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WO2023130903A1 - Procédé et appareil d'envoi de canal d'accès aléatoire physique (prach), et support d'enregistrement - Google Patents

Procédé et appareil d'envoi de canal d'accès aléatoire physique (prach), et support d'enregistrement Download PDF

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Publication number
WO2023130903A1
WO2023130903A1 PCT/CN2022/138073 CN2022138073W WO2023130903A1 WO 2023130903 A1 WO2023130903 A1 WO 2023130903A1 CN 2022138073 W CN2022138073 W CN 2022138073W WO 2023130903 A1 WO2023130903 A1 WO 2023130903A1
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WIPO (PCT)
Prior art keywords
lbt
random access
prach
sending
access preamble
Prior art date
Application number
PCT/CN2022/138073
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English (en)
Chinese (zh)
Inventor
王俊伟
Original Assignee
大唐移动通信设备有限公司
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Publication date
Priority claimed from CN202210126392.0A external-priority patent/CN116471704A/zh
Application filed by 大唐移动通信设备有限公司 filed Critical 大唐移动通信设备有限公司
Publication of WO2023130903A1 publication Critical patent/WO2023130903A1/fr

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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

  • the present disclosure relates to the field of communication technologies, and in particular to a method, device and storage medium for sending a Physical Random Access Channel (PRACH).
  • PRACH Physical Random Access Channel
  • the 5th Generation Mobile Communication Technology complies with the listen before talk (LBT) rule in the unlicensed spectrum operation of the R16 standard of the New Radio (NR) base station system, That is, if the base station/terminal device wants to send a signal, it can listen to the channel.
  • LBT listen before talk
  • NR New Radio
  • the LBT process is not performed, and the PRACH is directly transmitted on the physical random access channel.
  • PRACH Physical Random Access Channel
  • the LBT failure processing cannot be performed effectively, so that the terminal device easily enters a state where the link is abnormally unavailable, which affects the stability of the link.
  • the present disclosure aims to solve one of the technical problems in the related art at least to a certain extent.
  • the purpose of this disclosure is to propose a method, device, storage medium, computer program product, and computer program for sending a physical random access channel PRACH, so as to realize that the PRACH is configured to be exempt from listening first in the process of sending a random access preamble
  • LBT the effective implementation of LBT failure processing can effectively avoid link abnormalities, thereby effectively maintaining the stability of the link.
  • the embodiment of the first aspect of the present disclosure proposes a method for sending a physical random access channel PRACH, including: when the terminal device is configured to listen first and then talk LBT fails to restore the configuration, sending a random access preamble on the PRACH , execute the LBT; if the execution of the LBT fails, execute the failure handling process of the LBT.
  • the method for sending the physical random access channel PRACH proposed by the embodiment of the first aspect of the present disclosure is to perform LBT when the PRACH sends the random access preamble when the terminal device is configured to listen first and then talk when the LBT fails to restore the configuration.
  • the LBT failure processing process is executed to implement LBT failure processing effectively when PRACH is configured to be exempted from listening before speaking LBT in the process of sending random access preambles, which can effectively avoid link failure. abnormal, thus effectively maintaining the stability of the link.
  • the embodiment of the second aspect of the present disclosure proposes an apparatus for sending a physical random access channel PRACH, including: a first execution unit, configured to restore the configuration when the terminal device is configured to listen before speaking and the LBT fails to restore the configuration.
  • a first execution unit configured to restore the configuration when the terminal device is configured to listen before speaking and the LBT fails to restore the configuration.
  • the LBT is executed;
  • the second executing unit is configured to execute the failure processing procedure of the LBT when the execution of the LBT fails.
  • the device for sending the physical random access channel PRACH proposed by the embodiment of the second aspect of the present disclosure performs LBT when the PRACH sends a random access preamble when the terminal device is configured to listen first and then talk LBT fails to restore the configuration,
  • the LBT failure processing process is executed to implement LBT failure processing effectively when PRACH is configured to be exempted from listening before speaking LBT in the process of sending random access preambles, which can effectively avoid link failure. abnormal, thus effectively maintaining the stability of the link.
  • the embodiment of the third aspect of the present disclosure proposes a device for sending a physical random access channel PRACH, including: a memory, a transceiver, and a processor: a memory for storing computer programs; Sending and receiving data under control; the processor is used to read the computer program in the memory and perform the following operations: in the case that the terminal device is configured to listen first and then talk LBT fails to restore the configuration, send a random access preamble on the PRACH When executing the LBT code, execute the LBT; if the execution of the LBT fails, execute the failure handling process of the LBT.
  • the device for sending the physical random access channel PRACH proposed by the embodiment of the third aspect of the present disclosure performs LBT when the PRACH sends a random access preamble when the terminal device is configured to listen first and then talk when the LBT fails to restore the configuration.
  • the LBT failure processing process is executed to implement LBT failure processing effectively when PRACH is configured to be exempted from listening before speaking LBT in the process of sending random access preambles, which can effectively avoid link failure. abnormal, thus effectively maintaining the stability of the link.
  • the embodiment of the fourth aspect of the present disclosure provides a processor-readable storage medium, the processor-readable storage medium stores a computer program, and the computer program is used to enable the processor to execute the embodiment of the first aspect of the present disclosure.
  • the processor-readable storage medium proposed in the embodiment of the fourth aspect of the present disclosure implements LBT when the PRACH sends a random access preamble when the terminal device is configured to listen first and then talk when the LBT fails to restore the configuration.
  • execute the LBT failure processing process to realize that when the PRACH is configured to be exempt from listening to the LBT in the process of sending the random access preamble, the LBT failure processing can be effectively performed, which can effectively avoid link abnormalities, thereby Effectively maintain the stability of the link.
  • the embodiment of the fifth aspect of the present disclosure provides a computer program product, including a computer program.
  • the computer program is executed by a processor, the method for sending a physical random access channel PRACH as proposed in the embodiment of the first aspect of the present disclosure is implemented.
  • the embodiment of the sixth aspect of the present disclosure provides a computer program, the computer program includes computer program code, when the computer program code is run on the computer, the computer executes the sending physical A method of random access channel PRACH.
  • the computer program product and computer program proposed in the embodiments of the fifth aspect and the sixth aspect of the present disclosure perform LBT when the terminal device is configured to listen first and then talk LBT fails to restore the configuration, when the random access preamble is sent on the PRACH , in the case of failure to execute LBT, execute the failure processing process of LBT, and implement LBT failure processing effectively when PRACH is configured to be exempted from LBT during the process of sending random access preamble, which can effectively avoid chaining In order to effectively maintain the stability of the link.
  • FIG. 1 is a schematic flowchart of a method for sending a physical random access channel PRACH proposed by an embodiment of the present disclosure
  • FIG. 2 is a schematic flowchart of a method for sending a physical random access channel PRACH proposed by another embodiment of the present disclosure
  • FIG. 3 is a schematic flowchart of a method for sending a physical random access channel PRACH proposed by another embodiment of the present disclosure
  • FIG. 4 is a schematic flowchart of a method for sending a physical random access channel PRACH proposed by another embodiment of the present disclosure
  • FIG. 5 is a schematic diagram of the LBT failure processing flow in an embodiment of the present disclosure.
  • FIG. 6 is a schematic flowchart of a method for sending a physical random access channel PRACH proposed by another embodiment of the present disclosure
  • FIG. 7 is a schematic flowchart of a method for sending a physical random access channel PRACH proposed by another embodiment of the present disclosure.
  • FIG. 8 is a schematic flowchart of a method for sending a physical random access channel PRACH proposed by another embodiment of the present disclosure
  • FIG. 9 is a schematic structural diagram of a device for sending a physical random access channel PRACH proposed by an embodiment of the present disclosure.
  • FIG. 10 is a schematic structural diagram of a device for sending a physical random access channel PRACH proposed by another embodiment of the present disclosure.
  • Fig. 11 is a schematic structural diagram of an apparatus for sending a physical random access channel (PRACH) proposed by another embodiment of the present disclosure.
  • PRACH physical random access channel
  • This disclosure is just to solve the technical problem that the related technology cannot effectively perform LBT failure processing, which makes the terminal equipment easily enter the abnormal and unavailable state of the link and affects the stability of the link. It provides a physical random
  • the method of accessing the PRACH channel is to implement LBT when it is configured to exempt from listening first and then talk LBT during the process of sending random access preambles on PRACH. In the process of accessing the preamble, when it is configured to be exempt from LBT, it can effectively execute LBT failure processing, which can effectively avoid link abnormalities, and thus effectively maintain the stability of the link.
  • the applicable system may be a global system of mobile communication (GSM) system, a code division multiple access (CDMA) system, a wideband code division multiple access (WCDMA) general packet Wireless business (general packet radio service, GPRS) system, long term evolution (long term evolution, LTE) system, LTE frequency division duplex (frequency division duplex, FDD) system, LTE time division duplex (time division duplex, TDD) system, Long term evolution advanced (LTE-A) system, universal mobile telecommunications system (UMTS), worldwide interoperability for microwave access (WiMAX) system, 5G new air interface (New Radio, NR) system, etc.
  • GSM global system of mobile communication
  • CDMA code division multiple access
  • WCDMA wideband code division multiple access
  • GPRS general packet Wireless business
  • long term evolution long term evolution
  • LTE long term evolution
  • LTE frequency division duplex frequency division duplex
  • FDD frequency division duplex
  • TDD time division duplex
  • LTE-A Long term evolution advanced
  • Fig. 1 is a schematic flowchart of a method for sending a physical random access channel (PRACH) proposed by an embodiment of the present disclosure.
  • PRACH physical random access channel
  • the execution subject of the method for sending the physical random access channel PRACH in this embodiment is a device for sending the physical random access channel PRACH, and the device can be implemented by software and/or hardware, and the device can configured in the terminal device.
  • a terminal device refers to a communication device that can transmit and receive a digital signal, and the terminal device can send a signal to a network device through a channel.
  • the terminal device involved in the embodiments of the present disclosure may be a device that provides voice and/or data connectivity to users, a handheld device with a wireless connection function, or other processing devices connected to a wireless modem. End devices may have different names on different systems.
  • a terminal device may be called a user equipment (User Equipment, UE).
  • the wireless terminal device can communicate with one or more core networks (Core Network, CN) via the radio access network (Radio Access Network, RAN), and the wireless terminal device can be a mobile terminal device, such as a mobile phone (or called a "cellular "telephones) and computers with mobile terminal equipment, such as portable, pocket, hand-held, computer built-in or vehicle-mounted mobile devices, which exchange language and/or data with the radio access network.
  • Core Network Core Network
  • RAN Radio Access Network
  • Wireless terminal equipment can also be called system, subscriber unit, subscriber station, mobile station, mobile station, remote station, access point , remote terminal (remote terminal), access terminal (access terminal), user terminal (user terminal), user agent (user agent), and user device (user device), which are not limited in the embodiments of the present disclosure.
  • the network device can be used to interchange received over-the-air frames with Internet Protocol (IP) packets and act as a router between the wireless terminal device and the rest of the access network, which can include the Internet Protocol (IP) communication network.
  • IP Internet Protocol
  • Network devices may also coordinate attribute management for the air interface.
  • the network equipment involved in the embodiments of the present disclosure may be a network equipment (Base Transceiver Station, BTS) in Global System for Mobile communications (GSM) or Code Division Multiple Access (Code Division Multiple Access, CDMA) ), it can also be a network device (NodeB) in Wide-band Code Division Multiple Access (WCDMA), or it can be an evolved network device in a long-term evolution (long term evolution, LTE) system (evolutional Node B, eNB or e-NodeB), 5G base station (gNB) in the 5G network architecture (next generation system), can also be a home evolved base station (Home evolved Node B, HeNB), relay node (relay node) , a home base station (femto), a pico base station (pico), etc., are not limited in this embodiment of the present disclosure.
  • a network device may include a centralized unit (centralized unit, CU) node and a distributed unit (distributed unit, DU) node
  • MIMO transmission can be Single User MIMO (Single User MIMO, SU-MIMO) or Multi-User MIMO (Multiple User MIMO, MU-MIMO).
  • MIMO transmission can be 2D-MIMO, 3D-MIMO, FD-MIMO, or massive-MIMO, or diversity transmission, precoding transmission, or beamforming transmission, etc.
  • the method for sending a physical random access channel PRACH includes: S101-S102.
  • a physical random access channel refers to an access channel when a terminal device (such as a user equipment UE) initiates a call, and can be formed with an access channel (Random Access Channel, RACH)
  • RACH Random Access Channel
  • the mapping is used to transmit the RACH, that is to say, it can be used to bear the transmission signal from the RACH.
  • the random access preamble is the actual content sent by the UE on the physical random access channel PRACH, which is composed of a signal sequence.
  • the process of sending the random access preamble on the PRACH can be called sending a physical random access preamble The process of accessing the channel PRACH.
  • the listen before talk (LBT) rule means that if a signal is to be sent on the channel, the channel can be monitored, and if the channel shows that it is idle, the signal can be sent on the channel, if Channel failure, that is, the channel is busy, may cause failure when sending related signals.
  • executing LBT refers to listening to the channel, successful execution of LBT means that the channel state is idle, and can trigger sending a random access preamble on the PRACH, and failure of LBT execution means that the channel state is busy. Sending the random access preamble on the PRACH may cause sending failure.
  • the LBT failure recovery configuration after listening first refers to the processing strategy set after multiple executions of LBT failures after the LBT failure
  • the LBT failure recovery configuration can be set to use the LBT execution result as the judgment condition , and according to the judgment conditions, instruct the terminal equipment to switch the active uplink subset bandwidth (Bandwidth Part, BWP), that is to say, switch the BWP that sends the random access preamble on the PRACH, stop the ongoing RACH process, and re-initiate the random access preamble
  • BWP active uplink subset bandwidth
  • the process of accessing the RACH channel, the process of re-initiating the RACH can be implemented by high-level processing in the terminal device, and completes processing operations such as parameter initialization for the RACH process.
  • the terminal device when the terminal device is configured to listen first and then talk when the LBT fails to restore the configuration, when the PRACH sends the random access preamble, it can execute LBT to listen to the channel to obtain the execution result of LBT , if the LBT execution is successful, indicating that the channel state is idle, it can trigger the sending of the random access preamble on the PRACH, and the LBT execution fails, indicating that the channel state is busy.
  • the terminal can still send the random access preamble on the PRACH, but it may cause The RACH process failed.
  • the terminal device is configured to restore the configuration if the LBT fails to be configured, then for sending the random access preamble on the PRACH
  • LBT can be performed first, and then the process of sending the random access preamble on the PRACH can be performed, or the process of sending the random access preamble on the PRACH can be performed first, and then the LBT can be performed, which is not limited.
  • the failure to perform LBT means that the channel is in a busy state, and when the random access preamble is sent on the PRACH, it may cause a sending failure.
  • the LBT failure handling process refers to the failure handling strategy for the process of sending the random access preamble on the PRACH after the channel fails to perform LBT.
  • the LBT failure handling process may, for example, include performing random access resource selection procedure, or any other possible failure handling strategy, without limitation.
  • LBT fails to restore the configuration, and when PRACH sends a random access preamble, after executing LBT, the execution result of LBT can be obtained, wherein, LBT The execution result can be success or failure.
  • the successful execution of LBT means that the channel state is idle, which can trigger the sending of random access preamble on PRACH.
  • the failure of LBT execution means that the channel state is busy. At this time, it indicates that if the random access preamble is sent on PRACH code, the sending may fail.
  • the indication result of LBT execution failure is received, it indicates that the execution of LBT fails, and the failure processing process of LBT can be executed, and the random access resource selection process can be executed, wherein the execution of the random access resource selection process can be Satisfy certain execution conditions, the execution conditions include receiving the LBT failure indication reported by the physical layer in the terminal device (the LBT failure indication is used to indicate the failure to execute LBT), which is not configured during the process of sending the random access preamble on the PRACH Exempt from listening before speaking LBT, and configuring LBT failure recovery configuration, if the execution conditions of the random access resource selection process are met, the random access resource selection process can be performed, and the random access preamble can be sent on the PRACH again.
  • the LBT failure indication is used to indicate the failure to execute LBT
  • LBT fails to restore the configuration
  • the PRACH sends the random access preamble
  • LBT is executed
  • the failure processing process of LBT is executed
  • the PRACH is configured to be exempt from the LBT in the process of sending the random access preamble
  • the LBT failure processing can be effectively performed, and the link abnormality can be effectively avoided, thereby effectively maintaining the stability of the link.
  • Fig. 2 is a schematic flowchart of a method for sending a physical random access channel (PRACH) proposed by another embodiment of the present disclosure.
  • PRACH physical random access channel
  • the method for sending a physical random access channel PRACH includes: S201-S203.
  • a physical random access channel refers to an access channel when a terminal device (such as a user equipment UE) initiates a call, and can be formed with an access channel (Random Access Channel, RACH)
  • RACH Random Access Channel
  • the mapping is used to transmit the RACH, that is to say, it can be used to bear the transmission signal from the RACH.
  • the random access preamble is the actual content sent by the UE on the physical random access channel PRACH, which is composed of a signal sequence.
  • the process of sending the random access preamble on the PRACH can be called sending a physical random access preamble The process of accessing the channel PRACH.
  • the listen before talk (LBT) rule means that if a signal is to be sent on the channel, the channel can be monitored, and if the channel shows that it is idle, the signal can be sent on the channel, If the channel fails, that is, if the channel is busy, it may cause the send to fail.
  • executing LBT refers to listening to the channel, successful execution of LBT means that the channel state is idle, and can trigger sending a random access preamble on the PRACH, and failure of LBT execution means that the channel state is busy. Sending the random access preamble on the PRACH may cause sending failure.
  • the LBT failure recovery configuration after listening first refers to the processing strategy set after multiple executions of LBT failures after the LBT failure
  • the LBT failure recovery configuration can be set to use the LBT execution result as the judgment condition , and according to the judgment conditions, instruct the terminal equipment to switch the active uplink subset bandwidth (Bandwidth Part, BWP), that is to say, switch the BWP that sends the random access preamble on the PRACH, stop the ongoing RACH process, and re-initiate the random access preamble
  • BWP active uplink subset bandwidth
  • the process of accessing the RACH channel, the process of re-initiating the RACH can be implemented by high-level processing in the terminal device, and completes processing operations such as parameter initialization for the RACH process.
  • the terminal device when the terminal device is configured to listen first and then talk when the LBT fails to restore the configuration, when the PRACH sends the random access preamble, it can execute LBT to listen to the channel to obtain the execution result of LBT , if the LBT execution is successful, indicating that the channel state is idle, it can trigger the sending of the random access preamble on the PRACH, and the LBT execution fails, indicating that the channel state is busy.
  • the terminal can still send the random access preamble on the PRACH, but it may cause RACH Process failed.
  • the terminal device is configured to restore the configuration if the LBT fails to be configured, then for sending the random access preamble on the PRACH
  • LBT can be performed first, and then the process of sending the random access preamble on the PRACH can be performed, or the process of sending the random access preamble on the PRACH can be performed first, and then the LBT can be performed, which is not limited.
  • the failure to perform LBT means that the channel is in a busy state, and when the random access preamble is sent on the PRACH, it may cause a sending failure.
  • the LBT failure handling process refers to the failure handling strategy for the process of sending the random access preamble on the PRACH after the channel fails to perform LBT.
  • the LBT failure handling process may, for example, include performing random access resource selection procedure, or any other possible failure handling strategy, without limitation.
  • LBT fails to restore the configuration, and when PRACH sends a random access preamble, after executing LBT, the execution result of LBT can be obtained, wherein, LBT The execution result can be success or failure.
  • the successful execution of LBT means that the channel state is idle, which can trigger the sending of random access preamble on PRACH.
  • the failure of LBT execution means that the channel state is busy. At this time, it indicates that if the random access preamble is sent on PRACH , the sending may fail.
  • the indication result of LBT execution failure is received, it indicates that the execution of LBT fails, and the failure processing process of LBT can be executed, and the random access resource selection process can be executed, wherein the execution of the random access resource selection process can be Satisfy certain execution conditions, the execution conditions include receiving the LBT failure indication reported by the physical layer in the terminal device (the LBT failure indication is used to indicate the failure to execute LBT), which is not configured during the process of sending the random access preamble on the PRACH Exempt from listening before speaking LBT, and configured LBT failure recovery configuration, if the execution conditions of the random access resource selection process are met, the random access resource selection process can be performed, and the random access preamble can be sent on the PRACH again.
  • the LBT failure indication is used to indicate the failure to execute LBT
  • exempt from LBT means that when the terminal device sends short control signaling, it can be exempted from executing the LBT rule and directly sent, wherein the short control signaling is characterized by: within a certain sending period (for example, the The sending period can be 100ms) the duty cycle is less than 10%, that is, the sending time is less than 10ms, and the PRACH is configured to be exempted from LBT during the process of sending the random access preamble, which means that the random access preamble is sent on the PRACH In the process, it is configured so that there is no need to perform the LBT process, that is, in the process of sending the random access preamble on the PRACH, it is configured not to monitor the idle or busy state of the physical random access channel, and directly send the random access in the PRACH preamble.
  • the short control signaling is characterized by: within a certain sending period (for example, the The sending period can be 100ms) the duty cycle is less than 10%, that is, the sending time is less than 10ms
  • the PRACH when the PRACH is not configured to be exempt from LBT during the process of sending the random access preamble, it means that when the PRACH sends the random access preamble, the LBT needs to be executed to monitor the channel.
  • whether the PRACH is configured to be exempted from LBT during the process of sending the random access preamble may be determined by the LBT exemption indication, wherein the LBT exemption indication may be sent by the base station, and the base station sends a broadcast message or
  • the radio resource control (Radio Resource Control, RRC) message when configuring the RACH resource, uses the LBT exemption indication to indicate whether the terminal device is exempt from the LBT when sending the PRACH.
  • RRC Radio Resource Control
  • the terminal device does not receive the LBT exemption instruction sent by the base station, that is to say, it is not configured to be exempted from LBT during the process of sending the random access preamble on the PRACH, then the LBT rule is executed, Perform channel sensing on the channel to be sent to determine whether the channel to be sent is idle or busy, so as to obtain the execution result of LBT. If the LBT is executed successfully, send a random access preamble on the PRACH.
  • LBT is executed at the physical layer in the terminal device, and then the physical layer can report the execution result of LBT to a high-level layer in the terminal device, where the high-level layer is the Medium Access Control (MAC) in the terminal device , MAC) layer, after the high layer receives the execution result of LBT, it can trigger subsequent processing logic.
  • MAC Medium Access Control
  • the execution parameters of LBT can be determined, and the execution parameters of LBT can be LBT type and LBT beam direction (the LBT beam direction can be omnidirectional or directional).
  • the LBT type can be type-1 type or type-2 type, wherein, the type-1 type of LBT is also called LBT CAT3, and the random backoff of the fixed contention window of the type-1 sending node, the contention window is long It is fixed.
  • the competition window (Contending Windows, CW) can be an integer (for example, CW can be 3), and the type-1 type can generate a random number N from 0 to CW before executing LBT, and then perform N
  • the idle channel detection of the time slot length the type-2 type of LBT is also called LBT CAT2, and the type-2 type performs a fixed-time idle channel detection at the sending node, that is to say, before sending, it can do a fixed
  • the idle channel monitoring process with a duration of 13 ⁇ s includes 2 energy detection time slots. When the detection results of the two detection time slots are both idle, the execution result state of LBT CAT2 is considered to be idle.
  • the random access preamble can be sent on the PRACH, and after the physical layer in the terminal device executes the LBT , the upper layer in the terminal device can receive the execution result of the LBT.
  • the random access preamble can be sent on the PRACH by sending the random access preamble on the PRACH when no LBT exemption is configured during the process of sending the random access preamble on the PRACH and the execution of the LBT is successful.
  • LBT exemption is not configured during the process, LBT is executed to monitor the channel.
  • the random access preamble is sent on the PRACH, which can effectively guarantee the execution of the process of sending the random access preamble on the PRACH. Coherence, effectively guaranteeing the success rate of sending the random access preamble on the PRACH.
  • LBT when PRACH is configured to be exempt from listening before speaking LBT in the process of sending the random access preamble, LBT is executed, and in the case of failure to execute LBT, the failure processing process of LBT is executed to realize In the process of sending the random access preamble, when it is configured to be exempted from LBT, the LBT failure processing can be effectively performed, which can effectively avoid link abnormalities, thereby effectively maintaining the stability of the link.
  • the random access preamble is sent on the PRACH, so that when the PRACH is not configured to exempt from LBT during the process of sending the random access preamble, execute LBT is used to listen to the channel.
  • the random access preamble is sent on the PRACH, which can effectively ensure the continuity of the process of sending the random access preamble on the PRACH, and effectively ensure that the random access preamble is sent on the PRACH.
  • the transmission success rate of the incoming preamble is not be expired.
  • Fig. 3 is a schematic flowchart of a method for sending a physical random access channel (PRACH) proposed by another embodiment of the present disclosure.
  • PRACH physical random access channel
  • the method for sending a physical random access channel PRACH includes: S301-S302.
  • exempt from LBT means that when the terminal device sends short control signaling, it can be exempted from executing the LBT rule and directly sent, wherein the short control signaling is characterized by: within a certain sending period (for example, the The sending period can be 100ms) the duty cycle is less than 10%, that is, the sending time is less than 10ms, and the PRACH is configured to be exempted from LBT during the process of sending the random access preamble, which means that the random access preamble is sent on the PRACH In the process, it is configured so that there is no need to perform the LBT process, that is, in the process of sending the random access preamble on the PRACH, it is configured not to monitor the idle or busy state of the physical random access channel, and directly send the random access in the PRACH preamble.
  • the short control signaling is characterized by: within a certain sending period (for example, the The sending period can be 100ms) the duty cycle is less than 10%, that is, the sending time is less than 10ms
  • the PRACH when the PRACH is not configured to be exempt from LBT during the process of sending the random access preamble, it means that when the PRACH sends the random access preamble, the LBT needs to be executed to monitor the channel.
  • whether the PRACH is configured to be exempted from LBT during the process of sending the random access preamble may be determined by the LBT exemption indication, wherein the LBT exemption indication may be sent by the base station, and the base station sends a broadcast message or
  • the radio resource control (Radio Resource Control, RRC) message when configuring the RACH resource, uses the LBT exemption indication to indicate whether the terminal device is exempt from the LBT when sending the PRACH.
  • RRC Radio Resource Control
  • the terminal device does not receive the LBT exemption instruction sent by the base station, that is to say, it is not configured to be exempted from LBT during the process of sending the random access preamble on the PRACH, then the LBT rule is executed, Perform channel sensing on the channel to be sent to determine whether the channel to be sent is idle or busy, so as to obtain the execution result of the LBT, and if the LBT is executed successfully, send a random access preamble on the PRACH.
  • LBT is executed at the physical layer in the terminal device, and then the physical layer can report the execution result of LBT to a high-level layer in the terminal device, where the high-level layer is the Medium Access Control (MAC) in the terminal device , MAC) layer, after the high layer receives the execution result of LBT, it can trigger subsequent processing logic.
  • MAC Medium Access Control
  • the execution parameters of LBT can be determined, and the execution parameters of LBT can be LBT type and LBT beam direction (the LBT beam direction can be omnidirectional or directional).
  • the LBT type can be type-1 type or type-2 type, wherein, the type-1 type of LBT is also called LBT CAT3, and the random backoff of the fixed contention window of the type-1 sending node, the contention window is long It is fixed.
  • the competition window (Contending Windows, CW) can be an integer (for example, CW can be 3), and the type-1 type can generate a random number N from 0 to CW before executing LBT, and then perform N
  • the idle channel detection of the time slot length the type-2 type of LBT is also called LBT CAT2, and the type-2 type performs a fixed-time idle channel detection at the sending node, that is to say, before sending, it can do a fixed
  • the idle channel monitoring process with a duration of 13 ⁇ s includes 2 energy detection time slots. When the detection results of the two detection time slots are both idle, the execution result state of LBT CAT2 is considered to be idle.
  • the random access preamble in the process of sending the random access preamble on the PRACH, no LBT exemption is configured, and the LBT execution is successful, the random access preamble can be sent on the PRACH, and executed at the physical layer of the terminal device After the LBT, the upper layer in the terminal device can receive the execution result of the LBT.
  • S302 Execute a random access resource selection process when the LBT failure indication is received.
  • the LBT failure indication refers to a result indication used to characterize the failure of LBT execution, and is used to indicate the failure of LBT execution, and the LBT failure indication may be received by a high layer of the terminal device.
  • the random access resource selection process refers to switching to a new uplink channel and trying to send the random access preamble on the PRACH.
  • LBT can be executed on the physical layer of the terminal device to obtain the execution result of LBT, and convert the execution result of LBT into The LBT execution instruction is reported to the upper layer of the terminal device. If the LBT execution fails, the LBT failure instruction is reported to the upper layer of the terminal device. After the upper layer of the terminal device receives the LBT failure instruction, if the terminal device is configured with LBT failure recovery configuration, then execute During the random access resource selection process, a retry of the RACH process is performed.
  • the random access channel RACH process when performing the random access resource selection process, the random access channel RACH process may be performed, and the user equipment UE sends the random access preamble to the base station on the physical random access channel PRACH, and the base station receives the random access preamble After random access to the preamble, a Random Access Response (Random Access Response, RAR) is sent on the Physical Downlink Shared Channel (PDSCH), and then the UE can send a random access response (RAR) on the Physical Uplink Shared Channel (Physical Uplink Shared Channel) according to the uplink scheduling information. , PUSCH) to send cell wireless network temporary identifier and other information to perform radio resource control (Radio Resource Control, RRC) connection, and the base station sends contention resolution to the UE to determine whether the UE has successfully established a connection with the base station.
  • RAR Random Access Response
  • PUSCH Physical Uplink Shared Channel
  • RRC Radio Resource Control
  • the random access resource selection process when the PRACH is not configured to exempt LBT during the process of sending the random access preamble, and when the LBT failure indication is received, the random access resource selection process is performed, so that after receiving the LBT failure indication, the random access resource selection process is used.
  • the access resource selection process switches the link and executes the process of sending the random access preamble on the PRACH, so that the process of sending the PRACH can be retried when the LBT execution fails.
  • the random access preamble is sent on the PRACH, so that the process of sending the random access preamble on the PRACH can be
  • the LBT exemption is not configured, execute LBT to monitor the channel.
  • the execution of LBT is successful, send the random access preamble on the PRACH, which can effectively guarantee the execution consistency of the process of sending the random access preamble on the PRACH.
  • the random access resource selection process is performed , so that after receiving the LBT failure indication, the random access resource selection process is used to switch links to perform the process of sending the random access preamble on the PRACH, so that the process of sending the PRACH can be retried when the LBT execution fails.
  • Fig. 4 is a schematic flowchart of a method for sending a physical random access channel PRACH proposed by another embodiment of the present disclosure.
  • the method for sending a physical random access channel PRACH includes: S401-S403.
  • LBT fails to restore the configuration, when the PRACH sends a random access preamble, determine the LBT configuration information, wherein the LBT configuration information is determined by the base station, or the LBT configuration information is determined by the terminal device Sure.
  • LBT configuration information refers to parameter information that can be determined before performing LBT.
  • the LBT configuration information can be LBT type information and LBT beam direction information.
  • the LBT configuration information can be determined by the base station, or the LBT configuration information Can be determined by the end device.
  • the base station when the base station determines the LBT configuration information, the base station can configure the LBT type information and beam direction information.
  • the LBT type can be type-1 type or type-2 type, and the LBT beam direction information can be It is an omnidirectional beam direction or a directional beam direction.
  • the base station determines the LBT configuration information, the base station can configure the LBT type information and beam direction information.
  • the LBT type can be set to type-1 type or type-2 type, and set The beam direction information of the LBT is an omnidirectional beam direction or a directional beam direction, so as to obtain LBT configuration information.
  • the base station may configure LBT configuration information as follows:
  • LBT_type_Msg1 is used to instruct the terminal device to send PRACH
  • NUMERATED means enumeration
  • the type of LBT is divided into type-1 type or type-2 type, when NUMERATED indicates type-1 type, when the terminal device sends PRACH, execute type -1 type LBT, when NUMERATED indicates type-2, the terminal device executes type-2 type LBT when sending PRACH.
  • the terminal device when configuring the LBT type information in the LBT configuration information, only one type may be indicated.
  • LBT_type_Msg1 when configured, the terminal device executes according to the type-1 type of LBT.
  • the terminal device executes according to the type-2 type of LBT, or when LBT_type_Msg2 is configured, the terminal device executes according to the type-2 type of LBT, and when it is not configured, the terminal device executes according to the type-1 type of LBT.
  • the configuration of the LBT type information and the configuration of the LBT beam direction information can also be performed by the terminal device, and the terminal device can determine the setting of the LBT configuration information by itself, and use the set information as the LBT configuration information.
  • S402 Execute LBT according to the LBT configuration information.
  • LBT may be performed according to the LBT configuration information.
  • LBT of a corresponding type and beam direction may be performed according to the LBT type information and the LBT beam direction information in the LBT configuration information.
  • the LBT configuration information includes: LBT type, and/or, LBT beam direction, so that the executed LBT can be configured according to the LBT type and LBT beam direction in the LBT configuration information, so that the channel can be monitored
  • LBT type and/or, LBT beam direction
  • the adaptive configuration of the LBT executed at the same time can effectively improve the channel monitoring effect.
  • the LBT beam direction may be an omnidirectional beam direction or may be a directional beam direction.
  • the LBT type can be type-1 type or type-2 type, wherein, the type-1 type of LBT is also called LBT CAT3, and the random backoff of the fixed contention window of the type-1 sending node, the contention window is long It is fixed, for example, the competition window can be an integer (for example, the competition window (Contending Windows, CW) can be 3), type-1 type can generate a random number N from 0 to CW before executing LBT, and then perform The idle channel detection of N time slot length, the type-2 type of LBT is also called LBT CAT2, and the type-2 type performs a fixed-time idle channel detection at the sending node, that is to say, before sending, you can do An idle channel monitoring process with a fixed duration of 13 ⁇ s, the fixed duration includes 2 energy detection time slots, and when the detection results of the two detection time slots are both idle, the execution result state of LBT CAT2 is considered to be idle.
  • the competition window can be an integer (for example, the competition window (Contending Windows, CW) can
  • the LBT of the corresponding type and the corresponding beam direction when executing LBT according to the LBT configuration information, the LBT of the corresponding type and the corresponding beam direction may be invoked and executed according to the LBT type and the LBT beam direction in the LBT configuration information.
  • the LBT configuration information is determined when the PRACH sends the random access preamble when the terminal device is configured to listen first and then talk when the LBT fails to restore the configuration.
  • the LBT configuration information is determined by the base station, or the LBT configuration information is determined by the base station.
  • the information is determined by the terminal device.
  • LBT configuration information LBT is executed, so that the corresponding type of LBT can be executed to listen to the channel according to the LBT configuration information. Since the LBT configuration information can be determined by the base station or by the terminal device, the LBT configuration can be realized.
  • the adaptive configuration of information improves the interception effect of the interception process on the channel.
  • the failure to perform LBT means that the channel state is busy, and at this time it indicates that if the random access preamble is sent on the PRACH, the sending may fail.
  • the LBT failure handling process refers to the failure handling strategy for the process of sending the random access preamble on the PRACH after the channel fails to perform LBT.
  • the LBT failure handling process may, for example, include performing random access resource selection The process, or the failure handling process of the LBT may also be other types of failure handling policies, which are not limited.
  • LBT fails to restore the configuration, and when the PRACH sends a random access preamble, and after executing LBT, the execution result of LBT can be obtained, wherein, The result of LBT execution can be success or failure.
  • the successful execution of LBT means that the channel state is idle, and the random access preamble can be sent on the PRACH. preamble, it may cause sending failure.
  • the indication result of LBT execution failure is received, it indicates that the execution of LBT fails, and the failure processing process of LBT can be executed, and the random access resource selection process can be executed, wherein the execution of the random access resource selection process can be Satisfy certain execution conditions, the execution conditions include receiving the LBT failure indication reported by the physical layer in the terminal device (the LBT failure indication is used to indicate the failure to execute LBT), which is not configured during the process of sending the random access preamble on the PRACH Exempt from listening before speaking LBT, and configured LBT failure recovery configuration, if the execution conditions of the random access resource selection process are met, the random access resource selection process can be performed, and a new uplink channel is switched to try to send random access on the PRACH. Enter the preamble.
  • Figure 5 is a schematic diagram of the LBT failure processing flow in the embodiment of the present disclosure. If the PRACH is configured to be exempt from LBT during the process of sending the random access preamble, the physical layer in the terminal device Execute LBT, and report the execution result of LBT to the upper layer. If the execution of LBT fails, execute the failure handling process of LBT.
  • LBT fails to restore the configuration
  • the PRACH sends the random access preamble
  • LBT is executed
  • the failure processing process of LBT is executed
  • the PRACH is configured to be exempted from LBT during the process of sending the random access preamble
  • the LBT failure process can be effectively performed, which can effectively avoid link abnormalities, thereby effectively maintaining the stability of the link.
  • the LBT type and LBT beam direction in the configuration information configure the LBT to be executed, so that the adaptive configuration of the LBT executed when the channel is monitored can be realized, and the effect of the channel is guaranteed.
  • the terminal device By configuring the terminal device to listen first Afterwards, in the case of LBT failure recovery configuration, when the PRACH sends a random access preamble, determine the LBT configuration information, where the LBT configuration information is determined by the base station, or the LBT configuration information is determined by the terminal device, and execute LBT according to the LBT configuration information. , so that the corresponding type of LBT can be executed to intercept the channel according to the LBT configuration information. Since the LBT configuration information can be determined by the base station or the terminal device, the adaptive configuration of the LBT configuration information can be realized, and the interception process of the channel can be improved. listening effect.
  • Fig. 6 is a schematic flowchart of a method for sending a physical random access channel PRACH proposed by another embodiment of the present disclosure.
  • the method for sending a physical random access channel PRACH includes: S601-S605.
  • S601 Receive an indication message sent by a base station to configure a random access channel RACH or a system broadcast.
  • the indication message of the random access channel RACH is used to determine whether the PRACH is configured to be exempt from LBT in the process of sending the random access preamble, and the indication message of the configuration random access channel RACH can be configured and sent by the base station , or the base station may send an indication message broadcast by other systems, and the terminal device may receive the configuration random access channel RACH or the indication message broadcast by the system sent by the base station.
  • the data transmission interface when receiving the configuration random access channel RACH or the system broadcast instruction message sent by the base station, the data transmission interface may be configured in advance on the device sending the physical random access channel PRACH.
  • the base station configures the random access channel After the RACH indication message, the base station can send the indication message through a broadcast message or an RRC message, or the base station can send an indication message broadcast by other systems, and then the device sending the physical random access channel PRACH can receive the configuration sent by the base station through the data transmission interface An indication message of the random access channel RACH.
  • S602 According to the indication message, determine whether the PRACH is configured to be exempt from LBT during the process of sending the random access preamble.
  • the terminal device after the terminal device receives the indication message sent by the base station to configure the random access channel RACH resources or the system broadcast, it can analyze and process the received indication message, and detect whether the indication message contains configuration information for determining Whether the target field of exempting LBT is configured during the process of sending the random access preamble on the PRACH.
  • the base station can configure the indication message as follows:
  • LBT_exempt_Msg1 is used to indicate whether to configure the target field in the exempt LBT indication message during the process of sending the random access preamble on the PRACH.
  • ENUMERATED indicates enumeration, which is divided into TRUE and FALSE.
  • the terminal device It can be regarded as being configured to be exempt from LBT when sending PRACH, that is, without triggering the execution of LBT, the random access preamble can be sent directly on PRACH.
  • the terminal device When ENUMERATED is FALSE, the terminal device can be regarded as not configured when sending PRACH Exempt from LBT, that is to say, the execution of LBT can be triggered, and only when the execution of LBT is successful, the random access preamble can be sent on the PRACH.
  • the target field in the configuration indication message when receiving an indication message for configuring the random access channel RACH or system broadcast sent by the base station, and determining whether to configure the target field in the indication message, if the target field in the configuration indication message is detected, determine Exemption from LBT is configured during the process of sending the random access preamble on the PRACH, and then LBT can be performed. If the target field in the configuration indication message is not detected, it is determined that the exemption is not configured during the process of sending the random access preamble on the PRACH LBT, which can then be performed.
  • the PRACH by receiving the configuration random access channel RACH or the system broadcast indication message sent by the base station, according to the indication message, it is determined whether the PRACH is configured to be exempted from LBT during the process of sending the random access preamble, so as to realize according to the information sent by the base station.
  • the indication message determines whether the LBT is configured to be exempted during the process of sending the random access preamble on the PRACH, which can effectively improve the accuracy and timeliness of determining whether the LBT is configured to be exempted, and realizes timely triggering of subsequent corresponding processing logic according to the indication message. Effectively avoid link anomalies.
  • the indication message it is determined whether the cell accessed by the terminal device is configured to be exempt from LBT, or, if the indication message is not received, it is determined that the cell accessed by the terminal device is configured to be exempt from LBT, so that according to the indication
  • the message judges whether the cell accessed by the terminal device is configured to be exempt from LBT, that is to say, judges the mode of the cell accessed by the terminal device, and realizes the combination of the LBT mode and the instruction message sending RACH information configuration exemption LBT, Thus, the overhead of indication information is effectively reduced.
  • the base station when the base station sends an indication message for configuring the random access channel RACH or system broadcast, it can indicate whether the cell accessed by the terminal device is configured to be exempt from LBT, that is to say, the cell accessed by the terminal device Indicates the mode of the cell.
  • the mode of the cell accessed by the terminal device is divided into LBT mode and NO-LBT mode.
  • the LBT mode refers to when sending data or signals on the channel (the channel includes PRACH and any other channel/signal information), execute the LBT process, and the NO-LBT mode means that when sending data or signals on the channel, the LBT process is not executed.
  • 1-bit indication information may be used to indicate the LBT mode or the NO-LBT mode.
  • the base station can configure the indication message as follows:
  • ENUMERATED means enumeration, which is divided into TRUE and FALSE.
  • LBT-modeAndMsg1_exempt indicates TRUE, the terminal device can be regarded as being configured to be exempted from LBT when sending PRACH, and the cell accessed by the terminal device is in LBT mode.
  • the terminal device can be regarded as not configured to exempt LBT when sending PRACH, and the cell the terminal device accesses is in LBT mode; when LBT-modeAndMsg1_exempt is not configured or instructed by the base station, that is to say, the terminal device is not receiving If the indication message is received, it is determined that the cell accessed by the terminal device is in the NO-LBT mode, and the cell accessed by the terminal device is configured to be exempt from LBT.
  • the base station may send other system broadcast messages to determine whether the cell accessed by the terminal device is configured to be exempt from LBT, and may check whether the cell accessed by the terminal device is configured to be exempt from LBT in the indication message broadcast by other systems.
  • Indication After receiving the indication message sent by the base station to configure the random access channel RACH or the system broadcast, the terminal device can determine whether it is configured to be exempt from LBT during the process of sending the random access preamble on the PRACH according to the indication message.
  • the geographic location of the terminal device when determining whether an LBT exemption is configured during the process of sending a random access preamble on the PRACH, the geographic location of the terminal device is determined, and if the geographic location belongs to the target location area, it is determined that the random access preamble is sent on the PRACH In the process of the preamble, it is configured to be exempt from LBT.
  • the target location area is the location area that is exempted from LBT during the process of sending the random access preamble on the PRACH.
  • the exemption LBT is not configured, so that the terminal device can determine whether the exemption LBT is configured during the process of sending the random access preamble on the PRACH in combination with its own geographical location, so as to realize the random access sending on the PRACH Flexible determination of whether the preamble is exempt from LBT during configuration.
  • the target location area refers to the location area where the terminal device configured to be exempt from LBT is located during the process of sending the random access preamble on the PRACH.
  • the location processing may be performed first to obtain the geographic location of the terminal device, and then the terminal device may be located within the target location area. If the geographic location of the terminal device belongs to the target location area, it is determined that the PRACH is configured to be exempt from LBT during the process of sending the random access preamble. If the geographic location of the terminal device does not belong to the target location area, Then it is determined that no LBT exemption is configured during the process of sending the random access preamble on the PRACH.
  • the LBT may be executed to monitor the channel.
  • exempt from LBT means that when the terminal device sends short control signaling, it can be exempted from executing the LBT rule and directly sent, wherein the short control signaling is characterized by: within a certain sending period (for example, the The sending period can be 100ms) the duty cycle is less than 10%, that is, the sending time is less than 10ms, and the PRACH is configured to be exempted from LBT during the process of sending the random access preamble, which means that the random access preamble is sent on the PRACH In the process, it is configured so that there is no need to perform the LBT process, that is, in the process of sending the random access preamble on the PRACH, it is configured not to monitor the idle or busy state of the physical random access channel, and directly send the random access in the PRACH preamble.
  • the short control signaling is characterized by: within a certain sending period (for example, the The sending period can be 100ms) the duty cycle is less than 10%, that is, the sending time is less than 10ms
  • the PRACH when the PRACH is not configured to be exempt from LBT during the process of sending the random access preamble, it means that when the PRACH sends the random access preamble, the LBT needs to be executed to monitor the channel.
  • whether the PRACH is configured to be exempted from LBT during the process of sending the random access preamble may be determined by the LBT exemption indication, wherein the LBT exemption indication may be sent by the base station, and the base station sends a broadcast message or
  • the radio resource control (Radio Resource Control, RRC) message when configuring the RACH resource, uses the LBT exemption indication to indicate whether the terminal device is exempt from the LBT when sending the PRACH.
  • RRC Radio Resource Control
  • the terminal device does not receive the LBT exemption instruction sent by the base station, that is to say, it is not configured to be exempted from LBT during the process of sending the random access preamble on the PRACH, then the LBT rule is executed to Perform channel sensing on the channel to be sent to determine whether the channel to be sent is idle or busy, so as to obtain the execution result of LBT. If the execution of LBT is successful, send a random access preamble on the PRACH.
  • LBT is executed at the physical layer in the terminal device, and then the physical layer can report the execution result of LBT to a high-level layer in the terminal device, where the high-level layer is the Medium Access Control (MAC) in the terminal device , MAC) layer, after the high layer receives the execution result of LBT, it can trigger subsequent processing logic.
  • MAC Medium Access Control
  • the execution parameters of LBT can be determined, and the execution parameters of LBT can be LBT type and LBT beam direction (the LBT beam direction can be omnidirectional or directional).
  • the LBT type can be type-1 type or type-2 type, wherein, the type-1 type of LBT is also called LBT CAT3, and the random backoff of the fixed contention window of the type-1 sending node, the contention window is long It is fixed.
  • the competition window (Contending Windows, CW) can be an integer (for example, CW can be 3), and the type-1 type can generate a random number N from 0 to CW before executing LBT, and then perform N
  • the idle channel detection of the time slot length the type-2 type of LBT is also called LBT CAT2, and the type-2 type performs a fixed-time idle channel detection at the sending node, that is to say, before sending, it can do a fixed
  • the idle channel monitoring process with a duration of 13 ⁇ s includes 2 energy detection time slots. When the detection results of the two detection time slots are both idle, the execution result state of LBT CAT2 is considered to be idle.
  • the random access preamble can be sent on the PRACH, and after the physical layer in the terminal device executes the LBT , the upper layer in the terminal device can receive the execution result of the LBT.
  • the failure to perform LBT means that the channel is in a busy state, and when the random access preamble is sent on the PRACH, it may cause a sending failure.
  • the LBT failure handling process refers to the failure handling strategy for the process of sending the random access preamble on the PRACH after the channel fails to perform LBT.
  • the LBT failure handling process may, for example, include performing random access resource selection procedure, or any other possible failure handling strategy, without limitation.
  • LBT fails to restore the configuration, and when PRACH sends a random access preamble, after executing LBT, the execution result of LBT can be obtained, wherein, LBT The execution result can be success or failure.
  • the successful execution of LBT means that the channel state is idle, which can trigger the sending of random access preamble on PRACH.
  • the failure of LBT execution means that the channel state is busy. At this time, it indicates that if the random access preamble is sent on PRACH code, the sending may fail.
  • the indication result of LBT execution failure is received, it indicates that the execution of LBT fails, and the failure processing process of LBT can be executed, and the random access resource selection process can be executed, wherein the execution of the random access resource selection process can be Satisfy certain execution conditions, the execution conditions include receiving the LBT failure indication reported by the physical layer in the terminal device (the LBT failure indication is used to indicate the failure to execute LBT), which is not configured during the process of sending the random access preamble on the PRACH Exempt from listening before speaking LBT, and configuring LBT failure recovery configuration, if the execution conditions of the random access resource selection process are met, the random access resource selection process can be performed, and the random access preamble can be sent on the PRACH again.
  • the LBT failure indication is used to indicate the failure to execute LBT
  • the base station by receiving the indication message sent by the base station to configure the random access channel RACH, according to the indication message, it is determined whether the PRACH is configured to be exempt from LBT in the process of sending the random access preamble, and the determination is realized according to the indication message sent by the base station.
  • the PRACH is configured to be exempted from LBT in the process of sending the random access preamble can effectively improve the accuracy and timeliness of determining whether it is configured to be exempted from LBT, and realize timely triggering of subsequent corresponding processing logic according to the indication message, effectively avoiding
  • LBT fails to restore the configuration
  • the PRACH sends the random access preamble execute LBT
  • the execution of LBT fails, execute the failure processing process of LBT
  • the LBT failure process can be effectively executed, which can effectively avoid link abnormalities, thereby effectively maintaining the stability of the link.
  • the geographic location of the device if the geographic location belongs to the target location area, it is determined that it is configured to be exempt from LBT during the process of sending the random access preamble on the PRACH, where the target location area is the process of sending the random access preamble on the PRACH In the location area exempt from LBT, if the geographic location does not belong to the target location area, it is determined that the process of sending the random access preamble on the PRACH is not configured to be exempt from LBT, so that the terminal device can determine the random access preamble on the PRACH based on its own geographical location. Whether the LBT exemption is configured during the process of accessing the preamble realizes the flexible determination of whether the LBT exemption is configured during the process of sending the random access preamble on the PRACH.
  • Fig. 7 is a schematic flowchart of a method for sending a physical random access channel PRACH proposed by another embodiment of the present disclosure.
  • the method for sending a physical random access channel PRACH includes: S701-S706.
  • the PRACH is configured to be exempt from LBT during the process of sending the random access preamble, and the reference configuration information is the target configuration information, increment the second power ramping count value to obtain the first power ramping count value , the second power ramping count value is the power ramping count value related to the last time the terminal device sent the random access preamble on the PRACH.
  • the first power ramping count value refers to the power counting value when the terminal device sends the PRACH. In the case of other parameters being the same, the greater the value of the first power ramping count value, the more the terminal device sends The greater the power during the PRACH, the smaller the value of the first power ramping count value, and the smaller the transmitted power.
  • the power ramping count value related to the last random access preamble sent by the terminal device on the PRACH refers to the last time the random access preamble was sent on the PRACH corresponding to the current process of sending the random access preamble on the PRACH The related power ramp count value of the code process.
  • the second power ramping count value refers to a power ramping count value related to the last time the terminal device sent the random access preamble on the PRACH.
  • the reference configuration information refers to terminal device configuration information used to determine the first power ramping count value.
  • the target configuration information refers to the judgment condition for whether to increment the second power ramp count value.
  • the reference configuration information is the target configuration information
  • the second power ramp count value can be incremented. processing to obtain the first power ramp count value.
  • the comparison process can be performed in the target configuration information according to the reference configuration information. If the reference configuration information is the target configuration information, it can be set Determine the incremental step, and perform incremental processing on the second power ramp count value according to the incremental step, and use the second power ramp count value after the increment process as the first power ramp count value, wherein the incremental step can be Set it to 1, or you can set any other reasonable value as the incremental step size, there is no limit to this.
  • the target configuration information includes any of the following: the last time the PRACH was configured to be exempt from LBT during the process of sending the random access preamble, and the last time the PRACH was sending the random access preamble, no LBT was received Failure indication, so that the reference configuration information can be checked according to the target configuration information, so as to determine the first power ramp count value according to the target configuration information and the reference configuration information, so that the power of the terminal device to send the random access preamble on the PRACH
  • the count value is adaptively configured.
  • the judgment condition can be preset as the target configuration information
  • the target configuration information can include: the last time the random access preamble was configured to be exempted from LBT in the process of sending the random access preamble on the PRACH, the last time the random access preamble was sent on the PRACH
  • the second power ramping count value is incremented, and the incremented second power ramping count value is used as Get the first power ramp count value.
  • the target configuration information can be used to compare the reference configuration information. If the target configuration information does not include any of the following: the PRACH is configured to be exempt from LBT during the process of sending the random access preamble, the last time When the PRACH is configured to be exempt from LBT during the process of sending the random access preamble, and the last time the PRACH sent the random access preamble, no LBT failure indication was received, then there is no need to increment the second power ramping count value , using the second power ramp-up count value that has not been incremented as the first power ramp-up count value.
  • the comparison process can be performed in the target configuration information according to the reference configuration information. If the reference configuration information is not the target configuration information, the second The second power ramp count value is incremented, and the second power ramp count value is used as the first power ramp count value
  • S703 Determine an indication parameter according to the first power ramp count value.
  • the indication parameter refers to a related power parameter when the terminal device sends the PRACH, and is used to characterize the power of the terminal device when sending the PRACH.
  • the indication parameter is determined according to the first power ramp count value, and the judgment condition can be set in advance.
  • the judgment condition is met, Incrementing the power ramping count value of the PRACH last sent by the terminal device to obtain the incremented power ramping count value as the first power ramping count value, and then according to the first power ramping count value, determine the terminal The relevant power parameters when the device sends PRACH, and use the obtained relevant power parameters when the terminal device sends PRACH as an indication parameter, where the incremental step size during incremental processing can be 1, or can also be set to an incremental value of other values Step size for incremental processing, there is no limit to this.
  • the indication parameter may be determined according to the first power ramping count value.
  • the second power ramping count value is incremented to obtain the first power ramping
  • the count value, the second power ramp count value is the power ramp count value related to the random access preamble sent by the terminal device on the PRACH last time.
  • the indication parameter is determined, so that it can be configured according to the reference Information and target configuration information determine the indication parameters, because the indication parameters are used to indicate the relevant power when the PRACH sends the random access preamble, so that the adaptive configuration of the relevant power can be realized, and the random access preamble is effectively guaranteed to be sent on the PRACH performance of the process.
  • S704 Send a random access preamble on the PRACH according to the indication parameter.
  • the random access preamble may be sent on the PRACH according to the indication parameter.
  • the random access preamble after sending the random access preamble on the PRACH according to the indication parameter, the random access preamble may be sent on the PRACH according to the power of the terminal device indicated by the indication parameter when sending the PRACH.
  • the PRACH is configured to be exempt from LBT during the process of sending the random access preamble
  • the PRACH sends the random access preamble
  • the random access preamble is sent by referring to the indication parameter, and at this time, it is not necessary to refer to The execution result of LBT.
  • the physical layer in the terminal device can perform LBT.
  • the PRACH when the PRACH sends the random access preamble, it is a reference indication parameter Complete the transmission of the random access preamble without referring to the execution result of LBT.
  • the execution result of LBT is used to trigger the failure process of LBT. If the PRACH is configured to exempt LBT during the process of sending the random access preamble, and refer to the If the information is not the target configuration information, the second power ramping count value is used as the first power ramping count value.
  • the execution result of the LBT can be obtained, and the execution result of the LBT can be reported to the upper layer of the terminal device. If the execution of the LBT fails, the failed execution result of the LBT can be uploaded. To the upper layer of the terminal device, the upper layer of the terminal device executes the failure handling process of the LBT.
  • the execution result of the LBT is only used to trigger the failure processing process of the LBT, and the execution result of the LBT may not be used as the process of sending the random access preamble on the PRACH. Reference to the process of entering the preamble.
  • the terminal device when the terminal device is configured to listen first and then talk, when the LBT fails to restore the configuration, when the PRACH sends the random access preamble, the LBT is executed, and when the execution of the LBT fails, the LBT failure processing process is executed, so that the PRACH In the process of sending the random access preamble, when it is configured to be exempt from LBT, it can effectively execute LBT failure processing, which can effectively avoid link abnormalities, thereby effectively maintaining the stability of the link.
  • the target configuration information reference The configuration information is checked to determine the first power ramping count value according to the target configuration information and the reference configuration information, so that the power count value for sending the random access preamble by the terminal device on the PRACH can be adaptively configured.
  • Fig. 8 is a schematic flowchart of a method for sending a physical random access channel PRACH proposed by another embodiment of the present disclosure.
  • the method for sending a physical random access channel PRACH includes: S801-S805.
  • the first power ramping count value determines the power parameter for sending the PRACH.
  • S802 Send the power parameter of the PRACH as an indication parameter.
  • the power parameter for sending the PRACH may be used as an indication parameter.
  • the random access preamble after sending the power parameter of the PRACH as the indication parameter, the random access preamble may be sent on the PRACH according to the indication parameter.
  • the power parameter for sending the PRACH is determined according to the first power ramp count value, and the power parameter for sending the PRACH is used as an indication parameter , so that the power parameter for sending the PRACH can be determined as an indication parameter according to the first power ramp count value, so as to realize the acquisition of the sending power when the PRACH sends the random access preamble, and ensure the process of sending the random access preamble on the PRACH. Effective execution.
  • the random access preamble after sending the power parameter of the PRACH as the indication parameter, if the LBT exemption is configured during the process of sending the random access preamble on the PRACH, the random access preamble can be sent on the PRACH according to the indication parameter, In this way, the random access preamble can be sent on the PRACH according to the corresponding power parameter in the indication parameter.
  • the process of sending the random access preamble on the PRACH can refer to the indication parameter instead of the execution result of the LBT, thereby effectively ensuring that the PRACH
  • the LBT exemption is configured in the process of sending the random access preamble, the process can be effectively and timely executed, and has a relatively reliable execution effect.
  • the LBT is executed in the physical layer of the terminal device.
  • the execution result of the LBT can be obtained, and the execution result of the LBT can be reported to the upper layer of the terminal device. If the execution of the LBT fails, the failed execution result of the LBT can be uploaded. To the upper layer of the terminal device, the upper layer of the terminal device executes the failure handling process of the LBT.
  • LBT fails to restore the configuration
  • the PRACH sends the random access preamble
  • LBT is executed
  • the failure processing process of LBT is executed
  • the PRACH is configured to be exempted from LBT during the process of sending the random access preamble
  • the LBT failure process can be effectively executed, which can effectively avoid link abnormalities, thereby effectively maintaining the stability of the link.
  • the power parameter for sending the PRACH is determined according to the first power ramp count value, and the power parameter for sending the PRACH is used as an indication parameter, so that the first power
  • the ramp count value determines the power parameter for sending the PRACH as an indication parameter, realizes the acquisition of the sending power when sending the random access preamble on the PRACH, and ensures the effective execution of the process of sending the random access preamble on the PRACH. It can also be realized that the random access preamble is sent on the PRACH according to the corresponding power parameter in the indication parameter.
  • the process of sending the random access preamble on the PRACH can refer to the indication parameter instead of the execution result of the LBT, thereby effectively ensuring that the PRACH
  • the process can be effectively and timely executed, and has a relatively reliable execution effect.
  • Fig. 9 is a schematic structural diagram of an apparatus for sending a physical random access channel (PRACH) proposed by an embodiment of the present disclosure.
  • PRACH physical random access channel
  • the device 80 for sending the physical random access channel PRACH includes:
  • the first execution unit 901 is configured to execute LBT when the PRACH sends a random access preamble when the terminal device is configured to listen before speaking and LBT fails to restore the configuration;
  • the second execution unit 902 is configured to execute a failure handling process of the LBT in the case of failure to execute the LBT.
  • FIG. 10 is a schematic structural diagram of an apparatus for sending a physical random access channel PRACH proposed in another embodiment of the present disclosure, and further includes:
  • the first sending unit 903 is configured to send the random access preamble on the PRACH according to the indication parameter in the case that LBT exemption is configured during the process of sending the random access preamble on the PRACH.
  • the second sending unit 904 is configured to send the random access preamble on the PRACH when no LBT exemption is configured during the process of sending the random access preamble on the PRACH and the execution of the LBT is successful.
  • the first determining unit 905 is configured to determine the indication parameter according to the first power ramping count value when the PRACH is configured to be exempt from LBT during the process of sending the random access preamble;
  • the second power ramping count value is incremented to obtain the first power ramping count value, and the second power ramping count value is the last power ramping count value of the terminal device.
  • the PRACH sends the power ramping count value related to the random access preamble.
  • the processing unit 906 is configured to use the second power ramping count value as the first power ramping count value when the reference configuration information is not the target configuration information.
  • the target configuration information includes any of the following:
  • the first determining unit 905 is specifically configured to:
  • the power parameter for sending the PRACH is used as an indication parameter.
  • the third execution unit 907 is configured to execute a random access resource selection process when the LBT failure indication is received.
  • the receiving unit 908 is configured to receive an instruction message for configuring a random access channel RACH or system broadcast sent by the base station;
  • the second determining unit 909 is configured to determine whether LBT exemption is configured during the process of sending the random access preamble on the PRACH according to the indication message.
  • the third determining unit 910 is configured to determine whether the cell accessed by the terminal device is configured to be exempt from LBT according to the indication message; or,
  • the fourth determining unit 911 is configured to determine that the cell accessed by the terminal device is configured to be exempt from LBT if the indication message is not received.
  • the fifth determining unit 912 is configured to determine the geographic location of the terminal device
  • the sixth determining unit 913 is configured to determine that LBT is configured to be exempted from the LBT during the process of sending the random access preamble on the PRACH when the geographic location belongs to the target location area, wherein the target location area is when the random access preamble is sent on the PRACH Location areas exempt from LBT during the coding process;
  • the seventh determining unit 914 is configured to determine that no exempt LBT is configured during the process of sending the random access preamble on the PRACH when the geographic location does not belong to the target location area.
  • the first execution unit 901 is specifically configured to:
  • LBT configuration information where the LBT configuration information is determined by the base station, or the LBT configuration information is determined by the terminal device;
  • the LBT configuration information includes: LBT type, and/or, LBT beam direction.
  • each functional unit in each embodiment of the present disclosure may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit.
  • the above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.
  • An integrated unit may be stored in a processor-readable storage medium if it is realized in the form of a software function unit and sold or used as an independent product.
  • the technical solution of the present disclosure is essentially or part of the contribution to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , including several instructions for enabling a computer device (which may be a personal computer, server, or network device, etc.) or a processor (processor) to execute all or part of the steps of the methods in various embodiments of the present disclosure.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disc and other media that can store program codes. .
  • LBT fails to restore the configuration
  • the PRACH sends a random access preamble
  • LBT is executed
  • the execution of LBT fails
  • the failure of LBT is executed
  • the processing process realizes that when the PRACH is configured to be exempt from the LBT in the process of sending the random access preamble, the LBT failure processing can be effectively performed, and the link abnormality can be effectively avoided, thereby effectively maintaining the stability of the link.
  • Fig. 11 is a schematic structural diagram of an apparatus for sending a physical random access channel (PRACH) proposed by another embodiment of the present disclosure.
  • PRACH physical random access channel
  • the device 110 for sending the physical random access channel PRACH includes a memory 1101, a transceiver 1102, a processor 1103 and a user interface 1104: the memory 1101 is used to store computer programs; the transceiver 1102 is used to operate on the processor Send and receive data under the control of 1103; processor 1103 is used to read the computer program in memory 1101 and perform the following operations:
  • the terminal device is configured to listen first and then talk after the LBT fails to restore the configuration, when the PRACH sends the random access preamble, execute the LBT;
  • the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors represented by the processor 1103 and various circuits of the memory represented by the memory 1101 are linked together.
  • the bus architecture can also link together various other circuits such as peripherals, voltage regulators, and power management circuits, etc., which are well known in the art and therefore will not be further described herein.
  • the bus interface provides the interface.
  • Transceiver 1102 may be a plurality of elements, including a transmitter and a receiver, providing means for communicating with various other devices over transmission media, including wireless channels, wired channels, fiber optic cables, etc. Transmission medium.
  • the user interface 1104 may also be an interface capable of connecting externally and internally to required equipment, and the connected equipment includes but not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.
  • the processor 1103 is responsible for managing the bus architecture and general processing, and the memory 1101 can store data used by the processor 1103 when performing operations.
  • the processor 1103 can be a CPU (Central Processing Unit), ASIC (Application Specific Integrated Circuit, Application Specific Integrated Circuit), FPGA (Field-Programmable Gate Array, Field Programmable Gate Array) or CPLD (Complex Programmable Logic Device, complex programmable logic device), the processor can also adopt a multi-core architecture.
  • CPU Central Processing Unit
  • ASIC Application Specific Integrated Circuit
  • FPGA Field-Programmable Gate Array
  • CPLD Complex Programmable Logic Device, complex programmable logic device
  • the processor can also adopt a multi-core architecture.
  • the processor is used to execute any method provided by the embodiments of the present disclosure according to the obtained executable instructions by calling the computer program stored in the memory.
  • the processor and memory may also be physically separated.
  • the processor 1103 is specifically configured to:
  • the random access preamble is sent on the PRACH according to the indication parameter.
  • the processor 1103 is specifically configured to:
  • the random access preamble is sent on the PRACH.
  • the processor 1103 is specifically configured to:
  • the PRACH is configured to be exempt from LBT during the process of sending the random access preamble, determine the indication parameter according to the first power ramping count value;
  • the second power ramping count value is incremented to obtain the first power ramping count value, and the second power ramping count value is the last power ramping count value of the terminal device.
  • the PRACH sends the power ramping count value related to the random access preamble.
  • the processor 1103 is specifically configured to:
  • the second power ramp-up count value is used as the first power ramp-up count value.
  • the target configuration information includes any of the following:
  • the processor 1103 is specifically configured to:
  • the power parameter for sending the PRACH is used as an indication parameter.
  • the processor 1103 is specifically configured to:
  • the processor 1103 is specifically configured to:
  • the indication message it is determined whether the PRACH is configured to be exempt from LBT during the process of sending the random access preamble.
  • the processor 1103 is specifically configured to:
  • the indication message determine whether the cell accessed by the terminal device is configured to be exempt from LBT; or,
  • the indication message is not received, it is determined that the cell accessed by the terminal device is configured to be exempt from LBT.
  • the processor 1103 is specifically configured to:
  • the geographic location belongs to the target location area
  • the PRACH is configured to be exempt from LBT during the process of sending the random access preamble
  • the target location area is the location area that is exempt from LBT during the process of sending the random access preamble on the PRACH ;
  • the geographic location does not belong to the target location area, it is determined that no LBT exemption is configured during the process of sending the random access preamble on the PRACH.
  • the processor 1103 is specifically configured to:
  • LBT configuration information where the LBT configuration information is determined by the base station, or the LBT configuration information is determined by the terminal device;
  • the LBT configuration information includes: LBT type, and/or, LBT beam direction.
  • the embodiments of the present disclosure provide a processor-readable storage medium, the processor-readable storage medium stores a computer program, and the computer program is used to enable the processor to execute sending physical random access The method of entering the channel PRACH.
  • the processor-readable storage medium is a non-transitory processor-readable storage medium.
  • the embodiments of the present disclosure provide a computer program product, including a computer program.
  • the computer program is executed by a processor, the method for sending the physical random access channel PRACH as proposed in the foregoing embodiments of the present disclosure is implemented.
  • An embodiment of the present disclosure also proposes a computer program, wherein the computer program includes computer program code, and when the computer program code is run on the computer, the computer executes the method of sending the physical random access channel PRACH as proposed in the foregoing embodiments of the present disclosure. method.
  • the embodiments of the present disclosure may be provided as methods, systems, or computer program products. Accordingly, the present disclosure can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present disclosure may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, optical storage, etc.) having computer-usable program code embodied therein.
  • processor-executable instructions may also be stored in a processor-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, such that the instructions stored in the processor-readable memory produce a manufacturing product, the instruction device realizes the functions specified in one or more procedures of the flow chart and/or one or more blocks of the block diagram.
  • processor-executable instructions can also be loaded onto a computer or other programmable data processing device, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented
  • the executed instructions provide steps for implementing the functions specified in the procedure or procedures of the flowchart and/or the block or blocks of the block diagrams.
  • various parts of the present disclosure may be implemented in hardware, software, firmware or a combination thereof.
  • various steps or methods may be implemented by software or firmware stored in memory and executed by a suitable instruction execution system.
  • a suitable instruction execution system For example, if implemented in hardware, as in another embodiment, it can be implemented by any one or combination of the following techniques known in the art: Discrete logic circuits, ASICs with suitable combinational logic gates, programmable gate arrays (PGAs), field programmable gate arrays (FPGAs), etc.
  • each functional unit in each embodiment of the present disclosure may be integrated into one processing module, each unit may exist separately physically, or two or more units may be integrated into one module.
  • the above-mentioned integrated modules can be implemented in the form of hardware or in the form of software function modules. If the integrated modules are realized in the form of software function modules and sold or used as independent products, they can also be stored in a computer-readable storage medium.
  • the storage medium mentioned above may be a read-only memory, a magnetic disk or an optical disk, and the like.

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

L'invention concerne un procédé et un appareil d'envoi d'un canal d'accès aléatoire physique (PRACH), et un support d'enregistrement. Le procédé consiste à : lorsqu'un dispositif terminal est configuré avec une configuration de reprise après défaillance d'écoute avant de parler (LBT), exécuter une LBT lorsqu'un PRACH envoie un préambule d'accès aléatoire ; et exécuter un processus de traitement de défaillance de LBT dans le cas d'une défaillance d'exécution de LBT.
PCT/CN2022/138073 2022-01-10 2022-12-09 Procédé et appareil d'envoi de canal d'accès aléatoire physique (prach), et support d'enregistrement WO2023130903A1 (fr)

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CN202210126392.0A CN116471704A (zh) 2022-01-10 2022-02-10 发送物理随机接入信道prach的方法、装置及存储介质

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CN110972327A (zh) * 2018-09-28 2020-04-07 维沃移动通信有限公司 基于非授权频段的信号传输方法和通信设备
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