CN100420232C

CN100420232C - A method for transmitting service flow data packets

Info

Publication number: CN100420232C
Application number: CNB2004100388140A
Authority: CN
Inventors: 陈悦鹏; 马朝晖
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2004-04-30
Filing date: 2004-04-30
Publication date: 2008-09-17
Anticipated expiration: 2024-04-30
Also published as: CN1691642A

Abstract

The present invention discloses a method for transmitting service flow data packets. Service flow data packets are transmitted from a supporting node (SGSN) of a service general packet radio service (GPRS) in a universal mobile telecommunication system (UMTS) at the calling part to a gateway GPRS supporting node (GGSN), to an external internet protocol (IP) backbone network of the UMTS, to the GGSN and the SGSN in the UMTS of the called party, and until the called part according to transmitting service flow data packets of a label switch path (LSP) preliminarily selected. In the integral transmitting process, the method of the present invention can ensure QoS at the UMTS side of the calling party from the SGSN to the GGSN, and the QoS at the UMTS side of the called party from the GGSN to the SGSN, and accordingly, the QoS between the SGSN and the GGSN in the UMTS is ensured.

Description

A kind of method of transport service stream packets

Technical field

The present invention relates to network transmission technology, particularly related to the be engaged in method of transport service stream packets between (GPRS) support node (SGSN) and the Gateway GPRS Support Node (GGSN) of a kind of service universal packet wireless business in universal mobile telecommunications system (UMTS).

Background technology

UMTS is the 3-G (Generation Three mobile communication system) (3G) that adopts Wideband Code Division Multiple Access (WCDMA) (WCDMA) system air interface technologies, and the UMTS system is commonly called the WCDMA system.The UMTS system adopts and the similar structure of second generation mobile communication system, comprise Radio Access Network (Radio AccessNetwork, RAN) and core network (Core Network, CN).Wherein, RAN realizes wireless access function, and CN realizes that all voice calls are connected with data in the UMTS system, and the exchange of realization and external network and routing function.CN from be divided in logic circuit commutative field (Circuit SwitchedDomain, CS) and packet-switched domain (Packet Switched Domain, PS).

PS territory in the UMTS core network adopts Internet protocol (IP) as its bearing protocol.Because the IP technology is adopted in the PS territory, and there is (QoS) shortcoming that guarantees that do not have QoS in the IP technology, thereby causes the PS territory also to have the shortcoming of no QoS assurance.

But all multi-services that UMTS provides such as business, particularly multimedia service such as voice, variable-speed data and motion video sessions, have proposed strict requirement to QoS.Do not have the problem of QoS for the PS territory that solves UMTS, realize that QoS guarantees that the end-to-end QoS framework of UMTS is suggested (3GPP TS23.207) end to end.

Fig. 1 is the schematic diagram of the inner QoS framework of UMTS in the prior art.As shown in Figure 1, in UMTS inside, the QoS framework of wireless core network (CN) side comprises Application Function (AF), strategy decision functional entity (PDF) and Gateway GPRS Support Node (GGSN), wherein,

AF provides the function of application that needs control IP carrying demand, and by Gq interface and the mutual dynamic QoS related service of PDF message; PDF is logic strategy decision unit, carries out strategy based on the resource request of AF and session information and determines, and by Go interface tactful determination result is issued to GGSN; GGSN provides CN and route external data network between and the encapsulation function of packet in UMTS inside, and the strategy that PDF issues is installed, and carries out the forwarding of packet according to strategy.

Fig. 2 is that end-to-end QoS is divided the section schematic diagram.As shown in Figure 2, QoS can be divided into 3 sections end to end, in UMTS inside, and QoS from subscriber equipment (UE) to Serving GPRS Support Node (SGSN) and the QoS from SGSN to GGSN, and QoS from the GGSN of UMTS inside to UMTS external IP backbone network.

At present, guarantee the QoS measure between inner SGSN of UMTS and the GGSN, comprise integrated service (IntServ) model and differentiated service (DiffServ) model.

Integrated service (IntServ) model uses resource reservation (RSVP) agreement, and RSVP is a kind of signaling protocol of reserved resource.Fig. 3 uses integrated service model to guarantee the flow chart of SGSN to the QoS of GGSN in the prior art.As shown in Figure 3, in calling party's UMTS side of living in, integrated service model guarantees that the process of the QoS from SGSN to GGSN is:

Step 301, in calling party's UMTS side of living in, after calling party's subscriber equipment (UE) sends the service conversation request, to SGSN transmit path (PATH) message, SGSN is with on the edge router of PATH forwards in the IP backbone between SGSN and the GGSN before the transmitting and receiving service stream packets.

In the IP backbone between step 302, SGSN and the GGSN, comprise that each level router of edge router sends PATH message step by step downwards, until GGSN.

Step 303, from GGSN step by step upwards to SGSN, send RESV message to its upstream respectively, this RESV message request upstream router reserves qos parameter designated bandwidth resource, and each level router judges respectively whether it currently exists available bearing resource when receiving RESV message, if exist, then execution in step 305, otherwise, execution in step 304.

Step 304, the router that does not have a bearing resource do not send RESV message to its upstream router, and upstream routers at different levels and SGSN do not receive RESV message in setting-up time, think that then resource reservation is unsuccessful, jump out this flow process.

When step 305, each level router all receive RESV message to SGSN, be this professional bandwidth reserved, and preserve relevant state information.

Step 306, SGSN are forwarded to GGSN by each level router in the IP backbone with the traffic data bag.

In differentiated service (DiffServ) model, the client signs service class contract (SLA) with Network Provider in advance.SLA is clear and definite this client's business-level and the traffic that in each business-level, is allowed, the i.e. required transmission bandwidth of traffic data bag.

In calling party's UMTS side of living in, the differentiated service model guarantees that the process of the QoS from SGSN to GGSN is: when receiving the traffic data bag that SGSN sends, edge router in the differentiated service model carries out priority classification according to this user's rank for the traffic data bag, and it is transferred to next intermediate router in the network; Each level router is directly transmitted it according to the priority of this traffic data bag, until GGSN when receiving the traffic data bag.

In the prior art, the IP backbone of UMTS outside also uses integrated service model or differentiated service model to guarantee the QoS of transport service stream packets, therefore, the principle of GGSN to the UMTS external IP backbone network guaranteed qos process from calling party UMTS of living in guarantees that with above-mentioned integrated service model or the differentiated service model of using the principle of the QoS process from SGSN to GGSN is identical in calling party UMTS of living in.

And in callee's UMTS side of living in, IP backbone between GGSN and the SGSN uses integrated service model or differentiated service model, and the process that guarantees the QoS from GGSN to SGSN is identical with the principle of the above-mentioned detailed process of using integrated service model or the QoS of differentiated service model assurance from SGSN to GGSN in calling party's UMTS side of living in.

Calling party UMTS of living in, UMTS external IP backbone network and callee UMTS of living in are when using the integrated service model guaranteed qos, and each level router in the integrated service model regularly upgrades the state information of its preservation.

As seen, there is following shortcoming in prior art:

1, when striding the radio communication of UMTS territory scope, for the differentiated service model, (comprise between inner SGSN of UMTS and the GGSN in the QoS assurance and IP backbone of UMTS itself, and between GGSN and the external IP network) QoS guarantee it is two independently processes, carry out the QoS assurance according to its Business Stream that receives respectively with overseas in the UMTS territory, even guarantee so Business Stream obtains QoS in UMTS inside, and when it arrives IP backbone, probably because IP backbone does not have sufficient bearing resource, make Business Stream be rejected or lose, thereby can't guarantee SGSN and GGSN from calling party UMTS of living in, the QoS of GGSN to SGSN in the callee UMTS of living in promptly can't guarantee the QoS between SGSN and the GGSN.

2, calling party UMTS of living in inside from SGSN to GGSN, the IP backbone of UMTS outside and callee UMTS of living in inside is from GGSN to SGSN, when adopting the integrated service model guaranteed qos, need be to the PATH and the RSVP state information of each its preservation of equipment periodic refreshing in the integrated service model, and a large amount of periodic refreshing PATH and RSVP state information are very big to processor, buffer (Buffer) and the memory consumption of the network equipment, and influence the UMTS stability of network, do not possess extensibility, thereby seriously restricted the practical application of integrated service model.

3, calling party UMTS of living in inside from SGSN to GGSN, the IP backbone of UMTS outside and callee UMTS of living in inside is from GGSN to SGSN, when adopting differentiated service model guaranteed qos, because each level router can't judge whether and can provide quality assurance for business according to network topology and resource situation, just directly transmit, thereby can't when session is set up, provide QoS to guarantee according to the priority of traffic data bag.

Fig. 4 is the QoS framework schematic diagram that IP backbone adopts independent resource control in the prior art.As shown in Figure 4, in order to solve the shortcoming that IP backbone adopts integrated service model or differentiated service model guaranteed qos, at present, a kind of QoS model that adopts independent resource control at the IP backbone of UMTS outside has been proposed, this QoS model can be divided into three layers according to function, is respectively: service control layer, bearer control layer and bearing bed.Wherein, service control layer is made up of all kinds of service servers of the processing grouped data application in the IP backbone network, to the bearer path of bearer control layer application Business Stream; Bearer control layer, (RM) forms by several explorers, be in charge of the Internet resources of bearing bed, comprise bandwidth, processor and buffer (Buffer) etc., carry out resource for every data service application that the Business Stream of qos requirement arranged and allow control, resource allocation and routing, satisfy the qos requirement of Business Stream; Bearing bed is divided into basic bearer network layer and logical bearers network layer, and the IP backbone network physical entity that basic bearer network layer is made up of edge router and core router carries all kinds of IP operation bags.The logical bearers network layer is each logical bearers network that utilizes label switched path (LSP) technology to plan in advance on basic bearer network layer and dispose, the IP operation bag of each logical bearers network carrying particular traffic type or specific QoS grade.

Summary of the invention

In view of this, main purpose of the present invention is to provide a kind of method of transport service stream packets, makes it can guarantee QoS between inner SGSN of UMTS and the GGSN.

In order to achieve the above object, technical scheme of the present invention is achieved in that

A kind of method of transport service stream packets, it is outside in the system of Internet protocol IP backbone to be applied to universal mobile telecommunications system (UMTS), the service server SCS of UMTS inside is linked to each other with explorer RM, and RM linked to each other with Serving GPRS Support Node SGSN, this method may further comprise the steps:

After SCS among A, the caller UMTS receives the service conversation message that the calling party sends, the resource request of carrying the QoS parameter is sent to a RM among the caller UMTS;

The resource request that B, a RM will carry the QoS parameter is sent to entity the 2nd RM of bearer control layer in the UMTS external IP backbone network, and the resource request that the 2nd RM will carry the QoS parameter again is sent to the 3rd RM among the called UMTS,

The one RM, the 2nd RM and the 3rd RM be according to the QoS parameter of carrying in the resource request, is be responsible for assigning bandwidth and select label switching path LSP of this traffic data respectively in each automatic network;

C, a RM with among the selected caller UMTS among the step B, in the external IP backbone network and the LSP among the called UMTS be sent to SGSN among the caller UMTS;

D, this SGSN transmit this traffic data bag by each level router among UMTS external IP backbone network and the callee UMTS, until the callee.

Carry in the service conversation message that described QoS parameter is sent for the calling party.

Described QoS parameter is that SCS determines according to predefined this calling subscriber's user class.

After described the 2nd RM received the resource request of carrying the QoS parameter that a RM sends, step B comprised:

B0, the 2nd RM judge whether there is available bearer network resource in UMTS external IP backbone network, if exist, then the 2nd RM resource request that will carry the QoS parameter is sent to the 3rd RM, otherwise, step by step return failed message through a RM, SCS to the calling party from the 2nd RM, and jump out this flow process.

Described step B further comprises:

B1, the 3rd RM are sent to the 2nd RM with the LSP of its selection;

B2, the 2nd RM are sent to a RM with the LSP that LSP and its of its selection receives;

A described RM, the 2nd RM and the 3rd RM described resource request of Gq+ interactive interfacing and LSP by setting up.

The RM of described UMTS inside is connected by the Go+ interface that is provided with SGSN.

Described step D comprises:

SGSN among D1, the caller UMTS successively successively is pressed in traffic data bag to each grade LSP of calling party the callee;

SGSN among D2, the caller UMTS is sent to UMTS external IP backbone network according to path shown in the top-level tab with the traffic data bag;

SGSN and each level router in D3, the UMTS external IP backbone network among each level router and the called UMTS, finish forwarding according to path shown in the top-level tab in its traffic data bag that receives, and after finishing forwarding, the top-level tab in the traffic data bag is ejected.

After described step D, this method further comprises:

SCS among E1, the caller UMTS notifies a RM to stop this service conversation;

SGSN, the 2nd RM and the 3rd RM among E2, the RM notice caller UMTS stop this service conversation;

E3, a RM, the 2nd RM and the 3rd RM discharge shared Internet resources respectively, the SGSN deletion corresponding business service quality policy among the caller UMTS.

As seen, the method for the present invention's proposition has the following advantages:

1, the method for the present invention's proposition is included SGSN and GGSN in the QoS framework of UMTS inside in, thereby can be guaranteed the QoS of calling party UMTS inside from SGSN to GGSN, and guarantees the QoS of callee UMTS inside from GGSN to SGSN.2, in the present invention, each functional entity in the inner QoS model of UMTS obtains by original each functional entity of QoS framework being carried out the function corresponding enhancing, and do not change the original QoS framework of UMTS, thereby make that the present invention is easy to realize, and greatly reduced impact original QoS framework.

3, the method that proposes of the present invention is divided into some management domains with the inner SGSN of UMTS to the IP backbone between the GGSN, thus help stability of network with and management.

4, use method of the present invention, RM on each management domain carries out Signalling exchange about QoS by the Gq+ interface of setting up, so when some management domains do not have sufficient resources, RM on this management domain then can be by the notice of the RM on other management domain SCS refusal active user's business application, thereby saved Internet resources, improved the performance of system.

Description of drawings

Fig. 1 is the schematic diagram of the inner QoS framework of UMTS in the prior art.

Fig. 2 is that end-to-end QoS is divided the section schematic diagram.

Fig. 3 uses integrated service model to guarantee the flow chart of SGSN to the QoS of GGSN in the prior art.

Fig. 4 is the QoS framework schematic diagram that IP backbone adopts independent resource control in the prior art.

Fig. 5 is a QoS framework schematic diagram among the present invention.

Fig. 6 is the schematic diagram that the present invention is divided into the IP backbone between SGSN and the GGSN some management domains.

The present invention guaranteed the embodiment flow chart of the QoS of institute's transport service stream packets when Fig. 7 was calling party UE application QoS resource.

The present invention guaranteed the embodiment flow chart of the QoS of institute's transport service stream packets when Fig. 8 was calling party UE renewal QoS resource.

The present invention guaranteed the embodiment flow chart of the QoS of institute's transport service stream packets when Fig. 9 was calling party UE release QoS resource.

Embodiment

For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with drawings and the specific embodiments.

Fig. 5 is a QoS framework schematic diagram among the present invention.As shown in Figure 5, the QoS framework of UMTS inside comprises service server (SCS), explorer (RM), SGSN and GGSN, wherein,

SCS realizes the function of AF in the prior art QoS framework, and promptly SCS provides the function of application that needs control IP carrying demand, and by Gq interface and the mutual dynamic QoS related service of RM message; RM carries out function by PDF in the prior art QoS framework and expands, be that RM manages bearing resource, finish the carrying routing function, QoS resource and carrying routing iinformation are integrated the decision of work strategy, and tactful determination result is issued to SGSN by the Go+ interface of setting up, Go+ interface and Go interface functional similarity, different is between PDF and SGSN; SGSN provide packet UMTS inside from SGSN to GGSN between route and encapsulation function, and the strategy that RM issues is installed, adopt the multiprotocol label switching (mpls) technology, the corresponding business stream packets is stamped the multistage label stack of respective path, and carry out the forwarding of packet according to path shown in the label.

In the present invention, the IP backbone between inner SGSN of the IP backbone of UMTS outside and UMTS and the GGSN all adopts the QoS model of independent resource control in the prior art.

Fig. 6 is the schematic diagram that the present invention is divided into the IP backbone between SGSN and the GGSN some management domains.As shown in Figure 6, for ease of management and stability of network, the IP backbone with between inner SGSN of UMTS and the GGSN is divided into some management domains, and the division and the routed domain of management domain are identical or different.Correspondingly, RM is set respectively on each management domain, respectively the bearing resource on its management domain is managed, as the RM on the SGSN management domain of living in SGSN and some routers are managed and carry routing, RM on other non-border control territory manages and carries routing to the some routers in this management domain, and the RM on the GGSN management domain of living in manages and carry routing to GGSN and some routers.And the RM on each management domain is by information such as the Gq+ interactive interfacing QoS resource of setting up and IP bearer paths.

The present invention guaranteed the embodiment flow chart of the QoS of institute's transport service stream packets when Fig. 7 was calling party UE application QoS resource.As shown in Figure 7, when calling party UE initiated to set up conversation request and apply for the QoS resource, the present invention guaranteed that the detailed process of the QoS of institute's transport service stream packets may further comprise the steps:

Step 701, in calling party UMTS side, calling party UE sets up signaling with session and is sent to SCS, this signaling is finished the session of IP network and is set up function, and, carry callee's positional information in this signaling, as IP address or telephone number.

Here, the signaling that calling party UE sent includes but not limited to SIP signaling etc.

Step 702, in calling party UMTS side, SCS selects the path according to callee's positional information, and signaling is set up in this session be sent to the callee and obtain callee's Business Stream receiver address alternately with the callee, the SCS QoS resource request that will carry qos parameter is sent to the RM on the SGSN management domain of living in then.

Here, qos parameter has been specified the required bandwidth of this traffic data bag.

Step 703, in calling party UMTS side, the QoS resource request that RM on the SGSN management domain of living in will carry qos parameter by the Gq+ interface is sent to the RM on other management domain, RM on GGSN management domain of living in, the QoS resource request that to carry qos parameter by the Gq+ interface by this RM is sent to the RM in the UMTS external IP backbone network again, this RM is sent to the RM on each management domain among the callee UMTS of living in by the QoS resource request that the Gq+ interface will carry qos parameter again, RM in callee UMTS of living on the SGSN management domain of living in, and when each RM receives the QoS resource request, be respectively this traffic data bag bandwidth reserved and select LSP in its management domain;

RM from callee UMTS of living on the SGSN management domain of living in is the RM on the SGSN management domain of living in to the calling party UMTS of living in, each RM is placed on the LSP of its selection step by step by the Gq+ interface and is sent to the RM on the SGSN management domain of living among the calling party UMTS in the tactful decision message, and the tactful decision message of carrying LSP that this RM will receive again is sent to the SGSN among the calling party UMTS of living in.

Here, if SGSN among calling party or the callee UMTS of living in and GGSN are positioned on the same management domain, then directly select LSP from SGSN to GGSN by the RM on this management domain.

If the SGSN among calling party or the callee UMTS of living in is positioned on the different management domains with GGSN, RM on each management domain selects this traffic data bag jointly and passes the LSP that each management domain arrives callee's SGSN from calling party's SGSN so, and its specific implementation process is:

RM on the calling party SGSN management domain of living in searches route according to callee's positional information of carrying in this service conversation message, select it to arrive the path of RM in the management domain of downstream, and pass through the Gq+ interface with this service conversation message and QoS resource request, and the LSP outlet information in this management domain is sent to the RM in the management domain of downstream.The rest may be inferred, and the RM until arriving on the callee SGSN management domain of living in selects LSP by this RM again in its management domain,

Then, the RM each management domain from callee SGSN management domain of living in to calling party SGSN management domain direction of living in successively reports to RM on the calling party SGSN management domain of living in by the Gq+ interface with the LSP in its management domain.So far, the RM on the SGSN management domain of living among the calling party UMTS of living in obtains this traffic data bag is transferred to callee SGSN from calling party SGSN all LSP.

Step 704, in calling party's UMTS side of living in, SGSN judges whether it receives the tactful decision message that RM sends, if receive, then SGSN returns tactful success response to RM, and execution in step 706 is not if receive, then SGSN returns tactful failure response to RM, execution in step 705.

Step 705, RM are sent to SCS with the resource request failure response, and SCS returns session to calling party UE again and sets up failed message, jump out this flow process then.

Step 706, RM are sent to SCS with the resource request success response, and SCS returns session to calling party UE again and sets up success message.

Step 707, calling party UE receive after session sets up success message, will activate PDP Context (Activate PDP Context) message and be sent to SGSN.

Step 708, SGSN are by related this session and corresponding QoS resource authorization, corresponding QoS request is described in PDPContext, create PDPContext between SGSN and GGSN alternately, UE and SGSN set up wireless access net loaded (Radio Access Bearer) alternately then.

Step 709, SGSN return to calling party UE and activate PDP Context acceptance (Activate PDPContext Accept) message.

After step 710, calling party UE receive Activate PDP Context Accept message, think that qos signaling sets up process and finish, then begin to send its traffic data bag to SGSN.

In the present embodiment, after SGSN receives the traffic data bag that calling party UE sends, successively the traffic data bag of this service conversation is stamped the multistage label stack to callee's SGSN direction respective paths according to its LSP that receives again from this calling party's SGSN, according to path shown in the label it is transmitted to the edge router of IP backbone between calling party SGSN and the GGSN then, each level router of in this edge router and the IP backbone other receives path shown in the top-level tab in the traffic data bag according to it and transmits, simultaneously, when the LSP of top-level tab correspondence ends at certain router, this router ejects top-level tab, until calling party's GGSN.Afterwards, according to the principle of described transmission course, the traffic data bag is transferred to the GGSN to SGSN that UMTS external IP backbone network transfers to the callee again from this calling party's GGSN.

The present invention guaranteed the embodiment flow chart of the QoS of institute's transport service stream packets when Fig. 8 was calling party UE renewal QoS resource.As shown in Figure 8, upgrade the QoS resource request when calling party UE initiation, when promptly needing to redefine the LSP of transport service stream packets, the present invention guarantees that the detailed process of the QoS of institute's transport service stream packets may further comprise the steps:

Step 801, in calling party's UMTS side of living in, calling party UE upgrades signaling with session and is sent to SCS, this signaling is finished the session updates function in IP territory, and, carry callee's positional information in this signaling, as IP address or telephone number.

Here, the signaling that UE sent includes but not limited to SIP signaling etc.

Step 802, this SCS and callee UE interactive sessions are upgraded signaling, and obtain callee's Business Stream receiver address, and SCS is sent to RM on the SGSN management domain of living in the QoS resource request then.

Step 803 is identical with step 703.

Step 804, SGSN judge whether it receives the tactful decision message that RM sends, if receive, then SGSN returns the policy update success response to RM, execution in step 806, if do not receive, then SGSN returns the policy update failure response to RM, execution in step 805.

Step 805, RM are sent to SCS with the resource updates failure response, and SCS returns the session updates failed message to calling party UE again, jump out this flow process then.

Step 806, RM are sent to SCS with the resource updates success response, and SCS returns the session updates success message to calling party UE again.

Step 807, calling party UE will upgrade PDP Context (Modify PDP Context) message and be sent to SGSN after receiving the session updates success message.

Step 808, SGSN are by related this session and corresponding QoS resource authorization, corresponding QoS request is described in PDPContext, between SGSN and GGSN, carry out interactive refreshing PDPContext, then UE and SGSN interactive modifying wireless access net loaded (Radio Access Bearer).

Step 809, SGSN return to calling party UE and upgrade PDP Context acceptance (Modify PDPContext Accept) message.

After step 810, calling party UE receive Modify PDP Context Accept message, think that the qos signaling renewal process finishes, then begin to send its traffic data bag to SGSN.

In the present embodiment, calling party UE initiates to upgrade the QoS resource request, in other embodiment beyond the present embodiment, also can be that the callee initiates to upgrade the QoS resource request, at this moment, omits step 801, directly since 802.When the calling party initiated in the principle of the detailed process of the QoS of its assurance institute transport service stream packets and the present embodiment, the principle of the detailed process of the QoS of assurance institute transport service stream packets was identical.

The present invention guaranteed the embodiment flow chart of the QoS of institute's transport service stream packets when Fig. 9 was calling party UE release QoS resource.As shown in Figure 9, when calling party UE initiation session release signaling, when finishing this service conversation, the present invention from calling party UMTS of living in to the external IP backbone network again each network equipment to the callee UMTS of living in all need to discharge the QoS resource of this service conversation, its detailed process is:

Step 901, in calling party's UMTS side of living in, calling party UE is sent to SCS with the session release signaling, this signaling is finished the session release function in IP territory.

Here, the signaling that UE sent includes but not limited to SIP signaling etc.

Step 902, SCS and callee UE interactive sessions release signaling, SCS is sent to RM on the SGSN management domain of living in the QoS resource release request then.

RM on step 903, this SGSN management domain of living in sends the session release signaling by Gq+ interface RM in each management domain in other RM and callee UMTS of living in, discharge the bearing resource of this service conversation, the RM on the SGSN management domain of living in RM on the SGSN management domain of living in and SGSN to the calling party UMTS return strategy deletion message step by step from callee UMTS then.

Step 904, in calling party's UMTS side of living in, SGSN judges whether it receives the strategy deletion message that RM sends, if receive, then SGSN returns strategy deletion success response to RM, execution in step 906, if do not receive, then SGSN returns strategy deletion failure response, execution in step 905 to RM.

Step 905, RM are sent to SCS with the response of resource release failure, and SCS returns the response of session release failure to UE again, jumps out this flow process then.

Step 906, RM discharge success response with resource and are sent to SCS, and SCS returns session to UE again and discharges success response.

Step 907, calling party UE will delete PDP Context (Deactivate PDP Context) message and be sent to SGSN after receiving session release success response.

Step 908, SGSN delete PDP Context alternately by related this session and corresponding QoS resource authorization between SGSN and GGSN.

Step 909, SGSN return the deletion PDP Context to calling party UE again and accept (DeactivatePDP Context Accept) message.

Step 910, calling party UE receive Deactivate PDP Context Accept message, and UE and SGSN discharge wireless access net loaded (Radio Access Bearer) alternately.

This shows, in whole transmission course, when the traffic data bag is transferred to the external IP backbone network from the residing UMTS of calling party, the inventive method can be guaranteed the QoS from the SGSN of UMTS inside to GGSN, when being transferred to the callee UMTS of living in from the external IP backbone network, the inventive method can be guaranteed the QoS from the GGSN of UMTS inside to SGSN, and therefore, the inventive method has been guaranteed the QoS between inner SGSN of UMTS and the GGSN.

In the present embodiment, traffic data bag path the LSP of process use be overall label.In other embodiment beyond the present embodiment, also can use the LSP of the local label of interface, the principle of its specific implementation process is identical with the principle of the described process of present embodiment.

In a word, the above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims

1. the method for a transport service stream packets, it is outside in the system of Internet protocol IP backbone to be applied to universal mobile telecommunications system UMTS, it is characterized in that, the service server SCS of UMTS inside is linked to each other with explorer RM, and RM linked to each other with Serving GPRS Support Node SGSN, this method may further comprise the steps:

2. method according to claim 1 is characterized in that, carries in the service conversation message that described QoS parameter is sent for the calling party.

3. method according to claim 1 is characterized in that, described QoS parameter is that SCS determines according to predefined this calling subscriber's user class.

4. method according to claim 1 is characterized in that, after described the 2nd RM received the resource request of carrying the QoS parameter that a RM sends, step B comprised:

5. method according to claim 1 is characterized in that, described step B further comprises:

B1, the 3rd RM are sent to the 2nd RM with the LSP of its selection;

6. method according to claim 5 is characterized in that, a described RM, the 2nd RM and the 3rd RM described resource request of Gq+ interactive interfacing and the LSP by setting up.

7. method according to claim 1 is characterized in that, the RM of described UMTS inside is connected by the Go+ interface that is provided with SGSN.

8. method according to claim 1 is characterized in that, described step D comprises:

9. method according to claim 1 is characterized in that, after described step D, this method further comprises:

SCS among E1, the caller UMTS notifies a RM to stop this service conversation;