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WO2020177135A1 - 功率控制方法及随机接入方法、装置、终端 - Google Patents

功率控制方法及随机接入方法、装置、终端 Download PDF

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Publication number
WO2020177135A1
WO2020177135A1 PCT/CN2019/077379 CN2019077379W WO2020177135A1 WO 2020177135 A1 WO2020177135 A1 WO 2020177135A1 CN 2019077379 W CN2019077379 W CN 2019077379W WO 2020177135 A1 WO2020177135 A1 WO 2020177135A1
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WO
WIPO (PCT)
Prior art keywords
message
power
preamble
random access
data channel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2019/077379
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English (en)
French (fr)
Inventor
徐伟杰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangdong Oppo Mobile Telecommunications Corp Ltd
Original Assignee
Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Guangdong Oppo Mobile Telecommunications Corp Ltd filed Critical Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority to CN201980005770.6A priority Critical patent/CN111919495A/zh
Priority to PCT/CN2019/077379 priority patent/WO2020177135A1/zh
Priority to EP19918416.9A priority patent/EP3920643B1/en
Publication of WO2020177135A1 publication Critical patent/WO2020177135A1/zh
Priority to US17/463,311 priority patent/US11979837B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/06—TPC algorithms
    • H04W52/14—Separate analysis of uplink or downlink
    • H04W52/146—Uplink power control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/06—TPC algorithms
    • H04W52/16—Deriving transmission power values from another channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/30—Transmission power control [TPC] using constraints in the total amount of available transmission power
    • H04W52/32—TPC of broadcast or control channels
    • H04W52/325—Power control of control or pilot channels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/30—Transmission power control [TPC] using constraints in the total amount of available transmission power
    • H04W52/36—Transmission power control [TPC] using constraints in the total amount of available transmission power with a discrete range or set of values, e.g. step size, ramping or offsets
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/30—Transmission power control [TPC] using constraints in the total amount of available transmission power
    • H04W52/36—Transmission power control [TPC] using constraints in the total amount of available transmission power with a discrete range or set of values, e.g. step size, ramping or offsets
    • H04W52/367—Power values between minimum and maximum limits, e.g. dynamic range
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/38—TPC being performed in particular situations
    • H04W52/50—TPC being performed in particular situations at the moment of starting communication in a multiple access environment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H04W74/0841—Random access procedures, e.g. with 4-step access with collision treatment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H04W74/0836—Random access procedures, e.g. with 4-step access with 2-step access

Definitions

  • the embodiments of the present application relate to the field of mobile communication technology, and specifically relate to a power control method, a random access method, device, and terminal.
  • the random access process uses a 4-step random access process.
  • the 4-step random access process in the LTE system is still used in the New Radio (NR) system.
  • NR New Radio
  • the 4-step random access process is more cumbersome and will bring greater time delay to the terminal access, so a 2-step random access process is proposed.
  • the power control and processing procedures of the 2-step random access procedure have yet to be defined.
  • the embodiments of the present application provide a power control method and a random access method, device, and terminal.
  • the terminal receives first configuration information sent by the network device, where the first configuration information is used to determine the power of the uplink data channel in the first message, where the first message includes a preamble and the uplink data channel.
  • the terminal After sending the first message to the network device, the terminal receives a second message sent by the network device, where the first message includes a preamble and an uplink data channel, and the second message includes a random access response message and conflict resolution information;
  • the terminal determines whether to fall back from the 2-step random access process to the 4-step random access process based on the second message.
  • the terminal After the terminal sends the first message to the network device, if it does not successfully receive the second message sent by the network device, it retransmits the first message to the network device;
  • the first message includes the preamble and uplink data Channel, the second message includes a random access response message and conflict resolution information;
  • the terminal starts from 2-step random access The process goes back to the 4-step random access process.
  • the receiving unit is configured to receive first configuration information sent by a network device, where the first configuration information is used to determine the power of an uplink data channel in a first message, where the first message includes a preamble and the uplink data channel.
  • the sending unit is used to send the first message to the network device
  • a receiving unit configured to receive a second message sent by the network device, where the first message includes a preamble and an uplink data channel, and the second message includes a random access response message and conflict resolution information;
  • the determining unit is configured to determine whether to fall back from the 2-step random access process to the 4-step random access process based on the second message.
  • the communication unit is configured to retransmit the first message to the network device if the second message sent by the network device is not successfully received after sending the first message to the network device; the first message includes the preamble Code and uplink data channel, the second message includes a random access response message and conflict resolution information;
  • the fallback unit is configured to: if the number of times that the communication unit sends the first message to the network device reaches the maximum number of transmissions, and the communication unit has not successfully received the second message sent by the network device, then The 2-step random access process falls back to the 4-step random access process.
  • the terminal provided in the embodiment of the present application includes a processor and a memory.
  • the memory is used to store a computer program
  • the processor is used to call and run the computer program stored in the memory to execute the above-mentioned power control method or random access method.
  • the chip provided in the embodiment of the present application is used to implement the aforementioned power control method or random access method.
  • the chip includes: a processor, configured to call and run a computer program from the memory, so that the device installed with the chip executes the above-mentioned power control method or random access method.
  • the computer-readable storage medium provided by the embodiment of the present application is used to store a computer program, and the computer program enables a computer to execute the above-mentioned power control method or random access method.
  • the computer program product provided by the embodiments of the present application includes computer program instructions, which cause a computer to execute the above-mentioned power control method or random access method.
  • the computer program provided in the embodiment of the present application when running on a computer, causes the computer to execute the above-mentioned power control method or random access method.
  • the terminal obtains the first configuration information from the network device, thereby determining the power of the uplink data channel in the first message based on the first configuration information, where the first message includes the preamble and the uplink data channel, That is, the first message is MsgA in the 2-step random access process.
  • the power configuration of the uplink data channel in the MsgA in the 2-step random access process is realized, thereby increasing the probability of the overall successful demodulation of MsgA.
  • a specific mechanism from the 2-step random access process back to 4-step random access is introduced, which is easy to implement, and thus is more compatible with various random access mechanisms.
  • FIG. 1 is a schematic diagram of a communication system architecture provided by an embodiment of the present application.
  • FIG. 3 is a schematic structural diagram of MAC RAR provided by an embodiment of the present application.
  • Fig. 4 is a flowchart of a 2-step random access process provided by an embodiment of the present application.
  • FIG. 5 is a schematic flowchart of a power control method according to an embodiment of the present application.
  • Fig. 6 is a schematic diagram of MsgA in an embodiment of the present application.
  • FIG. 7 is a first schematic flowchart of a random access method provided by an embodiment of this application.
  • FIG. 8 is a schematic diagram 2 of the flow of the random access method provided by an embodiment of this application.
  • FIG. 9 is a third schematic flowchart of a random access method provided by an embodiment of this application.
  • FIG. 10 is a schematic diagram of the structural composition of a power control device provided by an embodiment of the application.
  • FIG. 11 is a schematic diagram 1 of the structural composition of a random access device provided by an embodiment of this application.
  • FIG. 12 is a second schematic diagram of the structural composition of a random access device provided by an embodiment of this application.
  • FIG. 13 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • FIG. 14 is a schematic structural diagram of a chip of an embodiment of the present application.
  • FIG. 15 is a schematic block diagram of a communication system provided by an embodiment of the present application.
  • GSM Global System of Mobile Communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GSM Global System of Mobile Communication
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • UMTS Universal Mobile Telecommunication System
  • WiMAX Worldwide Interoperability for Microwave Access
  • the communication system 100 applied in the embodiment of the present application is shown in FIG. 1.
  • the communication system 100 may include a network device 110, and the network device 110 may be a device that communicates with a terminal 120 (or called a communication terminal or a terminal).
  • the network device 110 may provide communication coverage for a specific geographic area, and may communicate with terminals located in the coverage area.
  • the network device 110 may be a base station (Base Transceiver Station, BTS) in a GSM system or a CDMA system, a base station (NodeB, NB) in a WCDMA system, or an evolved base station in an LTE system (Evolutional Node B, eNB or eNodeB), or the wireless controller in the Cloud Radio Access Network (CRAN), or the network equipment can be a mobile switching center, a relay station, an access point, a vehicle-mounted device, Wearable devices, hubs, switches, bridges, routers, network-side devices in 5G networks, or network devices in the future evolution of the Public Land Mobile Network (PLMN), etc.
  • BTS Base Transceiver Station
  • NodeB, NB base station
  • LTE Long Term Evolutional Node B
  • eNB evolved base station
  • CRAN Cloud Radio Access Network
  • the network equipment can be a mobile switching center, a relay station, an access point, a vehicle-mounted device, Wearable devices, hubs, switches
  • the communication system 100 also includes at least one terminal 120 located within the coverage area of the network device 110.
  • the "terminal” used here includes, but is not limited to, connection via wired lines, such as public switched telephone networks (PSTN), digital subscriber lines (Digital Subscriber Line, DSL), digital cables, and direct cable connections; And/or another data connection/network; and/or via a wireless interface, such as for cellular networks, wireless local area networks (WLAN), digital TV networks such as DVB-H networks, satellite networks, AM-FM Broadcast transmitter; and/or another terminal's device configured to receive/send communication signals; and/or Internet of Things (IoT) equipment.
  • a terminal set to communicate through a wireless interface may be referred to as a "wireless communication terminal", a “wireless terminal” or a “mobile terminal”.
  • mobile terminals include, but are not limited to, satellites or cellular phones; Personal Communications System (PCS) terminals that can combine cellular radio phones with data processing, fax, and data communication capabilities; can include radio phones, pagers, Internet/intranet PDA with internet access, web browser, memo pad, calendar, and/or Global Positioning System (GPS) receiver; and conventional laptop and/or palmtop receivers or others including radio phone transceivers Electronic device.
  • PCS Personal Communications System
  • GPS Global Positioning System
  • Terminal can refer to access terminal, user equipment (User Equipment, UE), user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication equipment, user agent or user Device.
  • the access terminal can be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, a personal digital processing (Personal Digital Assistant, PDA), with wireless communication Functional handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminals in 5G networks, or terminals in the future evolution of PLMN, etc.
  • SIP Session Initiation Protocol
  • WLL Wireless Local Loop
  • PDA Personal Digital Assistant
  • the terminals 120 may perform device-to-device (D2D) communication.
  • D2D device-to-device
  • the 5G system or 5G network may also be referred to as a New Radio (NR) system or NR network.
  • NR New Radio
  • FIG. 1 exemplarily shows one network device and two terminals.
  • the communication system 100 may include multiple network devices and the coverage of each network device may include other numbers of terminals. This embodiment of the present application There is no restriction on this.
  • the communication system 100 may also include other network entities such as a network controller and a mobility management entity, which are not limited in the embodiment of the present application.
  • network entities such as a network controller and a mobility management entity, which are not limited in the embodiment of the present application.
  • the devices with communication functions in the network/system in the embodiments of the present application may be referred to as communication devices.
  • the communication device may include a network device 110 and a terminal 120 with communication functions, and the network device 110 and the terminal 120 may be the specific devices described above, which will not be repeated here;
  • the device may also include other devices in the communication system 100, such as other network entities such as a network controller and a mobility management entity, which are not limited in the embodiment of the present application.
  • the wireless cellular communication network supports most mobile broadband (MBB, Mobile Broad Band) services and their enhanced services.
  • MBB Mobile Broad Band
  • the main service scenario of wireless cellular communication networks is to provide mobile terminals (such as handheld devices) with extensive coverage data services.
  • NR is the latest research on the 3rd Generation Partnership Project (3GPP, The3rd Generation Partnership Project) standard.
  • NR supports low-latency and high-reliability (URLLC, Ultra Reliability and Low Latency Communication) communications through wireless cellular networks.
  • URLLC communications are also machine-oriented.
  • Type Communication (MTC, Machine Type Communication) is a broader enhancement.
  • URLLC better supports the applications of transportation, manufacturing, remote control, sports entertainment and virtual reality.
  • the low-latency feature of URLLC is enhanced, which is also applicable to MBB services.
  • the feature of low latency can also better serve data users and access users more quickly, so as to improve the performance of user equipment and achieve a good user service experience.
  • the low latency of data services is related to the signal processing speed of the terminal/network.
  • the timing definition and process definition in the standard specification also greatly affect the delay characteristics.
  • NR has greatly enhanced the delay compared to LTE.
  • the design optimization is mainly the design of the frame structure and the hybrid automatic repeat request (HARQ, Hybrid Automatic Repeat reQuest) process.
  • HARQ Hybrid Automatic Repeat reQuest
  • the delay performance involves various channel types used in the entire communication process. Random Access Channel (RACH, Random Access Channel) is a channel used for terminals to initiate access requests to the network, and its delay performance also needs to be enhanced.
  • the main random access process of NR is still the traditional 4-step random access process.
  • Figure 2 shows a flow chart of the 4-step random access process.
  • the base station in Figure 2 can be an NR base station (ie gNB) or an LTE base station (ie eNB).
  • the 4-step random access The process includes the following processes:
  • Step 201 The terminal sends Msg1 to the base station.
  • the terminal sending Msg1 to the base station means that the terminal sends a preamble to the base station.
  • a terminal needs to: 1) select a preamble index; 2) select a physical random access channel (PRACH) resource for sending the preamble; 3) determine random access Radio network temporary identifier (RA-RNTI, Random Access-Radio Network Temporary Identifier); 4) Determine the transmit power of the preamble.
  • PRACH physical random access channel
  • RA-RNTI Random Access-Radio Network Temporary Identifier
  • Step 202 The base station sends Msg2 to the terminal.
  • the base station sending Msg2 to the terminal means that the terminal sends a random access response (RAR, Random Access Response) to the base station.
  • RAR Random Access Response
  • the structure of the RAR is implemented by a media access control (MAC, Media Access Control) protocol data unit (PDU, Protocol Data Unit), and the MAC PDU includes a MAC header (MAC header) part and a MAC payload (MAC payload) part.
  • MAC media access control
  • PDU Protocol Data Unit
  • MAC header MAC header
  • MAC payload MAC payload
  • the MAC payload consists of one or more MAC RARs and possible padding. If the base station detects random access requests (ie Msg1) from multiple terminals at the same time, the base station can use one MAC PDU. Respond to these random access requests, and each response to the random access request corresponds to a MAC RAR.
  • R represents a reserved bit area, which may include one or more bits; the Timing Advance Command (TAC) area carries a TA value used to notify the terminal to perform uplink synchronization.
  • TAC Timing Advance Command
  • the UL Grant (Uplink Grant) area is used to indicate the resources for uplink transmission of Msg3; the value carried in the Temporary Cell Radio Network Temporary Identifier (C-RNTI, Cell-Radio Network Temporary Identifier) area is used for subsequent terminal pairing
  • C-RNTI Temporary Cell Radio Network Temporary Identifier
  • the MAC header is composed of one or more MAC subheaders (MAC subheaders), but only one MAC subheader can include the Backoff Indicator, and this MAC subheader can only be placed in the first subheader position.
  • Other MAC subheaders that do not include Backoff Indicator correspond to a MAC RAR.
  • the MAC subheader carries a random access preamble identifier (Random Access Preamble ID, RAPID), and the RAPID is the preamble index obtained by the base station when detecting the preamble.
  • RAPID Random Access Preamble ID
  • the above-mentioned MAC PDU is transmitted on a Physical Downlink Control Channel (PDCCH), and the base station uses RA-RNTI to scramble the PDCCH and sends it to the terminal.
  • PDCCH Physical Downlink Control Channel
  • Step 203 The terminal sends Msg3 to the base station.
  • Msg3 contains an important piece of information: the identification code of the terminal, which is used for subsequent conflict resolution.
  • the terminal sends Msg3 on the resource for uplink transmission of Msg3 indicated in Msg2.
  • the resource for uplink transmission of Msg3 refers to the physical uplink shared channel (PUSCH, Physical Uplink Shared Channel).
  • Step 204 The base station sends Msg4 to the terminal.
  • the base station performs channel estimation.
  • the base station uses the composite channel results to analyze the information of one of the terminals (including information such as the terminal's identification code), and then the base station sends Msg4 (carrying contention resolution information) to the terminal, and Msg4 can complete The conflict is resolved and the random access process ends.
  • Msg4 carrier contention resolution information
  • FIG. 4 shows a flow chart of the 2-step random access process.
  • the base station in Figure 4 can be an NR base station (ie gNB) or an LTE base station (ie eNB).
  • the 2-step random access The process includes the following processes:
  • Step 401 The terminal sends MsgA to the base station.
  • Msg1 and Msg3 in the 4-step random access process are combined to form MsgA in the 2-step random access process. It can be seen that MsgA includes preamble and PUSCH.
  • Step 402 The base station sends MsgB to the terminal.
  • Msg2 and Msg4 in the 4-step random access process are combined to form MsgB in the 2-step random access process. It can be seen that MsgB includes RAR and contention resolution information.
  • the 2-step random access procedure is applied to various scenarios, including cells of different sizes, and different RRC states, such as RRC inactive state, RRC connected state, and RRC idle state.
  • the 2-step random access process defines two information structures.
  • One is Msg A.
  • MsgA includes a preamble and PUSCH.
  • preamble and PUSCH are associated.
  • MsgB which includes RAR and contention resolution information.
  • the preamble part of MsgA is a sequence with low peak-to-average ratio, which has a higher probability of acquisition on the base station side.
  • the PUSCH of MsgA is a channel with a large number of bits and has a lower detection rate relative to the preamble. Therefore, when the two are transmitted in MsgA, the PUSCH is more prone to demodulation failure. MsgA cannot be demodulated successfully, and will cause retransmission until access failure, which will increase the delay.
  • the system needs to support both a 2-step random access process and a 4-step random access process.
  • the base station needs to fall back to the 4-step random access process at any time.
  • NR does not yet have a mechanism for the terminal to distinguish whether the base station has initiated a fallback by receiving signals. In this way, the two mechanisms cannot be used in the network at the same time to adapt to diverse network deployments.
  • FIG. 5 is a schematic flowchart of a power control method according to an embodiment of the application. As shown in FIG. 5, the power control method includes the following steps:
  • Step 501 A terminal receives first configuration information sent by a network device, where the first configuration information is used to determine the power of an uplink data channel in a first message, where the first message includes a preamble and the uplink data channel .
  • the terminal may be any device capable of communicating with the network, such as a mobile phone, a notebook, a desktop computer, a vehicle-mounted terminal, and a wearable terminal.
  • the network equipment refers to a base station, such as an NR base station (ie gNB), and an LTE base station (ie eNB).
  • a base station such as an NR base station (ie gNB), and an LTE base station (ie eNB).
  • the terminal may receive the first configuration information sent by the network device in one of the following ways:
  • Manner 1 The terminal receives a first broadcast message sent by a network device, where the first broadcast message carries the first configuration information.
  • the first broadcast message is, for example, a system information block (System Information Block, SIB), or remaining minimum system information (Remaining Minimum System Information, RMSI).
  • SIB System Information Block
  • RMSI Remaining Minimum System Information
  • the first broadcast message is for all terminals in the cell where the terminal is located. Therefore, all terminals in the cell where the terminal is located will receive the first broadcast message.
  • Manner 2 The terminal receives a first unicast message sent by a network device, where the first unicast message carries the first configuration information.
  • the first unicast message is, for example, RRC dedicated signaling
  • the RRC dedicated signaling is for the terminal itself. Therefore, only the terminal itself will receive the first unicast message.
  • the first message includes a preamble and an uplink data channel.
  • the uplink data channel may be a PUSCH.
  • the first message is applied to the 2-step random access process. The flow of the 2-step random access process is shown in FIG. 4.
  • the first message sent by the terminal to the network device is MsgA in FIG. 4, where MsgA includes preamble And PUSCH.
  • MsgA adopts the structure shown in FIG. 6, in which, a preamble and a PUSCH have an association relationship, and the preamble and the PUSCH having an association relationship form an MsgA.
  • the association relationship between a preamble and a PUSCH may be reflected by at least one of the following parameters: time parameters, frequency parameters, UE ID, and Preamble ID. For example, if there is an association relationship between the Preamble ID and ⁇ time parameter, frequency parameter ⁇ , then the preamble corresponding to the Preamble ID and the PUSCH corresponding to ⁇ time parameter, frequency parameter ⁇ have an association relationship.
  • the preamble in MsgA is located before the PUSCH in time, that is, the terminal sends the preamble first and then the PUSCH.
  • the terminal determines the power of the uplink data channel in the first message through the first configuration information sent by the network device.
  • the first configuration information includes at least one power adjustment parameter; the terminal determines the power of the uplink data channel based on the at least one power adjustment parameter and the power of the preamble.
  • the power of the preamble is determined based on the cumulative amount of the maximum expected received power of the preamble and the uplift value of the preamble.
  • the maximum expected received power of the preamble and the boost value of the preamble are configured by the network device through a system broadcast message, such as SIB and RMSI.
  • the maximum expected received power of the preamble represents the maximum power of the preamble that the base station expects to receive
  • the boost value of the preamble represents the power adjustment amount of the preamble when the preamble is retransmitted (the boost value can be a positive number, It can also be a negative number)
  • the cumulative amount of uplift value can be determined based on the number of transmissions of the preamble.
  • the power of the preamble is the cumulative amount of the maximum expected received power of the preamble plus the uplift value of the preamble.
  • the at least one power adjustment parameter is used to determine a multiple of the power of the uplink data channel and the power of the preamble; the terminal is based on the power of the uplink data channel and the power of the preamble.
  • the multiple of the power of the preamble and the power of the preamble determine the power of the uplink data channel.
  • the at least one power adjustment parameter includes a first power parameter and a second power parameter
  • the first power parameter is used to indicate the ratio of the uplink data channel to the preamble (that is, the Msg3/preamble ratio)
  • the second power parameter is used to indicate the boost value of the uplink data channel (that is, the PUSCH boost value).
  • the power of the PUSCH in MsgA is a certain multiple of the power of the associated preamble, and this multiple is jointly determined by the Msg3/preamble ratio and the PUSCH uplift value.
  • the first power parameter (that is, the Msg3/preamble ratio) is configured by a network device through a system broadcast message, and the system broadcast message is, for example, SIB and RMSI.
  • the first power parameter is used for the power control of the uplink data channel of the first message and the power control of the uplink data channel in the 4-step random access process.
  • the second power parameter (that is, the PUSCH boost value) is configured by the network device through a system broadcast message, and the system broadcast message is, for example, SIB and RMSI.
  • the second power parameter is only used for power control of the uplink data channel of the first message.
  • the terminal determines the expected received power of the uplink data channel through the following formula (1):
  • P O_NOMINAL_PUSCH P O_PRE + ⁇ PREAMBLE_PUSCH + ⁇ Boost_PUSCH (1)
  • P O_NOMINAL_PUSCH represents the expected received power of the uplink data channel
  • P O_PRE represents the expected received power of the preamble
  • ⁇ PREAMBLE_PUSCH represents the first power parameter (that is, the Msg3/preamble ratio)
  • ⁇ Boost_PUSCH represents the The second power parameter (that is, the PUSCH boost value).
  • P O_NOMINAL_PUSCH,f,c P O_PRE + ⁇ PREAMBLE_PUSCH + ⁇ Boost_PUSCH (2)
  • PO_NOMINAL_PUSCH, f, c represent the expected received power of the uplink data channel, where the following table f is the carrier, the following table c is the cell, PO_PRE represents the expected received power of the preamble, and ⁇ PREAMBLE_PUSCH represents the first A power parameter (that is, Msg3/preamble ratio), ⁇ Boost_PUSCH represents the second power parameter (that is, PUSCH boost value).
  • PO_PRE , ⁇ PREAMBLE_PUSCH , and ⁇ Boost_PUSCH can be configured by a higher layer, where the higher layer may be, for example, an RRC layer, and the RRC layer has a function of broadcasting system messages.
  • the terminal when the terminal retransmits the first message, the power of the preamble is increased; the terminal is based on the at least one power adjustment parameter, and the increased The power of the preamble determines the power of the uplink data channel.
  • formula (1) or formula (2) can be used to determine the expected received power of the PUSCH, but PO_PRE needs to be increased.
  • the actual transmit power of the uplink data channel can be determined by the following formula:
  • P PUSCH min ⁇ P CMAX,f,c ,P O_NOMINAL_PUSCH,f,c +PL f,c ⁇ (3)
  • P PUSCH represents the actual transmission power of the uplink data channel
  • P CMAX, f, c represent the maximum transmission power allowed by the terminal for the first message
  • P O_NOMINAL_PUSCH, f, c represents the expectation of the uplink data channel
  • the received power, PL f, c represents the path loss measured by the terminal through the cell reference signal.
  • case 1 when the time interval between the preamble in the first message and the uplink data channel is relatively large, the terminal determines the maximum transmission power of the first message in the following manner: The maximum transmit power of the preamble in the first message is used as the maximum transmit power of the first message; or, the terminal uses the maximum transmit power of the uplink data channel in the first message as The maximum transmission power of the first message.
  • Case 2 When the time interval between the preamble in the first message and the uplink data channel is relatively small, the terminal determines the maximum transmission power of the first message in the following manner: The minimum value of the maximum transmission power of the preamble and the maximum transmission power of the uplink data channel in the message is used as the maximum transmission power of the first message.
  • FIG. 7 is a schematic diagram 1 of the flow of a random access method provided by an embodiment of this application. As shown in FIG. 7, the random access method includes the following steps:
  • Step 701 After sending the first message to the network device, the terminal receives a second message sent by the network device, where the first message includes a preamble and an uplink data channel, and the second message includes a random access response message And conflict resolution information.
  • the terminal may be any device capable of communicating with the network, such as a mobile phone, a notebook, a desktop computer, a vehicle-mounted terminal, and a wearable terminal.
  • the network device refers to a base station, such as an NR base station (i.e. gNB) and an LTE base station (i.e. eNB).
  • a base station such as an NR base station (i.e. gNB) and an LTE base station (i.e. eNB).
  • the first message includes a preamble and an uplink data channel
  • the second message includes a random access response message and conflict resolution information.
  • the first message and the second message are applied to the 2-step random access process.
  • the flow of the 2-step random access process is shown in FIG. 4.
  • the first message sent by the terminal to the network device is the MsgA in FIG. 4 , Where MsgA includes preamble and PUSCH.
  • the second message sent by the network device to the terminal is MsgB in FIG. 4, where MsgB includes RAR and contention resolution information.
  • Step 702 The terminal determines whether to fall back from the 2-step random access process to the 4-step random access process based on the second message.
  • the terminal after the terminal receives the second message (ie MsgB) from the network device in the 2-step random access process, it determines whether to fall back from the 2-step random access process to 4-step random access process.
  • the second message ie MsgB
  • the second message carries first indication information
  • the first indication information is used to instruct the terminal to continue to perform the 2-step random access procedure or to fall back from the 2-step random access procedure to step 4. Random access process.
  • the reserved bit area in the MAC RAR in the random access response message carries the first indication information.
  • the structure of RAR is realized by MAC PDU, which includes MAC header part and MAC payload part.
  • the MAC payload consists of one or more MAC RARs and possible padding. If the base station detects random access requests from multiple terminals (ie Msg1 or MsgA) at the same time, the base station uses one MAC PDU These random access requests can be responded to, and each random access request response corresponds to a MAC RAR.
  • the structure of the MAC RAR is shown in Figure 3, where R represents a reserved bit area, which may include one or more bits; the Timing Advance Command (TAC) area carries a TA value used to notify the terminal to perform uplink synchronization.
  • TAC Timing Advance Command
  • the UL Grant (Uplink Grant) area is used to indicate the uplink transmission resources; the value carried in the Temporary Cell Radio Network Temporary Identifier (C-RNTI, Cell-Radio Network Temporary Identifier) area is used for subsequent transmissions by the terminal
  • C-RNTI Temporary Cell Radio Network Temporary Identifier
  • the reserved bit area in the MAC RAR is used to carry the first indication information. For example, use any bit in the reserved bit area in the MAC RAR to carry the first indication information, and the value of this bit is 1 (or 0) to indicate that the 2-step random access process is continued.
  • the value of the bit is 0 (or 1), which means that the 2-step random access process is rolled back to the 4-step random access process.
  • the terminal successfully receives the second message it is determined to complete the 2-step random access process. Further, that the terminal successfully receives the second message means that the terminal successfully receives the random access response message and the conflict resolution information in the second message, and the random access response message does not carry all the information.
  • the first indication information, or the random access response message carries the first indication information, but the first indication information indicates to continue to perform the 2-step random access process.
  • the terminal in a case where the terminal does not successfully receive the second message, the terminal retransmits the first message to the network device.
  • the failure of the terminal to receive the second message means that the terminal cannot parse the second message; or the terminal does not receive the second message before the timer expires.
  • FIG. 8 is a schematic diagram of the second flow of the random access method provided by an embodiment of this application.
  • the base station in this embodiment corresponds to the aforementioned network equipment, and the random access method includes the following steps:
  • Step 801 The terminal sends MsgA to the base station.
  • Step 802 The terminal receives the MsgB sent by the base station. Further, if the terminal does not successfully receive the MsgB, step 801 is executed again; if the terminal detects the fallback indication information from the MsgB, step 803 is executed; if the terminal receives the complete MsgB, step 804 is executed.
  • Step 803 the terminal goes back from the 2-step random access process to the 4-step follow-up access process, that is, the terminal sends Msg3 to the base station.
  • Step 804 The terminal completes conflict resolution and ends the 2-step random access process.
  • Fig. 9 is a schematic flow diagram 3 of the random access method provided by an embodiment of this application. As shown in Fig. 9, the random access method includes the following steps:
  • Step 901 After the terminal sends the first message to the network device, if the second message sent by the network device is not successfully received, the first message is retransmitted to the network device; the first message includes the preamble And the uplink data channel, the second message includes a random access response message and conflict resolution information.
  • the terminal may be any device capable of communicating with the network, such as a mobile phone, a notebook, a desktop computer, a vehicle-mounted terminal, and a wearable terminal.
  • the network device refers to a base station, such as an NR base station (i.e. gNB) and an LTE base station (i.e. eNB).
  • a base station such as an NR base station (i.e. gNB) and an LTE base station (i.e. eNB).
  • the first message includes a preamble and an uplink data channel
  • the second message includes a random access response message and conflict resolution information.
  • the first message and the second message are applied to the 2-step random access process.
  • the flow of the 2-step random access process is shown in FIG. 4.
  • the first message sent by the terminal to the network device is the MsgA in FIG. 4 , Where MsgA includes preamble and PUSCH.
  • the second message sent by the network device to the terminal is MsgB in Figure 4, where MsgB includes RAR and contention resolution information.
  • Step 902 If the number of times that the terminal sends the first message to the network device reaches the maximum number of transmissions, and the terminal has not successfully received the second message sent by the network device, the terminal starts from step 2. The random access process falls back to the 4-step random access process.
  • the terminal may obtain the maximum number of transmissions of the first message in one of the following ways:
  • Manner 1 The terminal receives a second broadcast message sent by the network device, where the second broadcast message carries the maximum number of transmissions of the first message.
  • the second broadcast message is, for example, SIB or RMSI. It should be noted that the second broadcast message is for all terminals in the cell where the terminal is located. Therefore, all terminals in the cell where the terminal is located will receive the second broadcast message.
  • Manner 2 The terminal receives RRC dedicated signaling sent by the network device, where the RRC dedicated signaling carries the maximum number of transmissions of the first message.
  • the RRC dedicated signaling is for the terminal itself, therefore, only the terminal itself will receive the RRC dedicated signaling.
  • the unsuccessful reception of the second message sent by the network device in the above solution refers to: the second message is not received before the timer expires.
  • the terminal after the terminal reverts from the 2-step random access process to the 4-step random access process, it sends Msg1 (ie preamble) to the network device, and then performs the 4-step random access shown in FIG. The flow of the entry process.
  • Msg1 ie preamble
  • FIG. 10 is a schematic diagram of the structural composition of a power control device provided by an embodiment of the application. As shown in FIG. 10, the device includes:
  • the receiving unit 1001 is configured to receive first configuration information sent by a network device, where the first configuration information is used to determine the power of an uplink data channel in a first message, where the first message includes a preamble and the uplink Data channel.
  • the first configuration information includes at least one power adjustment parameter; the device further includes:
  • the first determining unit 1002 is configured to determine the power of the uplink data channel based on the at least one power adjustment parameter and the power of the preamble.
  • the power of the preamble is determined based on the maximum expected received power of the preamble and the cumulative amount of the uplift value of the preamble.
  • the at least one power adjustment parameter is used to determine a multiple of the power of the uplink data channel and the power of the preamble
  • the first determining unit 1002 is configured to determine the power of the uplink data channel based on the multiple of the power of the uplink data channel and the power of the preamble, and the power of the preamble.
  • the at least one power adjustment parameter includes a first power parameter and a second power parameter
  • the first power parameter is used to indicate the ratio of the uplink data channel to the preamble
  • the second power parameter is used to indicate the boost value of the uplink data channel.
  • the first power parameter is used for the power control of the uplink data channel of the first message, and the power control of the uplink data channel in the 4-step random access process;
  • the second power parameter is only used for power control of the uplink data channel of the first message.
  • the first determining unit 1002 is configured to determine the expected received power of the uplink data channel by using the following formula:
  • P O_NOMINAL_PUSCH P O_PRE + ⁇ PREAMBLE_PUSCH + ⁇ Boost_PUSCH
  • P O_NOMINAL_PUSCH represents the expected received power of the uplink data channel
  • P O_PRE represents the expected received power of the preamble
  • ⁇ PREAMBLE_PUSCH represents the first power parameter
  • ⁇ Boost_PUSCH represents the second power parameter
  • the device further includes:
  • the adjusting unit 1003 is configured to increase the power of the preamble when the first message is retransmitted;
  • the first determining unit 1002 is configured to determine the power of the uplink data channel based on the at least one power adjustment parameter and the power of the increased preamble.
  • the device further includes:
  • the second determining unit 1004 is configured to determine the maximum transmission power of the first message by using the maximum transmission power of the preamble in the first message as the maximum transmission power of the first message; Or, use the maximum transmission power of the uplink data channel in the first message as the maximum transmission power of the first message.
  • the device further includes:
  • the third determining unit 1005 is configured to determine the maximum transmit power of the first message in the following manner: the minimum of the maximum transmit power of the preamble in the first message and the maximum transmit power of the uplink data channel Value as the maximum transmit power of the first message.
  • the receiving unit 1001 is configured to receive a first broadcast message sent by a network device, where the first broadcast message carries the first configuration information; or, receive a first unicast message sent by the network device , The first unicast message carries the first configuration information.
  • the first message is applied to a 2-step random access procedure.
  • FIG. 11 is a schematic diagram 1 of the structural composition of a random access device provided by an embodiment of this application. As shown in FIG. 11, the device includes:
  • the sending unit 1101 is configured to send a first message to a network device
  • the receiving unit 1102 is configured to receive a second message sent by the network device, where the first message includes a preamble and an uplink data channel, and the second message includes a random access response message and conflict resolution information;
  • the determining unit 1103 is configured to determine whether to fall back from the 2-step random access process to the 4-step random access process based on the second message.
  • the second message carries first indication information
  • the first indication information is used to instruct the terminal to continue performing the 2-step random access procedure or to fall back from the 2-step random access procedure to the 4-step Random access process.
  • the reserved bit area in the MAC RAR in the random access response message carries the first indication information.
  • the determining unit 1103 is further configured to determine that the 2-step random access process is completed when the receiving unit successfully receives the second message.
  • the sending unit 1101 is further configured to retransmit the first message to the network device when the receiving unit does not successfully receive the second message.
  • the unsuccessful reception of the second message by the receiving unit 1102 includes:
  • the receiving unit 1102 cannot parse the second message; or,
  • the receiving unit 1102 does not receive the second message before the timer expires.
  • FIG. 12 is a schematic diagram 2 of the structural composition of a random access device provided by an embodiment of this application. As shown in FIG. 12, the device includes:
  • the communication unit 1201 is configured to retransmit the first message to the network device if the second message sent by the network device is not successfully received after sending the first message to the network device; the first message includes A preamble and an uplink data channel, the second message includes a random access response message and conflict resolution information;
  • the fallback unit 1202 is configured to, if the number of times that the communication unit sends the first message to the network device reaches the maximum number of transmissions, and the communication unit has not successfully received the second message sent by the network device, then From the 2-step random access process back to the 4-step random access process.
  • the communication unit 1201 is further configured to receive a second broadcast message sent by the network device, where the second broadcast message carries the maximum number of transmission times of the first message; or, to receive the network RRC dedicated signaling sent by the device, where the RRC dedicated signaling carries the maximum number of transmission times of the first message.
  • the unsuccessful reception of the second message sent by the network device includes: the second message is not received before a timer expires.
  • FIG. 13 is a schematic structural diagram of a communication device 1300 according to an embodiment of the present application.
  • the communication device may be a terminal.
  • the communication device 1300 shown in FIG. 13 includes a processor 1310, and the processor 1310 may call and run a computer program from the memory to implement the method in the embodiment of the present application.
  • the communication device 1300 may further include a memory 1320.
  • the processor 1310 may call and run a computer program from the memory 1320 to implement the method in the embodiment of the present application.
  • the memory 1320 may be a separate device independent of the processor 1310, or it may be integrated in the processor 1310.
  • the communication device 1300 may further include a transceiver 1330, and the processor 1310 may control the transceiver 1330 to communicate with other devices. Specifically, it may send information or data to other devices, or receive other devices. Information or data sent by the device.
  • the transceiver 1330 may include a transmitter and a receiver.
  • the transceiver 1330 may further include an antenna, and the number of antennas may be one or more.
  • the communication device 1300 may specifically be a network device of an embodiment of the present application, and the communication device 1300 may implement the corresponding process implemented by the network device in each method of the embodiment of the present application. For brevity, details are not repeated here. .
  • the communication device 1300 may specifically be a mobile terminal/terminal according to an embodiment of the application, and the communication device 1300 may implement the corresponding procedures implemented by the mobile terminal/terminal in each method of the embodiments of the application. For the sake of brevity, This will not be repeated here.
  • FIG. 14 is a schematic structural diagram of a chip of an embodiment of the present application.
  • the chip 1400 shown in FIG. 14 includes a processor 1410, and the processor 1410 can call and run a computer program from the memory to implement the method in the embodiment of the present application.
  • the chip 1400 may further include a memory 1420.
  • the processor 1410 may call and run a computer program from the memory 1420 to implement the method in the embodiment of the present application.
  • the memory 1420 may be a separate device independent of the processor 1410, or it may be integrated in the processor 1410.
  • the chip 1400 may further include an input interface 1430.
  • the processor 1410 can control the input interface 1430 to communicate with other devices or chips, and specifically, can obtain information or data sent by other devices or chips.
  • the chip 1400 may further include an output interface 1440.
  • the processor 1410 can control the output interface 1440 to communicate with other devices or chips, specifically, can output information or data to other devices or chips.
  • the chip can be applied to the network device in the embodiment of the present application, and the chip can implement the corresponding process implemented by the network device in the various methods of the embodiment of the present application.
  • the chip can implement the corresponding process implemented by the network device in the various methods of the embodiment of the present application.
  • the chip can be applied to the mobile terminal/terminal in the embodiment of the present application, and the chip can implement the corresponding process implemented by the mobile terminal/terminal in each method of the embodiment of the present application.
  • the chip can implement the corresponding process implemented by the mobile terminal/terminal in each method of the embodiment of the present application.
  • it will not be omitted here. Repeat.
  • the chip mentioned in the embodiment of the present application may also be referred to as a system-level chip, a system-on-chip, a system-on-chip, or a system-on-chip.
  • FIG. 15 is a schematic block diagram of a communication system 1500 according to an embodiment of the present application. As shown in FIG. 15, the communication system 1500 includes a terminal 1510 and a network device 1520.
  • the terminal 1510 may be used to implement the corresponding functions implemented by the terminal in the foregoing method
  • the network device 1520 may be used to implement the corresponding functions implemented by the network device in the foregoing method.
  • details are not described herein again.
  • the processor of the embodiment of the present application may be an integrated circuit chip with signal processing capability.
  • the steps of the foregoing method embodiments can be completed by hardware integrated logic circuits in the processor or instructions in the form of software.
  • the above-mentioned processor may be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (ASIC), a ready-made programmable gate array (Field Programmable Gate Array, FPGA) or other Programming logic devices, discrete gates or transistor logic devices, discrete hardware components.
  • DSP Digital Signal Processor
  • ASIC application specific integrated circuit
  • FPGA Field Programmable Gate Array
  • the methods, steps, and logical block diagrams disclosed in the embodiments of the present application can be implemented or executed.
  • the general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like.
  • the steps of the method disclosed in the embodiments of the present application may be directly embodied as being executed and completed by a hardware decoding processor, or executed and completed by a combination of hardware and software modules in the decoding processor.
  • the software module can be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, registers.
  • the storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.
  • the memory in the embodiment of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), and electrically available Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory.
  • the volatile memory may be a random access memory (Random Access Memory, RAM), which is used as an external cache.
  • RAM random access memory
  • SRAM static random access memory
  • DRAM dynamic random access memory
  • DRAM synchronous dynamic random access memory
  • DDR SDRAM Double Data Rate Synchronous Dynamic Random Access Memory
  • Enhanced SDRAM, ESDRAM Enhanced Synchronous Dynamic Random Access Memory
  • Synchronous Link Dynamic Random Access Memory Synchronous Link Dynamic Random Access Memory
  • DR RAM Direct Rambus RAM
  • the memory in the embodiment of the present application may also be static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), Synchronous DRAM (SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection Dynamic random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM), etc. That is to say, the memory in the embodiment of the present application is intended to include but not limited to these and any other suitable types of memory.
  • the embodiment of the present application also provides a computer-readable storage medium for storing computer programs.
  • the computer-readable storage medium may be applied to the network device in the embodiment of the present application, and the computer program causes the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application.
  • the computer program causes the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application.
  • the computer-readable storage medium can be applied to the mobile terminal/terminal in the embodiment of the present application, and the computer program causes the computer to execute the corresponding process implemented by the mobile terminal/terminal in each method of the embodiment of the present application, in order to It's concise, so I won't repeat it here.
  • the embodiments of the present application also provide a computer program product, including computer program instructions.
  • the computer program product may be applied to the network device in the embodiment of the present application, and the computer program instructions cause the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application.
  • the computer program instructions cause the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application.
  • the computer program instructions cause the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application.
  • the computer program product can be applied to the mobile terminal/terminal in the embodiment of the present application, and the computer program instructions cause the computer to execute the corresponding process implemented by the mobile terminal/terminal in each method of the embodiment of the present application, for the sake of brevity , I won’t repeat it here.
  • the embodiment of the present application also provides a computer program.
  • the computer program can be applied to the network device in the embodiment of the present application.
  • the computer program runs on the computer, the computer is caused to execute the corresponding process implemented by the network device in each method of the embodiment of the present application.
  • I won’t repeat it here.
  • the computer program can be applied to the mobile terminal/terminal in the embodiments of the present application.
  • the computer program runs on the computer, the computer can execute the corresponding methods implemented by the mobile terminal/terminal in the embodiments of the present application. For the sake of brevity, the process will not be repeated here.
  • the disclosed system, device, and method may be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components can be combined or It can be integrated into another system, or some features can be ignored or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
  • each unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium.
  • the technical solution of this application essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in each embodiment of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory,) ROM, random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program code .

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Abstract

本申请实施例提供一种功率控制方法及随机接入方法、装置、终端，该方法包括：终端接收网络设备发送的第一配置信息，所述第一配置信息用于确定第一消息中的上行数据信道的功率，其中，所述第一消息包括前导码和所述上行数据信道。

Description

功率控制方法及随机接入方法、装置、终端 技术领域
本申请实施例涉及移动通信技术领域，具体涉及一种功率控制方法及随机接入方法、装置、终端。
背景技术
在长期演进(Long Term Evolution，LTE)系统中，随机接入过程采用的是4步随机接入过程。在新无线(New Radio，NR)系统中仍然沿用LTE系统中的4步随机接入过程。随着标准化的讨论，认为4步随机接入过程较为繁琐，会给终端的接入带来较大的时延，因此提出了2步随机接入过程。然而，2步随机接入过程的功控和处理过程尚待定义。
发明内容
本申请实施例提供一种功率控制方法及随机接入方法、装置、终端。
本申请实施例提供的功率控制方法，包括：
终端接收网络设备发送的第一配置信息，所述第一配置信息用于确定第一消息中的上行数据信道的功率，其中，所述第一消息包括前导码和所述上行数据信道。
本申请实施例提供的随机接入方法，包括：
终端向网络设备发送第一消息后，接收所述网络设备发送的第二消息，其中，所述第一消息包括前导码和上行数据信道，所述第二消息包括随机接入响应消息和冲突解决信息；
所述终端基于所述第二消息，确定是否从2步随机接入过程回退到4步随机接入过程。
本申请实施例提供的随机接入方法，包括：
终端向网络设备发送第一消息后，如果未成功接收到所述网络设备发送的第二消息，则向所述网络设备重传所述第一消息；所述第一消息包括前导码和上行数据信道，所述第二消息包括随机接入响应消息和冲突解决信息；
如果所述终端向所述网络设备发送所述第一消息的次数达到最大传输次数，所述终端仍未成功接收到所述网络设备发送的第二消息，则所述终端从2步随机接入过程回退到4步随机接入过程。
本申请实施例提供的功率控制装置，包括：
接收单元，用于接收网络设备发送的第一配置信息，所述第一配置信息用于确定第一消息中的上行数据信道的功率，其中，所述第一消息包括前导码和所述上行数据信道。
本申请实施例提供的随机接入装置，包括：
发送单元，用于向网络设备发送第一消息；
接收单元，用于接收所述网络设备发送的第二消息，其中，所述第一消息包括前导码和上行数据信道，所述第二消息包括随机接入响应消息和冲突解决信息；
确定单元，用于基于所述第二消息，确定是否从2步随机接入过程回退到4步随机接入过程。
本申请实施例提供的随机接入装置，包括：
通信单元，用于向网络设备发送第一消息后，如果未成功接收到所述网络设备发送的第二消息，则向所述网络设备重传所述第一消息；所述第一消息包括前导码和上行数据信道，所述第二消息包括随机接入响应消息和冲突解决信息；
回退单元，用于如果所述通信单元向所述网络设备发送所述第一消息的次数达到最大传输次数，所述通信单元仍未成功接收到所述网络设备发送的第二消息，则从2步随机接入过程回退到4步随机接入过程。
本申请实施例提供的终端，包括处理器和存储器。该存储器用于存储计算机程序，该处理器用于调用并运行该存储器中存储的计算机程序，执行上述的功率控制方法或随机接入方法。
本申请实施例提供的芯片，用于实现上述的功率控制方法或随机接入方法。
具体地，该芯片包括：处理器，用于从存储器中调用并运行计算机程序，使得安装有该芯片的设备执行上述的功率控制方法或随机接入方法。
本申请实施例提供的计算机可读存储介质，用于存储计算机程序，该计算机程序使得计算机执行上述的功率控制方法或随机接入方法。
本申请实施例提供的计算机程序产品，包括计算机程序指令，该计算机程序指令使得计算机执行上述的功率控制方法或随机接入方法。
本申请实施例提供的计算机程序，当其在计算机上运行时，使得计算机执行上述的功率控制方法或随机接入方法。
通过上述技术方案，终端从网络设备获取第一配置信息，从而基于所述第一配置信息确定第一消息中的上行数据信道的功率，这里的第一消息包括前导码和所述上行数据信道，即第一消息为2步随机接入过程中的MsgA，如此，实现了对2步随机接入过程中MsgA中的上行数据信道的功率配置，从而提高了MsgA的整体解调成功的概率。另一方面，引入了从2步随机接入过程回退到4步随机接入的具体机制，该机制易于实现，从而更好地兼容各种随机接入机制。
附图说明
此处所说明的附图用来提供对本申请的进一步理解，构成本申请的一部分，本申请的示意性实施例及其说明用于解释本申请，并不构成对本申请的不当限定。在附图中：
图1是本申请实施例提供的一种通信系统架构的示意性图；
图2是本申请实施例提供的4步随机接入过程的流程图；
图3是本申请实施例提供的MAC RAR的结构示意图；
图4是本申请实施例提供的2步随机接入过程的流程图；
图5是本申请实施例的功率控制方法的流程示意图；
图6是本申请实施例的MsgA的示意图；
图7为本申请实施例提供的随机接入方法的流程示意图一；
图8为本申请实施例提供的随机接入方法的流程示意图二；
图9为本申请实施例提供的随机接入方法的流程示意图三；
图10为本申请实施例提供的功率控制装置的结构组成示意图；
图11为本申请实施例提供的随机接入装置的结构组成示意图一；
图12为本申请实施例提供的随机接入装置的结构组成示意图二；
图13是本申请实施例提供的一种通信设备示意性结构图；
图14是本申请实施例的芯片的示意性结构图；
图15是本申请实施例提供的一种通信系统的示意性框图。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行描述，显然，所描述的实施例是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
本申请实施例的技术方案可以应用于各种通信系统，例如：全球移动通讯(Global System of Mobile communication，GSM)系统、码分多址(Code Division Multiple Access，CDMA)系统、宽带码分多址(Wideband Code Division Multiple Access，WCDMA)系统、通用分组无线业务(General Packet Radio Service，GPRS)、长期演进(Long Term Evolution，LTE)系统、LTE频分双工(Frequency Division Duplex，FDD)系统、LTE时分双工(Time Division Duplex，TDD)、通用移动通信系统(Universal Mobile Telecommunication System，UMTS)、全球互联微波接入(Worldwide Interoperability for Microwave Access，WiMAX)通信系统或5G系统等。
示例性的，本申请实施例应用的通信系统100如图1所示。该通信系统100可以包括网络设备110，网络设备110可以是与终端120(或称为通信终端、终端)通信的设备。网络设备110可以为特定的地理区域提供通信覆盖，并且可以与位于该覆盖区域内的终端进行通信。可选地，该网络设备110可以是GSM系统或CDMA系统中的基站(Base Transceiver Station，BTS)，也可以是WCDMA系统中的基站(NodeB，NB)，还可以是LTE系统中的演进型基站(Evolutional Node B，eNB或eNodeB)，或者是云无线接入网络(Cloud Radio Access Network，CRAN)中的无线控制器，或者该网络设备可以为移动交换中心、中继站、接入点、车载设备、可穿戴设备、集线器、交换机、网桥、路由器、5G网络中的网络侧设备或者未来演进的公共陆地移动网络(Public Land Mobile Network，PLMN)中的网络设备等。
该通信系统100还包括位于网络设备110覆盖范围内的至少一个终端120。作为在此使用的“终端”包括但不限于经由有线线路连接，如经由公共交换电话网络(Public Switched Telephone Networks，PSTN)、数字用户线路(Digital Subscriber Line，DSL)、数字电缆、直接电缆连接；和/或另一数据连接/网络；和/或经由无线接口，如，针对蜂窝网络、无线局域网(Wireless Local Area Network，WLAN)、诸如DVB-H网络的数字电视网络、卫星网络、AM-FM广播发送器；和/或另一终端的被设置成接收/发送通信信号的装置；和/或物联网(Internet of Things，IoT)设备。被设置成通过无线接口通信的终端可以被称为“无线通信终端”、“无线终端”或“移动终端”。移动终端的示例包括但不限于卫星或蜂窝电话；可以组合蜂窝无线电电话与数据处理、传真以及数据通信能力的个人通信系统(Personal Communications System，PCS)终端；可以包括无线电电话、寻呼机、因特网/内联网接入、Web浏览器、记事簿、日历以及/或全球定位系统(Global Positioning System，GPS)接收器的PDA；以及常规膝上型和/或掌上型接收器或包括无线电电话收发器的其它电子装置。终端可以指接入终端、用户设备(User Equipment，UE)、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、用户终端、终端、无线通信设备、用户代理或用户装置。接入终端可以是蜂窝电话、无绳电话、会话启动协议(Session Initiation Protocol，SIP)电话、无线本地环路(Wireless Local Loop，WLL)站、个人数字处理(Personal Digital Assistant，PDA)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备、5G 网络中的终端或者未来演进的PLMN中的终端等。
可选地，终端120之间可以进行终端直连(Device to Device，D2D)通信。
可选地，5G系统或5G网络还可以称为新无线(New Radio，NR)系统或NR网络。
图1示例性地示出了一个网络设备和两个终端，可选地，该通信系统100可以包括多个网络设备并且每个网络设备的覆盖范围内可以包括其它数量的终端，本申请实施例对此不做限定。
可选地，该通信系统100还可以包括网络控制器、移动管理实体等其他网络实体，本申请实施例对此不作限定。
应理解，本申请实施例中网络/系统中具有通信功能的设备可称为通信设备。以图1示出的通信系统100为例，通信设备可包括具有通信功能的网络设备110和终端120，网络设备110和终端120可以为上文所述的具体设备，此处不再赘述；通信设备还可包括通信系统100中的其他设备，例如网络控制器、移动管理实体等其他网络实体，本申请实施例中对此不做限定。
应理解，本文中术语“系统”和“网络”在本文中常被可互换使用。本文中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
为便于理解本申请实施例的技术方案，以下先对本申请实施例涉及到的相关技术进行说明，应理解，以下相关技术可以与本申请实施例的技术方案进行任意结合，从而形成更丰富的技术方案。
无线蜂窝通信网络支持了大部分的移动宽带(MBB，Mobile Broad Band)业务及其增强业务。无线蜂窝通信网络主要的服务场景是为移动终端(如手持设备)提供广泛覆盖数据服务。
NR是第三代合作伙伴计划(3GPP，The3rd Generation Partnership Project)标准上的最新研究，NR通过无线蜂窝网络支持低时延高可靠(URLLC，Ultra Reliability and Low Latency Communication)通信，URLLC通信也是面向机器类型通信(MTC，Machine Type Communication)的一种更广泛的增强。URLLC更好地支持了交通，制造，远程控制，文体娱乐和虚拟现实的应用。URLLC的低时延的特性增强，同样适用于MBB业务。低时延的特征，也可以更好地服务数据用户，更快速地接入用户，从而达到提升用户设备的性能和达成良好用户业务体验。
数据业务的低时延和终端/网络的信号处理速度有关。然而，标准规范中的时序定义和过程定义也极大地影响时延特性。NR通过引入一定的设计优化，已经比LTE的时延大大增强。其设计优化主要是帧结构和混合自动重传请求(HARQ，Hybrid Automatic Repeat reQuest)过程的设计。然而，时延性能涉及到用于整个通信过程中的各种信道类型。随机接入信道(RACH，Random Access Channel)是用于终端向网络发起接入请求的信道，其时延性能也需要增强。
NR的主要随机接入过程仍然是传统的4步随机接入过程。图2给出了4步随机接入过程的流程图，图2中的基站可以是NR基站(即gNB)，也可以是LTE基站(即eNB)，如图2所示，4步随机接入过程包括如下流程：
步骤201：终端向基站发送Msg1。
这里，终端向基站发送Msg1也即是终端向基站发送前导码(preamble)。
具体地，终端要发送preamble，需要：1)选择前导码索引(preamble index)；2)选择用于发送preamble的物理随机接入信道(Physical Random Access Channel，PRACH)资源；3)确定随机接入无线网络临时标识符(RA-RNTI，Random Access-Radio Network  Temporary Identifier)；4)确定preamble的发射功率。
步骤202：基站向终端发送Msg2。
这里，基站向终端发送Msg2也即是终端向基站发送随机接入响应(RAR，Random Access Response)。
具体地，RAR的结构通过媒体接入控制(MAC，Media Access Control)协议数据单元(PDU，Protocol Data Unit)来实现，MAC PDU包括MAC头(MAC header)部分和MAC负荷(MAC payload)部分。
其中，MAC payload由一个或多个MAC RAR以及可能存在的填充(padding)组成，如果基站同一时间内检测到来自多个终端的随机接入请求(即Msg1)，则基站使用一个MAC PDU就可以对这些随机接入请求进行响应，每个随机接入请求的响应对应一个MAC RAR。MAC RAR的结构如图3所示，其中，R代表保留比特区域，可以包括一个或多个比特；时间提前命令(TAC，Timing Advance Command)区域携带用于通知终端进行上行同步的TA值。上行授权(UL Grant，Uplink Grant)区域用于指示上行传输Msg3的资源；临时(Temporary)小区无线网络临时标识符(C-RNTI，Cell-Radio Network Temporary Identifier)区域携带的值用于终端后续对发送的Msg3消息进行加扰。
其中，MAC header由一个或多个MAC子头(MAC subheader)组成，但只能有1个MAC subheader可以包含Backoff Indicator，且这个MAC subheader只能放在第一个子头位置。其他没有包括Backoff Indicator的MAC subheader均对应一个MAC RAR。MAC subheader携带随机接入前导标示符(Random Access Preamble ID，RAPID)，该RAPID为基站在检测preamble时得到的preamble index。
上述MAC PDU在物理下行控制信道(Physical Downlink Control Channel，PDCCH)上传输，基站使用RA-RNTI对PDCCH进行加扰后发送给终端。
步骤203：终端向基站发送Msg3。
这里，Msg3中包含一个重要信息：终端的识别码，该识别码用于后续的冲突解决。终端在Msg2中所指示的上行传输Msg3的资源上发送Msg3。这里，上行传输Msg3的资源是指物理上行共享信道(PUSCH，Physical Uplink Shared Channel)。
步骤204：基站向终端发送Msg4。
基站进行信道估计(channel estimation)，基站应用复合信道结果解析出其中一个终端的信息(包括这个终端的识别码等信息)，然后，基站向该终端发送Msg4(携带竞争解决信息)，Msg4可以完成冲突解决而结束随机接入过程。
以上的4步接入过程较为繁琐，给终端的随机接入带来了较大的时延。为此，提出了2步随机接入过程。图4给出了2步随机接入过程的流程图，图4中的基站可以是NR基站(即gNB)，也可以是LTE基站(即eNB)，如图4所示，2步随机接入过程包括如下流程：
步骤401：终端向基站发送MsgA。
这里，将4步随机接入过程中的Msg1和Msg3进行合并，形成2步随机接入过程中的MsgA。可见，MsgA包括preamble和PUSCH。
步骤402：基站向终端发送MsgB。
这里，将4步随机接入过程中的Msg2和Msg4进行合并，形成2步随机接入过程中的MsgB。可见，MsgB包括RAR和竞争解决信息。
需要说明的是，2步随机接入过程应用于各种场景，包括不同大小的小区，不同的RRC状态，如RRC非激活态，RRC连接态，RRC空闲态。
2步随机接入过程定义了两种信息结构，一种是Msg A，MsgA包括一个preamble 和PUSCH，这里，preamble和PUSCH具有关联关系。另一种是MsgB，MsgB包括RAR和竞争解决信息。
2步随机接入过程的功控和处理过程尚待定义。可能会出现如下问题：
1、在2步随机接入过程中，MsgA的preamble部分为低峰均比的序列，在基站侧有较高的获取概率。MsgA的PUSCH为比特数较多的信道，相对preamble的检测率更低。因此当二者在MsgA中传输时，PUSCH更容易出现解调失败的问题。MsgA不能全部解调成功，会导致重传直至接入失败，从而使得时延变长。
2、系统需要同时支持2步随机接入过程和4步随机接入过程。当2步随机接入的MsgA获取失败时，基站需要随时回退到4步随机接入过程。NR还没有机制去让终端侧通过接收信号去区分基站是否发起了回退。这样就无法很好地同时在网络中同时使用两种机制以适应多样的网络部署。
为了实现2步随机接入过程的功率控制，以及实现从2步随机接入过程回退到4步随机接入过程的机制，提出本申请实施例的以下技术方案。
图5为本申请实施例的功率控制方法的流程示意图，如图5所示，所述功率控制方法包括以下步骤：
步骤501：终端接收网络设备发送的第一配置信息，所述第一配置信息用于确定第一消息中的上行数据信道的功率，其中，所述第一消息包括前导码和所述上行数据信道。
本申请实施例中，所述终端可以是手机、笔记本、台式机、车载终端、可穿戴式终端等任意能够与网络进行通信的设备。
本申请实施例中，所述网络设备是指基站，例如NR基站(即gNB)，LTE基站(即eNB)。
本申请实施例中，终端可以通过以下其中一种方式接收网络设备发送的第一配置信息：
方式一：终端接收网络设备发送的第一广播消息，所述第一广播消息携带所述第一配置信息。
这里，第一广播消息例如是系统信息块(System Information Block，SIB)，或者剩余最小系统信息(Remaining Minimum System Information，RMSI)。
需要说明的是，第一广播消息是针对终端所在小区内的所有终端的，因此，终端所在小区内的所有终端都会收到该第一广播消息。
方式二：终端接收网络设备发送的第一单播消息，所述第一单播消息携带所述第一配置信息。
这里，所述第一单播消息例如是RRC专有信令，该RRC专有信令是针对终端自己的，因此，只有终端自己会收到第一单播消息。
本申请实施例中，所述第一消息包括前导码(preamble)和上行数据信道，进一步，所述上行数据信道可以是PUSCH。所述第一消息应用于2步随机接入过程，2步随机接入过程的流程参照图4所示，终端向网络设备发送的第一消息即为图4中的MsgA，其中，MsgA包括preamble和PUSCH。
这里，MsgA采用如图6所示的结构，其中，一个前导码和一个PUSCH之间具有关联关系，具有关联关系的前导码和PUSCH构成一个MsgA。进一步，一个前导码和一个PUSCH之间的关联关系可以通过以下至少一种参数来体现：时间参数，频率参数，UE ID，Preamble ID。举个例子：Preamble ID与{时间参数，频率参数}之间如果具有关联关系，那么，Preamble ID对应的前导码和{时间参数，频率参数}对应的PUSCH就具有关联关系。需要说明的是，MsgA中的preamble在时间上位于PUSCH之前，即终端先发送preamble后发送PUSCH。
本申请实施例中，终端通过网络设备发送的第一配置信息来确定第一消息中的上行数据信道的功率。具体地，所述第一配置信息包括至少一个功率调整参数；所述终端基于所述至少一个功率调整参数，以及所述前导码的功率，确定所述上行数据信道的功率。
本申请实施例中，所述前导码的功率基于所述前导码的最大期望接收功率和所述前导码的抬升值的累计量确定。
其中，所述前导码的最大期望接收功率以及所述前导码的抬升值由网络设备通过系统广播消息配置，例如SIB，RMSI。所述前导码的最大期望接收功率代表了基站期望接收到的前导码的最大功率，所述前导码的抬升值代表了重传前导码时该前导码的功率调整量(抬升值可以是正数，也可以是负数)，基于前导码的传输次数可以确定出抬升值的累计量。所述前导码的功率是该前导码的最大期望接收功率加上前导码的抬升值的累计量。
在本申请的一种实施方式中，所述至少一个功率调整参数用于确定所述上行数据信道的功率与所述前导码的功率的倍数；所述终端基于所述上行数据信道的功率与所述前导码的功率的倍数，以及所述前导码的功率，确定所述上行数据信道的功率。
具体地，所述至少一个功率调整参数包括第一功率参数和第二功率参数，所述第一功率参数用于表示所述上行数据信道与所述前导码的比值(也即Msg3/preamble比值)，所述第二功率参数用于表示所述上行数据信道的抬升值(也即PUSCH抬升值)。换句话说，MsgA中的PUSCH的功率为其所关联的preamble的功率的一定倍数，这个倍数由Msg3/preamble比值和PUSCH抬升值联合决定。
上述方案中，所述第一功率参数(也即Msg3/preamble比值)由网络设备通过系统广播消息进行配置，系统广播消息例如是SIB，RMSI。此外，所述第一功率参数用于所述第一消息的上行数据信道的功率控制，以及4步随机接入过程中的上行数据信道的功率控制。
上述方案中，所述第二功率参数(也即PUSCH抬升值)由网络设备通过系统广播消息进行配置，系统广播消息例如是SIB，RMSI。此外，所述第二功率参数仅用于所述第一消息的上行数据信道的功率控制。
以下结合具体公式对本申请实施例的上述技术方案进行详细说明。
所述终端通过以下公式(1)确定所述上行数据信道的期望接收功率：
P O_NOMINAL_PUSCH＝P O_PRE+△ PREAMBLE_PUSCH+△ Boost_PUSCH  (1)
其中，P O_NOMINAL_PUSCH代表所述上行数据信道的期望接收功率，P O_PRE代表所述前导码的期望接收功率，△ PREAMBLE_PUSCH代表所述第一功率参数(也即Msg3/preamble比值)，△ Boost_PUSCH代表所述第二功率参数(也即PUSCH抬升值)。
需要说明的是，上述公式(1)中P O_NOMINAL_PUSCH和P O_PRE的单位为dBm，△ PREAMBLE_PUSCH和△ Boost_PUSCH的单位为dB。
进一步，如果考虑到载波和小区这两个维度，上述公式(1)可以表示成如下公式(2)：
P O_NOMINAL_PUSCH,f,c＝P O_PRE+△ PREAMBLE_PUSCH+△ Boost_PUSCH  (2)
其中，P O_NOMINAL_PUSCH,f,c代表所述上行数据信道的期望接收功率，其中下表f为载波，下表c为小区，P O_PRE代表所述前导码的期望接收功率，△ PREAMBLE_PUSCH代表所述第一功率参数(也即Msg3/preamble比值)，△ Boost_PUSCH代表所述第二功率参数(也即PUSCH抬升值)。
上述公式(1)和公式(2)中，P O_PRE，△ PREAMBLE_PUSCH，△ Boost_PUSCH，可以通过高 层进行配置，其中，高层例如可以是RRC层，RRC层具有广播系统消息的功能。
在本申请的一种实施方式中，所述终端重传所述第一消息的情况下，增大所述前导码的功率；所述终端基于所述至少一个功率调整参数，以及增大后的所述前导码的功率，确定所述上行数据信道的功率。
举个例子：终端重传MsgA时，可以采用公式(1)或公式(2)来确定PUSCH的期望接收功率，但是，需要增大P O_PRE。
本申请实施例中，确定出上行数据信道的期望接收功率后，可以通过以下公式确定上行数据信道的实际发射功率：
P PUSCH＝min{P CMAX,f,c,P O_NOMINAL_PUSCH,f,c+PL f,c}  (3)
其中，P PUSCH代表所述上行数据信道的实际发射功率，P CMAX,f,c代表终端对于所述第一消息所允许的最大发射功率，P O_NOMINAL_PUSCH,f,c代表所述上行数据信道的期望接收功率，PL f,c代表终端通过小区参考信号测量出的路损。
进一步，情况一：在所述第一消息中的前导码和上行数据信道之间的时间间隔较大时，所述终端通过以下方式确定所述第一消息的最大发射功率：所述终端将所述第一消息中的所述前导码的最大发射功率，作为所述第一消息的最大发射功率；或者，所述终端将所述第一消息中的所述上行数据信道的最大发射功率，作为所述第一消息的最大发射功率。情况二：在所述第一消息中的前导码和上行数据信道之间的时间间隔较小时，所述终端通过以下方式确定所述第一消息的最大发射功率：所述终端将所述第一消息中的所述前导码的最大发射功率和所述上行数据信道的最大发射功率的最小值，作为所述第一消息的最大发射功率。
图7为本申请实施例提供的随机接入方法的流程示意图一，如图7所示，所述随机接入方法包括以下步骤：
步骤701：终端向网络设备发送第一消息后，接收所述网络设备发送的第二消息，其中，所述第一消息包括前导码和上行数据信道，所述第二消息包括随机接入响应消息和冲突解决信息。
本申请实施例中，所述终端可以是手机、笔记本、台式机、车载终端、可穿戴式终端等任意能够与网络进行通信的设备。
本申请实施例中，所述网络设备是指基站，例如NR基站(即gNB)，LTE基站(即eNB)。
本申请实施例中，所述第一消息包括前导码和上行数据信道，所述第二消息包括随机接入响应消息和冲突解决信息。所述第一消息和所述第二消息应用于2步随机接入过程，2步随机接入过程的流程参照图4所示，终端向网络设备发送的第一消息即为图4中的MsgA，其中，MsgA包括preamble和PUSCH。网络设备向终端发送的第二消息即为图4中的MsgB，其中，MsgB包括RAR和竞争解决信息。
步骤702：所述终端基于所述第二消息，确定是否从2步随机接入过程回退到4步随机接入过程。
本申请实施例中，所述终端在2步随机接入过程中从网络设备接收到第二消息(即MsgB)后，根据该第二消息的内容判断是否从2步随机接入过程回退到4步随机接入过程。
本申请实施例中，所述第二消息携带第一指示信息，所述第一指示信息用于指示所述终端继续执行2步随机接入过程或者从2步随机接入过程回退到4步随机接入过程。
具体实现时，所述随机接入响应消息中的MAC RAR中的保留比特区域携带所述第一指示信息。举个例子：RAR的结构通过MAC PDU来实现，MAC PDU包括MAC头 (MAC header)部分和MAC负荷(MAC payload)部分。
其中，MAC payload由一个或多个MAC RAR以及可能存在的填充(padding)组成，如果基站同一时间内检测到来自多个终端的随机接入请求(即Msg1或MsgA)，则基站使用一个MAC PDU就可以对这些随机接入请求进行响应，每个随机接入请求的响应对应一个MAC RAR。MAC RAR的结构如图3所示，其中，R代表保留比特区域，可以包括一个或多个比特；时间提前命令(TAC，Timing Advance Command)区域携带用于通知终端进行上行同步的TA值。上行授权(UL Grant，Uplink Grant)区域用于指示上行传输资源；临时(Temporary)小区无线网络临时标识符(C-RNTI，Cell-Radio Network Temporary Identifier)区域携带的值用于终端后续对发送的消息进行加扰。本申请实施例利用MAC RAR中的保留比特区域携带所述第一指示信息。举个例子：利用MAC RAR中的保留比特区域中的任意一个比特位来携带所述第一指示信息，该比特位的取值为1(或者0)表示继续执行2步随机接入过程，该比特位的取值为0(或者1)表示从2步随机接入过程回退到4步随机接入过程。
在本申请的一种实施方式中，所述终端成功接收到所述第二消息的情况下，确定完成2步随机接入过程。进一步，所述终端成功接收到所述第二消息是指：所述终端成功接收到所述第二消息中的随机接入响应消息和冲突解决信息，且所述随机接入响应消息未携带所述第一指示信息，或者，所述随机接入响应消息携带所述第一指示信息，但该第一指示信息指示继续执行2步随机接入过程。
在本申请的一种实施方式中，所述终端未成功接收到所述第二消息的情况下，向所述网络设备重传所述第一消息。其中，所述终端未成功接收到所述第二消息，是指：所述终端无法解析所述第二消息；或者，所述终端在定时器超时前未接收到所述第二消息。
图8为本申请实施例提供的随机接入方法的流程示意图二，如图8所示，本实施例中的基站对应前述的网络设备，所述随机接入方法包括以下步骤：
步骤801：终端向基站发送MsgA。
步骤802：终端接收基站发送的MsgB。进一步，如果终端未成功接收到MsgB，则再次执行步骤801；如果终端从MsgB中检测到回退指示信息，则执行步骤803；如果终端接收到完整的MsgB，则执行步骤804。
步骤803：终端从2步随机接入过程回退到4步随接入过程，即：终端向基站发送Msg3。
步骤804：终端完成冲突解决，结束2步随机接入过程。
图9为本申请实施例提供的随机接入方法的流程示意图三，如图9所示，所述随机接入方法包括以下步骤：
步骤901：终端向网络设备发送第一消息后，如果未成功接收到所述网络设备发送的第二消息，则向所述网络设备重传所述第一消息；所述第一消息包括前导码和上行数据信道，所述第二消息包括随机接入响应消息和冲突解决信息。
本申请实施例中，所述终端可以是手机、笔记本、台式机、车载终端、可穿戴式终端等任意能够与网络进行通信的设备。
本申请实施例中，所述网络设备是指基站，例如NR基站(即gNB)，LTE基站(即eNB)。
本申请实施例中，所述第一消息包括前导码和上行数据信道，所述第二消息包括随机接入响应消息和冲突解决信息。所述第一消息和所述第二消息应用于2步随机接入过程，2步随机接入过程的流程参照图4所示，终端向网络设备发送的第一消息即为图4中的MsgA，其中，MsgA包括preamble和PUSCH。网络设备向终端发送的第二消息即 为图4中的MsgB，其中，MsgB包括RAR和竞争解决信息。
步骤902：如果所述终端向所述网络设备发送所述第一消息的次数达到最大传输次数，所述终端仍未成功接收到所述网络设备发送的第二消息，则所述终端从2步随机接入过程回退到4步随机接入过程。
本申请实施例中，所述终端可以通过以下其中一种方式获取所述第一消息的最大传输次数：
方式一：所述终端接收所述网络设备发送的第二广播消息，所述第二广播消息携带所述第一消息的最大传输次数。
这里，第二广播消息例如是SIB，或者RMSI。需要说明的是，第二广播消息是针对终端所在小区内的所有终端的，因此，终端所在小区内的所有终端都会收到该第二广播消息。
方式二：所述终端接收所述网络设备发送的RRC专有信令，所述RRC专有信令携带所述第一消息的最大传输次数。
这里，所述RRC专有信令是针对终端自己的，因此，只有终端自己会收到RRC专有信令。
上述方案中的未成功接收到所述网络设备发送的第二消息，是指：在定时器超时前未接收到所述第二消息。
本申请实施例中，所述终端从2步随机接入过程回退到4步随机接入过程后，向所述网络设备发送Msg1(即preamble)，后续执行图2所示的4步随机接入过程的流程。
图10为本申请实施例提供的功率控制装置的结构组成示意图，如图10所示，所述装置包括：
接收单元1001，用于接收网络设备发送的第一配置信息，所述第一配置信息用于确定第一消息中的上行数据信道的功率，其中，所述第一消息包括前导码和所述上行数据信道。
在一实施方式中，所述第一配置信息包括至少一个功率调整参数；所述装置还包括：
第一确定单元1002，用于基于所述至少一个功率调整参数，以及所述前导码的功率，确定所述上行数据信道的功率。
在一实施方式中，所述前导码的功率基于所述前导码的最大期望接收功率和所述前导码的抬升值的累计量确定。
在一实施方式中，所述至少一个功率调整参数用于确定所述上行数据信道的功率与所述前导码的功率的倍数；
所述第一确定单元1002，用于基于所述上行数据信道的功率与所述前导码的功率的倍数，以及所述前导码的功率，确定所述上行数据信道的功率。
在一实施方式中，所述至少一个功率调整参数包括第一功率参数和第二功率参数，所述第一功率参数用于表示所述上行数据信道与所述前导码的比值，所述第二功率参数用于表示所述上行数据信道的抬升值。
在一实施方式中，所述第一功率参数用于所述第一消息的上行数据信道的功率控制，以及4步随机接入过程中的上行数据信道的功率控制；
所述第二功率参数仅用于所述第一消息的上行数据信道的功率控制。
在一实施方式中，所述第一确定单元1002，用于通过以下公式确定所述上行数据信道的期望接收功率：
P O_NOMINAL_PUSCH＝P O_PRE+△ PREAMBLE_PUSCH+△ Boost_PUSCH
其中，P O_NOMINAL_PUSCH代表所述上行数据信道的期望接收功率，P O_PRE代表所述 前导码的期望接收功率，△ PREAMBLE_PUSCH代表所述第一功率参数，△ Boost_PUSCH代表所述第二功率参数。
在一实施方式中，所述装置还包括：
调整单元1003，用于重传所述第一消息的情况下，增大所述前导码的功率；
所述第一确定单元1002，用于基于所述至少一个功率调整参数，以及增大后的所述前导码的功率，确定所述上行数据信道的功率。
在一实施方式中，所述装置还包括：
第二确定单元1004，用于通过以下方式确定所述第一消息的最大发射功率：将所述第一消息中的所述前导码的最大发射功率，作为所述第一消息的最大发射功率；或者，将所述第一消息中的所述上行数据信道的最大发射功率，作为所述第一消息的最大发射功率。
在一实施方式中，所述装置还包括：
第三确定单元1005，用于通过以下方式确定所述第一消息的最大发射功率：将所述第一消息中的所述前导码的最大发射功率和所述上行数据信道的最大发射功率的最小值，作为所述第一消息的最大发射功率。
在一实施方式中，所述接收单元1001，用于接收网络设备发送的第一广播消息，所述第一广播消息携带所述第一配置信息；或者，接收网络设备发送的第一单播消息，所述第一单播消息携带所述第一配置信息。
在一实施方式中，所述第一消息应用于2步随机接入过程。
本领域技术人员应当理解，本申请实施例的上述功率控制装置的相关描述可以参照本申请实施例的功率控制方法的相关描述进行理解。
图11为本申请实施例提供的随机接入装置的结构组成示意图一，如图11所示，所述装置包括：
发送单元1101，用于向网络设备发送第一消息；
接收单元1102，用于接收所述网络设备发送的第二消息，其中，所述第一消息包括前导码和上行数据信道，所述第二消息包括随机接入响应消息和冲突解决信息；
确定单元1103，用于基于所述第二消息，确定是否从2步随机接入过程回退到4步随机接入过程。
在一实施方式中，所述第二消息携带第一指示信息，所述第一指示信息用于指示所述终端继续执行2步随机接入过程或者从2步随机接入过程回退到4步随机接入过程。
在一实施方式中，所述随机接入响应消息中的MAC RAR中的保留比特区域携带所述第一指示信息。
在一实施方式中，所述确定单元1103，还用于在所述接收单元成功接收到所述第二消息的情况下，确定完成2步随机接入过程。
在一实施方式中，所述发送单元1101，还用于在所述接收单元未成功接收到所述第二消息的情况下，向所述网络设备重传所述第一消息。
在一实施方式中，所述接收单元1102未成功接收到所述第二消息，包括：
所述接收单元1102无法解析所述第二消息；或者，
所述接收单元1102在定时器超时前未接收到所述第二消息。
本领域技术人员应当理解，本申请实施例的上述随机接入装置的相关描述可以参照本申请实施例的随机接入方法的相关描述进行理解。
图12为本申请实施例提供的随机接入装置的结构组成示意图二，如图12所示，所述装置包括：
通信单元1201，用于向网络设备发送第一消息后，如果未成功接收到所述网络设备发送的第二消息，则向所述网络设备重传所述第一消息；所述第一消息包括前导码和上行数据信道，所述第二消息包括随机接入响应消息和冲突解决信息；
回退单元1202，用于如果所述通信单元向所述网络设备发送所述第一消息的次数达到最大传输次数，所述通信单元仍未成功接收到所述网络设备发送的第二消息，则从2步随机接入过程回退到4步随机接入过程。
在一实施方式中，所述通信单元1201，还用于接收所述网络设备发送的第二广播消息，所述第二广播消息携带所述第一消息的最大传输次数；或者，接收所述网络设备发送的RRC专有信令，所述RRC专有信令携带所述第一消息的最大传输次数。
在一实施方式中，所述未成功接收到所述网络设备发送的第二消息，包括：在定时器超时前未接收到所述第二消息。
本领域技术人员应当理解，本申请实施例的上述随机接入装置的相关描述可以参照本申请实施例的随机接入方法的相关描述进行理解。
图13是本申请实施例提供的一种通信设备1300示意性结构图。该通信设备可以是终端，图13所示的通信设备1300包括处理器1310，处理器1310可以从存储器中调用并运行计算机程序，以实现本申请实施例中的方法。
可选地，如图13所示，通信设备1300还可以包括存储器1320。其中，处理器1310可以从存储器1320中调用并运行计算机程序，以实现本申请实施例中的方法。
其中，存储器1320可以是独立于处理器1310的一个单独的器件，也可以集成在处理器1310中。
可选地，如图13所示，通信设备1300还可以包括收发器1330，处理器1310可以控制该收发器1330与其他设备进行通信，具体地，可以向其他设备发送信息或数据，或接收其他设备发送的信息或数据。
其中，收发器1330可以包括发射机和接收机。收发器1330还可以进一步包括天线，天线的数量可以为一个或多个。
可选地，该通信设备1300具体可为本申请实施例的网络设备，并且该通信设备1300可以实现本申请实施例的各个方法中由网络设备实现的相应流程，为了简洁，在此不再赘述。
可选地，该通信设备1300具体可为本申请实施例的移动终端/终端，并且该通信设备1300可以实现本申请实施例的各个方法中由移动终端/终端实现的相应流程，为了简洁，在此不再赘述。
图14是本申请实施例的芯片的示意性结构图。图14所示的芯片1400包括处理器1410，处理器1410可以从存储器中调用并运行计算机程序，以实现本申请实施例中的方法。
可选地，如图14所示，芯片1400还可以包括存储器1420。其中，处理器1410可以从存储器1420中调用并运行计算机程序，以实现本申请实施例中的方法。
其中，存储器1420可以是独立于处理器1410的一个单独的器件，也可以集成在处理器1410中。
可选地，该芯片1400还可以包括输入接口1430。其中，处理器1410可以控制该输入接口1430与其他设备或芯片进行通信，具体地，可以获取其他设备或芯片发送的信息或数据。
可选地，该芯片1400还可以包括输出接口1440。其中，处理器1410可以控制该输出接口1440与其他设备或芯片进行通信，具体地，可以向其他设备或芯片输出信息或数据。
可选地，该芯片可应用于本申请实施例中的网络设备，并且该芯片可以实现本申请实施例的各个方法中由网络设备实现的相应流程，为了简洁，在此不再赘述。
可选地，该芯片可应用于本申请实施例中的移动终端/终端，并且该芯片可以实现本申请实施例的各个方法中由移动终端/终端实现的相应流程，为了简洁，在此不再赘述。
应理解，本申请实施例提到的芯片还可以称为系统级芯片，系统芯片，芯片系统或片上系统芯片等。
图15是本申请实施例提供的一种通信系统1500的示意性框图。如图15所示，该通信系统1500包括终端1510和网络设备1520。
其中，该终端1510可以用于实现上述方法中由终端实现的相应的功能，以及该网络设备1520可以用于实现上述方法中由网络设备实现的相应的功能为了简洁，在此不再赘述。
应理解，本申请实施例的处理器可能是一种集成电路芯片，具有信号的处理能力。在实现过程中，上述方法实施例的各步骤可以通过处理器中的硬件的集成逻辑电路或者软件形式的指令完成。上述的处理器可以是通用处理器、数字信号处理器(Digital Signal Processor，DSP)、专用集成电路(Application Specific Integrated Circuit，ASIC)、现成可编程门阵列(Field Programmable Gate Array，FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件。可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。结合本申请实施例所公开的方法的步骤可以直接体现为硬件译码处理器执行完成，或者用译码处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器，处理器读取存储器中的信息，结合其硬件完成上述方法的步骤。
可以理解，本申请实施例中的存储器可以是易失性存储器或非易失性存储器，或可包括易失性和非易失性存储器两者。其中，非易失性存储器可以是只读存储器(Read-Only Memory，ROM)、可编程只读存储器(Programmable ROM，PROM)、可擦除可编程只读存储器(Erasable PROM，EPROM)、电可擦除可编程只读存储器(Electrically EPROM，EEPROM)或闪存。易失性存储器可以是随机存取存储器(Random Access Memory，RAM)，其用作外部高速缓存。通过示例性但不是限制性说明，许多形式的RAM可用，例如静态随机存取存储器(Static RAM，SRAM)、动态随机存取存储器(Dynamic RAM，DRAM)、同步动态随机存取存储器(Synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(Double Data Rate SDRAM，DDR SDRAM)、增强型同步动态随机存取存储器(Enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(Synchlink DRAM，SLDRAM)和直接内存总线随机存取存储器(Direct Rambus RAM，DR RAM)。应注意，本文描述的系统和方法的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
应理解，上述存储器为示例性但不是限制性说明，例如，本申请实施例中的存储器还可以是静态随机存取存储器(static RAM，SRAM)、动态随机存取存储器(dynamic RAM，DRAM)、同步动态随机存取存储器(synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(double data rate SDRAM，DDR SDRAM)、增强型同步动态随机存取存储器(enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(synch link DRAM，SLDRAM)以及直接内存总线随机存取存储器(Direct Rambus RAM，DR RAM)等等。也就是说，本申请实施例中的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
本申请实施例还提供了一种计算机可读存储介质，用于存储计算机程序。
可选的，该计算机可读存储介质可应用于本申请实施例中的网络设备，并且该计算机程序使得计算机执行本申请实施例的各个方法中由网络设备实现的相应流程，为了简洁，在此不再赘述。
可选地，该计算机可读存储介质可应用于本申请实施例中的移动终端/终端，并且该计算机程序使得计算机执行本申请实施例的各个方法中由移动终端/终端实现的相应流程，为了简洁，在此不再赘述。
本申请实施例还提供了一种计算机程序产品，包括计算机程序指令。
可选的，该计算机程序产品可应用于本申请实施例中的网络设备，并且该计算机程序指令使得计算机执行本申请实施例的各个方法中由网络设备实现的相应流程，为了简洁，在此不再赘述。
可选地，该计算机程序产品可应用于本申请实施例中的移动终端/终端，并且该计算机程序指令使得计算机执行本申请实施例的各个方法中由移动终端/终端实现的相应流程，为了简洁，在此不再赘述。
本申请实施例还提供了一种计算机程序。
可选的，该计算机程序可应用于本申请实施例中的网络设备，当该计算机程序在计算机上运行时，使得计算机执行本申请实施例的各个方法中由网络设备实现的相应流程，为了简洁，在此不再赘述。
可选地，该计算机程序可应用于本申请实施例中的移动终端/终端，当该计算机程序在计算机上运行时，使得计算机执行本申请实施例的各个方法中由移动终端/终端实现的相应流程，为了简洁，在此不再赘述。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以 是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(Read-Only Memory，)ROM、随机存取存储器(Random Access Memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应所述以权利要求的保护范围为准。

Claims (47)

  1. 一种功率控制方法，所述方法包括：
    终端接收网络设备发送的第一配置信息，所述第一配置信息用于确定第一消息中的上行数据信道的功率，其中，所述第一消息包括前导码和所述上行数据信道。
  2. 根据权利要求1所述的方法，其中，所述第一配置信息包括至少一个功率调整参数；所述方法还包括：
    所述终端基于所述至少一个功率调整参数，以及所述前导码的功率，确定所述上行数据信道的功率。
  3. 根据权利要求2所述的方法，其中，所述前导码的功率基于所述前导码的最大期望接收功率和所述前导码的抬升值的累计量确定。
  4. 根据权利要求2或3所述的方法，其中，所述至少一个功率调整参数用于确定所述上行数据信道的功率与所述前导码的功率的倍数；
    所述终端基于所述至少一个功率调整参数，以及所述前导码的功率，确定所述上行数据信道的功率，包括：
    所述终端基于所述上行数据信道的功率与所述前导码的功率的倍数，以及所述前导码的功率，确定所述上行数据信道的功率。
  5. 根据权利要求4所述的方法，其中，所述至少一个功率调整参数包括第一功率参数和第二功率参数，所述第一功率参数用于表示所述上行数据信道与所述前导码的比值，所述第二功率参数用于表示所述上行数据信道的抬升值。
  6. 根据权利要求5所述的方法，其中，
    所述第一功率参数用于所述第一消息的上行数据信道的功率控制，以及4步随机接入过程中的上行数据信道的功率控制；
    所述第二功率参数仅用于所述第一消息的上行数据信道的功率控制。
  7. 根据权利要求5或6所述的方法，其中，所述终端基于所述上行数据信道的功率与所述前导码的功率的倍数，以及所述前导码的功率，确定所述上行数据信道的功率，包括：
    所述终端通过以下公式确定所述上行数据信道的期望接收功率：
    P O_NOMINAL_PUSCH＝P O_PRE+△ PREAMBLE_PUSCH+△ Boost_PUSCH
    其中，P O_NOMINAL_PUSCH代表所述上行数据信道的期望接收功率，P O_PRE代表所述前导码的期望接收功率，△ PREAMBLE_PUSCH代表所述第一功率参数，△ Boost_PUSCH代表所述第二功率参数。
  8. 根据权利要求2至7中任一项所述的方法，其中，所述方法还包括：
    所述终端重传所述第一消息的情况下，增大所述前导码的功率；
    所述终端基于所述至少一个功率调整参数，以及增大后的所述前导码的功率，确定所述上行数据信道的功率。
  9. 根据权利要求1至8中任一项所述的方法，其中，所述方法还包括：
    所述终端通过以下方式确定所述第一消息的最大发射功率：
    所述终端将所述第一消息中的所述前导码的最大发射功率，作为所述第一消息的最大发射功率；或者，所述终端将所述第一消息中的所述上行数据信道的最大发射功率，作为所述第一消息的最大发射功率。
  10. 根据权利要求1至9中任一项所述的方法，其中，所述方法还包括：
    所述终端通过以下方式确定所述第一消息的最大发射功率：
    所述终端将所述第一消息中的所述前导码的最大发射功率和所述上行数据信道的最大发射功率的最小值，作为所述第一消息的最大发射功率。
  11. 根据权利要求1至10中任一项所述的方法，其中，所述终端接收网络设备发送的第一配置信息，包括：
    终端接收网络设备发送的第一广播消息，所述第一广播消息携带所述第一配置信息；或者，
    终端接收网络设备发送的第一单播消息，所述第一单播消息携带所述第一配置信息。
  12. 根据权利要求1至11中任一项所述的方法，其中，所述第一消息应用于2步随机接入过程。
  13. 一种随机接入方法，所述方法包括：
    终端向网络设备发送第一消息后，接收所述网络设备发送的第二消息，其中，所述第一消息包括前导码和上行数据信道，所述第二消息包括随机接入响应消息和冲突解决信息；
    所述终端基于所述第二消息，确定是否从2步随机接入过程回退到4步随机接入过程。
  14. 根据权利要求13所述的方法，其中，所述第二消息携带第一指示信息，所述第一指示信息用于指示所述终端继续执行2步随机接入过程或者从2步随机接入过程回退到4步随机接入过程。
  15. 根据权利要求14所述的方法，其中，所述随机接入响应消息中的MAC RAR中的保留比特区域携带所述第一指示信息。
  16. 根据权利要求13至15中任一项所述的方法，其中，所述方法还包括：
    所述终端成功接收到所述第二消息的情况下，确定完成2步随机接入过程。
  17. 根据权利要求13至16中任一项所述的方法，其中，所述方法还包括：
    所述终端未成功接收到所述第二消息的情况下，向所述网络设备重传所述第一消息。
  18. 根据权利要求17所述的方法，其中，所述终端未成功接收到所述第二消息，包括：
    所述终端无法解析所述第二消息；或者，
    所述终端在定时器超时前未接收到所述第二消息。
  19. 一种随机接入方法，所述方法包括：
    终端向网络设备发送第一消息后，如果未成功接收到所述网络设备发送的第二消息，则向所述网络设备重传所述第一消息；所述第一消息包括前导码和上行数据信道，所述第二消息包括随机接入响应消息和冲突解决信息；
    如果所述终端向所述网络设备发送所述第一消息的次数达到最大传输次数，所述终端仍未成功接收到所述网络设备发送的第二消息，则所述终端从2步随机接入过程回退到4步随机接入过程。
  20. 根据权利要求19所述的方法，其中，所述方法还包括：
    所述终端接收所述网络设备发送的第二广播消息，所述第二广播消息携带所述第一消息的最大传输次数；或者，
    所述终端接收所述网络设备发送的RRC专有信令，所述RRC专有信令携带所述第一消息的最大传输次数。
  21. 根据权利要求19或20所述的方法，其中，所述未成功接收到所述网络设备发送的第二消息，包括：
    在定时器超时前未接收到所述第二消息。
  22. 一种功率控制装置，所述装置包括：
    接收单元，用于接收网络设备发送的第一配置信息，所述第一配置信息用于确定第一消息中的上行数据信道的功率，其中，所述第一消息包括前导码和所述上行数据信道。
  23. 根据权利要求22所述的装置，其中，所述第一配置信息包括至少一个功率调整参数；所述装置还包括：
    第一确定单元，用于基于所述至少一个功率调整参数，以及所述前导码的功率，确定所述上行数据信道的功率。
  24. 根据权利要求23所述的装置，其中，所述前导码的功率基于所述前导码的最大期望接收功率和所述前导码的抬升值的累计量确定。
  25. 根据权利要求23或24所述的装置，其中，所述至少一个功率调整参数用于确定所述上行数据信道的功率与所述前导码的功率的倍数；
    所述第一确定单元，用于基于所述上行数据信道的功率与所述前导码的功率的倍数，以及所述前导码的功率，确定所述上行数据信道的功率。
  26. 根据权利要求25所述的装置，其中，所述至少一个功率调整参数包括第一功率参数和第二功率参数，所述第一功率参数用于表示所述上行数据信道与所述前导码的比值，所述第二功率参数用于表示所述上行数据信道的抬升值。
  27. 根据权利要求26所述的装置，其中，
    所述第一功率参数用于所述第一消息的上行数据信道的功率控制，以及4步随机接入过程中的上行数据信道的功率控制；
    所述第二功率参数仅用于所述第一消息的上行数据信道的功率控制。
  28. 根据权利要求26或27所述的装置，其中，所述第一确定单元，用于通过以下公式确定所述上行数据信道的期望接收功率：
    P O_NOMINAL_PUSCH＝P O_PRE+△ PREAMBLE_PUSCH+△ Boost_PUSCH
    其中，P O_NOMINAL_PUSCH代表所述上行数据信道的期望接收功率，P O_PRE代表所述前导码的期望接收功率，△ PREAMBLE_PUSCH代表所述第一功率参数，△ Boost_PUSCH代表所述第二功率参数。
  29. 根据权利要求23至28中任一项所述的装置，其中，所述装置还包括：
    调整单元，用于重传所述第一消息的情况下，增大所述前导码的功率；
    所述第一确定单元，用于基于所述至少一个功率调整参数，以及增大后的所述前导码的功率，确定所述上行数据信道的功率。
  30. 根据权利要求22至29中任一项所述的装置，其中，所述装置还包括：
    第二确定单元，用于通过以下方式确定所述第一消息的最大发射功率：将所述第一消息中的所述前导码的最大发射功率，作为所述第一消息的最大发射功率；或者，将所述第一消息中的所述上行数据信道的最大发射功率，作为所述第一消息的最大发射功率。
  31. 根据权利要求22至30中任一项所述的装置，其中，所述装置还包括：
    第三确定单元，用于通过以下方式确定所述第一消息的最大发射功率：将所述第一消息中的所述前导码的最大发射功率和所述上行数据信道的最大发射功率的最小值，作为所述第一消息的最大发射功率。
  32. 根据权利要求22至31中任一项所述的装置，其中，所述接收单元，用于接收网络设备发送的第一广播消息，所述第一广播消息携带所述第一配置信息；或者，接收网络设备发送的第一单播消息，所述第一单播消息携带所述第一配置信息。
  33. 根据权利要求22至32中任一项所述的装置，其中，所述第一消息应用于2步随机接入过程。
  34. 一种随机接入装置，所述装置包括：
    发送单元，用于向网络设备发送第一消息；
    接收单元，用于接收所述网络设备发送的第二消息，其中，所述第一消息包括前导码和上行数据信道，所述第二消息包括随机接入响应消息和冲突解决信息；
    确定单元，用于基于所述第二消息，确定是否从2步随机接入过程回退到4步随机接入过程。
  35. 根据权利要求34所述的装置，其中，所述第二消息携带第一指示信息，所述第一指示信息用于指示所述终端继续执行2步随机接入过程或者从2步随机接入过程回退到4步随机接入过程。
  36. 根据权利要求35所述的装置，其中，所述随机接入响应消息中的MAC RAR中的保留比特区域携带所述第一指示信息。
  37. 根据权利要求34至36中任一项所述的装置，其中，所述确定单元，还用于在所述接收单元成功接收到所述第二消息的情况下，确定完成2步随机接入过程。
  38. 根据权利要求34至37中任一项所述的装置，其中，所述发送单元，还用于在所述接收单元未成功接收到所述第二消息的情况下，向所述网络设备重传所述第一消息。
  39. 根据权利要求38所述的装置，其中，所述接收单元未成功接收到所述第二消息，包括：
    所述接收单元无法解析所述第二消息；或者，
    所述接收单元在定时器超时前未接收到所述第二消息。
  40. 一种随机接入装置，所述装置包括：
    通信单元，用于向网络设备发送第一消息后，如果未成功接收到所述网络设备发送的第二消息，则向所述网络设备重传所述第一消息；所述第一消息包括前导码和上行数据信道，所述第二消息包括随机接入响应消息和冲突解决信息；
    回退单元，用于如果所述通信单元向所述网络设备发送所述第一消息的次数达到最大传输次数，所述通信单元仍未成功接收到所述网络设备发送的第二消息，则从2步随机接入过程回退到4步随机接入过程。
  41. 根据权利要求40所述的装置，其中，所述通信单元，还用于接收所述网络设备发送的第二广播消息，所述第二广播消息携带所述第一消息的最大传输次数；或者，接收所述网络设备发送的RRC专有信令，所述RRC专有信令携带所述第一消息的最大传输次数。
  42. 根据权利要求40或41所述的装置，其中，所述未成功接收到所述网络设备发送的第二消息，包括：
    在定时器超时前未接收到所述第二消息。
  43. 一种终端，包括：处理器和存储器，该存储器用于存储计算机程序，所述处理器用于调用并运行所述存储器中存储的计算机程序，执行如权利要求1至12中任一项所述的方法，或者权利要求13至18中任一项所述的方法，权利要求19至21中任一项所述的方法。
  44. 一种芯片，包括：处理器，用于从存储器中调用并运行计算机程序，使得安装有所述芯片的设备执行如权利要求1至12中任一项所述的方法，或者权利要求13至18中任一项所述的方法，权利要求19至21中任一项所述的方法。
  45. 一种计算机可读存储介质，用于存储计算机程序，所述计算机程序使得计算 机执行如权利要求1至12中任一项所述的方法，或者权利要求13至18中任一项所述的方法，权利要求19至21中任一项所述的方法。
  46. 一种计算机程序产品，包括计算机程序指令，该计算机程序指令使得计算机执行如权利要求1至12中任一项所述的方法，或者权利要求13至18中任一项所述的方法，权利要求19至21中任一项所述的方法。
  47. 一种计算机程序，所述计算机程序使得计算机执行如权利要求1至12中任一项所述的方法，或者权利要求13至18中任一项所述的方法，权利要求19至21中任一项所述的方法。
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2025209341A1 (zh) * 2024-04-03 2025-10-09 维沃移动通信有限公司 传输方法、装置、终端及网络侧设备

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7394835B2 (ja) * 2019-03-27 2023-12-08 パナソニック インテレクチュアル プロパティ コーポレーション オブ アメリカ 端末、通信方法及び集積回路
CN120151999A (zh) * 2023-12-13 2025-06-13 维沃移动通信有限公司 功率抬升方法、装置、终端及网络侧设备

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018064367A1 (en) * 2016-09-28 2018-04-05 Idac Holdings, Inc. Random access in next generation wireless systems
CN108271275A (zh) * 2017-01-04 2018-07-10 电信科学技术研究院 一种竞争随机接入的方法和装置
WO2018151230A1 (ja) * 2017-02-20 2018-08-23 シャープ株式会社 端末装置、基地局装置、通信方法、および、集積回路
US20180279376A1 (en) * 2017-03-23 2018-09-27 Comcast Cable Communications, Llc Power Control For Random Access

Family Cites Families (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101447750B1 (ko) 2008-01-04 2014-10-06 엘지전자 주식회사 랜덤 액세스 과정을 수행하는 방법
EP2252120A4 (en) 2008-03-07 2014-05-14 Nec Corp Radio communication system, communication device, radio communication network system and method therefor
US8494572B2 (en) * 2008-06-24 2013-07-23 Qualcomm Incorporated Method and apparatus for power control of first data transmission in random access procedure of FDMA communication system
CN104469923B (zh) 2009-08-12 2018-06-01 交互数字专利控股公司 Wtru、用于在上行链路物理信道上传送信息的方法和基站
CN102271400B (zh) 2010-06-01 2014-12-10 中兴通讯股份有限公司 一种网络侧设备及其传输路损功率门限配置信息的方法
JP5914918B2 (ja) * 2011-08-02 2016-05-11 シャープ株式会社 基地局、端末および通信方法
CN102958045B (zh) * 2011-08-30 2015-07-08 华为技术有限公司 一种功率控制方法、激活管理方法、用户终端及基站
WO2013047130A1 (ja) * 2011-09-30 2013-04-04 シャープ株式会社 端末、通信システム、基地局および通信方法
JP5990815B2 (ja) * 2011-11-07 2016-09-14 シャープ株式会社 基地局、端末、通信システムおよび通信方法
US9247503B2 (en) * 2012-01-29 2016-01-26 Lg Electronics Inc. Method for controlling uplink transmission power and wireless device using same
CN104254121B (zh) * 2013-06-28 2018-05-29 电信科学技术研究院 一种pusch功率控制方法及装置
CN105393623B (zh) * 2013-07-12 2019-07-05 夏普株式会社 终端装置、方法以及集成电路
EP3021619B1 (en) * 2013-07-12 2023-08-30 Sharp Kabushiki Kaisha Terminal device and method
CN103828447B (zh) * 2013-10-24 2017-09-08 华为技术有限公司 上行功率控制方法和装置
KR102841856B1 (ko) * 2014-01-29 2025-08-01 인터디지탈 패튼 홀딩스, 인크 무선 통신에서의 업링크 송신
KR102391121B1 (ko) * 2014-01-29 2022-04-27 인터디지탈 패튼 홀딩스, 인크 커버리지 향상 무선 송신을 위한 액세스 및 링크 적응 방법
US10433291B2 (en) 2016-02-26 2019-10-01 Qualcomm Incorporated Discovery reference signal transmission window detection and discovery reference signal measurement configuration
CN108282899B (zh) 2017-01-05 2020-03-06 电信科学技术研究院 一种两步竞争随机接入方法和装置
CN108282901B (zh) 2017-01-06 2019-08-09 电信科学技术研究院 一种随机接入响应方法和装置
US10548096B2 (en) * 2017-04-21 2020-01-28 Samsung Electronics Co., Ltd. Information type multiplexing and power control
EP3617348B1 (en) 2017-04-24 2025-06-18 Sumitomo Electric Industries, Ltd. Oxide-dispersed metal porous body, electrolysis electrode, and hydrogen generation apparatus
US11251915B2 (en) * 2017-05-15 2022-02-15 Qualcomm Incorporated Techniques for uplink transmissions
US10873916B2 (en) * 2017-12-29 2020-12-22 Ofinno, Llc Base station power control
CN110035485B (zh) * 2018-01-11 2022-11-22 华为技术有限公司 上行信息的传输方法和装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018064367A1 (en) * 2016-09-28 2018-04-05 Idac Holdings, Inc. Random access in next generation wireless systems
CN108271275A (zh) * 2017-01-04 2018-07-10 电信科学技术研究院 一种竞争随机接入的方法和装置
WO2018151230A1 (ja) * 2017-02-20 2018-08-23 シャープ株式会社 端末装置、基地局装置、通信方法、および、集積回路
US20180279376A1 (en) * 2017-03-23 2018-09-27 Comcast Cable Communications, Llc Power Control For Random Access

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
CAICT: "A Scheme of Fallback from 2-step RACH to 4-step RACH", 3GPP TSG RAN WG1 MEETING #96 R1-1702818, 15 February 2019 (2019-02-15), XP051600616, DOI: 20191105114539X *
See also references of EP3920643A4 *
ZTE: "Summary of 7.2.1.2 Procedure for Two-step RACH", 3GPP TSG RAN WG1 #96 R1-1903436, 3 March 2019 (2019-03-03), XP051690820, DOI: 20191105114613X *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2025209341A1 (zh) * 2024-04-03 2025-10-09 维沃移动通信有限公司 传输方法、装置、终端及网络侧设备

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