WO2021068172A1 - 一种随机接入方法、电子设备及存储介质 - Google Patents

一种随机接入方法、电子设备及存储介质 Download PDF

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Publication number
WO2021068172A1
WO2021068172A1 PCT/CN2019/110463 CN2019110463W WO2021068172A1 WO 2021068172 A1 WO2021068172 A1 WO 2021068172A1 CN 2019110463 W CN2019110463 W CN 2019110463W WO 2021068172 A1 WO2021068172 A1 WO 2021068172A1
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Prior art keywords
terminal device
identification information
rar
random access
subheader
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PCT/CN2019/110463
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English (en)
French (fr)
Inventor
石聪
王淑坤
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Oppo广东移动通信有限公司
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Application filed by Oppo广东移动通信有限公司 filed Critical Oppo广东移动通信有限公司
Priority to CN201980099354.7A priority Critical patent/CN114223308A/zh
Priority to PCT/CN2019/110463 priority patent/WO2021068172A1/zh
Publication of WO2021068172A1 publication Critical patent/WO2021068172A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA

Definitions

  • This application relates to the field of wireless communication technology, and in particular to a random access method, electronic equipment, and storage medium.
  • RAR Random Access CHannel Response
  • embodiments of the present application provide a random access method, electronic device and storage medium, which can be.
  • an embodiment of the present application provides a random access method, including: a terminal device determines whether the RAR message is a RAR message for the terminal device according to identification information carried in a received RAR message. .
  • embodiments of the present application provide a random access method, including: a network device sends a RAR message to a terminal device, the RAR message carries identification information, and the identification information is used by the terminal device to determine the RAR Whether the message is a RAR message for the terminal device.
  • an embodiment of the present application provides a terminal device, the terminal device includes: a processing unit configured to determine whether the RAR message is an RAR for the terminal device according to the identification information carried in the received RAR message news.
  • an embodiment of the present application provides a network device, the network device includes: a sending unit configured to send a RAR message to a terminal device, the RAR message carries identification information, and the identification information is used for the terminal The device determines whether the RAR message is a RAR message for the terminal device.
  • an embodiment of the present application 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 application 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-mentioned network when the computer program is running. The steps of the random access method performed by the device.
  • an embodiment of the present application provides a computer storage medium that stores an executable program, and when the executable program is executed by a processor, the above-mentioned random access method executed by the terminal device is implemented.
  • an embodiment of the present application provides a computer storage medium that stores 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.
  • an embodiment of the present application provides a chip, including: a processor, configured to call and run a computer program from a memory, so that a device installed with the chip executes the random access method performed by the terminal device, or the above Random access method implemented by network equipment.
  • an embodiment of the present application provides a computer program product, including computer program instructions that cause a computer to execute the random access method executed by the above-mentioned terminal device or the random access method executed by the above-mentioned network device.
  • an embodiment of the present application provides a computer program that enables a computer to execute the random access method executed by the aforementioned terminal device or the random access method executed by the aforementioned network device.
  • the random access method provided by the embodiment of the present application includes: the terminal device determines whether the RAR message is a RAR message for the terminal device according to the identification information carried in the received RAR message.
  • the network device carries the identification information in the RAR message, so that the terminal device can determine whether the RAR message is an RAR message for itself according to the identification information, and avoids the terminal device from transmitting Msg3 according to the instructions in the RAR message that is not for itself. , Thereby reducing the conflict of random access.
  • Figure 1 is a schematic diagram of a competitive random access process in an application
  • FIG. 2 is a schematic diagram of the format of the RAR of the application
  • Figure 3 is a schematic diagram of the format of the subheader of the application.
  • Figure 4 is a schematic diagram of the structure of the MAC PDU of the application.
  • FIG. 5 is a schematic diagram of the RACH conflict of the application.
  • FIG. 6 is a schematic diagram of the composition structure of a communication system according to an embodiment of the application.
  • FIG. 7 is a schematic diagram of an optional processing flow of a random access method according to an embodiment of this application.
  • FIG. 8 is a schematic diagram of the identification information carried in the MAC RAR according to an embodiment of the application.
  • FIG. 9 is a schematic diagram of a radio frame with a maximum RAR time window of 20 ms and an RAR time window according to an embodiment of the application;
  • FIG. 10 is a schematic diagram of the identification information carried in the BI subheader according to an embodiment of the application.
  • FIG. 11 is a schematic diagram of the composition structure of a terminal device according to an embodiment of the application.
  • FIG. 12 is a schematic diagram of the composition structure of a network device according to an embodiment of the application.
  • FIG. 13 is a schematic diagram of the hardware composition structure of an electronic device according to an embodiment of the application.
  • 5G Enhance Mobile Broadband
  • URLLC Ultra Reliable Low Latency Communications
  • mMTC Massive Machine Type Communication
  • eMBB still aims for users to obtain multimedia content, services and data, and its demand is growing very rapidly.
  • eMBB may be deployed in different scenarios, such as indoors, urban areas, rural areas, etc., its capabilities and requirements are also quite different, so it cannot be generalized, and must be analyzed in detail in conjunction with specific deployment scenarios.
  • Typical applications of URLLC include: industrial automation, power automation, telemedicine operations (surgery), traffic safety protection, etc.
  • the typical characteristics of mMTC include: high connection density, small data volume, delay-insensitive services, low cost and long service life of the module.
  • LTE Long Term Evolution
  • NR island coverage mode In the early deployment of New Radio (NR), complete NR network coverage is difficult to obtain, so the typical network coverage mode is wide-area Long Term Evolution (LTE) coverage and NR island coverage mode. Moreover, the spectrum used for LTE is mostly deployed below 6GHz, and there is very little spectrum below 6GHz that can be used for NR. Therefore, NR must study the spectrum application above 6GHz; however, the coverage of the high frequency band is limited and the signal fading is fast; at the same time, in order to protect the early investment of mobile operators in LTE, a tight interworking between LTE and NR is proposed. mode. Of course, NR can also be deployed independently.
  • LTE Long Term Evolution
  • NR island coverage mode In the early deployment of New Radio (NR), complete NR network coverage is difficult to obtain, so the typical network coverage mode is wide-area Long Term Evolution (LTE) coverage and NR island coverage mode. Moreover, the spectrum used for LTE is mostly deployed below 6GHz, and there is very little spectrum below
  • NR can also work in unlicensed frequency bands in the following working scenarios:
  • Carrier aggregation scenario the primary cell (Primary Cell, PCell) is a licensed spectrum, and the secondary cells (SCell) working on the unlicensed spectrum are aggregated by means of carrier aggregation.
  • PCell Primary Cell
  • SCell secondary cells
  • PCell is LTE licensed spectrum
  • PScell is NR unlicensed spectrum
  • NR works as an independent cell in the unlicensed spectrum.
  • NR-U NR-Unlicensed
  • 6GHz unlicensed spectrum such as: US5925-7125MHz, Europe 5925-6425MHz, or other frequency bands; in unlicensed
  • the design of NR-U should ensure fairness with other systems that are already working on these unlicensed spectrums, for example, fairness with WiFi.
  • the principle of fairness is that the impact of NR-U on systems that have been deployed on unlicensed spectrum (for example, WiFi) cannot exceed the impact between systems that have been deployed on unlicensed spectrum.
  • the general energy detection mechanism is the Listen Before Talk (LBT) mechanism.
  • LBT Listen Before Talk
  • the basic principle of the LBT mechanism is that before network equipment or terminal equipment (and transmission end equipment) transmits data on the unlicensed spectrum, it needs to be in accordance with the regulations. Listen for a while. If the listening result indicates that the channel is in an idle state, the transmitting end device can transmit data to the receiving end. If the listening result indicates that the channel is in an occupied state, the transmitting end device needs to back off for a period of time according to regulations before continuing to listen to the channel, knowing that the channel listening result is in an idle state, before transmitting data to the receiving end device.
  • LAA licensed spectrum assisted access
  • m p is related to the listening channel time for performing channel access.
  • CW min, p and CW max, p are related to the random listening channel time in the channel access process. Specifically, when the network device listens to the channel for Td time and is idle, it needs to listen to the channel again N times, and the duration of each listening is 9 us. Where N is a random number from 0 to CWp, and CW min,p ⁇ CW p ⁇ CW max,p .
  • T mcot,p is the longest time that the network device occupies the channel after it seizes the channel. It is related to the channel priority adopted by the network device. For example, if the priority is 1, after the channel is successfully listened to, the channel will be occupied for at most 2ms.
  • MCOT Maximum Channel Occupy Time
  • Random access is an important process for a terminal device to establish a wireless connection with a network device. Through random access, the terminal device can obtain uplink synchronization with the network device and apply for uplink resources. The random access process is divided into competitive random access and non-competitive random access.
  • Step 1 The terminal device sends a random access preamble to the network device.
  • the terminal device determines the relationship between the synchronization signal block (Synchronization Signal Block, SSB) and the physical random access channel (Physical Random Access CHannel, PRACH) resource through high-level configuration; receives a set of SSB and determines its reference signal received power (Reference signal). Signal Receiving Power (RSRP) value, select the appropriate SSB according to the threshold; determine the PRACH resource based on the selected SSB and the corresponding relationship between the SSB and the PRACH resource; select the preamble group according to the size of Msg3;
  • RSRP Signal Receiving Power
  • Step 2 The network device sends a RAR message to the terminal device.
  • the network device sends the RAR message corresponding to the RA-RNTI to the terminal device through Msg2.
  • the terminal device starts the RAR time window (RACH-Response Window) at the first physical downlink control channel (Physical Downlink Control Channel, PDCCH) after sending the Preamble and monitors the PDCCH during the operation of the time window to receive the corresponding RAR message of RA-RNTI. If the terminal device does not receive the RAR message within the RAR monitoring window, the terminal device performs msg1 retransmission; if the terminal device receives the RAR message within the RAR monitoring window, the terminal device transmits Msg3 according to the instructions of the RAR message.
  • RACH-Response Window the first physical downlink control channel (Physical Downlink Control Channel, PDCCH) after sending the Preamble and monitors the PDCCH during the operation of the time window to receive the corresponding RAR message of RA-RNTI. If the terminal device does not receive the RAR message within the RAR monitoring window, the terminal device performs msg1 retransmission; if the terminal device receives the R
  • Step 3 The terminal device transmits Msg3 based on the uplink authorization in the RAR message.
  • the terminal device After Msg3 is transmitted, the terminal device starts the random access contention resolution timer (ra-ContentionResolutionTimer) and monitors the PDCCH during the running of the timer; when Msg3 performs Hybrid Automatic Repeat reQuest (HARQ) retransmission, Restart the timer; before the timer expires or stops, the terminal device will always monitor the PDCCH.
  • ra-ContentionResolutionTimer Random access contention resolution timer
  • HARQ Hybrid Automatic Repeat reQuest
  • the terminal device receives the DCI format 1_0 of the C-RNTI scrambling code and its corresponding PDSCH, random access is completed. Or, if the terminal device receives the DCI format 1_0 of the TC-RNTI scrambling code and its corresponding PDSCH, and compares the content successfully, the random access is completed.
  • RAR format diagram includes subheader (subheader), RAPID, payload, uplink (UpLink, UL) authorization (grant) and Temporary C-RNTI; among them, the format diagram of subheader, as shown in Figure 3. , Where BI is used to indicate the backoff time of retransmitting Msg1.
  • MAC PDU Media Access Control Protocol Data Unit
  • one RAP ID corresponds to one MAC RAR.
  • NR-U when a terminal device initiates a random access process, whether it is a competitive random access or a non-competitive random access, there will be unsuccessful channel preemption by the terminal device, resulting in the network device not being able to send Msg2 (that is, RAR) within 10ms. Response message). Therefore, in NR-U, the size of the RAR time window needs to be further expanded so that the RAR time window is greater than 10 ms.
  • the network device may cause the network device to calculate the same RA based on the random access opportunity (RACH Occation, RO) resource selected by two different terminal devices in at least two 10ms system frames -RNTI.
  • RACH Occation, RO random access opportunity
  • the terminal device cannot determine whether the RAR message is a RAR message for itself; this further increases the RACH conflict.
  • a schematic diagram of RACH conflict as shown in FIG. 5, the first terminal device sends the Preamble in the first time slot of the first radio frame, and the RAR time window opened by the first terminal device is from the first time slot of the first radio frame.
  • the second terminal device sends the Preamble in the first time slot of the second radio frame, and the second terminal device opens the RAR time window from the third time slot of the second radio frame 20ms after the start time.
  • the RA-RNTI determined according to the PRACH resource of the Preamble sent by the first terminal device may be the same as the RA-RNTI determined according to the PRACH resource of the Preamble sent by the second terminal device;
  • a terminal device and a second terminal device may receive RAR messages carrying the same RA-RNTI.
  • the first terminal device and the second terminal device cannot determine whether the RAR message is a RAR message for themselves.
  • any terminal device performs Msg3 transmission according to the indication of the RAR message that is not directed to itself, it will cause the conflict of random access to further increase.
  • This application provides a random access method.
  • the random access method in the embodiments of this application can be applied to various communication systems, for example: Global System of Mobile Communication (GSM) system, Code Division Multiple Access (Code Division) Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), 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 system LTE Frequency Division Duplex (FDD) ) System
  • LTE Time Division Duplex (TDD) LTE 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. 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), 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 Line (DSL), digital cable, and direct cable connection ; 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
  • WLAN wireless local area networks
  • IoT Internet of Things
  • 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, satellite 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 telephone 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 NR system or NR network.
  • 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 having a communication function 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 network controllers, mobility management entities, and other network entities, which are not limited in the embodiment of the present application.
  • An optional processing procedure of the random access method provided by the embodiment of the present application, as shown in FIG. 7, includes the following steps:
  • Step S201 The terminal device receives the RAR message sent by the network device.
  • Step S202 The terminal device determines whether the RAR message is a RAR message for the terminal device according to the identification information carried in the RAR message.
  • the identification information is a radio frame ID (frame id).
  • the terminal device determines whether the RAR message is an RAR message for the terminal device according to the identification information carried in the received RAR message, the system frame number (System Frame Number) of the preamble transmitted by the terminal device is Frame Number, SFN) A value obtained by modulo the number of system frames included in the RAR time window, and if it matches the value corresponding to the identification information, the terminal device determines that the RAR message is for the terminal device RAR message; in the case where the system frame number of the terminal device transmitting the preamble modulo the number of system frames included in the RAR time window does not match the value corresponding to the identification information, the terminal device determines The RAR message is not a RAR message for the terminal device.
  • the system frame number (System Frame Number) of the preamble transmitted by the terminal device is Frame Number, SFN) A value obtained by modulo the number of system frames included in the RAR time window, and if it matches the value corresponding to the identification information, the terminal device determines that the RAR message is for the terminal device RAR message
  • matching can also be understood as equal, that is, the value obtained by modulo the system frame number of the preamble transmitted by the terminal device to the number of system frames included in the RAR time window, and the value corresponding to the identification information is equal
  • the terminal device determines that the RAR message is an RAR message for the terminal device; the system frame number of the preamble transmitted on the terminal device is a value obtained by modulo the number of system frames included in the RAR time window, and In a case where the values corresponding to the identification information are not equal, the terminal device determines that the RAR message is not a RAR message for the terminal device.
  • the value corresponding to the identification information may be the value after the value of the bit characterizing the identification information is converted into a decimal; for example, if the value of the bit characterizing the identification information is 00, then the identification information The value corresponding to the information is 0; the value of the bit characterizing the identification information is 01, then the value corresponding to the identification information is 1; the bit value of the identification information is 10, then the value corresponding to the identification information The value is 2; the bit value of the identification information is 11, and the value corresponding to the identification information is 3.
  • the system frame number of the terminal device transmitting the preamble is 5; the RAR time window is 40ms, then the number of system frames included in the RAR time window is 4; the system frame number of the terminal device transmitting the preamble is relative to the RAR time window.
  • the value obtained by modulo the number of system frames is 1. If the value of the bit characterizing the identification information is 1, or the value of the bit characterizing the identification information is 10, the value corresponding to the identification information is 1. In this scenario, the value obtained by modulo the number of system frames contained in the RAR time window from the system frame number of the terminal device transmitting the preamble is equal to the value corresponding to the identification information, and the terminal device determines that the RAR message is for The RAR message of the terminal device.
  • the value corresponding to the identification information is 0.
  • the system frame number of the terminal device transmitting the preamble modulo the number of system frames included in the RAR time window is not equal to the value corresponding to the identification information, and the terminal device determines that the RAR message is not RAR message for the terminal device.
  • the identification information is carried in the MAC RAR; since the MAC RAR is included in the MAC subPDU, it can also be understood that the identification information is carried in the MAC subPDU.
  • the identification information is carried in the MAC RAR.
  • the identification information is characterized by the value of the reserved bit (R bit) in the MAC RAR. For example, when the value of the R bit is 0, the identification information is 0; when the value of the R bit is 1, the identification information is 1. Since there is only one R bit in the MAC RAR, the situation in which the identification information shown is carried in the MAC RAR is suitable for scenarios where the RAR time window is at most 20 ms.
  • the terminal device Since one RAR message includes multiple MAC RARs, the terminal device first searches the MAC RAR for the MAC RAR corresponding to the preamble index of the preamble transmitted by the terminal device; the terminal device traverses the searched MAC RAR; the value obtained by modulo the number of system frames contained in the RAR time window until the system frame number of the preamble transmitted by the terminal device matches the value corresponding to the identification information carried in the MAC RAR; or, the terminal device
  • the system frame number of the transmission preamble is the value obtained by modulo the number of system frames contained in the RAR time window. If it does not match the value corresponding to the identification information carried in the MAC RAR, it will traverse all the MAC RARs found.
  • the MAC RAR corresponding to the preamble index transmitted by the terminal device may be a MAC RAR that includes a random access preamble identifier (Random Access Pramble Identifier, RAP ID) equal to the index of the preamble transmitted by the terminal device; Therefore, the RAP ID included in the MAC RAR obtained by the terminal device is equal to the index of the preamble transmitted by the terminal device.
  • RAP ID Random Access Pramble Identifier
  • the terminal device searches for the identification information carried in the first MAC RAR included in the RAR, and takes the value obtained by modulo the system frame number of the preamble transmitted by the terminal device to the number of system frames included in the RAR time window, and compares it with the value obtained in the first MAC RAR The value corresponding to the carried identification information is compared; if the comparison result is a mismatch, the terminal searches for the identification information carried in the second MAC RAR included in the RAR message, and compares the system frame number of the terminal device transmitting the preamble to the system included in the RAR time window The value obtained by modulo the number of frames is compared with the value corresponding to the identification information carried in the second MAC RAR; if the comparison result is a match, the terminal device determines that the RAR message is a RAR message for itself; if the comparison result is If there is no match, the terminal device continues to search for the identification information carried in the MAC RAR other than the first MAC RAR and the second MAC RAR included in
  • the identification information is carried in a backoff indicator (Backoff Indicator, BI) subheader (subheader).
  • the identification information is carried in the BI subheader.
  • the identification information is characterized by the value of the reserved bit (R bit) in the BI subheader. For example, when the value of the R bit is 00, the identification information is 0; when the value of the R bit is 01, the identification information is 1; when the value of the R bit is 10, the identification information is 2; When the value of the R bit is 11, the identification information is 3. Since there are two R bits in the BI subheader, the situation in which the identification information shown is carried in the MAC RAR is suitable for scenarios where the RAR time window is at most 40 ms.
  • the terminal device can determine whether the RAR message is a RAR message for itself. When the terminal device determines that the RAR message is a RAR message for itself, the terminal device further decodes the BI subheader correspondence The MAC subPDU. If the terminal device determines that the RAR message is not a RAR message for itself, the terminal device does not decode the MAC subPDU corresponding to the BI subheader.
  • the identification information is carried in a first subheader, and the first subheader is different from the BI subheader.
  • the first subheader is a new subheader that is different from the existing subheader; in addition to including some fields in the existing subheader, such as E/T/RAPID, the first subheader also adds at least one bit.
  • the value of at least one bit in the first subheader represents identification information. Since the number of bits characterizing the identification information in the first subheader is at least one, as the number of bits characterizing the identification information increases, it can be applied to a larger RAR time window.
  • the terminal device can determine whether the RAR message is a RAR message for itself. When the terminal device determines that the RAR message is a RAR message for itself, the terminal device further decodes the first subheader. MAC subPDU corresponding to the subheader. If the terminal device determines that the RAR message is not a RAR message for itself, the terminal device does not decode the MAC subPDU corresponding to the first subheader.
  • the identification information is carried in the RAR message, so that the terminal device can determine whether the RAR message is an RAR message for itself according to the identification information, so as to prevent the terminal device from performing Msg3 according to the instructions in the RAR message that is not for itself. Transmission, thereby reducing random access conflicts.
  • the size of the sequence number of the above-mentioned processes does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic, and should not correspond to the embodiments of the present application.
  • the implementation process constitutes any limitation.
  • composition structure of the terminal device 300 includes:
  • the processing unit 301 is configured to determine whether the RAR message is a RAR message for the terminal device according to the identification information carried in the received RAR message.
  • the identification information is a radio frame identification.
  • the identification information is carried in MAC RAR.
  • the identification information is characterized by the value of reserved bits in the MAC RAR.
  • the identification information is carried in the BI subheader.
  • the identification information is characterized by the value of reserved bits in the BI subheader.
  • the identification information is carried in a first subheader, and the first subheader is different from the BI subheader.
  • the identification information is characterized by the value of at least one bit in the first subheader.
  • the processing unit 301 is configured to take a value obtained by modulo the number of system frames contained in the RAR time window from the system frame number of the preamble transmitted by the terminal device, and match the value corresponding to the identification information In the case of determining that the RAR message is a RAR message for the terminal device;
  • the system frame number of the preamble transmitted by the terminal device is a value obtained by modulo the number of system frames included in the RAR time window, and if the value corresponding to the identification information does not match, it is determined that the RAR message is not for The RAR message of the terminal device.
  • the processing unit 301 is configured to search for the preamble transmitted with the terminal device in the MAC RAR included in the RAR message when the identification information is carried in the MAC RAR The MAC RAR corresponding to the index of the code;
  • the composition structure of the network device 400 includes:
  • the sending unit 401 is configured to send a RAR message to a terminal device, where the RAR message carries identification information, and the identification information is used by the terminal device to determine whether the RAR message is an RAR message for the terminal device.
  • the identification information is a radio frame identification.
  • the identification information is carried in MAC RAR.
  • the identification information is characterized by the value of reserved bits in the MAC RAR.
  • the identification information is carried in the BI subheader.
  • the identification information is characterized by the value of reserved bits in the BI subheader.
  • the identification information is carried in a first subheader, and the first subheader is different from the BI subheader.
  • the identification information is characterized by the value of at least one bit in the first subheader.
  • An embodiment of the present application also 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 device when the computer program is running. Steps of random access method.
  • An embodiment of the present application 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.
  • FIG. 13 is a schematic diagram of the hardware composition structure of an electronic device (terminal device and network device) according to an embodiment of the present application.
  • 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.
  • 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.
  • various buses are marked as the bus system 705 in FIG. 13.
  • 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 can 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 a 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
  • Synchronous Static Random Access Memory 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 Synchronous Dynamic Random Access Memory
  • SLDRAM synchronous connection dynamic random access memory
  • DRRAM Direct Rambus Random Access Memory
  • the memory 702 described in the embodiment of the present application 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 application 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. A program that implements the method of the embodiment of the present application may be included in the application program 7022.
  • the method disclosed in the foregoing embodiments of the present application 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 capability. In the implementation process, the steps of the foregoing method can be completed by an integrated logic circuit of hardware 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, and the like.
  • the processor 701 may implement or execute the methods, steps, and logical block diagrams disclosed in the embodiments of the present application.
  • the general-purpose processor may be a microprocessor or any conventional processor or the like.
  • the steps of the method disclosed in the embodiments of the present application can 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 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 Complex Programmable Logic Device
  • controller MCU
  • MPU or other electronic components to implement the foregoing method.
  • the embodiments of the present application also provide a computer storage medium for storing executable programs.
  • the computer storage medium can be applied to the terminal device in the embodiment of the present application, and the executable program enables the computer to execute the corresponding process in each method of the embodiment of the present application.
  • the executable program enables the computer to execute the corresponding process in each method of the embodiment of the present application.
  • the computer storage medium can be applied to the network device in the embodiment of the present application, and the executable program causes the computer to execute the corresponding process in each method of the embodiment of the present application.
  • the executable program causes the computer to execute the corresponding process in each method of the embodiment of the present application.
  • the embodiment of the present application provides a chip, including: a processor, configured to call and run a computer program from a memory, so that a device installed with the chip executes the random access method executed by the above-mentioned terminal device, or the above-mentioned network device executes Random access method.
  • the embodiment of the present application provides a computer program product, including computer program instructions, which cause a computer to execute the random access method executed by the aforementioned terminal device or the random access method executed by the aforementioned network device.
  • 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 the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

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Abstract

本申请公开了一种随机接入方法，包括：终端设备根据接收的随机接入响应(RAR)消息中携带的标识信息，确定所述RAR消息是否为针对所述终端设备的RAR消息。本申请还公开了另一种随机接入方法、电子设备及存储介质。

Description

一种随机接入方法、电子设备及存储介质 技术领域
本申请涉及无线通信技术领域，尤其涉及一种随机接入方法、电子设备及存储介质。
背景技术
在随机接入过程中，在终端设备接收随机接入响应(Random Access CHannel Response，RAR)消息的窗口时间大于10ms的情况下，终端设备如何确定所接收到的RAR消息是否为针对自身的RAR消息尚未被明确。
发明内容
为解决上述技术问题，本申请实施例提供一种随机接入方法、电子设备及存储介质，能够。
第一方面，本申请实施例提供一种随机接入方法，包括：终端设备根据接收的RAR消息中携带的标识信息，确定所述RAR消息是否为针对所述终端设备的RAR消息。。
第二方面，本申请实施例提供一种随机接入方法，包括：网络设备向终端设备发送RAR消息，所述RAR消息中携带标识信息，所述标识信息用于所述终端设备确定所述RAR消息是否为针对所述终端设备的RAR消息。
第三方面，本申请实施例提供一种终端设备，所述终端设备包括：处理单元，配置为根据接收的RAR消息中携带的标识信息，确定所述RAR消息是否为针对所述终端设备的RAR消息。
第四方面，本申请实施例提供一种网络设备，所述网络设备包括：发送单元，配置为向终端设备发送RAR消息，所述RAR消息中携带标识信息，所述标识信息用于所述终端设备确定所述RAR消息是否为针对所述终端设备的RAR消息。
第五方面，本申请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，本申请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，本申请实施例提供一种计算机存储介质，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，本申请实施例提供一种计算机存储介质，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。
第九方面，本申请实施例提供一种芯片，包括：处理器，用于从存储器中调用并运行计算机程序，使得安装有所述芯片的设备执行上述终端设备执行的随机接入方法，或者上述网络设备执行的随机接入方法。
第十方面，本申请实施例提供一种计算机程序产品，包括计算机程序指令，该计算机程序指令使得计算机执行上述终端设备执行的随机接入方法，或者上述网络设备执行的随机接入方法。
第十一方面，本申请实施例提供一种计算机程序，该计算机程序使得计算机执行上述终端设备执行的随机接入方法，或者上述网络设备执行的随机接入方法。
本申请实施例提供的随机接入方法，包括：终端设备根据接收的RAR消息中携带的标识信息，确定所述RAR消息是否为针对所述终端设备的RAR消息。如此，网络设备通过在RAR消息中携带标识信息，使得终端设备能够根据标识信息确定所述RAR消息是否为针对自身的RAR消息，避免终端设备根据不是针对自身的RAR消息中的指示进行Msg3的传输，从而降低随机接入的冲突。
附图说明
图1为本申请竞争随机接入过程的示意图；
图2为本申请RAR的格式示意图；
图3为本申请subheader的格式示意图；
图4为本申请MAC PDU的结构示意图；
图5为本申请RACH冲突的示意图；
图6为本申请实施例通信系统的组成结构示意图；
图7为本申请实施例随机接入方法的可选处理流程示意图；
图8为本申请实施例标识信息携带于MAC RAR中的示意图；
图9为本申请实施例RAR时间窗最大为20ms的无线帧及RAR时间窗示意图；
图10为本申请实施例标识信息携带于BI subheader中的示意图；
图11为本申请实施例终端设备的组成结构示意图；
图12为本申请实施例网络设备的组成结构示意图；
图13为本申请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申请实施例的特点和技术内容，下面结合附图对本申请实施例的实现进行详细阐述，所附附图仅供参考说明之用，并非用来限定本申请实施例。
在对本申请实施例提供的随机接入方法进行详细说明之前，先对相关技术中随机接入进行简要说明。
随着人们对速率、延迟、高速移动性、能效的追求以及未来生活中业务的多样性和复杂性，3GPP国际标准组织开始研发5G。5G的主要应用场景为：增强移动超宽带(Enhance Mobile Broadband，eMBB)、低时延高可靠通信(Ultra Reliable Low Latency Communications，URLLC)、和大规模机器类通信(Massive Machine Type Communication，mMTC)。
eMBB仍然以用户获得多媒体内容、服务和数据为目标，其需求增长十分迅速。另一方面，由于eMBB可能部署在不同的场景中，便如室内，市区，农村等，其能力和需求的差别也比较大，所以不能一概而论，必须结合具体的部署场景详细分析。URLLC的典型应用包括：工业自动化，电力自动化，远程医疗操作(手术)，交通安全保障等。mMTC的典型特点包括：高连接密度，小数据量，时延不敏感业务，模块的低成本和长使用寿命等。
在新无线(New Radio，NR)的早期部署中，完整的NR网络覆盖很难获取，所以典型的网络覆盖模式是广域的长期演进(Long Term Evolution，LTE)覆盖和NR的孤岛覆盖模式。而且用于LTE的频谱多部署在6GHz以下，可用于NR的6GHz以下频谱很少。所以NR必须研究6GHz以上的频谱应用；然而，高频段的覆盖范围有限、信号衰落快；同时为了保护移动运营商前期在LTE的投资，提出了LTE和NR之间紧密互通(tight  interworking)的工作模式。当然，NR也可以独立部署。
NR在下述几种工作场景中，也可以工作在非授权频段：
载波聚合场景：主小区(Primary Cell，PCell)为授权频谱，通过载波聚合方式聚合工作在非授权频谱上的辅小区(Secondary Cell，SCell)。
双连接工作场景：PCell为LTE授权频谱，PScell为NR非授权频谱。
独立工作场景：NR作为一个独立小区工作在非授权频谱。
通常，NR免授权频谱(NR-Unlicensed，NR-U)的工作频带(Band)为5GHz非授权频谱和6GHz非授权频谱，如：US5925–7125MHz、欧洲5925–6425MHz，或者其他频段；在非授权频谱上，NR-U的设计应该保证与其他已经工作在这些非授权频谱上的系统之间的公平性，比如，与WiFi等的公平性。公平性的原则是，NR-U对于已经部署在非授权频谱上的系统(比如，WiFi)的影响不能超过已经部署在非授权频谱上的系统之间的影响。
为了保证在非授权频谱上各系统之间的公平性共存，能量检测已经被同意作为一个基本的共存机制。一般的能量检测机制为先听后发(Listen Before Talk，LBT)机制，LBT机制的基本原理为，网络设备或者终端设备(及传输端设备)在非授权频谱上传输数据之前，需要先按照规定侦听一段时间。如果侦听的结果表示该信道为空闲状态，则传输端设备可以给接收端传输数据。如果侦听的结果表示该信道为占用状态，则传输端设备需要根据规定回退一段时间再继续侦听信道，知道信道侦听结果为空闲状态，才能向接收端设备传输数据。
LTE许可频谱辅助接入(Licensed-Assisted Access，LAA)非授权频段的信道接入中，针对下行数据传输，网络设备需要执行LBT；在LAA中，信道接入的优先级由下述表1决定。
Figure PCTCN2019110463-appb-000001
表1
其中，m p与执行信道接入的侦听信道时间有关系。具体的，网络设备需要先执行Td时间的信道侦听，其中，Td＝16us+m p×9us。
CW min，p和CW max，p与信道接入过程中的随机侦听信道时间有关系。具 体的，在网络设备侦听Td时间信道为空闲时，需要再侦听N次信道，每次侦听时长为9us。其中N为一个从0到CWp之间的随机数，而CW min,p≤CW p≤CW max,p。
T mcot，p为网络设备抢占到信道之后，占用信道的最长时间，它与网络设备采用的信道优先级有关系，比如优先级为1，则信道侦听成功之后，最多占用信道2ms。
因此，对于终端设备来说，网络设备给终端设备传输数据需要在最大信道占用时间(Maximum Channel Occupy Time，MCOT)之内完成；如果网络设备没有抢占到信道，也就是在MCOT时间之外，终端设备是不会收到网络设备给终端设备的调度数据的。
随机接入是终端设备与网络设备建立无线连接的重要过程，通过随机接入终端设备可以与网络设备之间取得上行同步，申请上行资源。随机接入过程分为竞争随机接入和非竞争随机接入。
竞争随机接入过程，如图1所示：
步骤1，终端设备向网络设备发送随机接入前导码(preamble)。
具体的，终端设备通过高层配置确定同步信号块(Synchronization Signal Block，SSB)与物理随机接入信道(Physical Random Access CHannel，PRACH)资源的关系；接收一组SSB并确定其参考信号接收功率(Reference Signal Receiving Power，RSRP)值，根据门限选择合适的SSB；基于选择的SSB和SSB与PRACH资源的对应关系确定PRACH资源；根据Msg3的大小选择前导码组(preamble group)；
设置目标接收功率等于preambleReceivedTargetPower+DELTA_PREAMBLE+(PREAMBLE_POWER_RAMPING_COUNTER–1)×power Ramping Step；在PRACH时频域资源上通过Msg1发送该序列。
步骤2，网络设备向终端设备发送RAR消息。
具体的，根据终端设备发送Msg1的PRACH时频域资源确定RA-RNTI；其中，RA-RNTI＝1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id。网络设备通过Msg2向终端设备发送与RA-RNTI对应的RAR消息。
终端设备在发送了Preamble之后的第一个物理下行控制信道(Physical Downlink Control Channel，PDCCH)时机(occasion)开启RAR时间窗(RACH-Response Window)并在该时间窗运行期间监听PDCCH，以接收对应RA-RNTI的RAR消息。如果终端设备在RAR监测窗口内没有收到 RAR消息，则终端设备进行msg1的重传；如果终端设备在RAR监测窗口内收到RAR消息，则终端设备根据RAR消息的指示进行Msg3的传输。
步骤3，终端设备基于RAR消息中的上行授权传输Msg3。
当Msg3传输后，终端设备启动随机接入竞争解决定时器(ra-ContentionResolutionTimer)，并在定时器运行期间监听PDCCH；当Msg3进行混合自动重传请求(Hybrid Automatic Repeat reQuest，HARQ)重传时，重启该定时器；在该定时器超时或停止之前，终端设备会一直监听PDCCH。
步骤4，冲突解决。
如果终端设备收到C-RNTI扰码的DCI format 1_0及其对应的PDSCH，随机接入完成。或者，如果终端设备收到TC-RNTI扰码的DCI format 1_0及其对应的PDSCH，并比对内容成功，随机接入完成。
在上述步骤2中，终端设备启动的RAR时间窗的时间长度小于或等于10ms。RAR的格式示意图，如图2所示，包括子包头(subheader)、RAPID、payload、上行(UpLink，UL)授权(grant)和Temporary C-RNTI；其中，subheader的格式示意图，如图3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。
在NR-U中，终端设备发起随机接入过程中，无论是竞争随机接入还是非竞争随机接入，会存在由于终端设备信道抢占不成功，导致网络设备在10ms内不能发送Msg2(即RAR响应消息)的情况。因此，在NR-U中，需要将RAR时间窗的尺寸进一步扩大，使得RAR时间窗大于10ms。
如果RAR时间窗的尺寸大于10ms，则有可能导致网络设备根据两个不同的终端设备在至少两个10ms的系统帧选择的随机接入机会(RACH Occation，RO)资源，能够计算出相同的RA-RNTI。网络设备向终端设备发送携带RA-RNTI的RAR消息时，终端设备不能够确定该RAR消息是否为针对自身的RAR消息；进而导致RACH的冲突进一步增大。举例来说，RACH冲突的示意图，如图5所示，第一终端设备在第一无线帧的第一个时隙发送Preamble，第一终端设备开启的RAR时间窗为从第一无线帧的第三个时隙的起始时刻之后的20ms；第二终端设备在第二无线帧的第一个时隙发送Preamble，第二终端设备开启RAR时间窗为从第二无线帧的第三个时隙的起始时刻之后的20ms。根据第一终端设备发送的Preamble的PRACH 资源确定的RA-RNTI，与根据第二终端设备发送的Preamble的PRACH资源确定的RA-RNTI可能相同；在图5所示的阴影部分标识的位置，第一终端设备和第二终端设备可能接收到携带相同的RA-RNTI的RAR消息。此时，第一终端设备和第二终端设备无法确定该RAR消息是否为针对自身的RAR消息。当任意一个终端设备根据不是针对自身的RAR消息的指示进行Msg3传输时，将导致随机接入的冲突进一步增大。
本申请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)、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)，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。
本申请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S201，终端设备接收网络设备发送的RAR消息。
步骤S202，终端设备根据RAR消息中携带的标识信息，确定所述RAR消息是否为针对所述终端设备的RAR消息。
在一些实施例中，所述标识信息为无线帧标识(frame id)。
在一些实施例中，终端设备根据接收的RAR消息中携带的标识信息，确定所述RAR消息是否为针对所述终端设备的RAR消息时，在所述终端设备传输前导码的系统帧号(System Frame Number，SFN)对RAR时间窗包含的系统帧数量取模运算得到的值，与所述标识信息对应的值匹配的情况下，所述终端设备确定所述RAR消息是针对所述终端设备的RAR消息；在所述终端设备传输前导码的系统帧号对RAR时间窗包含的系统帧数量取模运算得到的值，与所述标识信息对应的值不匹配的情况下，所述终端设备确定所述RAR消息不是针对所述终端设备的RAR消息。其中，匹配也可以理解为相等，即，在所述终端设备传输前导码的系统帧号对RAR时间窗包含的系统帧数量取模运算得到的值，与所述标识信息对应的值相等的情况下，所述终端设备确定所述RAR消息是针对所述终端设备的RAR消息；在所述终端设备传输前导码的系统帧号对RAR时间窗包含的系统帧数量取模运算得到的值，与所述标识信息对应的值不相等的情况下，所述终端设备确定所述RAR消息不是针对所述终端设备的RAR消息。
其中，所述标识信息对应的值，可以是表征所述标识信息的比特位的值转换为十进制之后的值；举例来说，表征所述标识信息的比特位的值为00，则所述标识信息对应的值为0；表征所述标识信息的比特位的值为01，则所述标识信息对应的值为1；所述标识信息的比特位的值为10，则所述标识信息对应的值为2；所述标识信息的比特位的值为11，则所述标识信息对应的值为3。
在具体实施时，终端设备传输前导码的系统帧号为5；RAR时间窗为40ms，则RAR时间窗包含的系统帧数量为4；终端设备传输前导码的系统帧号对RAR时间窗包含的系统帧数量取模运算得到的值为1。若表征所述标识信息的比特位的值为1、或者表征所述标识信息的比特位的值为10，则所述标识信息对应的值为1。在该场景下，终端设备传输前导码的系统帧号对RAR时间窗包含的系统帧数量取模运算得到的值与所述标识信息对应的值相等，所述终端设备确定所述RAR消息是针对所述终端设备的RAR消息。若表征所述标识信息的比特位的值为0、或者表征所述标识信息的比特位的值为00，则所述标识信息对应的值为0。在该场景下，终端设备传 输前导码的系统帧号对RAR时间窗包含的系统帧数量取模运算得到的值与所述标识信息对应的值不相等，所述终端设备确定所述RAR消息不是针对所述终端设备的RAR消息。
在一种可选实施方式中，所述标识信息携带于MAC RAR中；由于MAC RAR包含在MAC subPDU中，因此，也可以理解为所述标识信息携带于MAC subPDU。在具体实施时，所述标识信息携带于MAC RAR中的示意图，如图8所示，标识信息通过所述MAC RAR中预留比特位(R比特位)的值表征。举例来说，R比特位的值为0时，所述标识信息为0；R比特位的值为1时，所述标识信息为1。由于MAC RAR中仅有一个R比特位，因此，所示标识信息携带于MAC RAR中的情况，适用于RAR时间窗最大为20ms的场景。针对RAR时间窗最大为20ms的无线帧及RAR时间窗示意图，如图9所示。应用本申请实施例，能够区分图9中用阴影部分标识的时隙中的RO资源
由于一个RAR消息中包括多个MAC RAR，因此，所述终端设备首先在MAC RAR中查找与所述终端设备传输的前导码的索引(preamble index)对应的MAC RAR；终端设备再遍历查找到的MAC RAR；直至所述终端设备传输前导码的系统帧号对RAR时间窗包含的系统帧数量取模运算得到的值，与MAC RAR中携带的标识信息对应的值匹配；或者，所述终端设备传输前导码的系统帧号对RAR时间窗包含的系统帧数量取模运算得到的值，与MAC RAR中携带的标识信息对应的值不匹配的情况下，直至遍历所查找到的全部MAC RAR。其中，与所述终端设备传输的preamble index对应的MAC RAR，可以是所包括的随机接入前导码标识(Random Access Pramble Identifier，RAP ID)与终端设备传输的前导码的索引相等的MAC RAR；因此，终端设备查找得到的MAC RAR所包括的RAP ID与终端设备传输的前导码的索引相等。
即，终端设备查找RAR包括的第一MAC RAR中携带的标识信息，将终端设备传输前导码的系统帧号对RAR时间窗包含的系统帧数量取模运算得到的值，与第一MAC RAR中携带的标识信息对应的值进行比较；若比较结果为不匹配，终端查找RAR消息包括的第二MAC RAR中携带的标识信息，将终端设备传输前导码的系统帧号对RAR时间窗包含的系统帧数量取模运算得到的值，与第二MAC RAR中携带的标识信息对应的值进行比较；若比较结果为匹配，则终端设备确定所述RAR消息为针对自身的RAR消息；若比较结果为不匹配，则终端设备继续查找RAR消息包括的除第一 个MAC RAR和第二MAC RAR以外的MAC RAR中携带的标识信息，直至RAR消息包括的所有MAC RAR中携带的标识信息对应的值，与终端设备传输前导码的系统帧号对RAR时间窗包含的系统帧数量取模运算得到的值均不匹配，终端设备确定所述RAR消息不是针对自身的RAR消息。
在另一种可选实施方式中，所述标识信息携带于回退指示(Backoff Indicator，BI)子包头(subheader)中。在具体实施时，所述标识信息携带于BI subheader中的示意图，如图10所示，标识信息通过所述BI subheader中预留比特位(R比特位)的值表征。举例来说，R比特位的值为00时，所述标识信息为0；R比特位的值为01时，所述标识信息为1；R比特位的值为10时，所述标识信息为2；R比特位的值为11时，所述标识信息为3。由于BI subheader中有两个R比特位，因此，所示标识信息携带于MAC RAR中的情况，适用于RAR时间窗最大为40ms的场景。
通过在BI subheader中携带标识信息，使得终端设备能够确定RAR消息是否为针对自身的RAR消息，在终端设备确定所述RAR消息为针对自身的RAR消息时，所述终端设备再进一步解码BI subheader对应的MAC subPDU。若终端设备确定所述RAR消息不是针对自身的RAR消息时，所述终端设备不对BI subheader对应的MAC subPDU进行解码。
在又一种可选实施方式中，所述标识信息携带于第一subheader中，所述第一subheader与BI subheader不同。可以理解为，所述第一subheader为不同于已有的subheader的新的subheader；第一subheader除了包括已有的subheader中的一些域，如E/T/RAPID，还增加至少一个比特位，通过所述第一subheader中至少一个比特位的值表征标识信息。由于第一subheader中表征标识信息的比特位的数量为至少一个，因此随着表征标识信息的比特位数量的增多，能够适用于更大尺寸的RAR时间窗。
通过在第一subheader中携带标识信息，使得终端设备能够确定RAR消息是否为针对自身的RAR消息，在终端设备确定所述RAR消息为针对自身的RAR消息时，所述终端设备再进一步解码第一subheader对应的MAC subPDU。若终端设备确定所述RAR消息不是针对自身的RAR消息时，所述终端设备不对第一subheader对应的MAC subPDU进行解码。
本申请实施例中，通过在RAR消息中携带标识信息，使得终端设备能够根据标识信息确定所述RAR消息是否为针对自身的RAR消息，避免终端设备根据不是针对自身的RAR消息中的指示进行Msg3的传输，从而降低随机接入的冲突。
应理解，在本申请的各种实施例中，上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本申请实施例的实施过程构成任何限定。
为实现上述随机接入方法，本申请实施例提供一种终端设备，所述终端设备300的组成结构，如图11所示，包括：
处理单元301，配置为根据接收的RAR消息中携带的标识信息，确定所述RAR消息是否为针对所述终端设备的RAR消息。
在一些实施例中，所述标识信息为无线帧标识。
在一些实施例中，所述标识信息携带于MAC RAR中。
在一些实施例中，所述标识信息通过所述MAC RAR中预留比特位的值表征。
在一些实施例中，所述标识信息携带于BI subheader中。
在一些实施例中，所述标识信息通过所述BI subheader中预留比特位的值表征。
在一些实施例中，所述标识信息携带于第一subheader中，所述第一subheader与BI subheader不同。
在一些实施例中，所述标识信息通过所述第一subheader中至少一个比特位的值表征。
在一些实施例中，所述处理单元301，配置为所述终端设备传输前导码的系统帧号对RAR时间窗包含的系统帧数量取模运算得到的值，与所述标识信息对应的值匹配的情况下，确定所述RAR消息是针对所述终端设备的RAR消息；
或者，所述终端设备传输前导码的系统帧号对RAR时间窗包含的系统帧数量取模运算得到的值，与所述标识信息对应的值不匹配的情况下，确定所述RAR消息不是针对所述终端设备的RAR消息。
在一些实施例中，所述处理单元301，配置为在所述标识信息携带于MAC RAR的情况下，所述终端设备在所述RAR消息包括的MAC RAR中查找与所述终端设备传输的前导码的索引对应的MAC RAR；
遍历所查找到的MAC RAR直至所述终端设备传输前导码的系统帧号对RAR时间窗包含的系统帧数量取模运算得到的值，与所述标识信息对应的值匹配；或者，直至遍历所查找到的全部MAC RAR。
为实现上述随机接入方法，本申请实施例提供一种网络设备，所述网络设备400的组成结构，如图12所示，包括：
发送单元401，配置为向终端设备发送RAR消息，所述RAR消息中携带标识信息，所述标识信息用于所述终端设备确定所述RAR消息是否为针对所述终端设备的RAR消息。
在一些实施例中，所述标识信息为无线帧标识。
在一些实施例中，所述标识信息携带于MAC RAR中。
在一些实施例中，所述标识信息通过所述MAC RAR中预留比特位的值表征。
在一些实施例中，所述标识信息携带于BI subheader中。
在一些实施例中，所述标识信息通过所述BI subheader中预留比特位的值表征。
在一些实施例中，所述标识信息携带于第一subheader中，所述第一subheader与BI subheader不同。
在一些实施例中，所述标识信息通过所述第一subheader中至少一个比特位的值表征。
本申请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。
本申请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13是本申请实施例的电子设备(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13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)。本申请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。
本申请实施例中的存储器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。实现本申请实施例方法的程序可以包含在应用程序7022中。
上述本申请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计算机存储介质，用于存储可执行程序。
可选的，该计算机存储介质可应用于本申请实施例中的终端设备，并且该可执行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，该计算机存储介质可应用于本申请实施例中的网络设备，并且该可执行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。
本申请实施例提供一种芯片，包括：处理器，用于从存储器中调用并运行计算机程序，使得安装有所述芯片的设备执行上述终端设备执行的随机接入方法，或者上述网络设备执行的随机接入方法。
本申请实施例提供一种计算机程序产品，包括计算机程序指令，该计算机程序指令使得计算机执行上述终端设备执行的随机接入方法，或者上述网络设备执行的随机接入方法。
本申请是参照根据本申请实施例的方法、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，仅为本申请的较佳实施例而已，并非用于限定本申请的保护范围，凡在本申请的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本申请的保护范围之内。

Claims (46)

  1. 一种随机接入方法，所述方法包括：
    终端设备根据接收的随机接入响应RAR消息中携带的标识信息，确定所述RAR消息是否为针对所述终端设备的RAR消息。
  2. 根据权利要求1所述的方法，其中，所述标识信息为无线帧标识。
  3. 根据权利要求1或2所述的方法，其中，所述标识信息携带于媒体接入控制随机接入响应MAC RAR中。
  4. 根据权利要求3所述的方法，其中，所述标识信息通过所述MAC RAR中预留比特位的值表征。
  5. 根据权利要求1或2所述的方法，其中，所述标识信息携带于回退指示子包头BI subheader中。
  6. 根据权利要求5所述的方法，其中，所述标识信息通过所述BI subheader中预留比特位的值表征。
  7. 根据权利要求1或2所述的方法，其中，所述标识信息携带于第一subheader中，所述第一subheader与BI subheader不同。
  8. 根据权利要求7所述的方法，其中，所述标识信息通过所述第一subheader中至少一个比特位的值表征。
  9. 根据权利要求1至8任一项所述的方法，其中，所述终端设备根据接收的RAR消息中携带的标识信息，确认所述RAR消息是否为针对所述终端设备的RAR消息，包括：
    所述终端设备传输前导码的系统帧号对RAR时间窗包含的系统帧数量取模运算得到的值，与所述标识信息对应的值匹配的情况下，所述终端设备确定所述RAR消息是针对所述终端设备的RAR消息；
    或者，所述终端设备传输前导码的系统帧号对RAR时间窗包含的系统帧数量取模运算得到的值，与所述标识信息对应的值不匹配的情况下，所述终端设备确定所述RAR消息不是针对所述终端设备的RAR消息。
  10. 根据权利要求9所述的方法，其中，所述终端设备根据接收的RAR消息中携带的标识信息，确认所述RAR消息是否为针对所述终端设备的RAR消息，包括：
    在所述标识信息携带于MAC RAR的情况下，所述终端设备在所述RAR消息包括的MAC RAR中查找与所述终端设备传输的前导码的索引对应的MAC RAR；
    遍历所查找到的MAC RAR，直至所述终端设备传输前导码的系统帧号对RAR时间窗包含的系统帧数量取模运算得到的值，与所述标识信息对应的值匹配；或者，直至遍历所查找到的全部MAC RAR。
  11. 一种随机接入方法，所述方法包括：
    网络设备向终端设备发送随机接入响应RAR消息，所述RAR消息中携带标识信息，所述标识信息用于所述终端设备确定所述RAR消息是否为针对所述终端设备的RAR消息。
  12. 根据权利要求11所述的方法，其中，所述标识信息为无线帧标识。
  13. 根据权利要求11或12所述的方法，其中，所述标识信息携带于媒体接入控制随机接入响应MAC RAR中。
  14. 根据权利要求13所述的方法，其中，所述标识信息通过所述MAC RAR中预留比特位的值表征。
  15. 根据权利要求11或12所述的方法，其中，所述标识信息携带于回退指示子包头BI subheader中。
  16. 根据权利要求15所述的方法，其中，所述标识信息通过所述BI subheader中预留比特位的值表征。
  17. 根据权利要求11或12所述的方法，其中，所述标识信息携带于第一subheader中，所述第一subheader与BI subheader不同。
  18. 根据权利要求17所述的方法，其中，所述标识信息通过所述第一subheader中至少一个比特位的值表征。
  19. 一种终端设备，所述终端设备包括：
    处理单元，配置为根据接收的随机接入响应RAR消息中携带的标识信息，确定所述RAR消息是否为针对所述终端设备的RAR消息。
  20. 根据权利要求19所述的终端设备，其中，所述标识信息为无线帧标识。
  21. 根据权利要求19或20所述的终端设备，其中，所述标识信息携带于媒体接入控制随机接入响应MAC RAR中。
  22. 根据权利要求21所述的终端设备，其中，所述标识信息通过所述MAC RAR中预留比特位的值表征。
  23. 根据权利要求19或20所述的终端设备，其中，所述标识信息携带于回退指示子包头BI subheader中。
  24. 根据权利要求23所述的终端设备，其中，所述标识信息通过所述BI subheader中预留比特位的值表征。
  25. 根据权利要求19或20所述的终端设备，其中，所述标识信息携带于第一subheader中，所述第一subheader与BI subheader不同。
  26. 根据权利要求25所述的终端设备，其中，所述标识信息通过所述第一subheader中至少一个比特位的值表征。
  27. 根据权利要求19至26任一项所述的终端设备，其中，所述处理单元，配置为所述终端设备传输前导码的系统帧号对RAR时间窗包含的系统帧数量取模运算得到的值，与所述标识信息对应的值匹配的情况下，确定所述RAR消息是针对所述终端设备的RAR消息；
    或者，所述终端设备传输前导码的系统帧号对RAR时间窗包含的系统帧数量取模运算得到的值，与所述标识信息对应的值不匹配的情况下，确定所述RAR消息不是针对所述终端设备的RAR消息。
  28. 根据权利要求27所述的终端设备，其中，所述处理单元，配置为在所述标识信息携带于MAC RAR的情况下，在所述RAR消息包括的MAC RAR中查找与所述终端设备传输的前导码的索引对应的MAC RAR；
    遍历所查找到的MAC RAR，直至所述终端设备传输前导码的系统帧号对RAR时间窗包含的系统帧数量取模运算得到的值，与所述标识信息对应的值匹配；或者，直至遍历所查找到的全部MAC RAR。
  29. 一种网络设备，所述网络设备包括：
    发送单元，配置为向终端设备发送随机接入响应RAR消息，所述RAR消息中携带标识信息，所述标识信息用于所述终端设备确定所述RAR消息是否为针对所述终端设备的RAR消息。
  30. 根据权利要求29所述的网络设备，其中，所述标识信息为无线帧标识。
  31. 根据权利要求29或30所述的网络设备，其中，所述标识信息携带于媒体接入控制随机接入响应MAC RAR中。
  32. 根据权利要求31所述的网络设备，其中，所述标识信息通过所述MAC RAR中预留比特位的值表征。
  33. 根据权利要求29或30所述的网络设备，其中，所述标识信息携带于回退指示子包头BI subheader中。
  34. 根据权利要求33所述的网络设备，其中，所述标识信息通过所述BI subheader中预留比特位的值表征。
  35. 根据权利要求29或30所述的网络设备，其中，所述标识信息携带于第一subheader中，所述第一subheader与BI subheader不同。
  36. 根据权利要求35所述的网络设备，其中，所述标识信息通过所述第一subheader中至少一个比特位的值表征。
  37. 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10任一项所述的随机接入方法的步骤。
  38. 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11至18任一项所述的随机接入方法的步骤。
  39. 一种计算机存储介质，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10任一项所述的随机接入方法。
  40. 一种计算机存储介质，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11至18任一项所述的随机接入方法。
  41. 一种计算机程序产品，包括计算机程序指令，该计算机程序指令使得计算机执行如权利要求1至10任一项所述的随机接入方法。
  42. 一种计算机程序产品，包括计算机程序指令，该计算机程序指令使得计算机执行如权利要求11至18任一项所述的随机接入方法。
  43. 一种计算机程序，所述计算机程序使得计算机执行如权利要求1至10任一项所述的随机接入方法。
  44. 一种计算机程序，所述计算机程序使得计算机执行如权利要求11至18任一项所述的随机接入方法。
  45. 一种芯片，包括：处理器，用于从存储器中调用并运行计算机程序，使得安装有所述芯片的设备执行如权利要求1至10任一项所述的随机接入方法。
  46. 一种芯片，包括：处理器，用于从存储器中调用并运行计算机程序，使得安装有所述芯片的设备执行如权利要求11至18任一项所述的随机接入方法。
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