WO2018045865A1 - 一种基站切换方法及装置 - Google Patents

一种基站切换方法及装置 Download PDF

Info

Publication number
WO2018045865A1
WO2018045865A1 PCT/CN2017/098090 CN2017098090W WO2018045865A1 WO 2018045865 A1 WO2018045865 A1 WO 2018045865A1 CN 2017098090 W CN2017098090 W CN 2017098090W WO 2018045865 A1 WO2018045865 A1 WO 2018045865A1
Authority
WO
WIPO (PCT)
Prior art keywords
base station
handover
random access
duration
downlink data
Prior art date
Application number
PCT/CN2017/098090
Other languages
English (en)
French (fr)
Inventor
方建民
吴昱民
Original Assignee
中兴通讯股份有限公司
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 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Publication of WO2018045865A1 publication Critical patent/WO2018045865A1/zh

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point

Definitions

  • the present application relates to the field of communications, and in particular, to a base station handover method and apparatus.
  • the user in order to ensure the quality of the service, the user is provided with a good service experience.
  • the terminal UE, User Equipment
  • the UE After the terminal (UE, User Equipment) establishes a connection with the network in a certain cell, the UE still needs the signal quality of the serving cell and the neighboring cell. Measurements are made to select the appropriate base station for handover to meet mobility requirements.
  • a source base station determines to perform a handover procedure on a UE, and sends a handover request to a target base station; the target base station agrees to reserve resources after handover, and responds to the handover response to the source base station; After receiving the handover response, the source base station sends an RRC (Radio Resource Control) connection reconfiguration command to notify the UE to perform handover; the UE receives the RRC connection reconfiguration command (point A in FIG. 1), and disconnects from the source base station.
  • the communication connection starts the random access process to the target base station; after the random access procedure is successfully completed, the UE sends an RRC reconfiguration complete message to the target base station.
  • the UE can perform data transmission and reception through the target base station (point B in FIG. 1).
  • the switching process ends.
  • the UE cannot communicate with the source base station and the target base station normally, which is called the interruption time of the handover.
  • the longer the interruption time of the handover the greater the impact on the transmission of data traffic between the UE and the base station.
  • a base station handover method including: a source base station sends a handover command to a terminal UE, where the handover command carries a preset duration, where the duration is used to indicate that the UE receives the handover Commanding, maintaining a communication connection with the source base station for the duration; the source base station transmitting a first downlink data status report to the target base station at a predetermined time before the duration expires, and starting to send a downlink to the target base station data.
  • a base station handover method including: receiving, by a target base station, a first downlink data status report sent by a source base station at a predetermined time before termination of a preset duration, and from the predetermined moment
  • the downlink data that is started to be sent, the duration is used to indicate that the terminal UE maintains a communication connection with the source base station for the duration of time after receiving the handover command sent by the source base station; and the target base station receives the handover completed by the UE.
  • the downlink data is sent to the UE according to the first downlink data status report.
  • a base station switching apparatus which is applied to a source base station, and includes: a command module, configured to send a handover command to a terminal UE, where the handover command carries a preset duration, the duration And the forwarding module is configured to: after the receiving the handover command, maintain a communication connection with the source base station for the duration; and the forwarding module is configured to send the first downlink to the target base station at a predetermined time before the duration is terminated.
  • the data status report is sent and the downlink data is sent to the target base station.
  • a base station switching apparatus which is applied to a target base station, and includes: a receiving module, configured to receive a first downlink data state that is sent by a source base station at a predetermined time before a preset duration expires. Reporting, and downlink data sent from the scheduled moment, the duration is used to indicate that the terminal UE maintains a communication connection with the source base station for the duration of time after receiving the handover command sent by the source base station; After receiving the handover complete command sent by the UE, according to the first downlink data state The report sends the downlink data to the UE.
  • the source base station sends a handover command to the terminal UE, where the handover command carries a preset duration, where the duration is used to indicate that the UE keeps with the source for the duration of time after receiving the handover command.
  • the communication connection of the base station the source base station sends a first downlink data status report to the target base station at a predetermined time before the termination of the duration, and starts to send downlink data to the target base station, which can reduce the interruption time of the UE during the base station handover process. To ensure the transmission of data services between the UE and the base station.
  • FIG. 1 is a schematic diagram of a handover procedure according to the related art.
  • FIG. 2 is a flowchart of a method for handover of a base station according to Embodiment 1 of the present application.
  • FIG. 3 is a flowchart of a method for handover of a base station according to Embodiment 3 of the present application.
  • FIG. 4 is a block diagram of a base station switching apparatus according to Embodiment 5 of the present application.
  • FIG. 5 is a block diagram of a base station switching apparatus according to Embodiment 6 of the present application.
  • FIG. 6 is a schematic diagram of an interaction process of a base station handover method according to an example 1 of the present application.
  • FIG. 7 is a schematic diagram of an interaction process of a base station handover method according to an example 2 of the present application.
  • the random access procedure refers to a process before a terminal access UE sends a random access request (ie, a random access preamble Random Access Preamble) to start an attempt to access the network to establish a basic signaling connection with the network.
  • a random access request ie, a random access preamble Random Access Preamble
  • the embodiments of the present application may be implemented in a Long Term Evolution (LTE) system (including but not limited to an LTE system).
  • the network architecture of the system may include a network side device (such as a base station) and a UE, wherein an interface between the base station and the base station is referred to as an X2 interface.
  • a base station handover method that can be operated on the foregoing network architecture is provided. It should be noted that the operating environment of the foregoing base station handover method provided in this embodiment of the present application is not limited to the foregoing network architecture.
  • FIG. 2 is a flowchart of a base station handover method according to Embodiment 1 of the present application.
  • the base station handover method in this embodiment is applied to a source base station.
  • the base station handover method includes:
  • Step S101 The source base station sends a handover request to the target base station, and receives a handover response sent by the target base station.
  • Step S102 The source base station sends a handover command to the terminal UE, where the handover command carries a preset duration, where the duration is used to indicate that the UE keeps with the source base station for the duration of time after receiving the handover command.
  • Step S103 The source base station sends a first downlink data status report to the target base station at a predetermined time before the termination of the duration, and starts to send downlink data to the target base station.
  • the UE starts from receiving the handover command
  • the communication connection with the source base station is maintained for a continuous time without being directly interrupted; further, the source base station sends a first downlink data status report to the target base station in advance at a predetermined time before the termination of the duration, and starts to send to the target base station.
  • the downlink data enables the target base station to obtain the first downlink data status report and the downlink data in advance, and sends downlink data to the UE as soon as possible after the communication connection between the source base station and the UE is interrupted, thereby reducing the interruption time in the handover process.
  • step S101 after receiving the measurement report of the UE, the source base station determines that the UE needs to be handed over from the source base station to the target base station, and then can send a handover request (Handover Request) to the target base station.
  • a handover request Handover Request
  • the target base station agrees to the handover request, it responds to the source base station with a Handover Request Acknowledge.
  • the handover command described in step S102 is used to notify the UE to switch from the source base station to the target base station.
  • the handover command may be an RRC Connection Reconfiguration message.
  • the duration may be preset by the source base station according to the signal strength of the UE, the distance between the UE and the source base station, and the target base station. For example, if the signal of the UE on the source base station is weak, the duration may not be too long. This duration can be, for example, 35 ms.
  • the duration is used to instruct the UE to maintain a communication connection with the source base station for the duration of time since receiving the handover command, and to disconnect the communication connection with the source base station when the duration expires.
  • the UE maintains a communication connection with the source base station for the duration of time after receiving the handover command, and when the duration expires, the UE disconnects the communication connection with the source base station, and sends a handover to the target base station.
  • Complete the command may be, for example, a random access request.
  • the UE can send a random access request, it indicates that the UE can receive downlink data.
  • the predetermined time before the termination of the duration in step S103 may be the distance duration Terminates the time when the X2 interface delay remains.
  • the source base station sends a first downlink data status report to the target base station and starts to send downlink data to the target base station at a time when the duration is terminated and the remaining X2 interface delay (for example, 10 ms) remains, and in the ideal case, the After the first downlink data status report is delayed by the X2 interface, it should arrive at the target base station just after the duration expires, and the downlink data also starts to reach the target base station one after the end of the duration.
  • the UE disconnects the communication connection with the source base station, and after receiving the handover complete command sent by the UE, the target base station may start sending downlink data to the UE according to the first downlink data status report, thereby The UE has no interruption time for handover.
  • the delay of the X2 interface may be inaccurate, and the first downlink data status report and the downlink data may arrive at the target base station earlier or later before the end of the duration after the delay of the X2 interface.
  • the target base station arrives at the target base station, the downlink data sent by the target base station to the UE may be sent to the UE before the source base station, and if the target base station arrives later, the downlink data is sent to the target base station to the UE after the duration is terminated. There will still be interruptions.
  • the X2 interface delay may be set to the maximum value of the X2 interface historical delay between the source base station and the target base station.
  • step S103 further includes the source base station transmitting a second downlink data status report to the target base station when the duration is terminated.
  • the second downlink data status report is sent when the communication connection between the source base station and the UE is disconnected, and may serve to update the first downlink data status report.
  • the target base station may send the downlink data to the UE more accurately according to the second downlink data status report.
  • the UE maintains the communication connection with the source base station for a duration of time after receiving the handover command, without directly interrupting; in addition, the source base station terminates the X2 interface delay after the distance duration expires. Transmitting a first downlink data status report to the target base station and starting to send downlink data to the target base station, and during the duration The second downlink data status report is sent to the target base station, and the target base station may send the downlink data to the UE according to the first downlink data status report and the second downlink data status report after receiving the random access request sent by the UE. , thereby reducing the interruption time during the switching process.
  • the base station handover method provided in the second embodiment of the present application is applied to a source base station.
  • the UE and the base station in the handover process involved in the embodiment, can support the handover without the random access procedure, and the implementation details of the steps of the foregoing method are as follows:
  • the handover request in step S101 includes no random access request, and the non-random access request is used to request the target base station to support handover without a random access procedure. Specifically, the duration may be carried in the no random access request.
  • the target base station receives the non-random access request (or receives the duration in the no-access request), it is necessary to determine whether to support the handover without the random access procedure. If the target base station supports handover without a random access procedure, the handover response includes no random access response and UE uplink grant information. The no random access response is used to indicate that the target base station supports handover without a random access procedure.
  • the UE uplink grant information may be allocated by the target base station according to the duration, for example, one or more subframes after the UE uplink grant is allocated as “the duration + X2 interface minimum delay”.
  • the minimum delay of the X2 interface may be a minimum value of the X2 interface historical delay between the source base station and the target base station.
  • the handover command described in step S102 is used to notify the UE to switch from the source base station to the target base station.
  • the handover command may be an RRC connection reconfiguration message.
  • the duration may be determined by the source base station according to the signal strength of the UE, the distance between the UE and the source base station, and the target base station. pre-setting. The duration is used to instruct the UE to maintain a communication connection with the source base station for the duration of time since receiving the handover command, and to disconnect the communication connection with the source base station when the duration expires.
  • the handover response received by the source base station includes no random access response
  • the handover command in step S102 further carries the non-random access response to notify the UE to perform the target base station. Switching of the random access procedure.
  • the handover command further carries the UE uplink authorization information.
  • the UE maintains a communication connection with the source base station for the duration of time after receiving the handover command, and does not initiate a random access procedure to the target base station according to the no-random access response.
  • the UE disconnects the communication connection with the source base station when the duration expires, and sends a handover complete command to the target base station according to the duration in the handover command and the UE uplink grant information.
  • the UE may send the handover complete command to the target base station at the time of the first UE uplink grant subframe after the duration is terminated.
  • the handover complete command may be, for example, an RRC Connection Reconfiguration Complete message.
  • the predetermined time before the termination of the duration in step S103 may be the time at which the distance duration expires and the X2 interface delay remains.
  • the X2 interface delay may be set to a maximum value of an X2 interface historical delay between the source base station and the target base station.
  • step S103 further includes the source base station transmitting a second downlink data status report to the target base station when the duration is terminated.
  • the UE maintains the communication connection with the source base station for a duration of time after receiving the handover command, without directly interrupting, and does not need to initiate a random access procedure to the target base station; Transmitting a first downlink data status report to the target base station at a time when the duration duration expires and remaining the X2 interface delay, and starts transmitting downlink data to the target base station, and then transmitting the downlink data to the target base station when the duration is terminated.
  • the second downlink data status report enables the target base station to send downlink data to the UE according to the first downlink data status report and/or the second downlink data status report after receiving the handover complete command sent by the UE, thereby reducing the interruption during the handover process. time.
  • FIG. 3 is a flowchart of a base station handover method according to Embodiment 2 of the present application.
  • the base station handover method in this embodiment is applied to a target base station.
  • the base station handover method includes:
  • Step S201 The target base station receives a handover request sent by the source base station, and sends a handover response to the source base station.
  • Step S202 The target base station receives a first downlink data status report sent by the source base station at a predetermined time before the preset duration expires, and downlink data sent from the predetermined time, where the duration is used to indicate the terminal UE Receiving a communication connection with the source base station for the duration of time after receiving the handover command sent by the source base station;
  • Step S203 After receiving the handover complete command sent by the UE, the target base station sends the downlink data to the UE according to the first downlink data state report.
  • the target base station may obtain the first downlink data status report and the downlink data in advance before the communication connection between the source base station and the UE is interrupted, and after the communication connection between the source base station and the UE is interrupted, the target base station may send according to the UE.
  • the handover complete command sends downlink data to the UE, reducing the interruption time during the handover process.
  • the target base station may further obtain a second downlink data report that is sent by the source base station when the communication connection with the UE is interrupted, and send the downlink data to the UE more accurately according to the second downlink data status report.
  • the predetermined time before the end of the duration in step S202 may be the distance duration The time when the delay of the remaining X2 interface is terminated.
  • the X2 interface delay may be a maximum value of the X2 interface historical delay between the source base station and the target base station.
  • step S203 further includes: receiving, by the target base station, a second downlink data status report that is sent by the source base station when the duration is terminated, and sending the downlink data to the UE according to the second downlink data status report.
  • the base station handover method provided in Embodiment 4 of the present application is applied to a target base station.
  • the UE and the base station can support the handover without the random access procedure, and the implementation details of the steps of the foregoing method are as follows:
  • the handover request in step S201 includes no random access request, and the non-random access request is used to request the target base station to support handover without a random access procedure. Specifically, the duration may be carried in the no random access request. If the target base station supports handover without a random access procedure, the handover response includes no random access response and UE uplink grant information. The no random access response is used to indicate that the target base station supports handover without a random access procedure. The UE uplink grant information may be allocated by the target base station according to the duration.
  • the handover command described in step S202 further carries the non-random access response to notify the UE to perform handover without a random access procedure to the target base station.
  • the handover command further carries the UE uplink authorization information.
  • the predetermined time before the termination of the duration may be the time at which the remaining X2 interface delay is terminated by the duration.
  • the X2 interface delay may be The maximum value of the X2 interface historical delay between the source base station and the target base station.
  • step S203 may be sent by the UE to the target base station according to the duration and the UE uplink grant information in the handover command, and the handover completion command may be, for example, an RRC connection reconfiguration complete message.
  • step S203 further includes: receiving, by the target base station, a second downlink data status report that is sent by the source base station when the duration is terminated, and sending the downlink data to the UE according to the second downlink data status report.
  • a fifth embodiment of the present application provides a base station switching apparatus 100, which includes a requesting module 101, a command module 102, and a forwarding module 103.
  • the base station switching device 100 operates in a source base station.
  • each of the above modules refers to a computer program or program segment for performing one or more specific functions.
  • the distinction between the above modules does not mean that the actual program code must be separate.
  • the requesting module 101 is configured to send a handover request to the target base station, and receive a handover response sent by the target base station.
  • the command module 102 is configured to send a handover command to the terminal UE, where the handover command carries a preset duration, where the duration is used to indicate that the UE remains with the source for the duration of time after receiving the handover command.
  • the communication connection of the base station is configured to send a handover command to the terminal UE, where the handover command carries a preset duration, where the duration is used to indicate that the UE remains with the source for the duration of time after receiving the handover command.
  • the forwarding module 103 is configured to send a first downlink data status report to the target base station at a predetermined time before the duration is terminated, and start to send downlink data to the target base station.
  • the predetermined time before the termination of the duration may be the time at which the remaining X2 interface delay is terminated by the duration.
  • the X2 interface delay may be an X2 interface between the source base station and the target base station. The maximum value of the historical delay.
  • the forwarding module 103 is further configured to send a second downlink data status report to the target base station when the duration is terminated.
  • the UE and the base station can support handover without a random access procedure.
  • the handover request includes no random access request, and the non-random access request is used to request the target base station to support handover without a random access procedure.
  • the duration may also be carried in the no random access request.
  • the handover response includes no random access response and UE uplink grant information, and the no-random access response is used to indicate that the target base station supports handover without a random access procedure.
  • the UE uplink grant information may be allocated by the target base station according to the duration.
  • the handover command further carries the non-random access response and the uplink grant information of the UE.
  • the UE maintains the communication connection with the source base station for the duration of time after receiving the handover command without directly interrupting; further, the source base station is at a predetermined time before the termination of the duration Sending a first downlink data status report to the target base station in advance, and starting to send downlink data to the target base station, so that the target base station can obtain the first downlink data status report and downlink data in advance, and communicate with the source base station and the UE.
  • the downlink data is sent to the UE as soon as possible after the connection is interrupted, thereby reducing the interruption time during the handover process.
  • a fifth embodiment of the present application provides a base station switching apparatus 200, which includes a response module 201, a receiving module 202, and a sending module 203.
  • the base station switching device 200 operates on a target base station.
  • each module mentioned above refers to a computer.
  • the distinction between the above modules does not mean that the actual program code must be separate.
  • the response module 201 is configured to receive a handover request sent by the source base station, and send a handover response to the source base station.
  • the receiving module 202 is configured to receive a first downlink data status report that is sent by the source base station at a predetermined time before the preset duration expires, and downlink data that is sent from the predetermined time, where the duration is used to indicate the terminal UE.
  • the communication connection with the source base station is maintained for the duration of time since receiving the handover command sent by the source base station.
  • the predetermined time before the termination of the duration may be the time at which the remaining X2 interface delay is terminated by the duration.
  • the X2 interface delay may be a maximum value of the X2 interface historical delay between the source base station and the target base station.
  • the sending module 203 is configured to: after receiving the handover complete command sent by the UE, send the downlink data to the UE according to the first downlink data status report.
  • the handover complete command may be a random access request.
  • the sending module 203 is further configured to receive a second downlink data status report that is sent by the source base station when the duration expires, and send the downlink data to the UE according to the second downlink data status report.
  • the UE and the base station can support handover without a random access procedure.
  • the handover request includes no random access request, and the non-random access request is used to request the target base station to support handover without a random access procedure.
  • the duration may also be carried in the no random access request.
  • the handover response includes no random access response and UE uplink grant information, and the no-random access response is used to indicate that the target base station supports handover without a random access procedure.
  • the UE uplink grant information may be allocated by the target base station according to the duration.
  • the handover command further carries the non-random access response and the uplink grant information of the UE.
  • the handover completion command is sent by the UE according to the uplink authorization information of the UE. give away.
  • the handover complete command may be a radio resource control RRC Connection Reconfiguration Complete message.
  • the base station switching device 200 can obtain the first downlink data status report and the downlink data in advance before the communication connection between the source base station and the UE is interrupted, and after the communication connection between the source base station and the UE is interrupted, the target base station can send according to the UE.
  • the handover completion command sends downlink data to the UE, reducing the interruption time during the handover process.
  • the target base station may further obtain a second downlink data report that is sent by the source base station when the communication connection with the UE is interrupted, and send the downlink data to the UE more accurately according to the second downlink data status report.
  • FIG. 6 is a schematic diagram of an interaction process of a base station handover method provided by specific example 1 of the present application.
  • the interaction process includes the following steps:
  • the source base station decides to handover the UE from the source base station to the target base station, and the source base station sends a handover request to the target base station;
  • the target base station receives and agrees to the handover request, and returns a handover response to the source base station;
  • the source eNB After receiving the handover response, the source eNB sends an RRC connection reconfiguration message to the UE, where the RRC connection reconfiguration message carries the preset duration.
  • the source base station maintains a communication connection with the UE during the duration
  • the UE receives the RRC connection reconfiguration message, and maintains a communication connection with the source base station for the duration;
  • the source base station sends a first downlink data status report to the target base station at the time of termination (duration-X2 interface delay), and starts to send downlink data to the target base station;
  • the source base station sends the second downlink data to the target base station at the time when the duration ends. State report
  • the UE disconnects the communication connection with the source base station when the duration expires, and initiates a random access request to the target base station;
  • the target base station After receiving the random access request, the target base station sends downlink data to the UE according to the first downlink data status report and/or the second downlink data status report.
  • FIG. 7 is a schematic diagram of an interaction process of a base station handover method provided by specific example 2 of the present application.
  • the interaction process includes the following steps:
  • the source base station decides to switch the UE from the source base station to the target base station, and the source base station sends a handover request to the target base station, where the handover request carries the random access request, or may carry the duration;
  • the target base station receives and agrees to the handover request, and returns a handover response to the source base station, where the handover response carries the random access response and the uplink grant information of the UE;
  • the source eNB After receiving the handover response, the source eNB sends an RRC connection reconfiguration message to the UE, where the RRC connection reconfiguration message carries the preset duration, the no-random access response, and the UE uplink grant information. ;
  • the source base station maintains a communication connection with the UE during the duration
  • the UE receives the RRC connection reconfiguration message, and maintains a communication connection with the source base station for the duration;
  • the source base station sends a first downlink data status report to the target base station at the time of termination (duration-X2 interface delay), and starts to send downlink data to the target base station;
  • the source base station sends a second downlink data status report to the target base station at the end of the duration
  • the UE disconnects the communication connection with the source base station when the duration is terminated, and sends an RRC connection reconfiguration complete message to the target base station according to the uplink grant information.
  • the target base station After receiving the RRC connection reconfiguration complete message, the target base station sends downlink data to the UE according to the first downlink data status report and/or the second downlink data status report.
  • Embodiments of the present application also provide a storage medium.
  • the foregoing storage medium may be configured to store program code for performing the following steps:
  • Step S101 The source base station sends a handover request to the target base station, and receives a handover response sent by the target base station.
  • Step S102 The source base station sends a handover command to the terminal UE, where the handover command carries a preset duration, where the duration is used to indicate that the UE keeps with the source base station for the duration of time after receiving the handover command.
  • Step S103 The source base station sends a first downlink data status report to the target base station at a predetermined time before the duration ends, and starts to send downlink data to the target base station.
  • the foregoing storage medium may include, but not limited to, a USB flash drive, a Read-Only Memory (ROM), a Random Access Memory (RAM), a mobile hard disk, and a magnetic memory.
  • ROM Read-Only Memory
  • RAM Random Access Memory
  • a mobile hard disk e.g., a hard disk
  • magnetic memory e.g., a hard disk
  • the processor executes the method steps described in the foregoing embodiments according to the stored program code in the storage medium.
  • Embodiments of the present application also provide a storage medium.
  • the foregoing storage medium may be configured to store program code for performing the following steps:
  • Step S201 The target base station receives a handover request sent by the source base station, and sends a handover response to the source base station.
  • Step S202 The target base station receives a first downlink data status report sent by the source base station at a predetermined time before the preset duration expires, and downlink data sent from the predetermined time, where the duration is used to indicate the terminal UE Receiving a communication connection with the source base station for the duration of time after receiving the handover command sent by the source base station;
  • Step S203 After receiving the handover complete command sent by the UE, the target base station sends the downlink data to the UE according to the first downlink data state report.
  • the foregoing storage medium may include, but not limited to, a USB flash drive, a Read-Only Memory (ROM), a Random Access Memory (RAM), a mobile hard disk, and a magnetic memory.
  • ROM Read-Only Memory
  • RAM Random Access Memory
  • a mobile hard disk e.g., a hard disk
  • magnetic memory e.g., a hard disk
  • the processor executes the method steps described in the foregoing embodiments according to the stored program code in the storage medium.
  • modules or steps of the present application can be implemented by a general computing device, which can be concentrated on a single computing device or distributed in a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from The steps shown or described are performed sequentially, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated into a single integrated circuit module. Thus, the application is not limited to any particular combination of hardware and software.

Landscapes

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

Abstract

本申请涉及一种基站切换方法及装置，所述方法包括：源基站向终端UE发送切换命令，该切换命令携带有预设的持续时间，该持续时间用于指示UE自接收到该切换命令起，在所述持续时间内保持与所述源基站的通讯连接；源基站在所述持续时间终止前的预定时刻向目标基站发送第一下行数据状态报告，并开始向目标基站发送下行数据。利用本申请可以减少UE在基站切换过程中的中断时间，以保证UE与基站间数据业务的传输。

Description

一种基站切换方法及装置 技术领域
本申请涉及通信领域，特别涉及一种基站切换方法及装置。
背景技术
在移动通信系统中，为了保证业务质量，为用户提供良好的业务体验，当终端(UE，User Equipment)在某个小区与网络建立连接之后，UE仍然需要对服务小区和相邻小区的信号质量进行测量，以便选择合适的基站进行切换，满足移动性要求。
图1为根据相关技术的切换过程示意图，如图1所示，源基站决定对UE执行切换过程，发送切换请求给目标基站；目标基站同意进行切换后预留资源，回应切换响应给源基站；源基站收到切换响应后，发送RRC(Radio Resource Control，无线资源控制)连接重配置命令通知UE进行切换；UE收到RRC连接重配置命令(图1中A点)，断开与源基站的通讯连接，开始对目标基站进行随机接入过程；成功完成随机接入过程后，UE发送RRC重配置完成消息给目标基站，这时，UE可以通过目标基站进行数据收发(图1中B点)，切换过程结束。A点和B点之间，UE与源基站和目标基站都不能正常通讯，称为切换的中断时间。所述切换的中断时间越长，则对UE与基站间数据业务的传输造成的影响越大。
发明内容
有鉴于此，有必要提供一种基站切换方法及装置，可以减少UE在基站切换过程中的中断时间，以保证UE与基站间数据业务的传输。
根据本申请的一个实施例，提供了一种基站切换方法，包括：源基站向终端UE发送切换命令，该切换命令携带有预设的持续时间，该持续时间用于指示UE自接收到该切换命令起，在所述持续时间内保持与所述源基站的通讯连接；源基站在所述持续时间终止前的预定时刻向目标基站发送第一下行数据状态报告，并开始向目标基站发送下行数据。
根据本申请的另一个实施例，提供了一种基站切换方法，包括：目标基站接收源基站在预设的持续时间终止前的预定时刻发送的第一下行数据状态报告，以及从该预定时刻开始发送的下行数据，所述持续时间用于指示终端UE自接收到源基站发送的切换命令起，在所述持续时间内保持与源基站的通讯连接；目标基站在接收到UE发送的切换完成命令后，根据所述第一下行数据状态报告向UE发送所述下行数据。
根据本申请的另一实施例，提供了一种基站切换装置，应用于源基站，包括：命令模块，用于向终端UE发送切换命令，该切换命令携带有预设的持续时间，该持续时间用于指示UE自接收到该切换命令起，在所述持续时间内保持与所述源基站的通讯连接；转发模块，用于在所述持续时间终止前的预定时刻向目标基站发送第一下行数据状态报告，并开始向目标基站发送下行数据。
根据本申请的另一实施例，提供一种基站切换装置，应用于目标基站，包括：接收模块，用于接收源基站在预设的持续时间终止前的预定时刻发送的第一下行数据状态报告，以及从该预定时刻开始发送的下行数据，所述持续时间用于指示终端UE自接收到源基站发送的切换命令起，在所述持续时间内保持与源基站的通讯连接；发送模块，用于在接收到UE发送的切换完成命令后，根据所述第一下行数据状态 报告向UE发送所述下行数据。
通过本申请，源基站向终端UE发送切换命令，该切换命令携带有预设的持续时间，该持续时间用于指示UE自接收到该切换命令起，在所述持续时间内保持与所述源基站的通讯连接，源基站在所述持续时间终止前的预定时刻向目标基站发送第一下行数据状态报告，并开始向目标基站发送下行数据，可以减少UE在基站切换过程中的中断时间，以保证UE与基站间数据业务的传输。
为让本申请的上述和其他目的、特征和优点能更明显易懂，下文特举较佳实施例，并配合所附图式，作详细说明如下。
附图说明
图1为根据相关技术的切换过程示意图。
图2为本申请实施例一提供的基站切换方法的流程图。
图3为本申请实施例三提供的基站切换方法的流程图。
图4为本申请实施例五提供的基站切换装置的框图。
图5为本申请实施例六提供的基站切换装置的框图。
图6为本申请一实例1提供的基站切换方法的交互过程示意图。
图7为本申请一实例2提供的基站切换方法的交互过程示意图。
具体实施方式
为更进一步阐述本申请为实现预定申请目的所采取的技术手段及功效，以下结合附图及较佳实施例，对依据本申请的具体实施方式、结构、特征及其功效，详细说明如后。
需要说明的是，本申请的说明书和权利要求书及上述附图中的术 语“第一”、“第二”等是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。
随机接入过程是指从终端UE发送随机接入请求(即随机接入前导Random Access Preamble)开始尝试接入网络到与网络间建立起基本的信令连接之前的过程。
本申请实施例可以运行于长期演进系统(Long Term Evolution，简称为LTE)系统中，(包括但不限于LTE系统)。该系统的网络架构可以包括网络侧设备(例如基站)和UE，其中基站与基站之间的接口称为X2接口。在本实施例中提供了一种可运行于上述网络架构上的基站切换方法，需要说明的是，本申请实施例中提供的上述基站切换方法的运行环境并不限于上述网络架构。
实施例一
图2为本申请实施例一提供的一种基站切换方法的流程图，本实施例的基站切换方法应用于源基站。如图2所示，该基站切换方法包括：
步骤S101，源基站向目标基站发送切换请求，并接收该目标基站发送的切换响应；
步骤S102，源基站向终端UE发送切换命令，该切换命令携带有预设的持续时间，该持续时间用于指示UE自接收到该切换命令起，在所述持续时间内保持与所述源基站的通讯连接；
步骤S103，源基站在所述持续时间终止前的预定时刻向目标基站发送第一下行数据状态报告，并开始向目标基站发送下行数据。
按照上述基站切换方法，UE自接收到所述切换命令起，在所述持 续时间内保持与源基站的通讯连接，而不必直接中断；此外，源基站在所述持续时间终止前的预定时刻就提前向目标基站发送第一下行数据状态报告，并开始向目标基站发送下行数据，使目标基站可以提前获得所述第一下行数据状态报告和下行数据，并在源基站与UE的通讯连接中断后尽早向UE发送下行数据，从而减少切换过程中的中断时间。
上述方法的各步骤的实现细节如下：
步骤S101中，源基站接收到UE的测量报告后，判定需要将UE从源基站切换至目标基站时，即可向目标基站发送切换请求(Handover Request)。目标基站同意该切换请求时，向源基站回复切换响应(Handover Request Acknowledge)。
步骤S102中所述的切换命令用于通知UE自源基站切换至目标基站。具体地，该切换命令可以为RRC连接重配置消息(RRC Connection Reconfiguration)。所述持续时间可以由源基站根据UE的信号强弱、UE与源基站和目标基站的距离等预先设定，例如若UE在源基站上的信号较弱，则该持续时间不能太长。该持续时间例如可以为35ms。该持续时间用于指示UE自接收到该切换命令起，在所述持续时间内保持与所述源基站的通讯连接，在所述持续时间终止时断开与所述源基站的通讯连接。
UE自接收到该切换命令起，在所述持续时间内保持与所述源基站的通讯连接，在所述持续时间终止时UE断开与所述源基站的通讯连接，并向目标基站发送切换完成命令。所述切换完成命令例如可以是随机接入请求。当UE可以发送随机接入请求时，说明UE已经可以接收下行数据了。
步骤S103中所述持续时间终止前的预定时刻可以为距离持续时间 终止还剩余X2接口时延的时刻。具体地，源基站在距离持续时间终止还剩余X2接口时延(例如10ms)的时刻，向目标基站发送第一下行数据状态报告，并开始向目标基站发送下行数据，理想情况下，所述第一下行数据状态报告经过X2接口时延后，应恰好在持续时间终止时到达目标基站，下行数据也会在持续时间终止时开始陆续到达目标基站。在持续时间终止时，UE断开与源基站的通讯连接，而目标基站可以在接收到UE发送的切换完成命令后，根据所述第一下行数据状态报告开始向UE发送下行数据，从而对UE而言无切换的中断时间。
实际中，所述X2接口时延可能不够精确，会造成第一下行数据状态报告和下行数据经过X2接口时延后，在持续时间终止前稍早或稍晚时刻到达目标基站。若稍早到达目标基站，则目标基站向UE发送的下行数据可能是源基站之前向UE发送过的，而若稍晚到达目标基站，则在持续时间终止后到目标基站向UE发送下行数据之间仍会有中断。为了保证X2接口时延的准确性，以尽量减少中断时间，所述X2接口时延可以设为所述源基站和目标基站间X2接口历史时延的最大值。
此外，步骤S103还包括源基站在所述持续时间终止时向目标基站发送第二下行数据状态报告。所述第二下行数据状态报告是在源基站与UE的通讯连接断开时发送的，可以起到对第一下行数据状态报告更新的作用。目标基站在收到第二下行数据状态报告后，可以根据第二下行数据状态报告更准确地向UE发送下行数据。
按照本实施例提供的基站切换方法，UE自接收到切换命令起，在持续时间内保持与源基站的通讯连接，而不必直接中断；此外，源基站在距离持续时间终止还剩余X2接口时延的时刻向目标基站发送第一下行数据状态报告，并开始向目标基站发送下行数据，以及在持续时 间终止时再向目标基站发送第二下行数据状态报告，使目标基站可以在接收到UE发送的随机接入请求后根据第一下行数据状态报告和第二下行数据状态报告向UE发送下行数据，从而减少切换过程中的中断时间。
实施例二
本申请实施例二提供的基站切换方法，应用于源基站。本申请实施例二相较于上述实施例一，在本实施例涉及的切换过程中，UE与基站间可以支持无随机接入过程的切换，由此上述方法的各步骤的实现细节如下：
步骤S101中所述的切换请求包括无随机接入请求，该无随机接入请求用于请求目标基站支持无随机接入过程的切换。具体地，该无随机接入请求中可以携带有所述持续时间。当目标基站接收到所述无随机接入请求(或接收到无随机接入请求中的所述持续时间)时，即需要判断是否支持无随机接入过程的切换。若目标基站支持无随机接入过程的切换，则所述切换响应包括无随机接入响应，以及UE上行授权信息。该无随机接入响应用于表示目标基站支持无随机接入过程的切换。所述UE上行授权信息可以由目标基站根据所述持续时间分配，例如分配UE上行授权为“所述持续时间+X2接口最小时延”之后的一个或多个子帧。所述X2接口最小时延可以为源基站与目标基站间X2接口历史时延的最小值。
步骤S102中所述的切换命令用于通知UE自源基站切换至目标基站。具体地，该切换命令可以为RRC连接重配置消息。所述持续时间可以由源基站根据UE的信号强弱、UE与源基站和目标基站的距离等 预先设定。该持续时间用于指示UE自接收到该切换命令起，在所述持续时间内保持与所述源基站的通讯连接，在所述持续时间终止时断开与所述源基站的通讯连接。
在本实施例中，源基站接收到的所述切换响应中包括无随机接入响应，步骤S102中所述的切换命令还携带有所述无随机接入响应，以通知UE对目标基站进行无随机接入过程的切换。此外，所述切换命令还携带有所述UE上行授权信息。
UE自接收到该切换命令起，在所述持续时间内保持与所述源基站的通讯连接，并根据所述无随机接入响应不发起对目标基站的随机接入过程。在所述持续时间终止时UE断开与所述源基站的通讯连接，并根据切换命令中的所述持续时间和UE上行授权信息向目标基站发送切换完成命令。例如，UE可以在持续时间终止后第1个UE上行授权子帧时刻向目标基站发送所述切换完成命令。所述切换完成命令例如可以是RRC连接重配置完成消息(RRC Connection Reconfiguration Complete)。
步骤S103中所述持续时间终止前的预定时刻可以为距离持续时间终止还剩余X2接口时延的时刻。所述X2接口时延可以设为所述源基站和目标基站间X2接口历史时延的最大值。此外，步骤S 103还包括源基站在所述持续时间终止时向目标基站发送第二下行数据状态报告。
按照本实施例提供的基站切换方法，UE自接收到切换命令起，在持续时间内保持与源基站的通讯连接，而不必直接中断，且无需向目标基站发起随机接入过程；此外，源基站在距离持续时间终止还剩余X2接口时延的时刻向目标基站发送第一下行数据状态报告，并开始向目标基站发送下行数据，以及在持续时间终止时再向目标基站发送第 二下行数据状态报告，使目标基站可以在接收到UE发送的切换完成命令后根据第一下行数据状态报告和/或第二下行数据状态报告向UE发送下行数据，从而减少切换过程中的中断时间。
实施例三
图3为本申请实施例二提供的一种基站切换方法的流程图，本实施例的基站切换方法应用于目标基站。如图3所示，该基站切换方法包括：
步骤S201，目标基站接收源基站发送的切换请求，并向该源基站发送切换响应；
步骤S202，目标基站接收源基站在预设的持续时间终止前的预定时刻发送的第一下行数据状态报告，以及从该预定时刻开始发送的下行数据，所述持续时间用于指示终端UE自接收到源基站发送的切换命令起，在所述持续时间内保持与源基站的通讯连接；
步骤S203，目标基站在接收到UE发送的切换完成命令后，根据所述第一下行数据状态报告向UE发送所述下行数据。
按照上述基站切换方法，目标基站在源基站与UE的通讯连接中断前就可以提前获得第一下行数据状态报告和下行数据，在源基站与UE的通讯连接中断后，即可根据UE发送的切换完成命令向UE发送下行数据，减少切换过程中的中断时间。此外，目标基站还可以进一步获取源基站在与UE的通讯连接中断时发送的第二下行数据报告，并根据该第二下行数据状态报告更准确地向UE发送下行数据。
上述方法的各步骤的实现细节如下：
步骤S202中所述持续时间终止前的预定时刻可以为距离持续时间 终止剩余X2接口时延的时刻。所述X2接口时延可以为所述源基站和目标基站间X2接口历史时延的最大值。
步骤S203中所述的切换完成命令可以为随机接入请求。此外，步骤S203还包括目标基站接收源基站在所述持续时间终止时发送的第二下行数据状态报告，并根据所述第二下行数据状态报告向UE发送所述下行数据。
此外，本实施例各步骤的具体实施细节可参考本申请实施例一提供的基站切换方法中的描述，此处不再赘述。
实施例四
本申请实施例四提供的基站切换方法，应用于目标基站。本申请实施例四相较于上述实施例三，本实施例涉及的切换过程中，UE与基站间可以支持无随机接入过程的切换，由此上述方法的各步骤的实现细节如下：
步骤S201中所述的切换请求包括无随机接入请求，该无随机接入请求用于请求目标基站支持无随机接入过程的切换。具体地，该无随机接入请求中可以携带有所述持续时间。若目标基站支持无随机接入过程的切换，则所述切换响应包括无随机接入响应，以及UE上行授权信息。该无随机接入响应用于表示目标基站支持无随机接入过程的切换。所述UE上行授权信息可以由目标基站根据所述持续时间分配。
步骤S202中所述的切换命令还携带有所述无随机接入响应，以通知UE对目标基站进行无随机接入过程的切换。此外，所述切换命令还携带有所述UE上行授权信息。所述持续时间终止前的预定时刻可以为距离持续时间终止剩余X2接口时延的时刻。所述X2接口时延可以为 所述源基站和目标基站间X2接口历史时延的最大值。
步骤S203所述的切换完成命令可以由UE根据切换命令中的所述持续时间和UE上行授权信息向目标基站发送，所述切换完成命令例如可以是RRC连接重配置完成消息。此外，步骤S203还包括目标基站接收源基站在所述持续时间终止时发送的第二下行数据状态报告，并根据所述第二下行数据状态报告向UE发送所述下行数据。
此外，本实施例各步骤的具体实施细节可参考本申请实施例二提供的基站切换方法中的描述，此处不再赘述。
实施例五
参阅图4所示，本申请实施例五提供一种基站切换装置100，其包括请求模块101、命令模块102和转发模块103。在本实施例中该基站切换装置100运行于源基站。可以理解，上述的各模块是指计算机程序或者程序段，用于执行某一项或多项特定的功能。此外，上述各模块的区分并不代表实际的程序代码也必须是分开的。
请求模块101，设置为向目标基站发送切换请求，并接收该目标基站发送的切换响应。
命令模块102，设置为向终端UE发送切换命令，该切换命令携带有预设的持续时间，该持续时间用于指示UE自接收到该切换命令起，在所述持续时间内保持与所述源基站的通讯连接。
转发模块103，设置为在所述持续时间终止前的预定时刻向目标基站发送第一下行数据状态报告，并开始向目标基站发送下行数据。所述持续时间终止前的预定时刻可以为距离持续时间终止剩余X2接口时延的时刻。所述X2接口时延可以为所述源基站和目标基站间X2接口 历史时延的最大值。所述转发模块103还用于在所述持续时间终止时向目标基站发送第二下行数据状态报告。
在另一实例涉及的切换过程中，UE与基站间可以支持无随机接入过程的切换。由此，所述切换请求包括无随机接入请求，该无随机接入请求用于请求目标基站支持无随机接入过程的切换。所述无随机接入请求中还可以携带有所述持续时间。所述切换响应包括无随机接入响应和UE上行授权信息，该无随机接入响应用于表示目标基站支持无随机接入过程的切换。所述UE上行授权信息可以由目标基站根据所述持续时间分配。所述切换命令还携带有所述无随机接入响应和所述UE上行授权信息。
上述模块的具体实施细节可参考本申请实施例一和实施例二提供的基站切换方法中的描述，此处不再赘述。
通过上述基站切换装置100，UE自接收到所述切换命令起，在所述持续时间内保持与源基站的通讯连接，而不必直接中断；此外，源基站在所述持续时间终止前的预定时刻就提前向目标基站发送第一下行数据状态报告，并开始向目标基站发送下行数据，使目标基站可以提前获得所述第一下行数据状态报告和下行数据，并在源基站与UE的通讯连接中断后尽早向UE发送下行数据，从而减少切换过程中的中断时间。
实施例六
参阅图5所示，本申请实施例五提供一种基站切换装置200，其包括应答模块201、接收模块202和发送模块203。在本实施例中该基站切换装置200运行于目标基站。可以理解，上述的各模块是指计算机 程序或者程序段，用于执行某一项或多项特定的功能。此外，上述各模块的区分并不代表实际的程序代码也必须是分开的。
应答模块201，设置为接收源基站发送的切换请求，并向该源基站发送切换响应。
接收模块202，设置为接收源基站在预设的持续时间终止前的预定时刻发送的第一下行数据状态报告，以及从该预定时刻开始发送的下行数据，所述持续时间用于指示终端UE自接收到源基站发送的切换命令起，在所述持续时间内保持与源基站的通讯连接。
所述持续时间终止前的预定时刻可以为距离持续时间终止剩余X2接口时延的时刻。所述X2接口时延可以为所述源基站和目标基站间X2接口历史时延的最大值。
发送模块203，设置为在接收到UE发送的切换完成命令后，根据所述第一下行数据状态报告向UE发送所述下行数据。所述切换完成命令可以为随机接入请求。此外，发送模块203还用于接收源基站在所述持续时间终止时发送的第二下行数据状态报告，并根据所述第二下行数据状态报告向UE发送所述下行数据。
在另一实例涉及的切换过程中，UE与基站间可以支持无随机接入过程的切换。由此，所述切换请求包括无随机接入请求，该无随机接入请求用于请求目标基站支持无随机接入过程的切换。所述无随机接入请求中还可以携带有所述持续时间。所述切换响应包括无随机接入响应和UE上行授权信息，该无随机接入响应用于表示目标基站支持无随机接入过程的切换。所述UE上行授权信息可以由目标基站根据所述持续时间分配。所述切换命令还携带有所述无随机接入响应和所述UE上行授权信息。所述切换完成命令由UE根据所述UE上行授权信息发 送。所述切换完成命令可以为无线资源控制RRC连接重配置完成消息。
上述模块的具体实施细节可参考本申请实施例三和实施例四提供的基站切换方法中的描述，此处不再赘述。
通过上述基站切换装置200，目标基站在源基站与UE的通讯连接中断前就可以提前获得第一下行数据状态报告和下行数据，在源基站与UE的通讯连接中断后，即可根据UE发送的切换完成命令向UE发送下行数据，减少切换过程中的中断时间。此外，目标基站还可以进一步获取源基站在与UE的通讯连接中断时发送的第二下行数据报告，并根据该第二下行数据状态报告更准确地向UE发送下行数据。
实例1
参阅图6所示，为本申请具体实例1提供的基站切换方法的交互过程示意图。所述交互过程包括以下步骤：
1、源基站决定将UE从源基站切换到目标基站，源基站向目标基站发送切换请求；
2、目标基站收到并同意该切换请求，向源基站回复切换响应；
3、源基站收到所述切换响应后，向UE发送RRC连接重配置消息，该RRC连接重配置消息中携带有预设的所述持续时间；
4、源基站在所述持续时间内保持与UE的通讯连接；
5、UE收到该RRC连接重配置消息，在所述持续时间内保持与源基站的通讯连接；
6、源基站在(持续时间-X2接口时延)终止时刻，向目标基站发送第一下行数据状态报告，并开始向目标基站发送下行数据；
7、源基站在持续时间终止时刻，向目标基站发送第二下行数据状 态报告；
8、UE在持续时间终止时断开与源基站的通讯连接，并向目标基站发起随机接入请求；
9、目标基站收到所述随机接入请求后，根据所述第一下行数据状态报告和/或第二下行数据状态报告向UE发送下行数据。
实例2
参阅图7所示，为本申请具体实例2提供的基站切换方法的交互过程示意图。所述交互过程包括以下步骤：
1、源基站决定将UE从源基站切换到目标基站，源基站向目标基站发送切换请求，该切换请求中携带有无随机接入请求，或者还可以携带有所述持续时间；
2、目标基站收到并同意该切换请求，向源基站回复切换响应，该切换响应中携带有无随机接入响应和UE上行授权信息；
3、源基站收到所述切换响应后，向UE发送RRC连接重配置消息，该RRC连接重配置消息中携带有预设的所述持续时间、所述无随机接入响应和UE上行授权信息；
4、源基站在所述持续时间内保持与UE的通讯连接；
5、UE收到该RRC连接重配置消息，在所述持续时间内保持与源基站的通讯连接；
6、源基站在(持续时间-X2接口时延)终止时刻，向目标基站发送第一下行数据状态报告，并开始向目标基站发送下行数据；
7、源基站在持续时间终止时刻，向目标基站发送第二下行数据状态报告；
8、UE在持续时间终止时断开与源基站的通讯连接，并根据所述上行授权信息向目标基站发送RRC连接重配置完成消息；
9、目标基站收到所述RRC连接重配置完成消息后，根据所述第一下行数据状态报告和/或第二下行数据状态报告向UE发送下行数据。
本申请的实施例还提供了一种存储介质。可选地，在本实施例中，上述存储介质可以被设置为存储用于执行以下步骤的程序代码：
步骤S101，源基站向目标基站发送切换请求，并接收该目标基站发送的切换响应；
步骤S102，源基站向终端UE发送切换命令，该切换命令携带有预设的持续时间，该持续时间用于指示UE自接收到该切换命令起，在所述持续时间内保持与所述源基站的通讯连接；
步骤S 103，源基站在所述持续时间终止前的预定时刻向目标基站发送第一下行数据状态报告，并开始向目标基站发送下行数据。
可选地，在本实施例中，上述存储介质可以包括但不限于：U盘、只读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、移动硬盘、磁碟或者光盘等各种可以存储程序代码的介质。
可选地，在本实施例中，处理器根据存储介质中已存储的程序代码执行上述实施例记载的方法步骤。
可选地，本实施例中的具体示例可以参考上述实施例一和实施例二及可选实施方式中所描述的示例，本实施例在此不再赘述。
本申请的实施例还提供了一种存储介质。可选地，在本实施例中，上述存储介质可以被设置为存储用于执行以下步骤的程序代码：
步骤S201，目标基站接收源基站发送的切换请求，并向该源基站发送切换响应；
步骤S202，目标基站接收源基站在预设的持续时间终止前的预定时刻发送的第一下行数据状态报告，以及从该预定时刻开始发送的下行数据，所述持续时间用于指示终端UE自接收到源基站发送的切换命令起，在所述持续时间内保持与源基站的通讯连接；
步骤S203，目标基站在接收到UE发送的切换完成命令后，根据所述第一下行数据状态报告向UE发送所述下行数据。
可选地，在本实施例中，上述存储介质可以包括但不限于：U盘、只读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、移动硬盘、磁碟或者光盘等各种可以存储程序代码的介质。
可选地，在本实施例中，处理器根据存储介质中已存储的程序代码执行上述实施例记载的方法步骤。
可选地，本实施例中的具体示例可以参考上述实施例三和实施例四及可选实施方式中所描述的示例，本实施例在此不再赘述。
显然，本领域的技术人员应该明白，上述的本申请的各模块或各步骤可以用通用的计算装置来实现，它们可以集中在单个的计算装置上，或者分布在多个计算装置所组成的网络上，可选地，它们可以用计算装置可执行的程序代码来实现，从而，可以将它们存储在存储装置中由计算装置来执行，并且在某些情况下，可以以不同于此处的顺 序执行所示出或描述的步骤，或者将它们分别制作成各个集成电路模块，或者将它们中的多个模块或步骤制作成单个集成电路模块来实现。这样，本申请不限制于任何特定的硬件和软件结合。

Claims (25)

  1. 一种基站切换方法，包括：
    源基站向终端UE发送切换命令，该切换命令携带有预设的持续时间，该持续时间用于指示UE自接收到该切换命令起，在所述持续时间内保持与所述源基站的通讯连接；
    源基站在所述持续时间终止前的预定时刻向目标基站发送第一下行数据状态报告，并开始向目标基站发送下行数据。
  2. 如权利要求1所述的基站切换方法，其中，所述持续时间终止前的预定时刻为距离持续时间终止剩余X2接口时延的时刻。
  3. 如权利要求2所述的基站切换方法，其中，所述X2接口时延为所述源基站和目标基站间X2接口历史时延的最大值。
  4. 如权利要求1所述的基站切换方法，其中，还包括：
    源基站在所述持续时间终止时向目标基站发送第二下行数据状态报告。
  5. 如权利要求1所述的基站切换方法，其中，在所述源基站向UE发送切换命令之前，还包括：
    源基站向目标基站发送切换请求，并接收该目标基站发送的切换响应；
    所述切换请求包括无随机接入请求，该无随机接入请求用于请求目标基站支持无随机接入过程的切换；
    所述切换响应包括无随机接入响应，该无随机接入响应用于表示目标基站支持无随机接入过程的切换；
    所述切换命令还携带有所述无随机接入响应。
  6. 如权利要求5所述的基站切换方法，其中，所述无随机接入响应中携带有UE上行授权信息，所述切换命令还携带有所述UE上行授 权信息。
  7. 如权利要求5所述的基站切换方法，其中，所述无随机接入请求中携带有所述持续时间。
  8. 一种基站切换方法，包括：
    目标基站接收源基站在预设的持续时间终止前的预定时刻发送的第一下行数据状态报告，以及从该预定时刻开始发送的下行数据，所述持续时间用于指示终端UE自接收到源基站发送的切换命令起，在所述持续时间内保持与源基站的通讯连接；
    目标基站在接收到UE发送的切换完成命令后，根据所述第一下行数据状态报告向UE发送所述下行数据。
  9. 如权利要求8所述的基站切换方法，其中，所述持续时间终止前的预定时刻为距离持续时间终止剩余X2接口时延的时刻。
  10. 如权利要求9所述的基站切换方法，其中，所述X2接口时延为所述源基站和目标基站间X2接口历史时延的最大值。
  11. 如权利要求8所述的基站切换方法，其中，还包括：
    目标基站接收源基站在所述持续时间终止时发送的第二下行数据状态报告，并根据所述第二下行数据状态报告向UE发送所述下行数据。
  12. 如权利要求8所述的基站切换方法，其中，所述目标基站接收源基站在预设的持续时间终止前的预定时刻发送的第一下行数据状态报告之前还包括：
    目标基站接收源基站发送的切换请求，并向该源基站发送切换响应；
    所述切换请求包括无随机接入请求，该无随机接入请求用于请求目标基站支持无随机接入过程的切换；
    所述切换响应包括无随机接入响应，该无随机接入响应用于表示目标基站支持无随机接入过程的切换；
    所述切换命令还携带有所述无随机接入响应。
  13. 如权利要求12所述的基站切换方法，其中，所述无随机接入响应中携带有UE上行授权信息，所述切换命令还携带有所述UE上行授权信息。
  14. 如权利要求12所述的基站切换方法，其中，所述无随机接入请求中携带有所述持续时间。
  15. 如权利要求14所述的基站切换方法，其中，所述无随机接入响应中携带有目标基站根据所述持续时间分配的UE上行授权信息，所述切换命令还携带有所述UE上行授权信息。
  16. 如权利要求13或15所述的基站切换方法，其中，所述目标基站接收UE发送的切换完成命令包括：
    所述目标基站接收UE根据所述UE上行授权信息发送的切换完成命令；
    所述切换完成命令为无线资源控制RRC连接重配置完成消息。
  17. 如权利要求8所述的基站切换方法，其中，所述切换完成命令为随机接入请求。
  18. 一种基站切换装置，应用于源基站，包括：
    命令模块，设置为向终端UE发送切换命令，该切换命令携带有预设的持续时间，该持续时间用于指示UE自接收到该切换命令起，在所述持续时间内保持与所述源基站的通讯连接；
    转发模块，设置为在所述持续时间终止前的预定时刻向目标基站发送第一下行数据状态报告，并开始向目标基站发送下行数据。
  19. 如权利要求18所述的基站切换装置，其中，所述转发模块还设置为：
    在所述持续时间终止时向目标基站发送第二下行数据状态报告。
  20. 如权利要求18所述的基站切换装置，其中，还包括：
    请求模块，设置为向目标基站发送切换请求，并接收该目标基站发送的切换响应；
    所述切换请求包括无随机接入请求，该无随机接入请求用于请求目标基站支持无随机接入过程的切换；
    所述切换响应包括无随机接入响应，该无随机接入响应用于表示目标基站支持无随机接入过程的切换；
    所述切换命令还携带有所述无随机接入响应。
  21. 一种基站切换装置，应用于目标基站，包括：
    接收模块，设置为接收源基站在预设的持续时间终止前的预定时刻发送的第一下行数据状态报告，以及从该预定时刻开始发送的下行数据，所述持续时间用于指示终端UE自接收到源基站发送的切换命令起，在所述持续时间内保持与源基站的通讯连接；
    发送模块，设置为在接收到UE发送的切换完成命令后，根据所述第一下行数据状态报告向UE发送所述下行数据。
  22. 如权利要求21所述的基站切换装置，其中，所述发送模块还设置为：
    接收源基站在所述持续时间终止时发送的第二下行数据状态报告，并根据所述第二下行数据状态报告向UE发送所述下行数据。
  23. 如权利要求21所述的基站切换装置，其中，还包括：
    应答模块，设置为接收源基站发送的切换请求，并向该源基站发 送切换响应；
    所述切换请求包括无随机接入请求，该无随机接入请求用于请求目标基站支持无随机接入过程的切换；
    所述切换响应包括无随机接入响应，该无随机接入响应用于表示目标基站支持无随机接入过程的切换；
    所述切换命令还携带有所述无随机接入响应。
  24. 一种存储介质，其特征在于，所述存储介质包括存储的程序，其中，所述程序运行时执行权利要求1至7中任一项所述的方法。
  25. 一种存储介质，其特征在于，所述存储介质包括存储的程序，其中，所述程序运行时执行权利要求8至17中任一项所述的方法。
PCT/CN2017/098090 2016-09-08 2017-08-18 一种基站切换方法及装置 WO2018045865A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201610815149.4 2016-09-08
CN201610815149.4A CN107809778A (zh) 2016-09-08 2016-09-08 一种基站切换方法及装置

Publications (1)

Publication Number Publication Date
WO2018045865A1 true WO2018045865A1 (zh) 2018-03-15

Family

ID=61562683

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2017/098090 WO2018045865A1 (zh) 2016-09-08 2017-08-18 一种基站切换方法及装置

Country Status (2)

Country Link
CN (1) CN107809778A (zh)
WO (1) WO2018045865A1 (zh)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113271640A (zh) * 2020-02-17 2021-08-17 中国电信股份有限公司 数据传输方法、基站和计算机可读存储介质
US20220141730A1 (en) * 2019-02-20 2022-05-05 Telefonaktiebolaget Lm Ericsson (Publ) Mobility between Cells in a Wireless Network

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4164293A1 (en) 2018-09-27 2023-04-12 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Timer-based processing method, terminal device, and network device
CN110972214A (zh) * 2018-09-28 2020-04-07 电信科学技术研究院有限公司 一种链路切换方法、网络实体及终端
WO2020164006A1 (zh) * 2019-02-13 2020-08-20 华为技术有限公司 切换网络设备的方法、终端设备和网络设备
CN113099495B (zh) * 2020-01-09 2022-04-15 大唐移动通信设备有限公司 一种信关站转换方法、装置、终端及信关站
CN113825189B (zh) * 2020-06-20 2023-05-16 华为技术有限公司 一种切换控制方法及通信装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101048001A (zh) * 2006-06-22 2007-10-03 华为技术有限公司 切换控制方法
EP1892977A1 (en) * 2006-08-21 2008-02-27 Nokia Siemens Networks Gmbh & Co. Kg Method for controlling a handover in a radio communications system
CN101467475A (zh) * 2006-06-09 2009-06-24 西门子公司 分组交换的切换的方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101467475A (zh) * 2006-06-09 2009-06-24 西门子公司 分组交换的切换的方法
CN101048001A (zh) * 2006-06-22 2007-10-03 华为技术有限公司 切换控制方法
EP1892977A1 (en) * 2006-08-21 2008-02-27 Nokia Siemens Networks Gmbh & Co. Kg Method for controlling a handover in a radio communications system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220141730A1 (en) * 2019-02-20 2022-05-05 Telefonaktiebolaget Lm Ericsson (Publ) Mobility between Cells in a Wireless Network
CN113271640A (zh) * 2020-02-17 2021-08-17 中国电信股份有限公司 数据传输方法、基站和计算机可读存储介质
CN113271640B (zh) * 2020-02-17 2023-09-29 中国电信股份有限公司 数据传输方法、基站和计算机可读存储介质

Also Published As

Publication number Publication date
CN107809778A (zh) 2018-03-16

Similar Documents

Publication Publication Date Title
WO2018045865A1 (zh) 一种基站切换方法及装置
WO2018196710A1 (zh) 一种小区切换、确定上行发送功率的方法及装置
US20170181044A1 (en) Method, base station, and dual connectivity system for providing services to handover of a user equipment
CN113615253B (zh) 到潜在目标节点的有条件切换执行概率信息
KR102147503B1 (ko) 통신 방법, 네트워크 측 장치 및 사용자 기기
EP2461626B1 (en) Key derivation
WO2019134506A1 (zh) 一种波束失败恢复方法、装置及设备
WO2017194021A1 (zh) 切换方法及装置
CN107708104B (zh) 辅基站变更的方法及装置
EP4391658A2 (en) Terminal state conversion method and apparatus
WO2018059299A1 (zh) 小区切换的方法、装置及系统和计算机存储介质
EP3416423B1 (en) Method of handling handover in dual connectivity
US10587757B2 (en) Method and apparatus for processing terminal that is performing voice service, and communications system
KR102133899B1 (ko) 핸드오버에서의 자원 구성을 위한 방법 및 디바이스
WO2013091515A1 (zh) 确定服务小区的定时提前量分组方法以及设备
WO2017193842A1 (zh) 小区切换方法、装置、系统及计算机存储介质
EP3165042B1 (en) A method for assisting a wireless device to perform uplink transmissions
US11277773B2 (en) Handover method and apparatus
JP2019537886A (ja) 方法、ユーザ機器装置、プロセッサ、及び基地局
US10993158B2 (en) Mobile terminal apparatus, base station apparatus, communication system, and communication control method
CN109845321B (zh) 切换期间的数据传输
WO2017166390A1 (zh) 一种通信方法、终端及网络设备
US11343738B2 (en) Handover-based connection resume technique
EP3965455B1 (en) Multi-cell configuration method and apparatus, storage medium, terminal and base station
CN111918272B (zh) 终端回落控制方法及装置

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: 17848038

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 17848038

Country of ref document: EP

Kind code of ref document: A1