un support de stockage. Le procédé comprend : la détermination, par un premier terminal, d'un résultat de mesure de qualité de signal dans une cellule de desserte ; et le fait de déterminer, par le premier terminal selon le résultat de mesure de qualité de signal et une puissance émise maximale du premier terminal, s'il faut demander la transmission répétée d'un message 3 dans un processus d'accès aléatoire par un dispositif de réseau. Le premier terminal peut déterminer, selon le résultat de mesure de qualité de signal et la puissance émise maximale du premier terminal, s'il faut demander la transmission répétée du message 3 dans le processus d'accès aléatoire par le dispositif de réseau, de façon à mettre en œuvre une amélioration de couverture en liaison montante de la communication mobile. Dans un tel processus, la différence de la puissance émise maximale du terminal peut être prise en compte de sorte qu'il est plus aisé pour le terminal ayant la puissance émise maximale la plus faible de déclencher la demande de transmission répétée du message 3, ce qui permet de mettre en œuvre une amélioration ciblée de la couverture en liaison montante de la communication mobile.
PCT/CN2021/109620 2021-07-30 2021-07-30 Procédé et appareil d'accès aléatoire, dispositif, et support de stockage WO2023004756A1 (fr)

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CN202180098034.7A CN117280836A (zh) 2021-07-30 2021-07-30 随机接入方法、装置、设备及存储介质

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