CN102904856A - Method and device for controlling shared session - Google Patents
Method and device for controlling shared session Download PDFInfo
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- CN102904856A CN102904856A CN2011102090225A CN201110209022A CN102904856A CN 102904856 A CN102904856 A CN 102904856A CN 2011102090225 A CN2011102090225 A CN 2011102090225A CN 201110209022 A CN201110209022 A CN 201110209022A CN 102904856 A CN102904856 A CN 102904856A
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Abstract
The invention discloses a method for controlling a shared session. The method includes that UE (user equipment) supports direct distribution via a non-3GPP (3rd generation partnership project) network and simultaneously accesses a 3GPP core network; and a strategy control functional entity determines whether the shared session needs to be deleted or not according to whether the UE has service distribution ability or not when the last PDN (public data network) accessing the 3GPP core network is deleted. The invention further provides the strategy control functional entity. According to the technical scheme, the method and the strategy control functional entity have the advantage that a gap of a scheme for processing a shared session for UE via WLAN (wireless local area network) in a scene that direct service distribution is supported and a core network is accessed in the prior art is filled.
Description
Technical field
The present invention relates to moving communicating field, relate in particular to a kind of control method and device of shared session.
Background technology
Third generation partner program (3GPP, grouping system (the EPS of evolution 3rd Generation Partnership Project), Evolved Packet System) by the Universal Terrestrial Radio Access Network (E-UTRAN of evolution, Evolved Universal Terrestrial Radio Access Network), mobile management unit (MME, Mobility Management Entity), gateway (S-GW, Serving Gateway), grouped data network gateway (P-GW, Packet Data Network Gateway) and home subscriber server (HSS, Home Subscriber Server) form.
Fig. 1 is the structural representation of the system of 3GPP network and non-3GPP network interworking in the prior art, as shown in Figure 1, the intercommunication of EPS support and non-3 GPP system is by the S2a/S2b/S2c Interface realization, and wherein P-GW is 3GPP network and the internetwork anchor point of non-3GPP.In the system architecture of EPS, non-3GPP network insertion is divided into trustless non-3GPP access and the non-3GPP access of trusted; Wherein, trustless non-3GPP access needs to link to each other with P-GW through the packet data gateway (ePDG, Evolved Packet Data Gateway) of evolution, and the interface between ePDG and P-GW is the S2b interface; The non-3GPP access of trusted can directly be connected with P-GW by the S2a interface, and the S2a interface adopts proxy-mobile IP (Proxy Mobile IP, PMIP) agreement to carry out information interaction; In addition, the S2c interface provides subscriber equipment (UE, User Equipment) with P-GW between relevant control and the mobility support of user's face, the mobility management protocol of its support is for supporting the mobile IP v 6 (DSMIPv6 of two stacks, Moblie IPv6 Support for Dual Stack Hosts and Routers), it can be used for trustless non-3GPP and the non-3GPP access of trusted.
WLAN (WLAN, Wireless Local Area Network) can be used as non-3 GPP system access EPS, this relates to the interconnection and interflow problem of the fixed network mobile fusion (FMC, Fixed Mobile Convergence) of a lot of operators concern.
In the second stage of FMC problem, FMC mainly studies the problem relevant with service distributing.Because the diversity demand of customer service, the user can access multiple business simultaneously, and these professional resource requirements are different; If all terminals all are linked into the core net of 3GPP by WLAN or 3GPP connecting system, not only increased the data traffic load of core net, and limited Internet resources are seized in multiple business, possibly can't guarantee the quality to the high business of qos requirement, (do one's best such as BE such as internet, Best Effort) business, these business are not very high to qos requirement, and voice etc. are professional very high to qos requirement, above two class business have obtained same bandwidth, such bandwidth is enough concerning the BE business, but possibly can't satisfy the requirement of the business such as voice, causes professional transmission quality extreme difference even the service fails such as voice.
Therefore, when UE accessed EPS by WLAN, adopting effectively to business, shunting was necessary.Fig. 2 is the schematic network structure that UE carries out service distributing and EPS simultaneously in the prior art by WLAN, as shown in Figure 2, take the S2b interface as example, operator can be according to the feature of business, allow partial service transmit by EPS, and a part professional (professional such as internet) can be directly from the WLAN shunting, to reduce the traffic load of 3GPP core net in addition.
Under the trend that the FMC framework degree of depth merges, when UE directly carries out service distributing by WLAN, the policy control server of 3GPP network or accounting server still can issue the specific strategy decision-making relevant with UE or charging is made a strategic decision to fixed network for UE, carry out policy control or charging etc. such as the concrete type of service for certain UE; The network element of fixed network can be carried out the policy control relevant with concrete UE or the collection of charge information after receiving the charging decision-making of the strategic decision-making of policy control server or accounting server.
At present, by WLAN access EPS and be positioned under the direct writing shunting scene, service distributing strategy and EPS strategy may be shared a S9* session, when UE roams, also can share the S9 session at UE.Delete the relevant bearer resource of itself and EPS as UE, but still when carrying out service distributing, need to consider the deletion problem of both shared sessions, such as S9* session and S9 session, but in the prior art, also not have open relevant solution.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of control method and device of shared session, remedies in the prior art UE by WLAN, supports the direct writing shunting and simultaneously under the scene of core network access, shares the blank of the processing scheme of session.
For achieving the above object, technical scheme of the present invention is achieved in that
The invention provides a kind of control method of shared session, comprising:
UE supports directly to shunt and access simultaneously the core net of 3GPP by non-3GPP network, and when last PDN of deletion access 3GPP core net connected, whether the policy control functions entity had the service distributing ability according to UE, determines whether to delete shared session.
In the said method, described policy control functions entity is PCRF or visited place PCRF (vPCRF) or ownership place PCRF (hPCRF).
In the said method, the acquisition methods whether described UE has the service distributing ability is: AAA or HSS be by in the access authentication message based on 3GPP, carries and indicate the whether information of supporting business shunting ability of UE, and pass to UE by the fixed network network element; The network element of non-3GPP network is by UE or directly in the access authentication message based on 3GPP, obtains the whether information of supporting business shunting ability of UE of indicating; The policy control functions entity obtains the service distributing ability of UE from the network element of non-3GPP network.
In the said method, whether described policy control functions entity has the service distributing ability according to UE, determines that whether deleting shared session is:
When UE had the service distributing ability, the policy control functions entity was not deleted shared session, when UE does not have the service distributing ability, and the session that the deletion of policy control functions entity is shared.
In the said method, described policy control functions entity is not deleted shared session and is:
In the UE attachment flow, the network element of fixed network triggers BPCF and sets up the S9* session, and BPCF sends S9* session establishment request message to PCRF, sets up the S9* session, carries the service distributing ability of UE in the message;
UE initiates the connection building process of a plurality of PDN;
When the PDN that goes to connect connected for last PDN, if having interface between ePDG and the PCRF, ePDG sent the gateway control session termination messages to PCRF; After PCRF received the gateway control session termination messages, if UE has the service distributing ability, PCRF did not initiate to delete the flow process of S9* session.
In the said method, the method also comprises:
If there is not interface between ePDG and the PCRF, UE or ePDG send the message of releasing bearing to PDN GW, after PDN GW receives the message of releasing bearing, send IP-CAN session termination message to PCRF, after PCRF receives IP-CAN session termination message, if UE has the service distributing ability, PCRF does not initiate to delete the flow process of S9* session.
In the said method, described policy control functions entity is not deleted shared session and is:
In the UE attachment flow, the network element of fixed network triggers BPCF and sets up the S9* session, and BPCF sends S9* session establishment request message to vPCRF, sets up the S9* session, carries the service distributing ability of UE in the message;
UE initiates the connection building process of a plurality of PDN;
When the PDN that goes to connect connects for last PDN, if have interface between ePDG and the vPCRF, ePDG sends the gateway control session termination messages to vPCRF, after vPCRF receives the gateway control session termination messages, if UE has the service distributing ability, vPCRF does not initiate to delete the flow process of S9* session.
In the said method, the method also comprises:
If there is not interface between ePDG and the vPCRF, UE or ePDG send the message of releasing bearing to PDN GW, receive the message of releasing bearing after, PDN GW sends IP-CAN session termination message to vPCRF; After vPCRF received IP-CAN session termination message, if UE has the service distributing ability, vPCRF did not initiate to delete the flow process of S9* session.
In the said method,
Described BPCF sends S9* session establishment request message to vPCRF, sets up after the S9* session, and the method also comprises: vPCRF sends S9 session establishment request message to hPCRF, sets up the S9 session;
The method also comprises: vPCRF does not initiate to delete the flow process of S9 session.
In the said method, described policy control functions entity is not deleted shared session and is:
In the UE attachment flow, the network element of fixed network triggers BPCF and sets up the S9* session, and BPCF sends S9* session establishment request message to vPCRF, sets up the S9* session, carries the service distributing ability of UE in the message; VPCRF sends S9 session establishment request message to hPCRF, sets up the S9 session; UE initiates the connection building process of a plurality of PDN;
When the PDN that goes to connect connects for last PDN, if have interface between ePDG and the vPCRF, ePDG sends the gateway control session termination messages to vPCRF, after vPCRF receives the gateway control session termination messages, sends S9 session termination request message to hPCRF; After hPCRF received S9 session termination request message, if UE has the service distributing ability, hPCRF did not initiate to delete the flow process of S9* session and S9 session.
In the said method, the method also comprises:
HPCRF sends S9 session termination response message to vPCRF, carries the information of refusal deletion S9* session and S9 session.
In the said method, the method also comprises:
If there is not interface between ePDG and the vPCRF, UE or ePDG send the message of releasing bearing to PDN GW, after receiving the message of releasing bearing, PDN GW sends IP-CAN session termination message to hPCRF, after hPCRF receives IP-CAN session termination message, if UE has the service distributing ability, hPCRF does not initiate to delete the flow process of S9* session and S9 session.
The present invention also provides a kind of policy control functions entity, comprising: judge module and decision-making module; Wherein,
Judge module is used for UE by non-3GPP network, supports directly to shunt and access simultaneously the core net of 3GPP, when last PDN of deletion access 3GPP core net connects, judges whether UE has the service distributing ability;
Decision-making module, the judged result for whether UE being had the service distributing ability according to judge module determines whether to delete shared session.
In the above-mentioned policy control functions entity, described policy control functions entity is PCRF or vPCRF or hPCRF.
The control method of shared session provided by the invention and device, UE is by non-3GPP network, support directly to shunt and access simultaneously the core net of 3GPP, when last PDN of deletion access 3GPP core net connects, whether the policy control functions entity has the service distributing ability according to UE, determines whether to delete shared session, remedies that UE passes through WLAN in the prior art, support to share the blank of the processing scheme of session under the scene of direct writing shunting and while core network access.
Description of drawings
Fig. 1 is the structural representation of the system of 3GPP network and non-3GPP network interworking in the prior art;
Fig. 2 is the schematic network structure that UE carries out service distributing and EPS simultaneously in the prior art by WLAN;
Fig. 3 is the schematic flow sheet of the embodiment one of the present invention's control method of realizing sharing session;
Fig. 4 is the schematic flow sheet of the embodiment two of the present invention's control method of realizing sharing session;
Fig. 5 is the schematic flow sheet of the embodiment three of the present invention's control method of realizing sharing session;
Fig. 6 is the structural representation of policy control functions entity of the present invention.
Embodiment
Basic thought of the present invention is: UE is by non-3GPP network, support directly to shunt and access simultaneously the core net of 3GPP, when last PDN of deletion access 3GPP core net connected, whether the policy control functions entity had the service distributing ability according to UE, determines whether to delete shared session.
Below by drawings and the specific embodiments the present invention is described in further detail again.
The invention provides a kind of control method of shared session, the method comprises:
UE supports directly to shunt and access simultaneously the core net of 3GPP by non-3GPP network, and when last PDN of deletion access 3GPP core net connected, whether the policy control functions entity had the service distributing ability according to UE, determines whether to delete shared session.
Wherein, non-3GPP network is wlan network; Access under the scene non-roamingly, the policy control functions entity is PCRF, under the roaming place access scene, the policy control functions entity is visited place PCRF (vPCRF, Visited PCRF), under the ownership place access scene, the policy control functions entity is ownership place PCRF (hPCRF, Home PCRF).
Wherein, the acquisition methods whether described UE has a service distributing ability can be AAA or HSS in the access authentication message based on 3GPP, carry and indicate the whether information of supporting business shunting ability of UE, and pass to UE by the fixed network network element; The network element of non-3GPP network can be by UE or directly in the access authentication message based on 3GPP, obtain the whether information of supporting business shunting ability of UE of indicating, further, the policy control functions entity can obtain from the network element of non-3GPP network the service distributing ability of UE.
Wherein, when UE had the service distributing ability, the policy control functions entity was not deleted shared session, when UE does not have the service distributing ability, and the session that the deletion of policy control functions entity is shared; Described shared session is S9* session and S9 session; Access under the scene, the session of sharing comprises the S9* session non-roamingly, and under the roaming place access scene, the session of sharing comprises the S9* session, can also comprise the S9 session, and under the ownership place access scene, the session of sharing comprises S9* session and S9 session.
Following embodiment is that UE is at last the packet data network (PDN that carries out deletion access 3GPP core net, when Packet Data Netowrok) connecting flow process, because the S9* session is the session that service distributing strategy and EPS strategy share, when PCRF determines that UE has the service distributing ability, do not initiate the deletion flow process of S9* session, optionally, can also not initiate the deletion flow process of S9 session.
Embodiment one
Fig. 3 is the schematic flow sheet of the embodiment one of the present invention's control method of realizing sharing session, under the right and wrong roaming place access scene, when UE connects flow process at last PDN that carries out deletion access 3GPP core net, when PCRF has the service distributing ability at definite UE, do not delete the concrete methods of realizing of shared session, as shown in Figure 3, the method may further comprise the steps:
Step 301, UE carries out the access authentication flow process based on 3GPP, and the network element of fixed network is that UE distributes local ip address.
Step 302, in the UE attachment flow, the network element of fixed network sends message to BPCF, is used for triggering BPCF and sets up the S9* session.
Step 303 after BPCF is subject to the triggering of network element of fixed network, sends S9* session establishment request message to PCRF, is used for setting up the S9* session; Carry the service distributing ability of UE in the message, PCRF can know whether UE has the service distributing ability according to S9* session establishment request message; Wherein, BPCF can obtain by BNG/BRAS the service distributing ability of UE, and BNG/BRAS is by UE or directly obtain the service distributing ability of UE in the access authentication flow process based on 3GPP, and UE is in the service distributing ability of obtaining self from the access authentication flow process based on 3GPP.
Step 304 is carried out IKEv2 authentication and building tunnel, and UE or fixed network or ePDG and core net are set up the session flow process.
Step 305, UE initiates the connection building process of a plurality of PDN.
The PDN that initiates as UE or ePDG or HSS or AAA go to connect flow process the time, and as PDN during for last PDN connection, the present embodiment is further comprising the steps of:
Step 306 if there is ePDG, then can be carried out the IKEv2 tunnel and discharge flow process between UE and the ePDG.
Here, if having interface between ePDG and the PCRF, execution in step 307～step 309, if there is not interface between ePDG and the PCRF, direct execution in step 309 and step 310:
Step 307, if having interface between ePDG and the PCRF, then ePDG sends the gateway control session termination messages to PCRF, PCRF replys gateway control session to ePDG and stops response message when receiving gateway session termination message.
Step 308 after PCRF receives the gateway control session termination messages, judges whether UE has the service distributing ability, if UE has the service distributing ability, PCRF does not initiate to delete the flow process of S9* session.
Step 309, UE or ePDG send the message of releasing bearing to PDN GW, be used to indicate PDN GW deletion session, receive the message of releasing bearing after, PDN GW sends IP-CAN session termination message to PCRF; Wherein, the message of releasing bearing can be BU message or PBU or GTP message; PCRF replys the response message of IP-CAN session termination message to PDNGW after receiving IP-CAN session termination message.
Step 310 after PCRF receives IP-CAN session termination message, judges whether UE has the service distributing ability, if UE has the service distributing ability, PCRF does not initiate to delete the flow process of S9* session.
Embodiment two
Fig. 4 is the schematic flow sheet of the embodiment two of the present invention's control method of realizing sharing session, under the roaming place access scene, when UE connects flow process at last PDN that carries out deletion access 3GPP core net, when PCRF has the service distributing ability at definite UE, do not delete the concrete methods of realizing of shared session; For roaming place access scene, application function (AF, Application Function) is positioned at the roaming place, need to consider the deletion of the S9* session between BPCF and the vPCRF, if need to be with reference to the strategic decision-making of ownership place, also can set up the S9 session, also need to consider the deletion of the S9 session between vPCRF and the hPCRF; As shown in Figure 4, the method may further comprise the steps:
Step 401, UE carries out the access authentication flow process based on 3GPP, and the network element of fixed network is that UE distributes local ip address.
Step 402, in the UE attachment flow, the network element of fixed network sends message to BPCF, is used for triggering BPCF and sets up the S9* session.
Step 403 after BPCF is subject to the triggering of network element of fixed network, sends S9* session establishment request message to vPCRF, is used for setting up the S9* session; Carry the service distributing ability of UE in the message, vPCRF can know whether UE has the service distributing ability according to S9* session establishment request message; Wherein, BPCF can obtain by BNG/BRAS the service distributing ability of UE, and BNG/BRAS is by UE or directly obtain the service distributing ability of UE in the access authentication flow process based on 3GPP, and UE is in the service distributing ability of obtaining self from the access authentication flow process based on 3GPP; Here, optional, vPCRF can also send S9 session establishment request message to hPCRF, sets up the S9 session, and S9 session establishment request message is used for consulting to ownership place mobile network request strategy.
Step 404 is carried out IKEv2 authentication and building tunnel, and UE or fixed network or ePDG and core net are set up the session flow process.
Step 405, UE initiates the connection building process of a plurality of PDN.
The PDN that initiates as UE or ePDG or HSS or AAA go to connect flow process the time, and as PDN during for last PDN connection, the present embodiment is further comprising the steps of:
Step 406 if there is ePDG, then can be carried out the IKEv2 tunnel and discharge flow process between UE and the ePDG.
Here, if having interface between ePDG and the vPCRF, execution in step 407～step 409, if there is not interface between ePDG and the vPCRF, direct execution in step 409 and step 410:
Step 407, if having interface between ePDG and the vPCRF, then ePDG sends the gateway control session termination messages to vPCRF, vPCRF replys gateway control session to ePDG and stops response message when receiving gateway session termination message.
Step 408 after vPCRF receives the gateway control session termination messages, judges whether UE has the service distributing ability, if UE has the service distributing ability, vPCRF does not initiate to delete the S9* session, if the S9 session has been set up in the front, vPCRF does not initiate to delete the flow process of S9 session equally.
Step 409, UE or ePDG send the message of releasing bearing to PDN GW, be used to indicate PDN GW deletion session, receive the message of releasing bearing after, PDN GW sends IP-CAN session termination message to vPCRF; Wherein, the message of releasing bearing can be BU message or PBU or GTP message; VPCRF replys the response message of IP-CAN session termination message to PDNGW after receiving IP-CAN session termination message.
Step 410 after vPCRF receives IP-CAN session termination message, judges whether UE has the service distributing ability, if this UE has the service distributing ability, PCRF does not initiate to delete the flow process of S9* session, if the S9 session has been set up in the front, vPCRF does not initiate to delete the flow process of S9 session equally.
Embodiment three
Fig. 5 is the schematic flow sheet of the embodiment three of the present invention's control method of realizing sharing session, under the ownership place access scene, when UE connects flow process at last PDN that carries out deletion access 3GPP core net, when PCRF has the service distributing ability at definite UE, do not delete the concrete methods of realizing of shared session; For ownership place access scene, AF is positioned at ownership place, the deletion of the S9 session between deletion, vPCRF and the hPCRF of the S9* session between needs consideration BPCF and the vPCRF; As shown in Figure 5, the method may further comprise the steps:
Step 501, UE carries out the access authentication flow process based on 3GPP, and the network element of fixed network is that UE distributes local ip address.
Step 502, in the UE attachment flow, the network element of fixed network sends message to BPCF, is used for triggering BPCF and sets up the S9* session.
Step 503 after BPCF is subject to the triggering of network element of fixed network, sends S9* session establishment request message to vPCRF, is used for setting up the S9* session; Carry the service distributing ability of UE in the message, vPCRF can know whether UE has the service distributing ability according to S9* session establishment request message; VPCRF also needs to send S9 session establishment request message to hPCRF, is used for setting up the S9 session; Wherein, BPCF can obtain by BNG/BRAS the service distributing ability of UE, and BNG/BRAS is by UE or directly obtain the service distributing ability of UE in the access authentication flow process based on 3GPP, and UE is in the service distributing ability of obtaining self from the access authentication flow process based on 3GPP.
Step 504 is carried out IKEv2 authentication and building tunnel, and UE or fixed network or ePDG and core net are set up the session flow process.
Step 505, UE initiates the connection building process of a plurality of PDN.
The PDN that initiates as UE or ePDG or HSS or AAA go to connect flow process the time, and as PDN during for last PDN connection, the present embodiment is further comprising the steps of:
Step 506 if there is ePDG, then can be carried out the IKEv2 tunnel and discharge flow process between UE and the ePDG.
Here, if having interface between ePDG and the vPCRF, execution in step 507～step 511, if there is not interface between ePDG and the vPCRF, direct execution in step 511 and step 512:
Step 507, if having interface between ePDG and the vPCRF, then ePDG sends the gateway control session termination messages to vPCRF; VPCRF replys gateway control session to ePDG and stops response message when receiving gateway session termination message.
Step 508 after vPCRF receives the gateway control session termination messages, sends S9 session termination request message to hPCRF.
Step 509 after hPCRF receives S9 session termination request message, judges whether UE has the service distributing ability, if UE has the service distributing ability, hPCRF does not initiate to delete the flow process of S9* session and S9 session.
Alternatively, step 510, hPCRF sends S9 session termination response message to vPCRF, carries the information of refusal deletion S9* session and S9 session in the message.
Step 511, UE or ePDG send the message of releasing bearing to PDN GW, be used to indicate PDN GW deletion session, receive the message of releasing bearing after, PDN GW sends IP-CAN session termination message to hPCRF; Wherein, the message of releasing bearing can be BU message or PBU or GTP message; HPCRF replys the response message of IP-CAN session termination message to PDNGW after receiving IP-CAN session termination message.
Step 512 after hPCRF receives IP-CAN session termination message, is judged whether service distributing ability of UE, if UE has the service distributing ability, hPCRF does not initiate to delete the flow process of S9* session and S9 session.
Based on above-described embodiment, when the policy control functions entity determines that UE has the service distributing ability, do not delete the S9* session, optionally, can also not delete the S9 session, may when the network element of fixed network detects UE and rolls off the production line by timer or other modes, just initiate the deletion of S9* session or S9* session and S9 session; Wherein, UE roll off the production line comprise UE do not have for a long time data, outage, UE initiatively initiate to roll off the production line the notice etc.; Operation when network element determines that UE does not have the service distributing ability belongs to prior art, repeats no more here.
For realizing said method, the present invention also provides a kind of policy control functions entity, and Fig. 6 is the structural representation of policy control functions entity of the present invention, and as shown in Figure 6, this device comprises: judge module 61 and decision-making module 62; Wherein,
Decision-making module 62, the judged result for whether have the service distributing ability according to 61 couples of UE of judge module determines whether to delete shared session.
Described policy control functions entity is PCRF or vPCRF or hPCRF.
The acquisition methods whether described UE has the service distributing ability is: AAA or HSS be by in the access authentication message based on 3GPP, carries and indicate the whether information of supporting business shunting ability of UE, and pass to UE by the fixed network network element; The network element of non-3GPP network is by UE or directly in the access authentication message based on 3GPP, obtains the whether information of supporting business shunting ability of UE of indicating; The policy control functions entity obtains the service distributing ability of UE from the network element of non-3GPP network.
Whether described decision-making module 62 has the judged result of service distributing ability according to 61 couples of UE of judge module, determine that whether deleting shared session is specially: when UE has the service distributing ability, do not delete shared session, when UE does not have the service distributing ability, the session that deletion is shared.
Describedly do not delete shared session and be specially:
In the UE attachment flow, the network element of fixed network triggers BPCF and sets up the S9* session, and BPCF sends S9* session establishment request message to PCRF, sets up the S9* session, carries the service distributing ability of UE in the message; UE initiates the connection building process of a plurality of PDN;
When the PDN that goes to connect connected for last PDN, if having interface between ePDG and the PCRF, ePDG sent the gateway control session termination messages to PCRF; After PCRF received the gateway control session termination messages, if UE has the service distributing ability, PCRF did not initiate to delete the flow process of S9* session;
If there is not interface between ePDG and the PCRF, UE or ePDG send the message of releasing bearing to PDN GW, after PDN GW receives the message of releasing bearing, send IP-CAN session termination message to PCRF, after PCRF receives IP-CAN session termination message, if UE has the service distributing ability, PCRF does not initiate to delete the flow process of S9* session.
Or, do not delete shared session and be specially:
In the UE attachment flow, the network element of fixed network triggers BPCF and sets up the S9* session, and BPCF sends S9* session establishment request message to vPCRF, sets up the S9* session, carries the service distributing ability of UE in the message; UE initiates the connection building process of a plurality of PDN;
When the PDN that goes to connect connects for last PDN, if have interface between ePDG and the vPCRF, ePDG sends the gateway control session termination messages to vPCRF, after vPCRF receives the gateway control session termination messages, if UE has the service distributing ability, vPCRF does not initiate to delete the flow process of S9* session; If there is not interface between ePDG and the vPCRF, UE or ePDG send the message of releasing bearing to PDN GW, receive the message of releasing bearing after, PDN GW sends IP-CAN session termination message to vPCRF; After vPCRF received IP-CAN session termination message, if UE has the service distributing ability, vPCRF did not initiate to delete the flow process of S9* session;
Described BPCF sends S9* session establishment request message to vPCRF, sets up after the S9* session, also comprises: vPCRF sends S9 session establishment request message to hPCRF, sets up the S9 session;
Comprise that also vPCRF does not initiate to delete the flow process of S9 session.
Or, described when UE has the service distributing ability, do not delete shared session and be specially:
In the UE attachment flow, the network element of fixed network triggers BPCF and sets up the S9* session, and BPCF sends S9* session establishment request message to vPCRF, sets up the S9* session, carries the service distributing ability of UE in the message; VPCRF sends S9 session establishment request message to hPCRF, sets up the S9 session; UE initiates the connection building process of a plurality of PDN;
When the PDN that goes to connect connects for last PDN, if have interface between ePDG and the vPCRF, ePDG sends the gateway control session termination messages to vPCRF, after vPCRF receives the gateway control session termination messages, sends S9 session termination request message to hPCRF; After hPCRF received S9 session termination request message, if UE has the service distributing ability, hPCRF did not initiate to delete the flow process of S9* session and S9 session;
Optionally, hPCRF sends S9 session termination response message to vPCRF, carries the information of refusal deletion S9* session and S9 session;
If there is not interface between ePDG and the vPCRF, UE or ePDG send the message of releasing bearing to PDN GW, after receiving the message of releasing bearing, PDN GW sends IP-CAN session termination message to hPCRF, after hPCRF receives IP-CAN session termination message, if UE has the service distributing ability, hPCRF does not initiate to delete the flow process of S9* session and S9 session.
The above is preferred embodiment of the present invention only, is not for limiting protection scope of the present invention, all any modifications of doing within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (14)
1. the control method of a shared session is characterized in that, the method comprises:
UE supports directly to shunt and access simultaneously the core net of 3GPP by non-3GPP network, and when last PDN of deletion access 3GPP core net connected, whether the policy control functions entity had the service distributing ability according to UE, determines whether to delete shared session.
2. method according to claim 1 is characterized in that, described policy control functions entity is PCRF or visited place PCRF (vPCRF) or ownership place PCRF (hPCRF).
3. method according to claim 1, it is characterized in that, the acquisition methods whether described UE has the service distributing ability is: AAA or HSS be by in the access authentication message based on 3GPP, carries and indicate the whether information of supporting business shunting ability of UE, and pass to UE by the fixed network network element; The network element of non-3GPP network is by UE or directly in the access authentication message based on 3GPP, obtains the whether information of supporting business shunting ability of UE of indicating; The policy control functions entity obtains the service distributing ability of UE from the network element of non-3GPP network.
4. according to claim 1 to 3 each described methods, it is characterized in that, whether described policy control functions entity has the service distributing ability according to UE, determines that whether deleting shared session is:
When UE had the service distributing ability, the policy control functions entity was not deleted shared session, when UE does not have the service distributing ability, and the session that the deletion of policy control functions entity is shared.
5. method according to claim 4 is characterized in that, described policy control functions entity is not deleted shared session and is:
In the UE attachment flow, the network element of fixed network triggers BPCF and sets up the S9* session, and BPCF sends S9* session establishment request message to PCRF, sets up the S9* session, carries the service distributing ability of UE in the message;
UE initiates the connection building process of a plurality of PDN;
When the PDN that goes to connect connected for last PDN, if having interface between ePDG and the PCRF, ePDG sent the gateway control session termination messages to PCRF; After PCRF received the gateway control session termination messages, if UE has the service distributing ability, PCRF did not initiate to delete the flow process of S9* session.
6. method according to claim 5 is characterized in that, the method also comprises:
If there is not interface between ePDG and the PCRF, UE or ePDG send the message of releasing bearing to PDN GW, after PDN GW receives the message of releasing bearing, send IP-CAN session termination message to PCRF, after PCRF receives IP-CAN session termination message, if UE has the service distributing ability, PCRF does not initiate to delete the flow process of S9* session.
7. method according to claim 4 is characterized in that, described policy control functions entity is not deleted shared session and is:
In the UE attachment flow, the network element of fixed network triggers BPCF and sets up the S9* session, and BPCF sends S9* session establishment request message to vPCRF, sets up the S9* session, carries the service distributing ability of UE in the message;
UE initiates the connection building process of a plurality of PDN;
When the PDN that goes to connect connects for last PDN, if have interface between ePDG and the vPCRF, ePDG sends the gateway control session termination messages to vPCRF, after vPCRF receives the gateway control session termination messages, if UE has the service distributing ability, vPCRF does not initiate to delete the flow process of S9* session.
8. method according to claim 7 is characterized in that, the method also comprises:
If there is not interface between ePDG and the vPCRF, UE or ePDG send the message of releasing bearing to PDN GW, receive the message of releasing bearing after, PDN GW sends IP-CAN session termination message to vPCRF; After vPCRF received IP-CAN session termination message, if UE has the service distributing ability, vPCRF did not initiate to delete the flow process of S9* session.
9. according to claim 7 or 8 described methods, it is characterized in that,
Described BPCF sends S9* session establishment request message to vPCRF, sets up after the S9* session, and the method also comprises: vPCRF sends S9 session establishment request message to hPCRF, sets up the S9 session;
The method also comprises: vPCRF does not initiate to delete the flow process of S9 session.
10. method according to claim 4 is characterized in that, described policy control functions entity is not deleted shared session and is:
In the UE attachment flow, the network element of fixed network triggers BPCF and sets up the S9* session, and BPCF sends S9* session establishment request message to vPCRF, sets up the S9* session, carries the service distributing ability of UE in the message; VPCRF sends S9 session establishment request message to hPCRF, sets up the S9 session; UE initiates the connection building process of a plurality of PDN;
When the PDN that goes to connect connects for last PDN, if have interface between ePDG and the vPCRF, ePDG sends the gateway control session termination messages to vPCRF, after vPCRF receives the gateway control session termination messages, sends S9 session termination request message to hPCRF; After hPCRF received S9 session termination request message, if UE has the service distributing ability, hPCRF did not initiate to delete the flow process of S9* session and S9 session.
11. according to method according to claim 10, it is characterized in that, the method also comprises:
HPCRF sends S9 session termination response message to vPCRF, carries the information of refusal deletion S9* session and S9 session.
12. method according to claim 10 is characterized in that, the method also comprises:
If there is not interface between ePDG and the vPCRF, UE or ePDG send the message of releasing bearing to PDN GW, after receiving the message of releasing bearing, PDN GW sends IP-CAN session termination message to hPCRF, after hPCRF receives IP-CAN session termination message, if UE has the service distributing ability, hPCRF does not initiate to delete the flow process of S9* session and S9 session.
13. a policy control functions entity is characterized in that, this device comprises: judge module and decision-making module; Wherein,
Judge module is used for UE by non-3GPP network, supports directly to shunt and access simultaneously the core net of 3GPP, when last PDN of deletion access 3GPP core net connects, judges whether UE has the service distributing ability;
Decision-making module, the judged result for whether UE being had the service distributing ability according to judge module determines whether to delete shared session.
14. device according to claim 13 is characterized in that, described policy control functions entity is PCRF or vPCRF or hPCRF.
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