WO2020088651A1 - 切换控制方法以及通信装置 - Google Patents

切换控制方法以及通信装置 Download PDF

Info

Publication number
WO2020088651A1
WO2020088651A1 PCT/CN2019/115022 CN2019115022W WO2020088651A1 WO 2020088651 A1 WO2020088651 A1 WO 2020088651A1 CN 2019115022 W CN2019115022 W CN 2019115022W WO 2020088651 A1 WO2020088651 A1 WO 2020088651A1
Authority
WO
WIPO (PCT)
Prior art keywords
base station
handover
message
source
conditional
Prior art date
Application number
PCT/CN2019/115022
Other languages
English (en)
French (fr)
Inventor
张崇铭
刘仁茂
Original Assignee
夏普株式会社
张崇铭
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 夏普株式会社, 张崇铭 filed Critical 夏普株式会社
Priority to US17/290,438 priority Critical patent/US11974175B2/en
Publication of WO2020088651A1 publication Critical patent/WO2020088651A1/zh

Links

Images

Classifications

    • 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
    • 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
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0064—Transmission or use of information for re-establishing the radio link of control information between different access points
    • 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
    • H04W36/362—Conditional handover

Definitions

  • the present invention relates to the technical field of wireless communication, and more specifically, to a handover control method and a communication device according to the present invention.
  • the base station issues a handover command to the UE in advance and configures the UE to perform handover according to the previously received handover command when certain conditions are met, so that the early success of the handover command can improve the success rate of handover command reception Therefore, the delay caused by the failure of the switching command due to the failure of receiving the switching command to the service interruption is avoided.
  • the UE when it receives the CHO command, it does not immediately perform the handover, but waits until the set conditions are met, such as when the link quality is below a certain threshold.
  • CHO is delivered by the source base station, but it is uncertain when it will be executed by the user. Therefore, how the source base station knows to stop data transmission with the UE is a problem that needs to be solved.
  • the source primary base station and the source secondary base station serve the UE at the same time. The CHO is delivered by the source primary base station, but it is uncertain when it will be executed by the user. Therefore, how the source primary base station and the source secondary base station know to stop the data transmission with the UE is also a problem that needs to be solved.
  • the target primary base station increases the target secondary base station
  • the resources allocated by the target secondary base station corresponding to the relevant configuration of the secondary serving cell
  • this time-sensitiveness will affect the resource management and operation management of the UE and the base station How to avoid connection failure caused by configuration failure is a problem that needs to be solved. That is to say, how to perform resource management and handover control of the base station while keeping the resources allocated by the target secondary base station effective (timeliness) is a problem that needs to be solved in the prior art.
  • the present invention provides a handover control method and a communication device.
  • a handover control method including: a source base station sending a conditional handover request to a target base station; when the source base station receives a handover request confirmation message from the target base station, sending conditions to user equipment UE A handover message; and if the target base station receives an RRC connection reconfiguration complete message from the UE, sends a conditional handover complete message to the source base station.
  • the source base station that receives the conditional handover completion message forwards data to the target base station.
  • the target base station when the UE communicates with the source base station including the source primary base station and the source secondary base station based on dual connectivity, the target base station sends the conditional handover completion to the source primary base station News.
  • the source master base station when receiving the conditional handover completion message sent by the target base station, the source master base station sends a secondary base station release request message to the source secondary base station.
  • the UE when the conditional handover based on the conditional handover message is triggered, the UE sends a conditional handover start message to the source secondary base station.
  • the UE sends the conditional handover start message before sending the RRC connection reconfiguration complete message.
  • a handover control method in which a user equipment UE in a dual connection communicates with a source primary base station and a source secondary base station.
  • the handover control method includes: the source primary base station sends conditions to a target base station Handover request; when the source master base station receives the handover request confirmation message of the target base station, it sends a conditional handover message to the user equipment UE; and the UE sends a conditional handover message based on the conditional handover message to the The source secondary base station sends a conditional switching start message.
  • conditional handover start message is included in the MAC layer control information or RRC message.
  • the source secondary base station that receives the handover start message stops sending or providing data to the UE, and sends to the source primary base station that the conditional handover is triggered or initiated or In the executed instruction message, the source primary base station that received the instruction message stops sending or providing data to the UE.
  • a communication device including: a processor; and a memory that stores instructions; wherein the instructions execute the switching control method according to the context when executed by the processor.
  • FIG. 1 is a schematic timing chart showing an example of the handover control method of the present invention.
  • FIG. 2 is a schematic timing chart showing another example of the handover control method of the present invention.
  • FIG. 3 is a schematic timing chart showing still another example of the handover control method of the present invention.
  • FIG. 4 is a schematic timing chart showing another example of the handover control method of the present invention.
  • FIG. 5 is a schematic timing chart showing a conventional handover control method.
  • FIG. 6 is a block diagram showing the communication device of the present invention.
  • LTE mobile communication system uses the LTE mobile communication system and its subsequent evolution as an example application environment, taking LTE-enabled base station eNB and UE devices as examples, and specifically describes multiple embodiments according to the present invention.
  • the present invention is not limited to the following embodiments, but can be applied to more other wireless communication systems, such as eLTE communication systems, NR communication systems, and can be applied to other base stations and UE devices, such as supporting eLTE Base station and UE equipment, and base station gNB and UE equipment supporting NR.
  • FIG. 5 is a schematic timing chart showing a conventional handover control method.
  • the user equipment UE performs data transmission with the source primary base station and the source secondary base station.
  • the source primary base station sends a handover request to the target base station, and the source primary base station receives the target base station's handover request confirmation message (S502 ), Send RRC reconfiguration information to the UE (S503), and send a secondary base station release request to the source secondary base station (S504). And forward the data that arrived next and the data that has not been successfully transmitted to the target base station (S506, S507).
  • the source primary base station may directly send the secondary base station release request to the source secondary base station (S504), and forward the data to the target base station (S506).
  • the source secondary base station stops providing data transmission to the UE based on the received release request (S504).
  • the "RRC reconfiguration message for conditional handover” mentioned herein may refer to a conditional handover message, or an RRC reconfiguration message carrying configuration information related to conditional handover.
  • the communication between the UE and the source primary base station and the source secondary base station is normally performed. Therefore, there is a problem in the prior art handover control: how the source primary base station knows that communication with the UE should be stopped, and how the source secondary base station knows that communication with the UE should be stopped.
  • FIG. 1 is a schematic timing chart showing an example of the handover control method of the present invention.
  • step S101 the source base station sends a conditional handover request to the target base station, and in step S102, the target base station sends a conditional handover request confirmation to the source base station.
  • the source base station After receiving the confirmation of the conditional handover request sent by the target base station, the source base station sends a conditional handover message to the UE (S103), where the conditional handover message may be an RRC reconfiguration message.
  • the target base station After receiving the RRC connection reconfiguration complete message from the UE (S104), the target base station sends a handover complete message to the source base station (S105).
  • the target base station sends a conditional handover complete message to the source base station (S105), which indicates conditional handover The message of completion.
  • the purpose of this message is to notify the source base station that the UE has accessed the target base station, and optionally to notify the source base station that the UE performing conditional handover has accessed the target base station or that the UE has performed conditional handover.
  • condition switching completion message may be a message dedicated to this purpose, or a general message, and the general message carries instruction information indicating the aforementioned purpose.
  • the identity of the UE must be carried in the message, so that the source base station can identify the UE, for example, eNB UE X2AP ID,
  • the "RRC connection reconfiguration completion message from the UE" described herein, preferably, the reconfiguration completion message may be the following message:
  • It may also correspond to the RRC connection reconfiguration message that the UE previously received for conditional handover, or it may correspond to the RRC connection reconfiguration message performed by the UE when the conditional handover is triggered / started, or it may correspond to The condition switching command executed by the UE;
  • conditional handover process may also refer to a reconfiguration process performed by a UE to synchronize to a new cell when certain conditions are met.
  • the source base station may forward the data to the target base station (S106, S107).
  • the source base station receives the handover completion message (S105)
  • the source base station receives the handover completion message (S105)
  • the source base station has switched to another cell, so that it is not necessary to provide data to the UE, and the source base station and the UE can be stopped Data transmission between.
  • FIG. 2 is a schematic timing chart showing another example of the handover control method of the present invention.
  • a UE in dual connectivity performs data transmission with a source base station including a source primary base station and a source secondary base station.
  • steps S201 to S203 of Embodiment 2 are basically the same as steps S101 to S103 of Embodiment 1, only the “source base station” is changed to the “source master base station”, and the description of the same or similar content is omitted here. .
  • step S204 after receiving the RRC connection reconfiguration complete message from the UE, the target base station sends a handover completion message to the source master base station (S205).
  • the target base station sends the conditional handover completion to the source master base station News.
  • the purpose of this message is to notify the source base station that the UE has accessed the target base station, and optionally to notify the source base station that the UE performing conditional handover has accessed the target base station, or that the UE has performed the conditional handover.
  • the "conditional switching completion message" mentioned here may be a message dedicated to this purpose, or a general message, and the general message carries instruction information indicating the aforementioned purpose.
  • at least the identity of the UE must be carried in the message, so that the source base station can uniquely identify the UE, for example, eNB UE X2AP ID,
  • the source primary base station After receiving the handover completion message sent by the target base station (S205), the source primary base station sends a secondary base station release request to the source secondary base station (S206). It can be understood that when the source primary base station receives (S205), it is clear that the UE has switched to another cell, so that it is no longer necessary to provide data to the UE, and data transmission between the source primary base station and the UE can be stopped. The source primary base station can also determine that the source secondary base station can stop providing data to the UE, so that the source primary base station sends a secondary base station release request to the source secondary base station (S206)
  • the source secondary base station When the source secondary base station receives the secondary base station release request, it stops sending / providing data to the UE, and optionally, starts forwarding data.
  • FIG. 3 is a schematic timing chart showing still another example of the handover control method of the present invention.
  • Embodiment 3 also includes the steps of the source master base station sending a conditional handover request to the target base station; the target base station sending a conditional handover request confirmation to the source master base station.
  • the source master base station sending a conditional handover request to the target base station
  • the target base station sending a conditional handover request confirmation to the source master base station.
  • the source master base station After the source master base station receives the condition switching request confirmation sent by the target base station, in step S301, the source master base station sends a condition switching message to the UE, where the condition switching message may be an RRC reconfiguration message.
  • the UE When the condition corresponding to the conditional switching command is satisfied in the UE, or when the conditional switching is triggered, the UE sends information to the secondary base station that manages the secondary cell (S302), for example, a conditional switching start message may be sent to indicate that the conditional switching is triggered , Or instruct the UE that transmission in the secondary cell group will be suspended, and optionally, may further indicate the cause of the suspension when the conditional handover is triggered.
  • S3022 secondary base station that manages the secondary cell
  • the RRC layer of the UE instructs the SCG MAC to generate the MAC CE, which is used to indicate or carry at least one of the following information:
  • the UE's transmission in the secondary cell group will be suspended, and optionally, the conditional handover is triggered when it further indicates the cause of the suspension;
  • the configuration of the secondary cell group of the UE will be released, and optionally, the conditional handover is triggered when the reason for the release is further indicated;
  • the conditional switch is triggered or initiated.
  • the UE can stop the uplink transmission and downlink reception of the source SCG cell, and can stop the timers that control the SCG change or release, and can release the entire SCG configuration, or reconfigure the DRB, and Or, perform the corresponding configuration operation according to the SCG configuration in the RRC connection reconfiguration information for conditional handover.
  • the RRC layer of the UE when the condition corresponding to the conditional switching command is satisfied, or when the conditional switching is triggered, the RRC layer of the UE generates an RRC message, which is used to indicate or carry at least one of the following information:
  • the UE's transmission in the secondary cell group will be suspended, and optionally, the conditional handover is triggered when it further indicates the cause of the suspension;
  • the configuration of the secondary cell group of the UE will be released, and optionally, the conditional handover is triggered when the reason for the release is further indicated;
  • the conditional switch is triggered or initiated.
  • the UE can stop the uplink transmission and downlink reception of the source SCG cell, and can stop the timers related to controlling the SCG modification or release, and can release the entire SCG configuration, or reconfigure the DRB, and Or, perform the corresponding configuration operation according to the SCG configuration in the RRC connection reconfiguration information for conditional handover.
  • the RRC message described here can be transmitted through SRB3. That is, if the UE is not configured with SRB3, the UE may not transmit the RRC message.
  • the source secondary base station When the source secondary base station receives the conditional switching start information (S302), it may stop sending / providing data to the UE. Preferably, the source secondary base station may also send a message to the source primary base station to indicate that the UE's condition switching is triggered / started / executed. When the source primary base station receives the message indicating or carrying the information, the source primary base station may stop sending / providing data transmission to the UE. Preferably, the source secondary base station may send a secondary base station release request message (S303) (SENB, RELEASE, REQUIRED) to the source primary base station, and carry indication information in the message, indicating at least one of the following information through the indication information:
  • S303 secondary base station release request message
  • the UE's transmission in the secondary cell group will be suspended, and optionally, the conditional handover is triggered when it further indicates the cause of the suspension;
  • the configuration of the secondary cell group of the UE will be released, and optionally, the conditional handover is triggered when the reason for the release is further indicated;
  • the conditional switch is triggered or initiated.
  • the source primary base station may determine that the UE has performed the conditional handover based on the foregoing secondary base station release request message, and thus stop providing data to the UE.
  • FIG. 4 is a schematic timing chart showing another example of the handover control method of the present invention.
  • Embodiment 4 Embodiment 2 and Embodiment 3 can be used in combination.
  • the description is omitted here, and the corresponding parts in Embodiments 2 and 3 (FIGS. 2 and 3) described above can be referred to.
  • Embodiment 4 when the condition corresponding to the conditional switching command is satisfied, or when the conditional switching is triggered, the UE sends information to the secondary base station that manages the secondary cell (S402), which may be conditional switching start information . And, the target base station that received the RRC reconfiguration completion message sent by the UE sends a conditional handover completion message to the source master base station (S405).
  • the target base station that received the RRC reconfiguration completion message sent by the UE sends a conditional handover completion message to the source master base station (S405).
  • the target base station when the target base station receives a request for conditional handover from the source base station, the target base station sends a request to another base station ( (Referred to herein as a target secondary base station) sending a secondary base station increase request message, in which the target base station directly or indirectly, implicitly or explicitly indicates that the secondary base station increase request is used for conditional handover.
  • a target secondary base station sending a secondary base station increase request message, in which the target base station directly or indirectly, implicitly or explicitly indicates that the secondary base station increase request is used for conditional handover.
  • the target secondary base station that received the increase request message may determine whether to receive the increase request of the secondary base station based on the indication information.
  • the secondary base station increase request message received by the base station may carry a time parameter, and the parameter is used for the secondary base station to set a timer T DCoverall .
  • the specific setting method may be that the target secondary base station directly sets the running time of the timer equal to the value of the time parameter; or sets the running time of the timer equal to the value of the time parameter plus or minus a certain variable; or Using this time parameter as a reference to set the running time of the timer can be considered as setting the time length of the timer T DCoverall based on this time parameter.
  • the target secondary base station When the secondary base station increase request is received / confirmed by the target secondary base station, the target secondary base station will start the timer T DCoverall . When the timer runs out, the target secondary base station will initiate the secondary base station release request, that is, send the secondary base station release request to the target base station (SENB RELEASE REQUIRED); if the target secondary base station receives information about the completion of reconfiguration from the target base station during the timer T DCoverall operation, it stops running the timer T DCoverall .
  • the timer T0 is started.
  • the method for setting the duration of T0 is the same as the T DCoverall mentioned above.
  • T0 and T DCoverall is that T0 is only used for secondary base station addition requests related to conditional handover requests, while T DCoverall is used outside of secondary base station requests that are not related to conditional handover.
  • condition-related handover related information for example, RRC reconfiguration message
  • the corresponding if it contains the configuration of dual connectivity, that is, it contains both the configuration of the primary serving cell group and the configuration of the secondary serving cell group, then the corresponding , May also include a duration configuration for the validity of the configuration of the primary serving cell group, and a duration configuration for the validity of the configuration of the secondary serving cell group.
  • the following operations can be performed:
  • the UE When the UE receives the dual connection configuration for conditional handover, it starts different timers T1 and T2 for the configuration of the primary serving cell and the configuration of the secondary serving cell, respectively.
  • the duration of T1 is configured as described above for the primary serving cell
  • the duration configuration of the validity of the configuration; the duration configuration of T2 is the duration configuration of the validity of the configuration for the secondary serving cell group described above.
  • the preferred T2 is less than or equal to T1.
  • the "configuration failure" here means that the UE will not perform the corresponding configuration.
  • the UE may perform the related configuration of the received primary serving cell without performing the related configuration of its corresponding secondary serving cell.
  • the reconfiguration completion message sent to the target base station may further indicate that the relevant configuration of the secondary cell is released.
  • "do not perform the relevant configuration of its corresponding secondary serving cell” is related to the configuration of the UE before performing the conditional handover. If the UE does not have the dual connection configuration before performing the conditional handover, only the relevant configuration of the primary serving cell, the UE does not Perform the relevant configuration of its corresponding secondary serving cell; if the UE has a valid dual connectivity configuration before performing the conditional handover, then "UE does not perform the relevant configuration of its corresponding secondary serving cell” specifically means that the UE releases the existing secondary service The cell-related configuration, and preferably, does not perform the related configuration of the secondary serving cell included in the conditional handover instruction that it receives.
  • the target base station may send a secondary base station release request (SENB RELEASE REQUEST) ).
  • FIG. 6 is a block diagram showing the communication device 60 of the present invention.
  • the communication device 60 includes a processor 601 and a memory 602.
  • the processor 601 may include, for example, a microprocessor, a microcontroller, an embedded processor, or the like.
  • the memory 602 may include, for example, volatile memory (such as random access memory RAM), hard disk drive (HDD), non-volatile memory (such as flash memory), or other memory systems.
  • the memory 602 stores program instructions. When the instruction is executed by the processor 601, it can execute the above-mentioned handover control method described in detail in this disclosure.
  • the program running on the device according to the present invention may be a program that causes a computer to realize the functions of the embodiments of the present invention by controlling a central processing unit (CPU).
  • the program or information processed by the program may be temporarily stored in volatile memory (such as random access memory RAM), hard disk drive (HDD), non-volatile memory (such as flash memory), or other memory systems.
  • the program for realizing the functions of the embodiments of the present invention may be recorded on a computer-readable recording medium.
  • the corresponding functions can be realized by causing the computer system to read the programs recorded on the recording medium and execute the programs.
  • the so-called "computer system” here may be a computer system embedded in the device, and may include an operating system or hardware (such as a peripheral device).
  • the "computer-readable recording medium” may be a semiconductor recording medium, an optical recording medium, a magnetic recording medium, a recording medium that dynamically stores a program for a short time, or any other recording medium readable by a computer.
  • circuits for example, single-chip or multi-chip integrated circuits.
  • Circuits designed to perform the functions described in this specification may include general-purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs), or other programmable logic devices, discrete Gate or transistor logic, discrete hardware components, or any combination of the above devices.
  • DSPs digital signal processors
  • ASICs application specific integrated circuits
  • FPGAs field programmable gate arrays
  • a general-purpose processor may be a microprocessor, or any existing processor, controller, microcontroller, or state machine.
  • the above circuit may be a digital circuit or an analog circuit.
  • the present invention is not limited to the above-mentioned embodiment. Although various examples of the embodiments have been described, the present invention is not limited to this.
  • Fixed or non-mobile electronic equipment installed indoors or outdoors can be used as terminal equipment or communication equipment, such as AV equipment, kitchen equipment, cleaning equipment, air conditioners, office equipment, vending machines, and other household appliances.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

本发明提供一种切换控制方法以及通信装置，所述切换控制方法包括：源基站向目标基站发送条件切换请求；所述源基站接收到所述目标基站的切换请求确认消息时，向用户设备UE发送条件切换消息；和若所述目标基站接收到来自所述UE的RRC连接重配置完成消息，则向所述源基站发送条件切换完成消息。

Description

切换控制方法以及通信装置 技术领域
本发明涉及无线通信技术领域，更具体地，本发明涉及的切换控制方法以及通信装置。
背景技术
随着移动通信的快速增长和技术的巨大进步，世界将走向一个完全互联互通的网络社会，即任何人或任何东西在任何时间和任何地方都可以获得信息和共享数据。预计到2020年，互联设备的数量将达到500亿部，其中仅有100亿部左右可能是手机和平板电脑，其它的则不是与人对话的机器，而是彼此对话的机器。因此，如何设计系统以更好地支持万物互联是一项需要深入研究的课题。
为此，在2016年3月举行的第三代合作伙伴计划(3GPP)RAN#64次全会上，提出了新5G无线接入技术的研究课题(参见非专利文献：RP-160671New SID Proposal：Study on New Radio Access Technology)。该项目的研究目的之一是找到用于满足NR中的移动性需求之一：无缝切换，即在小区切换过程中能够满足0毫秒的切换中断时间。在正在研究的降低切换中断时间的解决方案中，有一种解决方法称为基于条件的切换(Conditional HandOver，CHO)。在CHO机制中，基站提前下发切换命令给UE并配置UE在一定条件满足时再根据之前收到的切换命令来执行切换，这样通过切换命令的提前下发可以提高切换命令接收的成功率，从而避免因切换命令接收失败而带来的切换失败对业务中断带来的时延。
和传统的切换不同，UE收到CHO命令时，并不马上执行切换，而是要等到满足设定的条件，例如链路质量低于某个门限时才会执行CHO。对于一个处于单连接的UE，CHO由源基站下发，但不确定何时会被用户执行，因此，源基站如何知晓停止与UE之间的数据传输是一个需要 解决的问题。类似的，对于一个处于双连接(Dual Connectiveity)的UE，源主基站和源辅基站同时为UE服务。CHO由源主基站下发，但不确定何时会被用户执行，因此源主基站以及源辅基站如何知晓停止与UE之间的数据传输也是一个需要解决的问题。
此外，目标主基站在增加目标辅基站时，由于目标辅基站分配的资源(对应于辅服务小区的相关配置)是有时效性的，这种时效性会影响UE以及基站的资源管理和操作管理，如何避免配置失效导致的连接失败，是需要解决的问题。也就是说，如何保持目标辅基站分配的资源有效(时效性)的情况下，进行基站的资源管理以及切换控制，是现有技术中需要解决的问题。
发明内容
为了解决上述问题中的至少一部分，本发明提供了一种切换控制方法以及通信装置。
根据本发明的第一方面，提供一种切换控制方法，包括：源基站向目标基站发送条件切换请求；所述源基站接收到所述目标基站的切换请求确认消息时，向用户设备UE发送条件切换消息；和若所述目标基站接收到来自所述UE的RRC连接重配置完成消息，则向所述源基站发送条件切换完成消息。
在上述切换控制方法中，接收到所述条件切换完成消息的所述源基站向所述目标基站转发数据。
在上述切换控制方法中，在所述UE基于双连接与包含源主基站以及源辅基站的所述源基站进行通信的情况下，所述目标基站向所述源主基站发送所述条件切换完成消息。
在上述切换控制方法中，所述源主基站在接收到所述目标基站发送的所述条件切换完成消息时，向所述源辅基站发送辅基站释放请求消息。
在上述切换控制方法中，所述UE在基于所述条件切换消息的条件切换被触发时，向所述源辅基站发送条件切换启动消息。
在上述切换控制方法中，所述UE在发送所述RRC连接重配置完成消息之前，发送所述条件切换启动消息。
根据本发明的第二方面，提供一种切换控制方法，处于双连接的用 户设备UE与源主基站以及源辅基站进行通信，所述切换控制方法包括：所述源主基站向目标基站发送条件切换请求；所述源主基站接收到所述目标基站的切换请求确认消息时，向用户设备UE发送条件切换消息；和所述UE在基于所述条件切换消息的条件切换被触发时，向所述源辅基站发送条件切换启动消息。
在上述切换控制方法中，所述条件切换启动消息包含于MAC层控制信息或者RRC消息。
在上述切换控制方法中，接收到所述切换启动消息的所述源辅基站停止向所述UE发送或提供数据，并且向所述源主基站发送表示所述条件切换被触发或被启动或被执行的指示消息，接收到所述指示消息的所述源主基站停止向所述UE发送或提供数据。
根据本发明的第三方面，提供一种通信装置，包括：处理器；以及存储器，存储有指令；其中，所述指令在由所述处理器运行时执行根据上下文所述的切换控制方法。
附图说明
图1是表示本发明的切换控制方法的一个例子的示意时序图。
图2是表示本发明的切换控制方法的另一例子的示意时序图。
图3是表示本发明的切换控制方法的又一例子的示意时序图。
图4是表示本发明的切换控制方法的其他例子的示意时序图。
图5是表示现有技术中的切换控制方法的示意时序图。
图6是表示本发明的通信装置的框图。
具体实施方式
下面结合附图和具体实施方式对本发明进行详细阐述。应当注意，本发明不应局限于下文所述的具体实施方式。另外，为了简便起见，省略了对与本发明没有直接关联的公知技术的详细描述，以防止对本发明的理解造成混淆。
在具体描述之前，先对本发明中提到的若干术语做如下说明。除非另有指出，本发明中涉及的术语都具有下文的含义
UE    User Equipment用户设备
NR     New Radio 新一代无线技术
LTE    Long Term Evolution 长期演进技术
eLTE    Enhaced Long Term Evolution 增强的长期演进技术
RRC    Radio Resource Control 无线资源控制(层)
MAC    Medium Access Control 媒体接入控制(层)
MAC CE   MAC Control Element MAC层控制信息
MCG   Master Cell Group 主小区组
MCG ENB   Master eNB 主基站
SCG   Secondary Cell Group 辅助小区组
SCG ENB   Secondary eNB 辅基站
SRB   signaling bearer 信令承载
HANDOVER REQUEST 切换请求
HANDOVER REQUEST ACKNOWLEDGE 切换请求确认
SENB RELEASE REQUEST 辅基站释放请求(主基站发送，辅基站接收)
SENB RELEASE REQUIRED 辅基站释放请求(辅基站发送，主基站接收)
SN STATUS TRANSFER 序号状态传输
UE CONTEXT RELEASE UE上下文释放
下文以LTE移动通信系统及其后续的演进版本作为示例应用环境，以支持LTE的基站eNB和UE设备为例，具体描述了根据本发明的多个实施方式。然而，需要指出的是，本发明不限于以下实施方式，而是可适用于更多其它的无线通信系统，例如eLTE通信系统，NR通信系统，而且可以适用于其他基站和UE设备，例如支持eLTE的基站和UE设备，以及支持NR的基站gNB和UE设备。
在对本发明的具体实施例进行说明之前，基于图5对现有技术中的一般性的切换控制方法进行简单说明。
图5是表示现有技术中的切换控制方法的示意时序图。如图5所示，用户设备UE与源主基站以及源辅基站进行数据传输，在步骤S501中，源主基站向目标基站发送切换请求，源主基站收到目标基站的切换请求 确认消息(S502)后，向UE发送RRC重配置信息(S503)，以及向源辅基站发送辅基站释放请求(S504)。并且把接下来到达的数据以及未发送成功的数据转发给目标基站(S506，S507)。
因为正常情况下，UE接收到RRC重配置信息(S503)后会立刻执行切换的流程，同步到目标基站指派的目标小区。所以，源主基站可以直接向源辅基站发送辅基站释放请求(S504)，以及将数据转发给目标基站(S506)。源辅基站基于收到的释放请求(S504)，停止向UE提供数据传输。
然而，在条件切换中，当UE接收到了用于条件切换的RRC重配置消息，需要等到条件切换的条件被满足了才会执行切换。这里所述的“用于条件切换的RRC重配置消息”可以是指条件切换消息，或者是携带了条件切换相关配置信息的RRC重配置消息。在UE执行条件切换之前，UE和源主基站以及源辅基站的通信是正常执行的。因此，现有技术的切换控制中存在如下问题：源主基站如何知晓应当停止和UE的通信，以及源辅基站如何知晓应当停止和UE的通信。
以下，对本发明所涉及的具体实施例进行详细说明。另外，本发明的实施例是为了容易理解本发明而进行的示例性说明，并不是对本发明的限定。
实施例1
基于图1对本发明的实施例1进行详细说明。图1是表示本发明的切换控制方法的一个例子的示意时序图。
如图1所示，在步骤S101中，源基站向目标基站发送条件切换请求，在步骤S102中，目标基站向源基站发送条件切换请求确认。源基站接收到目标基站发送的条件切换请求确认之后，向UE发送条件切换消息(S103)，其中，该条件切换消息可以是RRC重配置消息。
目标基站接收到来自UE的RRC连接重配置完成消息(S104)之后，向源基站发送切换完成消息(S105)，优选的，目标基站向源基站发送条件切换完成消息(S105)，即指示条件切换完成的消息。该消息的目的是通知源基站UE已经接入目标基站，以及可选的通知源基站执行条件切换的UE已经接入目标基站或者是该UE已经执行完成条件切换。
这里所述的“条件切换完成消息”可以是专门用于该目的的消息， 也可以是一条通用消息，在该通用消息中，携带了指示前述目的的指示信息。此外，在该消息中至少要携带UE的身份标识，使得源基站能够识别该UE，例如eNB UE X2AP ID，
这里所述的“来自UE的RRC连接重配置完成消息”，优选的，该重配置完成消息可以是如下的消息：
可以是指示UE完成了条件切换到新小区发送的第一条RRC消息；
还可以是对应于UE之前接收到的用于条件切换的RRC连接重配置消息，又或者是对应于当条件切换被触发/启动时，UE所执行的RRC连接重配置消息，又或者是对应于UE所执行的条件切换命令；
由于切换又可以被称为是执行了同步到新小区的重配置过程，因此，本文所指的条件切换过程还可以是指当满足特定条件，UE执行的同步到新小区的重配置过程。
当源基站接收到目标基站发送的切换完成消息(S105)后，可以将数据转发给目标基站(S106，S107)。在这一过程中，可以理解为，当源基站接收到切换完成消息(S105)时，明确地知道UE已经切换到别的小区，从而不需要再向该UE提供数据，可以停止源基站和UE之间数据传输。
实施例2
基于图2对本发明的实施例2进行说明，图2是表示本发明的切换控制方法的另一例子的示意时序图。
在实施例2中，如图2所示，处于双连接(Dual Connectiveity)的UE与包含源主基站和源辅基站的源基站进行数据传输。如图2所示，实施例2的步骤S201～S203与实施例1的步骤S101～S103基本相同，仅将“源基站”变更为“源主基站”，对于相同或者相近的内容在此省略说明。
在步骤S204中，目标基站接收到来自UE的RRC连接重配置完成消息之后，向源主基站发送切换完成消息(S205)，优选的，在步骤S205中，目标基站向源主基站发送条件切换完成消息。该消息的目的是通知源基站UE已经接入目标基站，以及可选的通知源基站执行条件切换的UE已经接入目标基站，又或者是该UE已经执行完成条件切换。这里所述的“条件切换完成消息”可以是专门用于该目的的消息，也可以是一 条通用消息，在该通用消息中，携带了指示前述目的的指示信息。此外，在该消息中至少要携带UE的身份标识，使得源基站能够唯一识别该UE，例如eNB UE X2AP ID，
当源主基站接收到目标基站发送的切换完成消息(S205)后，向源辅基站发送辅基站释放请求(S206)。可以理解为，当源主基站接收到(S205)，明确的知道UE已经切换到别的小区，从而不需要再向该UE提供数据，可以停止源主基站和UE之间数据传输。源主基站还可以判定源辅基站可以停止向UE提供数据，从而，源主基站向源辅基站发送辅基站释放请求(S206)
当源辅基站接收到辅基站释放请求时，停止向UE发送/提供数据，以及可选的，开始转发数据。
实施例3
基于图3对本发明的实施例3进行详细说明。图3是表示本发明的切换控制方法的又一例子的示意时序图。
实施例3中同样包含：源主基站向目标基站发送条件切换请求的步骤；目标基站向源主基站发送条件切换请求确认的步骤。为了简洁起见，图3中并未体现。
在源主基站接收到目标基站发送的条件切换请求确认之后，在步骤S301中，源主基站向UE发送条件切换消息，其中，该条件切换消息可以是RRC重配置消息。
在UE中当条件切换命令对应的条件被满足时，或者条件切换被触发时，UE向管理辅小区的辅基站发送信息(S302)，例如可以发送条件切换启动消息，用于指示条件切换被触发，或者指示UE在辅小区群的传输将被挂起，以及可选的，可以进一步指示挂起的原因时条件切换被触发。
具体而言，而已进行如下操作。
当条件切换命令对应的条件被满足时，或者是条件切换被触发时，UE的RRC层指示SCG MAC生成MAC CE，该MAC CE用来指示或者携带下述的至少一个信息：
UE在辅小区群的传输将被挂起，以及可选的，进一步指示挂起的原因时条件切换被触发；
UE的辅小区群的配置将被释放，以及可选的，进一步指示释放的原因时条件切换被触发；
条件切换被触发或者启动。
当该MAC CE被发送之后，UE可以停止与源SCG小区的上行传输和下行接收，以及可以停止控制SCG更改或者释放的有关的定时器，以及可以释放整个SCG配置，或者是重配置DRB，又或者是根据用于条件切换的RRC连接重配置信息中的SCG配置执行相应的配置操作。
或者，作为另一例，当条件切换命令对应的条件被满足时，或者时条件切换被触发时，UE的RRC层生成RRC消息，该消息用来指示或者携带下述的至少一个信息：
UE在辅小区群的传输将被挂起，以及可选的，进一步指示挂起的原因时条件切换被触发；
UE的辅小区群的配置将被释放，以及可选的，进一步指示释放的原因时条件切换被触发；
条件切换被触发或者启动。
当该RRC消息被发送之后，UE可以停止与源SCG小区的上行传输和下行接收，以及可以停止控制SCG更改或者释放的有关的定时器，以及可以释放整个SCG配置，或者是重配置DRB，又或者是根据用于条件切换的RRC连接重配置信息中的SCG配置执行相应的配置操作。
这里所述的RRC消息可以通过SRB3传输。即如果UE没有被配置SRB3，那么UE可以不传输该RRC消息。
当源辅基站接收到上述条件切换启动信息(S302)时，可以停止向UE发送/提供数据。优选的，源辅基站还可以向源主基站发送消息，指示UE的条件切换被触发/启动/执行。当源主基站接收到指示或携带该信息的消息时，源主基站可以停止向UE发送/提供数据传输。优选的，源辅基站可以向源主基站发送辅基站释放请求消息(S303)(SENB RELEASE REQUIRED)，并在该消息中携带指示信息，通过指示信息来指示下述的至少一个信息：
UE在辅小区群的传输将被挂起，以及可选的，进一步指示挂起的原因时条件切换被触发；
UE的辅小区群的配置将被释放，以及可选的，进一步指示释放的 原因时条件切换被触发；
条件切换被触发或者启动。
源主基站可以基于上述辅基站释放请求消息判定UE已经执行了条件切换，因此停止向UE提供数据。
实施例4
下面，基于图4对本发明的实施例4进行说明。图4表示本发明的切换控制方法的其他例子的示意时序图。
在实施例4中，可以将实施例2和实施例3相结合来使用。对于与实施例2、3相同或者相近的内容，在此省略其说明，可参照上述实施例2、3(图2、3)中相应的部分。
具体而言，在实施例4中，当条件切换命令对应的条件被满足时，或者条件切换被触发时，UE向管理辅小区的辅基站发送信息(S402)，该信息可以是条件切换启动信息。并且，接收到UE发送的RRC重配置完成消息的目标基站，向源主基站发送条件切换完成消息(S405)。接收到该条件切换完成消息之后的具体操作内容，可以参照实施例2以及实施例3中的内容，在此不再重复说明。
此外，目标主基站在增加目标辅基站时，由于目标辅基站分配的资源(对应于辅服务小区的相关配置)是有时效性的，这种时效性会影响UE以及基站的资源管理和操作管理，如何避免配置失效导致的误操作，以及相应的连接失败，是需要解决的问题。以下的实施例5～7中针对上述问题进行了探讨。
实施例5
在条件切换准备阶段(即源基站发送切换请求以及接收目标基站发送的切换请求确认这段期间)，当目标基站接收到来自源基站的、关于条件切换的请求时，目标基站向另外一个基站(这里称为目标辅基站)发送辅基站增加请求消息，在该增加请求消息中，目标基站直接或者间接，隐示或者显示地指示该辅基站增加请求用于条件切换。
接收到该增加请求消息的目标辅基站可以基于所述的指示信息判断是否要接收该辅基站增加请求。
实施例6
在实施例5的基础上，在基站接收到的辅基站增加请求消息中，可以携带时间参数，该参数用于辅基站设置定时器T DCoverall。
具体的设置方法可以是，目标辅基站直接设置定时器的运行时长等于该时间参数的值；又或者是设置定时器的运行时长等于该时间参数的值加上或者减去某个变量；又或者是以该时间参数为参考设置定时器的运行时长，即可认为是基于该时间参数设置定时器T DCoverall的时长。
当辅基站增加请求被目标辅基站接收/确认，目标辅基站会启动定时器T DCoverall，当该定时器运行超时时，目标辅基站会发起辅基站释放请求，即向目标基站发送辅基站释放请求(SENB RELEASE REQUIRED)；如果在定时器T DCoverall运行期间，目标辅基站接收到了来自目标基站的重配置完成相关的信息，则停止运行定时器T DCoverall。
又或者，当基站接收到的指示用于条件切换请求的(或者是和条件切换请求相关的)辅基站增加请求消息时，启动定时器T0。T0的时长设置方法同上述T DCoverall相同。T0和T DCoverall的差别在于T0仅用于和条件切换请求相关的辅基站增加请求，而T DCoverall用于与条件切换无关的辅基站请求之外。
实施例7
在UE接收到的携带条件切换相关信息的消息(例如RRC重配置消息)中，如果包含了双连接的配置，即既包含主服务小区组的配置，又包含辅服务小区组的配置，那么相应的，还可以包含针对主服务小区组的配置的有效性的时长配置，以及包含针对辅服务小区组的配置的有效性的时长配置。在具体实施时，可以进行如下操作：
当UE接收到用于条件切换的双连接配置，分别为主服务小区的配置和辅服务小区的配置启动不同的定时器T1和T2，T1的时长配置为前文所述的针对主服务小区组的配置的有效性的时长配置；T2的时长配置为前文所述的针对辅服务小区组的配置的有效性的时长配置。优选的T2小于等于T1。
当T2超时时，辅服务小区的相关配置失效；
当T1超时时，主服务小区的相关配置失效。
这里的“配置失效”是指UE不会执行相应的配置。
当T2超时，T1还在运行时，如果对应的条件切换被触发，那么UE可以按照接收到的主服务小区的相关配置执行，而不执行其相应的辅服务小区的相关配置。并且，在接下来发送给目标基站的重配置完成消息中还可以进一步指示辅小区的相关配置被释放。
其中“不执行其相应的辅服务小区的相关配置”根据UE在执行条件切换之前的配置有关，如果UE在执行条件切换之前不存在双连接配置，仅仅只有主服务小区的相关配置，那么UE不执行其相应的辅服务小区的相关配置；如果UE在执行条件切换之前存在有效的双连接配置，那么“UE不执行其相应的辅服务小区的相关配置”具体是指UE释放已有的辅服务小区相关的配置，以及优选的，不执行其接收到的、在条件切换指示中包含的辅服务小区的相关配置。
相应地，当目标基站接收到UE发送的重配置完成消息，且在消息中指示了辅小区的相关配置被释放，或者不成功，目标基站可以向目标辅基站发送辅基站释放请求(SENB RELEASE REQUEST)。
实施例8
基于图6对本发明的实施例8进行说明。图6是表示本发明的通信装置60的框图。如图6所示，该通信装置60包括处理器601和存储器602。处理器601例如可以包括微处理器、微控制器、嵌入式处理器等。存储器602例如可以包括易失性存储器(如随机存取存储器RAM)、硬盘驱动器(HDD)、非易失性存储器(如闪速存储器)、或其他存储器系统等。存储器602上存储有程序指令。该指令在由处理器601运行时，可以执行本公开详细描述的上述切换控制方法。
运行在根据本发明的设备上的程序可以是通过控制中央处理单元(CPU)来使计算机实现本发明的实施例功能的程序。该程序或由该程序处理的信息可以临时存储在易失性存储器(如随机存取存储器RAM)、硬盘驱动器(HDD)、非易失性存储器(如闪速存储器)、或其他存储器系统中。
用于实现本发明各实施例功能的程序可以记录在计算机可读记录 介质上。可以通过使计算机系统读取记录在所述记录介质上的程序并执行这些程序来实现相应的功能。此处的所谓“计算机系统”可以是嵌入在该设备中的计算机系统，可以包括操作系统或硬件(如外围设备)。“计算机可读记录介质”可以是半导体记录介质、光学记录介质、磁性记录介质、短时动态存储程序的记录介质、或计算机可读的任何其他记录介质。
用在上述实施例中的设备的各种特征或功能模块可以通过电路(例如，单片或多片集成电路)来实现或执行。设计用于执行本说明书所描述的功能的电路可以包括通用处理器、数字信号处理器(DSP)、专用集成电路(ASIC)、现场可编程门阵列(FPGA)、或其他可编程逻辑器件、分立的门或晶体管逻辑、分立的硬件组件、或上述器件的任意组合。通用处理器可以是微处理器，也可以是任何现有的处理器、控制器、微控制器、或状态机。上述电路可以是数字电路，也可以是模拟电路。因半导体技术的进步而出现了替代现有集成电路的新的集成电路技术的情况下，本发明的一个或多个实施例也可以使用这些新的集成电路技术来实现。
此外，本发明并不局限于上述实施例。尽管已经描述了所述实施例的各种示例，但本发明并不局限于此。安装在室内或室外的固定或非移动电子设备可以用作终端设备或通信设备，如AV设备、厨房设备、清洁设备、空调、办公设备、自动贩售机、以及其他家用电器等。
如上，已经参考附图对本发明的实施例进行了详细描述。但是，具体的结构并不局限于上述实施例，本发明也包括不偏离本发明主旨的任何设计改动。另外，可以在权利要求的范围内对本发明进行多种改动，通过适当地组合不同实施例所公开的技术手段所得到的实施例也包含在本发明的技术范围内。此外，上述实施例中所描述的具有相同效果的组件可以相互替代。

Claims (10)

  1. 一种切换控制方法，包括：
    源基站向目标基站发送条件切换请求；
    所述源基站接收到所述目标基站的切换请求确认消息时，向用户设备UE发送条件切换消息；和
    若所述目标基站接收到来自所述UE的RRC连接重配置完成消息，则向所述源基站发送条件切换完成消息。
  2. 根据权利要求1所述的切换控制方法，其中，
    接收到所述条件切换完成消息的所述源基站向所述目标基站转发数据。
  3. 根据权利要求1所述的切换控制方法，其中，
    在所述UE基于双连接与包含源主基站以及源辅基站的所述源基站进行通信的情况下，所述目标基站向所述源主基站发送所述条件切换完成消息。
  4. 根据权利要求3所述的切换控制方法，其中，
    所述源主基站在接收到所述目标基站发送的所述条件切换完成消息时，向所述源辅基站发送辅基站释放请求消息。
  5. 根据权利要求3所述的切换控制方法，其中，
    所述UE在基于所述条件切换消息的条件切换被触发时，向所述源辅基站发送条件切换启动消息。
  6. 根据权利要求5所述的切换控制方法，其中，
    所述UE在发送所述RRC连接重配置完成消息之前，发送所述条件切换启动消息。
  7. 一种切换控制方法，处于双连接的用户设备UE与源主基站以及源辅基站进行通信，所述切换控制方法包括：
    所述源主基站向目标基站发送条件切换请求；
    所述源主基站接收到所述目标基站的切换请求确认消息时，向用户设备UE发送条件切换消息；和
    所述UE在基于所述条件切换消息的条件切换被触发时，向所述源辅基站发送条件切换启动消息。
  8. 根据权利要求7所述的切换控制方法，其中，
    所述条件切换启动消息包含于MAC层控制信息或者RRC消息。
  9. 根据权利要求7所述的切换控制方法，其中，
    接收到所述切换启动消息的所述源辅基站停止向所述UE发送或提供数据，并且向所述源主基站发送表示所述条件切换被触发或被启动或被执行的指示消息，
    接收到所述指示消息的所述源主基站停止向所述UE发送或提供数据。
  10. 一种通信装置，包括：
    处理器；以及
    存储器，存储有指令；
    其中，所述指令在由所述处理器运行时执行根据权利要求1～9的任意一项所述的切换控制方法。
PCT/CN2019/115022 2018-11-01 2019-11-01 切换控制方法以及通信装置 WO2020088651A1 (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US17/290,438 US11974175B2 (en) 2018-11-01 2019-11-01 Handover control method and communications device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201811294705.3A CN111132247B (zh) 2018-11-01 2018-11-01 切换控制方法以及通信装置
CN201811294705.3 2018-11-01

Publications (1)

Publication Number Publication Date
WO2020088651A1 true WO2020088651A1 (zh) 2020-05-07

Family

ID=70464622

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2019/115022 WO2020088651A1 (zh) 2018-11-01 2019-11-01 切换控制方法以及通信装置

Country Status (3)

Country Link
US (1) US11974175B2 (zh)
CN (1) CN111132247B (zh)
WO (1) WO2020088651A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021236001A1 (en) * 2020-05-21 2021-11-25 Telefonaktiebolaget Lm Ericsson (Publ) Methods and apparatuses for early data forwarding in conditional handover of a ue in multi-connectivity

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111565426B (zh) * 2019-02-14 2024-01-16 华为技术有限公司 信息传输的方法及装置
WO2021080481A1 (en) * 2019-10-24 2021-04-29 Telefonaktiebolaget Lm Ericsson (Publ) User equipment, first network node, second network node and methods for handling a conditional handover in a wireless communications network
WO2021146286A1 (en) * 2020-01-14 2021-07-22 Google Llc Identification and handling of conditional procedure
CN115606240A (zh) * 2020-05-15 2023-01-13 苹果公司（Us） 用户装备触发的基于下层的切换
EP4154662A4 (en) * 2020-05-19 2024-05-08 Lenovo (Beijing) Limited METHOD AND DEVICE FOR WIRELESS COMMUNICATION
CN114071604B (zh) * 2020-08-05 2023-09-26 展讯通信（上海）有限公司 数据传输方法、设备、装置及存储介质
CN115412986B (zh) * 2022-09-01 2024-10-11 中国电信股份有限公司 基于终端指示的数据转发方法、系统、设备及存储介质

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018083649A1 (en) * 2016-11-04 2018-05-11 Telefonaktiebolaget Lm Ericsson (Publ) Identifying a beam for accessing a target cell of a wireless handover
WO2018132051A1 (en) * 2017-01-16 2018-07-19 Telefonaktiebolaget Lm Ericsson (Publ) Link switch in a wireless communication system
WO2018156696A1 (en) * 2017-02-27 2018-08-30 Intel IP Corporation Exit conditions for conditional handovers and beam based mobility state estimation
WO2018170777A1 (en) * 2017-03-22 2018-09-27 Motorola Mobility Llc A condition for handover
WO2018175819A1 (en) * 2017-03-23 2018-09-27 Intel IP Corporation Enhanced conditional handover

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104581843B (zh) * 2013-10-21 2018-07-03 宏达国际电子股份有限公司 用于无线通信系统的网络端的处理交递方法及其通信装置
CN104822169B (zh) * 2014-01-30 2019-01-25 上海诺基亚贝尔股份有限公司 用于为用户设备的切换提供服务的方法、基站和双连接系统
US10757621B2 (en) * 2017-03-22 2020-08-25 Ofinno, Llc Conditional handover execution
KR20180122935A (ko) * 2017-05-04 2018-11-14 삼성전자주식회사 UE autonomous handover에서의 measurement report/event 운용 및 네트워크 시그널링 방법

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018083649A1 (en) * 2016-11-04 2018-05-11 Telefonaktiebolaget Lm Ericsson (Publ) Identifying a beam for accessing a target cell of a wireless handover
WO2018132051A1 (en) * 2017-01-16 2018-07-19 Telefonaktiebolaget Lm Ericsson (Publ) Link switch in a wireless communication system
WO2018156696A1 (en) * 2017-02-27 2018-08-30 Intel IP Corporation Exit conditions for conditional handovers and beam based mobility state estimation
WO2018170777A1 (en) * 2017-03-22 2018-09-27 Motorola Mobility Llc A condition for handover
WO2018175819A1 (en) * 2017-03-23 2018-09-27 Intel IP Corporation Enhanced conditional handover

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021236001A1 (en) * 2020-05-21 2021-11-25 Telefonaktiebolaget Lm Ericsson (Publ) Methods and apparatuses for early data forwarding in conditional handover of a ue in multi-connectivity

Also Published As

Publication number Publication date
CN111132247B (zh) 2024-05-28
US11974175B2 (en) 2024-04-30
CN111132247A (zh) 2020-05-08
US20220038963A1 (en) 2022-02-03

Similar Documents

Publication Publication Date Title
WO2020088651A1 (zh) 切换控制方法以及通信装置
US10986549B2 (en) Handover method and device
WO2021159980A1 (zh) 切换的方法和通信装置
WO2018113661A1 (zh) 用户移动性方法和设备
JP7469392B2 (ja) 移動性管理の方法、端末および基地局
US11381994B2 (en) Method for delivering data packet, user equipment, and base station
WO2021008478A1 (zh) 信息上报方法及对应的用户设备
WO2018113655A1 (zh) 用户移动性方法和设备
US10764799B2 (en) Method and apparatus for minimizing interruption time of data transfer on handover in wireless communication network
WO2018205965A1 (zh) 小区切换方法、终端、基站设备和通信系统
EP3138357B1 (en) Method and apparatus for virtual base station migration in bbu pool
WO2021027931A1 (zh) 小区切换方法以及用户设备
WO2020151653A1 (zh) 由用户设备执行的切换方法以及用户设备
TWI444065B (zh) 設定次要細胞的方法及其通訊裝置
CN110868739B (zh) 由用户设备执行的方法、用户设备以及切换命令生成方法
WO2018228267A1 (zh) 无线协议层实体处理方法以及相应的用户设备
KR20170038760A (ko) SCG (Secondary Cell Group) 변경 절차 동안 SCell을 비활성화하는 방법 및 그 장치
KR20140118650A (ko) 이동통신 시스템에서 무선랜을 이용해서 트래픽을 오프 로드하는 방법 및 장치
JP2019522398A (ja) 非アクティブ使用に対するｒａｎにおけるｕｅコンテキストの格納
US20130089075A1 (en) Method for transceiving a signal to/from a mobile femtocell in a wireless communication system, and apparatus for same
WO2018027947A1 (zh) 一种数据处理方法以及相关设备
WO2022001495A1 (zh) 状态转换方法及链接态mtch的指示方法、装置、存储介质、终端、基站
WO2018059587A1 (zh) 数据发送、接收方法及装置、基站、终端
CN109845321B (zh) 切换期间的数据传输
KR20150128527A (ko) 다중 연결을 지원하는 이동 통신 시스템에서 PSCell과 SCell의 활성화 방법 및 장치

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 19877908

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 19877908

Country of ref document: EP

Kind code of ref document: A1