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WO2017194021A1 - 切换方法及装置 - Google Patents

切换方法及装置 Download PDF

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Publication number
WO2017194021A1
WO2017194021A1 PCT/CN2017/084251 CN2017084251W WO2017194021A1 WO 2017194021 A1 WO2017194021 A1 WO 2017194021A1 CN 2017084251 W CN2017084251 W CN 2017084251W WO 2017194021 A1 WO2017194021 A1 WO 2017194021A1
Authority
WO
WIPO (PCT)
Prior art keywords
base station
source base
connection
target base
target
Prior art date
Application number
PCT/CN2017/084251
Other languages
English (en)
French (fr)
Inventor
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 WO2017194021A1 publication Critical patent/WO2017194021A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0016—Hand-off preparation specially adapted for end-to-end data sessions
    • 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
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/00837—Determination of triggering parameters for hand-off
    • 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
    • H04W76/00—Connection management
    • H04W76/30—Connection release
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/30—Connection release
    • H04W76/38—Connection release triggered by timers

Definitions

  • the present disclosure relates to the field of wireless communications, and relates to a handover method and apparatus.
  • LTE Long Term Evolution
  • UE User Equipment
  • the method used is to disconnect the source base station first. Then, the handover method of establishing a connection at the target base station (that is, establishment after the interruption, brake-before-make) is established.
  • the use of the above technical solution will result in interruption of the transmission and reception of business data.
  • the 3rd Generation Partnership Project (3GPP) discussion group provides a new scheme for simultaneously maintaining the UE's connection between the source base station and the target base station (ie, first establishing a post-interrupt, make-before-brake).
  • the technical solution of first establishing and then interrupting reduces the UE side handover interruption delay.
  • the failure in the handover process includes the following two situations: one is a radio link failure: including the following three seed types: 1) physical layer out of synchronization; 2) media access control MAC layer random access Failure; 3) The radio link controls the RLC layer to reach the maximum number of retransmission indications.
  • Another case where the handover fails is that the handover has not been successfully completed within the specified time.
  • the source base station is wasted wireless resources, and there is no effective solution at present.
  • An alternative embodiment provides a handover method and apparatus to solve at least the problem that the radio resource of the source base station is wasted due to the connection of the autonomous release source base station after the UE randomly accesses the target base station in the related art.
  • a handover method including: at a user During the process of the device UE being switched from the source base station to the target base station, the source base station sends an indication to the UE to maintain the connection with the source base station; after the source base station receives the notification information sent by the target base station, the source base station releases and a connection of the UE, wherein the notification information is used to notify the source base station to release a connection with the UE.
  • the source base station sends a handover command to the UE, where the handover command carries the indication of maintaining the connection with the source base station, where the handover command is used to indicate that the UE is used by the source base station Switch to the target base station.
  • the source base station receives the notification information that is sent by the target base station; before the source base station releases the connection with the UE, The source base station notifies the UE to release the connection with the source base station.
  • the source base station before the source base station sends an indication to the UE to maintain the connection with the source base station, the source base station sends the indication of maintaining the connection with the source base station to the target base station; and the source base station receives the response information of the target base station, The reply information is used to indicate that the target base station receives the indication that the connection with the source base station is maintained.
  • the source base station maintains a connection with the UE by using a data radio bearer DRB.
  • a handover method including: in a process in which a user equipment UE is handed over from a source base station to a target base station, the target base station receives an indication sent by the source base station to remain connected to the source base station; Before releasing the connection with the source base station, the target base station communicates with the UE by signaling the radio bearer SRB; after the UE releases the connection with the source base station, the target base station carries the DRB and the radio through the SRB and the data radio The UE communicates.
  • the method further includes: the target base station sums the indication of the connection with the source base station in the handover command sent to the source base station, and the target The base station sends a random access response to the UE; the target base station receives the control plane signaling sent by the UE, where the control plane signaling includes: a radio resource control RRC connection reconfiguration complete message; the target base station notification source The base station releases the connection with the UE, and the target base station notifies the UE to release the source base Station connection.
  • a handover method including: when a user equipment UE is handed over from a source base station to a target base station, the UE receives an indication that the source base station sends a connection with the source base station; and receives the indication at the UE After the notification sent by the source base station to instruct the UE to release the connection with the source base station, the UE releases the connection with the source base station.
  • the UE receives the handover command sent by the source base station, where the handover command carries the indication that the source base station is connected, and the handover command is used to indicate that the UE is used by the source base station. Switch to the target base station.
  • the UE remains connected to the source base station by using a data radio bearer DRB before the UE releases the connection with the source base station.
  • the UE receives the handover command sent by the source base station, the UE receives a random access response of the target base station, and the UE reconfigures the signaling radio bearer according to the target base station configuration information in the handover command. SRB.
  • the UE after the UE reconfigures the SRB, the UE establishes an independent media access control MAC entity for the SRB, or the SRB and the DRB of the UE share the same MAC entity.
  • the uplink grant information received by the UE from the target base station is used for data transmission of the SRB, and the UE is from the source.
  • the uplink grant information received by the base station is used for the data transmission of the DRB;
  • the buffer status report BSR that is triggered by the UE and reported to the target base station includes only the cached data of the SRB, and the UE triggers and reports to the source base station.
  • the BSR only includes the cached data of the DRB.
  • the UE sends control plane signaling to the target base station, where the control plane signaling includes: a radio resource control RRC connection reconfiguration complete message; the UE receives a notification message of the target base station or the source base station, The notification message is used to notify the UE to release the connection with the source base station.
  • the control plane signaling includes: a radio resource control RRC connection reconfiguration complete message; the UE receives a notification message of the target base station or the source base station, The notification message is used to notify the UE to release the connection with the source base station.
  • the method further includes: before the UE releases the connection with the source base station, the UE performs data transmission by using the SRB and the target base station; after the UE releases the connection with the source base station, the UE passes the The SRB and the DRB perform data transmission with the target base station.
  • the method further includes: the UE establishing a connection with the target base station by using the target base station configuration information, where the connection with the target base station fails, The UE maintains a connection with the source base station, and the UE releases the configuration information of the target base station, and the UE reports the indication information that the connection with the target base station fails to be established to the source base station.
  • the indication information for establishing a connection failure includes one of the following types: handover failure; random access failure; physical layer RLM detection failure; radio link control RLC retransmission failure.
  • a switching apparatus including: a sending module, configured to send timer configuration information to a UE during a handover of a user equipment UE from a source base station to a target base station Or maintaining an indication of the connection with the source base station; the first release module is configured to: after the source base station receives the notification information sent by the target base station, the source base station releases a connection with the UE, where the notification The information is used to notify the source base station to release the connection with the UE.
  • a switching apparatus including: a first receiving module, configured to receive, during a handover of a user equipment UE from a source base station to a target base station, the first receiving module receives a sending by a source base station Maintaining an indication of the connection with the source base station; the communication module is configured to: before the UE releases the connection with the source base station, the target base station communicates with the UE by using a signaling radio bearer; the communication module is further configured to After the UE releases the connection with the source base station, the target base station communicates with the UE through the SRB and the data radio bearer DRB.
  • the application is performed by the second receiving module, where the second receiving module receives the hold and the source sent by the source base station during the handover of the user equipment UE from the source base station to the target base station.
  • An indication of the connection of the base station where the second release module is configured to receive, by the UE, the source base station, to indicate that the UE is released After the notification of the connection of the source base station, the UE releases the connection with the source base station.
  • a storage medium is also provided.
  • the storage medium is arranged to store program code for performing the following steps:
  • the source base station sends an indication to the UE to maintain the connection with the source base station;
  • the source base station After the source base station receives the notification information sent by the target base station, the source base station releases the connection with the UE, where the notification information is used to notify the source base station to release the connection with the UE.
  • the storage medium is further arranged to store program code for performing the following steps:
  • the target base station receives an indication sent by the source base station to maintain connection with the source base station;
  • the target base station Before the UE releases the connection with the source base station, the target base station communicates with the UE by signaling the radio bearer SRB; after the UE releases the connection with the source base station, the target base station passes the SRB and the data wireless Carrying the DRB and the UE for communication
  • the storage medium is further arranged to store program code for performing the following steps:
  • the UE receives an indication sent by the source base station to maintain the connection with the source base station;
  • the UE After the UE receives the notification sent by the source base station to instruct the UE to release the connection with the source base station, the UE releases the connection with the source base station.
  • a storage medium comprising a stored program, wherein the program is executed to perform one of the switching methods described above.
  • the source base station in the process of the UE applying for the handover of the base station, sends an indication to the UE and the target base station to maintain the connection with the source base station, and after the source base station receives the notification information sent by the target base station, the source base station releases the connection with the UE.
  • the notification information is used to notify the source base station to release the connection with the UE.
  • the source base station According to the notification information sent by the target base station, the source base station The connection between the UE and the UE that has been switched to the target base station is released in time, and the problem that the radio resource of the source base station is wasted due to the connection of the autonomous release source base station after the UE randomly accesses the target base station in the related art is solved, and the radio resource of the source base station is saved in time. .
  • FIG. 1 is a flowchart of a method for a UE to handover a base station according to the related art
  • FIG. 2 is a structural diagram of a layer 2 entity of a UE according to the related art
  • FIG. 3 is a flowchart 1 of a handover method according to an alternative embodiment of the present disclosure.
  • FIG. 4 is a second flowchart of a handover method according to an alternative embodiment of the present disclosure.
  • FIG. 5 is a flowchart 3 of a handover method according to an alternative embodiment of the present disclosure.
  • FIG. 6 is a flowchart of a timer-based switching method according to an alternative embodiment of the present disclosure.
  • FIG. 7 is a reconfiguration SRB diagram of a timer based handover method, in accordance with an alternative embodiment of the present disclosure.
  • FIG. 8 is a flowchart of a UE start timer of a timer-based handover method according to an alternative embodiment of the present disclosure
  • FIG. 9 is a reconfiguration DRB diagram of a timer based switching method in accordance with an alternative embodiment of the present disclosure.
  • FIG. 10 is a flowchart of a handover indication based handover method according to an alternative embodiment of the present disclosure.
  • FIG. 11 is a flowchart of a process of handover failure according to an alternative embodiment of the present disclosure, as shown in FIG. 11;
  • FIG. 12 is a layer 2 processing diagram of a handover failure according to an alternative embodiment of the present disclosure.
  • FIG. 13 is a diagram of a structure of a switching device applied to a source base station according to an alternative embodiment block diagram
  • FIG. 14 is a structural block diagram of a switching apparatus applied to a target base station according to an alternative embodiment
  • FIG. 15 is a structural block diagram of a handover apparatus applied to a UE according to an alternative embodiment
  • 16 is a structural block diagram of a source base station according to an alternative embodiment
  • 17 is a structural block diagram of a target base station according to an alternative embodiment
  • FIG. 18 is a structural block diagram of a user equipment according to an alternative embodiment
  • FIG. 19 is a structural diagram of a user equipment base station handover system according to an alternative embodiment.
  • the random access procedure refers to a process from when a user sends a random access preamble to try to access the network to establish a basic signaling connection with the network.
  • FIG. 1 is a flowchart of a method for the UE to switch the base station according to the related art. Proceed as follows:
  • step S101 the UE reports a Measurement Report to the network layer.
  • step S102 the source eNB sends a handover request (Handover Request) to the target base station (Target eNB), (Evolved Node B, eNB for short).
  • step S103 the target base station agrees to handover and replies to the Handover Request Acknowledge.
  • step S104 the source base station sends a handover command to the UE, that is, an RRC connection reconfiguration (RRC Connection Reconfiguration) message, and a radio resource control (Radio Resource Control, RRC for short).
  • RRC connection reconfiguration RRC Connection Reconfiguration
  • RRC Radio Resource Control
  • Step S105 the source base station initiates a data forwarding process, sends a number status transmission information (5a.SN Status Transfer) to the target base station, and forwards the data (5b.Data forwarding) to the target base station.
  • a number status transmission information (5a.SN Status Transfer)
  • 5b.Data forwarding 5b.Data forwarding
  • step S106 the UE initiates a random access procedure in the target while maintaining the data transmission with the source base station, and sends a random access request to the target base station through a physical random access channel (Physical Random Access Channel, PRACH for short).
  • a physical random access channel Physical Random Access Channel, PRACH for short.
  • Step S107 The target base station replies to the UE with a random access response message (Random Access Response, RAR for short). After receiving the response, the UE disconnects from the source base station, and reconfigures its layer 2 entity by applying the configuration of the target base station received in S104.
  • RAR Random Access Response
  • Step S108 the UE sends an RRC Connection Reconfiguration Complete (RRC Connection Reconfiguration Complete) to the target base station.
  • Step S109 The target base station instructs the source base station to release the air interface connection with the UE, that is, the UE context release (UE Context Release) message.
  • the UE context release UE Context Release
  • the entity includes: a Packet Data Convergence Protocol (PDCP); a wireless link. Control (Radio Link Control, RLC for short); Medium Access Control (MAC).
  • PDCP Packet Data Convergence Protocol
  • RLC Radio Link Control
  • MAC Medium Access Control
  • the UE when the user equipment UE switches the base station, the UE generally switches to the base station because the radio link fails or the UE does not successfully complete the handover of the base station within the specified time. Autonomous release source base station after base station The connection is made, and the source base station remains connected to the UE because the UE does not successfully complete the handover, thereby causing waste of the source base station radio resources.
  • the embodiments of the present disclosure may be implemented in a Long Term Evolution (LTE) system (including but not limited to an LTE system), and the network architecture of the system network may include network side devices (such as base stations) and terminals.
  • LTE Long Term Evolution
  • the network architecture of the system network may include network side devices (such as base stations) and terminals.
  • a method for a handover base station that can be operated on the foregoing network architecture is provided. It should be noted that the operating environment of the foregoing handover base station method provided in the embodiment of the present disclosure is not limited to the foregoing network architecture.
  • FIG. 3 is a flowchart 1 of a switching method according to an alternative embodiment. As shown in FIG. 3, the process includes the following steps:
  • Step S302 in the process of the user equipment UE being handed over from the source base station to the target base station, the source base station sends an indication to the UE to maintain the connection with the source base station;
  • Step S304 after the source base station receives the notification information sent by the target base station, the source base station releases the connection with the UE, where the notification information is used to notify the source base station to release the connection with the UE.
  • the source base station sends a handover command to the UE, where the handover command carries an indication of maintaining a connection with the source base station, where the handover command is used to indicate that the UE is handed over to the target base station by the source base station.
  • the source base station requests the target base station to request the uplink transmission resource configuration information that the UE is connected to the target base station, and after receiving the configuration information, the source base station carries the configuration information in the handover command and sends the configuration information to the UE.
  • the indication of maintaining the connection with the source base station of the embodiment may also be carried in the handover command and sent to the UE.
  • the source base station may further include sending timer configuration information to the UE, where the timer configuration information is used to configure the UE to connect to the source base station.
  • a timer of the duration in this embodiment, the source base station sends a handover command to the UE, where the handover command may further carry timer configuration information, and after the timer expires, the source base station releases the UE with the UE. of connection.
  • the source base station receives the notification information that is sent by the target base station, where the notification information is used to notify the source base station to release the connection with the UE;
  • the UE is notified to release the connection with the source base station.
  • the source base station first forwards the notification information to the UE, and then releases the connection with the UE.
  • the target base station autonomously notifies the source base station to release the connection with the UE. For the UE side, the target base station Or the source base station also notifies the UE side to release the connection with the source base station.
  • the source base station releases the connection with the UE in two ways.
  • the method is to receive the notification information sent by the target base station to the source base station, where the notification information is used to indicate that the source base station releases the connection with the UE.
  • the other way is to set the timer configuration information, and after the timer expires, the source base station releases the connection with the UE.
  • the two modes are adopted to ensure complete release between the source base station and the UE during the buffering time to save the source base station radio resources.
  • the timer configuration information may set the retention time of the connection between the source base station and the UE, and the actual timer configuration information may be set according to actual experience.
  • the source base station before the source base station sends an indication to the UE to maintain the connection with the source base station, the source base station sends an indication of maintaining the connection with the source base station to the target base station; the source base station receives the target base station reply information, where the reply The information is used to indicate that the target base station receives the indication that the connection with the source base station is maintained.
  • the target base station performs corresponding operations according to the foregoing configuration information.
  • the source base station in the process of the user equipment UE being switched from the source base station to the target base station, the source base station sends the timer configuration information to the UE or maintains the indication of the connection with the source base station, or the source base station may simultaneously send the timer configuration information to the UE. And an indication to maintain connection with the source base station.
  • the timer configuration information and the indication of maintaining the connection with the source base station may be carried in the handover command.
  • the data radio bearer is sent before the UE releases the connection with the source base station.
  • the DRB remains connected to the UE.
  • FIG. 4 is a flowchart 2 of a handover method according to an alternative embodiment. As shown in FIG. 4, the process includes the following steps:
  • Step S402 in the process of the user equipment UE being handed over from the source base station to the target base station, the target base station receives an indication sent by the source base station to maintain the connection with the source base station;
  • Step S404 Before the UE releases the connection with the source base station, the target base station communicates with the UE by using the SRB; after the UE releases the connection with the source base station, the target base station communicates with the UE by using the SRB and the DRB.
  • the embodiment corresponds to the foregoing embodiment before the connection between the source base station and the source base station is instructed to release the connection between the UE and the source base station. It should be noted that, if the target base station receives the timer configuration information sent by the source base station, the timing is The connection to the UE before and after the timeout is different. .
  • the method further includes: the target base station sends a random access response to the UE; and the target base station receives the control plane signaling sent by the UE, where The control plane signaling includes: an RRC connection reconfiguration complete message; the target base station notifies the source base station to release the connection with the UE, and the target base station notifies the UE to release the connection with the source base station.
  • the target base station when the target base station does not receive the timer configuration information sent by the source base station, the target base station automatically reports the target base station after receiving the RRC connection reconfiguration complete message of the UE. The source base station and the UE release each other's connections to each other.
  • FIG. 5 is a flowchart 3 of a handover method according to an alternative embodiment. As shown in FIG. 5, the flow includes the following steps:
  • Step S502 in a process in which the user equipment UE is switched from the source base station to the target base station, the UE receives an indication that the source base station sends a connection with the source base station;
  • Step S504 After receiving the notification sent by the source base station to instruct the UE to release the connection with the source base station, the UE releases the connection with the source base station.
  • the UE receives the handover command sent by the source base station, and receives an indication sent by the source base station to maintain a connection with the source base station, where the handover command carries an indication of maintaining a connection with the source base station, where the handover command is used to indicate the UE
  • the source base station switches to the target base station.
  • the UE must receive the handover command sent by the source base station to indicate the configuration information of the target base station.
  • the UE may receive the timer configuration information sent by the source base station or the indication of maintaining the connection with the source base station, or may be the timer that the UE receives the source base station simultaneously. Configuration information and an indication to maintain connection with the source base station. The timer configuration information and the indication of maintaining the connection with the source base station may be carried in the handover command.
  • the UE before the UE releases the connection with the source base station, the UE maintains a connection with the source base station through the data radio bearer DRB.
  • the UE receives a random access response of the target base station, and the UE reconfigures the signaling radio bearer SRB according to the target base station configuration information in the handover command.
  • the radio bearer includes an SRB and a DRB, and in the case where the DRB is used to connect with the source base station, the UE reconfigures the SRB.
  • the UE after the UE reconfigures the SRB, the UE establishes an independent MAC entity for the SRB, or the SRB and the DRB of the UE share the same MAC entity.
  • the uplink grant information received by the UE from the target base station is used for data transmission of the SRB
  • the uplink grant information received by the UE from the source base station is used.
  • the data transmission of the DRB; the buffer status report BSR that the UE triggers and reports to the target base station includes only the buffered data of the SRB, and the BSR that the UE triggers and reports to the source base station includes only the cached data of the DRB.
  • the UE sends control plane signaling to the target base station, where the control plane signaling includes: an RRC connection reconfiguration complete message; the UE receives a notification message of the target base station or the source base station, where the notification message is used by the UE The UE is notified to release the connection with the source base station.
  • the control plane signaling includes: an RRC connection reconfiguration complete message; the UE receives a notification message of the target base station or the source base station, where the notification message is used by the UE The UE is notified to release the connection with the source base station.
  • the UE when the UE does not receive the timer configuration information sent by the source base station, the UE directly communicates with the target base station, and the target base is used. The station notifies the UE and the source base station to release the connections between them on both sides.
  • the UE after the UE receives the random access response of the target base station, before the UE releases the connection with the source base station, the UE performs data transmission by using the SRB and the target base station; and the UE releases the source base station. After the connection, the UE performs data transmission with the target base station through the SRB and the DRB.
  • the UE reconfigures the radio bearer RB according to the target base station configuration information in the handover command.
  • the UE reconfigures the RB, if the SRB and the DRB of the UE adopt the same MAC entity, the UE reconfigures the layer 2 entity of the DRB and the SRB by using the target base station configuration information; If the SRB and the DRB use different MAC entities, the UE re-establishes the layer 2 entity corresponding to the DRB by using the target base station configuration information; the UE releases the MAC entity corresponding to the SRB, and reconfigures the SRB to be the same as the DRB.
  • the MAC entity, or the UE releases the layer 2 entity corresponding to the SRB and reconstructs the SRB as the same MAC entity as the DRB.
  • the SRB and the DRB use the same MAC entity, there is a reconfiguration method.
  • the triggering and reporting of the BSR of the UE includes the data of the DRB and the SRB, and the uplink grant of the target base station received by the UE is available to the DRB and the SRB at the same time.
  • the data is sent.
  • the UE after the UE receives the handover command sent by the source base station, the UE establishes a connection with the target base station by using the target base station configuration information, and if the connection with the target base station fails, the UE maintains a connection with the source base station, The UE releases the target base station configuration information. In the process of the UE switching the base station, it is inevitable that the handover base station fails. If the handover to the target base station fails, the UE remains connected with the source base station, and then the network side can re-trigger the UE handover base station procedure.
  • the indication information for establishing the connection failure in the foregoing embodiment includes one of the following types: handover failure; random access failure; physical layer RLM detection failure; and RLC retransmission failure.
  • FIG. 6 is a timer-based switching method according to an alternative embodiment of the present disclosure.
  • the flow chart, as shown in Figure 6, is as follows:
  • the source base station sends the configuration information (the timer configuration information in the foregoing embodiment) of the timer that keeps the UE connected to the source base station to the target base station.
  • the configuration information may include the expected duration of the timer.
  • the configuration information indicates that the UE is to be connected at the source base station. (Instruction of "Timer” and “Remain Connection Indication” in the "Handover Request” message shown in S601 in Fig. 6)
  • Step S602 the target base station sets a "timer to keep the UE connected to the source base station" configuration, and the setting indicates that the UE wants to maintain the connection at the source base station, and sends the connection to the source base station.
  • step S603 the source base station sends the "keeping timer of the UE to the source base station" to the UE when the handover command is issued, and sends the indication to the UE to keep the connection of the source base station, and the source base station records the UE's "hold UE”.
  • the source base station performs data transmission and reception through the DRB and the UE, and after the timer expires, the source base station releases the source base station connection of the UE.
  • the UE After receiving the handover command, the UE starts the “keeping timer for the UE to connect to the source base station”, and maintains the connection with the source base station before the timer of “keeping the UE connected to the source base station” expires, and performs data through the DRB and the source base station. Communication.
  • FIG. 7 is a reconfiguration SRB diagram of a timer-based handover method according to an alternative embodiment of the present disclosure. As shown in FIG. 7, the UE reconfigures the SRB according to configuration information of the target cell. There are two ways to reconfigure the SRB:
  • Mode 1 (the method method1 in FIG. 7): the SRB and the DRB of the UE share the same MAC entity, and the uplink grant information received by the UE from the target base station is used for data transmission of the SRB, and the uplink grant information received from the source base station is used for the DRB. Data is sent.
  • the BSR that is triggered by the UE and reported to the target base station only includes the cached data of the SRB.
  • the BSR that the UE triggers and reports to the source base station only includes the cached data of the DRB.
  • the UE may establish an independent MAC entity for the SRB, and the MAC entity corresponds to the connection of the target base station.
  • FIG. 8 is a flowchart of a UE start timer according to a timer-based handover method according to an alternative embodiment of the present disclosure.
  • the UE receives the configuration of the timer at time t1, and includes the timer. Total time (Toverall).
  • the UE can only start the timer at time t2 due to the processing delay (Tue) of the information. Therefore, when the UE starts the timer, the timeout period of the timer should exclude the processing delay of the UE. For (Toverall-Tue).
  • Step S604 the source base station initiates a data forwarding process to the target base station.
  • Step S605 the UE initiates a random access procedure to the target base station.
  • Figure 6S605 PRACH
  • Step S606 the target base station replies to the random access response. (See “RAR” in S606 in Figure 6)
  • Step S607 the UE reports the remaining duration of the "keeping timer of the UE connected to the source base station" to the target base station, (such as “Remaining Time” of "RRC Connection Reconfiguration Complete” in S607 in FIG. 6 and “Tremain” in FIG. ).
  • the remaining duration may additionally include a processing delay for reconfiguring the layer 2 entity after the UE timer expires (such as Tlayer 2 in FIG. 8).
  • the target base station records the remaining duration of the UE's "keeping the UE to connect to the source base station” timeout time, and the target base station communicates with the UE through the SRB before the UE's "keeping the UE to connect to the source base station” timeout.
  • the target base station communicates with the UE through the SRB and the DRB after the UE's "keeping timer for the UE to connect to the source base station" times out.
  • the remaining time length of the target base station for the UE's "keeping the UE to connect to the source base station" timeout time may be processed according to the manner of FIG. 8: the target base station receives the configuration of the timer at time t3, including the remaining duration of the timer ( Tremain).
  • the target base station at time t4 due to the processing delay (TeNB) for the information, the target base station can only be at t4
  • the remaining time length can be obtained at the time, starting from time t4, so the eNB considers that the end time at the time t5 is (Tremain-TeNB).
  • Step S608 the UE notifies the target base station that its reconfiguration is completed after reconfiguring its layer 2 entity. ("Reset Confirmation" of S608 in Figure 6)
  • FIG. 9 is a reconfiguration DRB diagram of a timer-based handover method according to an alternative embodiment of the present disclosure.
  • the manner in which the UE reconfigures its layer 2 entity may be performed as shown in FIG. 9:
  • the UE reconfigures the layer 2 entity of the DRB and the SRB by using the configuration of the target base station.
  • the UE If the current configuration mode of the SRB of the UE is mode 2 in S603, the UE re-establishes the layer 2 entity corresponding to the DRB by using the configuration of the target base station, and the UE releases the MAC entity corresponding to the SRB to reconfigure the SRB to the same MAC entity as the DRB, or After the UE releases the layer 2 entity corresponding to the SRB, the UE re-establishes the SRB as the same MAC entity as the DRB.
  • FIG. 10 is a flowchart of a method for switching based on a release indication according to an alternative embodiment of the present disclosure. As shown in FIG. 10, the steps are as follows:
  • Step S1001 The source base station sends a handover request to the target base station. And indicating that the UE is to be connected at the source base station. (Indication of "Remain Connection Indication” in the "Handover Request” message shown in S1001 in Fig. 10)
  • Step S1002 The target base station sends a handover request response to the source base station, and instructs the UE to maintain the connection at the source base station.
  • step S1003 the source base station sends the indication to the source base station to the UE when the handover command is issued, and the source base station performs data transmission and reception through the DRB and the UE.
  • the UE After receiving the handover command, the UE maintains the connection with the source base station and performs data communication with the source base station through the DRB.
  • the UE reconfigures the SRB according to the configuration information of the target cell, and the reconfiguration manner of the SRB is the same as that described in S603.
  • Step S1004 The data base station initiates a data forwarding process to the target base station.
  • Step S1005 The UE initiates a random access procedure to the target base station. (As shown in Figure 10, "PRACH" of S1005)
  • step S1006 the target base station replies to the random access response. (As shown in Figure 10, "RAR" of S1006)
  • step S1007 the UE reports the RRC connection reconfiguration complete message to the target base station (as shown in S1007, "RRC Connection Reconfiguration Complete").
  • the target base station communicates with the UE through the SRB.
  • Step S1008 The target base station notifies the source base station to release the source base station connection of the UE. (As shown in Figure 10, "UE Context Release” message of S1008)
  • Step S1009 The source base station releases the source base station connection of the UE, and notifies the target base station to release the result. (As shown in Figure 10, "Release Confirmation" message of S1009)
  • step S1010 the target base station notifies the UE to release the connection of the source base station. (Indicated by "Release Indication” in the "RRC Connection Reconfiguration” message of S1010 in Figure 10)
  • Step S1011 The UE releases the connection of the source base station, reconfigures its layer 2 entity, and sends an acknowledgement message to notify the target base station.
  • RRC Connection Reconfiguration Complete message in Figure 10
  • FIG. 11 is a process flow diagram of a handover failure, as shown in FIG. 11, in accordance with an alternative embodiment of the present disclosure.
  • Step S1101 The source base station sends a handover command to the UE, and indicates that the connection is maintained at the source base station.
  • the manner in which the UE reconfigures the SRB is the same as the method described in S603.
  • step S1102 if the UE fails to perform the wireless connection during the handover, the UE maintains the data communication with the source base station, and does not trigger the connection re-establishment process, the UE reports a failure indication to the network side, and the failure indication information may include a failure type: Failed Incoming failure; physical layer RLM detection failed; RLC retransmission failed.
  • the UE releases the configuration information of the target base station. (As shown in Figure 11 in the "Failure Indication" message of S1102)
  • FIG. 12 is a layer 2 processing diagram of handover failure according to an alternative embodiment of the present disclosure. As shown in FIG. 12, layer 2 of the UE may be processed according to FIG. 12:
  • Mode 2 If the SRB and the DRB of the UE are different MAC entities, the UE reconfigures the SRB by using the configuration of the source base station, and the UE releases the SRB corresponding to the SRB to reconfigure the SRB into the same MAC entity as the DRB, or the UE. After releasing the layer 2 entity corresponding to the SRB, the SRB is re-established to be the same MAC entity as the DRB.
  • the source base station may select another cell to switch the UE.
  • the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, by hardware, but in many cases, the former is A better implementation.
  • the technical solution of the present disclosure which is essential or contributes to the related art, may be embodied in the form of a software product stored in a storage medium (such as ROM/RAM, disk, CD-ROM).
  • the instructions include a plurality of instructions for causing a terminal device (which may be a cell phone, a computer, a server, or a network device, etc.) to perform the method of various embodiments of the present disclosure.
  • a switching device is also provided, which is used to implement the foregoing embodiments and optional embodiments, and has not been described again.
  • the term "module” may implement a combination of software and/or hardware of a predetermined function.
  • the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.
  • FIG. 13 is a structural block diagram of a switching apparatus according to an alternative embodiment. As shown in FIG. 13, the apparatus includes:
  • the sending module 1302 is configured to switch, at the user equipment UE, the source base station to the target base station In the process, the sending module 1302 sends an indication to the UE to maintain the connection with the source base station;
  • the first release module 1304 is connected to the sending module 1302, and is configured to: after the source base station receives the notification information sent by the target base station, the source base station releases the connection with the UE, where the notification information is used to notify the source base station to release the UE. Connection.
  • FIG. 14 is a structural block diagram of a switching apparatus according to an alternative embodiment. As shown in FIG. 14, the apparatus includes:
  • the first receiving module 1402 is configured to receive, during the handover of the user equipment UE by the source base station to the target base station, the first receiving module 1402 receiving an indication that the source base station sends a connection with the source base station;
  • the communication module 1404 is connected to the first receiving module 1402, and is configured to communicate with the UE by signaling the radio bearer SRB before the UE releases the connection with the source base station; the communication module 1404 is further configured to be in the After the UE releases the connection with the source base station, the target base station communicates with the UE through the SRB and the data radio bearer DRB.
  • FIG. 15 is a structural block diagram of a switching apparatus applied to a UE according to an alternative embodiment. As shown in FIG. 15, the apparatus includes:
  • the second receiving module 1502 is configured to receive, during the handover of the user equipment UE by the source base station to the target base station, the second receiving module 1502 receiving an indication that the source base station sends a connection with the source base station;
  • the second release module 1504 is connected to the second receiving module 1502, and is configured to: after the UE receives the notification sent by the source base station to instruct the UE to release the connection with the source base station, the UE releases the connection with the source base station.
  • each of the above modules may be implemented by software or hardware.
  • the foregoing may be implemented by, but not limited to, the foregoing modules are all located in the same processor; or, the above modules are in any combination.
  • the forms are located in different processors; or the functions of the processor are used to implement the above modules.
  • Embodiments of the present disclosure also provide a storage medium.
  • the foregoing storage medium may be configured to store program code for performing the following steps:
  • the source base station sends an indication to the UE to maintain the connection with the source base station.
  • the source base station After the source base station receives the notification information sent by the target base station, the source base station releases the connection with the UE, where the notification information is used to notify the source base station to release the connection with the UE.
  • the above storage medium may be arranged to store program code for performing the following steps:
  • the target base station in the process of the user equipment UE being handed over from the source base station to the target base station, the target base station receiving an indication sent by the source base station to maintain the connection with the source base station;
  • the target base station Before the UE releases the connection with the source base station, the target base station performs communication by signaling the radio bearer SRB and the UE; after the UE releases the connection with the source base station, the target base station communicates with the UE through the SRB and the data radio bearer DRB.
  • the above storage medium may be arranged to store program code for performing the following steps:
  • the UE receives an indication sent by the source base station to maintain the connection with the source base station during the handover of the user equipment UE from the source base station to the target base station.
  • the UE After the UE receives the notification that is sent by the source base station to instruct the UE to release the connection with the source base station, the UE releases the connection with the source base station.
  • An embodiment of the present disclosure further provides a source base station.
  • the source base station includes: a memory 1602 and a processor 1604, where the processor 1602 is configured to execute an execution instruction stored in the memory 1604.
  • the above memory 1604 is further configured to store the following execution instructions:
  • the source base station sends an indication to the UE to maintain the connection with the source base station.
  • the source base station After the source base station receives the notification information sent by the target base station, the source base station releases the connection with the UE, where the notification information is used to notify the source base station to release the connection with the UE.
  • the target base station includes: a memory 1702 and a processor 1704, where the processor 1704 is configured to execute an execution instruction stored in the memory 1702.
  • the above memory 1702 is further configured to store the following execution instructions:
  • the target base station receives an indication that the source base station sends a connection with the source base station.
  • the target base station Before the UE releases the connection with the source base station, the target base station communicates with the UE by using the signaling radio bearer SRB; after the UE releases the connection with the source base station, the target base station communicates with the UE by using the SRB and the data radio bearer DRB.
  • An embodiment of the present disclosure further provides a user equipment, as shown in FIG. 18, the user equipment UE includes: a memory 1802 and a processor 1804, where the processor 1804 is configured to execute an execution instruction stored in the memory 1802.
  • the above memory 1802 is further configured to store the following execution instructions:
  • the UE receives an indication sent by the source base station to maintain the connection with the source base station during the handover of the user equipment UE from the source base station to the target base station.
  • the UE After the UE receives the notification that is sent by the source base station to indicate that the UE releases the connection with the source base station, the UE releases the connection with the source base station, where the notification information is used to notify the source base station to release the connection with the UE.
  • An embodiment of the present disclosure further provides a user equipment base station handover system.
  • the user equipment base station handover system includes:
  • the source base station 1902 is configured to, when the user equipment 1906 is switched from the source base station 1902 to the target base station 1904, the source base station 1902 sends an indication to the target base station 1904 to maintain the connection with the source base station 1902, and the source base station 1902 is configured to receive the target base station 1904. After the notification information is sent, the source base station 1902 releases the connection with the user equipment 1906, where The notification information is used to notify the source base station 1902 to release the connection with the user equipment 1906;
  • the target base station 1904 is configured to receive, during the handover of the user equipment 1906 by the source base station 1902 to the target base station 1904, the target base station 1904 receives an indication sent by the source base station 1902 to remain connected to the source base station 1802; and releases the source base station 1902 at the user equipment 1906.
  • the target base station 1904 Prior to the connection, the target base station 1904 communicates with the user equipment 1906 via the signaling radio bearer SRB; after the user equipment 1906 releases the connection with the source base station 1902, the target base station 1904 communicates with the user equipment 1906 via the SRB and the data radio bearer DRB.
  • the user equipment 1906 is configured to receive, during the handover of the user equipment 1906 from the source base station 1902 to the target base station 1904, the user equipment 1906 receives an indication sent by the source base station 1902 to maintain the connection with the source base station 1902; and the user equipment 1906 receives the source base station 1902. After the notification indicating that the user equipment 1906 releases the connection with the source base station 1906, the user equipment 1906 releases the connection with the source base station 1902.
  • 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 disclosure described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network 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 order herein.
  • the steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated as a single integrated circuit module. As such, the disclosure is not limited to any specific combination of hardware and software.
  • the source base station sends an indication of maintaining the connection with the source base station to the UE and the target base station in the process of the user equipment UE applying for the handover of the base station, after the source base station receives the notification information sent by the target base station, The source base station releases the connection with the UE, where the notification information is used to notify the source base station to release the connection with the UE.
  • the source base station releases the connection with the UE that has switched to the target base station in time, and solves the problem that the wireless resource of the source base station is wasted due to the connection of the autonomous release source base station after the UE randomly accesses the target base station in the related art.
  • the problem is to save the wireless resources of the source base station in time.

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Abstract

本公开提供了一种切换方法及装置，其中，该方法包括：在用户设备UE由源基站向目标基站切换过程中，该源基站向UE发送保持与源基站连接的指示；在源基站接收目标基站下发的通知信息后，该源基站释放与该UE的连接，其中，通知信息用于通知源基站释放与UE的连接。采用上述技术方案，解决了相关技术中的UE随机接入目标基站后自主释放源基站连接导致源基站无线资源浪费的问题，及时的节约了源基站的无线资源。

Description

切换方法及装置 技术领域
本公开涉及无线通信领域，涉及一种切换方法及装置。
背景技术
在相关技术中，在当前长期演进系统(Long Term Evolution，简称为LTE)系统中，用户设备(User Equipment，简称为UE)要切换目标基站时，采用的方法是先在源基站断开连接，然后再在目标基站建立连接的切换方法(即先中断后建立，brake-before-make)。采用上述技术方案会产生业务数据的收发中断。因此第三代合作伙伴项目(The 3rd Generation Partnership Project，简称为3GPP)讨论组提供了新的方案用于同时保持UE在源基站和目标基站的连接(即先建立后中断，make-before-brake)，采用先建立后中断的技术方案减少了UE侧切换中断延时。
在相关技术中，切换过程中的失败包括以下两种情况下，一种是无线链路失败：包括以下3种子类型：1)物理层失同步；2)媒体接入控制MAC层的随机接入失败；3)无线链路控制RLC层的达到最大重传次数指示。另一种切换失败的情况是在规定时间内没有成功完成切换。
针对相关技术中的UE随机接入目标基站后自主释放源基站连接导致源基站无线资源浪费的问题，目前还没有有效的解决方案。
发明内容
可选实施例提供了一种切换方法及装置，以至少解决相关技术中UE随机接入目标基站后自主释放源基站连接导致源基站无线资源浪费的问题。
根据本公开的一个实施例，提供了一种切换方法，包括：在用户 设备UE由源基站向目标基站切换过程中，所述源基站向UE发送保持与源基站连接的指示；在所述源基站接收所述目标基站下发的通知信息之后，所述源基站释放与所述UE的连接，其中，所述通知信息用于通知所述源基站释放与所述UE的连接。
可选地，所述源基站向所述UE发送切换命令，其中，所述切换命令中携带有所述保持与源基站连接的指示，所述切换命令用于指示所述UE由所述源基站切换至目标基站。
可选地，在所述源基站向所述UE发送切换命令之后，所述源基站接收所述目标基站下发的所述通知信息；在所述源基站释放与所述UE的连接之前，所述源基站通知所述UE释放与所述源基站的连接。
可选地，在源基站向UE发送保持与源基站连接的指示之前，所述源基站将所述保持与源基站连接的指示发送到目标基站；所述源基站接收所述目标基站回复信息，其中，所述回复信息用于指示所述目标基站收到所述保持与源基站连接的指示。
可选地，在所述UE释放和源基站的连接之前，所述源基站通过数据无线承载DRB与所述UE保持连接。
根据本公开的一个实施例，提供了一种切换方法，包括：在用户设备UE由源基站向目标基站切换过程中，目标基站接收源基站发送的保持与源基站连接的指示；在所述UE释放和源基站的连接之前，所述目标基站通过信令无线承载SRB和所述UE进行通信；在所述UE释放和源基站的连接之后，所述目标基站通过SRB和数据无线承载DRB和所述UE进行通信。
可选地，在目标基站接收源基站发送的保持与源基站连接的指示之前，所述方法还包括：目标基站在向源基站发送的切换命令汇总携带所述保持与源基站连接的指示，目标基站向UE发送随机接入响应；所述目标基站接收所述UE发送的控制面信令，其中，所述控制面信令包括：无线资源控制RRC连接重配置完成消息；所述目标基站通知源基站释放与UE的连接，所述目标基站通知所述UE释放与源基 站的连接。
根据本公开的一个实施例，提供了一种切换方法，包括：在用户设备UE由源基站向目标基站切换过程中，UE接收源基站发送的保持与源基站连接的指示；在所述UE接收到所述源基站发送的用于指示所述UE释放与所述源基站的连接的通知之后，所述UE释放与所述源基站的连接。
可选地，所述UE接收所述源基站发送的切换命令，其中，所述切换命令携带有所述保持与源基站连接的指示，所述切换命令用于指示所述UE由所述源基站切换至目标基站。
可选地，在所述UE释放和源基站的连接之前，所述UE通过数据无线承载DRB和所述源基站保持连接。
可选地，在所述UE接收源基站发送的切换命令之后，所述UE接收到目标基站的随机接入响应，所述UE依据所述切换命令中的目标基站配置信息重配置信令无线承载SRB。
可选地，在所述UE重配置所述SRB之后，所述UE为所述SRB建立独立的媒体接入控制MAC实体，或者，所述UE的SRB和DRB共享同一个MAC实体。
可选地，在所述SRB和所述DRB共享同一个MAC实体的情况下，所述UE从所述目标基站接收的上行授权信息用于所述SRB的数据发送，所述UE从所述源基站接收的上行授权信息用于所述DRB的数据发送；所述UE触发和上报给所述目标基站的缓存状态报告BSR仅包括SRB的缓存数据，所述UE触发和上报给所述源基站的BSR仅包括DRB的缓存数据。
可选地，所述UE将控制面信令发送给目标基站，其中，所述控制面信令包括：无线资源控制RRC连接重配置完成消息；所述UE接收目标基站或者源基站的通知消息，其中，所述通知消息用于通知所述UE释放与源基站的连接。
可选地，在所述UE接收到所述目标基站的随机接入响应之后， 所述方法还包括：在所述UE释放和源基站的连接之前，所述UE通过SRB和所述目标基站进行数据传输；在所述UE释放和源基站的连接之后，所述UE通过所述SRB和DRB与所述目标基站进行数据传输。
可选地，在所述UE接收源基站发送的切换命令之后，所述方法还包括：所述UE使用目标基站配置信息建立与目标基站的连接，在与目标基站建立连接失败的情况下，所述UE保持与源基站的连接，所述UE释放所述目标基站配置信息，所述UE向源基站上报与目标基站建立连接失败的指示信息。
可选地，所述建立连接失败的指示信息包括以下之一类型：切换失败；随机接入失败；物理层RLM检测失败；无线链路控制RLC重传失败。
根据本公开的另一个实施例，提供了一种切换装置，包括：发送模块，设置为在用户设备UE由源基站向目标基站切换过程中，所述发送模块向UE发送定时器配置信息和/或保持与源基站连接的指示；第一释放模块，设置为在所述源基站接收所述目标基站下发的通知信息之后，所述源基站释放与所述UE的连接，其中，所述通知信息用于通知所述源基站释放与所述UE的连接。
根据本公开的另一个实施例，提供了一种切换装置，包括：第一接收模块，设置为在用户设备UE由源基站向目标基站切换过程中，所述第一接收模块接收源基站发送的保持与源基站连接的指示；通信模块，设置为在所述UE释放和源基站的连接之前，所述目标基站通过信令无线承载SRB和所述UE进行通信；所述通信模块还设置为在所述UE释放和源基站的连接之后，所述目标基站通过SRB和数据无线承载DRB和所述UE进行通信。
根据本公开的另一个实施例，应用于UE，包括：第二接收模块，设置为在用户设备UE由源基站向目标基站切换过程中，所述第二接收模块接收源基站发送的保持与源基站连接的指示；第二释放模块，设置为在所述UE接收到所述源基站发送的用于指示所述UE释放与 所述源基站的连接的通知之后，所述UE释放与所述源基站的连接。
根据本公开的又一个实施例，还提供了一种存储介质。该存储介质设置为存储用于执行以下步骤的程序代码：
在用户设备UE由源基站向目标基站切换过程中，所述源基站向UE发送保持与源基站连接的指示；
在所述源基站接收所述目标基站下发的通知信息之后，所述源基站释放与所述UE的连接，其中，所述通知信息用于通知所述源基站释放与所述UE的连接。
可选地，存储介质还设置为存储用于执行以下步骤的程序代码：
在用户设备UE由源基站向目标基站切换过程中，目标基站接收源基站发送的保持与源基站连接的指示；
在所述UE释放和源基站的连接之前，所述目标基站通过信令无线承载SRB和所述UE进行通信；在所述UE释放和源基站的连接之后，所述目标基站通过SRB和数据无线承载DRB和所述UE进行通信
可选地，存储介质还设置为存储用于执行以下步骤的程序代码：
在用户设备UE由源基站向目标基站切换过程中，UE接收源基站发送的保持与源基站连接的指示；
在所述UE接收到所述源基站发送的用于指示所述UE释放与所述源基站的连接的通知之后，所述UE释放与所述源基站的连接。
根据本公开的又一个实施例，还提供了一种存储介质，所述存储介质包括存储的程序，其中，所述程序运行时执行上述的一种切换方法。
通过本公开，在UE申请切换基站的过程中，源基站向UE和目标基站均发送保持与源基站连接的指示，在源基站接收目标基站下发的通知信息之后，源基站释放与UE的连接，其中，通知信息用于通知源基站释放与UE的连接。根据目标基站下发的通知信息，源基站 及时释放了与已经切换至目标基站的UE的连接，解决了相关技术中的UE随机接入目标基站后自主释放源基站连接导致源基站无线资源浪费的问题，及时的节约了源基站的无线资源。
附图说明
此处所说明的附图用来提供对本公开的理解，构成本公开的一部分，本公开的示意性实施例及其说明用于解释本公开，并不构成对本公开的不当限定。在附图中：
图1是根据相关技术中的一种UE切换基站方法的流程图；
图2是根据相关技术中的UE的层2(layer-2)实体的结构图；
图3是根据本公开可选实施例的一种切换方法的流程图一；
图4是根据本公开可选实施例的一种切换方法的流程图二；
图5是根据本公开可选实施例的一种切换方法的流程图三；
图6是根据本公开可选实施例的一种基于定时器的切换方法的流程图；
图7是根据本公开可选实施例的一种基于定时器的切换方法的重配置SRB图；
图8是根据本公开可选实施例的一种基于定时器的切换方法的UE启动定时器流程图；
图9是根据本公开可选实施例的一种基于定时器的切换方法的重配置DRB图；
图10是根据本公开可选实施例的一种基于释放指示的切换方法的流程图；
图11是根据本公开可选实施例的一种切换失败的处理流程图，如图11所示；
图12是根据本公开可选实施例的一种切换失败的层2处理图；
图13是根据可选实施例的一种应用于源基站的切换装置的结构 框图；
图14是根据可选实施例的一种应用于目标基站的切换装置的结构框图；
图15是根据可选实施例的一种应用于UE的切换装置的结构框图；
图16是根据可选实施例的一种源基站的结构框图；
图17是根据可选实施例的一种目标基站的结构框图；
图18是根据可选实施例的一种用户设备的结构框图；
图19是根据可选实施例的一种用户设备基站切换系统的结构图。
具体实施方式
下文中将参考附图并结合实施例来详细说明本公开。需要说明的是，在不冲突的情况下，本公开中的实施例及实施例中的特征可以相互组合。
需要说明的是，本公开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用户发送随机接入前导码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。
在介绍本公开的技术方案之前，还需要说明的是，相关技术中的用户设备UE切换基站的方法如图1所示，图1是根据相关技术中的一种UE切换基站方法的流程图，步骤如下：
步骤S101，UE上报测量报告(Measurement Report)给网络层。
步骤S102，源基站(Source eNB)发送切换请求(Handover Request)给目标基站(Target eNB)，(演进型基站，Evolved Node B，简称为eNB)。
步骤S103，目标基站同意切换，回复切换请求确认(Handover Request Acknowledge)。
步骤S104，源基站发送切换命令给UE，即RRC连接重配置(RRC Connection Reconfiguration)消息，无线资源控制(Radio Resource Control，简称为RRC)。UE接收到切换命令后仍然保持与源基站(或源基站)的连接不释放，保留源基站的配置用于维护与源基站的连接，保存目标基站的配置用于后续建立于目标基站(或目标基站)的连接。
步骤S105，源基站发起数据前转过程，发送编号状态传输信息(5a.SN Status Transfer)给目标基站，并将数据前转(5b.Data forwarding)给目标基站。
步骤S106，UE在保持和源基站数据传输的同时，发起在目标的随机接入过程，通过物理随机接入信道(Physical Random Access Channel，简称为PRACH)发送随机接入请求给目标基站。
步骤S107，目标基站给UE回复随机接入响应消息(Random Access Response，简称为RAR)。UE在接收到该响应后断开与源基站的连接，应用S104中接收到的目标基站的配置重建其层2(layer-2)实体。
步骤S108，UE发送RRC连接配置完成信息(RRC Connection Reconfiguration Complete)给目标基站。
步骤S109，目标基站指示源基站释放与UE的空口连接，即UE上下文释放(UE Context Release)消息。
图2是根据相关技术中的UE的层2(layer-2)实体的结构图，如图2所示，该实体包括：包数据汇聚协议(Packet Data Convergence Protocol，简称为PDCP)；无线链路控制(Radio Link Control，简称为RLC)；媒体接入控制(Medium Access Control，简称为MAC)。
在以上描述的相关技术中的用户设备UE切换基站的过程中，在切换过程中的一般会因为无线链路失败或UE在规定时间内没有成功完成UE切换基站，此时，UE随机接入目标基站后自主释放源基站 连接，而源基站因UE没有成功完成切换而保持与UE连接，由此导致源基站无线资源浪费。
实施例1
本公开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)，该系统网络的网络架构可以包括网络侧设备(例如基站)和终端。在本实施例中提供了一种可运行于上述网络架构上的切换基站方法，需要说明的是，本公开实施例中提供的上述切换基站方法的运行环境并不限于上述网络架构。
在本实施例中提供了一种切换方法，图3是根据可选实施例的一种切换方法的流程图一，如图3所示，该流程包括如下步骤：
步骤S302，在用户设备UE由源基站向目标基站切换过程中，该源基站向UE发送保持与源基站连接的指示；
步骤S304，源基站接收目标基站下发的通知信息之后，该源基站释放与该UE的连接，其中，通知信息用于通知源基站释放与UE的连接。
可选地，该源基站向该UE发送切换命令，其中，该切换命令中携带有保持与源基站连接的指示，该切换命令用于指示该UE由该源基站切换至目标基站。UE切换基站的过程中，源基站会向目标基站请求UE与目标基站连接的上行发送资源配置信息，源基站在收到上述配置信息之后会把配置信息携带于切换命令中下发给UE，上述实施例的保持与源基站连接的指示也可以携带于切换命令中一同下发给UE。
可选地，在用户设备UE由源基站向目标基站切换过程中，该源基站还可以包括向UE发送定时器配置信息，其中，该定时器配置信息用于配置该UE与该源基站的连接时长的定时器；本实施例记载的是在源基站向该UE发送切换命令，其中，该切换命令中还可以携带有定时器配置信息，在该定时器超时之后，该源基站释放与该UE的 连接。
可选地，在该源基站向该UE发送切换命令之后，该源基站接收该目标基站下发的通知信息，其中，该通知信息用于通知该源基站释放与该UE的连接；该源基站通知该UE释放与该源基站的连接。本实施例中需要说明的是，源基站收到通知信息之后，首先将通知信息转发给UE，然后再释放与该UE的连接。本实施例记载的是在源基站向UE下发保持与源基站连接的指示或其他非定时器配置信息的情况下，由目标基站自主通知源基站释放与UE的连接，对于UE侧，目标基站或者源基站也通知UE侧释放与源基站的连接。
在实际的应用场景中，源基站释放与UE之间的连接有两种释放方式，一种方式是接收目标基站发送至源基站的通知信息，该通知信息用于指示源基站释放与UE的连接，另一种方式则是通过设定定时器配置信息，在定时器超时之后，源基站与UE释放连接。通过该两种方式从而实现在缓冲时间内可以保证源基站与UE之间的完全释放，以节省源基站无线资源。需要说明的是定时器配置信息可以对源基站与UE的连接的保持时间进行设定，实际的定时器配置信息可以根据实际经验进行设置。
可选地，在源基站向UE发送保持与源基站连接的指示之前，该源基站将该保持与源基站连接的指示发送到目标基站；该源基站接收该目标基站回复信息，其中，该回复信息用于指示该目标基站收到该保持与源基站连接的指示。在实际的应用场景中，若源基站将定时器配置信息发送至目标基站，则目标基站依据上述配置信息进行相应地操作。
需要说明的是，在用户设备UE由源基站向目标基站切换过程中，源基站向UE发送定时器配置信息或保持与源基站连接的指示，也可以是源基站向UE同时发送定时器配置信息和保持与源基站连接的指示。其中，定时器配置信息以及保持与源基站连接的指示均可携带于切换命令中。
可选地，在该UE释放和源基站的连接之前，通过数据无线承载 DRB与该UE保持连接。
根据本公开的一个实施例，提供了一种切换方法，图4是根据可选实施例的一种切换方法的流程图二，如图4所示，该流程包括如下步骤：
步骤S402，在用户设备UE由源基站向目标基站切换过程中，目标基站接收源基站发送的保持与源基站连接的指示；
步骤S404，在该UE释放和源基站的连接之前，该目标基站通过SRB和该UE进行通信；在该UE释放和源基站的连接之后，该目标基站通过SRB和DRB和该UE进行通信。
接收源基站发送的保持与源基站连接的指示UE释放和源基站的连接之前本实施例与上述实施例对应；需要说明的是，若目标基站接收源基站发送的定时器配置信息，则在定时器超时前和超时后与UE的连接采用不同方式。。
可选地，在目标基站接收源基站发送的保持与源基站连接的指示之前，该方法还包括：目标基站向UE发送随机接入响应；该目标基站接收该UE发送的控制面信令，其中，该控制面信令包括：RRC连接重配置完成消息；该目标基站通知源基站释放与UE的连接，该目标基站通知该UE释放与源基站的连接。需要说明的是，本实施例记载的是在目标基站没有接收到源基站发送的定时器配置信息的情况下，目标基站在接收到UE的RRC连接重配置完成消息之后，由目标基站自发的通知源基站和UE相互释放彼此的连接。
根据本公开的一个实施例，提供了一种切换方法，图5是根据可选实施例的一种切换方法的流程图三，如图5所示，该流程包括如下步骤：
步骤S502，在用户设备UE由源基站向目标基站切换过程中，UE接收源基站发送的保持与源基站连接的指示；
步骤S504，UE接收源基站下发的用于指示UE释放与源基站的连接的通知之后，该UE释放与该源基站的连接。
可选地，该UE接收该源基站发送的切换命令，接收源基站发送的保持与源基站连接的指示，其中，该切换命令携带保持与源基站连接的指示，该切换命令用于指示该UE由该源基站切换至目标基站。在UE切换基站的过程中，UE一定会接收到由源基站发送的用于指示目标基站配置信息的切换命令。
需要说明的是，在用户设备UE由源基站向目标基站切换过程中，UE接收源基站发送的定时器配置信息或保持与源基站连接的指示，也可以是UE接收源基站同时发送的定时器配置信息和保持与源基站连接的指示。其中，定时器配置信息以及保持与源基站连接的指示均可携带于切换命令中。
可选地，在该UE释放和源基站的连接之前，该UE通过数据无线承载DRB和该源基站保持连接。
可选地，在该UE接收源基站发送的切换命令之后，该UE接收到目标基站的随机接入响应，该UE依据该切换命令中的目标基站配置信息重配置信令无线承载SRB。无线承载包括SRB和DRB，在DRB用于与源基站连接的情况下，UE重配置SRB。
可选地，在该UE重配置该SRB之后，该UE为该SRB建立独立的MAC实体，或者，该UE的SRB和DRB共享同一个MAC实体。可选地，在该SRB和该DRB共享同一个MAC实体的情况下，该UE从该目标基站接收的上行授权信息用于该SRB的数据发送，该UE从该源基站接收的上行授权信息用于该DRB的数据发送；该UE触发和上报给该目标基站的缓存状态报告BSR仅包括SRB的缓存数据，该UE触发和上报给该源基站的BSR仅包括DRB的缓存数据。
可选地，该UE将控制面信令发送给目标基站，其中，该控制面信令包括：RRC连接重配置完成消息；该UE接收目标基站或者源基站的通知消息，其中，该通知消息用于通知该UE释放与源基站的连接。需要说明的是本实施例记载的是UE在没有接收到源基站下发的定时器配置信息的情况下，直接与目标基站进行信息沟通，由目标基 站通知UE和源基站两侧分别释放彼此之间的连接。
可选地，在该UE接收到该目标基站的随机接入响应之后，在该UE释放和源基站的连接之前，该UE通过SRB和该目标基站进行数据传输；在该UE释放和源基站的连接之后，该UE通过该SRB和DRB与该目标基站进行数据传输。
可选地，在该定时器超时之后，该UE依据该切换命令中的目标基站配置信息重配置无线承载RB。可选地，在该UE重配置RB之前，在该UE的SRB和DRB采用相同的MAC实体的情况下，该UE采用该目标基站配置信息重新配置DRB和SRB的层2实体；在该UE的SRB和DRB采用不同的MAC实体的情况下，该UE采用该目标基站配置信息对DRB对应的层2实体进行重建；该UE释放SRB对应的MAC实体后并将该SRB重配置为和该DRB相同的MAC实体，或者，该UE释放SRB对应的层2实体后并重建该SRB为和该DRB相同的MAC实体。上述实施例记载的UE重配置无线承载RB的详细步骤，SRB和DRB采用相同MAC实体的情况下有一种重配置方法，SRB和DRB采用不同的MAC实体的情况下有两种重配置方法。
可选地，在该UE将该RB重配置之后，该UE的BSR的触发和上报包括该DRB和该SRB的数据，该UE收到的该目标基站的上行授权同时可用于该DRB和该SRB的数据发送。
可选地，在该UE接收源基站发送的切换命令之后，该UE使用目标基站配置信息建立与目标基站的连接，在与目标基站建立连接失败的情况下，该UE保持与源基站的连接，该UE释放该目标基站配置信息。在UE切换基站的过程中难免存在切换基站失败的情况，如果切换到目标基站失败了，UE与源基站保持连接，之后，网络侧可以重新触发UE切换基站过程。可选地，上述实施例中该建立连接失败的指示信息包括以下之一类型：切换失败；随机接入失败；物理层RLM检测失败；RLC重传失败。
图6是根据本公开可选实施例的一种基于定时器的切换方法的 流程图，如图6所示，步骤如下：
步骤S601，源基站将“保持UE在源基站连接的定时器”配置信息(相当于上述实施例中的定时器配置信息)发送给目标基站，该配置信息可以包括：定时器的期望时长。该配置信息指示要保持UE在源基站的连接。(如图6中S601所示的“Handover Request”消息中的“Timer”配置和“Remain Connection Indication”的指示)
步骤S602，目标基站设定“保持UE在源基站连接的定时器”配置，设定指示UE要保持在源基站的连接，并发送给源基站。(如图6中S602所示的“Handover Request Acknowledge”消息中的“Timer”配置和“Remain Connection Indication”指示)
步骤S603，源基站在下发切换命令的时候将“保持UE在源基站连接的定时器”配置下发给UE，将保持在源基站连接的指示下发给UE，源基站记录UE的“保持UE在源基站连接的定时器”的超时时刻，在该定时器超时前源基站通过DRB和UE进行数据收发，在该定时器超时后源基站释放UE的源基站连接。(如图6中S603中所示的“RRC Connection Reconfiguration”消息中的“Timer”配置和“Remain Connection Indication”指示)(在图8之后，有图6后续的步骤记载)
UE接收到切换命令后，启动“保持UE在源基站连接的定时器”，并在“保持UE在源基站连接的定时器”超时前保持和源基站的连接，并通过DRB和源基站进行数据通信。
图7是根据本公开可选实施例的一种基于定时器的切换方法的重配置SRB图，如图7所示，UE根据目标小区的配置信息将SRB进行重配置。该SRB的重配置可以有以下两种方式：
方式1(如图7中方法method1):UE的SRB和DRB共享同一个MAC实体，UE从目标基站接收的上行授权信息用于SRB的数据发送，从源基站接收的上行授权信息用于DRB的数据发送。UE触发和上报给目标基站的BSR只包括SRB的缓存数据，UE触发和上报给源基站的BSR只包括DRB的缓存数据。
方式2(如图7中method2):UE可以为该SRB建立独立的MAC实体，该MAC实体对应于目标基站的连接。
图8是根据本公开可选实施例的一种基于定时器的切换方法的UE启动定时器流程图，如图8所示：UE在t1时刻接收到该定时器的配置，包括了该定时器的总时长(Toverall)。UE在t2时刻，由于对于信息的处理延时(Tue),导致UE只能在t2时刻才能启动该定时器，因此UE在启动定时器的时候，定时器的超时时长应该排除UE的处理延时为(Toverall-Tue)。
如图6所示，在图6的后续步骤中：
步骤S604，源基站发起给目标基站的数据前转过程。(如图6中S604的“SN Status Transfer”和S601的“Data Forwarding”)
步骤S605，UE发起向目标基站的随机接入过程。(如图6S605的“PRACH”)
步骤S606，目标基站回复随机接入响应。(如图6中S606的“RAR”)
步骤S607，UE将“保持UE在源基站连接的定时器”的剩余时长报告给目标基站，(如图6中S607的“RRC Connection Reconfiguration Complete”的“Remaining Time”和图8中的“Tremain”)。该剩余时长可以额外的包括UE定时器超时后对层2实体进行重配置的处理延时(如图8中Tlayer2)。目标基站记录UE的“保持UE在源基站连接的定时器”超时时刻的剩余时长，目标基站在UE的“保持UE在源基站连接的定时器”超时前，通过SRB和UE进行通信。目标基站在UE的“保持UE在源基站连接的定时器”超时后，通过SRB和DRB和UE进行通信。
目标基站对于UE的“保持UE在源基站连接的定时器”超时时刻的剩余时长可以按照图8方式处理：目标基站在t3时刻接收到该定时器的配置，包括了该定时器的剩余时长(Tremain)。目标基站在t4时刻，由于对于信息的处理延时(TeNB),导致目标基站只能在t4 时刻才能获得该剩余时长，从t4时刻算起，因此eNB认为距离t5时刻的结束时间为(Tremain-TeNB)。
步骤S608，UE在重配置其层2实体结束后通知目标基站其重配置完成。(如图6中S608的“Reset Confirmation”)
图9是根据本公开可选实施例的一种基于定时器的切换方法的重配置DRB图，UE在重配置其层2实体的方式可以按照图9所示进行：
如果UE的SRB当前配置方式为S603中方式1,则UE采用目标基站的配置重新配置DRB和SRB的层2实体。
如果UE的SRB当前配置方式为S603中方式2，UE采用目标基站的配置对DRB对应的层2实体进行重建，UE释放SRB对应的MAC实体将该SRB重配置为和DRB相同的MAC实体，或UE释放SRB对应的层2实体后再重建该SRB为和DRB相同的MAC实体。
图10是根据本公开可选实施例的一种基于释放指示的切换方法的流程图，如图10所示，步骤如下：
步骤S1001，源基站向目标基站发送切换请求。并指示要保持UE在源基站的连接。(如图10中S1001所示的“Handover Request”消息中的“Remain Connection Indication”的指示)
步骤S1002，目标基站向源基站发送切换请求响应，并指示UE要保持在源基站的连接。(如图10中S1002所示的“Handover Request Acknowledge”消息中的“Remain Connection Indication”指示)
步骤S1003，源基站在下发切换命令的时候将保持在源基站连接的指示下发给UE，源基站通过DRB和UE进行数据收发。(如图10中S1003所示的“RRC Connection Reconfiguration”消息中的“Remain Connection Indication”指示)
UE接收到切换命令后，保持和源基站的连接，并通过DRB和源基站进行数据通信。UE根据目标小区的配置信息将SRB进行重配置,该SRB的重配置方式同S603中记载的方式。
步骤S1004，源基站发起给目标基站的数据前转过程。(如图10中S1004的“SN Status Transfer”和S1004的“Data Forwarding”)
步骤S1005，UE发起向目标基站的随机接入过程。(如图10中S1005的“PRACH”)
步骤S1006，目标基站回复随机接入响应。(如图10中S1006的“RAR”)
步骤S1007，UE将RRC连接重配置完成消息上报给目标基站，(如图10中S1007的“RRC Connection Reconfiguration Complete”)。目标基站通过SRB和UE进行通信。
步骤S1008，目标基站通知源基站释放UE的源基站连接。(如图10中S1008的“UE Context Release”消息)
步骤S1009，源基站释放UE的源基站连接，通知目标基站释放结果。(如图10中S1009的“Release Confirmation”消息)
步骤S1010，目标基站通知UE释放源基站的连接。(如图10中S1010的“RRC Connection Reconfiguration”消息中的“Release Indication”指示)
步骤S1011，UE释放源基站的连接，重配置其层2实体，并发送确认消息通知目标基站。(如图10中的“RRC Connection Reconfiguration Complete”消息)
UE重配置其层2实体的方式同S608记载的方式。
图11是根据本公开可选实施例的一种切换失败的处理流程图，如图11所示。
步骤S1101，源基站给UE下发切换命令，并指示保持在源基站的连接。UE重配置SRB的方式同S603记载的方式。
步骤S1102，如果在切换过程中UE发生了无线连接的失败，UE保持和源基站的数据通信，不触发连接重建立过程，UE上报失败指示给网络侧，该失败指示信息可以包括失败类型：切换失败；随机接 入失败；物理层RLM检测失败；RLC重传失败。UE释放目标基站的配置信息。(如图11中S1102的“Failure Indication”消息)
图12是根据本公开可选实施例的一种切换失败的层2处理图，如图12所示，UE的层2可以按照图12方式处理：
方式1：如果UE当前的SRB和DRB共用同一个MAC实体，UE用源基站的配置信息重配置SRB实体。
方式2：如果UE的SRB和DRB是采用不同的MAC实体，UE采用源基站的配置对SRB进行重配置，UE释放SRB对应的MAC实体将该SRB重配置为和DRB相同的MAC实体，或UE释放SRB对应的层2实体后再重建该SRB为和DRB相同的MAC实体。
源基站接收到UE指示后，可以选择其他小区对UE进行切换。
通过以上的实施方式的描述，本领域的技术人员可以清楚地了解到根据上述实施例的方法可借助软件加必需的通用硬件平台的方式来实现，当然也可以通过硬件，但很多情况下前者是更佳的实施方式。基于这样的理解，本公开的技术方案本质上或者说对相关技术做出贡献的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质(如ROM/RAM、磁碟、光盘)中，包括若干指令用以使得一台终端设备(可以是手机，计算机，服务器，或者网络设备等)执行本公开各个实施例该的方法。
实施例2
在本实施例中还提供了一种切换装置，该装置用于实现上述实施例及可选实施方式，已经进行过说明的不再赘述。如以下所使用的，术语“模块”可以实现预定功能的软件和/或硬件的组合。尽管以下实施例所描述的装置较佳地以软件来实现，但是硬件，或者软件和硬件的组合的实现也是可能并被构想的。
图13是根据可选实施例的一种切换装置的结构框图，如图13所示，该装置包括：
发送模块1302，设置为在用户设备UE由源基站向目标基站切换 过程中，该发送模块1302向UE发送保持与源基站连接的指示；
第一释放模块1304，与该发送模块1302连接，设置为在源基站接收目标基站下发的通知信息之后，该源基站释放与该UE的连接，其中，通知信息用于通知源基站释放与UE的连接。
图14是根据可选实施例的一种切换装置的结构框图，如图14所示，该装置包括：
第一接收模块1402，设置为在用户设备UE由源基站向目标基站切换过程中，该第一接收模块1402接收源基站发送的保持与源基站连接的指示；
通信模块1404，与该第一接收模块1402连接，设置为在该UE释放和源基站的连接之前，该目标基站通过信令无线承载SRB和该UE进行通信；该通信模块1404还设置为在该UE释放和源基站的连接之后，该目标基站通过SRB和数据无线承载DRB和该UE进行通信。
图15是根据可选实施例的一种应用于UE的切换装置的结构框图，如图15所示，该装置包括：
第二接收模块1502，设置为在用户设备UE由源基站向目标基站切换过程中，该第二接收模块1502接收源基站发送的保持与源基站连接的指示；
第二释放模块1504，与该第二接收模块1502连接，设置为UE接收源基站下发的用于指示UE释放与源基站的连接的通知之后，该UE释放与该源基站的连接。
需要说明的是，上述各个模块是可以通过软件或硬件来实现的，对于后者，可以通过以下方式实现，但不限于此：上述模块均位于同一处理器中；或者，上述各个模块以任意组合的形式分别位于不同的处理器中；或者，处理器的功能用以实现上述各模块。
实施例3
本公开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：
S1，在用户设备UE由源基站向目标基站切换过程中，源基站向UE发送保持与源基站连接的指示；
S2，在源基站接收目标基站下发的通知信息之后，源基站释放与UE的连接，其中，通知信息用于通知源基站释放与UE的连接。
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：
S3，在用户设备UE由源基站向目标基站切换过程中，目标基站接收源基站发送的保持与源基站连接的指示；
S4，在UE释放和源基站的连接之前，目标基站通过信令无线承载SRB和UE进行通信；在UE释放和源基站的连接之后，目标基站通过SRB和数据无线承载DRB和UE进行通信。
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：
S5，在用户设备UE由源基站向目标基站切换过程中，UE接收源基站发送的保持与源基站连接的指示；
S6，在UE接收源基站下发的用于指示UE释放与源基站的连接的通知之后，UE释放与源基站的连接。
实施例4
本公开的实施例还提供了一种源基站，如图16所示，该源基站包括：存储器1602和处理器1604，其中，处理器1602用于执行存储器1604中存储的执行指令，在本实施例中，上述存储器1604中还设置为存储有以下执行指令：
S1，在用户设备UE由源基站向目标基站切换过程中，源基站向UE发送保持与源基站连接的指示；
S2，在源基站接收目标基站下发的通知信息之后，源基站释放与UE的连接，其中，所述通知信息用于通知所述源基站释放与所述UE的连接。
实施例5
本公开的实施例还提供了一种目标基站，如图17所示，该目标基站包括：存储器1702和处理器1704，其中，处理器1704用于执行存储器1702中存储的执行指令，在本实施例中，上述存储器1702中还设置为存储有以下执行指令：
S1，在用户设备UE由源基站向目标基站切换过程中，目标基站接收源基站发送的保持与源基站连接的指示；
S2，在UE释放和源基站的连接之前，目标基站通过信令无线承载SRB和UE进行通信；在UE释放和源基站的连接之后，目标基站通过SRB和数据无线承载DRB和UE进行通信
实施例6
本公开的实施例还提供了一种用户设备，如图18所示，该用户设备UE包括：存储器1802和处理器1804，其中，处理器1804用于执行存储器1802中存储的执行指令，在本实施例中，上述存储器1802中还设置为存储有以下执行指令：
S1，在用户设备UE由源基站向目标基站切换过程中，UE接收源基站发送的保持与源基站连接的指示；
S2，在UE接收源基站下发的用于指示UE释放与源基站的连接的通知之后，UE释放与源基站的连接，其中，通知信息用于通知源基站释放与UE的连接。
实施例7
本公开的实施例还提供了一种用户设备基站切换系统，如图19所示，该用户设备基站切换系统包括：
源基站1902，设置为在用户设备1906由源基站1902向目标基站1904切换过程中，源基站1902向目标基站1904发送的保持与源基站1902连接的指示，设置为源基站1902接收目标基站1904下发的通知信息之后，源基站1902释放与用户设备1906的连接，其中， 通知信息用于通知源基站1902释放与用户设备1906的连接；
目标基站1904，设置为在在用户设备1906由源基站1902向目标基站1904切换过程中，目标基站1904接收源基站1902发送的保持与源基站1802连接的指示；在用户设备1906释放和源基站1902的连接之前，目标基站1904通过信令无线承载SRB和用户设备1906进行通信；在用户设备1906释放和源基站1902的连接之后，目标基站1904通过SRB和数据无线承载DRB和用户设备1906进行通信。
用户设备1906，设置为在用户设备1906由源基站1902向目标基站1904切换过程中，用户设备1906接收源基站1902发送的保持与源基站1902连接的指示；在用户设备1906接收源基站1902下发的用于指示用户设备1906释放与源基站1906的连接的通知之后，用户设备1906释放与源基站1902的连接。
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，本实施例中的示例可以参考上述实施例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，上述的本公开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，本公开不限制于任何特定的硬件和软件结合。
以上所述仅为本公开的可选实施例而已，并不用于限制本公开，对于本领域的技术人员来说，本公开可以有各种更改和变化。凡在本公开的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本公开的保护范围之内。
工业实用性
在本公开的技术方案中，通过在用户设备UE申请切换基站的过程中，源基站向UE和目标基站均发送保持与源基站连接的指示，在源基站接收目标基站下发的通知信息之后，源基站释放与UE的连接，其中，所述通知信息用于通知所述源基站释放与所述UE的连接。根据目标基站下发的通知信息，源基站及时释放了与已经切换至目标基站的UE的连接，解决了相关技术中的UE随机接入目标基站后自主释放源基站连接导致源基站无线资源浪费的问题，及时的节约了源基站的无线资源。

Claims (21)

  1. 一种切换方法，包括：
    在用户设备UE由源基站向目标基站切换过程中，所述源基站向UE发送保持与源基站连接的指示；
    在所述源基站接收所述目标基站下发的通知信息之后，所述源基站释放与所述UE的连接，其中，所述通知信息用于通知所述源基站释放与所述UE的连接。
  2. 根据权利要求1所述的方法，其中，所述方法还包括：
    所述源基站向所述UE发送切换命令，其中，所述切换命令中携带有所述保持与源基站连接的指示，所述切换命令用于指示所述UE由所述源基站切换至目标基站。
  3. 根据权利要求2所述的方法，其中，在所述源基站向所述UE发送切换命令之后，所述方法还包括：
    所述源基站接收所述目标基站下发的所述通知信息；
    在所述源基站释放与所述UE的连接之前，所述源基站通知所述UE释放与所述源基站的连接。
  4. 根据权利要求1所述的方法，其中，在源基站向UE发送保持与源基站连接的指示之前，所述方法还包括：
    所述源基站将所述保持与源基站连接的指示发送到目标基站；
    所述源基站接收所述目标基站回复信息，其中，所述回复信息用于指示所述目标基站收到所述保持与源基站连接的指示。
  5. 根据权利要求1所述的方法，其中，所述方法还包括：
    在所述UE释放和源基站的连接之前，所述源基站通过数据无线承载DRB与所述UE保持连接。
  6. 一种切换方法，包括：
    在用户设备UE由源基站向目标基站切换过程中，目标基站接收源基站发送的保持与源基站连接的指示；
    在所述UE释放和源基站的连接之前，所述目标基站通过信令无线承载SRB和所述UE进行通信；在所述UE释放和源基站的连接之后，所述目标基站通过SRB和数据无线承载DRB和所述UE进行通信。
  7. 根据权利要求6所述的方法，其中，在目标基站接收源基站发送的保持与源基站连接的指示之后，所述方法还包括：
    目标基站在向源基站发送的切换命令中携带所述保持与源基站连接的指示；
    目标基站向UE发送随机接入响应；
    所述目标基站接收所述UE发送的控制面信令，其中，所述控制面信令包括：无线资源控制RRC连接重配置完成消息；
    所述目标基站通知源基站释放与UE的连接，所述目标基站通知所述UE释放与源基站的连接。
  8. 一种切换方法，包括：
    在用户设备UE由源基站向目标基站切换过程中，UE接收源基站发送的保持与源基站连接的指示；
    在所述UE接收到所述源基站发送的用于指示所述UE释放与所述源基站的连接的通知之后，所述UE释放与所述源基站的连接。
  9. 根据权利要求8所述的方法，其中，所述方法还包括：
    所述UE接收所述源基站发送的切换命令，其中，所述切换命令携带有所述保持与源基站连接的指示，所述切换命令用于指示所述UE由所述源基站切换至目标基站。
  10. 根据权利要求8所述的方法，其中，所述方法还包括：
    在所述UE释放和源基站的连接之前，所述UE通过数据无线承载DRB和所述源基站保持连接。
  11. 根据权利要求8所述的方法，其中，所述方法还包括：
    在所述UE接收源基站发送的切换命令之后，所述UE接收到目标基站的随机接入响应，所述UE依据所述切换命令中的目标基站配置信息重配置信令无线承载SRB。
  12. 根据权利要求11所述的方法，其中，所述方法还包括：
    在所述UE重配置所述SRB之后，所述UE为所述SRB建立独立的媒体接入控制MAC实体，或者，所述UE的SRB和DRB共享同一个MAC实体。
  13. 根据权利要求12所述的方法，其中，所述方法还包括：
    在所述SRB和所述DRB共享同一个MAC实体的情况下，所述UE从所述目标基站接收的上行授权信息用于所述SRB的数据发送，所述UE从所述源基站接收的上行授权信息用于所述DRB的数据发送；
    所述UE触发和上报给所述目标基站的缓存状态报告BSR仅包括SRB的缓存数据，所述UE触发和上报给所述源基站的BSR仅包括DRB的缓存数据。
  14. 根据权利要求13所述的方法，其中，所述方法还包括：
    所述UE将控制面信令发送给目标基站，其中，所述控制面信令包括：无线资源控制RRC连接重配置完成消息；
    所述UE接收目标基站或者源基站的通知消息，其中，所述通知消息用于通知所述UE释放与源基站的连接。
  15. 根据权利要求11所述的方法，其中，在所述UE接收到所述目标基站的随机接入响应之后，所述方法还包括：
    在所述UE释放和源基站的连接之前，所述UE通过SRB和所述目标基站进行数据传输；
    在所述UE释放和源基站的连接之后，所述UE通过所述SRB和DRB与所述目标基站进行数据传输。
  16. 根据权利要求8所述的方法，其中，在所述UE接收源基站发送的切换命令之后，所述方法还包括：
    所述UE使用目标基站配置信息建立与目标基站的连接，在与目标基站建立连接失败的情况下，所述UE保持与源基站的连接，所述UE释放所述目标基站配置信息，所述UE向源基站上报与目标基站建立连接失败的指示信息。
  17. 根据权利要求16所述的方法，其中，所述建立连接失败的指示信息包括以下之一类型：切换失败；随机接入失败；物理层RLM检测失败；无线链路控制RLC重传失败。
  18. 一种切换装置，包括：
    发送模块，设置为在用户设备UE由源基站向目标基站切换过程中，所述发送模块向UE发送保持与源基站连接的指示；
    第一释放模块，设置为在所述源基站接收所述目标基站下发的通知信息之后，所述源基站释放与所述UE的连接，其中，所述通知信息用于通知所述源基站释放与所述UE的连接。
  19. 一种切换装置，包括：
    第一接收模块，设置为在用户设备UE由源基站向目标基站切换过程中，所述第一接收模块接收源基站发送的保持与源基站连接的指示；
    通信模块，设置为在所述UE释放和源基站的连接之前，所述目标基站通过信令无线承载SRB和所述UE进行通信；所述通信模块还设置为在所述UE释放和源基站的连接之后，所述目标基站通过SRB和数据无线承载DRB和所述UE进行通信。
  20. 一种切换装置，包括：
    第二接收模块，设置为在用户设备UE由源基站向目标基站切换过程中，所述第二接收模块接收源基站发送的保持与源基站连接的指示；
    第二释放模块，设置为在所述UE接收到所述源基站发送的用于指示所述UE释放与所述源基站的连接的通知之后，所述UE释放与所述源基站的连接。
  21. 一种存储介质，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5、6至7或8至17中任一项所述的方法。
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210195481A1 (en) * 2018-09-27 2021-06-24 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Method for Handover Report and Terminal Device
EP3958617A4 (en) * 2019-05-14 2022-07-20 Guangdong Oppo Mobile Telecommunications Corp., Ltd. METHOD OF SWITCHING BETWEEN ACCESS NETWORK DEVICES, TERMINAL DEVICE AND NETWORK DEVICE
CN114928863A (zh) * 2022-02-17 2022-08-19 北京邮电大学 高速移动下的上行通信方法及相关设备

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019153361A1 (zh) * 2018-02-12 2019-08-15 Oppo广东移动通信有限公司 无线通信的方法和终端设备
CN108834203B (zh) * 2018-06-29 2021-01-26 Oppo（重庆）智能科技有限公司 网络切换方法、装置、终端及存储介质
WO2020056562A1 (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、设备及存储介质
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
EP3840472B1 (en) 2018-09-27 2023-01-18 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Timer-based processing method, terminal device and network device
WO2020061876A1 (zh) * 2018-09-27 2020-04-02 华为技术有限公司 一种数据传输停止方法及装置
CN111182590B (zh) * 2018-11-09 2022-12-13 维沃移动通信有限公司 一种小区切换方法、终端和通信节点
EP3912419A4 (en) * 2019-01-14 2022-01-05 ZTE Corporation Mobility enforcement in connected wireless state
WO2020155073A1 (zh) * 2019-01-31 2020-08-06 华为技术有限公司 一种小区切换的方法及装置
WO2020167209A1 (en) * 2019-02-14 2020-08-20 Telefonaktiebolaget Lm Ericsson (Publ) A user equipment and methods therein for performing handover
WO2020191556A1 (zh) * 2019-03-22 2020-10-01 Oppo广东移动通信有限公司 一种切换处理方法、终端设备及网络设备
WO2021003619A1 (zh) * 2019-07-05 2021-01-14 Oppo广东移动通信有限公司 一种条件切换指示方法、终端设备、源基站及存储介质
JP7480867B2 (ja) * 2020-05-18 2024-05-10 日本電気株式会社 通信装置、及び方法
WO2022015231A1 (en) * 2020-07-17 2022-01-20 Telefonaktiebolaget Lm Ericsson (Publ) Control plane connection migration in an integrated access backhaul network

Citations (5)

* 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
CN101577946A (zh) * 2009-06-12 2009-11-11 华为技术有限公司 无缝切换方法、装置和系统
CN102123457A (zh) * 2010-01-11 2011-07-13 中兴通讯股份有限公司 切换方法及终端
CN102724722A (zh) * 2011-03-30 2012-10-10 中国移动通信集团公司 一种切换系统、方法、装置和相关设备
US20140087731A1 (en) * 2011-05-25 2014-03-27 Huawei Technologies Co., Ltd. Handover method and base station

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7623509B2 (en) * 2004-06-14 2009-11-24 Nokia Corporation Enhanced handling of system information messages when moving from dual transfer mode to packet transfer mode
CN101494884B (zh) * 2008-01-21 2012-10-10 中兴通讯股份有限公司 切换异常处理方法
CN101572920A (zh) * 2008-04-28 2009-11-04 中兴通讯股份有限公司 一种提高专用前导序列使用效率的方法及终端切换方法
CN101848511B (zh) * 2009-03-24 2013-01-02 华为技术有限公司 业务切换方法、相关设备及系统
WO2010115313A1 (zh) * 2009-04-10 2010-10-14 深圳华为通信技术有限公司 切换方法、装置和系统
ATE512556T1 (de) * 2009-04-20 2011-06-15 Alcatel Lucent Weiterreichungsverfahren
CN101998558B (zh) * 2009-08-14 2014-10-08 华为技术有限公司 一种小区切换的方法、基站及系统
CN102238665B (zh) * 2010-05-05 2016-03-30 中兴通讯股份有限公司 随机接入方法、基站、用户设备及系统
CN103139851A (zh) * 2011-12-02 2013-06-05 华为技术有限公司 一种资源释放控制方法及接入设备
CN102695225B (zh) * 2012-05-11 2014-12-24 中国联合网络通信集团有限公司 基站直通架构下的用户切换方法及基站
JP5835485B2 (ja) * 2012-07-18 2015-12-24 日本電気株式会社 無線基地局、移動通信システム、ハンドオーバ制御方法およびプログラム
CN103782628A (zh) * 2013-04-18 2014-05-07 华为技术有限公司 通信方法、设备和系统
CN104349409B (zh) * 2013-07-30 2019-11-05 中兴通讯股份有限公司 一种小区切换方法和基站

Patent Citations (5)

* 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
CN101577946A (zh) * 2009-06-12 2009-11-11 华为技术有限公司 无缝切换方法、装置和系统
CN102123457A (zh) * 2010-01-11 2011-07-13 中兴通讯股份有限公司 切换方法及终端
CN102724722A (zh) * 2011-03-30 2012-10-10 中国移动通信集团公司 一种切换系统、方法、装置和相关设备
US20140087731A1 (en) * 2011-05-25 2014-03-27 Huawei Technologies Co., Ltd. Handover method and base station

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210195481A1 (en) * 2018-09-27 2021-06-24 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Method for Handover Report and Terminal Device
US11665601B2 (en) * 2018-09-27 2023-05-30 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Method for handover report and terminal device
EP3958617A4 (en) * 2019-05-14 2022-07-20 Guangdong Oppo Mobile Telecommunications Corp., Ltd. METHOD OF SWITCHING BETWEEN ACCESS NETWORK DEVICES, TERMINAL DEVICE AND NETWORK DEVICE
US12004033B2 (en) 2019-05-14 2024-06-04 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Method for switching between access network devices, terminal device, and network device
CN114928863A (zh) * 2022-02-17 2022-08-19 北京邮电大学 高速移动下的上行通信方法及相关设备
CN114928863B (zh) * 2022-02-17 2024-05-28 北京邮电大学 高速移动下的上行通信方法及相关设备

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