WO2020191599A1 - 通信方法、终端设备和网络设备 - Google Patents

通信方法、终端设备和网络设备 Download PDF

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Publication number
WO2020191599A1
WO2020191599A1 PCT/CN2019/079592 CN2019079592W WO2020191599A1 WO 2020191599 A1 WO2020191599 A1 WO 2020191599A1 CN 2019079592 W CN2019079592 W CN 2019079592W WO 2020191599 A1 WO2020191599 A1 WO 2020191599A1
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Prior art keywords
random access
access process
terminal device
step random
indication information
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PCT/CN2019/079592
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English (en)
French (fr)
Inventor
石聪
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北京欧珀通信有限公司
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Priority to CN201980091411.7A priority Critical patent/CN113678562B/zh
Priority to PCT/CN2019/079592 priority patent/WO2020191599A1/zh
Publication of WO2020191599A1 publication Critical patent/WO2020191599A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W74/00Wireless channel access
    • H04W74/08Non-scheduled access, e.g. ALOHA

Definitions

  • the embodiments of the present application relate to the field of communication technologies, and specifically relate to a communication method, terminal device, and network device.
  • terminal equipment can access the network through a random access process.
  • the embodiments of the present application provide a communication method, terminal device, and network device, which can reduce the communication delay of the random access process and increase the success rate of random access in the random access process.
  • a communication method which includes: a terminal device performs a 2-step random access process and a 4-step random access process in parallel; after passing the 2-step random access process and the 4-step random access process In the case that one of the random access processes in the process achieves successful access, the terminal device stops another ongoing random access process.
  • a communication method which includes: when a random access process of a 2-step random access process and a 4-step random access process performed by a terminal device achieves successful access, the network device executes At least one of the following operations: stop another random access process in progress, and/or send first indication information in a random access process for achieving successful access, where the first indication information is used to indicate all The terminal device stops another random access procedure.
  • a terminal device for executing the method in the first aspect.
  • the terminal device includes a functional module for executing the method in the foregoing first aspect.
  • a network device for executing the method in the second aspect.
  • the network device includes a functional module for executing the method in the above second aspect.
  • a communication device including a processor, a memory, and a transceiver.
  • 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 control the transceiver to execute the method in the first aspect or the second aspect.
  • a chip is provided for implementing the method in the first or second aspect.
  • 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 method in the first aspect or the second aspect through the transceiver.
  • a computer-readable storage medium for storing a computer program that enables a computer to execute the method in the first aspect or the second aspect through a transceiver.
  • a computer program product including computer program instructions that cause a computer to execute the method in the first aspect or the second aspect through a transceiver.
  • a computer program which when running on a computer, causes the computer to execute the method in the first aspect or the second aspect through a transceiver.
  • the terminal device performs the 2-step random access process and the 4-step random access process in parallel, if one of the random access processes achieves successful access, the other ongoing random access process is stopped , Can increase the success rate of access and reduce the delay of successful access.
  • Fig. 1 is a schematic diagram of a communication system architecture provided by an embodiment of the present application.
  • Figure 2 is a schematic diagram of a 4-step random access process.
  • Figure 3 is a schematic diagram of a 2-step random access procedure.
  • FIG. 4 is a schematic diagram of a random access response (Random Access Response, RAR) structure.
  • Figure 5 is a schematic diagram of the RAR structure.
  • Figure 6 is a schematic diagram of the RAR structure.
  • Figure 7 is a schematic diagram of the RAR structure.
  • Fig. 8 is a schematic flowchart of a communication method according to an embodiment of the present application.
  • Fig. 9 is a schematic flowchart of another communication method according to an embodiment of the present application.
  • Fig. 10 is a schematic block diagram of a terminal device according to an embodiment of the present application.
  • Fig. 11 is a schematic block diagram of a network device according to an embodiment of the present application.
  • Fig. 12 is a schematic block diagram of a communication device according to an embodiment of the present application.
  • Fig. 13 is a schematic block diagram of a communication device according to 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 device 120 (or called a communication terminal or terminal).
  • the network device 110 may provide communication coverage for a specific geographic area, and may communicate with terminal devices 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 device 120 located within the coverage area of the network device 110.
  • the "terminal equipment” used here includes but is not limited to connection via wired lines, such as via 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 device that is set to receive/send communication signals; and/or Internet of Things (IoT) equipment.
  • PSTN public switched telephone networks
  • DSL Digital Subscriber Line
  • DSL Digital Subscriber Line
  • DSL Digital Subscriber Line
  • DSL Digital Subscriber Line
  • DSL Digital Subscriber Line
  • DSL Digital Subscriber Line
  • DSL Digital Subscriber Line
  • DSL Digital Subscriber Line
  • DSL Digital Subscriber Line
  • DSL Digital Subscriber Line
  • DSL
  • a terminal device 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 equipment can refer to access terminals, user equipment (UE), user units, user stations, mobile stations, mobile stations, remote stations, remote terminals, mobile equipment, user terminals, terminals, wireless communication equipment, user agents, 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, terminal devices in 5G networks, or terminal devices in the future evolution of PLMN, etc.
  • SIP Session Initiation Protocol
  • WLL Wireless Local Loop
  • PDA Personal Digital Assistant
  • direct terminal connection (Device to Device, D2D) communication may be performed between the terminal devices 120.
  • the 5G system or 5G network may also be referred to as a New Radio (NR) system or NR network.
  • NR New Radio
  • Figure 1 exemplarily shows one network device and two terminal devices.
  • the communication system 100 may include multiple network devices and the coverage of each network device may include other numbers of terminal devices. The embodiment does not limit 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 device 120 with communication functions, and the network device 110 and the terminal device 120 may be the specific devices described above, which will not be repeated here.
  • the communication 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 this embodiment of the application.
  • terminal equipment can access the network through a random access process.
  • the usual random access process can be divided into a 4-step random access process and a 2-step random access process.
  • Figure 2 shows a schematic diagram of a 4-step random access procedure.
  • the terminal device sends a message 1 (MSG1, which may be called the first message in the 4-step random access process) to the network device.
  • MSG1 may include a random access preamble.
  • the terminal device can select physical random access channel (Physical Random Access Channel, PRACH) resources (including time domain resources and frequency domain resources) and random access preamble (preamble), and can send the selection on the selected PRACH resource Random access preamble.
  • PRACH Physical Random Access Channel
  • the terminal device can select the PRACH resource from the PRACH resource set, and can select the random access preamble from the random access preamble set.
  • the network device may send message 2 (MSG2, which may be referred to as the second step message in the 4-step random access process) to the terminal device.
  • MSG2 message 2
  • the terminal device can receive the MSG2.
  • the MSG2 may include a random access response message (Random Access Response, RAR).
  • the network device may estimate the uplink timing based on the random access preamble carried in the MSG1, and estimate the uplink resources required by the terminal device for MSG3 transmission, and send MSG2 based on this.
  • MSG2 may include a physical downlink control channel (Physical Downlink Control Channel, PDCCH) and a physical downlink shared channel (Physical Downlink Shared Channel, PDSCH).
  • PDCCH Physical Downlink Control Channel
  • PDSCH Physical Downlink Shared Channel
  • the PDCCH may be scrambled by a random access radio network temporary identity (Random Access Radio Network Temporary Identity, RA-RNTI), and the RA-RNTI may be obtained by sending a random access preamble with a terminal device to a selected time-frequency resource.
  • RA-RNTI Random Access Radio Network Temporary Identity
  • the RA-RNTI can be calculated through but not limited to the following formula 1:
  • RA-RNTI 1+s_id+14 ⁇ t_id+14 ⁇ 80 ⁇ f_id+14 ⁇ 80 ⁇ 8 ⁇ ul_carrier_id formula 1
  • s_id represents the subframe ID of the selected time-frequency resource
  • t_id represents the symbol ID of the selected time-frequency resource
  • f_id represents the frequency domain ID of the selected time-frequency resource
  • ul_carrier_id represents the uplink of the selected time-frequency resource Carrier ID.
  • the PDCCH sent by the network device may be used to schedule PDSCH, and the PDSCH may include RAR.
  • the structure of PAR can be as shown in Figures 4 to 7.
  • the Media Access Control (MAC) protocol data unit (Protocol Data Unit, PDU) sent in the second step message may include multiple sub-PDUs (ie, MAC sub-PDU1, MAC sub-PDU2, Up to the MAC sub-PDUn), each sub-PDU may include a sub-header, and may further include MAC RAR and so on.
  • the subheader of the RAR may include a random access backoff index (Backoff index, BI), which is used to indicate the backoff time for retransmitting the first step message.
  • BI random access backoff index
  • the subheader of the RAR includes an RAR Identity (RARID), and the RARID is used for the index of the random access preamble that the network device responds to.
  • RARID RAR Identity
  • the load of the RAR can include a Timing Advance Command field for adjusting uplink timing, uplink grant (UL Grant) field, and temporary cell radio network temporary identity (Temporary Cell Radio Network Temporary Identity, TC-RNTI) and so on.
  • UL Grant uplink grant
  • TC-RNTI temporary cell radio network temporary identity
  • E in Figures 4-7 is an extended bit, indicating whether the MAC sub-PDU containing the MAC sub-header is the last MAC sub-PDU.
  • T represents whether the MAC subheader contains RAPID or a backoff indication.
  • the R bit is a reserved bit.
  • a RAR listening window can be started, the terminal device can listen to the PDCCH in this window, and the terminal device can use the RA-RNTI to descramble the PDCCH. And based on the PDCCH obtained by descrambling, the scheduled PDSCH is obtained.
  • the terminal device sends a message 3 (MSG3, which may be referred to as the third step message in the 4-step random access process) to the network device. Accordingly, the network device can receive the MSG3 sent by the terminal device.
  • the MSG3 may include a radio resource control (Radio Resource Control, RRC) message.
  • RRC Radio Resource Control
  • the terminal device may message 3 to the network device based on the resource authorization in MSG2.
  • the message 3 can notify the network device of the trigger event that the terminal device triggers random access.
  • the terminal device can also carry identification information in MSG3, for example, Cell Radio Network Temporary Identity (C-RNTI), 5G SAE Temporary Mobile Identity (5G SAE Temporary Mobile Station Identifier, 5G-S- TMSI) or C-RNTI and short-integrity message authentication code (Short MAC-I (Message Authentication Code Integrity, MAC-I)), etc.
  • C-RNTI Cell Radio Network Temporary Identity
  • 5G SAE Temporary Mobile Identity 5G SAE Temporary Mobile Station Identifier
  • 5G-S- TMSI 5G-S- TMSI
  • Short MAC-I Short MAC-I (Message Authentication Code Integrity, MAC-I)
  • the identification information may be 5G-S-TMSI, and in the random access process triggered by RRC reestablishment, the identification information may be C-RNTI and Short MAC-I.
  • the identification information can be carried in the fourth step message so that the contention conflict is resolved, that is, the terminal device realizes successful access.
  • the network device sends a message 4 (MSG4, which may be referred to as the fourth step message in the 4-step random access process) to the terminal device, and correspondingly, the terminal device receives MSG4 sent by the network device.
  • SMSG4 message 4
  • the network device may send MSG4 to the terminal device.
  • the MSG4 may include the identification information carried in the MSG3 by the terminal device and the RRC reconfiguration message.
  • a timer for example, a contention resolution timer
  • a contention resolution timer For the terminal device, after sending the MSG3, a timer (for example, a contention resolution timer) can be started to listen to the MSG4.
  • MSG4 can be used to achieve the resolution of competition conflicts, where the resolution of competition conflicts can be achieved in the following ways.
  • Method 2 If the terminal equipment does not carry C-RNTI in MSG3, such as random access triggered by initial access, MSG4 uses TC-RNTI scrambled PDCCH scheduling; conflict resolution can be received by terminal equipment in MSG4
  • the PDSCH achieves conflict resolution by matching the common control channel (CCCH) service data unit (Service Data Unit, SDU) in the PDSCH.
  • CCCH common control channel
  • SDU Service Data Unit
  • Table 1 shows the content that each step of the message needs to carry in the four-step random access process in the random access scenario triggered by multiple events.
  • Figure 3 shows a schematic diagram of a 2-step random access procedure.
  • the terminal device can send a message A (MSGA) to the network device, and the network device can receive the message A accordingly.
  • MSGA message A
  • the MSGA can be composed of a random access preamble and a load part, and the load part can carry information in MSG3 in the aforementioned 4-step random access process. For example, RRC signaling when the terminal device is in the idle state, or C-RNTI when the RRC is in the connected state, etc.
  • the load part in MSGA can be carried by a physical uplink shared channel (PUSCH).
  • PUSCH physical uplink shared channel
  • the network device can send the MSGB to the terminal device, and the terminal device can receive the MSGB sent by the network device.
  • MSGB can include the contents of MSG2 and MSG4 in the above 4-step random process.
  • the network device After successfully parsing the MSGA, the network device can send the MSGB to the terminal device, thereby realizing the resolution of the contention conflict.
  • the network device receiving MSGA can be one of the following situations:
  • Case 1 The network device successfully decodes the random access preamble
  • Case 2 The network device successfully decodes the random access preamble and load part
  • Case 3 The network device successfully decodes the load part, but fails to decode the random access preamble.
  • the network device can send MSGB to the terminal device.
  • the terminal device can fall back to the 4-step random access process when the 2-step random access process does not achieve successful access, which will increase the time delay for successful access.
  • the embodiments of the present application provide the following solutions, which can solve the above-mentioned delay problem.
  • FIG. 8 is a schematic flowchart of a communication method 400 according to an embodiment of the present application.
  • the method 400 includes at least part of the following content.
  • the terminal device performs a 2-step random access process and a 4-step random access process in parallel.
  • the terminal device stops another ongoing random access process. Into the process.
  • the terminal device since the terminal device performs a 2-step random access process and a 4-step random access process in parallel, if one of the random access processes achieves successful access, the other random access process in progress can be stopped. Increase the success rate of access and reduce the delay of successful access.
  • FIG. 9 is a schematic flowchart of a communication method 500 according to an embodiment of the present application.
  • the method 500 includes at least part of the following content.
  • the network device when a random access process of the 2-step random access process and the 4-step random access process performed by the terminal device in parallel achieves successful access, the network device performs at least one of the following operations:
  • the terminal device since the terminal device performs the 2-step random access process and the 4-step random access process in parallel, if one of the random access processes achieves successful access, the other random access process in progress can be stopped. Increase the success rate of access and reduce the delay of successful access.
  • the parallelism in the 2-step random access process and the 4-step random access process mentioned in the embodiment of this application may mean that the two random access processes overlap at least partially in time.
  • the starting points of the 2-step random access process and the 4-step random access process may be the same, or, may also be different, such as a certain time length difference.
  • the terminal device When the terminal device performs the 2-step random access process and the 4-step random access process in parallel, it is possible to achieve successful access through the 2-step random access process, while the 4-step random access process is still in progress.
  • the terminal device may be in any of the following processes:
  • the terminal device can be in any of the above processes.
  • the terminal device can terminate any of the above-mentioned ongoing processes in the 4-step random access process.
  • the successful access may be the 4-step random access process, and the 2-step random access process is still in progress.
  • the terminal device may be in any of the following processes:
  • the terminal device can be in any of the above processes.
  • the terminal device can terminate any ongoing process in the above 2-step random access process.
  • the network device may be in any of the following processes:
  • the network device can be in any of the above processes.
  • the network device can terminate any of the above-mentioned ongoing processes in the 4-step random access process.
  • the successful access may be the 4-step random access process, and the 2-step random access process is still in progress.
  • the network device may be in any of the following processes:
  • the network device can be in any of the above processes.
  • the network device can terminate any of the foregoing ongoing processes in the 2-step random access process.
  • the network device can also actively stop another random access procedure of the terminal device.
  • the network device can also further The last step of a random access process to achieve successful access carries the first indication information to instruct the terminal device to stop another random access process.
  • the first indication information can be carried in the 2-step random access process In the second step of the message, or carried in the fourth step of the 4-step random access process.
  • the network device may only send the first indication information without actively stopping the ongoing random access process of the terminal device, and the terminal device implements the stopping of the ongoing random access process.
  • the network device may only actively stop the ongoing random access process without sending the first indication information.
  • the terminal device can continue another random access process at this time, thereby increasing the success rate of random access.
  • one of the random access procedures achieves an access failure, and the other random access procedure is in progress, and the terminal device can re-initiate the random access procedure that failed to access.
  • the terminal device may not re-initiate the random access process, but wait for the result of the other random access process. If the other random access process does not achieve successful access, the random access process may be initiated again , The random access process initiated again can be a parallel 2-step random access process and a 4-step random access process.
  • the 2-step random access process is in progress.
  • the terminal device sends the message 1 of the 4-step random access process, if MSG2 is not heard in the listening window, the 4-step random access process can fail.
  • the terminal device can re-initiate the 4-step random access process, that is, message 1 can be retransmitted.
  • the terminal device can also wait for the result of the 2-step random access process. If the 2-step random access process does not achieve successful access, the random access process can be initiated again, and the random access process initiated again can be parallel. 2-step random access process and 4-step random access process.
  • the random access process can be retransmitted (wherein, retransmitting the random access process may refer to repeating the random access process), the 2-step random access process and the 4-step random access process mentioned in the embodiment of this application All random access procedures can be retransmitted.
  • the terminal device can perform a 2-step random access process and a 4-step random access process in parallel. If the 4-step random access process fails, the 2-step random access process If it is in progress, the terminal device can re-initiate the 4-step random access process. After re-initiating the 4-step random access process, the 2-step random access process fails, and the re-initiated 4-step random access process is in progress. The device can re-initiate the 2-step random access process, and so on, until the 2-step random access process and the 4-step random access process reach their respective maximum retransmission times, or until the 2-step random access process and the 4-step random access process respectively. In the random access process, there is a random access process to achieve successful access.
  • the maximum retransmission times of the 2-step random access process and the 4-step random access process can be determined by Network device configuration, or network device configuration with a maximum number of retransmissions, respectively, as the maximum number of retransmissions for the 2-step random access process and the 4-step random access process.
  • the maximum number of retransmissions may be the sum of the number of retransmissions of the allowed 2-step random access process and the 4-step random access process.
  • the maximum number of retransmissions is 8
  • the sum of the retransmissions of the 2-step random access process and the 4-step random access process is not allowed to exceed 8.
  • the 4-step random access process is retransmitted 5 times
  • the 2-step random access process After the entry process is retransmitted 3 times, the maximum number of retransmissions is reached, and the terminal device is no longer allowed to retransmit the random access process. For example, it may wait for a period of time before performing random access.
  • the first step message in the 2-step random access process includes a first random access preamble and a first load part, wherein the message is sent in the 2-step random access process
  • the first random access preamble is multiplexed as the random access preamble in the first step message in the 4-step random access process.
  • the random access preamble sent once can be used as the random access preamble of the 2-step random access process
  • the code is also used as the preamble of the 4-step random access process.
  • the random access preamble in the 2-step random access process and the random access preamble in the 4-step random access process can be the same random access preamble sent on the same PRACH resource , Which can save random access resources.
  • the terminal device further sends the load part in the first step message.
  • the terminal device can open the first frame listening window for frame listening to the second step message in the 4-step random access process
  • the terminal device may monitor the RA-RNTI scrambled PDCCH to receive the RAR within the listening window, and if the subsequent correct RAR is received, it transmits Msg3 and starts the contention resolution timer to monitor Msg4.
  • the terminal device can open a second frame listening window for frame listening to the second step message in the 2-step random access process .
  • the terminal device can use the RA-RNTI scrambled PDCCH (if the first step message does not contain C-RNTI) or the C-RNTI scrambled PDCCH (if the second step message contains C-RNTI) in the listening window.
  • -RNTI is used to receive the second step message.
  • the second step message in the 2-step random access process can be sent for the random access preamble, and after parsing the first load part, you can Send the second step message in the 4-step random access process.
  • the first step message in the 2-step random access process includes a second random access preamble and a second load part
  • the first step in the 4-step random access process includes a third random access preamble, and the second random access preamble and the third random access preamble are sent separately.
  • the terminal device can respectively send random access preambles for the 2-step random access process and the 4-step random access process, that is, the second random access preamble and the third random access preamble.
  • the random access preamble and the third random access preamble may be the same or different.
  • the terminal device After the second random access preamble and the second load part have been sent, the terminal device opens a third frame listening window for frame listening to the second step in the 2-step random access process news.
  • the terminal device may monitor the RA-RNTI scrambled PDCCH to receive the RAR within the listening window, and if the subsequent correct RAR is received, it transmits Msg3 and starts the contention resolution timer to monitor Msg4.
  • the terminal device After the transmission of the third random access preamble is completed, the terminal device opens a fourth frame listening window for frame listening to the second step message in the 4-step random access process.
  • the terminal device can use the RA-RNTI scrambled PDCCH (if the first step message does not contain C-RNTI) or the C-RNTI scrambled PDCCH (if the second step message contains C-RNTI) in the listening window.
  • -RNTI is used to receive the second step message.
  • the second step message in the 2-step random access process can be sent, and after the third random access preamble is analyzed , You can send the second step message in the 4-step random access process.
  • the terminal device can send the random access preamble and the load part, and the network device only sends the second part of the 2-step random access process after analyzing the random access preamble and the load part. The second step in the 4-step random access process is no longer sent.
  • the terminal device can perform a 2-step random access process and a 4-step random access process in parallel during random access under any circumstances.
  • the 2-step random access process and the 4-step random access process can be performed in parallel only when certain conditions are met.
  • the terminal device when the state of the terminal device satisfies a specific state and/or the event triggering random access is a specific event, the terminal device performs a 2-step random access process and a 4-step random access process in parallel.
  • the terminal device performs a 2-step random access process and a 4-step random access process in parallel.
  • the terminal device performs a 2-step random access process and a 4-step random access process in parallel.
  • the terminal device when the state of the terminal device is a specific state and the event that triggers the random access is a specific event, the terminal device performs a 2-step random access event and a 4-step random access event.
  • the state of the terminal device mentioned in the embodiment of the present application may be an idle state, a connected state, an inactive state, and so on.
  • the specific state may include at least one of the following: a connected state, an idle state, and an inactive state.
  • the event used to trigger random access may be any of the following:
  • RRC Connection Re-establishment procedure RRC Connection Re-establishment procedure
  • the uplink or downlink data during the RRC connected state arrives (DL or UL data arrival during RRC_CONNECTED when UL synchronisation status is "non-synchronised");
  • Request for other system information (Request for Other SI).
  • the above trigger events can be further subdivided.
  • random access triggered by data arrival during the RRC connected state can also be classified into random access triggered by scheduling requests (Scheduling Request, SR) of different logical channels.
  • SR scheduling Request
  • the terminal device may perform a 2-step random access process and a 4-step random access process in parallel.
  • the specific event may be initial access or triggering SR by a specific logical channel.
  • the specific logical channel in the embodiment of the present application may be a logical channel of a specific service.
  • the specific service in the embodiment of the present application may be a higher priority service, for example, it may be a URLLC service.
  • the conditions to be met for the parallel 2-step random access process and 4-step random access process mentioned above may be preset on the terminal device. It can also be configured by a network device.
  • the network device may send second instruction information to the terminal device, and the terminal device receives the second instruction information sent by the network device; wherein, the second instruction information indicates:
  • the various states of the terminal device are the states required for the terminal device to perform a 2-step random access process and a 4-step random access process in parallel, and/or whether each event that triggers random access triggers the terminal
  • the device performs a 2-step random access process and a 4-step random access process in parallel.
  • the network device can configure the aforementioned specific state and/or specific event to the terminal device, that is, the network device can directly inform the terminal device which is the aforementioned specific state and/or specific event.
  • the network device may also configure the terminal device with each state and/or whether each event that triggers random access can trigger a 2-step random access process and a 4-step random access process in parallel.
  • the second indication information is carried in a system message or radio resource control RRC dedicated signaling.
  • a network device may send a system message, and the system message may indicate which RRC state of the terminal device the terminal device can perform a 2-step random access process and a 4-step random access process in parallel.
  • the network device can indicate through RRC dedicated signaling whether the terminal device with the ability to perform the 2-step random access process and the 4-step random access process in parallel in the connected state is allowed to perform the 2-step random access process and the 4-step random access process in parallel. process.
  • the network device can indicate which logical channel SRs allow parallel 2-step random access procedures and 4-step random access procedures.
  • logical channels that allow URLLC services can trigger parallel 2-step random access procedures and 4-step random access procedures. Access process.
  • the network device uses RRC dedicated signaling (for example, an RRC connection release message) when the terminal device is suspended to indicate whether the terminal device with parallel random access capability is allowed the next time the connection recovery is triggered Initiate parallel 4-step random access process and 2-step random access process.
  • RRC dedicated signaling for example, an RRC connection release message
  • the terminal device may send a system message to instruct the terminal device to perform a 2-step random access process and a 4-step random access process when subsequent access is performed.
  • the random access process can be performed in parallel.
  • the random access resources used for the 2-step random access process and the 4-step random access process may be configured by the network equipment respectively.
  • the random access resources mentioned in the embodiments of this application may include PRACH resources (also referred to as RACH opportunities (RACH Occasion, RO)) and random access preambles.
  • PRACH resources also referred to as RACH opportunities (RACH Occasion, RO)
  • RACH Occasion, RO random access preambles
  • the network equipment can configure the PRACH resource set and the random access preamble set for the 4-step random access process and the 2-step random access process, respectively.
  • the network device may configure a shared PRACH resource set/or a shared random access preamble set for the 4-step random access process and the 2-step random access process.
  • the terminal device may have the same random access preamble set and/or the same PRACH resource set.
  • the terminal device when the terminal device selects the PRACH resource, the SSB may be measured, and the PRACH resource may be selected according to the measurement result of the SSB. That is, there is a corresponding relationship between the SSB measurement result and the PRACH resource, and the PRACH resource can be selected according to the corresponding relationship and the SSB measurement result.
  • the range of one SSB measurement result may correspond to multiple PRACH resources, that is, when the measurement result of the SSB is within the range, the terminal device may select PRACH resources from the multiple PRACH resources.
  • one of the PRACH resource and the random access preamble used for sending the first step message can be the same.
  • the PRACH resources of the 2-step random access process and the 4-step random access process are the same, but the random access preamble is different.
  • the PRACH resources of the 2-step random access process and the 4-step random access process are different, but the random access preamble is the same.
  • the random access resources may also include PUSCH resources, and the PUSCH resources may be used to send the first step message in the 2-step random access process Part of the load.
  • the terminal device may configure random access resources for one of the random access procedures, and may indicate and use part of the random access resources configured in the random access procedure as another A random access resource for a random access process.
  • the network device may send third instruction information to the terminal device, and the terminal device receives the third instruction information sent by the network device, and the third instruction information indicates the first step of the 2-step random access process.
  • a random access resource the network device may send fourth indication information to the terminal device, the terminal device receives the fourth indication information sent by the network device, and the fourth indication information indicates that the first random access resource Part of the resources in is used as the second random access resource in the 4-step random access process.
  • the fourth indication information indicates that the partial resources are used as the second random access resources in the following manner: configuring corresponding physical uplink shared channel PUSCH resources for other partial resources in the first random access resources, And the corresponding PUSCH resources are not configured for the partial resources.
  • the fourth indication may also indicate that the part of the resource is used as the second random access resource in other ways, for example, the part of the resource may be indicated as the second random access resource in a display manner.
  • the network device may also configure random access resources for the 4-step random access process and the 2-step random access process respectively.
  • the terminal device since the terminal device performs the 2-step random access process and the 4-step random access process in parallel, in the case that one of the random access processes achieves successful access, the other ongoing process is stopped.
  • the random access process can increase the success rate of access and reduce the time delay of successful access.
  • FIG. 10 is a schematic block diagram of a terminal device 600 according to an embodiment of the present application.
  • the terminal device 600 includes a random access unit 610.
  • the random access unit 610 is configured to: perform a 2-step random access process and a 4-step random access process in parallel; and perform one random access process in the 2-step random access process and the 4-step random access process. In the case of successful access in the access process, stop another ongoing random access process.
  • the random access unit 610 is further configured to:
  • the first step message in the 2-step random access process includes a first random access preamble and a first load part, wherein, in the 2-step random access process The first random access preamble sent in is multiplexed as the random access preamble in the first step message in the 4-step random access process.
  • the random access unit 610 is further configured to:
  • the first frame listening window is opened for frame listening to the second step message in the 4-step random access process
  • a second frame listening window is opened for frame listening to the second step message in the 2-step random access process.
  • the first step message in the 2-step random access process includes a second random access preamble and a second load part
  • the first step in the 4-step random access process includes a third random access preamble, and the second random access preamble and the third random access preamble are sent separately.
  • the random access unit 610 is further configured to:
  • a third frame listening window is opened for frame listening to the second step message in the 2-step random access process
  • the fourth frame listening window is opened for frame listening to the second step message in the 4-step random access process.
  • the last step message of a random access process for achieving successful access carries first indication information, and the first indication information is used to instruct to stop another random access process;
  • the random access unit 610 is further configured to:
  • the random access unit 610 is further configured to:
  • the specific event is:
  • a scheduling request for a specific logical channel or
  • the terminal device 600 further includes a receiving unit 620, configured to:
  • the various states of the terminal device are the states required for the terminal device to perform a 2-step random access process and a 4-step random access process in parallel, and/or whether each event that triggers random access triggers the terminal
  • the device performs a 2-step random access process and a 4-step random access process in parallel.
  • the second indication information is carried in a system message or radio resource control RRC dedicated signaling.
  • the terminal device 600 further includes a receiving unit 620, configured to:
  • the fourth indication information indicates that the partial resources are used as the second random access resources in the following manner:
  • the corresponding physical uplink shared channel PUSCH resource is configured for other partial resources in the first random access resource, and the corresponding PUSCH resource is not configured for the partial resource.
  • terminal device 600 may be used to implement the corresponding operations implemented by the terminal device in the foregoing method embodiments, and for brevity, details are not described herein again.
  • FIG. 11 is a schematic block diagram of a network device 700 according to an embodiment of the present application.
  • the network device 700 includes a random access unit 710 for:
  • the first step message in the 2-step random access process includes a first random access preamble and a first load part, wherein, in the 2-step random access process The first random access preamble transmitted in is multiplexed as the random access preamble in the first step message in the 4-step random access process.
  • the first step message in the 2-step random access process includes a second random access preamble and a second load part
  • the first step in the 4-step random access process includes a third random access preamble, and the second random access preamble and the third random access preamble are transmitted separately.
  • the network device 700 further includes a sending unit 720, configured to:
  • the second indication information indicates at least one of the following:
  • the various states of the terminal device are the states required for the terminal device to perform a 2-step random access process and a 4-step random access process in parallel;
  • each event that triggers random access triggers the terminal device to perform a 2-step random access process and a 4-step random access process in parallel.
  • the second indication information is carried in a system message or radio resource control RRC dedicated signaling.
  • the network device 700 further includes a sending unit 720, configured to:
  • Send fourth indication information where the fourth indication information indicates that part of the resources in the first random access resource is used as the second random access resource of the 4-step random access process.
  • the fourth indication information indicates that the partial resources are used as the second random access resources in the following manner:
  • Corresponding PUSCH resources are configured for other partial resources in the first random access resource, and corresponding PUSCH resources are not configured for the partial resources.
  • network device 700 may be used to implement the corresponding operations implemented by the network device in the foregoing method embodiments, and for brevity, details are not described herein again.
  • FIG. 12 is a schematic structural diagram of a communication device 800 provided by an embodiment of the present application.
  • the communication device 800 shown in FIG. 12 includes a processor 810, and the processor 810 can call and run a computer program from the memory to implement the method in the embodiment of the present application.
  • the communication device 800 may further include a memory 820.
  • the processor 810 can call and run a computer program from the memory 820 to implement the method in the embodiment of the present application.
  • the memory 820 may be a separate device independent of the processor 810, or may be integrated in the processor 810.
  • the communication device 800 may further include a transceiver 830, and the processor 810 may control the transceiver 830 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 830 may include a transmitter and a receiver.
  • the transceiver 830 may further include an antenna, and the number of antennas may be one or more.
  • the communication device 800 may specifically be a network device in an embodiment of the present application, and the communication device 800 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 800 may specifically be a mobile terminal/terminal device of an embodiment of the present application, and the communication device 800 may implement the corresponding process implemented by the mobile terminal/terminal device in each method of the embodiment of the present application. For simplicity , I won’t repeat it here.
  • FIG. 13 is a schematic structural diagram of a communication device according to an embodiment of the present application.
  • the communication device 900 shown in FIG. 13 includes a processor 910, and the processor 910 can call and run a computer program from the memory to implement the method in the embodiment of the present application.
  • the communication device 900 may further include a memory 920.
  • the processor 910 may call and run a computer program from the memory 920 to implement the method in the embodiment of the present application.
  • the memory 920 may be a separate device independent of the processor 910, or may be integrated in the processor 910.
  • the communication device 900 may further include an input interface 930.
  • the processor 910 may control the input interface 930 to communicate with other devices or communication devices, and specifically, may obtain information or data sent by other devices or communication devices.
  • the communication device 900 may further include an output interface 940.
  • the processor 910 can control the output interface 940 to communicate with other devices or communication devices, and specifically, can output information or data to other devices or communication devices.
  • the communication device may be applied to the network device in the embodiment of the present application, and the communication device may implement the corresponding process implemented by the network device in each method of the embodiment of the present application.
  • the communication device may implement the corresponding process implemented by the network device in each method of the embodiment of the present application.
  • the communication device can be applied to the mobile terminal/terminal device in the embodiment of this application, and the communication device can implement the corresponding process implemented by the mobile terminal/terminal device in each method of the embodiment of this application. For simplicity, I won't repeat them here.
  • the communication device mentioned in the embodiment of the present application may be a chip, and the chip may also be called a system-on-chip, a system-on-chip, a system-on-chip, or a system-on-chip.
  • 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 aforementioned 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 ready-made 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
  • SDRAM double data rate synchronous dynamic random access memory
  • Double Data Rate SDRAM DDR SDRAM
  • ESDRAM enhanced synchronous dynamic random access memory
  • Synchlink DRAM SLDRAM
  • 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 dynamic random access memory (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 device in the embodiment of the present application, and the computer program enables the computer to execute the corresponding process implemented by the mobile terminal/terminal device in each method of the embodiment of the present application ,
  • the computer program enables the computer to execute the corresponding process implemented by the mobile terminal/terminal device in each method of the embodiment of the present application ,
  • I will not 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 device 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 device in each method of the embodiment of the present application, For brevity, I won't repeat them 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 device in the embodiment of the present application.
  • the computer program runs on the computer, the computer executes each method in the embodiment of the present application. For the sake of brevity, the corresponding 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通信方法、终端设备和网络设备,可以降低随机接入过程的通信时延以及提高随机接入过程中随机接入的成功率。该方法包括:终端设备并行进行2步随机接入过程和4步随机接入过程;在通过所述2步随机接入过程和所述4步随机接入过程中的一个随机接入过程实现成功接入的情况下,所述终端设备停止正在进行的另一个随机接入过程。

Description

通信方法、终端设备和网络设备 技术领域
本申请实施例涉及通信技术领域,具体涉及一种通信方法、终端设备和网络设备。
背景技术
在通信系统中,终端设备可以通过随机接入过程接入到网络中。
随着通信系统的发展,期望越来越低的通信时延,因此如何在随机接入过程中降低通信时延是一项亟待解决的问题。
发明内容
本申请实施例提供一种通信方法、终端设备和网络设备,可以降低随机接入过程的通信时延以及提高随机接入过程中随机接入的成功率。
第一方面,提供了一种通信方法,包括:终端设备并行进行2步随机接入过程和4步随机接入过程;在通过所述2步随机接入过程和所述4步随机接入过程中的一个随机接入过程实现成功接入的情况下,所述终端设备停止正在进行的另一个随机接入过程。
第二方面,提供了一种通信方法,包括:在终端设备并行进行的2步随机接入过程和4步随机接入过程中的一个随机接入过程实现成功接入的情况下,网络设备执行以下操作中的至少一个:停止正在进行的另一个随机接入过程,和/或,在实现成功接入的一个随机接入过程中发送第一指示信息,所述第一指示信息用于指示所述终端设备停止另一个随机接入过程。
第三方面,提供了一种终端设备,用于执行上述第一方面中的方法。
具体地,该终端设备包括用于执行上述第一方面中的方法的功能模块。
第四方面,提供了一种网络设备,用于执行上述第二方面中的方法。
具体地,该网络设备包括用于执行上述第二方面中的方法的功能模块。
第五方面,提供了一种通信设备,包括处理器、存储器和收发器。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,控制收发器执行上述第一方面或第二方面中的方法。
第六方面,提供了一种芯片,用于实现上述第一方面或第二方面中的方法。
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通过收发器执行如上述第一方面或第二方面中的方法。
第七方面,提供了一种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通过收发器执行上述第一方面或第二方面中的方法。
第八方面,提供了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通过收发器执行上述第一方面或第二方面中的方法。
第九方面,提供了一种计算机程序,当其在计算机上运行时,使得计算机通过收发器执行上述第一方面或第二方面中的方法。
通过以上技术方案,由于终端设备并行进行2步随机接入过程和4步随机接入过程,在其中的一个随机接入过程实现成功接入的情况下,停止正在进行的另一个随机接入过程,可以增加接入的成功率和降低成功接入的时延。
附图说明
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4步随机接入过程的示意性图。
图3是2步随机接入过程的示意性图。
图4是随机接入响应(Random Access Response,RAR)结构的一种示意性图。
图5是RAR结构的一种示意性图。
图6是RAR结构的一种示意性图。
图7是RAR结构的一种示意性图。
图8是根据本申请实施例的一种通信方法的示意性流程图。
图9是根据本申请实施例的另一种通信方法的示意性流程图。
图10是根据本申请实施例提供的一种终端设备的示意性框图。
图11是根据本申请实施例提供的一种网络设备的示意性框图。
图12是根据本申请实施例提供的一种通信设备的示意性框图。
图13是根据本申请实施例提供的一种通信装置的示意性框图。
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可以是与终端设备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设备进行通信。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设备120。作为在此使用的“终端设备”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/或另一终端设备的被设置成接收/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设备可以被称为“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。终端设备可以指接入终端、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网络中的终端设备或者未来演进的PLMN中的终端设备等。
可选地,终端设备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设备,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设备,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和终端设备120,网络设备110和终端设备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。
在通信系统中,终端设备可以通过随机接入过程接入到网络中。通常的随机接入过程可以分为4步随机接入过程和2步随机接入过程。
以下将结合图2和图3分别介绍4步随机接入过程和2步随机接入过程。
图2示出了4步随机接入过程的示意性图。
201,终端设备向网络设备发送消息1(MSG1,可以称为4步随机接入过程中的第一步消息)。相应地,网络设备可以接收该MSG1。该MSG1可以包括随机接入前导码。
具体地,终端设备可以选择物理随机接入信道(Physical Random Access Channel,PRACH)资源(包括时域资源和频域资源)以及随机接入前导码(preamble),可以在选择的PRACH资源上发送选择的随机接入前导码。其中,终端设备可以在PRACH资源集合中选择PRACH资源,以及可以在随机接入前导码集合中选择随机接入前导码。
202,网络设备可以向终端设备发送消息2(MSG2,可以称为4步随机接入过程中的第二步消息)。相应地,终端设备可以接收该MSG2。该MSG2可以包括随机接入响应消息(Random Access Response,RAR)。
具体地,网络设备可以在接收到MSG1之后,可以基于该MSG1中承载的随机接入前导码估计上行定时,以及估计终端设备进行MSG3传输所需的上行资源,并基于此发送MSG2。
MSG2可以包括物理下行控制信道(Physical Downlink Control Channel,PDCCH)和物理下行共享信道(Physical Downlink Shared Channel,PDSCH)。该PDCCH可以是通过随机接入无线网络临时标识(Random Access Radio Network Temporary Identity,RA-RNTI)加扰的,该RA-RNTI可以与终端设备发送随机接入前导码所选用的时频资源得到。
该RA-RNTI可以是通过但不限于以下公式1计算得到:
RA-RNTI=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id公式1
其中,s_id代表所选用的时频资源的子帧ID,t_id代表所选用的时频资源的符号ID,f_id代表所选用的时频资源的频域ID,ul_carrier_id代表所选用的时频资源的上行载波ID。
网络设备发送的PDCCH可以用于调度PDSCH,该PDSCH可以包括RAR。其中,PAR的结构可以如图4至7所示。
如图4所示,在第二步消息中发送的媒体接入控制(Media Access Control,MAC)协议数据单元(Protocol Data Unit,PDU)可以包括多个子PDU(即MAC子PDU1,MAC子PDU2,一直到MAC子PDUn),每个子PDU可以包括子头,以及可以进一步包括MAC RAR等。
如图5所示,RAR的子头可以中可以包括随机接入回退索引(Backoff index,BI),用于指示重传第一步消息的回退时间。
以及如图6所示,RAR的子头中包括RAR标识(RAR Identity,RARID),该RARID用于网络设备响应的随机接入前导码的索引。
如图7所示,RAR的负荷中可以包括时间提前命令字段(Timing Advance Command)以用于调整上行时序、上行授权(UL Grant)字段、临时小区无线网络临时标识(Temporary Cell Radio Network Temporary Identity,TC-RNTI)等。
图4-图7中的E为扩展比特,指示包含了MAC子头的MAC子PDU是否是最后一个MAC子PDU。T代表MAC子头中包含RAPID还是回退(backoff)指示。R比特为预留比特。
对于终端设备而言,在发送MSG1之后,可以启动一个RAR侦听窗口,终端设备可以在该窗口内侦听PDCCH,终端设备可以利用该RA-RNTI对PDCCH进行解扰。并基于解扰得到的PDCCH,获取其调度的PDSCH。
303,终端设备向网络设备发送消息3(MSG3,可以称为4步随机接入过程中的第三步消息),相应地,网络设备可以接收终端设备发送的MSG3。其中,该MSG3可以包括无线资源控制(Radio Resource Control,RRC)消息。
具体地,终端设备可以基于MSG2中的资源授权向网络设备消息3。该消息3可以向网络设备通知终端设备触发随机接入的触发事件。
进一步地,终端设备还可以在MSG3中携带标识信息,例如,小区无线网络临时标识(Cell Radio Network Temporary Identity,C-RNTI),5G SAE临时移动标识(5G SAE Temporary Mobile Station Identifier,5G-S-TMSI)或C-RNTI和短完整性的消息认证码(Short MAC-I(Message Authentication Code Integrity,MAC-I))等。
例如,在初始随机接入过程中,该标识信息可以是5G-S-TMSI,在RRC重建触发的随机接入过程中,该标识信息可以是C-RNTI和Short MAC-I。
其中,该标识信息可以通过携带在第四步消息中使得竞争冲突得到解决,也即终端设备实现成功接入。
在304中,网络设备向终端设备发送消息4(MSG4,可以称为4步随机接入过程中的第四步消息),相应地,终端设备接收网络设备发送的MSG4。
具体地,网络设备在接收到MSG3之后,可以向终端设备发送MSG4,该MSG4可以包括终端设备在MSG3中携带的标识信息,以及RRC重配置消息。
对于终端设备而言,可以在发送完MSG3之后,可以启动一个定时器(例如,竞争解决定时器(Contention resolution timer))以侦听MSG4。
MSG4可以用于实现竞争冲突的解决,其中,竞争冲突的解决可以通过以下方式来实现。
方式一,如果终端设备在MSG3中携带了C-RNTI,则MSG4用C-RNTI加扰的PDCCH调度。
方式二,如果终端设备在MSG3中没有携带C-RNTI,比如是初始接入触发的随机接 入,则MSG4用TC-RNTI加扰的PDCCH调度;冲突的解决可以是通过终端设备接收MSG4中的PDSCH,通过匹配PDSCH中的公共控制信道(common control channel,CCCH)服务数据单元(Service Data Unit,SDU)来实现冲突的解决。
以下表1示出了在多种事件触发的随机接入的场景下,四步随机接入过程中各步消息所需携带的内容。
表1
Figure PCTCN2019079592-appb-000001
以上介绍了4步随机接入过程,应理解,以上介绍的4步随机接入过程中各个消息携带的内容仅仅是本申请的一种实现方式,不应对本申请实施例造成特别的限定。
图3示出了2步随机接入过程的示意性图。
在301中,终端设备可以向网络设备发送消息A(MSGA),相应地,网络设备可 以接收该消息A。
MSGA可以由随机接入前导码和负荷部分组成,负荷部分携带的可以是上述4步随机接入过程中的MSG3中的信息。例如,在终端设备处于空闲态时的RRC信令,或者为,在RRC处于连接态时的C-RNTI等。其中,MSGA中的负荷部分可以由物理上行共享信道(Physical Uplink Shared Channel,PUSCH)来承载。
在302中,网络设备可以向终端设备发送MSGB,终端设备可以接收网络设备发送的MSGB。MSGB可以包括上述4步随机过程中的MSG2和MSG4中的内容。
网络设备在解析成功MSGA之后,可以向终端设备发送MSGB,从而实现竞争冲突的解决。其中,网络设备接收MSGA的情况可以是以下任一情况中的一种:
情况1:网络设备成功解码出随机接入前导码;
情况2:网络设备成功解码出随机接入前导码和负荷部分;
情况3:网络设备成功解码出负荷部分,但是未解码出随机接入前导码。
其中,针对情况2,网络设备可以向终端设备发送MSGB。
终端设备可以在2步随机接入过程未实现成功接入的情况下,回落到4步随机接入过程,这将增加成功接入的时延。
本申请实施例提供了以下的方案,可以解决以上提到的时延的问题。
图8是根据本申请实施例的通信方法400的示意性流程图。该方法400包括以下内容中的至少部分内容。
在410中,终端设备并行进行2步随机接入过程和4步随机接入过程。
在420中,在通过所述2步随机接入过程和所述4步随机接入过程中的一个随机接入过程实现成功接入的情况下,所述终端设备停止正在进行的另一个随机接入过程。
具体地,由于终端设备并行进行2步随机接入过程和4步随机接入过程,在其中的一个随机接入过程实现成功接入的情况下,停止正在进行的另一个随机接入过程,可以增加接入的成功率和降低成功接入的时延。
图9是根据本申请实施例的通信方法500的示意性流程图。该方法500包括以下内容中的至少部分内容。
在510中,在终端设备并行进行的2步随机接入过程和4步随机接入过程中的一个随机接入过程实现成功接入的情况下,网络设备执行以下操作中的至少一个:
停止正在进行的另一个随机接入过程;
在实现成功接入的一个随机接入过程中发送第一指示信息,所述第一指示信息用于指示所述终端设备停止另一个随机接入过程。
具体地,由于终端设备并行进行2步随机接入过程和4步随机接入过程,在其中的一个随机接入过程实现成功接入的情况下,停止正在进行的另一个随机接入过程,可以增加接入的成功率和降低成功接入的时延。
以上提到了在2步随机接入过程和4步随机接入过程中的其中一个随机接入过程成功接入的情况下,停止正在进行的另一个随机接入过程,而在一些情况下,有可能存在其中的一个随机接入过程实现接入失败,则此时网络终端设备和网络设备可以继续另一个随机接入过程,由此可以增加随机接入的成功率。
为了更加清楚地理解本申请,以下将对本申请实施例进行描述,以下描述的内容可以适用于上述方法400和方法500。
本申请实施例中提到的2步随机接入过程和4步随机接入过程中的并行可以是指两个随机接入过程在时间上存在至少部分重叠。其中,2步随机接入过程和4步随机接入过程的起始点可以是相同的,或者,也可以是不相同的,例如相差一定的时间长度等。
在终端设备并行进行2步随机接入过程和4步随机接入过程时,实现成功接入的有可能是2步随机接入过程,而4步随机接入过程还在正在进行,在实现成功接入时,针对4步随机接入过程,终端设备可能处在以下过程中中的任一种过程中:
1)准备第一步消息
2)发送第一步消息
3)等待监听第二步消息
4)检测第二步消息
5)准备第三步消息
6)发送第三步消息
7)等待监听第四步消息
8)检测第四步消息
终端设备可以处于以上过程的任一过程,终端设备在通过2步随机接入过程实现接入成功的情况下,可以终止4步随机接入过程中上述任一正在进行的过程。
或者,在终端设备并行进行2步随机接入过程和4步随机接入过程时,实现成功接入的有可能是4步随机接入过程,而2步随机接入过程还在正在进行,在实现成功接入时,针对2步随机接入过程,终端设备可能处在以下过程中的任一过程:
1)准备第一步消息
2)发送第一步消息
3)等待监听第二步消息
4)检测第二步消息
终端设备可以处于以上过程的任一过程,终端设备在通过4步随机接入过程实现接入成功的情况下,可以终止上述2步随机接入过程中任一正在进行的过程。
在终端设备并行进行2步随机接入过程和4步随机接入过程时,实现成功接入的有可能是2步随机接入过程,而4步随机接入过程还在正在进行,在实现成功接入时,针对4步随机接入过程,网络设备可能处在以下过程中中的任一种过程中:
1)准备第二步消息
3)发送第二步消息
4)等待检测第三步消息
5)检测第三步消息
6)准备第四消息
7)发送第四步消息
网络设备可以处于以上过程的任一过程,终端设备在通过2步随机接入过程实现接入成功的情况下,网络设备可以终止4步随机接入过程中上述任一正在进行的过程。
或者,在终端设备并行进行2步随机接入过程和4步随机接入过程时,实现成功接入的有可能是4步随机接入过程,而2步随机接入过程还在正在进行,在实现成功接入时,针对2步随机接入过程,网络设备可能处在以下过程中的任一过程:
以下过程中的任一过程:
1)准备第二步消息
2)发送第二步消息
网络设备可以处于以上过程的任一过程,终端设备在通过4步随机接入过程实现接入成功的情况下,网络设备可以终止2步随机接入过程中上述任一正在进行的过程。
可选地,在本申请实施例中,以上提到了在其中的一个随机接入过程失败之后,网络设备也可以主动停止终端设备的另一个随机接入过程,此时网络设备也可以进一步地在实现接入成功的一个随机接入过程的最后一步消息中携带第一指示信息,向终端设备指示停止另一个随机接入过程,例如,该第一指示信息可以承载于2步随机接入过程中的第二步消息中,或者承载于4步随机接入过程中的第四步消息中。
或者,在本申请实施例中,网络设备可以仅发送第一指示信息,而不主动停止终端设备正在进行的随机接入过程,由终端设备实现停止正在进行的随机接入过程。
或者,在本申请实施例中,网络设备也可以仅主动停止正在进行的随机接入过程, 而不发送第一指示信息。
以上提到了在2步随机接入过程和4步随机接入过程中的其中一个随机接入过程成功接入的情况下,停止正在进行的另一个随机接入过程,而在一些情况下,有可能存在其中的一个随机接入过程实现接入失败,则此时终端设备可以继续另一个随机接入过程,由此可以增加随机接入的成功率。
在本申请实施例中,在其中的一个随机接入过程实现接入失败,而另一个随机接入过程正在进行,终端设备可以重新发起接入失败的该一个随机接入过程。
或者,终端设备也可以不重新发起该随机接入过程,而是等待该另一个随机接入过程的结果,如果另一个随机接入过程也未实现成功接入,则可以再次发起随机接入过程,再次发起的随机接入过程可以是并行的2步随机接入过程和4步随机接入过程。
例如,2步随机接入过程正在进行,终端设备在发送完4步随机接入过程的消息1之后,如果在侦听窗口内未侦听到MSG2,则可以此次4步随机接入过程失败,终端设备可以重新发起4步随机接入过程,也即可以重发消息1。
当然,终端设备也可以等待2步随机接入过程的结果,如果2步随机接入过程也未实现成功接入,则可以再次发起随机接入过程,再次发起的随机接入过程可以是并行的2步随机接入过程和4步随机接入过程。
以上提到了可以对随机接入过程进行重传(其中,对随机接入过程进行重传可以是指重复进行随机接入过程),本申请实施例提到的2步随机接入过程和4步随机接入过程均可以被重传。
例如,终端设备被触发进行随机接入过程,则终端设备可以并行进行2步随机接入过程和4步随机接入过程,在4步随机接入过程失败的情况下,2步随机接入过程正在进行,则终端设备可以重新发起4步随机接入过程,在重新发起4步随机接入过程之后,2步随机接入过程失败,而重新发起的4步随机接入过程正在进行,则终端设备可以重新发起2步随机接入过程,以此类推,直到2步随机接入过程和4步随机接入过程分别达到各自对应的最大重传次数,或者直到2步随机接入过程和4步随机接入过程中存在一个随机接入过程实现接入成功。
以上的举例提到2步随机接入过程和4随机接入过程分别存在各自对应的最大重传次数,2步随机接入过程和4步随机接入过程各自对应的最大重传次数可以分别由网络设备配置,或者网络设备配置一个最大重传次数,分别作为2步随机接入过程和4步随机接入过程的最大重传次数。
或者,在本申请实施例中,最大重传次数可以是允许的2步随机接入过程和4步随机接入过程的重传次数的总和。
例如,最大重传次数是8,则允许2步随机接入过程和4步随机接入过程的重传总和不超过8,例如,4步随机接入过程重传了5次,2步随机接入过程重传了3次,则达到最大重传次数,不再允许终端设备进行随机接入过程的重传,可以例如等待一段时间之后再进行随机接入。
可选地,在本申请实施例中,2步随机接入过程中的第一步消息包括第一随机接入前导码和第一负荷部分,其中,在所述2步随机接入过程中发送的所述第一随机接入前导码被复用作为所述4步随机接入过程中的第一步消息中的随机接入前导码。
具体而言,由于2步随机接入过程和4步随机接入过程均包括随机接入前导码,则可以将一次发送的随机接入前导码即作为2步随机接入过程的随机接入前导码,也作为4步随机接入过程的前导码。或者,也可以理解为2步随机接入过程中的随机接入前导码和4步随机接入过程中的随机接入前导码可以是在同一个PRACH资源上发送的同一个随机接入前导码,从而可以节省随机接入资源。
在该种情况下,终端设备进一步发送第一步消息中的负荷部分。
其中,在所述第一随机接入前导码发送完毕之后,终端设备可以开启第一帧听窗口, 以用于帧听所述4步随机接入过程中的第二步消息;
具体地,终端设备可以在该侦听窗口内,监听RA-RNTI加扰的PDCCH用于接收RAR,如果收到后续正确的RAR,则传输Msg3并启动contention resolution timer以监听Msg4。
在所述第一随机接入前导码和所述第一负荷部分发送完毕之后,终端设备可以开启第二帧听窗口,以用于帧听所述2步随机接入过程中的第二步消息。
具体地,终端设备可以在该侦听窗口内,RA-RNTI加扰的PDCCH(如果第一步消息中不包含C-RNTI)或C-RNTI加扰的PDCCH(如果第二步消息中包含C-RNTI)用于接第二步消息。
对于网络设备而言,在解析该第一随机接入前导码之后,可以针对该随机接入前导码发送2步随机接入过程中的第二步消息,以及在解析第一负荷部分之后,可以发送4步随机接入过程中的第二步消息。
可选地,在本申请实施例中,所述2步随机接入过程中的第一步消息包括第二随机接入前导码和第二负荷部分,所述4步随机接入过程中的第一步消息包括第三随机接入前导码,所述第二随机接入前导码和所述第三随机接入前导码被分别发送。
具体而言,终端设备可以针对2步随机接入过程和4步随机接入过程分别发送随机接入前导码,也即第二随机接入前导码和第三随机接入前导码,该第二随机接入前导码与第三随机接入前导码可以相同,也可以不相同。
在所述第二随机接入前导码和所述第二负荷部分发送完毕之后,所述终端设备开启第三帧听窗口,以用于帧听所述2步随机接入过程中的第二步消息。
具体地,终端设备可以在该侦听窗口内,监听RA-RNTI加扰的PDCCH用于接收RAR,如果收到后续正确的RAR,则传输Msg3并启动contention resolution timer以监听Msg4。
在所述第三随机接入前导码发送完毕之后,所述终端设备开启第四帧听窗口,以用于帧听所述4步随机接入过程中的第二步消息。
具体地,终端设备可以在该侦听窗口内,RA-RNTI加扰的PDCCH(如果第一步消息中不包含C-RNTI)或C-RNTI加扰的PDCCH(如果第二步消息中包含C-RNTI)用于接第二步消息。
对于网络设备而言,可以在解析该第二随机接入前导码和第二负荷部分,可以发送2步随机接入过程中的第二步消息,以及在解析该第三随机接入前导码之后,可以发送4步随机接入过程中的第二步消息。
对于以上提到的2步随机接入过程和4步随机接入过程共用随机接入前导码的情况可以发生在并行进行的第一次的2步随机接入过程和4步随机接入过程,如果之后的其中一个随机接入过程失败,进行另一个随机接入过程,此时,可以针对该一个随机接入过程发送随机接入前导码,例如,2步随机接入过程先实现接入失败,而4步随机接入过程正在进行,则终端设备可以发送随机接入前导码以及负荷部分,网络设备解析该随机接入前导码和负荷部分之后仅发送2步随机接入过程中的第二步消息,而不再发送4步随机接入过程中的第二步消息。
在本申请实施例中,终端设备可以在任何情况下的随机接入时,均并行进行2步随机接入过程和4步随机接入过程。或者,也可以在满足一定的条件下,才并行进行2步随机接入过程和4步随机接入过程。
具体地,可以是终端设备所处的状态满足特定状态和/或触发随机接入的事件为特定事件时,所述终端设备并行进行2步随机接入过程和4步随机接入过程。
例如,可以是只要终端所处的状态为特定状态时,所述终端设备并行进行2步随机接入过程和4步随机接入过程。
例如,可以是只要触发随机接入的事件为特定事件时,所述终端设备并行进行2步 随机接入过程和4步随机接入过程。
例如,可以是终端设备所处的状态为特定状态以及触发随机接入的事件是特定事件时,终端设备才进行2步随机接入事件和4步随机接入事件。
本申请实施例提到的终端设备的状态可以是空闲态,连接态和非激活态(inactive)等。
其中,特定状态可以包括以下中的至少一种:连接态、空闲态和非激活态。
在本申请实施例中,用于触发随机接入的事件可以是以下中的任一个:
从RRC空闲态的初始接入(Initial access from RRC_IDLE);
RRC连接重建过程(RRC Connection Re-establishment procedure);
切换(Handover);
当上行同步状态是失步状时,RRC连接态期间的上行或下行数据到达(DL or UL data arrival during RRC_CONNECTED when UL synchronisation status is"non-synchronised");
从RRC非连接态的转换(Transition from RRC_INACTIVE);
用于其他系统信息的请求(Request for Other SI)。
本申请实施例中,对于以上的触发事件还可以再进行细分。
例如,RRC连接态期间的数据到达触发随机接入还可以分为不同的逻辑信道的调度请求(Scheduling Request,SR)触发的随机接入。
在本申请实施例中,在触发事件为特定的触发事件时,终端设备可以并行进行2步随机接入过程和4步随机接入过程。
其中,该特定事件可以是初始接入或者是特定的逻辑信道触发SR。
本申请实施例中的特定的逻辑信道可以是特定业务的逻辑信道。
本申请实施例中的特定的业务可以是优先级较高的业务,例如,可以是URLLC业务等。
可选地,在本申请实施例中,在一些情况下,上述提到的并行进行2步随机接入过程和4步随机接入过程所需满足的条件可以是预设在终端设备上的,也可以是由网络设备配置的。
在一种实现方式中,网络设备可以向终端设备发送第二指示信息,所述终端设备接收网络设备发送的第二指示信息;其中,所述第二指示信息指示:
所述特定状态和/或所述特定事件;或者,
所述终端设备的各种状态是否是所述终端设备并行进行2步随机接入过程和4步随机接入过程所需的状态,和/或,触发随机接入的各个事件是否触发所述终端设备并行进行2步随机接入过程和4步随机接入过程。
具体地,网络设备可以向终端设备配置上述提到的特定状态和/或特定事件,也就是网络设备可以直接告知终端设备哪些是上述提到的特定状态和/或特定事件。
或者,网络设备也可以向终端设备配置各个状态和/或各个触发随机接入的事件是否可以触发并行进行2步随机接入过程和4步随机接入过程。
可选地,在本申请实施例中,所述第二指示信息承载于系统消息中或无线资源控制RRC专用信令中。
例如,网络设备可以发送系统消息,系统消息可以指示终端设备哪种RRC状态的终端设备可以并行进行2步随机接入过程和4步随机接入过程。
例如,网络设备可以通过RRC专用信令指示连接状态下具有并行进行2步随机接入过程和4步随机接入过程能力的终端设备是否允许并行进行2步随机接入过程和4步随机接入过程。
例如,网络设备可以指示哪些逻辑信道的SR允许并行进行2步随机接入过程和4步随机接入过程,例如,允许URLLC业务的逻辑信道可以触发并行进行2步随机接入过程和4步随机接入过程。
例如,针对inactive状态的终端设备,网络设备在延缓(suspend)终端设备时通过RRC专用信令(例如,RRC连接释放消息)指示具有并行随机接入能力的终端设备在下一次触发连接恢复时是否允许发起并行的4步随机接入过程和2步随机接入过程。
可选地,在本申请实施例中,也可以不存在特定状态和特定触发事件,而是终端设备可以发送系统消息,指示终端设备在后续进行接入时,2步随机接入过程与4步随机接入过程可以并行进行。
可选地,在本申请实施例中,对于2步随机接入过程和4步随机接入过程所采用的随机接入资源可以由网络设备分别配置的。
本申请实施例提到的随机接入资源可以包括PRACH资源(也可以称为RACH机会(RACH Occasion,RO))以及随机接入前导码。
网络设备可以为4步随机接入过程和2步随机接入过程分别配置PRACH资源集合和随机接入前导码集合。
或者,在本申请实施例中,网络设备可以针对4步随机接入过程和2步随机接入过程配置共用的PRACH资源集合/或共用的随机接入前导码集合。
也就是说,对于终端设备而言,可以具有相同的随机接入前导码集合和/或相同的PRACH资源集合。
可选地,在本申请实施例中,在终端设备选择PRACH资源时,可以对SSB进行测量,可以根据SSB的测量结果选择PRACH资源。也就是SSB的测量结果与PRACH资源是存在对应关系,可以根据该对应关系,以及SSB的测量结果,选择PRACH资源。一个SSB测量结果的范围可以对应于多个PRACH资源,也就是说,在SSB的测量结果处于该范围内时,终端设备可以从该多个PRACH资源中进行PRACH资源的选择。
可选地,在本申请实施例中,终端设备在并行进行2步随机接入过程和4步随机接入过程时,发送第一步消息所采用的PRACH资源和随机接入前导码中的一个可以是相同。
例如,2步随机接入过程和4步随机接入过程的PRACH资源相同,但是随机接入前导码不同。
例如,2步随机接入过程和4步随机接入过程的PRACH资源不同,但是随机接入前导码相同。
可选地,在本申请实施例中,在2步随机接入过程中,随机接入资源还可以包括PUSCH资源,该PUSCH资源可以用于发送2步随机接入过程中的第一步消息中的负荷部分。
可选地,在本申请实施例中,终端设备可以为其中一种随机接入过程配置随机接入资源,并可以指示并该种随机接入过程配置的随机接入资源中的部分资源作为另一种随机接入过程的随机接入资源。
在一种实现方式中,网络设备可以向终端设备发送第三指示信息,所述终端设备接收网络设备发送的第三指示信息,所述第三指示信息指示所述2步随机接入过程的第一随机接入资源;网络设备可以向终端设备发送第四指示信息,所述终端设备接收所述网络设备发送的第四指示信息,所述第四指示信息指示将所述第一随机接入资源中的部分资源作为所述4步随机接入过程的第二随机接入资源。
其中,所述第四指示信息通过以下方式指示所述部分资源作为所述第二随机接入资源:为所述第一随机接入资源中的其它部分资源配置对应的物理上行共享信道PUSCH资源,以及不为所述部分资源配置对应的PUSCH资源。
应理解,在本申请实施例,第四指示还可以通过其他方式指示所述部分资源作为第二随机接入资源,例如,可以通过显示的方式指示该部分资源作为第二随机接入资源。
在本申请实施例中,网络设备还可以分别为4步随机接入过程和2步随机接入过程分别配置随机接入资源。
因此,在本申请实施例中,由于终端设备并行进行2步随机接入过程和4步随机接入过程,在其中的一个随机接入过程实现成功接入的情况下,停止正在进行的另一个随机接入过程,可以增加接入的成功率和降低成功接入的时延。
图10是根据本申请实施例的终端设备600的示意性框图。该终端设备600包括随机接入单元610。该随机接入单元610用于:并行进行2步随机接入过程和4步随机接入过程;以及在通过所述2步随机接入过程和所述4步随机接入过程中的一个随机接入过程实现成功接入的情况下,停止正在进行的另一个随机接入过程。
可选地,在本申请实施例中,所述随机接入单元610进一步用于:
在所述2步随机接入过程和所述4步随机接入过程中的一个随机接入过程实现接入失败的情况下,继续正在进行的另一个随机接入过程。
可选地,在本申请实施例中,所述2步随机接入过程中的第一步消息包括第一随机接入前导码和第一负荷部分,其中,在所述2步随机接入过程中发送的所述第一随机接入前导码被复用作为所述4步随机接入过程中的第一步消息中的随机接入前导码。
可选地,在本申请实施例中,所述随机接入单元610进一步用于:
在所述第一随机接入前导码发送完毕之后,开启第一帧听窗口,以用于帧听所述4步随机接入过程中的第二步消息;
在所述第一随机接入前导码和所述第一负荷部分发送完毕之后,开启第二帧听窗口,以用于帧听所述2步随机接入过程中的第二步消息。
可选地,在本申请实施例中,所述2步随机接入过程中的第一步消息包括第二随机接入前导码和第二负荷部分,所述4步随机接入过程中的第一步消息包括第三随机接入前导码,所述第二随机接入前导码和所述第三随机接入前导码被分别发送。
可选地,在本申请实施例中,所述随机接入单元610进一步用于:
在所述第二随机接入前导码和所述第二负荷部分发送完毕之后,开启第三帧听窗口,以用于帧听所述2步随机接入过程中的第二步消息;
在所述第三随机接入前导码发送完毕之后,开启第四帧听窗口,以用于帧听所述4步随机接入过程中的第二步消息。
可选地,在本申请实施例中,在实现成功接入的一个随机接入过程的最后一步消息中携带第一指示信息,所述第一指示信息用于指示停止另一个随机接入过程;
所述随机接入单元610进一步用于:
根据所述第一指示信息,停止正在进行的另一个随机接入过程。
可选地,在本申请实施例中,所述随机接入单元610进一步用于:
所述终端设备所处的状态满足特定状态和/或触发随机接入的事件为特定事件时,并行进行2步随机接入过程和4步随机接入过程。
可选地,在本申请实施例中,所述特定事件为:
特定逻辑信道的调度请求;或
初始接入。
可选地,在本申请实施例中,终端设备600还包括接收单元620,用于:
接收网络设备发送的第二指示信息;其中,所述第二指示信息指示:
所述特定状态和/或所述特定事件;或者,
所述终端设备的各种状态是否是所述终端设备并行进行2步随机接入过程和4步随机接入过程所需的状态,和/或,触发随机接入的各个事件是否触发所述终端设备并行进行2步随机接入过程和4步随机接入过程。
可选地,在本申请实施例中,所述第二指示信息承载于系统消息中或无线资源控制RRC专用信令中。
可选地,在本申请实施例中,终端设备600还包括接收单元620,用于:
接收网络设备发送的第三指示信息,所述第三指示信息指示所述2步随机接入过程 的第一随机接入资源;
接收所述网络设备发送的第四指示信息,所述第四指示信息指示将所述第一随机接入资源中的部分资源作为所述4步随机接入过程的第二随机接入资源。
可选地,在本申请实施例中,所述第四指示信息通过以下方式指示所述部分资源作为所述第二随机接入资源:
为所述第一随机接入资源中的其它部分资源配置对应的物理上行共享信道PUSCH资源,以及不为所述部分资源配置对应的PUSCH资源。
应理解,该终端设备600可以用于实现上述方法实施例中由终端设备实现的相应操作,为了简洁,在此不再赘述。
图11是根据本申请实施例的网络设备700的示意性框图。该网络设备700包括随机接入单元710,用于:
在终端设备并行进行的2步随机接入过程和4步随机接入过程中的一个随机接入过程实现成功接入的情况下,执行以下操作中的至少一个:
停止正在进行的另一个随机接入过程,和/或,在实现成功接入的一个随机接入过程中发送第一指示信息,所述第一指示信息用于指示所述终端设备停止另一个随机接入过程。
可选地,在本申请实施例中,所述2步随机接入过程中的第一步消息包括第一随机接入前导码和第一负荷部分,其中,在所述2步随机接入过程中传输的所述第一随机接入前导码被复用作为所述4步随机接入过程中的第一步消息中的随机接入前导码。
可选地,在本申请实施例中,所述2步随机接入过程中的第一步消息包括第二随机接入前导码和第二负荷部分,所述4步随机接入过程中的第一步消息包括第三随机接入前导码,所述第二随机接入前导码和所述第三随机接入前导码被分别传输。
可选地,在本申请实施例中,网络设备700还包括发送单元720,用于:
向所述终端设备发送第二指示信息;其中,所述第二指示信息指示以下中的至少一种:
所述终端设备并行进行2步随机接入过程和4步随机接入过程所需满足的特定状态;
触发所述终端设备并行进行2步随机接入过程和4步随机接入过程的特定触发事件;
所述终端设备的各种状态是否是所述终端设备并行进行2步随机接入过程和4步随机接入过程所需的状态;
触发随机接入的各个事件是否触发所述终端设备并行进行2步随机接入过程和4步随机接入过程。
可选地,在本申请实施例中,所述第二指示信息承载于系统消息中或无线资源控制RRC专用信令中。
可选地,在本申请实施例中,网络设备700还包括发送单元720,用于:
发送第三指示信息,第三指示信息指示所述2步随机接入过程的第一随机接入资源;
发送第四指示信息,第四指示信息指示将所述第一随机接入资源中的部分资源作为所述4步随机接入过程的第二随机接入资源。
可选地,在本申请实施例中,所述第四指示信息通过以下方式指示所述部分资源作为所述第二随机接入资源:
为所述第一随机接入资源中的其它部分资源配置对应的PUSCH资源,以及不为所述部分资源配置对应的PUSCH资源。
应理解,该网络设备700可以用于实现上述方法实施例中由网络设备实现的相应操作,为了简洁,在此不再赘述。
图12是本申请实施例提供的一种通信设备800示意性结构图。图12所示的通信设备800包括处理器810,处理器810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12所示,通信设备800还可以包括存储器820。其中,处理器810可以从存储器820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820可以是独立于处理器810的一个单独的器件,也可以集成在处理器810中。
可选地,如图12所示,通信设备800还可以包括收发器830,处理器810可以控制该收发器830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830可以包括发射机和接收机。收发器830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800具体可为本申请实施例的网络设备,并且该通信设备800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800具体可为本申请实施例的移动终端/终端设备,并且该通信设备800可以实现本申请实施例的各个方法中由移动终端/终端设备实现的相应流程,为了简洁,在此不再赘述。
图13是本申请实施例的通信装置的示意性结构图。图13所示的通信装置900包括处理器910,处理器910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,通信装置900还可以包括存储器920。其中,处理器910可以从存储器920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920可以是独立于处理器910的一个单独的器件,也可以集成在处理器910中。
可选地,该通信装置900还可以包括输入接口930。其中,处理器910可以控制该输入接口930与其他设备或通信装置进行通信,具体地,可以获取其他设备或通信装置发送的信息或数据。
可选地,该通信装置900还可以包括输出接口940。其中,处理器910可以控制该输出接口940与其他设备或通信装置进行通信,具体地,可以向其他设备或通信装置输出信息或数据。
可选地,该通信装置可应用于本申请实施例中的网络设备,并且该通信装置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,该通信装置可应用于本申请实施例中的移动终端/终端设备,并且该通信装置可以实现本申请实施例的各个方法中由移动终端/终端设备实现的相应流程,为了简洁,在此不再赘述。
应理解,本申请实施例提到的通信装置可以为芯片,该芯片还可以称为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。
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移动终端/终端设备实现的相应流程,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移动终端/终端设备实现的相应流程,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移动终端/终端设备实现的相应流程,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 (46)

  1. 一种通信方法,其特征在于,包括:
    终端设备并行进行2步随机接入过程和4步随机接入过程;
    在通过所述2步随机接入过程和所述4步随机接入过程中的一个随机接入过程实现成功接入的情况下,所述终端设备停止正在进行的另一个随机接入过程。
  2. 根据权利要求1所述的方法,其特征在于,所述方法还包括:
    在所述2步随机接入过程和所述4步随机接入过程中的一个随机接入过程实现接入失败的情况下,所述终端设备继续正在进行的另一个随机接入过程。
  3. 根据权利要求1或2所述的方法,其特征在于,所述2步随机接入过程中的第一步消息包括第一随机接入前导码和第一负荷部分,其中,在所述2步随机接入过程中发送的所述第一随机接入前导码被复用作为所述4步随机接入过程中的第一步消息中的随机接入前导码。
  4. 根据权利要求3所述的方法,其特征在于,所述终端设备并行进行2步随机接入过程和4步随机接入过程,包括:
    在所述第一随机接入前导码发送完毕之后,所述终端设备开启第一帧听窗口,以用于帧听所述4步随机接入过程中的第二步消息;
    在所述第一随机接入前导码和所述第一负荷部分发送完毕之后,所述终端设备开启第二帧听窗口,以用于帧听所述2步随机接入过程中的第二步消息。
  5. 根据权利要求1或2所述的方法,其特征在于,所述2步随机接入过程中的第一步消息包括第二随机接入前导码和第二负荷部分,所述4步随机接入过程中的第一步消息包括第三随机接入前导码,所述第二随机接入前导码和所述第三随机接入前导码被分别发送。
  6. 根据权利要求5所述的方法,其特征在于,所述终端设备并行进行2步随机接入过程和4步随机接入过程,包括:
    在所述第二随机接入前导码和所述第二负荷部分发送完毕之后,所述终端设备开启第三帧听窗口,以用于帧听所述2步随机接入过程中的第二步消息;
    在所述第三随机接入前导码发送完毕之后,所述终端设备开启第四帧听窗口,以用于帧听所述4步随机接入过程中的第二步消息。
  7. 根据权利要求1至6中任一项所述的方法,其特征在于,在实现成功接入的一个随机接入过程的最后一步消息中携带第一指示信息,所述第一指示信息用于指示停止另一个随机接入过程;
    所述终端设备停止正在进行的另一个随机接入过程,包括:
    根据所述第一指示信息,所述终端设备停止正在进行的另一个随机接入过程。
  8. 根据权利要求1至7中任一项所述的方法,其特征在于,所述终端设备并行进行2步随机接入过程和4步随机过程,包括:
    所述终端设备所处的状态满足特定状态和/或触发随机接入的事件为特定事件时,所述终端设备并行进行2步随机接入过程和4步随机接入过程。
  9. 根据权利要求8所述的方法,其特征在于,所述特定事件为:
    特定逻辑信道的调度请求;或
    初始接入。
  10. 根据权利要求8或9所述的方法,其特征在于,所述方法还包括:
    所述终端设备接收网络设备发送的第二指示信息;其中,所述第二指示信息指示:
    所述特定状态和/或所述特定事件;或者,
    所述终端设备的各种状态是否是所述终端设备并行进行2步随机接入过程和4步随机接入过程所需的状态,和/或,触发随机接入的各个事件是否触发所述终端设备并行进行2步随机接入过程和4步随机接入过程。
  11. 根据权利要求10所述的方法,其特征在于,所述第二指示信息承载于系统消息中或无线资源控制RRC专用信令中。
  12. 根据权利要求1至11中任一项所述的方法,其特征在于,所述方法还包括:
    所述终端设备接收网络设备发送的第三指示信息,所述第三指示信息指示所述2步随机接入过程的第一随机接入资源;
    所述终端设备接收所述网络设备发送的第四指示信息,所述第四指示信息指示将所述第一随机接入资源中的部分资源作为所述4步随机接入过程的第二随机接入资源。
  13. 根据权利要求12所述的方法,其特征在于,所述第四指示信息通过以下方式指示所述部分资源作为所述第二随机接入资源:
    为所述第一随机接入资源中的其它部分资源配置对应的物理上行共享信道PUSCH资源,以及不为所述部分资源配置对应的PUSCH资源。
  14. 一种通信方法,其特征在于,包括:
    在终端设备并行进行的2步随机接入过程和4步随机接入过程中的一个随机接入过程实现成功接入的情况下,网络设备执行以下操作中的至少一个:
    停止正在进行的另一个随机接入过程,
    在实现成功接入的一个随机接入过程中发送第一指示信息,所述第一指示信息用于指示所述终端设备停止另一个随机接入过程。
  15. 根据权利要求14所述的方法,其特征在于,所述2步随机接入过程中的第一步消息包括第一随机接入前导码和第一负荷部分,其中,在所述2步随机接入过程中传输的所述第一随机接入前导码被复用作为所述4步随机接入过程中的第一步消息中的随机接入前导码。
  16. 根据权利要求14或15所述的方法,其特征在于,所述2步随机接入过程中的第一步消息包括第二随机接入前导码和第二负荷部分,所述4步随机接入过程中的第一步消息包括第三随机接入前导码,所述第二随机接入前导码和所述第三随机接入前导码被分别传输。
  17. 根据权利要求14至16中任一项所述的方法,其特征在于,所述方法还包括:
    所述网络设备向所述终端设备发送第二指示信息;其中,所述第二指示信息指示以下中的至少一种:
    所述终端设备并行进行2步随机接入过程和4步随机接入过程所需满足的特定状态;
    触发所述终端设备并行进行2步随机接入过程和4步随机接入过程的特定触发事件;
    所述终端设备的各种状态是否是所述终端设备并行进行2步随机接入过程和4步随机接入过程所需的状态;
    触发随机接入的各个事件是否触发所述终端设备并行进行2步随机接入过程和4步随机接入过程。
  18. 根据权利要求17所述的方法,其特征在于,所述第二指示信息承载于系统消息中或无线资源控制RRC专用信令中。
  19. 根据权利要求14至18中任一项所述的方法,其特征在于,所述方法还包括:
    所述网络设备向所述终端设备发送第三指示信息,第三指示信息指示所述2步随机接入过程的第一随机接入资源;
    所述网络设备发送第四指示信息,第四指示信息指示将所述第一随机接入资源中的部分资源作为所述4步随机接入过程的第二随机接入资源。
  20. 根据权利要求19所述的方法,其特征在于,所述第四指示信息通过以下方式指示所述部分资源作为所述第二随机接入资源:
    为所述第一随机接入资源中的其它部分资源配置对应的PUSCH资源,以及不为所述部分资源配置对应的PUSCH资源。
  21. 一种终端设备,其特征在于,包括随机接入单元,用于:
    并行进行2步随机接入过程和4步随机接入过程;以及
    在通过所述2步随机接入过程和所述4步随机接入过程中的一个随机接入过程实现成功接入的情况下,停止正在进行的另一个随机接入过程。
  22. 根据权利要求21所述的终端设备,其特征在于,所述随机接入单元进一步用于:
    在所述2步随机接入过程和所述4步随机接入过程中的一个随机接入过程实现接入失败的情况下,继续正在进行的另一个随机接入过程。
  23. 根据权利要求21或22所述的终端设备,其特征在于,所述2步随机接入过程中的第一步消息包括第一随机接入前导码和第一负荷部分,其中,在所述2步随机接入过程中发送的所述第一随机接入前导码被复用作为所述4步随机接入过程中的第一步消息中的随机接入前导码。
  24. 根据权利要求23所述的终端设备,其特征在于,所述随机接入单元进一步用于:
    在所述第一随机接入前导码发送完毕之后,开启第一帧听窗口,以用于帧听所述4步随机接入过程中的第二步消息;
    在所述第一随机接入前导码和所述第一负荷部分发送完毕之后,开启第二帧听窗口,以用于帧听所述2步随机接入过程中的第二步消息。
  25. 根据权利要求21或22所述的终端设备,其特征在于,所述2步随机接入过程中的第一步消息包括第二随机接入前导码和第二负荷部分,所述4步随机接入过程中的第一步消息包括第三随机接入前导码,所述第二随机接入前导码和所述第三随机接入前导码被分别发送。
  26. 根据权利要求25所述的终端设备,其特征在于,所述随机接入单元进一步用于:
    在所述第二随机接入前导码和所述第二负荷部分发送完毕之后,开启第三帧听窗口,以用于帧听所述2步随机接入过程中的第二步消息;
    在所述第三随机接入前导码发送完毕之后,开启第四帧听窗口,以用于帧听所述4步随机接入过程中的第二步消息。
  27. 根据权利要求21至26中任一项所述的终端设备,其特征在于,在实现成功接入的一个随机接入过程的最后一步消息中携带第一指示信息,所述第一指示信息用于指示停止另一个随机接入过程;
    所述随机接入单元进一步用于:
    根据所述第一指示信息,停止正在进行的另一个随机接入过程。
  28. 根据权利要求21至27中任一项所述的终端设备,其特征在于,所述随机接入单元进一步用于:
    所述终端设备所处的状态满足特定状态和/或触发随机接入的事件为特定事件时,并行进行2步随机接入过程和4步随机接入过程。
  29. 根据权利要求28所述的终端设备,其特征在于,所述特定事件为:
    特定逻辑信道的调度请求;或
    初始接入。
  30. 根据权利要求28或29所述的终端设备,其特征在于,还包括接收单元,用于:
    接收网络设备发送的第二指示信息;其中,所述第二指示信息指示:
    所述特定状态和/或所述特定事件;或者,
    所述终端设备的各种状态是否是所述终端设备并行进行2步随机接入过程和4步随机接入过程所需的状态,和/或,触发随机接入的各个事件是否触发所述终端设备并行进行2步随机接入过程和4步随机接入过程。
  31. 根据权利要求30所述的终端设备,其特征在于,所述第二指示信息承载于系统消息中或无线资源控制RRC专用信令中。
  32. 根据权利要求21至31中任一项所述的终端设备,其特征在于,还包括接收单元,用于:
    接收网络设备发送的第三指示信息,所述第三指示信息指示所述2步随机接入过程的第一随机接入资源;
    接收所述网络设备发送的第四指示信息,所述第四指示信息指示将所述第一随机接入资源中的部分资源作为所述4步随机接入过程的第二随机接入资源。
  33. 根据权利要求32所述的终端设备,其特征在于,所述第四指示信息通过以下方式指示所述部分资源作为所述第二随机接入资源:
    为所述第一随机接入资源中的其它部分资源配置对应的物理上行共享信道PUSCH资源,以及不为所述部分资源配置对应的PUSCH资源。
  34. 一种网络设备,其特征在于,包括随机接入单元,用于:
    在终端设备并行进行的2步随机接入过程和4步随机接入过程中的一个随机接入过程实现成功接入的情况下,执行以下操作中的至少一个:
    停止正在进行的另一个随机接入过程,
    在实现成功接入的一个随机接入过程中发送第一指示信息,所述第一指示信息用于指示所述终端设备停止另一个随机接入过程。
  35. 根据权利要求34所述的网络设备,其特征在于,所述2步随机接入过程中的第一步消息包括第一随机接入前导码和第一负荷部分,其中,在所述2步随机接入过程中传输的所述第一随机接入前导码被复用作为所述4步随机接入过程中的第一步消息中的随机接入前导码。
  36. 根据权利要求34或35所述的网络设备,其特征在于,所述2步随机接入过程中的第一步消息包括第二随机接入前导码和第二负荷部分,所述4步随机接入过程中的第一步消息包括第三随机接入前导码,所述第二随机接入前导码和所述第三随机接入前导码被分别传输。
  37. 根据权利要求34至36中任一项所述的网络设备,其特征在于,还包括发送单元,用于:
    向所述终端设备发送第二指示信息;其中,所述第二指示信息指示以下中的至少一种:
    所述终端设备并行进行2步随机接入过程和4步随机接入过程所需满足的特定状态;
    触发所述终端设备并行进行2步随机接入过程和4步随机接入过程的特定触发事件;
    所述终端设备的各种状态是否是所述终端设备并行进行2步随机接入过程和4步随机接入过程所需的状态;
    触发随机接入的各个事件是否触发所述终端设备并行进行2步随机接入过程和4步随机接入过程。
  38. 根据权利要求37所述的网络设备,其特征在于,所述第二指示信息承载于系统消息中或无线资源控制RRC专用信令中。
  39. 根据权利要求34至38中任一项所述的网络设备,其特征在于,还包括发送单元,用于:
    发送第三指示信息,第三指示信息指示所述2步随机接入过程的第一随机接入资源;
    发送第四指示信息,第四指示信息指示将所述第一随机接入资源中的部分资源作为所述4步随机接入过程的第二随机接入资源。
  40. 根据权利要求39所述的网络设备,其特征在于,所述第四指示信息通过以下方式指示所述部分资源作为所述第二随机接入资源:
    为所述第一随机接入资源中的其它部分资源配置对应的PUSCH资源,以及不为所述部分资源配置对应的PUSCH资源。
  41. 一种终端设备,其特征在于,包括:处理器和收发器,所述处理器用于控制所述收发器执行如权利要求1至13中任一项所述的方法。
  42. 一种网络设备,其特征在于,包括:处理器和收发器,所述处理器用于控制所 述收发器执行如权利要求14至20中任一项所述的方法。
  43. 一种通信装置,其特征在于,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通过收发器执行如权利要求1至20中任一项所述的方法。
  44. 一种计算机可读存储介质,其特征在于,用于存储计算机程序,所述计算机程序使得计算机通过收发器执行如权利要求1至20中任一项所述的方法。
  45. 一种计算机程序产品,其特征在于,包括计算机程序指令,该计算机程序指令使得计算机通过收发器执行如权利要求1至20中任一项所述的方法。
  46. 一种计算机程序,其特征在于,所述计算机程序使得计算机通过收发器执行如权利要求1至20中任一项所述的方法。
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