WO2020220252A1 - 一种随机接入方法、设备及存储介质 - Google Patents

一种随机接入方法、设备及存储介质 Download PDF

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Publication number
WO2020220252A1
WO2020220252A1 PCT/CN2019/085155 CN2019085155W WO2020220252A1 WO 2020220252 A1 WO2020220252 A1 WO 2020220252A1 CN 2019085155 W CN2019085155 W CN 2019085155W WO 2020220252 A1 WO2020220252 A1 WO 2020220252A1
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WIPO (PCT)
Prior art keywords
parameter
random access
timer
terminal device
connected state
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PCT/CN2019/085155
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English (en)
French (fr)
Inventor
石聪
Original Assignee
Oppo广东移动通信有限公司
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.)
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Application filed by Oppo广东移动通信有限公司 filed Critical Oppo广东移动通信有限公司
Priority to PCT/CN2019/085155 priority Critical patent/WO2020220252A1/zh
Priority to CN201980073845.4A priority patent/CN112970318B/zh
Publication of WO2020220252A1 publication Critical patent/WO2020220252A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access, e.g. scheduled or random access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access, e.g. scheduled or random access
    • H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]

Definitions

  • the present invention relates to the field of wireless communication technology, and in particular to a random access method, equipment and storage medium.
  • a terminal device establishes a wireless link with a network device through random access (Random Access Channel, RACH). Therefore, how the terminal device can perform random access to improve the efficiency of random access is a problem to be solved.
  • RACH Random Access Channel
  • embodiments of the present invention provide a random access method, device, and storage medium.
  • a terminal device performs random access, the efficiency of random access can be improved.
  • an embodiment of the present invention provides a random access method, including: a terminal device acquires a first parameter of a timer, where the value of the first parameter of the timer is less than the value of the second parameter of the timer; The terminal device determines whether to restart random access based on the first parameter of the timer.
  • an embodiment of the present invention provides a random access method, including: a network device sends a first parameter, where the first parameter is used by the terminal device to determine the first parameter of a timer, and the first parameter of the timer The value of is smaller than the value of the second parameter of the timer, and the first parameter of the timer is used by the terminal device to determine whether to restart random access.
  • an embodiment of the present invention provides a terminal device, including: a processing unit configured to obtain a first parameter of a timer; based on the first parameter of the timer, it is determined whether to restart random access, and the timing The value of the first parameter of the timer is smaller than the value of the second parameter of the timer.
  • an embodiment of the present invention provides a network device, the network device includes: a sending unit configured to send a first parameter, where the first parameter is used by the terminal device to determine the first parameter of a timer, and the timing The value of the first parameter of the timer is smaller than the value of the second parameter of the timer, and the first parameter of the timer is used by the terminal device to determine whether to restart random access.
  • an embodiment of the present invention provides a terminal device, including a processor and a memory for storing a computer program that can run on the processor, wherein the processor is used to execute the above-mentioned terminal when the computer program is running. The steps of the random access method performed by the device.
  • an embodiment of the present invention provides a network device, including a processor and a memory for storing a computer program that can run on the processor, wherein the processor is used to execute the above network when the computer program is running. The steps of the random access method performed by the device.
  • an embodiment of the present invention provides a storage medium that stores an executable program, and when the executable program is executed by a processor, it implements the random access method executed by the terminal device.
  • an embodiment of the present invention provides a storage medium storing an executable program, and when the executable program is executed by a processor, the random access method executed by the above-mentioned network device is implemented.
  • the random access method provided by the embodiment of the present invention includes: a terminal device acquires a first parameter of a timer, and the value of the first parameter of the timer is smaller than the value of the second parameter of the timer; and the terminal device is based on the The first parameter of the timer determines whether to restart RACH.
  • the terminal device can use a shorter timer to resolve conflicts; in conflict resolution In the case of failure, the terminal device can quickly perform the next RACH; in this way, the delay of random access can be reduced and the efficiency of RACH can be improved.
  • Figure 1 is a schematic diagram of the processing flow of the second type of random access according to the present invention.
  • FIG. 2 is a schematic diagram of the structure of the RAR of the present invention.
  • Figure 3a is a schematic diagram of a format of the subheader of the present invention.
  • Figure 3b is a schematic diagram of another format of the subheader of the present invention.
  • FIG. 4 is a schematic diagram of the structure of MAC PDU composed of RAR according to the present invention.
  • FIG. 5 is a schematic diagram of the processing flow of the first type of random access in the present invention
  • FIG. 6 is a schematic diagram of the composition structure of a communication system according to an embodiment of the present invention.
  • FIG. 7 is a schematic diagram of an optional processing flow of a random access method provided by an embodiment of the present invention.
  • FIG. 8 is a schematic diagram of the composition structure of a terminal device provided by an embodiment of the present invention.
  • FIG. 9 is a schematic diagram of the composition structure of a network device provided by an embodiment of the present invention.
  • FIG. 10 is a schematic diagram of the hardware composition structure of an electronic device according to an embodiment of the present invention.
  • RACH includes: Type 1 random access and Type 2 random access.
  • the first type of random access in the first type of random access, the terminal device and the network device need to perform two information exchanges. Therefore, the first type of random access is also called 2-steps RACH.
  • the second type of random access the terminal device and the network device need to perform 4 information exchanges; therefore, the second type of random access is also called 4-steps RACH.
  • random access includes contention-based random access and non-contention-based random access.
  • random access includes the first type of random access and the second type of random access. The following briefly describes the first type of random access and the second type of random access.
  • the processing flow of the second type of random access includes the following four steps:
  • Step S101 The terminal device sends a random access preamble to the network device through Msg1.
  • the terminal device sends the selected Preamble on the selected PRACH time domain resource; the network device can estimate the uplink Timing and the size of the uplink authorization required for the terminal device to transmit Msg3 based on the Preamble.
  • Step S102 After detecting that a terminal device sends a preamble, the network device sends a random access response (Random Access Response, RAR) message to the terminal device through Msg2 to inform the terminal device of the uplink resource information that can be used when sending Msg3.
  • RAR Random Access Response
  • the equipment allocates a temporary radio network temporary identity (RNTI) to provide time advance command for terminal equipment.
  • RNTI temporary radio network temporary identity
  • the terminal device After sending Msg1, the terminal device opens a RAR window and detects PDCCH in the RAR window; the detected PDCCH is scrambled with RA-RNTI, and the RA-RNTI calculation formula is as follows:
  • RA-RNTI 1+s_id+14 ⁇ t_id+14 ⁇ 80 ⁇ f_id+14 ⁇ 80 ⁇ 8 ⁇ ul_carrier_id;
  • RA-RNTI is related to PRACH time-frequency resources.
  • RAR structure diagram as shown in Figure 2, RAR includes subheader (subheader), RAPID, payload, uplink (UpLinkUL) grant (grant) and Temporary C-RNTI; among them, the format diagram of subheader, as shown in Figure 3a and Figure 3b As shown, BI is used to indicate the backoff time of retransmitting Msg1.
  • MAC PDU Media Access Control Protocol Data Unit
  • Step S103 After receiving the RAR message, the terminal device sends Msg3 in the uplink resource specified by the RAR message.
  • the message of Msg3 is mainly used to notify the network device of what event triggered the RACH process. For example, if it is an initial random access event, the terminal device ID and establishment cause will be carried in Msg3; if it is an RRC reestablishment event, the connected terminal device identification and establishment cause will be carried in Msg3.
  • Step S104 The network device sends Msg4 to the terminal device, and Msg4 includes a contention resolution message, and at the same time allocates uplink transmission resources for the terminal device.
  • the terminal device When the terminal device receives the Msg4 sent by the network device, it will detect whether the terminal device specific temporary identifier sent by the terminal device in Msg3 is included in the contention resolution message sent by the base station. If it is included, it indicates that the terminal device random access process is successful, otherwise it is considered random If the process fails, the terminal device needs to initiate the random access process again from the first step.
  • Msg4 Another function of Msg4 is to send radio resource control (Radio Resource Control, RRC) configuration messages to terminal devices.
  • RRC Radio Resource Control
  • the first way is: if the terminal device carries the Cell Radio Network Tempory Identity (C-RNTI) in Msg3, Msg4 uses C-RNTI scrambled Physical Downlink Control Channel (Physical Downlink Control Channel, PDCCH) scheduling.
  • the second method is: if the terminal device does not carry C-RNTI in Msg3, such as the terminal device is initial access, Msg4 uses TC-RNTI scrambled PDCCH scheduling; conflict resolution is to receive the physical downlink of Msg4 through the terminal device
  • the Shared Channel Physical Downlink Shared Channel, PDSCH
  • CCCH Common Control Channel
  • SDU Service Data Unit
  • the message content carried by Msg1, Msg2, Msg3, and Msg4 in the second type of random access is shown in Table 1.
  • the above-mentioned RACH process requires four information exchanges between the network equipment and the terminal equipment to complete, resulting in the time extension of the RACH process; in order to solve the problem of the time extension of the RACH process, the first type of random access and the first type of random access processing are proposed
  • the process as shown in Figure 5, includes the following steps:
  • Step S201 The terminal device sends MsgA to the network device.
  • MsgA is composed of Preamble and payload.
  • the preamble is the same as the preamble in the second type of random access, and the preamble is transmitted on the PRACH resource;
  • the information carried in the payload is the same as the information in the Msg3 in the second type of random access, for example, when the RRC is in an idle state
  • the payload can be transmitted by the Physical Uplink Shared Channel (PUSCH).
  • PUSCH Physical Uplink Shared Channel
  • the results of receiving MsgA by the network device may include the following two types: the first type, the network device successfully decodes one or more preambles; the second type, the network device successfully decodes one or more preambles and one or more payloads.
  • Step S202 The terminal device receives the MsgB sent by the network device.
  • MsgB includes the content of Msg2 and Msg4 in the second type of random access.
  • the terminal device obtains the parameters of the target cell through system messages, or when adding Scell or SCG, or when cell handover, to obtain the contention resolution timer (contention resolution timer). , And monitor contention resolution messages sent by network equipment within the duration of contention resolution timer. No matter which method the terminal device obtains the contention resolution timer parameter through the above method, the terminal device uses the only contention resolution timer parameter; regardless of the idle state or the inactive state transfer access, or the connected state In RACH, the terminal equipment uses the unique contention resolution timer parameter.
  • the network device that receives the request during the initial access, or connection reestablishment, or connection recovery process needs to go to the core network or other network entities (such as other network devices) to obtain some context information of the terminal device. Therefore, if the Msg4 contains an unlimited resource control (Radio Resource Control, RRC) message, the Msg4 requires a longer preparation time; accordingly, in order to ensure the success of the RACH, the network device needs to configure a longer contention resolution timer. However, for the terminal device in the connected state, since the Msg4 does not need to contain the RRC message, the terminal device does not need to wait too much time to receive the Msg4.
  • RRC Radio Resource Control
  • the use of a unique, long-duration timer will cause: when the connected terminal device triggers the random access process, if it does not receive the contention resolution message (that is, it does not receive the PDCCH scheduled by the C-RNTI), Then the terminal device needs to wait for the contention resolution timer to expire before starting the next RACH attempt, which will greatly increase the delay of RACH access and reduce the efficiency of RACH.
  • the random access method in the embodiments of this application can be applied to various communication systems, such as: Global System of Mobile Communication (GSM) system, multiple code division Address (Code Division Multiple Access, CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system , LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (TDD), Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access, WiMAX) communication system or 5G system, etc.
  • GSM Global System of Mobile Communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • 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, WiMAX
  • the communication system 100 applied in the embodiment of the present application is shown in FIG. 6.
  • 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), it can also be the base station (gNB) in the NR/5G system, or the radio controller in the Cloud Radio Access Network (CRAN), or the network equipment can For mobile switching centers, relay stations, access points, in-vehicle devices, wearable devices, hubs, switches, bridges, routers, network side devices in 5G networks, or future evolution of public land mobile networks (Public Land Mobile Network, PLMN) Network equipment, etc.
  • BTS Base Transceiver Station
  • NodeB NodeB
  • NB base station
  • WCDMA Wideband Code Division Multiple Access
  • LTE Long Term Evolutional Node B
  • eNB evolved base station in an LTE system
  • LTE Long Term Evolution
  • 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 6 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 with communication functions and a terminal device 120.
  • 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.
  • An optional processing procedure of the random access method provided by the embodiment of the present invention, as shown in FIG. 7, includes the following steps:
  • Step S301 The terminal device obtains a first parameter of a timer, and the value of the first parameter of the timer is less than the value of the second parameter of the timer;
  • the second parameter of the timer is the parameter of the timer in the prior art, and is obtained by the terminal device through a system message.
  • the first parameter of the timer is a newly added timer parameter.
  • the terminal device may obtain the first parameter of the timer through a system message.
  • the network device broadcasts the first parameter of the timer and the second parameter of the timer through a system message, and the terminal device obtains the first parameter of the timer and the second parameter of the timer by receiving the system message; the timer
  • the first parameter of and the second parameter of the timer are both parameters that characterize the duration of the timer.
  • the terminal device obtains two parameters representing the duration of the timer (the first parameter of the timer and the second parameter of the timer).
  • the terminal device uses the first parameter of the timer : Random access triggered by terminal equipment in idle or inactive state based on system information (SI) request (request), random access triggered by terminal equipment in connected state based on scheduling request (Scheduling Request, SR), The terminal device in the connected state triggers random access based on beam failure recovery, and the terminal device in the connected state triggers random access based on the PDCCH order.
  • SI system information
  • SR scheduling request
  • the terminal device in the connected state triggers random access based on beam failure recovery
  • the terminal device in the connected state triggers random access based on the PDCCH order.
  • the terminal device ignores the second parameter of the timer.
  • the SI request is Msg3-based SI request; the terminal device in the connected state triggers contention based random access (CBRA) random access based on the PDCCH order.
  • CBRA contention based random access
  • the terminal device obtains the second parameter of the timer through a system message, and uses a system message, or RRC dedicated signaling, or through a protocol to agree on a scaling factor, and the value of the scaling factor is less than 1; the terminal device calculates the timer The product of the second parameter of and the scaling factor to obtain the first parameter of the timer.
  • the terminal device obtains two parameters representing the duration of the timer (the first parameter of the timer and the second parameter of the timer).
  • the terminal device uses the first parameter of the timer : Random access triggered by SI request based on terminal equipment in idle or inactive state, random access based on SR triggered by terminal equipment in connected state, random access based on beam failure recovery triggered by terminal equipment in connected state, and The terminal equipment in the connected state is based on random access triggered by the PDCCH order.
  • the SI request is Msg3-based SI request; the terminal device in the connected state is based on the CBRA random access triggered by the PDCCH order.
  • the terminal device may obtain the first parameter of the timer through RRC dedicated signaling.
  • the network device broadcasts the first parameter of the timer through a system message, and sends the second parameter of the timer through RRC dedicated signaling; the terminal device receives the first parameter of the timer and the second parameter of the timer; Both the first parameter of the timer and the second parameter of the timer are parameters that characterize the duration of the timer.
  • the RRC dedicated signaling is an RRC reconfiguration message.
  • the terminal device obtains two parameters representing the duration of the timer (the first parameter of the timer and the second parameter of the timer).
  • the terminal device uses the first parameter of the timer : Random access triggered by terminal devices in the connected state based on SR, random access based on beam failure recovery triggered by terminal devices in connected state, and random access based on PDCCH order triggered by terminal devices in connected state.
  • the terminal device uses the first parameter of the timer to trigger the timer to cover the second parameter of the timer.
  • the terminal device leaves the connected state, the terminal device resumes using the second parameter of the timer, that is, the terminal device uses the second parameter of the timer to trigger the timer.
  • the SI request is Msg3-based SI request; the terminal device in the connected state is based on the CBRA random access triggered by the PDCCH order.
  • the terminal device in the connected state uses the first parameter of the timer received through the RRC dedicated signaling to trigger Timer: When the terminal device leaves the connected state, the first parameter of the timer received through the system message is used to trigger the timer.
  • Step S302 The terminal device judges whether to restart random access based on the first parameter of the timer.
  • the terminal device starts a timer based on the first parameter of the timer, and monitors the contention resolution message within the duration of the timer; the content resolution message is not monitored within the duration of the timer In this case, the terminal device determines to restart random access.
  • the contention resolution message is a PDCCH scheduled by C-RNTI.
  • a shorter timer parameter (the first parameter of the timer) is added; for the random access process In Msg4, Msg4 does not need to include the RRC message scenario, the terminal device can use a shorter timer parameter to resolve the contention conflict; in the case of a contention failure, the next RACH attempt can be performed quickly, thereby shortening the RACH access time Delay to improve the efficiency of RACH.
  • the configuration of MsgB window can also be added to the 2-step RACH.
  • the terminal device uses the network device configuration to Short MsgB window.
  • the random access is any one of the following: a 2-step random access triggered by a terminal device in the idle or inactive state based on SI request, and a 2-step random access triggered by a terminal device in the connected state based on SR.
  • the terminal device in the connected state is based on the 2-step random access triggered by beam failure recovery, and the terminal device in the connected state is based on the 2-step random access triggered by the PDCCH order.
  • the newly added MsgB window may be notified to the terminal device by the network device through a system message or RRC dedicated signaling.
  • an embodiment of the present invention also provides a terminal device.
  • the composition structure of the terminal device is shown in FIG. 8, and the terminal device 400 includes:
  • the processing unit 401 is configured to obtain the first parameter of the timer; and determine whether to restart random access based on the first parameter of the timer, and the value of the first parameter of the timer is less than that of the second parameter of the timer. value.
  • the first parameter of the timer and the second parameter of the timer are obtained through system information.
  • the processing unit 401 is further configured to ignore the second parameter of the timer.
  • the value of the first parameter of the timer is the product of the value of the second parameter of the timer and the scaling factor.
  • the scaling factor is obtained through system information
  • the scaling factor is acquired through RRC dedicated signaling
  • the scaling factor is a fixed value agreed by the agreement.
  • the random access includes any one of the following:
  • the terminal equipment in the connected state is based on random access triggered by the PDCCH order.
  • the second parameter of the timer is obtained through system information
  • the first parameter of the timer is obtained through RRC dedicated signaling.
  • the processing unit 401 is further configured to use the first parameter of the timer to cover the second parameter of the timer.
  • the random access includes any one of the following:
  • the terminal equipment in the connected state is based on random access triggered by the PDCCH order.
  • the random access includes any one of the following:
  • the terminal equipment in the connected state is based on random access triggered by the PDCCH order.
  • the processing unit is further configured to determine whether to restart random access based on the second parameter of the timer.
  • the processing unit 401 is configured to start a timer based on the first parameter of the timer, and monitor contention resolution messages within the duration of the timer;
  • contention resolution message is not monitored within the duration of the timer, it is determined to restart random access.
  • the random access is a 4-step random access based on contention.
  • an embodiment of the present invention also provides a network device.
  • the composition structure of the network device is shown in FIG. 9, and the network device 500 includes:
  • the sending unit 501 is configured to send a first parameter, where the first parameter is used by the terminal device to determine a first parameter of a timer, and the value of the first parameter of the timer is less than the value of the second parameter of the timer.
  • the first parameter of the timer is used for the terminal device to determine whether to restart random access.
  • the second parameter and the first parameter of the timer are sent through system information.
  • the first parameter is the first parameter or the scaling factor of the timer.
  • the value of the first parameter of the timer is a product of the value of the second parameter of the timer and the scaling factor.
  • the terminal equipment in the connected state is based on random access triggered by the PDCCH order.
  • the first parameter is the first parameter of the timer sent by RRC dedicated signaling.
  • the random access includes any one of the following: random access triggered by the terminal device in the connected state based on a scheduling request; random access triggered by the terminal device in the connected state based on beam failure repair; and The terminal equipment in the state is based on random access triggered by the PDCCH order.
  • the second parameter of the timer is used for the terminal device to determine whether to restart random access.
  • the random access is a 4-step random access based on contention.
  • An embodiment of the present invention also provides a terminal device, including a processor and a memory for storing a computer program that can run on the processor, where the processor is used to execute the above-mentioned terminal device when the computer program is running. Steps of random access method.
  • An embodiment of the present invention also provides a network device, including a processor and a memory for storing a computer program that can run on the processor, where the processor is used to execute the above-mentioned network device when the computer program is running. Steps of random access method.
  • the electronic device 700 includes: at least one processor 701, a memory 702, and at least one network interface 704.
  • the various components in the electronic device 700 are coupled together through the bus system 705. It can be understood that the bus system 705 is used to implement connection and communication between these components.
  • the bus system 705 also includes a power bus, a control bus, and a status signal bus. However, for clarity of description, various buses are marked as the bus system 705 in FIG. 10.
  • the memory 702 may be a volatile memory or a non-volatile memory, and may also include both volatile and non-volatile memory.
  • the non-volatile memory may be ROM, Programmable Read-Only Memory (PROM), Erasable Programmable Read-Only Memory (EPROM), and electrically erasable Programmable read-only memory (EEPROM, Electrically Erasable Programmable Read-Only Memory), magnetic random access memory (FRAM, ferromagnetic random access memory), flash memory (Flash Memory), magnetic surface memory, optical disk, or CD-ROM -ROM, Compact Disc Read-Only Memory); Magnetic surface memory can be disk storage or tape storage.
  • the volatile memory may be random access memory (RAM, Random Access Memory), which is used as an external cache.
  • RAM random access memory
  • SRAM static random access memory
  • SSRAM synchronous static random access memory
  • DRAM Dynamic Random Access Memory
  • SDRAM Synchronous Dynamic Random Access Memory
  • DDRSDRAM Double Data Rate Synchronous Dynamic Random Access Memory
  • ESDRAM enhanced -Type synchronous dynamic random access memory
  • SLDRAM SyncLink Dynamic Random Access Memory
  • direct memory bus random access memory DRRAM, Direct Rambus Random Access Memory
  • DRRAM Direct Rambus Random Access Memory
  • the memory 702 described in the embodiment of the present invention is intended to include, but is not limited to, these and any other suitable types of memory.
  • the memory 702 in the embodiment of the present invention is used to store various types of data to support the operation of the electronic device 700. Examples of these data include: any computer program used to operate on the electronic device 700, such as the application program 7022.
  • the program for implementing the method of the embodiment of the present invention may be included in the application program 7022.
  • the method disclosed in the foregoing embodiment of the present invention may be applied to the processor 701 or implemented by the processor 701.
  • the processor 701 may be an integrated circuit chip with signal processing capabilities. In the implementation process, the steps of the foregoing method can be completed by hardware integrated logic circuits in the processor 701 or instructions in the form of software.
  • the aforementioned processor 701 may be a general-purpose processor, a digital signal processor (DSP, Digital Signal Processor), or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc.
  • the processor 701 may implement or execute various methods, steps, and logical block diagrams disclosed in the embodiments of the present invention.
  • the general-purpose processor may be a microprocessor or any conventional processor.
  • the steps of the method disclosed in the embodiments of the present invention can be directly embodied as being executed and completed by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor.
  • the software module may be located in a storage medium, and the storage medium is located in the memory 702.
  • the processor 701 reads the information in the memory 702 and completes the steps of the foregoing method in combination with its hardware.
  • the electronic device 700 may be used by one or more application specific integrated circuits (ASIC, Application Specific Integrated Circuit), DSP, programmable logic device (PLD, Programmable Logic Device), and complex programmable logic device (CPLD). , Complex Programmable Logic Device), FPGA, general-purpose processor, controller, MCU, MPU, or other electronic components to implement the foregoing method.
  • ASIC Application Specific Integrated Circuit
  • DSP digital signal processor
  • PLD programmable logic device
  • CPLD complex programmable logic device
  • FPGA field-programmable Logic Device
  • controller MCU
  • MPU or other electronic components to implement the foregoing method.
  • the embodiment of the present application also provides a storage medium for storing computer programs.
  • the storage medium can be applied to the terminal device in the embodiment of the present application, and the computer program causes the computer to execute the corresponding process in each method of the embodiment of the present application.
  • the computer program causes the computer to execute the corresponding process in each method of the embodiment of the present application.
  • the 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 in each method of the embodiment of the present application.
  • the computer program causes the computer to execute the corresponding process in each method of the embodiment of the present application.
  • These computer program instructions can also be stored in a computer-readable memory that can guide a computer or other programmable data processing equipment to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction device.
  • the device implements the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.
  • These computer program instructions can also be loaded on a computer or other programmable data processing equipment, so that a series of operation steps are executed on the computer or other programmable equipment to produce computer-implemented processing, so as to execute on the computer or other programmable equipment.
  • the instructions provide steps for implementing functions specified in a flow or multiple flows in the flowchart and/or a block or multiple blocks in the block diagram.

Abstract

本发明公开了一种随机接入方法，包括：终端设备获取定时器的第一参数，所述定时器的第一参数的值小于定时器的第二参数的值；所述终端设备基于所述定时器的第一参数，判断是否重新启动随机接入。本发明还公开了另一种随机接入方法、终端设备、网络设备及存储介质。

Description

一种随机接入方法、设备及存储介质 技术领域
本发明涉及无线通信技术领域，尤其涉及一种随机接入方法、设备及存储介质。
背景技术
相关技术中，终端设备通过随机接入(Random Access Channel，RACH)建立与网络设备之间的无线链路。因此，终端设备如何进行随机接入，才能够提高随机接入的效率是有待解决的问题。
发明内容
为解决上述技术问题，本发明实施例提供一种随机接入方法、设备及存储介质，终端设备进行随机接入时，能够提高随机接入的效率。
第一方面，本发明实施例提供一种随机接入方法，包括：终端设备获取定时器的第一参数，所述定时器的第一参数的值小于定时器的第二参数的值；所述终端设备基于所述定时器的第一参数，判断是否重新启动随机接入。
第二方面，本发明实施例提供一种随机接入方法，包括：网络设备发送第一参数，所述第一参数用于终端设备确定定时器的第一参数，所述定时器的第一参数的值小于定时器的第二参数的值，所述定时器的第一参数用于所述终端设备判断是否重新启动随机接入。
第三方面，本发明实施例提供一种终端设备，包括：处理单元，配置为获取定时器的第一参数；基于所述定时器的第一参数，判断是否重新启动随机接入，所述定时器的第一参数的值小于定时器的第二参数的值。
第四方面，本发明实施例提供一种网络设备，所述网络设备包括：发送单元，配置为发送第一参数，所述第一参数用于终端设备确定定时器的第一参数，所述定时器的第一参数的值小于定时器的第二参数的值，所述定时器的第一参数用于所述终端设备判断是否重新启动随机接入。
第五方面，本发明实施例提供一种终端设备，包括处理器和用于存储能够在处理器上运行的计算机程序的存储器，其中，所述处理器用于运行所述计算机程序时，执行上 述终端设备执行的随机接入方法的步骤。
第六方面，本发明实施例提供一种网络设备，包括处理器和用于存储能够在处理器上运行的计算机程序的存储器，其中，所述处理器用于运行所述计算机程序时，执行上述网络设备执行的随机接入方法的步骤。
第七方面，本发明实施例提供一种存储介质，存储有可执行程序，所述可执行程序被处理器执行时，实现上述终端设备执行的随机接入方法。
第八方面，本发明实施例提供一种存储介质，存储有可执行程序，所述可执行程序被处理器执行时，实现上述网络设备执行的随机接入方法。
本发明实施例提供的随机接入方法，包括：终端设备获取定时器的第一参数，所述定时器的第一参数的值小于定时器的第二参数的值；所述终端设备基于所述定时器的第一参数，判断是否重新启动RACH。由于所述第一定时器的第一参数的值小于定时器的第二参数的值，利用两者中的较小者启动定时器，在定时器的时长内监听竞争解决消息，以判断终端设备是否重新启动RACH；使得特定的场景(如随机接入过程中消息(Message 4，Msg4)不需要包括RRC消息的场景)，终端设备能够使用较短的定时器的时长来解决冲突；在解决冲突失败的情况下，终端设备能够快速地进行下一次RACH；如此，能够缩小随机接入的时延，提高RACH的效率。
附图说明
图1为本发明第二类随机接入的处理流程示意图；
图2为本发明RAR的结构示意图；
图3a为本发明subheader的一种格式示意图；
图3b为本发明subheader的另一种格式示意图；
图4为本发明由RAR组成的MAC PDU的结构示意图；
图5为本发明第一类随机接入的处理流程示意图
图6为本发明实施例通信系统的组成结构示意图；
图7为本发明实施例提供的随机接入方法的可选处理流程示意图；
图8为本发明实施例提供的终端设备的组成结构示意图；
图9为本发明实施例提供的网络设备的组成结构示意图；
图10为本发明实施例电子设备的硬件组成结构示意图。
具体实施方式
为了能够更加详尽地了解本发明实施例的特点和技术内容，下面结合附图对本发明实施例的实现进行详细阐述，所附附图仅供参考说明之用，并非用来限定本发明实施例。
在对本发明实施例提供的随机接入方法进行详细说明之前，先对第一类随机接入和第二类随机接入分别进行简要说明。
在新无线(New Radio，NR)系统中，RACH包括：第一类随机接入和第二类随机接入。其中，第一类随机接入中，终端设备与网络设备之间需要执行2次信息交互，因此，第一类随机接入也称为两步随机接入(2-steps RACH)。第二类随机接入中，终端设备与网络设备之间需要执行4次信息交互；因此，第二类随机接入也称为四步随机接入(4-steps RACH)。按照随机接入方式的不同，随机接入包括基于竞争的随机接入和基于非竞争的随机接入。按照随机接入类型的不同，随机接入包括第一类随机接入和第二类随机接入。下面对第一类随机接入和第二类随机接入分别进行简要说明。
第二类随机接入的处理流程，如图1所示，包括如下四个步骤：
步骤S101，终端设备通过Msg 1向网络设备发送随机接入Preamble。
终端设备在选择的PRACH时域资源上发送选择的Preamble；网络设备根据Preamble能够估算上行Timing以及终端设备传输Msg3所需要的上行授权的大小。
步骤S102，网络设备检测到有终端设备发送Preamble之后，通过Msg2向终端设备发送随机接入响应(Random Access Response,RAR)消息，以告知终端设备在发送Msg3时可以使用的上行资源信息，为终端设备分配临时的无线网络临时标识(Radio Network Tempory Identity，RNTI)，为终端设备提供time advance command等。
终端设备在发送Msg1之后，开启一个RAR窗口，在RAR窗口内检测PDCCH；检测到的PDCCH用RA-RNTI加扰，RA-RNTI的计算公式如下述所示：
RA-RNTI＝1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id；
根据上述公式可知，RA-RNTI与PRACH时频资源有关。
RAR的结构示意图，如图2所示，RAR包括子报头(subheader)、RAPID、payload、上行(UpLinkUL)授权(grant)和Temporary C-RNTI；其中，subheader的格式示意图，如图3a和图3b所示，其中，BI用于指示重传Msg1的回退时间。由RAR组成的媒体接入控制协议数据单元(Media Access Control Protocol Data Unit，MAC PDU)的结构示意图，如图4所示，一个RAP ID对应一个MAC RAR。
步骤S103，终端设备接收到RAR消息之后，在RAR消息所指定的上行资源中发 送Msg3。
其中，Msg3的消息主要用于通知网络设备该RACH过程是由什么事件触发。举例来说，如果是初始随机接入事件，则在Msg3中会携带终端设备ID和establishment cause；如果是RRC重建事件，则在Msg3中会携带连接态的终端设备标识和establishment cause。
同时，Msg3携带的ID可以是的竞争冲突在步骤S104中得到解决。
步骤S104，网络设备向终端设备发送Msg4，Msg4中包括竞争解决消息，同时为终端设备分配上行传输资源。
终端设备接收到网络设备发送的Msg4时，会检测终端设备在Msg3发送的终端设备特定临时标识是否包含在基站发送的竞争解决消息中，若包含则表明终端设备随机接入过程成功，否则认为随机过程失败，终端设备需要再次从第一步开始发起随机接入过程。
Msg4的另一个作用是向终端设备发送无线资源控制(Radio Resource Control，RRC)配置消息。
竞争冲突解决包括两种方式；其中，第一种方式是：如果终端设备在Msg3中携带了小区无线网络临时标识(Cell Radio Network Tempory Identity，C-RNTI)，则Msg4用C-RNTI加扰的物理下行控制信道(Physical Downlink Control Channel，PDCCH)调度。第二种方式是：如果终端设备在Msg3中没有携带C-RNTI，如终端设备是初始接入，则Msg4用TC-RNTI加扰的PDCCH调度；冲突的解决是通过终端设备接收Msg4的物理下行共享信道(Physical Downlink Shared Channel，PDSCH)，匹配PDSCH中的公共逻辑信道(Common Control Channel，CCCH)服务数据单元(Service Data Unit，SDU)实现。
第二类随机接入中Msg1、Msg2、Msg3和Msg4所携带的消息内容，如表1所示。
Figure PCTCN2019085155-appb-000001
Figure PCTCN2019085155-appb-000002
表1
上述RACH过程需要经过网络设备与终端设备进行四次信息交互来完成，导致RACH过程的时延长；为解决RACH过程时延长的问题，提出第一类随机接入，第一类随机接入的处理流程，如图5所示，包括以下步骤：
步骤S201，终端设备向网络设备发送MsgA。
MsgA由Preamble和payload组成。可选地，Preamble与第二类随机接入中的Preamble相同，该Preamble在PRACH资源上传输；payload携带的信息与第二类随机 接入中Msg3中的信息相同，比如RRC处于空闲态时的RRC信令，以及RRC处于连接态时的C-RNTI，payload可由物理上行共享信道(Physical Uplink Shared Channel，PUSCH)传输。
网络设备接收MsgA的结果可能包括如下两种：第一种，网络设备成功解码出一个或多个Preamble；第二种，网络设备成功解码出一个或多个Preamble，以及一个或多个payload。
步骤S202，终端设备接收网络设备发送的MsgB。
可选地，MsgB包括第二类随机接入中Msg2和Msg4的内容。
相关技术中，对于第二类随机接入，终端设备在通过系统消息、或在添加Scell或SCG时、或在小区切换时获得目标小区的参数等方式，获得竞争解决定时器(contention resolution timer)的参数，并在contention resolution timer的时长内监听网络设备发送的竞争解决消息。无论终端设备通过上述哪种方式获得contention resolution timer的参数，终端设备都使用唯一的contention resolution timer参数；无论空闲(idle)状态或非激活(inactive)状态的转移接入，还是连接(connected)状态中的RACH，终端设备均使用唯一的contention resolution timer参数。
在初始接入、或连接重建、或连接恢复过程中收到请求的网络设备需要去核心网或其他网络实体(例如其他网络设备)获取终端设备的一些上下文(context)信息。因此，如果Msg4中包含无限资源控制(Radio Resource Control，RRC)消息，那么Msg4需要较长的准备时间；相应的，为了保证RACH成功，网络设备需要配置较长的竞争解决定时器的时长。然而，对于连接状态的终端设备而言，由于Msg4中不需要包含RRC消息，终端设备接收Msg4则不需要等待太多的时间。相关技术中，采用唯一的、较长时长的定时器将会导致：连接状态的终端设备在触发随机接入过程时，如果没收到竞争解决消息(即未接收到C-RNTI调度的PDCCH)，则该终端设备需要等竞争解决定时器超时后才能开始下一次RACH尝试，这样会大大增加RACH接入的延时，降低RACH的效率。
基于上述问题，本发明提供一种随机接入方法，本申请实施例的随机接入方法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6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)，还可以是NR/5G系统中的基站(gNB)，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6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6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。
本发明实施例提供的随机接入方法的一种可选处理流程，如图7所示，包括以下步骤：
步骤S301，终端设备获取定时器的第一参数，所述定时器的第一参数的值小于定时器的第二参数的值；
本发明实施例中，所述定时器的第二参数即为现有技术中的定时器的参数，由终端设备通过系统消息获取。所述定时器的第一参数是新增的定时器参数。
在一些实施例中，终端设备可通过系统消息获取定时器的第一参数。在具体实施时，网络设备通过系统消息广播定时器的第一参数和定时器的第二参数，终端设备通过接收系统消息获取定时器的第一参数和定时器的第二参数；所述定时器的第一参数和所述定时器的第二参数均为表征定时器的时长的参数。
此时，终端设备获取到两个表征定时器时长的参数(定时器的第一参数和定时器的第二参数)，在下述中的任意一种情况下，终端设备使用定时器的第一参数：处于idle态或inactive态的终端设备基于系统信息(System Information，SI)请求(request)触发的随机接入、处于connected态的终端设备基于调度请求(Scheduling Request，SR)触发的随机接入、处于connected态的终端设备基于波束失败修复(beam failure recovery) 触发的随机接入、和处于connected态的终端设备基于PDCCH order触发的随机接入。当终端设备使用定时器的第一参数触发定时器时，终端设备忽略定时器的第二参数。
可选地，所述SI request为Msg3-based SI request；处于connected态的终端设备基于PDCCH order触发的竞争随机接入(Contention Based Random Access，CBRA)随机接入。
基于上述实施例，对TS38.331，RRC protocol specification进行如下修改：
Figure PCTCN2019085155-appb-000003
Figure PCTCN2019085155-appb-000004
Figure PCTCN2019085155-appb-000005
在另一些实施例中，终端设备通过系统消息获取定时器的第二参数，并通过系统消息、或RRC专用信令、或通过协议约定缩放因子，缩放因子的值小于1；终端设备计算定时器的第二参数与缩放因子的乘积，得到定时器的第一参数。
此时，终端设备获取到两个表征定时器时长的参数(定时器的第一参数和定时器的第二参数)，在下述中的任意一种情况下，终端设备使用定时器的第一参数：处于idle态或inactive态的终端设备基于SI request触发的随机接入、处于connected态的终端设备基于SR触发的随机接入、处于connected态的终端设备基于beam failure recovery触发的随机接入、和处于connected态的终端设备基于PDCCH order触发的随机接入。
可选地，所述SI request为Msg3-based SI request；处于connected态的终端设备基于PDCCH order触发的CBRA随机接入。
在又一些实施例中，终端设备可通过RRC专用信令获取定时器的第一参数。在具体实施时，网络设备通过系统消息广播定时器的第一参数，通过RRC专用信令发送定时器的第二参数；终端设备接收定时器的第一参数和定时器的第二参数；所述定时器的第一参数和所述定时器的第二参数均为表征定时器的时长的参数。可选地，所述RRC专用信令为RRC重配置消息。
此时，终端设备获取到两个表征定时器时长的参数(定时器的第一参数和定时器的第二参数)，在下述中的任意一种情况下，终端设备使用定时器的第一参数：处于connected态的终端设备基于SR触发的随机接入、处于connected态的终端设备基于beam failure recovery触发的随机接入、和处于connected态的终端设备基于PDCCH order触发的随机接入。当终端设备使用定时器的第一参数触发定时器时，终端设备利用定时器的第一参数覆盖定时器的第二参数。当终端设备离开connected态后，终端设备恢复使用定时器的第二参数，即终端设备利用定时器的第二参数触发定时器。
可选地，所述SI request为Msg3-based SI request；处于connected态的终端设备基于PDCCH order触发的CBRA随机接入。
基于上述实施例，对TS38.331，RRC protocol specification进行如下修改：
Figure PCTCN2019085155-appb-000006
Figure PCTCN2019085155-appb-000007
Figure PCTCN2019085155-appb-000008
还有一些实施例中，终端设备分别通过系统消息和RRC专用信令接收到两个定时器的第一参数时，connected态的终端设备利用通过RRC专用信令接收的定时器的第一参数触发定时器；终端设备离开连接态时，利用通过系统消息接收到的定时器的第一参数触发定时器。
步骤S302，终端设备基于所述定时器的第一参数，判断是否重新启动随机接入。
在具体实施时，所述终端设备基于所述定时器的第一参数启动定时器，在所述定时器的时长内监听竞争解决消息；在所述定时器的时长内未监听到竞争解决消息的情况下，所述终端设备判断重新启动随机接入。可选地，所述竞争解决消息为C-RNTI调度的PDCCH。
本发明上述各实施例中，在现有的定时器参数(定时器的第二参数)的基础上，新增一较短的定时器参数(定时器的第一参数)；针对随机接入过程中，Msg4不需要包含RRC消息的场景，终端设备能够使用较短的定时器参数来解决竞争冲突；在竞争失败的 情况下，能够快速地进行下一次RACH尝试，从而缩短了RACH接入的时延，提高RACH的效率。
需要说明的是，基于本发明实施例所述的随机接入方法，还可以在2步RACH中新增MsgB window的配置，在MsgB中不需要包括RRC消息时，终端设备使用网络设备配置的较短的MsgB window。此时，所述随机接入为下述中的任意一种：处于idle态或inactive态的终端设备基于SI request触发的2步随机接入、处于connected态的终端设备基于SR触发的2步随机接入、处于connected态的终端设备基于beam failure recovery触发的2步随机接入、和处于connected态的终端设备基于PDCCH order触发的2步随机接入。可选地，新增的MsgB window可由网络设备通过系统消息或RRC专用信令通知至终端设备。
为实现上述随机接入方法，本发明实施例还提供一种终端设备，所述终端设备的组成结构，如图8所示，终端设备400包括：
处理单元401，配置为获取定时器的第一参数；基于所述定时器的第一参数，判断是否重新启动随机接入，所述定时器的第一参数的值小于定时器的第二参数的值。
本发明实施例中，所述定时器的第一参数和所述定时器的第二参数通过系统信息获取。所述处理单元401，还配置为忽略所述定时器的第二参数。
本发明实施例中，所述定时器的第一参数的值为所述定时器的第二参数的值与缩放因子的乘积。
其中，所述缩放因子通过系统信息获取；
或者，所述缩放因子通过RRC专用信令获取；
或者，所述缩放因子为协议约定的固定值。
在所述定时器的第一参数和所述定时器的第二参数通过系统信息获取时，或者所述定时器的第一参数的值为所述定时器的第二参数的值与缩放因子的乘积时，所述随机接入包括下述中的任意一种：
处于空闲态或非激活态的终端设备基于系统信息请求触发的随机接入；
处于连接态的终端设备基于调度请求触发的随机接入；
处于连接态的终端设备基于波束失败修复触发的随机接入；
处于连接态的终端设备基于PDCCH order触发的随机接入。
本发明实施例中，所述定时器的第二参数通过系统信息获取，所述定时器的第一参数通过RRC专用信令获取。所述处理单元401，还配置为利用所述定时器的第一参数覆 盖所述定时器的第二参数。此时，所述随机接入包括下述中的任意一种：
处于连接态的终端设备基于调度请求触发的随机接入；
处于连接态的终端设备基于波束失败修复触发的随机接入；
处于连接态的终端设备基于PDCCH order触发的随机接入。
在所述定时器的第一参数通过RRC专用信令获取时，所述随机接入包括下述中的任意一种：
处于连接态的终端设备基于调度请求触发的随机接入；
处于连接态的终端设备基于波束失败修复触发的随机接入；
处于连接态的终端设备基于PDCCH order触发的随机接入。
可选地，在所述终端设备离开连接态的情况下，所述处理单元，还配置为基于所述定时器的第二参数，判断是否重新启动随机接入。
本发明实施例中，所述处理单元401，配置为基于所述定时器的第一参数启动定时器，在所述定时器的时长内监听竞争解决消息；
在所述定时器的时长内未监听到竞争解决消息的情况下，判断重新启动随机接入。
本发明实施例中，所述随机接入为基于竞争的4步随机接入。
为实现上述随机接入方法，本发明实施例还提供一种网络设备，所述网络设备的组成结构，如图9所示，网络设备500包括：
发送单元501，配置为发送第一参数，所述第一参数用于终端设备确定定时器的第一参数，所述定时器的第一参数的值小于定时器的第二参数的值，所述定时器的第一参数用于所述终端设备判断是否重新启动随机接入。
本发明实施例中，所述定时器的第二参数和所述第一参数通过系统信息发送。
本发明实施例中，所述第一参数为所述定时器的第一参数或缩放因子。在所述第一参数为所述缩放因子的情况下，所述定时器的第一参数的值为所述定时器的第二参数的值与缩放因子的乘积。所述随机接入包括下述中的任意一种：
处于空闲态或非激活态的终端设备基于系统信息请求触发的随机接入；
处于连接态的终端设备基于调度请求触发的随机接入；
处于连接态的终端设备基于波束失败修复触发的随机接入；
处于连接态的终端设备基于PDCCH order触发的随机接入。
本发明实施例中，所述第一参数为通过RRC专用信令发送的定时器的第一参数。其中，所述随机接入包括下述中的任意一种：处于连接态的终端设备基于调度请求触发 的随机接入；处于连接态的终端设备基于波束失败修复触发的随机接入；和处于连接态的终端设备基于PDCCH order触发的随机接入。
本发明实施例中，在所述终端设备离开连接态的情况下，所述定时器的第二参数用于所述终端设备判断是否重新启动随机接入。
本发明实施例中，所述随机接入为基于竞争的4步随机接入。
本发明实施例还提供一种终端设备，包括处理器和用于存储能够在处理器上运行的计算机程序的存储器，其中，所述处理器用于运行所述计算机程序时，执行上述终端设备执行的随机接入方法的步骤。
本发明实施例还提供一种网络设备，包括处理器和用于存储能够在处理器上运行的计算机程序的存储器，其中，所述处理器用于运行所述计算机程序时，执行上述网络设备执行的随机接入方法的步骤。
图10是本发明实施例的电子设备(终端设备和网络设备)的硬件组成结构示意图，电子设备700包括：至少一个处理器701、存储器702和至少一个网络接口704。电子设备700中的各个组件通过总线系统705耦合在一起。可理解，总线系统705用于实现这些组件之间的连接通信。总线系统705除包括数据总线之外，还包括电源总线、控制总线和状态信号总线。但是为了清楚说明起见，在图10中将各种总线都标为总线系统705。
可以理解，存储器702可以是易失性存储器或非易失性存储器，也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ROM、可编程只读存储器(PROM，Programmable Read-Only Memory)、可擦除可编程只读存储器(EPROM，Erasable Programmable Read-Only Memory)、电可擦除可编程只读存储器(EEPROM，Electrically Erasable Programmable Read-Only Memory)、磁性随机存取存储器(FRAM，ferromagnetic random access memory)、快闪存储器(Flash Memory)、磁表面存储器、光盘、或只读光盘(CD-ROM，Compact Disc Read-Only Memory)；磁表面存储器可以是磁盘存储器或磁带存储器。易失性存储器可以是随机存取存储器(RAM，Random Access Memory)，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(SRAM，Static Random Access Memory)、同步静态随机存取存储器(SSRAM，Synchronous Static Random Access Memory)、动态随机存取存储器(DRAM，Dynamic Random Access Memory)、同步动态随机存取存储器(SDRAM，Synchronous Dynamic Random Access Memory)、双倍数据速率同步动态随机存取存储器 (DDRSDRAM，Double Data Rate Synchronous Dynamic Random Access Memory)、增强型同步动态随机存取存储器(ESDRAM，Enhanced Synchronous Dynamic Random Access Memory)、同步连接动态随机存取存储器(SLDRAM，SyncLink Dynamic Random Access Memory)、直接内存总线随机存取存储器(DRRAM，Direct Rambus Random Access Memory)。本发明实施例描述的存储器702旨在包括但不限于这些和任意其它适合类型的存储器。
本发明实施例中的存储器702用于存储各种类型的数据以支持电子设备700的操作。这些数据的示例包括：用于在电子设备700上操作的任何计算机程序，如应用程序7022。实现本发明实施例方法的程序可以包含在应用程序7022中。
上述本发明实施例揭示的方法可以应用于处理器701中，或者由处理器701实现。处理器701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，上述方法的各步骤可以通过处理器701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701可以是通用处理器、数字信号处理器(DSP，Digital Signal Processor)，或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等。处理器701可以实现或者执行本发明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任何常规的处理器等。结合本发明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。软件模块可以位于存储介质中，该存储介质位于存储器702，处理器701读取存储器702中的信息，结合其硬件完成前述方法的步骤。
在示例性实施例中，电子设备700可以被一个或多个应用专用集成电路(ASIC，Application Specific Integrated Circuit)、DSP、可编程逻辑器件(PLD，Programmable Logic Device)、复杂可编程逻辑器件(CPLD，Complex Programmable Logic Device)、FPGA、通用处理器、控制器、MCU、MPU、或其他电子元件实现，用于执行前述方法。
本申请实施例还提供了一种存储介质，用于存储计算机程序。
可选的，该存储介质可应用于本申请实施例中的终端设备，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的相应流程，为了简洁，在此不再赘述。
可选的，该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的相应流程，为了简洁，在此不再赘述。
本发明是参照根据本发明实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一 流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
以上所述，仅为本发明的较佳实施例而已，并非用于限定本发明的保护范围，凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本发明的保护范围之内。

Claims (46)

  1. 一种随机接入方法，所述方法包括：
    终端设备获取定时器的第一参数，所述定时器的第一参数的值小于定时器的第二参数的值；
    所述终端设备基于所述定时器的第一参数，判断是否重新启动随机接入。
  2. 根据权利要求1所述的方法，其中，所述定时器的第一参数和所述定时器的第二参数通过系统信息获取。
  3. 根据权利要求2所述的方法，其中，所述方法还包括：所述终端设备忽略所述定时器的第二参数。
  4. 根据权利要求1所述的方法，其中，所述定时器的第一参数的值为所述定时器的第二参数的值与缩放因子的乘积。
  5. 根据权利要求4所述的方法，其中，所述缩放因子通过系统信息获取；
    或者，所述缩放因子通过无线资源控制RRC专用信令获取；
    或者，所述缩放因子为协议约定的固定值。
  6. 根据权利要求2至5任一项所述的方法，其中，所述随机接入包括下述中的任意一种：
    处于空闲态或非激活态的终端设备基于系统信息请求触发的随机接入；
    处于连接态的终端设备基于调度请求触发的随机接入；
    处于连接态的终端设备基于波束失败修复触发的随机接入；
    处于连接态的终端设备基于物理下行控制信道命令PDCCH order触发的随机接入。
  7. 根据权利要求1所述的方法，其中，所述定时器的第二参数通过系统信息获取，所述定时器的第一参数通过RRC专用信令获取。
  8. 根据权利要求7所述的方法，其中，所述方法还包括：
    所述终端设备利用所述定时器的第一参数覆盖所述定时器的第二参数。
  9. 根据权利要求7或8所述的方法，其中，所述随机接入包括下述中的任意一种：
    处于连接态的终端设备基于调度请求触发的随机接入；
    处于连接态的终端设备基于波束失败修复触发的随机接入；
    处于连接态的终端设备基于PDCCH order触发的随机接入。
  10. 根据权利要求7至9任一项所述的方法，其中，在所述终端设备离开连接态的 情况下，所述方法还包括：
    所述终端设备基于所述定时器的第二参数，判断是否重新启动随机接入。
  11. 根据权利要求1至10任一项所述的方法，其中，所述终端设备基于所述第一定时器参数，判断是否重新启动随机接入，包括：
    所述终端设备基于所述定时器的第一参数启动定时器，在所述定时器的时长内监听竞争解决消息；
    在所述定时器的时长内未监听到竞争解决消息的情况下，所述终端设备判断重新启动随机接入。
  12. 根据权利要求1至11任一项所述的方法，其中，所述随机接入为基于竞争的4步随机接入。
  13. 一种随机接入方法，所述方法包括：
    网络设备发送第一参数，所述第一参数用于终端设备确定定时器的第一参数，所述定时器的第一参数的值小于定时器的第二参数的值，所述定时器的第一参数用于所述终端设备判断是否重新启动随机接入。
  14. 根据权利要求13所述的方法，其中，所述定时器的第二参数和所述第一参数通过系统信息发送。
  15. 根据权利要求13或14所述的方法，其中，所述第一参数为所述定时器的第一参数或缩放因子。
  16. 根据权利要求15所述的方法，其中，在所述第一参数为所述缩放因子的情况下，所述定时器的第一参数的值为所述定时器的第二参数的值与缩放因子的乘积。
  17. 根据权利要求14至16任一项所述的方法，其中，所述随机接入包括下述中的任意一种：
    处于空闲态或非激活态的终端设备基于系统信息请求触发的随机接入；
    处于连接态的终端设备基于调度请求触发的随机接入；
    处于连接态的终端设备基于波束失败修复触发的随机接入；
    处于连接态的终端设备基于物理下行控制信道命令PDCCH order触发的随机接入。
  18. 根据权利要求13所述的方法，其中，所述第一参数为通过RRC专用信令发送的定时器的第一参数。
  19. 根据权利要求18所述的方法，其中，所述随机接入包括下述中的任意一种：
    处于连接态的终端设备基于调度请求触发的随机接入；
    处于连接态的终端设备基于波束失败修复触发的随机接入；
    处于连接态的终端设备基于PDCCH order触发的随机接入。
  20. 根据权利要求18或19所述的方法，其中，在所述终端设备离开连接态的情况下，所述定时器的第二参数用于所述终端设备判断是否重新启动随机接入。
  21. 根据权利要求13至20任一项所述的方法，其中，所述随机接入为基于竞争的4步随机接入。
  22. 一种终端设备，所述终端设备包括：
    处理单元，配置为获取定时器的第一参数；基于所述定时器的第一参数，判断是否重新启动随机接入，所述定时器的第一参数的值小于定时器的第二参数的值。
  23. 根据权利要求22所述的终端设备，其中，所述定时器的第一参数和所述定时器的第二参数通过系统信息获取。
  24. 根据权利要求23所述的终端设备，其中，所述处理单元，还配置为忽略所述定时器的第二参数。
  25. 根据权利要求22所述的终端设备，其中，所述定时器的第一参数的值为所述定时器的第二参数的值与缩放因子的乘积。
  26. 根据权利要求25所述的终端设备，其中，所述缩放因子通过系统信息获取；
    或者，所述缩放因子通过无线资源控制RRC专用信令获取；
    或者，所述缩放因子为协议约定的固定值。
  27. 根据权利要求23至26任一项所述的终端设备，其中，所述随机接入包括下述中的任意一种：
    处于空闲态或非激活态的终端设备基于系统信息请求触发的随机接入；
    处于连接态的终端设备基于调度请求触发的随机接入；
    处于连接态的终端设备基于波束失败修复触发的随机接入；
    处于连接态的终端设备基于物理下行控制信道命令PDCCH order触发的随机接入。
  28. 根据权利要求22所述的终端设备，其中，所述定时器的第二参数通过系统信息获取，所述定时器的第一参数通过RRC专用信令获取。
  29. 根据权利要求28所述的终端设备，其中，所述处理器，还配置为利用所述定时器的第一参数覆盖所述定时器的第二参数。
  30. 根据权利要求28或29所述的终端设备，其中，所述随机接入包括下述中的任意一种：
    处于连接态的终端设备基于调度请求触发的随机接入；
    处于连接态的终端设备基于波束失败修复触发的随机接入；
    处于连接态的终端设备基于PDCCH order触发的随机接入。
  31. 根据权利要求28至30任一项所述的终端设备，其中，在所述终端设备离开连接态的情况下，所述处理单元，还配置为基于所述定时器的第二参数，判断是否重新启动随机接入。
  32. 根据权利要求22至31任一项所述的终端设备，其中，所述处理单元，配置为基于所述定时器的第一参数启动定时器，在所述定时器的时长内监听竞争解决消息；
    在所述定时器的时长内未监听到竞争解决消息的情况下，判断重新启动随机接入。
  33. 根据权利要求22至32任一项所述的终端设备，其中，所述随机接入为基于竞争的4步随机接入。
  34. 一种网络设备，所述网络设备包括：
    发送单元，配置为发送第一参数，所述第一参数用于终端设备确定定时器的第一参数，所述定时器的第一参数的值小于定时器的第二参数的值，所述定时器的第一参数用于所述终端设备判断是否重新启动随机接入。
  35. 根据权利要求34所述的网络设备，其中，所述定时器的第二参数和所述第一参数通过系统信息发送。
  36. 根据权利要求34或35所述的网络设备，其中，所述第一参数为所述定时器的第一参数或缩放因子。
  37. 根据权利要求36所述的网络设备，其中，在所述第一参数为所述缩放因子的情况下，所述定时器的第一参数的值为所述定时器的第二参数的值与缩放因子的乘积。
  38. 根据权利要求35至37任一项所述的网络设备，其中，所述随机接入包括下述中的任意一种：
    处于空闲态或非激活态的终端设备基于系统信息请求触发的随机接入；
    处于连接态的终端设备基于调度请求触发的随机接入；
    处于连接态的终端设备基于波束失败修复触发的随机接入；
    处于连接态的终端设备基于物理下行控制信道命令PDCCH order触发的随机接入。
  39. 根据权利要求34所述的网络设备，其中，所述第一参数为通过RRC专用信令发送的定时器的第一参数。
  40. 根据权利要求39所述的网络设备，其中，所述随机接入包括下述中的任意一 种：
    处于连接态的终端设备基于调度请求触发的随机接入；
    处于连接态的终端设备基于波束失败修复触发的随机接入；
    处于连接态的终端设备基于PDCCH order触发的随机接入。
  41. 根据权利要求39或40所述的网络设备，其中，在所述终端设备离开连接态的情况下，所述定时器的第二参数用于所述终端设备判断是否重新启动随机接入。
  42. 根据权利要求34至41任一项所述的网络设备，其中，所述随机接入为基于竞争的4步随机接入。
  43. 一种终端设备，包括处理器和用于存储能够在处理器上运行的计算机程序的存储器，其中，
    所述处理器用于运行所述计算机程序时，执行权利要求1至12任一项所述的随机接入方法的步骤。
  44. 一种网络设备，包括处理器和用于存储能够在处理器上运行的计算机程序的存储器，其中，
    所述处理器用于运行所述计算机程序时，执行权利要求13至21任一项所述的随机接入方法的步骤。
  45. 一种存储介质，存储有可执行程序，所述可执行程序被处理器执行时，实现权利要求1至12任一项所述的随机接入方法。
  46. 一种存储介质，存储有可执行程序，所述可执行程序被处理器执行时，实现权利要求13至21任一项所述的随机接入方法。
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