WO2020020139A1 - 无线接入方式切换方法、基站、终端和可读存储介质 - Google Patents

无线接入方式切换方法、基站、终端和可读存储介质 Download PDF

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WO2020020139A1
WO2020020139A1 PCT/CN2019/097252 CN2019097252W WO2020020139A1 WO 2020020139 A1 WO2020020139 A1 WO 2020020139A1 CN 2019097252 W CN2019097252 W CN 2019097252W WO 2020020139 A1 WO2020020139 A1 WO 2020020139A1
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Prior art keywords
base station
terminal
side base
target
handover
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PCT/CN2019/097252
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English (en)
French (fr)
Inventor
熊智耀
谢峰
许传奇
张燕
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南京中兴新软件有限责任公司
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Publication of WO2020020139A1 publication Critical patent/WO2020020139A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0027—Control or signalling for completing the hand-off for data sessions of end-to-end connection for a plurality of data sessions of end-to-end connections, e.g. multi-call or multi-bearer end-to-end data connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/34—Reselection control
    • H04W36/36—Reselection control by user or terminal equipment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/02—Selection of wireless resources by user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information
    • H04W74/006—Transmission of channel access control information in the downlink, i.e. towards the terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/0278—Traffic management, e.g. flow control or congestion control using buffer status reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/04—Interfaces between hierarchically different network devices
    • H04W92/10—Interfaces between hierarchically different network devices between terminal device and access point, i.e. wireless air interface

Definitions

  • the present application relates to the field of wireless communication technologies, for example, to a method for switching between wireless access modes, a base station, a terminal, and a readable storage medium.
  • a handover delay will occur, and the handover delay will have a greater impact on service quality and system network performance. Reducing the service interruption time during the handover process has become the main technical means to reduce the handover delay.
  • 3GPP 3rd Generation Partnership Project
  • the first is a random access channel (RACH-Less, RACH-Less) switching method.
  • the RACH-Less handover method requires the source-side base station to issue a handover command to the UE, and also requires the UE to respond to the target-side base station with a handover completion message.
  • the source-side base station sends a reconfiguration message (RRC Reconfiguration) to the UE through radio resource control (RRC) signaling, and the UE reports to the target-side base station through RRC signaling.
  • RRC Reconfiguration Complete message ReconfigurationComplete
  • the RACH-Less handover method needs to maintain synchronization between the source-side base station and the target-side base station, thereby saving time for the UE to randomly access the target-side base station.
  • using the RACH-Less handover method can reduce the handover delay of 10-12ms, greatly reduce the handover interruption time, and improve the user experience.
  • the second is a seamless handover method.
  • the UE maintains the connection with the source-side base station, and does not release the connection with the source-side base station until the UE completes the uplink and downlink synchronization to the target-side base station.
  • This can implement the handover process. No business data was interrupted. Taking LTE as an example, the UE releases the connection with the source-side base station after sending a handover completion message to the target-side base station.
  • 3GPP only proposes the RACH-Less handover method, and does not specify the flow and implementation scheme of the RACH-Less handover method, nor does it specify the exception handling after a RACH-Less handover failure. There is no exception handling, which will affect the user experience.
  • the embodiments of the present application provide a method for switching between wireless access modes, a base station, a terminal, and a readable storage medium, and solves the problem that the connection between the UE and the base station is interrupted without abnormal processing of the RACH-Less switching mode.
  • An embodiment of the present application provides a wireless access mode switching method, which is applied to a base station.
  • the method includes:
  • the air interface signaling is sent to the terminal; wherein the air interface signaling is used to indicate that the terminal has successfully switched.
  • An embodiment of the present application provides a wireless access mode switching method, which is applied to a terminal, and the method includes:
  • RACH Random Access Channel
  • An embodiment of the present application provides a wireless access mode switching method, which is applied to a base station.
  • the method includes:
  • An embodiment of the present application provides a wireless access mode switching method, which is applied to a terminal, and the method includes:
  • An embodiment of the present application provides a base station.
  • the base station includes a memory, a processor, and a computer program stored on the memory and executable on the processor.
  • the computer program is implemented when the processor is executed by the processor.
  • the wireless access switching method described above is applied to a base station.
  • An embodiment of the present application provides a terminal.
  • the terminal includes: a memory, a processor, and a computer program stored on the memory and executable on the processor.
  • the computer program is executed by the processor, The above-mentioned wireless access switching method applied to a terminal is implemented.
  • An embodiment of the present application provides a computer-readable storage medium.
  • the computer-readable storage medium stores one or more programs, and the one or more programs can be executed by one or more processors to implement the application as described above. Steps of a radio access switching method of a base station; and / or steps of implementing a radio access switching method applied to a terminal as described above.
  • FIG. 1 is a flowchart of a RACH-Less handover between a terminal and a base station according to an embodiment of the present application
  • FIG. 2 is a flow block diagram of a wireless access switching method according to an embodiment of the present application.
  • FIG. 3 is a flowchart of another wireless access switching method according to an embodiment of the present application.
  • FIG. 4 is a flowchart of a terminal detecting that a RACH-Less handover procedure is successful according to an embodiment of the present application
  • FIG. 5 is a flowchart of a terminal detecting a failure of a RACH-Less handover procedure according to an embodiment of the present application
  • FIG. 6 is a flow block diagram of another wireless access switching method according to an embodiment of the present application.
  • FIG. 7 is a flowchart of a base station detecting that a RACH-Less handover procedure is successful according to an embodiment of the present application
  • FIG. 8 is a flowchart of a base station detecting a failure of a RACH-Less handover procedure according to an embodiment of the present application
  • FIG. 9 is a structural block diagram of a wireless access switching device applied to a base station according to an embodiment of the present application.
  • FIG. 10 is a structural block diagram of a wireless access switching device applied to a terminal according to an embodiment of the present application
  • FIG. 11 is a structural diagram of a base station and a terminal according to an embodiment of the present application.
  • FIG. 12 is a schematic diagram of a hardware structure of a terminal according to an embodiment of the present application.
  • the terminal can be implemented in various forms.
  • the terminals described in this application may include, for example, a set-top box, a mobile terminal, a smart phone, a notebook computer, a digital broadcast receiver, a (Personal Digital Assistant (PDA), a Tablet PC (Portable Android Device, PAD), portable Multimedia terminals (Portable Media Player, PMP), terminals such as navigation devices, and fixed terminals such as digital televisions (TVs), desktop computers, etc.
  • PDA Personal Digital Assistant
  • PMP portable Multimedia terminals
  • TVs digital televisions
  • TVs digital televisions
  • TVs digital televisions
  • the terminal is a mobile terminal.
  • the embodiment of the present application can also be applied to a terminal of a fixed type.
  • the terminal UE initiates a RACH-Less process between the source-side base station and the target-side base station.
  • the source-side base station sends a measurement configuration message (RRC reconfiguration) to the terminal UE.
  • the measurement configuration message (RRC reconfiguration) issued by the base station performs related measurement, and reports the measurement result to the source-side base station.
  • RRC Reconfiguration RRC Reconfiguration message
  • the source-side base station sends an RRC Reconfiguration message (RRC Reconfiguration) to the terminal UE, that is, handover signaling; when the terminal UE completes the reconfiguration, it sends an RRC reconfiguration to the target-side base station.
  • the completion message (RRCReconfigurationComplete) is the handover completion signaling to complete the RACH-Less process.
  • the completion message (RRCReconfigurationComplete) is the handover completion signaling to complete the RACH-Less process.
  • the RACH-Less process fails, the UE connection is interrupted. After the UE detects that the connection to the base station is interrupted, it initiates the RACH process and establishes a new one with the target base station. Connection, air interface signaling and internal base station signaling will increase significantly, occupying more air interface resources.
  • an embodiment of the present application provides a wireless access mode switching method, which is applied to a base station.
  • the method includes:
  • the source-side base station when the source-side base station determines that a base station handover is required based on the measurement results, the source-side base station sends an RRC Reconfiguration message (RRC Reconfiguration) to the terminal UE, that is, the handover signaling; when the terminal UE completes the reconfiguration, it sends the target
  • RRC Reconfiguration RRC Reconfiguration
  • RRCReconfigurationComplete RRC Reconfiguration Complete message
  • the target base station sends an air interface signaling to the terminal, such as RRCReconfiguration; within a preset time node, if the terminal does not receive the air interface signaling sent by the target base station, the terminal determines that the RACH-Less process fails, and the terminal immediately
  • the target-side base station initiates a RACH procedure.
  • the terminal will re-initiate a complete access process when the terminal goes offline, and the air interface signaling and the internal signaling of the base station will increase a lot and occupy more air interface resources.
  • an embodiment of the present application provides a wireless access switching method, which is applied to a terminal.
  • the method includes the following steps:
  • the source-side base station sends a measurement configuration message (RRC reconfiguration) to the terminal UE, and the terminal UE performs related measurement according to the measurement configuration message (RRC reconfiguration) issued by the source-side base station. And report the measurement result to the source-side base station.
  • RRC reconfiguration measurement configuration message
  • the source-side base station determines that a base station handover is required according to the measurement result, it initiates a RACH-Less process.
  • the source-side base station sends an RRC reconfiguration message (RRCReconfiguration) to the terminal UE, which is the handover signaling.
  • the terminal When the terminal UE completes the reconfiguration, the terminal sends an RRC reconfiguration complete message (RRCReconfigurationComplete) to the target base station, that is, the handover completion message. make.
  • the target base station After receiving the handover completion signaling, the target base station feeds back an air interface signaling to the terminal, such as RRCReconfiguration; the terminal receives the air interface signaling sent by the target base station within a certain time node, indicating that the RACH-Less process is successful.
  • the terminal considers the RACH-Less process to fail , The terminal immediately initiates a RACH procedure to the target-side base station.
  • An embodiment of the present application provides a method for switching a wireless access mode, which is applied to a base station.
  • the method includes: after receiving a handover completion signaling sent by a terminal or a buffer status report BSR sent by the terminal, The terminal sends downlink control information DCI0.
  • the terminal initiates the RACH-Less process, and the target base station receives the RRC Reconfiguration Complete message (RRC Reconfiguration Complete) sent by the terminal, that is, the handover completion signaling. Confirm whether the connection with the target base station is successful.
  • the terminal After sending the handover completion command, the terminal will send the buffer status report BSR to the target base station again. If the target base station receives the handover completion command or the buffer status report BSR, the target base station will The downlink control information DCI0 is fed back to the terminal UE. After receiving the DCI0, the terminal considers that the RACH-Less handover is successful, and the terminal does not need to initiate a RACH process to the target base station.
  • the terminal does not receive the downlink control information DCI0 within a certain time node. At this time, the UE will consider that the RACH-Less handover procedure fails, and will initiate a RACH procedure to ensure that the terminal UE accesses the target-side base station.
  • an embodiment of the present application proposes a wireless access switching method, which is applied to a terminal.
  • the method includes the following steps:
  • the source-side base station sends a measurement configuration message (RRC reconfiguration) to the terminal UE, and the terminal UE performs related measurement according to the measurement configuration message (RRC reconfiguration) issued by the source-side base station. And report the measurement result to the source-side base station.
  • RRC reconfiguration measurement configuration message
  • the source-side base station determines that a base station handover is required according to the measurement result, it initiates a RACH-Less process.
  • the source-side base station sends an RRC reconfiguration message (RRCReconfiguration) to the terminal UE, which is the handover signaling.
  • the terminal UE When the terminal UE completes the reconfiguration, the terminal sends an RRC reconfiguration complete message (RRCReconfigurationComplete) to the target base station, that is, the handover completion message. make. At the same time, in order to further confirm whether the target UE successfully connects to the target base station, the terminal UE sends a buffer status report BSR to the target base station. If the target base station successfully receives the RRCReconfigurationComplete message at this time, the target base station will feedback the downlink control information DCI0. To the terminal UE, after receiving the DCI0, the terminal considers that the RACH-Less handover is successful, and the terminal does not need to initiate a RACH procedure to the target base station.
  • RRC reconfiguration Complete RRCReconfigurationComplete
  • the terminal If the target base station does not receive the RRCReconfigurationComplete message at this time, the terminal also sends a BSR to the target side base station, but because the target side base station does not receive the RRCReconfigurationComplete message, the terminal cannot receive the downlink control information DCI0. At this time, the UE considers RACH-Less The handover procedure fails, and the terminal will initiate a RACH procedure to ensure that the terminal UE accesses the target-side base station. This embodiment enables the terminal UE to use the RACH-Less handover procedure to save the interruption delay of the handover, and avoids the connection interruption when the RACH-Less handover procedure is abnormal, improves user perception, and guarantees network quality.
  • an embodiment of the present application provides a wireless access switching device 30 applied to a base station.
  • the device 30 includes: a signaling interaction communication module 310 configured to establish a connection with a terminal and receive a feedback message from the terminal.
  • a connection switching module 320 configured to trigger the terminal to initiate a RACH procedure when receiving a message that the terminal fails to receive air interface RRC signaling.
  • an embodiment of the present application provides a wireless access switching device 40, which is applied to a terminal.
  • the device 40 includes: a signaling interaction communication module 410, configured to establish a connection with a base station, and send a feedback message to the base station.
  • the connection handover execution module 420 is configured to initiate a RACH procedure to the target-side base station when the downlink control information DCI0 sent by the target-side base station is not received.
  • An embodiment of the present application provides a base station 100.
  • the base station 100 includes a memory, a processor, and a computer program stored on the memory and executable on the processor.
  • the computer program is executed by the processor.
  • the above-mentioned wireless access switching method applied to a base station is implemented at times.
  • the base station 100 integrates an RRC signaling processing unit 110, and is configured to send an air interface RRC message to the terminal after receiving the RRC signaling of the reconfiguration complete message sent by the terminal.
  • the connection switching module 120 is configured to trigger the terminal to initiate a RACH process upon receiving a message that the terminal fails to receive the air interface RRC signaling.
  • the terminal 200 includes: a memory, a processor, and a computer program stored on the memory and executable on the processor.
  • the terminal 200 is provided with a RACH-Less flow detection unit 210 configured to send a buffer to the target-side base station after sending RRC signaling of a reconfiguration complete message to the target-side base station.
  • the zone status report BSR; the connection switching execution module 220 is configured to initiate a RACH process to the target-side base station when the downlink control information DCI0 sent by the target-side base station is not received.
  • FIG. 12 is a schematic diagram of a hardware structure of a terminal that implements any embodiment of the present application.
  • the terminal 200 may include a radio frequency (RF) unit 201 and a wireless fidelity (Wireless) Fidelity (WiFi) module 202, audio output unit 203, audio / video (Audio / Video, A / V) input unit 204, sensor 205, display unit 206, user input unit 207, interface unit 208, memory 209, processor 2010 And power supply 211 and other components.
  • RF radio frequency
  • WiFi wireless fidelity
  • audio output unit 203 audio / video (Audio / Video, A / V) input unit 204
  • sensor 205 sensor
  • display unit 206 user input unit 207
  • interface unit 208 memory 209
  • processor 2010 And power supply 211 and other components.
  • the structure of the terminal shown in FIG. 12 does not constitute a limitation on the terminal.
  • the terminal may include more or fewer components than shown, or some components may be combined,
  • the memory 209 may be configured to store software programs and various data.
  • the memory 209 may mainly include a storage program area and a storage data area.
  • the storage program area may store an operating system and at least one application required by a function (such as a sound playback function, an image playback function, etc.); the storage data area may be Stores data (such as audio data, phone book, etc.) created based on the use of the phone.
  • the memory 209 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other volatile solid-state storage devices.
  • the processor 2010 is a control center of the terminal, and uses various interfaces and lines to connect multiple parts of the entire terminal. By running or executing software programs and / or modules stored in the memory 209, and calling data stored in the memory 209, Perform various functions of the terminal and process data to monitor the terminal as a whole.
  • the processor 2010 may include one or more processing units.
  • the wireless access handover method applied to the terminal is implemented: after sending the RRC signaling of the reconfiguration complete message to the target side base station, the target side base station Sending a buffer area status report BSR; if the downlink control information DCI0 sent by the target-side base station is not received, the RACH process is initiated to the target-side base station.
  • An embodiment of the present application provides a computer-readable storage medium, where the computer-readable storage medium stores one or more programs, and the one or more programs can be executed by one or more processors to implement the foregoing.
  • the wireless access mode switching method, base station, terminal, and readable storage medium add a RACH-Less handover successful detection mechanism to the terminal UE or the target side base station (next generation NodeB (gNB)), After the system finds that the RACH-Less handover fails, the UE initiates the RACH process to the target base station in a timely manner to prevent the UE from being disconnected and improve the quality of the wireless network.
  • gNB target side base station
  • the terms “including”, “including” or any other variation of the terms “including” and “including” are intended to encompass non-exclusive inclusion, such that a process, method, article, or device that includes a series of elements includes not only This series of elements, but also includes other elements not listed, or also includes elements inherent to the process, method, article or device. Without limitation, an element limited by the sentence “including a " does not exclude that there are other identical elements in the process, method, article, or device that includes the element.

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Abstract

本文公开了一种无线接入方式切换方法、基站、终端和可读存储介质，所述方法包括：在接收到源侧基站发送的切换信令之后，向目标侧基站发送切换完成信令；在未接收到所述目标侧基站发送的空口信令的情况下，向所述目标侧基站发起随机接入信道RACH流程。

Description

无线接入方式切换方法、基站、终端和可读存储介质
本申请要求在2018年07月23日提交中国专利局、申请号为201810818346.0的中国专利申请的优先权，该申请的全部内容通过引用结合在本申请中。
技术领域
本申请涉及无线通信技术领域，例如涉及一种无线接入方式切换方法、基站、终端和可读存储介质。
背景技术
在终端(User Equipment，UE)从与源侧基站连接切换至与目标侧基站连接的切换过程中，会产生切换时延，切换时延对于业务质量和系统网络性能都会产生较大的影响。降低切换过程中的业务中断时间已成为降低切换时延的主要技术手段。相关技术中，第三代合作伙伴计划(3rd Generation Partnership Project，3GPP)协议中有两种降低切换时延的方式：
第一种是无随机接入信道(Random Access Channel-Less，RACH-Less)切换方式。RACH-Less切换方式需要源侧基站向UE下发切换命令，还需要UE向目标侧基站响应切换完成消息。在长期演进(Long Term Evolution，LTE)中，源侧基站通过无线资源控制(Radio Resource Control，RRC)信令向UE下发重配消息(RRCReconfiguration)之后，UE通过RRC信令向目标侧基站上报重配完成消息(ReconfigurationComplete)。RACH-Less切换方式需要保持源侧基站和目标侧基站之间的同步，从而节省UE向目标侧基站随机接入的时间。理论上，利用RACH-Less切换方式，可以减少10-12ms的切换时延，极大地减低切换中断时间，提升用户体验。
第二种则是无缝切换方式，切换过程中，UE保持和源侧基站的连接，直到UE完成了到目标侧基站的上下行同步才释放和源侧基站的连接，这样便可以实现切换过程中无业务数据中断。以LTE为例，UE向目标侧基站发送了切换完成消息之后才释放和源侧基站的连接。
相关技术中，3GPP中只提出了RACH-Less切换方式，没有规定RACH-Less切换方式的流程以及实现方案，同时也没有规定RACH-Less切换失败后的异常处理，一旦RACH-Less切换流程失败又没有异常处理，会影响用户体验。
发明内容
本申请实施例提供一种无线接入方式切换方法、基站、终端和可读存储介质，解决了RACH-Less切换方式无异常处理而造成UE与基站连接中断的问题。
本申请实施例提供了一种无线接入方式切换方法，应用于基站，所述方法包括：
在接收到终端发送的切换完成信令之后，向所述终端发送空口信令；其中，所述空口信令用于指示终端切换成功。
本申请实施例提供了一种无线接入方式切换方法，应用于终端，所述方法包括：
在接收到源侧基站发送的切换信令之后，向目标侧基站发送切换完成信令；
在未接收到目标侧基站发送的空口信令的情况下，向所述目标侧基站发起随机接入信道(Random Access Channel，RACH)流程。
本申请实施例提供了一种无线接入方式切换方法，应用于基站，所述方法包括：
在接收到终端发送的切换完成信令或者所述终端发送的缓存区状态报告BSR的情况下，向终端发送下行控制信息(Downlink Control Information，DCI0)。
本申请实施例提供了一种无线接入方式切换方法，应用于终端，所述方法包括：
在接收到源侧基站发送的切换信令之后，向目标侧基站发送切换完成信令，并向所述目标侧基站发送缓存区状态报告(Buffer Status Report，BSR)；
在未接收到目标侧基站发送的下行控制信息DCI0的情况下，向所述目标侧基站发起RACH流程。
本申请实施例提供了一种基站，所述基站包括存储器、处理器及存储在所述存储器上并可在所述处理器上运行的计算机程序，所述计算机程序被所述处理器执行时实现上述应用于基站的无线接入切换方法。
本申请实施例提供了一种终端，所述终端包括：存储器、处理器及存储在所述存储器上并可在所述处理器上运行的计算机程序，所述计算机程序被所述处理器执行时实现上述应用于终端的无线接入切换方法。
本申请实施例提供了一种计算机可读存储介质，所述计算机可读存储介质存储有一个或者多个程序，一个或者多个程序可被一个或者多个处理器执行，以实现如上述应用于基站的无线接入切换方法的步骤；和/或实现如上述应用于终端的无线接入切换方法的步骤。
附图说明
图1是本申请实施例提供的一种终端与基站之间的RACH-Less切换流程图；
图2是本申请实施例提供的一种无线接入切换方法流程框图；
图3是本申请实施例提供的另一种无线接入切换方法流程框图；
图4是本申请实施例提供的一种终端检测RACH-Less切换流程成功的流程图；
图5是本申请实施例提供的一种终端检测RACH-Less切换流程失败的流程图；
图6是本申请实施例提供的另一种无线接入切换方法流程框图；
图7是本申请实施例提供的一种基站检测RACH-Less切换流程成功的流程图；
图8是本申请实施例提供的一种基站检测RACH-Less切换流程失败的流程图；
图9是本申请实施例提供的一种应用于基站的无线接入切换装置的结构框图；
图10是本申请实施例提供的一种应用于终端的无线接入切换装置的结构框图；
图11是本申请实施例提供的一种基站与终端的结构图；
图12是本申请实施例提供的一种终端的硬件结构示意图。
具体实施方式
本申请中所描述的具体实施例仅仅用以解释本申请，并不用于限定本申请。
在本申请后续的描述中，使用用于表示元件的诸如“模块”、“部件”或“单元”的后缀仅为了对本申请进行说明，后缀本身没有特有的意义。因此，“模块”、“部件”或“单元”可以混合地使用。
终端可以以多种形式来实施。例如，本申请中描述的终端可以包括诸如机顶盒、移动终端、智能电话、笔记本电脑、数字广播接收器、(个人数字助理(Personal Digital Assistant，PDA)、平板电脑(Portable Android Device，PAD)、便携式多媒体播放器(Portable Media Player，PMP)、导航装置等等的终端以及诸如数字电视机(Television，TV)、台式计算机等等的固定终端。本申请实 施例中，假设终端是移动终端。然而，除了特别用于移动目的的元件之外，根据本申请的实施方式的构造，本申请的实施方式也能够应用于固定类型的终端。
在相关技术中，如图1所示，终端UE在源侧基站、目标侧基站之间发起RACH-Less流程，源侧基站向终端UE发送测量配置消息(RRC重配)，终端UE根据源侧基站下发的测量配置消息(RRC重配)进行相关测量，并将测量结果上报给源侧基站。源侧基站根据测量结果判定需要进行基站切换时，源侧基站向终端UE发送RRC重配消息(RRCReconfiguration)，即是切换信令；当终端UE完成重配时，向目标侧基站发送RRC重配完成消息(RRCReconfigurationComplete)，即是切换完成信令，从而完成RACH-Less流程。对于RACH-Less流程是否成功或者失败，相关技术中没有检测机制，当RACH-Less流程失败时，UE连接中断，UE检测到与基站连接中断后，才会发起RACH流程，与目标侧基站建立新的连接，空口信令和基站内部信令将大量增加，占用更多空口资源。
基于上述相关技术中的缺陷，本申请提出了以下实施例。
实施例1
如图2所示，本申请实施例提供了一种无线接入方式切换方法，应用于基站，所述方法包括：
S1010、在接收到终端发送的切换完成信令之后，向所述终端发送空口信令。
如图1所示，源侧基站根据测量结果判定需要进行基站切换时，源侧基站向终端UE发送RRC重配消息(RRCReconfiguration)，即是切换信令；当终端UE完成重配时，向目标侧基站发送RRC重配完成消息(RRCReconfigurationComplete)，也即是切换完成信令。
S1020、在所述空口指令未被传输到所述终端的情况下，触发所述终端向基站发起随机接入信道RACH流程。
目标侧基站向终端发送一空口信令，例如RRCReconfiguration；在预设的某一时间节点内，若终端没有收到目标侧基站发送的空口信令，则终端判定RACH-Less流程失败，终端立即向目标侧基站发起RACH流程。
若是没有RACH-Less流程切换失败后直接进行RACH流程的机制，终端掉线后，将重新发起完整的接入流程，空口信令和基站内部信令将大量增加，占用更多空口资源。
实施例2
如图3所示，本申请实施例提供了一种无线接入切换方法，应用于终端，该方法包括以下步骤：
S2010、在接收到源侧基站发送的切换信令并完成切换相关的操作之后，向目标侧基站发送切换完成信令。
S2020、在未接收到目标侧基站发送的空口信令的情况下，向所述目标侧基站发起RACH流程。
一实施例中，如图4和图5所示，源侧基站向终端UE发送测量配置消息(RRC重配)，终端UE根据源侧基站下发的测量配置消息(RRC重配)进行相关测量，并将测量结果上报给源侧基站。源侧基站根据测量结果判定需要进行基站切换时，发起RACH-Less流程。源侧基站向终端UE发送RRC重配消息(RRCReconfiguration)，即是切换信令；当终端UE完成重配时，终端向目标侧基站发送RRC重配完成消息(RRCReconfigurationComplete)，也即是切换完成信令。目标侧基站在接收到切换完成信令之后，向终端反馈一个空口信令，例如RRCReconfiguration；终端在某一时间节点内接收到目标侧基站发送的空口信令，说明RACH-Less流程成功。但是，在某一时间节点内，若是终端没有接收到目标侧基站发送的空口信令，例如目标侧基站没有接收到切换完成信令所以不会发送空口信令，则终端认为RACH-Less流程失败，终端立即向目标侧基站发起RACH流程。
实施例3
本申请实施例提出了提供了一种无线接入方式切换方法，应用于基站，所述方法包括：在接收到终端发送的切换完成信令或者所述终端发送的缓存区状态报告BSR之后，向终端发送下行控制信息DCI0。
一实施例中，如图7和图8所示，终端发起RACH-Less流程，目标侧基站会接收到终端发送的RRC重配完成消息(RRCReconfigurationComplete)，也即是切换完成信令；终端为了进一步确认与目标侧基站是否连接成功，终端在发送切换完成指令后会再次向目标侧基站发送缓存区状态报告BSR，目标侧基站若是接收到切换完成指令或者缓存区状态报告BSR，目标侧基站将会反馈下行控制信息DCI0至终端UE，终端收到DCI0之后，认为RACH-Less切换成功，终端无需向目标侧基站发起RACH流程。终端在某一时间节点内，没有收到下行控制信息DCI0，此时UE将认为RACH-Less切换流程失败，将发起RACH流程以保证终端UE接入至目标侧基站。
实施例4
如图6所示，本申请实施例提出了一种无线接入切换方法，应用于终端，所述方法包括以下步骤：
S3010、在接收到源侧基站发送的切换信令并完成切换相关的操作之后，向目标侧基站发送切换完成信令，并向所述目标侧基站发送缓存区状态报告BSR。
S3020、在未接收到目标侧基站发送的下行控制信息DCI0的情况下，向所述目标侧基站发起RACH流程。
一实施例中，如图7和图8所示，源侧基站向终端UE发送测量配置消息(RRC重配)，终端UE根据源侧基站下发的测量配置消息(RRC重配)进行相关测量，并将测量结果上报给源侧基站。源侧基站根据测量结果判定需要进行基站切换时，发起RACH-Less流程。源侧基站向终端UE发送RRC重配消息(RRCReconfiguration)，即是切换信令；当终端UE完成重配时，终端向目标侧基站发送RRC重配完成消息(RRCReconfigurationComplete)，也即是切换完成信令。同时，终端UE为了进一步确认是否与目标侧基站成功连接，终端UE向目标侧基站发送缓存区状态报告BSR，如果此时目标侧基站成功收到了RRCReconfigurationComplete消息，目标侧基站将会反馈下行控制信息DCI0至终端UE，终端收到DCI0之后，则认为RACH-Less切换成功，终端无需向目标侧基站发起RACH流程。
若此时目标侧基站没有收到RRCReconfigurationComplete消息，终端同样向目标侧基站发送BSR，但是由于目标侧基站没有收到RRCReconfigurationComplete消息，终端将无法收到下行控制信息DCI0，此时UE将认为RACH-Less切换流程失败，终端将发起RACH流程以保证终端UE接入至目标侧基站。本实施例使得终端UE能使用RACH-Less切换流程节约切换的中断时延，同时当RACH-Less切换流程异常时避免连接中断，提升用户感知，保障网络质量。
实施例5
如图9所示，本申请实施例提供了一种无线接入切换装置30，应用于基站，所述装置30包括：信令交互通讯模块310，设置为与终端建立连接，接收终端的反馈消息；连接切换模块320，设置为在收到所述终端接收空口RRC信令失败的消息的情况下，触发所述终端发起RACH流程。
实施例6
如图10所示，本申请实施例提供了一种无线接入切换装置40，应用于终端，所述装置40包括：信令交互通讯模块410，设置为与基站建立连接，发送反馈消息给所述基站；连接切换执行模块420，设置为在未接收到目标侧基站发送的下行控制信息DCI0的情况下，向所述目标侧基站发起RACH流程。
实施例7
本申请实施例提供了一种基站100，所述基站100包括存储器、处理器及存储在所述存储器上并可在所述处理器上运行的计算机程序，所述计算机程序被所述处理器执行时实现上述应用于基站的无线接入切换方法。
一实施例中，如图11所示，基站100上集成了RRC信令处理单元110，设置为在接收到终端发送的重配完成消息的RRC信令之后，向所述终端发送一空口RRC信令；连接切换模块120，设置为在收到所述终端接收所述空口RRC信令失败的消息的情况下，触发所述终端发起RACH流程。
实施例8
本申请实施例提出了一种终端200，所述终端200包括：存储器、处理器及存储在所述存储器上并可在所述处理器上运行的计算机程序。
一实施例中，如图11所示，终端200上设置有RACH-Less流程检测单元210，设置为在向目标侧基站发送重配完成消息的RRC信令之后，向所述目标侧基站发送缓存区状态报告BSR；连接切换执行模块220，设置为在未接收到目标侧基站发送的下行控制信息DCI0的情况下，向所述目标侧基站发起RACH流程。
一实施例中，如图12所示，图12为实现本申请任意实施例的一种终端的硬件结构示意图，该终端200可以包括：射频(Radio Frequency，RF)单元201、无线保真(Wireless Fidelity，WiFi)模块202、音频输出单元203、音频/视频(Audio/Video，A/V)输入单元204、传感器205、显示单元206、用户输入单元207、接口单元208、存储器209、处理器2010以及电源211等部件。图12中示出的终端结构并不构成对终端的限定，终端可以包括比图示更多或更少的部件，或者组合某些部件，或者不同的部件布置。
存储器209可设置为存储软件程序以及多种数据。存储器209可主要包括存储程序区和存储数据区，存储器209中，存储程序区可存储操作系统、至少一个功能所需的应用程序(比如声音播放功能、图像播放功能等)等；存储数据区可存储根据手机的使用所创建的数据(比如音频数据、电话本等)等。此 外，存储器209可以包括高速随机存取存储器，还可以包括非易失性存储器，例如至少一个磁盘存储器件、闪存器件、或其他易失性固态存储器件。
处理器2010是终端的控制中心，利用多种接口和线路连接整个终端的多个部分，通过运行或执行存储在存储器209内的软件程序和/或模块，以及调用存储在存储器209内的数据，执行终端的多种功能和处理数据，从而对终端进行整体监控。处理器2010可包括一个或多个处理单元。所述存储器209上的计算机程序被所述处理器2010执行时实现上述应用于终端的无线接入切换方法：在向目标侧基站发送重配完成消息的RRC信令之后，向所述目标侧基站发送缓存区状态报告BSR；在未接收到目标侧基站发送的下行控制信息DCI0的情况下，向所述目标侧基站发起RACH流程。
实施例9
本申请的一个实施例提出了一种计算机可读存储介质，所述计算机可读存储介质存储有一个或者多个程序，一个或者多个程序可被一个或者多个处理器执行，以实现如上述应用于基站的无线接入切换方法；和/或实现如上述应用于终端的无线接入切换方法。
本申请实施例的无线接入方式切换方法、基站、终端和可读存储介质，通过在终端UE或者目标侧基站(下一代基站(next generation NodeB，gNB))增加RACH-Less切换成功检测机制，在系统发现RACH-Less切换失败后，及时地进行UE向目标侧基站发起RACH流程的过程，避免UE连接中断，提升无线网络质量。
在本文中，术语“包括”、“包含”或者术语“包括”、“包含”的任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者装置不仅包括该一系列要素，而且还包括没有列出的其他要素，或者是还包括为该种过程、方法、物品或者装置所固有的要素。在没有限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括该要素的过程、方法、物品或者装置中还存在另外的相同要素。
上述本申请实施例序号仅仅为了描述，不代表实施例的优劣。

Claims (11)

  1. 一种无线接入方式切换方法，应用于基站，包括：
    在接收到终端发送的切换完成信令之后，向所述终端发送空口信令；其中，所述空口信令用于指示所述终端切换成功。
  2. 根据权利要求1所述的方法，其中，所述切换完成信令包括：无线资源控制重配完成消息RRCReconfigurationComplete；所述空口信令包括无线资源控制重配消息RRCReconfiguration。
  3. 一种无线接入方式切换方法，应用于终端，包括：
    在接收到源侧基站发送的切换信令之后，向目标侧基站发送切换完成信令；
    在未接收到所述目标侧基站发送的空口信令的情况下，向所述目标侧基站发起随机接入信道RACH流程。
  4. 根据权利要求3所述的方法，其中，所述切换完成信令包括无线资源控制重配完成消息RRCReconfigurationComplete；所述空口信令包括无线资源控制重配消息RRCReconfiguration。
  5. 一种无线接入方式切换方法，应用于基站，包括：
    在接收到终端发送的切换完成信令或者所述终端发送的缓存区状态报告BSR的情况下，向所述终端发送下行控制信息DCI0。
  6. 一种无线接入方式切换方法，应用于终端，包括：
    在接收到源侧基站发送的切换信令之后，向目标侧基站发送切换完成信令，并向所述目标侧基站发送缓存区状态报告BSR；
    在未接收到所述目标侧基站发送的下行控制信息DCI0的情况下，向所述目标侧基站发起随机接入信道RACH流程。
  7. 根据权利要求6所述的方法，还包括：在所述向目标侧基站发送切换完成信令之前，发起无随机接入信道RACH-Less流程。
  8. 根据权利要求6或7所述的方法，其中，所述切换信令包括：无线资源控制重配消息RRCReconfiguration；所述切换完成信令包括：无线资源控制重配完成消息RRCReconfigurationComplete。
  9. 一种基站，包括存储器、处理器及存储在所述存储器上并可在所述处理器上运行的计算机程序，所述计算机程序被所述处理器执行时实现如权利要求1、2和5中任一所述的无线接入切换方法。
  10. 一种终端，包括：存储器、处理器及存储在所述存储器上并可在所述处理器上运行的计算机程序，所述计算机程序被所述处理器执行时实现如权利 要求3、4和6-8中任一所述的无线接入切换方法。
  11. 一种计算机可读存储介质，所述计算机可读存储介质存储有至少一个程序，所述至少一个程序可被至少一个处理器执行，以实现如权利要求1-8任一所述的无线接入切换方法。
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