WO2010078839A1

WO2010078839A1 - Handover method, equipment and system

Info

Publication number: WO2010078839A1
Application number: PCT/CN2010/070033
Authority: WO
Inventors: 戴明增; 帅扬来; 秦亚莉; 相治咸
Original assignee: 华为技术有限公司
Priority date: 2009-01-06
Filing date: 2010-01-06
Publication date: 2010-07-15
Also published as: CN101772119A

Abstract

A handover method, an equipment, and a system thereof, which belong to the field of communications, are provided. The handover method includes: User Equipment (UE) handover capability related information is obtained (S101); and if UE handover capability related information instructs that the UE supports only non-optimized handover, handling of non-optimized handover is performed (S102).

Description

Switching method, device and system The present application claims the priority of the Chinese Patent Application filed on January 6, 2009, the Chinese Patent Application No. CN 200910003135.2, entitled "Switching Method, Equipment and System", the entire contents of which are The citations are incorporated herein by reference. The present invention relates to the field of communications, and in particular, to a handover method, device, and system. Background Art Currently, LTE and CDMA2000 High Rate Packet Data (HRPD) system interoperability is classified into non-optimized switching and optimized switching.

Non-optimized handover means that the access equipment (User Equipment, UE) access technology does not use the source radio access network (RAN) and the target radio access when changing between Long Term Evolution (LTE) and HRPD. The tunnel between the networks passes signaling (S101 signaling). After leaving the source wireless access network, the UE performs a wireless-level attach procedure on the target wireless network, and completes the switching of the packet data network through Proxy Mobile IP (PMIP) to ensure service continuity. Non-optimized switching includes active switching and idle switching. In the non-optimized handover of LTE to HRPD, the wireless layer is re-established, and the network layer implements mobility through PMIP. The specific process includes: non-optimized handover initialization; HRPD service gateway (HSPD serving Gateway full name, HSGW) and packet data network gateway full name (English full name PDN Gateway, P-GW) attachment; in the evolved packet domain system (Enhanced Packet System, EPS) releases the resource; and the UE initiates connection to the attached Packet Data Network (PDN).

The optimized handover can be divided into two phases: a pre-registration phase and a handover phase, which specifically includes the eNB making a handover decision according to the measurement report of the UE; the eNB delivers an E-UTRA handover preparation request (Handover From EUTRA preparation Request) to the UE; the UE and the CDMA2000 The HRPD system completes the handover interaction; and the eNB delivers the Mobility From EUTRA Command to the UE.

In the prior art, a UE having only the capability of non-optimized handover cannot implement handover from the LTE network to the HPRD network. Summary of the invention

Embodiments of the present invention provide a handover method, device, and system. The embodiment of the present invention provides a handover method, where the method includes: acquiring terminal handover capability related information; and if the terminal handover capability related information indicates that the terminal only supports non-optimized handover, performing non-optimization handover processing.

An embodiment of the present invention provides a handover method, where the method includes: the terminal sends information about the handover capability of the terminal, where the information about the handover capability of the terminal indicates that the terminal only supports the non-optimized handover; and the terminal receives the non-optimized handover indication, and Switching is performed according to the non-optimized switching indication.

The embodiment of the present invention provides a switching device, where the switching device includes: a sending unit, configured to send information about a handover capability of the terminal, where the information about the handover capability of the terminal indicates that the terminal only supports non-optimized handover; and the receiving unit is configured to receive a non- Optimizing the handover indication; and, the processing unit, configured to perform handover according to the non-optimized handover indication.

The embodiment of the present invention provides a switching device, where the switching device includes: a receiving unit, configured to receive information about a UE handover capability and a measurement report of the UE; and a triggering unit, configured to: when the terminal switching capability related information indicates that the terminal only supports the non- The transmitting unit is triggered when the switching is optimized; and the sending unit is configured to perform a non-optimized switching process when receiving the trigger of the trigger unit.

An embodiment of the present invention provides a system, where the system includes at least an evolved base station, configured to acquire terminal handover capability related information of a terminal, and if the terminal handover capability related information indicates that the terminal only supports non-optimized handover, send a non-optimized handover processing indication. To the terminal.

The handover method, device, and system provided by the embodiments of the present invention notify the eNB of the capability of the UE to support the optimized handover, so that the eNB can determine whether to perform the optimal handover according to whether the UE supports the optimized handover, and solve the problem of only having the non-optimized handover. The UE cannot implement the technical problem of handover from the LTE network to the HPRD network, thereby saving air interface resources and avoiding UE error handling, and increasing flexibility of network configuration. BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a flowchart of a method according to Embodiment 1 of the present invention;

2 is a flowchart of a method according to Embodiment 2 of the present invention;

3 is a flowchart of a method according to Embodiment 3 of the present invention;

4 is a flowchart of a method provided in Embodiment 4 of the present invention;

FIG. 5 is a flowchart of a method according to Embodiment 5 of the present invention; FIG.

6 is a flowchart of a method provided in Embodiment 8 of the present invention;

7 is a flowchart of a method provided in Embodiment 10 of the present invention;

8 is a schematic structural diagram of a device according to Embodiment 11 of the present invention;

9 is a schematic structural diagram of a device according to Embodiment 12 of the present invention; FIG. 10 is a schematic structural diagram of a system according to Embodiment 13 of the present invention. DETAILED DESCRIPTION OF THE INVENTION In order to make the objects, technical solutions and advantages of the present invention more comprehensible, the present invention will be further described in detail with reference to the accompanying drawings. The illustrative embodiments of the present invention and the description thereof are intended to explain the present invention, but are not intended to limit the invention. The technical solution of the present invention will be described in detail below with reference to the accompanying drawings. The embodiment of the present invention provides a handover method, where the method includes: the eNB acquires terminal handover capability related information including capability information of the terminal supporting the optimized handover and/or the non-optimization handover; and if the terminal handover capability related information indicates that the terminal only supports For non-optimized handover, the eNB performs non-optimized handover processing. The embodiment of the present invention further provides a handover method, where the method may include: transmitting terminal handover capability related information, including capability information of the terminal supporting optimized handover and/or non-optimization handover; receiving a handover processing indication, and according to the handover processing indication Switch. The optimized switching process in the embodiments of the present invention may be referred to as an optimized switching or optimization process, and the non-optimized switching process may be simply referred to as a non-optimized switching or non-optimized processing.

The embodiment of the present invention notifies the eNB of the capability of the UE to support the optimized handover, so that the eNB can determine whether to perform the optimized handover according to whether the UE supports the capability of optimizing the handover, and the UE capable of implementing the non-optimized handover cannot implement the LTE network to the HPRD. The technical problem of network switching, thereby saving air interface resources and avoiding UE error handling, and increasing the flexibility of network configuration. Referring to FIG. 1, a first embodiment of the present invention provides a handover method. The method can include the following steps.

S101: Obtain information about UE handover capability. In this step, the eNB may obtain UE handover capability related information from a core network (Core Network, CN) or a UE; where, a message that can be sent from the CN (eg, a context initial setup message (Sl-AP: INITIAL CONTEXT SETUP REQUEST) Obtaining handover capability related information, or obtaining handover capability related information of the UE from a UE CAPABILITY INFOMARION, or obtaining UE handover capability from an Access Stratum (AS) message sent by the UE Information; S102: If the UE only supports non-optimized handover, perform non-optimized handover processing. In this step, the eNB decides whether to perform an optimized handover according to whether the UE only supports non-optimized handover and/or pre-registration is successful. When the UE supports optimized handover or different system measurement, an optimized handover process is performed. For example, for UEs that support optimized handover, send a handover request from EUTRA (Handover From EUTRA Preparation) Request) Message. For a UE that supports only non-optimized handover, the eNB delivers a non-optimized handover indication, for example, redirection through a RRC Connection Release message. In this embodiment, after obtaining the UE handover capability related information, the eNB can determine whether to perform optimal handover according to whether the UE supports the capability of optimizing handover, thereby saving air interface resources and avoiding some error handling, and increasing network configuration flexibility. . The UE handover capability related information in the embodiments of the present invention mainly refers to whether the UE supports optimized handover and/or non-optimization handover. If the protocol stack between the two systems of the terminal does not interact, it can be considered that the UE only supports non-optimized handover, that is, only has non-optimized handover capability, that is, the terminal does not have the capability of inter-system measurement.

Referring to FIG. 2, the method S101 of the first embodiment of the present invention may be used to obtain information about UE handover capability provided in the second embodiment, where the method may include the following steps:

S201: The eNB sends an AS layer query message (eg, UE capability query message, UE CAPABILITY ENQIURY) to the UE.

S202: The UE sends the UE handover capability information to the eNB by using an AS layer response message (eg, UE capability message, UE CAPABILITY INFOMARION). The foregoing handover capability related information refers to capability information of the terminal supporting optimized handover and/or non-optimization handover. The above non-optimized switching capability refers to the ability of the terminal to have no inter-system measurement. In this embodiment, the eNB can obtain the information about the UE handover capability through the access layer UE capability query process, and then decide whether to perform the optimal handover according to whether the UE supports the capability of optimizing the handover, thereby saving air interface resources and avoiding some error handling. And increase the flexibility of network configuration. Referring to FIG. 3, the S101 of the first embodiment of the present invention may use the method for obtaining UE handover capability related information provided in the third embodiment, and the method may include the following steps.

S301: The UE sends an access layer message to the eNB, where the UE handover capability information is carried. The foregoing UE handover capability related information refers to capability information of the terminal supporting optimized handover and/or non-optimization handover. In this embodiment, the eNB can obtain the UE handover capability related information by using the access layer message sent by the UE, and then decide whether to perform the optimal handover according to whether the UE supports the optimized handover capability, thereby saving air interface resources and avoiding some error handling. And increase the flexibility of network configuration. Referring to FIG. 4, the S101 of the first embodiment of the present invention may be used to obtain the UE handover capability related information provided in the fourth embodiment, and the method may include the following steps. S401: The e B sends the SI interface UE capability query information (eg, UE initialization message, INITIAL UE MESSAGE) to the CN.

S402: The CN replies to the SI interface message (eg, the context initial setup request, INITIAL CONTEXT SETUP REQUEST) to the eNB, where the UE includes only UE capability information that supports non-optimized handover. In this embodiment, the eNB can obtain the UE handover capability related information by using the CN to reply to the S1 interface message, and then decide whether to perform the optimized handover according to whether the UE supports the optimized handover capability, thereby saving air interface resources and avoiding some error handling, and Increased flexibility in network configuration. Referring to FIG. 5, the S101 of the first embodiment of the present invention may be used to obtain the UE handover capability related information provided in the fifth embodiment, and the method may include the following steps. S501: The UE sends a Non-Access Stratum (NAS) to the CN, where the UE includes handover capability information.

S502: The CN replies to the S1 interface message (eg, the context initial setup request, INITIAL CONTEXT SETUP REQUEST) to the eNB, where the UE includes only UE capability information that supports non-optimized handover. In this embodiment, the eNB can obtain UE handover capability related information from the CN, and then decide whether to perform optimized handover according to whether the UE supports the capability of optimizing handover, thereby saving air interface resources and avoiding some error handling, and increasing network configuration. flexibility. Embodiment 1 of the present invention may further include the step of determining that the UE only supports non-optimized handover. For example, the sixth embodiment provides a method for determining that a UE supports only non-optimized handover and performs corresponding processing, and the method may include the following steps. Step 601: The network side sends an inter-RAT measurement to the UE supporting the optimized handover and the UE supporting only the non-optimized handover, wherein the UE that supports only the non-optimized handover may not configure the pre-registration information. Step 602: Obtain measurement reports of two UEs. Step 603: Determine a handover processing type according to whether the UE only supports non-optimized handover and/or pre-registration success.

Step 604: Send a handover command to the UE supporting the optimized handover (eg, switching the preparation request from the EUTRA)

(Handover From EUTRA Preparation Request ). Step 605: For the UE that supports only the non-optimized handover, the network side sends a non-optimized handover indication, for example, a redirection by using a RRC Connection Release message. In this embodiment, after obtaining the UE handover capability related information, the eNB can send an inter-system measurement configuration to the UE supporting the optimized handover and the UE supporting only the non-optimized handover, according to whether the UE supports the capability of optimizing handover and/or Whether pre-registration is successful to decide whether to perform optimal switching, thereby saving air interface resources and avoiding some error handling, and increasing the flexibility of network configuration. Embodiment 1 of the present invention may further include the step of determining that the UE only supports non-optimized handover. For example, the seventh embodiment provides a method for determining that a UE supports only non-optimized handover and performs corresponding processing, and the method may include the following steps. Step 701: The network side does not send the inter-system measurement configuration to the UE that supports only the non-optimized processing, but only sends the inter-system measurement configuration to the UE that only supports the optimization process. Step 702: Only the measurement report supporting the optimization processing UE is obtained. Step 703: Determine a handover processing type according to whether the UE supports optimization of handover and/or pre-registration. Step 704: Send a handover command (for example, a Handover From EUTRA Preparation Request) to the UE that supports the optimized handover. Step 705: The network side sends a non-optimized handover indication to the UE that supports only the non-optimized handover. For example, the redirection is performed by using a radio resource connection release message (RRC Connection Release). In this embodiment, after obtaining the UE handover capability related information, the eNB may not perform inter-system measurement on the UE that supports only the non-optimized handover. Configure to perform radio resource control connection reconfiguration, and decide whether to perform optimal handover according to whether the UE supports the capability of optimizing handover and/or whether the pre-registration is successful, thereby saving air interface resources and avoiding some error handling, and increasing flexibility of network configuration. With reference to Figure 6, the first embodiment of the present invention may further include the step of determining that the UE supports only the non-optimized handover. For example, the eighth embodiment provides a method for determining that the UE supports only non-optimized handover and performs corresponding processing, and the method may include The following steps.

S801: The network side sends an inter-system measurement configuration to the UE supporting the optimized handover and only supports the non-optimized handover.

S802: Obtain a measurement report of the UE supporting the optimized handover. It should be noted that UEs that only support non-optimized handover do not send measurement reports. S803: Determine a handover processing type according to whether the UE only supports non-optimized handover and/or pre-registration is successful.

S804: For the UE supporting the optimized handover, send a handover command, such as: Handover From EUTRA Preparation Request.

S805: For the UE that supports only the non-optimized handover, the network side sends a non-optimized handover indication, for example, a redirection by using a RRC Connection Release message. In this embodiment, after obtaining the UE handover capability related information, the eNB can perform radio resource control connection reconfiguration for all UEs to send different inter-system measurement configurations, but only UEs that support non-optimized handover do not send reports, according to whether the UE Supports the ability to optimize handover and/or whether pre-registration is successful to determine whether to perform optimal handover, thereby saving air interface resources and avoiding some error handling, and increasing the flexibility of network configuration. Embodiment 1 of the present invention may further include the step of determining that the UE only supports non-optimized handover. For example, the ninth embodiment provides a method for determining that the UE only supports non-optimized handover and performs corresponding processing, and the method may include the following steps. Step 901: The network side does not send the inter-system measurement configuration to the UE that supports only the non-optimized processing, but only sends the inter-system measurement configuration to the UE that supports the optimization process. Step 902: Only the measurement report supporting the optimization processing UE is obtained. Step 903: Determine whether to perform an optimal switching according to whether the UE supports optimization switching and/or pre-registration success.

Step 904: Send a handover command (for example, a Handover From EUTRA Preparation Request) to the UE that supports the optimized handover. The network side does not send the inter-RAT measurement configuration to the UE that supports only the non-optimized handover. The UE that supports only the non-optimized handover performs the non-optimized handover according to the local policy. The local policy is that the UE can be switched according to the access network side indication or the handover assistance information indicated by the core network. Referring to FIG. 7, the tenth embodiment of the present invention provides a Switching method. The method may include the following steps.

S1001: Send, to the eNB, whether handover capability related information is supported only for non-optimized handover. In this step, the UE may reply to the access layer response message after the eNB sends an access layer query message (eg, UE CAPABILITY ENQIURY) (eg, UE capability message (UE CAPABILITY INFOMARION) And to the eNB, including whether the UE only supports the UE capability information of the non-optimized handover; and the UE may directly send the access layer message (AS) to the eNB, where the UE includes only the UE capability information of the non-optimized handover. The UE may also send a Non-Access Stratum (NAS) to the Core Network (CN), including whether the UE supports only UE capability information of the non-optimized handover.

S1002: Receive a handover processing indication from the eNB, and perform handover according to the handover processing indication. In this step, the UE that supports the optimized handover receives the optimized handover indication, and only the UE that supports the non-optimized handover receives the non-optimized handover indication. Or only the UE that supports the optimized handover receives the optimized handover indication, and only the UE that supports the non-optimized handover performs the non-optimized handover according to the local policy. The local policy is that the UE can switch according to the indication of the access network side or the handover assistance information indicated by the core network. In this embodiment, after the UE sends the handover capability related information to the eNB, the eNB may decide whether to perform optimal handover according to whether the UE supports the capability of optimizing handover, thereby saving air interface resources and avoiding some error handling, and increasing network configuration. flexibility. Referring to FIG. 8, a tenth embodiment of the present invention provides a switching device. In this embodiment, the switching device takes the terminal 100 as an example. The switching device may include a first transmitting unit 110, a processing unit 130, and a first receiving unit 120. The first sending unit 110 is configured to send the handover capability related information. Optionally, the terminal handover capability related information includes capability information that supports optimized handover and/or non-optimized handover. The first receiving unit 120 is configured to receive switching processing information. The processing unit 130 is configured to perform a handover process according to the handover processing indication. Further, the handover capability related information sent by the first sending unit 110 indicates that the terminal only supports non-optimized handover. Further, the first receiving unit 120 may be further configured to receive a request for querying the foregoing handover capability related information. Further, the first sending unit 110 may further be configured to send an access layer message (such as a terminal capability) that includes handover capability related information. The message is sent to the evolved base station, or the non-access stratum message including the handover capability related information is sent to the core network; further, when the handover processing information received by the first receiving unit 120 is an optimized handover indication, the handover process performed by the processing unit 130 To optimize the handover; when the handover processing information is a non-optimized handover indication, the handover processing performed by the processing unit 130 is a non-optimized handover. Further, the UE 100 further includes a local policy switching unit 140, configured to perform a non-optimized handover according to the local policy when the UE only supports the non-optimized handover. The local policy is that the UE can switch according to the indication of the access network or the handover assistance information indicated by the core network. In this embodiment, after the UE sends the handover capability related information to the eNB, the eNB may decide whether to perform optimal handover according to whether the UE supports the capability of optimizing handover, thereby saving air interface resources and avoiding some error handling, and increasing network configuration. flexibility. Referring to FIG. 9, a twelfth embodiment of the present invention provides a switching device. The switching device in this embodiment takes the evolved base station 200 as an example. The switching device may include a second receiving unit 210, a triggering unit 220, and a second sending unit 230. The second receiving unit 210 is configured to receive UE switching capability related information, and is further configured to receive a measurement report of the UE. The triggering unit 220 is configured to trigger the second sending unit 230 when the UE supports only the non-optimized switching. When the second sending unit 230 receives the trigger of the triggering unit 220, the second sending unit 230 performs a non-optimized switching process, for example, sends a non-optimized switching processing indication. Further, the evolved base station 200 further includes a handover capability query unit 240, configured to generate a request for querying UE handover capability related information (eg, UE capability query, UE CAPABILITY ENQIURY), and the evolved base station 200 sends a UE handover capability query request to After receiving the UE capability response message, the UE includes the UE handover capability related information of the non-optimized handover. The second receiving unit 210 is further configured to receive an access layer message (AS) sent by the UE, where The UE includes handover capability related information including whether the UE supports only non-optimized handover. Further, the second receiving unit The 210 may also be configured to receive a context initial setup request (INITIAL CONTEXT SETUP REQUEST) sent by the CN, where the UE includes only the UE handover capability related information of the non-optimized handover. Further, the evolved base station 200 may further include a UE initialization unit 250. For generating the UE initialization message, the evolved base station 200 sends the UE initialization message to the CN, and then receives the INITIAL CONTEXT SETUP REQUEST sent by the CN, including whether the UE supports only the UE handover capability related information of the non-optimized handover. In this embodiment, the working mode of the handover process performed by the evolved base station 200 may be as follows: 1. The second sending unit 230 sends an inter-system measurement configuration to all UEs for pre-registration, where the UE that supports only non-optimized handover may not Configuring pre-registration information, and then receiving measurement reports of all UEs; the triggering unit 220 determines whether the UE only supports non-optimized handover and/or pre-registration is successful to trigger the second sending unit 230 to send an optimized handover indication for the UE supporting the optimized handover. Such as switching from EUTRA preparation request (Handover From EUTRA Preparation Request), generates a non-optimized handover indication for a UE that only supports non-optimized handover, such as redirection through a RRC Connection Release message. 2. The second sending unit 230 does not send the inter-system measurement configuration to the UE that supports only the non-optimized processing for pre-registration, but only sends the inter-system measurement configuration to the UE that supports the optimization process for pre-registration. The second receiving unit 210 then only receives the measurement report supporting the optimized handover UE; the triggering unit 220 determines whether the UE only supports the non-optimized handover and/or the pre-registration is successful to trigger the second sending unit 230 to transmit the optimization for the UE supporting the optimized handover. The handover indication, such as the Handover From EUTRA Preparation Request, generates a non-optimized handover indication for the UE that only supports the non-optimized handover, such as redirection through a RRC Connection Release message (Relay) . 3. The second sending unit 230 does not send the inter-system measurement configuration to the UE that supports only the non-optimized processing for pre-registration, but only sends the different system measurement configuration to the UE that supports the optimization process for pre-registration. The second receiving unit 210 then only receives the measurement report supporting the optimized handover UE; the trigger unit 220 determines whether the UE only supports the non-optimized handover and/or the pre-registration is successful to trigger the processing unit 230 to only transmit the optimized handover for the UE supporting the optimized handover. Instructions, such as Handover From EUTRA Preparation Request. The network side does not send the inter-RAT measurement configuration to the UE that supports only the non-optimized handover, and only the UE that supports the non-optimized handover performs the non-optimized handover according to the local policy. The local policy is that the UE can switch according to the indication of the system information or the handover assistance information indicated by the core network. The second sending unit 230 sends an inter-system measurement configuration to all UEs for pre-registration, and then the second receiving unit 210 only receives the measurement report of the UE that supports the optimized handover, because only the UE that supports the non-optimized handover does not send the measurement report; The unit 220 determines whether the UE only supports non-optimized handover and/or pre-registration is successful to trigger the second sending unit 230 to send an optimized handover indication for the UE supporting the optimized handover, such as a handover preparation request from the EUTRA.

(Handover From EUTRA Preparation Request), generating a non-optimized handover indication for a UE that only supports non-optimized handover, for example, redirection by a RRC Connection Release message. In this embodiment, after obtaining the UE handover capability related information, the eNB can determine whether to perform optimal handover according to whether the UE supports the capability of optimizing handover, thereby saving air interface resources and avoiding some error handling, and increasing network configuration flexibility. . As shown in FIG. 10, a thirteenth embodiment of the present invention provides a system. The system 300 may include the following: an evolved base station 310, configured to acquire terminal handover capability related information, and if the terminal handover capability related information indicates that the terminal 320 supports only non-optimized handover, perform non-optimized handover processing, for example, sending a non-optimized handover process. Indicated to terminal 320. Correspondingly, the terminal 320 is configured to receive the non-optimized handover indication, and according to the non-optimized handover indication. Switch. Optionally, the terminal handover capability related information includes capability information that the terminal supports the optimized handover and/or the non-optimized handover. In this embodiment, the UE notifies the eNB of the ability to support the optimized handover, so that the eNB can decide whether to perform the optimized handover according to whether the UE supports the capability of optimizing the handover, and the UE capable of implementing the non-optimized handover cannot implement the LTE network to the HPRD network. The technical problem of switching, thereby saving air interface resources and avoiding UE error handling, and increasing the flexibility of network configuration. The above description of the present invention has been described in detail with reference to the preferred embodiments of the present invention. It is intended that all modifications, equivalents, improvements, etc., made within the scope of the invention are intended to be included within the scope of the invention.

Claims

Rights request

A switching method, characterized in that the method comprises:

Obtain information about terminal handover capability;

If the terminal handover capability related information indicates that the terminal only supports non-optimized handover, non-optimized handover processing is performed.

2. The method according to claim 1, wherein the performing the non-optimized handover process comprises: performing redirection by sending a non-optimized handover indication.

3. The method according to claim 2, wherein the non-optimized handover indication is a radio resource connection release message.

The method according to claim 1, wherein the acquiring information about the handover capability of the terminal comprises: acquiring information about the handover capability of the terminal provided by the terminal; or

Obtain information about the terminal handover capability provided by the core network.

The method according to claim 4, wherein the acquiring terminal handover capability related information provided by the terminal comprises:

Receiving a terminal capability message sent by the terminal, where the terminal capability message includes terminal handover capability information.

The method according to any one of claims 1 to 5, wherein, when the terminal handover capability related information includes capability information that the terminal only supports non-optimized handover, the terminal handover capability related information indicates the terminal Only non-optimized switching is supported.

The method according to any one of claims 1 to 5, wherein the terminal handover capability related information indicates that the terminal only supports non-optimized handover includes:

The terminal handover capability related information indicates that the terminal does not have the capability of inter-system measurement.

8. A handover method, characterized in that the method comprises:

The terminal sends terminal handover capability related information, where the terminal handover capability related information indicates that the terminal only supports non-optimized handover;

The terminal receives a non-optimized handover indication and performs handover according to the non-optimized handover indication.

The method according to claim 8, wherein the terminal handover capability related information comprises capability information that the terminal only supports non-optimized handover.

The method according to claim 8, wherein the terminal handover capability related information indicates that the terminal only supports non-optimized handover includes:

The method according to claim 8, wherein the transmitting terminal handover capability related information includes:

The terminal sends an access layer message including information about the handover capability of the terminal to the base station; or

The terminal sends a non-access stratum message including the terminal handover capability related information to the core network, where the core network is used to forward the terminal handover capability related information to the base station.

The method according to claim 11, wherein the access layer message is a terminal capability message.

13. A base station, comprising:

a receiving unit, configured to receive information related to handover capability of the terminal;

a triggering unit, configured to trigger a sending unit when the terminal switching capability related information indicates that the terminal only supports non-optimized switching; and

And a sending unit, configured to perform a non-optimized switching process when receiving the trigger of the trigger unit.

The base station according to claim 13, wherein the sending unit is specifically configured to: when receiving the trigger of the trigger unit, send a non-optimized handover processing indication to perform redirection.

15. A terminal, comprising:

a sending unit, configured to send information about a handover capability of the terminal, where the information about the handover capability of the terminal indicates that the terminal only supports non-optimized handover;

a receiving unit, configured to receive a non-optimized switching indication; and

And a processing unit, configured to perform switching according to the non-optimized handover indication.

The terminal according to claim 15, wherein the terminal handover capability related information includes capability information that the terminal only supports non-optimized handover.

The terminal according to claim 15, wherein the sending unit is specifically configured to send an access layer message including terminal handover capability related information to the base station.

The terminal according to claim 17, wherein the access layer message is a terminal capability message.

A system, comprising: a base station, the base station is configured to acquire terminal handover capability related information of the terminal, and if the terminal handover capability related information indicates that the terminal only supports non-optimized handover, send a non-optimized handover processing indication. To the terminal.

The system according to claim 17, wherein the terminal is configured to receive a non-optimized handover indication and perform handover according to the non-optimized handover indication.