CN103139915A

CN103139915A - Method and system for performing resource control on local unloaded data

Info

Publication number: CN103139915A
Application number: CN2011103756958A
Authority: CN
Inventors: 毛玉欣; 周晓云; 宗在峰; 毕以峰
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2011-11-23
Filing date: 2011-11-23
Publication date: 2013-06-05
Also published as: WO2013075580A1

Abstract

The invention discloses a method and a system for performing resource control on local unloaded data. The method includes that after a local gateway (L-GW) receives a trigger message, the L-GW sends a reception control request to a broadband policy control function (BPCF), the BPCF performs reception control and returns a reception control result to the L-GW, when the reception control turns out to be reception, a control policy is issued to a broadband network gateway/broadband remote access server (BNG/BRAS), the control policy at least comprises a customer premise equipment (CPE) internet protocol (IP) address and an authorized quality of service (QoS) message, the L-GW performs load bearing operations according to the reception control result, and the BNG/BRAS performs resource control on a data message packaged by the CPE IP address according to the authorized QoS message. By means of the method and the system, the resource control problem of a local unloading business carried out by user equipment (UE) accesses through home evolved node B (HeNB) is solved, and the QoS of the local unloading business carried out by the UE can be guaranteed.

Description

A kind of method and system that this locality unloading data are carried out resource control

Technical field

The present invention relates to wireless communication technology field, relate in particular to a kind of method and system that this locality unloading data are carried out resource control.

Background technology

Third generation partner program (3GPP, 3rd Generation Partnership Project) the evolution block core net network (EPC of exploitation, Evolved Packet Core network) by mobile management unit (MME, Mobility Management Entity), gateway (S-GW, Serving Gateway), grouped data network gateway (P-GW, Packet Data Network Gateway), home subscriber server (HSS, Home Subscriber Server) etc. network element forms, as shown in Figure 1.

MME is responsible for the related work of the 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 forwarding data between user's access and P-GW, and is responsible for the pending datas such as paging are carried out buffer memory; P-GW is evolved packet system (EPS, Evolved Packet System) and the borde gateway of packet data network (PDN, Packet Data Network), is responsible for the access of PDN and the function such as forwarding data between EPS and PDN.

If (PCC is controlled in the charging of EPC support policy, Policy and Charging Control), "Policy and Charging Rules Function (PCRF, Policy and Charging Rules Function) carry out the formulation of strategy and charging regulation, it is by interface Rx and carrier network agreement (IP, Internet Protocol) application function (AF in business network, Application Function) be connected, obtain business information, be used for generating the business information of PCC strategy.S5 interface between S-GW and P-GW adopts general packet radio service tunnel agreement (GTP, GPRS Tunnelling Protocol) time, resident strategy and charge execution function (PCEF in P-GW, Policy and Charging Enforcement Function), pass through Gx interface exchange message between PCRF and P-GW, being responsible for initiating carrying sets up, revises and discharge, guarantee the service quality (QoS of business data transmission, and carry out charging and control Quality of Service).When the S5 of S-GW and P-GW interface adopts proxy-mobile IP (PMIP, Proxy Mobile IP) time, resident bearing binding and event reporting function (BBERF in S-GW, Bearer Binding and Event Report Function), and pass through Gxc interface exchange message between S-GW and PCRF, be responsible for initiating carrying by BBERF and set up, revise and discharge, guarantee the service quality of business datum, carry out charging by PCEF and control.

The user can be linked into the EPC network by the Universal Terrestrial Radio Access Network (E-UTRAN, Evolved Universal Terrestrial Radio Access Network) of evolution.

In addition, the user can also pass through family base station system (Home NodeB subsystem, referred to as the HNB subsystem) or the family base station system (Home evolved NodeB subsystem is referred to as the HeNB subsystem) of evolution access EPC network, as shown in Figure 1.HeNB/HNB is a kind of small-sized, low power base station, is deployed in the indoor places such as family and office.HeNB/HNB is usually by renting fixed network circuit access EPC.In order to guarantee access security, need deployment secure gateway (SeGW at the EPC network, Security Gateway), HeNB/HNB power on after will and SeGW between set up network security (IPSec, IP Security) tunnel, the subscriber equipment (UE) that accesses by HeNB/HNB and the data of EPC network interaction are all passed through the IPSec encapsulation, make the equipment on circuit can't this partial data of perception, guarantee the fail safe of transfer of data.When using the HeNB system, HeNB GW is optional deployment network element, if do not dispose, HeNB is directly connected to MME.If use the HNB system, HNB GW must dispose network element, and HNB is connected to HNB GW.Be different from addition the HeNB system, the HNB system is support circuit-switched (CS) business also, namely connects between HNB GW and mobile switching centre (MSC, Mobile Switching Center).In order to realize that in the HNB system policy control of CS business is set up the S15 interface between HNB GW and PCRF.

Shown in Figure 1 HeNB/HNB system accesses EPC by fixed network, and the data message of the UE access service of access HeNB/HNB/application all passes through EPC network route.Yet, consider that a large amount of access users all pass through EPC access to netwoks business and not only can increase EPC network traffic data load, and multiple business is seized Internet resources and may be caused and can't provide quality of service guarantee for the high business of qos requirement.Therefore, 3GPP R-11 standard specification definition the offload of HeNB system (local unloading) function, namely access the service/application data of user's access of HeNB system without EPC network route, but the fixed network circuit that directly uses through HeNB system and HeNB system carries out route, and this partial data is called the offload data.

As shown in Figure 2,3GPP R-11 has introduced independently local gateway (L-GW, Local GateWay) network element for the HeNB support offload of system function.Wherein, L-GW is deployed in local network, and function class is similar to P-GW.As L-GW, when HeNB powers on, obtain local ip address from local network respectively, be called L-GW local ip address and HeNB local ip address.L-GW and HeNB utilize respectively local ip address and SeGW to carry out IKEv2 and consult to set up ipsec tunnel, are used for transmission and return the data of EPC network through HeNB system and route.In addition, HeNB and L-GW need to exchange local ip address mutually, set up the Sxx tunnel, are used for the data of transmitting process HeNB system and unloading from local network.After HeNB, L-GW set up ipsec tunnel with SeGW respectively, SeGW also distributed the IP core network address for it, is called the IP core network address of HeNB and the IP core network address of L-GW.

Offlaod data route schematic diagram when Fig. 3 supports the offload function for the HeNB system by BBF network insertion EPC core net.Wherein, HeNB and L-GW are deployed under residence gateway (RG, Residental Gateway), are namely that HeNB and L-GW distribute respectively local private network IP address by RG.When the UE access offload business of access HeNB system, the fixed network line attachment (i.e. RG in figure, BNG/BRAS) that the route of offload data is used through HeNB system (i.e. HeNB in figure, L-GW) and HeNB system.Wherein, BNG is wideband network gateway (Broadband Network Gateway), and BRAS is Broadband Remote Access Server (Broadband Remote Access Server).

When the UE of access HeNB system need to carry out the offload business, at first need the PDN that sets up for access offload business to connect (for example SIPTO connects), as shown in Figure 4.Only have and set up after above-mentioned PDN connects, UE just can carry out the offload business by the HeNB system.Need to prove, the prior art flow process that Fig. 4 describes is the scene that fixed network is not disposed RG, and this moment, the local ip address of HeNB, L-GW can be its distribution by BNG/BRAS.If disposed RG in network, when namely the HeNB system is by the RG access fixed network, can be that HeNB and L-GW distribute local ip address by RG.Flow process shown in Figure 4 mainly comprises:

Step 401, when HeNB power on be accomplished to the access authentication of fixed network after, distribute HeNB local ip address (HeNB@LN address) by fixed network equipment (BNG/BRAS/RG) for it, HeNB utilize HeNB@LN address complete and SeGW between IKEv2 consult to set up ipsec tunnel, SeGW is that HeNB distributes HeNB IP core network address (HeNB@CN address).

Step 402, process and HeNB that L-GW powers on are similar, after completing power up, set up ipsec tunnel between L-GW and SeGW, L-GW gets L-GW local ip address (L-GW@LN address) and L-GW IP core network address (L-GW@CN address).

Step 403, L-GW is to DNS (domain name, Domain Name Service) server initiates to upgrade, with L-GW@LN address, L-GW@CN address, full name domain name (FQDN, Fully Qualified Domain Name), APN (APN, Access Point Name), local home base station network sign (LHN-ID, Local HeNB Network Identity) information sends to dns server to preserve.

Step 404, dns server are returned to the response that is updated successfully.

Step 405, access UE initiates to select IP flow unloading (SIPTO, Selected IP Traffic Offload) connection request, comprises APN information in request message, and when message process HeNB, HeNB carries LHN-ID to MME together.

Step 406 when MME receives described request, at first judges according to APN information whether UE can carry out SIPTO, if can, initiate the DNS inquiry according to LHN-ID, select corresponding L-GW.

Step 407 after L-GW has been selected in the access that dns server is UE, returns to MME with the information of selected L-GW (comprising the information such as L-GW@LN address, L-GW@CN address, FQDN) and preserves.

Step 408, MME sends the session establishment request to S-GW.

Step 409, S-GW sends the session establishment request to selected L-GW.

Step 410 after L-GW receives the session establishment request, returns to the session establishment response to S-GW, comprised tunnel end sign (TEID, Tunnel Endpoint Identifier) that L-GW produces in response message and has been the IP address of UE distribution.

Step 411, corresponding S-GW returns to the session establishment response to MME.

Step 412 after MME receives session establishment response, sends carrying to HeNB and sets up request, comprises the IP address information of L-GW@LN address, FQDN, TEID and UE in request message.

Step 413 is set up RRC and is connected between HeNB and UE, HeNB sends to UE with the IP address of UE.

Step 414, HeNB returns to carrying to MME and sets up response, comprises the TEID that HeNB produces in response message, and HeNB@LN address information.

Step 415, HeNB returns to PDN to MME and connects the information of completing of setting up.

Step 416, MME initiates the bearing modification request by S-GW to L-GW, and brings L-GW with TEID and the HeNB@LN address information of HeNB after receiving that the message of completing is set up in the PDN connection.

Perhaps, MME receive PDN connect to set up complete after, by newly-increased message, TEID and the HeNB@LN address information of HeNB sent to L-GW through S-GW.

So far, set up the Sxx tunnel that is used for carrying offload data between HeNB and L-GW.

Connect when UE completes above-mentioned PDN after (being called SIPTO in diagram connects) set up process, UE uses L-GW just can carry out the offload business for the IP address of its distribution.

Process and data route are set up in the PDN connection that Fig. 3 has been connected with Fig. 4 in the HeNB support offload of system situation.As can be seen from Figure 3, the UE of access HeNB system carries out the data of offload business need to carry out route through the fixed network circuit (backhaul) that the HeNB access is used, and the fixed network resource may cause resource nervous because used by a large number of users (comprising mobile subscriber and fixed network user).If the offload business is the business that need to provide QoS to ensure, can't ensure for offload provides QoS in this case.Therefore, how to be present problem demanding prompt solution for the offload data under above-mentioned scene provide resource to control.

In addition, the below introduces the routing procedure on the fixed network backhaul (being between UE and BNG/BRAS) that HeNB system and HeNB/L-GW access are used of offload data in prior art.

Access the scene of BBF network by RG in conjunction with shown in Figure 3 HeNB system, after HeNB/L-GW powered on, RG distributed respectively local private network IP address (local private network IP address-1 and local private network IP address-2) for it.When utilizing respectively the local private network IP address of self and SeGW, HeNB/L-GW carries out IKEv2 when consulting to set up ipsec tunnel, the local private network IP address-1 of HeNB is carried out network address translation (NAT on RG, Network Address Translation), be converted to public network IP address (be called CPEIP address) and port (collection)-1; The local private network IP address-2 of L-GW is carried out NAT and is converted to CPE IP address and port (collection)-2 on RG.Wherein, CPE is customer premises equipment, CPE (Customer PremiseEquipment).

As shown in Figure 4, the UE of process HeNB system access need to set up PDN and connect before carrying out the offload business.In this process, RG is that UE distributes local private network IP address-3.UE utilizes this IP address just can carry out the offload business.With up offload data instance (descending offload data, only need to be with the source of uplink data messages, purpose IP address, the port numbers exchange gets final product) IP layer data encapsulation format when the data route is described, as shown in Figure 5.

The offload data that UE sends to HeNB, the source address of described data encapsulation are the local private network IP address-3 of UE, and destination address is CN IP address (is Correspondent Node IP address).After message arrives HeNB, carry out the Sxx tunnel encapsulation, source address is the local private network IP address-1 of HeNB, destination address is the local private network IP address-2 of L-GW, and sends to L-GW.After L-GW receives described message, carry out Sxx tunnel decapsulation, and the data message after decapsulation is sent to RG.RG carries out the NAT conversion to the source IP address (being the local private network IP address-3 of UE) of described data message, is transformed into CPE IP address and port numbers-3 and sends to BNG/BRAS afterwards again.

Fig. 6 has provided RG and has carried out the explanation of NAT conversion for the local private network IP address of the devices allocation under its access through RG the time.Be that RG is respectively HeNB, L-GW and UE distributes local private network IP address-1, local private network IP address-2 and local private network IP address-3.(for example HeNB, L-GW initiate the IKEv2 negotiation through RG to SeGW when the said equipment uses respectively the local private network IP address transmission information process RG of RG distribution, perhaps UE initiates the offload business through RG), RG need to be its NAT conversion of carrying out N:1, and namely RG carries out NAT with the local private network IP address-1 of HeNB and is converted to CPE IP address+port (collection) 1; The local private network IP address-2 of L-GW is carried out NAT be converted to CPE IP address+port (collection) 2; The local private network IP address-3 of UE is carried out NAT be converted to CPE IP address+port (collection) 3.Described CPE IP address is the public network IP address after the private network IP address of the equipment under RG accesses it is carried out the NAT conversion.

Summary of the invention

In view of this, main purpose of the present invention is to provide a kind of this locality unloading data is carried out the method and system that resource is controlled, carry out the resource control problem of offload business to solve the UE that accesses by HeNB, make the offload business that UE carries out also can obtain the QoS assurance.

For achieving the above object, technical scheme of the present invention is achieved in that

A kind of method that this locality unloading data are carried out resource control comprises: after local gateway L-GW receives and triggers message, control function BPCF to broadband policy and send the control request of admitting; Described BPCF admits control, return to admit to described L-GW and control result, and control result when accepting in described admittance, issue control strategy to wideband network gateway/Broadband Remote Access Server BNG/BRAS, comprise at least customer premises equipment, CPE procotol CPE IP address and authorization service quality Q oS information in described control strategy.

Return to admittance control result to described L-GW after, the method further comprises: described L-GW is according to admitting the control result to carry operation.

After BNG/BRAS issues control strategy, the method further comprises: described BNG/BRAS carries out resource to the data message that adopts described CPE IP address encapsulation according to described mandate QoS information and controls according to described CPE IP address filtering data message.

Described triggering message is for from resource allocation request, the service request of user equipment (UE) side or come the carrying operation requests of automatic network.

Described L-GW is specially according to admitting the control result to carry operation:

Be refusal if result is controlled in described admittance, the carrying of described L-GW refusal is set up or retouching operation;

Be acceptance if result is controlled in described admittance, described L-GW initiates to carry and sets up or retouching operation.

Before described L-GW received to trigger message, the method further comprises: described BPCF and L-GW set up the first policy control session, and BPCF obtains described CPE IP address; Described BPCF is according to the described BNG/BRAS of described CPEIP address discovery, set up and described BNG/BRAS between the second policy control session.

Described the first policy control session is the policy control session of directly setting up between described BPCF and L-GW; Accordingly, described L-GW is according to the described BPCF of described CPE IP address discovery, and sets up described the first policy control session.

Described the first policy control session is comprised of the policy control session of setting up between the policy control session of setting up between L-GW and "Policy and Charging Rules Function PCRF and PCRF and BPCF; Accordingly, described L-GW is according to LHN-ID or the described PCRF of CPE IP address discovery, and the policy control session between foundation and described PCRF; Described PCRF is according to the described BPCF of described CPE IP address discovery, and the policy control session between foundation and described BPCF.

A kind of system that this locality unloading data are carried out resource control, comprising: local gateway L-GW, broadband policy are controlled function BPCF, wideband network gateway/Broadband Remote Access Server BNG/BRAS, wherein,

Described L-GW after being used for receiving triggering message, sends to described BPCF the request of control of admitting;

Described BPCF, be used for admitting control, return to admit to described L-GW and control result, and control result when accepting in described admittance, issue control strategy to described BNG/BRAS, comprise at least customer premises equipment, CPE procotol CPE IP address and authorization service quality Q oS information in described control strategy;

Described BNG/BRAS is used for receiving the control strategy that described BPCF issues.

Described L-GW is further used for, according to admitting the control result to carry operation.

Described BNG/BRAS is further used for, and according to described CPE IP address filtering data message, the data message that adopts described CPE IP address encapsulation is carried out resource according to described mandate QoS information control.

Described L-GW is further used for, and when result was controlled in described admittance for refusal, the refusal carrying was set up or retouching operation; Control result when accepting in described admittance, initiate carrying foundation or retouching operation.

Described BPCF is further used for, and before described L-GW received to trigger message, described BPCF and L-GW set up the first policy control session, and BPCF obtains described CPE IP address; Described BPCF is according to the described BNG/BRAS of described CPE IP address discovery, set up and described BNG/BRAS between the second policy control session.

A kind of method and system that this locality unloading data are carried out resource control provided by the present invention after L-GW receives and triggers message, sends to admit to control to BPCF and asks; BPCF admits control, returns to L-GW and admit to control result, and control result when accepting admitting, and issues control strategy to BNG/BRAS, comprises at least CPE IP address and mandate QoS information in control strategy; L-GW is according to admitting the control result to carry operation; BNG/BRAS controls according to authorizing QoS information to carry out resource the data message that adopts CPE IP address encapsulation according to CPE IP address filtering data message.

By the present invention, solved the resource control problem that the UE that accesses by HeNB carries out local unloading business, make this locality unloading business that UE carries out also can obtain the QoS assurance.The solution of the present invention is equally applicable to the HNB system.

Description of drawings

Fig. 1 is the configuration diagram of HeNB access EPC of the prior art;

Fig. 2 is the HeNB system schematic that is deployed with independent L-GW of the prior art;

Fig. 3 is the route schematic diagram that accesses down the offload data by HeNB of the prior art;

Fig. 4 is that SIPTO of the prior art connects the flow chart of setting up;

Fig. 5 is under HeNB access scene of the prior art, the encapsulation schematic diagram during offload data route;

Fig. 6 is that RG of the prior art carries out the NAT conversion schematic diagram of N:1 mode to the private network IP address of the equipment under its access;

Fig. 7 is that a kind of of the embodiment of the present invention carries out to this locality unloading data the method flow diagram that resource is controlled;

Fig. 8 is the policy control session Establishing process figure of the embodiment of the present invention one;

Fig. 9 is the policy control session Establishing process figure of the embodiment of the present invention two;

Figure 10 is the policy control session Establishing process figure of the embodiment of the present invention three.

Embodiment

The technical solution of the present invention is further elaborated below in conjunction with the drawings and specific embodiments.

The data message of carrying out the offload business due to the UE through the HeNB system access is in the conversion that all needs to carry out UE private network IP address and CPE IP address through RG, that is to say, the offload data message of route all uses CPE IP address to encapsulate between RG and BNG/BRAS.Therefore, the present invention is before the offload business is carried out, and Establishment strategy is controlled session on BNG/BRAS, and described CPE IP address is sent to BNG/BRAS and policy control equipment.After this when carrying out the offload business, BNG/BRAS just can judge whether it is the offload data message according to whether comprising described CPE IP address in data message.If so, BNG/BRAS just can control for described offload data message carries out resource to the policy control device request.

Based on above-mentioned thought, a kind of method that this locality unloading data are carried out resource control that the embodiment of the present invention provides as shown in Figure 7, mainly comprises:

Step 701 after L-GW receives and triggers message, is controlled function (BPCF, Broadband Policy Control Function) to broadband policy and is sent the request of control of admitting.

Described triggering message can be for from resource allocation request, the service request of UE side or come the carrying operation requests of automatic network.

Step 702, BPCF admits control, returns to L-GW and admit to control result, and control result when accepting admitting, and issues control strategy to BNG/BRAS, comprises at least CPE IP address and mandate QoS information in control strategy.

Step 703, L-GW is according to admitting the control result to carry operation; BNG/BRAS carries out resource to the data message that adopts this CPE IP address encapsulation according to this mandate QoS information and controls according to this CPEIP address filtering data message.

Wherein, L-GW carries operation according to admittance control result and is specially: be to refuse if result is controlled in admittance, the L-GW refusal carries and sets up or retouching operation; If admitting and controlling result is to accept, L-GW initiation carrying is set up or retouching operation.

In addition, before L-GW received to trigger message, the method also comprises: BPCF and L-GW set up the first policy control session, and BPCF obtains CPE IP address; BPCF is according to this CPE IP address discovery BNG/BRAS, set up and BNG/BRAS between the second policy control session.

Wherein, described the first policy control session can be the policy control session of directly setting up between BPCF and L-GW; Accordingly, L-GW is according to CPE IP address discovery BPCF, and sets up the first policy control session.

Described the first policy control session also can be comprised of the policy control session of setting up between the policy control session of setting up between L-GW and PCRF and PCRF and BPCF;

Accordingly, L-GW is according to LHN-ID or CPE IP address discovery PCRF, and the policy control session between foundation and PCRF; PCRF is according to CPE IP address discovery BPCF, and the policy control session between foundation and BPCF.

The corresponding above-mentioned method that this locality unloading data are carried out resource control, embodiments of the invention also provide a kind of this locality unloading data have been carried out the system that resource is controlled, and mainly comprise: L-GW, BPCF, BNG/BRAS.Wherein, after L-GW is used for receiving triggering message, send to BPCF the request of control of admitting; Carry operation according to admitting the control result.BPCF is used for admitting control, returns to admit to L-GW and controls result, and control result when accepting admitting, and issues control strategy to BNG/BRAS, comprises at least CPE IP address and mandate QoS information in control strategy.BNG/BRAS is used for according to CPE IP address filtering data message, and the data message that adopts CPE IP address encapsulation is controlled according to authorizing QoS information to carry out resource.

Better, L-GW can be further used for, when admitting the control result for refusal, and refusal carrying foundation or retouching operation; Admit controlling result when accepting, initiate carrying foundation or retouching operation.

Better, BPCF can be further used for, and before L-GW received to trigger message, BPCF and L-GW set up the first policy control session, and BPCF obtains CPE IP address; BPCF is according to this CPE IP address discovery BNG/BRAS, set up and BNG/BRAS between the second policy control session.

The below carries out to this locality unloading data the method and system further description that resource is controlled to above-mentioned more in conjunction with specific embodiments.

The scene that embodiments of the invention one are described is that the HeNB system is by RG, BBF network insertion EPC.RG is the devices allocation private network IP address by its access.The offload business that UE by the HeNB system access carries out is carried out the implementation procedure that resource is controlled, and as shown in Figure 8, this process mainly comprises:

Step 801, L-GW powers on, and carries out the access authentication of fixed network, RG, the access authentication procedure when fixed network aaa server participation L-GW powers on.

Step 802, the access authentication of carrying out fixed network as L-GW by the time, RG is that L-GW distributes local private network IP address-1.

Step 803, L-GW utilizes private network IP address and the SeGW that RG distributes to complete the IKEv2 negotiation, sets up ipsec tunnel.When the IKEv2 message of L-GW transmission was passed through RG, RG converted the local private network IP address-1 of L-GW to CPE IP address and port (collection)-1.

Step 804, SeGW is the IP core network address that L-GW distributes L-GW, and sends to L-GW.Simultaneously by expansion IKEv2 message, the CPE IP address after SeGW will change through NAT sends to L-GW.

Step 805, L-GW utilizes CPE IP address information and/or FQDN to find to control the BPCF that L-GW accesses the fixed network line resource that uses, and initiates the first policy control session and set up request, comprises described CPE IP address information and/or FQDN in request message.

Step 806, BPCF finds that according to CPE IP address information and/or FQDN L-GW accesses the BNG/BRAS on the fixed network circuit that uses, and sets up the second policy control session after receiving described the first policy control session foundation request.Simultaneously, BPCF obtains the signing QoS information that L-GW accesses the fixed network circuit that uses, and this information is admitted the foundation of control as follow-up resource request to the offload business.

Step 807, BPCF returns to L-GW the response that the first policy control is successfully established.

Step 808, in a comparable manner, HeNB obtains local private network IP address-2, and and SeGW between consult to set up ipsec tunnel.

Step 809 is that UE is linked into the HeNB network, in order to carry out the offload business, sets up the process that PDN connects, the process that its flow process is shown in Figure 4.

Step 810, when setting up after PDN connects, it is that the local private network IP address-3 of its distribution just can be carried out the offload business that UE utilizes RG.UE is to the L-GW initiating business request, and described request message sends to L-GW through HeNB, perhaps sends to L-GW through HeNB, MME, S-GW.

Step 811 after L-GW receives described service request, initiates to admit to BPCF the request of control, and the QoS information that comprises in request message with described traffic aided is controlled in described admittance.

Step 812, BPCF admits control to described business, carries out demand to QoS if the resource on the fixed network circuit that L-GW access is used can satisfy described business, admits described request.

Step 813, BPCF returns to L-GW and admits successful response.

Step 814, L-GW initiates to carry the operation of foundation/modification accordingly.

Step 815, BPCF issues control strategy to BNG/BRAS simultaneously, comprises CPE IP address and authorizes QoS information.When data message process BNG/BRAS, if BNG/BRAS according to the data message of CPE IP address filtering to correspondence, is indicated as the data message of offload business, according to described mandate QoS information, the offload data are controlled.

The scene that embodiments of the invention two are described is identical with embodiment one, distinguishes the foundation that is the first policy control session and is set up by PCRF and BPCF by L-GW.Its flow process mainly comprises as shown in Figure 9:

Step 901, L-GW powers on and carries out the access authentication of fixed network, obtains local private network IP address, and the process that CPE IP address was set up and obtained to ipsec tunnel is identical with embodiment one, referring to step 801～804.

Step 902, L-GW is according to LHN-ID or CPE IP address discovery PCRF, and initiates policy control session A to PCRF and set up request, comprises LHN-ID, CPE IP address and/or FQDN in request message.

Step 903, after PCRF receives described policy control session A foundation request, control according to CPE IP address information and/or FQDN INFORMATION DISCOVERY the BPCF that L-GW accesses the fixed network line resource that uses, and initiate the foundation request of policy control session B, comprise CPE IP address and/or FQDN in request message.

Step 904, after BPCF receives the foundation request of described policy control session B, the BNG/BRAS on the fixed network circuit that uses according to CPE IP address and/or FQDN INFORMATION DISCOVERY L-GW access, and set up the second policy control session.Simultaneously, BPCF obtains the signing QoS information that L-GW accesses the fixed network circuit that uses, and this information admits as the follow-up offload business is carried out the foundation of controlling.

Step 905, BPCF returns to PCRF the response that policy control session B is successfully established.

Step 906, PCRF returns to L-GW the response that policy control session A is successfully established.

Step 907 in the same way, is set up ipsec tunnel between HeNB and SeGW.

Step 908 is that UE is linked into the HeNB network, in order to carry out the offload business, sets up the process that PDN connects, the process that its flow process is shown in Figure 4.

Step 909, when setting up after PDN connects, it is that the local private network IP address-3 of its distribution just can be carried out the offload business that UE utilizes RG.UE is to the L-GW initiating business request, and described request message sends to L-GW through HeNB, perhaps sends to L-GW through HeNB, MME, S-GW.

Step 910 after L-GW receives described service request, is initiated to admit the request of control to PCRF, comprises the QoS information with described traffic aided in request message.

Step 911, PCRF initiates to admit to BPCF the request of control.

Step 912, BPCF admits control to described business, carries out demand to QoS if the resource on the fixed network circuit that L-GW access is used can satisfy described business, admits described request.

Step 913, BPCF returns to PCRF and admits successful response.

Step 914, PCRF returns to L-GW and admits successful response.

Step 915, L-GW initiates to carry the operation of foundation/modification accordingly.

Step 916, BPCF issues control strategy to BNG/BRAS simultaneously, comprises CPE IP address and authorizes QoS information.When data message process BNG/BRAS, if BNG/BRAS according to the data message of CPE IP address filtering to correspondence, is indicated as the data message of offload business, according to described mandate QoS information, the offload data are controlled.

Need to prove, in the present embodiment, L-GW and PCRF Establishment strategy are controlled session A, and when UE was carried out the offload business, PCRF did not do strategic decision-making and admits and control follow-up, control request to BPCF but forward from the admittance of L-GW, and the admittance of forwarding BPCF is controlled result to L-GW.But, if PCRF is the network element that is deployed in the HeNB system, be the Internet resources of concrete management HeNB internal system, when PCRF receives step 910 from the resource authorization request of L-GW, can carry out resource authorization to described request, and will authorize QoS information to send to BPCF to admit control, and controlling result according to the admittance of BPCF, PCRF can decision-making issue to L-GW the QoS information of authorizing.

The scene that embodiments of the invention three are described is identical with embodiment one, when difference is that UE that process that policy control session is set up occurs in access HeNB sets up PDN and connects.Its flow process mainly comprises as shown in figure 10:

The process that 1001, L-GW powers on is referring to the step 801 in Fig. 8～804.

1002, L-GW initiates DNS to the dns server that is positioned at core network and upgrades, and L-GW IP core network address, the information such as LHN-ID, APN are sent to dns server.

1003, HeNB powers on to complete with the ipsec tunnel of SeGW and sets up.

1004, UE initiates PDN and connects the request of foundation, comprises the information such as UE-ID, APN in request message.Wherein, APN information has indicated the UE request to set up the PDN connection that is used for offload.When request message arrived HeNB, HeNB was included in the LHN-ID of HeNB network under self and sends to MME in request message.

1005, after MME receives that request message is set up in described connection, at first judge whether to allow UE to set up PDN according to APN information and connect, if allow, the L-GW that serves for UE to the dns server inquiry according to LHN-ID.

1006, DNS inquires corresponding L-GW according to LHN-ID, and the information of L-GW information such as (comprise L-GW IP core network) addresses is returned to MME.

1007, MME sends the session establishment request with backward S-GW, comprises L-GW IP core network address in request message.

1008, S-GW sets up request according to L-GW IP core network address to the L-GW initiation session.

After 1009, L-GW receives described session establishment request, find BPCF according to CPE IP address and/or FQDN, and initiate the first policy control session and set up request, comprise this CPE IP address in request message.

1010, BPCF finds that according to CPE IP address and/or FQDN L-GW accesses the BNG/BRAS on the fixed network circuit that uses, and sets up the second policy control session after receiving described the first policy control session foundation request.Simultaneously, BPCF obtains the signing QoS information that L-GW accesses the fixed network circuit that uses, and this information is admitted the foundation of control as follow-up resource request to the offload business.

1011, BPCF returns to L-GW the response that the first policy control is successfully established.

1012, L-GW returns to the session establishment response to S-GW.Comprise the information such as TEID that L-GW produces, UE IP address, the local private network IP address-1 of L-GW in response message.

The subsequent step that 1013, PDN connect to set up comprises that Sxx connects to set up the process request referring to the description of the step 411 in Fig. 4～416.

1014, UE just can carry out the offload business after setting up the PDN connection.The process that in the process of commencing business, BPCF execution admittance is controlled and other processes are referring to the step 810 in Fig. 8～815.

Need to prove, embodiments of the invention one to embodiment three are described is all that CPE IP address is sent to BNG/BRAS, BNG/BRAS is according to CPE IP address filtering data message, just is considered to the offload data message if data message adopts CPE IP address to encapsulate.But, if RG except the access of HeNB system, can also supply other users (for example fixed network user) access.When the data message that described other users send passed through RG, its local private network IP address also was converted into CPE IP address.At this moment, it is that other resource of RG level is controlled that the resource that BNG/BRAS provides according to described CPE IP address is controlled, and other users' accesses that namely are included as below RG provide resource to control, and for fear of this situation, RG can be configured to specialize in the HeNB system access and use.

Also have another kind of scheme to be, when L-GW powers on when carrying out the access authentication of fixed network, RG as authenticating party, is that L-GW distributes private network IP address, and CPE IP address and port numbers collection after RG turns corresponding NAT simultaneously send to BNG/BRAS.When described port numbers collection is carried out the offload business by the UE under the HeNB system access, data message carries out using after the NAT conversion through RG.At this moment, BNG/BRAS filters according to CPE IP address and described port numbers set pair message, if data message adopts CPE IP address encapsulation, and the port numbers of using also belongs to the scope of described port numbers collection, described message is the offload data message, controls thereby it is carried out resource; And if although data message adopts CPE IP address encapsulation, the port numbers that adopts does not belong to the scope of described port numbers collection, this data message is not the offload data message, BNG/BRAS will not carry out resource to this data message and control.So just can realize other resource control of L-GW level.

Need to prove, the present invention program and all embodiment have only illustrated that the policy control that UE access HeNB system carries out the offload business realizes, its all implementations also can be used in the HNB system.

In sum, by the above embodiment of the present invention, solve the resource control problem that the UE that accesses by HeNB carries out the offload business, made the offload business that UE carries out also can obtain the QoS assurance.

obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with general calculation element, they can concentrate on single calculation element, perhaps be distributed on the network that a plurality of calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in storage device and be carried out by calculation element, and in some cases, can carry out step shown or that describe with the order that is different from herein, perhaps they are made into respectively each integrated circuit modules, perhaps a plurality of modules in them or step being made into the single integrated circuit module realizes.Like this, the present invention is not restricted to any specific hardware and software combination.

The above is only preferred embodiment of the present invention, is not for limiting protection scope of the present invention.

Claims

1. one kind is carried out to this locality unloading data the method that resource is controlled, and it is characterized in that, the method comprises:

After local gateway L-GW receives and triggers message, control function BPCF to broadband policy and send the request of control of admitting;

Described BPCF admits control, return to admit to described L-GW and control result, and control result when accepting in described admittance, issue control strategy to wideband network gateway/Broadband Remote Access Server BNG/BRAS, comprise at least customer premises equipment, CPE procotol CPE IP address and authorization service quality Q oS information in described control strategy.

2. according to claim 1 this locality unloading data are carried out the method that resource is controlled, it is characterized in that, return to admittance control result to described L-GW after, the method further comprises:

Described L-GW is according to admitting the control result to carry operation.

3. according to claim 1 this locality unloading data are carried out the method that resource is controlled, it is characterized in that, after BNG/BRAS issues control strategy, the method further comprises:

Described BNG/BRAS carries out resource to the data message that adopts described CPE IP address encapsulation according to described mandate QoS information and controls according to described CPE IP address filtering data message.

4. according to claim 1 unloading data in this locality are carried out the method that resource is controlled, it is characterized in that, described triggering message is for from resource allocation request, the service request of user equipment (UE) side or come the carrying operation requests of automatic network.

5. according to claim 2 this locality unloading data are carried out the method that resource is controlled, it is characterized in that, described L-GW is specially according to admitting the control result to carry operation:

6. the described method that this locality unloading data are carried out resource control of according to claim 1 to 5 any one, is characterized in that, before described L-GW received to trigger message, the method further comprised:

Described BPCF and L-GW set up the first policy control session, and BPCF obtains described CPE IP address;

Described BPCF is according to the described BNG/BRAS of described CPE IP address discovery, set up and described BNG/BRAS between the second policy control session.

7. according to claim 6 this locality unloading data are carried out the method that resource is controlled, it is characterized in that, described the first policy control session is the policy control session of directly setting up between described BPCF and L-GW;

Accordingly, described L-GW is according to the described BPCF of described CPE IP address discovery, and sets up described the first policy control session.

8. according to claim 6 this locality unloading data are carried out the method that resource is controlled, it is characterized in that, described the first policy control session is comprised of the policy control session of setting up between the policy control session of setting up between L-GW and "Policy and Charging Rules Function PCRF and PCRF and BPCF;

Accordingly, described L-GW is according to LHN-ID or the described PCRF of CPE IP address discovery, and the policy control session between foundation and described PCRF; Described PCRF is according to the described BPCF of described CPE IP address discovery, and the policy control session between foundation and described BPCF.

9. one kind is carried out to this locality unloading data the system that resource is controlled, and it is characterized in that, this system comprises: local gateway L-GW, broadband policy are controlled function BPCF, wideband network gateway/Broadband Remote Access Server BNG/BRAS, wherein,

10. according to claim 9 this locality unloading data are carried out the system that resource is controlled, it is characterized in that, described L-GW is further used for, according to admitting the control result to carry operation.

11. according to claim 9 this locality unloading data are carried out the system that resource is controlled, it is characterized in that, described BNG/BRAS is further used for, according to described CPE IP address filtering data message, the data message that adopts described CPE IP address encapsulation is carried out resource according to described mandate QoS information control.

12. according to claim 9 unloading data in this locality are carried out the system that resource is controlled, it is characterized in that, described triggering message is for from resource allocation request, the service request of user equipment (UE) side or come the carrying operation requests of automatic network.

13. according to claim 10 this locality unloading data are carried out the system that resource is controlled, it is characterized in that, described L-GW is further used for, and when result was controlled in described admittance for refusal, the refusal carrying was set up or retouching operation; Control result when accepting in described admittance, initiate carrying foundation or retouching operation.

14. the described system that this locality unloading data are carried out resource control of according to claim 9 to 13 any one, it is characterized in that, described BPCF is further used for, before described L-GW receives triggering message, described BPCF and L-GW set up the first policy control session, and BPCF obtains described CPE IP address; Described BPCF is according to the described BNG/BRAS of described CPE IP address discovery, set up and described BNG/BRAS between the second policy control session.

15. the described system that this locality unloading data are carried out resource control, is characterized in that according to claim 14, described the first policy control session is the policy control session of directly setting up between described BPCF and L-GW;

16. described according to claim 14 unloading data in this locality are carried out the system that resource is controlled, it is characterized in that, described the first policy control session is comprised of the policy control session of setting up between the policy control session of setting up between L-GW and "Policy and Charging Rules Function PCRF and PCRF and BPCF;