CN102369761B

CN102369761B - Processing method and equipment for acquiring context

Info

Publication number: CN102369761B
Application number: CN201080001702.1A
Authority: CN
Inventors: 陆峰; 吴问付
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2010-05-28
Filing date: 2010-05-28
Publication date: 2014-06-11
Anticipated expiration: 2030-05-28
Also published as: CN102369761A; WO2011147098A1

Abstract

A processing method for acquiring context in communication technology field is provided. A mobility management element (MME) acquires information about spare wireless access network elements. The MME sends messages to said spare wireless access network elements, and said messages include said context of user equipment. An embodiment in the present invention also provides an MME and a wireless access network element. The embodiment enables an MME to send context of user equipment to one or more spare wireless access network elements, to ensure that the spare wireless access network elements acquire said context of user equipment in the case of X2 interfaces being invalid or being not used, thus ensuring session service of user equipment is not interrupted after handover is finished.

Description

One is obtained contextual processing method and equipment

Technical field

The present invention relates to communication technical field, relate in particular to one and obtain contextual processing method and equipment.

Background of invention

At present, at third generation collaborative project (3GPP, 3rd Generation Partnership Project) network environment in, for the subscriber equipment (in connection status) that carries out business, if carry out high-speed mobile between multiple communities (cell) time, for example, in the environment of high-speed railway, due to reasons such as Doppler frequency deviation effects, very easily there is being switched to the situation of Target cell failure, or handover success but current user equipment are in the sight such as its wireless link of cell edge is unavailable, these all easily cause subscriber equipment session service to interrupt, affect user's business experience.

Prior art has proposed a kind of for multiple target changing method, source wireless access network element is in the time doing switch decision to subscriber equipment, directly send handover request to multiple Target Wireless access network elements (wireless access network element that multiple Target cells are corresponding), each Target Wireless access network elements is being received the context that can preserve its UE after handover request message, and be described user equipment allocation respective resources etc., in addition source wireless access network element receives after the handover request ack message of all Target Wireless access network elements, need to determine and send a response message to described subscriber equipment.Because described multiple Target Wireless access network elements have been known the context of described UE by above-mentioned flow process, as long as while making like this UE be switched in described multiple Target Wireless access network elements, this UE can access again at Target Wireless access network elements, makes this UE can under connection status, keep the continuity of business.

Inventor finds realizing in process of the present invention, and prior art at least exists following shortcoming:

There is X2 interface because prior art requires source wireless access network element and all Target Wireless access network elements, the context of UE could be sent to all Target Wireless access network elements; Further, also because all Target Wireless access network elements know that it is that the switching of subscriber equipment is prepared that the contextual while all needs to distribute corresponding resource, causes the waste of resource.

In sum, it is unavailable or do not use in the situation of X2 interface and cannot work for X2 interface that prior art is obtained contextual processing method, make described all Target Wireless access network elements cannot know the context of UE, thereby probably cause subscriber equipment session service to interrupt, affect user's business experience; And Target Wireless access network elements all in such scheme are knowing that the processing after the context of UE can cause the wasting of resources and process complicated defect.

Summary of the invention

The embodiment of the present invention provides one to obtain contextual processing method and equipment, make unavailable at X2 interface or do not use alternative wireless access network element in X2 interface situation can know the context of UE, ensureing that the session service that has switched rear subscriber equipment does not interrupt.

The embodiment of the present invention is achieved through the following technical solutions:

The embodiment of the present invention provides one to obtain contextual processing method, comprising:

Source mobile management network element receives the handoff requirement message that source wireless access network network element sends, and described handoff requirement message is carried alternative wireless access network net element information; Or source mobile management network element configures and knows alternative wireless access network net element information according to self; Or, the message that source mobile management network element receiving target side shifting managed network element sends, the message that described target side mobile management network element sends is carried alternative wireless access network net element information;

Described source mobile management network element sends message to the alternative wireless access network element comprising in described alternative wireless access network net element information, the context that the message that described source mobile management network element sends comprises subscriber equipment.

The message that target side mobile management network element reception sources side shifting managed network element sends, the message that described source mobile management net element sends is carried alternative wireless access network net element information; Or target side mobile management network element configures and knows alternative wireless access network net element information according to self; Or, the handoff request acknowledgment message that target side mobile management network element receiving target side wireless access network element sends, described handover request is replied and is carried alternative wireless access network net element information;

Described target side mobile management network element sends message to the alternative wireless access network element comprising in described alternative wireless access network net element information, the context that the message that described target side mobile management network element sends comprises subscriber equipment.

The message that alternative mobile management network element reception sources side shifting managed network element or target side mobile management net element send, the message that described source mobile management net element or target side mobile management net element send is carried the context of alternative wireless access network net element information and described subscriber equipment;

The alternative wireless access network element that described alternative mobile management network element comprises to described alternative wireless access network net element information sends message, the context that described message comprises subscriber equipment.

The embodiment of the present invention provides a kind of mobile management network element, comprising:

Acquiring unit, for obtaining alternative wireless access network net element information, comprising: receive the handoff requirement message that source wireless access network network element sends, described handoff requirement message is carried alternative wireless access network net element information; Or, configure and know alternative wireless access network net element information according to self; Or, the message that receiving target side shifting managed network element sends, the message that described target side mobile management network element sends is carried alternative wireless access network net element information;

Message sending unit, sends message for the alternative wireless access network element comprising to described alternative wireless access network net element information, the context that the message that described source mobile management network element sends comprises subscriber equipment.

Acquiring unit, for obtaining alternative wireless access network net element information, comprising: the message that reception sources side shifting managed network element sends, and the message that described source mobile management net element sends is carried alternative wireless access network net element information; Or, configure and know alternative wireless access network net element information according to self; Or, the handoff request acknowledgment message that receiving target side wireless access network element sends, described handover request is replied and is carried alternative wireless access network net element information;

Message sending unit, sends message for the alternative wireless access network element comprising to described alternative wireless access network net element information, the context that the message that described target side mobile management network element sends comprises subscriber equipment.

Acquiring unit, be used for obtaining alternative wireless access network net element information, comprise: the message that reception sources side shifting managed network element or target side mobile management net element send, the message that described source mobile management net element or target side mobile management net element send is carried the context of alternative wireless access network net element information and subscriber equipment;

Message sending unit, sends message, the context that described message comprises subscriber equipment for the alternative wireless access network element comprising to described alternative wireless access network net element information.

The embodiment of the present invention provides a kind of wireless access network element, comprising:

The first receiving element, for receipt message, carries the context of subscriber equipment in described message;

Whether recognition unit, for identifying described message for forwarding the context of described subscriber equipment;

The second receiving element, the radio resource control information sending for receiving described subscriber equipment;

Resource allocation unit, receives after the radio resource control information of described subscriber equipment for the context and the second receiving element that forward described subscriber equipment for identify described message at described recognition unit, is described user equipment allocation interface-free resources.

The technical scheme being provided by the invention described above embodiment can be found out, the present embodiment has been realized mobile management network element the context of subscriber equipment has been sent to one or more alternative wireless access network elements, make unavailable at X2 interface or do not use in X2 interface situation, ensure that alternative wireless access network element knows the context of described subscriber equipment, thereby ensured that the session service that has switched rear subscriber equipment does not interrupt.

Brief Description Of Drawings

Fig. 1 is that the embodiment of the present invention one is obtained contextual process flow figure;

Fig. 2 is that the embodiment of the present invention two is obtained contextual process flow figure;

Fig. 3 is that the embodiment of the present invention three is obtained contextual process flow figure;

Fig. 4 is the embodiment of the present invention four flow charts;

Fig. 5 is the embodiment of the present invention five flow charts;

Fig. 6 is the embodiment of the present invention six flow charts;

Fig. 7 is the embodiment of the present invention seven flow charts;

Fig. 8 is the embodiment of the present invention eight mobile management network element structural representations;

Fig. 9 is the embodiment of the present invention nine wireless access network element structural representations.

Implement mode of the present invention

Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.

Embodiment mono-: Fig. 1 is that the present embodiment one obtains contextual process flow figure, and the method comprises following operation:

Step 101: source mobile management network element receives the handoff requirement message that source wireless access network network element sends, and described handoff requirement message is carried alternative wireless access network net element information; Or source mobile management network element configures and knows alternative wireless access network net element information according to self; Or, the message that source mobile management network element receiving target side shifting managed network element sends, the message that described target side mobile management network element sends is carried alternative wireless access network net element information;

Wherein, the message that described source mobile management network element receiving target side shifting managed network element sends, the message that described target side mobile management network element sends is carried alternative wireless access network net element information and is specifically comprised:

The forwarding relocation response message that described source mobile management network element receiving target side shifting managed network element sends, described forwarding relocation response message is carried alternative wireless access network net element information; Or,

The forwarding reorientation requirement message that described source mobile management network element receiving target side shifting managed network element sends, described forwarding reorientation requirement message is carried alternative wireless access network net element information.

The alternative wireless access network net element information of method know to(for) source wireless access network element is introduced in embodiment in the back in detail.

Step 102: described source mobile management network element sends message to the alternative wireless access network element comprising in described alternative wireless access network net element information, the context that the message that described source mobile management network element sends comprises subscriber equipment.

Described source mobile management network element sends message to described alternative wireless access network element can prepare message or handover request message for switching.Wherein, the contextual method that described alternative wireless access network element prepares to obtain message or handover request message subscriber equipment from described switching specifically comprises:

Message is prepared in described switching or handover request message is carried the instruction of forwarding customer equipment context; Make described alternative wireless access network element prepare the described forwarding customer equipment context instruction of carrying in message or handover request message according to described switching, know that described switching preparation message or handover request message are for forwarding the context of described subscriber equipment, described alternative wireless access network element obtains the context of described subscriber equipment.Or,

Message is prepared in described switching or handover request message is carried target identification, described alternative wireless access network element is prepared the target identification information of carrying in message or handover request message according to described switching, differentiating described alternative wireless access network element is not target side wireless access network element, and described alternative wireless access network element obtains the context of described subscriber equipment.

Described alternative wireless access network element does not distribute interface-free resources after obtaining the context of described subscriber equipment, for example receive at described alternative wireless access network element, after the radio resource control information (RRC connects reconfiguration request message or message has been reshuffled in RRC connection) of described subscriber equipment transmission, described alternative wireless access network element is described user equipment allocation interface-free resources.

The present embodiment has been realized mobile management network element the context of subscriber equipment has been sent to one or more alternative wireless access network elements, make unavailable at X2 interface or do not use in X2 interface situation, ensure that alternative wireless access network element knows the context of described subscriber equipment, thereby ensured that the session service that has switched rear subscriber equipment does not interrupt.

In addition, described alternative wireless access network element does not distribute interface-free resources knowing after the context of described subscriber equipment, when switch failure or the switching of described subscriber equipment completes while finding that wireless link is unavailable, if when described subscriber equipment quarters at one of described alternative wireless access network element, can guarantee that described subscriber equipment is successfully reconstructed into described alternative wireless access network element, ensure the unbroken interface-free resources of simultaneously having saved of session service.

Embodiment bis-: Fig. 2 is that the present embodiment two obtains contextual processing process flow figure, and the method comprises following operation:

Step 201: the message that target side mobile management network element reception sources side shifting managed network element sends, the message that described source mobile management net element sends is carried alternative wireless access network net element information; Or target side mobile management network element configures and knows alternative wireless access network net element information according to self; Or, the handoff request acknowledgment message that target side mobile management network element receiving target side wireless access network element sends, described handover request is replied and is carried alternative wireless access network net element information;

The message that described target side mobile management network element reception sources side shifting managed network element sends, the message that described target side mobile management network element sends is carried alternative wireless access network net element information and is specifically comprised:

The forwarding RELOCATION REQUEST message that described target side mobile management network element reception sources side shifting managed network element sends, described forwarding RELOCATION REQUEST message is carried alternative wireless access network net element information; Or,

The forwarding reorientation requirement message that described target side mobile management network element reception sources side shifting managed network element sends, described forwarding reorientation requirement message is carried alternative wireless access network net element information.

The alternative wireless access network net element information of method know to(for) target side wireless access network element is introduced in embodiment in the back in detail.

Step 202: described target side mobile management network element sends message to the alternative wireless access network element comprising in described alternative wireless access network net element information, the context that the message that described target side mobile management network element sends comprises subscriber equipment.

Described target side mobile management network element sends message to described alternative wireless access network element and prepares message or handover request message for switching.Wherein, the contextual method that described alternative wireless access network element prepares to obtain message or handover request message subscriber equipment from described switching specifically comprises:

Message is prepared in described switching or handover request message is carried the instruction of forwarding customer equipment context; Described alternative wireless access network element is prepared the described forwarding customer equipment context instruction of carrying in message or handover request message according to described switching, know that described switching preparation message or handover request message are for forwarding the context of described subscriber equipment, described alternative wireless access network element obtains the context of described subscriber equipment.Or

Message is prepared in described switching or handover request message is carried target identification, it is not target side wireless access network element that the target identification information that described alternative wireless access network element prepares to carry in message or handover request message according to described switching is differentiated described alternative wireless access network element, and described alternative wireless access network element obtains the context of described subscriber equipment.

Embodiment tri-: Fig. 3 is that the present embodiment three obtains contextual processing process flow figure, and the method comprises following operation:

Step 301: the message that alternative mobile management network element reception sources side shifting managed network element or target side mobile management net element send, the message that described source mobile management net element or target side mobile management net element send is carried the context of alternative wireless access network net element information and subscriber equipment;

The message that described alternative mobile management network element reception sources side shifting managed network element or target side mobile management net element send, the message that described source mobile management net element or target side mobile management net element send is carried alternative wireless access network net element information and is specifically comprised:

The forwarding RELOCATION REQUEST message that described alternative mobile management network element reception sources side shifting managed network element or target side mobile management net element send, described forwarding RELOCATION REQUEST message is carried the context of alternative wireless access network net element information and described subscriber equipment; Or,

The forwarding reorientation requirement message that described alternative mobile management network element reception sources side shifting managed network element or target side mobile management net element send, described forwarding reorientation requirement message is carried the context of alternative wireless access network net element information and described subscriber equipment.

Step 302: the alternative wireless access network element that described alternative mobile management network element comprises to described alternative wireless access network net element information sends message, the context that described message comprises subscriber equipment.

Described alternative mobile management network element sends message to described alternative wireless access network element and prepares message or handover request message for switching.Wherein, the contextual method that described alternative wireless access network element prepares to obtain message or handover request message subscriber equipment from described switching specifically comprises:

For further understanding the present invention, with specific embodiment, the switching handling method described in the embodiment of the present invention is described in detail below.

Embodiment tetra-: as shown in Figure 4, the present embodiment provides one to obtain contextual processing method, specifically comprises:

S1 switching flow:

Step 400: switching flow is initiated in the decision-making of source wireless access network element.

Source wireless access network element receives the measurement report of user equipment to report, and switching flow is initiated in decision-making, the Target cell that decision-making is switched, and obtain alternative wireless access network net element information.Wherein, described source wireless access network element can be known described alternative wireless access network net element information from the measurement report of described user equipment to report, for example, or described source wireless access network element can self obtain (can configure or the mode such as calculating is obtained by network topological information) described alternative wireless access network net element information by configuration information.

Described alternative wireless access network element is defined as subscriber equipment in embodiments of the present invention in switching flow, for discovery wireless link after avoiding described subscriber equipment handoff failure or switching to complete unavailable, and the wireless access network element (wherein not comprising Target Wireless access network elements) of the described customer equipment context information of storage of selecting.Wherein, can comprise the mark of one or more alternative wireless access network element in described alternative wireless access network net element information, the present embodiment does not limit this.

Wherein, the mobile management network element of the corresponding ownership/service of described alternative wireless access network element can be source mobile management network element or target side mobile management network element or alternative mobile management net element.Wherein, described alternative mobile management network element refers to other mobile management network element except source mobile management network element and target side mobile management network element.

Wherein, the method that source wireless access network element obtains alternative wireless access network net element information specifically can include but not limited to following several mode:

1) source wireless access network element is known described alternative wireless access network net element information from the measurement report of the expansion of described user equipment to report.For example, subscriber equipment can be in the time of reporting measurement reports, the alternate location information that report of user equipment is advised, described alternate location information can be alternative cell information or alternative wireless access network net element information, this alternate location information can be that (particular user equipment how method the present embodiment of the alternative wireless access network element of decision-making does not limit) added up and drawn to subscriber equipment according to the movement locus of subscriber equipment, the measurement report specific implementation of expansion can be as follows: increase alternative target positional information (Backup Target Location Information) cell, make source wireless access network element obtain this alternative target positional information, if described alternate location information is alternative cell information, source wireless access network element is according to the alternative wireless access network net element information of alternative cell acquisition of information, if described alternate location information is alternative wireless access network net element information, source wireless access network element directly obtains alternative wireless access network net element information.Or,

2) source wireless access network element according to measurement report comprise of described user equipment to report other cell information except Target cell know described alternative wireless access network element letter.Now do not expand measurement report, source wireless access network element obtains corresponding wireless access network net element information according to other cell information except Target cell comprising on measurement report, and using this wireless access network net element information as alternative wireless access network net element information.Or,

3) source wireless access network element is according in source wireless access network net element information, target side wireless access network net element information, source mobility management network element information and target side mobility management network element information, at least one knows described alternative wireless access network net element information.The measurement report that now extending user equipment does not report, source wireless access network element is according to source wireless access network net element information, the target side wireless access network net element information of institute's decision-making, source mobility management network element information, in target side mobility management network element information, at least one is by self configuration information or by the alternative wireless access network net element information of Getting Network Topology Information, for example: source wireless access network element self has configured neighbours' wireless access network metamessage, source wireless access network element obtains respective neighbor wireless access network metamessage as alternative wireless access network net element information according to the target side wireless access network net element information matching configuration information of source wireless access network net element information and/or institute's decision-making, or, source wireless access network element self adds up according to the movement locus of subscriber equipment the alternative wireless access network net element information that (for example, according to the target side wireless access network net element information of source wireless access network net element information and/or institute's decision-making) draws.

Wherein, described alternative wireless access network element in the present embodiment can include but not limited to all or part neighbours' wireless access network element of source wireless access network element, and all or part neighbours' wireless access network element of target side wireless access network element, and all or part wireless access network element in source mobile management network element service range, and all or part wireless access network element in target side mobile management network element service range, and other at least one of other wireless access network element in source and target side mobile management network element service range (being in alternative mobile management network element service range) etc. not.

Step 401: source wireless access network element sends switching demand (Handover Required) message to source mobile management network element.

Wherein, in described handoff requirement message, comprise described alternative wireless access network net element information.

Wherein, if the Target cell of switching does not belong to source mobile management network element service range (being that MME changes), perform step 402; If MME does not change and exist the alternative wireless access network element of knowing (to be present in alternative mobile management net element service range), perform step 403 (not performing step 402) not in source mobile management network element service range; If MME does not change and alternative wireless access network element all in source mobile management network element service range, perform step 405 (not performing step 402-step 404).

Step 402: source mobile management network element sends and forwards re-positioning request (Forwarding Relocation Request) message to target side mobile management network element.

Concrete scheme 4A: source mobile management network element sends and forwards RELOCATION REQUEST message to target side mobile management network element, source mobile management network element sends message to alternative mobile management net element, and the message that described source mobile management network element sends to alternative mobile management net element is carried alternative wireless access network net element information and customer equipment context information.

In the forwarding RELOCATION REQUEST message that described source mobile management network element sends to target side mobile management network element, can carry alternative wireless access network net element information, wherein said alternative wireless access network net element information can be: all alternative wireless access network net element information that source mobile management network element is known in step 401; Or, not alternative wireless access network net element information (being present in the alternative wireless access network net element information in alternative mobile management net element service range and in target side mobile management net element service range) in source mobile management network element service range; Or, the alternative wireless access network net element information in target side mobile management net element service range.

Wherein, for scheme 4A, if source mobile management network element is known the alternative wireless access network element of existence and (is not present in alternative mobile management net element service range) in source mobile management network element service range and target side managed network element service range, need to perform step 403, be sent the message of carrying alternative wireless access network net element information by source mobile management network element to alternative mobile management network element.Wherein, for scheme 4A, the not execution sequence of conditioning step 402 and step 403.

Concrete scheme 4B: source mobile management network element sends and forwards RELOCATION REQUEST message to target side mobile management network element, target side mobile management network element sends message to alternative mobile management net element, and the message that described target side mobile management network element sends to alternative mobile management net element is carried alternative wireless access network net element information:

In the forwarding RELOCATION REQUEST message that described source mobile management network element sends to target side mobile management network element, carry alternative wireless access network net element information, wherein said alternative wireless access network net element information can be: all alternative wireless access network net element information that source mobile management network element is known in step 401; Or, not alternative wireless access network net element information (being present in the alternative wireless access network net element information in alternative mobile management net element service range and in target side mobile management net element service range) in source mobile management network element service range.

Wherein, for scheme 4B, if target side mobile management network element is known the alternative wireless access network element of existence and (is not present in alternative mobile management net element service range) in source mobile management network element service range and target side managed network element service range, need to perform step 404, be sent the message of carrying alternative wireless access network net element information by target side mobile management network element to alternative mobile management network element.

Step 403: source mobile management network element sends message to alternative mobile management network element.

Wherein, the message that described source mobile management network element sends to alternative mobile management network element can be to forward re-positioning request (Forwarding Relocation Request) message, or, can be a new message, for example forward reorientation demand (Forward Relocation Required) message (this enforcement does not limit this message name), specifically adopt any a piece of news the present embodiment not limit this.

Wherein, the message that described source mobile management network element sends to alternative mobile management network element comprises alternative wireless access network net element information and described customer equipment context information.The alternative wireless access network net element information that the message that described source mobile management network element sends to alternative mobile management network element comprises can be: all alternative wireless access network net element information that source mobile management network element is known in step 401; Or, not alternative wireless access network net element information (being present in the alternative wireless access network net element information in alternative mobile management net element service range and in target side mobile management net element service range) in source mobile management network element service range; Or, the alternative wireless access network net element information in alternative mobile management net element service range.

Wherein, the message that described source mobile management network element sends to alternative mobile management network element specifically includes but not limited to following several method:

1) message that described source mobile management network element sends to alternative mobile management network element also comprises forwarding indicates, for example forwarding contexts instruction (Forward UE Context Indicator), indicating this message is contextual forwarding re-positioning request or the forwarding reorientation requirement message for forwarding subscriber equipment, make the alternative mobile management network element that receives this forwarding re-positioning request or forward reorientation requirement message know context and the alternative wireless access network net element information of described subscriber equipment, but not switching/reorientation associative operation of performance objective side shifting managed network element (for example session connection of establishment and gateway), or,

2) message that described source mobile management network element sends to alternative mobile management network element also comprises target identification information, for example target identification (Target ID), alternative mobile management network element can for example, be differentiated by resolving the wireless access network network element ID (eNodeB ID) comprising in Target ID cell, if Target Wireless access network elements does not belong to current alternative mobile management network element, know that current mobile management network element is alternative mobile management network element instead of target side mobile management network element, make the alternative mobile management network element that receives this forwarding re-positioning request or forward reorientation requirement message know context and the alternative wireless access network net element information of described subscriber equipment, but not switching/reorientation associative operation of performance objective side shifting managed network element (for example session connection of establishment and gateway).

Wherein, described alternative mobile management network element can arrange the timer Backup_UE_Context_Timer that described contextual information is corresponding, in the time knowing the contextual information of subscriber equipment, start described timer, if UE rebuilds successfully at this alternative mobile management network element, remove described timer, if after described timer expiry, the contextual information of the described subscriber equipment of preserving can be removed, avoid the waste of storage resources on alternative mobile management network element.The time-out time of this timer can be by obtaining alternative mobile management network element self configuration or the message that can send to alternative mobile management network element from described source mobile management network element.

Step 404: target side mobile management network element sends message to alternative mobile management network element.

Wherein, the description of the message that the description of the message that described target side mobile management network element sends to alternative mobile management network element can send to alternative mobile management network element referring to the mobile management network element of source described in step 403 repeats no more herein.

Wherein, the processing of timer is set referring to the description of timer in step 403 in described alternative mobile management network element, repeats no more herein.

Wherein, step 403 and 404 is steps arranged side by side, can only carry out a step at the most wherein in the present embodiment.

Step 405: target side mobile management network element sends handover request (Handover Request) message to target side wireless access network element.

Wherein, the scene not changing for mobile management net element, above-mentioned target side mobile management network element is actually source mobile management network element, does not perform step 402 and step 404 before.

Wherein, receive the described handover request message that described target side mobile management network element sends, described target side wireless access network element is known UE contextual information, and distributes corresponding asset creation RAB (for example creating S1 carrying) etc., prepares for switching.

Step 406: target side wireless access network element sends handover request to target side mobile management network element and replys (Handover Request Acknowledge) message.

Step 407: mobile management network element sends message to alternative wireless access network element.

Wherein, described mobile management network element can comprise to alternative wireless access network element transmission message: the described alternative wireless access network element in its service range of knowing to it in source mobile management network element or target mobility management network element or alternative mobile management network element sends described message.

Wherein, the contextual information that comprises described subscriber equipment in the message that described mobile management network element sends to alternative wireless access network element, the contextual information of described subscriber equipment is obtained and preserved to the message that described alternative wireless access network element sends according to described mobile management network element.

Wherein, exist in multiple alternative wireless access network element situations, each alternative wireless access network element can receive the described message that its mobile management network element of serving/belonging to sends.In described alternative wireless access network element, can comprise the wireless access network element belonging in source mobile management network element service range, and/or belong to the wireless access network element in target side mobile management network element service range, and/or belong to the wireless access network element in alternative mobile management network element service range.

Wherein, the message that described mobile management network element (source mobile management network element or target mobility management network element or alternative mobile management network element) sends to alternative wireless access network element can be handover request (Handover Request) message, or, can be a new S1-AP message, for example switch and prepare (Handover Preparation) message (the present embodiment is not to limiting this message name), more than concrete employing which a piece of news the present embodiment does not limit this.

Wherein, the described message that described mobile management network element sends to described alternative wireless access network element specifically includes but not limited to following several method:

1) the described message that described mobile management network element sends to described alternative wireless access network element also comprises forwarding indicates, for example forwarding contexts instruction (Forward UE Context Indicator), indicating this handover request message is to forward the contextual handover request of subscriber equipment or switch to prepare message, and the alternative wireless network network element that makes to receive this handover request message is known the contextual information of described subscriber equipment and the relevant treatment (not being for example the corresponding interface-free resources of described user equipment allocation) for switching; Or,

2) the described message that described mobile management network element sends to described alternative wireless access network element also comprises target identification information, for example Target Cell Identifier (Target Cell ID), if Target Cell ID does not belong to current wireless access network elements, know that current wireless access network elements is alternative wireless access network element instead of target side wireless access network element, the alternative wireless network network element that makes to receive this handover request message is known the contextual information of described subscriber equipment and the relevant treatment (not being for example the corresponding interface-free resources of described user equipment allocation) for switching.

Wherein, described alternative wireless access network element can arrange the timer Temp_UE_Context_Timer that described contextual information is corresponding, in the time knowing the contextual information of subscriber equipment, start described timer, if UE is reconstructed into merit at this alternative wireless access network element, remove described timer, if after described timer expiry, the contextual information of the described subscriber equipment of preserving can be removed, avoid the waste of storage resources on alternative wireless access network element.The time-out time of this timer can be by obtaining alternative wireless access network element self configuration or the message that can send from its corresponding mobile management network element.

Wherein, the execution sequence of conditioning step 407 and step 405 not in the present embodiment.

Step 408: alternative wireless access network element sends response message to described mobile management network element.

Wherein, the response message that described alternative wireless access network element sends to described mobile management network element, can be handoff request acknowledgment message (Handover Request Acknowledge), or, can be that a new switching prepares to reply (Handover Preparation Ack) message.Specifically can include but not limited to following mode:

The described message that described alternative wireless access network element sends to described mobile management network element also comprises forwarding replys instruction, for example forward customer equipment context and reply instruction (Forward UE Context Ack Indicator), indicating this response message is the response message of described step 407, it not the handoff request acknowledgment message of the Target Wireless access network elements transmission at place, Target cell, make the described mobile management network element that receives this handoff request acknowledgment message confirm that described alternative wireless net member obtains the context of described subscriber equipment, but do not carry out switching/reorientation associative operation (for example trigger and create indirect forwarding tunnel (Create Indirect Data Forwarding Tunnel) or send switching command (Handover Command) message to source wireless access network element) of mobile management network element.

Wherein, this step 408 is optional, can select carry out or do not carry out, and the present embodiment does not limit this.

Step 409: alternative mobile management network element sends response message to source mobile management network element.

Wherein, the response message that alternative mobile management network element sends to described source mobile management network element can be a new message, for example forward reorientation demand response (Forward RelocationAck) message, or, can be to forward relocation response (Forward Relocation Response) message.Specifically can include but not limited to following mode:

The described response message that described alternative mobile management network element sends to described source mobile management net element also comprises forwarding replys instruction, for example forward customer equipment context and reply instruction (Forward UE ContextAck Indicator), the response message that instruction response message is described step 403, the source mobile management net element that makes to receive this response message confirms that alternative mobile management net element learns described alternative wireless access network net element information or confirms that contextual information that described wireless access network element successfully sends subscriber equipment is to described wireless access network element, now not switching/reorientation associative operation of performance objective side shifting managed network element (for example session connection of establishment and gateway) of source mobile management net element.

Wherein, this step 409 is optional, can select carry out or do not carry out, and the present embodiment does not limit this.

Wherein, this step 409 can be in the rear execution of step 403, or, can after step 408 (being that alternative wireless access network element sends response message to alternative mobile management net element), carry out, the present embodiment does not limit this.

Step 410: alternative mobile management network element sends response message to target side mobile management network element.

Wherein, the description of the response message that the description of the response message that alternative mobile management network element sends to described target side mobile management network element can send to source mobile management network element referring to alternative mobile management network element described in step 409 repeats no more herein.

Wherein, this step 410 is optional, can select carry out or do not carry out, and the present embodiment does not limit this.

Wherein, this step 410 can be in the rear execution of step 404, or, can after step 408 (being that alternative wireless access network element sends response message to alternative mobile management net element), carry out, the present embodiment does not limit this.

Step 411: target side mobile management network element sends and forwards relocation response (Forward Relocation Response) message to source mobile management network element.

If mobile management net element does not change, can not perform step 402 and this step 410.

Step 412: source mobile management network element sends switching command (Hnadover Command) message to source wireless access network element.

Step 413: carry out the residue flow process that S1 switches, comprising upgrading upstream and downstream user face transmission path, tracing section updating flow process etc. repeat no more herein.

In addition,, if described subscriber equipment completes and finds that wireless link is when unavailable carrying out described switching flow failure or carry out described switching, described subscriber equipment can be carried out and rebuild flow process at described alternative wireless access network element:

Step 414: described subscriber equipment sends RRC connection reconstruction request (RRC Connection Reestablishment Request) message and attempts the wireless access network element of rebuilding to described subscriber equipment.

If it is unavailable that described subscriber equipment knows that handoff failure or switching complete discovery wireless link, described subscriber equipment listening broadcast channel, select the cell information of knowing by broadcast message, described subscriber equipment sends RRC connection reconstruction request message and carries out the wireless access network element (being one of above-mentioned alternative wireless access network element) that community selects trial to rebuild to described subscriber equipment.

Step 415: described alternative wireless access network element sends RRC connection reconstruction (RRC Connection Reestablishment) message to described subscriber equipment.

If the wireless access network element that described subscriber equipment is attempted rebuilding is one of above-mentioned alternative wireless access network element, because described alternative wireless access network element obtains the context of described subscriber equipment by step 407, described alternative wireless access network element can send RRC connection reconstruction message to described subscriber equipment.Described wireless access network element can distribute corresponding resource to described UE, recovers RAB.

Step 416: described subscriber equipment sends RRC connection reconstruction and completes (RRC Connection Reestablishment Complete) message to described alternative wireless access network element.

Described subscriber equipment receives RRC connection reconstruction message, recovers SRB 1 (signaling radio bearer 1).

Step 417: described alternative wireless access network element sends RRC connection to described subscriber equipment and reshuffles (RRC Connection Reconfiguration) message.

Step 418: described subscriber equipment sends RRC connection and reshuffled (RRC Connection Reconfiguration Complete) message to described alternative wireless access network element.

Described subscriber equipment obtains and receives RRC and connect and reshuffle, and recovers SRB2 (signaling radio bearer 2) and DRB (data radio bearer 2).

Step 419: carry out the residue flow process of rebuilding flow process, comprising upgrading upstream and downstream user face transmission path, repeat no more herein.

In the embodiment of the present invention, source wireless access network element is known alternative wireless access network net element information in subscriber equipment switching flow, and make mobile management network element obtain described alternative wireless access network net element information, send the contextual information of described subscriber equipment to described alternative wireless access network element by described mobile management network element, make unavailable at X2 interface or do not use in X2 interface situation, ensure that alternative wireless access network element knows the context of described subscriber equipment, thereby described subscriber equipment is completed while finding that wireless link is unavailable in handoff failure or switching, described subscriber equipment can be known that contextual alternative wireless access network element is carried out and rebuilds flow process described, keep session not interrupt, reduce cutting off rate, improve user's experience.

Embodiment five: as shown in Figure 5, the present embodiment provides another to obtain contextual method, specifically comprises:

S1 switching flow:

Step 500: switching flow is initiated in the decision-making of source wireless access network element.

Source wireless access network element receives the measurement report of user equipment to report, and switching flow is initiated in decision-making, the Target cell that decision-making is switched.

Step 501: source wireless access network element sends switching demand (Handover Required) message to source mobile management network element.

Wherein, if the Target cell of switching does not belong to source mobile management network element service range (being that MME changes), perform step 502; If MME does not change and performs step 503 (not performing step 502).

Step 502: source mobile management network element sends and forwards re-positioning request (Forwarding Relocation Request) message to target side mobile management network element.

Step 503: target side mobile management network element sends handover request (Handover Request) message to target side wireless access network element.

Wherein, the scene not changing for mobile management net element, above-mentioned target side mobile management network element is actually source mobile management network element, does not perform step 502 before.

Wherein, receive after described handover request message, described target side wireless access network element can self obtain alternative wireless access network net element information by configuration information, specifically can include but not limited to: target side wireless access network element will be according to source wireless access network net element information, target side wireless access network net element information, source mobility management network element information, in target side mobility management network element information, at least one is by self configuration information or by the alternative wireless access network net element information of Getting Network Topology Information, for example target side wireless access network element self has configured neighbours' wireless access network metamessage, target side wireless access network element obtains respective neighbor wireless access network metamessage as alternative wireless access network net element information according to the target side wireless access network net element information matching configuration information of source wireless access network net element information and/or institute's decision-making, or, target side wireless access network element self adds up according to the movement locus of subscriber equipment the alternative wireless access network net element information that (for example, according to the target side wireless access network net element information of source wireless access network net element information and/or institute's decision-making) draws.

Wherein, described alternative wireless access network element in the present embodiment can include but not limited to all or part neighbours' wireless access network element of source wireless access network element, and all or part neighbours' wireless access network element of target side wireless access network element, and all or part wireless access network element in source mobile management network element service range, and all or part wireless access network element in target side mobile management network element service range, and other at least one of other wireless access network element in source and target side mobile management network element service range (in alternative mobile management network element service range) etc. not.

Step 504: target side wireless access network element sends handover request to target side mobile management network element and replys (Handover Request Acknowledge) message.

Wherein, the handoff request acknowledgment message that described target side wireless access network element sends has comprised its alternative wireless access network net element information (knowing by step 503) of knowing.

Step 505: target side mobile management network element sends message to alternative mobile management network element.

Wherein, the message that described target side mobile management network element sends to alternative mobile management network element can be to forward re-positioning request (Forwarding Relocation Request) message, or, can be a new message, for example forward reorientation demand (Forward Relocation Required) message (this enforcement does not limit this message name), specifically adopt any a piece of news the present embodiment not limit this.

Wherein, the message that described target side mobile management network element sends to alternative mobile management network element comprises alternative wireless access network net element information and described customer equipment context information.The alternative wireless access network net element information that the message that described target side mobile management network element sends to alternative mobile management network element comprises can be: all alternative wireless access network net element information that source mobile management network element is known in step 504; Or, the alternative wireless access network net element information in alternative mobile management net element service range.

Wherein, the message that described target side mobile management network element sends to alternative mobile management network element specifically includes but not limited to following several method:

1) message that described target side mobile management network element sends to alternative mobile management network element also comprises forwarding indicates, for example forwarding contexts instruction (Forward UE Context Indicator), indicating this message is contextual forwarding re-positioning request or the forwarding reorientation requirement message for forwarding subscriber equipment, make the alternative mobile management network element that receives this forwarding re-positioning request or forward reorientation requirement message know context and the alternative wireless access network net element information of described subscriber equipment, but not switching/reorientation associative operation of performance objective side shifting managed network element (for example session connection of establishment and gateway), or,

2) message that described target side mobile management network element sends to alternative mobile management network element also comprises target identification information, for example target identification (Target ID), alternative mobile management network element can for example, be differentiated by resolving the wireless access network network element ID (eNodeB ID) comprising in Target ID cell, if Target Wireless access network elements does not belong to current alternative mobile management network element, know that current mobile management network element is alternative mobile management network element instead of target side mobile management network element, make the alternative mobile management network element that receives this forwarding re-positioning request or forward reorientation requirement message know context and the alternative wireless access network net element information of described subscriber equipment, but not switching/reorientation associative operation of performance objective side shifting managed network element (for example session connection of establishment and gateway).

Wherein, described alternative mobile management network element can arrange the timer Backup_UE_Context_Timer that described contextual information is corresponding, in the time knowing the contextual information of subscriber equipment, start described timer, if UE rebuilds successfully at this alternative mobile management network element, remove described timer, if after described timer expiry, the contextual information of the described subscriber equipment of preserving can be removed, avoid the waste of storage resources on alternative mobile management network element.The time-out time of this timer can be by obtaining alternative mobile management network element self configuration or the message that can send to alternative mobile management network element from described target side mobile management network element.

In addition, if target side mobile management network element is known the alternative wireless access network element of existence and (is not present in source mobile management net element service range), need to be sent by target side mobile management network element the message of carrying alternative wireless access network net element information to source mobile management network element in alternative mobile management network element service range and target side managed network element service range.Wherein the present embodiment not limited target side shifting managed network element send message and target side mobile management network element and send to alternative mobile management network element the execution sequence (not the execution sequence of conditioning step 505, step 506 and step 507) of message to source mobile management network element.

Concrete scheme 5A:

Execution step 506 and step 507, wherein, in step 506, sent to source mobile management network element the message of carrying alternative wireless access network net element information by target side mobile management network element, the present embodiment is the execution sequence of conditioning step 506, step 505 and step 507 not.

Concrete scheme 5B:

Execution step 507, is sent the forwarding relocation response message (now not performing step 506) of carrying alternative wireless access network net element information to source mobile management network element by target side mobile management network element.

Step 506: target side mobile management network element sends message to source mobile management network element.

Wherein, the description of the message that the description of the message that described target side mobile management network element sends to source mobile management network element can send to alternative mobile management network element referring to the mobile management network element of target side described in step 505 repeats no more herein.

Wherein, the message that described target side mobile management network element sends to source mobile management network element comprises alternative wireless access network net element information.The alternative wireless access network net element information that the message that described target side mobile management network element sends to source mobile management network element comprises can be: all alternative wireless access network net element information that target side mobile management network element is known in step 504; Or, the alternative wireless access network net element information in source mobile management net element service range.Wherein, the processing of timer is set referring to the description of timer in step 505 in described source mobile management network element, repeats no more herein.

Step 507: target side mobile management network element sends and forwards relocation response (Forward Relocation Response) message to source mobile management network element.

For scheme 5B, if target side mobile management network element knows that the alternative wireless access network element of existence (is to have one or more alternative access network elements in described alternative access network elements information not in alternative mobile management network element service range and target side managed network element service range, above-mentioned alternative access network elements serve mobile management net element be source mobile management net element) time, described forwarding relocation response message comprises the information of described alternative wireless access network element, for example the mark of described alternative wireless access network element.

Wherein, the alternative wireless access network net element information that the message that described target side mobile management network element sends to source mobile management network element comprises can be: all alternative wireless access network net element information that target side mobile management network element is known in step 504; Or, the alternative wireless access network net element information in source mobile management net element service range.

Wherein, if target side mobile management network element is known the alternative wireless access network element of existence and (is not present in source mobile management net element service range) in alternative mobile management network element service range and target side managed network element service range: for scheme 5A, need to perform step 506 and step 507, it in step 507, is now original forwarding relocation response message, do not comprise alternative wireless access network net element information, the execution sequence of conditioning step 506 and step 507 not in the present embodiment; For scheme 5B, need to perform step 507 (now not performing step 506), in step 507, be now the forwarding relocation response message of expansion, comprise alternative wireless access network net element information.

Step 508: mobile management network element sends message to alternative wireless access network element.

Wherein, the message that described mobile management network element (source mobile management network element or target mobility management network element or alternative mobile management network element) sends to alternative access network elements can be handover request (Handover Request) message, or, can be a new S1-AP message, for example switch and prepare (Handover Preparation) message (the present embodiment is not to limiting this message name), more than concrete employing which a piece of news the present embodiment does not limit this.

Step 509: alternative wireless access network element sends response message to described mobile management network element.

Wherein, the response message that described alternative wireless access network element sends to described mobile management network element, it can be the handoff request acknowledgment message (Handover Request Acknowledge) of expansion, or, can be that a new switching prepares to reply (Handover PreparationAck) message, or, can be original handoff request acknowledgment message.Specifically can include but not limited to following mode:

The described message that described alternative wireless access network element sends to described mobile management network element also comprises forwarding replys instruction, for example forward customer equipment context and reply instruction (Forward UE Context Ack Indicator), indicating this response message is the response message of described step 508, it not the handoff request acknowledgment message of the Target Wireless access network elements transmission at place, Target cell, make the described mobile management network element that receives this handoff request acknowledgment message confirm that described alternative wireless net member obtains the context of described subscriber equipment, but do not carry out switching/reorientation associative operation (for example trigger and create indirect forwarding tunnel (Create Indirect Data Forwarding Tunnel) or send switching command (Handover Command) message to source wireless access network element) of mobile management network element.

Wherein, this step 509 is optional, can select carry out or do not carry out, and the present embodiment does not limit this.

Step 510: alternative mobile management network element sends response message to target side mobile management network element.

Wherein, the response message that alternative mobile management network element sends to described target side mobile management network element can be that a new message (for example forwards reorientation demand response (Forward Relocation Ack) message, or, can be forwarding relocation response (the Forward Relocation Response) message of expansion.Specifically can include but not limited to following mode:

The described response message that described alternative mobile management network element sends to described target side mobile management net element also comprises forwarding replys instruction, for example forward customer equipment context and reply instruction (Forward UE ContextAck Indicator), the response message that instruction response message is described step 505, the target side mobile management net element that makes to receive this response message confirms that alternative mobile management net element learns described alternative wireless access network net element information or confirms that contextual information that described wireless access network element successfully sends subscriber equipment is to described wireless access network element, now not switching/reorientation associative operation of performance objective side shifting managed network element (for example session connection of establishment and gateway) of target side mobile management net element.

Wherein, this step 510 is optional, can select carry out or do not carry out, and the present embodiment does not limit this.

Wherein, this step 510 can be in the rear execution of step 505, or, can after step 509 (being that alternative wireless access network element sends response message to alternative mobile management net element), carry out, the present embodiment does not limit this.

Step 511: source mobile management network element sends response message to target side mobile management network element.

Wherein, the description of the response message that the description of the response message that source mobile management network element sends to described target side mobile management network element can send to target side mobile management network element referring to alternative mobile management network element described in step 510 repeats no more herein.

Wherein, this step 511 is optional, can select carry out or do not carry out, and the present embodiment does not limit this.

Wherein, this step 511 can be in step 506 or the rear execution of step 507, or, can after step 509 (being that alternative wireless access network element sends response message to source mobile management net element), carry out, the present embodiment does not limit this.

Step 512: source mobile management network element sends switching command (Hnadover Command) message to source wireless access network element.

Step 513: carry out the residue flow process that S1 switches, comprising upgrading upstream and downstream user face transmission path, tracing section updating flow process etc. repeat no more herein.

Step 514-step 519: referring to step 414-step 419 in embodiment tetra-, herein repeat no more.

In the embodiment of the present invention, target side wireless access network element is known alternative wireless access network net element information in subscriber equipment switching flow, and make mobile management network element obtain described alternative wireless access network net element information, send the contextual information of described subscriber equipment to described alternative wireless access network element by described mobile management network element, make unavailable at X2 interface or do not use in X2 interface situation, ensure that alternative wireless access network element knows the context of described subscriber equipment, thereby described subscriber equipment is completed while finding that wireless link is unavailable in handoff failure or switching, described subscriber equipment can be carried out reconstruction flow process at the described contextual alternative wireless access network element of knowing described subscriber equipment, keep session not interrupt, reduce cutting off rate, improve user's experience.

Embodiment six: as shown in Figure 6, the present embodiment provides another to obtain contextual method, specifically comprises:

S1 switching flow:

Step 600: switching flow is initiated in the decision-making of source wireless access network element.

Step 601: source wireless access network element sends switching demand (Handover Required) message to source mobile management network element.

Wherein, receive after described handoff requirement message, described source mobile management network element can self obtain described alternative wireless access network net element information by configuration information, specifically can include but not limited to that source mobile management network element will be according to source wireless access network net element information, target side wireless access network net element information, source mobility management network element information and/or target side mobility management network element information are by self configuration information or by the alternative wireless access network net element information of Getting Network Topology Information, for example source mobile management network element self has configured neighbours' wireless access network metamessage, source mobile management network element obtains respective neighbor wireless access network metamessage as alternative wireless access network net element information according to the target side wireless access network net element information matching configuration information of source wireless access network net element information and/or institute's decision-making, or, source mobile management network element self adds up according to the movement locus of subscriber equipment the alternative wireless access network net element information that (for example, according to the target side wireless access network net element information of source wireless access network net element information and/or institute's decision-making) draws.

Wherein, described alternative wireless access network element can include but not limited to all or part neighbours' wireless access network element of source wireless access network element, and all or part neighbours' wireless access network element of target side wireless access network element, and all or part wireless access network element in source mobile management network element service range, and all or part wireless access network element in target side mobile management network element service range, and other at least one of other wireless access network element in source and target side mobile management network element service range (in alternative mobile management network element service range) etc. not.

Wherein, if the Target cell of switching does not belong to source mobile management network element service range (being that MME changes), perform step 602; If MME does not change and exist the alternative wireless access network element of knowing (to be present in alternative mobile management net element service range), perform step 603 (not performing step 602) not in source mobile management network element service range; If MME does not change and alternative wireless access network element all in source mobile management network element service range, perform step 605 (not performing step 602-step 604).

Step 602-613: describe referring to step 402-413 in embodiment tetra-, the present embodiment repeats no more herein.

Step 614-step 619: referring to step 414-step 419 in embodiment tetra-, herein repeat no more.

In the embodiment of the present invention, source mobile management net element is known alternative wireless access network net element information in subscriber equipment switching flow, and make at least one in target side mobile management network element and alternative mobile management network element obtain described alternative wireless access network net element information, send the contextual information of described subscriber equipment to described alternative wireless access network element by above mobile management network element, make unavailable at X2 interface or do not use in X2 interface situation, ensure that alternative wireless access network element knows the context of described subscriber equipment, thereby described subscriber equipment is completed while finding that wireless link is unavailable in handoff failure or switching, described subscriber equipment can be carried out reconstruction flow process at the described contextual alternative wireless access network element of knowing described subscriber equipment, keep session not interrupt, reduce cutting off rate, improve user's experience.

Embodiment seven: as shown in Figure 7, the present embodiment provides another to obtain contextual method, specifically comprises:

S1 switching flow:

Step 700: switching flow is initiated in the decision-making of source wireless access network element.

Source wireless access network element receives the measurement report of user equipment to report, and switching flow is initiated in decision-making, and the Target cell of decision-making switching.

Step 701: source wireless access network element sends switching demand (Handover Required) message to source mobile management network element.

Step 702: source mobile management network element sends and forwards re-positioning request (Forwarding Relocation Request) message to target side mobile management network element.

Wherein, receive after described forwarding RELOCATION REQUEST message, described target side mobile management network element can self obtain described alternative wireless access network net element information by configuration information, specifically can include but not limited to that target side mobile management network element will be according to source wireless access network net element information, target side wireless access network net element information, source mobility management network element information, at least one in target side mobility management network element information is by self configuration information or by the alternative wireless access network net element information of Getting Network Topology Information, for example target side mobile management network element self has configured neighbours' wireless access network net element information, target side mobile management network element obtains respective neighbor wireless access network metamessage as alternative wireless access network net element information according to the target side wireless access network net element information matching configuration information of source wireless access network net element information and/or institute's decision-making, or, target side mobile management network element self adds up according to the movement locus of subscriber equipment the alternative wireless access network net element information that (for example, according to the target side wireless access network net element information of source wireless access network net element information and/or institute's decision-making) draws.

Step 703: target side mobile management network element sends handover request (Handover Request) message to target side wireless access network element.

Step 704: target side wireless access network element sends handover request to target side mobile management network element and replys (Handover Request Acknowledge) message.

Step 705: target side mobile management network element sends message to alternative mobile management network element.

Wherein, the message that described target side mobile management network element sends to alternative mobile management network element comprises alternative wireless access network net element information and described customer equipment context information.The alternative wireless access network net element information that the message that described target side mobile management network element sends to alternative mobile management network element comprises can be: all alternative wireless access network net element information that target side mobile management network element is known in step 702; Or, the alternative wireless access network net element information in alternative mobile management net element service range.

Wherein, the message that described target side mobile management network element sends to alternative mobile management network element specifically includes but not limited to following several method::

Wherein, the execution sequence of conditioning step 705 not in the present embodiment, it can carry out (after being not limited in step 703 or before step 706) in rear any time of step 702.

In addition, if target side mobile management network element is known the alternative wireless access network element of existence and (is not present in source mobile management net element service range), need to be sent by target side mobile management network element the message of carrying alternative wireless access network net element information to source mobile management network element in alternative mobile management network element service range and target side managed network element service range.Wherein the present embodiment not limited target side shifting managed network element send message and target side mobile management network element and send to alternative mobile management network element the execution sequence (not the execution sequence of conditioning step 705, step 706 and step 707) of message to source mobile management network element.

Concrete scheme 7A:

Execution step 706 and step 707, is sent the message of carrying alternative wireless access network net element information to source mobile management network element by target side mobile management network element in step 706, the present embodiment is the execution sequence of conditioning step 706 and step 705 not.

Concrete scheme 7B:

Execution step 707, is sent the forwarding relocation response message (now not performing step 706) of carrying alternative wireless access network net element information to source mobile management network element by target side mobile management network element.

Step 706: target side mobile management network element sends message to source mobile management network element.

Wherein, the description of the message that the description of the message that described target side mobile management network element sends to source mobile management network element can send to alternative mobile management network element referring to the mobile management network element of target side described in step 705 repeats no more herein.

Wherein, the message that described target side mobile management network element sends to source mobile management network element comprises alternative wireless access network net element information.The alternative wireless access network net element information that the message that described target side mobile management network element sends to source mobile management network element comprises can be: all alternative wireless access network net element information that target side mobile management network element is known in step 702; Or, the alternative wireless access network net element information in source mobile management net element service range.Wherein, the processing of timer is set referring to the description of timer in step 705 in described source mobile management network element, repeats no more herein.

Step 707: target side mobile management network element sends and forwards relocation response (Forward Relocation Response) message to source mobile management network element.

For scheme 7B, if target side mobile management network element knows that the alternative wireless access network element of existence (is to have one or more alternative access network elements in described alternative access network elements information not in alternative mobile management network element service range and target side managed network element service range, above-mentioned alternative access network elements serve mobile management net element be source mobile management net element) time, described forwarding relocation response message comprises the information of described alternative wireless access network element, for example the mark of described alternative wireless access network element.

Wherein, the alternative wireless access network net element information that the message that described target side mobile management network element sends to source mobile management network element comprises can be: all alternative wireless access network net element information that target side mobile management network element is known in step 702; Or, the alternative wireless access network net element information in source mobile management net element service range.

Wherein, if target side mobile management network element is known the alternative wireless access network element of existence and (is not present in source mobile management net element service range) in alternative mobile management network element service range and target side managed network element service range: for scheme 7A, need to perform step 706 and step 707, it in step 707, is now original forwarding relocation response message, do not comprise alternative wireless access network net element information, the execution sequence of conditioning step 706 and step 707 not in the present embodiment; For scheme 7B, need to perform step 707 (not performing step 706), in step 707, be now the forwarding relocation response message of expansion, comprise alternative wireless access network net element information.

Step 708-713: describe with step 508-513 in embodiment five, the present embodiment repeats no more herein.

Step 714-step 719: referring to step 414-step 419 in embodiment tetra-, herein repeat no more.

In the embodiment of the present invention, target side mobile management net element is known alternative wireless access network net element information in subscriber equipment switching flow, and make at least one in source mobile management network element and alternative mobile management network element obtain described alternative wireless access network net element information, in subscriber equipment switching flow, know alternative wireless access network net element information by above mobile management network element, send the contextual information of described subscriber equipment to described alternative wireless access network element by described mobile management network element, make unavailable at X2 interface or do not use in X2 interface situation, ensure that alternative wireless access network element knows the context of described subscriber equipment, thereby described subscriber equipment is completed while finding that wireless link is unavailable in handoff failure or switching, described subscriber equipment can be carried out reconstruction flow process at the described contextual alternative wireless access network element of knowing described subscriber equipment, keep session not interrupt, reduce cutting off rate, improve user's experience.

The embodiment of the present invention eight provides a kind of mobile management network element, taking shown in Fig. 8 as example, this mobile management network element comprises: acquiring unit 80 and message sending unit 81;

Described acquiring unit 80, for obtaining alternative wireless access network net element information;

When described mobile management network element as subscriber equipment switch source mobile management network element time, this acquiring unit 80 obtains described alternative wireless access network net element information and comprises: receive the handoff requirement message that source wireless access network network element sends, described handoff requirement message is carried alternative wireless access network net element information; Or, configure and know alternative wireless access network net element information according to self; Or, the message that receiving target side shifting managed network element sends, the message that described target side mobile management network element sends is carried alternative wireless access network net element information;

When described mobile management network element as subscriber equipment switch target side mobile management network element time, this acquiring unit 80 obtains described alternative wireless access network net element information and comprises: the message that reception sources side shifting managed network element sends, and the message that described source mobile management net element sends is carried alternative wireless access network net element information; Or, configure and know alternative wireless access network net element information according to self; Or, the handoff request acknowledgment message that receiving target side wireless access network element sends, described handover request is replied and is carried alternative wireless access network net element information;

When described mobile management network element as subscriber equipment switch alternative mobile management network element time, this acquiring unit 80 obtains described alternative wireless access network net element information and comprises: the message that reception sources side shifting managed network element or target side mobile management net element send, and the message that described source mobile management net element or target side mobile management net element send is carried the context of alternative wireless access network net element information and described subscriber equipment;

Described message sending unit 81, sends message, the context that described message comprises subscriber equipment for the alternative wireless access network element comprising to described alternative wireless access network net element information.

Wherein, described alternative mobile management network element refers to other mobile management network element except source mobile management network element and target side mobile management network element.

The embodiment of the present invention nine provides a kind of wireless access network element, and as shown in Figure 9, described wireless access network element comprises: the first receiving element 90, recognition unit 91, the second receiving element 92 and resource allocation unit 93;

Described the first receiving element 90, for receipt message, carries the context of subscriber equipment in described message;

Whether described recognition unit 91, for identifying message that described the first receiving element 90 receives for forwarding the context of described subscriber equipment; The message that described the first receiving element 90 receives comprises switching prepares message or handover request message, and whether this recognition unit 91 is identified the message that described the first receiving element 90 receives and comprised for the context that forwards described subscriber equipment:

Described switching prepares to carry the instruction of forwarding customer equipment context in message or handover request message, and the described forwarding customer equipment context that described recognition unit prepares to carry in message or handover request message according to described switching indicates the described switching preparation message of identification or handover request message for forwarding the context of described subscriber equipment.Or

Message is prepared in described switching or handover request message is carried target identification, the target identification information that described recognition unit prepares to carry in message or handover request message according to described switching is identified described switching and is prepared message or handover request message for forwarding the context of described subscriber equipment, and this wireless access network element is not object access network elements.

The second receiving element 92, the radio resource control information sending for receiving described subscriber equipment;

Resource allocation unit 93, is that context and the second receiving element 92 that forwards described subscriber equipment receives after the radio resource control information of described subscriber equipment for identify described message at described recognition unit 91, is described user equipment allocation interface-free resources.This resource allocation unit 93 is identified in the context situation that described message is the described subscriber equipment of forwarding at described recognition unit 91, be not described user equipment allocation interface-free resources, but be described user equipment allocation interface-free resources again in the radio resource control information situation that receives described subscriber equipment transmission.

Embodiment of the present invention wireless access network element is receiving the message of carrying customer equipment context, and know that described message is to forward after the context of described subscriber equipment, do not distribute interface-free resources, when switch failure or the switching of described subscriber equipment completes while finding that wireless link is unavailable, receive after the radio resource control information of described subscriber equipment, for described user equipment allocation interface-free resources, ensure that described subscriber equipment switches the unbroken interface-free resources of simultaneously having saved of session service.

In sum, the present embodiment has been realized mobile management network element the context of subscriber equipment has been sent to one or more alternative wireless access network elements, make unavailable at X2 interface or do not use in X2 interface situation, ensure that alternative wireless access network element knows the context of described subscriber equipment, thereby ensured that the session service that has switched rear subscriber equipment does not interrupt.

One of ordinary skill in the art will appreciate that, all or part of step realizing in above-described embodiment method is can carry out the hardware that instruction is relevant by program to complete, and described program can be stored in a kind of computer-readable recording medium.

The above; only for preferably embodiment of the present invention, but protection scope of the present invention is not limited to this, is anyly familiar with in technical scope that those skilled in the art disclose in the present invention; the variation that can expect easily or replacement, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.

Claims

1. obtain a contextual processing method, it is characterized in that, comprising:

The message that target side mobile management network element reception sources side shifting managed network element sends, the message that described source mobile management net element sends is carried alternative wireless access network net element information;

Described target side mobile management network element sends to switch to the alternative wireless access network element comprising in described alternative wireless access network net element information prepares message or handover request message, described switching preparation message or handoff request message are containing the context of subscriber equipment, and message is prepared in described switching or handover request message is also carried the instruction of forwarding customer equipment context;

The described forwarding customer equipment context instruction that described alternative wireless access network element prepares to carry in message or handover request message according to described switching knows that described switching preparation message or handover request message are for forwarding the context of described subscriber equipment,

Described alternative wireless access network element obtains the context of described subscriber equipment.

2. the method for claim 1, it is characterized in that, the message that described target side mobile management network element reception sources side shifting managed network element sends, the message that described target side mobile management network element sends is carried alternative wireless access network net element information and is specifically comprised:

3. the method for claim 1, is characterized in that, described alternative wireless access network element specifically comprises after obtaining the context of described subscriber equipment:

Described alternative wireless access network element receives the radio resource control information that described subscriber equipment sends;

Described alternative wireless access network element is described user equipment allocation interface-free resources.

4. a mobile management network element, is characterized in that, comprising:

Acquiring unit, for obtaining alternative wireless access network net element information, comprising: the message that reception sources side shifting managed network element sends, and the message that described source mobile management net element sends is carried alternative wireless access network net element information;

Message sending unit, send to switch for the alternative wireless access network element comprising to described alternative wireless access network net element information and prepare message or handover request message, described switching preparation message or handoff request message are containing the context of subscriber equipment, and message is prepared in described switching or handover request message is also carried the instruction of forwarding customer equipment context.

5. a wireless access network element, is characterized in that, comprising:

The first receiving element, prepares message or handover request message for receiving to switch, and carries the context of subscriber equipment and forward customer equipment context instruction in described message;

Recognition unit, prepares message or handover request message for forwarding the context of described subscriber equipment for prepare the described switching of described forwarding customer equipment context instruction identification that message or handover request message carries according to described switching;

6. wireless access network element as claimed in claim 5, it is characterized in that, the message that described the first receiving element receives comprises switching prepares message or handover request message, described switching prepares to carry the instruction of forwarding customer equipment context in message or handover request message, and the described forwarding customer equipment context that described recognition unit prepares to carry in message or handover request message according to described switching indicates the described switching preparation message of identification or handover request message for forwarding the context of described subscriber equipment.