WO2018113661A1 - 用户移动性方法和设备 - Google Patents

用户移动性方法和设备 Download PDF

Info

Publication number
WO2018113661A1
WO2018113661A1 PCT/CN2017/117173 CN2017117173W WO2018113661A1 WO 2018113661 A1 WO2018113661 A1 WO 2018113661A1 CN 2017117173 W CN2017117173 W CN 2017117173W WO 2018113661 A1 WO2018113661 A1 WO 2018113661A1
Authority
WO
WIPO (PCT)
Prior art keywords
handover
configuration
condition
rrc message
timer
Prior art date
Application number
PCT/CN2017/117173
Other languages
English (en)
French (fr)
Inventor
常宁娟
山田升平
刘仁茂
Original Assignee
夏普株式会社
常宁娟
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, 常宁娟 filed Critical 夏普株式会社
Priority to US16/471,190 priority Critical patent/US11818620B2/en
Priority to EP17885333.9A priority patent/EP3562209B1/en
Publication of WO2018113661A1 publication Critical patent/WO2018113661A1/zh
Priority to US18/372,293 priority patent/US20240015626A1/en

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/16—Performing reselection for specific purposes
    • H04W36/18—Performing reselection for specific purposes for allowing seamless reselection, e.g. soft reselection
    • 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
    • H04W36/0058—Transmission of hand-off measurement information, e.g. measurement reports
    • 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
    • H04W36/0069—Transmission or use of information for re-establishing the radio link in case of dual connectivity, e.g. decoupled uplink/downlink
    • 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
    • H04W36/0072—Transmission or use of information for re-establishing the radio link of resource information of target access point
    • 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
    • H04W36/34—Reselection control
    • H04W36/36—Reselection control by user or terminal equipment
    • H04W36/362—Conditional handover
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/27—Transitions between radio resource control [RRC] states

Definitions

  • This application relates to the field of wireless communication technologies. More specifically, the present application relates to methods of inter-device communication as well as user equipment and base stations.
  • NTT DOCOMO proposed a new research project on 5G technology standards (see Non-patent literature: RP-160671) :New SID Proposal: Study on New Radio Access Technology), and approved.
  • the goal of the research project is to develop a new wireless (New Radio: NR) access technology to meet all 5G application scenarios, requirements and deployment environments.
  • NR mainly has three application scenarios: Enhanced Mobile Broadband (eMBB), Massive Machine Type Communication (mMTC) and Ultra Reliable and Low Latency Communications (URLLC).
  • eMBB Enhanced Mobile Broadband
  • mMTC Massive Machine Type Communication
  • URLLC Ultra Reliable and Low Latency Communications
  • the standardization of NR is carried out in two phases: the first phase of standardization will be completed in mid-2018; the second phase of standardization will be completed by the end of 2019.
  • the first-stage standard specification is forward-compatible with the second-stage standard specification, while the second-stage standard specification is based on the first-stage standard specification and meets all the requirements of the 5G NR technical standard.
  • Phase 1 The base station sends a measurement configuration to the user equipment (User Equipment, UE); the UE performs measurement based on the measurement configuration, and when the configured reporting condition is met, the UE sends a measurement report to the base station.
  • the base station determines whether it is necessary to switch the UE in combination with the received measurement report and other factors such as the base station load.
  • Phase 2 If the handover is decided, the source base station triggers the handover preparation process to send a handover request message to the target base station; the target base station according to the context of the UE in the handover request message and the resources of the target base station, etc.
  • the factor determines whether to accept the UE, and if yes, feeds back a handover confirmation message to the source base station, where the handover confirmation message includes a handover command.
  • Phase 3 The source base station sends a handover command to the UE, and starts data forwarding to the target base station.
  • the UE that receives the handover command immediately executes the handover command and accesses the target base station.
  • Phase 3 After confirming that the UE successfully accesses, the target base station sends a handover complete message to the source base station.
  • the handover procedure in the LTE system may cause the interruption of data transmission.
  • the optimization of the handover procedure is aimed at reducing the handover delay and overhead.
  • conditional switching In the conditional handover, a relatively conservative measurement report threshold is set, so that the base station acquires the measurement result in advance, and performs a handover preparation process according to the measurement result and the selected target base station, so that the base station can advance the handover command before the true handover condition is met. It is sent to the UE, which carries the conditions for handover execution.
  • the UE After receiving the handover command, the UE does not perform the handover immediately, but performs detection according to the handover condition carried in the handover command message. When the handover condition is met, The UE starts to execute a handover command and accesses the target cell.
  • LTE Long Term Evolution
  • a method performed by a user equipment UE comprising: receiving, from a base station, a first radio resource control RRC message including a handover command; saving a handover configuration included in the first RRC message; The switching configuration is managed.
  • managing the handover configuration includes starting a timer for switching configuration management.
  • the timer is only started when the first RRC message contains a configuration related to the timer.
  • the first RRC message includes a first condition
  • the method further includes: performing a handover procedure when the first condition is met.
  • the method further comprises: stopping the timer when the handover procedure begins to be performed, or when the second RRC message is received and the UE saves the handover configuration received from the first RRC message.
  • the method further comprises determining that the timer expires when the handover procedure begins to be performed, or when the second RRC message is received and the UE saves the handover configuration received from the first RRC message.
  • the method further comprises releasing the saved handover configuration received from the first RRC message when the timer is stopped or timed out.
  • the timer related configuration includes a value of a timer.
  • the first RRC message includes a second condition
  • managing the handover configuration includes releasing the saved handover configuration when the second condition is met.
  • the second condition comprises measuring an event.
  • a user equipment UE comprising: a receiving unit configured to receive a first radio resource control RRC message including a handover command from a base station; and a storage unit configured to save the first RRC message A switching configuration included in the management unit; and a management unit configured to manage the switching configuration.
  • the management unit is configured to initiate a timer for switching configuration management.
  • the management unit is configured to start the timer only if the first RRC message includes a configuration related to the timer.
  • the first RRC message includes a first condition
  • the UE further includes: a switching unit configured to perform a handover procedure when the first condition is met.
  • the management unit is configured to stop the timing when the handover procedure begins to be performed, or when the second RRC message is received and the UE saves the handover configuration received from the first RRC message Device.
  • the management unit is configured to: when the handover procedure begins to be performed, or when the second RRC message is received and the UE saves the handover received from the first RRC message When configured, the timer is determined to time out.
  • the management unit is configured to release the saved handover configuration received from the first RRC message when the timer is stopped or timed out.
  • the timer related configuration includes a value of a timer.
  • the first RRC message includes a second condition
  • the management unit is configured to release the saved handover configuration when the second condition is met.
  • the second condition comprises measuring an event.
  • a method performed by a base station comprising: transmitting, to a user equipment UE, a first radio resource control RRC message including a handover command, the RRC message including a handover condition; and when the handover is satisfied When the condition is met, the corresponding switching is stopped.
  • the switching condition includes a timer configuration. When the timer expires, the corresponding switch is stopped.
  • the switching condition includes a second condition for determining whether the switching command is valid.
  • the second condition indicates that the switching command is invalid, the corresponding switching is stopped or canceled.
  • the method further comprises receiving a handover confirmation message from the target cell.
  • the handover command includes first condition related information.
  • the UE starts performing handover.
  • the handover confirmation message message includes an X2/Xn message.
  • a base station including: a sending unit, configured to send, to a user equipment UE, a first radio resource control RRC message including a handover command, where the RRC message includes a handover condition; and
  • the management unit is configured to stop performing the corresponding handover when the handover condition is satisfied.
  • the switching condition includes a timer configuration.
  • the handover management unit is configured to stop the corresponding handover when the timer expires.
  • the switching condition includes a second condition for determining whether the switching command is valid.
  • the handover management unit is configured to stop or cancel the corresponding handover when the second condition indicates that the handover command is invalid.
  • the base station further comprises: a receiving unit configured to receive a handover confirm message from the target cell.
  • the handover command includes first condition related information.
  • the UE starts performing handover.
  • the handover confirmation message message includes an X2/Xn message.
  • the data transmission interruption time in the handover process in the NR can be further reduced, and the UE can reasonably manage the switched configuration information, avoid unnecessary erroneous handover, and the signaling overhead caused thereby. And business disruption.
  • the application is not limited to the NR system, and is also applicable to other LTE systems such as Release 15 and later. Furthermore, the present application is also not limited to the condition switching method, and is equally applicable to other switching methods.
  • FIG. 1 is a flow chart showing a method performed by a user equipment in accordance with one embodiment of the present application.
  • FIG. 2 is a block diagram showing a user equipment in accordance with one embodiment of the present application.
  • FIG. 3 is a schematic diagram showing an exemplary format of a MAC CE.
  • FIG. 4 is a schematic diagram showing an example format of a MAC subheader.
  • FIG. 5 is a block diagram showing a base station according to an embodiment of the present application.
  • the present application is described by taking an Evolved Universal Terrestrial Radio Access Network (E-UTRAN), an NR, a corresponding core network, and a next-generation core network as an example. It should be noted that the application is not limited to this application.
  • the E-UTRAN, NR, and corresponding core network and next-generation core network may also be used in other wireless communication systems of evolution, such as a 6G wireless communication system, or may be applicable to other deployment scenarios such as dual-connection/multi-connection scenarios. under.
  • the definition and naming manners of the base station, the cell, the source base station, the source cell, the target base station, and the target cell may be different in different deployment scenarios or in different wireless communication systems, and the application may be equally applicable to these uses.
  • the radio protocol layer also includes a Radio Resource Control (RRC) layer, a Packet Data Coverage Protocol (PDCP) layer, All or part of the functions provided by the Radio Link Control (RLC) layer and the Medium Access Control (MAC) layer. It may also include the PDCP layer, the RLC layer, and the MAC layer that do not provide other functions, such as a Bean management function.
  • RRC Radio Resource Control
  • PDCP Packet Data Coverage Protocol
  • RLC Radio Link Control
  • MAC Medium Access Control
  • Each protocol layer described in this application includes all equal wireless protocol layer concepts applicable to E-UTRAN, NR, and other systems in the RRC, PDCP, RLC, or MAC layers.
  • the source cell may also be referred to as a source base station, or may be a source beam (beam), a source transmission point (TRP), a target cell may also be referred to as a target base station, or may be a target beam, target transmission. point.
  • the source cell refers to a base station serving the UE before the handover process is performed or a cell serving the UE or the UE camped before the cell reselection occurs.
  • the target cell refers to the base station serving the UE after the handover process is performed, or is a handover command. The cell indicated in the cell; or the cell serving the UE or the UE camping after the cell reselection occurs.
  • the UE before receiving the RRC message including the handover command, the UE still maintains communication with the source base station including data transmission before performing handover, to further reduce the time of data transmission interruption.
  • FIG. 1 is a flow chart showing a method performed by a user equipment in accordance with one embodiment of the present application. As shown in Figure 1, the method includes the following steps:
  • Step S110 The method starts from here.
  • Step S120 Receive a first radio resource control RRC message including a handover command from the base station.
  • Step S130 Save the handover configuration included in the first RRC message.
  • Step S140 Manage the switching configuration.
  • a timer for switching configuration management can be started to perform management. Further, the timer may be started when the first RRC message includes a configuration related to the timer. For example, the configuration related to the timer includes the value of the timer.
  • the timer is stopped when the handover procedure begins to be performed, or when the second RRC message is received and the UE holds the handover configuration received from the first RRC message.
  • the timer is determined to time out when the handover procedure begins to be performed, or when the second RRC message is received and the UE holds the handover configuration received from the first RRC message.
  • the saved handover configuration received from the first RRC message is released when the timer is stopped or timed out.
  • the first RRC message may include the first condition
  • the method further includes: performing the handover procedure when the first condition is met.
  • the first RRC message may include a second condition
  • managing the handover configuration may include releasing the saved handover configuration when the second condition is met.
  • the second condition can include measuring an event.
  • Step S150 The method ends here.
  • the UE 200 includes a receiving unit 210, a storage unit 220, a management unit 230, and optionally a switching unit 240.
  • the UE 200 may also include other functional units necessary to implement its functions, such as various processors, memories, radio frequency signal processing units, baseband signal processing units, and other units.
  • a detailed description of these well-known elements has been omitted for the sake of brevity.
  • the receiving unit 210 is configured to receive a first radio resource control RRC message including a handover command from the base station.
  • the storage unit 220 is configured to save the handover configuration included in the first RRC message.
  • Management unit 230 is configured to manage the handover configuration.
  • the management unit 230 can be configured to: start a timer for switching configuration management.
  • the management unit 230 can be configured to start the timer only when the first RRC message contains a configuration related to the timer.
  • the configuration related to the timer may include the value of the timer.
  • the management unit 230 may be configured to stop the timer when the handover procedure is started, or when the second RRC message is received and the UE saves the handover configuration received from the first RRC message.
  • the management unit 230 may be configured to: when the handover procedure starts to be performed, or when the second RRC message is received and the UE saves the handover configuration received from the first RRC message, the timer is determined to time out .
  • the management unit 230 may be configured to release the saved handover configuration received from the first RRC message when the timer is stopped or timed out.
  • the switching unit 240 may be configured to: include when the first RRC message is satisfied When the first condition is met, the switching process is performed.
  • the management unit 230 may be configured to release the saved switching configuration when the second condition included in the first RRC message is satisfied.
  • the second condition can include measuring an event.
  • FIG. 5 is a block diagram showing a base station according to an embodiment of the present application.
  • the base station 500 includes a transmitting unit 510 and a handover management unit 520, and optionally a receiving unit 530.
  • base station 500 may also include other functional units necessary to carry out its functions, such as various processors, memories, radio frequency signal processing units, baseband signal processing units, and other units.
  • processors such as various processors, memories, radio frequency signal processing units, baseband signal processing units, and other units.
  • baseband signal processing units such as various processors, memories, radio frequency signal processing units, baseband signal processing units, and other units.
  • a detailed description of these well-known elements has been omitted for the sake of brevity.
  • the sending unit 510 is configured to send a first radio resource control RRC message including a handover command to the user equipment UE, where the RRC message includes a handover condition.
  • the handover command further includes first condition related information, and when the first condition is satisfied, the UE starts performing handover.
  • the handover management unit 520 is configured to stop performing the corresponding handover when the handover condition is satisfied.
  • the handover condition may include a timer configuration.
  • the handover management unit 520 is configured to stop the corresponding handover when the timer expires.
  • the switching condition may include a second condition for determining whether the switching command is valid.
  • the handover management unit 520 is configured to stop or cancel the corresponding handover when the second condition indicates that the handover command is invalid.
  • the receiving unit 530 is configured to receive a handover confirm message from the target cell.
  • the handover confirmation message may include an X2/Xn message.
  • Embodiment 1 Timer-based switching configuration information management method
  • the UE side manages the received handover configuration information based on a timer.
  • the timer when the timer is running, the UE considers that the received or stored handover configuration is valid; when the timer is not running, If the timeout or stop occurs, the UE considers that the received or stored handover configuration is invalid, or the UE releases/clears/discards the received or stored handover configuration information.
  • This timer can be called a validity timer. Specifically, the implementation method in this embodiment will be described.
  • the UE or the UE RRC layer may perform the following operations:
  • the timer is used to switch configuration management.
  • the handover configuration includes all or part of the configuration in the RRC message including the handover command; or alternatively, the handover configuration includes a configuration in the handover command. .
  • the handover configuration may also be expressed as a handover command.
  • the handover command includes mobile control information (such as cell identifier, cell frequency, and random access information) of the target cell, system information, radio resource configuration, measurement configuration, security information, and secondary cell of the UE in the target cell.
  • mobile control information such as cell identifier, cell frequency, and random access information
  • the UE or the UE RRC performs the operation 1 when receiving the first RRC message including the handover command, and the timer configuration is included in the message.
  • the handover is a conditional handover, that is, the handover command includes first condition related information, and when the first condition is met, the UE starts to perform a handover procedure.
  • the first condition may be a measurement event.
  • the first condition may be that the neighboring cell exceeds a threshold value of the serving cell signal quality for a period of time, and the neighboring cell corresponds to the target cell of the handover.
  • the UE or the UE RRC stops the validity.
  • the timer, or UE or UE RRC considers the validity timer to time out.
  • the UE releases the saved handover configuration received from the first RRC message.
  • release can also be expressed as “discard”, “clear”, and the like.
  • the UE RRC layer downlevel indication cancels the transmission of the handover indication (see Embodiment 15 to Embodiment 17 below).
  • the second RRC message is used to release the RRC connection, or is used to indicate that the UE enters an inactive state, or is used to indicate that the UE suspends the RRC connection (RRC suspend). Further, the second RRC message may be an RRC Connection Reconfiguration message or an RRC Connection Release message.
  • the inactive state herein refers to a state between the RRC connected state and the RRC idle state, and the state has not been completely named in the NR, and may sometimes be called new state.
  • the state may be an independent RRC state, or may be a sub-state of RRC connected or RRC idle, and this state in LTE or E-UTRAN may also be referred to as light connected. Other forms of commands and definitions of this state are within the scope of this application for the purposes of this application.
  • the validity timer is configured by the base station by using an RRC message, such as a first RRC message including a handover command, where the configuration of the validity timer includes a value of a timer.
  • the configuration of the validity timer may be configured by the source cell or configured by the target cell.
  • the validity timer and/or its configuration may be to distinguish each handover command or distinguish each target cell, or the effective The sex timer is used to distinguish the handover command or distinguish the target cell, and the value is a common value shared by all the handover commands or the target cell.
  • the foregoing solution in this embodiment may also be performed by distinguishing the target cell or distinguishing the handover command.
  • the above method in this embodiment is also applicable to non-handover scenarios such as UE-based mobility, etc., and further, such as cell reselection.
  • the following embodiments are described in connection with UE-based mobility.
  • the UE receives a cell reselection configuration sent by the base station, where the cell reselection parameter is received through dedicated signaling, such as an RRC connection release message, an RRC connection reconfiguration message, and the like.
  • the UE performs cell reselection according to the received cell reselection configuration.
  • the cell reselection occurs in an RRC idle state or an RRC inactive state.
  • the UE manages the received cell reselection configuration based on the validity timer.
  • the validity timer may be configured by using broadcast signaling or by dedicated signaling. Further, it may be included in the cell reselection configuration to be configured together with the UE by dedicated signaling and cell reselection configuration.
  • the cell reselection configuration includes configuration information for cell reselection such as preferred cell information, reselection frequency priority, reselection cell priority, and the like.
  • the UE reselecting the received cell based on the validity timer management includes: when the timer is running, the UE considers that the security is guaranteed The saved cell reselection configuration is valid. If the timer is not running, such as stopping or timeout, the UE considers that the saved cell reselection configuration is invalid, and/or the UE deletes the saved cell reselection configuration.
  • the cell reselection configuration is used for UE-based mobility, and further, for cell reselection, and the naming may also be other naming such as idle state mobility control information or inactive state mobility control information.
  • the UE or the UE RRC layer when receiving the cell reselection configuration message sent by the base station, performs the following operations:
  • the timer is used for cell reselection configuration management.
  • the UE or the UE RRC performs the operation 1 when receiving the cell reselection configuration and the timer configuration is included in the message.
  • the UE or the UE RRC stops the validity timer, or the UE or the UE RRC considers that the validity timer expires. .
  • the UE releases the saved cell reselection configuration.
  • release can also be expressed as “discard”, “clear”, and the like.
  • the UE may release the saved cell reselection configuration without relying on the validity timer, that is, when the UE enters an RRC connected state, or when the UE enters an RRC idle state, or a location area update occurs.
  • Embodiment 2 Condition-based switching configuration information management method
  • the UE side manages the received handover configuration according to some conditions.
  • the condition is not met, the UE or the UE RRC considers that the received or saved handover configuration is valid.
  • the condition is met, the UE or the UE RRC considers that the received handover configuration is invalid, or the UE or the UE RRC releases the received or The saved switch configuration.
  • release can also be expressed as “clear”, “discard” and the like.
  • Step 1 When receiving the first RRC message including the handover command sent by the source base station, the behavior performed by the UE or the UE RRC layer includes: saving the received handover configuration.
  • the handover configuration includes all or part of the configuration in the RRC message including the handover command; or alternatively, the handover configuration includes a configuration in the handover command.
  • the handover is a conditional handover, that is, the handover command includes first condition related information, and when the first condition is met, the UE starts to perform a handover procedure.
  • the first condition may be a measurement event, for example, the first condition may be that the neighboring cell exceeds a threshold value of the serving cell signal quality for a period of time.
  • the neighboring cell corresponds to a target cell of the handover.
  • the handover command includes mobile control information (such as cell identifier, cell frequency, and random access information) of the target cell, system information, radio resource configuration, measurement configuration, security information, and secondary cell of the UE in the target cell.
  • mobile control information such as cell identifier, cell frequency, and random access information
  • Step 2 When the second condition is met, the UE or the UE RRC performs the following operations:
  • the second condition is configured by the eNB by using the RRC message
  • the RRC message may be a system message or a dedicated RRC message, such as an RRC connection reconfiguration, and may further be a first RRC message including a handover command.
  • the second condition may be configured by the target cell, or may be configured by the source cell.
  • the second condition may be any combination of one or more of the following events, but is not limited to the following events:
  • Event 1 The serving cell signal quality measurement value is greater than a threshold value
  • Event 2 the neighbor cell signal quality measurement value is less than a threshold value
  • Event 3 The signal quality measurement value of the serving cell is greater than a threshold value of the signal quality measurement value of the neighboring cell;
  • Event 4 The serving cell signal quality measurement value is greater than one threshold value and the neighbor cell signal quality measurement value is less than another threshold value.
  • the neighboring cell in the above event refers to the corresponding target cell in the handover command.
  • the serving cell and the target cell may be different radio access technologies (Radio Access). Technology, RAT).
  • the configuration of the second condition or event may be based on a configuration of a measurement event in LTE. For example, when the second condition is configured as event 3, where the threshold is configured as th and the time duration (TTT) value is configured as duration, the UE detects the source cell and the target cell signal quality, and when the source cell signal is used. When the quality measurement value is greater than the difference between the neighboring cell signal quality measurement values and greater than or equal to th, and the duration time is continued, the UE considers that the second condition is satisfied.
  • TTTT time duration
  • This embodiment is equally applicable to scenarios that support multiple handover commands or multiple handover destination cells.
  • the foregoing operations in this embodiment are performed by distinguishing between handover commands or handover target cells.
  • the configuration of the second condition may be configured for each handover target cell, or may be shared by all handover target cells.
  • the UE operation when the second condition corresponding to a handover target cell is satisfied, The UE performs corresponding operations only on the handover configuration corresponding to the corresponding handover target cell.
  • Embodiment 3 handover configuration management method based on base station control
  • the UE manages the received or saved handover configuration in accordance with an indication from the base station. That is, when the UE receives the handover command, the UE considers that the corresponding handover configuration is valid. When the UE receives the invalid indication sent by the base station, the UE considers that the corresponding received or saved handover configuration is invalid, or the UE releases the location. Received or saved switch configuration.
  • Step 1 When receiving the first RRC message including the handover command sent by the source base station, the behavior performed by the UE or the UE RRC layer includes: saving the received handover configuration.
  • the handover configuration includes all or part of the configuration in the RRC message including the handover command; or alternatively, the handover configuration includes a configuration in the handover command.
  • the handover is a conditional handover, that is, the handover command includes first condition related information, and when the first condition is met, the UE starts to perform a handover procedure.
  • the first condition may be a measurement event, for example, the first condition may be that the neighboring cell exceeds a threshold value of the serving cell signal quality for a period of time.
  • the neighboring cell corresponds to a target cell of the handover.
  • the handover command includes mobile control information (such as cell identifier, cell frequency, and random access information) of the target cell, system information, radio resource configuration, measurement configuration, security information, and secondary cell of the UE in the target cell.
  • mobile control information such as cell identifier, cell frequency, and random access information
  • Step 2 Receive indication information sent by the base station.
  • the indication information is used to instruct the UE to cancel the corresponding handover. It may be included in the RRC message or it may be MAC signaling.
  • Step 3 If the received message includes the indication information described in step 2, the UE:
  • the method further includes the UE reporting a measurement report to the base station.
  • the above operation is performed by distinguishing the target cell.
  • the indication information sent by the base station may further include a target cell identifier or include an identifier that can be used to associate with a handover command or a target cell.
  • the method is described in step 3. The operation is performed only for the handover command associated with the indication information or the handover configuration corresponding to the target cell.
  • the UE determines whether the indication information sent by the base station includes the target cell identifier or does not include an identifier that can be used to associate with a handover command or a target cell. If the indication information sent by the base station does not include the target cell identifier or does not include an identifier that can be used to associate with a handover command or a target cell, the UE The handover command or the handover configuration corresponding to all target cells performs the operations in step 3.
  • Step 1 When receiving the first RRC message including the handover command sent by the source base station, the behavior performed by the UE or the UE RRC layer includes: saving the received handover configuration.
  • the handover configuration includes all or part of the configuration in the RRC message including the handover command; or alternatively, the handover configuration includes a configuration in the handover command.
  • the handover is a conditional handover, that is, the handover command includes first condition related information, and when the first condition is met, the UE starts to perform a handover procedure.
  • the handover command includes mobile control information (such as cell identifier, cell frequency, and random access information) of the target cell, system information, radio resource configuration, measurement configuration, security information, and secondary cell of the UE in the target cell.
  • mobile control information such as cell identifier, cell frequency, and random access information
  • Step 2 When it is detected that a Radio Link Failure (RLF) occurs, the UE or the UE RRC layer performs the following operations:
  • This embodiment is also applicable to multiple handover commands or multiple handover target cell scenarios.
  • Step 1 When receiving the first RRC message including the handover command sent by the source base station, the behavior performed by the UE or the UE RRC layer includes: saving the received handover configuration.
  • the handover configuration includes all or part of the configuration in the RRC message including the handover command; or alternatively, the handover configuration includes a configuration in the handover command.
  • the handover is a conditional handover, that is, the handover command includes first condition related information, and when the first condition is met, the UE starts to perform a handover procedure.
  • the first condition may be a measurement event, for example, the first condition may be that the neighboring cell exceeds a threshold value of the serving cell signal quality for a period of time.
  • the neighboring cell corresponds to a target cell of the handover.
  • the handover command includes mobile control information (such as cell identifier, cell frequency, and random access information) of the target cell, system information, radio resource configuration, measurement configuration, security information, and secondary cell of the UE in the target cell.
  • mobile control information such as cell identifier, cell frequency, and random access information
  • Step 2 When the UE starts the handover procedure, or receives the second RRC message and the saved handover configuration is available on the UE, the UE or the UE RRC layer performs the following operations:
  • the second RRC message is used to release the RRC connection, or is used to indicate that the UE enters an inactive state, or is used to indicate that the UE suspends the RRC connection (RRC suspend). Further, the second RRC message may be an RRC Connection Reconfiguration message or an RRC Connection Release message.
  • the inactive state herein refers to a state between the RRC connected state and the RRC idle state, and the state has not been completely named in the NR, and may sometimes be called new state. State can be an independent RRC state, or it can be A sub-state of RRC connected or RRC idle, for the purposes of this application, other forms of commands and definitions for this state are within the scope of this application.
  • This embodiment is equally applicable to scenarios that support multiple handover commands or multiple handover destination cells.
  • the foregoing operations in this embodiment are performed by distinguishing between handover commands or handover target cells.
  • the configuration of the second condition may be configured for each handover target cell, or may be shared by all handover target cells.
  • the UE operation when the second condition corresponding to a handover target cell is satisfied, The UE performs corresponding operations only on the handover configuration corresponding to the corresponding handover target cell.
  • Step 1 When receiving the first RRC message including the handover command sent by the source base station, the behavior performed by the UE or the UE RRC layer includes: saving the received handover configuration.
  • the handover configuration includes all or part of the configuration in the RRC message including the handover command; or alternatively, the handover configuration includes a configuration in the handover command.
  • the handover is a conditional handover, that is, the handover command includes first condition related information, and when the first condition is met, the UE starts to perform a handover procedure.
  • the first condition may be a measurement event, for example, the first condition may be that the neighboring cell exceeds a threshold value of the serving cell signal quality for a period of time.
  • the neighboring cell corresponds to a target cell of the handover.
  • the handover command includes mobile control information (such as cell identifier, cell frequency, and random access information) of the target cell, system information, radio resource configuration, measurement configuration, security information, and secondary cell of the UE in the target cell.
  • mobile control information such as cell identifier, cell frequency, and random access information
  • Step 2 When the UE receives another first RRC message including the handover command and the saved handover configuration is configured on the UE, the UE or the UE RRC layer performs the following operations:
  • the UE operation in this step may also be: replacing the saved handover configuration with the handover configuration in the received further first RRC message.
  • Step 1 When receiving the first RRC message including the handover command sent by the source base station, the behavior performed by the UE or the UE RRC layer includes: saving the received handover configuration.
  • the handover configuration includes all or part of the configuration in the RRC message including the handover command; or alternatively, the handover configuration includes a configuration in the handover command.
  • the handover is a conditional handover, that is, the handover command includes first condition related information, and when the first condition is met, the UE starts to perform a handover procedure.
  • the first condition may be a measurement event, for example, the first condition may be that the neighboring cell exceeds a threshold value of the serving cell signal quality for a period of time.
  • the neighboring cell corresponds to a target cell of the handover.
  • the handover command includes mobile control information (such as cell identifier, cell frequency, and random access information) of the target cell, system information, radio resource configuration, measurement configuration, security information, and secondary cell of the UE in the target cell.
  • mobile control information such as cell identifier, cell frequency, and random access information
  • Step 2 When the UE handover succeeds, the UE or the UE RRC layer performs the following operations:
  • the UE handover success may be that the UE sends a handover complete message, that is, an RRC connection reconfiguration complete message to the target cell (successfully).
  • Embodiment 8 Management method of handover configuration by base station side
  • this embodiment is implemented on the source base station in handover.
  • it can be implemented by the base station shown in FIG.
  • Step 1 The RRC message is sent to the UE, where the RRC message includes the configuration of the validity timer.
  • the RRC message may be a first RRC message including a handover command.
  • the validity timer is used to manage the handover configuration.
  • the RRC message can be sent to the UE through the sending unit 510 in the base station 500 shown in FIG.
  • the handover configuration includes all or part of the configuration in the RRC message including the handover command; or alternatively, the handover configuration includes a configuration in the handover command.
  • the handover is a conditional handover, that is, the handover command includes first condition related information, and when the first condition is met, the UE starts to perform a handover procedure.
  • the first condition may be a measurement event, for example, the first condition may be that the neighboring cell exceeds a threshold value of the serving cell signal quality for a period of time.
  • the neighboring cell corresponds to a target cell of the handover.
  • the handover command includes mobile control information (such as cell identifier, cell frequency, and random access information) of the target cell, system information, radio resource configuration, measurement configuration, security information, and secondary cell of the UE in the target cell.
  • mobile control information such as cell identifier, cell frequency, and random access information
  • step 2 when the timer expires, stop or cancel the corresponding handover.
  • the corresponding handover can be stopped or canceled by the handover management unit 520 in the base station 500 shown in FIG.
  • this embodiment can be applied to multiple handover target cell scenarios of multiple handover commands.
  • the validity timer and/or its value may be shared by multiple handover commands or multiple target cells, or may be differentiated for each handover command or target cell configuration.
  • the configuration and the steps in this embodiment are both to distinguish the handover command or the target cell, that is, to perform related operations only on the corresponding target cell or the associated target cell.
  • the method further includes: receiving, from the target cell, a handover acknowledgement message, where the handover acknowledgement message includes a configuration of a validity timer, where the message is an X2/Xn message, and the X2/Xn is a base station and
  • the interface between the base stations can also be other names. That is, in this case, the timer is configured by the target cell.
  • a handover confirmation message can be received from the target cell through the receiving unit 530 in the base station 500 shown in FIG.
  • the foregoing method in this embodiment is also applicable to a non-handover scenario, such as UE-based mobility, etc., and further, such as cell reselection.
  • UE-based mobility such as UE-based mobility, etc.
  • cell reselection such as cell reselection
  • the cell reselection configuration sent by the base station to the UE where the cell reselection parameter occurs by using dedicated signaling, such as an RRC connection release message, an RRC connection reconfiguration message, and the like.
  • the UE performs cell reselection according to the received cell reselection configuration.
  • the cell reselection occurs in an RRC idle state or an RRC inactive state.
  • the UE manages the received cell reselection configuration based on the validity timer.
  • the validity timer may be through broadcast signaling or through a dedicated message.
  • the configuration, and further, may be included in the cell reselection configuration to be configured together with the UE by dedicated signaling and cell reselection configuration.
  • the cell reselection configuration is used for UE-based mobility, and further, for cell reselection, and the naming may also be other naming such as idle state mobility control information or inactive state mobility control information.
  • this embodiment is implemented on the source base station in handover.
  • it can be implemented by the base station shown in FIG.
  • Step 1 The RRC message is sent to the UE, where the RRC message includes the configuration of the second condition.
  • the RRC message may be a first RRC message including a handover command.
  • the second condition is used to determine whether the handover configuration is valid, or is used to determine whether to release the handover configuration.
  • the RRC message can be sent to the UE through the sending unit 510 in the base station 500 shown in FIG.
  • the handover is a conditional handover, that is, the handover command includes first condition related information, and when the first condition is met, the UE starts to perform a handover procedure.
  • the handover configuration includes all or part of the configuration in the RRC message including the handover command; or alternatively, the handover configuration includes a configuration in the handover command.
  • the handover command includes mobile control information (such as cell identifier, cell frequency, and random access information) of the target cell, system information, radio resource configuration, measurement configuration, security information, and secondary cell of the UE in the target cell.
  • mobile control information such as cell identifier, cell frequency, and random access information
  • the embodiment includes step 2, and the base station stops or cancels the corresponding handover when the second condition is met.
  • the second condition satisfaction may be a determination made according to a measurement report of the UE.
  • the measurement report of the UE is a measurement report that the UE triggers and sends to the base station when the configured second condition is met.
  • this embodiment can be applied to multiple handover target cell scenarios of multiple handover commands.
  • the configuration of the second condition may be shared by multiple handover commands or multiple target cells, or may be differentiated for each handover command or target cell configuration.
  • the configuration and the steps in this embodiment are both to distinguish the handover command or the target cell, that is, to perform related operations only on the corresponding target cell or the associated target cell.
  • the method further includes receiving, by the target cell, a handover acknowledgement message, where the handover acknowledgement message includes a configuration of the second condition, where the message is an X2/Xn message, and the X2/Xn is a base station and a base station.
  • the interface between them can also be other names. That is, in this case, the second condition is configured by the target cell.
  • a handover confirmation message can be received from the target cell through the receiving unit 530 in the base station 500 shown in FIG.
  • this embodiment is implemented on the source base station in handover.
  • Step 1 Send the indication information to the UE.
  • the indication information is used to instruct the UE to cancel the corresponding handover. It may be included in the RRC message or it may be MAC signaling. In another representation, the UE information is used to instruct the UE to release the corresponding handover configuration.
  • the handover is a conditional handover, that is, the handover command includes first condition related information, and when the first condition is met, the UE starts to perform a handover procedure.
  • the first condition may be a measurement event, for example, the first condition may be that the neighboring cell exceeds a threshold value of the serving cell signal quality for a period of time.
  • the neighboring cell corresponds to a target cell of the handover.
  • the handover configuration includes all or part of the configuration in the RRC message including the handover command; or alternatively, the handover configuration includes a configuration in the handover command.
  • the handover command includes mobile control information (such as cell identifier, cell frequency, and random access information) of the target cell, system information, radio resource configuration, measurement configuration, security information, and secondary cell of the UE in the target cell.
  • mobile control information such as cell identifier, cell frequency, and random access information
  • the method further includes receiving a measurement report reported by the UE.
  • the method further includes the step 2 of receiving the response message/signaling sent by the UE.
  • the indication information sent by the base station may further include a target cell identifier or include an identifier that can be used to associate with a handover command or a target cell.
  • the following embodiments are provided to illustrate a method of managing handover configuration at the base station side, which is performed on a target base station in handover. For example, it can be implemented by the base station shown in FIG.
  • this embodiment is implemented on the target base station in handover.
  • Step 1 Send a handover acknowledgement message to the source base station, where the handover acknowledgement message includes a configuration of a validity timer, the message is an X2/Xn message, and X2/Xn is an interface between the base station and the base station, and may also be Is another name. That is, in this case, the timer is configured by the target cell. Optionally, it may be included in the inter-node RRC message in the handover confirmation message (inter-node RRC).
  • the validity timer is used to manage the handover configuration. For example, a handover confirm message may be transmitted to the source base station through the transmitting unit 510 in the base station 500 shown in FIG.
  • the handover configuration includes all or part of the configuration in the RRC message including the handover command; or alternatively, the handover configuration includes a configuration in the handover command.
  • the handover is a conditional handover, that is, the handover command includes first condition related information, and when the first condition is met, the UE starts to perform a handover procedure.
  • the first condition may be a measurement event, for example, the first condition may be that the neighboring cell exceeds a threshold value of the serving cell signal quality for a period of time.
  • the neighboring cell corresponds to a target cell of the handover.
  • the handover command includes mobile control information (such as cell identifier, cell frequency, and random access information) of the target cell, system information, radio resource configuration, measurement configuration, security information, and secondary cell of the UE in the target cell.
  • mobile control information such as cell identifier, cell frequency, and random access information
  • step 2 when the timer expires, stop or cancel the corresponding handover.
  • the corresponding handover can be stopped or canceled by the handover management unit 520 in the base station 500 shown in FIG.
  • the method further includes receiving a handover request message sent by the source base station.
  • this embodiment can be applied to multiple handover target cell scenarios of multiple handover commands.
  • the validity timer and/or its value may be shared by multiple handover commands or multiple target cells, or may be differentiated for each handover command or target cell configuration.
  • the configuration and the steps in this embodiment are both to distinguish the handover command or the target cell, that is, to perform related operations only on the corresponding target cell or the associated target cell.
  • this embodiment is implemented on the target base station in handover.
  • Step 1 Send a handover acknowledgement message to the source base station, where the handover acknowledgement message includes a configuration of the second condition, the message is an X2/Xn message, and X2/Xn is an interface between the base station and the base station, or may be Other naming. That is, in this case, the second condition is configured by the target cell.
  • the configuration of the second condition may include an inter-node RRC message in the handover confirmation message. The second condition is used to determine whether the handover configuration is valid, or is used to determine whether to release the handover configuration.
  • the handover is a conditional handover, that is, the handover command includes first condition related information, and when the first condition is met, the UE starts to perform a handover procedure.
  • the first condition may be a measurement event, for example, the first condition may be that the neighboring cell exceeds a threshold value of the serving cell signal quality for a period of time.
  • the neighboring cell corresponds to a target cell of the handover.
  • the handover configuration includes all or part of the configuration in the RRC message including the handover command; or alternatively, the handover configuration includes a configuration in the handover command.
  • the handover command includes mobile control information (such as cell identifier, cell frequency, and random access information) of the target cell, system information, radio resource configuration, measurement configuration, security information, and secondary cell of the UE in the target cell.
  • mobile control information such as cell identifier, cell frequency, and random access information
  • the method further includes receiving a handover request message sent by the source base station.
  • this embodiment can be applied to multiple handover target cell scenarios of multiple handover commands.
  • the configuration of the second condition may be shared by multiple handover commands or multiple target cells, or may be differentiated for each handover command or target cell configuration.
  • the configuration and the steps in this embodiment are both to distinguish the handover command or the target cell, that is, to perform related operations only on the corresponding target cell or the associated target cell.
  • the following embodiment gives a method of condition switching capability indication/acquisition on an air interface.
  • the UE reports the capability information of the support conditional handover to the base station.
  • the conditional switching that is, the handover command includes first condition related information, and when the first condition is met, the UE starts to perform the handover procedure.
  • the first condition can be a measurement
  • the first condition may be that the neighboring cell exceeds a threshold value of the serving cell signal quality for a period of time.
  • the neighboring cell corresponds to a target cell of the handover.
  • the capability information of the UE supporting conditional handover may be included in a UEcapabilityinformation message. Or by other means, such as explicit or implicit indication in other RRC messages.
  • the format is as follows:
  • the base station determines whether to perform condition switching on the mobility of the UE according to the capability information of the UE.
  • the UE reports its ability to support UE mobility based to the base station.
  • the UE-based mobility may be cell reselection in an RRC connected state. It may also refer to conditional switching in the above RRC connected state.
  • the UE supporting UE mobility based capability information may be included in a UEcapabilityinformation message. Or by other means, such as explicit or implicit indication in other RRC messages.
  • the format is as follows:
  • the base station determines whether to perform UE-based mobility on the UE according to the foregoing capability information of the UE.
  • the following embodiment is used to explain the method of condition switching capability indication/acquisition on X2/Xn.
  • the first base station can indicate to the second base station whether it supports conditional handover.
  • the indication information is carried in the X2/Xn message, and may be, for example, an X2/Xn setup/eNB configuration update message.
  • X2/Xn is the interface between the base station and the base station, and may be other names in other systems.
  • the conditional handover that is, the handover command includes first condition related information, and when the first condition is met, the UE starts to perform the handover procedure.
  • the first condition can be a measurement event,
  • the first condition may be that the neighboring cell has a signal quality exceeding a threshold value of the serving cell for a period of time.
  • the neighboring cell corresponds to a target cell of the handover.
  • the source base station indicates to the target base station that the current handover is a conditional handover in the handover request message of the handover preparation process, and the indication information is carried in the X2/Xn message.
  • the target base station may perform configuration in a message such as a handover command or a handover response based on the indication, such as the timer described in Embodiment 1.
  • the target base station indicates to the source base station that the current handover is a conditional handover in the handover confirmation message of the handover preparation process, and the indication information is carried in the X2/Xn message.
  • the source base station may perform corresponding operations on the UE based on the indication, such as determining whether to maintain communication with the UE after the handover command is sent.
  • the following embodiments are used to explain a method of performing handover at the UE side.
  • Step 1 When receiving the first RRC message including the handover command sent by the source base station, the behavior performed by the UE or the UE RRC layer includes: saving the received handover configuration.
  • the handover is a conditional handover, that is, the handover command includes first condition related information, and when the first condition is met, the UE starts to perform a handover procedure.
  • the first condition may be a measurement event, for example, the first condition may be that the neighboring cell exceeds a threshold value of the serving cell signal quality for a period of time.
  • the neighboring cell corresponds to a target cell of the handover.
  • the handover configuration includes all or part of the configuration in the RRC message including the handover command; or alternatively, the handover configuration includes a configuration in the handover command.
  • the handover command includes mobile control information (such as cell identifier, cell frequency, and random access information) of the target cell, system information, radio resource configuration, measurement configuration, security information, and secondary cell of the UE in the target cell.
  • mobile control information such as cell identifier, cell frequency, and random access information
  • Step 2 When the first condition is met, the UE sends a handover indication to the base station, where the handover indication is used to inform the base station that the UE is to start performing handover, and may also be described as indicating that the handover indication is used to notify the base station that handover occurs, or is described as notifying the base station.
  • the first condition has been met.
  • Step 3 The UE performs handover, that is, the UE synchronizes and accesses the target cell. In this step, the UE applies the configuration in the saved handover command to access the target cell. This step is optional.
  • step 2A is further included, and the UE receives the response sent by the base station.
  • whether the UE can or needs to send the handover indication after the first condition is met is configured by the base station, that is, the base station enables or disables the transmission of the handover indication by using an RRC message, the RRC The message may be a system message or an RRC message containing a handover command.
  • Embodiments 16 to 19 give some descriptions. It should be noted that the implementation manner is not limited to those listed in Embodiment 16 to Embodiment 19. .
  • the manner in which the handover indication in step 2 in the embodiment 15 adopts MAC signaling that is, the handover indication is a MAC Control Element (CE).
  • CE MAC Control Element
  • the MAC layer described below may also be referred to as a MAC entity.
  • the UE RRC layer instructs the lower layer to send a handover indication to the base station.
  • the base station refers to the source base station.
  • the UEMAC layer when receiving an indication from the upper layer to send a handover indication, the UEMAC layer triggers a handover indicating the transmission of the MAC CE.
  • the handover indication MAC CE corresponds to a dedicated Logical Channel Identity (LCID).
  • LCID Logical Channel Identity
  • the content may include a 1 bit bit to indicate whether the UE is about to start handover to the target cell, or to inform the base station that the first condition has been met.
  • the content may include a cell identifier, used to indicate a target cell to which the UE is about to start handover, or a target cell used to indicate that the UE is triggered to start handover, or as a target that has met the first condition. Community.
  • the cell identifier may be one or more.
  • the cell identifier may also be a base station identifier, a beam identifier, a transmission point (Transmission Point or a Transmission and Reception Point, a TRP identifier, etc.
  • the content may be a bitmap, and each bit corresponds to a handover target cell or handover.
  • the command indicates that the value of the bit indicates whether the target cell corresponding to the bit triggers the handover, such as “0” indicates no, and “1” indicates yes.
  • the handover indicates that the MAC CE is in addition to the valid bit, and the other
  • the bit may be a reserved bit.
  • Figure 3 shows an example of a format of a MAC CE, R is a reserved bit, and HO indication is a valid bit of the handover indication.
  • the UE MAC when the MAC layer triggers the handover to indicate the transmission of the MAC CE, the UE MAC performs the following operations:
  • the MAC entity will: if the handover indication procedure determines that the handover indication is triggered and is not cancelled, and if the uplink is determined according to the result of the logical channel prioritization process
  • the resource can accommodate the next handover indication MACCE and its corresponding MAC subheader, and the command multiplexing combination process generates and sends a handover indication MAC CE.
  • the UE MAC when the MAC layer triggers the handover to indicate the transmission of the MAC CE, the UE MAC performs the following operations:
  • the MAC entity If the handover indication procedure determines that the handover indication is triggered and is not cancelled, the MAC entity: the MAC entity has an uplink resource allocated for the new transmission in the local TTI, and the command multiplexing combination process generates and sends a handover indication MAC CE; otherwise A scheduling request is triggered if there is no upstream license assigned or configured.
  • the MAC layer cancels the triggered handover indication MAC CE transmission:
  • the RRC when the validity timer is stopped or timed out, the RRC instructs the MAC layer to cancel the transmission of the handover indication.
  • the validity timer is shown in Embodiment 1.
  • the handover indicating the MAC CE may be a HARQ ACK/NACK, or may be a specific MAC CE, where the specific MAC CE is used to respond to the handover indication sent by the UE. , confirm the switch to be performed.
  • the response MAC CE may further include other information, such as a cell identifier, for indicating the target cell of the handover.
  • the cell identifier may also be a beam identifier, a base station identifier, and a TRP identifier.
  • the response MAC CE including the cell information may correspond to the case where the handover indication sent by the UE includes one or more cell identifiers.
  • the UE begins to handover to the target cell when one or more of the following situations occur:
  • the UE MAC indicates that the transmission of the handover indication is completed, and the UE RRC performs handover to the target cell when receiving the handover instruction transmission completion information of the lower layer.
  • the UE performs handover to the target cell, including starting downlink synchronization to the target cell, resetting the MAC, reestablishing the PDCP/RLC (optional), and the like.
  • the specific operation of the UE to perform the handover to the target cell is based on the corresponding operation of the handover in the LTE system, and details are not described herein.
  • the UE considers that the target cell triggers the handover of the cell that meets the associated first condition, or the UE considers that the target cell is the cell corresponding to the cell identifier carried in the response information corresponding to the handover indication MAC CE.
  • the switching instruction in step 2 in the embodiment 15 adopts the method of MAC signaling.
  • the MAC signaling is not a MAC CE but a MAC sub-header, that is, the switching is used.
  • the indicated MAC subheader does not have a corresponding MAC Service Data Unit (SDU) or MAC CE in the MAC payload behind the MAC header.
  • SDU MAC Service Data Unit
  • the following MAC layer can also be called a MAC entity.
  • the UE RRC layer instructs the lower layer to send a handover indication to the base station.
  • the base station refers to the source base station.
  • the UE MAC layer when receiving an indication to send a handover indication from the upper layer, the UE MAC layer triggers a handover indicating the transmission of the MAC signaling.
  • the handover indication MAC signaling corresponds to a dedicated logical channel identifier LCID.
  • the content may include a 1 bit bit to indicate whether the UE is about to start handover to the target cell, or to inform the base station that the first condition has been met.
  • the content may include a cell identifier, used to indicate a target cell to which the UE is about to start handover, or a target cell used to indicate that the UE is triggered to start handover, or is used to indicate that the first condition is met. Target cell.
  • the cell identifier may be one or more, and the cell identifier may also be a base station identifier, a beam identifier, a TRP identifier, or the like.
  • the content may be a bitmap, and each bit corresponds to a handover target cell or a handover command, and the value of the bit indicates whether the target cell corresponding to the bit triggers the handover, such as “0” indicates no. , "1" means yes.
  • the handover indication MAC signaling in addition to the significant bits, the other bits may be R/E/F/L bits.
  • Figure 4 shows an example of the format of the MAC subheader, where the o bit can be the R/E/F/L bit, and the R/E/F/L bit is the same as the definition of the MAC subheader of the LTE system. , not to repeat here.
  • the UE MAC when the MAC layer triggers the handover indicating the transmission of the MAC subheader, the UE MAC performs the following operations:
  • the MAC entity will: if the handover indication procedure determines that the handover indication is triggered and is not cancelled, and if the uplink is determined according to the result of the logical channel prioritization process
  • the resource can accommodate the next handover indication MAC subheader, and the command multiplexing combination process generates and sends a handover indication MAC subheader.
  • the UE MAC when the MAC layer triggers the handover indicating the transmission of the MAC subheader, the UE MAC performs the following operations:
  • the MAC entity will: in the TTI, the MAC entity has an uplink resource allocated for the new transmission, and the command multiplexing combination process is generated. And send a handover indication MAC subheader; otherwise, if there is no uplink permission assigned or configured, the scheduling request is triggered.
  • the MAC layer cancels the triggered handover indication MAC subheader to send:
  • the RRC when the validity timer is stopped or timed out, the RRC instructs the MAC layer to cancel the transmission of the handover indication.
  • the validity timer is shown in Embodiment 1.
  • the response indicating the MAC sub-header may be a HARQ ACK/NACK, or may be a specific MAC CE, and the specific MAC CE is used to respond to the handover sent by the UE. Indicates that the switch to be performed is confirmed.
  • the response MAC CE may further include other information, such as a cell identifier, for indicating the target cell of the handover.
  • the cell identifier may also be a beam identifier, a base station identifier, and a TRP identifier.
  • the response MAC CE including the cell information may correspond to the case where the handover indication sent by the UE includes one or more cell identifiers.
  • the UE begins to handover to the target cell when one or more of the following situations occur:
  • the UE MAC indicates that the transmission of the handover indication is completed, and the UE RRC performs handover to the target cell when receiving the handover instruction transmission completion information of the lower layer.
  • the UE performs handover to the target cell, including starting downlink synchronization to the target cell, resetting the MAC, reestablishing the PDCP/RLC (optional), and the like.
  • the specific operation of the UE to perform the handover to the target cell is based on the corresponding operation of the handover in the LTE system, and details are not described herein.
  • the UE considers that the target cell triggers the handover of the cell that meets the associated first condition, or the UE considers that the target cell is the cell corresponding to the cell identifier carried in the response information corresponding to the handover indication MAC subheader.
  • the handover indication in step 2 in Embodiment 15 is adopted in the manner of RRC signaling.
  • the UE RRC when the first condition is satisfied in step 1 of Embodiment 15, the UE RRC sends a handover indication to the base station.
  • the base station refers to the source base station.
  • its content may include a 1 bit bit to indicate whether the UE is about to start switching to the target cell, or as the first condition has been met.
  • the content may include a cell identifier, a target cell indicating that the UE is about to start handover, or a target cell indicating that the UE is triggered to start handover, or a target cell that is described as satisfying the first condition.
  • the cell identifier may be one or more, and the cell identifier may also be a base station identifier, a beam identifier, a TRP identifier, or the like.
  • the content may be a bitmap, and each bit corresponds to a handover target cell or a handover command, and the value of the bit indicates whether the target cell corresponding to the bit triggers the handover, such as “0” indicates no. , "1" means yes.
  • the foregoing handover indication may be a single RRC message, or may be an IE in other RRC messages.
  • the RRC layer when the RRC layer triggers the transmission of the handover indication message, the RRC layer submits a handover indication message to the lower layer for transmission.
  • the response of the handover indication may be RRC signaling, which may be a specific MAC CE.
  • the response of the handover indication is for confirming the handover to be performed in response to a handover indication sent by the UE.
  • the response may further include other information, such as a cell identifier, for indicating the target cell of the handover.
  • the cell identifier may also be a beam identifier, a base station identifier, and a TRP identifier.
  • the response including the cell information may correspond to the case where the handover indication sent by the UE includes one or more cell identifiers.
  • the UE begins to handover to the target cell when one or more of the following situations occur:
  • the UE performs handover to the target cell, including starting downlink synchronization to the target cell, resetting the MAC, reestablishing the PDCP/RLC (optional), and the like.
  • the specific operation of the UE to perform the handover to the target cell is based on the corresponding operation of the handover in the LTE system, and details are not described herein.
  • the UE considers that the target cell triggers the handover of the cell that meets the associated first condition, or the UE considers that the target cell is the cell corresponding to the cell identifier carried in the response information corresponding to the handover indication message.
  • the UE RRC when the first condition is satisfied in step 1 of Embodiment 15, the UE RRC triggers L1 to send an L1 handover indication to the base station.
  • the base station refers to the source base station.
  • the handover indication signaling may be a specific scheduling request, which uses a specific physical time-frequency resource or adopts a specific code sequence. By specific means, it can be used to distinguish between scheduling requests that are typically used to request an upstream grant.
  • the L1 handover indication may be a preamble.
  • the preamble may be a specific preamble allocated by the system for switching indication purposes, such as by system information.
  • the preamble used by the UE to send a handover indication may be allocated by the base station in an RRC message including a handover command.
  • the response of the handover indication may be RRC signaling, which may be a specific MAC CE.
  • the response of the handover indication is for confirming the handover to be performed in response to a handover indication sent by the UE.
  • the response may further include other information, such as a cell identifier, for indicating the target cell of the handover.
  • the cell identifier may also be a beam identifier, a base station identifier, and a TRP identifier.
  • the response including the cell information may correspond to the case where the handover indication sent by the UE includes one or more cell identifiers.
  • step 2A is optional, ie the UE may not have to wait for a response message to receive the handover indication.
  • the UE begins to handover to the target cell when one or more of the following situations occur:
  • the UE performs handover to the target cell, including starting downlink synchronization to the target cell, resetting the MAC, reestablishing the PDCP/RLC (optional), and the like.
  • the specific operation of the UE to perform the handover to the target cell is based on the corresponding operation of the handover in the LTE system, and details are not described herein.
  • the UE considers that the target cell triggers the handover of the cell that meets the associated first condition, or the UE considers that the target cell is the cell corresponding to the cell identifier carried in the response information corresponding to the handover indication message.
  • Embodiment 20 Method for performing handover on a base station side
  • Step 1 Receive a handover indication message sent from the UE.
  • the handover indication message may also be described as handover indication information or a message including handover indication information.
  • the handover indication is used to inform the base station that the UE is to start performing handover, and may also be described as the handover indication is used to notify the base station that handover occurs.
  • An example of the handover indication message is shown in Embodiment 16 to Embodiment 19, but is not limited thereto.
  • Step 2 Send a response message to the UE.
  • the response message is used to respond to the handover indication sent by the UE, or to confirm the handover. Examples are shown in Examples 16 to 19, but are not limited thereto. As mentioned before, this step 2 is an optional step.
  • the handover is a conditional handover, that is, the handover command includes first condition related information, and when the first condition is met, the UE starts to perform a handover procedure.
  • the first condition may be a measurement event, for example, the first condition may be that the neighboring cell exceeds a threshold value of the serving cell signal quality for a period of time.
  • the neighboring cell corresponds to a target cell of the handover.
  • Step 3 Stop data transmission and communication with the UE.
  • the base station is informed by the foregoing steps that the UE is about to start handover to the target cell, and the base station stops data transmission with the UE to avoid waste of resources caused by unnecessary data transmission/data loss.
  • Step 4 Start data forwarding to the target cell.
  • the base station is informed by the foregoing steps that the UE is about to start handover to the target cell, and the base station triggers forwarding the uplink or downlink data that has not been sent or has not been successfully acknowledged to the target cell through the X2/Xn interface.
  • X2/Xn is a logical interface between the base station and the base station, and there may be other commands in different systems or scenarios. The application is not limited to this name.
  • Steps 3 and 4 above are optional.
  • the order of execution of the above steps is not limited in the present application.
  • This embodiment explains the configuration method of the first condition for switching in the above embodiment.
  • the configuration of the first condition is the same as the other measurement configuration, and is included in the measurement configuration information element (IE), and the measurement configuration in the LTE is taken as an example, and is included in the measconfig IE, including the corresponding Measurement object (measobject), report configuration (reportconfig), measurement identifier (measID), and so on.
  • the reporting configuration does not include the reportamount, reportinterval, and maxreportcells parameters.
  • the first RRC message containing the handover command includes a measID, as included in the mobility control information IE. Based on the measID, the UE can know that the measurement configuration corresponding to the measID in the measurement configuration IE is for the first condition.
  • the first RRC message including the handover command includes a measurement configuration IE and a mobility control information IE
  • the measurement configuration IE includes a measurement configuration with a measID of 1, 2, and 3. If the mobile control information IE includes a measID of 2, the UE considers The switching is based on the switching of the first condition, and the configuration of the first condition adopts a configuration corresponding to the measID of 2.
  • the UE does not need to perform measurement reporting.
  • the configuration of the first condition is the same as the other measurement configuration, and is included in the measurement configuration IE, and the measurement configuration in the LTE is taken as an example, and is included in the measconfig IE, including the corresponding measurement object (measobject), Report configuration (reportconfig), measurement identifier (measID), and so on.
  • the reporting configuration does not include the reportamount, reportinterval, and maxreportcells parameters.
  • a target cell identifier is included in the report configuration or the measurement object configuration or the measurement identifier configuration, and the target cell identifier is consistent with the target cell identifier in the mobility control IE, and the UE includes the report configuration or the measurement object or the measurement identifier configuration. The target cell identifier determines that the measurement configuration corresponding to the reporting configuration or the measurement object configuration or the measurement identifier is used as the first condition.
  • the indication information may be included in the report configuration or the measurement object configuration or the measurement identifier configuration, and the UE determines the report configuration or measurement pair by using the indication information.
  • the measurement configuration corresponding to the configuration or measurement identifier is used as the first condition.
  • the indication information may be an enumerated type or a boolean type, such as
  • the RRC message including the handover command may be further included in the mobility control IE, and includes an indication information, where the UE determines, by using the indication information, that the handover is performed based on the first condition or The switching is performed after the first condition is satisfied.
  • the indication information may be an enumerated type or a boolean type, such as
  • Embodiment 22 L2 processing method in switching
  • This embodiment relates to the UE side, and provides a method for the UE to process L2 according to the indication of the base station.
  • Step 1 Receive an RRC message that is sent by the base station and includes a handover command.
  • Step 2 Process L2 according to the RRC message or the handover command in step 1.
  • step 2 in an embodiment, if the RRC message or the handover command indicates that the PDCP does not need to be reestablished, the UE does not re-establish the PDCP when the configuration in the application handover command performs handover. In an embodiment, if the RRC message or the handover command indicates that the RLC does not need to be reestablished, the UE does not re-establish the RLC when the configuration in the application handover command performs handover. In an embodiment, if the RRC message or the handover command indicates that the L2 does not need to be reestablished, the UE does not re-establish the PDCP and the RLC when the configuration in the application handover command performs handover.
  • the UE reconstructs the PDCP when the configuration in the application handover command performs handover. In an embodiment, if the RRC message or the handover command indicates that the RLC needs to be reestablished, the UE re-establishes the RLC when the configuration in the application handover command performs handover. In an embodiment, if the RRC message or the handover command indicates that the L2 needs to be reestablished, the UE reconstructs the PDCP and the RLC when the configuration in the application handover command performs handover.
  • the UE is re-established by default when the UE performs the handover in the configuration in the application handover command. In an embodiment, if the indication that the RLC needs to be re-established is not included in the RRC message or the handover command, the default is that the UE re-establishes the RLC when the configuration in the application handover command performs handover.
  • the UE re-establishes the PDCP and the RLC by default when the UE performs the handover in the configuration in the application handover command.
  • the UE may determine whether it is necessary to re-establish the PDCP or the RLC entity based on the indication of the base station, thereby avoiding the overhead and delay caused by unnecessary reconstruction of the PDCP or the RLC entity.
  • the method of the present application and the apparatus involved have been described above in connection with the preferred embodiments. Those skilled in the art will appreciate that the methods shown above are merely exemplary. The methods of the present application are not limited to the steps and sequences shown above.
  • the network nodes and user equipment shown above may include more modules, for example, may also include modules that may be developed or developed in the future for base stations, or UEs, and the like.
  • the various logos shown above are merely exemplary and not limiting, and the application is not limited to specific cells as examples of such identifications. Many variations and modifications can be made by those skilled in the art in light of the teachings of the illustrated embodiments.
  • the above-described embodiments of the present application can be implemented by software, hardware, or a combination of both software and hardware.
  • the base station and various components within the user equipment in the above embodiments may be implemented by various devices including, but not limited to, analog circuit devices, digital circuit devices, digital signal processing (DSP) circuits, and programmable processing. , Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs), Programmable Logic Devices (CPLDs), and more.
  • ASICs Application Specific Integrated Circuits
  • FPGAs Field Programmable Gate Arrays
  • CPLDs Programmable Logic Devices
  • base station refers to a mobile communication data and control switching center having a large transmission power and a relatively large coverage area, including resource allocation scheduling, data reception and transmission, and the like.
  • User equipment refers to a user mobile terminal, for example, a terminal device including a mobile phone, a notebook, etc., which can perform wireless communication with a base station or a micro base station.
  • the computer program product is a product having a computer readable medium encoded with computer program logic that, when executed on a computing device, provides related operations to implement The above technical solution of the present application.
  • the computer program logic When executed on at least one processor of a computing system, the computer program logic causes the processor to perform the operations (methods) described in this application.
  • Such an arrangement of the present application is typically provided as software, code, and/or other data structures, such as one or more, that are arranged or encoded on a computer readable medium such as an optical medium (eg, CD-ROM), floppy disk, or hard disk.
  • ROM or RAM or PROM chip Other media on firmware or microcode, or downloadable software images in one or more modules, shared databases, and the like.
  • Software or firmware or such a configuration may be installed on the computing device such that one or more processors in the computing device perform the technical solutions described in the embodiments of the present application.
  • each functional module or individual feature of the base station device and the terminal device used in each of the above embodiments may be implemented or executed by circuitry, typically one or more integrated circuits.
  • Circuitry designed to perform the various functions described in this specification can include general purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs) or general purpose integrated circuits, field programmable gate arrays (FPGAs), or others.
  • a general purpose processor may be a microprocessor, or the processor may be an existing processor, controller, microcontroller, or state machine.
  • the above general purpose processor or each circuit may be configured by a digital circuit or may be configured by a logic circuit.
  • the present application can also use integrated circuits obtained using the advanced technology.
  • the program running on the device may be a program that causes a computer to implement the functions of the embodiments of the present application by controlling a central processing unit (CPU).
  • the program or information processed by the program may be temporarily stored in a volatile memory (such as a random access memory RAM), a hard disk drive (HDD), a non-volatile memory (such as a flash memory), or other memory system.
  • a volatile memory such as a random access memory RAM
  • HDD hard disk drive
  • non-volatile memory such as a flash memory
  • a program for realizing the functions of the embodiments of the present application can be recorded on a computer readable recording medium.
  • the corresponding functions can be realized by causing a computer system to read programs recorded on the recording medium and execute the programs.
  • the so-called "computer system” herein 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 of a short-term dynamic storage program, or any other recording medium readable by a computer.
  • circuitry designed to perform the functions described in this specification can 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.
  • 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. In the case of new integrated circuit technologies that replace existing integrated circuits due to advances in semiconductor technology, the present application can also be implemented using these new integrated circuit technologies.
  • the program running on the device may be a program that causes a computer to implement the functions of the embodiments of the present application by controlling a central processing unit (CPU).
  • the program or information processed by the program may be temporarily stored in a volatile memory (such as a random access memory RAM), a hard disk drive (HDD), a non-volatile memory (such as a flash memory), or other memory system.
  • a volatile memory such as a random access memory RAM
  • HDD hard disk drive
  • non-volatile memory such as a flash memory
  • present application is not limited to the above embodiment. Although various examples of the described embodiments have been described, the present application is not limited thereto.
  • Fixed or non-mobile electronic devices installed indoors or outdoors can be used as terminal devices or communication devices such as AV devices, kitchen devices, cleaning devices, air conditioners, office equipment, vending machines, and other home appliances.

Landscapes

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

Abstract

一种由用户设备UE执行的方法、用户设备和基站，方法包括：从基站接收包含切换命令的第一无线电资源控制RRC消息；保存第一RRC消息中包括的切换配置；以及对切换配置进行管理。UE在收到包含切换命令的RRC消息之前，在执行切换之前仍然保持和源基站的通信，减小了数据传输中断的时间。

Description

用户移动性方法和设备 技术领域
本申请涉及无线通信技术领域。更具体地，本申请涉及设备间通信的方法以及用户设备和基站。
背景技术
2016年3月，在第三代合作伙伴计划(3rd Generation Partnership Project：3GPP)RAN#71次全会上，NTT DOCOMO提出了一个关于5G技术标准的新的研究项目(参见非专利文献：RP-160671：New SID Proposal：Study on New Radio Access Technology)，并获批准。该研究项目的目的是开发一个新的无线(New Radio：NR)接入技术以满足5G的所有应用场景、需求和部署环境。NR主要有三个应用场景：增强的移动宽带通信(Enhanced Mobile Broadband：eMBB)、大规模机器类通信(massive Machine Type Communication：mMTC)和超可靠低延迟通信(Ultra Reliable and Low Latency Communications：URLLC)。按照该研究项目的规划，NR的标准化分二个阶段进行：第一阶段的标准化工作将于2018年中期完成；第二阶段的标准化工作将于2019年底完成。第一阶段的标准规范要前向兼容于第二阶段的标准规范，而第二阶段的标准规范要建立在第一阶段的标准规范之上，并满足5G NR技术标准的所有要求。
在当前的LTE新系统的，连接态的用户移动性主要通过切换过程来实现。流程简述如下：
阶段1：基站向用户设备(User Equipment，UE)下发测量配置；UE基于该测量配置进行测量，当满足所配置的上报条件时，UE向基站发送测量报告。基站结合收到的测量报告以及其他因素如基站负载等决定是否需要切换该UE。
阶段2：若决定切换，则源基站触发切换准备过程向目标基站发送切换请求消息；目标基站根据切换请求消息中UE的上下文和目标基站的资源等 因素决定是否接纳该UE，如果可以，则向源基站反馈切换确认消息，其中切换确认消息中包含切换命令。
阶段3：源基站将切换命令下发给UE，并向目标基站开始数据转发。收到切换命令的UE立即执行切换命令，接入到目标基站。
阶段3：目标基站确认UE成功接入后，向源基站发送切换完成消息。
从上可见，LTE系统中的切换流程会引发数据传输的中断，后续版本的LTE系统中，对于切换流程的优化如无随机接入过程的切换等都旨在降低切换时延及开销。
在5G NR技术需求中，要求在移动切换过程中尽可能满足“0ms”的数据中断时延，以达到NR中的无缝切换的移动性需求。在当前的切换过程中，一种导致切换失败而造成较长时间数据传输中断的原因是切换命令下发的不及时。对于该问题，一种可行的方法是条件切换。在条件切换中，设置相对保守的测量报告门限，使得基站提前获取测量结果，并根据测量结果和选定的目标基站执行切换准备流程，这样基站可以在真正的切换条件满足之前，提前将切换命令下发给UE，其中携带切换执行的条件。不同于长期演进系统(Long Term Evolution，LTE)现有切换机制，UE收到切换命令后，并不会立即执行切换，而是根据切换命令消息中携带的切换条件进行检测，当切换条件满足时，UE开始执行切换命令，向目标小区接入。
发明内容
在下一代通信系统中，如何提高用户移动性能以达到“0ms”中断时间的目标，成为亟待解决的问题。
根据本申请的一个方面，提供了一种由用户设备UE执行的方法，包括：从基站接收包含切换命令的第一无线电资源控制RRC消息；保存第一RRC消息中包括的切换配置；以及对所述切换配置进行管理。
在一个实施例中，对所述切换配置进行管理包括：启动定时器，所述定时器用于切换配置管理。
在一个实施例中，只有第一RRC消息包含与定时器有关的配置时，才启动定时器。
在一个实施例中，所述第一RRC消息包含第一条件，所述方法还包括：当满足所述第一条件时，执行切换过程。
在一个实施例中，方法还包括：当开始执行切换过程时，或当接收到第二RRC消息并且UE保存有从第一RRC消息中接收到的切换配置时，停止所述定时器。
在一个实施例中，方法还包括：当开始执行切换过程时，或当接收到第二RRC消息并且UE保存有从第一RRC消息中接收到的切换配置时，认定所述定时器超时。
在一个实施例中，方法还包括：在定时器停止或超时时，释放所保存的从第一RRC消息中接收的切换配置。
在一个实施例中，所述与定时器有关的配置包括定时器的值。
在一个实施例中，所述第一RRC消息包括第二条件，对所述切换配置进行管理包括：当满足第二条件时，释放所保存的切换配置。
在一个实施例中，所述第二条件包括测量事件。
根据本申请的另一个方面，提供了一种用户设备UE，包括：接收单元，被配置为从基站接收包含切换命令的第一无线电资源控制RRC消息；存储单元，被配置为保存第一RRC消息中包括的切换配置；以及管理单元，被配置为对所述切换配置进行管理。
在一个实施例中，所述管理单元被配置为：启动定时器，所述定时器用于切换配置管理。
在一个实施例中，所述管理单元被配置为：只有第一RRC消息包含与定时器有关的配置时，才启动定时器。
在一个实施例中，所述第一RRC消息包含第一条件，所述UE还包括：切换单元，被配置为当满足所述第一条件时执行切换过程。
在一个实施例中，所述管理单元被配置为：当开始执行切换过程时，或当接收到第二RRC消息并且UE保存有从第一RRC消息中接收到的切换配置时，停止所述定时器。
在一个实施例中，所述管理单元被配置为：当开始执行切换过程时，或当接收到第二RRC消息并且UE保存有从第一RRC消息中接收到的切换 配置时，认定所述定时器超时。
在一个实施例中，所述管理单元被配置为：在定时器停止或超时时，释放所保存的从第一RRC消息中接收的切换配置。
在一个实施例中，所述与定时器有关的配置包括定时器的值。
在一个实施例中，所述第一RRC消息包括第二条件，所述管理单元被配置为：当满足第二条件时，释放所保存的切换配置。
在一个实施例中，所述第二条件包括测量事件。
根据本申请的另一个方面，提供了一种由基站执行的方法，包括：向用户设备UE发送包含切换命令的第一无线电资源控制RRC消息，所述RRC消息中包含切换条件；以及当满足切换条件时，停止执行相对应的切换。
在一个实施例中，所述切换条件包括定时器配置。当定时器超时时，停止相对应的切换。
在一个实施例中，所述切换条件包括第二条件，所述第二条件用于判断所述切换命令是否有效。当第二条件指示切换命令无效时，停止或取消相对应的切换。
在个实施例中，该方法还包括：从目标小区接收切换确认消息。
在一个实施例中，所述切换命令包含第一条件相关信息。当满足所述第一条件满足时，UE开始执行切换。
在一个实施例中，所述切换确认消息消息包括X2/Xn消息。
根据本申请的另一个方面，提供了一种基站，包括：发送单元，被配置为向用户设备UE发送包含切换命令的第一无线电资源控制RRC消息，所述RRC消息中包含切换条件；以及切换管理单元，被配置为当满足切换条件时停止执行相对应的切换。
在一个实施例中，所述切换条件包括定时器配置。切换管理单元被配置为：当定时器超时时，停止相对应的切换。
在一个实施例中，所述切换条件包括第二条件，所述第二条件用于判断所述切换命令是否有效。切换管理单元被配置为：当第二条件指示切换命令无效时，停止或取消相对应的切换。
在一个实施例中，该基站还包括：接收单元，被配置为从目标小区接收切换确认消息。
在一个实施例中，所述切换命令包含第一条件相关信息。当满足所述第一条件满足时，UE开始执行切换。
在一个实施例中，所述切换确认消息消息包括X2/Xn消息。
通过本申请的技术方案，NR中切换过程中的数据传输中断时间能够得到进一步的降低，而且使得UE能够合理管理所切换配置信息，避免不必要的错误切换，以及由此带来的信令开销和业务中断。
本申请并不限于NR系统，也适用于其他如Release 15及之后版本的LTE系统等。此外，本申请也并不限于条件切换方法中，也同样适用于其他切换方法中。
附图说明
通过下文结合附图的详细描述，本申请的上述和其它特征将会变得更加明显，其中：
图1是示出了根据本申请一个实施例的由用户设备执行的方法的流程图。
图2是示出了根据本申请一个实施例的用户设备的框图。
图3是示出了MAC CE的一种示例格式的示意图。
图4是示出了MAC子头的一种示例格式的示意图。
图5是示出了根据本申请一个实施例的基站的框图。
参照以下的附图可以更好地理解本申请的很多方面。附图中的部件不是成比例绘制的，而只是为了示出本申请的原理。为了便于示出和描述本申请的一些部分，附图中对应部分可能被放大或缩小。
在本申请的一个附图或一种实施方式中描述的元素和特征可以与一个或更多个其它附图或实施方式中示出的元素和特征相结合。此外，在附图 中，类似的标号表示几个附图中对应的部件，并可用于指示多于一种实施方式中使用的对应部件。
具体实施方式
参照后文的说明和附图，详细公开了本申请的特定实施方式，指明了本申请的原理可以被采用的方式。应该理解，本申请的实施方式在范围上并不因而受到限制。在所附权利要求的精神和条款的范围内，本申请的实施方式包括许多改变、修改和等同。
针对一种实施方式描述和/或示出的特征可以以相同或类似的方式在一个或更多个其它实施方式中使用，与其它实施方式中的特征相组合，或替代其它实施方式中的特征。
应该强调，术语“包括/包含”在本文使用时指特征、整件、步骤或组件的存在，但并不排除一个或更多个其它特征、整件、步骤或组件的存在或附加。
以下将结合附图和具体实施例，对本申请所提出的一种切换方法进行进一步说明。
本申请以演进的同一陆地无线接入网络(Evolved Universal Terrestrial Radio Access Network，E-UTRAN)、NR及对应的核心网和下一代核心网为例进行说明，应当说明的是，本申请并不限于所述E-UTRAN、NR及对应的核心网和下一代核心网，也可以用于演进的其他无线通信系统，例如6G无线通信系统，或者也可适用于其他部署场景如双连接/多连接场景下。需要说明的是，不同的部署场景下或不同的无线通信系统中，基站、小区、源基站、源小区、目标基站、目标小区等定义和命名方式可能会不同，本申请可以同样适用于这些使用不同命名方式的场景或系统中，如演进基站(evolved node B，eNB)也可替换为NR基站(NR node，gNB)。同样，在NR和/或后续版本E-UTRAN通信系统中，基于LTE，无线协议层也包含无线资源控制(Radio Resource Control，RRC)层，分组数据汇聚协议(Packet Data Covergence Protocol，PDCP)层、无线链路控制(Radio Link Control，RLC)层、媒介接入控制(Medium Access Control，MAC)层提供的全部或部分功能， 还可能包含PDCP层、RLC层、MAC层未提供其他功能，例如光束(Bean)管理功能。本申请所述各协议层包括RRC、PDCP、RLC或MAC层适用于E-UTRAN、NR以及其他系统下的所有等同无线协议层概念。
在本申请中，源小区也可称为源基站，也可以是源光束(beam)、源传输点(Transmission point，TRP)，目标小区也可称为目标基站，也可以是目标光束、目标传输点。源小区指的是切换过程执行之前为UE服务的基站或者发生小区重选之前为UE服务或UE驻留的小区，目标小区指的是切换过程执行之后为UE服务的基站，或者说是切换命令中所指示的小区；或者发生小区重选之后为UE服务或UE驻留的小区。
在本申请中，UE在收到包含切换命令的RRC消息之前，在执行切换之前仍然保持和源基站的通信包括数据传输，以进一步减小数据传输中断的时间。
图1是示出了根据本申请一个实施例的由用户设备执行的方法的流程图。如图1所示，该方法包括以下步骤：
步骤S110：方法从此开始执行。
步骤S120：从基站接收包含切换命令的第一无线电资源控制RRC消息。
步骤S130：保存第一RRC消息中包括的切换配置。
步骤S140：对所述切换配置进行管理。优选地，可以启动用于切换配置管理的定时器来执行管理。进一步地，可以在第一RRC消息包含与定时器有关的配置时才启动定时器。例如，与定时器有关的配置包括定时器的值。
备选地，当开始执行切换过程时，或当接收到第二RRC消息并且UE保存有从第一RRC消息中接收到的切换配置时，停止所述定时器。
备选地，当开始执行切换过程时，或当接收到第二RRC消息并且UE保存有从第一RRC消息中接收到的切换配置时，认定所述定时器超时。
备选地，在定时器停止或超时时，释放所保存的从第一RRC消息中接收的切换配置。
备选地，第一RRC消息可以包含第一条件，以及该方法还包括：当满足所述第一条件时，执行切换过程。
备选地，第一RRC消息可以包括第二条件，对所述切换配置进行管理(步骤S140)可以包括：当满足第二条件时，释放所保存的切换配置。例如，第二条件可以包括测量事件。
步骤S150：方法在此处结束。
图2是示出了根据本申请一个实施例的用户设备UE的框图。如图2所示，UE 200包括接收单元210、存储单元220、管理单元230，以及可选地包括切换单元240。本领域技术人员应理解，UE 200还可以包括实现其功能所必需的其他功能单元，如各种处理器、存储器、射频信号处理单元、基带信号处理单元和其它单元等等。然而为了简便，省略了这些公知元件的详细描述。
接收单元210被配置为从基站接收包含切换命令的第一无线电资源控制RRC消息。
存储单元220被配置为保存第一RRC消息中包括的切换配置。
管理单元230被配置为对所述切换配置进行管理。例如，管理单元230可以被配置为：启动定时器，所述定时器用于切换配置管理。优选地，管理单元230可以被配置为：只有第一RRC消息包含与定时器有关的配置时，才启动定时器。例如，与定时器有关的配置可以包括定时器的值。
备选地，管理单元230可以被配置为：当开始执行切换过程时，或当接收到第二RRC消息并且UE保存有从第一RRC消息中接收到的切换配置时，停止所述定时器。
备选地，管理单元230可以被配置为：当开始执行切换过程时，或当接收到第二RRC消息并且UE保存有从第一RRC消息中接收到的切换配置时，认定所述定时器超时。
备选地，管理单元230可以被配置为：在定时器停止或超时时，释放所保存的从第一RRC消息中接收的切换配置。
另外，切换单元240可以被配置为：当满足所述第一RRC消息中包含 的第一条件时，执行切换过程。
备选地，管理单元230可以被配置为：当满足第一RRC消息中包括的第二条件时，释放所保存的切换配置。例如，第二条件可以包括测量事件。
图5是示出了根据本申请一个实施例的基站的框图。如图5所示，基站500包括发送单元510和切换管理单元520，以及可选地包括接收单元530。本领域技术人员应理解，基站500还可以包括实现其功能所必需的其他功能单元，如各种处理器、存储器、射频信号处理单元、基带信号处理单元和其它单元等等。然而为了简便，省略了这些公知元件的详细描述。
发送单元510被配置为向用户设备UE发送包含切换命令的第一无线电资源控制RRC消息，所述RRC消息中包含切换条件。备选地，切换命令还包含第一条件相关信息，当满足所述第一条件满足时，UE开始执行切换。
切换管理单元520被配置为当满足切换条件时停止执行相对应的切换。
例如，切换条件可以包括定时器配置。此时，切换管理单元520被配置为：当定时器超时时，停止相对应的切换。
例如，切换条件可以包括第二条件，所述第二条件用于判断所述切换命令是否有效。此时，切换管理单元520被配置为：当第二条件指示切换命令无效时，停止或取消相对应的切换。
接收单元530被配置为从目标小区接收切换确认消息。例如，切换确认消息可以包括X2/Xn消息。
下面，通过若干具体实施例来描述UE和基站之间的操作。这些操作例如可以通过图2所示的UE 200和图5所示的基站500来实现。
实施例1：基于定时器的切换配置信息管理方法
在本实施例中，UE侧基于一个定时器管理所收到的切换配置信息，简言之，当定时器运行时，UE认为所收到或所存储的切换配置有效；当定时器不运行时，如超时或停止时，UE认为所收到或所存储的切换配置无效，或UE释放/清除/丢弃所收到或所存储的切换配置信息。
该定时器可称为有效性定时器。具体地，对该实施例中的实施方法进行说明。
在一个实施方式中，当收到源基站发来的包含切换命令的第一RRC消息时，UE或UE RRC层可以执行下述操作：
1.启动或重启有效性定时器；
2.保存所收到的切换配置。
所述定时器用于切换配置管理，可选地，所述切换配置包含所述包含切换命令的RRC消息中的所有或部分配置；或者可选地，所述切换配置包含所述切换命令中的配置。在其他实施方式中，所述切换配置也可表述为切换命令。
可选地，所述切换命令包含目标小区的移动控制信息(如小区标识、小区频率、随机接入信息)、系统信息、UE在目标小区对应的无线资源配置、测量配置、安全信息、辅小区配置等中的一种或多种组合。
可选地，上述操作不分先后顺序。
可选地，UE或UE RRC当收到包含切换命令的第一RRC消息，且该消息中包含所述定时器配置时，才执行操作1。
可选地，所述切换为条件切换，即切换命令中包含第一条件相关信息，当所述第一条件满足时，UE开始执行切换流程。
举例来说，第一条件可以是一个测量事件，比如第一条件可以是在持续一段时间内邻小区比服务小区信号质量超过一个门限值，所述邻小区对应切换的目标小区。
在另一种实施方式中，当UE开始执行切换流程时，或当UE收到第二RRC消息并且UE有保存的从第一RRC消息中收到的切换配置时，UE或UE RRC停止有效性定时器，或UE或UE RRC认为该有效性定时器超时。
当有效性定时器停止或超时时，UE释放所保存的从第一RRC消息中收到的切换配置。此处，“释放”也可表述为“丢弃”“清除”等。可选地，UE RRC层(向下层指示)取消切换指示的发送(见下述实施例实施例15～实施例17)。
所述第二RRC消息用于释放RRC连接，或者用于指示UE进入非激活状态(inactive state)，或者用于指示UE挂起RRC连接(RRC suspend)。更近一步，所述第二RRC消息可以是RRC连接重配置消息，或RRC连接释放消息。需要说明的是，这里的inactive状态指的是介于RRC connected状态和RRC idle状态之间的一种状态，NR中尚未对这种状态进行确切命名，有时候可以称作new state，这种new state可以是独立的RRC状态，也可以是RRC connected或RRC idle的一种子状态，LTE或E-UTRAN中这种状态也可以称作轻连接状态(light connected)。对本申请而言，对该状态的其他形式的命令和定义都在本申请的范围内。
在一种实现方式中，所述有效性定时器是由基站通过RRC消息配置的，如包含切换命令的第一RRC消息，所述有效性定时器的配置包含定时器的值。可选地，所述有效性定时器的配置可以是源小区配置的，也可以是目标小区配置的。可选地，在支持多个切换命令或多个切换目标小区的场景下，所述有效性定时器和/或其配置可以是区分每个切换命令或区分每个目标小区的，或者所述有效性定时器是区分切换命令的或区分目标小区的，而其值为一个所有切换命令或目标小区共用的一个公共值。
可选地，若有效性定时器是区分目标小区或区分切换命令的，那本实施例中上述方案也可以是区分目标小区或区分切换命令执行的。
本实施例中上述方法也适用于非切换场景如基于UE的移动性等，更进一步地如小区重选。下述实施方式结合基于UE的移动性进行说明。
在一种实施方式中，UE接收基站发送的小区重选配置，所述小区重选参数通过专用信令接收，如RRC连接释放消息、RRC连接重配置消息等。UE根据所收到的小区重选配置执行小区重选。所述小区重选发生在RRC空闲状态或RRC非激活状态。所述UE基于有效性定时器管理所收到的小区重选配置。所述有效性定时器可以是通过广播信令也可以是通过专用信令配置的，更进一步地，可以包含在小区重选配置中通过专用信令和小区重选配置一起配置给UE。所述小区重选配置包含用于小区重选的配置信息如优选小区信息、重选频率优先级、重选小区优先级等。所述UE基于有效性定时器管理所收到的小区重选配置包括：当定时器运行时，UE认为所保 存的小区重选配置有效，当定时器不运行时如停止或超时，UE认为所保存的小区重选配置无效，和/或UE删除所保存的小区重选配置。所述小区重选配置用于基于UE的移动性，进一步地，用于小区重选，其命名也可以是其他命名如空闲状态移动性控制信息或者非激活状态移动性控制信息等。
在一个实施方式中，当收到基站发来的包含小区重选配置消息时，UE或UE RRC层执行下述操作：
1.启动或重启有效性定时器；
2.保存所收到的小区重选配置。
所述定时器用于小区重选配置管理。
可选地，上述操作不分先后顺序。
可选地，UE或UE RRC当收到小区重选配置，且该消息中包含所述定时器配置时，才执行操作1。
在一种实施方式中，当UE进入RRC连接状态，或者当UE进入RRC空闲状态，或者发生位置区域更新，UE或UE RRC停止有效性定时器，或UE或UE RRC认为该有效性定时器超时。
当有效性定时器停止或超时时，UE释放所保存的小区重选配置。此处，“释放”也可表述为“丢弃”“清除”等。
在另一种实施方式中，可以不依赖上述有效性定时器，即当UE进入RRC连接状态，或者当UE进入RRC空闲状态，或者发生位置区域更新，UE释放所保存的小区重选配置。
实施例2：基于条件的切换配置信息管理方法
在该实施例中，UE侧根据一些条件管理所收到的切换配置。当条件不满足时，UE或UE RRC认为所收到或所保存的切换配置有效，当条件满足时，UE或UE RRC认为所收到的切换配置无效，或UE或UE RRC释放所收到或所保存的切换配置。此处“释放”也可表述为“清除”“丢弃”等。
具体地，对该实施例中的实施方法进行说明。
步骤1，当收到源基站发来的包含切换命令的第一RRC消息时，UE或UE RRC层执行的行为包含：保存所收到的切换配置。
可选地，所述切换配置包含所述包含切换命令的RRC消息中的所有或部分配置；或者可选地，所述切换配置包含所述切换命令中的配置。
可选地，所述切换为条件切换，即切换命令中包含第一条件相关信息，当所述第一条件满足时，UE开始执行切换流程。
举例来说，第一条件可以是一个测量事件，比如第一条件可以是在持续一段时间内邻小区比服务小区信号质量超过一个门限值。所述邻小区对应切换的目标小区。
可选地，所述切换命令包含目标小区的移动控制信息(如小区标识、小区频率、随机接入信息)、系统信息、UE在目标小区对应的无线资源配置、测量配置、安全信息、辅小区配置等中的一种或多种组合。
步骤2，当第二条件满足时，UE或UE RRC执行下述操作：
-认为所保存的切换配置无效，和/或
-释放所保存的切换配置。
所述第二条件由基站通过RRC消息进行配置，该RRC消息可以是系统消息也可以是专用RRC消息，如RRC连接重配置，更进一步可以是包含切换命令的第一RRC消息。可选地，第二条件可以是目标小区配置的，也可以是源小区配置的。
基于LTE中定义的测量事件，所述第二条件可以是下述几个事件的一个或多个的任意组合，但不限于下述事件：
事件1：服务小区信号质量测量值大于一个门限值；
事件2：邻小区信号质量测量值小于一个门限值；
事件3：服务小区信号质量测量值大于邻小区信号质量测量值一个门限值；
事件4：服务小区信号质量测量值大于一个门限值以及邻小区信号质量测量值小于另一个门限值。
上述事件中邻小区指的是切换命令中对应的目标小区。可选地，上述事件中服务小区和目标小区可以是不同的无线接入技术(Radio Access  Technology，RAT)。可选地，所述第二条件或事件的配置可以基于LTE中测量事件的配置。举例来说，当第二条件配置为事件3，其中门限值配置为th，触发时长(TimeToTrigger，TTT)值配置为duration时，UE对源小区和目标小区信号质量进行检测，当源小区信号质量测量值大于邻小区信号质量测量值的差值大于等于th，且持续了duration时间时，UE认为第二条件满足。
该实施例同样适用于支持多个切换命令或多个切换目的小区的场景。在这种场景下，本实施例中上述操作是区分切换命令或切换目标小区执行的。具体来说，第二条件的配置可以是每个切换目标小区配置的，也可以是所有切换目标小区共用的；本实施例中上述UE操作中，当某一个切换目标小区对应的第二条件满足时，UE仅对相对应的切换目标小区对应的切换配置执行相应操作。
实施例3：基于基站控制的切换配置管理方法
在该实施例中，UE根据基站的指示来管理所收到或所保存的切换配置。即当UE收到切换命令时，UE认为所对应的切换配置有效，当UE收到基站发来的无效指示时，UE认为对应的所收到的或所保存的切换配置无效，或UE释放所收到的或所保存的切换配置。
下面具体地描述本实施例的实现方式。
步骤1，当收到源基站发来的包含切换命令的第一RRC消息时，UE或UE RRC层执行的行为包含：保存所收到的切换配置。
可选地，所述切换配置包含所述包含切换命令的RRC消息中的所有或部分配置；或者可选地，所述切换配置包含所述切换命令中的配置。
可选地，所述切换为条件切换，即切换命令中包含第一条件相关信息，当所述第一条件满足时，UE开始执行切换流程。
举例来说，第一条件可以是一个测量事件，比如第一条件可以是在持续一段时间内邻小区比服务小区信号质量超过一个门限值。所述邻小区对应切换的目标小区。
可选地，所述切换命令包含目标小区的移动控制信息(如小区标识、小区频率、随机接入信息)、系统信息、UE在目标小区对应的无线资源配置、测量配置、安全信息、辅小区配置等中的一种或多种组合。
步骤2，接收基站发来的指示信息。该指示信息用于指示UE取消相对应的切换。可以包含在RRC消息中，或者也可以是MAC信令。
步骤3：若所收到的消息包含步骤2所述的指示信息，则UE：
-认为对应的所保存的切换配置无效，和/或
-释放对应的所保存的切换配置。
可选地，在步骤2之前，还包括UE向基站上报测量结果(measurement report)。
该实施例同样适用于多个切换命令或多个切换目标小区的场景。在这种场景下，上述操作是区分目标小区执行的。具体来说，可选地，所述基站发来的指示信息还可以包含目标小区标识或者包含一个可以用于关联到某个切换命令或某个目标小区的标识，此时，步骤3中所述操作仅针对指示信息中所关联的切换命令或目标小区对应的切换配置执行。此外，可选地，在该场景下，若所述基站发来的指示信息不包含目标小区标识或不包含一个可以用于关联到某个切换命令或某个目标小区的标识时，UE对所有切换命令或所有目标小区对应的切换配置执行步骤3中的操作。
实施例4
步骤1，当收到源基站发来的包含切换命令的第一RRC消息时，UE或UE RRC层执行的行为包含：保存所收到的切换配置。
可选地，所述切换配置包含所述包含切换命令的RRC消息中的所有或部分配置；或者可选地，所述切换配置包含所述切换命令中的配置。
可选地，所述切换为条件切换，即切换命令中包含第一条件相关信息，当所述第一条件满足时，UE开始执行切换流程。
可选地，所述切换命令包含目标小区的移动控制信息(如小区标识、小区频率、随机接入信息)、系统信息、UE在目标小区对应的无线资源配置、测量配置、安全信息、辅小区配置等中的一种或多种组合。
步骤2，当监测到发生无线链路失败(Radio Link Failure，RLF)时，UE或UE RRC层执行下述操作：
-认为所保存的切换配置无效，和/或
-释放所保存的切换配置。
该实施例同样适用于多个切换命令或多个切换目标小区的场景。
实施例5
步骤1，当收到源基站发来的包含切换命令的第一RRC消息时，UE或UE RRC层执行的行为包含：保存所收到的切换配置。
可选地，所述切换配置包含所述包含切换命令的RRC消息中的所有或部分配置；或者可选地，所述切换配置包含所述切换命令中的配置。
可选地，所述切换为条件切换，即切换命令中包含第一条件相关信息，当所述第一条件满足时，UE开始执行切换流程。
举例来说，第一条件可以是一个测量事件，比如第一条件可以是在持续一段时间内邻小区比服务小区信号质量超过一个门限值。所述邻小区对应切换的目标小区。
可选地，所述切换命令包含目标小区的移动控制信息(如小区标识、小区频率、随机接入信息)、系统信息、UE在目标小区对应的无线资源配置、测量配置、安全信息、辅小区配置等中的一种或多种组合。
步骤2，当UE开始切换流程时，或收到第二RRC消息且UE上有所保存的切换配置时，UE或UE RRC层执行下述操作：
-认为所保存的切换配置无效，和/或
-释放所保存的切换配置。
所述第二RRC消息用于释放RRC连接，或者用于指示UE进入非激活状态(inactive state)，或者用于指示UE挂起RRC连接(RRC suspend)。更近一步，所述第二RRC消息可以是RRC连接重配置消息，或RRC连接释放消息。需要说明的是，这里的inactive状态指的是介于RRC connected状态和RRC idle状态之间的一种状态，NR中尚未对这种状态进行确切命名，有时候可以称作new state，这种new state可以是独立的RRC状态，也可以是 RRC connected或RRC idle的一种子状态，对本申请而言，对该状态的其他形式的命令和定义都在本申请的范围内。
该实施例同样适用于支持多个切换命令或多个切换目的小区的场景。在这种场景下，本实施例中上述操作是区分切换命令或切换目标小区执行的。具体来说，第二条件的配置可以是每个切换目标小区配置的，也可以是所有切换目标小区共用的；本实施例中上述UE操作中，当某一个切换目标小区对应的第二条件满足时，UE仅对相对应的切换目标小区对应的切换配置执行相应操作。
实施例6
步骤1，当收到源基站发来的包含切换命令的第一RRC消息时，UE或UE RRC层执行的行为包含：保存所收到的切换配置。
可选地，所述切换配置包含所述包含切换命令的RRC消息中的所有或部分配置；或者可选地，所述切换配置包含所述切换命令中的配置。
可选地，所述切换为条件切换，即切换命令中包含第一条件相关信息，当所述第一条件满足时，UE开始执行切换流程。
举例来说，第一条件可以是一个测量事件，比如第一条件可以是在持续一段时间内邻小区比服务小区信号质量超过一个门限值。所述邻小区对应切换的目标小区。
可选地，所述切换命令包含目标小区的移动控制信息(如小区标识、小区频率、随机接入信息)、系统信息、UE在目标小区对应的无线资源配置、测量配置、安全信息、辅小区配置等中的一种或多种组合。
步骤2，当UE收到包含切换命令的又一第一RRC消息且UE上有所保存的切换配置时，UE或UE RRC层执行下述操作：
-认为所保存的切换配置无效，和/或
-释放所保存的切换配置。
该步骤中UE操作也可以是，用收到的又一第一RRC消息中的切换配置替换(replace)所保存的切换配置。
实施例7
步骤1，当收到源基站发来的包含切换命令的第一RRC消息时，UE或UE RRC层执行的行为包含：保存所收到的切换配置。
可选地，所述切换配置包含所述包含切换命令的RRC消息中的所有或部分配置；或者可选地，所述切换配置包含所述切换命令中的配置。
可选地，所述切换为条件切换，即切换命令中包含第一条件相关信息，当所述第一条件满足时，UE开始执行切换流程。
举例来说，第一条件可以是一个测量事件，比如第一条件可以是在持续一段时间内邻小区比服务小区信号质量超过一个门限值。所述邻小区对应切换的目标小区。
可选地，所述切换命令包含目标小区的移动控制信息(如小区标识、小区频率、随机接入信息)、系统信息、UE在目标小区对应的无线资源配置、测量配置、安全信息、辅小区配置等中的一种或多种组合。
步骤2，当UE切换成功时，UE或UE RRC层执行下述操作：
-认为所保存的切换配置无效，和/或
-释放所保存的切换配置。
所述UE切换成功可以是UE向目标小区(成功)发送了切换完成消息即RRC连接重配置完成消息。
实施例8：基站侧对切换配置的管理方法
与实施例1对应，该实施例在切换中的源基站上实现。例如，可以通过图5所示的基站来实现。
步骤1：向UE下发RRC消息，该RRC消息中包含有效性定时器的配置。所述RRC消息可以是包含切换命令的第一RRC消息。所述有效性定时器用于管理切换配置。例如，可以通过图5所示的基站500中的发送单元510来向UE下发RRC消息。
可选地，所述切换配置包含所述包含切换命令的RRC消息中的所有或部分配置；或者可选地，所述切换配置包含所述切换命令中的配置。
可选地，所述切换为条件切换，即切换命令中包含第一条件相关信息，当所述第一条件满足时，UE开始执行切换流程。
举例来说，第一条件可以是一个测量事件，比如第一条件可以是在持续一段时间内邻小区比服务小区信号质量超过一个门限值。所述邻小区对应切换的目标小区。
可选地，所述切换命令包含目标小区的移动控制信息(如小区标识、小区频率、随机接入信息)、系统信息、UE在目标小区对应的无线资源配置、测量配置、安全信息、辅小区配置等中的一种或多种组合。
可选地，步骤2：当该定时器超时时，停止或取消相对应的切换。例如，可以通过图5所示的基站500中的切换管理单元520来停止或取消相对应的切换。
同样，本实施例可以适用于多个切换命令多个切换目标小区场景。在该场景下，有效性定时器和/或其值可以是多个切换命令或多个目标小区共用的，也可以是区分每个切换命令或目标小区配置的。在这种场景下，本实施例中的配置和步骤都是区分切换命令或目标小区的，即仅对相对应的目标小区或相关联的目标小区执行相关操作。
在步骤1之前，可选地还包括：从目标小区接收切换确认消息(handover acknowledge)，该切换确认消息中包含有效性定时器的配置，该消息为X2/Xn消息，X2/Xn为基站与基站之间的接口，也可以是其他命名。即在这种情况下，所述定时器是由目标小区配置的。例如，可以通过图5所示的基站500中的接收单元530来从目标小区接收切换确认消息。
同实施例1，本实施例中上述方法也适用于非切换场景如基于UE的移动性等，更进一步地如小区重选。下述实施方式结合基于UE的移动性进行说明。
在一种实施方式中，基站向UE发送的小区重选配置，所述小区重选参数通过专用信令发生，如RRC连接释放消息、RRC连接重配置消息等。UE根据所收到的小区重选配置执行小区重选。所述小区重选发生在RRC空闲状态或RRC非激活状态。所述UE基于有效性定时器管理所收到的小区重选配置。所述有效性定时器可以是通过广播信令也可以是通过专用信 令配置的，更进一步地，可以包含在小区重选配置中通过专用信令和小区重选配置一起配置给UE。所述小区重选配置用于基于UE的移动性，进一步地，用于小区重选，其命名也可以是其他命名如空闲状态移动性控制信息或者非激活状态移动性控制信息等。
实施例9
与实施例2对应，该实施例在切换中的源基站上实现。例如，可以通过图5所示的基站来实现。
步骤1：向UE下发RRC消息，该RRC消息中包含第二条件的配置。所述RRC消息可以是包含切换命令的第一RRC消息。所述第二条件用于判断所述切换配置是否有效，或用于判断是否释放所述切换配置。例如，可以通过图5所示的基站500中的发送单元510来向UE下发RRC消息。
可选地，所述切换为条件切换，即切换命令中包含第一条件相关信息，当所述第一条件满足时，UE开始执行切换流程。
可选地，所述切换配置包含所述包含切换命令的RRC消息中的所有或部分配置；或者可选地，所述切换配置包含所述切换命令中的配置。
可选地，所述切换命令包含目标小区的移动控制信息(如小区标识、小区频率、随机接入信息)、系统信息、UE在目标小区对应的无线资源配置、测量配置、安全信息、辅小区配置等中的一种或多种组合。
可选地，本实施例包含步骤2，基站在第二条件满足时，停止或取消相对应的切换。所述第二条件满足可以是根据UE的测量报告作出的判断。所述UE的测量报告是当配置的第二条件满足时，UE触发并发送给基站的测量报告。
同样，本实施例可以适用于多个切换命令多个切换目标小区场景。在该场景下，第二条件的配置可以是多个切换命令或多个目标小区共用的，也可以是区分每个切换命令或目标小区配置的。在这种场景下，本实施例中的配置和步骤都是区分切换命令或目标小区的，即仅对相对应的目标小区或相关联的目标小区执行相关操作。
在步骤1之前，可选地还包括从目标小区接收切换确认消息(handover acknowledge)，该切换确认消息中包含第二条件的配置，该消息为X2/Xn消息，X2/Xn为基站与基站之间的接口，也可以是其他命名。即在这种情况下，所述第二条件是由目标小区配置的。例如，可以通过图5所示的基站500中的接收单元530来从目标小区接收切换确认消息。
实施例10
与实施例3对应，该实施例在切换中的源基站上实现。
步骤1，向UE下发指示信息。该指示信息用于指示UE取消相对应的切换。可以包含在RRC消息中，或者也可以是MAC信令。在另一种表述中，该UE信息用于指示UE释放相对应的切换配置。
可选地，所述切换为条件切换，即切换命令中包含第一条件相关信息，当所述第一条件满足时，UE开始执行切换流程。
举例来说，第一条件可以是一个测量事件，比如第一条件可以是在持续一段时间内邻小区比服务小区信号质量超过一个门限值。所述邻小区对应切换的目标小区。
可选地，所述切换配置包含所述包含切换命令的RRC消息中的所有或部分配置；或者可选地，所述切换配置包含所述切换命令中的配置。
可选地，所述切换命令包含目标小区的移动控制信息(如小区标识、小区频率、随机接入信息)、系统信息、UE在目标小区对应的无线资源配置、测量配置、安全信息、辅小区配置等中的一种或多种组合。
可选地，在步骤1之前，还包括接收UE上报的测量结果(measurement report)。
可选地，在步骤1之后，还包括步骤2，接收UE发送的响应消息/信令。
该实施例同样适用于多个切换命令或多个切换目标小区的场景。在这种场景下，上述操作是区分目标小区执行的。具体来说，可选地，所述基站下发的指示信息还可以包含目标小区标识或者包含一个可以用于关联到某个切换命令或某个目标小区的标识。
下述实施例用于说明基站侧对切换配置的管理的方法，其在切换中的目标基站上执行。例如，可以通过图5所示的基站来实现。
实施例11
与实施例1对应，该实施例在切换中的目标基站上实现。
步骤1：向源基站发送切换确认消息(handover acknowledge)，该切换确认消息中包含有效性定时器的配置，该消息为X2/Xn消息，X2/Xn为基站与基站之间的接口，也可以是其他命名。即在这种情况下，所述定时器是由目标小区配置的。可选地，可以包含在切换确认消息中的站间RRC消息中(inter-node RRC)。所述有效性定时器用于管理切换配置。例如，可以通过图5所示的基站500中的发送单元510来向源基站发送切换确认消息。
可选地，所述切换配置包含所述包含切换命令的RRC消息中的所有或部分配置；或者可选地，所述切换配置包含所述切换命令中的配置。
可选地，所述切换为条件切换，即切换命令中包含第一条件相关信息，当所述第一条件满足时，UE开始执行切换流程。举例来说，第一条件可以是一个测量事件，比如第一条件可以是在持续一段时间内邻小区比服务小区信号质量超过一个门限值。所述邻小区对应切换的目标小区。
可选地，所述切换命令包含目标小区的移动控制信息(如小区标识、小区频率、随机接入信息)、系统信息、UE在目标小区对应的无线资源配置、测量配置、安全信息、辅小区配置等中的一种或多种组合。
可选地，步骤2：当该定时器超时时，停止或取消相对应的切换。例如，可以通过图5所示的基站500中的切换管理单元520来停止或取消相对应的切换。
可选地，在步骤1之前还包括接收源基站发来的切换请求消息。
同样，本实施例可以适用于多个切换命令多个切换目标小区场景。在该场景下，有效性定时器和/或其值可以是多个切换命令或多个目标小区共用的，也可以是区分每个切换命令或目标小区配置的。在这种场景下，本实施例中的配置和步骤都是区分切换命令或目标小区的，即仅对相对应的目标小区或相关联的目标小区执行相关操作。
实施例12
与实施例2对应，该实施例在切换中的目标基站上实现。
步骤1：向源基站发送切换确认消息(handover acknowledge)，该切换确认消息中包含第二条件的配置，该消息为X2/Xn消息，X2/Xn为基站与基站之间的接口，也可以是其他命名。即在这种情况下，所述第二条件是由目标小区配置的。可选地，第二条件的配置可以包含切换确认消息中的站间RRC消息中(inter-node RRC)。所述第二条件用于判断所述切换配置是否有效，或用于判断是否释放所述切换配置。
可选地，所述切换为条件切换，即切换命令中包含第一条件相关信息，当所述第一条件满足时，UE开始执行切换流程。举例来说，第一条件可以是一个测量事件，比如第一条件可以是在持续一段时间内邻小区比服务小区信号质量超过一个门限值。所述邻小区对应切换的目标小区。
可选地，所述切换配置包含所述包含切换命令的RRC消息中的所有或部分配置；或者可选地，所述切换配置包含所述切换命令中的配置。
可选地，所述切换命令包含目标小区的移动控制信息(如小区标识、小区频率、随机接入信息)、系统信息、UE在目标小区对应的无线资源配置、测量配置、安全信息、辅小区配置等中的一种或多种组合。
可选地，在步骤1之前还包括接收源基站发来的切换请求消息。
同样，本实施例可以适用于多个切换命令多个切换目标小区场景。在该场景下，第二条件的配置可以是多个切换命令或多个目标小区共用的，也可以是区分每个切换命令或目标小区配置的。在这种场景下，本实施例中的配置和步骤都是区分切换命令或目标小区的，即仅对相对应的目标小区或相关联的目标小区执行相关操作。
下述实施例给出了空口上条件切换能力指示/获取的方法。
实施例13
UE向基站上报其支持条件切换的能力信息。
所述条件切换，即切换命令中包含第一条件相关信息，当所述第一条件满足时，UE开始执行切换流程。举例来说，第一条件可以是一个测量事 件，比如第一条件可以是在持续一段时间内邻小区比服务小区信号质量超过一个门限值。所述邻小区对应切换的目标小区。
所述UE支持条件切换的能力信息可以包含在UEcapabilityinformation消息中。或者通过其他方式来实现，如在其他RRC消息中的显式或隐式的指示。格式举例如：
Conditionalhandover-rxx      ENUMERATED{supported}
OPTIONAL，
基站根据UE的上述能力信息决定是否对该UE的移动性执行条件切换。
在另一种实施方式中，UE向基站上报其支持基于UE移动性的能力。所述基于UE移动性可以是RRC连接状态下的小区重选，。也可是指代上述RRC连接状态下的条件切换。
所述UE支持基于UE移动性的能力信息可以包含在UEcapabilityinformation消息中。或者通过其他方式来实现，如在其他RRC消息中的显式或隐式的指示。格式举例如：
UE-based mobility-rxx      ENUMERATED{supported}
OPTIONAL，
或
Connected-cell-reselection-rxx     ENUMERATED{supported}
OPTIONAL，
基站根据UE的上述能力信息决定是否对该UE执行基于UE的移动性。
下述实施例用于说明X2/Xn上条件切换能力指示/获取的方法。
实施例14
第一基站可以向第二基站指示其是否支持条件切换。该指示信息携带在X2/Xn消息中，例如可以是X2/Xn setup/eNB configuration update消息。X2/Xn为基站与基站之间的接口，在其他系统中也可以是其他命名。
条件切换，即切换命令中包含第一条件相关信息，当所述第一条件满足时，UE开始执行切换流程。举例来说，第一条件可以是一个测量事件， 比如第一条件可以是在持续一段时间内邻小区比服务小区信号质量超过一个门限值。所述邻小区对应切换的目标小区。
在本实施例的另一种实施方式中，源基站在切换准备过程的切换请求消息中向目标基站指示本次切换为条件切换，该指示信息携带在X2/Xn消息中。目标基站可以基于该指示进行切换命令或切换响应等消息中的配置，如配置实施例1所述的定时器。
在本实施例的另一种实施方式中，目标基站在切换准备过程的切换确认消息中向源基站指示本次切换为条件切换，该指示信息携带在X2/Xn消息中。源基站可以基于该指示进行对UE的相应操作，如决定是否在切换命令下发后仍保持和UE的通信。
下述实施例用于说明UE侧执行切换的方法。
实施例15
步骤1，当收到源基站发来的包含切换命令的第一RRC消息时，UE或UE RRC层执行的行为包含：保存所收到的切换配置。
可选地，所述切换为条件切换，即切换命令中包含第一条件相关信息，当所述第一条件满足时，UE开始执行切换流程。举例来说，第一条件可以是一个测量事件，比如第一条件可以是在持续一段时间内邻小区比服务小区信号质量超过一个门限值。所述邻小区对应切换的目标小区。
可选地，所述切换配置包含所述包含切换命令的RRC消息中的所有或部分配置；或者可选地，所述切换配置包含所述切换命令中的配置。
可选地，所述切换命令包含目标小区的移动控制信息(如小区标识、小区频率、随机接入信息)、系统信息、UE在目标小区对应的无线资源配置、测量配置、安全信息、辅小区配置等中的一种或多种组合。
步骤2：当第一条件满足时，UE向基站发送切换指示，该切换指示用于告知基站该UE要开始执行切换，也可以描述为该切换指示用于告知基站切换发生，或者描述为告知基站第一条件已满足。
步骤3：UE执行切换，即UE同步并接入到目标小区。在该步骤中，UE应用所保存的切换命令中的配置，接入目标小区。该步骤是可选的。
可选地，在步骤2之后和/或步骤3之前还包括步骤2A，UE接收基站发来的响应。
在一个实施方式中，UE是否可以或者是否需要在第一条件满足之后发送切换指示是由基站来配置的，即基站通过RRC消息来使能或去使能所述切换指示的发送，所述RRC消息可以是系统消息也可以是包含切换命令的RRC消息。
对于本实施例中步骤2、步骤2A的实施方式，下述实施例16～实施例19给出一些说明，需要注意的是，其实施方式并不限于实施例16～实施例19所列出的。
实施例16
该实施例中，对实施例15中步骤2中的切换指示采用MAC信令的方式即切换指示是一个MAC控制元素(Control Element，CE)。下述MAC层也可称为MAC实体。
在个实施方式中，当实施例15步骤1中第一条件满足时，UE RRC层指示下层向基站发送一个切换指示。此处基站指的是源基站。
在一个实施方式中，当从上层收到发送一个切换指示的指示时，UEMAC层触发一个切换指示MAC CE的发送。
在一个实施方式中，切换指示MAC CE对应一个专用的逻辑信道标识(Logical Channel Identity，LCID)。
所述切换指示MAC CE的具体格式根据其内容和大小不同可能会有多种格式。下述几个实施方式给出几种说明，需要注意的是，以下仅是示例并不限于此。在一种实施方式中，其内容可以包含一个1bit位来指示UE是否即将开始切换到目标小区，或者描述为告知基站第一条件已满足。在另一种实施方式中，其内容可以包含小区标识，用于指示UE即将开始切换到的目标小区，或者说用于指示触发UE开始切换的目标小区，或者描述为已满足第一条件的目标小区。该实施方式中，小区标识可是一个或多个， 小区标识也可是基站标识、beam标识、传输点(Transmission Point或者Transmission and Reception Point，TRP标识等。在另一种实施方式中，其内容可以一个位图，每一个位对应一个切换目标小区或切换命令，所述位的值指示该bit对应的目标小区是否触发了切换，如“0”表示否，“1”表示是。在上述实施方式中，切换指示MAC CE中，除了有效比特位，其他比特可以是预留比特。图3示出了MAC CE的一种格式示例，R为预留比特，HO indication为切换指示的有效比特位。
在一种实施方式中，当MAC层触发了切换指示MAC CE的发送，UE MAC执行下述操作：
如果在本TTI该MAC实体有分配用于新传输的上行资源，则MAC实体将：如果切换指示流程决定切换指示被触发且并未取消，而且如果根据逻辑信道优先过程的结果，所分配的上行资源可以容纳下切换指示MACCE和其对应的MAC子头，命令复用组合流程生成并发送一个切换指示MAC CE。
在一种实施方式中，当MAC层触发了切换指示MAC CE的发送，UE MAC执行下述操作：
如果切换指示流程决定切换指示被触发且并未取消，则MAC实体将：在本TTI该MAC实体有分配用于新传输的上行资源，命令复用组合流程生成并发送一个切换指示MAC CE；否则如果没有分配或配置的上行许可，触发调度请求。
在一种实施方式中，当下述情形的一种或多种发生时，若有触发的切换指示发送，MAC层取消所触发的切换指示MAC CE发送：
-当收到上层的指示以取消切换指示发送；
-当MAC重置时(MAC reset)；
-当一个切换指示MAC CE被包括在一个MAC PDU中将要发送。
在一个实施方式中，当有效性定时器停止或超时，RRC指示MAC层取消切换指示的发送。所述有效性定时器见实施例1。
在一个实施方式中，对于实施例15中步骤2A，切换指示MAC CE的响应可以是HARQ ACK/NACK，也可以是一个特定的MAC CE，所述特定的MAC CE用于响应UE发送的切换指示，确认所述将要执行的切换。可选地，所述响应MAC CE中还可以包含其他信息，如小区标识，用于指示切换的目标小区。所述小区标识也可以是beam标识、基站标识、TRP标识。包含小区信息的响应MAC CE可以对应于上述UE发送的切换指示中包含一个或多个小区标识的情况。
在一个实施方式中，UE在下述一个或多个情形发生时，开始切换到目标小区：
-当发送了切换指示MAC CE时；
-当收到所述切换指示MAC CE的响应时。
在一个实施方式中，UE MAC向上层指示切换指示的发送完成，UE RRC当收到下层的切换指示发送完成信息时，执行到目标小区的切换。
可选地，UE执行对目标小区的切换，包括开始下行同步到目标小区，重置MAC，重建PDCP/RLC(可选)等。此处UE执行对目标小区的切换的具体操作基于LTE系统中的切换相应操作，此处不赘述。
可选地，UE认为目标小区为满足相关联的第一条件触发了切换的小区，或者UE认为目标小区为切换指示MAC CE所对应的响应信息中携带的小区标识所对应的小区。
实施例17
该实施例中，对实施例15中步骤2中的切换指示采用MAC信令的方式，与实施例16不同的是，该MAC信令不是MAC CE，而是MAC子头，即该用于切换指示的该MAC子头在MAC头后面的MAC负载(payload)中没有对应的MAC服务数据单元(Service Data Unit，SDU)或MAC CE。下述MAC层也可称MAC实体。
在一个实施方式中，当实施例15步骤1中第一条件满足时，UE RRC层指示下层向基站发送一个切换指示。此处基站指的是源基站。
在一个实施方式中，当从上层收到发送一个切换指示的指示时，UE MAC层触发一个切换指示MAC信令的发送。
在一个实施方式中，切换指示MAC信令对应一个专用逻辑信道标识LCID。
所述切换指示MAC信令的具体格式根据其内容和大小不同可能会有多种格式。下述几个实施方式给出几种说明，需要注意的是，以下仅是示例并不限于此。在一种实施方式中，其内容可以包含一个1bit位来指示UE是否即将开始切换到目标小区，或者描述为告知基站第一条件已满足。在另一种实施方式中，其内容可以包含小区标识，用于指示UE即将开始切换到的目标小区，或者说用于指示触发UE开始切换的目标小区，或者描述为用于指示满足第一条件的目标小区。该实施方式中，小区标识可是一个或多个，小区标识也可是基站标识、beam标识、TRP标识等。在另一种实施方式中，其内容可以一个位图，每一个位对应一个切换目标小区或切换命令，所述位的值指示该bit对应的目标小区是否触发了切换，如“0”表示否，“1”表示是。在上述实施方式中，切换指示MAC信令中，除了有效比特位，其他比特可以是R/E/F/L比特。图4示出了该MAC子头的一种格式示例，其中o位可以是R/E/F/L比特，R/E/F/L比特为的释义与LTE系统的MAC子头的释义相同，此处不赘述。
在一种实施方式中，当MAC层触发了切换指示MAC子头的发送，UE MAC执行下述操作：
如果在本TTI该MAC实体有分配用于新传输的上行资源，则MAC实体将：如果切换指示流程决定切换指示被触发且并未取消，而且如果根据逻辑信道优先过程的结果，所分配的上行资源可以容纳下切换指示MAC子头，命令复用组合流程生成并发送一个切换指示MAC子头。
在一种实施方式中，当MAC层触发了切换指示MAC子头的发送，UE MAC执行下述操作：
如果切换指示流程决定切换指示被触发且并未取消，则MAC实体将：在本TTI该MAC实体有分配用于新传输的上行资源，命令复用组合流程生 成并发送一个切换指示MAC子头；否则如果没有分配或配置的上行许可，触发调度请求。
在一种实施方式中，当下述情形的一种或多种发生时，若有触发的切换指示发送，MAC层取消所触发的切换指示MAC子头发送：
-当收到上层的指示以取消切换指示发送；
-当MAC重置时(MAC reset)；
-当一个切换指示MAC子头被包括在一个MAC PDU中将要发送。
在一个实施方式中，当有效性定时器停止或超时，RRC指示MAC层取消切换指示的发送。所述有效性定时器见实施例1。
在一个实施方式中，对于实施例15中步骤2A，切换指示MAC子头的响应可以是HARQ ACK/NACK，也可以是一个特定的MAC CE，所述特定的MAC CE用于响应UE发送的切换指示，确认所述将要执行的切换。可选地，所述响应MAC CE中还可以包含其他信息，如小区标识，用于指示切换的目标小区。所述小区标识也可以是beam标识、基站标识、TRP标识。包含小区信息的响应MAC CE可以对应于上述UE发送的切换指示中包含一个或多个小区标识的情况。
在一个实施方式中，UE在下述一个或多个情形发生时，开始切换到目标小区：
-当发送了切换指示MAC子头时；
-当收到所述切换指示MAC子头的响应时。
在一个实施方式中，UE MAC向上层指示切换指示的发送完成，UE RRC当收到下层的切换指示发送完成信息时，执行到目标小区的切换。
可选地，UE执行对目标小区的切换，包括开始下行同步到目标小区，重置MAC，重建PDCP/RLC(可选)等。此处UE执行对目标小区的切换的具体操作基于LTE系统中的切换相应操作，此处不赘述。
可选地，UE认为目标小区为满足相关联的第一条件触发了切换的小区，或者UE认为目标小区为切换指示MAC子头所对应的响应信息中携带的小区标识所对应的小区。
实施例18
该实施例中，对实施例15中步骤2中的切换指示采用RRC信令的方式。
在一个实施方式中，当实施例15步骤1中第一条件满足时，UE RRC向基站发送一个切换指示。此处基站指的是源基站。
下述实施方式给出几种所述切换指示的说明，需要注意的是，以下仅是示例并不限于此。在一种实施方式中，其内容可以包含一个1bit位来指示UE是否即将开始切换到目标小区，或者描述为第一条件已满足。在另一种实施方式中，其内容可以包含小区标识，用于指示UE即将开始切换到的目标小区，或者说用于指示触发UE开始切换的目标小区，或者描述为满足第一条件的目标小区，该实施方式中，小区标识可是一个或多个，小区标识也可是基站标识、beam标识、TRP标识等。在另一种实施方式中，其内容可以一个位图，每一个位对应一个切换目标小区或切换命令，所述位的值指示该bit对应的目标小区是否触发了切换，如“0”表示否，“1”表示是。上述切换指示可以是一个单独的RRC消息，也可以是其他RRC消息中的IE。
在一种实施方式中，当RRC层触发了切换指示消息的发送，RRC层向下层递交切换指示消息以发送。
在一个实施方式中，对于实施例15中步骤2A，切换指示的响应可以是RRC信令，可以是一个特定的MAC CE。所述切换指示的响应用于响应UE发送的切换指示，确认所述将要执行的切换。可选地，所述响应中还可以包含其他信息，如小区标识，用于指示切换的目标小区。所述小区标识也可以是beam标识、基站标识、TRP标识。包含小区信息的响应可以对应于上述UE发送的切换指示中包含一个或多个小区标识的情况。
在一个实施方式中，UE在下述一个或多个情形发生时，开始切换到目标小区：
-当发送了切换指示时；
-当收到所述切换指示的响应时。
可选地，UE执行对目标小区的切换，包括开始下行同步到目标小区，重置MAC，重建PDCP/RLC(可选)等。此处UE执行对目标小区的切换的具体操作基于LTE系统中的切换相应操作，此处不赘述。
可选地，UE认为目标小区为满足相关联的第一条件触发了切换的小区，或者UE认为目标小区为切换指示消息所对应的响应信息中携带的小区标识所对应的小区。
实施例19
该实施例中，对实施例15中步骤2中的切换指示采用层1(layer 1，L1)信令的方式。
在一个实施方式中，当实施例15步骤1中第一条件满足时，UE RRC触发L1向基站发送一个L1切换指示。此处基站指的是源基站。
在一种实施方式中，该切换指示信令可以是一个特定的调度请求，该调度请求有采用特定的物理时频资源或采用特定的码序列。所谓特定指的是可以用于区分一般用于请求上行许可的调度请求。
在一种实施方式中，该L1切换指示可以是一个前导(preamble)。该preamble可以是系统分配的用于切换指示目的的特定preamble，如通过系统信息。在另一种实施方式中，所述UE发送切换指示所使用的preamble可以是基站在包含切换命令的RRC消息中分配的。
在一个实施方式中，对于实施例15中步骤2A，切换指示的响应可以是RRC信令，可以是一个特定的MAC CE。所述切换指示的响应用于响应UE发送的切换指示，确认所述将要执行的切换。可选地，所述响应中还可以包含其他信息，如小区标识，用于指示切换的目标小区。所述小区标识也可以是beam标识、基站标识、TRP标识。包含小区信息的响应可以对应于上述UE发送的切换指示中包含一个或多个小区标识的情况。
如同实施例15所述，步骤2A是可选的，即UE可以不必等待接收切换指示的响应消息。
在一个实施方式中，UE在下述一个或多个情形发生时，开始切换到目标小区：
-当发送了切换指示时；
-当收到所述切换指示的响应时。
可选地，UE执行对目标小区的切换，包括开始下行同步到目标小区，重置MAC，重建PDCP/RLC(可选)等。此处UE执行对目标小区的切换的具体操作基于LTE系统中的切换相应操作，此处不赘述。
可选地，UE认为目标小区为满足相关联的第一条件触发了切换的小区，或者UE认为目标小区为切换指示消息所对应的响应信息中携带的小区标识所对应的小区。
实施例20：基站侧执行切换的方法
步骤1：接收从UE发送的切换指示消息。所述切换指示消息也可以描述为切换指示信息或包含切换指示信息的消息。所述切换指示用于告知基站所述UE要开始执行切换，也可以描述为该切换指示用于告知基站切换发生。该切换指示消息的示例见实施例16～实施例19，但不限于此。
步骤2：向UE发送响应消息。所述响应消息用于应答UE发送的切换指示，或者说确认所述切换。示例见实施例16～实施例19，但不限于此。如前所述，该步骤2是可选步骤。
可选地，所述切换为条件切换，即切换命令中包含第一条件相关信息，当所述第一条件满足时，UE开始执行切换流程。举例来说，第一条件可以是一个测量事件，比如第一条件可以是在持续一段时间内邻小区比服务小区信号质量超过一个门限值。所述邻小区对应切换的目标小区。
步骤3：停止和UE的数据传输和通信。基站通过前述步骤被告知UE将要开始切换到目标小区，则基站停止和UE之间的数据传输，以避免不必要的数据传输/数据丢失而造成的资源浪费。
步骤4：开始向目标小区执行数据转发(data forwarding)。基站通过前述步骤被告知UE将要开始切换到目标小区，则基站触发将尚未发送或尚未成功确认的上行或下行数据通过X2/Xn接口转发给目标小区。此处X2/Xn是基站和基站之间的逻辑接口，在不同系统或场景下可能有其他命令，本申请不限于此命名。
上述步骤3和步骤4都是可选的。本申请中并不限定上述各步骤的执行顺序。
实施例21
该实施例对上述实施例中用于切换的第一条件的配置方法进行说明。
在一种实施方式中，第一条件的配置和其他测量配置一样，包含在测量配置信息元素(Information Element，IE)中，以LTE中的测量配置为例，包含在measconfig IE中，包括对应的测量对象(measobject)、上报配置(reportconfig)，测量标识(measID)等。可选地，与现有机制中的测量配置不同，其上报配置中不包括reportamount，reportinterval，maxreportcells参数。包含切换命令的第一RRC消息中包含一个measID，如包含在移动控制信息IE中。UE基于该measID可以知道测量配置IE中所述measID对应的测量配置是用于第一条件的。为了便于理解，举例如下。包含切换命令的第一RRC消息中包含测量配置IE和移动控制信息IE，测量配置IE中包含measID为1、2、3的测量配置，如果移动控制信息IE中包含了measID为2，则UE认为所述切换为基于第一条件的切换，则第一条件的配置采用measID为2所对应的配置。可选地，若测量配置IE中measID为2的配置是用于第一条件的，则UE无需进行测量上报。
在另一种实施方式中，第一条件的配置和其他测量配置一样，包含在测量配置IE中，以LTE中的测量配置为例，包含在measconfig IE中，包括对应的测量对象(measobject)、上报配置(reportconfig)，测量标识(measID)等。可选地，与现有机制中的测量配置不同，其上报配置中不包括reportamount，reportinterval，maxreportcells参数。上报配置中或测量对象配置中或测量标识配置中包含一个目标小区标识，该目标小区标识与移动控制IE中的目标小区标识一致，UE通过上报配置中或测量对象中或测量标识配置中包含了所述目标小区标识，决定该上报配置或测量对象配置或测量标识所对应的测量配置用作第一条件。
在另一种实施方式中，可以在上报配置中或测量对象配置中或测量标识配置中包含一个指示信息，UE通过该指示信息决定该上报配置或测量对 象配置或测量标识所对应的测量配置用作第一条件。所述指示信息可以是枚举类型或布尔类型，如
conditionalhandover      ENUMERATED{true}，
在另一种实施方式中，包含切换命令的RRC消息中，更进一步地可以是移动控制IE中，包含一个指示信息，UE通过该指示信息决定所述切换是基于第一条件执行或者说所述切换在第一条件满足后执行。所述指示信息可以是枚举类型或布尔类型，如
conditionalhandover      ENUMERATED{true}，
实施例22：切换中的L2处理方法
本实施例涉及UE侧，提供了一种UE根据基站的指示对L2进行处理的方法。
步骤1：接收基站下发的包含切换命令的RRC消息。
步骤2：根据步骤1所述RRC消息或所述切换命令对L2进行处理。
对步骤2，在一个实施方式中，若RRC消息或所述切换命令中指示PDCP无需重建，则UE在应用切换命令中的配置执行切换时，不重建PDCP。一个实施方式中，若RRC消息或所述切换命令中指示RLC无需重建，则UE在应用切换命令中的配置执行切换时，不重建RLC。一个实施方式中，若RRC消息或所述切换命令中指示L2无需重建，则UE在应用切换命令中的配置执行切换时，不重建PDCP和RLC。一个实施方式中，若RRC消息或所述切换命令中指示PDCP需要重建，则UE在应用切换命令中的配置执行切换时，重建PDCP。一个实施方式中，若RRC消息或所述切换命令中指示RLC需要重建，则UE在应用切换命令中的配置执行切换时，重建RLC。一个实施方式中，若RRC消息或所述切换命令中指示L2需要重建，则UE在应用切换命令中的配置执行切换时，重建PDCP和RLC。一个实施方式中，若RRC消息或所述切换命令中不包括PDCP是否需要重建的指示，则默认为UE在应用切换命令中的配置执行切换时，重建PDCP。一个实施方式中，若RRC消息或所述切换命令中不包括RLC是否需要重建的指示，则默认为UE在应用切换命令中的配置执行切换时，重建RLC。一 个实施方式中，若RRC消息或所述切换命令中不包含L2是否需重建，则默认为UE在应用切换命令中的配置执行切换时，重建PDCP和RLC。
通过本实施例，UE可以基于基站指示确定是否需要重建PDCP或RLC实体，从而避免不必要重建PDCP或RLC实体带来的开销和时延。
上文已经结合优选实施例对本申请的方法和涉及的设备进行了描述。本领域技术人员可以理解，上面示出的方法仅是示例性的。本申请的方法并不局限于上面示出的步骤和顺序。上面示出的网络节点和用户设备可以包括更多的模块，例如还可以包括可以开发的或者将来开发的可用于基站、或UE的模块等等。上文中示出的各种标识仅是示例性的而不是限制性的，本申请并不局限于作为这些标识的示例的具体信元。本领域技术人员根据所示实施例的教导可以进行许多变化和修改。
应该理解，本申请的上述实施例可以通过软件、硬件或者软件和硬件两者的结合来实现。例如，上述实施例中的基站和用户设备内部的各种组件可以通过多种器件来实现，这些器件包括但不限于：模拟电路器件、数字电路器件、数字信号处理(DSP)电路、可编程处理器、专用集成电路(ASIC)、现场可编程门阵列(FPGA)、可编程逻辑器件(CPLD)，等等。
在本申请中，“基站”是指具有较大发射功率和较广覆盖面积的移动通信数据和控制交换中心，包括资源分配调度、数据接收发送等功能。“用户设备”是指用户移动终端，例如包括移动电话、笔记本等可以与基站或者微基站进行无线通信的终端设备。
此外，这里所公开的本申请的实施例可以在计算机程序产品上实现。更具体地，该计算机程序产品是如下的一种产品：具有计算机可读介质，计算机可读介质上编码有计算机程序逻辑，当在计算设备上执行时，该计算机程序逻辑提供相关的操作以实现本申请的上述技术方案。当在计算系统的至少一个处理器上执行时，计算机程序逻辑使得处理器执行本申请实施例所述的操作(方法)。本申请的这种设置典型地提供为设置或编码在例如光介质(例如CD-ROM)、软盘或硬盘等的计算机可读介质上的软件、代码和/或其他数据结构、或者诸如一个或多个ROM或RAM或PROM芯片 上的固件或微代码的其他介质、或一个或多个模块中的可下载的软件图像、共享数据库等。软件或固件或这种配置可安装在计算设备上，以使得计算设备中的一个或多个处理器执行本申请实施例所描述的技术方案。
此外，上述每个实施例中所使用的基站设备和终端设备的每个功能模块或各个特征可以由电路实现或执行，所述电路通常为一个或多个集成电路。设计用于执行本说明书中所描述的各个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)或通用集成电路、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、或分立的硬件组件、或以上器件的任意组合。通用处理器可以是微处理器，或者所述处理器可以是现有的处理器、控制器、微控制器或状态机。上述通用处理器或每个电路可以由数字电路配置，或者可以由逻辑电路配置。此外，当由于半导体技术的进步，出现了能够替代目前的集成电路的先进技术时，本申请也可以使用利用该先进技术得到的集成电路。
尽管以上已经结合本申请的优选实施例示出了本申请，但是本领域的技术人员将会理解，在不脱离本申请的精神和范围的情况下，可以对本申请进行各种修改、替换和改变。因此，本申请不应由上述实施例来限定，而应由所附权利要求及其等价物来限定。
运行在根据本申请的设备上的程序可以是通过控制中央处理单元(CPU)来使计算机实现本申请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。
用于实现本申请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，本申请也可以使用这些新的集成电路技术来实现。
运行在根据本申请的设备上的程序可以是通过控制中央处理单元(CPU)来使计算机实现本申请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。
此外，本申请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，但本申请并不局限于此。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，已经参考附图对本申请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，本申请也包括不偏离本申请主旨的任何设计改动。另外，可以在权利要求的范围内对本申请进行多种改动，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申请的技术范围内。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 (32)

  1. 一种由用户设备UE执行的方法，包括：
    从基站接收包含切换命令的第一无线电资源控制RRC消息；
    保存第一RRC消息中包括的切换配置；以及
    对所述切换配置进行管理。
  2. 根据权利要求1所述的方法，其中，对所述切换配置进行管理包括：启动定时器，所述定时器用于切换配置管理。
  3. 根据权利要求2所述的方法，其中，只有第一RRC消息包含与定时器有关的配置时，才启动定时器。
  4. 根据权利要求1所述的方法，其中，所述第一RRC消息包含第一条件，所述方法还包括：
    当满足所述第一条件时，执行切换过程。
  5. 根据权利要求2所述的方法，还包括：
    当开始执行切换过程时，或当接收到第二RRC消息并且UE保存有从第一RRC消息中接收到的切换配置时，停止所述定时器。
  6. 根据权利要求2所述的方法，还包括：
    当开始执行切换过程时，或当接收到第二RRC消息并且UE保存有从第一RRC消息中接收到的切换配置时，认定所述定时器超时。
  7. 根据权利要求1、5或6所述的方法，还包括：
    在定时器停止或超时时，释放所保存的从第一RRC消息中接收的切换配置。
  8. 根据权利要求3所述的方法，其中，所述与定时器有关的配置包括定时器的值。
  9. 根据权利要求1所述的方法，其中，所述第一RRC消息包括第二条件，对所述切换配置进行管理包括：当满足第二条件时，释放所保存的切换配置。
  10. 根据权利要求9所述的方法，其中，所述第二条件包括测量事件。
  11. 一种用户设备UE，包括：
    接收单元，被配置为从基站接收包含切换命令的第一无线电资源控制RRC消息；
    存储单元，被配置为保存第一RRC消息中包括的切换配置；以及
    管理单元，被配置为对所述切换配置进行管理。
  12. 根据权利要求11所述的UE，其中，所述管理单元被配置为：启动定时器，所述定时器用于切换配置管理。
  13. 根据权利要求12所述的UE，其中，所述管理单元被配置为：只有第一RRC消息包含与定时器有关的配置时，才启动定时器。
  14. 根据权利要求11所述的UE，其中，所述第一RRC消息包含第一条件，所述UE还包括：
    切换单元，被配置为当满足所述第一条件时执行切换过程。
  15. 根据权利要求12所述的UE，其中，所述管理单元被配置为：
    当开始执行切换过程时，或当接收到第二RRC消息并且UE保存有从第一RRC消息中接收到的切换配置时，停止所述定时器。
  16. 根据权利要求12所述的UE，其中，所述管理单元被配置为：
    当开始执行切换过程时，或当接收到第二RRC消息并且UE保存有从第一RRC消息中接收到的切换配置时，认定所述定时器超时。
  17. 根据权利要求11、15或16所述的UE，其中，所述管理单元被配置为：
    在定时器停止或超时时，释放所保存的从第一RRC消息中接收的切换配置。
  18. 根据权利要求13所述的UE，其中，所述与定时器有关的配置包括定时器的值。
  19. 根据权利要求11所述的UE，其中，所述第一RRC消息包括第二条件，所述管理单元被配置为：当满足第二条件时，释放所保存的切换配置。
  20. 根据权利要求19所述的UE，其中，所述第二条件包括测量事件。
  21. 一种由基站执行的方法，包括：
    向用户设备UE发送包含切换命令的第一无线电资源控制RRC消息， 所述RRC消息中包含切换条件；以及
    当满足切换条件时，停止执行相对应的切换。
  22. 根据权利要求21所述的方法，其中，所述切换条件包括定时器配置；当定时器超时时，停止相对应的切换。
  23. 根据权利要求21所述的方法，其中，所述切换条件包括第二条件，所述第二条件用于判断所述切换命令是否有效；当第二条件指示切换命令无效时，停止或取消相对应的切换。
  24. 根据权利要求21所述的方法，还包括：
    从目标小区接收切换确认消息。
  25. 根据权利要求21所述的方法，其中，所述切换命令包含第一条件相关信息，当满足所述第一条件满足时，UE开始执行切换。
  26. 根据权利要求24所述的方法，其中，所述切换确认消息包括X2/Xn消息。
  27. 一种基站，包括：
    发送单元，被配置为向用户设备UE发送包含切换命令的第一无线电资源控制RRC消息，所述RRC消息中包含切换条件；以及
    切换管理单元，被配置为当满足切换条件时停止执行相对应的切换。
  28. 根据权利要求27所述的基站，其中，所述切换条件包括定时器配置；
    所述切换管理单元被配置为：当定时器超时时，停止相对应的切换。
  29. 根据权利要求27所述的基站，其中，所述切换条件包括第二条件，所述第二条件用于判断所述切换命令是否有效；
    所述切换管理单元被配置为：当第二条件指示切换命令无效时，停止或取消相对应的切换。
  30. 根据权利要求27所述的基站，还包括：
    接收单元，被配置为从目标小区接收切换确认消息。
  31. 根据权利要求27所述的基站，其中，所述切换命令包含第一条件相关信息，当满足所述第一条件满足时，UE开始执行切换。
  32. 根据权利要求30所述的基站，其中，所述切换确认消息包括X2/Xn消息。
PCT/CN2017/117173 2016-12-23 2017-12-19 用户移动性方法和设备 WO2018113661A1 (zh)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US16/471,190 US11818620B2 (en) 2016-12-23 2017-12-19 Method and device for user mobility
EP17885333.9A EP3562209B1 (en) 2016-12-23 2017-12-19 User mobility method and equipment
US18/372,293 US20240015626A1 (en) 2016-12-23 2023-09-25 Method and device for conditional handover

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201611217085.4A CN108243469B (zh) 2016-12-23 2016-12-23 用户移动性方法和设备
CN201611217085.4 2016-12-23

Related Child Applications (2)

Application Number Title Priority Date Filing Date
US16/471,190 A-371-Of-International US11818620B2 (en) 2016-12-23 2017-12-19 Method and device for user mobility
US18/372,293 Continuation US20240015626A1 (en) 2016-12-23 2023-09-25 Method and device for conditional handover

Publications (1)

Publication Number Publication Date
WO2018113661A1 true WO2018113661A1 (zh) 2018-06-28

Family

ID=62624726

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2017/117173 WO2018113661A1 (zh) 2016-12-23 2017-12-19 用户移动性方法和设备

Country Status (4)

Country Link
US (2) US11818620B2 (zh)
EP (1) EP3562209B1 (zh)
CN (1) CN108243469B (zh)
WO (1) WO2018113661A1 (zh)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020091662A1 (en) * 2018-11-01 2020-05-07 Telefonaktiebolaget Lm Ericsson (Publ) Mobility procedure
WO2020128966A1 (en) * 2018-12-19 2020-06-25 Telefonaktiebolaget Lm Ericsson (Publ) Suspend-resume in conditional handover
WO2020188447A1 (en) * 2019-03-15 2020-09-24 Telefonaktiebolaget Lm Ericsson (Publ) Storing and restoring conditional handover in suspend-resume
GB2589189A (en) * 2019-08-16 2021-05-26 Samsung Electronics Co Ltd Improvements in and relating to conditional handover in a telecommunications network
EP3846536A4 (en) * 2018-08-27 2022-01-26 Sharp Kabushiki Kaisha METHOD IMPLEMENTED BY USER EQUIPMENT, USER EQUIPMENT AND TRANSFER SETPOINT GENERATION METHOD
EP3923627A4 (en) * 2019-03-15 2022-02-23 Guangdong Oppo Mobile Telecommunications Corp., Ltd. METHOD, DEVICE, NETWORK DEVICE, TERMINAL AND STORAGE MEDIUM
WO2022141470A1 (en) * 2020-12-31 2022-07-07 Lenovo (Beijing) Limited Method and apparatus for performing handover procedure
EP3895471A4 (en) * 2018-12-10 2022-08-10 Qualcomm Incorporated SIGNALING OF CONDITIONAL INTERCELLULAR TRANSFER PROCEDURE
EP4017114A4 (en) * 2019-08-14 2022-10-19 Vivo Mobile Communication Co., Ltd. TRANSFER SETUP METHOD, NETWORK DEVICE, TERMINAL EQUIPMENT AND RECORDING MEDIA

Families Citing this family (39)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102375440B1 (ko) * 2017-09-28 2022-03-17 광동 오포 모바일 텔레커뮤니케이션즈 코포레이션 리미티드 무선 통신 방법 및 단말기 디바이스
CN110351789A (zh) * 2018-04-03 2019-10-18 维沃移动通信有限公司 用于小区变换的方法和设备
US11438812B2 (en) * 2018-07-10 2022-09-06 Qualcomm Incorporated Performing a combination of handover techniques
CN112823543A (zh) * 2018-08-08 2021-05-18 诺基亚技术有限公司 条件交换中的信令改进
CN112567814B (zh) * 2018-08-08 2024-03-26 索尼公司 基础设施设备、通信装置和方法
CN110831081B (zh) * 2018-08-10 2022-01-28 展讯通信（上海）有限公司 切换信息上报、切换鲁棒性优化方法及装置、存储介质、用户设备、基站
CN110839258B (zh) * 2018-08-17 2021-09-21 展讯通信（上海）有限公司 条件切换方法及装置
WO2020056880A1 (zh) * 2018-09-17 2020-03-26 Oppo广东移动通信有限公司 一种连接释放方法、数据处理方法、设备及存储介质
CN110972223A (zh) * 2018-09-28 2020-04-07 电信科学技术研究院有限公司 一种链路释放方法、装置、终端及第二网络实体
WO2020087432A1 (en) * 2018-11-01 2020-05-07 Apple Inc. Conditional handovers and cell re-selections along known routes
CN112042226B (zh) * 2018-12-07 2022-02-15 Oppo广东移动通信有限公司 基站的切换方法、设备及存储介质
US11064402B2 (en) * 2018-12-18 2021-07-13 Lg Electronics Inc. Method and apparatus for releasing a mobility configuration without a signal from a network in a wireless communication system
US20220070740A1 (en) * 2019-01-11 2022-03-03 Nec Corporation Radio access network node, radio terminal, and method therefor
WO2020145778A1 (en) * 2019-01-11 2020-07-16 Lg Electronics Inc. Method and apparatus for performing mobility in wireless communication system
WO2020150643A1 (en) * 2019-01-17 2020-07-23 Apple Inc. System and method to avoid user equipment triggering a measurement report after exit of conditional handover
CN113056935A (zh) 2019-01-31 2021-06-29 Oppo广东移动通信有限公司 用于切换网络设备的方法和终端设备
CN111586773A (zh) * 2019-02-19 2020-08-25 中国移动通信有限公司研究院 切换方法、装置及通信设备
WO2020197471A1 (en) * 2019-03-28 2020-10-01 Telefonaktiebolaget Lm Ericsson (Publ) Conditional mobility in a wireless communication network
CN111866937B (zh) * 2019-04-26 2023-07-21 中国移动通信有限公司研究院 信息上报及接收方法、装置、相关设备及存储介质
CN112806063B (zh) * 2019-04-30 2024-01-26 Oppo广东移动通信有限公司 用于小区切换的方法及设备
CN112789889B (zh) * 2019-05-09 2023-11-14 Oppo广东移动通信有限公司 一种无线资源控制消息的处理方法、设备及存储介质
CN112789891B (zh) * 2019-06-14 2023-03-21 Oppo广东移动通信有限公司 无线通信方法、装置和终端设备
CN112105064B (zh) * 2019-06-17 2022-09-13 中国移动通信有限公司研究院 切换方法、指示方法、终端及网络侧设备
WO2021000271A1 (zh) * 2019-07-02 2021-01-07 Oppo广东移动通信有限公司 条件切换方法、装置、计算机设备和存储介质
CN112243273A (zh) * 2019-07-16 2021-01-19 夏普株式会社 信息上报方法及对应的用户设备
US20220377633A1 (en) * 2019-07-17 2022-11-24 Telefonaktiebolaget Lm Ericsson (Publ) Conditional Configuration in a Wireless Communication Network
WO2021015659A1 (en) * 2019-07-19 2021-01-28 Telefonaktiebolaget Lm Ericsson (Publ) Conditional configuration in a wireless communication network
US11399326B2 (en) * 2019-08-12 2022-07-26 Samsung Electronics Co., Ltd. Methods and systems for handling conditional handover (CHO) in a wireless communication network
WO2021031189A1 (zh) * 2019-08-22 2021-02-25 Oppo广东移动通信有限公司 无线通信方法、终端设备和网络设备
US11395190B2 (en) * 2019-08-23 2022-07-19 Qualcomm Incorporated Full configuration handover techniques
EP4037425A4 (en) * 2019-09-27 2023-06-28 Beijing Xiaomi Mobile Software Co., Ltd. Link failure information processing method and electronic device
EP4046423A1 (en) * 2019-11-07 2022-08-24 Google LLC Conditional operations with a suspended radio connection
WO2021102650A1 (zh) * 2019-11-25 2021-06-03 北京小米移动软件有限公司 信息传输方法、装置及通信设备
EP4088510A4 (en) * 2020-01-10 2023-10-25 Lenovo (Beijing) Limited PROCEDURES FOR TROUBLESHOOTING IN CONDITIONAL HANDOVER
CN111345068B (zh) * 2020-02-11 2021-12-28 北京小米移动软件有限公司 数据通信方法、装置、通信设备及存储介质
CN113316200B (zh) * 2020-02-26 2022-05-13 大唐移动通信设备有限公司 一种条件同步重配置方法及装置
WO2021227048A1 (en) 2020-05-15 2021-11-18 Apple Inc. User equipment-triggered lower layer-based handover
US11736986B2 (en) * 2020-09-07 2023-08-22 Asustek Computer Inc. Method and apparatus for mobility procedure regarding MAC reset in a wireless communication system
CN117099467A (zh) * 2021-04-01 2023-11-21 谷歌有限责任公司 管理状态转变之前和之后的数据通信

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008035935A1 (en) * 2006-09-20 2008-03-27 Samsung Electronics Co., Ltd. Handover method and apparatus in a mobile communication system
CN101179843A (zh) * 2006-11-06 2008-05-14 华为技术有限公司 一种分组切换方法和通讯设备
CN102264093A (zh) * 2010-05-31 2011-11-30 株式会社Ntt都科摩 一种切换方法、移动终端及基站
CN103718604A (zh) * 2011-06-21 2014-04-09 诺基亚公司 提供优化的切换预备和执行操作的方法、装置和计算机程序产品
CN103945467A (zh) * 2014-04-21 2014-07-23 大唐移动通信设备有限公司 小区切换方法及系统、基站、终端
CN105580427A (zh) * 2013-07-31 2016-05-11 松下电器（美国）知识产权公司 移动通信系统中的切换过程

Family Cites Families (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3764146B2 (ja) * 2003-02-07 2006-04-05 株式会社東芝 無線機における基地局の選択方法、無線機及び制御回路
JP4843008B2 (ja) * 2007-11-21 2011-12-21 株式会社エヌ・ティ・ティ・ドコモ 移動局及び移動通信方法
WO2010113490A1 (ja) * 2009-03-31 2010-10-07 パナソニック株式会社 無線通信装置、無線通信基地局、及び無線通信システム
CN102055700B (zh) * 2009-10-28 2015-06-03 中兴通讯股份有限公司 载波聚合中分量载波配置的方法及装置
CN102056256B (zh) * 2009-11-05 2015-05-13 中兴通讯股份有限公司 切换能力处理方法、装置和系统
JP4772910B1 (ja) * 2010-04-05 2011-09-14 株式会社エヌ・ティ・ティ・ドコモ 移動通信システムにおける基地局及び方法
KR101306741B1 (ko) * 2010-04-12 2013-09-11 엘지전자 주식회사 광대역 무선 접속 시스템에서 효율적인 세컨더리 캐리어 정보 갱신 방법
US20110299429A1 (en) * 2010-06-02 2011-12-08 Kundan Tiwari Methods for handling ps and cs communication service
JP5499006B2 (ja) * 2010-11-02 2014-05-21 創新音▲速▼股▲ふん▼有限公司 無線通信システムのハンドオーバー中のセカンダリセル解放の方法及び装置
CN102387532B (zh) * 2011-01-10 2013-12-04 华为技术有限公司 频点信息处理方法和用户设备
WO2012127600A1 (ja) * 2011-03-22 2012-09-27 富士通株式会社 無線基地局、無線通信システム、通信制御方法及び無線端末
WO2013025539A1 (en) * 2011-08-12 2013-02-21 Interdigital Patent Holdings, Inc. Systems and/or methods for providing mobility robustness in heterogeneous network and small cell deployments
KR20140116156A (ko) * 2012-01-20 2014-10-01 후지쯔 가부시끼가이샤 링크 실패의 원인을 분석하는 방법, 및 네트워크 최적화 방법 및 장치
US9693265B2 (en) * 2012-01-26 2017-06-27 Nokia Technologies Oy Method and apparatus for mobile terminal mobility
US9414273B2 (en) * 2012-08-08 2016-08-09 At&T Intellectual Property I, L.P. Inbound handover for macrocell-to-femtocell call transfer
US9288720B2 (en) * 2012-10-08 2016-03-15 Apple Inc. Dynamic network cell reselection after a failed handover
US20150282033A1 (en) * 2012-10-26 2015-10-01 Nokia Technologies Oy Reversible handover
KR102056662B1 (ko) * 2012-12-06 2019-12-17 한국전자통신연구원 셀간 간섭 제어 방법 및 장치
CN104349403A (zh) * 2013-08-01 2015-02-11 中兴通讯股份有限公司 预切换处理方法、装置、用户设备及小区
CN104871577B (zh) * 2013-10-25 2019-02-19 华为技术有限公司 业务切换的方法、网络设备和用户设备
US9955397B2 (en) * 2014-01-08 2018-04-24 Huawei Device (Dongguan) Co., Ltd. Cell handover method and terminal
JP2015146541A (ja) * 2014-02-04 2015-08-13 富士通株式会社 移動無線装置、移動通信システム、及びセル選択制御プログラム
US9467921B2 (en) * 2014-05-08 2016-10-11 Intel IP Corporation Systems, devices, and methods for long term evolution and wireless local area interworking
WO2017135417A1 (ja) * 2016-02-03 2017-08-10 京セラ株式会社 無線端末及び基地局

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008035935A1 (en) * 2006-09-20 2008-03-27 Samsung Electronics Co., Ltd. Handover method and apparatus in a mobile communication system
CN101179843A (zh) * 2006-11-06 2008-05-14 华为技术有限公司 一种分组切换方法和通讯设备
CN102264093A (zh) * 2010-05-31 2011-11-30 株式会社Ntt都科摩 一种切换方法、移动终端及基站
CN103718604A (zh) * 2011-06-21 2014-04-09 诺基亚公司 提供优化的切换预备和执行操作的方法、装置和计算机程序产品
CN105580427A (zh) * 2013-07-31 2016-05-11 松下电器（美国）知识产权公司 移动通信系统中的切换过程
CN103945467A (zh) * 2014-04-21 2014-07-23 大唐移动通信设备有限公司 小区切换方法及系统、基站、终端

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3846536A4 (en) * 2018-08-27 2022-01-26 Sharp Kabushiki Kaisha METHOD IMPLEMENTED BY USER EQUIPMENT, USER EQUIPMENT AND TRANSFER SETPOINT GENERATION METHOD
US11678238B2 (en) 2018-08-27 2023-06-13 Sharp Kabushiki Kaisha Method performed by user equipment, user equipment, and handover command generation method
WO2020091662A1 (en) * 2018-11-01 2020-05-07 Telefonaktiebolaget Lm Ericsson (Publ) Mobility procedure
TWI818130B (zh) * 2018-12-10 2023-10-11 美商高通公司 有條件的交遞程序信號傳遞
EP3895471A4 (en) * 2018-12-10 2022-08-10 Qualcomm Incorporated SIGNALING OF CONDITIONAL INTERCELLULAR TRANSFER PROCEDURE
WO2020128966A1 (en) * 2018-12-19 2020-06-25 Telefonaktiebolaget Lm Ericsson (Publ) Suspend-resume in conditional handover
CN113228736B (zh) * 2018-12-19 2024-03-29 瑞典爱立信有限公司 条件切换中的暂停-恢复
CN113228736A (zh) * 2018-12-19 2021-08-06 瑞典爱立信有限公司 条件切换中的暂停-恢复
US11895545B2 (en) 2018-12-19 2024-02-06 Telefonaktiebolaget Lm Ericsson (Publ) Suspend-resume in conditional handover
WO2020188447A1 (en) * 2019-03-15 2020-09-24 Telefonaktiebolaget Lm Ericsson (Publ) Storing and restoring conditional handover in suspend-resume
EP3923627A4 (en) * 2019-03-15 2022-02-23 Guangdong Oppo Mobile Telecommunications Corp., Ltd. METHOD, DEVICE, NETWORK DEVICE, TERMINAL AND STORAGE MEDIUM
EP4017114A4 (en) * 2019-08-14 2022-10-19 Vivo Mobile Communication Co., Ltd. TRANSFER SETUP METHOD, NETWORK DEVICE, TERMINAL EQUIPMENT AND RECORDING MEDIA
GB2589189A (en) * 2019-08-16 2021-05-26 Samsung Electronics Co Ltd Improvements in and relating to conditional handover in a telecommunications network
WO2022141470A1 (en) * 2020-12-31 2022-07-07 Lenovo (Beijing) Limited Method and apparatus for performing handover procedure

Also Published As

Publication number Publication date
EP3562209A1 (en) 2019-10-30
EP3562209C0 (en) 2023-10-04
US20190380081A1 (en) 2019-12-12
CN108243469A (zh) 2018-07-03
US11818620B2 (en) 2023-11-14
EP3562209A4 (en) 2020-10-07
EP3562209B1 (en) 2023-10-04
CN108243469B (zh) 2021-07-16
US20240015626A1 (en) 2024-01-11

Similar Documents

Publication Publication Date Title
WO2018113661A1 (zh) 用户移动性方法和设备
WO2018113655A1 (zh) 用户移动性方法和设备
WO2021008478A1 (zh) 信息上报方法及对应的用户设备
WO2021228137A1 (zh) 小区变更方法以及用户设备
US20230164866A1 (en) Radio link failure reporting method and user equipment
JP7349964B2 (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
US9357459B2 (en) Method and apparatus for cross link establishment
WO2020063666A1 (zh) 用户设备及其执行的方法、基站及其执行的方法、移动控制实体及其执行的方法
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
WO2022127731A1 (zh) 小区变更方法以及用户设备
US20230388891A1 (en) Managing ue information after preparing a conditional mobility procedure
WO2020221193A1 (zh) 条件切换方法及对应的用户设备
WO2021027931A1 (zh) 小区切换方法以及用户设备
CN111989982A (zh) 处理拒绝等待时间的方法和装置
WO2020192730A1 (zh) 用户设备及其执行的预配置上行资源发送方法
WO2021254197A1 (zh) 由用户设备执行的方法以及用户设备
WO2023040955A1 (zh) 切换信息报告方法以及用户设备
WO2020241429A1 (ja) 通信制御方法及びユーザ装置
US11968612B2 (en) Data routing in radio access network
WO2023246770A1 (zh) 由用户设备执行的方法以及用户设备
WO2022237612A1 (zh) 网络转换方法以及用户设备
WO2022257974A1 (zh) 切换信息报告方法、用户设备以及通信系统
WO2024094056A1 (zh) 信息报告方法以及用户设备
WO2024017237A1 (zh) 由用户设备执行的方法以及用户设备
WO2023241622A1 (zh) 由用户设备执行的方法、用户设备以及信息报告方法

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: 17885333

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

ENP Entry into the national phase

Ref document number: 2017885333

Country of ref document: EP

Effective date: 20190723