CN101516084B - Method and device for obtaining functional entity address of anchor data channel - Google Patents

Abstract

Translated fromChinese

本发明公开了一种获取锚定数据通道功能实体地址的方法及装置，终端对应的锚定数据通道功能实体Anchor DPF发生迁移后，终端当前的AnchorDPF或当前的ASN-GW向服务基站发送通知消息，通知服务基站终端当前的Anchor DPF地址；本发明还公开了一种获取锚定数据通道功能实体地址的装置；本发明实施例所述的方法及装置，能够使得终端对应的Anchor DPF迁移后，BS或Target ASN-GW可的获得终端当前的Anchor DPF地址，进一步的，保证后续切换时，正确的建立到终端当前Anchor DPF的数据通道，使切换过程顺利完成。

The present invention discloses a method and device for obtaining the address of an anchor data channel functional entity. After the migration of the anchor data channel functional entity Anchor DPF corresponding to the terminal occurs, the current AnchorDPF or the current ASN-GW of the terminal sends a notification message to the serving base station , notify the serving base station terminal of the current Anchor DPF address; the present invention also discloses a device for obtaining the address of the anchor data channel function entity; the method and device described in the embodiment of the present invention can enable the terminal corresponding to the Anchor DPF to migrate, The BS or Target ASN-GW can obtain the current Anchor DPF address of the terminal, and further, ensure that the data channel to the current Anchor DPF of the terminal is correctly established during the subsequent handover, so that the handover process can be completed smoothly.

Description

Obtain the method and the device of grappling data channel functional entity address

Technical field

The present invention relates to wireless communication field, especially a kind of method and device that obtains grappling data channel functional entity address.

Background technology

WiMAX (Worldwide Interoperability for Microwave Access, the microwave interoperability is inserted in the whole world) is a kind of wireless metropolitan area network technology based on the IEEE802.16 standard.WiMAX network wireless side is based on the wireless MAN access technology of IEEE802.16d/e standard; Adopt OFDM (Orthogonal Frequency Division Multiplexing; Orthogonal frequency division multiplexi) and OFDMA (OFDM Access; The OFDM access) physical-layer techniques, effectively anti-multipath decline.Under the optimum channel decline situation, transmission rate can be approached 75Mbps.

WiMAX cellular logic framework is as shown in Figure 1, and the whole network of WiMAX mainly is made up of following three parts:

(1) client: comprise SS (Subscriber Station, subscriber board) or MS (Mobile Station, travelling carriage), the user uses this devices accessing WiMAX network.

(2) accessing business network: ASN (Access Service Network, accessing business network) is defined as the network function set that the WiMAX terminal provides the wireless access service.ASN has comprised BS (BaseStation, base station) and ASN-GW (ASN Gateway, ASN gateway) network element.Wherein the major function of BS network element is: provide the L2 of BS and MS to be connected, RRM or the like; The major function of ASN-GW network element is: for MS authentication function provides client functionality, Relay function (like IP address assignment), ASN intra of L3 information etc. are provided for MS.

(3) connection service network: CSN (Connectivity Service Network connects service network) is defined as the WiMAX terminal provides IP Connection Service.CSN mainly comprises logic entities such as prepaid server and AAA server, and the major function that is provided is: the IP address assignment of MS, Internet insert, AAA proxy or server, based on user's authorization control etc.

Each inter-entity among the WiMAX communicates through the interface from R1 to R6; Each network element and interface relationship are as shown in Figure 1: when terminal MS S networks; Connect with the BS among the ASN (base station) through the R1 interface; Connect through R6 interface and ASN-GW (ASN gateway) then, be connected to CSN through Interface R3 again.Anchor DPF (grappling data channel functional entity) is for being arranged in the functional entity of ASN-GW; After MSS networks; BS will preserve the corresponding Anchor DPF address of MSS, when MSS switches, in switching message, carry this Anchor DPF address to target BS; Target BS is established to the Anchor DPF data channel at terminal according to this Anchor DPF address, to accomplish handoff procedure.

With reference to figure 2; When MSS moves, for example: move to the Another ASN area of coverage by the ASN area of coverage, MSS passes through R1 ' interface and connects with Another ASN; Another ASN is connected with former ASN through Interface R4, and former ASN carries out communication through Interface R3 and CSN again.The inventor finds; If for some reason, for example: above-mentioned Interface R4 is resource-constrained, or the Interface R3 resource of former ASN is nervous; Or in order to reduce data transmission delay (reducing the former ASN quantity of data process); Then the Anchor ASN/DPF of MSS will move, and the corresponding Anchor DPF of MSS this moment is moved to the ASN-GW of Another ASN by the ASN-GW of former ASN, after the Anchor DPF migration; The Interface R3 of corresponding connection CSN also will be moved to the R3 ' interface of ASN-GW among the Another ASN.After the Anchor DPF migration; Current BS for terminal MS S service can't obtain the address of current AnchorDPF; The follow-up process that switches continues the address of in store former Anchor DPF, if can mistake be carried this address to target BS; Cause correctly to be established to the data channel of the current Anchor DPF in terminal, thereby make switching normally to accomplish.

Summary of the invention

The embodiment of the invention discloses the method for obtaining grappling data channel functional entity address, to solve after the corresponding Anchor DPF migration in terminal, BS or Target ASN-GW can't obtain the problem of current Anchor DPF address, terminal.

The technical scheme that the embodiment of the invention is taked is respectively:

A kind of method of obtaining grappling data channel functional entity address comprises:

After the corresponding grappling data channel functional entity Anchor DPF in terminal moved, Anchor DPF that the terminal is current or current ASN-GW sent a notification message to serving BS, carry current Anchor DPF address, terminal in the said notification message.

A kind of method of obtaining grappling data channel functional entity address comprises:

Target BS receives the handoff request message from serving BS;

If there is not the address of the current Anchor DPF of carried terminal in the described request message, target BS then sends a request message to the corresponding Anchor Authenticator in terminal, and described request message is used for current Anchor DPF address, requesting terminal;

Reception carries current Anchor DPF address, terminal from the response message of said Anchor Authenticator in the said response message.

A kind of method of obtaining grappling data channel functional entity address comprises:

Target BS receives the switch acknowledgment message or the receiving terminal of serving BS broadcasts transmission and goes into network information from the switching of eating dishes without rice or wine to initiate;

If said target BS confirms self not have the current Anchor DPF address at terminal, then send a request message to the corresponding Anchor Authentictor in terminal, described request message is used for current Anchor DPF address, requesting terminal;

Reception carries current Anchor DPF address, terminal from the response message of said Anchor Authenticator in the said response message.

A kind of method of obtaining grappling data channel functional entity address comprises:

Data Path registration message or the Data Path pre-registration message that sends target ASN-GW receiving target base station carry the address of the service ASN-GW at terminal in the said message;

Target ASN-GW sends a request message to the service ASN-GW at terminal according to the address of said service ASN-GW, and described request message is used for current Anchor DPF address, requesting terminal;

Reception carries current Anchor DPF address, terminal from the response message of said service ASN-GW in the said response message.

Use the foregoing description technical scheme, the embodiment of the invention also discloses the device that obtains grappling data channel functional entity address, the technical scheme of being taked is respectively:

A kind of device comprises:

Confirm module: be used to confirm that the corresponding grappling data channel functional entity Anchor DPF in terminal moves; And notice sending module;

Sending module: be used for sending a notification message, carry current Anchor DPF address, terminal in the said notification message to serving BS.

A kind of device comprises:

Judge module: be used for judging the address that whether carries the current Anchor DPF in terminal from the handoff request message of serving BS; If not then notify sending module;

Sending module: be used for sending a request message to the corresponding Anchor Authenticator in terminal, described request message is used for current Anchor DPF address, requesting terminal;

Receiver module: be used to receive response message, carry current Anchor DPF address, terminal in the said response message from said Anchor Authenticator.

A kind of device comprises:

Receiver module: switch acknowledgment message or terminal the network information of going into that is used to receive serving BS broadcasts from eating dishes without rice or wine to initiate; And notice sending module;

Sending module: after confirming that target BS does not have current Anchor DPF address, terminal, the Anchor Authentictor corresponding to the terminal sends a request message, and described request message is used for current Anchor DPF address, requesting terminal;

Acquisition module: be used to receive response message, carry current Anchor DPF address, terminal in the said response message from said Anchor Authenticator.

A kind of device comprises:

Receiver module: be used to receive Data Path registration message or Data Path pre-registration message, carry the service ASN-GW address at terminal in the said message from target BS;

Sending module: be used for the address according to said service ASN-GW, send a request message to the service ASN-GW at terminal, described request message is used for current Anchor DPF address, requesting terminal;

Acquisition module: be used to receive response message, carry current Anchor DPF address, terminal in the said response message from said service ASN-GW.

Described method of the embodiment of the invention and device; After can making that the corresponding Anchor DPF in terminal moves; BS or Target ASN-GW can obtain current Anchor DPF address, terminal, further, and when guaranteeing to switch; The correct data channel that is established to the current Anchor DPF in terminal is accomplished handoff procedure smoothly.

Description of drawings

Fig. 1 is a WIMAX system configuration sketch map;

Fig. 2 moves back WIMAX system configuration sketch map for MSS;

Fig. 3 obtains the method flow diagram of Anchor DPF address for one embodiment of the invention;

Fig. 4 obtains the method flow diagram of Anchor DPF address for another embodiment of the present invention;

Fig. 5 obtains the method flow diagram of Anchor DPF address for another embodiment of the present invention;

Fig. 6 obtains the method flow diagram of Anchor DPF address for another embodiment of the present invention;

Fig. 7 obtains the device sketch map of Anchor DPF address for one embodiment of the invention;

Fig. 8 obtains the device sketch map of Anchor DPF address for another embodiment of the present invention;

Fig. 9 obtains the device sketch map of Anchor DPF address for another embodiment of the present invention.

Embodiment

Embodiment one

In the present embodiment, after the corresponding Anchor DPF migration in terminal, current new Anchor DPF sends a notification message to serving BS (Serving BS), the current new AnchorDPF address of notification service base station terminal, with reference to figure 3:

Step 101, Anchor DPF moves flow process;

The address of the corresponding Anchor DPF in terminal from the address transfer at former ASN place to current ASN place; For example because above-mentioned Interface R4 is resource-constrained; Or the Interface R3 resource of former ASN is nervous; Or in order to reduce data transmission delay (reducing the ASN quantity of data process), migration has taken place in Anchor DPF.

Step 102, the Anchor DPF of the Anchor DPF among current ASN-GW or the current ASN-GW in former ASN-GW sends the migration success message;

For example: current Anchor DPF or current ASN-GW send Anchor_DPF_HO_RSP (success) message to former Anchor DPF, inform that former Anchor DPF moves successfully.

Step 103, the Anchor DPF among the current ASN-GW sends a notification message to serving BS, the Anchor DPF address of the current correspondence of notification service base station terminal;

For example: current Anchor DPF sends Anchor_DPF_HO_Indication message to Serving BS; Inform the Anchor DPF address that Serving BS terminal is current; The current new Anchor DPF address of carried terminal in the message can also identify former Anchor DPF address by carried terminal.

Step 104, serving BS returns acknowledge message to current Anchor DPF.

After Serving BS receives above-mentioned Indication message,, and can reply Anchor_DPF_HO_Ack message, show that the Anchor DPF at terminal upgrades successfully to current Anchor DPF with the Anchor DPF address of upgrading its preservation counterpart terminal.

Accordingly, the invention also discloses a kind of device,, comprising: confirm module, sending module with reference to figure 7;

Confirm module: be used to confirm that the corresponding grappling data channel functional entity Anchor DPF in terminal moves; After confirming to move, the notice sending module;

Sending module: be used for sending a notification message, carry current Anchor DPF address, terminal in the said notification message to serving BS; With the current Anchor DPF address of notification service base station terminal.

The current Anchor DPF in terminal sends the migration success message to former Anchor DPF, confirms that then migration has taken place the module affirmation corresponding grappling data channel functional entity Anchor DPF in terminal;

Described device is ASN-GW, or is the Anchor DPF functional entity among the ASN-GW.

The described method and apparatus of the embodiment of the invention; After the corresponding Anchor DPF in terminal moved, the current new Anchor DPF in said terminal initiatively sent message, the Anchor DPF address that the notification service base station is new to serving BS; Thereby make serving BS obtain new current Anchor DPF address; When follow-up switching takes place, guaranteed the correct data channel that is established to the current Anchor DPF in terminal, thereby the handoff procedure of follow-up generation is accomplished smoothly.

Embodiment two

In the present embodiment, in terminal switching process, target BS (Target BS) is after receiving the handoff request message of not carrying Anchor DPF address information; Initiatively to corresponding current Anchor DPF address, AnchorAuthenticator requesting terminal, terminal; Anchor Authenticator is a functional entity that is arranged in ASN-GW, is the authenticator at terminal, preserves terminal related information; Major function is: as the Client of AAA, assist authentication is carried out at the terminal; Preserve and be produced as the required safe context of terminal service; The functional entity that needs given in the distribution security context; Preserve the related context information of terminal in network, and offer the entity that needs etc.; This method is with reference to figure 4:

Step 201, target BS receives the handoff request message of sending from serving BS broadcasts;

In this step; Serving BS sends HO Request request message to Target BS, after Target BS receives, if find not have in the described request message address information of the current Anchor DPF of carried terminal; Then carry out subsequent step, otherwise stop this flow process.

Step 202, target BS sends a request message the Anchor DPF address that the requesting terminal is current to the corresponding Anchor Authenticator in terminal;

For example: Target BS sends Anchor_DPF_Query message to the corresponding Anchor Authenticator in terminal, and the sign at portability terminal in the message requires the Anchor DPF address of the current correspondence of AnchorAuthenticator feedback terminal.

Usually, the corresponding Anchor Authenticator in terminal confirms when networking, and possibly possibly change owing to reason or the other reasons that move at the terminal, therefore, possibly be arranged in target ASN-GW, also can be arranged in other ASN-GW.

Step 203, Anchor Authenticator sends response message to target BS, the Anchor DPF address of the current correspondence in notification target BS terminal;

For example: Anchor Authenticator sends Anchor_DPF_Response message to target BS, carries the Anchor DPF address of the current correspondence in terminal in the message, the sign of going back the portability terminal in addition.

After target BS has obtained the Anchor DPF address of the current correspondence in terminal, just can set up the data channel with AnchorDPF, to accomplish the process of switching.

Accordingly, the invention also discloses a kind of device,, comprising with reference to figure 8:

Judge module: be used for judging the address that whether carries the current Anchor DPF in terminal from the handoff request message of serving BS; If not then notify sending module;

Sending module: be used for sending a request message to the corresponding Anchor Authenticator in terminal, described request message is used for current Anchor DPF address, requesting terminal;

Receiver module: be used to receive response message, carry current Anchor DPF address, terminal in the said response message from said Anchor Authenticator.

Said device is the base station, or is integrated in the base station as the functional module of base station.

In another embodiment; Target BS is when receiving the handoff request message of serving BS broadcasts; Can be temporarily not (not in this case to the address of Anchor Authenticator inquiry Anchor DPF; BS does not set up data link with Anchor DPF in advance in handoff preparation phase), and after receiving from the serving BS broadcasts switch acknowledgment message; If also do not obtain the address of the corresponding Anchor DPF in terminal, just inquire about the address of Anchor DPF so this time to the corresponding Anchor Authenticator in terminal.With reference to figure 5, specific as follows:

Step 301, the serving BS broadcasts at terminal is initiated handoff request to target BS, sends handoff request HO Request message to target BS.

Step 302 after target BS is received, is replied switching response message to serving BS broadcasts;

Step 303, serving BS broadcasts is sent switch acknowledgment message to target BS;

Step 304; After target BS is received the switch acknowledgment message of serving BS broadcasts, confirm that the terminal will switch to this target BS, if the target BS inquiry self does not have current Anchor DPF address, terminal; Then send a request message to the corresponding Anchor Authentictor in terminal; The AnchorDPF address that the requesting terminal is current, request process is similar withstep 202, is not giving unnecessary details.

Step 305, Anchor Authenticator sends response message to target BS, the Anchor DPF address of the current correspondence in notification target BS terminal;

In another embodiment; After thestep 302; Target BS possibly not received the switch acknowledgment message of serving BS broadcasts, and then target BS is receiving after the terminal goes into network information from the switching of eating dishes without rice or wine to initiate, if the target BS inquiry self does not have current Anchor DPF address, terminal; Then send a request message the Anchor DPF address that the requesting terminal is current to the corresponding AnchorAuthentictor in terminal.

After target BS has obtained the Anchor DPF address of the current correspondence in terminal, just can set up the data channel with AnchorDPF, to accomplish the process of switching.

Accordingly, the invention also discloses a kind of device,, comprising with reference to figure 9:

Receiver module: switch acknowledgment message or terminal the network information of going into that is used to receive serving BS broadcasts from eating dishes without rice or wine to initiate; And notice sending module;

Sending module: after confirming that target BS does not have current Anchor DPF address, terminal, the Anchor Authentictor corresponding to the terminal sends a request message, and described request message is used for current Anchor DPF address, requesting terminal;

Acquisition module: be used to receive response message, carry current Anchor DPF address, terminal in the said response message from said Anchor Authenticator.

Said device is the base station, or is integrated in the base station as the functional module of base station.

Described method of the embodiment of the invention and device; In handoff procedure; Initiatively send a request message through target BS to the corresponding Anchor Authentictor in terminal; Obtain current Anchor DPF address, terminal, thereby the correct data channel that is established to the current Anchor DPF in terminal is accomplished handoff procedure smoothly.

Embodiment three

In the present embodiment, the ASN-GW at target BS place (that is: Target ASN-GW, target ASN-GW) sends a request message to the Serving at terminal ASN-GW, obtains the address of the current AnchorDPF in terminal.With reference to figure 6:

Step 401, Serving BS sends HO Request handoff request message to Target BS, carries the address of the Serving ASN-GW at terminal in the message;

Step 402, the ASN-GW (Target ASN-GW) of Target BS in its corresponding ASN (Target ASN) sends Data Path registration message or Data Path pre-registration message, the address of carrying Serving ASN-GW in the message;

Step 403, Target ASN-GW is to current Anchor DPF address, the Serving at terminal ASN-GW requesting terminal.

Target ASN-GW sends the Anchor_DPF_Query request message according to the address of Serving ASN-GW to Serving ASN-GW, to obtain current Anchor DPF address, terminal;

Step 404, Serving ASN-GW replys response message to Target ASN-GW, carries current Anchor DPF address, terminal in the said corresponding message.

Step 403, the process of 404 request address, with step 202,203 is similar, do not giving unnecessary details.

After Target ASN-GW has obtained the Anchor DPF address of the current correspondence in terminal, just can set up the data channel with Anchor DPF, to accomplish the process of switching.

Accordingly, the embodiment of the invention also discloses a kind of device,, comprising with reference to figure 9:

Receiver module: be used to receive Data Path registration message or Data Path pre-registration message, carry the Serving ASN-GW address at terminal in the said message from target BS;

Sending module: be used for the address according to said Serving ASN-GW, send a request message to the ServingASN-GW at terminal, described request message is used for current Anchor DPF address, requesting terminal;

Acquisition module: be used to receive response message, carry current Anchor DPF address, terminal in the said response message from said Serving ASN-GW.

Said device is target ASN-GW, or is integrated among the target ASN-GW as the functional module of target ASN-GW.

Described method of the embodiment of the invention and device; In the handoff procedure; ASN-GW through the target BS place sends a request message to the Serving at terminal ASN-GW; Obtain the address of the current AnchorDPF in terminal, thereby the correct data channel that is established to the current Anchor DPF in terminal has guaranteed that handoff procedure accomplishes smoothly.

Above-described specific embodiment; The object of the invention, scheme and beneficial effect have been carried out further explain, and institute it should be understood that the above is merely specific embodiment of the present invention; And be not used in qualification protection scope of the present invention; All within spirit of the present invention and principle, any modification of being made, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (10)

Translated fromChinese

1.一种获取锚定数据通道功能实体地址的方法，其特征在于，包括：1. A method for obtaining an anchor data channel functional entity address, comprising:终端对应的锚定数据通道功能实体Anchor DPF发生迁移后，终端当前的Anchor DPF或当前的ASN-GW中的Anchor DPF向服务基站发送通知消息，所述通知消息中携带有终端当前的Anchor DPF地址。After the anchor data path function entity Anchor DPF corresponding to the terminal is migrated, the current Anchor DPF of the terminal or the Anchor DPF in the current ASN-GW sends a notification message to the serving base station, and the notification message carries the current Anchor DPF address of the terminal .2.如权利要求1所述的方法，其特征在于，该方法进一步包括：所述服务基站根据所述通知消息更新所述终端对应的Anchor DPF地址，并向所述当前的Anchor DPF或当前的ASN-GW返回确认消息。2. The method according to claim 1, further comprising: the serving base station updating the Anchor DPF address corresponding to the terminal according to the notification message, and sending the address to the current Anchor DPF or the current Anchor DPF ASN-GW returns a confirmation message.3.一种获取锚定数据通道功能实体地址的方法，其特征在于，包括：3. A method for obtaining an anchor data channel functional entity address, characterized in that it comprises:目标基站接收来自服务基站的切换请求消息；The target base station receives a handover request message from the serving base station;如果所述请求消息中没有携带终端当前的Anchor DPF的地址，目标基站则向终端对应的Anchor Authenticator发送请求消息，所述请求消息用于请求终端当前的Anchor DPF地址；If the request message does not carry the address of the current Anchor DPF of the terminal, the target base station sends a request message to the Anchor Authenticator corresponding to the terminal, and the request message is used to request the current Anchor DPF address of the terminal;所述目标基站接收来自所述Anchor Authenticator的响应消息，所述响应消息中携带有终端当前的Anchor DPF地址。The target base station receives a response message from the Anchor Authenticator, where the response message carries the current Anchor DPF address of the terminal.4.一种获取锚定数据通道功能实体地址的方法，其特征在于，包括：4. A method for obtaining an anchor data channel functional entity address, comprising:目标BS接收服务BS发送的切换确认消息或接收终端从空口发起的切换入网消息；The target BS receives the handover confirmation message sent by the serving BS or receives the handover network access message initiated by the terminal from the air interface;如果所述目标BS确认自身没有终端的当前的Anchor DPF地址，则向终端对应的Anchor Authenticator发送请求消息，所述请求消息用于请求终端当前的Anchor DPF地址；If the target BS confirms that it does not have the current Anchor DPF address of the terminal, it sends a request message to the corresponding Anchor Authenticator of the terminal, and the request message is used to request the current Anchor DPF address of the terminal;所述目标基站接收来自所述Anchor Authenticator的响应消息，所述响应消息中携带有终端当前的Anchor DPF地址。The target base station receives a response message from the Anchor Authenticator, where the response message carries the current Anchor DPF address of the terminal.5.一种获取锚定数据通道功能实体地址的方法，其特征在于，包括：5. A method for obtaining an anchor data channel functional entity address, comprising:目标ASN-GW接收目标基站发送的Data Path注册消息或Data Path预注册消息，所述消息中携带有终端的服务ASN-GW的地址； The target ASN-GW receives the Data Path registration message or the Data Path pre-registration message sent by the target base station, and the message carries the address of the serving ASN-GW of the terminal;目标ASN-GW根据所述服务ASN-GW的地址，向终端的服务ASN-GW发送请求消息，所述请求消息用于请求终端当前的Anchor DPF地址；The target ASN-GW sends a request message to the serving ASN-GW of the terminal according to the address of the serving ASN-GW, and the request message is used to request the current Anchor DPF address of the terminal;所述目标ASN-GW接收来自所述服务ASN-GW的响应消息，所述响应消息中携带有终端当前的Anchor DPF地址。The target ASN-GW receives a response message from the serving ASN-GW, and the response message carries the current Anchor DPF address of the terminal.6.如权利要求5所述的方法，其特征在于，该方法之前进一步包括：6. The method of claim 5, further comprising:目标基站接收来自服务基站的切换请求消息，所述切换请求消息中携带有终端的服务ASN-GW的地址。The target base station receives a handover request message from the serving base station, where the handover request message carries the address of the serving ASN-GW of the terminal.7.一种获取锚定数据通道功能实体地址的装置，其特征在于，包括：7. A device for obtaining the address of an anchor data channel function entity, characterized in that it comprises:确认模块：用于确认终端对应的锚定数据通道功能实体Anchor DPF发生迁移；并通知发送模块；Confirmation module: used to confirm that the anchor data channel functional entity Anchor DPF corresponding to the terminal has migrated; and notify the sending module;发送模块：用于向服务基站发送通知消息，所述通知消息中携带有终端当前的Anchor DPF地址。Sending module: used to send a notification message to the serving base station, the notification message carrying the current Anchor DPF address of the terminal.8.一种获取锚定数据通道功能实体地址的装置，其特征在于，包括：8. A device for obtaining the address of an anchor data channel function entity, characterized in that it comprises:判断模块：用于判断来自服务基站的切换请求消息中是否携带有终端当前的Anchor DPF的地址；如果没有则通知发送模块；Judging module: used to judge whether the handover request message from the serving base station carries the address of the terminal's current Anchor DPF; if not, then notify the sending module;发送模块：用于向终端对应的Anchor Authenticator发送请求消息，所述请求消息用于请求终端当前的Anchor DPF地址；Sending module: used to send a request message to the Anchor Authenticator corresponding to the terminal, and the request message is used to request the current Anchor DPF address of the terminal;接收模块：用于接收来自所述Anchor Authenticator的响应消息，所述响应消息中携带有终端当前的Anchor DPF地址。A receiving module: used to receive a response message from the Anchor Authenticator, the response message carrying the current Anchor DPF address of the terminal.9.一种获取锚定数据通道功能实体地址的装置，其特征在于，包括：9. A device for obtaining the address of an anchor data channel functional entity, characterized in that it comprises:接收模块：用于接收服务BS的切换确认消息或终端从空口发起的入网消息；并通知发送模块；Receiving module: used to receive the handover confirmation message of the serving BS or the network access message initiated by the terminal from the air interface; and notify the sending module;发送模块：确认目标BS没有终端当前的Anchor DPF地址后，向终端对应的Anchor Authenticator发送请求消息，所述请求消息用于请求终端当前的Anchor DPF地址；Sending module: after confirming that the target BS does not have the current Anchor DPF address of the terminal, send a request message to the Anchor Authenticator corresponding to the terminal, and the request message is used to request the current Anchor DPF address of the terminal;获取模块：用于接收来自所述Anchor Authenticator的响应消息，所述响应消息中携带有终端当前的Anchor DPF地址。 An acquisition module: configured to receive a response message from the Anchor Authenticator, the response message carrying the current Anchor DPF address of the terminal. the10.一种获取锚定数据通道功能实体地址的装置，其特征在于，包括：10. A device for obtaining the address of an anchor data channel functional entity, comprising:接收模块：用于接收来自目标基站的Data Path注册消息或Data Path预注册消息，所述消息中携带有终端的服务ASN-GW地址；Receiving module: used to receive a Data Path registration message or a Data Path pre-registration message from the target base station, wherein the message carries the service ASN-GW address of the terminal;发送模块：用于根据所述服务ASN-GW地址，向终端的服务ASN-GW发送请求消息，所述请求消息用于请求终端当前的Anchor DPF地址；Sending module: used to send a request message to the serving ASN-GW of the terminal according to the serving ASN-GW address, and the request message is used to request the current Anchor DPF address of the terminal;获取模块：用于接收来自所述服务ASN-GW的响应消息，所述响应消息中携带有终端当前的Anchor DPF地址。 An acquisition module: used to receive a response message from the serving ASN-GW, where the response message carries the current Anchor DPF address of the terminal. the

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