CN102056145A - Method and system for releasing tunnel connection in communication system supporting local IP access - Google Patents
Method and system for releasing tunnel connection in communication system supporting local IP access Download PDFInfo
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- CN102056145A CN102056145A CN2009102091381A CN200910209138A CN102056145A CN 102056145 A CN102056145 A CN 102056145A CN 2009102091381 A CN2009102091381 A CN 2009102091381A CN 200910209138 A CN200910209138 A CN 200910209138A CN 102056145 A CN102056145 A CN 102056145A
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Abstract
The invention discloses a method for releasing tunnel connection in a communication system supporting local IP access, comprising the following steps: in a service request or tracking area updating process, a mobility management entity (MME) sends a release message of local IP access connection to a core network service gateway, and the core network service gateway releases the message of local IP access connection based on the release message. The invention also discloses a system for realizing the method. When a user terminal has services or the tracking area needs to be updated, the direct tunnel of LIPA (local IP access) is reconstructed, at the moment, the MME sends the release message for releasing the LIPA connection message to the core network service gateway, and the core network service gateway releases the LIPA connection message, thus ensuring timely release of invalid messages on the core network service gateway, and ensuring the efficiency of the core network service gateway for processing network side data.
Description
Technical field
The present invention relates to discharge when the user terminal local IP access adopts direct tunnel style the technology in indirect tunnel, relate in particular to the tunnel connects in a kind of communication system of supporting local IP access method for releasing and system.
Background technology
Third generation partner program (3GPP, 3rd Generation Partnership Project) grouping system (EPS of evolution, Evolved Packet System) by the universal mobile telecommunications system land radio access web (E-UTRAN of evolution, Evolved Universal Terrestrial Radio Access Network), mobile management unit (MME, Mobility Management Entity), gateway (S-GW, ServingGateway), grouped data network gateway (P-GW or PDN GW, Packet Data NetworkGateway), home subscriber server (HSS, Home Subscriber Server), authentication and authorization charging (the AAA of 3GPP, Authentication, Authorization and Accounting) server, "Policy and Charging Rules Function (PCRF, Policy and Charging Rules Function) entity and other support nodes are formed.Fig. 1 a is the schematic diagram of mobile communications network connected mode one in the prior art, as shown in Figure 1a, shown Mobility Management Entity is responsible for the related work of chains of command such as the processing of mobile management, Non-Access Stratum signaling and the contextual management of user's mobile management; S-GW is the accessing gateway equipment that links to each other with E-UTRAN, transmits data between E-UTRAN and P-GW, and is responsible for pending datas such as paging are carried out buffer memory; P-GW then is the borde gateway of EPS and packet data network (PDN, Packet Data Network) network, and the access of being responsible for PDN reaches functions such as transmitting data between EPS and PDN; S-GW and P-GW belong to the core net gateway.
Base station from home is a kind of small-sized, lower powered base station, be deployed in indoor places such as family and office, main effect is in order higher service rate to be provided to the user and to reduce and use the needed expense of high rate services, remedying the deficiency that existing distributed cellular radio communication system covers simultaneously.The advantage of base station from home is economical, convenient, low-power output, plug and play etc.In the family expenses base station system, base station from home is the wireless side network element.Base station from home can be directly connected to core network, as shown in Figure 1a, also can be linked into core network by this logical ne of home base-station gateway.Fig. 1 b is the schematic diagram of mobile communications network connected mode two in the prior art, shown in Fig. 1 b, the network architecture shown in the network architecture shown in it and Fig. 1 a is basic identical, home base-station gateway major function wherein is: the fail safe of checking base station from home, handle the registration of base station from home, base station from home is carried out operation maintenance management,, be responsible for the data of exchcange core net and base station from home according to Carrier Requirements configuration and control base station from home.
Except the access of supporting mobile core network, mobile communication system (comprising the base station from home system) also can be supported local IP access (LIPA, Local IP Access) function can realize that user terminal inserts this locality of other IP devices of home network or other IP devices of enterprise network or internet.
In order to realize the local IP access function, set up local gateway, Fig. 2 is the schematic diagram of mobile communications network connected mode three in the prior art, Fig. 3 a is the schematic diagram of mobile communications network connected mode four in the prior art, Fig. 3 b is the schematic diagram of mobile communications network connected mode five in the prior art, Fig. 4 is the schematic diagram of mobile communications network connected mode six in the prior art, as Fig. 2, Fig. 3 a, Fig. 3 b, shown in Figure 4, setting up that local access network closes can provide providing powerful support for the local IP access technology.As shown in Figure 2, local gateway can and the wireless side network element close and establish or near the wireless side network element (promptly external), as Fig. 3 a, Fig. 3 b, shown in Figure 4, under the situation that has home base-station gateway, local gateway not only can close with base station from home and establish or be in (promptly external) near the base station, also can and home base-station gateway close and establish or be in (promptly external) near the base-station gateway.Local gateway can be local SGW (L-SGW, Local SGW), local L-PGW (L-PGW, Local PGW), virtual SGW (V-SGW, Virtual SGW), virtual PGW (V-PGW, Virtual PSGW), L-GGSN (local GGSN, Local GGSN), external L-GW.
With Long Term Evolution (LTE, Long Term Evolution) the mobile communications network framework is an example, connection for local IP access, in order to realize the quick transmission of data, can adopt the mode in direct tunnel when user terminal is in connected state to it, at this moment, local IP connects the tunnel and closes from user terminal to wireless side network element/home base-station gateway to local access network, transfer of data is without core net, and efficient is higher; When user terminal is in Idle state, for not data cached at local gateway, local IP is connected the tunnel switch to core net, at this moment, local IP connects the tunnel and closes (this tunnel is referred to as indirect tunnel this patent) from user terminal to wireless side network element/home base-station gateway to core net S-GW to local access network, but the downlink data of core net S-GW buffer memory Idle state user terminal wherein.Can transmit data from direct tunnel when user terminal is positioned at connected state, and after user terminal entered Idle state, data can be transmitted from indirect tunnel.This mode is referred to as direct tunnel style, and when adopting this mode to realize local IP access, local gateway is L-PGW, L-GW or L-GGSN.
Local IP connects when direct tunnel is set up can adopt dual mode: mode one when Mobility Management Entity initiation bearing tunnel is set up, is coupled together the tunnel of local gateway and wireless side network element/home base-station gateway by core net S-GW; Mode two directly has Mobility Management Entity to set up the tunnel of local gateway and wireless side network element/home base-station gateway, does not need core net S-GW to participate in.In mode one, need to exist interface between core net S-GW and the local gateway, in mode two, need to exist interface between Mobility Management Entity and the local gateway.The Organization Chart of direct tunnel style such as Fig. 2, Fig. 3 a, Fig. 3 b and shown in Figure 4.When below local gateway is positioned at home base-station gateway when (promptly close) with the wireless side network element position, message between local gateway and Mobility Management Entity or the core net S-GW can be passed through home base-station gateway (as Fig. 3 b), also can be without home base-station gateway (as Fig. 3 a).Fig. 5 a is local IP incoming data stream schematic diagram in the mobile communication system of the present invention, Fig. 5 b inserts another kind of data flow diagram for local IP in the mobile communication system of the present invention, and Fig. 5 a has shown the signal data flow that local IP access is connected with core net in the wireless communication system of Fig. 2, Fig. 3 a, Fig. 3 b and Fig. 4 respectively with Fig. 5 b.Wherein Fig. 5 a is the data flow of employing mode one, and Fig. 5 b is the data flow of employing mode two.
Set up in the process in above-mentioned local IP access connection, when user terminal is idle need be indirect tunnel with direct tunnel conversion, need this moment the S-GW of core net to participate in, and when user terminal reenters connected state, need become direct tunnel again, at this moment, no longer need core net S-GW, and the informational needs deletion that the subscriber's local IP visit that S-GW preserves when idle connects.In the prior art, when entering connected state, can not delete user terminal the information that the IP visit on the S-GW connects, therefore can cause the information on the S-GW to discharge, this may cause the last canned data of S-GW to cause its data-handling efficiency low too much, thereby influences forwarding of data.
Summary of the invention
In view of this, main purpose of the present invention is to provide method for releasing and the system that the tunnel connects in a kind of communication system of supporting local IP access, can set up in direct tunnel and finish the indirect tunnel that back release core net gateway is set up.
For achieving the above object, technical scheme of the present invention is achieved in that
The method for releasing that the tunnel connects in a kind of communication system of supporting local IP access comprises:
Carry out in service request or the tracing section updating process at user terminal, Mobility Management Entity MME sends the release message that local IP access connects to described core net gateway, and described core net gateway discharges the information that described local IP access connects according to described release message.
Preferably, the information of described local IP access connection comprises beared information or contextual information.
Preferably, before service request or tracing section updating, described method also comprises:
When described user terminal enters idle condition or the downlink data arrival of described user terminal is arranged, the local IP access link information that described MME notice core net gateway is preserved described user terminal, and the bearer update of initiating described local IP access connection to local gateway.
Preferably, described wireless side network element comprises Home eNodeB or macro base station or the combination of femto gateway or radio network controller or Home eNodeB and femto gateway or the combination of macro base station and radio network controller.
Preferably, described MME sends the release message that the local IP access of described user terminal connects to described core net gateway, comprising:
When described user terminal has business, send service request to described MME, described MME initiates described user terminal context to described wireless side network element and sets up request;
Described MME is after radio bearer between described wireless side network element and the described user terminal is set up, judge whether described user terminal exists local IP access to connect, initiate bearer update to local gateway when existing, and send the release message that local IP access connects to described core net gateway.
Perhaps, described MME sends the release message that the local IP access of described user terminal connects to described core net gateway, comprising:
Described user terminal is when having business, send service request to described MME, described MME initiates described user terminal context to described wireless side network element and sets up request, and sends the release message that local IP access connects to described core net gateway when set release timer is overtime.
Perhaps, described MME sends the release message that the local IP access of described user terminal connects to described core net gateway, comprising:
Described user terminal regular update tracking area is tabulated or is caused the tracking area tabulation to change because of moving, send the tracing section updating request to described wireless side network element, described wireless side network element is described user terminal selecting MME, and described tracing section updating request is transmitted to described MME, described MME initiates described user terminal context to described wireless side network element and sets up request;
Described MME is after radio bearer between described wireless side network element and the described user terminal is set up, judge whether described user terminal exists local IP access to connect, initiate bearer update to local gateway when existing, and send the release message that local IP access connects to described core net gateway.
Perhaps, described MME sends the release message that the local IP access of described user terminal connects to described core net gateway, comprising:
Described user terminal regular update tracking area is tabulated or is caused the tracking area tabulation to change because of moving, send the tracing section updating request to described wireless side network element, described wireless side network element is described user terminal selecting MME, and described tracing section updating request is transmitted to described MME, described MME initiates described user terminal context to described wireless side network element and sets up request, and sends the release message that local IP access connects to described core net gateway when set release timer is overtime.
The delivery system that the tunnel connects in a kind of communication system of supporting local IP access comprises:
First determining unit is arranged in described MME, is used for whether definite user terminal is current has the tracking area of professional or described user terminal whether to upgrade, and triggers first transmitting element when being;
First transmitting element is used for sending the release message that the local IP access of described user terminal connects to the core net gateway;
Releasing unit is arranged in described core net gateway, is used for discharging according to described release message the information of the local IP access connection of described user terminal.
Preferably, the information of described local IP access connection comprises beared information or contextual information.
Preferably, described system also comprises:
Notification unit is arranged in described MME, is used for notifying described core net gateway when described user terminal enters idle condition or the downlink data arrival of described user terminal is arranged;
Preserve the unit, be arranged in described core net gateway, be used to preserve the local IP access link information of described user terminal;
Bearer update is initiated the unit, is used for initiating the bearer update that described local IP access connects to local gateway.
Preferably, described wireless side network element comprises Home eNodeB or macro base station or the combination of femto gateway or radio network controller or Home eNodeB and femto gateway or the combination of macro base station and radio network controller.
Preferably, described system also comprises:
Second transmitting element is used at described user terminal when business is arranged, and sends service request to described MME;
First initiates the unit, is arranged in described MME, is used for initiating described user terminal context to described wireless side network element and sets up request;
First judging unit is arranged in described MME, is used for after radio bearer between described wireless side network element and the described user terminal is set up, and judges that whether described user terminal exists local IP access to connect, and triggers second and initiates the unit when existing;
Second initiates the unit, is used for initiating bearer update to local gateway, and sends the release message that local IP access connects by described first transmitting element to described core net gateway.
Perhaps, described system also comprises:
The unit is set, is used to be provided with release timer;
Second transmitting element is used at described user terminal when business is arranged, and sends service request to described MME;
The 3rd initiates the unit, is arranged in described MME, is used for initiating described user terminal context to described wireless side network element and sets up request;
Second determining unit is used for determining whether described release timer is overtime, triggers first transmitting element when being and sends the release message that local IP access connects to described core net gateway.
Perhaps, described system also comprises:
The 3rd transmitting element is used for upgrading that the tracking area tabulation cycle arrives or because of described user terminal moves when causing the tracking area tabulation to change, sending the tracing section updating request to described wireless side network element at described user terminal;
First selected cell is arranged in described wireless side network element, is used to described user terminal selecting MME;
First retransmission unit is arranged in described wireless side network element, is used for described tracing section updating request is transmitted to described MME;
The 4th initiates the unit, is arranged in described MME, is used for initiating described user terminal context to described wireless side network element and sets up request;
Second judging unit is arranged in described MME, is used for after radio bearer between described wireless side network element and the described user terminal is set up, and judges that whether described user terminal exists local IP access to connect, and triggers the 5th and initiates the unit when existing;
The 5th initiates the unit, is used for initiating bearer update to local gateway, and sends the release message that local IP access connects by described first transmitting element to described core net gateway.
Perhaps, described system also comprises:
The 4th transmitting element is used for upgrading that the tracking area tabulation cycle arrives or because of described user terminal moves when causing the tracking area tabulation to change, sending the tracing section updating request to described wireless side network element at described user terminal;
Second selected cell is arranged in described wireless side network element, is used to described user terminal selecting MME;
Second retransmission unit is arranged in described wireless side network element, is used for described tracing section updating request is transmitted to described MME;
The 6th initiates the unit, is arranged in described MME, is used for initiating described user terminal context to described wireless side network element and sets up request;
The 3rd determining unit is used for determining whether described release timer is overtime, triggers first transmitting element when being and sends the release message that local IP access connects to described core net gateway.
Among the present invention, when user terminal is in idle condition, the downlink tunnel of the local IP access of described user terminal is transferred to core-network side, promptly set up the tunnel between local gateway and the core net gateway, the data that send to described user terminal will be cached to the core net gateway, be handed down to described user terminal by the core net gateway again.And when user terminal has business or during tracing section updating, the direct tunnel of local IP access rebulids, at this moment, MME will send the release message that discharges the local IP access link information to the core net gateway, the core net gateway will discharge the information that local IP access connects, thereby guaranteed the timely release of invalid information on the core net gateway, guaranteed the efficient of core net gateway processing network side data.
Description of drawings
Fig. 1 a is the schematic diagram of mobile communications network connected mode one in the prior art;
Fig. 1 b is the schematic diagram of mobile communications network connected mode two in the prior art;
Fig. 2 is the schematic diagram of mobile communications network connected mode three in the prior art;
Fig. 3 a is the schematic diagram of mobile communications network connected mode four in the prior art;
Fig. 3 b is the schematic diagram of mobile communications network connected mode five in the prior art;
Fig. 4 is the schematic diagram of mobile communications network connected mode six in the prior art;
Fig. 5 a is local IP incoming data stream schematic diagram in the mobile communication system of the present invention;
Fig. 5 b inserts another kind of data flow diagram for local IP in the mobile communication system of the present invention;
Fig. 6 changes the flow chart in indirect tunnel into for the direct tunnel of LTE system of the present invention;
Fig. 7 is for discharging a kind of flow chart in indirect tunnel in the LTE system business request flow process of the present invention;
Fig. 8 more discharges the another kind of flow chart in indirect tunnel in the new technological process for LTE system keeps track of the present invention district;
Fig. 9 supports the composition structural representation of the delivery system that the tunnel connects in the communication system of local IP access for the present invention.
Embodiment
Basic thought of the present invention is: when user terminal is in idle condition, the downlink tunnel of the local IP access of described user terminal is transferred to core-network side, promptly set up the tunnel between local gateway and the core net gateway, the data that send to described user terminal will be cached to the core net gateway, be handed down to described user terminal by the core net gateway again.And when user terminal has business or during tracing section updating, the direct tunnel of local IP access rebulids, at this moment, MME will send the release message that discharges the local IP access link information to the core net gateway, the core net gateway will discharge the information that local IP access connects, thereby guaranteed the timely release of invalid information on the core net gateway, guaranteed the efficient of core net gateway processing network side data.
For making the purpose, technical solutions and advantages of the present invention clearer, by the following examples and with reference to accompanying drawing, the present invention is described in more detail.
Fig. 6 changes the flow chart in indirect tunnel into for the direct tunnel of LTE system of the present invention, as shown in Figure 6, Fig. 6 is that the present invention is on the basis of Fig. 2 network architecture, (S1 discharges flow process) directly changed the schematic flow sheet in indirect tunnel in tunnel when the LTE system user terminal entered Idle state, and the LTE system changes in direct tunnel indirect tunnel into and may further comprise the steps in this example:
Step 601: when the wireless side network element detects the signaling connection that need discharge user terminal and carries, send user terminal context release request to MME.
Step 602:MME receives that the user terminal context of wireless side network element discharges request, perhaps MME detects when needing connection of the signaling of release user terminal and carrying, MME checks whether user terminal exists local IP access to connect or direct tunnel, when existing, carry out subsequent step, otherwise carry out flow process according to prior art,, do not give unnecessary details because the processing mode of existing procedure and technical solution of the present invention are irrelevant.
Step 603:MME is suitable core net S-GW of user terminal selecting, and to its transmission session foundation request, and carry the local gateway tunnel information that local IP access connects, also carry the operation indication simultaneously, indication core net S-GW goes local gateway to upgrade the tunnel information that local IP access connects.
Step 604: core net S-GW creates context according to the indication of MME for the local IP access connection of user terminal, distributes information such as Tunnel Identifier, preserves the local gateway tunnel information that local IP access connects, and to the request of local gateway transmission bearer update.
Step 605: after local gateway is received the bearer update request message of core net S-GW, upgrade the tunnel information that local IP access connects, the end points in tunnel is changed into core net S-GW by the wireless side network element, the information of deletion wireless side network element, preserve the information of core net S-GW, respond the bearer update response message for core net S-GW.
After step 606: core net S-GW receives the bearer update response message, respond session to MME and set up response message.
Step 607:MME initiates the release command of user terminal context to the wireless side network element.
Step 608: the wireless side network element may be carried out RRC and connect dispose procedure.
Step 609: the wireless side network element is replied the release of user terminal context to MME and is finished.
Adopt above-mentioned flow process, when user terminal entered Idle state, directly the tunnel changed indirect tunnel into, had preserved the tunnel information that local IP access connects on the core net S-GW.
Need to prove, when MME determines that core net receives the downlink data of described user terminal, with the local IP access link information of notifying the core net gateway to preserve described user terminal, and the bearer update of initiating described local IP access connection to local gateway, promptly also can set up indirect tunnel shown in Figure 6, the mode of the foundation in tunnel and shown in Figure 6 to set up mode basic identical, just the condition difference that triggers.
The present invention is directed to the user terminal that above-mentioned indirect tunnel is set up, when user terminal has business or during tracing section updating, the direct tunnel that local IP access connects will be rebulid, at this moment, with the indirect tunnel information of notice core net S-GW deletion local IP access connection, below by concrete example sets forth in detail technical scheme of the present invention.
Fig. 7 as shown in Figure 7, discharges indirect tunnel and may further comprise the steps for discharging a kind of flow chart in indirect tunnel in the LTE system business request flow process of the present invention in this example LTE system business request flow process:
Step 701: be in the user terminal of Idle state, when upstream data need send or need accept downlink data, user terminal sent service request to MME, and concrete, service request is transmitted to MME by the wireless side network element.
Step 702: (this step is optional for NAS, Non-Access-Stratum) verification process to carry out Non-Access Stratum.
Step 703:MME initiates the user terminal context and sets up flow process, sends the user terminal context to the wireless side network element and sets up request.When user terminal had the local IP access connection, MME can be provided with release timer, initiated the release that local IP access connects indirect tunnel to core net S-GW when release timer is overtime.Wherein, before step 703 back and following step 707, all release timer can be set.
Step 704: the wireless side network element is carried out radio bearer and is set up process.
Step 705: the wireless side network element is responded the user terminal context to MME and is set up response.
Step 706:MME upgrades radio bearer and sets up successful IP connection according to the result that sets up of radio bearer.MME judges when user terminal exists local IP access connection or direct tunnel, need initiate the bearer update flow process to local gateway, when local IP access connects direct tunnel and adopts " background technology " described mode one to set up, the bearer update requirements of process is through core net S-GW, when local IP access connected direct tunnel and adopts " background technology " described mode two to set up, the bearer update flow process only need be carried out between MME and local gateway.
Step 707: if MME is provided with release timer, and behind this timer expiry, MME initiates carrying to core net S-GW and discharges flow process (discharging request to core net S-GW transmission carrying release command or session), and indication S-GW does not need to discharge local gateway, after core net S-GW receives this message, discharge the relevant information that the user terminal local IP access connects, comprise beared information or contextual information etc.If MME is not provided with timer, then release flow process is herein triggered automatically by the end of step 706.
After carrying out this flow process, when user terminal reentered connected state, the tunnel changed direct tunnel into indirectly, and had successfully discharged the upward relevant information of the local IP access connection of preservation of core net S-GW.
Fig. 8 more discharges the another kind of flow chart in indirect tunnel in the new technological process for LTE system keeps track of the present invention district, and as shown in Figure 8, this example LTE system keeps track district more discharges indirect tunnel in the new technological process and may further comprise the steps:
Step 801: the user terminal of Idle state regularly or owing to move and cause the tracking area tabulation initiating updating of tracking area flow process that changes.User terminal send NAS message-tracing section updating request to current be the wireless side network element of subscriber terminal service.The wireless side network element is selected the MME of current service for the user, and the tracing section updating request package is contained in initial user message issues MME.
Step 802: carry out the NAS verification process, this step is an optional step.
Step 803:MME initiates IP and connects the bearer update flow process.When the MME judgement need be carried for the user terminal establishment (carrying indication or MME oneself in as tracing section updating judges), need carry out follow-up step for local IP access connection or direct tunnel, otherwise carry out according to prior art.MME judges when the user exists local IP access connection or direct tunnel, need initiate the bearer update flow process to local gateway, when local IP access connects direct tunnel and adopts " background technology " described mode one to set up, the bearer update requirements of process is through core net S-GW, when local IP access connected direct tunnel and adopts " background technology " described mode two to set up, the bearer update flow process only need be carried out between MME and local gateway.
When MME when local gateway is initiated the bearer update flow process, release timer can be set on MME, prepare to initiate the release that local IP access connects indirect tunnel.
Wherein, any time after this step and before the execution in step 805 all can be provided with this release timer.
Step 804: carry out radio bearer and set up process;
Step 805: if MME is provided with release timer, and behind this timer expiry, MME initiates carrying to core net S-GW and discharges flow process, and indication S-GW does not need to discharge local gateway.After core net S-GW receives this message, discharge the relevant information that the user terminal local IP access connects, comprise beared information, contextual information etc.If MME is not provided with timer, then release flow process is herein triggered automatically by the end of step 804.
After carrying out the handling process of this example, when user terminal reentered connected state, the tunnel changed direct tunnel into indirectly, and had successfully discharged the upward relevant information of the local IP access connection of preservation of core net S-GW.
In the embodiment shown in fig. 8, not changing with MME is example, the tracing section updating flow process that MME changes similarly, it is mutual to need to carry out context between just new, the old MME, the setting of release timer, the release of S-GW are carried out by old MME.
In order to simplify description, above embodiment is not only to exist home base-station gateway and local access network to close to be arranged in the wireless side network element or near the situation it is that example illustrates the method for releasing that direct tunnel style local IP access is connected.Exist the situation of home base-station gateway similar with it.Certainly, there is home base-station gateway, and local access network closes when being positioned near wireless side network element or its, and the message between message between Mobility Management Entity and the wireless side network element and Mobility Management Entity and the local access network pass will be via the home base-station gateway transmission.When there being home base-station gateway, and local access network closes when being positioned near home base-station gateway or its, message between Mobility Management Entity and the wireless side network element will be via the home base-station gateway transmission, and Mobility Management Entity and the local access network message between closing no longer needs home base-station gateway to transmit.In these cases, the delivery mode of local IP access is very similar to the foregoing description, can not impact setting forth the present invention, so no longer be repeated in this description at this.
Above embodiment not only can be applied to the base station from home system, is suitable for and the macro base station system too.The wireless side network element can be base station, base station from home, home base-station gateway or radio network controller (RNC in the above-described embodiments, Radio Network Controller), also can be the combination of Home eNodeB and femto gateway, or the combination of macro base station and radio network controller.It is L-PGW that local access network closes.The core net gateway can be S-GW.The core net IAD can be P-GW.The wireless side network element of local IP access can to close the address identical with local access network.
It can be the triage operator of local IP access subscriber's local network, local IP access company local network or local IP access the Internet or Internet service that local IP access connects.The wireless side network element of local IP access can be identical with the local gateway address.
The local IP access that relates among the present invention can refer to LIPA, comprises one of following: the triage operator of local IP access subscriber's local network, local IP access company local network, local IP access the Internet, the Internet or company or home business.
Fig. 9 supports the composition structural representation of the delivery system that the tunnel connects in the communication system of local IP access for the present invention, as shown in Figure 9, the present invention supports the delivery system that the tunnel connects in the communication system of local IP access to comprise first determining unit 91, first transmitting element 92 and releasing unit 93, wherein, first determining unit 91 is arranged in MME, be used for whether definite user terminal is current has the tracking area of professional or described user terminal whether to upgrade, trigger first transmitting element 92 when being; First transmitting element 92 is used for sending to the core net gateway release message of the local IP access connection of described user terminal; Releasing unit 93 is arranged in described core net gateway, is used for discharging according to described release message the information of the local IP access connection of described user terminal.Wherein, the information of described local IP access connection comprises beared information or contextual information.
The present invention supports the delivery system that the tunnel connects in the communication system of local IP access also to comprise: notification unit, be arranged in described MME, be used for when described user terminal enters idle condition or the downlink data arrival of described user terminal is arranged, notifying described core net gateway; Preserve the unit, be arranged in described core net gateway, be used to preserve the local IP access link information of described user terminal; Bearer update is initiated the unit, is used for initiating the bearer update that described local IP access connects to local gateway.
Above-mentioned wireless side network element comprises Home eNodeB or macro base station or the combination of femto gateway or radio network controller or Home eNodeB and femto gateway or the combination of macro base station and radio network controller.
The present invention supports the delivery system that the tunnel connects in the communication system of local IP access also to comprise: second transmitting element, be used at described user terminal when business is arranged, and send service request to described MME; First initiates the unit, is arranged in described MME, is used for initiating described user terminal context to described wireless side network element and sets up request; First judging unit is arranged in described MME, is used for after radio bearer between described wireless side network element and the described user terminal is set up, and judges that whether described user terminal exists local IP access to connect, and triggers second and initiates the unit when existing; Second initiates the unit, is used for initiating bearer update to local gateway, and sends the release message that local IP access connects by described first transmitting element to described core net gateway.
Perhaps, the present invention supports the delivery system that the tunnel connects in the communication system of local IP access also to comprise: the unit is set, is used to be provided with release timer; Second transmitting element is used at described user terminal when business is arranged, and sends service request to described MME; The 3rd initiates the unit, is arranged in described MME, is used for initiating described user terminal context to described wireless side network element and sets up request; Second determining unit is used for determining whether described release timer is overtime, triggers first transmitting element when being and sends the release message that local IP access connects to described core net gateway.
Perhaps, the present invention supports the delivery system that the tunnel connects in the communication system of local IP access also to comprise: the 3rd transmitting element, be used for upgrading that the tracking area tabulation cycle arrives or, sending the tracing section updating request to described wireless side network element because of described user terminal moves when causing the tracking area tabulation to change at described user terminal; First selected cell is arranged in described wireless side network element, is used to described user terminal selecting MME; First retransmission unit is arranged in described wireless side network element, is used for described tracing section updating request is transmitted to described MME; The 4th initiates the unit, is arranged in described MME, is used for initiating described user terminal context to described wireless side network element and sets up request; Second judging unit is arranged in described MME, is used for after radio bearer between described wireless side network element and the described user terminal is set up, and judges that whether described user terminal exists local IP access to connect, and triggers the 5th and initiates the unit when existing; The 5th initiates the unit, is used for initiating bearer update to local gateway, and sends the release message that local IP access connects by described first transmitting element to described core net gateway.
Perhaps, the present invention supports the delivery system that the tunnel connects in the communication system of local IP access also to comprise: the 4th transmitting element, be used for upgrading that the tracking area tabulation cycle arrives or, sending the tracing section updating request to described wireless side network element because of described user terminal moves when causing the tracking area tabulation to change at described user terminal; Second selected cell is arranged in described wireless side network element, is used to described user terminal selecting MME; Second retransmission unit is arranged in described wireless side network element, is used for described tracing section updating request is transmitted to described MME; The 6th initiates the unit, is arranged in described MME, is used for initiating described user terminal context to described wireless side network element and sets up request; The 3rd determining unit is used for determining whether described release timer is overtime, triggers first transmitting element when being and sends the release message that local IP access connects to described core net gateway.
Those skilled in the art are to be understood that, shown in Figure 9 or, the present invention support the tunnel connects in the communication system of local IP access delivery system be for realize aforesaid or, the present invention supports the method for releasing that the tunnel connects in the communication system of local IP access to be provided with, the function of each processing unit can be understood to the description of method shown in Figure 8 with reference to Fig. 6 in the system shown in Figure 9, the function of each processing unit can realize by the program that runs on the processor, also can realize by concrete logical circuit.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.
Claims (16)
1. the method for releasing that the tunnel connects in the communication system of supporting local IP access is characterized in that, comprising:
Carry out in service request or the tracing section updating process at user terminal, Mobility Management Entity MME sends the release message that local IP access connects to the core net gateway, and described core net gateway discharges the information of the local IP access connection of described user terminal according to described release message.
2. method according to claim 1 is characterized in that, the information that described local IP access connects comprises beared information or contextual information.
3. method according to claim 1 and 2 is characterized in that, before service request or tracing section updating, described method also comprises:
When described user terminal enters idle condition or the downlink data arrival of described user terminal is arranged, the local IP access link information that described MME notice core net gateway is preserved described user terminal, and the bearer update of initiating described local IP access connection to local gateway.
4. method according to claim 3, it is characterized in that described wireless side network element comprises Home eNodeB or macro base station or the combination of femto gateway or radio network controller or Home eNodeB and femto gateway or the combination of macro base station and radio network controller.
5. method according to claim 3 is characterized in that, described MME sends the release message that the local IP access of described user terminal connects to the core net gateway, comprising:
Described user terminal sends service request to described MME when business is arranged, described MME initiates described user terminal context to described wireless side network element and sets up request;
Described MME is after radio bearer between described wireless side network element and the described user terminal is set up, judge whether described user terminal exists local IP access to connect, initiate bearer update to local gateway when existing, and send the release message that local IP access connects to described core net gateway.
6. method according to claim 3 is characterized in that, described MME sends the release message that the local IP access of described user terminal connects to the core net gateway, comprising:
Described user terminal is when having business, send service request to described MME, described MME initiates described user terminal context to described wireless side network element and sets up request, and sends the release message that local IP access connects to described core net gateway when set release timer is overtime.
7. method according to claim 3 is characterized in that, described MME sends the release message that the local IP access of described user terminal connects to the core net gateway, comprising:
Described user terminal regular update tracking area is tabulated or is caused the tracking area tabulation to change because of moving, send the tracing section updating request to described wireless side network element, described wireless side network element is described user terminal selecting MME, and described tracing section updating request is transmitted to described MME, described MME initiates described user terminal context to described wireless side network element and sets up request;
Described MME is after radio bearer between described wireless side network element and the described user terminal is set up, judge whether described user terminal exists local IP access to connect, initiate bearer update to local gateway when existing, and send the release message that local IP access connects to described core net gateway.
8. method according to claim 3 is characterized in that, described ME sends the release message that the local IP access of described user terminal connects to the core net gateway, comprising:
Described user terminal regular update tracking area is tabulated or is caused the tracking area tabulation to change because of moving, send the tracing section updating request to described wireless side network element, described wireless side network element is described user terminal selecting MME, and described tracing section updating request is transmitted to described MME, described MME initiates described user terminal context to described wireless side network element and sets up request, and sends the release message that local IP access connects to described core net gateway when set release timer is overtime.
9. the delivery system that the tunnel connects in the communication system of supporting local IP access is characterized in that, comprising:
First determining unit is arranged in described MME, is used for whether definite user terminal is current has the tracking area of professional or described user terminal whether to upgrade, and triggers first transmitting element when being;
First transmitting element is used for sending the release message that the local IP access of described user terminal connects to the core net gateway;
Releasing unit is arranged in described core net gateway, is used for discharging according to described release message the information of the local IP access connection of described user terminal.
10. system according to claim 9 is characterized in that, the information that described local IP access connects comprises beared information or contextual information.
11., it is characterized in that described system also comprises according to claim 9 or 10 described systems:
Notification unit is arranged in described MME, is used for notifying described core net gateway when described user terminal enters idle condition or the downlink data arrival of described user terminal is arranged;
Preserve the unit, be arranged in described core net gateway, be used to preserve the local IP access link information of described user terminal;
Bearer update is initiated the unit, is used for initiating the bearer update that described local IP access connects to local gateway.
12. system according to claim 11, it is characterized in that described wireless side network element comprises Home eNodeB or macro base station or the combination of femto gateway or radio network controller or Home eNodeB and femto gateway or the combination of macro base station and radio network controller.
13. system according to claim 11 is characterized in that, described system also comprises:
Second transmitting element is used at described user terminal when business is arranged, and sends service request to described MME;
First initiates the unit, is arranged in described MME, is used for initiating described user terminal context to described wireless side network element and sets up request;
First judging unit is arranged in described MME, is used for after radio bearer between described wireless side network element and the described user terminal is set up, and judges that whether described user terminal exists local IP access to connect, and triggers second and initiates the unit when existing;
Second initiates the unit, is used for initiating bearer update to local gateway, and sends the release message that local IP access connects by described first transmitting element to described core net gateway.
14. system according to claim 11 is characterized in that, described system also comprises:
The unit is set, is used to be provided with release timer;
Second transmitting element is used at described user terminal when business is arranged, and sends service request to described MME;
The 3rd initiates the unit, is arranged in described MME, is used for initiating described user terminal context to described wireless side network element and sets up request;
Second determining unit is used for determining whether described release timer is overtime, triggers first transmitting element when being and sends the release message that local IP access connects to described core net gateway.
15. system according to claim 11 is characterized in that, described system also comprises:
The 3rd transmitting element is used for upgrading that the tracking area tabulation cycle arrives or because of described user terminal moves when causing the tracking area tabulation to change, sending the tracing section updating request to described wireless side network element at described user terminal;
First selected cell is arranged in described wireless side network element, is used to described user terminal selecting MME;
First retransmission unit is arranged in described wireless side network element, is used for described tracing section updating request is transmitted to described MME;
The 4th initiates the unit, is arranged in described MME, is used for initiating described user terminal context to described wireless side network element and sets up request;
Second judging unit is arranged in described MME, is used for after radio bearer between described wireless side network element and the described user terminal is set up, and judges that whether described user terminal exists local IP access to connect, and triggers the 5th and initiates the unit when existing;
The 5th initiates the unit, is used for initiating bearer update to local gateway, and sends the release message that local IP access connects by described first transmitting element to described core net gateway.
16. system according to claim 11 is characterized in that, described system also comprises:
The 4th transmitting element is used for upgrading that the tracking area tabulation cycle arrives or because of described user terminal moves when causing the tracking area tabulation to change, sending the tracing section updating request to described wireless side network element at described user terminal;
Second selected cell is arranged in described wireless side network element, is used to described user terminal selecting MME;
Second retransmission unit is arranged in described wireless side network element, is used for described tracing section updating request is transmitted to described MME;
The 6th initiates the unit, is arranged in described MME, is used for initiating described user terminal context to described wireless side network element and sets up request;
The 3rd determining unit is used for determining whether described release timer is overtime, triggers first transmitting element when being and sends the release message that local IP access connects to described core net gateway.
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