WO2014106483A1 - 一种承载分离场景下进行切换的方法、设备及系统 - Google Patents

一种承载分离场景下进行切换的方法、设备及系统 Download PDF

Info

Publication number
WO2014106483A1
WO2014106483A1 PCT/CN2014/070139 CN2014070139W WO2014106483A1 WO 2014106483 A1 WO2014106483 A1 WO 2014106483A1 CN 2014070139 W CN2014070139 W CN 2014070139W WO 2014106483 A1 WO2014106483 A1 WO 2014106483A1
Authority
WO
WIPO (PCT)
Prior art keywords
base station
macro base
local node
handover
sent
Prior art date
Application number
PCT/CN2014/070139
Other languages
English (en)
French (fr)
Inventor
付喆
张大钧
Original Assignee
电信科学技术研究院
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 电信科学技术研究院 filed Critical 电信科学技术研究院
Priority to US14/759,233 priority Critical patent/US10051529B2/en
Priority to EP14735249.6A priority patent/EP2943008B1/en
Publication of WO2014106483A1 publication Critical patent/WO2014106483A1/zh

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0055Transmission or use of information for re-establishing the radio link
    • H04W36/0058Transmission of hand-off measurement information, e.g. measurement reports
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0011Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0033Control or signalling for completing the hand-off for data sessions of end-to-end connection with transfer of context information
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0011Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0027Control or signalling for completing the hand-off for data sessions of end-to-end connection for a plurality of data sessions of end-to-end connections, e.g. multi-call or multi-bearer end-to-end data connections
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0055Transmission or use of information for re-establishing the radio link
    • H04W36/0069Transmission or use of information for re-establishing the radio link in case of dual connectivity, e.g. decoupled uplink/downlink
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0055Transmission or use of information for re-establishing the radio link
    • H04W36/0079Transmission or use of information for re-establishing the radio link in case of hand-off failure or rejection
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0083Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/00835Determination of neighbour cell lists
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W84/00Network topologies
    • H04W84/02Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04Large scale networks; Deep hierarchical networks
    • H04W84/042Public Land Mobile systems, e.g. cellular systems
    • H04W84/045Public Land Mobile systems, e.g. cellular systems using private Base Stations, e.g. femto Base Stations, home Node B

Definitions

  • E-UTRAN is composed of an eNB (Evolved Base Station).
  • the network architecture of the E-UTRAN is shown in Figure 1.
  • the eNB completes the access network function and communicates with the user equipment (UE, User Equipment) through air interfaces.
  • UE User Equipment
  • MME Mobility Management Entity
  • the MME and the eNB use the S1-MME interface to connect, S1 -
  • the MME interface provides control plane services for the UE, including mobility management and bearer management functions; for each UE attached to the network, there is a Serving Gateway (S-GW) serving the same, the S-GW is called Serving the S-GW for the UE.
  • S-GW Serving Gateway
  • the S-GW is connected to the eNB by using an S1-U interface, and the S1-U interface provides a user plane service for the UE.
  • the user plane data of the UE is transmitted between the S-GW and the eNB through the S1-U bearer.
  • the 3rd Generation Partnership Project 3Fd Generation Partnership Project, 3GPP
  • the network architecture of the sub-housing network is shown in Figure 2.
  • the macro base station (Macro eNB) provides basic coverage
  • the low-power local base station (Local eNB) provides hotspot coverage.
  • the local node and the Macro eNB There is a data/signaling interface (which may be a wired or wireless interface), and the UE can work under the Macro eNB or the local base station.
  • the X2 handover process includes the following steps:
  • Step 301 The source eNB performs measurement configuration on the UE, and the UE performs measurement according to the received measurement configuration information.
  • Step 302 The UE sends a measurement result to the source eNB, where the measurement result is used to assist the source eNB to perform a handover decision.
  • Step 305 The target eNB performs admission control according to the received handover request message, and configures a new bearer, including a Signaling Radio Bearer (SRB) and a Packet Data Convergence Protocol (PDCP). Radio Link Control (RLC) / Medium Access Control (MAC) entity. If the configuration is successful, step 306 is performed;
  • SRB Signaling Radio Bearer
  • PDCP Packet Data Convergence Protocol
  • RLC Radio Link Control
  • MAC Medium Access Control
  • Step 306 The target eNB returns a handover request response message to the source eNB.
  • Step 307 The source eNB informs the UE of the received handover command by using a Radio Resource Control (RRC) reconfiguration message, and stops data transmission and reception for the UE on the local base station; after receiving the RRC reconfiguration message, the UE receives the RRC reconfiguration message. Stop data transmission and reception on the source eNB;
  • RRC Radio Resource Control
  • Step 308 The source eNB sends the serial number (SN) status information of the current data to the target eNB.
  • Step 309 The UE initiates an uplink/downlink synchronization process to the target eNB, and after completing the downlink synchronization, initiates a non-contention random access process;
  • Step 310 The target eNB returns a Random Access Channel (RACH) response (Response) message, and carries the uplink resource and the Timing Advance (TA) allocated for the UE.
  • RACH Random Access Channel
  • TA Timing Advance
  • Step 311 The UE returns a handover complete message (ie, an RRC reconfiguration complete message to the target eNB); thereafter, data can be sent and received between the UE and the target eNB;
  • a handover complete message ie, an RRC reconfiguration complete message to the target eNB
  • the target eNB after receiving the RRC reconfiguration complete message, the target eNB returns an Acknowledgement (ACK) message of the RLC; and after receiving the ACK message of the RRC reconfiguration complete message, the UE starts to send the uplink data of the user plane. ;
  • Step 312 The target eNB initiates a path switch request to the MME.
  • Step 313 The MME initiates a bearer modification request to the S-GW.
  • Step 314 The S-GW performs path conversion.
  • Step 315 The S-GW returns a bearer modification response to the MME.
  • Step 316 The MME returns a path switching response to the target eNB; at this point, the path switching is completed.
  • Step 317 The target eNB sends a UE context release indication to the source eNB.
  • Step 318 The source eNB releases related resources allocated to the switched UE.
  • the proposed network architecture for bearer separation includes the following two types: Architecture 1. As shown in Figure 4, under the architecture, all SRBs of the UE are maintained in the Marco eNB, and all or part of the Data Radio Bearer (DRB) is transferred to The Local eNB transmits. The dotted line interface in the figure exists only when the DRB is partially loaded.
  • DRB Data Radio Bearer
  • the Local eNB may have some RRC management functions (such as radio resource management or measurement, etc.), but the RRC connection is still maintained at the Marco eNB.
  • HetNet heterogeneous networks
  • a Small Cell is deployed within the macro coverage of multiple macro base stations.
  • the Small Cell in FIG. 6 is located at the intersection of two macro base stations.
  • a UE in a bearer-separated state may need to switch from one macro base station (referred to as a source macro base station) to another macro base station (referred to as a target macro base station).
  • a source macro base station referred to as a source macro base station
  • a target macro base station referred to as a target macro base station
  • bearer separation it is a scheme in which the UE performs handover between macro base stations in a bearer separation scenario in which a local node Local eNB/Small Cell is shared by multiple macro base stations.
  • the embodiments of the present invention provide a method, a device, and a system for performing handover in a bearer-separated scenario, and a specific implementation scheme for the UE to switch between macro base stations in a bearer-separated scenario.
  • the processing scheme of data transmission during the handover process is not limited to the existing protocol.
  • the source macro base station After determining that the handover process of the user equipment UE is required, the source macro base station sends a handover request to each candidate target macro base station, where the handover request carries status information indicating that the UE is in a bearer separation, and the current location of the UE Local node information, and/or bearer information currently being used by the UE on the local node;
  • the source macro base station selects, from the candidate target macro base station that returns the handover request response, the target macro base station that performs handover for the UE, and sends a handover command carried in the handover request response returned by the handover target macro base station to the
  • the UE stops transmitting data to the UE and stops receiving data sent by the UE.
  • a method for performing handover in a bearer separation scenario includes: After receiving the handover request sent by the source macro base station, the candidate target macro base station performs an admission decision, where the handover request carries state information indicating that the UE is in a bearer separation manner;
  • the candidate target macro base station performs a bottom house configuration of the UE in the base station, and returns a handover request response message to the source macro base station, when determining that the UE is allowed to accept the UE and supports the bearer separation.
  • the handover request response carries a bearer separation support acknowledgement message and a handover command for instructing the UE to perform handover.
  • the UE After receiving the handover command sent by the source macro base station, and after the handover command carries the bearer separation support acknowledgement message, the UE stops sending data to the source macro base station and stops receiving data sent by the source macro base station, and switches to The target macro base station initiates a synchronization process, where the UE stops transmitting data to the local node and stops receiving data sent by the local node, or maintains sending data to the local node and receiving data sent by the local node;
  • the UE After completing the synchronization process with the handover target macro base station, the UE performs data transmission with the handover target macro base station and the local node, respectively.
  • the local node receives configuration information sent by the source macro base station or the handover target macro base station;
  • the local node performs data transmission with the UE and the handover target macro base station respectively by using security parameters configured by the handover target macro base station carried in the configuration information;
  • the local node stops sending data to the UE and stops receiving data sent by the UE, or maintains sending data to the UE and receiving data sent by the UE.
  • a macro base station is provided in the embodiment of the present invention, where the macro base station includes:
  • a first processing module configured to send a handover request to each candidate target macro base station after determining that the handover procedure of the user equipment UE is required, where the handover request carries state information and a location information indicating that the UE is in a bearer separation Describe the local node information where the UE is currently located, and/or bearer information currently being used by the UE on the local node;
  • a second processing module configured to: in the candidate target macro base station that returns a handover request response, select a target macro base station that performs handover for the UE, and send a handover command carried in the handover request response returned by the handover target macro base station to The UE stops transmitting data to the UE and stops receiving data sent by the UE.
  • a first control module configured to perform an admission decision after receiving the handover request sent by the source macro base station, where the handover request carries state information indicating that the UE is in a bearer separation manner;
  • a second control module configured to perform an initial configuration of the UE in the local base station, and return a handover request response to the source macro base station, when the determining that the UE is allowed to accept the UE, and supporting the bearer separation, and the switching
  • the request response carries a bearer separation support acknowledgement message and a handover command for instructing the UE to perform handover.
  • a user equipment where the user equipment includes:
  • a first management module configured to receive a handover command sent by the source macro base station, where the handover command carries a bearer
  • the data is stopped from being sent to the source macro base station, and the data sent by the source macro base station is stopped, and a synchronization process is initiated to the handover target macro base station, where the UE stops sending data to the local node and stops.
  • the second management module is configured to perform data transmission with the handover target macro base station and the local node respectively after completing the synchronization process with the handover target macro base station.
  • a local node is provided in the embodiment of the present invention, where the local node includes:
  • a receiving module configured to receive configuration information sent by the source macro base station or the handover target macro base station;
  • a transmission module configured to perform data transmission with the UE and the handover target macro base station, respectively, by using a security parameter configured by the handover target macro base station carried in the configuration information;
  • the switching module stops transmitting data to the UE and stops receiving data sent by the UE, or maintains sending data to the UE and receiving data sent by the UE.
  • a source macro base station configured to send a handover request to each candidate target macro base station after determining that the handover process of the user equipment UE is required, where the handover request carries state information indicating that the UE is in a bearer separation manner, and The local node information where the UE is currently located, and/or the bearer information currently being used by the UE on the local node; and the target macro base station selected for handover from the UE in the candidate target macro base station that returns the handover request response, will switch And the handover command carried in the handover request response returned by the target macro base station is sent to the UE, and stops sending data to the UE and stops receiving data sent by the UE;
  • a handover target macro base station configured to: after receiving the handover request sent by the source macro base station, perform an admission decision; and when determining that the UE is allowed to accept the UE and supporting the bearer separation, performing the UE in the local base station
  • the bottom layer is configured to return a handover request response to the source macro base station, where the handover request response carries a bearer separation support acknowledgement message and a handover command for instructing the UE to perform handover;
  • the UE is configured to: after receiving the handover command sent by the source macro base station, and carrying the bearer separation support acknowledgement message in the handover command, stop sending data to the source macro base station, and stop receiving data sent by the source macro base station, And initiating a synchronization process to the handover target macro base station, where the UE stops transmitting data to the local node and stops receiving data sent by the local node, or maintains sending data to the local node and receiving data sent by the local node; After completing the synchronization process with the handover target macro base station, performing data transmission with the handover target macro base station and the local node respectively;
  • the local node stops sending data to the UE and stops receiving data sent by the UE, or maintains sending data to the UE and receiving data sent by the UE.
  • the embodiment of the present invention proposes a specific implementation scheme of the UE in the bearer separation state switching from the source macro base station to the target macro base station, and the data processing scheme in the handover process, thereby solving the existing protocol.
  • FIG. 1 is a schematic diagram of a network architecture of an E-UTRAN in the background art
  • FIG. 2 is a schematic structural diagram of a layered network deployment scenario in the background art
  • FIG. 3 is a schematic flowchart of an X2 handover process of an LTE system in the background art
  • FIG. 4 is a schematic diagram of a network architecture of a first type of bearer separation in the background art
  • FIG. 5 is a schematic diagram of a network architecture of a second type of bearer separation in the background art
  • FIG. 6 is a schematic structural diagram of deploying a small cell in an overlapping area of a macro base station in a heterogeneous network in the background;
  • FIG. 7 is a flowchart of a method for performing handover by a source macro base station in a bearer separation scenario according to an embodiment of the present invention.
  • FIG. 8 is a flowchart of a method for a target macro base station to perform handover in a bearer separation scenario according to an embodiment of the present invention
  • FIG. 9 is a flowchart of a method for a UE to perform handover in a bearer separation scenario according to an embodiment of the present invention
  • FIG. 10 is a flowchart of a method for a local node to perform handover in a bearer separation scenario according to an embodiment of the present invention
  • FIG. 11 is an interaction flowchart of a handover process in a first application scenario according to an embodiment of the present invention.
  • FIG. 12 is a flow chart of interaction of a handover process in a second application scenario according to an embodiment of the present invention.
  • FIG. 13 is a flowchart of interaction between devices in the mode 1 according to the embodiment of the present invention.
  • FIG. 14 is a flowchart of interaction between devices in mode 2 according to an embodiment of the present invention.
  • FIG. 15 is a flowchart of interaction between devices in mode A according to an embodiment of the present invention.
  • FIG. 16 is a flowchart of interaction between devices in mode B according to an embodiment of the present invention.
  • FIG. 17 is a schematic structural diagram of a macro base station as a source macro base station according to an embodiment of the present invention.
  • FIG. 18 is a schematic structural diagram of another macro base station as a source macro base station according to an embodiment of the present invention.
  • FIG. 19 is a schematic structural diagram of a macro base station as a handover target base station according to an embodiment of the present invention.
  • 20 is a schematic structural diagram of another macro base station as a handover target base station according to an embodiment of the present invention.
  • FIG. 21 is a schematic structural diagram of a user equipment according to an embodiment of the present invention.
  • FIG. 22 is a schematic structural diagram of another user equipment according to an embodiment of the present invention.
  • FIG. 23 is a schematic structural diagram of a local node according to an embodiment of the present invention.
  • FIG. 24 is a schematic structural diagram of another local node according to an embodiment of the present invention.
  • FIG. 25 is a schematic structural diagram of a communication system according to an embodiment of the present invention.
  • the embodiments of the present invention provide a specific implementation scheme for a UE in a bearer separation state to switch from a source macro base station to a target macro base station, and a data transmission processing scheme during the handover process, thereby solving the present problem.
  • the protocol there is no specific implementation scheme for the UE to switch between the macro base stations in the bearer separation scenario and a problem of the data transmission processing scheme during the handover process.
  • the method for performing handover in a bearer separation scenario according to an embodiment of the present invention for a source macro base station includes the following steps:
  • Step 71 After determining that the UE needs to perform the handover process, the source macro base station sends a handover request to each candidate target macro base station, where the handover request carries state information indicating that the UE is in the bearer separation, and the local location where the UE is currently located. Node information, and/or bearer information currently being used by the UE on the local node;
  • the source macro base station may carry the bearer information (such as the data radio bearer) currently carried by the UE on the local node in the access stratum configuration (AS-Config) information in the handover preparation information included in the handover request.
  • Bearer, DRB) L2 configuration information may also carry the current eNB ID, Cell ID, and/or radio resource configuration of a local node (such as a Small Cell under the Local eNB) participating in the bearer separation service transmission. And other information.
  • the source macro base station carries the same physical cell identifier in the access layer context (AS-Context) information in the handover preparation information (Physical Cell)
  • AS-Context access layer context
  • PCI Physical Cell
  • AS-Context access layer context
  • PCI Physical Cell
  • Step 72 The source macro base station selects, from the candidate target macro base station that returns the handover request response, the target macro base station that performs handover for the UE, and receives the bearer bearer separation support confirmation message returned by the handover target macro base station, and is used to indicate that the UE performs the handover.
  • the handover command of the handover sends a handover command carried in the handover request response returned by the handover target macro base station to the UE, and stops transmitting data to the UE and stops receiving data transmitted by the UE.
  • the source macro base station sends the handover command returned by the handover target macro base station to the UE by using an RRC connection reconfiguration message, where the handover command carries a bearer separation support acknowledgement message.
  • step 72 if the source macro base station receives only the handover request response returned by the candidate target macro base station, the candidate target macro base station is selected as the target macro base station for handover;
  • the source macro base station receives the handover request response returned by the at least two candidate target macro base stations, selecting one of the at least two candidate target macro base stations as the handover target macro base station.
  • the handover request response returned by the handover target macro base station carries configuration information of the bearer of the handover target macro base station for the UE currently on the handover target macro base station, configuration information of the bearer separated to the local node, and bears the bearer separation.
  • Radio link configuration information and/or serving cell configuration information of the local node of the service transmission, etc., source Acer After the station receives the handover request response returned by the handover target macro base station, the method further includes:
  • the source macro base station sends the configuration information of the bearer currently carried by the UE on the local node and the configuration information of the radio link of the local node and/or the serving cell configuration information to the local node, respectively, of the handover target macro base station carried in the handover request response. .
  • the handover request response returned by the handover target macro base station carries the security parameter configured by the handover target macro base station
  • the source macro base station also sends the security parameter configured by the handover target macro base station carried in the handover request response to the local node, so that the local node Data transmission is performed using the security parameters configured by the handover target macro base station.
  • the handover command further carries a security parameter configured by the handover target macro base station, so that the UE uses the security parameters configured by the handover target macro base station to perform data transmission.
  • step 72 the method further includes:
  • the source macro base station After receiving the UE context release indication sent by the handover target macro base station, the source macro base station releases the resources related to the UE, thereby completing the handover process.
  • the method further includes:
  • the source macro base station determines that the UE stops transmitting data to the local node and stops receiving data sent by the local node after receiving the handover command, and sends the first notification information to the local node to notify the local node to stop sending data to the UE and stop receiving. The data sent by the UE.
  • the source macro base station and the UE agree whether the UE stops transmitting data to the local node and stops receiving data sent by the local node after receiving the handover command; or the source macro base station notifies the UE and the local node whether to stop the UE and the local node.
  • the source macro base station determines that the UE stops transmitting data to the local node and stops receiving data sent by the local node after receiving the handover command.
  • the UE before the handover, works on the source macro base station and the local node at the same time, and uses the security parameters configured by the source macro base station to perform data transmission with the source macro base station and the local node respectively;
  • the UE After the macro base station selects the handover target macro base station, the UE simultaneously works on the handover target macro base station and the local node, and performs data transmission with the handover target macro base station and the local node respectively by using the security parameters configured by the handover target macro base station;
  • the local node uses the security parameters configured by the source macro base station to perform data transmission with the source macro base station and the UE respectively; after the UE successfully switches to the handover target macro base station selected by the source macro base station, the local node uses the handover target macro base.
  • the security parameters of the station configuration are respectively transmitted with the handover target macro base station and the UE.
  • the method for performing handover in the bearer separation scenario in the embodiment of the present invention includes the following steps:
  • Step 81 After receiving the handover request sent by the source macro base station, the candidate macro base station performs an admission decision, where the handover request carries state information indicating that the UE is in the bearer separation.
  • the handover request sent by the source macro base station carries state information indicating that the UE is in bearer separation and local node information where the UE is currently located, and/or bearer information that the UE is currently on the local node.
  • the candidate target macro base station refers to the handover request sent by the source macro base station, according to the quality of service (QoS), current interference, and load status of the bearer to be received (ie, the bearer currently on the source macro base station) And other information to accept the judgment.
  • QoS quality of service
  • current interference current interference
  • load status of the bearer to be received ie, the bearer currently on the source macro base station
  • Step 82 The candidate target macro base station performs the base camp configuration of the UE in the base station when determining that it is allowed to accept the UE and supports the bearer separation, and returns a handover request response to the source macro base station, where the handover request response is carried.
  • the handover command carries a security parameter configured by the candidate target macro base station.
  • the candidate target macro base station learns that the UE is in the bearer separation state and the local node information where the UE is currently located according to the handover request sent by the source macro base station, and/or the UE is currently on the local node.
  • the candidate macro base station determines whether it can support bearer separation and whether it needs to update the separated bearer (for example, the candidate target macro base station determines whether to adjust the number of bearers on the local node, Or updating the configuration information of the bearer separated on the local node, etc.);
  • the bearer separation support acknowledgement message is carried in the handover request response returned to the source macro base station.
  • the bottom layer configuration of the UE in the base station by the candidate target macro base station includes: RLC configuration information, MAC configuration information, and proprietary physical layer configuration information (including PDSCH (Physical Downlink Shared Channel) Link Shared Channel) Proprietary Configuration / PUCCH (Physical Uplink Control CHannel) Proprietary Configuration / PUSCH (Physical Uplink Shared Channel) Proprietary Configuration / Uplink Power Control Proprietary Configuration, etc.), RACH (Random Access Channel) proprietary configuration information, etc.
  • RLC configuration information Physical Downlink Shared Channel
  • PUCCH Physical Uplink Control CHannel
  • PUSCH Physical Uplink Shared Channel
  • RACH Random Access Channel
  • the handover command of the candidate target macro base station returning the handover request response to the source macro base station carries the configuration information of the bearer (such as the SRB and the corresponding DRB) that the base station currently has on the base station, Separating the configuration information of the bearer of the local node and the radio link configuration information and/or the serving cell configuration information of the local node that bears the bearer separation service transmission.
  • the bearer such as the SRB and the corresponding DRB
  • the candidate target macro base station may reselect a local node handover cell for the UE according to the admission measurement decision.
  • the candidate target macro base station selects another local node to switch the cell, sends a handover admission request to the updated local node, where the request message includes the UE identifier, the bearer configuration information of the UE at the original local node, and the radio resource configuration information, the target astrology.
  • the station adjusts the bearer configuration information transmitted at the local node.
  • the updated local node performs the admission decision and the handover admission request message feedback according to the request information of the target macro base station, where the feedback information includes the UE identifier, the bearer configuration information that the UE receives at the local node, and the radio resource configuration information. Then, the target macro base station notifies the base station with the bearer configuration information, the radio resource configuration information, and the updated local node information of the separated bearer, the bearer configuration information separated on the updated local node, the radio resource configuration information, and the like. Give the source base station. The source base station may notify the original local node of the handover request feedback information notified by the target macro base station. And then carried in the original The data of the unacknowledged or transmitted bearer of the ground node is forwarded from the original local node or the source base station to the target macro base station and/or the updated local node.
  • the handover target macro base station determines that it is allowed to accept the UE, and before returning the handover request response to the source macro base station, The method also includes:
  • the handover target macro base station establishes a dedicated bearer connection with the local node or the updated local node, and uses the dedicated bearer connection to respectively configure the base station with the configuration information of the bearer currently on the local node of the UE and the configuration information of the wireless link of the local node. And/or the serving cell configuration information is sent to the local node.
  • the handover target macro base station further informs the updated local node of the original local node information, including the original local node identifier, the bearer configuration information on the original local node, and the radio resource configuration information of the original local node. Wait.
  • the updated local node will then establish a dedicated bearer connection with the original local node, receive user data forwarded from the original local node, or receive user data obtained by the handover target macro base station from the source base station or forwarded by the original local node.
  • the source base station acquires the local node change indication notified from the handover target macro base station, and notifies the local node of the original local node user that the local node changes, and the original local node stops the data transmission and processing process with the user. .
  • the handover target macro base station further sends the security parameter configured by the base station to the local node by using the dedicated bearer connection, so that the local node performs data transmission by using the security parameter configured by the handover target macro base station.
  • the method further includes:
  • the handover target macro base station sends uplink resource allocation and timing synchronization information to the UE;
  • the handover target macro base station After receiving the handover complete message returned by the UE, the handover target macro base station performs uplink/downlink transmission of data with the UE, and sends a path conversion request to the core network (CN);
  • CN core network
  • the handover target macro base station After receiving the path conversion request response returned by the core network, the handover target macro base station sends a UE context release indication to the source macro base station, so that the source macro base station releases the corresponding resource, thereby completing the handover process.
  • the method further includes:
  • the handover target macro base station After receiving the transmission recovery request sent by the UE, the handover target macro base station sends the first indication information to the local node to instruct the local node to resume sending data to the UE and receive data sent by the UE.
  • the method for performing handover in the bearer separation scenario in the embodiment of the present invention includes the following steps:
  • Step 91 After receiving the handover command sent by the source macro base station, and the UE carries the bearer separation support acknowledgement message, the UE stops sending data to the source macro base station and stops receiving data sent by the source macro base station, and switches to The target macro base station initiates a synchronization process, in which the UE stops transmitting data to the local node and stops receiving data sent by the local node, or maintains sending data to the local node and receiving data sent by the local node;
  • Step 92 After completing the synchronization process with the handover target macro base station, the UE performs data transmission with the handover target macro base station and the local node, respectively.
  • the synchronization process between the UE and the handover target macro base station includes:
  • the UE After completing the downlink synchronization, the UE initiates a random access (RA) process to the handover target macro base station; after receiving the preamble sequence, the handover target macro base station returns a RACH response message to the UE, where the RACH response is received.
  • the message carries information such as the TA value adjusted by the base station;
  • the UE returns a handover complete message (ie, an RRC reconfiguration complete message) to the handover target macro base station, and confirms that the handover is successful.
  • the handover target macro base station After receiving the handover complete message, the handover target macro base station returns an RLC ACK message to the UE, and starts to perform downlink data.
  • Sending, and sending a path conversion request to the core network after receiving the path conversion request returned by the core network, notifying the source macro base station to release the bearer related to the UE and the context of the UE;
  • the UE After receiving the ACK message, the UE starts data transmission on the handover target macro base station. At this time, the UE works on the handover target macro base station and the local node in the bearer separation state.
  • the source macro base station forwards the data of the UE that has not been acknowledged or newly received to the handover target macro base station.
  • step 91 when the UE stops transmitting data to the source macro base station and stops receiving data sent by the source macro base station, the UE performs the following two methods for data transmission between itself and the local node:
  • Manner 1 The UE stops sending data to the local node and stops receiving data sent by the local node. After the UE resynchronizes with the local node successfully, it resumes sending data to the local node and receiving data sent by the local node.
  • the method also includes:
  • the source macro base station determines that the UE stops sending data to the local node after receiving the handover command, stops receiving data sent by the local node, and sends a first notification to the local node.
  • Information to notify the local node to stop sending data to the UE and stop receiving data sent by the UE.
  • the method further includes:
  • the UE initiates a synchronization process to the local node, where the UE performs security data transmission using the security parameters configured by the target macro base station during synchronization with the local node;
  • the UE sends a transmission recovery request to the handover target macro base station.
  • the handover target macro base station sends the first indication information to the local node, to indicate that the local node resumes transmitting data to the UE and receives the UE to send.
  • the data is transmitted; thus, the data transmission between the UE and the local node is restored.
  • the data transmission between the UE and the local node uses the security parameters configured by the handover target macro base station. If the UE fails to synchronize with the local node, the UE sends a fifth notification information indicating that the local node fails to synchronize to the handover target macro base station.
  • the UE learns that the local node changes in the handover command, or directly stops the data transmission between the source macro base station and the original local node after receiving the handover command, and the UE and the target macro base station and the update
  • the local node performs the synchronization process. Further, after the synchronization between the UE and the updated local node is completed, the UE or the updated local node notifies that the target macro base station user and the local node are synchronized, and subsequent data transmission can be performed.
  • Manner 2 The UE maintains sending data to the local node and receives data sent by the local node.
  • the method further includes:
  • the UE decodes the data sent by the local node by using the security parameters configured by the source macro base station and the security parameters configured by the handover target macro base station;
  • the UE After successfully decoding the security parameters configured by the handover target macro base station, the UE aborts the security parameters configured by the source macro base station for decoding.
  • the local node does not change before and after the macro base station is switched, and the data transmission of the UE on the local node is not suspended.
  • the handover command carries a command to indicate that the local node does not forward the UE to the local node. Information about the data.
  • the data of the UE in the bearer separation state can always maintain the transmission state, thereby reducing the data interruption delay and significantly improving the user experience of transmitting high-speed data in the heterogeneous network.
  • a method for performing handover in a bearer separation scenario includes the following steps:
  • Step 101 The local node receives configuration information sent by the source macro base station or the handover target macro base station.
  • the configuration information includes at least configuration information of the handover target macro base station for the UE currently carrying the local node, configuration information of the wireless link of the local node, and security parameters configured by the handover target macro base station;
  • Step 102 The local node uses the security parameters configured by the handover target macro base station to perform data transmission with the UE and the handover target macro base station respectively. In the handover process, the local node stops sending data to the UE and stops receiving data sent by the UE. Or maintaining transmission of data to the UE and receiving data transmitted by the UE.
  • the method further includes:
  • the local node After receiving the first notification information sent by the source macro base station or the second notification information sent by the UE, the local node stops sending data to the UE and stops receiving data sent by the UE;
  • the local node After receiving the first indication information sent by the handover target macro base station, the local node resumes transmitting data to the UE and receiving data sent by the UE.
  • Local base station Local eNB
  • low power Pico
  • home Femto
  • Remote Radio Heads RRH
  • relay relay
  • RN relay device
  • Embodiment 1 the UE switches from the source macro eNB to the target macro eNB, and after receiving the handover command sent by the source macro base station, the UE stops sending data to the local node (Small Cell in this embodiment). The data sent by the local node is stopped.
  • the interaction between the source macro eNB, the target macro eNB, the UE, and the Small Cell in this embodiment is as follows:
  • Step 1101 The source macro eNB performs measurement control on the UE, and is implemented in an RRC connection reconfiguration (Connection Reconfiguration): ⁇ S S IE (Measure Configuraion IE) implementation;
  • Step 1102 The UE reports the measurement result to the source macro eNB.
  • Step 1103 The source macro eNB performs a handover decision according to the measurement result reported by the UE.
  • Step 1104 After determining that the handover process of the UE needs to be performed, the source macro eNB sends a handover request to the target macro eNB.
  • Step 1105 The target macro eNB performs admission control.
  • Step 1105a The target macro eNB initiates a dedicated bearer process to the Small Cell.
  • Step 1105b The Small Cell returns a dedicated bearer setup response to the target macro eNB.
  • Step 1106 After determining that the UE is allowed to access the UE and supports the bearer separation, the target macro eNB sends a handover request response to the source macro eNB.
  • the handover request response carries a bearer separation support acknowledgement message and a handover for instructing the UE to perform handover.
  • Step 1107 The source macro eNB sends a handover command to the UE.
  • the UE stops sending data to the source macro eNB and the Small Cell and stops receiving data sent by the source macro eNB and the Small Cell;
  • Step 1107a The source macro eNB notifies the Small Cell to stop the old bearer data transmission, that is, stops sending data to the UE and stops receiving data sent by the UE;
  • Step 1108 After receiving the handover command, the UE initiates a synchronization process with the target macro eNB.
  • the UE triggers a synchronization process between itself and the Small Cell (in the process, the UE uses the security parameters configured by the standard macro eNB for data transmission);
  • Step 1109 The target macro eNB sends uplink resource allocation and timing synchronization information to the UE.
  • Step 1110 The UE returns a handover complete message to the target macro eNB to determine that the handover is successful.
  • the UE will work on the Small Cell and the target macro eNB simultaneously in the bearer separation state;
  • Step 1111 The target macro eNB sends a path conversion request to the core network (CN).
  • Step 1112 The CN performs downlink data path conversion.
  • Step 1113 The CN returns a path conversion request response to the target macro eNB.
  • Step 1114 The target macro eNB sends a UE context release indication to the source macro eNB.
  • Step 1115 The source macro eNB starts to release the corresponding resource.
  • Embodiment 2 the UE is handed over from the source macro eNB to the target macro eNB, and after receiving the handover command sent by the source macro base station (Macro eNB), the UE maintains the local node (Small Cell in this embodiment). The data is transmitted and the data sent by the local node is received.
  • the interaction between the source macro eNB, the target macro eNB, the UE, and the Small Cell in this embodiment is as follows:
  • Step 1201 The source macro eNB performs measurement control on the UE.
  • Step 1202 The UE reports the measurement result to the source macro eNB.
  • Step 1203 The source macro eNB performs a handover decision according to the measurement result reported by the UE.
  • Step 1204 After determining that the UE handover process is required, the source macro eNB sends a handover request to the target macro eNB.
  • Step 1205 The target macro eNB performs admission control.
  • Step 1205a The target macro eNB initiates a dedicated bearer process to the Small Cell.
  • Step 1205b The Small Cell returns a dedicated bearer setup response to the target macro eNB.
  • Step 1206 After determining that the UE is allowed to access the UE and supporting the bearer separation, the target macro eNB sends a handover request response to the source macro eNB.
  • the handover request response carries a bearer separation support acknowledgement message and a handover for instructing the UE to perform handover.
  • Step 1207 The source macro eNB sends a handover command to the UE.
  • the UE stops sending data to the source macro eNB and stops receiving data sent by the source macro eNB, and continues to maintain data transmission to the Small Cell and receive data sent by the Small Cell;
  • Step 1208 After receiving the handover command, the UE initiates a synchronization process with the target macro eNB.
  • Step 1209 The target macro eNB sends uplink resource allocation and timing synchronization information to the UE.
  • Step 1210 The UE returns a handover complete message to the target macro eNB to determine that the handover is successful.
  • the UE will work on the Small Cell and the target macro eNB simultaneously in the bearer separation state;
  • Step 1211 The target macro eNB sends a path conversion request to the core network (CN).
  • Step 1212 The CN performs downlink data path conversion.
  • Step 1213 The CN returns a path conversion request response to the target macro eNB.
  • Step 1214 The target macro eNB sends a UE context release indication to the source macro eNB.
  • Step 1215 The source macro eNB starts to release the corresponding resource.
  • the data transmission between the UE and the local node is maintained during the handover process. Therefore, the UE needs to save the security parameters configured by the source macro base station and the security parameters configured by the target macro base station, and use the two sets of security parameters. Decoding is performed separately until the PDCP packet using the new security parameter (ie, the security parameter configured by the target macro base station) is solved, and then only the new security parameter is used for decoding.
  • the Small Cell after receiving the end identifier, the Small Cell encrypts the data sent to the UE by using only the new security parameters, that is, the step of "switching the user identifier to the new encrypted data of the uplink and the downlink".
  • an abnormal situation may occur, which mainly includes the following two types:
  • the first abnormal situation the network side handover fails (that is, the synchronization between the UE and the handover target macro base station fails);
  • the second abnormal situation the network side handover succeeds, but the local node synchronization fails (that is, the UE fails to synchronize with the local node);
  • the application scenario of the abnormal situation is: after receiving the handover command sent by the source macro base station, the UE stops sending data to the local node and stops receiving data sent by the local node;
  • the determination of the first abnormal situation includes the following two methods:
  • the source macro base station determines whether the network side handover fails, and specifically includes:
  • the source macro base station starts the first timer after receiving the handover request response returned by each candidate target macro base station or selecting the handover target macro base station for the UE;
  • the source macro base station has not received the UE context release indication sent by the handover target macro base station when the first timer expires, it is determined that the network side handover fails;
  • the source macro base station sends second notification information to the local node, to instruct the local node to perform corresponding processing according to the second notification information;
  • the source macro base station sends, to the UE, third notification information indicating that the UE network side handover fails, to indicate that the UE performs a re-establishment process after receiving the third notification information, where the target macro base station and the handover failure target base are reconstructed.
  • the station is the same base station.
  • the local node determines that the network side handover fails, and performs corresponding processing according to the second notification information; specifically, the following two situations are met: a case: the second notification information is to indicate that the local node stops sending data to the UE and stops receiving data sent by the UE;
  • the local node performs: stopping sending data to the UE and stopping receiving data sent by the UE, and releasing a bearer configuration related to the UE;
  • the local node After receiving the second notification information, the local node performs: buffering data that is related to the UE and is not processed or sent.
  • the UE after receiving the handover command sent by the source macro base station, the UE maintains sending data to the local node and receiving data sent by the local node; after receiving the second notification information, the local node further performs: notifying the UE to stop Send data to the node and stop receiving data sent by the node.
  • the second case the second notification information is to indicate that the network side handover fails
  • the local node performs: maintaining data transmission to the UE and receiving data sent by the UE, and starting a fourth timer; and when the fourth timer expires, the indication of the reestablishment target macro base station has not been received, stopping Transmitting data to the UE and stopping receiving data transmitted by the UE, and releasing resource configuration related to the UE.
  • the local node performs: forwarding the data to be transmitted between itself and the UE to the reconstruction target abase station; If the local node initiates a bearer separation procedure to the local node before the fourth timer expires, the local node performs: updating its own resource configuration, and completing the bearer separation from the reestablishment target macro base station. After the process, the data is sent to the UE and the data sent by the UE is received.
  • duration of the fourth timer may be configured by the local node or by the source macro base station; in addition, the activation of the fourth timer may also be triggered by the source macro base station.
  • the UE determines that the network side handover fails, and initiates a reconstruction process to the reconstruction target macro base station.
  • the UE suspends a bearer other than SRB0 and not separated from the local node, and performs a cell selection process during the reestablishment process with the reestablishment target macro base station;
  • the UE performs data transmission with the reconstructed target macro base station and the local node respectively; if the reconstruction process fails, the UE stops transmitting data to the local node and stops receiving data sent by the local node, releasing itself and the reconstruction target macro base station.
  • the RRC is connected and enters the idle (RRC_IDLE) state.
  • the UE when determining that the re-establishment process fails, the UE further performs: sending, to the local node, fourth notification information indicating that the local node re-establishment process fails.
  • the UE starts the T311 timer.
  • the UE suspends the bearer that is not separated from the local node except SRB0, and performs a cell selection process. After the UE selects a suitable reestablished cell (such as a TD-LTE cell), the UE stops the T311 timer and starts T301. a timer, sending an RRC Connection Reestablishment Request message to the reestablishment target macro base station;
  • a suitable reestablished cell such as a TD-LTE cell
  • the UE After receiving the RRC Connection Reestablishment message returned by the reestablishment target macro base station, the UE stops the T301 timer;
  • the UE establishes a PDCP entity and an RLC entity corresponding to the SRB1 on the reconstructed cell, restores the transmission of the SRB1, and sends an RRC Connection Reestablishment Complete message to the reconstruction target macro base station, thereby completing the reconstruction process with the reconstruction target macro base station; At the same time, the UE operates on the local node and the reestablishment target macro base station (ie, the target macro base station that failed the original handover) in the bearer separation state.
  • the reconstruction target macro base station performs separate RB and configuration adjustment after completing the reconstruction process, and updates the used security parameters.
  • the UE does not select a suitable re-established cell when the T311 timer expires, it is determined that the re-establishment process fails;
  • the UE When the T301 timer expires, the UE does not receive the RRC connection re-establishment message returned by the reestablishment target macro base station, and determines that the re-establishment process fails; or
  • the UE receives the RRC connection reestablishment sent by the reestablishment target macro base station (RRC Connection Reestablishment) Reject) The message determines that the rebuild process failed.
  • RRC Connection Reestablishment target macro base station
  • the UE releases its own RRC connection and enters the RRC_IDLE state.
  • the interaction between the UE, the source Macro eNB, the local node, and the target Macro eNB in the mode 1 is described in detail below with reference to the specific embodiment shown in FIG. 13.
  • the UE switches from the source Macro eNB to the logo Macro. eNB, the interaction process is as follows:
  • Step 131 The UE sends a measurement result to the source Macro eNB.
  • Step 132 The source Macro eNB performs handover determination according to the measurement result reported by the UE.
  • Step 133 The source Macro eNB sends a handover request to the target Macro eNB when determining that the handover needs to be performed.
  • Step 134 After receiving the handover request response returned by the target Macro eNB, the source Macro eNB starts the configured timer T1 to Determine whether the network side handover fails;
  • Step 135 The source Macro eNB sends a handover command to the UE.
  • Step 136 If the source Macro eNB has not received the UE context release indication sent by the target Macro eNB when the timer T1 times out, determining that the network side handover fails;
  • Step 137 The source Macro eNB notifies the local node that the network side handover fails, and instructs the local node to perform the handover failure processing.
  • Step 138 The local node performs a handover failure process, such as: stopping sending data to the UE and stopping receiving data sent by the UE; buffering data that is related to the UE and is not processed or sent, so that the UE continues to transmit after the reestablishment; For example, maintaining data transmission to the UE and receiving data sent by the UE, starting the configured timer T2, if the indication of the reestablishment target macro base station is not received when the timer T2 times out, stopping sending data to the UE and stopping Receiving data sent by the UE; and so on.
  • a handover failure process such as: stopping sending data to the UE and stopping receiving data sent by the UE; buffering data that is related to the UE and is not processed or sent, so that the UE continues to transmit after the reestablishment; For example, maintaining data transmission to the UE and receiving data sent by the UE, starting the configured timer T2, if the indication of the reestablishment target macro base station is not received when
  • Manner 2 The UE determines whether the network side handover fails, including:
  • the UE After determining that the random access RA with the handover target macro base station fails, the UE determines that the network side handover fails, and initiates a reconstruction process to the reconstruction target macro base station; or
  • the UE When the UE initiates the synchronization process to the handover target macro base station, the UE starts the configured third timer (such as the T304 timer), and if the third timer expires, the feedback information of the handover target macro base station is not received, and the network is determined.
  • the side handover fails, and the reconstruction process is initiated to the reconstruction target macro base station;
  • the reestablishment target macro base station and the target macro base station that fails handover are the same base station.
  • the UE determines that the network side handover fails. And performing: sending, to the local node, first notification information indicating that the local node network side handover fails;
  • the local node stops sending data to the UE and stops receiving data sent by the UE, the local node releases the bearer configuration related to the UE after receiving the first notification information; Further, after receiving the first notification information, the local node caches data that is related to the UE and is not processed or sent, so that the UE continues to transmit after the reestablishment.
  • the UE stops transmitting data to the source macro base station and stops receiving data transmitted by the source macro base station after receiving the handover command sent by the source macro base station, and maintains sending data to the local node and receiving data sent by the local node
  • the UE After determining that the network side handover fails, the UE further performs: stopping sending data to the local node and stopping receiving data sent by the local node, and sending, to the local node, first notification information indicating that the local node network side handover fails;
  • the local node stops sending data to the UE and stops receiving data sent by the UE after receiving the first notification information. And releasing the bearer configuration related to the UE;
  • the local node caches data that is related to the UE and is not processed or sent, so that the UE continues to transmit after the reconstruction.
  • the UE After determining that the network side fails to be handed over, the UE initiates a re-establishment process to the reestablishment target macro base station, and the process of the local node is described in the description of the method, and details are not described herein again.
  • the UE, the source Macro eNB, the local node, and the target in the mode 2 are combined with the specific embodiment shown in FIG.
  • the UE switches from the source Macro eNB to the target Macro eNB.
  • the interaction process is as follows:
  • Step 141 The source Macro eNB sends a handover command to the UE.
  • Step 142 After receiving the handover command, the UE initiates a random access procedure to the target Macro eNB.
  • Step 144 The UE notifies the local node that the network side handover fails.
  • Step 145 The local node performs network side handover failure processing; for example, stopping sending data to the UE and stopping receiving data sent by the UE; releasing a bearer configuration corresponding to the UE; buffering is related to the UE and is not processed or sent. Data;
  • Step 146 the UE initiates a reestablishment request to the reestablishment target Macro eNB.
  • the process refer to the related description in the first method, and details are not described herein again.
  • the second abnormal situation is determined by the following two methods:
  • Mode A The UE determines whether the synchronization between the local node and the local node fails, and specifically includes:
  • the UE After completing the synchronization process with the handover target macro base station, the UE initiates a synchronization process to the local node; if the synchronization with the local node is successful, the UE sends a transmission recovery request to the handover target macro base station;
  • the UE sends a fifth notification information indicating that the local node fails to synchronize to the handover target macro base station.
  • the handover target macro base station if the handover target macro base station receives the transmission recovery request returned by the UE, the handover target macro base station performs The first indication information is sent to the local node, to indicate that the local node resumes transmitting data to the UE and receives data sent by the UE;
  • the handover target macro base station receives the fifth notification information returned by the UE, performing: reselecting the local node that is separated by the bearer, and after the target macro base station selects another local node to switch the cell, sending a handover admission request to the updated local node, where
  • the request message includes a UE identifier, bearer configuration information of the UE at the original local node, and radio resource configuration information, and the target macro base station adjusts bearer configuration information transmitted at the local node, and the handover target macro base station also notifies the updated local node of the original local node information.
  • the original local node identifier, the bearer configuration information on the original local node, and the radio resource configuration information of the original local node are included.
  • the updated local node performs the admission decision and the handover admission request message feedback according to the request information of the target macro base station, where the feedback information includes the UE identifier, the bearer configuration information received by the UE at the local node, and the radio resource configuration information. Then, the target macro base station passes the bearer configuration information, the radio resource configuration information, the updated local node information of the separated bearer, the bearer configuration information on the local node, the radio resource configuration information, etc.
  • the notification information is sent to the source macro base station, to indicate that the source macro base station notifies the synchronization failure that the local node releases the bearer configuration related to the UE, and the local node that fails the notification synchronization sends the data related to the UE that is buffered by itself to the handover target macro base station. Or reselecting the local node that bears the separation, and notifying the local node that failed the synchronization to release the bearer configuration related to the UE and the local node notifying the synchronization failure to send the data related to the UE that is cached by itself to the base station.
  • the updated local node will then establish a dedicated bearer connection with the original local node, receive user data forwarded from the original local node, or receive user data obtained by the handover target macro base station from the source base station or forwarded by the original local node.
  • the interaction between the UE, the source Macro eNB, the local node, and the target Macro eNB in the mode A is described in detail below with reference to the specific embodiment shown in FIG. 15.
  • the UE switches from the source Macro eNB to the logo Macro. eNB, the interaction process is as follows:
  • Step 151 The source Macro eNB sends a handover command to the UE.
  • Step 152 After receiving the handover command, the UE initiates a random access procedure to the target Macro eNB. After receiving the handover command, the UE stops data transmission between the local node and the source Macro eNB.
  • Step 153 After completing the handover process with the target Macro eNB, the UE initiates an access procedure to the local node.
  • Step 155 The UE notifies the target Macro eNB that the local node fails to access the local node.
  • Step 156 The target Macro eNB notifies the local node to perform an access failure process; for example, stopping sending data to the UE and stopping receiving data sent by the UE; releasing a bearer configuration corresponding to the UE; and buffering data related to the UE Sent to the target Macro eNB; etc;
  • Step 157 The target Macro eNB performs resource reselection, that is, reselects the local node mode B for taking the bearer separation, and the local node determines whether the synchronization between the UE and the UE fails.
  • the local node After receiving the notification sent by the source macro base station to indicate that the second timer is started, the local node starts the second timer (such as timer T3, and the duration of the T3 may be configured by the source macro base station or configured by the local node);
  • the second timer expires, if the local node does not complete the synchronization process with the UE or the channel quality of the UE is not restored, it is determined that the synchronization with the UE fails;
  • the local node notifies the handover target macro base station that the local node fails to synchronize with the UE.
  • the handover target macro base station reselects the local node that is separated by the bearer, and notifies the local node to release the bearer configuration related to the UE and notify the local node that The self-cached UE-related data is sent to the base station.
  • the UE switches from the source Macro eNB to the target Macro eNB.
  • the interaction process is as follows:
  • Step 161 The source Macro eNB sends a handover command to the UE.
  • Step 162 After receiving the handover command, the UE initiates a random access procedure to the target macro eNB. After receiving the handover command, the UE stops data transmission between the local node and the source macro eNB.
  • Step 163 After completing the handover process with the target Macro eNB, the UE initiates an access procedure to the local node.
  • Step 164 The local node determines that the access between the UE and the UE fails.
  • Step 165 The local node notifies the target Macro eNB that the access with the UE itself fails.
  • Step 166 The target Macro eNB notifies the local node to perform an access failure process; for example, stopping sending data to the UE and stopping receiving data sent by the UE; releasing a bearer configuration corresponding to the UE; and buffering the UE related to the UE Data is sent to the target Macro eNB;
  • Step 167 The target Macro eNB performs resource reselection, that is, reselects a local section for undertaking the bearer separation.
  • the foregoing process may be implemented by a software program, where the software program may be stored in a storage medium, when the stored software program is invoked.
  • the embodiment of the present invention further provides a macro base station, including: a first processing module 171, configured to: after determining that a handover process of the UE is required, to each candidate target macro base station Sending a handover request, where the handover request carries state information indicating that the UE is in a bearer separation, and local node information where the UE is currently located, and/or bearer information that the UE is currently on the local node;
  • a first processing module 171 configured to: after determining that a handover process of the UE is required, to each candidate target macro base station Sending a handover request, where the handover request carries state information indicating that the UE is in a bearer separation, and local node information where the UE is currently located, and/or bearer information that the UE is currently on the local node;
  • the second processing module 172 is configured to: in the candidate target macro base station that returns the handover request response, select the target macro base station that performs handover for the UE, and send the handover command carried in the handover request response returned by the handover target macro base station to The UE stops transmitting data to the UE and stops receiving data transmitted by the UE.
  • the second processing module 172 is further configured to:
  • the handover target macro base station carried in the handover request response is respectively directed to the bearer currently carried by the UE on the local node.
  • the configuration information and the configuration information of the wireless link of the local node and/or the serving cell configuration information are sent to the local node.
  • the second processing module 172 is specifically configured to:
  • the first notification information is sent to the local node to notify the local node to stop sending data to the UE and stop receiving the UE.
  • the data is sent to the local node to notify the local node to stop sending data to the UE and stop receiving the UE.
  • the second processing module 172 is further configured to:
  • the handover request response returned by the candidate target macro base station or selecting the handover target macro base station After receiving the handover request response returned by the candidate target macro base station or selecting the handover target macro base station, starting the first timer; when the first timer expires, if the UE context sent by the handover target macro base station has not been received yet Deleting the indication, determining that the network side handover fails; sending the second notification information to the local node to instruct the local node to perform corresponding processing according to the second notification information; and sending, to the UE, third notification information indicating that the UE network side handover fails, to Instructing the UE to perform a re-establishment process after receiving the third notification information;
  • the second notification information indicates that the local node stops sending data to the UE and stops receiving data sent by the UE, or the second notification information indicates that the network side handover fails; the reconstruction target macro base station is the same as the target macro base station that fails handover. Base station.
  • the second processing module 172 is further configured to:
  • the fourth notification information is sent to the local node to notify the local node to start to determine whether the node and the UE are successfully synchronized.
  • the second timer After determining that the UE stops transmitting data to the local node and stops receiving the data sent by the local node, after receiving the handover command, the fourth notification information is sent to the local node to notify the local node to start to determine whether the node and the UE are successfully synchronized. The second timer.
  • the embodiment of the present invention further provides a macro base station, as shown in FIG. 18, including a processor 181 and a data transceiving interface 182, where:
  • the processor is configured to: after determining that the handover process of the UE is required, send a handover request to each candidate target macro base station, where the handover request carries status information indicating that the UE is in bearer separation and the current UE Local node information, and/or bearer information currently being used by the UE on the local node; from the candidate target macro base station that returns the handover request response, the target macro base station that performs handover is selected for the UE, and the handover target macro base station is returned
  • the handover command carried in the handover request response is sent to the UE, and stops sending data to the UE and stops receiving data sent by the UE;
  • the data transceiving interface transmits and receives data under the control of the processor.
  • an embodiment of the present invention further provides another macro base station, including: a first control module 191, configured to perform an admission decision after receiving a handover request sent by a source macro base station,
  • the handover request carries state information indicating that the UE is in a bearer separation.
  • the second control module 192 is configured to: when determining that the UE is allowed to receive the UE, and support the bearer separation, perform the bottom layer configuration of the UE in the base station, and return a handover request response to the source macro base station, where the handover request response carries the bearer separation support. An acknowledgement message and a handover command for instructing the UE to perform handover. Further, if it is the handover target macro base station selected by the source macro base station, the second control module 192 is specifically configured to: after determining that the UE is allowed to accept the UE, and before returning the handover request response to the source macro base station, establish a dedicated with the local node. The bearer connection is sent to the local node by using the dedicated bearer connection to configure the base station with the configuration information of the bearer currently on the local node and the configuration information of the radio link of the local node and/or the serving cell configuration information.
  • control module 192 is further configured to:
  • the second control module 192 is specifically configured to:
  • corresponding processing is performed according to the state information for indicating that the UE is in the bearer separation and the local node information where the UE is currently located, and/or the bearer information currently being used by the UE on the local node.
  • control module 192 is specifically configured to:
  • control module 192 is further configured to:
  • the local node for performing bearer separation is reselected, and the fifth notification information is sent to the source macro base station to indicate the source macro base station. Notifying the local node that failed the synchronization to release the UE-related bearer configuration and the local node that failed the notification synchronization to send the cached UE-related data to the base station; or
  • the local node for performing bearer separation is reselected, and the local node that fails the synchronization is notified to release the bearer configuration related to the UE, and the local node that fails the notification synchronization fails.
  • the buffered UE-related data is sent to the base station.
  • control module 192 is further configured to:
  • the UE's part of the bearer on the local base station needs to be transferred to the local node, and the path conversion request sent to the core network carries the transport address of the bearer to be transferred.
  • the UE's partial bearer on the local node needs to be transferred to the local base station, and the path conversion request sent to the core network carries the transport address of the bearer to be transferred.
  • An embodiment of the present invention further provides another macro base station, as shown in FIG. 20, including a processor and a data transceiving interface 201.
  • FIG. 20 An embodiment of the present invention further provides another macro base station, as shown in FIG. 20, including a processor and a data transceiving interface 201.
  • the processor 201 is configured to: after receiving the handover request sent by the source macro base station, perform an admission decision, where the handover request carries state information for indicating that the UE is in the bearer separation; When the UE supports the bearer separation, the UE performs the bottom house configuration in the base station, and returns a handover request response to the source macro base station, where the handover request response carries the bearer separation support acknowledgement message and the handover command for instructing the UE to perform the handover.
  • the data transceiving interface 202 is configured to send and receive data under the control of the processor.
  • an embodiment of the present invention further provides a user equipment, including: a first management module 211, configured to receive a handover command sent by a source macro base station, and carry a bearer in the handover command After the support confirmation message is separated, the data is stopped from being sent to the source macro base station, and the data sent by the source macro base station is stopped, and the synchronization process is initiated to the handover target macro base station, where the UE stops sending data to the local node and stops receiving data sent by the local node. , or maintaining data transmission to the local node and receiving data sent by the local node;
  • the second management module 212 is configured to perform data transmission with the handover target macro base station and the local node respectively after completing the synchronization process with the handover target macro base station.
  • the first management module 211 receives the handover command sent by the source macro base station, it stops sending data to the local node and stops receiving data sent by the local node; the second management module 192 is further configured to:
  • the second management module 212 is further configured to:
  • the configured third timer is started. If the third timer expires, the feedback information of the handover target macro base station is not received, and the network side handover failure is determined, and the reconstruction target is The macro base station initiates a reconstruction process;
  • the reestablishment target macro base station and the target macro base station that fails handover are the same base station.
  • the first management module 211 stops sending data to the local node and stops receiving data sent by the local node; the second management module 212 is further configured to:
  • the first management module 211 After receiving the handover command sent by the source macro base station, the first management module 211 maintains the data sent to the local node and receives the data sent by the local node.
  • the second management module 212 is further configured to: After determining that the network side handover fails, the data is stopped from being sent to the local node and the data sent by the local node is stopped; and the first notification information indicating that the local node network side handover fails is sent to the local node.
  • the second management module 212 is specifically configured to:
  • the bearer other than the signaling radio bearer SRB0 and not separated to the local node is suspended, and the cell selection process is performed; if the reestablishment process is successful, respectively Data transmission is performed with the reconstruction target macro base station and the local node; if the reconstruction process fails, the data transmission to the local node is stopped and the data sent by the local node is stopped, the RRC connection with the reconstruction target macro base station is released, and the idle state is entered.
  • the second management module 212 is specifically configured to:
  • a fourth notification message is sent to the local node to indicate that the local node reconstruction process failed. Further, if the first management module 211 stops transmitting data to the local node and stops receiving data sent by the local node, the second management module 211 is further configured to:
  • the synchronization process is initiated to the local node; if the synchronization with the local node is successful, the data is sent to the local node and the data sent by the local node is received, and the transmission recovery request is sent to the target macro base station,
  • the indicator macro base station notifies the local node to resume transmitting data to itself and receive data transmitted by itself; if the synchronization with the local node fails, the fifth notification information indicating that the synchronization with the local node fails is sent to the handover target macro base station.
  • the first management module 211 after receiving the handover command, maintains sending data to the local node and receiving data sent by the local node; the second management module 212 is further configured to:
  • the security parameters configured by the macro base station are decoded.
  • the embodiment of the present invention further provides a user equipment, as shown in FIG. 22, including a processor 221 and a data transceiver interface 222, where:
  • the processor 221 is configured to: after receiving the handover command sent by the source macro base station, and carrying the bearer separation support acknowledgement message in the handover command, stop sending data to the source macro base station and stop receiving data sent by the source macro base station And initiating a synchronization process to the handover target macro base station, where the UE stops transmitting data to the local node and stops receiving data sent by the local node, or maintains sending data to the local node and receiving data sent by the local node; After the synchronization process of the station, data transmission is performed respectively with the handover target macro base station and the local node;
  • the data transceiving interface 222 is configured to send and receive data under the control of the processor.
  • the embodiment of the present invention further provides a local node, including: a receiving module 231, configured to receive configuration information sent by a source macro base station or a handover target macro base station;
  • the transmission module 232 is configured to use the security parameters configured by the handover target macro base station carried in the configuration information, respectively The UE and the handover target macro base station perform data transmission;
  • the transmission module 232 stops transmitting data to the UE and stops receiving data sent by the UE, or maintains sending data to the UE and receiving data sent by the UE.
  • the transmission module 232 is specifically configured to: stop sending data to the UE and stop receiving data sent by the UE;
  • the transmission module 202 is specifically configured to: resume sending data to the UE and receive data sent by the UE.
  • the transmitting module 202 is specifically configured to: stop the The UE sends data and stops receiving data sent by the UE, and releases the bearer configuration related to the UE;
  • the transmission module 232 is specifically configured to: maintain data transmission to the UE and receive data sent by the UE, and enable a fourth timer; when the fourth timer expires, the indication of the reestablishment target macro base station has not been received, the data is stopped from being sent to the UE, and the data sent by the UE is stopped, and the resource configuration related to the UE is released, where Reconstructing the target macro base station and the target macro base station failing to be the same base station;
  • the transmitting module 202 is specifically configured to: release the bearer configuration related to the UE.
  • transmission module 232 is further configured to:
  • the transmission module 232 is specifically configured to: forward the data to be sent between the UE and the UE to the reconstruction target macro base station;
  • the transmission module 232 is specifically configured to: update its own resource configuration, and resume transmitting data to the UE and receiving data sent by the UE after completing the bearer separation process with the reconstructed target macro base station.
  • the transmitting module 232 is specifically configured to: start the second timer; if the second timer expires, the UE is not completed. The synchronization process or the channel quality with the UE is not restored, determining that the synchronization with the UE fails; notifying the handover target macro base station that the synchronization with the UE itself fails.
  • the embodiment of the present invention further provides a local node, as shown in FIG. 24, including a processor 241 and a data transceiver interface 243, where:
  • the processor 241 is configured to receive configuration information sent by the source macro base station or the handover target macro base station, and perform data with the UE and the handover target macro base station respectively by using security parameters configured by the handover target macro base station carried in the configuration information. Transmitting; wherein, during the handover process, stopping sending data to the UE and stopping receiving data sent by the UE, or Maintaining data transmission to the UE and receiving data sent by the UE;
  • the data transceiving interface 242 is configured to transceive data under the control of the processor.
  • an embodiment of the present invention further provides a communication system, including: a source macro base station 251, configured to: after determining that a handover process of the user equipment UE is required, to each candidate target abase The station sends a handover request, where the handover request carries state information indicating that the UE is in bearer separation and local node information where the UE is currently located, and/or bearer information currently being used by the UE on the local node; and an alternative to returning the handover request response from the return a target macro base station, the target macro base station that is selected for the UE to perform handover, and the handover command carried in the handover request response returned by the handover target macro base station is sent to the UE, and the data transmission to the UE is stopped and the data sent by the UE is stopped.
  • a source macro base station 251 configured to: after determining that a handover process of the user equipment UE is required, to each candidate target abase
  • the station sends a handover request, where the handover request
  • the handover target macro base station 252 is configured to: after receiving the handover request sent by the source macro base station, perform an admission decision; when determining that the UE is allowed to accept the UE, and supporting the bearer separation, performing the bottom layer configuration of the UE in the base station, and The source macro base station returns a handover request response, and the handover request response carries a bearer separation support acknowledgement message. And a switching command for instructing the UE to switch;
  • the UE 253 is configured to: after receiving the handover command sent by the source macro base station, and carrying the bearer separation support acknowledgement message in the handover command, stop sending data to the source macro base station and stop receiving data sent by the source macro base station, and send the data to the handover target macro base station. Initiating a synchronization process, in which the UE stops transmitting data to the local node and stops receiving data sent by the local node, or maintains sending data to the local node and receiving data sent by the local node; and after completing the synchronization process with the handover target macro base station, Performing data transmission with the handover target macro base station and the local node respectively;
  • the local node 254 is configured to receive the configuration information sent by the source macro base station or the handover target macro base station; and use the security parameters configured by the handover target macro base station carried in the configuration information to perform data transmission with the UE and the handover target macro base station respectively; During the handover process, the local node stops transmitting data to the UE and stops receiving data transmitted by the UE, or maintains transmission of data to the UE and receives data transmitted by the UE.
  • the embodiment of the present invention proposes a specific implementation scheme of the UE in the bearer separation state switching from the source macro base station to the target macro base station, and the data processing scheme in the handover process, thereby solving the existing protocol.
  • the embodiment of the present invention implements the bearer switching function, further achieves the purpose of user plane bearer and control plane bearer separation and convergence; and reduces the number of times the user equipment performs control plane switching, thereby the user equipment in the E-UTRAN network architecture When the switching frequency and the number of times increase, the risk of communication interruption when the user equipment performs handover is reduced.
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the present invention is applicable to computer programs implemented on one or more computer usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) in which computer usable program code is embodied. The form of the product.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

Landscapes

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

Abstract

本申请公开了一种承载分离场景下进行切换的方法、设备及系统,解决了现有协议中还没有针对承载分离场景下,UE在宏基站间切换时的具体实现方案以及在切换过程中数据传输的处理方案。本申请实施例的方法包括:源宏基站在确定需要进行UE的切换过程后,向各备选目标宏基站发送切换请求,该切换请求中携带用于指示UE处于承载分离的状态信息以及UE当前所在的本地节点信息,和/或UE当前在本地节点上的承载信息;从返回切换请求响应的备选目标宏基站中,为UE选定进行切换的目标宏基站,将切换目标宏基站返回的切换请求响应中携带的切换命令发送给UE,并停止向UE发送数据且停止接收该UE发送的数据。

Description

一种承载分离场景下进行切换的方法、 设备及系统 本申请要求在 2013年 01月 06日提交中国专利局、 申请号为 201310003654.5、发明名称为"一 种承栽分离场景下进行切换的方法、 设备及系统"的中国专利申请的优先权, 其全部内容通过 引用结合在本申请中。 技术领域 本发明涉及无线通信技术领域, 特别涉及一种承载分离场景下进行切换的方法、 设备 及系统。 背景技术 目前,演进的通用陆地无线接入网( Evolved Universal Terrestrial Radio Access Network,
E-UTRAN ) 由 eNB (演进基站)组成, E- UTRAN的网络架构参见图 1所示, 其中, eNB 完成接入网功能, 与用户设备(UE, User Equipment )通过空口通信。 UE与 eNB之间既 存在控制面连接, 又存在用户面连接。
对于每一个附着到网络的 UE, 有一个 MME ( Mobility Management Entity, 移动性管 理实体 )为其提供服务, 该 MME称为 UE的服务 MME, MME与 eNB之间釆用 S1-MME 接口连接, S1-MME接口为 UE提供控制面服务, 包括移动性管理和承载管理功能; 对于 每一个附着到网络的 UE, 有一个服务网关( Serving Gateway, S-GW )为其提供服务, 该 S-GW称为 UE的服务 S-GW。 S-GW与 eNB之间采用 S1-U接口相连, S1-U接口为 UE提 供用户面服务, UE的用户面数据通过 S1-U承载在 S-GW和 eNB之间传输。
随着用户对数据业务速率和业务容量的需求不断增长, 传统的宏基站单层覆盖网络的 方式已经不能满足用户的需求, 因此, 第三代移动通信标准化伙伴项目 ( 3fd Generation Partnership Project, 3GPP ) 中引入了分层网络部署, 分屋网络的网络架构参见图 2所示, 宏基站(Macro eNB )提供基础覆盖, 低功率的本地基站(Local eNB )提供热点覆盖, 本 地节点与 Macro eNB之间存在数据 /信令接口 (可以是有线或无线接口), UE可以工作在 Macro eNB或本地基站下。
由于本地基站控制的小区 (如小小区 (Small Cell )等)覆盖范围小, 服务的 UE数量 少, 所以, 连接到 Local eNB的 UE往往能获得更好的服务质量, 如: 获得更高的业务速 率, 更高质量的链路等。 因此, 当连接到 Macro eNB的 UE进入 Local eNB控制的小区的 覆盖范围时, 可以转移到 Local eNB以获得 Local eNB提供的服务; 当 UE远离 Local eNB 控制的小区的覆盖范围时, 需要转移到 Macro eNB控制的小区, 以保持无线连接。 现有长期演进系统(Long Term Evolution, LTE ) 中, 参见图 3所示, X2切换过程包 括如下步骤:
步骤 301、 源 eNB ( Source eNB )对 UE进行测量配置, UE根据收到的测量配置信息 执行测量;
步驟 302、 UE向源 eNB上 测量结果,该测量结果将用于辅助源 eNB进行切换判决; 步驟 303、源 eNB进行测量判决。如果源 eNB决定要进行切换,则继续执行后继步骤; 步骤 304、 源 eNB向目标 eNB ( Target eNB )发送切换请求消息, 该切换请求消息中 携带切换准备相关信息;
步骤 305、 目标 eNB根据接收到的切换倚求消息进行接纳控制, 并配置新的承载, 包 括信令无线^载 (Signaling Radio Bearer, SRB ) 以及分组数据聚合协议 ( Packet Data Convergence Protocol, PDCP ) /无线链路控制 ( Radio Link Control, RLC ) /媒体接入控制 ( Medium Access Control, MAC ) 实体等。 如果配置成功, 则执行步骤 306;
步骤 306、 目标 eNB向源 eNB返回切换请求响应消息;
步 307、 源 eNB通过无线资源控制 ( Radio Resource Control, RRC )重配置消息将 接收到的切换命令告知 UE,同时停止本基站上针对该 UE的数据收发; UE在接收到该 RRC 重配置消息后, 停止在源 eNB上的数据收发;
步骤 308、 源 eNB将当前数据发送的序列号( Serial Number , SN )状态信息发送给目 标 eNB;
步骤 309、 UE向目标 eNB发起上 /下行同步过程, 在完成下行同步后, 发起非竟争随 机接入过程;
步驟 310、 目标 eNB 返回随机接入信道(Random Access Channel, RACH ) 响应 ( response )消息,并携带为 UE分配的上行资源和 UE定时提前量( Timing Advance, TA ); 在完成上行同步后, UE将使用新的安全密钥及新的 PDCP/RLC/MAC实体进行用户面 承载和控制面承载的收发。
步驟 311、 UE向目标 eNB返回切换完成消息(即 RRC重配置完成消息;); 此后, UE 和目标 eNB之间可以进行数据的收发;
相应的, 目标 eNB 接收到该 RRC 重配置完成消息后, 返回 RLC 的应答 ( Acknowledgement, ACK )消息; 而 UE在接收到 RRC重配置完成消息的 ACK消息后, 开始进行用户面的上行数据的发送;
步驟 312、 目标 eNB向 MME发起路径转换请求;
步驟 313、 MME向 S-GW发起承载修改请求;
步骤 314、 S-GW进行路径转换;
步骤 315、 S-GW向 MME返回承载修改响应; 步驟 316、 MME向目标 eNB返回路径转换响应; 至此, 路径切换完成。
步骤 317、 目标 eNB向源 eNB发送 UE上下文释放指示;
步骤 318、 源 eNB释放为已切换的 UE所分配的相关资源。
由于 Local eNB数量多,覆盖小,导致 UE需要频繁在 Macro eNB对应的小区和 Local eNB对应的小区之间切换。 为了降低切换频率, 一种用户面和控制面分离的网络部署场景 被引入, 此时, UE同时连接两个 eNB。 目前提出的承载分离的网络架构包括如下两种: 架构 1、 参见图 4所示, 在架构下, UE的 SRB全部维持在 Marco eNB , 全部或者部 分数据无线承载( Data Radio Bearer, DRB )转移到 Local eNB进行传输。 图中虚线部分接 口只有当 DRB为部分承载分离时才存在。
架构 2、参见图 5所示,该架构与架构 1的主要区别在于: Local eNB可以有部分 RRC 管理功能(如无线资源管理或者测量等), 但是 RRC连接仍然维持在 Marco eNB。
对于异构网络(HetNet )的部署来说, 可能存在一个 Small Cell在多个宏基站的宏覆 盖范围内部署的场景, 参见图 6所示, 图 6中的 Small Cell位于两个宏基站的交叠区域, 该场景下,可提高宏基站边缘区域的性能和边缘用户的满意度。处于承载分离状态下的 UE 有可能需要从一个宏基站(称为源宏基站)切换到另一个宏基站(称为 标宏基站), 然 而,现有协议中还没有针对承载分离场景下,特别是本地节点 Local eNB/Small Cell由多个 宏基站共享的承载分离场景下, UE在宏基站间进行切换的方案。
综上所述, 现有协议中还没有针对承载分离场景下, UE在宏基站间切换时的具体实 现方案以及在切换过程中数据传输的处理方案。 发明内容 本发明实施例提供了一种承载分离场景下进行切换的方法、 设备及系统, 解决了现有 协议中还没有针对承载分离场景下, UE在宏基站间切换时的具体实现方案以及在切换过 程中数据传输的处理方案。
本发明实施例提供的一种承载分离场景下进行切换的方法, 包括:
源宏基站在确定需要进行用户设备 UE的切换过程后, 向各备选目标宏基站发送切换 请求, 所述切换请求中携带用于指示所述 UE处于承载分离的状态信息以及所述 UE当前 所在的本地节点信息, 和 /或 UE当前在本地节点上的承载信息;
所述源宏基站从返回切换请求响应的备选目标宏基站中, 为所述 UE选定进行切换的 目标宏基站 , 将切换目标宏基站返回的切换请求响应中携带的切换命令发送给所述 UE, 并停止向所述 UE发送数据且停止接收该 UE发送的数据。
本发明实施例提供的一种承载分离场景下进行切换的方法, 包括: 备选目标宏基站在接收到源宏基站发送的切换请求后, 进行接纳判决, 其中, 所述切 换请求中携带用于指示 UE处于承载分离的状态信息;
所述备选目标宏基站在确定自身允许接纳所述 UE且自身支持承载分离时, 进行所述 UE在本基站中的底屋配置, 并向所述源宏基站返回切换请求响应消息, 所述切换请求响 应中携带承载分离支持确认消息及用于指示所述 UE进行切换的切换命令。
本发明实施例提供的一种承载分离场景下进行切换的方法, 包括:
UE在接收到源宏基站发送的切换命令, 且所述切换命令中携带承载分离支持确认消 息后, 停止向所述源宏基站发送数据且停止接收所述源宏基站发送的数据, 并向切换目标 宏基站发起同步过程, 其中, 所述 UE停止向本地节点发送数据且停止接收所述本地节点 发送的数据, 或维持向本地节点发送数据及接收所述本地节点发送的数据;
所述 UE在完成与所述切换目标宏基站的同步过程后, 分别与所述切换目标宏基站及 所述本地节点进行数据传输。
本发明实施例提供的一种承载分离场景下进行切换的方法, 包括:
本地节点接收源宏基站或切换目标宏基站发送的配置信息;
所述本地节点使用所述配置信息中携带的切换目标宏基站配置的安全参数,分别与 UE 及所述切换目标宏基站进行数据传输;
其中, 在切换过程中, 所述本地节点停止向所述 UE发送数据且停止接收该 UE发送 的数据, 或维持向所述 UE发送数据及接收该 UE发送的数据。
本发明实施例提供的一种宏基站, 该宏基站包括:
第一处理模块, 用于在确定需要进行用户设备 UE的切换过程后, 向各备选目标宏基 站发送切换请求, 所述切换请求中携带用于指示所述 UE处于承载分离的状态信息以及所 述 UE当前所在的本地节点信息, 和 /或 UE当前在本地节点上的承载信息;
第二处理模块, 用于从返回切换请求响应的备选目标宏基站中, 为所述 UE选定进行 切换的目标宏基站, 将切换目标宏基站返回的切换请求响应中携带的切换命令发送给所述 UE, 并停止向所述 UE发送数据且停止接收该 UE发送的数据。
本发明实施例提供的另一种宏基站, 该宏基站包括:
第一控制模块, 用于在接收到源宏基站发送的切换请求后, 进行接纳判决, 其中, 所 述切换倚求中携带用于指示 UE处于承载分离的状态信息;
第二控制模块, 用于在确定自身允许接纳所述 UE, 且自身支持承载分离时, 进行所 述 UE在本基站中的底层配置, 并向所述源宏基站返回切换请求响应, 所述切换请求响应 中携带承载分离支持确认消息及用于指示所述 UE进行切换的切换命令。
本发明实施例提供的一种用户设备, 该用户设备包括:
第一管理模块, 用于在接收到源宏基站发送的切换命令, 且所述切换命令中携带承载 分离支持确认消息后, 停止向所述源宏基站发送数据且停止接收所述源宏基站发送的数 据, 并向切换目标宏基站发起同步过程, 其中, 所述 UE停止向本地节点发送数据且停止 接收所述本地节点发送的数据, 或维持向本地节点发送数据及接收所述本地节点发送的数 据;
第二管理模块, 用于在完成与所述切换 标宏基站的同步过程后, 分别与所述切换司 标宏基站及所述本地节点进行数据传输。
本发明实施例提供的一种本地节点, 该本地节点包括:
接收模块, 用于接收源宏基站或切换目标宏基站发送的配置信息;
传输模块, 用于使用所述配置信息中携带的切换目标宏基站配置的安全参数, 分别与 所述 UE及所述切换目标宏基站进行数据传输;
其中, 在切换过程中, 所述传输模块停止向所述 UE发送数据且停止接收该 UE发送 的数据, 或维持向所述 UE发送数据及接收该 UE发送的数据。
本发明实施例提供的一种通信系统, 该通信系统包括:
源宏基站, 用于在确定需要进行用户设备 UE的切换过程后, 向各备选目标宏基站发 送切换请求,所述切换请求中携带用于指示所述 UE处于承载分离的状态信息以及所述 UE 当前所在的本地节点信息, 和 /或 UE当前在本地节点上的承载信息; 以及从返回切换请求 响应的备选目标宏基站中, 为所述 UE选定进行切换的目标宏基站, 将切换目标宏基站返 回的切换请求响应中携带的切换命令发送给所述 UE,并停止向所述 UE发送数据且停止接 收该 UE发送的数据;
切换目标宏基站, 用于在接收到所述源宏基站发送的切换请求后, 进行接纳判决; 在 确定自身允许接纳所述 UE,且自身支持承载分离时,进行所述 UE在本基站中的底层配置, 并向所述源宏基站返回切换请求响应, 所述切换请求响应中携带承载分离支持确认消息及 用于指示所述 UE进行切换的切换命令;
UE,用于在接收到源宏基站发送的切换命令,且所述切换命令中携带承载分离支持确 认消息后, 停止向所述源宏基站发送数据且停止接收所述源宏基站发送的数据, 并向切换 目标宏基站发起同步过程, 其中, 所述 UE停止向本地节点发送数据且停止接收所述本地 节点发送的数据, 或维持向本地节点发送数据及接收所述本地节点发送的数据; 以及在完 成与所述切换目标宏基站的同步过程后, 分别与所述切换目标宏基站及所述本地节点进行 数据传输;
本地节点, 用于接收源宏基站或切换 标宏基站发送的配置信息; 以及使用所述配置 信息中携带的切换目标宏基站配置的安全参数, 分别与 UE及所述切换目标宏基站进行数 据传输; 其中, 在切换过程中, 所述本地节点停止向所述 UE发送数据且停止接收该 UE 发送的数据, 或维持向所述 UE发送数据及接收该 UE发送的数据。 本发明实施例针对承载分离场景, 提出了处于承载分离状态的 UE从源宏基站切换到 目标宏基站的具体实现方案, 以及在进行切换过程中数据的处理方案, 从而解决了现有协 议中还没有针对承载分离场景下, UE 在宏基站间切换时的具体实现方案以及在切换过程 中数据传输的处理方案的问题。 附图说明 图 1为背景技术中 E-UTRAN的网络架构示意图;
图 2为背景技术中分层网络部署场景结构示意图;
图 3为背景技术中 LTE系统的 X2切换过程的流程示意图;
图 4为背景技术中第一种承载分离的网络架构示意图;
图 5为背景技术中第二种承载分离的网絡架构示意图;
图 6为背景技术中异构网絡下宏基站交叠区域部署 Small Cell的结构示意图; 图 7为本发明实施例承载分离场景下源宏基站进行切换的方法流程图;
图 8为本发明实施例承载分离场景下目标宏基站进行切换的方法流程图; 图 9为本发明实施例承载分离场景下 UE进行切换的方法流程图;
图 10为本发明实施例承载分离场景下本地节点进行切换的方法流程图;
图 11为本发明实施例第一个应用场景下切换过程的交互流程图;
图 12为本发明实施例第二个应用场景下切换过程的交互流程图;
图 13为本发明实施例的方式 1中各设备之间的交互流程图;
图 14为本发明实施例的方式 2中各设备之间的交互流程图;
图 15为本发明实施例的方式 A中各设备之间的交互流程图;
图 16为本发明实施例的方式 B中各设备之间的交互流程图;
图 17为本发明实施例一种作为源宏基站的宏基站的结构示意图;
图 18为本发明实施例另一种作为源宏基站的宏基站的结构示意图;
图 19为本发明实施例一种作为切换目标基站的宏基站的结构示意图;
图 20为本发明实施例另一种作为切换目标基站的宏基站的结构示意图;
图 21为本发明实施例一种用户设备的结构示意图;
图 22为本发明实施例另一种用户设备的结构示意图;
图 23为本发明实施例一种本地节点的结构示意图;
图 24为本发明实施例另一种本地节点的结构示意图;
图 25为本发明实施例通信系统的结构示意图。 具体实施方式 本发明实施例针对承载分离场景, 提出了处于承载分离状态的 UE从源宏基站切换到 目标宏基站的具体实现方案, 以及在进行切换过程中数据传输的处理方案, 从而解决了现 有协议中还没有针对承载分离场景下, UE在宏基站间切换时的具体实现方案以及在切换 过程中数据传输的处理方案的问题。
参见图 7所示, 针对源宏基站, 本发明实施例的承载分离场景下进行切换的方法, 包 括以下步骤:
步驟 71、 源宏基站在确定需要进行 UE的切换过程后, 向各备选目标宏基站发送切换 请求, 该切换请求中携带用于指示该 UE处于承载分离的状态信息以及该 UE当前所在的 本地节点信息, 和 /或 UE当前在本地节点上的承载信息;
具体的, 源宏基站可以在切换请求包含的切换准备信息中的接入层配置 (Access Stratum Configuration, AS-Config )信息中携带 UE当前在本地节点上的承载信息(如数 据无线承载(Data Radio Bearer, DRB ) L2配置信息); 进一步, 该 AS-Config信息中还 可以携带参与承载分离业务传输的本地节点(如 Local eNB下的 Small Cell )当前的 eNB ID、 Cell ID和 /或无线资源配置等信息。
优选的, 为了保持该本地节点在切换后, 仍可以承担该承载分离业务传输, 源宏基站 在切换准备信息中的接入层上下文( AS-Context )信息中携带相同的物理小区标识( Physical Cell Identifier, PCI )作为备选切换目标, 从而使备选目标宏基站可以根据该 PCI, 与该本 地节点进行承载分离业务传输。
步骤 72、 源宏基站从返回切换请求响应的备选目标宏基站中, 为 UE选定进行切换的 目标宏基站, 接收切换目标宏基站返回的携带承载分离支持确认消息及用于指示该 UE进 行切换的切换命令, 将切换目标宏基站返回的切换请求响应中携带的切换命令发送给该 UE, 并停止向该 UE发送数据且停止接收该 UE发送的数据。
本发明实施例中, 步驟 72中, 源宏基站将切换目标宏基站返回的切换命令通过 RRC 连接重配置消息发送给 UE, 该切换命令中携带承载分离支持确认消息。
本发明实施例中, 步骤 72 中, 若源宏基站仅接收到一个备选目标宏基站返回的切换 请求响应, 则将该备选目标宏基站选定为进行切换的目标宏基站;
若源宏基站接收到至少两个备选目标宏基站返回的切换请求响应, 则从该至少两个备 选目标宏基站中选定一个作为切换目标宏基站。
优选的, 切换目标宏基站返回的切换请求响应携带本切换目标宏基站分别针对该 UE 当前在本切换目标宏基站上的承载的配置信息、 分离到本地节点的承载的配置信息以及承 担该承载分离业务传输的本地节点的无线链路配置信息和 /或服务小区配置信息等,源宏基 站接收到切换目标宏基站返回的切换请求响应之后, 该方法还包括:
源宏基站将该切换请求响应中携带的切换目标宏基站分别针对 UE当前在本地节点上 的承载的配置信息及本地节点的无线链路的配置信息和 /或服务小区配置信息发送给该本 地节点。
优选的, 切换目标宏基站返回的切换请求响应携带切换 标宏基站配置的安全参数, 源宏基站还将切换请求响应中携带的切换目标宏基站配置的安全参数发送给本地节点, 以 使本地节点使用切换目标宏基站配置的安全参数进行数据传输。
优选的, 切换命令中还携带有切换目标宏基站配置的安全参数, 以使 UE使用切换目 标宏基站配置的安全参数进行数据传输。
进一步, 步骤 72之后, 该方法还包括:
源宏基站在接收到切换目标宏基站发送的 UE上下文释放指示后, 释放与 UE相关的 资源, 从而完成本次切换过程。
本发明实施例中, 该方法还包括:
源宏基站确定 UE在接收到切换命令后停止向本地节点发送数据且停止接收该本地节 点发送的数据时, 向本地节点发送第一通知信息, 以通知本地节点停止向该 UE发送数据 且停止接收该 UE发送的数据。
具体的, 源宏基站与 UE双方约定 UE是否在接收到切换命令后停止向本地节点发送 数据且停止接收该本地节点发送的数据;或者,源宏基站通知 UE和本地节点是否停止 UE 和本地节点间的数据传输; 或者, 源宏基站在接收到 UE发送的第三告知信息后,确定 UE 在接收到切换命令后停止向本地节点发送数据且停止接收该本地节点发送的数据。
本发明实施例中, 在切换之前, UE 同时工作在源宏基站及本地节点上, 并使用源宏 基站配置的安全参数分别与该源宏基站及本地节点进行数据传输; 在 UE成功切换到源宏 基站为其选定的切换目标宏基站之后, UE 同时工作在切换目标宏基站及本地节点上, 并 使用切换目标宏基站配置的安全参数分别与该切换目标宏基站及本地节点进行数据传输; 在切换之前, 本地节点使用源宏基站配置的安全参数分别与源宏基站及 UE进行数据 传输; 在 UE成功切换到源宏基站为其选定的切换目标宏基站之后, 本地节点使用切换目 标宏基站配置的安全参数分别与该切换目标宏基站及 UE进行数据传输。
基于上述实施例, 针对备选目标宏基站, 本发明实施例的承载分离场景下进行切换的 方法, 参见图 8所示, 包括以下步驟:
步驟 81、备选 标宏基站在接收到源宏基站发送的切换请求后,进行接纳判决,其中, 切换请求中携带用于指示 UE处于承载分离的状态信息;
源宏基站发送的切换请求中携带用于指示该 UE处于承载分离的状态信息以及该 UE 当前所在的本地节点信息, 和 /或 UE当前在本地节点上的承载信息。 具体的, 备选目标宏基站参考源宏基站发送的切换请求, 根据待接纳的承载(即 UE 当前在源宏基站上的承载)的业务质量(Quality of Service, QoS )、 当前干扰、 负荷情况 等信息进行接纳判决。
步驟 82、 备选目标宏基站在确定自身允许接纳该 UE且自身支持承载分离时, 进行该 UE在本基站中的底居配置, 并向源宏基站返回切换请求响应, 该切换请求响应中携带承 载分离支持确认消息及用于指示该 UE进行切换的切换命令。
优选的, 该切换命令中携带有该备选目标宏基站配置的安全参数。
本发明实施例中, 步骤 82 中, 备选目标宏基站根据源宏基站发送的切换请求, 获知 该 UE处于承载分离状态以及该 UE当前所在的本地节点信息, 和 /或 UE当前在本地节点 上的承载信息后, 该备选 标宏基站判断自身能否支持承载分离以及是否需要对分离的承 载进行更新(如: 备选目标宏基站判断是否要对本地节点上的承载的个数进行调整, 或者 对分离到本地节点上的承载的配置信息进行更新等);
若备选目标宏基站支持承载分离, 则在向源宏基站返回的切换请求响应中携带承载分 离支持确认消息。
本发明实施例中, 备选司标宏基站进行的该 UE在本基站中的底层配置包括: RLC配 置信息、 MAC配置信息、 专有物理层配置信息(包括 PDSCH ( Physical Downlink Shared Channel, 物理下行链路共享信道)专有配置 / PUCCH ( Physical Uplink Control CHannel, 物理上行链路控制信道)专有配置 / PUSCH ( Physical Uplink Shared Channel, 物理上行链 路共享信道)专有配置 /上行功率控制专有配置等)、 RACH ( Random Access Channel, 随 机接入信道)专有配置信息等。
优选的, 步驟 82 中, 备选目标宏基站向源宏基站返回切换请求响应的切换命令中携 带本基站分别针对该 UE当前在本基站上的承载(如 SRB以及对应的 DRB )的配置信息、 分离到本地节点的承载的配置信息以及承担该承载分离业务传输的本地节点的无线链路 配置信息和 /或服务小区配置信息等。
优选的, 步骤 82中, 备选 标宏基站可以根据接纳测量判定, 可以重新为 UE选择一 本地节点切换小区。 备选目标宏基站选定另一个本地节点切换小区后, 向该更新的本地节 点发送切换接纳请求, 该请求消息中包括 UE标识、 UE在原本地节点的承载配置信息、 无 线资源配置信息, 目标宏基站调整在本地节点传输的承载配置信息。 所述更新的本地节点 根据目标宏基站的请求信息,进行接纳判决和切换接纳请求消息反馈,反馈信息中包括 UE 标识、 UE在该本地节点接纳的承载配置信息、 无线资源配置信息。 而后, 标宏基站将 本基站针对该 UE的承载配置信息、 无线资源配置信息, 以及分离承载的更新的本地节点 信息、 分离在更新的本地节点上的承载配置信息、 无线资源配置信息等, 通知给源基站。 源基站可以将目标宏基站通知的切换请求反馈信息通知给原本地节点。 而后, 承载在原本 地节点的未被确认或传输的承载的数据,从原本地节点或源基站前转到目标宏基站和 /或更 新的本地节点。
优选的, 若备选目标宏基站为源宏基站为 UE选定的切换目标宏基站; 该切换目标宏 基站在确定自身允许接纳 UE之后, 且在向源宏基站返回切换倚求响应之前, 该方法还包 括:
切换目标宏基站与本地节点或更新的本地节点建立专用承载连接, 并通过该专用承载 连接将本基站分别针对该 UE当前在本地节点上的承载的配置信息及本地节点的无线链路 的配置信息和 /或服务小区配置信息发送给本地节点。
优选的, 若切换中本地节点发生变更, 切换目标宏基站还通知更新的本地节点原本地 节点的信息, 包括原本地节点标识、 原本地节点上的承载配置信息、 原本地节点的无线资 源配置信息等。 更新的本地节点后续将建立与原本地节点的专用承载连接, 接收从原本地 节点前转的用户数据, 或接收切换目标宏基站从源基站获取或原本地节点前转的用户数 据。
优选的, 若切换中本地节点发生变更, 源基站获取从切换目标宏基站通知的本地节点 变更指示后, 通知原本地节点用户的本地节点发生变更, 原本地节点停止与用户的数据传 输和处理过程。
优选的, 切换目标宏基站还通过该专用承载连接将本基站配置的安全参数发送给本地 节点, 以使本地节点采用该切换目标宏基站配置的安全参数进行数据传输。
进一步, 切换目标宏基站在与 UE完成同步过程后, 该方法还包括:
切换目标宏基站向 UE发送上行的资源分配以及定时同步信息;
切换目标宏基站在接收到该 UE返回的切换完成消息后,与该 UE进行数据的上 /下行 传输, 并向核心网 (CN )发送路径转换请求;
切换目标宏基站在接收到核心网返回的路径转换请求响应后, 向源宏基站发送 UE上 下文释放指示, 以使源宏基站释放相应的资源, 从而完成本次切换过程。
本发明实施例中, 该方法还包括:
切换目标宏基站在接收到 UE发送的传输恢复请求后,向本地节点发送第一指示信息, 以指示本地节点恢复向该 UE发送数据及接收该 UE发送的数据。
基于上述实施例, 针对 UE, 本发明实施例的承载分离场景下进行切换的方法, 参见 图 9所示, 包括以下步驟:
步據 91、 UE在接收到源宏基站发送的切换命令, 且该切换命令中携带承载分离支持 确认消息后, 停止向源宏基站发送数据且停止接收该源宏基站发送的数据, 并向切换目标 宏基站发起同步过程, 其中, UE停止向本地节点发送数据且停止接收该本地节点发送的 数据, 或维持向本地节点发送数据及接收该本地节点发送的数据; 步驟 92、 UE在完成与切换目标宏基站的同步过程后, 分别与该切换目标宏基站及本 地节点进行数据传输。
具体的, UE与切换目标宏基站的同步过程, 包括:
UE在完成下行同步后, 向切换目标宏基站发起随机接入(Random Access, RA )过程; 切换目标宏基站接收到前导序列 ( preamble )后, 向 UE返回 RACH响应 ( response ) 消息, 该 RACH响应消息中携带本基站调整的 TA值等信息;
UE向切换目标宏基站返回切换完成消息(即 RRC重配置完成消息;), 确认切换成功; 切换目标宏基站接收到该切换完成消息后, 向 UE返回 RLC的 ACK消息, 同时开始 进行下行数据的发送, 并向核心网发送路径转换请求, 在接收到核心网返回的路径转换请 求后, 通知源宏基站释放与该 UE相关的承载及 UE的上下文; 以及
UE在接收到 ACK消息后, 开始在切换目标宏基站上进行数据传输, 此时, UE以承 载分离状态同时工作在切换目标宏基站及本地节点上。
优选的, 为了确保确认模式(Acknowledged Mode, AM )数据的无损操作, 源宏基站 向切换目标宏基站前转尚未得到确认或新接收到的该 UE的数据。
进一步, 步驟 91中, UE在停止向源宏基站发送数据且停止接收该源宏基站发送的数 据时, 针对自身与本地节点的数据传输, 采用以下两种方式进行处理:
方式一、 UE停止向本地节点发送数据且停止接收该本地节点发送的数据, 直至该 UE 与该本地节点重新同步成功后, 恢复向本地节点发送数据及接收该本地节点发送的数据; 优选的, 该方法还包括:
UE向本地节点发送第二告知信息,以指示本地节点停止向该 UE发送数据且停止接收 该 UE发送的数据; 或者 UE向源宏基站发送第三告知信息, 以指示源宏基站通知本地节 点停止向该 UE发送数据且停止接收该 UE发送的数据;
相应的, 源宏基站在接收到 UE发送的第三告知信息后, 确定 UE在接收到切换命令 后停止向本地节点发送数据且停止接收该本地节点发送的数据, 并向本地节点发送第一通 知信息, 以通知该本地节点停止向该 UE发送数据且停止接收该 UE发送的数据。
进一步, UE在与切换目标宏基站完成同步, 并向该切换目标宏基站反馈切换完成消 息后(即 UE向该切换目标宏基站反馈切换完成消息后), 该方法还包括:
UE向本地节点发起同步过程; 其中, UE与本地节点的同步过程中使用切换目标宏基 站配置的安全参数进行数据传输;
若 UE与本地节点同步成功, UE向切换 标宏基站发送传输恢复倚求; 相应的, 切换 目标宏基站向本地节点发送第一指示信息, 以指示本地节点恢复向 UE发送数据及接收该 UE发送的数据; 从而恢复 UE与本地节点之间的数据传输, 此时, UE与本地节点之间的 数据传输均釆用切换目标宏基站配置的安全参数。 若 UE与本地节点同步失败, UE向切换目标宏基站发送用于指示本地节点同步失败的 第五告知信息。
优选的, 若切换中本地节点发生变更, UE在切换命令中获知本地节点发生变更, 或 UE收到切换命令后直接停止在源宏基站和原本地节点的数据传输, UE与目标宏基站和更 新的本地节点进行同步过程。 进一步的, 在 UE和更新的本地节点同步完成后, 由 UE或 更新的本地节点通知目标宏基站用户和本地节点同步完成, 可以进行后续数据传输。
方式二、 UE维持向本地节点发送数据及接收该本地节点发送的数据;
该方式下, 在切换过程中, 该方法还包括:
UE使用源宏基站配置的安全参数及切换目标宏基站配置的安全参数, 分别对本地节 点发送的数据进行解码; 及
UE在使用切换目标宏基站配置的安全参数成功解码后, 中止使用源宏基站配置的安 全参数进行解码。
该方式下, 由于宏基站切换前后, 本地节点不发生变化, 且 UE在本地节点上的数据 传输未中止, 优选的, 切换命令中还携带用于指示本地节点不前传 UE在该本地节点上的 数据的信息。
该方式下, 切换过程中, 处于承载分离状态的 UE在本地节点上的数据可以始终维持 传输状态, 从而降低了数据中断时延, 显著提高了异构网络中传输高速数据的用户感受。
基于上述实施例, 针对本地节点, 本发明实施例的承载分离场景下进行切换的方法, 参见图 10所示, 包括以下步骤:
步驟 101、 本地节点接收源宏基站或切换 标宏基站发送的配置信息;
其中, 该配置信息至少包括切换目标宏基站分别针对 UE当前在本节点上的承载的配 置信息、 本节点的无线链路的配置信息以及切换目标宏基站配置的安全参数;
步骤 102、 本地节点使用切换目标宏基站配置的安全参数, 分别与 UE及切换目标宏 基站进行数据传输; 其中, 在切换过程中, 本地节点停止向该 UE发送数据且停止接收该 UE发送的数据, 或维持向该 UE发送数据及接收该 UE发送的数据。
进一步, 该方法还包括:
本地节点在接收到源宏基站发送的第一通知信息或 UE发送的第二告知信息后, 停止 向 UE发送数据且停止接收该 UE发送的数据; 以及
本地节点在接收到切换目标宏基站发送的第一指示信息后, 恢复向该 UE发送数据及 接收该 UE发送的数据。
本发明实施例的本地节点包括但不限于下列设备中的一种:
本地基站( Local eNB )、低功率( Pico )基站、 家庭( Femto )基站、射频拉远( Remote Radio Heads, RRH )、 中继( repeater )、 RN (中继设备)等。 下面结合以下两个应用场景, 对上述切换过程进行详细说明。
实施例一、 本实施例中, UE从源宏 eNB切换至目标宏 eNB, 且该 UE在接收到源宏 基站发送的切换命令后, 停止向本地节点(本实施例为 Small Cell )发送数据且停止接收 该本地节点发送的数据,参见图 11所示,本实施例中源宏 eNB、 目标宏 eNB、 UE及 Small Cell之间的交互如下:
步驟 1101、 源宏 eNB对 UE进行测量控制, 通过 RRC连接重配置(Connection Reconfiguration ) 中的: ί则量 S己置 IE ( Measurement Configuraion IE ) 实现;
步骤 1102、 UE向源宏 eNB上报测量结果;
步骤 1103、 源宏 eNB根据 UE上报的测量结果, 进行切换判决;
步骤 1104、 源宏 eNB在确定需要进行 UE的切换过程后, 向 标宏 eNB发送切换请 求;
步骤 1105、 目标宏 eNB进行接纳控制;
步骤 1105a、 目标宏 eNB向 Small Cell发起建立专有承载过程;
步驟 1105b、 Small Cell向目标宏 eNB返回专有承载建立响应;
步驟 1106、 目标宏 eNB在确定自身允许接入该 UE且自身支持承载分离后, 向源宏 eNB发送切换请求响应; 该切换请求响应中携带承载分离支持确认消息及用于指示 UE进 行切换的切换命令;
步骤 1107、 源宏 eNB向 UE发送切换命令;
相应的, UE在接收到该切换命令后, 停止向源宏 eNB及 Small Cell发送数据且停止 接收源宏 eNB及 Small Cell发送的数据;
步驟 1107a、 源宏 eNB通知 Small Cell停止旧承载数据传输, 即停止向 UE发送数据 且停止接收该 UE发送的数据;
步骤 1108、 UE在接收到切换命令后, 发起与目标宏 eNB同步过程;
进一步, UE在完成与目标宏 eNB的同步后, 触发自身与 Small Cell的同步过程(该 过程中, UE使用司标宏 eNB配置的安全参数进行数据传输);
步驟 1109、 目标宏 eNB向 UE发送上行资源分配及定时同步信息;
步骤 1110、 UE向目标宏 eNB返回切换完成消息, 以确定切换成功;
此时, UE将以承载分离状态同时工作在 Small Cell和目标宏 eNB上;
步骤 1111、 目标宏 eNB向核心网 ( CN )发送路径转换请求;
步驟 1112、 CN进行下行数据路径转换;
步驟 1113、 CN向目标宏 eNB返回路径转换请求响应;
步骤 1114、 目标宏 eNB向源宏 eNB发送 UE上下文释放指示;
步骤 1115、 源宏 eNB开始释放相应资源。 实施例二、 本实施例中, UE从源宏 eNB切换至目标宏 eNB, 且该 UE在接收到源宏 基站(Macro eNB )发送的切换命令后, 维持向本地节点(本实施例为 Small Cell )发送数 据及接收该本地节点发送的数据, 参见图 12所示, 本实施例中源宏 eNB、 目标宏 eNB、 UE及 Small Cell之间的交互如下:
步驟 1201、 源宏 eNB对 UE进行测量控制;
步驟 1202、 UE向源宏 eNB上报测量结果;
步骤 1203、 源宏 eNB根据 UE上报的测量结果, 进行切换判决;
步骤 1204、 源宏 eNB在确定需要进行 UE的切换过程后, 向目标宏 eNB发送切换请 求;
步骤 1205、 标宏 eNB进行接纳控制;
步驟 1205a、 目标宏 eNB向 Small Cell发起建立专有承载过程;
步骤 1205b、 Small Cell向目标宏 eNB返回专有承载建立响应;
步骤 1206、 目标宏 eNB在确定允许接入该 UE, 且自身支持承载分离后, 向源宏 eNB 发送切换请求响应; 该切换请求响应中携带承载分离支持确认消息及用于指示 UE进行切 换的切换命令;
步驟 1207、 源宏 eNB向 UE发送切换命令;
相应的,UE在接收到该切换命令后,停止向源宏 eNB发送数据且停止接收该源宏 eNB 发送的数据, 并继续维持向 Small Cell发送数据及接收 Small Cell发送的数据;
步骤 1208、 UE在接收到切换命令后, 发起与目标宏 eNB同步过程;
步驟 1209、 标宏 eNB向 UE发送上行资源分配及定时同步信息;
步驟 1210、 UE向目标宏 eNB返回切换完成消息, 以确定切换成功;
此时, UE将以承载分离状态同时工作在 Small Cell和目标宏 eNB上;
步骤 1211、 目标宏 eNB向核心网 ( CN )发送路径转换请求;
步骤 1212、 CN进行下行数据路径转换;
步驟 1213、 CN向目标宏 eNB返回路径转换请求响应;
步驟 1214、 目标宏 eNB向源宏 eNB发送 UE上下文释放指示;
步骤 1215、 源宏 eNB开始释放相应资源。
该应用场景下, 由于切换过程中, UE与本地节点之间的数据传输仍维持, 因此, UE 需要保存源宏基站配置的安全参数及目标宏基站配置的安全参数, 并使用该两套安全参数 分别进行解码, 直至解出使用新的安全参数 (即目标宏基站配置的安全参数 )的 PDCP包 后, 才仅使用新安全参数进行解码。 该应用场景下, Small Cell在接收结束标识后, 仅使 用新的安全参数对发送给 UE的数据进行加密, 即图中的步骤 "切换用户标识上下行新的 加密数据"。 本发明实施例的切换过程中, 有可能发生异常情况, 主要包括以下两种:
第一种异常情况: 网络侧切换失败(即 UE与切换目标宏基站的同步失败); 第二种异常情况: 网络侧切换成功, 但本地节点同步失败(即 UE与本地节点的同步 失败); 其中, 该异常情况的应用场景为: UE在接收到源宏基站发送的切换命令后, 停止 向本地节点发送数据且停止接收该本地节点发送的数据;
本实施例中, 第一种异常情况的判断, 包括以下两种方式:
方式 1、 由源宏基站判断网絡侧切换是否失败, 具体包括:
源宏基站在接收到各备选目标宏基站返回的切换倚求响应或为 UE选定了切换目标宏 基站之后, 启动第一定时器;
若在第一定时器超时时, 源宏基站还未收到切换目标宏基站发送的 UE上下文释放指 示, 确定网络侧切换失败;
源宏基站向本地节点发送第二通知信息, 以指示本地节点根据该第二通知信息进行相 应处理; 以及
源宏基站向 UE发送用于指示该 UE网络侧切换失败的第三通知信息, 以指示该 UE 在接收到该第三通知信息后执行重建过程, 其中, 重建 标宏基站与切换失败的 标宏基 站为同一个基站。
该方式下, 针对本地节点, 该本地节点接收到该源宏基站发送的第二通知信息后, 确 定网络侧切换失败, 并根据该第二通知信息进行相应处理; 具体包括以下两种情况: 第一种情况: 该第二通知信息为指示本地节点停止向 UE发送数据且停止接收该 UE 发送的数据;
相应的, 该本地节点执行: 停止向 UE发送数据且停止接收该 UE发送的数据, 并释 放与该 UE相关的承载配置;
进一步, 本地节点在接收到该第二通知信息后, 执行: 緩存与该 UE相关且未进行处 理或未发送的数据。
进一步, 若 UE在接收到源宏基站发送的切换命令后, 维持向本地节点发送数据及接 收该本地节点发送的数据; 本地节点在接收到该第二通知信息后, 还执行: 通知该 UE停 止向本节点发送数据且停止接收本节点发送的数据。
第二种情况: 该第二通知信息为指示网络侧切换失败;
相应的, 该本地节点执行: 维持向 UE发送数据及接收该 UE发送的数据, 并开启第 四定时器; 以及在该第四定时器超时时, 还未收到重建目标宏基站的指示, 停止向 UE发 送数据且停止接收该 UE发送的数据, 并释放与 UE相关的资源配置。
进一步, 若该本地节点在该第四定时器超时之前, 接收到重建目标宏基站发送的第二 通知信息, 则该本地节点执行: 将自身与 UE之间待传输的数据前转到重建目标宏基站; 若该本地节点在该第四定时器超时之前, 重建目标宏基站向该本地节点发起承载分离 过程, 则该本地节点执行: 更新自身的资源配置, 并在完成与该重建目标宏基站的承载分 离过程后, 恢复向 UE发送数据及接收该 UE发送的数据。
需要说明的是, 该第四定时器的时长可以由本地节点配置, 也可以由源宏基站配置; 另外, 该第四定时器的启动也可以由源宏基站触发。
该方式下, 针对 UE, 该 UE在接收到源宏基站发送的第三通知信息后,确定网络侧切 换失败, 并向重建目标宏基站发起重建过程。
优选的, 该 UE在与重建目标宏基站的重建过程中, 将除 SRB0之外且未分离到本地 节点的承载挂起, 并执行小区选择过程;
若该重建过程成功, UE分别与重建 标宏基站及本地节点进行数据传输; 若该重建过程失败, UE停止向本地节点发送数据且停止接收该本地节点发送的数据, 释放自身与重建目标宏基站的 RRC连接, 并进入空闲 ( RRC— IDLE )状态。
进一步, 该 UE在确定重建过程失败时, 还执行: 向本地节点发送用于指示该本地节 点重建过程失败的第四告知信息。
下面对 UE与重建目标宏基站的重建过程进行详细说明, 包括以下步驟:
UE开启 T311定时器;
UE将除 SRB0之外且未分离到本地节点的承载挂起, 并执行小区选择过程; 在 UE选择到一个合适的重建小区(如 TD-LTE小区)后, 该 UE停止 T311定时器并 开启 T301 定时器, 向重建目标宏基站发送 RRC 连接重建请求 ( RRC Connection Reestablishment Request ) 消息;
UE 在接收到该重建目标宏基站返回的 RRC 连接重建立 ( RRC Connection Reestablishment )消息后, 停止 T301定时器; 以及
UE建立重建小区上对应 SRB1的 PDCP实体和 RLC实体, 恢复 SRB1的传输, 并向 重建目标宏基站发送 RRC连接重建完成( RRC Connection Reestablishment Complete )消息, 从而完成与重建目标宏基站的重建过程; 此时, UE 以承载分离状态同时工作在本地节点 和重建目标宏基站(即原切换失败的目标宏基站)上。
优选的, 重建目标宏基站在完成重建过程后, 进行分离的 RB和配置调整, 并更新使 用的安全参数。
进一步, 该重建过程中, 若 UE在 T311定时器超时时, 未选择到合适的重建小区, 则 确定重建过程失败; 或者
UE在 T301定时器超时时, 未收到该重建目标宏基站返回的 RRC连接重建立消息, 则确定重建过程失败; 或者
UE收到该重建目标宏基站发送的 RRC连接重建拒绝( RRC Connection Reestablishment Reject ) 消息, 则确定重建过程失败。
进一步,在 UE确定该重建过程失败后,该 UE释放自身的 RRC连接,并进入 RRC— IDLE 状态。
下面结合图 13所示的具体实施例, 对方式 1中 UE、 源 Macro eNB、 本地节点及目标 Macro eNB之间的交互进行详细说明,本实施例中, UE从源 Macro eNB切换至司标 Macro eNB , 交互过程如下:
步骤 131、 UE向源 Macro eNB上 4艮测量结果;
步骤 132、 源 Macro eNB根据 UE上报的测量结果进行切换判断;
步骤 133、 源 Macro eNB在确定需要进行切换时, 向目标 Macro eNB发送切换请求; 步骤 134、 源 Macro eNB在接收到该目标 Macro eNB返回的切换请求响应后, 开启已 配置的定时器 Tl, 以判断网络侧切换是否失败;
步骤 135、 源 Macro eNB向 UE发送切换命令;
步骤 136、 若在定时器 T1超时时, 源 Macro eNB还未接收到目标 Macro eNB发送的 UE上下文释放指示, 确定网络侧切换失败;
步驟 137、 源 Macro eNB通知本地节点网络侧切换失败, 并指示本地节点执行切换失 败处理;
步骤 138、 本地节点执行切换失败处理, 如: 停止向 UE发送数据且停止接收该 UE 发送的数据; 緩存与该 UE相关且未进行处理或未发送的数据, 以便于 UE重建后继续传 输; 又如, 维持向 UE发送数据及接收该 UE发送的数据, 启动已配置的定时器 T2, 若在 该定时器 T2超时时仍未收到重建目标宏基站的指示,则停止向 UE发送数据且停止接收该 UE发送的数据; 等等。
方式 2、 由 UE判断网络侧切换是否失败, 具体包括:
UE在确定与切换目标宏基站的随机接入 RA失败后,确定网络侧切换失败, 并向重建 目标宏基站发起重建过程; 或者
UE在向切换目标宏基站发起同步过程时,启动已配置的第三定时器(如 T304定时器), 若在该第三定时器超时时, 未收到切换目标宏基站的反馈信息, 确定网络侧切换失败, 并 向重建目标宏基站发起重建过程;
其中, 重建目标宏基站与切换失败的目标宏基站为同一个基站。
该方式下, 若 UE在接收到源宏基站发送的切换命令后, 停止向源宏基站及本地节点 发送数据且停止接收源宏基站及本地节点发送的数据,则 UE在确定网络側切换失败之后, 还执行: 向本地节点发送用于指示该本地节点网络侧切换失败的第一告知信息;
相应的, 由于本地节点当前已停止向 UE发送数据且停止接收该 UE发送的数据, 则 该本地节点在接收到该第一告知信息后, 释放与该 UE相关的承载配置; 进一步, 本地节点在接收到该第一告知信息后, 緩存与该 UE相关且未进行处理或未 发送的数据, 以便于 UE重建后继续传输。
若 UE在接收到源宏基站发送的切换命令后, 停止向源宏基站发送数据且停止接收该 源宏基站发送的数据, 且维持向本地节点发送数据及接收该本地节点发送的数据, 则 UE 在确定网络侧切换失败之后, 该 UE还执行: 停止向本地节点发送数据且停止接收该本地 节点发送的数据, 以及向本地节点发送用于指示该本地节点网络侧切换失败的第一告知信 息;
相应的, 由于本地节点当前仍维持向 UE发送数据及接收该 UE发送的数据, 则该本 地节点在接收到该第一告知信息后,停止向该 UE发送数据且停止接收该 UE发送的数据, 并释放与该 UE相关的承载配置;
进一步, 本地节点在接收到该第一告知信息后, 緩存与该 UE相关且未进行处理或未 发送的数据, 以便于 UE重建后继续传输。
该方式下, UE 在确定网络侧切换失败后, 向重建目标宏基站发起重建过程, 以及本 地节点的处理过程请参见方式 1中的描述, 此处不再赘述。
下面结合图 14所示的具体实施例, 对方式 2中 UE、 源 Macro eNB、 本地节点及目标
Macro eNB之间的交互进行详细说明,本实施例中, UE从源 Macro eNB切换至目标 Macro eNB , 交互过程如下:
步骤 141、 源 Macro eNB向 UE发送切换命令;
步骤 142、 UE在接收到该切换命令后, 向目标 Macro eNB发起随机接入过程; 步驟 143、 UE确定网络侧切换失败;
步驟 144、 UE通知本地节点网络侧切换失败;
步骤 145、 本地节点进行网络侧切换失败处理; 如: 停止向 UE发送数据且停止接收 该 UE发送的数据; 释放与该 UE相应的承载配置; 緩存与该 UE相关且未进行处理或未 发送的数据; 等等;
步 ¾ 146、 UE向重建目标 Macro eNB发起重建请求, 其过程请参阅方式一中的相关 描述, 此处不再赘述。
本实施例中, 第二种异常情况的判断, 具体包括以下两种方式:
方式 A、 由 UE判断自身与本地节点的同步是否失败, 具体包括:
UE在完成自身与切换目标宏基站的同步过程后, 向本地节点发起同步过程; 若与本地节点的同步成功, 该 UE向切换目标宏基站发送传输恢复请求;
若与本地节点的同步失败, 该 UE向切换目标宏基站发送用于指示本地节点同步失败 的第五告知信息。
相应的, 若切换目标宏基站接收到 UE返回的传输恢复请求, 则该切换目标宏基站执 行: 向本地节点发送第一指示信息, 以指示本地节点恢复向 UE发送数据及接收该 UE发 送的数据;
若切换目标宏基站接收到 UE返回的第五告知信息, 执行: 重新选择承载分离的本地 节点, 目标宏基站选定另一个本地节点切换小区后, 向该更新的本地节点发送切换接纳请 求, 该请求消息中包括 UE标识、 UE在原本地节点的承载配置信息、 无线资源配置信息, 目标宏基站调整在本地节点传输的承载配置信息, 切换目标宏基站还通知更新的本地节点 原本地节点的信息, 包括原本地节点标识、 原本地节点上的承载配置信息、 原本地节点的 无线资源配置信息等。 所述更新的本地节点根据目标宏基站的请求信息, 进行接纳判决和 切换接纳请求消息反馈,反馈信息中包括 UE标识、 UE在该本地节点接纳的承载配置信息、 无线资源配置信息。 而后, 目标宏基站将本基站针对该 UE的承载配置信息、 无线资源配 置信息, 以及分离承载的更新的本地节点信息、 分离在本地节点上的承载配置信息、 无线 资源配置信息等, 通过第五告知信息发送给源宏基站, 以指示源宏基站通知同步失败的本 地节点释放与该 UE相关的承载配置以及通知同步失败的本地节点将自身緩存的与该 UE 相关的数据发送给切换目标宏基站; 或者重新选择承载分离的本地节点, 并通知同步失败 的本地节点释放与该 UE相关的承载配置以及通知同步失败的本地节点将自身緩存的与该 UE相关的数据发送给本基站。 更新的本地节点后续将建立与原本地节点的专用承载连接, 接收从原本地节点前转的用户数据, 或接收切换目标宏基站从源基站获取或原本地节点前 转的用户数据。
下面结合图 15所示的具体实施例, 对方式 A中 UE、 源 Macro eNB、 本地节点及目标 Macro eNB之间的交互进行详细说明,本实施例中, UE从源 Macro eNB切换至司标 Macro eNB , 交互过程如下:
步骤 151、 源 Macro eNB向 UE发送切换命令;
步骤 152、 UE在接收到该切换命令后, 向目标 Macro eNB发起随机接入过程; 其中, UE在接收到该切换命令后, 停止自身与本地节点及源 Macro eNB的数据传输;
步驟 153、 UE在完成与该 标 Macro eNB的切换过程后, 向本地节点发起接入过程; 步驟 154、 UE确定与本地节点接入失败;
步骤 155、 UE通知目标 Macro eNB自身与本地节点接入失败;
步骤 156、 目标 Macro eNB通知本地节点进行接入失败处理; 如: 停止向该 UE发送 数据且停止接收该 UE发送的数据; 释放与该 UE相应的承载配置; 将緩存的与该 UE相 关的数据发送给目标 Macro eNB; 等等;
步驟 157、 目标 Macro eNB执行资源重选, 即重新选择用于承担该承载分离的本地节 方式 B、 由本地节点判断自身与 UE的同步是否失败, 具体包括: 本地节点在接收到源宏基站发送的用于指示启动第二定时器的通知后, 启动该第二定 时器(如定时器 T3, 该 T3的时长可由源宏基站配置或由本地节点配置);
在第二定时器超时时, 若本地节点未完成与 UE的同步过程或与 UE的信道质量未恢 复, 确定自身与 UE同步失败; 以及
本地节点通知切换目标宏基站本节点与 UE同步失败。
相应的, 切换目标宏基站在接收到本地节点发送的本节点与 UE同步失败的通知后, 重新选择承载分离的本地节点, 并通知该本地节点释放与 UE相关的承载配置以及通知该 本地节点将自身緩存的与 UE相关的数据发送给本基站。
下面结合图 16所示的具体实施例, 对方式 B中 UE、 源 Macro eNB、 本地节点及目标 Macro eNB之间的交互进行详细说明, 本实施例中 UE从源 Macro eNB切换至司标 Macro eNB, 交互过程如下:
步骤 161、 源 Macro eNB向 UE发送切换命令;
步骤 162、 UE在接收到该切换命令后, 向目标 Macro eNB发起随机接入过程; 其中, UE在接收到该切换命令后, 停止自身与本地节点及源 Macro eNB的数据传输;
步驟 163、 UE在完成与该 标 Macro eNB的切换过程后, 向本地节点发起接入过程; 步驟 164、 本地节点确定自身与 UE接入失败;
步骤 165、 本地节点通知目标 Macro eNB自身与 UE接入失败;
步骤 166、 目标 Macro eNB通知该本地节点进行接入失败处理; 如: 停止向该 UE发 送数据且停止接收该 UE发送的数据; 释放与该 UE相应的承载配置; 将緩存的与该 UE 相关的数据发送给目标 Macro eNB; 等等;
步驟 167、 目标 Macro eNB执行资源重选, 即重新选择用于承担该承载分离的本地节 上述方法处理流程可以用软件程序实现, 该软件程序可以存储在存储介质中, 当存储 的软件程序被调用时, 执行上述方法步骤。
基于上述实施例, 参见图 17所示, 本发明实施例还提供了一种宏基站, 包括: 第一处理模块 171, 用于在确定需要进行 UE的切换过程后, 向各备选目标宏基站发 送切换请求, 该切换请求中携带用于指示 UE处于承载分离的状态信息以及该 UE当前所 在的本地节点信息, 和 /或 UE当前在本地节点上的承载信息;
第二处理模块 172, 用于从返回切换请求响应的备选目标宏基站中, 为该 UE选定进 行切换的目标宏基站, 将切换 标宏基站返回的切换请求响应中携带的切换命令发送给该 UE, 并停止向该 UE发送数据且停止接收该 UE发送的数据。
进一步, 第二处理模块 172还用于:
将该切换请求响应中携带的切换目标宏基站分别针对 UE当前在本地节点上的承载的 配置信息及本地节点的无线链路的配置信息和 /或服务小区配置信息发送给本地节点。 进一步, 第二处理模块 172具体用于:
在确定 UE在接收到切换命令后停止向本地节点发送数据且停止接收该本地节点发送 的数据后, 向本地节点发送第一通知信息, 以通知本地节点停止向 UE发送数据且停止接 收该 UE发送的数据。
进一步, 第二处理模块 172还用于:
在接收到备选目标宏基站返回的切换请求响应或选定了切换目标宏基站之后, 启动第 一定时器; 在第一定时器超时时,若还未收到切换目标宏基站发送的 UE上下文释放指示, 确定网络侧切换失败; 向本地节点发送第二通知信息, 以指示本地节点根据第二通知信息 进行相应处理; 以及向 UE发送用于指示 UE网络侧切换失败的第三通知信息, 以指示 UE 在接收到第三通知信息后执行重建过程;
其中, 第二通知信息为指示本地节点停止向 UE发送数据且停止接收该 UE发送的数 据, 或者第二通知信息为指示网络侧切换失败; 重建目标宏基站与切换失败的目标宏基站 为同一个基站。
进一步, 第二处理模块 172还用于:
在确定 UE在接收到切换命令后停止向本地节点发送数据且停止接收该本地节点发送 的数据之后, 向本地节点发送第四通知信息, 以通知本地节点开启用于判断本节点与 UE 是否同步成功的第二定时器。
本发明实施例还提供了一种宏基站, 如图 18所示, 包括处理器 181和数据收发接口 182, 其中:
所述处理器被配置为用于: 在确定需要进行 UE的切换过程后, 向各备选目标宏基站 发送切换请求, 该切换请求中携带用于指示 UE处于承载分离的状态信息以及该 UE当前 所在的本地节点信息, 和 /或 UE当前在本地节点上的承载信息; 从返回切换请求响应的备 选目标宏基站中, 为该 UE选定进行切换的目标宏基站, 将切换目标宏基站返回的切换请 求响应中携带的切换命令发送给该 UE,并停止向该 UE发送数据且停止接收该 UE发送的 数据;
所述数据收发接口在所述处理器的控制下收发数据。
基于上述实施例, 参见图 19所示, 本发明实施例还提供了另一种宏基站, 包括: 第一控制模块 191 , 用于在接收到源宏基站发送的切换请求后, 进行接纳判决, 其中, 切换请求中携带用于指示 UE处于承载分离的状态信息;
第二控制模块 192, 用于在确定自身允许接纳 UE, 且自身支持承载分离时, 进行 UE 在本基站中的底层配置, 并向源宏基站返回切换请求响应, 切换请求响应中携带承载分离 支持确认消息及用于指示 UE进行切换的切换命令。 进一步, 若自身为源宏基站选定的切换目标宏基站; 第二控制模块 192具体用于: 在确定自身允许接纳 UE之后, 且在向源宏基站返回切换请求响应之前, 与本地节点 建立专用承载连接, 并通过专用承载连接将本基站分别针对 UE当前在本地节点上的承载 的配置信息及本地节点的无线链路的配置信息和 /或服务小区配置信息发送给本地节点。
进一步, 第二控制模块 192还用于:
在接收到 UE发送的传输恢复请求后, 向本地节点发送第一指示信息, 以指示本地节 点恢复向 UE发送数据及接收 UE发送的数据, 传输恢复请求是 UE在完成与本地节点的 同步过程后发送的。
进一步, 若自身为重建目标宏基站, 重建目标宏基站与切换失败的目标宏基站为同一 个基站; 第二控制模块 192具体用于:
在完成与 UE的重建过程后, 根据用于指示 UE处于承载分离的状态信息以及 UE当 前所在的本地节点信息, 和 /或 UE当前在本地节点上的承载信息, 进行相应处理。
进一步, 第二控制模块 192具体用于:
向本地节点发送第二指示信息, 以通知本地节点将该本地节点与 UE之间待发送的数 据前转到本基站; 或者向本地节点发起承载分离过程, 更新本地节点的资源配置, 并在完 成承载分离过程后, 通知本地节点恢复向 UE发送数据及接收 UE发送的数据。
进一步, 第二控制模块 192还用于:
在接收到 UE发送的用于指示自身与本地节点同步失败的第五告知信息后, 重新选择 用于进行承载分离的本地节点, 并将第五告知信息发送给源宏基站, 以指示源宏基站通知 同步失败的本地节点释放与 UE相关的承载配置以及通知同步失败的本地节点将自身緩存 的与 UE相关的数据发送给本基站; 或者
在接收到 UE发送的第五告知信息后, 重新选择用于进行承载分离的本地节点, 并通 知同步失败的本地节点释放与 UE相关的承载配置以及通知同步失败的本地节点将自身緩 存的与 UE相关的数据发送给本基站; 或者
在接收到本地节点发送的自身与 UE同步失败的通知后, 重新选择用于进行承载分离 的本地节点, 并通知同步失败的本地节点释放与 UE相关的承载配置以及通知同步失败的 本地节点将自身緩存的与 UE相关的数据发送给本基站。
进一步, 第二控制模块 192还用于:
若切换后, UE在本基站上的部分承载需要转移到本地节点, 在向核心网发送的路径 转换请求中携带需要转移的承载的传输地址;
若切换后, UE在本地节点上的部分承载需要转移到本基站, 在向核心网发送的路径 转换请求中携带需要转移的承载的传输地址。
本发明实施例还提供了另一种宏基站,如图 20所示,包括处理器和数据收发接口 201 , 其中 202:
所述处理器 201被配置为用于,在接收到源宏基站发送的切换请求后,进行接纳判决, 其中, 切换倚求中携带用于指示 UE处于承载分离的状态信息; 在确定自身允许接纳 UE, 且自身支持承载分离时, 进行 UE在本基站中的底屋配置, 并向源宏基站返回切换请求响 应, 切换请求响应中携带承载分离支持确认消息及用于指示 UE进行切换的切换命令; 所述数据收发接口 202用于在所述处理器的控制下收发数据。
基于上述实施例, 参见图 21所示, 本发明实施例还提供了一种用户设备, 包括: 第一管理模块 211 , 用于在接收到源宏基站发送的切换命令, 且切换命令中携带承载 分离支持确认消息后, 停止向源宏基站发送数据且停止接收源宏基站发送的数据, 并向切 换目标宏基站发起同步过程, 其中, UE停止向本地节点发送数据且停止接收本地节点发 送的数据, 或维持向本地节点发送数据及接收本地节点发送的数据;
第二管理模块 212, 用于在完成与切换目标宏基站的同步过程后, 分别与切换目标宏 基站及本地节点进行数据传输。
进一步, 若第一管理模块 211接收到源宏基站发送的切换命令后, 停止向本地节点发 送数据且停止接收该本地节点发送的数据; 第二管理模块 192还用于:
向本地节点发送第二告知信息,以指示该本地节点停止向 UE发送数据且停止接收 UE 发送的数据; 或者向源宏基站发送第三告知信息, 以指示源宏基站通知本地节点停止向该 UE发送数据且停止接收该 UE发送的数据。
进一步, 第二管理模块 212还用于:
在接收到源宏基站发送的第三通知信息后, 确定网络侧切换失败, 并向重建 标宏基 站发起重建过程; 或者
在确定与切换目标宏基站的随机接入 RA失败后, 确定网络侧切换失败, 并向重建目 标宏基站发起重建过程; 或者
在向切换目标宏基站发起同步过程时, 启动已配置的第三定时器, 若在第三定时器超 时时, 未收到切换目标宏基站的反馈信息, 确定网络侧切换失败, 并向重建目标宏基站发 起重建过程;
其中, 重建目标宏基站与切换失败的目标宏基站为同一个基站。
进一步, 若第一管理模块 211在接收到源宏基站发送的切换命令后, 停止向本地节点 发送数据且停止接收该本地节点发送的数据; 第二管理模块 212还用于:
在确定网络侧切换失败之后, 向本地节点发送用于指示本地节点网络侧切换失败的第 一告知信息;
若第一管理模块 211在接收到源宏基站发送的切换命令后, 维持向本地节点发送数据 及接收该本地节点发送的数据; 第二管理模块 212还用于: 在确定网络侧切换失败后, 停止向本地节点发送数据且停止接收本地节点发送的数 据; 并向本地节点发送用于指示本地节点网络侧切换失败的第一告知信息。
进一步, 第二管理模块 212具体用于:
在确定网络側切换失败后, 向重建目标宏基站发起重建过程时, 将除信令无线承载 SRB0之外且未分离到本地节点的承载挂起, 并执行小区选择过程; 若重建过程成功, 分 别与重建目标宏基站及本地节点进行数据传输; 若重建过程失败, 停止向本地节点发送数 据且停止接收该本地节点发送的数据, 释放自身与重建目标宏基站的 RRC连接, 并进入 空闲状态。
进一步, 第二管理模块 212具体用于:
若重建过程失败, 向本地节点发送用于指示本地节点重建过程失败的第四告知信息。 进一步, 若第一管理模块 211在接收到切换命令后, 停止向本地节点发送数据且停止 接收该本地节点发送的数据; 第二管理模块 212还用于:
在完成与切换目标宏基站的同步过程后, 向本地节点发起同步过程; 若与本地节点同 步成功, 向本地节点发送数据及接收该本地节点发送的数据, 并向目标宏基站发送传输恢 复请求, 以指示 标宏基站通知本地节点恢复向自身发送数据及接收自身发送的数据; 若 与本地节点同步失败, 向切换目标宏基站发送用于指示自身与本地节点同步失败的第五告 知信息。
进一步, 若第一管理模块 211在接收到切换命令后, 维持向本地节点发送数据及接收 该本地节点发送的数据; 第二管理模块 212还用于:
使用源宏基站配置的安全参数及切换命令中携带的切换目标宏基站配置的安全参数, 分别对本地节点发送的数据进行解码; 在使用切换目标宏基站配置的安全参数成功解码 后, 中止使用源宏基站配置的安全参数进行解码。
本发明实施例还提供了一种用户设备, 如图 22所示, 包括处理器 221和数据收发接 口 222, 其中:
所述处理器 221被配置为用于, 在接收到源宏基站发送的切换命令, 且切换命令中携 带承载分离支持确认消息后, 停止向源宏基站发送数据且停止接收源宏基站发送的数据, 并向切换目标宏基站发起同步过程, 其中, UE停止向本地节点发送数据且停止接收本地 节点发送的数据, 或维持向本地节点发送数据及接收本地节点发送的数据; 在完成与切换 目标宏基站的同步过程后, 分别与切换目标宏基站及本地节点进行数据传输;
所述数据收发接口 222用于在所述处理器的控制下收发数据。
基于上述实施例, 参见图 23所示, 本发明实施例还提供了一种本地节点, 包括: 接收模块 231 , 用于接收源宏基站或切换目标宏基站发送的配置信息;
传输模块 232, 用于使用配置信息中携带的切换目标宏基站配置的安全参数, 分别与 UE及切换目标宏基站进行数据传输;
其中, 在切换过程中, 传输模块 232停止向 UE发送数据且停止接收该 UE发送的数 据, 或维持向 UE发送数据及接收该 UE发送的数据。
进一步, 若接收模块 231接收到源宏基站发送的第一通知信息或 UE发送的第二告知 信息, 传输模块 232具体用于: 停止向 UE发送数据且停止接收该 UE发送的数据;
在接收模块 231接收到切换目标宏基站发送的第一指示信息后, 传输模块 202具体用 于: 恢复向 UE发送数据及接收该 UE发送的数据。
进一步, 若接收模块 231接收到源宏基站发送的第二通知信息, 且第二通知信息为指 示本地节点停止向 UE发送数据且停止接收该 UE发送的数据; 传输模块 202具体用于: 停止向 UE发送数据且停止接收该 UE发送的数据, 并释放与 UE相关的承载配置;
若接收模块 231接收到源宏基站发送的第二通知信息, 且第二通知信息为指示网络侧 切换失败; 传输模块 232具体用于: 维持向 UE发送数据及接收该 UE发送的数据, 并开 启第四定时器; 在第四定时器超时时, 还未收到重建目标宏基站的指示, 停止向 UE发送 数据且停止接收该 UE发送的数据, 并释放与该 UE相关的资源配置, 其中, 重建目标宏 基站与切换失败的目标宏基站为同一个基站;
若接收模块 231接收到 UE发送的第一告知信息;传输模块 202具体用于:释放与 UE 相关的承载配置。
进一步, 传输模块 232还用于:
緩存与 UE相关且未进行处理或未发送的数据。
进一步, 若接收模块 231接收到重建 S标宏基站发送的第二指示信息, 传输模块 232 具体用于: 将自身与 UE之间待发送的数据前转到重建目标宏基站;
若重建目标宏基站发起承载分离过程,传输模块 232具体用于: 更新自身的资源配置, 并在完成与重建目标宏基站的承载分离过程后, 恢复向 UE发送数据及接收该 UE发送的 数据。
进一步, 若接收模块 231接收到源宏基站发送的用于指示启动第二定时器的通知, 传 输模块 232具体用于: 启动第二定时器; 若在第二定时器超时时, 未完成与 UE的同步过 程或与 UE的信道质量未恢复, 确定自身与 UE的同步失败; 通知切换目标宏基站自身与 UE同步失败。
本发明实施例还提供了一种本地节点, 如图 24所示, 包括处理器 241和数据收发接 口 243 , 其中:
所述处理器 241被配置为用于, 接收源宏基站或切换目标宏基站发送的配置信息; 使 用配置信息中携带的切换目标宏基站配置的安全参数, 分别与 UE及切换目标宏基站进行 数据传输; 其中, 在切换过程中, 停止向 UE发送数据且停止接收该 UE发送的数据, 或 维持向 UE发送数据及接收该 UE发送的数据;
所述数据收发接口 242用于在所述处理器的控制下收发数据。
基于上述实施例, 参见图 25所示, 本发明实施例还提供了一种通信系统, 包括: 源宏基站 251 , 用于在确定需要进行用户设备 UE的切换过程后, 向各备选目标宏基 站发送切换请求, 切换请求中携带用于指示 UE处于承载分离的状态信息以及 UE当前所 在的本地节点信息, 和 /或 UE当前在本地节点上的承载信息; 以及从返回切换请求响应的 备选目标宏基站中, 为 UE选定进行切换的目标宏基站, 将切换目标宏基站返回的切换请 求响应中携带的切换命令发送给 UE,并停止向 UE发送数据且停止接收该 UE发送的数据; 切换目标宏基站 252, 用于在接收到源宏基站发送的切换请求后, 进行接纳判决; 在 确定自身允许接纳 UE, 且自身支持承载分离时, 进行 UE在本基站中的底层配置, 并向源 宏基站返回切换请求响应, 切换请求响应中携带承载分离支持确认消息及用于指示 UE进 行切换的切换命令;
UE253 , 用于在接收到源宏基站发送的切换命令, 且切换命令中携带承载分离支持确 认消息后, 停止向源宏基站发送数据且停止接收源宏基站发送的数据, 并向切换目标宏基 站发起同步过程, 其中, UE停止向本地节点发送数据且停止接收本地节点发送的数据, 或维持向本地节点发送数据及接收本地节点发送的数据; 以及在完成与切换目标宏基站的 同步过程后, 分别与切换目标宏基站及本地节点进行数据传输;
本地节点 254, 用于接收源宏基站或切换目标宏基站发送的配置信息; 以及使用配置 信息中携带的切换目标宏基站配置的安全参数, 分别与 UE及切换目标宏基站进行数据传 输; 其中, 在切换过程中, 本地节点停止向 UE发送数据且停止接收该 UE发送的数据, 或维持向 UE发送数据及接收该 UE发送的数据。
本发明实施例针对承载分离场景, 提出了处于承载分离状态的 UE从源宏基站切换到 目标宏基站的具体实现方案, 以及在进行切换过程中数据的处理方案, 从而解决了现有协 议中还没有针对承载分离场景下, UE在宏基站间切换时的具体实现方案以及在切换过程 中数据传输的处理方案的问题。
本发明实施例实现了承载切换功能, 进一步达到了用户面承载及控制面承载分离及汇 聚的目的; 由于降低了用户设备进行控制面切换的次数, 从而在 E-UTRAN的网络架构中 用户设备的切换频率和次数增加情况下, 降低了用户设备在进行切换时发生通信中断的风 险。
本领域内的技术人员应明白, 本发明的实施例可提供为方法、 系统、 或计算机程序产 品。 因此, 本发明可釆用完全硬件实施例、 完全软件实施例、 或结合软件和硬件方面的实 施例的形式。 而且, 本发明可釆用在一个或多个其中包含有计算机可用程序代码的计算机 可用存储介质(包括但不限于磁盘存储器、 CD-ROM、 光学存储器等)上实施的计算机程 序产品的形式。
本发明是参照根据本发明实施例的方法、 设备(系统)、 和计算机程序产品的流程图 和 /或方框图来描述的。 应理解可由计算机程序指令实现流程图和 /或方框图中的每一流 程和 /或方框、 以及流程图和 /或方框图中的流程和 /或方框的结合。 可提供这些计算机 程序指令到通用计算机、 专用计算机、 嵌入式处理机或其他可编程数据处理设备的处理器 以产生一个机器, 使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用 于实现在流程图一个流程或多个流程和 /或方框图一个方框或多个方框中指定的功能的 装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方 式工作的计算机可读存储器中, 使得存储在该计算机可读存储器中的指令产生包括指令装 置的制造品, 该指令装置实现在流程图一个流程或多个流程和 /或方框图一个方框或多个 方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上, 使得在计算机 或其他可编程设备上执行一系列操作步驟以产生计算机实现的处理, 从而在计算机或其他 可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和 /或方框图一个 方框或多个方框中指定的功能的步驟。
尽管已描述了本发明的优选实施例, 但本领域内的技术人员一旦得知了基本创造性概 念, 则可对这些实施例作出另外的变更和修改。 所以, 所附权利要求意欲解释为包括优选 实施例以及落入本发明范围的所有变更和修改。
显然, 本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和 范围。这样,倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内, 则本发明也意图包含这些改动和变型在内。

Claims

权 利 要 求
1、 一种承载分离场景下进行切换的方法, 其特征在于, 该方法包括:
源宏基站在确定需要进行用户设备 UE的切换过程后, 向各备选目标宏基站发送切换 请求, 所述切换请求中携带用于指示所述 UE处于承载分离的状态信息以及所述 UE当前 所在的本地节点信息, 和 /或 UE当前在本地节点上的承载信息;
所述源宏基站从返回切换请求响应的备选目标宏基站中, 为所述 UE选定进行切换的 标宏基站 , 将切换目标宏基站返回的切换请求响应中携带的切换命令发送给所述 UE, 并停止向所述 UE发送数据且停止接收该 UE发送的数据。
2、 如权利要求 1 所述的方法, 其特征在于, 所述源宏基站接收到所述切换目标宏基 站返回的切换请求响应之后, 所述方法还包括:
所述源宏基站将所述切换请求响应中携带的所述切换目标宏基站分别针对所述 UE当 前在所述本地节点上的承载的配置信息及所述本地节点的无线链路的配置信息和 /或服务 小区配置信息发送给所述本地节点。
3、 如权利要求 1所述的方法, 其特征在于, 所述方法还包括:
所述源宏基站在确定所述 UE在接收到所述切换命令后停止向所述本地节点发送数据 且停止接收该本地节点发送的数据之后, 向所述本地节点发送第一通知信息, 以通知所述 本地节点停止向所述 UE发送数据且停止接收该 UE发送的数据。
4、 如权利要求 1 所述的方法, 其特征在于, 在所述源宏基站接收到所述备选目标宏 基站返回的切换请求响应或在所述源宏基站选定了所述切换目标宏基站之后, 所述方法还 包括:
所述源宏基站启动第一定时器;
若在所述第一定时器超时时, 所述源宏基站还未收到所述切换目标宏基站发送的 UE 上下文释放指示, 确定网络侧切换失败;
所述源宏基站向所述本地节点发送第二通知信息, 以指示所述本地节点根据所述第二 通知信息进行相应处理, 其中, 所述第二通知信息为指示所述本地节点停止向所述 UE发 送数据且停止接收该 UE发送的数据, 或者所述第二通知信息为指示网络侧切换失败; 以 及
所述源宏基站向所述 UE发送用于指示所述 UE网络侧切换失败的第三通知信息, 以 指示所述 UE在接收到所述第三通知信息后执行重建过程, 其中重建目标宏基站与切换失 败的目标宏基站为同一个基站。
5、 如权利要求 1所述的方法, 其特征在于, 所述方法还包括: 所述源宏基站在确定所述 UE在接收到所述切换命令后停止向所述本地节点发送数据 且停止接收该本地节点发送的数据之后, 向所述本地节点发送第四通知信息, 以通知所述 本地节点开启用于判断本节点与所述 UE是否同步成功的第二定时器。
6、 如权利要求 1所述的方法, 其特征在于, 还包括:
源基站接收目标宏基站根据接纳测量判定重新为 UE选择本地节点后发送的本地节点 变更指示, 所述源宏基站接收的目标宏基站发送的切换请求响应中, 包括所述目标宏基站 针对 UE的承载配置信息、 无线资源配置信息, 以及分离承载的更新的本地节点信息、 分 离在更新的本地节点上的承载配置信息、 无线资源配置信息;
所述源宏基站将目标宏基站通知的切换倚求响应通知给原本地节点。
7、 一种承载分离场景下进行切换的方法, 其特征在于, 该方法包括:
备选目标宏基站在接收到源宏基站发送的切换请求后, 进行接纳判决, 其中, 所述切 换请求中携带用于指示 UE处于承载分离的状态信息;
所述备选目标宏基站在确定自身允许接纳所述 UE且自身支持承载分离时, 进行所述 UE在本基站中的底屋配置, 并向所述源宏基站返回切换请求响应消息, 所述切换请求响 应中携带承载分离支持确认消息及用于指示所述 UE进行切换的切换命令。
8、 如权利要求 7 所述的方法, 其特征在于, 若所述备选目标宏基站为所述源宏基站 选定的切换目标宏基站, 所述切换目标宏基站在确定自身允许接纳所述 UE之后, 且在向 所述源宏基站返回切换请求响应之前, 所述方法还包括:
所述切换目标宏基站与本地节点建立专用承载连接, 并通过所述专用承载连接将本基 站分别针对所述 UE当前在所述本地节点上的承载的配置信息及所述本地节点的无线链路 的配置信息和 /或服务小区配置信息发送给所述本地节点。
9、 如权利要求 7所述的方法, 其特征在于, 所述方法还包括:
所述切换目标宏基站在接收到所述 UE发送的传输恢复请求后, 向本地节点发送第一 指示信息, 以指示所述本地节点恢复向所述 UE发送数据及接收该 UE发送的数据, 所述 传输恢复请求是所述 UE在完成与所述本地节点的同步过程后发送的。
10、 如权利要求 7所述的方法, 其特征在于, 若所述备选目标宏基站为重建目标宏基 站, 所述方法还包括:
所述重建目标宏基站在完成与所述 UE的重建过程后, 根据用于指示所述 UE处于承 载分离的状态信息以及所述 UE当前所在的本地节点信息, 和 /或 UE当前在本地节点上的 承载信息, 进行相应处理;
其中, 所述重建目标宏基站与切换失败的目标宏基站为同一个基站。
11、 如权利要求 10所述的方法, 其特征在于, 所述重建目标宏基站从源宏基站发送 的切换倚求中获取所述状态信息以及所述 UE当前所在的本地节点信息, 和 /或 UE当前在 所述本地节点上的承载信息; 或者
所述 UE在与所述重建目标宏基站进行重建的过程中或完成重建后, 向所述重建目标 宏基站上报所述状态信息以及自身当前所在的本地节点信息, 和 /或 UE当前在所述本地节 点上的承载信息。
12、 如权利要求 10所述的方法, 其特征在于, 所述重建目标宏基站进行相应的处理, 具体包括:
所述重建目标宏基站向所述本地节点发送第二指示信息, 以通知所述本地节点将该本 地节点与所述 UE之间待发送的数据前转到本基站; 或者
所述重建目标宏基站向所述本地节点发起承载分离过程, 更新所述本地节点的资源配 置,并在完成承载分离过程后,通知所述本地节点恢复向所述 UE发送数据及接收所述 UE 发送的数据。
13、 如权利要求 7所述的方法, 其特征在于, 所述方法还包括:
所述目标宏基站在接收到所述 UE发送的用于指示自身与本地节点同步失败的第五告 知信息后, 重新选择用于进行承载分离的本地节点, 并将所述第五告知信息发送给所述源 宏基站, 以指示所述源宏基站通知同步失败的本地节点释放与所述 UE相关的承载配置以 及通知同步失败的本地节点将自身緩存的与所述 UE相关的数据发送给本基站; 或者
所述目标宏基站在接收到所述 UE发送的第五告知信息后, 重新选择用于进行承载分 离的本地节点, 并通知同步失败的本地节点释放与所述 UE相关的承载配置以及通知同步 失败的本地节点将自身緩存的与所述 UE相关的数据发送给本基站; 或者
所述目标宏基站在接收到本地节点发送的自身与所述 UE同步失败的通知后, 重新选 择用于进行承载分离的本地节点, 并通知同步失败的本地节点释放与所述 UE相关的承载 配置以及通知同步失败的本地节点将自身緩存的与所述 UE相关的数据发送给本基站。
14、 如权利要求 7所述的方法, 其特征在于, 所述方法还包括:
若切换后, 所述 UE在所述切换目标宏基站上的部分承载需要转移到本地节点, 所述 切换目标宏基站在向核心网发送的路径转换请求中携带需要转移的承载的传输地址;
若切换后, 所述 UE在本地节点上的部分承载需要转移到所述切换目标宏基站, 所述 切换目标宏基站在向核心网发送的路径转换请求中携带需要转移的承载的传输地址。
15、 如权利要求 7所述的方法, 其特征在于, 还包括:
备选目标宏基站根据接纳测量判定, 重新为 UE选择本地节点;
备选目标宏基站向更新的本地节点发送切换接纳请求,该切换接纳请求包括 UE标识、
UE在原本地节点的承载配置信息、 无线资源配置信息及原本地节点的信息, 所述原本地 节点的信息包括原本地节点标识、 原本地节点上的承载配置信息及无线资源配置信息; 目标宏基站将针对 UE的承载配置信息、 无线资源配置信息, 以及更新的本地节点信 息、 分离在更新的本地节点上的承载配置信息、 无线资源配置信息, 通知给源宏基站。
16、 一种承载分离场景下进行切换的方法, 其特征在于, 该方法包括:
UE在接收到源宏基站发送的切换命令, 且所述切换命令中携带承载分离支持确认消 息后, 停止向所述源宏基站发送数据且停止接收所述源宏基站发送的数据, 并向切换目标 宏基站发起同步过程, 其中, 所述 UE停止向本地节点发送数据且停止接收所述本地节点 发送的数据, 或维持向本地节点发送数据及接收所述本地节点发送的数据;
所述 UE在完成与所述切换目标宏基站的同步过程后, 分别与所述切换目标宏基站及 所述本地节点进行数据传输。
17、 如权利要求 16所述的方法, 其特征在于, 若所述 UE在接收到源宏基站发送的切 换命令后, 停止向所述本地节点发送数据且停止接收所述本地节点发送的数据, 所述方法 还包括:
所述 UE向所述本地节点发送第二告知信息, 以指示所述本地节点停止向该 UE发送 数据且停止接收该 UE发送的数据; 或者所述 UE向所述源宏基站发送第三告知信息, 以 指示所述源宏基站通知所述本地节点停止向该 UE发送数据且停止接收该 UE发送的数据。
18、 如权利要求 16所述的方法, 其特征在于, 所述方法还包括:
所述 UE在接收到所述源宏基站发送的第三通知信息后, 确定网络侧切换失败, 并向 重建目标宏基站发起重建过程; 或者
所述 UE在确定与所述切换目标宏基站的随机接入 RA失败后,确定网络侧切换失败, 并向重建目标宏基站发起重建过程; 或者
所述 UE在向所述切换司标宏基站发起同步过程时, 启动已配置的第三定时器, 若在 所述第三定时器超时时, 未收到所述切换目标宏基站的反馈信息, 确定网络侧切换失败, 并向重建目标宏基站发起重建过程;
其中, 所述重建目标宏基站与切换失败的目标宏基站为同一个基站。
19、 如权利要求 18所述的方法, 其特征在于, 若 UE在接收到源宏基站发送的切换命 令后, 停止向所述本地节点发送数据且停止接收所述本地节点发送的数据, 所述方法还包 括:
在确定网络侧切换失败之后, 所述 UE向所述本地节点发送用于指示所述本地节点网 络侧切换失败的第一告知信息;
若 UE在接收到源宏基站发送的切换命令后, 维持向所述本地节点发送数据及接收所 述本地节点发送的数据, 所述方法还包括:
在确定网络侧切换失败之后, 所述 UE停止向所述本地节点发送数据且停止接收所述 本地节点发送的数据, 并向所述本地节点发送所述第一告知信息。
20、 如权利要求 18所述的方法, 其特征在于, 所述 UE向所述重建目标宏基站发起重 建过程, 具体包括:
所述 UE将除信令无线承载 SRB0之外且未分离到所述本地节点的承载挂起, 并执行 小区选择过程;
若所述重建过程成功, 所述 UE分别与所述重建目标宏基站及所述本地节点进行数据 传输;
若所述重建过程失败, 所述 UE停止向所述本地节点发送数据且停止接收该本地节点 发送的数据, 释放自身与所述重建目标宏基站的 RRC连接, 并进入空闲状态。
21、 如权利要求 20所述的方法, 其特征在于, 若所述重建过程失败, 所述方法还包 括:
所述 UE向所述本地节点发送用于指示所述本地节点重建过程失败的第四告知信息。
22、 如权利要求 16所述的方法, 其特征在于, 若所述 UE在接收到所述切换命令后, 停止向所述本地节点发送数据且停止接收该本地节点发送的数据, 所述方法还包括: 所述 UE在完成与所述切换目标宏基站的同步过程后,向所述本地节点发起同步过程; 若与所述本地节点同步成功, 所述 UE恢复向所述本地节点发送数据及接收该本地节 点发送的数据, 并向所述 标宏基站发送传输恢复请求, 以指示所述 标宏基站通知所述 本地节点恢复向该 UE发送数据及接收该 UE发送的数据;
若与所述本地节点同步失败, 所述 UE向所述切换目标宏基站发送用于指示自身与所 述本地节点同步失败的第五告知信息。
23、 如权利要求 16所述的方法, 其特征在于, 若所述 UE在接收到所述切换命令后, 维持向所述本地节点发送数据及接收该本地节点发送的数据, 所述方法还包括:
所述 UE使用所述源宏基站配置的安全参数及所述切换命令中携带的所述切换目标宏 基站配置的安全参数, 分别对所述本地节点发送的数据进行解码;
所述 UE在使用所述切换目标宏基站配置的安全参数成功解码后, 中止使用所述源宏 基站配置的安全参数进行解码。
24、 一种承载分离场景下进行切换的方法, 其特征在于, 该方法包括:
本地节点接收源宏基站或切换目标宏基站发送的配置信息;
所述本地节点使用所述配置信息中携带的切换目标宏基站配置的安全参数,分别与 UE 及所述切换目标宏基站进行数据传输;
其中, 在切换过程中, 所述本地节点停止向所述 UE发送数据且停止接收该 UE发送 的数据, 或维持向所述 UE发送数据及接收该 UE发送的数据。
25、 如权利要求 24所述的方法, 其特征在于, 所述方法还包括:
所述本地节点在接收到所述源宏基站发送的第一通知信息或所述 UE发送的第二告知 信息后, 停止向所述 UE发送数据且停止接收该 UE发送的数据; 以及 所述本地节点在接收到所述切换目标宏基站发送的第一指示信息后, 恢复向所述 UE 发送数据及接收该 UE发送的数据。
26、 如权利要求 24所述的方法, 其特征在于, 所述方法还包括:
若接收到所述源宏基站发送的第二通知信息, 且所述第二通知信息为指示所述本地节 点停止向所述 UE发送数据且停止接收该 UE发送的数据, 所述本地节点停止向所述 UE 发送数据且停止接收该 UE发送的数据, 并释放与该 UE相关的承载配置;
若接收到所述源宏基站发送的第二通知信息, 且所述第二通知信息为指示网络侧切换 失败, 所述本地节点维持向所述 UE发送数据及接收该 UE发送的数据, 并开启第四定时 器; 所述本地节点在所述第四定时器超时时, 还未收到重建目标宏基站的指示, 停止向所 述 UE发送数据且停止接收该 UE发送的数据, 并释放与该 UE相关的资源配置, 其中, 所述重建目标宏基站与切换失败的目标宏基站为同一个基站;
若接收到所述 UE发送的第一告知信息, 所述本地节点释放与所述 UE相关的承载配 置。
27、 如权利要求 26所述的方法, 其特征在于, 所述方法还包括:
所述本地节点緩存与所述 UE相关且未进行处理或未发送的数据。
28、 如权利要求 24所述的方法, 其特征在于, 所述方法还包括:
若接收到重建目标宏基站发送的第二指示信息, 所述本地节点将自身与所述 UE之间 待发送的数据前转到所述重建目标宏基站;
若所述重建目标宏基站发起承载分离过程, 所述本地节点更新自身的资源配置, 并在 完成与所述重建目标宏基站的承载分离过程后, 恢复向所述 UE发送数据及接收该 UE发 送的数据。
29、 如权利要求 24所述的方法, 其特征在于, 所述方法还包括:
所述本地节点在接收到所述源宏基站发送的用于指示启动第二定时器的通知后, 启动 所述第二定时器;
若在所述第二定时器超时时,所述本地节点未完成与所述 UE的同步过程或与所述 UE 的信道质量未恢复, 确定自身与所述 UE的同步失败;
所述本地节点通知所述切换目标宏基站本节点同步失败。
30、 如权利要求 24所述的方法, 其特征在于, 所述方法还包括:
所述本地节点接收切换目标宏基站根据接纳测量判定重新为 UE选择所述本地节点后 发送的切换接纳请求,所述切换接纳请求中包括 UE标识、 UE在原本地节点的承载配置信 息、 无线资源配置信息;
根据切换目标宏基站的切换接纳请求, 进行接纳判决和切换接纳请求消息反馈, 切换 接纳请求消息包括 UE标识、 UE在该本地节点接纳的承载配置信息、 无线资源配置信息; 接收从原本地节点或源宏基站前转的承载在原本地节点的未被确认或传输的承载的 用户数据。
31、 一种宏基站, 其特征在于, 该宏基站包括:
第一处理模块, 用于在确定需要进行用户设备 UE的切换过程后, 向各备选目标宏基 站发送切换请求, 所述切换请求中携带用于指示所述 UE处于承载分离的状态信息以及所 述 UE当前所在的本地节点信息, 和 /或 UE当前在本地节点上的承载信息;
第二处理模块, 用于从返回切换请求响应的备选目标宏基站中, 为所述 UE选定进行 切换的目标宏基站, 将切换目标宏基站返回的切换请求响应中携带的切换命令发送给所述 UE , 并停止向所述 UE发送数据且停止接收该 UE发送的数据。
32、 如权利要求 31所述的宏基站, 其特征在于, 所述第二处理模块还用于: 将所述切换请求响应中携带的所述切换目标宏基站分别针对所述 UE当前在所述本地 节点上的承载的配置信息及所述本地节点的无线链路的配置信息和 /或服务小区配置信息 发送给所述本地节点。
33、 如权利要求 31所述的宏基站, 其特征在于, 所述第二处理模块具体用于: 在确定所述 UE在接收到所述切换命令后停止向所述本地节点发送数据且停止接收该 本地节点发送的数据后, 向所述本地节点发送第一通知信息, 以通知所述本地节点停止向 所述 UE发送数据且停止接收该 UE发送的数据。
34、 如权利要求 31所述的宏基站, 其特征在于, 所述第二处理模块还用于: 在接收到所述备选目标宏基站返回的切换请求响应或选定了所述切换目标宏基站之 后, 启动第一定时器; 在所述第一定时器超时时, 若还未收到所述切换目标宏基站发送的 UE上下文释放指示, 确定网络侧切换失败; 向所述本地节点发送第二通知信息, 以指示 所述本地节点根据所述第二通知信息进行相应处理;以及向所述 UE发送用于指示所述 UE 网络侧切换失败的第三通知信息, 以指示所述 UE在接收到所述第三通知信息后执行重建 过程;
其中, 所述第二通知信息为指示所述本地节点停止向所述 UE发送数据且停止接收该
UE发送的数据, 或者所述第二通知信息为指示网络侧切换失败; 重建目标宏基站与切换 失败的目标宏基站为同一个基站。
35、 如权利要求 31所述的宏基站, 其特征在于, 所述第二处理模块还用于: 在确定所述 UE在接收到所述切换命令后停止向所述本地节点发送数据且停止接收该 本地节点发送的数据之后, 向所述本地节点发送第四通知信息, 以通知所述本地节点开启 用于判断本节点与所述 UE是否同步成功的第二定时器。
36、 如权利要求 31所述的宏基站, 其特征在于, 所述第二处理模块还用于: 接收目标宏基站根据接纳测量判定重新为 UE选择本地节点后发送的本地节点变更指 示,所述源宏基站接收的目标宏基站发送的切换情求响应中,包括所述目标宏基站针对 UE 的承载配置信息、 无线资源配置信息, 以及分离承载的更新的本地节点信息、 分离在更新 的本地节点上的承载配置信息、 无线资源配置信息;
将目标宏基站通知的切换请求响应通知给原本地节点。
37、 一种宏基站, 其特征在于, 包括:
处理器, 被配置为用于在确定需要进行 UE的切换过程后, 向各备选目标宏基站发送 切换请求, 该切换请求中携带用于指示 UE处于承载分离的状态信息以及该 UE当前所在 的本地节点信息, 和 /或 UE当前在本地节点上的承载信息; 从返回切换请求响应的备选目 标宏基站中, 为该 UE选定进行切换的目标宏基站, 将切换目标宏基站返回的切换请求响 应中携带的切换命令发送给该 UE,并停止向该 UE发送数据且停止接收该 UE发送的数据; 数据收发接口, 用于在所述处理器的控制下收发数据。
38、 一种宏基站, 其特征在于, 该宏基站包括:
第一控制模块, 用于在接收到源宏基站发送的切换请求后, 进行接纳判决, 其中, 所 述切换倚求中携带用于指示 UE处于承载分离的状态信息;
第二控制模块, 用于在确定自身允许接纳所述 UE, 且自身支持承载分离时, 进行所 述 UE在本基站中的底层配置, 并向所述源宏基站返回切换请求响应, 所述切换请求响应 中携带承载分离支持确认消息及用于指示所述 UE进行切换的切换命令。
39、 如权利要求 38所述的宏基站, 其特征在于, 若自身为所述源宏基站选定的切换 目标宏基站; 所述第二控制模块具体用于:
在确定自身允许接纳 UE之后, 且在向所述源宏基站返回切换请求响应之前, 与本地 节点建立专用承载连接, 并通过所述专用承载连接将本基站分别针对所述 UE当前在所述 本地节点上的承载的配置信息及所述本地节点的无线链路的配置信息和 /或服务小区配置 信息发送给所述本地节点。
40、 如权利要求 38所述的宏基站, 其特征在于, 所述第二控制模块还用于: 在接收到所述 UE发送的传输恢复请求后, 向本地节点发送第一指示信息, 以指示所 述本地节点恢复向所述 UE发送数据及接收所述 UE发送的数据, 所述传输恢复请求是所 述 UE在完成与所述本地节点的同步过程后发送的。
41、 如权利要求 39所述的宏基站, 其特征在于, 若自身为重建目标宏基站, 所述重 建目标宏基站与切换失败的目标宏基站为同一个基站; 所述第二控制模块具体用于: 在完成与所述 UE的重建过程后, 根据用于指示所述 UE处于承载分离的状态信息以 及所述 UE当前所在的本地节点信息, 和 /或 UE当前在本地节点上的承载信息, 进行相应 处理。
42、 如权利要求 41所述的宏基站, 其特征在于, 所述第二控制模块具体用于: 向所述本地节点发送第二指示信息, 以通知所述本地节点将该本地节点与所述 UE之 间待发送的数据前转到本基站; 或者向所述本地节点发起承载分离过程, 更新所述本地节 点的资源配置, 并在完成承载分离过程后, 通知所述本地节点恢复向所述 UE发送数据及 接收所述 UE发送的数据。
43、 如权利要求 38所述的宏基站, 其特征在于, 所述第二控制模块还用于: 在接收到所述 UE发送的用于指示自身与本地节点同步失败的第五告知信息后, 重新 选择用于进行承载分离的本地节点, 并将所述第五告知信息发送给所述源宏基站, 以指示 所述源宏基站通知同步失败的本地节点释放与所述 UE相关的承载配置以及通知同步失败 的本地节点将自身緩存的与所述 UE相关的数据发送给本基站; 或者
在接收到所述 UE发送的第五告知信息后, 重新选择用于进行承载分离的本地节点, 并通知同步失败的本地节点释放与所述 UE相关的承载配置以及通知同步失败的本地节点 将自身緩存的与所述 UE相关的数据发送给本基站; 或者
在接收到本地节点发送的自身与所述 UE同步失败的通知后, 重新选择用于进行承载 分离的本地节点, 并通知同步失败的本地节点释放与所述 UE相关的承载配置以及通知同 步失败的本地节点将自身緩存的与所述 UE相关的数据发送给本基站。
44、 如权利要求 38所述的宏基站, 其特征在于, 所述第二控制模块还用于: 若切换后, 所述 UE在本基站上的部分承载需要转移到所述本地节点, 在向核心网发 送的路径转换请求中携带需要转移的承载的传输地址;
若切换后, 所述 UE在所述本地节点上的部分承载需要转移到本基站, 在向核心网发 送的路径转换请求中携带需要转移的承载的传输地址。
45、 如权利要求 38所述的宏基站, 其特征在于,
所述第一控制模块还用于根据接纳测量判定, 重新为 UE选择本地节点;
所述第二控制模块还用于:
向更新的本地节点发送切换接纳请求,该切换接纳请求包括 UE标识、 UE在原本地节 点的承载配置信息、 无线资源配置信息及原本地节点的信息, 所述原本地节点的信息包括 原本地节点标识、 原本地节点上的承载配置信息及无线资源配置信息;
将针对 UE的承载配置信息、 无线资源配置信息, 以及更新的本地节点信息、 分离在 更新的本地节点上的承载配置信息、 无线资源配置信息, 通知给源宏基站。
46、 一种宏基站, 其特征在于, 包括:
处理器, 被配置为用于在接收到源宏基站发送的切换请求后, 进行接纳判决, 其中, 切换请求中携带用于指示 UE处于承载分离的状态信息;在确定自身允许接纳 UE,且自身 支持承载分离时, 进行 UE在本基站中的底层配置, 并向源宏基站返回切换请求响应, 切 换倚求响应中携带承载分离支持确认消息及用于指示 UE进行切换的切换命令; 数据收发接口, 用于在所述处理器的控制下收发数据。
47、 一种用户设备, 其特征在于, 该用户设备包括:
第一管理模块, 用于在接收到源宏基站发送的切换命令, 且所述切换命令中携带承载 分离支持确认消息后, 停止向所述源宏基站发送数据且停止接收所述源宏基站发送的数 据, 并向切换目标宏基站发起同步过程, 其中, 所述 UE停止向本地节点发送数据且停止 接收所述本地节点发送的数据, 或维持向本地节点发送数据及接收所述本地节点发送的数 据;
第二管理模块, 用于在完成与所述切换目标宏基站的同步过程后, 分别与所述切换目 标宏基站及所述本地节点进行数据传输。
48、 如权利要求 47所述的用户设备, 其特征在于, 若所述第一管理模块接收到源宏 基站发送的切换命令后, 停止向所述本地节点发送数据且停止接收所述本地节点发送的数 据, 所述第二管理模块还用于:
向所述本地节点发送第二告知信息, 以指示所述本地节点停止向该 UE发送数据且停 止接收该 UE发送的数据; 或者向所述源宏基站发送第三告知信息, 以指示所述源宏基站 通知所述本地节点停止向该 UE发送数据且停止接收该 UE发送的数据。
49、 如权利要求 47所述的用户设备, 其特征在于, 在接收到所述源宏基站发送的第 三通知信息后, 确定网络侧切换失败, 并向重建目标宏基站发起重建过程; 或者
在确定与所述切换目标宏基站的随机接入 RA失败后, 确定网络侧切换失败, 并向重 建目标宏基站发起重建过程; 或者
在向所述切换目标宏基站发起同步过程时, 启动已配置的第三定时器, 若在所述第三 定时器超时时, 未收到所述切换目标宏基站的反馈信息, 确定网络侧切换失败, 并向重建 目标宏基站发起重建过程;
其中, 所述重建目标宏基站与切换失败的目标宏基站为同一个基站。
50、 如权利要求 49所述的用户设备, 其特征在于, 若所述第一管理模块在接收到源 宏基站发送的切换命令后, 停止向所述本地节点发送数据且停止接收所述本地节点发送的 数据, 所述第二管理模块还用于: 在确定网络侧切换失败之后, 向所述本地节点发送用于 指示所述本地节点网络侧切换失败的第一告知信息;
若所述第一管理模块在接收到源宏基站发送的切换命令后, 维持向所述本地节点发送 数据及接收所述本地节点发送的数据, 所述第二管理模块还用于: 在确定网络侧切换失败 之后, 停止向所述本地节点发送数据且停止接收所述本地节点发送的数据, 并向所述本地 节点发送所述第一告知信息。
51、 如权利要求 49所述的用户设备, 其特征在于, 所述第二管理模块具体用于: 在确定网络侧切换失败后, 向所述重建目标宏基站发起重建过程时, 将除信令无线承 载 SRBO之外且未分离到所述本地节点的承载挂起, 并执行小区选择过程; 若所述重建过 程成功, 分别与所述重建目标宏基站及本地节点进行数据传输; 若所述重建过程失败, 停 止向所述本地节点发送数据且停止接收该本地节点发送的数据, 释放自身与所述重建目标 宏基站的 RRC连接, 并进入空闲状态。
52、 如权利要求 51所述的用户设备, 其特征在于, 所述第二管理模块具体用于: 若所述重建过程失败, 向所述本地节点发送用于指示所述本地节点重建过程失败的第 四告知信息。
53、 如权利要求 47所述的用户设备, 其特征在于, 若所述第一管理模块在接收到所 述切换命令后, 停止向所述本地节点发送数据且停止接收该本地节点发送的数据; 所述第 二管理模块还用于:
在完成与所述切换目标宏基站的同步过程后, 向所述本地节点发起同步过程; 若与所 述本地节点同步成功, 向所述本地节点发送数据及接收该本地节点发送的数据, 并向所述 目标宏基站发送传输恢复请求, 以指示所述目标宏基站通知所述本地节点恢复向自身发送 数据及接收自身发送的数据; 若与所述本地节点同步失败, 向所述切换目标宏基站发送用 于指示自身与所述本地节点同步失败的第五告知信息。
54、 如权利要求 47所述的用户设备, 其特征在于, 若所述第一管理模块在接收到所 述切换命令后, 维持向所述本地节点发送数据及接收该本地节点发送的数据; 所述第二管 理模块还用于:
使用所述源宏基站配置的安全参数及所述切换命令中携带的所述切换目标宏基站配 置的安全参数, 分别对所述本地节点发送的数据进行解码; 在使用所述切换 标宏基站配 置的安全参数成功解码后, 中止使用所述源宏基站配置的安全参数进行解码。
55、 一种用户设备, 其特征在于, 包括:
处理器, 被配置为用于在接收到源宏基站发送的切换命令, 且切换命令中携带承载分 离支持确认消息后, 停止向源宏基站发送数据且停止接收源宏基站发送的数据, 并向切换 目标宏基站发起同步过程, 其中, UE停止向本地节点发送数据且停止接收本地节点发送 的数据, 或维持向本地节点发送数据及接收本地节点发送的数据; 在完成与切换目标宏基 站的同步过程后, 分别与切换目标宏基站及本地节点进行数据传输;
所述数据收发接口, 用于在所述处理器的控制下收发数据。
56、 一种本地节点, 其特征在于, 该本地节点包括:
接收模块, 用于接收源宏基站或切换目标宏基站发送的配置信息;
传输模块, 用于使用所述配置信息中携带的切换目标宏基站配置的安全参数, 分别与 所述 UE及所述切换目标宏基站进行数据传输;
其中, 在切换过程中, 所述传输模块停止向所述 UE发送数据且停止接收该 UE发送 的数据, 或维持向所述 UE发送数据及接收该 UE发送的数据。
57、 如权利要求 56所述的本地节点, 其特征在于, 若所述接收模块接收到所述源宏 基站发送的第一通知信息或所述 UE发送的第二告知信息, 所述传输模块具体用于: 停止 向所述 UE发送数据且停止接收该 UE发送的数据;
在所述接收模块接收到所述切换目标宏基站发送的第一指示信息后, 所述传输模块具 体用于: 恢复向所述 UE发送数据及接收该 UE发送的数据。
58、 如权利要求 56所述的本地节点, 其特征在于, 若所述接收模块接收到所述源宏 基站发送的第二通知信息且所述第二通知信息为指示至少停止向所述 UE发送数据且停止 接收该 UE发送的数据, 所述传输模块具体用于: 停止向所述 UE发送数据且停止接收该 UE发送的数据, 并释放与所述 UE相关的承载配置;
若所述接收模块接收到所述源宏基站发送的第二通知信息且所述第二通知信息为指 示网络侧切换失败, 所述传输模块具体用于: 维持向所述 UE发送数据及接收该 UE发送 的数据,并开启第四定时器;在所述第四定时器超时时,还未收到重建目标宏基站的指示, 停止向所述 UE发送数据且停止接收该 UE发送的数据, 并释放与该 UE相关的资源配置, 其中, 所述重建目标宏基站与切换失败的目标宏基站为同一个基站;
若所述接收模块接收到所述 UE发送的第一告知信息, 所述传输模块具体用于: 释放 与所述 UE相关的承载配置。
59、 如权利要求 58所述的本地节点, 其特征在于, 所述传输模块还用于: 緩存与所述 UE相关且未进行处理或未发送的数据。
60、 如权利要求 56所述的本地节点, 其特征在于, 若所述接收模块接收到重建目标 宏基站发送的第二指示信息, 所述传输模块具体用于: 将自身与所述 UE之间待发送的数 据前转到所述重建目标宏基站;
若所述重建目标宏基站发起承载分离过程, 所述传输模块具体用于: 更新自身的资源 配置, 并在完成与所述重建目标宏基站的承载分离过程后, 恢复向所述 UE发送数据及接 收该 UE发送的数据。
61、 如权利要求 56所述的本地节点, 其特征在于, 若所述接收模块接收到所述源宏 基站发送的用于指示启动第二定时器的通知, 所述传输模块具体用于:
启动所述第二定时器; 若在所述第二定时器超时时, 未完成与所述 UE的同步过程或 与所述 UE的信道质量未恢复, 确定自身与所述 UE的同步失败; 通知所述切换目标宏基 站自身与 UE同步失败。
62、 如权利要求 56所述的本地节点, 其特征在于,
所述接收模块还用于:所述本地节点接收切换目标宏基站根据接纳测量判定重新为 UE 选择所述本地节点后发送的切换接纳请求,所述切换接纳请求中包括 UE标识、 UE在原本 地节点的承载配置信息、 无线资源配置信息;
所述传输模块还用于:
根据切换目标宏基站的切换接纳请求, 进行接纳判决和切换接纳请求消息反馈, 切换 接纳请求消息包括 UE标识、 UE在该本地节点接纳的承载配置信息、 无线资源配置信息; 接收从原本地节点或源宏基站前转的承载在原本地节点的未被确认或传输的承载的 用户数据。
63、 一种本地节点, 其特征在于, 包括:
处理器, 被配置为用于接收源宏基站或切换目标宏基站发送的配置信息; 使用配置信 息中携带的切换目标宏基站配置的安全参数,分别与 UE及切换目标宏基站进行数据传输; 其中, 在切换过程中, 停止向 UE发送数据且停止接收该 UE发送的数据, 或维持向 UE 发送数据及接收该 UE发送的数据;
数据收发接口, 用于在所述处理器的控制下收发数据。
64、 一种通信系统, 其特征在于, 该通信系统包括:
源宏基站, 用于在确定需要进行用户设备 UE的切换过程后, 向各备选目标宏基站发 送切换请求,所述切换请求中携带用于指示所述 UE处于承载分离的状态信息以及所述 UE 当前所在的本地节点信息, 和 /或 UE当前在本地节点上的承载信息; 以及从返回切换请求 响应的备选目标宏基站中, 为所述 UE选定进行切换的目标宏基站, 将切换目标宏基站返 回的切换请求响应中携带的切换命令发送给所述 UE,并停止向所述 UE发送数据且停止接 收该 UE发送的数据;
切换目标宏基站, 用于在接收到所述源宏基站发送的切换请求后, 进行接纳判决; 在 确定自身允许接纳所述 UE,且自身支持承载分离时,进行所述 UE在本基站中的底层配置, 并向所述源宏基站返回切换请求响应, 所述切换请求响应中携带承载分离支持确认消息及 用于指示所述 UE进行切换的切换命令;
UE,用于在接收到源宏基站发送的切换命令,且所述切换命令中携带承载分离支持确 认消息后, 停止向所述源宏基站发送数据且停止接收所述源宏基站发送的数据, 并向切换 目标宏基站发起同步过程, 其中, 所述 UE停止向本地节点发送数据且停止接收所述本地 节点发送的数据, 或维持向本地节点发送数据及接收所述本地节点发送的数据; 以及在完 成与所述切换目标宏基站的同步过程后, 分别与所述切换目标宏基站及所述本地节点进行 数据传输;
本地节点, 用于接收源宏基站或切换 标宏基站发送的配置信息; 以及使用所述配置 信息中携带的切换目标宏基站配置的安全参数, 分别与 UE及所述切换目标宏基站进行数 据传输; 其中, 在切换过程中, 所述本地节点停止向所述 UE发送数据且停止接收该 UE 发送的数据, 或维持向所述 UE发送数据及接收该 UE发送的数据。
PCT/CN2014/070139 2013-01-06 2014-01-06 一种承载分离场景下进行切换的方法、设备及系统 WO2014106483A1 (zh)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US14/759,233 US10051529B2 (en) 2013-01-06 2014-01-06 Method, device and system for switching under bearer separation scenario
EP14735249.6A EP2943008B1 (en) 2013-01-06 2014-01-06 Methods and devices for a handover under bearer separation scenario

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201310003654.5A CN103916917B (zh) 2013-01-06 2013-01-06 一种承载分离场景下进行切换的方法、设备及系统
CN201310003654.5 2013-01-06

Publications (1)

Publication Number Publication Date
WO2014106483A1 true WO2014106483A1 (zh) 2014-07-10

Family

ID=51042225

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2014/070139 WO2014106483A1 (zh) 2013-01-06 2014-01-06 一种承载分离场景下进行切换的方法、设备及系统

Country Status (4)

Country Link
US (1) US10051529B2 (zh)
EP (1) EP2943008B1 (zh)
CN (1) CN103916917B (zh)
WO (1) WO2014106483A1 (zh)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106162598A (zh) * 2015-04-10 2016-11-23 电信科学技术研究院 一种用户设备到网络中继场景下的通信方法及装置
CN107005987A (zh) * 2015-05-22 2017-08-01 华为技术有限公司 无线承载建立方法和设备
CN107454679A (zh) * 2016-06-01 2017-12-08 宏达国际电子股份有限公司 处理无线资源控制连结恢复程序的装置及方法

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3101947A4 (en) * 2014-01-31 2017-01-11 Fujitsu Limited Radio communication method, radio communication system, base station, and radio station
EP3195682A1 (en) * 2014-08-26 2017-07-26 Nokia Solutions and Networks Oy Broadcast based network access
CN106332152B (zh) * 2015-06-30 2019-09-27 华为技术有限公司 一种数据传输方法以及相关设备
CN107852635B (zh) * 2015-08-07 2021-09-10 苹果公司 用于多rat聚合的基于多用户的分离
US10122500B2 (en) 2015-08-26 2018-11-06 Apple Inc. Efficient sparse network resource usage and connection release
CN113423124B (zh) 2016-04-01 2023-10-13 北京三星通信技术研究有限公司 一种支持无缝切换的方法及基站设备
EP3198940B1 (en) * 2016-04-01 2020-06-03 Telefonaktiebolaget LM Ericsson (publ) Network device, terminal device and methods for facilitating handover of terminal device
US10917786B2 (en) 2016-08-11 2021-02-09 Samsung Electronics Co., Ltd. Low power RRC operating method and device
CN108024294B (zh) 2016-11-02 2020-08-07 中兴通讯股份有限公司 切换方法及装置
CN108024295B (zh) * 2016-11-03 2022-04-19 中兴通讯股份有限公司 中继转移方法及装置、终端、基站
US11582654B2 (en) 2016-11-04 2023-02-14 Telefonaktiebolaget Lm Ericsson (Publ) Systems and methods of handing over a wireless device
CN108260172B (zh) * 2016-12-29 2020-08-28 大唐移动通信设备有限公司 一种调整终端接入指定频点小区的方法与装置
CN108282818B (zh) 2017-01-06 2020-11-17 中兴通讯股份有限公司 一种ran通知范围信息处理方法及装置
CN108632909B (zh) * 2017-03-24 2019-08-23 电信科学技术研究院 一种QoS处理方法和装置
CN109792612B (zh) * 2017-04-18 2021-10-22 华为技术有限公司 终端监控信息的同步方法、设备及系统
WO2018222093A1 (en) * 2017-05-30 2018-12-06 Telefonaktiebolaget Lm Ericsson (Publ) Cell re-selection procedure assistance and devices therefore
US11032866B2 (en) * 2017-11-27 2021-06-08 FG Innovation Company Limited Methods and related devices for multi-connectivity
WO2020033210A1 (en) * 2018-08-06 2020-02-13 Google Llc Inter-rat handover including transferring a radio bearer configuration
US11706670B2 (en) 2018-08-06 2023-07-18 Google Llc Transferring a radio bearer configuration
EP3874811A1 (en) 2018-11-01 2021-09-08 Telefonaktiebolaget LM Ericsson (publ) Systems and methods for preventing handover caused by an insecure message from a network node
CN111801963A (zh) * 2019-01-31 2020-10-20 联发科技股份有限公司 多无线电接入技术双连接中的移动性中断减少
CN112533256A (zh) * 2019-09-17 2021-03-19 维沃移动通信有限公司 数据传输方法、终端及网络节点
CN111695182B (zh) * 2020-05-28 2023-05-26 北京朔方天城智能科技有限公司 Bim模型按需加载切换方法及系统
CN115297530B (zh) * 2022-09-28 2023-04-07 荣耀终端有限公司 网络连接方法和装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100113031A1 (en) * 2008-10-30 2010-05-06 Electronics And Telecommunications Research Institute Terminal, method for handover thereof, and supporting method for handover of base station
CN102685826A (zh) * 2011-03-17 2012-09-19 华为技术有限公司 切换处理方法、装置和系统
CN102833802A (zh) * 2012-08-15 2012-12-19 电信科学技术研究院 一种数据转发方法及设备

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102348244B (zh) * 2010-08-03 2014-11-05 华为技术有限公司 蜂窝通信系统、终端在小区间切换的方法及宏基站
CN102469557B (zh) * 2010-11-15 2014-08-13 华为技术有限公司 接入基站方法、基站和用户设备
US20140120921A1 (en) * 2011-06-21 2014-05-01 Nokia Corporation Methods, apparatuses and computer program products for providing an optimized handover preparation and execution operation

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100113031A1 (en) * 2008-10-30 2010-05-06 Electronics And Telecommunications Research Institute Terminal, method for handover thereof, and supporting method for handover of base station
CN102685826A (zh) * 2011-03-17 2012-09-19 华为技术有限公司 切换处理方法、装置和系统
CN102833802A (zh) * 2012-08-15 2012-12-19 电信科学技术研究院 一种数据转发方法及设备

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106162598A (zh) * 2015-04-10 2016-11-23 电信科学技术研究院 一种用户设备到网络中继场景下的通信方法及装置
CN107005987A (zh) * 2015-05-22 2017-08-01 华为技术有限公司 无线承载建立方法和设备
EP3291620A4 (en) * 2015-05-22 2018-04-25 Huawei Technologies Co., Ltd. Radio bearer establishment method and device
US10314086B2 (en) 2015-05-22 2019-06-04 Huawei Technologies Co., Ltd. Radio bearer setup method and device
CN107005987B (zh) * 2015-05-22 2019-07-12 华为技术有限公司 无线承载建立方法和设备
CN107454679A (zh) * 2016-06-01 2017-12-08 宏达国际电子股份有限公司 处理无线资源控制连结恢复程序的装置及方法

Also Published As

Publication number Publication date
US10051529B2 (en) 2018-08-14
EP2943008B1 (en) 2018-11-21
EP2943008A1 (en) 2015-11-11
CN103916917B (zh) 2018-08-07
CN103916917A (zh) 2014-07-09
US20150358865A1 (en) 2015-12-10
EP2943008A4 (en) 2016-06-08

Similar Documents

Publication Publication Date Title
WO2014106483A1 (zh) 一种承载分离场景下进行切换的方法、设备及系统
JP6084747B2 (ja) 基地局、ユーザ端末及びプロセッサ
JP7212112B2 (ja) 移動通信システム、中継ノード、及び基地局
JP6637056B2 (ja) シグナリング最適化の方法および装置
JP5815140B2 (ja) 強化型接続リカバリの方法
US9521600B2 (en) Handover mechanism in cellular networks
WO2020151653A1 (zh) 由用户设备执行的切换方法以及用户设备
EP2763461B1 (en) Radio resource control connection reestablishment method
CN109309968A (zh) 无线通信系统中恢复无线电资源控制连接的方法和设备
JP6637617B2 (ja) 通信方法、ネットワーク側デバイス、およびユーザ端末
JP2018125895A (ja) 無線システムにおけるデバイスツーデバイス(d2d)モビリティのための方法および装置
TW201322677A (zh) 提供中繼行動性系統及/或方法
EP3871467B1 (en) Methods and nodes for performing a handover at resume
WO2014154132A1 (zh) 一种针对无线链路失败的网络优化方法、装置及系统
JP7303290B2 (ja) 通信制御方法
WO2014044070A1 (zh) 一种连接重建的方法及设备
EP3267724A1 (en) Data transmission method for use during base station handover, user device and base station, and storage medium
CA2899192C (en) Handover mechanism in cellular networks

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: 14735249

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

WWE Wipo information: entry into national phase

Ref document number: 14759233

Country of ref document: US

Ref document number: 2014735249

Country of ref document: EP