CN101656992A

CN101656992A - Methods and system for resource release, base station, service gateway and mobile management network element

Info

Publication number: CN101656992A
Application number: CN200810173043A
Authority: CN
Inventors: 支春霞; 张万强
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2008-08-19
Filing date: 2008-10-29
Publication date: 2010-02-24

Abstract

The embodiment of the invention relates to methods and a system for resource release, a base station, a service gateway and a mobile management network element. One method for resource release comprises: when the load of a user plane is switched into a target network, judging whether data forwarding is completed; when the data forwarding is completed, releasing a resource corresponding to user equipment; and sending identifier information to a target base station or a source service gateway, wherein the identifier information is used for indicating the completion of the data forwarding. The other method for resource release comprises: when the load of the user plane is switched into a target network, starting a timer which is used for monitoring the resource release time of a target network node of the user equipment; and when the timer is in a timeout state, sending first instruction information to the target network node, wherein the first instruction information is used for instructing the target network node to release the resource corresponding to the user equipment. The embodiment of the invention is favorable for improving the flexibility of resource release and saving network resources.

Description

Method for releasing resource and system, base station, gateway and mobile management network element

Technical field

The embodiment of the invention relates to wireless communication technology field, particularly relates to a kind of method for releasing resource and system, base station, gateway and mobile management network element.

Background technology

Long-term evolving network/System Architecture Evolution network (Long Term Evolved/SystemArchitecture Evolved, hereinafter to be referred as LTE/SAE) be a kind of mobile communications network of carrying out in present third generation partner program (Third Generation Partnership Project the is called for short 3GPP) tissue.The LTE/SAE main purpose provides a kind of low-cost network that can reduce time delay, raising user data rate, increase power system capacity and covering, this network can use packet-switched domain (Packet-Switched domain, be called for short PS) business, carrying IP packet etc.

In the LTE/SAE network, be in subscriber equipment (the User Equipment of connection status, hereinafter to be referred as UE) from current base station (Evolved Node B, hereinafter to be referred as eNB), the control area that is source base station (SourceeNB) enters into another base station, be the control area of target BS (Target eNB), need communicate the control signaling of interface and the carrying of transmission data and switch.The carrying of the control signaling of communication interface and transmission data is switched and to be comprised that handoff preparation phase, handover execution stage and switching finish the stage.Handoff preparation phase mainly is on target BS, finishes the resource reservation that is used for transmitting with the UE corresponding data and handles; Handover execution stage is finished the handoff procedure of eating dishes without rice or wine, and comprises that UE is that UE distributes access channel etc. to synchronous, the Target cell of Target cell; The switching stage of finishing is mainly carried out the handoff procedure of core net carrying.Carry out in the carrying handoff procedure of core net in the switching stage of finishing, set up when finishing, need to discharge and the corresponding resource of subscriber equipment, to save Internet resources when the corresponding user plane bearer of target BS and UE.Prior art discharges indication by target network node to the source base station down distributing resource after finishing with the corresponding user plane bearer foundation of UE; Source base station according to resource discharge on the indication source of release base station, with the corresponding resource of subscriber equipment.

The inventor finds in realizing process of the present invention, prior art is when finishing with the corresponding user plane bearer foundation of UE, dispose procedure with the corresponding resource of UE in the source base station is to discharge indication by the resource that destination node issues to trigger, as seen, prior art exists at least when user plane bearer foundation is finished, with the inflexible technological deficiency of the corresponding resource delivery mode of UE.

Summary of the invention

The technical problem that the embodiment of the invention will solve provides a kind of method for releasing resource and system, base station, gateway and mobile management network element, be used for when having switched to objective network, improve the flexibility of resource delivery mode with the corresponding user plane bearer of UE.

The embodiment of the invention provides a kind of method for releasing resource, comprising:

When user plane bearer switched to objective network, whether judgment data was transmitted and is finished;

When data forwarding is finished, discharge and the corresponding resource of subscriber equipment;

Send identification information to target BS or source gateway, described identification information is used to represent that data forwarding finishes.

In the method for releasing resource that the embodiment of the invention provides, when user plane bearer switches to objective network, whether finish by the judgment data forwarding, when data forwarding is finished, discharge and the corresponding resource of UE, and, make target BS or source gateway to discharge respective resources according to this identification information to target BS or the completed identification information of source gateway data forwarding, thereby promptly guaranteed the integrality of data forwarding, helped improving flexibility of resource release again.

The embodiment of the invention provides a kind of base station, comprising:

Judge module is used for when user plane bearer switches to objective network, and whether judgment data is transmitted and finished;

The first resource release module is used for when data forwarding is finished, and discharges and the corresponding resource of subscriber equipment;

The identification information sending module is used for sending identification information to target BS or source gateway, and described identification information represents that data forwarding finishes.

In the base station that the embodiment of the invention provides, by judge module when user plane bearer switches to objective network, whether judgment data is transmitted and is finished, when data forwarding is finished, discharge and the corresponding resource of UE by the first resource release module, and pass through the identification information sending module to target BS or the completed identification information of source gateway data forwarding, make target BS or source gateway to discharge respective resources according to this identification information, thereby promptly guaranteed the integrality of data forwarding, helped improving flexibility of resource release again.

The embodiment of the invention provides another base station, comprising:

The 3rd receiver module is used to receive the identification information that the source base station of subscriber equipment sends, and described identification information is used to represent that described source base station data forwarding finishes;

The second resource release module is used for according to described identification information, discharges and the corresponding resource of described subscriber equipment.

In another base station that the embodiment of the invention provides, when receiving the completed identification information of source base station data forwarding of expression subscriber equipment, discharge and the corresponding resource of subscriber equipment, thereby promptly guaranteed the integrality of data forwarding, help improving flexibility of resource release again.

The embodiment of the invention provides a kind of gateway, comprising:

The 4th receiver module is used to receive the identification information that the source base station of subscriber equipment sends, and described identification information is used to represent that described source base station data forwarding finishes;

The information resources release module is used for according to described identification information, discharges and the corresponding resource of described subscriber equipment.

In the gateway that the embodiment of the invention provides, when receiving the completed identification information of source base station data forwarding of expression subscriber equipment, discharge and the corresponding resource of subscriber equipment, thereby promptly guaranteed the integrality of data forwarding, help improving flexibility of resource release again.

The embodiment of the invention provides a kind of resource delivery system, comprising:

Source base station is used for when user plane bearer switches to objective network, and whether judgment data is transmitted and finished; When data forwarding is finished, discharge and the corresponding resource of subscriber equipment; Send identification information to target BS or source gateway, described identification information is used to represent that described source base station data forwarding finishes;

Target BS or source gateway are used for discharging and the corresponding resource of described subscriber equipment according to the described identification information that receives.

In the resource delivery system that the embodiment of the invention provides, when user plane bearer switches to objective network, whether source base station is transmitted by judgment data and is finished, when data forwarding is finished, discharge and the corresponding resource of UE, and, make target BS or source gateway to discharge respective resources according to this identification information to target BS or the completed identification information of source gateway data forwarding, thereby promptly guaranteed the integrality of data forwarding, helped improving flexibility of resource release again.

Another method for releasing resource that the embodiment of the invention provides comprises:

When user plane bearer switches to objective network, start timer; The resource that described timer is used for the target network node of supervisory user equipment discharges constantly;

When described timer expiry, send first indication information to target network node; Described first indication information is used to indicate described target network node to discharge and the corresponding resource of described subscriber equipment.

In another method for releasing resource that the embodiment of the invention provides, when user plane bearer switches to objective network, start timer, the resource of the target network node by timer supervisory user equipment discharges constantly; When timer expiry, the release respective resources of indicating target network node, thus save target network resource, improved flexibility of resource release.

A kind of mobile management network element that the embodiment of the invention provides comprises:

Time block is used for when user plane bearer switches to objective network, starts timer; The resource that described timer is used for the target network node of supervisory user equipment discharges constantly;

First resource discharges indicating module, is used for sending first indication information to target network node when described timer expiry; Described first indication information is used to indicate described target network node to discharge and the corresponding resource of described subscriber equipment.

In the mobile management network element that the embodiment of the invention provides, when user plane bearer switches to objective network, start timer by time block, the resource that is used for the target network node of supervisory user equipment discharges constantly; When timer expiry, discharge the release respective resources of indicating module indicating target network node by first resource, thereby save target network resource, improved flexibility of resource release.

The embodiment of the invention provides another mobile management network element, comprising:

The 5th receiver module is used to receive data forwarding and finishes indication;

Second resource discharges indicating module, be used for finishing when indication when described the 5th receiver module receives described data forwarding, destination service gateway or target BS to subscriber equipment send second indication information, and described second indication information is used to indicate described destination service gateway or target BS to discharge and the corresponding resource of described subscriber equipment.

In another mobile management network element that the embodiment of the invention provides, finish when indication when receiving with the corresponding data forwarding of subscriber equipment, discharge indicating module indicating target gateway or target BS release respective resources by second resource, thereby the saving target network resource has improved flexibility of resource release.

The embodiment of the invention provides another base station, comprising:

The 6th receiver module is used to receive second indication information that the target mobility management network element of subscriber equipment sends, and described second indication information is used to indicate described base station to discharge and the corresponding resource of described subscriber equipment;

The 4th resource release module is used for discharging and the corresponding resource of described subscriber equipment when described the 6th receiver module receives described second indication information.

In the another base station that the embodiment of the invention provides, when second indication information that the target mobility management network element that receives subscriber equipment sends, discharge and the corresponding resource of subscriber equipment by the resource release module, thereby save target network resource, improved flexibility of resource release.

The embodiment of the invention provides another gateway, comprising:

The 7th receiver module is used to receive second indication information that the target mobility management network element of subscriber equipment sends, and described second indication information is used to indicate described gateway to discharge and the corresponding resource of described subscriber equipment;

The 5th resource release module is used for discharging and the corresponding resource of described subscriber equipment when described the 7th receiver module receives described second indication information.

In the another gateway that the embodiment of the invention provides, when second indication information that the target mobility management network element that receives subscriber equipment sends, discharge and the corresponding resource of subscriber equipment by the resource release module, thereby save target network resource, improved flexibility of resource release.

The embodiment of the invention provides another resource delivery system, comprising:

The source mobile management network element is used for when user plane bearer switches to objective network, starts timer; The resource that described timer is used for the target network node of supervisory user equipment discharges constantly; When described timer expiry, send first indication information to target network node; Described first indication information is used to indicate described target network node to discharge and the corresponding resource of described subscriber equipment

Target network node is used for discharging and the corresponding resource of described subscriber equipment when receiving described first indication information.

In another resource delivery system that the embodiment of the invention provides, by the source mobile management network element, when user plane bearer switches to objective network, start timer, the resource of the target network node by timer supervisory user equipment discharges constantly; When timer expiry, target network node discharges respective resources according to the indication that the source mobile management network element issues, thereby saves target network resource, has improved flexibility of resource release.

Description of drawings

Fig. 1 is the application scenarios LTE/SAE system configuration schematic diagram of method for releasing resource embodiment of the present invention;

Fig. 2 is a kind of method for releasing resource first embodiment flow chart of the present invention;

Fig. 3 is a kind of method for releasing resource second embodiment signaling diagram of the present invention;

Fig. 4 is a kind of method for releasing resource the 3rd embodiment signaling diagram of the present invention;

Fig. 5 is a kind of method for releasing resource the 4th embodiment signaling diagram of the present invention;

Fig. 6 is a kind of base station of the present invention example structure schematic diagram;

Fig. 7 is another base station example structure schematic diagram of the present invention;

Fig. 8 is a gateway example structure schematic diagram of the present invention;

Fig. 9 is a kind of resource delivery system of the present invention example structure schematic diagram;

Figure 10 is another method for releasing resource first embodiment flow chart of the present invention;

Figure 11 is another method for releasing resource second embodiment signaling diagram of the present invention;

Figure 12 is another method for releasing resource the 3rd embodiment signaling diagram of the present invention;

Figure 13 is a kind of mobile management network element example structure of the present invention schematic diagram;

Figure 14 is another mobile management network element example structure schematic diagram of the present invention;

Figure 15 is the another base station of a present invention example structure schematic diagram;

Figure 16 is the another gateway example structure of a present invention schematic diagram;

Figure 17 is another resource delivery system example structure schematic diagram of the present invention.

Embodiment

Below by drawings and Examples, technical scheme of the present invention is described in further detail.

Fig. 1 is the application scenarios LTE/SAE system configuration schematic diagram of method for releasing resource embodiment of the present invention.As shown in Figure 1, in the packet-based core networks LTE/SAE of evolution, mainly comprise: mobile management network element (Mobility Management Entity, hereinafter to be referred as MME), SAE gateway (SAE Gateway, be called for short SAE GW), the universal terrestrial access network of evolution (Evolved UniversalTerrestrial Radio Access Network, hereinafter to be referred as E-UTRAN) in evolution base station (Evolved Node B, hereinafter to be referred as eNB), service universal packet wireless business affair (General PacketRadio Service, hereinafter to be referred as GPRS) support node (Serving GRPS Support Node, hereinafter to be referred as SGSN), and policy charging rule function network element (Policy and Charging RulesFunction is hereinafter to be referred as PCRF).

The MME function mainly is to preserve subscriber equipment (User Equipment, hereinafter to be referred as UE) MM Context, and to Non-Access Stratum (Non Access Stratum, abbreviation NAS) signaling is handled, be responsible for the safety of NAS signaling etc., wherein MM Context can comprise user's sign, mobility management states, positional information etc.

The SAE gateway comprises gateway (Serving Gateway is hereinafter to be referred as S-GW) and grouped data network gateway (Packet Data Network Gateway is hereinafter to be referred as P-GW); S-GW and P-GW are two logic entities, may reside on the same or different physical entities.The last main user's face context of preserving UE of S-GW, as: the IP address of UE and routing iinformation, execution Lawful Interception, grouped data routing function etc.; S-GW communicates by letter with MME by the S11 interface, and it is mutual to carry out the mobility management information of UE and session control information etc.P-GW is responsible for user's face anchor point function that UE is linked into Packet Data Network, communicate by SGi reference point and external packet data net, function with grouping route and forwarding, and responsible policy, billing enhancement function, based on each user's packet filtering function etc.; P-GW communicates by letter with S-GW by the S5 interface, transmission bearer foundation/modification/control informations such as deletion, and the grouped data route etc.

E-UTRAN is made up of a plurality of eNB, can pass through X2 interface mutual communication (Fig. 1 is not shown) between the eNB.The eNB major function is the wireless connections of being responsible between foundation, maintenance or release and the UE, preserves the contextual information that is in connection status UE, and Access Layer (Access Stratum is called for short AS) signaling is handled, and is responsible for the safety of AS signaling etc.

The SGSN major function is the IP grouping of transmitting I/O for the subscriber equipment of this SGSN coverage, comprising: the route and the forwarding capability of the packet data package in this SGSN area, for all the PS users in this SGSN area provide service; Encrypt and authentication functions; Conversation management functional; The mobile management function; SGSN is responsible for mobility chain of command anchor point and the user face anchor point function of UE between 2G/3G and SAE network.SGSN communicates by letter with MME by S 3 interfaces, communicates by letter with S-GW by the S4 interface.

PCRF mainly by the S7 interface to P-GW (as policy, billing enhancement function (Policy andCharging Enforcement Function, abbreviation PCEF) function) delivering service quality (Qualityof Service is called for short QoS) and charging policy control information etc.

In the packet-based core networks LTE/SAE of evolution, MME is responsible for being connected with the chain of command of E-UTRAN network by S1-MME interface; S-GW is responsible for being connected with user's face of E-UTRAN network by S1-U interface.Simultaneously, MME is connected with SGSN by the S3 interface, is responsible for the mobility chain of command anchor point function of UE between 2G/3G and SAE network; S-GW is connected with SGSN by the S4 interface, is responsible for the mobility user face anchor point function of UE between 2G/3G and SAE network.Each interface shown in Fig. 1 network element is all followed standard communication protocol.

Embodiment below respectively is described in detail in detail all is with application scenarios shown in Figure 1 is example, and the technical scheme of the embodiment of the invention is described.Respectively describe in detail among the embodiment following, the current place of subscriber equipment network is source network, and source network node can comprise source base station, source gateway or source mobile management network element; Another network that subscriber equipment moves to is objective network, and target network node can comprise target BS, destination service gateway or target mobility management network element.In subscriber equipment generation area change procedure, the base station of UE region is changed to target BS by source base station, but other network elements, may change as gateway and mobile management network element, may not change yet, that is: the source gateway can be identical S-GW with the destination service gateway, also can be different S-GW; The source mobile management network element can be identical MME with the target managed network element, also can be different MME.In the LTE/SAE network, the resource that is used to send with the corresponding upstream data of subscriber equipment is ascending resource; The resource that is used to send with subscriber equipment corresponding downstream data is downlink resource.

Fig. 2 is a kind of method for releasing resource first embodiment flow chart of the present invention.The present embodiment executive agent can be the source base station of UE.As shown in Figure 2, present embodiment comprises:

Step 21, when user plane bearer switches to objective network, whether judgment data is transmitted and to be finished.

In the LTE/SAE network, the UE that is in connection status enters into the control area of target BS from the source base station control area, corresponding gateway (that is: source gateway and destination service gateway) can be same gateway before and after the UE area change, or is different gateways.When destination service gateway and source gateway were same gateway, source base station knew that the corresponding user plane bearer of subscriber equipment has switched to the mode of the information of objective network, first identification information that can send by the reception sources gateway; When the destination service gateway is different gateway with the source gateway, source base station knows that the corresponding user plane bearer of subscriber equipment has switched to the mode of the information of objective network, can be by receiving first identification information that P-GW sends to source base station through the source gateway; This first identification information is used for expression and has switched to objective network with the corresponding user plane bearer of UE.

When source base station knows that the corresponding user plane bearer of subscriber equipment has switched to objective network, can judge that its data is transmitted whether to finish, concrete, can comprise: judge the upstream data of subscriber equipment and downlink data whether all forwarding finish; Perhaps, judge respectively whether to transmit and finish, and whether judgement and subscriber equipment corresponding downstream data are transmitted and finished with the corresponding upstream data of subscriber equipment.

Step 22, when data forwarding is finished, discharge and the corresponding resource of subscriber equipment.

Corresponding to source base station concrete judgement content in step 21, in the step 22, source base station can discharge and the corresponding resource of subscriber equipment neatly according to judged result.Concrete, source base station can discharge all resources relevant with subscriber equipment all transmitting when finishing with corresponding upstream data of subscriber equipment and downlink data, as: all ascending resource and the downlink resources relevant with subscriber equipment; Perhaps, will independently carry out with the dispose procedure of corresponding ascending resource of subscriber equipment and downlink resource, as: can when finishing, discharge the ascending resource relevant at source base station with subscriber equipment with the corresponding upstream data forwarding of subscriber equipment; And can when finishing, discharge the downlink resource relevant with subscriber equipment with subscriber equipment corresponding downstream data forwarding at source base station.

If data forwarding is not finished, source base station just carries out the operation of step 22 after waiting for that then the corresponding data forwarding is finished, to guarantee the integrality of data forwarding.

In addition, on release and the corresponding resource delivery mode of subscriber equipment, can select delivery mode immediately, as: when data forwarding is finished, discharge respective resources immediately; Or employing timing delivery mode, as: start timer, when timer expiry, discharge respective resources, the concrete duration of timer can be provided with according to actual needs.

Step 23, send identification information to target BS or source gateway, this identification information is used to represent that data forwarding finishes.

Corresponding to source base station different resource delivery mode in step 22, in the step 23, source base station sends the different identification information of expression to target BS or source gateway, by different identification informations, informs that target BS or source gateway are about the concrete condition of source base station about data forwarding; Target BS or source gateway can select to discharge corresponding resource according to the identification information that receives.

For example: identification information can comprise second identification information, the 3rd identification information or the 4th identification information.Source base station can send second identification information to target BS or source gateway transmitting when all finishing with the corresponding upstream data of subscriber equipment and downlink data, and this second identification information is used to represent that upstream data and downlink data have all been transmitted finishes; Target BS or source gateway can be selected to discharge and corresponding ascending resource of subscriber equipment and downlink resource according to second identification information, and be concrete, and the source gateway can be selected to discharge and corresponding all ascending resources of subscriber equipment and downlink resource; Target BS can select to discharge corresponding with subscriber equipment, as to be used for data forwarding ascending resource and downlink resource.Perhaps, source base station can send the 3rd identification information to target BS or source gateway transmitting when finishing with the corresponding upstream data of subscriber equipment, and the 3rd identification information is used to represent that upstream data has been transmitted finishes; The source gateway can be selected to discharge and corresponding all ascending resources of subscriber equipment; Target BS can select to discharge corresponding with subscriber equipment, as to be used for data forwarding ascending resource.Source base station also can send the 4th identification information to target BS or source gateway when finishing with subscriber equipment corresponding downstream data forwarding, the 4th identification information is used to represent that downlink data has been transmitted finishes; The source gateway can be selected to discharge and corresponding all downlink resources of subscriber equipment; Target BS can select to discharge corresponding with subscriber equipment, as to be used for data forwarding downlink resource.

The new method that present embodiment provides a kind of resource to discharge.What be different from prior art is, when the present embodiment source base station is finished when the carrying of the target in objective network foundation, can judge by self and optionally discharge respective resources, and, make target BS or source gateway to discharge respective resources according to this identification information selectivity to target BS or the completed identification information of source gateway data forwarding.On source base station resource delivery mode, can be when upstream data and downlink data be all finished, unified all resources that discharge subscriber equipment; Also the release of ascending resource and the release of downlink resource are separately being carried out; In addition, can select delivery mode immediately for use, also can select regularly delivery mode for use; Thereby present embodiment promptly guaranteed the integrality of data forwarding, helps improving flexibility of resource release again.

Fig. 3 is a kind of method for releasing resource second embodiment signaling diagram of the present invention.Present embodiment and difference embodiment illustrated in fig. 2 are: the UE that present embodiment is in connection status enters into the control area of target BS from the source base station control area, all do not change with subscriber equipment corresponding M ME and S-GW, promptly the source gateway is that same services gateway, source mobile management network element and target mobility management network element are identical mobile management network element with the destination service gateway; The path of data forwarding be source base station to target BS, subscriber equipment need carry out X2 interface control information and the transmission data switching.When present embodiment switches to objective network in user plane bearer, the corresponding resource of source of release base station and subscriber equipment (can comprise corresponding all resources of source base station and subscriber equipment), and discharge corresponding on the target BS, as to be used for data forwarding resource with subscriber equipment.

As shown in Figure 3, the handoff procedure of X2 interface control information and transmission data comprises: stages three part is finished in handoff preparation phase, handover execution stage and switching.In handoff preparation phase, source base station can the notification target base station be the UE reserved resource, and wherein, reserved resource is mainly used in upstream data and downlink data is transmitted required resource.If in the resource reservation success of target BS, target BS returns confirmation to source base station, and informs that source base station is used for the address information of up-downgoing data forwarding.When source base station receives the affirmation information of target BS transmission, source base station freezes to the transmission of the upstream data of S-GW and to the transmission of the downlink data of UE, and the address information by the uplink and downlink data forwarding that receives is transmitted the data of uplink and downlink to target BS.Handover execution stage is mainly finished the handoff procedure of eating dishes without rice or wine, and comprises that UE is that UE distributes access channel etc. to synchronous, the Target cell of Target cell.When handoff preparation phase and handover execution stage are all finished, switch the stage of finishing, shown in step 31-step 38.

Step 31, target BS are to MME transmit path handoff request.

In the handoff procedure of X2 interface control information and transmission data, when handoff preparation phase and handover execution stage are finished, the Radio Resource of the corresponding air interface of subscriber equipment has switched to target BS from source base station, and target BS can be informed MME by path handoff request message.

Step 32, MME send the carrying request of setting up to S-GW when the path handoff request that receives that target BS sends.

When step 33, S-GW finish in carrying foundation, send first identification information to source base station.This first identification information can be used as a special packet and issues separately, also can be used as an information word that is added in the existing message, is used to represent that user plane bearer has switched to objective network.

When step 34, S-GW finish in carrying foundation, send bearing response message to MME.

Step 35, MME are to target BS transmit path switching request acknowledgement message.

Step 36, source base station receive first identification information and when data forwarding is finished, discharge and the corresponding resource of subscriber equipment.

Wherein, source base station judges at first whether self and the corresponding data forwarding of subscriber equipment are finished when receiving first identification information; If finish, discharge and the corresponding resource of subscriber equipment; If do not finish, then wait for when corresponding data forwarding is finished, discharge and the corresponding resource of subscriber equipment again.

When source base station judges whether self finishes about the corresponding data forwarding of subscriber equipment, can specifically comprise: judge whether the upstream data of subscriber equipment and downlink data are all transmitted and finish; Perhaps, judge respectively whether to transmit and finish, and whether judgement and subscriber equipment corresponding downstream data are transmitted and finished with the corresponding upstream data of subscriber equipment; Specifically see for details embodiment illustrated in fig. 2 in, the literature record of step 21; On source base station resource delivery mode, can be when upstream data and downlink data be all finished, unified release and corresponding all ascending resources of subscriber equipment and downlink resource; Also the release of ascending resource and the release of downlink resource are separately being carried out; In addition, can select delivery mode immediately for use, also can select regularly delivery mode for use; Specifically see for details embodiment illustrated in fig. 2 in, the literature record of step 22 repeats no more.

Step 37, source base station send identification information to target BS, and this identification information is used to represent that data forwarding finishes.

Corresponding to source base station different resource delivery mode in step 36, in the step 37, source base station sends the different identification information of expression to target BS or source gateway, by different identification informations, informs that target BS or source gateway are about the concrete condition of source base station about data forwarding.For example: source base station sends second identification information, the 3rd identification information or the 4th identification information to target BS; Wherein, second identification information is used to represent that source base station upstream data and downlink data have all been transmitted finishes; The 3rd identification information is used to represent that the source base station upstream data has been transmitted finishes; The 4th identification information is used to represent that the source base station downlink data has been transmitted finishes.

Step 38, target BS discharge corresponding with subscriber equipment, as to be used for data forwarding resource according to the identification information that receives.

Corresponding to the different identification information that source base station sends to target BS in step 37, target BS optionally discharges respective resources.Concrete, when target BS receive be second identification information time, can select to discharge corresponding with subscriber equipment, as to be used for data forwarding ascending resource and downlink resource; When target BS receive be the 3rd identification information the time, can select to discharge corresponding with subscriber equipment, as to be used for data forwarding ascending resource; When target BS receive be the 4th identification information the time, can select to discharge corresponding with subscriber equipment, as to be used for data forwarding downlink resource.

On the concrete mode of target BS release resource, can adopt delivery mode immediately, as: when receiving identification information, discharge respective resources immediately; Or the timing delivery mode, as: start timer, when timer expiry, discharge respective resources, the concrete duration of timer can be provided with according to actual needs.

In the present embodiment, there is not the restriction of sequential relationship between step 33 and the step 34.

When the present embodiment source base station is finished when the carrying of the target in objective network foundation, can judge by self and optionally discharge respective resources, and, make source base station and target BS all can discharge respective resources neatly to the completed identification information of target BS transmission data forwarding; On the resource delivery mode, can be when upstream data and downlink data be all finished, unified all resources that discharge subscriber equipment; Also the release of ascending resource and the release of downlink resource are separately being carried out; In addition, can select delivery mode immediately for use, also can select regularly delivery mode for use; Thereby present embodiment helps further improving flexibility of resource release again in the integrality that guarantees data forwarding.

Fig. 4 is a kind of method for releasing resource the 3rd embodiment signaling diagram of the present invention.Present embodiment and difference embodiment illustrated in fig. 3 are: the UE that present embodiment is in connection status enters into the control area of target BS from the source base station control area, do not change with subscriber equipment corresponding M ME, but S-GW changes, and promptly the source gateway is that different gateways, source mobile management network element and target mobility management network element are identical mobile management network element with the destination service gateway.When present embodiment switches to objective network in user plane bearer, need the corresponding resource of source of release base station, target BS and source gateway and subscriber equipment.

In handoff preparation phase, target BS is the resource that user equipment allocation is used for upstream data and downlink data forwarding, as: for user equipment allocation is used for the address information (Tunnel EndpointIdentifier, be called for short TEID) of data forwarding, this address information is informed source base station; In handover execution stage, the address information that be used for data forwarding of source base station by receiving is to target BS forwarding uplink data and downlink data.The path of present embodiment data forwarding is from the source base station to the target BS.When handoff preparation phase and handover execution stage were all finished, operation was switched and is finished the flow process in stage, shown in step 41-step 413.

Step 41, target BS are to MME transmit path handoff request.

Step 42, MME send the carrying request of setting up to the destination service gateway when the path handoff request that receives that target BS sends.

Step 43, destination service gateway send more new bearer request to P-GW.

Step 44, P-GW send first identification information via the source gateway to source base station; This first identification information can be used as a special packet and issues separately, also can be used as an information word that is added in the existing message, is used to represent that user plane bearer has switched to objective network.

Step 45, P-GW send more new bearer response to the destination service gateway.

Step 46, destination service gateway send to MME and set up the carrying response.

Step 47, MME are to target BS transmit path switching request acknowledgement message.

Step 48, source base station receive first identification information and when data forwarding is finished, discharge and the corresponding resource of subscriber equipment.

Source base station discharges the specific descriptions with the subscriber equipment respective resources, can repeat no more referring to the record of step 36 in embodiment illustrated in fig. 3.

Step 49, source base station send identification information to target BS, and this identification information is used to represent that data forwarding finishes.

Source base station can repeat no more referring to the record of step 37 in embodiment illustrated in fig. 3 to the specific descriptions of target BS transmission identification information.

Step 410, target BS discharge corresponding with subscriber equipment, as to be used for data forwarding resource according to the identification information that receives.

Target BS discharges the specific descriptions with the subscriber equipment respective resources, can repeat no more referring to the record of step 38 in embodiment illustrated in fig. 3.

Step 411, source base station send carrying to MME and discharge request.Perhaps, step 411 also can be target BS and sends carrying release request to MME, that is: target BS is receiving the path switching request acknowledgement message of step 47, and has finished after the respective resources release of step 410, sends carrying to MME and discharges the request (not shown).

Step 412, MME discharge request according to carrying, send the deleting bearing request to the source gateway, and this deleting bearing request is used for deletion of request source gateway and the corresponding resource of subscriber equipment.

Step 413, source gateway discharge and corresponding all resources of subscriber equipment during according to the deleting bearing request that receives.Wherein, the resource of the subscriber equipment of source gateway release can comprise corresponding all user's face resources of this subscriber equipment and chain of command resource.

In the present embodiment, there is not the restriction of sequential relationship between step 44 and the step 45.

Present embodiment is being realized under the prerequisite that guarantees data integrity, on the basis of the flexibility of raising source base station and target BS respective resources, also can be when source base station be finished data forwarding, send carrying to MME and discharge request, discharge and the corresponding resource of subscriber equipment by MME indication source serving BS, make that the resource delivery mode is more flexible, since on source base station and the source gateway with corresponding all resources of subscriber equipment, target BS on resource corresponding with subscriber equipment, that be used for data forwarding all obtained release, therefore obviously saved Internet resources.

Fig. 5 is a kind of method for releasing resource the 4th embodiment signaling diagram of the present invention.Present embodiment and difference embodiment illustrated in fig. 4 are: the path of present embodiment data forwarding is: arrive target BS at last through the destination service gateway again from source base station to the source gateway; Subscriber equipment need carry out the control information of S1 interface and the switching of transmission data.This S1 interface comprises S1-MME interface and S1-u interface.

The handoff procedure of S1 interface control information and transmission data comprises: stages three part is finished in handoff preparation phase, handover execution stage and switching.In handoff preparation phase, determine that by source base station which data need transmit, and the mode that specified data is transmitted is directly to transmit or transmit indirectly.If the mode of data forwarding is directly to transmit, then the path of data forwarding is: from the source base station to the target BS; Directly pass-through mode can be used for the situation that source base station and target BS directly exist IP to be connected.The switching flow of this direct pass-through mode is identical with the switching flow of X2 interface, can repeat no more referring to Fig. 3 and record embodiment illustrated in fig. 4.

Fig. 5 shows the handoff procedure that the data forwarding mode is indirect pass-through mode.If the mode of data forwarding is to transmit indirectly, then the path of data forwarding is: arrive target BS at last through the destination service gateway again from source base station to the source gateway.This indirect pass-through mode can be used for not existing IP to connect between source base station and the target BS or the situation of direct retransmission failure.In this process, target BS, source gateway and destination service gateway all need to be used for for user equipment allocation the resource of data forwarding.Mainly finish the handoff procedure of eating dishes without rice or wine in handover execution stage, comprise that subscriber equipment is that target device distributes access channel etc. to synchronous, the Target cell of Target cell.When handoff preparation phase and handover execution stage were all finished, operation was switched and is finished the flow process in stage, shown in step 51-step 514.

Step 51, target BS are to MME transmit path handoff request.

Step 52, MME send the carrying request of setting up to the destination service gateway when the path handoff request that receives that target BS sends.

Step 53, destination service gateway send more new bearer request to P-GW.

Step 54, P-GW send first identification information through the source gateway to source base station; This first identification information can be used as a special packet and issues separately, also can be used as an information word that is added in the existing message, is used to represent that user plane bearer has switched to objective network.

Step 55, P-GW send more new bearer response to the destination service gateway.

Step 56, destination service gateway send to MME and set up the carrying response.

Step 57, MME are to target BS transmit path switching request acknowledgement message.

Step 58, source base station receive first identification information and when data forwarding is finished, discharge and the corresponding resource of subscriber equipment.

Step 59, source base station send identification information to the source gateway, and this identification information is used to represent that data forwarding finishes.

Corresponding to the different resource delivery mode of source base station, source base station sends different identification informations to the source gateway, by different identification informations, informs the concrete condition of source gateway about the source base station data forwarding.For example: source base station sends second identification information, the 3rd identification information or the 4th identification information to the destination service gateway; Wherein, second identification information is used to represent that source base station upstream data and downlink data have all been transmitted finishes; The 3rd identification information is used to represent that the source base station upstream data has been transmitted finishes; The 4th identification information is used to represent that the source base station downlink data has been transmitted finishes.

Step 510, source gateway discharge and the corresponding resource of subscriber equipment according to the identification information that receives.

Corresponding to the different identification information that source base station sends to the source gateway in step 59, the source gateway optionally discharges respective resources.Concrete, when the source gateway receive be second identification information time, can select to discharge and corresponding all ascending resources of subscriber equipment and downlink resource; When the source gateway receive be the 3rd identification information the time, can select to discharge and the corresponding ascending resource of subscriber equipment; When the source gateway receive be the 4th identification information the time, can select to discharge and subscriber equipment corresponding downstream resource.

On the concrete mode of source gateway release resource, can adopt delivery mode immediately, as: when receiving identification information, discharge respective resources immediately; Or the timing delivery mode, as: start timer, when timer expiry, discharge respective resources, the concrete duration of timer can be provided with according to actual needs.

The identification information that step 511, source gateway receive to the destination service gateway forwards; The identification information of transmitting can comprise second identification information, the 3rd identification information or the 4th identification information.

Step 512, destination service gateway optionally discharge corresponding resource according to the identification information that receives; For example: when the destination service gateway receive be second identification information time, can select to discharge corresponding with subscriber equipment, as to be used for data forwarding ascending resource and downlink resource; When the destination service gateway receive be the 3rd identification information the time, can select to discharge corresponding with subscriber equipment, as to be used for data forwarding ascending resource; When the destination service gateway receive be the 4th identification information the time, can select to discharge corresponding with subscriber equipment, as to be used for data forwarding downlink resource.

On the concrete mode of destination service gateway release resource, can adopt delivery mode immediately, as: when receiving identification information, discharge respective resources immediately; Or the timing delivery mode, as: start timer, when timer expiry, discharge respective resources, the concrete duration of timer can be provided with according to actual needs.

Step 513, destination service gateway are transmitted the identification information that receives to target BS; The identification information of transmitting can comprise second identification information, the 3rd identification information or the 4th identification information.

Step 514, target BS optionally discharge corresponding resource according to the identification information that receives; For example: when target BS receive be second identification information time, can select to discharge corresponding with subscriber equipment, as to be used for data forwarding ascending resource and downlink resource; When target BS receive be the 3rd identification information the time, can select to discharge corresponding with subscriber equipment, as to be used for data forwarding ascending resource; When target BS receive be the 4th identification information the time, can select to discharge corresponding with subscriber equipment, as to be used for data forwarding downlink resource.

In the present embodiment, the sequential relationship between step 54 and the step 55 is unrestricted.

When present embodiment was finished when the carrying of the target in objective network foundation, source base station can be judged by self optionally discharge respective resources; Send the completed identification information of data forwarding to the source gateway, the source gateway of making can discharge respective resources neatly according to identification information; To this identification information of destination service gateway forwards, make the destination service gateway to discharge respective resources neatly according to identification information; In addition, also transmit this identification information to target BS, make target BS to discharge respective resources neatly according to identification information by the destination service gateway; Thereby realize when data forwarding is finished, data forwarding by way of each network element on can obtain release with the corresponding resource of subscriber equipment, obviously saved Internet resources; Discharging on the mode of resource, on the resource delivery mode, can be when upstream data and downlink data be all finished, the unified respective resources that discharges subscriber equipment; Also the release of ascending resource and the release of downlink resource separately can be carried out; Can select delivery mode immediately for use, also can select regularly delivery mode for use; The mode that resource discharges is very flexible; Simultaneously, present embodiment is by the respective resources on identification information source of release network node (as: source base station and source gateway) and the target network node (as: target BS and destination service gateway), thereby reduced the quantity of chain of command signaling in the handoff procedure, further saved Internet resources.

Fig. 6 is a kind of base station of the present invention example structure schematic diagram.As shown in Figure 6, this base station comprises: judge module 61, the first resource release module 62 and identification information sending module 63.

Judge module 61 is used for when user plane bearer switches to objective network, and whether judgment data is transmitted and finished.

The first resource release module 62 is used for when data forwarding is finished, and discharges and the corresponding resource of subscriber equipment.

Identification information sending module 63 is used for sending identification information to target BS or source gateway, and described identification information represents that data forwarding finishes.

On the basis of technique scheme, the present embodiment base station also can comprise first receiver module 64.

First receiver module 64 is used for first identification information that the reception sources gateway sends, and activates described judge module; Described first identification information is used for expression and has switched to objective network with the corresponding user plane bearer of described subscriber equipment.This first identification information can be first identification information that the source gateway generates and sends, or first identification information that is generated and sent through the source gateway by packet data network gateway

On the basis of technique scheme, the present embodiment base station also can comprise first request sending module 65.This first request sending module 65 is used for sending carrying release to mobile management network element and asking after 62 releases of the first resource release module and the corresponding resource of subscriber equipment.Perhaps, in the present embodiment base station, the first resource release module 62 comprises first releasing unit 621 or first releasing unit 622 regularly immediately.

First when releasing unit 621 is used for data forwarding and finishes immediately, discharges and the corresponding resource of described subscriber equipment immediately.

First when regularly releasing unit 622 is used for data forwarding and finishes, and starts timer, when timer expiry, discharges and the corresponding resource of described subscriber equipment.

Further, identification information sending module 63 comprises the second identification information transmitting element 631.Perhaps, identification information sending module 63 comprises the 3rd identification information transmitting element 632 and the 4th identification information transmitting element 633.

The second identification information transmitting element 631 is used for all transmitting when finishing when upstream data and downlink data, sends second identification information to target BS or source gateway; Described second identification information is used to represent that upstream data and downlink data have all been transmitted finishes.

The 3rd identification information transmitting element 632 is used for sending the 3rd identification information to described target BS or source gateway when the upstream data forwarding is finished; Described the 3rd identification information is used to represent that upstream data has been transmitted finishes.

The 4th identification information transmitting element 633 is used for sending the 4th identification information to described target BS or source gateway when the downlink data forwarding is finished; Described the 4th identification information is used to represent that downlink data has been transmitted finishes.

In the base station that the embodiment of the invention provides, by judge module when user plane bearer switches to objective network, whether judgment data is transmitted and is finished, when data forwarding is finished, discharge and the corresponding resource of UE by the first resource release module, and pass through the identification information sending module to target BS or the completed identification information of source gateway data forwarding, make target BS or source gateway to discharge respective resources according to this identification information, thereby promptly guaranteed the integrality of data forwarding, helped improving flexibility of resource release again.The mutual workflow of a kind of base station embodiment of the present invention and other network elements can repeat no more referring to the record of the corresponding embodiment of Fig. 2-6.

Fig. 7 is another base station example structure schematic diagram of the present invention.As shown in Figure 7, this base station comprises: the 3rd receiver module 71 and the second resource release module 72.

The 3rd receiver module 71 is used to receive the identification information that the source base station of subscriber equipment sends, and described identification information is used to represent that described source base station data forwarding finishes.

The second resource release module 72 is used for according to described identification information, discharges and the corresponding resource of described subscriber equipment.

On the basis of technique scheme, the second resource release module 72 can comprise second releasing unit 721 or second releasing unit 722 regularly immediately.

Second immediately releasing unit 721 be used for when described the 3rd receiver module 71 receives described identification information, discharge immediately and the corresponding resource of described subscriber equipment.

The second timing releasing unit 722 is used for when described the 3rd receiver module 71 receives described identification information, starts timer, when timer expiry, discharges and the corresponding resource of described subscriber equipment.

Further, the second resource release module 72 comprises the first data forwarding resource releasing unit 723; Perhaps, the second resource release module 72 comprises the first ascending resource releasing unit 724 and the first downlink resource releasing unit 725.

The first data forwarding resource releasing unit 723 is used for discharging and corresponding ascending resource of described subscriber equipment and downlink resource when receiving described second identification information; Described second identification information is used to represent that described source base station upstream data and downlink data have all been transmitted finishes.

The first ascending resource releasing unit 724 is used for discharging and the corresponding ascending resource of described subscriber equipment when receiving described the 3rd identification information; Described the 3rd identification information is used to represent that upstream data has been transmitted finishes.

The first downlink resource releasing unit 725 is used for discharging and described subscriber equipment corresponding downstream resource when receiving described the 4th identification information; Described the 4th identification information is used to represent that downlink data has been transmitted finishes.

On the basis of technique scheme, the present embodiment base station also can comprise second request sending module 73.This second request sending module 73 is used for sending carrying release to mobile management network element and asking after 72 releases of the second resource release module and the corresponding resource of subscriber equipment.

In another base station that the embodiment of the invention provides, when receiving the completed identification information of source base station data forwarding of expression subscriber equipment, discharge and the corresponding resource of subscriber equipment, thereby promptly guaranteed the integrality of data forwarding, help improving flexibility of resource release again.The mutual workflow of another base station of the present invention embodiment and other network elements can repeat no more referring to the record of the corresponding embodiment of Fig. 2-6.

Fig. 8 is a gateway example structure schematic diagram of the present invention.As shown in Figure 8, this gateway comprises: the 4th receiver module 81 and information resources release module 82.

The 4th receiver module 81 is used to receive the identification information that the source base station of subscriber equipment sends, and described identification information is used to represent that described source base station data forwarding finishes.

Information resources release module 82 is used for according to described identification information, discharges and the corresponding resource of described subscriber equipment.

On the basis of technique scheme, information resources release module 82 can comprise: the 3rd releasing unit 821 or the 3rd releasing unit 822 regularly immediately.

The 3rd immediately releasing unit 821 be used for when described the 4th receiver module 81 receives described identification information, discharge immediately and the corresponding resource of described subscriber equipment.

The 3rd timing releasing unit 822 is used for when described the 4th receiver module 81 receives described identification information, starts timer, when timer expiry, discharges and the corresponding resource of described subscriber equipment.

In addition, the present embodiment gateway also can comprise forwarding module 83.This forwarding module 83 is used for transmitting described identification information to destination service gateway or target BS.Further, information resources release module 82 can comprise that second transmits data resource releasing unit 823; Perhaps, information resources release module 82 can comprise the second ascending resource releasing unit 824 and the second downlink resource releasing unit 825.

Second transmits data resource releasing unit 823 is used for when the identification information that the 4th receiver module 81 receives is second identification information, discharges and corresponding ascending resource of described subscriber equipment and downlink resource; Described second identification information is used to represent that described source base station upstream data and downlink data have all been transmitted finishes.

The second ascending resource releasing unit 824 is used for when the identification information that the 4th receiver module 81 receives is the 3rd identification information, discharges and the corresponding ascending resource of described subscriber equipment; Described the 3rd identification information is used to represent that upstream data has been transmitted finishes.

The second downlink resource releasing unit 825 is used for when the identification information that the 4th receiver module 81 receives is the 4th identification information, discharges and described subscriber equipment corresponding downstream resource; Described the 4th identification information is used to represent that downlink data has been transmitted finishes.

In the gateway that the embodiment of the invention provides, when receiving the completed identification information of source base station data forwarding of expression subscriber equipment, discharge and the corresponding resource of subscriber equipment, thereby promptly guaranteed the integrality of data forwarding, help improving flexibility of resource release again.The mutual workflow of gateway embodiment of the present invention and other network elements can repeat no more referring to the record of the corresponding embodiment of Fig. 3-6.

Fig. 9 is a kind of resource delivery system of the present invention example structure schematic diagram.As shown in Figure 9, resource delivery system of the present invention comprises source base station 91, target BS 92 or source gateway 93.

Source base station 91 is used for when user plane bearer switches to objective network, and whether judgment data is transmitted and finished; When data forwarding is finished, discharge and the corresponding resource of subscriber equipment; Send identification information to target BS or source gateway, described identification information is used to represent that described source base station data forwarding finishes.

Target BS 92 is used for discharging and the corresponding resource of described subscriber equipment according to the described identification information that receives, and this resource can comprise corresponding with subscriber equipment, as to be used for data forwarding resource.

Source gateway 93 is used for discharging and the corresponding resource of described subscriber equipment according to the described identification information that receives, and this resource can comprise and corresponding all the chain of command resources of subscriber equipment and user's face resource.

On the basis of technique scheme, native system also can comprise mobile management network element 94.

Source base station 91 also is used for after release and the corresponding resource of described subscriber equipment, sends carrying release to mobile management network element 94 and asks.

Mobile management network element 94 is used to receive described carrying and discharges request, sends the deleting bearing request to source gateway 93;

Source gateway 93 also is used for according to described deleting bearing request, discharges and the corresponding resource of described subscriber equipment.

On the basis of technique scheme, native system also can comprise destination service gateway 95.

Source gateway 93 also is used for transmitting described identification information to destination service gateway 95.

Destination service gateway 95 is used for discharging and the corresponding resource of described subscriber equipment according to the described identification information that receives.In addition, destination service gateway 95 also can be used for transmitting described identification information to target BS 92.

In the resource delivery system that the embodiment of the invention provides, when user plane bearer switches to objective network, whether source base station is transmitted by judgment data and is finished, when data forwarding is finished, discharge and the corresponding resource of UE, and, make target BS or source gateway to discharge respective resources according to this identification information to target BS or the completed identification information of source gateway data forwarding, thereby promptly guaranteed the integrality of data forwarding, helped improving flexibility of resource release again.Among a kind of resource delivery system of the present invention embodiment, the mutual workflow of each network element can be referring to the record of the embodiment of Fig. 2-6 correspondence; Each network element refined structure embodiment can repeat no more referring to the record of the embodiment of Fig. 7-8 correspondence.

Figure 10 is another method for releasing resource first embodiment flow chart of the present invention.As shown in figure 10, present embodiment comprises:

Step 101, when user plane bearer switches to objective network, start timer; The resource that this timer is used for the target network node of supervisory user equipment discharges constantly.

Target network node can comprise target BS and destination service gateway.

Step 102, when timer expiry, send first indication information to target network node; Wherein, first indication information is used to indicate described target network node to discharge and the corresponding resource of described subscriber equipment.

What need on the target network node to discharge can comprise with the corresponding resource of subscriber equipment: on target BS or the destination service gateway, be used for the resource of data forwarding accordingly with subscriber equipment.

The executive agent of present embodiment can be MME.On the basis of technique scheme, the resource that this timer also can be used for monitoring the source network node of described subscriber equipment discharges constantly.In this case, when timer expiry, MME sends first indication information to source network node; Wherein, first indication information also is used to indicate source network node to discharge and the corresponding resource of described subscriber equipment.

The inventor finds in realizing method for releasing resource embodiment process of the present invention, prior art is finished the stage in switching, when core net and subscriber equipment carry accordingly switch finish after, MME can start a timer, this timer be used to monitor to source network node, with the release of the corresponding resource of subscriber equipment constantly.In fact, this timer can be used for the monitoring objective network node equally, with the release moment of the corresponding resource of subscriber equipment (as: resource that is used for data forwarding).This be because, in order to guarantee the integrality of proper communication and data forwarding, it is to finish successful switch in the carrying of core net that the source network node resource discharges primary condition, just and the data forwarding of source network node be released after also finishing.Therefore, for discharging the respective resources on the target network node, can carry out a spot of improvement on the basis of existing technology, when not increasing system complexity, realize on this timer monitor source network node and the target network node, discharge constantly with the corresponding resource of subscriber equipment.

Target network node can comprise destination service gateway or target BS, and this moment, first indication information comprised second indication information.This second indication information is used to indicate destination service gateway or target BS to discharge corresponding with subscriber equipment, as to be used for data forwarding resource.The mode that sends second indication information to destination service gateway or target BS can be very flexible, for example: second indication information is added in the existing message, sends as an indication information unit in the existing message; Perhaps, second indication information is sent as a predefined new information, or the like.

Present embodiment provides a kind of new method for releasing resource, and when user plane bearer switched to objective network, MME can start timer, and the resource of the target network node by timer supervisory user equipment discharges constantly; When timer expiry, the release respective resources of indicating target network node, thus save target network resource.In addition, for the prior art compatibility, but this timer also the resource of monitor source network node discharge constantly.Present embodiment can be done a spot of improvement on the basis of existing technology and can realize, has reduced complexity, has improved flexibility of resource release simultaneously.

Figure 11 is another method for releasing resource second embodiment signaling diagram of the present invention.The difference of present embodiment and embodiment shown in Figure 10 is, the UE that present embodiment is in connection status enters into the control area of target BS from the source base station control area, do not change with subscriber equipment corresponding M ME, but S-GW changes, and promptly the source gateway is that different gateways, source mobile management network element and target mobility management network element are identical mobile management network element with the destination service gateway.Present embodiment relates to the control information of X2 interface and the switching of transmission data, and what need to discharge comprises with the corresponding resource of subscriber equipment:, the resource that be used for data forwarding corresponding of target BS and source base station and source gateway and subscriber equipment with subscriber equipment accordingly, be used to transmit all resources of data.

In handoff preparation phase, target BS is the resource that user equipment allocation is used for upstream data and downlink data forwarding, as: for user equipment allocation is used for the address information (Tunnel EndpointIdentifier, be called for short TEID) of data forwarding, this address information is informed source base station; In handover execution stage, the address information that be used for data forwarding of source base station by receiving is to target BS forwarding uplink data and downlink data.The path of present embodiment data forwarding is from the source base station to the target BS.When handoff preparation phase and handover execution stage were all finished, operation was switched and is finished the flow process in stage.The handoff procedure of X2 interface control information and transmission data is shown in step 111-step 1112.

Step 111, target BS are to MME transmit path handoff request.Finish in switching preparation and handover execution stage, be after the Radio Resource of air interface has switched to target BS from source eNB, target BS informs that by path handoff request message MME UE has changed the sub-district, and carries air interface and set up successful Radio Resource tabulation in this message.

MME is that subscriber equipment is reselected the S-GW into its service, i.e. destination service gateway, and wherein, MME is that the choice mechanism of subscriber equipment select target gateway can specifically be provided with (not shown) based on factors such as operator's preference, network topology structures.

Step 112, MME send the carrying request of setting up to the destination service gateway when the path handoff request that receives that target BS sends.

MME initiates to set up the carrying request by receiving the path handoff request to the destination service gateway.Set up the user surface address information TEID that can comprise target BS in the carrying request, be used for carrying out the transmission of downlink data by this address information after the handover success.The destination service gateway is that this carrying distributes uplink resource after receiving foundation carrying request, is TEID of transfer of data distribution of up link.

Step 113, destination service gateway send more new bearer request to P-GW.

The destination service gateway is the TEID of P-GW allocation of downlink transfer of data, and informs that by new bearer request more P-GW is used for the descending TEID information of downlink data transmission.

Step 114, P-GW send more new bearer response to the destination service gateway.

P-GW upgrades the address information of S-GW, promptly covers the address of source gateway with the address of destination service gateway, and by upgrading the TEID that bearing response message notification target gateway P-G is used to send downlink data.At this moment, P-GW just can send downlink data by the destination service gateway, and the destination service gateway also can send downlink data by target BS.The required carrying switching of downlink data transmission is finished.

Step 115, destination service gateway send to MME and set up the carrying response.

The destination service gateway sends to MME and sets up the carrying response, and wherein carrying the destination service gateway is that upstream data transmits the TEID that distributes.

Step 116, MME start timer.

MME receives after this message, starts a timer, this timer be used for all bearing resources of monitor source gateway and target BS data forwarding resource release constantly.This timer can be provided with according to the actual needs of operator.In order to guarantee the integrality of data forwarding, the duration that is provided with of timer is answered compound source network node (comprising source base station and source gateway) the required time of data forwarding.

Step 117, MME are to target BS transmit path handoff response.

The up TEID of portability destination service gateway in this path handoff response makes target BS to send upstream data to PDN GW by the destination service gateway.

Step 118, target BS send the release resource request to source base station after receiving the path handoff response, be used for the notification source base station and discharge and the corresponding resource of subscriber equipment.

When timer expiry that step 116 is provided with, MME initiates the respective resources release flow process of source network node (comprising the source gateway) and target network node (comprising target BS), shown in step 119-step 1112.

Step 119, MME send the deleting bearing request to the source gateway, are used to indicate source gateway deletion and the corresponding resource of subscriber equipment.

After step 1110, source gateway discharge respective resources, send the resource response information that discharges to MME.

Step 1111, MME send second indication information to target BS, are used to indicate target BS to discharge corresponding with subscriber equipment, as to be used for data forwarding resource.

Step 1112, target BS are released in the resource that is used for the up-downgoing data forwarding that handoff preparation phase is distributed according to second indication information that receives, and send the resource response information that discharges to MME.

In the present embodiment, the sequential relationship between step 119 and the step 1111 is unrestricted, and promptly the two does not have inevitable temporal order.

In the present embodiment step 1111, MME is very flexible to the mode that target BS sends second indication information, for example: second indication information is added in the existing message, sends as an indication information unit in the existing message, shown in step 1111a; Perhaps, second indication information is sent as a predefined new information, shown in step 1111b.

Second indication information can be used as an indication information unit in the existing message, as: this indication information unit is for discharging data forwarding resource indication information unit (Release Data Forwarding ResourceIndicator), be used to indicate target BS to discharge corresponding with subscriber equipment, as to be used for data forwarding resource, at this moment, step 1111 is step 1111a:

Step 1111a, MME add release data forwarding resource indication information unit in resource release request message, send to target BS and carry the resource release request message that discharges data forwarding resource indication information unit.

Table 1 is resource release request message embodiment one of the present invention.As shown in table 1, can discharge in the mutual existing resource of MME and target BS and add a new indication information unit in the request message: discharge data forwarding resource indication information unit (Release Data Forwarding Resource Indicator), be used to indicate target BS to discharge corresponding with subscriber equipment, as to be used for data forwarding resource.Target BS discharges corresponding with subscriber equipment, as to be used for data forwarding resource when receiving the resource release request message that carries release data forwarding resource indication information unit.

Table 1 is resource release request message embodiment one of the present invention

Information word or group name (IE/Group Name)	State (Prese nce)	Scope (Ran ge)	Type of information element and reference (IE type and reference)	Conceptual description (Semantics description)	Degree of danger (Critic ality)	The degree of danger (Assign ed Criti cality) of distributing
Information word or group name (IE/Group Name)	State (Prese nce)	Scope (Ran ge)		Conceptual description (Semantics description)	Degree of danger (Critic ality)		Type of message (Message Type)	Compulsory (M)	??9.2.1.1		Be (YES)	Refusal (reject)
??MME?UE?S1AP?ID	Compulsory (M)		??9.2.3.3		Be (YES)	Refusal (reject)	Type of message (Message Type)	Compulsory (M)	??9.2.1.1		Be (YES)	Refusal (reject)
??MME?UE?S1AP?ID	Compulsory (M)		??9.2.3.3		Be (YES)	Refusal (reject)	??eNB?UE?S1AP?ID	Compulsory (M)	??9.2.3.4		Be (YES)	Refusal (reject)
UE aggregate maximum bit rate (UE Aggregate Maximum Bit Rate)	(O) with good conditionsi		??9.2.1.20		Be (YES)	Refusal (reject)	??eNB?UE?S1AP?ID	Compulsory (M)	??9.2.3.4		Be (YES)	Refusal (reject)
	(O) with good conditionsi		??9.2.1.20		Be (YES)	Refusal (reject)	D/d SAE carrying tabulation (SAE Bearer To Be Released List)	Compulsory (M)	SAE carrying tabulation (SAE Bearer List) 9.2.1.36	SAE bearing identification value only is present in d/d SAE and carries in the list information unit (a value for SAE bearer identity shall only be present once in SAE Bearer To Be Released List IE)	Be (YES)	Ignore (ignore)
Discharge data forwarding resource indication (Re lease Data Forwarding Resource Indicator)	(0) with good conditionsi		??9.2.x.x	Be used to indicate eNB to discharge data forwarding resource (It is used to indi cate eNB release data forwarding resource)	Be (YES)	Refusal (reject)		Compulsory (M)	SAE carrying tabulation (SAE Bearer List) 9.2.1.36		Be (YES)	Ignore (ignore)

Resource release request message format shown in the table 2 is different with table 1, but all can discharge the new indication information unit of interpolation in the request message: discharge data forwarding resource indication information unit (ReleaseData Forwarding Resource Indicator), be used to indicate target BS to discharge corresponding with subscriber equipment, as to be used for data forwarding resource in existing resources.

Table 2 is resource release request message embodiment two of the present invention

Information word or group name (IE/Group Name)	State (Prese nce)	Scope (Rang e)	Type of information element and reference (IE type and reference)	Conceptual description (Semantics description)	Degree of danger (Critic ality)	The degree of danger (Assigne d Criti cality) of distributing
Information word or group name (IE/Group Name)	State (Prese nce)	Scope (Rang e)		Conceptual description (Semantics description)	Degree of danger (Critic ality)		Type of message (Message Type)	Compulsory (M)	??9.2.1.1	Be (YES)	Refusal (reject)
??MME?UE?S1AP?ID	Compulsory (M)		??9.2.3.3		Be (YES)	Refusal (reject)	Type of message (Message Type)	Compulsory (M)	??9.2.1.1	Be (YES)	Refusal (reject)
??MME?UE?S1AP?ID	Compulsory (M)		??9.2.3.3		Be (YES)	Refusal (reject)	??eNB?UE?S1AP?ID	Compulsory (M)	??9.2.3.4	Be (YES)	Refusal (reject)
UE aggregate maximum bit rate (UE Aggregate Maximum Bit Rate)	(0) with good conditionsi		??9.2.1.20		Be (YES)	Refusal (reject)	??eNB?UE?S1AP?ID	Compulsory (M)	??9.2.3.4	Be (YES)	Refusal (reject)
	(0) with good conditionsi		??9.2.1.20		Be (YES)	Refusal (reject)	D/d SAE carrying tabulation (SAE Bearer To Be Released List)	Compulsory (M)		Be (YES)	Refusal (reject)
D/d SAE carrying list information (the SAE Bearer To Be Released Item IEs of unit		??1to ??<maxno ??of ??SAEbea ??rers>			Each (EACH)	Refusal (reject)		Compulsory (M)		Be (YES)	Refusal (reject)
		??1to ??<maxno ??of ??SAEbea ??rers>			Each (EACH)	Refusal (reject)	SAE bearing identification (SAE Bearer ID)	Compulsory (M)	??9.2.1.2
Discharge data forwarding resource indication (Release Data Forwarding Resource Indicator)	(O) with good conditionsi		??9.2.x.x	Be used to indicate eNB to discharge data forwarding resource (It is used to indicate eNB release data forwarding resource)	Be (YES)	Refusal (reject)	SAE bearing identification (SAE Bearer ID)	Compulsory (M)	??9.2.1.2

Second indication information is as sending in the predefined new information, for example: this new information is that deleted data is transmitted resource request message, be used to indicate target BS to discharge corresponding with subscriber equipment, as to be used for data forwarding resource, at this moment, step 1111 is step 1111b:

Step 1111b, MME send deleted data to target BS and transmit resource request message, are used to indicate target BS to discharge corresponding with subscriber equipment, as to be used for data forwarding resource.It is as shown in table 3 that deleted data is transmitted resource request message form embodiment.

Table 3 is transmitted resource request message embodiment one for deleted data of the present invention

Information word or group name (IE/Group Name)	State (Prese nce)	Scope (Ra nge)	Type of information element and reference (IE type and reference)	Conceptual description (Semantics description)	Degree of danger (Critic ality)	The degree of danger (Assigne d Criticali ty) of distributing
Information word or group name (IE/Group Name)	State (Prese nce)	Scope (Ra nge)		Conceptual description (Semantics description)	Degree of danger (Critic ality)		Type of message (Message Type)	Compulsory (M)	??9.2.1.1	Be (YES)	Refusal (reject)
??MME?UE?S1AP?ID	Compulsory (M)		??9.2.3.3		Be (YES)	Refusal (reject)	Type of message (Message Type)	Compulsory (M)	??9.2.1.1	Be (YES)	Refusal (reject)
??MME?UE?S1AP?ID	Compulsory (M)		??9.2.3.3		Be (YES)	Refusal (reject)	??eNB?UE?S1AP?ID	Compulsory (M)	??9.2.3.4	Be (YES)	Refusal (reject)
Be released the SAE carrying tabulation (SAE Bearer To Be Released Data Forwarding Resource List) of data forwarding resource	Compulsory (M)		SAE carrying tabulation (SAE Bearer List) 9.2.1.36	SAE bearing identification value only is present in the SAE carrying list information unit that is released the data forwarding resource (a value for SAE bearer identity shall only be present once in SAE Bearer To Be Released Data Forwarding Resource List IE)	Be (YES)	Ignore (ignore)	??eNB?UE?S1AP?ID	Compulsory (M)	??9.2.3.4	Be (YES)	Refusal (reject)

In the present embodiment step 1112, target BS discharge corresponding with the user, be used for the resource of data forwarding after, send the resource response information that discharges to MME.Send mode corresponding to second indication information in the step 1111, target BS sends the mode that discharges resource response information to MME and also can comprise: add release resource response indication information unit in existing message, for example: target BS adds release resource response indication information unit in discharging the resource response informational message, send the resource that carries release resource response indication information unit to MME and discharge response message, be used to notify MME data forwarding resource to delete.Perhaps, adopt predefined new information to send and discharge resource response information, for example: will discharge resource response information and send, and be used to notify MME data forwarding resource to delete as predefined new information (as: deleted data forwarding resource response message).

When present embodiment switched to objective network when user plane bearer, MME can start timer, discharged constantly by the target network node of timer supervisory user equipment and the resource of source network node; When timer expiry, the release respective resources of indicating target network node and source network node, thus save target network resource and source network node resource; Present embodiment can be done a spot of improvement on the basis of existing technology and can realize, has reduced complexity, has improved flexibility of resource release simultaneously.

Figure 12 is another method for releasing resource the 3rd embodiment signaling diagram of the present invention.The difference of present embodiment and embodiment shown in Figure 11 is, the UE that present embodiment is in connection status enters into the control area of target BS from the source base station control area, ME changes with the subscriber equipment corresponding M, and variation has also taken place in S-GW, and promptly the source gateway is that different gateways, source mobile management network element and target mobility management network element also are different mobile management network elements with the destination service gateway.Present embodiment need carry out the switching of S1 interface control information and transmission data, thereby comprising with the corresponding resource of subscriber equipment of needing to discharge switching is finished after:, the resource that be used for data forwarding corresponding of target BS and destination service gateway and source base station and source gateway with subscriber equipment with subscriber equipment accordingly, the resource of the transfer of data that is useful on.

The handoff procedure of S1 interface control information and transmission data comprises: stages three part is finished in handoff preparation phase, handover execution stage and switching.In handoff preparation phase, network is that UE sets up the path (comprising direct forwarding and situation about transmitting indirectly) of carrying out data forwarding.If the mode of data forwarding is directly to transmit, then the path of data forwarding is: from the source base station to the target BS; Having only target BS is the resource that user equipment allocation is used for the up-downgoing data forwarding.If the mode of data forwarding is to transmit indirectly, then the path of data forwarding is: arrive target BS at last through the destination service gateway again from source base station to the source gateway; Target BS, source gateway and destination service gateway are the resource that user equipment allocation is used for the up-downgoing data forwarding, as are used for address information TEID of data forwarding etc.In handover execution stage, source base station passes through the path of data forwarding to target BS forwarding uplink data or downlink data.

When handoff preparation phase and handover execution stage were all finished, operation was switched and is finished the flow process in stage.The handoff procedure of S1 interface control information and transmission data is shown in step 121-step 1216.

Step 121, target BS send switching notice to target mobility management network element.

Step 122, target mobility management network element send the reorientation end notification to the source mobile management network element.

Step 123, source mobile management network element start timer when receiving the reorientation end notification of target mobility management network element transmission.

This timer not only is used for the resource of monitor source mobile management network element on the gateway of source and discharges constantly, and the respective resources that is used for simultaneously on the monitoring objective network node discharges constantly.If the data forwarding mode is direct pass-through mode, then this timer is used for the respective resources release moment on the monitoring objective base station; If the data forwarding mode is indirect pass-through mode, then this timer is used for the respective resources release moment on monitoring objective base station, source gateway and the destination service gateway.

Step 124, source mobile management network element send reorientation to target mobility management network element and finish response.

Step 125, target mobility management network element send more new bearer request to the destination service gateway.

Step 126, destination service gateway send more new bearer request to P-GW.

Step 127, P-GW send more new bearer response to the destination service gateway.

Step 128, destination service gateway send more new bearer response to target mobility management network element.

When timer expiry that step 123 starts, the source mobile management network element is initiated source network node (comprising source gateway and source base station) and target network node (comprises target BS, perhaps comprise target BS and destination service gateway) respective resources discharge flow process, shown in step 129-step 1216.

Wherein step 129-step 1211 is for when the timer expiry that step 123 starts, the flow process of source network node resource release.

Step 129, source mobile management network element send resource release request to source base station, are used for the notification source base station and discharge and the corresponding resource of subscriber equipment.

Step 1210, source mobile management network element send the deleting bearing request to the source gateway, are used for deletion of notification source gateway and subscriber equipment corresponding bearer resource.

Step 1211, after the source gateway discharges respective resources, send the resource response information that discharges to the source mobile management network element.

Step 1212-step 1216 is when the timer expiry that step 123 starts, the flow process that the target network node resource discharges.

Step 1212, source mobile management network element send data forwarding to target mobility management network element and finish indication.This data forwarding is finished indication and is used to trigger target mobility management network element, and to target BS, or target BS and destination service gateway send second indication information; This second indication information is used to indicate described destination service gateway or target BS to discharge and the corresponding resource of described subscriber equipment.Concrete, this second indication information can comprise resource release request or deleting bearing request.

Step 1213, target mobility management network element send second indication information to target BS, are used for the notification target base station and discharge corresponding with subscriber equipment, as to be used for data forwarding resource.

Step 1214, target BS send the resource response information that discharges to target mobility management network element after discharging respective resources.

If the data forwarding mode is indirect pass-through mode, also can comprise the respective resources that discharges on the destination service gateway.

Step 1215, target mobility management network element send second indication information to the destination service gateway, are used for the resource that the deletion of notification target gateway is corresponding with subscriber equipment, be used for data forwarding.

Step 1216, after the destination service gateway discharges respective resources, send the resource response information that discharges to target mobility management network element.

In the present embodiment, the sequential relationship between step 129 and the step 1212 is unrestricted, and the two does not have inevitable sequential relationship; There is not inevitable sequential relationship between step 129 and the step 1210 yet; In addition, there is not inevitable sequential relationship between step 1213 and the step 1215 yet.

In the present embodiment step 1213, target mobility management network element is very flexible to the mode that target BS sends second indication information, concrete mode can repeat no more referring to the record of the present invention another method for releasing resource second embodiment step 1111a and step 1111b.

In the present embodiment step 1214, target BS discharge corresponding with the user, be used for the resource of data forwarding after, send the resource response information that discharges to target mobility management network element, discharge the send mode of resource response information, can repeat no more referring to the record of another method for releasing resource second embodiment step 1112 of the present invention.

In the present embodiment step 1215, target mobility management network element is also very flexible to the mode that the destination service gateway sends second indication information, for example: second indication information is added in the existing message, sends as an indication information unit in the existing message; Perhaps, second indication information is sent as predefined new information, or the like.

Second indication information can be used as an indication information unit in the existing message, as: this indication information unit is for discharging data forwarding resource indication information unit (Release Data Forwarding ResourceIndicator), be used to indicate the destination service gateway to discharge corresponding with subscriber equipment, as to be used for data forwarding resource, at this moment, step 1215 is step 1215a:

Step 1215a, MME add release data forwarding resource indication information unit in the deleting bearing request message, send to the destination service gateway and carry the deleting bearing request message that discharges data forwarding resource indication information unit.

Table 4 is deleting bearing request message embodiment one of the present invention.As shown in table 4, can in the mutual existing deleting bearing request message of MME and destination service gateway, add a new indication information unit: discharge data forwarding resource indication information unit (Release Data Forwarding Resource Indicator), be used to indicate the destination service gateway to discharge corresponding with subscriber equipment, as to be used for data forwarding resource.The destination service gateway discharges corresponding with subscriber equipment, as to be used for data forwarding resource when receiving the deleting bearing request message that carries release data forwarding resource indication information unit.

Table 4 is deleting bearing request message embodiment one of the present invention

Information word (Information elements)	State (P)	Conditioned disjunction note (Condition/Comment)	Need to understand (CR)	Type of information element (IE Type)
Information word (Information elements)	State (P)	Conditioned disjunction note (Condition/Comment)	Need to understand (CR)	Type of information element (IE Type)	EPS bearing identification (EPS Bearer ID (EBI))	(C) with good conditionsi	If the attachment removal flow process of asking corresponding P-GW to initiate its objective is dedicated bearer of deexcitation, this IE comprises is the carrying that need be deleted by SGW.(If the request corresponds to P_GW initiated detach procedure to deactivate a dedicated bearer, this IE contains the bearer (s) that shall be torn down by the SGW)	1	EPS bearing identification (EBI)
The EPS bearing identification (Linked EPS Bearer ID (LBI)) that connects	(C) with good conditionsi	If the attachment removal flow process of asking corresponding P-GW to initiate its objective is deexcitation and belongs to whole carryings that a PDN connects that this IE will comprise that disconnecting the default bearing that is associated with this PDN indicates.(If the request corresponds to P-GW initiated detach procedure to deactivate all bearers belonging to a PDN connection, then this IE shall be included to indicate the default bearer associated with the PDN being disconnected.) if ask the attachment removal flow process of corresponding MME initiation, this IE will not exist.(If the request corresponds to a MME initiated detach procedure, this IE shall not be present.)	1	EPS bearing identification (EBI)	EPS bearing identification (EPS Bearer ID (EBI))	(C) with good conditionsi		1	EPS bearing identification (EBI)
	(C) with good conditionsi		1	EPS bearing identification (EBI)	Flow processing sign (Procedure Transaction Id (PTI))	(C) with good conditionsi	If the bearing resource of request corresponding UE request discharges flow process, this IE will be comprised.(If the request corresponds to UE requested bearer resource release procedure for an E-UTRAN, this IE shall be included.)	1	Flow processing sign (PTI)
Operation indication (Operation indication)	(C) with good conditionsi	If this IE is comprised that this message will be sent to MME so.(If this IE is included then the message shall be forwarded to the MME.)	1	Operation indication (Operation indication)	Flow processing sign (Procedure Transaction Id (PTI))	(C) with good conditionsi		1	Flow processing sign (PTI)
Operation indication (Operation indication)	(C) with good conditionsi		1	Operation indication (Operation indication)	Discharge data forwarding resource indication (Release Data Forwarding Resource Indicator)	Selectable (O)	This IE is used to indicate receiving node to discharge the data forwarding resource.(This IE is used to indicate the receiver to re lease the data forwarding resource.)	0	Discharge data forwarding resource indication (Release data forwarding resource indicator)
Privately owned expansion (Private Extension)	Selectable (O)	Do not have (None)	0	Privately owned expansion (Private Extension)		Selectable (O)		0

Second indication information also can be used as predefined new information and sends, for example: this new information is that deleted data is transmitted resource request message, be used to indicate the destination service gateway to discharge corresponding with subscriber equipment, as to be used for data forwarding resource, at this moment, step 1215 is step 1215b:

Step 1215b, MME send deleted data to the destination service gateway and transmit resource request message, are used to indicate the destination service gateway to discharge corresponding with subscriber equipment, as to be used for data forwarding resource.It is as shown in table 5 that deleted data is transmitted resource request message form embodiment.

Table 5 is transmitted resource request message embodiment two for deleted data of the present invention

Information word (Information elements)	State (P)	Conditioned disjunction note (Condition/Comment)	Need to understand (CR)	Type of information element (IE Type)
Information word (Information elements)	State (P)	Conditioned disjunction note (Condition/Comment)	Need to understand (CR)	Type of information element (IE Type)	EPS bearing identification (EPS Bearer ID (EBI))	Compulsory (M)	Do not have (None)	??0	EPS bearing identification (EBI)
Privately owned expansion (Private Extension)	Selectable (O)	Do not have (None)	??0	Privately owned expansion (Private Extension)	EPS bearing identification (EPS Bearer ID (EBI))	Compulsory (M)	Do not have (None)	??0	EPS bearing identification (EBI)

In the present embodiment step 1216, the destination service gateway discharge corresponding with the user, be used for the resource of data forwarding after, send the resource response information that discharges to target mobility management network element.Send mode corresponding to second indication information in the step 1215, the destination service gateway sends the mode that discharges resource response information to target mobility management network element and also can comprise: add release resource response indication information unit in existing message, for example: the destination service gateway adds release resource response indication information unit in discharging the resource response informational message, send the release resource response informational message that carries release resource response indication information unit to target mobility management network element, be used for notification target mobile management network element data forwarding resource and delete.Perhaps, adopt predefined new information to send and discharge resource response information, for example: pre-defined deleted data is transmitted resource response message, is used for target mobility management network element data forwarding resource and deletes.

Present embodiment provides in the handoff procedure of S1 interface control information and transmission data, switches the source network node in the stage of finishing and the new method that the target network node respective resources discharges.When user plane bearer switched to objective network, the source mobile management network element can start timer, and the resource of the target network node of supervisory user equipment and source network node discharges constantly simultaneously; When timer expiry, the release respective resources of source mobile management network element indication source network node, and notification target mobile management network element data forwarding is finished, discharge respective resources by target mobility management network element indicating target network node, thereby save target network resource and source network node resource; Present embodiment can be done a spot of improvement on the basis of existing technology and can realize, has reduced complexity, has improved flexibility of resource release simultaneously.

Figure 13 is a kind of mobile management network element example structure of the present invention schematic diagram.As shown in figure 13, present embodiment comprises that the time block 131 and first resource discharge indicating module 132.

Time block 131 is used for when user plane bearer switches to objective network, starts timer; The resource that described timer is used to monitor the target network node of described subscriber equipment discharges constantly.

First resource release indicating module 132 is used for sending first indication information to target network node when the timer expiry of time block 131 startups; Described first indication information is used to indicate described target network node to discharge and the corresponding resource of described subscriber equipment.

On the basis of technique scheme, mobile management network element also cocoa comprises: data forwarding is finished indicating module 133.

When this data forwarding is finished the timer expiry that indicating module 133 is used for starting when time block 131, send data forwarding to target mobility management network element and finish indication; Described data forwarding is finished indication and is used to trigger described target mobility management network element, sends second indication information to destination service gateway or target BS; Described second indication information is used to indicate described destination service gateway or target BS to discharge and the corresponding resource of described subscriber equipment.

In addition, the timer that starts of time block 131 resource that also can be used for monitoring the source network node of described subscriber equipment discharges constantly.Accordingly, first resource release indicating module 132 also can be used for sending first indication information to described source network node when timer expiry; At this moment, first indication information also is used to indicate described source network node to discharge and the corresponding resource of described subscriber equipment.

In the mobile management network element that the embodiment of the invention provides, when user plane bearer switches to objective network, start timer by time block, the resource that is used for the target network node of supervisory user equipment discharges constantly; When timer expiry, discharge the release respective resources of indicating module indicating target network node by first resource, thereby save target network resource, improved flexibility of resource release.The mutual workflow of mobile management network element embodiment of the present invention and other network elements can repeat no more referring to the record of the corresponding embodiment of Figure 11 and Figure 12.

Figure 14 is another mobile management network element example structure schematic diagram of the present invention.As shown in figure 14, present embodiment comprises that the 5th receiver module 141 and second resource discharge indicating module 142.

The 5th receiver module 141 is used to receive data forwarding and finishes indication.

Second resource discharges indicating module 142 and is used for finishing when indicating when the 5th receiver module 141 receives described data forwarding, destination service gateway or target BS to subscriber equipment send second indication information, and described second indication information is used to indicate described destination service gateway or target BS to discharge and the corresponding resource of described subscriber equipment.

On the basis of technique scheme, when second indication information was release data forwarding resource indication information unit, second resource discharged indicating module 142 and comprises that the first encapsulation transmitting element 1421 and second encapsulates transmitting element 1422.

The first encapsulation transmitting element 1421 is used for adding described release data forwarding resource indication information unit at the deleting bearing request message, sends the deleting bearing request message that carries described release data forwarding resource indication information unit to described destination service gateway.

The second encapsulation transmitting element 1422 adds described release data forwarding resource indication information unit in resource release request message, carry the resource release request message of described release data forwarding resource indication information unit to described target BS transmission.

On the basis of technique scheme, when second indication information was deleted data forwarding resource request message, second resource discharged indicating module 142 and comprises: the 3rd encapsulation transmitting element 1423.

The 3rd encapsulation transmitting element 1423 is used for sending described deleted data forwarding resource request message to described destination service gateway or target BS.

In another mobile management network element that the embodiment of the invention provides, finish when indication when receiving with the corresponding data forwarding of subscriber equipment, discharge indicating module indicating target gateway or target BS release respective resources by second resource, thereby the saving target network resource has improved flexibility of resource release.The mutual workflow of another mobile management network element of the present invention embodiment and other network elements can repeat no more referring to the record of the corresponding embodiment of Figure 12.

Figure 15 is the another base station of a present invention example structure schematic diagram.As shown in figure 15, present embodiment comprises the 6th receiver module 151 and the 4th resource release module 152.

The 6th receiver module 151 is used to receive second indication information that the target mobility management network element of subscriber equipment sends, and described second indication information is used to indicate described base station to discharge and the corresponding resource of described subscriber equipment.

The 4th resource release module 152 is used for discharging and the corresponding resource of described subscriber equipment when described the 6th receiver module 151 receives described second indication information.

Present embodiment discharges and the corresponding resource of subscriber equipment by the resource release module, thereby saves target network resource when second indication information that the target mobility management network element that receives subscriber equipment sends, has improved flexibility of resource release.The mutual workflow of the another base station embodiment of the present invention and other network elements can repeat no more referring to the record of the corresponding embodiment of Figure 11 and Figure 12.

Figure 16 is the another gateway example structure of a present invention schematic diagram.As shown in figure 16, present embodiment comprises the 7th receiver module 161 and the 5th resource release module 162.

The 7th receiver module 161 is used to receive second indication information that the target mobility management network element of subscriber equipment sends, and described second indication information is used to indicate described gateway to discharge and the corresponding resource of described subscriber equipment.

The 5th resource release module 162 is used for discharging and the corresponding resource of described subscriber equipment when described the 7th receiver module 161 receives described second indication information.

Present embodiment discharges and the corresponding resource of subscriber equipment by the resource release module, thereby saves target network resource when second indication information that the target mobility management network element that receives subscriber equipment sends, has improved flexibility of resource release.The mutual workflow of the another gateway embodiment of the present invention and other network elements can repeat no more referring to the record of the corresponding embodiment of Figure 11 and Figure 12.

Figure 17 is another resource delivery system example structure schematic diagram of the present invention.As shown in figure 17, present embodiment comprises source mobile management network element 171 and target network node 172.

Source mobile management network element 171 is used for when user plane bearer switches to objective network, starts timer; The resource that described timer is used to monitor the target network node of described subscriber equipment discharges constantly; When described timer expiry, send first indication information to target network node; Described first indication information is used to indicate described target network node to discharge and the corresponding resource of described subscriber equipment.

Target network node 172 is used for discharging and the corresponding resource of described subscriber equipment when receiving described first indication information.Wherein, target network node 172 can comprise target BS or destination service gateway.

Present embodiment when user plane bearer switches to objective network, starts timer by the source mobile management network element, and the resource of the target network node by timer supervisory user equipment discharges constantly; When timer expiry, target network node discharges respective resources according to the indication that the source mobile management network element issues, thereby saves target network resource, has improved flexibility of resource release.Among another resource delivery system of the present invention embodiment, the mutual workflow of each network element can be referring to the record of the embodiment of Figure 11 and Figure 12 correspondence; Each network element refined structure embodiment can repeat no more referring to the record of the embodiment of Figure 13-16 correspondence.

One of ordinary skill in the art will appreciate that: accompanying drawing is the schematic diagram of a preferred embodiment, and module in the accompanying drawing or flow process might not be that enforcement the present invention is necessary.

One of ordinary skill in the art will appreciate that: the module in the device among the embodiment can be described according to embodiment and be distributed in the device of embodiment, also can carry out respective change and be arranged in the one or more devices that are different from present embodiment.The module of the foregoing description can be merged into a module because of the facility of making, and also can further split into a plurality of submodules or unit because of the needs of design or layout.

The invention described above embodiment sequence number is not represented the quality of embodiment just to description.

One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can be finished by the relevant hardware of program command, aforesaid program can be stored in the computer read/write memory medium, this program is carried out the step that comprises said method embodiment when carrying out; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CD.

It should be noted that at last: above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that previous embodiment is put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of embodiment of the invention technical scheme.

Claims

1, a kind of method for releasing resource is characterized in that, comprising:

2, method for releasing resource according to claim 1 is characterized in that, the destination service gateway of described objective network is identical with the source gateway; Whether described judgment data forwarding also comprises before finishing:

First identification information that the reception sources gateway sends; Described first identification information is used for expression and has switched to objective network with the corresponding user plane bearer of described subscriber equipment.

3, method for releasing resource according to claim 1 is characterized in that, the destination service gateway of described objective network is different with the source gateway; Whether described judgment data forwarding also comprises before finishing:

First identification information that receiving block data net gateway sends through described source gateway; Described first identification information is used for expression and has switched to objective network with the corresponding user plane bearer of described subscriber equipment.

4, method for releasing resource according to claim 3 is characterized in that, after the corresponding resource of described release and subscriber equipment, also comprises:

Send carrying to mobile management network element and discharge request;

Described mobile management network element discharges request according to described bearing resource, sends the deleting bearing request to described source gateway;

Described source gateway discharges and the corresponding resource of described subscriber equipment according to described deleting bearing request.

5, method for releasing resource according to claim 3 is characterized in that, described source gateway also comprises after receiving described identification information:

Described source gateway is to the described identification information of described destination service gateway forwards;

Described destination service gateway discharges and the corresponding resource of described subscriber equipment according to described identification information.

6, method for releasing resource according to claim 5 is characterized in that, after described destination service gateway release and the corresponding resource of described subscriber equipment, also comprises:

Described destination service gateway sends described identification information to described target BS;

Described target BS discharges and the corresponding resource of described subscriber equipment according to described identification information.

According to the described arbitrary method for releasing resource of claim 1-6, it is characterized in that 7, the corresponding resource of described release and subscriber equipment comprises:

Discharge and the corresponding resource of described subscriber equipment immediately; Perhaps

Start timer, when timer expiry, discharge and the corresponding resource of described subscriber equipment.

8, method for releasing resource according to claim 7 is characterized in that, the resource that the target BS of described objective network or destination service gateway discharge is: corresponding with described subscriber equipment, as to be used for data forwarding resource.

9, method for releasing resource according to claim 1 is characterized in that, described identification information comprises second identification information, the 3rd identification information or the 4th identification information; Described to target BS or source gateway transmission identification information, comprising:

All transmit when finishing when upstream data and downlink data, send second identification information to described target BS or source gateway; Described second identification information is used to represent that upstream data and downlink data have all been transmitted finishes;

When the upstream data forwarding is finished, send the 3rd identification information to described target BS or source gateway; Described the 3rd identification information is used to represent that upstream data has been transmitted finishes;

When the downlink data forwarding is finished, send the 4th identification information to described target BS or source gateway; Described the 4th identification information is used to represent that downlink data has been transmitted finishes.

10, method for releasing resource according to claim 9, it is characterized in that, described target BS, source gateway or destination service gateway are when receiving described second identification information, the 3rd identification information or the 4th identification information, and release comprises with the corresponding resource of subscriber equipment:

When receiving described second identification information, discharge and corresponding ascending resource of described subscriber equipment and downlink resource;

When receiving described the 3rd identification information, discharge and the corresponding ascending resource of described subscriber equipment;

When receiving described the 4th identification information, discharge and described subscriber equipment corresponding downstream resource.

11, a kind of base station is characterized in that, comprising:

12, base station according to claim 11 is characterized in that, also comprises:

First receiver module is used for first identification information that the reception sources gateway sends, and activates described judge module; Described first identification information is used for expression and has switched to objective network with the corresponding user plane bearer of described subscriber equipment.

13, base station according to claim 11 is characterized in that, also comprises:

First request sending module is used for sending carrying release to mobile management network element and asking after described first resource release module release and the corresponding resource of subscriber equipment.

14, base station according to claim 11 is characterized in that, the described first resource release module comprises:

First releasing unit immediately when being used for data forwarding and finishing, discharges and the corresponding resource of described subscriber equipment immediately; Perhaps

First releasing unit regularly when being used for data forwarding and finishing, starts timer, when timer expiry, discharges and the corresponding resource of described subscriber equipment.

15, base station according to claim 11 is characterized in that, described identification information sending module comprises:

The second identification information transmitting element is used for all transmitting when finishing when upstream data and downlink data, sends second identification information to described target BS or source gateway; Described second identification information is used to represent that upstream data and downlink data have all been transmitted finishes; Perhaps

The 3rd identification information transmitting element is used for sending the 3rd identification information to described target BS or source gateway when the upstream data forwarding is finished; Described the 3rd identification information is used to represent that upstream data has been transmitted finishes;

The 4th identification information transmitting element is used for sending the 4th identification information to described target BS or source gateway when the downlink data forwarding is finished; Described the 4th identification information is used to represent that downlink data has been transmitted finishes.

16, a kind of base station is characterized in that, comprising:

17, base station according to claim 16 is characterized in that, the described second resource release module comprises:

Second releasing unit immediately is used for when described the 3rd receiver module receives described identification information, discharges and the corresponding resource of described subscriber equipment immediately; Perhaps

The second timing releasing unit is used for when described the 3rd receiver module receives described identification information, starts timer, when timer expiry, discharges and the corresponding resource of described subscriber equipment.

18, base station according to claim 17 is characterized in that, described identification information comprises second identification information, the 3rd identification information or the 4th identification information; The described second resource release module comprises:

The first data forwarding resource releasing unit is used for discharging and corresponding ascending resource of described subscriber equipment and downlink resource when receiving described second identification information; Described second identification information is used to represent that described source base station upstream data and downlink data have all been transmitted finishes; Perhaps

The first ascending resource releasing unit is used for discharging and the corresponding ascending resource of described subscriber equipment when receiving described the 3rd identification information; Described the 3rd identification information is used to represent that upstream data has been transmitted finishes;

The first downlink resource releasing unit is used for discharging and described subscriber equipment corresponding downstream resource when receiving described the 4th identification information; Described the 4th identification information is used to represent that downlink data has been transmitted finishes.

19, base station according to claim 16 is characterized in that, also comprises:

Second request sending module is used for sending carrying release to mobile management network element and asking after described second resource release module release and the corresponding resource of subscriber equipment.

20, a kind of gateway is characterized in that, comprising:

21, gateway according to claim 20 is characterized in that, described information resources release module comprises:

The 3rd releasing unit immediately is used for when described the 4th receiver module receives described identification information, discharges and the corresponding resource of described subscriber equipment immediately; Perhaps

The 3rd timing releasing unit is used for when described the 4th receiver module receives described identification information, starts timer, when timer expiry, discharges and the corresponding resource of described subscriber equipment.

22, gateway according to claim 20 is characterized in that, also comprises:

Forwarding module is used for transmitting described identification information to destination service gateway or target BS.

23, gateway according to claim 20 is characterized in that, described identification information comprises second identification information, the 3rd identification information or the 4th identification information; Described information resources release module comprises:

Second transmits the data resource releasing unit, is used for discharging and corresponding ascending resource of described subscriber equipment and downlink resource when receiving described second identification information; Described second identification information is used to represent that described source base station upstream data and downlink data have all been transmitted finishes; Perhaps

The second ascending resource releasing unit is used for discharging and the corresponding ascending resource of described subscriber equipment when receiving described the 3rd identification information; Described the 3rd identification information is used to represent that upstream data has been transmitted finishes;

The second downlink resource releasing unit is used for discharging and described subscriber equipment corresponding downstream resource when receiving described the 4th identification information; Described the 4th identification information is used to represent that downlink data has been transmitted finishes.

24, a kind of resource delivery system is characterized in that, comprising:

25, resource delivery system according to claim 24 is characterized in that, also comprises mobile management network element;

Described source base station also is used for after release and the corresponding resource of described subscriber equipment, sends carrying release to described mobile management network element and asks;

Described mobile management network element is used to receive described carrying and discharges request, sends the deleting bearing request to described source gateway;

Described source gateway also is used for according to described deleting bearing request, discharges and the corresponding resource of described subscriber equipment.

26, resource delivery system according to claim 24 is characterized in that, also comprises the destination service gateway;

Described source gateway also is used for to the described identification information of described destination service gateway forwards;

Described destination service gateway is used for discharging and the corresponding resource of described subscriber equipment according to the described identification information that receives.

27, resource delivery system according to claim 26 is characterized in that, described destination service gateway also is used for transmitting described identification information to described target BS.

28, a kind of method for releasing resource is characterized in that, comprising:

29, method for releasing resource according to claim 28 is characterized in that, described target network node comprises target mobility management network element, destination service gateway and/or target BS, and described first indication information comprises second indication information; Described when described timer expiry, send first indication information to target network node, comprising:

When described timer expiry, send data forwarding to target mobility management network element and finish indication; Described data forwarding is finished indication and is used to trigger described target mobility management network element, sends second indication information to destination service gateway or target BS; Described second indication information is used to indicate described destination service gateway or target BS to discharge and the corresponding resource of described subscriber equipment.

30, method for releasing resource according to claim 29 is characterized in that, and is described after target mobility management network element transmission data forwarding is finished indication, also comprises:

Described target mobility management network element is finished indication according to described data forwarding, sends second indication information to described destination service gateway or target BS;

Described destination service gateway or target BS discharge and the corresponding resource of described subscriber equipment according to described second indication information.

31, method for releasing resource according to claim 29 is characterized in that, described second indication information is for discharging data forwarding resource indication information unit;

Described target mobility management network element sends described second indication information to described destination service gateway, comprise: described target mobility management network element is added described release data forwarding resource indication information unit in the deleting bearing request message, sends the deleting bearing request message that carries described release data forwarding resource indication information unit to described destination service gateway;

Described target mobility management network element sends described second indication information to described target BS, comprise: described target mobility management network element is added described release data forwarding resource indication information unit in resource release request message, sends the resource release request message that carries described release data forwarding resource indication information unit to described target BS.

32, method for releasing resource according to claim 29 is characterized in that, described second indication information is that deleted data is transmitted resource request message; Described target mobility management network element sends described second indication information to described destination service gateway or target BS, comprising:

Described target mobility management network element sends described deleted data forwarding resource request message to described destination service gateway or target BS.

33, a kind of mobile management network element is characterized in that, comprising:

34, mobile management network element according to claim 33, it is characterized in that, comprise target mobility management network element, destination service gateway and/or target BS at described target network node, when described first indication information comprised second indication information, described mobile management network element also comprised:

Data forwarding is finished indicating module, is used for when described timer expiry, sends data forwarding to target mobility management network element and finishes indication; Described data forwarding is finished indication and is used to trigger described target mobility management network element, sends second indication information to destination service gateway or target BS; Described second indication information is used to indicate described destination service gateway or target BS to discharge and the corresponding resource of described subscriber equipment.

35, a kind of mobile management network element is characterized in that, comprising:

36, mobile management network element according to claim 35 is characterized in that,

At described second indication information is that described second resource discharges indicating module and comprises when discharging data forwarding resource indication information unit:

The first encapsulation transmitting element is used for adding described release data forwarding resource indication information unit at the deleting bearing request message, sends the deleting bearing request message that carries described release data forwarding resource indication information unit to described destination service gateway;

The second encapsulation transmitting element adds described release data forwarding resource indication information unit in resource release request message, send the resource release request message that carries described release data forwarding resource indication information unit to described target BS;

When described second indication information was deleted data forwarding resource request message, described second resource discharged indicating module and comprises:

The 3rd encapsulation transmitting element is used for sending described deleted data forwarding resource request message to described destination service gateway or target BS.

37, a kind of base station is characterized in that, comprising:

38, a kind of gateway is characterized in that, comprising:

39, a kind of resource delivery system is characterized in that, comprising:

The source mobile management network element is used for when user plane bearer switches to objective network, starts timer; The resource that described timer is used for the target network node of supervisory user equipment discharges constantly; When described timer expiry, send first indication information to target network node; Described first indication information is used to indicate described target network node to discharge and the corresponding resource of described subscriber equipment;