WO2012022222A1 - 一种策略控制会话的关联方法及*** - Google Patents
一种策略控制会话的关联方法及*** Download PDFInfo
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- WO2012022222A1 WO2012022222A1 PCT/CN2011/077925 CN2011077925W WO2012022222A1 WO 2012022222 A1 WO2012022222 A1 WO 2012022222A1 CN 2011077925 W CN2011077925 W CN 2011077925W WO 2012022222 A1 WO2012022222 A1 WO 2012022222A1
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- fixed network
- session
- policy
- bpcf
- pcrf
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M15/00—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M15/00—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
- H04M15/55—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP for hybrid networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M15/00—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
- H04M15/66—Policy and charging system
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/24—Accounting or billing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/22—Processing or transfer of terminal data, e.g. status or physical capabilities
Definitions
- the present invention relates to policy control in the field of mobile communication and fixed network communication, and in particular, to a method and system for association of a policy control session. Background technique
- the network architecture of mobile network and fixed network convergence is shown in Figure 1.
- the part above the dotted line is the part of the mobile network, the part below the dotted line is the fixed network part, and the part of the mobile network is specifically the 3rd Generation Partnership Project (3GPP, 3rd).
- 3GPP 3rd Generation Partnership Project
- Evolved Packet System Evolved Universal Terrestrial Radio Access Network
- Evolved Universal Terrestrial Radio Access Network Evolved Universal Terrestrial Radio Access Network
- MME Mobile Management Unit
- S-GW Serving Gateway
- P-GW Packet Data Network Gateway
- HSS Home Subscriber Server
- AAA Authorized Accounting
- Authentication, Authorization, Accounting consists of the Policy and Charging Rules Function (PCRF) and other supporting nodes.
- the MME is responsible for the control plane, such as mobility management, non-access stratum signaling processing, and user mobility management context management.
- the S-GW is an access gateway device connected to the E-UTRAN, in the E-UTRAN. Forwarding data with the P-GW and buffering the paging waiting data.
- the P-GW is a border gateway of the 3GPP evolved EPS and Packet Data Network (PDN), which is responsible for PDN access, and Forward data between EPS and PDN.
- PDN Packet Data Network
- the fixed network part mainly includes a routing gateway (RG), an access network (AN, Access Network), and a broadband network gateway (BNG, Broadband Network Gateway).
- RG routing gateway
- AN access network
- BNG broadband network gateway
- BRAS Broadband Remote Access Server
- BBF Broadband Forum AAA Server/Proxy
- BFW AAA Server/Proxy Broadband Forum AAA Server/Proxy
- BPCF Broadband Forum Policy Control Function
- the AN may include a digital subscriber line access multiplexer (DSLAM), an optical network terminal (ONT, Optical Network Terminal), and the like, BNG/BRAS, BBF AAA, and The 3GPP HSS/AAA server is used to implement authentication and authorization for user equipment (UE, User Equipment) access, and the BNG/BRAS, BPCF, and EPS PCRF are used to manage and control fixed network resources.
- DSLAM digital subscriber line access multiplexer
- ONT optical network terminal
- BNG/BRAS optical network terminal
- BBF AAA Optical Network Terminal
- the 3GPP HSS/AAA server is used to implement authentication and authorization for user equipment (UE, User Equipment) access
- UE User Equipment
- the network architecture of the fixed network and the mobile network convergence includes an X-MAG (X-Mobility Access Gateway), and the X-MAG is a network element introduced for the fixed network and the mobile convergence, as shown in FIG.
- X-MAG X-Mobility Access Gateway
- the X-MAG is a network element introduced for the fixed network and the mobile convergence, as shown in FIG.
- the network architecture it is included in the fixed network part, and in actual applications, it can also be placed in the mobile network part.
- the UE can access the EPS through the fixed network part.
- the P-GW acts as an anchor point between the EPS and the fixed network part.
- the fixed network part is connected to the P-GW of the EPS through the X-MAG, and the X-MAG and the P-GW are connected through the S2a interface.
- the UE data passes through the fixed network part, the X-MAG, and then reaches the external PDN through the P-GW of the EPS.
- the external PDN may be the Internet or the carrier enterprise network.
- the P-GW has a Policy and Charging Enforcement Function (PCEF), the PCRF and the P-GW exchange information through the Gx interface, and the S5 interface between the S-GW and the P-GW is based on the proxy mobile IP ⁇ 6.
- PCEF Policy and Charging Enforcement Function
- the S-GW has a Bearer Binding and Event Reporting Function (BBERF), and the S-GW and the PCRF exchange information through the Gxc interface.
- BBERF Bearer Binding and Event Reporting Function
- the fixed-line policy and charging control functions are implemented by BPCF and BNG/BRAS. Specifically, BPCF is used to formulate policies, and BNG/BRAS specifically implements the policies formulated by BPCF.
- the main object of the present invention is to provide a method and system for associating a policy control session, which can establish an association of a policy session between a mobile network and a fixed network.
- the present invention provides a method for associating a policy control session.
- the method includes: when the UE accesses the fixed network, establishing a fixed network policy session for the UE at the BPCF, where the BPCF obtains the fixed network information of the UE from the fixed network.
- the BPCF obtains the fixed network information of the UE from the fixed network.
- the BPCF obtains a fixed network of the UE from the mobile network by using an HSS I AAA server or an X-MAG.
- Information The BPCF associates the fixed network policy session with the interworking policy session according to the fixed network information of the UE obtained from the fixed network and the mobile network.
- the BPCF associates the fixed network policy session with the interworking policy session according to the fixed network information of the UE obtained from the fixed network and the mobile network
- the method includes: the fixed network information includes the following One or more of the information: the fixed network ID of the UE, the fixed network IP address of the UE, the IP address of the UE fixed network IP converted by the network address, and the user data protocol (UDP) port number; the BPCF is based on The fixed network ID of the UE, and/or the fixed network IP address of the UE, and/or the IP address of the UE fixed network IP address converted by the network address plus the UDP port number, associate the fixed network policy session with the interworking policy session .
- the fixed network information includes the following One or more of the information: the fixed network ID of the UE, the fixed network IP address of the UE, the IP address of the UE fixed network IP converted by the network address, and the user data protocol (UDP) port number
- UDP user data protocol
- the BPCF obtains the fixed network information of the UE from the mobile network by using the HSS/AAA server or the X-MAG, and includes: when the UE accesses the mobile network, sending the fixed network information of the UE to the mobile network through the authentication process.
- the X-MAG forwards the fixed network information of the UE to the current P-GW during the establishment of the current PDN connection; when establishing the IP-CAN session, The current packet data network gateway (P-GW) sends the fixed network information of the UE to the PCRF; when establishing the interworking policy session, the PCRF sends the fixed network information of the UE to the BPCF; Alternatively, when the UE accesses the mobile network, the fixed network information of the UE is sent to the HSS I AAA server through the authentication process. In the process of establishing the current PDN connection, the UE is secured by the HSS/AAA server.
- P-GW packet data network gateway
- the network information is forwarded to the P-GW; when the IP-CAN session is established, the current P-GW sends the fixed network information of the UE to the PCRF; when establishing the interworking policy session, the PCRF will The fixed network information of the UE is sent to the BPCF.
- the establishment of the interworking policy session at the BPCF includes: when the UE establishes a PDN connection, an IP-CAN session is established between the current P-GW and the PCRF, triggering the current PCRF to initiate and complete the self and the The establishment of an interworking policy session between BPCFs.
- the method when the PDN connection exists in the UE, the method further includes: the current PCRF according to the obtained fixed network information of the UE or the mobile network ID, The IP-CAN session in the PDN connection establishment process is associated with the established interworking policy session that is associated with the fixed network policy session, and reuses the established interworking policy session.
- the method before the PCRF multiplexes the established interworking policy session, the method further includes: determining, by the PCRF, whether there is an interworking policy session that conforms to the current IP-CAN session in the established interworking policy session, if If yes, the PCRF multiplexes the interworking policy session that is consistent with the current IP-CAN session. Otherwise, the current PCRF establishes an interworking policy session between itself and the BPCF.
- the PCRF determines whether there is an interworking policy session that matches the current IP-CAN session in the established interworking policy session, including: whether the IPF CAN session in the previous IP-CAN session determines whether there is an IP-CAN session.
- the fixed network IP address of the UE, and/or the fixed network IP address of the UE or the NAT-transformed IP address and UDP port number, and/or the access type are the same as in the current IP-CAN session; if they are the same, there is Interworking policy for IP-CAN sessions that match the current PDN connection Slightly session, otherwise, there is no interworking policy session for the IP-CAN session that matches the current PDN connection.
- the method before the PDN connection exists in the UE, before the multiplexed any existing PDN connection, the method further includes: the PCRF completing the existing interworking policy by itself When the session is established, the acquired fixed network information of the UE is saved, and the fixed network information of the UE is obtained from itself when the interworking policy session is established; or, the current IP is established before multiplexing the established interworking policy session.
- the PCRF acquires fixed network information of the UE from the P-GW.
- the establishing a fixed network policy session for the UE at the BPCF includes: the policy enforcement entity in the fixed network initiates itself and the BPCF A fixed network policy session between the UE and the fixed network information of the UE obtained by the UE is sent to the BPCF.
- the policy enforcement entity initiates a fixed network policy session between the UE and the BPCF, and acquires the fixed network information of the UE, including: the policy enforcement entity is BNG/BRAS, and the BNG/BRAS
- the establishment of the fixed network policy session between the self and the BPCF is initiated by the triggering of the fixed network authentication process and/or the local connection establishment, and the fixed network information of the UE is obtained from the UE.
- the present invention also provides a policy control session association system, the system includes: a BPCF, where the BPCF includes a first session establishment unit, a second session establishment unit, and an association unit, where the first session establishment unit is configured to When the UE accesses the fixed network, the fixed network policy session is established for the UE at the BPCF, and the fixed network information of the UE is obtained from the fixed network; the second session establishing unit is configured to access the fixed network through the UE.
- an interworking policy session is established for the UE, and the fixed network information of the UE is obtained from the mobile network by using the HSS I AAA server or the X-MAG; the association unit is configured to establish according to the first session.
- the unit, and the fixed network information of the UE acquired by the second session establishing unit associate the fixed network policy session established by the first session establishing unit with the interworking policy session established by the second session establishing unit.
- the fixed network information includes one or more of the following information: a fixed network ID of the UE, a fixed network IP address of the UE, and an IP address converted by the network fixed address of the UE via the network address plus UDP a port number; the association unit, configured to acquire, according to the first session establishing unit, and the second session establishing unit, a fixed network ID of the UE, and/or a fixed network IP address of the UE, and/or a UE fixed network IP The address is translated by the network address translated IP address plus the UDP port number, and the fixed network policy session is associated with the interworking policy session.
- the system further includes: one or more PCRFs, one or more P-GWs, and an X-MAG and/or an HSS/AAA server, where the X-MAG is used in the UE Acquiring the fixed network information of the UE in the authentication process, and forwarding the fixed network information of the acquired UE to the P-GW connected to the current PDN in the process of establishing the current PDN connection;
- the HSS/AAA server is used for Acquiring the fixed network information of the UE in the authentication process of the UE, and forwarding the fixed network information of the acquired UE to the P-GW connected to the current PDN in the process of establishing the current PDN connection;
- P- a GW configured to establish an IP-CAN session with the PCRF, and send the fixed network information of the UE to the PCRF, where the PCRF is used to initiate and complete the current PDN connection when the UE establishes a current PDN connection.
- the PCRF is further configured to: when the PDN connection already exists in the UE, for any additional PDN connection, according to the acquired fixed network information or the mobile network ID of the UE,
- the IP-CAN session in the PDN connection establishment process is associated with the established interworking policy session that is associated with the fixed network policy session, and reuses the established interworking policy session.
- the system further includes: the policy enforcement entity of the fixed network, where the policy enforcement entity of the fixed network is configured to initiate and establish a fixed network between itself and the first session establishing unit of the BPCF.
- the policy session sends the fixed network information of the UE obtained by itself to the first session establishing unit.
- the method and system for associating a policy control session of the present invention are respectively when the UE accesses the fixed network
- a fixed network policy session is established at the BPCF, and when the UE accesses the mobile network, an interworking policy session is established at the BPCF, and finally the two sessions are associated by the BPCF, thereby realizing the policy control session and the fixed network in the mobile network.
- the policy controls the association of the session, so that the policy enforcement entity of the fixed network, such as the BNG/BRAS, can dynamically obtain the strategy of the fixed network and the policy of the mobile network from the BPCF during the establishment of the policy control session, and report the two sessions through the above two sessions.
- the event finally realizes the unified management of the mobile network and the fixed network resources through the control of the BPCF and the execution of the PCRF and the fixed network policy execution entity.
- FIG. 1 is a schematic diagram of a network architecture in a scenario of a mobile network and a fixed network convergence;
- FIG. 3 is a schematic structural diagram of a policy control session association system according to the present invention.
- Embodiment 4 is a flowchart of a specific implementation of Embodiment 1 of the present invention.
- FIG. 5 is a flowchart of a specific implementation of Embodiment 2 of the present invention.
- Embodiment 6 is a flowchart of a specific implementation of Embodiment 3 of the present invention.
- FIG. 7 is a flowchart of a specific implementation of Embodiment 4 of the present invention. detailed description
- the basic idea of the present invention is: the UE accesses the fixed network, and the policy enforcement entity in the fixed network, such as the BNG/BRAS, initiates the establishment of a fixed network policy session between itself and the BPCF, and the BPCF performs the policy execution during the establishment of the fixed network policy session.
- the UE accesses the mobile network, such as the EPS network, through the fixed network, and sends the fixed network information of the UE to the X-MAG/3GPP AAA server through the EPS authentication process, and the subsequent process
- the P-GW is forwarded to the P-GW by the X-MAG/3GPP AAA server.
- the current P-GW When the PDN connection is established, the current P-GW initiates an IP-CAN session establishment, and sends the fixed network information of the UE to the PCRF, and triggers the PCRF to initiate the BPCF. It The interworking policy session is established, and the fixed network information of the UE is sent to the BPCF. Finally, the BPCF associates the interworking policy session established in the mobile network with the fixed network policy established on the fixed network according to the fixed network information of the UE. Make an association.
- a method for associating a policy control session of the present invention mainly includes the following steps:
- Step 201 When the UE accesses the fixed network, establish a fixed network policy session for the UE at the BPCF, where the BPCF obtains the fixed network information of the UE from the fixed network;
- the fixed network policy session is a session established between a policy enforcement entity of the fixed network, such as BNG/BRAS, and the BPCF, for transmitting policy and event notification.
- a policy enforcement entity of the fixed network such as BNG/BRAS, and the BPCF
- Step 202 When the UE accesses the mobile network through the fixed network, establish an interworking policy session for the UE at the BPCF, where the BPCF passes a Home User/Authentication Authorization (HSS I AAA ) server or an interworking network element ( X-MAG) acquiring the fixed network information of the UE from the mobile network;
- HSS I AAA Home User/Authentication Authorization
- X-MAG interworking network element
- Step 203 The BPCF associates the fixed network policy session with the interworking policy session according to the fixed network information of the UE obtained from the fixed network and the mobile network.
- the fixed network information of the UE may include one or more of the following information:
- the fixed network IP address of the UE the fixed network IP address of the UE, the NAT-transformed IP address of the UE fixed network IP plus the User Datagram Protocol (UDP) port number, and the protocol type of the UE.
- UDP User Datagram Protocol
- the BPCF associates the fixed network policy session with the interworking policy session according to the obtained fixed network information of the UE, in any one of the following manners, including:
- the fixed network IP address of the UE/the converted network address The IP address plus the UDP port number is associated.
- step 201 when the UE accesses the fixed network, the fixed network policy session is established for the UE at the BPCF, and the BPCF obtains the fixed network information of the UE from the fixed network, and includes: the policy enforcement entity in the fixed network.
- a fixed network policy session between the UE and the BPCF is initiated, and the fixed network information of the UE obtained by the UE is sent to the BPCF.
- the policy enforcement entity may be a BNG/BRAS
- the BNG/BRAS is triggered by a fixed network authentication process and/or a local connection establishment, and initiates establishment of a fixed network policy session between the self and the BPCF, and
- the UE acquires fixed network information of the UE.
- the present invention exemplifies the establishment of a fixed network policy session by the BNG/BRAS and the BPCF of the fixed network, but does not exclude other network elements in the fixed network from establishing a "fixed network policy session" with the BPCF as a policy enforcement entity. Possibly, for such a scenario, the invention is equally applicable, as long as the BNG/BRAS is replaced by a corresponding policy enforcement entity.
- the interworking policy session is established for the UE at the BPCF, including: when the UE establishes a PDN connection, the current P-GW and the PCRF Establishing an IP-CAN session, triggering the current PCRF to initiate and complete the establishment of an interworking policy session between itself and the BPCF.
- the method further includes: when the UE has a PDN connection, the method further includes: the current PCRF establishes the current PDN connection according to the acquired fixed network information or the mobile network ID of the UE.
- the in-process IP-CAN session is associated with an established interworking policy session that is associated with the fixed network policy session and reuses the established interworking policy session.
- the PCRF Before the PCRF multiplexes the established interworking policy session, the PCRF needs to determine, according to the fixed network information of the UE, whether there is an interworking policy of the IP-CAN session conforming to the current PDN connection in the established interworking policy session. a session, if any, the PCRF multiplexes an interworking policy session that is consistent with the current IP-CAN session, otherwise the PCRF needs to establish an nth interworking policy session with the BPCF, and the BPCF is based on the UE Fixed network information, will be n The interworking policy session is associated with a fixed network policy session.
- n is an integer greater than 1.
- the PCRF determines whether there is a fixed network IP address of the UE in the IP-CAN session, and/or a fixed network IP address of the UE or a NAT-transformed IP address and a UDP port number in the previous IP-CAN session. And/or the access type is the same as in the current IP-CAN session; if they are the same, there is an interworking policy session that conforms to the current IP-CAN session; otherwise, there is no interworking policy session that matches the IP-CAN session of the current PDN connection.
- the UE when the UE establishes a subsequent additional PDN connection, if the additional PDN connection uses the same PCRF as the previous PDN connection, the current PCRF can directly re-establish the established and associated with the fixed network.
- the interworking policy session of the policy session can also establish an interworking policy session with the BPCF, and then the BPCF associates the newly created interworking policy session with the fixed network policy session; otherwise, the current PCRF can only be between itself and the BPCF.
- An interworking policy session is established, and the interworking policy session is associated with the fixed network policy session by the BPCF.
- the BPCF obtains the fixed network information of the UE from the mobile network by using the HSS/AAA server or the X-MAG, and includes: when the UE accesses the mobile network, sending the fixed network information of the UE to the XM AG through the authentication process.
- the XM AG forwards the fixed network information of the UE to the current P-GW during the establishment of the current PDN connection; when the IP-CAN session is established, the current packet data network gateway (P-GW) The fixed network information of the UE is sent to the PCRF; when the interworking policy session is established, the PCRF sends the fixed network information of the UE to the BPCF; or when the UE accesses the mobile network, it The fixed network information is sent to the HSS I AAA server through the authentication process. During the establishment of the current PDN connection, the HSS/AAA server forwards the fixed network information of the UE to the P-GW; During the session, the current P-GW sends the fixed network information of the UE to the PCRF. When the interworking policy session is established, the PCRF sends the fixed network information of the UE to the BPCF.
- the PCRF sends the fixed network information of the UE to the BPCF.
- the method further includes: the PCRF completing itself When the establishment of the interworking policy session is established, the acquired fixed network information of the UE is saved, and when the interworking policy session is established, the fixed network information of the UE is obtained from the UE; or, before multiplexing the established interworking policy session, When the current IP-CAN session is established, the PCRF acquires the fixed network information of the UE from the P-GW.
- the HSS / AAA server can be a 3GPP HSS / AAA server.
- the UE can establish multiple PDN connections through the fixed network access to the mobile network.
- the first IP-CAN session is established between the P-GW and the PCRF, triggering the PCRF to initiate the establishment of the first interworking policy session between itself and the BPCF, and the PCRF completes its own and the session.
- the establishment of the first interworking policy session between the BPCFs obtaining the fixed network information of the UE from the P-GW, and transmitting the information to the BPCF, and saving to the self, and then the BPCF, according to the fixed network information of the UE, the first interworking policy
- the session is associated with the fixed network policy session described above.
- an nth IP-CAN session is established between the current P-GW and the PCRF, triggering between the PCRF and the BPCF.
- the PCRF obtains the fixed network information of the UE saved in the previous establishment of the interworking policy session, or acquires the fixed network information of the UE from the P-GW, and sends the information to the BPCF, and then the BPCF according to the UE
- the fixed network information, the nth interworking policy session is associated with the fixed network policy session; or, when the UE already has a PDN connection, for any additional PDN connection, such as the nth PDN connection, the current P
- the nth IP-CAN session is established between the GW and the PCRF, and the PCRF can also establish an IP-CAN session in the current PDN connection establishment process according to the acquired fixed network information or the mobile network ID of the UE.
- an interworking policy session is established between the GW and the PCRF, and the PCRF can also establish an IP-CAN session in the current PDN connection establishment process according
- the present invention further provides an association system for a policy control session.
- the system mainly includes a BPCF_31, where the BPCF_31 mainly includes a first session establishing unit 311 and a second session establishing unit 312.
- the voice establishing unit 311 is configured to: when the UE accesses the fixed network, establish a fixed network policy session for the UE at the BPCF, and acquire the fixed network information of the UE from the fixed network; the second session establishing unit 312 is configured to pass the UE When the fixed network accesses the mobile network, an interworking policy session is established for the UE at the BPCF, and the fixed network information of the UE is obtained from the mobile network by using the HSS I AAA server or the X-MAG; the association unit 313 is configured to The fixed network information of the UE acquired by the first session establishing unit 311 and the second session establishing unit 312, the fixed network policy session established by the first session establishing unit 311, and the second session establishing unit 312 The established interworking policy session is associated.
- the association unit 313 may be configured to acquire, according to the first session establishing unit 311, and the second session establishing unit 312, a fixed network ID of the UE, and/or a fixed network IP address of the UE, and/or a UE solid.
- the IP address of the network IP address is translated by the IP address of the network address plus the UDP port number, and the fixed network policy session is associated with the interworking policy session.
- the system further includes: one or more PCRF_32, one or more P-GW_33, and an X-MAG_34 and/or an HSS I AAA server 35, where
- the X-MAG_34 is configured to acquire the fixed network information of the UE in the authentication process of the UE, and forward the fixed network information of the acquired UE to the current PDN connection in the process of establishing the current PDN connection.
- the P-GW_33; the HSS/AAA server 35 is configured to acquire the fixed network information of the UE in the authentication process of the UE, and set the fixed network information of the acquired UE in the process of establishing the current PDN connection.
- P-GW_33 is used to establish an IP-CAN session with the PCRF_32, and send the fixed network information of the UE to the PCRF_32;
- PCRF_32 is used to establish in the UE
- the establishment of the interworking policy session between the UE and the second session establishing unit 312 of the BPCF_31 is initiated and completed, and the fixed network information of the UE is sent to the second session establishing unit 312 of the BPCF_31.
- the HSS/AAA server 35 can be a 3GPP AAA server.
- the PCRF_32 may be further configured to: when the PDN connection already exists in the UE, for any additional PDN connection, according to the obtained fixed network information or the mobile network ID of the UE, the current PDN connection establishment process
- the IP-CAN session is associated with an established interworking policy session that is associated with the fixed network policy session and reuses the established interworking policy session.
- the system may further include: the fixed network policy enforcement entity 36, the fixed network policy enforcement entity 36 is configured to initiate and establish a fixed network policy session between itself and the first session establishing unit 311 of the BPCF_31. And sending the fixed network information of the UE that is obtained by the UE to the first session establishing unit 311.
- the policy enforcement entity 36 of the fixed network may be a BNG/BRAS, and the BNG/BRAS is triggered by the fixed network authentication process and/or the local connection establishment of the UE, and initiates a fixed network policy session between the self and the BPCF_31. Establishing, and acquiring fixed network information of the UE from the UE.
- the session association system is controlled by the foregoing policy, and the association between the policy control session in the mobile network and the policy control session in the fixed network in the scenario of the mobile network and the fixed network convergence is implemented, and the specific process refers to the detailed description of the above method. , will not repeat them here.
- this embodiment is applicable to a process for establishing an attached/added PDN connection when a UE accesses an EPS through a fixed network, where the fixed network is a trusted non-3GPP access of the EPS network, including roaming, non- Various scenes such as roaming.
- the UE in the process of the UE accessing the fixed network, the UE sends its own fixed network information to the BNG/BRAS during the fixed network authentication process and/or the local connection establishment, and then between the BNG/BRAS and the BPCF.
- the BNG/BRAS sends the fixed network information to the BPCF.
- the UE sends its own fixed network information to the X-MAG through the EPS authentication process.
- the fixed network information is forwarded to the P-GW by the X-MAG.
- the P-GW After the P-GW establishes the IP-CAN session, the P-GW sends the fixed network information to the PCRF.
- the PCRF sends the fixed network information of the UE obtained by itself to the PCRF.
- the BPCF associates the established interworking policy session with the fixed network policy session according to the fixed network information acquired from the PCRF and the fixed network information acquired from the UE.
- the fixed network policy session established between BNG/BRAS and BPCF is unique for each UE; the interworking policy session between BPCF and PCRF, and the IP-CAN session between P-GW and PCRF For each PDN connection, it is unique, and one UE can establish multiple PDN connections, so that for the same UE, there are multiple interworking policy sessions between multiple BPCFs and PCRFs, and multiple IP addresses.
- - CAN session Therefore, in the present embodiment, at the BPCF, the fixed network policy session between the BGN/BRAS and the BPCF, and the interworking policy session with the BPCF and the PCRF are one-to-many association relationships.
- Step 401 The UE uses the traditional fixed network authentication mode to pass the fixed network authentication
- Step 402 The UE establishes a local connection with the fixed network, and obtains the fixed network IP address IP-1 assigned by the fixed network, and sends the fixed network information of the UE to the BNG/BR AS in the process;
- Step 403 The BNG/BRAS initiates a setup request of the fixed network policy session to the BPCF by the local connection establishment and/or the authentication process, and sends the fixed network information of the UE obtained in the foregoing process to the BPCF.
- the BNG/BRAS and the BPCF establish a session for applying and/or issuing a dynamic policy, so that the BPCF can accurately control the network resource allocation and user admission of the fixed network.
- the fixed network information includes a fixed network ID of the UE, and/or an IP address allocated by the fixed network to the UE, and may also include a port number and a protocol type other than the IP. If the fixed network information obtained by the BNG/BRAS from the UE is an address obtained by the network address translation (NAT) of the fixed network IP address of the UE, the NAT-transformed IP address plus the UDP port number is added. The fixed network information of the UE is reported to the BPCF.
- NAT network address translation
- Step 404 The UE sends a Layer 3 negotiation request to the X-MAG to request access to the EPS network.
- the Layer 3 negotiation request includes the mobile network ID of the UE and the parameters such as the APN.
- Step 405 The X-MAG receives the Layer 3 negotiation request, and initiates an authentication process for the UE by using the 3GPP-based authentication mode.
- Extended Authentication Protocol - Logo EAP-ID, Extensible
- the authentication method used by X-MAG can be UMTS authentication and key agreement extensible authentication protocol method ( EAP-AKA, Extensible Authentication Protocol
- Step 406 The UE receives the EAP-ID request message, returns an EAP-ID response message to the X-MAG, and carries the fixed network information of the UE in the EAP-ID response message, and the X-MAG forwards the EAP-ID response message to the 3GPP.
- HSS/AAA server HSS/AAA server
- the UE may directly include the fixed network information of the UE in the identifier field of the EAP-ID response message, where the fixed network information of the UE is used as the UE.
- the pseudo identity is used; or the UE may also carry its own fixed network information as a new field of the EAP-ID response message by extending the EAP-ID response message;
- the UE may use the extended network EAP-ID response message to use its own fixed network information as Carrying a new field of the EAP-ID response message;
- the UE When the fixed network information of the UE includes the fixed network IP address and the fixed network ID of the UE, or the IP address and port number obtained by NAT after the UE fixed network IP address is included, and the fixed network ID, the UE extends the EAP- The ID response message carries its own fixed network information as a new field of the EAP-ID response message.
- Step 407 The X-MAG obtains the fixed network information of the UE from the EAP-ID response message returned by the UE, and saves the information.
- Step 408 continuing the subsequent 3GPP access authentication process, such as the EAP-AKA authentication process;
- the X-MAG parses the fixed IP address IP-1 of the UE or the IP address and UDP port number of the fixed network IP address IP-1 converted by the NAT from the IP header of the Layer 3 negotiation request, and sends the IP address and the UDP port number of the UE.
- the PBU (the ⁇ binding request) message is sent to the P-GW to request the tunnel binding with the P-GW, and the acquired UE fixed network information is carried in the PBU message, so that the fixed network information of the UE and the subsequent ⁇ 6 are to be established. There is a correspondence between the tunnels;
- X-MAG acts as the mobile anchor gateway for the PMIPv6 tunnel to be established.
- Step 410 After receiving the PBU message sent by the X-MAG, the P-GW allocates the IP address IP-2 of the EPS network to the UE, and establishes a first network protocol connection access network (IP-CAN, between the P-GW and the PCRF, The IP-Connectivity Access Network is configured to parse the fixed network information of the UE from the PBU message, and send the parsed fixed network information of the UE to the PCRF by using the setup signaling of the first IP-CAN session;
- IP-CAN network protocol connection access network
- the establishment signaling of the first IP-CAN session further includes the mobile network information of the UE.
- the mobile network information of the UE includes: an IP address IP-2, a port number, a protocol type, and the like allocated by the EPS to the UE.
- the PCRF formulates a Policy and Charging Control (PCC) policy according to the fixed network information and the mobile network information of the UE sent by the P-GW. .
- PCC Policy and Charging Control
- Step 411 The P-GW sends an APN/P-GW identity pair to the 3GPP HSS/AAA server by using the Diameter signaling, and the 3GPP HSS/AAA server stores the identifier of the P-GW, and completes the identifier update of the P-GW.
- Step 412 The P-GW returns a PBA ( ⁇ Binding Acknowledgment) message to the X-MAG, and carries the IP address IP-2 allocated to the UE in the message;
- PBA Binding Acknowledgment
- Step 413 The X-MAG completes Layer 3 negotiation with the UE, and sends the mobile network IP address IP-2 allocated to the UE to the UE.
- the X-MAG can perform the IP-2 by performing signaling when it performs three-layer negotiation with the UE.
- the IP-2 may be sent to the UE by using newly defined signaling or other existing signaling after completing the Layer 3 negotiation.
- Step 414 triggered by the establishment of the first IP-CAN session between the PCRF and the P-GW, the PCRF initiates the establishment of the first interworking policy session between itself and the BPCF, and the PCRF obtains the fixed network information obtained from the P-GW. Sent to BPCF;
- the PCRF sends a related policy to the BPCF.
- Step 415 After the BPCF establishes a first interworking policy session with the PCRF, the fixed network policy between itself and the BNG/BRAS is determined according to the UE fixed network information obtained from the PCRF and the UE fixed network information obtained from the BNG/BRAS. The session, and the first interworking policy session between itself and the PCRF are associated;
- the fixed network information of the UE may include a fixed network ID of the UE, and/or an IP address IP-1 assigned by the fixed network to the UE, and/or an IP address and a UDP port number converted by the NAT-1, specifically
- the above association can be completed according to any one of the following three schemes or a combination of any of the following:
- BPCF associates the fixed network policy session with the first interworking policy session according to the fixed network ID of the UE in the fixed network information of the UE;
- the BPCF sets the fixed network policy session and the first interworking policy session according to the IP address IP-1 assigned by the fixed network to the UE in the fixed network information of the UE, and/or the IP address and UDP port number converted by the NAT. Association
- the BPCF will fix the fixed network according to the fixed network ID of the UE in the fixed network information of the UE and the IP address IP-1 and/or IP-1 of the fixed network allocated to the UE through the NAT translated IP address and UDP port number.
- the session is associated with the first interworking policy session.
- the PCRF sends the relevant policy to the BPCF.
- the BPCF updates the BNG/BRAS related policy according to the actual situation, and the BNG/BRAS performs the corresponding operation according to the updated policy. So that the fixed network can be dynamic
- the acquisition strategy enables unified management of mobile resources and fixed network resources.
- Step 416 The UE completes the first PDN connection, establishes a data channel with the server, and starts to send and receive data packets.
- Step 417 the UE starts to establish an additional PDN connection, and the second PDN connection sends a Layer 3 negotiation request to the X-MAG.
- the Layer 3 negotiation request includes parameters such as a mobile network ID and an APN of the UE, where the APN parameter of the UE may be different from the APN when the first PDN connection is established, or may be the same.
- Step 418 After receiving the Layer 3 negotiation request sent by the UE, the X-MAG acquires the fixed network information of the UE from itself.
- the X-MAG Since the X-MAG has already saved the acquired fixed network information of the UE during the first PDN connection establishment process, the X-MAG can obtain the fixed network information of the UE from itself.
- Step 419 The X-MAG parses out the fixed network IP address IP-1 of the UE, or the NAT-transformed IP address and UDP port number of the UE from the IP header of the Layer 3 negotiation request, and sends a PBU message to the P. -GW, requesting binding with the P-GW tunnel, and carrying the UE fixed network information acquired in the PBU message, so as to establish a correspondence between the UE fixed network information and the subsequent PMIPv6 tunnel to be established;
- the P-GW to which the second PDN is connected may be the same as or different from the P-GW to which the first PDN is connected.
- the X-MAG is in the PBU.
- the message may not carry the fixed network information. If the P-GW connected to the second PDN is different from the P-GW connected to the first PDN, the X-MAG needs to carry the fixed network information of the UE in the PBU message.
- the P-GW corresponding to the second PDN connection acquires the UE fixed network information.
- Step 420 After receiving the PBU message sent by the X-MAG, the P-GW allocates the EPS for the UE.
- a second IP-CAN session is established between the IP address IP-3, the P-GW and the PCRF in the network.
- the PBU message carries the fixed network information of the UE
- the P-GW needs to parse out the fixed network information of the UE.
- the second IP-CAN session establishment signaling is used to send the UE fixed network information to the PCRF; if the PBU message does not carry the UE fixed network information, the P-GW saves itself and acquires when the first IP-CAN session is established.
- the received UE fixed network information is sent to the PCRF through the second IP-CAN session establishment signaling.
- the P-GW may not send the UE fixed network information to the PCRF.
- the PCRF may be based on the UE fixed network information obtained when establishing the first IP-CAN session, and is established.
- the UE mobile network information sent by the P-GW in the second IP-CAN session, and the PCC policy is formulated; if the PCRF selected by the P-GW is different from the first PDN in the current second PDN connection, the P-GW needs to When the second IP-CAN session is established, the UE fixed network information is sent to the PCRF, so that the PCRF formulates the PCC policy according to the fixed network information of the UE and the mobile network information of the UE.
- the mobile network information includes: an IP address IP-3, a port number, a protocol type, and the like allocated by the EPS network to the UE.
- Step 421 The P-GW sends an APN/P-GW identity pair to the 3GPP HSS/AAA server through the Diameter signaling, and the 3GPP HSS/AAA server stores the identifier of the P-GW, and completes the identifier update of the P-GW.
- Step 422 The P-GW returns a PBA message to the X-MAG, and carries the IP address IP-3 allocated to the UE in the message.
- Step 423 The X-MAG completes the Layer 3 negotiation with the UE, and sends the IP address IP-3 allocated to the UE to the UE.
- Step 424 triggering establishment of a second IP-CAN session between the PCRF and the P-GW, PCRF Initiating the establishment of a second interworking policy session between itself and the BPCF, and acquiring the self-acquisition
- the UE fixed network information is sent to the BPCF;
- the PCRF acquires the UE fixed network information from the P-GW, and then sends the acquired UE fixed network information to the BPCF; if the PCRF establishes the second IP with the P-GW.
- the UE does not obtain the fixed network information of the UE from the P-GW, and the PCRF finds the fixed network information of the UE that has been saved by acquiring the mobile network ID of the UE, and sends the information to the BPCF.
- Step 425 After the BPCF establishes a second interworking policy session with the PCRF, according to the UE fixed network information acquired from the PCRF and the UE fixed network information acquired from the BNG/BRAS, the fixed network policy session and the current The second policy session is associated.
- step 415 the specific method of association is the same as step 415.
- Step 426 The UE completes the establishment of the additional second PDN connection, establishes a data channel, and starts to send and receive data packets.
- the first interworking policy session of the first PDN connection in the embodiment and the second interworking policy session of the second PDN connection are respectively associated with the fixed network policy session.
- the UE may further establish multiple PDN connections, such as a third PDN connection and a fourth PDN connection, by using the mode of steps 417-426, and the corresponding interworking policy session in each PDN connection.
- PDN connections such as a third PDN connection and a fourth PDN connection.
- the association mechanism between the fixed network policy sessions is the same as above.
- this embodiment is applicable to a process for establishing an attached/added PDN connection when a UE accesses an EPS through a fixed network, where the fixed network is a trusted non-3GPP access of the EPS network, including roaming, non- Various scenes such as roaming.
- the BNG/BRAS when the UE accesses the fixed network, the BNG/BRAS initiates establishment of the fixed network policy session; when the UE accesses the EPS network, and establishes the first PDN connection, the P-GW initiates an IP-CAN session establishment, The triggered PCRF will initiate the establishment of the first interworking policy session, after which the BPCF associates the first interworking policy session with the fixed network policy session; The connection is established, and the PCRF multiplexes the established first interworking policy session and modifies the session.
- the UE when the UE accesses the fixed network, when the UE accesses the fixed network, the UE sends its own fixed network information to the BNG/BRAS when the fixed network authentication process and/or the local connection is established, and then, in the BNG.
- the BNG/BRAS sends the fixed network information to the BPCF.
- the UE sends its own fixed network information through the EPS authentication process.
- the fixed network information is forwarded by the X-MAG to the P-GW, and then, when the P-GW establishes the IP-CAN session, the fixed network information is sent to the PCRF, between the PCRF and the BPCF.
- the PCRF sends the fixed network information obtained by itself to the BPCF; the BPCF learns the first interworking policy session according to the fixed network information obtained from the PCRF and the fixed network information obtained from the UE itself.
- the first interworking policy session is modified by the PCRF and the BPCF to re-establish the first interworking policy session.
- the interworking policy session between the IP-CAN session and the BPCF and the PCRF is a many-to-one association relationship, and the interworking policy session and the fixed network policy session are in a one-to-one relationship.
- Steps 501-523 same steps 401-423;
- Step 524 A trigger is triggered by establishing a second IP-CAN session between the PCRF and the P-GW, and the PCRF finds an established session with the second IP-CAN according to the acquired fixed network information of the UE or the mobile network ID. Consistent first interworking policy session, and associating the second IP-CAN session to the first interworking policy session;
- the PCRF determines whether the existing interworking policy session between itself and the BPCF conforms to the second IP-CAN session, and the determination method may specifically use the following four Any one or any combination of multiple:
- the PCRF determines the fixed network ID of the UE in the first IP-CAN session and the second IP-CAN session Whether they are the same, the same is true, otherwise it does not meet;
- the PCRF determines whether the IP address and the UDP port number of the fixed IP address of the UE or the fixed network IP address of the UE after NAT conversion are the same in the first IP-CAN session and the second IP-CAN session, and the same is true. Otherwise not met;
- the PCRF determines whether the fixed network ID of the UE and the fixed network IP address of the UE or the fixed network IP address of the UE are NAT-transformed IP address and UDP port number in the first IP-CAN session and the second IP-CAN session Same, the same is true, otherwise it does not match;
- the PCRF determines whether the fixed network ID and the access type of the UE are the same in the first IP-CAN session and the second IP-CAN session, and whether the access type is a fixed network access, if yes, then, otherwise, incompatible;
- the PCRF initiates the modification process of the first interworking policy session, and delivers the relevant policy to the BPCF.
- the BPCF updates the policy to the BNG/BRAS according to the actual situation, and the BNG/BR AS The updated policy performs the corresponding action.
- Step 525 The user completes the establishment of the additional second PDN connection, establishes a data channel, and starts transmitting and receiving data packets.
- two IP-CAN sessions corresponding to two PDN connections correspond to the first interworking policy session between the BPCF and the PCRF, and the first policy session between BPCF and PCRF, and BPCF and BNG/
- the relationship between the fixed network policy sessions between the BRASs is the corresponding relationship.
- the UE may further establish multiple PDN connections, such as a third PDN connection and a fourth PDN connection, by using the mode of steps 517-525, where each PDN connection corresponds to the same interworking policy session.
- PDN connections such as a third PDN connection and a fourth PDN connection
- the association mechanism between the interworking policy session and the fixed network policy session is the same as above.
- the embodiment is applicable to a process for establishing an attached/added PDN connection when a UE accesses an EPS through a fixed network, where the fixed network is a trusted non-3GPP access of the EPS network. It includes various scenarios such as roaming and non-roaming.
- the UE in the process of the UE accessing the fixed network, the UE sends its own fixed network information to the BNG/BRAS when the fixed network authentication process and/or the local connection is established, and then, in the BNG/BRAS and the BPCF.
- the BNG/BRAS sends the fixed network information to the BPCF.
- the UE In the process of attaching to the EPS, the UE sends its own fixed network information to the 3GPP AAA server through the EPS authentication process.
- the P-GW is forwarded to the P-GW by the 3GPP AAA server.
- the P-GW sends an IP-CAN session to the PCRF, establishes an interworking policy session between itself and the BPCF, and sends the fixed network information of the UE to the BPCF. Finally, the BPCF associates the interworking policy session between itself and the PCRF with the fixed network policy session between itself and the BNG/BRAS according to the fixed network information of the UE.
- Step 607 The 3GPP HSS/AAA server receives the EAP-ID response message, obtains the fixed network information, and saves the information.
- Step 608 which is the same as step 408;
- Step 609 The X-MAG parses out the fixed network IP address IP-1 of the UE from the three-layer negotiation request, or obtains the IP address IP-1 obtained by the UE on the fixed network or the NAT converted from the IP packet header therein. IP address and UDP port number, and triggered by the Layer 3 negotiation request, the X-MAG acts as the mobile anchor gateway of the PMIPv6 tunnel to be established, sends a PBU message to the P-GW, requests the tunnel binding with the P-GW, and The PBU message carries the fixed network information acquired by the PBU, so that there is a correspondence between the fixed network information of the UE and the PMIPv6 tunnel to be established subsequently;
- Step 610 The P-GW receives the PBU message, and the EPS network allocates an IP address IP-4 to the UE, and establishes a first IP-CAN session between the P-GW and the PCRF.
- the establishment signaling of the first IP-CAN session includes the mobile network information of the UE.
- the mobile network information includes: an IP address IP-4, a port number, a protocol type, and the like allocated by the EPS network to the UE.
- the PCRF formulates a PCC policy according to the mobile network information sent by the P-GW.
- Step 611 The P-GW sends an APN/P-GW identity pair to the 3GPP HSS/AAA server by using Diameter signaling, and the 3GPP HSS/AAA server stores the identifier of the P-GW, and returns a response message to the P-GW, where the response message is sent.
- Step 612 the P-GW receives the response message returned by the 3GPP HSS/AAA server, parses out the fixed network information of the UE, and saves the first IP-CAN.
- the session modification signaling sends the obtained UE fixed network information to the PCRF, and the PCRF receives the UE fixed network information and saves the information;
- the method further includes: the PCRF modifying the PCC policy according to the acquired UE fixed network information, and sending the PCC policy to the P-GW.
- the P-GW may perform step 611 first, and then perform step 610.
- the P-GW may obtain the UE fixed network information obtained by itself, and the first IP-CAN session in step 610.
- the establishment process is sent to the PCRF, and the PCRF can generate the PCC policy according to the fixed network information and the mobile network information sent by the P-GW to the UE, and then the step 612 is not needed.
- Step 613 The P-GW returns a PBA message to the X-MAG, and carries an IP address IP-5 allocated by the EPS network to the UE.
- Step 614 The X-MAG completes the Layer 3 negotiation with the UE, and sends the IP address IP-5 allocated to the UE to the UE.
- Step 615 triggered by the establishment of the first IP-CAN session between the PCRF and the P-GW, the PCRF initiates the establishment of the first interworking policy session between itself and the BPCF, issues the relevant policy, and in the first interworking policy During the establishment of the session, the PCRF sends the UE fixed network information obtained from the P-GW to the BPCF; Step 616 to step 618, the same steps 415 to 417.
- Step 619 The X-MAG parses out the fixed network IP address IP-1 of the UE or the IP address and UDP port number converted from the IP-1 by the IP address from the Layer 3 negotiation request, and is triggered by the Layer 3 negotiation request.
- the X-MAG sends a PBU message to the P-GW, requests the tunnel binding with the P-GW, and carries the fixed network information acquired by the X-MAG in the PBU message.
- the fixed network information of the UE and the subsequent PMIPv6 tunnel is established.
- the P-GW to which the second PDN is connected may be the same as or different from the P-GW to which the first PDN is connected.
- Step 620 The P-GW receives the PBU message, allocates an IP address IP-6 to the UE, and establishes a second IP-CAN session with the PCRF.
- the PCRF formulates a PCC policy according to the mobile network information that the P-GW sends to its own UE.
- the mobile network information includes: an IP address assigned by the EPS network to the UE, an IP address, a port number, a protocol type, and the like.
- Step 621 The P-GW sends an APN/P-GW identity pair to the 3GPP HSS/AAA server through Diameter signaling, and the 3GPP HSS/AAA server stores the identifier of the P-GW, and returns a response message to the P-GW, the response message Carrying the fixed network information of the UE;
- the 3GPP HSS/AAA server may not need to send the UE fixed network information to the P-GW.
- Step 622 The P-GW receives the response message returned by the 3GPP HSS/AAA server, parses and fixes the fixed network information of the UE, and sends the fixed network information of the UE to the PCRF through the modification signaling of the second IP-CAN session. Receiving and saving the fixed network information of the UE;
- the P-GW may perform step 621 first, and then perform step 620.
- the P-GW obtains the fixed network of the UE in step 621.
- the PCRF is sent to the PCRF, and the PCRF formulates the PCC policy according to the fixed network information and the mobile network information of the UE that the P-GW sends to the UE.
- the step 622 is not required.
- the PCRF may further modify the PCC policy according to the fixed network information of the UE and send the PPC to the P-GW.
- the P-GW obtains the fixed network information of the UE from itself.
- the P-GW of the current PDN connection is the same as the P-GW connected to the first PDN in this embodiment, the P-GW may not send the fixed network information of the UE to the second IP-CAN session.
- the PCRF at this time, the PCRF can use the fixed network information of the UE obtained when the first IP-CAN session is established for the UE in this embodiment.
- the first mobility policy of the first PDN connection and the second mobility policy of the second PDN connection in this embodiment are associated with the fixed network policy session in this embodiment, respectively, so that the BPCF can guide PCRF implements the same management of fixed network resources and EPS resources.
- the UE may further establish multiple PDN connections, such as a third PDN connection and a fourth PDN connection, by using the mode of steps 618-627, and the corresponding interworking policy session in each PDN connection is as follows.
- the association mechanism between the fixed network policy sessions is the same as above.
- this embodiment is applicable to a process for establishing an attached and/or additional PDN connection when a UE accesses an EPS through a fixed network, where the fixed network serves as a trusted non-3GPP access of the EPS network, including roaming. , non-roaming and other scenarios.
- the UE in the process of the UE accessing the fixed network, the UE sends its own fixed network information to the BNG/BRAS when the fixed network authentication process and/or the local connection is established, and then, in the BNG/BRAS and the BPCF.
- the BNG/BRAS sends the fixed network information to
- the UE sends its own fixed network information to the 3GPP HSS/AAA server through the EPS authentication process, and then forwards it to the P-GW by the 3GPP HSS/AAA server.
- the P-GW is in the P-GW.
- the first IP-CAN session When the first IP-CAN session is established, it is sent to the PCRF to establish an interworking policy session between itself and the BPCF, and the fixed network information of the UE is sent to the BPCF; the BPCF obtains the fixed network information obtained from the PCRF, and according to itself The fixed network information obtained by the UE associates the first interworking policy session with the fixed network policy session; when the nth IP-CAN session is established after the subsequent additional PDN connection, the PCRF and the BPCF reuse the established interworking policy session. And modify the established interworking policy session.
- the interworking policy session between the IP-CAN session and the BPCF and the PCRF is a many-to-one association relationship, and the interworking policy session and the fixed network policy session are one-to-one association.
- Steps 701-724 are the same as steps 601-624;
- Steps 725-726 the same steps 524 to 525.
- the above four embodiments of the present invention are directed to the use of the PMIPv6 protocol between the X-MAG and the P-GW, if the GPRS tunneling protocol (GTP) is used between the X-MAG and the P-GW.
- GTP GPRS tunneling protocol
- the method provided by the present invention is also applicable. Specifically, the specific process in the GTP protocol is implemented, and only the PBU message in each process is replaced with a session request message and a message. Replace with creating a session confirmation message.
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Abstract
本发明公开了一种策略控制会话的关联方法,该方法主要包括:用户设备(UE)接入固网时,在BPCF处为所述UE建立固网策略会话,并从固网获取UE的固网信息;UE通过固网接入到移动网络时,在所述BPCF处为所述UE建立互通策略会话,并从移动网络获取所述UE的固网信息;所述BPCF根据从固网、以及移动网络获取到的UE的固网信息,将所述固网策略会话与互通策略会话进行关联。本发明还公开了一种策略控制会话的关联***,通过本发明实现了移动网络中策略控制会话与固网中策略控制会话的关联,使得通过BPCF的控制、以及PCRF和固网策略执行实体的执行,最终能够实现移动网络资源和固网资源的统一管理。
Description
一种策略控制会话的关联方法及*** 技术领域
本发明涉及移动通信及固网通信领域的策略控制, 尤其涉及一种策略 控制会话的关联方法及***。 背景技术
移动网络与固网融合的网络架构如图 1 所示, 其中, 虚线以上的部分 为移动网络部分, 虚线以下的部分为固网部分, 移动网络部分具体为第三 代合作伙伴计划 ( 3GPP, 3rd Generation Partnership Project )演进的分组系 统( EPS, Evolved Packet System ), 该 EPS由演进的通用移动通信***陆地 无线接入网 ( E-UTRAN , Evolved Universal Terrestrial Radio Access Network )、 移动管理单元 ( MME, Mobility Management Entity ), 服务网关 ( S-GW, Serving Gateway )、分组数据网络网关( P-GW, Packet Data Network Gateway ), 归属用户服务器(HSS , Home Subscriber Server ), 3GPP认证 4受权计费 ( AAA, Authentication、 Authorization、 Accounting )月良务器、 策 略和计费规则功能实体(PCRF, Policy and Charging Rules Function )及其 他支撑节点组成。 其中, MME负责移动性管理、 非接入层信令的处理、 用 户的移动管理上下文的管理等控制面的相关工作, S-GW是与 E-UTRAN相 连的接入网关设备, 在 E-UTRAN和 P-GW之间转发数据, 并且负责对寻 呼等待数据进行緩存, P-GW则是 3GPP演进的 EPS与分组数据网 ( PDN, Packet Data Network )的边界网关, 负责 PDN的接入、 以及在 EPS与 PDN 间转发数据。
其中, 固网部分主要包括路由网关 (RG, Routing Gateway ), 接入网 ( AN, Access Network )、宽带网络网关( BNG, Broadband Network Gateway )
/宽带远程接入服务器(BRAS, Broadband Remote Access Server ), 以及宽 带论坛 AAA服务器 /代理( BBF AAA Server/Proxy, Broadband Forum AAA Server/Proxy ). BPCF ( Broadband Forum Policy Control Function, 覔带论坛 策略控制功能实体), 其中, AN 可以包括数字用户线路访问多路复用器 ( DSLAM , Digital Subscriber Line Access Multiplexer )、光网络终端( ONT , Optical Network Terminal )等网元, BNG/BRAS、 BBF AAA, 以及 3GPP HSS/AAA服务器用于实现对用户设备(UE, User Equipment )接入时的认 证和授权, BNG/BRAS、 BPCF以及 EPS的 PCRF用于管理和控制固网资源。
其中, 固网和移动网络融合的网络架构还包括互通网元 (X-MAG, X-Mobility Access Gateway ), X-MAG是为了固网与移动融合而引入的一个 网元, 在图 1 所示网络架构中, 包含在固网部分, 实际应用中, 也可以放 在移动网络部分。
在图 1所示的网络架构中, UE可以通过固网部分接入到 EPS , 此时, P-GW作为 EPS与固网部分的锚点。 具体地, 固网部分通过 X-MAG接入 到 EPS的 P-GW, X-MAG与 P-GW之间通过 S2a接口相连。 当 UE接入 EPS后, UE数据通过固网部分、 X-MAG, 再经由 EPS的 P-GW到达外部 PDN, 其中, 外部 PDN具体可以是 Internet或运营商企业网等。
在 EPS中 P-GW具有策略和计费执行功能( PCEF, Policy And Charging Enforcement Function ), PCRF与 P-GW通过 Gx接***换信息, S-GW与 P-GW间的 S5接口基于代理移动 IP ν6 ( ΡΜΙΡνό )协议传输信息时, S-GW 具有承载绑定和事件报告功能( BBERF, Bearer Binding and Event Reporting Function) , S-GW与 PCRF之间通过 Gxc接***换信息。 固网的策略与计费 控制功能由 BPCF和 BNG/BRAS来实现, 具体地, BPCF用于制定策略, 由 BNG/BRAS具体执行 BPCF制定的策略。
在移动网络与固网融合的场景下, UE通过固网部分接入到 EPS时, 需
要统一管理 EPS的策略和计费与固网的策略和计费,但目前,如何建立 EPS 与固网之间策略会话的关联, 固网如何获取动态策略、 如何上报事件, 最 终如何实现对移动网络资源和固网资源的统一管理等, 都是待解决的问题。 发明内容
有鉴于此, 本发明的主要目的在于提供一种策略控制会话的关联方法 及***, 能够建立移动网络与固网之间策略会话的关联。
为达到上述目的, 本发明的技术方案是这样实现的:
本发明提供了一种策略控制会话的关联方法, 所述方法包括: UE接入 固网时, 在 BPCF处为所述 UE建立固网策略会话, 所述 BPCF从固网获取 UE的固网信息; 所述 UE通过所述固网接入到移动网络时, 在所述 BPCF 处为所述 UE建立互通策略会话, 所述 BPCF通过 HSS I AAA服务器或 X-MAG从移动网络获取 UE的固网信息; 所述 BPCF根据从固网、 以及移 动网络获取到的 UE的固网信息,将所述固网策略会话与所述互通策略会话 进行关联。
在上述方案中,所述 BPCF根据从固网和移动网络获取到的 UE的固网 信息, 将所述固网策略会话与所述互通策略会话进行关联, 包括: 所述的 固网信息包括以下信息中的一种或多种: UE的固网 ID、UE的固网 IP地址、 UE固网 IP经网络地址转换后的 IP地址加用户数据 ^艮协议( UDP )端口号; 所述 BPCF根据 UE的固网 ID、和 /或 UE的固网 IP地址、和 /或 UE固网 IP 地址经网络地址转换后的 IP地址加 UDP端口号,将所述固网策略会话与互 通策略会话进行关联。
在上述方案中 ,所述 BPCF通过 HSS/AAA服务器或 X-MAG从移动网 络获取 UE的固网信息, 包括: 所述 UE接入移动网络时, 将自身的固网信 息通过鉴权流程发送给 X-MAG, 再由该 X-MAG在当前 PDN连接的建立 过程中,将所述 UE的固网信息转发给当前 P-GW;在建立 IP-CAN会话时,
所述当前分组数据网络网关(P-GW )将所述 UE的固网信息发送给 PCRF; 在建立所述互通策略会话时,所述 PCRF将所述 UE的固网信息发送给所述 BPCF; 或者, 所述 UE接入移动网络时, 将自身的固网信息通过鉴权流程 发送给 HSS I AAA服务器, 在当前 PDN 连接的建立过程中, 再由该 HSS/AAA服务器将所述 UE的固网信息转发给 P-GW; 在建立 IP-CAN会 话时, 所述当前 P-GW将所述 UE的固网信息发送给所述 PCRF; 在建立所 述互通策略会话时, 所述 PCRF将所述 UE的固网信息发送给所述 BPCF。
在上述方案中, 在所述 BPCF处建立互通策略会话, 包括: 所述 UE建 立 PDN连接时, 当前 P-GW与所述 PCRF之间建立 IP-CAN会话, 触发当 前 PCRF发起并完成自身与所述 BPCF之间互通策略会话的建立。
在上述方案中, 在所述 UE已存在 PDN连接时, 对于附加的任意一个 PDN连接, 所述方法还包括: 当前 PCRF根据已获取到的所述 UE的固网 信息或移动网 ID, 将当前 PDN连接建立过程中的 IP-CAN会话, 关联到已 建立的、 并与所述固网策略会话已关联的互通策略会话, 复用已建立的互 通策略会话。
在上述方案中, 所述 PCRF复用已建立的互通策略会话之前, 所述方 法还包括: 所述 PCRF判断已建立的互通策略会话中, 是否有符合当前 IP-CAN会话的互通策略会话 , 如果有 , 则所述 PCRF复用与当前 IP-CAN 会话相符合的互通策略会话,否则, 当前 PCRF在自身与所述 BPCF之间建 立互通策略会话。
在上述方案中, 所述 PCRF判断已建立的互通策略会话中, 是否有符 合当前 IP-CAN会话的互通策略会话 ,包括:所述 PCRF判断之前的 IP-CAN 会话中, 是否有 IP-CAN会话中 UE的固网 IP地址、 和 /或 UE的固网 IP地 址或经 NAT转换后的 IP地址和 UDP端口号、和 /或接入类型与当前 IP-CAN 会话中相同; 如果相同, 则有符合当前 PDN连接的 IP-CAN会话的互通策
略会话, 否则, 没有符合当前 PDN连接的 IP-CAN会话的互通策略会话。 在上述方案中, 在所述 UE已存在 PDN连接时, 对于附加的任意一个 PDN连接, 复用已建立的互通策略会话之前, 所述方法还包括: 所述 PCRF 将自身在完成已存在互通策略会话的建立时, 获取到的 UE 的固网信息保 存, 在复用已建立互通策略会话时, 从自身获取 UE的固网信息; 或者, 在 复用已建立互通策略会话之前, 建立当前 IP-CAN会话时, 所述 PCRF从所 述 P-GW获取所述 UE的固网信息。
在上述方案中, 所述在 BPCF处为所述 UE建立固网策略会话, 所述 BPCF从固网获取 UE的固网信息, 包括: 所述固网中的策略执行实体发起 自身与所述 BPCF之间的固网策略会话,并将自身获取到的 UE的固网信息 发送给所述 BPCF。
在上述方案中, 所述策略执行实体发起自身与所述 BPCF之间的固网 策略会话, 获取所述 UE 的固网信息, 包括: 所述策略执行实体为 BNG/BRAS , 所述 BNG/BRAS 受到固网认证流程和 /或本地连接建立的触 发, 发起自身与所述 BPCF之间固网策略会话的建立, 并从所述 UE获取 UE的固网信息。
本发明还提供了一种策略控制会话的关联***,所述***包括: BPCF, 其中, BPCF包括第一会话建立单元、第二会话建立单元和关联单元,其中, 第一会话建立单元, 用于在 UE接入固网时, 在 BPCF处为所述 UE建立固 网策略会话, 从固网获取 UE的固网信息; 第二会话建立单元, 用于在所述 UE通过所述固网接入到移动网络时, 在所述 BPCF处为所述 UE建立互通 策略会话 , 通过 HSS I AAA服务器或 X-MAG从移动网络获取 UE的固网 信息; 关联单元, 用于根据所述第一会话建立单元、 以及第二会话建立单 元获取到的 UE 的固网信息, 将所述第一会话建立单元建立的固网策略会 话、 与所述第二会话建立单元建立的互通策略会话进行关联。
在上述方案中, 所述的固网信息包括以下信息中的一种或多种: UE的 固网 ID、 UE的固网 IP地址、经 UE固网 IP经网络地址转换后的 IP地址加 UDP端口号; 所述关联单元, 用于根据所述第一会话建立单元、 以及第二 会话建立单元获取到 UE的固网 ID、和 /或 UE的固网 IP地址、和 /或 UE固 网 IP地址经网络地址转换后的 IP地址加 UDP端口号, 将所述固网策略会 话与互通策略会话进行关联。
在上述方案中,所述***还包括:一个或多个 PCRF、一个或多个 P-GW、 以及 X-MAG和 /或 HSS / AAA服务器, 其中, X-MAG, 用于在所述 UE的 鉴权流程中获取所述 UE的固网信息, 并在当前 PDN连接的建立过程中, 将所获取到的 UE的固网信息转发给当前 PDN连接的 P-GW; HSS/AAA服 务器, 用于在所述 UE的鉴权流程中获取所述 UE的固网信息, 并在当前 PDN连接的建立过程中, 将所获取到的 UE的固网信息转发给当前 PDN连 接的 P-GW; P-GW, 用于与所述 PCRF之间建立 IP-CAN会话, 并将所述 UE的固网信息发送给所述 PCRF; PCRF, 用于在所述 UE建立当前 PDN 连接时, 发起并完成自身与所述 BPCF 的第二会话建立单元之间互通策略 会话的建立,将所述 UE的固网信息发送给所述 BPCF的第二会话建立单元。
在上述方案中, 所述 PCRF, 还用于, 在所述 UE已存在 PDN连接时, 对于附加的任意一个 PDN连接, 根据已获取到的所述 UE的固网信息或移 动网 ID , 将当前 PDN连接建立过程中的 IP-CAN会话, 关联到已建立的、 并与所述固网策略会话已关联的互通策略会话, 复用已建立的互通策略会 话。
在上述方案中, 所述***还包括: 所述固网的策略执行实体, 其中, 固网的策略执行实体, 用于发起并建立自身与所述 BPCF的第一会话建立 单元之间的固网策略会话,并将自身获取到的 UE的固网信息发送给所述第 一会话建立单元。
本发明的策略控制会话的关联方法及***,分别在 UE接入固网时,在
BPCF处建立固网策略会话, 再在 UE接入移动网络时, 在 BPCF处建立互 通策略会话, 最后再由 BPCF将上述的两个会话进行关联, 实现了移动网 络中策略控制会话与固网中策略控制会话的关联, 使得固网的策略执行实 体如 BNG/BRAS能够在策略控制会话的建立过程中, 从 BPCF动态获取到 固网的策略、 以及移动网络的策略, 并通过上述两个会话上报事件, 最终 通过 BPCF的控制、 以及 PCRF和固网策略执行实体的执行, 实现了移动网 络和固网资源的统一管理。 附图说明
图 1为移动网络与固网融合场景下的网络架构示意图;
图 2为本发明的策略控制会话关联方法的实现流程图;
图 3为本发明的策略控制会话关联***的组成结构示意图;
图 4为本发明实施例一的具体实现流程图;
图 5为本发明实施例二的具体实现流程图;
图 6为本发明实施例三的具体实现流程图;
图 7为本发明实施例四的具体实现流程图。 具体实施方式
本发明的基本思想是: UE 接入到固网, 固网中的策略执行实体如 BNG/BRAS发起自身与 BPCF之间固网策略会话的建立, 在固网策略会话 建立过程中 BPCF从策略执行实体中获取 UE的固网信息; 之后, UE通过 固网接入到移动网, 如 EPS网络, 将所述 UE的固网信息通过 EPS鉴权流 程发送给 X-MAG/3GPP AAA服务器 , 后续流程中再由 X-MAG/3GPP AAA 服务器转发给 P-GW, 建立 PDN连接时, 当前 P-GW发起 IP-CAN会话建 立, 将 UE的固网信息发送给 PCRF, 同时触发 PCRF发起与所述 BPCF之
间互通策略会话的建立, 并将 UE 的固网信息发送给 BPCF; 最后, 所述 BPCF根据 UE的固网信息将在移动网络中建立的互通策略会话、 与在固网 建立的固网策略会话进行关联。
本发明的一种策略控制会话的关联方法, 参照图 2所示, 主要包括以 下步骤:
步骤 201 : 在 UE接入固网时, 在 BPCF处为所述 UE建立固网策略会 话, 所述 BPCF从固网获取 UE的固网信息;
这里, 所述固网策略会话为固网的策略执行实体如 BNG/BRAS , 与 BPCF之间建立的、 用于传递策略和事件通知的会话。
步骤 202: 所述 UE通过固网接入到移动网络时, 在所述 BPCF处为所 述 UE建立互通策略会话 ,所述 BPCF通过归属用户 /认证授权( HSS I AAA ) 服务器或互通网元(X-MAG )从移动网络获取 UE的固网信息;
PCRF与 BPCF之间建立的、 用于传递策略和事件通知的会话。
步骤 203: 所述 BPCF根据从固网、 以及移动网络获取到的 UE的固网 信息, 将所述固网策略会话与所述互通策略会话关联。
这里, UE的固网信息可以包括以下信息中的一种或多种: UE的固网
ID、 UE的固网 IP地址、 UE固网 IP经 NAT转换后的 IP地址加用户数据报 协议( UDP )端口号、 UE的协议类型。
其中, 所述 BPCF根据获取到的 UE的固网信息, 釆用下述方式之一或 者任意组合将所述固网策略会话与所述互通策略会话关联, 包括:
( 1 )根据所述 UE的固网 ID进行关联;
( 2 )根据所述 UE的固网 IP地址 /UE固网 IP地址经网络地址转换后 的 IP地址加 UDP端口号进行关联;
( 3 )根据所述 UE的固网 ID、 UE的固网 IP地址 /经网络地址转换后的
IP地址加 UDP端口号进行关联。
其中, 步骤 201中, UE接入固网时, 在 BPCF处为所述 UE建立固网 策略会话, 所述 BPCF从固网获取 UE的固网信息, 包括: 所述固网中的策 略执行实体发起自身与所述 BPCF之间的固网策略会话, 并将自身获取到 的 UE的固网信息发送给所述 BPCF。
具体地, 所述的策略执行实体可以为 BNG/BRAS, BNG/BRAS受到固 网认证流程和 /或本地连接建立的触发, 发起自身与所述 BPCF之间固网策 略会话的建立, 并从所述 UE获取 UE的固网信息。
需要说明的是, 本发明以固网的 BNG/BRAS与 BPCF建立固网策略会 话为例阐述, 但并不排除固网中的其他网元作为策略执行实体与 BPCF建 立 "固网策略会话" 的可能, 对这样的场景, 本发明同样适用, 只要将 BNG/BRAS换成相应的策略执行实体即可。
其中, 步骤 202中, UE通过固网接入到移动网络时, 在所述 BPCF处 为所述 UE建立互通策略会话,包括:所述 UE建立 PDN连接时,当前 P-GW 与所述 PCRF之间建立 IP-CAN会话,触发当前 PCRF发起并完成自身与所 述 BPCF之间互通策略会话的建立。
其中,在所述 UE已存在 PDN连接时,对于附加的任意一个 PDN连接, 所述方法还包括: 当前 PCRF根据已获取到的所述 UE的固网信息或移动网 ID, 将当前 PDN连接建立过程中的 IP-CAN会话, 关联到已建立的、 并与 所述固网策略会话已关联的互通策略会话, 复用已建立的互通策略会话。
其中,在所述 PCRF复用已建立的互通策略会话之前,所述 PCRF需要 根据 UE的固网信息,判断已建立的互通策略会话中,是否有符合当前 PDN 连接的 IP-CAN会话的互通策略会话, 如果有, 则所述 PCRF复用与当前 IP-CAN会话相符合的互通策略会话, 否则, 所述 PCRF需要与所述 BPCF 之间建立第 n互通策略会话, 并由所述 BPCF根据 UE的固网信息, 将第 n
互通策略会话与固网策略会话进行关联。 这里, n为大于 1的整数。
具体地, 所述 PCRF判断之前的 IP-CAN会话中, 是否有 IP-CAN会话 中 UE的固网 IP地址、 和 /或 UE的固网 IP地址或经 NAT转换后的 IP地址 和 UDP端口号、 和 /或接入类型与当前 IP-CAN会话中相同; 如果相同, 则 有符合当前 IP-CAN会话的互通策略会话, 否则, 没有符合当前 PDN连接 的 IP-CAN会话的互通策略会话。
需要说明的是, 在 UE建立后续附加的 PDN连接时, 如果附加的 PDN 连接与之前的 PDN连接相比, 釆用同一 PCRF, 则当前 PCRF可以直接复 用已建立的、 并已关联到固网策略会话的互通策略会话, 还可以新建与 BPCF之间的互通策略会话,再由 BPCF将新建的互通策略会话与固网策略 会话进行关联; 否则, 当前 PCRF只能在自身与所述 BPCF之间建立互通策 略会话, 再由 BPCF将该互通策略会话与固网策略会话进行关联。
其中, 所述 BPCF通过 HSS/AAA服务器或 X-MAG从移动网络获取 UE的固网信息, 包括: 所述 UE接入移动网络时, 将自身的固网信息通过 鉴权流程发送给 X-M AG, 再由该 X-M AG在当前 PDN连接的建立过程中, 将所述 UE的固网信息转发给当前 P-GW; 在建立 IP-CAN会话时, 所述当 前分组数据网络网关 ( P-GW )将所述 UE的固网信息发送给 PCRF; 在建 立所述互通策略会话时, 所述 PCRF将所述 UE 的固网信息发送给所述 BPCF; 或者, 所述 UE接入移动网络时, 将自身的固网信息通过鉴权流程 发送给 HSS I AAA服务器, 在当前 PDN 连接的建立过程中, 再由该 HSS/AAA服务器将所述 UE的固网信息转发给 P-GW; 在建立 IP-CAN会 话时, 所述当前 P-GW将所述 UE的固网信息发送给所述 PCRF; 在建立所 述互通策略会话时, 所述 PCRF将所述 UE的固网信息发送给所述 BPCF。
在所述 UE已存在 PDN连接时,对于附加的任意一个 PDN连接, 复用 已建立的互通策略会话之前, 所述方法还包括: 所述 PCRF将自身在完成
已存在互通策略会话的建立时,获取到的 UE的固网信息保存,在复用已建 立互通策略会话时, 从自身获取 UE的固网信息; 或者, 在复用已建立互 通策略会话之前,建立当前 IP-CAN会话时, 所述 PCRF从所述 P-GW获取 所述 UE的固网信息。 这里, HSS / AAA月良务器可以是 3GPP HSS / AAA月良 务器。
在实际应用中, UE通过固网接入到移动网络, 可以建立多个 PDN连 接。 在 UE建立第一个 PDN连接时, P-GW与 PCRF之间建立第一 IP-CAN 会话,触发所述 PCRF发起自身与所述 BPCF之间第一互通策略会话的建立, PCRF完成自身与所述 BPCF之间第一互通策略会话的建立,从 P-GW获取 UE的固网信息并发送给 BPCF, 同时保存到自身, 之后, 所述 BPCF根据 UE的固网信息, 将该第一互通策略会话与上述的固网策略会话进行关联。
在所述 UE已存在 PDN连接时,对于附加的任意一个 PDN连接,如第 n个 PDN连接时, 当前 P-GW与 PCRF之间建立第 n IP-CAN会话, 触发 PCRF与所述 BPCF之间建立第 n互通策略会话 , PCRF从自身获取之前建 立互通策略会话时所保存的 UE的固网信息,或者从 P-GW获取 UE的固网 信息, 发送到 BPCF, 之后, BPCF再根据所述 UE的固网信息, 将第 n互 通策略会话与所述固网策略会话关联; 或者, 在所述 UE已存在 PDN连接 时, 对于附加的任意一个 PDN连接, 如第 n个 PDN连接时, 当前 P-GW 与 PCRF之间建立第 n IP-CAN会话 , PCRF还可以根据已获取到的所述 UE 的固网信息或移动网 ID, 将当前 PDN连接建立过程中的 IP-CAN会话, 关 联已建立的、 并与所述固网策略会话已关联的互通策略会话, 对已建立的 互通策略会话进行修改, 复用已建立的互通策略会话。
为实现上述方法, 本发明还提供了一种策略控制会话的关联***, 参 照图 3所示, 所述***主要包括 BPCF_31 , 其中, BPCF_31主要包括第一 会话建立单元 311、 第二会话建立单元 312和关联单元 313 , 其中, 第一会
话建立单元 311用于在 UE接入固网时, 在 BPCF处为所述 UE建立固网策 略会话, 从固网获取 UE的固网信息; 第二会话建立单元 312用于在所述 UE通过所述固网接入到移动网络时, 在所述 BPCF处为所述 UE建立互通 策略会话 , 通过 HSS I AAA服务器或 X-MAG从移动网络获取 UE的固网 信息; 关联单元 313用于根据所述第一会话建立单元 311、 以及第二会话建 立单元 312获取到的 UE的固网信息,将所述第一会话建立单元 311建立的 固网策略会话、 与所述第二会话建立单元 312建立的互通策略会话进行关 联。
这里, 所述关联单元 313可以用于根据所述第一会话建立单元 311、 以 及第二会话建立单元 312获取到 UE的固网 ID、 和 /或 UE的固网 IP地址、 和 /或 UE固网 IP地址经网络地址转换后的 IP地址加 UDP端口号, 将所述 固网策略会话与互通策略会话进行关联。
其中, 所述***还包括: 一个或多个 PCRF_32、一个或多个 P-GW_33、 以及 X-MAG_34和 /或 HSS I AAA服务器 35 , 其中,
X-MAG_34 , 用于在所述 UE的鉴权流程中获取所述 UE的固网信息, 并在当前 PDN连接的建立过程中, 将所获取到的 UE的固网信息转发给当 前 PDN连接的 P-GW_33 ; HSS/AAA服务器 35 , 用于在所述 UE的鉴权流 程中获取所述 UE的固网信息, 并在当前 PDN连接的建立过程中, 将所获 取到的 UE的固网信息转发给当前 PDN连接的 P-GW_33; P-GW_33用于 与所述 PCRF_32之间建立 IP-CAN会话, 并将所述 UE的固网信息发送给 所述 PCRF_32; PCRF_32用于在所述 UE建立当前 PDN连接时,发起并完 成自身与所述 BPCF_31 的第二会话建立单元 312之间互通策略会话的建 立, 并将所述 UE 的固网信息发送给所述 BPCF_31 的第二会话建立单元 312。
实际应用中, HSS/AAA服务器 35可以是 3GPP AAA服务器。
所述 PCRF_32, 还可以用于在所述 UE已存在 PDN连接时, 对于附加 的任意一个 PDN连接, 根据已获取到的所述 UE的固网信息或移动网 ID, 将当前 PDN连接建立过程中的 IP-CAN会话, 关联到已建立的、 并与所述 固网策略会话已关联的互通策略会话, 复用已建立的互通策略会话。
其中, 所述***还可以包括: 所述固网的策略执行实体 36, 固网的策 略执行实体 36用于发起并建立自身与所述 BPCF_31的第一会话建立单元 311之间的固网策略会话, 并将自身获取到的 UE的固网信息发送给所述第 一会话建立单元 311。
具体地, 固网的策略执行实体 36可以是 BNG/BRAS , BNG/BRAS受 到所述 UE 的固网认证流程和 /或本地连接建立的触发, 发起自身与所述 BPCF_31之间固网策略会话的建立, 并从所述 UE获取 UE的固网信息。
本发明中, 通过上述的策略控制会话关联***, 实现移动网络与固网 融合场景下, 移动网络中策略控制会话与固网中策略控制会话之间的关联, 具体过程参照上文方法的详细描述, 在此不再赘述。
实施例一
如图 4所示, 本实施例适用于 UE通过固网接入 EPS时, 附着 /附加的 PDN连接的建立流程, 其中, 固网作为 EPS网络的可信任非 3GPP接入, 包括了漫游、 非漫游等各种场景。
本实施例中, UE接入固网的过程中, UE在固网认证流程和 /或本地连 接建立时, 将自身的固网信息发送到 BNG/BRAS, 之后, 在 BNG/BRAS与 BPCF之间建立固网策略会话时, BNG/BRAS 再将所述固网信息发送给 BPCF; UE接入到 EPS的过程中, 通过 EPS的鉴权流程, 将自身的固网信 息发送给 X-MAG,再由 X-MAG将所述固网信息转发给 P-GW,之后 , P-GW 在建立 IP-CAN会话时 , 将该固网信息发送给 PCRF, 在 PCRF与 BPCF之 间建立互通策略会话时, PCRF 再将自身获得的 UE 的固网信息发送给
BPCF; BPCF根据从 PCRF获取到的固网信息、 以及根据自身从 UE获取 到的固网信息, 对所建立的互通策略会话和固网策略会话进行关联。
实际应用中, BNG/BRAS与 BPCF之间建立的固网策略会话, 对于每 个 UE是唯一的; 而 BPCF与 PCRF之间的互通策略会话、 以及 P-GW与 PCRF之间的 IP-CAN会话, 对于每个 PDN连接来说, 是唯一的, 而一个 UE可以建立多个 PDN连接,从而,对于同一个 UE来说,对应有多个 BPCF 和 PCRF之间的互通策略会话、以及多个 IP-CAN会话; 因此,本实施例中, 在 BPCF处, BGN/BRAS和 BPCF之间的固网策略会话、与 BPCF和 PCRF 之间的互通策略会话为一对多的关联关系。
具体地, 本实施例的具体流程如下:
步骤 401 , UE釆用传统固网认证方式通过固网认证;
步骤 402, UE与固网建立本地连接, 并获取固网为其分配的固网 IP地 址 IP- 1 , 并在此过程中, 发送 UE的固网信息到 BNG/BR AS;
步骤 403 , 由上述的本地连接建立、和 /或鉴权过程的触发, BNG/BRAS 向 BPCF发起固网策略会话的建立请求,并将在上述过程中获取到的 UE固 网信息发送给 BPCF;
其中, 通过此过程, BNG/BRAS与 BPCF之间建立申请和 /或下发动态 策略的会话, 以便 BPCF能够对固网的网络资源分配和用户接纳实现准确 控制。
在该步骤中, 所述固网信息包括 UE的固网 ID、 和 /或固网为 UE分配 的 IP地址, 还可以包括除 IP外的端口号和协议类型。 如果 BNG/BRAS从 UE 中获取到的固网信息是 UE 的固网 IP地址经网络地址转换(NAT, Network Address Translation )后得到的地址, 将经过 NAT转换后的所述 IP 地址加 UDP端口号作为 UE的固网信息, 上报给 BPCF。
步骤 404, UE向 X-MAG发送三层协商请求, 请求接入 EPS网络;
其中, 三层协商请求中包含有 UE的移动网 ID、 以及 APN等参数; 步骤 405 , X-MAG接收所述三层协商请求, 釆用基于 3GPP的认证方 式发起对 UE 的鉴权流程, 发送扩展认证协议-标识 (EAP-ID , Extensible
Authentication Protocol-Identity )请求消息给 UE;
这里, X-MAG所釆用的认证方式可以是 UMTS 身份验证和密钥协议 的可扩展身份验证协议方法( EAP-AKA, Extensible Authentication Protocol
Method for UMTS Authentication and Key Agreement )等基于 3GPP的认证方 式。
步骤 406, UE接收 EAP-ID请求消息, 向 X-MAG返回 EAP-ID响应消 息, 并在 EAP-ID响应消息中携带 UE的固网信息, X-MAG再将 EAP-ID 响应消息转发给 3GPP HSS/AAA服务器;
具体地,在所述 UE的固网信息为 UE的固网 ID时, UE可以将自身的 固网信息直接包含在 EAP-ID响应消息的标识字段中携带,此时 UE的固网 信息作为 UE的伪标识使用; 或者, UE也可以通过扩展 EAP-ID响应消息, 将自身的固网信息作为 EAP-ID响应消息的一个新字段携带;
在 UE的固网信息为 UE的固网 IP地址、或 UE固网 IP地址经 NAT转 换后得到的 IP地址和端口号时, UE可以通过扩展 EAP-ID响应消息, 将自 身的固网信息作为 EAP-ID响应消息的一个新字段携带;
在 UE的固网信息包含有 UE的固网 IP地址和固网 ID、或者包含有 UE 固网 IP地址经 NAT转换后得到的 IP地址和端口号、 以及固网 ID时, UE 通过扩展 EAP-ID响应消息, 将自身的固网信息作为 EAP-ID响应消息的一 个新字段携带。
步骤 407 , X-MAG从 UE返回的 EAP-ID响应消息中 ,获取 UE的固网 信息并保存;
步骤 408,继续后续的 3GPP接入鉴权流程,如 EAP-AKA的鉴权流程;
步骤 409, X-MAG从三层协商请求的 IP包头中, 解析出 UE的固网 IP 地址 IP-1、 或固网 IP地址 IP-1经 NAT转换后的 IP地址和 UDP端口号, 并发送 PBU ( ΡΜΙΡνό绑定请求)消息给 P-GW,请求与 P-GW的隧道绑定, 并在该 PBU消息中携带已获取的 UE固网信息, 使得 UE的固网信息与后 续要建立的 ΡΜΙΡν6隧道之间存在对应关系;
这里 , X-MAG作为要建立的 PMIPv6隧道的移动锚点网关。
步骤 410, P-GW接收到 X-MAG发送的 PBU消息后 , 为 UE分配 EPS 网络的 IP地址 IP-2, P-GW与 PCRF之间建立第一网络协议连通接入网 ( IP-CAN , IP-Connectivity Access Network )会话, 并从所述 PBU消息中 解析出 UE的固网信息, 通过第一 IP-CAN会话的建立信令将解析出的 UE 固网信息发送给 PCRF;
其中, 第一 IP-CAN会话的建立信令还包含有 UE的移动网信息, 具体 地, UE的移动网信息包括: EPS为 UE分配的 IP地址 IP-2、 端口号、 协议 类型等。
在 P-GW与 PCRF之间建立第一 IP-CAN会话的过程中, PCRF根据 P-GW发送的 UE 的固网信息和移动网信息制定策略与计费控制 (PCC, Policy and Charging Control )策略。
步骤 411 , P-GW通过 Diameter信令向 3GPP HSS/AAA服务器发送 APN/P-GW标识对, 3GPP HSS/AAA服务器存储该 P-GW的标识,完成 P-GW 的标识更新;
步骤 412, P-GW向 X-MAG返回 PBA ( ΡΜΙΡνό绑定确认 ) 消息, 并 在该消息中携带为 UE分配的 IP地址 IP-2;
步骤 413 , X-MAG与 UE完成三层协商, 并将为 UE分配的移动网 IP 地址 IP-2发送给 UE;
这里, X-MAG可以通过自身与 UE进行三层协商时的信令,将所述 IP-2
发送给 UE, 也可以在完成三层协商之后, 通过新定义的信令或其他已有的 信令, 将所述 IP-2发送给 UE。
步骤 414,受到 PCRF与 P-GW之间建立第一 IP-CAN会话的触发, PCRF 发起自身与 BPCF之间第一互通策略会话的建立操作, PCRF将自身从 P-GW处获取的固网信息发送给 BPCF;
具体地, 在建立第一互通策略会话过程中, PCRF向所述 BPCF下发相 关的策略。
步骤 415 , BPCF与 PCRF建立第一互通策略会话之后, 根据从 PCRF 处获取的 UE固网信息、 以及从 BNG/BRAS处获取的 UE固网信息, 将自 身与 BNG/BRAS之间的固网策略会话、 和自身与 PCRF之间的第一互通策 略会话进行关联;
具体地, UE的固网信息可以包括 UE的固网 ID、和 /或固网为 UE分配 的 IP地址 IP-1、 和 /或 IP-1经 NAT转换后的 IP地址和 UDP端口号, 具体 地, 可以依据下述三种方案中任意一个或任意多个的组合, 完成上述关联:
1 ) BPCF根据 UE固网信息中 UE的固网 ID, 将固网策略会话和第一 互通策略会话关联;
2 )BPCF根据 UE固网信息中固网为 UE分配的 IP地址 IP-1、和 /或 IP-1 经 NAT转换后的 IP地址和 UDP端口号, 将固网策略会话和第一互通策略 会话关联;
3 ) BPCF根据 UE固网信息中 UE的固网 ID、 以及固网为 UE分配的 IP地址 IP-1、 和 /或 IP-1经 NAT转换后的 IP地址和 UDP端口号, 将固网 策略会话和第一互通策略会话关联。
这里, PCRF与 BPCF之间建立第一互通策略会话时, PCRF向 BPCF 下发相关的策略, BPCF会根据实际情况更新 BNG/BRAS 的相关策略, BNG/BRAS会根据更新后的策略执行相应的操作, 从而使得固网能够动态
获取策略, 使得对移动资源和固网资源的统一管理能够实现。
步骤 416, UE完成第一个 PDN连接, 与服务器之间建立数据通道, 开 始收发数据包;
步骤 417, UE开始建立附加 PDN连接, 第二个 PDN连接, 向 X-MAG 发送三层协商请求;
这里, 三层协商请求中包含有 UE的移动网 ID、 APN等参数, 其中, UE的 APN参数可以不同于第一个 PDN连接建立时的 APN , 也可以相同。
步骤 418 , X-MAG接收到 UE发送的三层协商请求之后, 从自身获取 UE的固网信息;
由于在第一 PDN连接建立过程中, X-MAG已经将获取到的 UE的固 网信息进行保存, 因此, 这里, X-MAG能够从自身获取到 UE的固网信息。
步骤 419, X-MAG从三层协商请求的 IP包头中, 解析出 UE的固网 IP 地址 IP-1、 或者 IP-1经 NAT转换后的 IP地址和 UDP端口号, 并发送 PBU 消息给 P-GW, 请求与 P-GW的隧道绑定, 并在该 PBU消息中携带自身所 获取的 UE固网信息, 以便建立 UE固网信息与后续要建立的 PMIPv6隧道 之间的对应关系;
这里, 实际应用中, 附加的第二 PDN连接的 P-GW与第一个 PDN连 接的 P-GW可能相同, 也可能不同。
如果附加的第二个 PDN连接的 P-GW与第一个 PDN连接的 P-GW相 同, 由于在上述步骤中, P-GW 已经获取到 UE 固网信息并保存, 因此, X-MAG在 PBU消息中可以不携带固网信息; 如果附加的第二个 PDN连接 的 P-GW与第一个 PDN连接的 P-GW不同, X-MAG则需要在 PBU消息中 携带 UE的固网信息,才能使得对应于第二个 PDN连接的 P-GW获取到 UE 固网信息。
步骤 420: P-GW接收到 X-MAG发送的 PBU消息后, 为 UE分配 EPS
网络中的 IP地址 IP-3 , P-GW与 PCRF之间建立第二 IP-CAN会话; 这里, 如果 PBU消息中携带有 UE固网信息, P-GW需要解析出其中 的 UE固网信息, 随后通过第二 IP-CAN会话建立信令将 UE固网信息发送 给 PCRF; 如果 PBU消息中不携带 UE固网信息, P-GW将自身保存的、 在 上述建立第一 IP-CAN会话时获取到的 UE固网信息, 通过第二 IP-CAN会 话建立信令发送给 PCRF。
如果当前的第二 PDN连接中 , P-GW所选择的 PCRF与上述第一 PDN 连接的 PCRF相同,由于 PCRF在上述第一 PDN连接的过程中,已经从 P-GW 获取到了 UE固网信息, 因此, P-GW在建立第二 IP-CAN会话时, 可以不 向 PCRF发送 UE固网信息, 此时 , PCRF可以根据在建立第一 IP-CAN会 话时获得的 UE固网信息、 以及在建立第二 IP-CAN会话时 P-GW发送的 UE移动网信息, 制定 PCC策略; 如果当前的第二 PDN连接中, P-GW所 选择的 PCRF与上述第一 PDN连接的不同, P-GW需要在建立第二 IP-CAN 会话时, 向 PCRF发送 UE固网信息, 使得 PCRF根据该 UE的固网信息、 以及 UE的移动网信息, 制定 PCC策略。
这里, 所述的移动网信息包括: EPS网络为 UE分配的 IP地址 IP-3、 端口号、 协议类型等参数。
步骤 421 : P-GW通过 Diameter信令向 3GPP HSS/AAA服务器发送 APN/P-GW标识对, 3GPP HSS/AAA服务器存储该 P-GW的标识,完成 P-GW 的标识更新;
步骤 422: P-GW向 X-MAG返回 PBA消息 , 并在该消息中携带为 UE 分配的 IP地址 IP-3;
步骤 423: X-MAG与 UE完成三层协商 , 将为 UE分配的 IP地址 IP-3 发送给 UE;
步骤 424 ,受到 PCRF与 P-GW之间建立第二 IP-CAN会话的触发, PCRF
发起自身与 BPCF之间第二互通策略会话的建立操作, 并将自身获取到的
UE固网信息发送给 BPCF;
这里, 在第二互通策略会话的建立过程中, PCRF从 P-GW获取 UE固 网信息,则将获取到的 UE固网信息发送给 BPCF;如果 PCRF在与该 P-GW 建立第二 IP-CAN会话时, 没有从 P-GW获取 UE固网信息, 则 PCRF通过 获取到 UE的移动网 ID找到自身已保存的 UE固网信息, 并发送给 BPCF。
步骤 425: BPCF与 PCRF建立第二互通策略会话之后, 根据从 PCRF 处获取的 UE固网信息、 以及从 BNG/BRAS获取到的 UE固网信息, 将所 述固网策略会话、 与当前的第二策略会话进行关联。
这里, 关联的具体方法与步骤 415相同。
步骤 426: UE完成附加的第二 PDN连接的建立, 并建立数据通道, 开 始收发数据包。
至此, BPCF处, 分别将本实施例中第一 PDN连接的第一互通策略会 话、 和第二 PDN连接的第二互通策略会话, 与固网策略会话进行了关联。
本实施例中, UE还可以在上述操作之后, 通过步骤 417-426的模式, 再建立第三 PDN连接、第四 PDN连接 等多个附加 PDN连接,各 PDN 连接中对应的互通策略会话与上述的固网策略会话之间的关联机制同上。
实施例二
如图 5所示, 本实施例适用于 UE通过固网接入 EPS时, 附着 /附加的 PDN连接的建立流程, 其中, 固网作为 EPS网络的可信任非 3GPP接入, 包括了漫游、 非漫游等各种场景。
在本实施例中 , UE接入到固网时, BNG/BRAS发起固网策略会话的建 立; UE接入到 EPS网络, 建立第一个 PDN连接时, P-GW发起 IP-CAN 会话建立, 受到触发的 PCRF会对应发起第一互通策略会话的建立, 之后, BPCF将第一互通策略会话和固网策略会话进行关联; 后续再有附加 PDN
连接建立, PCRF复用已经建立的第一互通策略会话,并对该会话进行修改。 具体地, UE在接入固网时, UE接入固网的过程中, UE在固网认证流 程和 /或本地连接建立时, 将自身的固网信息发送到 BNG/BRAS , 之后, 在 BNG/BRAS与 BPCF之间建立固网策略会话时 , BNG/BRAS再将所述固网 信息发送给 BPCF; UE接入到 EPS的过程中, 通过 EPS的鉴权流程, 将自 身的固网信息发送给 X-MAG,再由 X-MAG将所述固网信息转发给 P-GW, 之后, P-GW在建立 IP-CAN会话时,将该固网信息发送给 PCRF,在 PCRF 与 BPCF之间建立第一互通策略会话时, PCRF再将自身获得的固网信息发 送给 BPCF; BPCF根据从 PCRF获取到的固网信息、 以及根据自身从 UE 获取到的固网信息, 对第一互通策略会话和固网策略会话进行关联; 在后 续附加 PDN连接时, 建立第 n IP-CAN会话时, PCRF和 BPCF复用已建立 的第一互通策略会话, 对第一互通策略会话进行修改。
在本实施例中, 在 BPCF处, IP-CAN会话和 BPCF和 PCRF之间的互 通策略会话为多对一的关联关系, 互通策略会话与固网策略会话是一对一 的关联关系。
具体地, 本实施例的具体流程如下:
步骤 501- 523: 同步骤 401-423;
步骤 524 ,受到 PCRF与 P-GW之间建立第二 IP-CAN会话的触发, PCRF 根据已获取到的 UE的固网信息或者移动网 ID, 查找到已建立的、 与第二 IP-CAN会话相符合的第一互通策略会话, 并将第二 IP-CAN会话关联到第 一互通策略会话上;
这里 , 在第一 PDN连接的 PCRF与第二 PDN连接的 PCRF相同时, PCRF判断自身与 BPCF之间已有的互通策略会话, 是否符合第二 IP-CAN 会话, 判断方法具体可以釆用以下四种方案的任意一个或任意多个的组合:
1 ) PCRF判断第一 IP-CAN会话与第二 IP-CAN会话中, UE的固网 ID
是否相同, 相同则符合, 否则不符合;
2 ) PCRF判断第一 IP-CAN会话与第二 IP-CAN会话中, UE的固网 IP 地址、或 UE固网 IP地址经 NAT转换后的 IP地址和 UDP端口号是否相同, 相同则符合, 否则不符合;
3 )PCRF判断第一 IP-CAN会话与第二 IP-CAN会话中, UE的固网 ID、 以及 UE的固网 IP地址或 UE固网 IP地址经 NAT转换后的 IP地址和 UDP 端口号是否相同, 相同则符合, 否则不符合;
4 )PCRF判断第一 IP-CAN会话与第二 IP-CAN会话中, UE的固网 ID、 接入类型是否相同、 以及所述接入类型是否是固网接入, 如果是则符合, 否则不符合;
这里, PCRF复用第一互通策略会话的过程中, 发起第一互通策略会话 的修改流程,向 BPCF下发相关的策略, BPCF会根据实际情况向 BNG/BRAS 更新策略, BNG/BR AS会根据更新的策略执行相应的操作。
步骤 525: 用户完成附加第二 PDN连接的建立, 并建立数据通道, 开 始收发数据包。
至此, BPCF处, 对应于两个 PDN连接的两个 IP-CAN会话, 对应于 BPCF与 PCRF之间的第一互通策略会话, 而 BPCF与 PCRF之间的第一策 略会话、与 BPCF与 BNG/BRAS之间的固网策略会话之间为——对应关系。
本实施例中, UE还可以在上述操作之后, 通过步骤 517-525的模式, 再建立第三 PDN连接、第四 PDN连接 等多个附加 PDN连接,各 PDN 连接中对应同一个互通策略会话, 互通策略会话与固网策略会话之间的关 联机制同上。
实施例三
如图 6所示, 本实施例适用于 UE通过固网接入 EPS时, 附着 /附加的 PDN连接的建立流程, 其中, 固网作为 EPS网络的可信任非 3GPP接入,
包括了漫游、 非漫游等各种场景。
在本实施例中, UE接入固网的过程中, UE在固网认证流程和 /或本地 连接建立时, 将自身的固网信息发送到 BNG/BRAS , 之后, 在 BNG/BRAS 与 BPCF之间建立固网策略会话时, BNG/BRAS再将所述固网信息发送给 BPCF; UE在附着到 EPS的过程中, 通过 EPS的鉴权流程, 将自身的固网 信息发送给 3GPP AAA服务器,再由 3GPP AAA服务器转发给 P-GW, P-GW 在建立或修改 IP-CAN会话时, 发送给 PCRF, 在自身与 BPCF之间建立互 通策略会话, 并将 UE的固网信息发送给 BPCF; 最后, BPCF根据 UE的 固网信息, 将自身与 PCRF之间的互通策略会话、 和自身与 BNG/BRAS 之 间的固网策略会话进行关联。
本实施例中 , BGN/BRAS与 BPCF之间的固网策略会话、 和 BPCF与 PCRF之间的互通策略会话之间是一对多的关联关系。
本实施例的具体步骤为:
步骤 601至 606, 同步骤 401至 406;
步骤 607 , 3GPP HSS/AAA服务器接收所述 EAP-ID响应消息, 从中获 取固网信息并保存;
步骤 608, 与步骤 408相同;
步骤 609, X-MAG从三层协商请求中,解析出 UE的固网 IP地址 IP-1 , 或者从其中的 IP包头中获取 UE在固网获取的 IP地址 IP-1或者经 NAT转 换后的 IP地址和 UDP端口号, 并由于三层协商请求的触发, X-MAG作为 要建立的 PMIPv6隧道的移动锚点网关, 发送 PBU消息给 P-GW, 请求与 P-GW的隧道绑定, 并在该 PBU消息中携带自身所获取的固网信息, 以便 使得 UE的固网信息与后续要建立的 PMIPv6隧道之间存在对应关系;
步骤 610, P-GW接收所述 PBU消息 , EPS网络为 UE分配 IP地址 IP-4, P-GW与 PCRF之间建立第一 IP-CAN会话;
其中, 第一 IP-CAN会话的建立信令中包含有 UE的移动网信息, 具体 地, 移动网信息包括: EPS网络为 UE分配的 IP地址 IP-4、 端口号、 协议 类型等。
在 P-GW与 PCRF之间建立第一 IP-CAN会话的过程中, PCRF根据 P-GW发送的移动网信息制定 PCC策略。
步骤 611 , P-GW通过 Diameter信令向 3GPP HSS/AAA服务器发送 APN/P-GW标识对, 3GPP HSS/AAA服务器存储该 P-GW的标识,并向 P-GW 返回响应消息,该响应消息中携带 UE的固网信息,完成 P-GW的标识更新; 步骤 612, P-GW接收 3GPP HSS/AAA服务器返回的响应消息,解析出 其中的 UE固网信息并保存,通过第一 IP-CAN会话的修改信令将获取到的 UE固网信息发送给 PCRF, PCRF接收该 UE固网信息并保存;
这里, 可选地, 还可以包括: PCRF根据获取到的 UE固网信息, 修改 所述 PCC策略, 并发送给 P-GW。
可选的, P-GW接收到 PBU消息后, 可以先执行步骤 611 , 再执行步 骤 610, 此时, P-GW可以将自身获取的 UE固网信息, 在步骤 610中第一 IP-CAN会话的建立流程中发送给 PCRF , PCRF可以根据 P-GW发送给 UE 固网信息和移动网信息, 制定 PCC策略, 此时就不需要再在执行步骤 612。
步骤 613 , P-GW向 X-MAG返回 PBA消息, 并携带 EPS网络为 UE 分配的 IP地址 IP-5;
步骤 614, X-MAG与 UE完成三层协商 , 将为 UE分配的 IP地址 IP-5 发送给 UE;
步骤 615 ,受到 PCRF与 P-GW之间建立第一 IP-CAN会话的触发, PCRF 发起自身与 BPCF之间第一互通策略会话的建立操作, 下发相关的策略, 并在该第一互通策略会话的建立过程中, PCRF将自身从 P-GW获取的 UE 固网信息发送给 BPCF;
步骤 616至步骤 618 , 同步骤 415至 417。
步骤 619, X-MAG从三层协商请求中,解析出 UE的固网 IP地址 IP-1、 或者从 IP-1经 NAT转换后的 IP地址和 UDP端口号, 并由于三层协商请求 的触发, X-MAG作为要建立的 PMIPv6隧道的移动锚点网关, 发送 PBU 消息给 P-GW, 请求与 P-GW的隧道绑定, 并在该 PBU消息中携带自身所 获取的固网信息,以便使得 UE的固网信息与后续要建立的 PMIPv6隧道之 间存在对应关系。
这里, 实际应用中, 附加的第二 PDN连接的 P-GW与第一个 PDN连 接的 P-GW可能相同, 也可能不同。
步骤 620: P-GW接收所述 PBU消息 , 为 UE分配 IP地址 IP-6, 并与 PCRF建立第二 IP-CAN会话。
其中, PCRF根据 P-GW发送给自身的 UE的移动网信息, 制定 PCC 策略。 其中, 移动网信息包括: EPS网络为 UE分配的 IP地址 IP-6、 端口 号、 协议类型等。
步骤 621 : P-GW通过 Diameter信令向 3GPP HSS/AAA服务器发送 APN/P-GW标识对, 3GPP HSS/AAA服务器存储该 P-GW的标识,并向 P-GW 返回响应消息, 该响应消息携带 UE的固网信息;
如果当前第二 PDN连接的 P-GW与上述的第一 PDN连接的 P-GW相 同, 则 3GPP HSS/AAA服务器可以不需要将 UE固网信息发送给 P-GW。
步骤 622 , P-GW接收 3GPP HSS/AAA服务器返回的响应消息,从中解 析出 UE的固网信息并保存, 通过第二 IP-CAN会话的修改信令将 UE的固 网信息发送给 PCRF, PCRF接收并保存 UE的固网信息;
可选的, 对于步骤 620-622的处理过程, P-GW接收所述 PBU消息之 后, 也可以先执行步骤 621 , 再执行步骤 620, 此时, P-GW在步骤 621中 获取 UE的固网信息并保存,随后将 UE固网信息在步骤 620中第二 IP-CAN
会话的建立过程中, 发送给 PCRF, PCRF根据 P-GW发送给自身的 UE的 固网信息和移动网信息, 制定 PCC策略, 在该场景中不需要再在执行步骤 622。
这里, 还可以包括, PCRF根据所述 UE的固网信息, 修改 PCC策略 并发送给 P-GW。
其中,如果所述响应消息中未携带 UE的固网信息,则 P-GW从自身获 取 UE的固网信息。
如果当前第二 PDN连接的 P-GW与本实施例中的第一 PDN连接的 P-GW相同, 则 P-GW在修改第二 IP-CAN会话时, 可以不将 UE的固网信 息发送给 PCRF,此时, PCRF可以使用本实施例中为 UE建立第一 IP-CAN 会话时, 获得的 UE的固网信息。
步骤 623至步骤 627 , 同步骤 422至步骤 426。
至此, BPCF处, 分别将本实施例中第一 PDN连接的第一移动策略、 和第二 PDN连接的第二移动策略, 与本实施例中的固网策略会话进行了关 联, 使得 BPCF能够指导 PCRF, 实现固网资源和 EPS资源的同一管理。
本实施例中, UE还可以在上述操作之后, 通过步骤 618-627的模式, 再建立第三 PDN连接、第四 PDN连接 等多个附加 PDN连接,各 PDN 连接中对应的互通策略会话与上述的固网策略会话之间的关联机制同上。
实施例四
如图 7所示, 本实施例适用于 UE通过固网接入 EPS时, 附着和 /或附 加的 PDN连接的建立流程, 其中, 固网作为 EPS网络的可信任非 3GPP接 入, 包括了漫游、 非漫游等各种场景。
在本实施例中, UE接入固网的过程中, UE在固网认证流程和 /或本地 连接建立时, 将自身的固网信息发送到 BNG/BRAS , 之后, 在 BNG/BRAS 与 BPCF之间建立固网策略会话时, BNG/BRAS再将所述固网信息发送给
BPCF; UE在接入到 EPS的过程中, 通过 EPS的鉴权流程, 将自身的固网 信息发送给 3GPP HSS/AAA服务器, 再由 3GPP HSS/AAA服务器转发给 P-GW, P-GW在建立第一 IP-CAN会话时, 发送给 PCRF, 在自身与 BPCF 之间建立互通策略会话, 并将 UE的固网信息发送给 BPCF; BPCF根据从 PCRF获取到的固网信息、 以及根据自身从 UE获取到的固网信息, 对第一 互通策略会话和固网策略会话进行关联; 在后续附加 PDN连接时, 建立第 n IP-CAN会话时, PCRF和 BPCF复用已建立的互通策略会话, 并对已建 立的互通策略会话进行修改。
本实施例中, 在 BPCF处, IP-CAN会话和 BPCF与 PCRF之间的互通 策略会话为多对一的关联关系, 互通策略会话与固网策略会话是一对一的 关联关系。
具体地, 本实施例的具体流程如下:
步骤 701- 724同步骤 601-624;
步骤 725- 726 , 同步骤 524至步骤 525。
需要说明的是, 本发明的上述四个实施例, 均是针对 X-MAG和 P-GW 之间釆用 PMIPv6协议的情况,如果 X-MAG和 P-GW之间釆用 GPRS隧道 协议( GTP , GPRS Tunnelling Protocol )协议, 本发明所提供的方法同样适 用, 具体地, 釆用 GTP协议时的具体流程实现, 只需要将上述各流程中的 PBU消息替换成创建会话请求消息、 以及将 ΡΒΑ消息替换成创建会话确认 消息。
以上所述, 仅为本发明的较佳实施例而已, 并非用于限定本发明的保 护范围, 凡在本发明的精神和原则之内所作的任何修改、 等同替换和改进 等, 均应包含在本发明的保护范围之内。
Claims
1、 一种策略控制会话的关联方法, 其特征在于, 所述方法包括: 用户设备 ( UE )接入固网时, 在宽带论坛策略控制功能实体(BPCF ) 处为所述 UE建立固网策略会话, 所述 BPCF从固网获取 UE的固网信息; 所述 UE通过所述固网接入到移动网络时, 在所述 BPCF处为所述 UE 建立互通策略会话, 所述 BPCF通过归属用户 /认证授权计费 (HSS / AAA ) 服务器或互通网元(X-MAG )从移动网络获取 UE的固网信息;
所述 BPCF根据从固网、 以及移动网络获取到的 UE的固网信息,将所 述固网策略会话与所述互通策略会话进行关联。
2、 根据权利要求 1所述的策略控制会话的关联方法, 其特征在于, 所 述 BPCF根据从固网和移动网络获取到的 UE的固网信息,将所述固网策略 会话与所述互通策略会话进行关联, 包括:
所述的固网信息包括以下信息中的一种或多种: UE的固网 ID、 UE的 固网 IP地址、 UE固网 IP经网络地址转换后的 IP地址加用户数据 ^艮协议 ( UDP )端口号;
所述 BPCF根据 UE的固网 ID、 和 /或 UE的固网 IP地址、 和 /或 UE固 网 IP地址经网络地址转换后的 IP地址加 UDP端口号, 将所述固网策略会 话与互通策略会话进行关联。
3、 根据权利要求 1所述的策略控制会话的关联方法, 其特征在于, 所 述 BPCF通过 HSS/AAA服务器或 X-MAG从移动网络获取 UE的固网信息 , 包括:
所述 UE接入移动网络时, 将自身的固网信息通过鉴权流程发送给 X-MAG, 再由该 X-MAG在当前 PDN连接的建立过程中, 将所述 UE的固 网信息转发给当前 P-GW; 在建立 IP-CAN会话时, 所述当前分组数据网络 网关 ( P-GW )将所述 UE的固网信息发送给 PCRF; 在建立所述互通策略 会话时 , 所述 PCRF将所述 UE的固网信息发送给所述 BPCF; 或者, 所述 UE接入移动网络时,将自身的固网信息通过鉴权流程发送 给 HSS / AAA服务器, 在当前 PDN连接的建立过程中, 再由该 HSS/AAA 服务器将所述 UE的固网信息转发给 P-GW; 在建立 IP-CAN会话时, 所述 当前 P-GW将所述 UE的固网信息发送给所述 PCRF; 在建立所述互通策略 会话时, 所述 PCRF将所述 UE的固网信息发送给所述 BPCF。
4、 根据权利要求 1至 3任一项所述的策略控制会话的关联方法, 其特 征在于, 在所述 BPCF处建立互通策略会话, 包括:
所述 UE建立 PDN连接时,当前 P-GW与所述 PCRF之间建立 IP-CAN 会话, 触发当前策略和计费规则功能实体(PCRF )发起并完成自身与所述 BPCF之间互通策略会话的建立。
5、 根据权利要求 1至 3任一项所述的策略控制会话的关联方法, 其特 征在于, 在所述 UE已存在 PDN连接时, 对于附加的任意一个 PDN连接, 所述方法还包括:
当前 PCRF才艮据已获取到的所述 UE的固网信息或移动网 ID, 将当前 PDN连接建立过程中的 IP-CAN会话, 关联到已建立的、 并与所述固网策 略会话已关联的互通策略会话, 复用已建立的互通策略会话。
6、 根据权利要求 5所述的策略控制会话的关联方法, 其特征在于, 所 述 PCRF 复用已建立的互通策略会话之前, 所述方法还包括: 所述 PCRF 判断已建立的互通策略会话中,是否有符合当前 IP-CAN会话的互通策略会 话,如果有,则所述 PCRF复用与当前 IP-CAN会话相符合的互通策略会话, 否则, 当前 PCRF在自身与所述 BPCF之间建立互通策略会话。
7、 根据权利要求 6所述的策略控制会话的关联方法, 其特征在于, 所 述 PCRF判断已建立的互通策略会话中,是否有符合当前 IP-CAN会话的互 通策略会话, 包括: 所述 PCRF判断之前的 IP-CAN会话中, 是否有 IP-CAN会话中 UE的 固网 IP地址、 和 /或 UE的固网 IP地址或经 NAT转换后的 IP地址和 UDP 端口号、 和 /或接入类型与当前 IP-CAN会话中相同; 如果相同, 则有符合 当前 PDN连接的 IP-CAN会话的互通策略会话, 否则, 没有符合当前 PDN 连接的 IP-CAN会话的互通策略会话。
8、 根据权利要求 5所述的策略控制会话的关联方法, 其特征在于, 在 所述 UE已存在 PDN连接时,对于附加的任意一个 PDN连接, 复用已建立 的互通策略会话之前, 所述方法还包括:
所述 PCRF将自身在完成已存在互通策略会话的建立时, 获取到的 UE 的固网信息保存,在复用已建立互通策略会话时,从自身获取 UE的固网信 息;
或者, 在复用已建立互通策略会话之前, 建立当前 IP-CAN会话时, 所 述 PCRF从所述 P-GW获取所述 UE的固网信息。
9、 根据权利要求 1至 3任一项所述的策略控制会话的关联方法, 其特 征在于, 所述在 BPCF处为所述 UE建立固网策略会话, 所述 BPCF从固网 获取 UE的固网信息, 包括:
所述固网中的策略执行实体发起自身与所述 BPCF之间的固网策略会 话, 并将自身获取到的 UE的固网信息发送给所述 BPCF。
10、 根据权利要求 9所述的策略控制会话的关联方法, 其特征在于, 所述策略执行实体发起自身与所述 BPCF之间的固网策略会话, 获取所述 UE的固网信息, 包括:
所述策略执行实体为宽带网络网关 /宽带远程接入服务器 ( BNG/BRAS ), 所述 BNG/BRAS受到固网认证流程和 /或本地连接建立的 触发,发起自身与所述 BPCF之间固网策略会话的建立, 并从所述 UE获取 UE的固网信息。
11、一种策略控制会话的关联***,其特征在于,所述***包括: BPCF, 其中, BPCF包括第一会话建立单元、第二会话建立单元和关联单元,其中, 第一会话建立单元, 用于在 UE接入固网时, 在 BPCF处为所述 UE建 立固网策略会话, 从固网获取 UE的固网信息;
第二会话建立单元, 用于在所述 UE通过所述固网接入到移动网络时, 在所述 BPCF处为所述 UE建立互通策略会话, 通过 HSS I AAA服务器或 X-MAG从移动网络获取 UE的固网信息;
关联单元, 用于根据所述第一会话建立单元、 以及第二会话建立单元 获取到的 UE的固网信息, 将所述第一会话建立单元建立的固网策略会话、 与所述第二会话建立单元建立的互通策略会话进行关联。
12、 根据权利要求 11所述策略控制会话的关联***, 其特征在于, 所述的固网信息包括以下信息中的一种或多种: UE的固网 ID、 UE的 固网 IP地址、 经 UE固网 IP经网络地址转换后的 IP地址加用户数据 ^艮协 议 ( UDP )端口号;
所述关联单元, 用于根据所述第一会话建立单元、 以及第二会话建立 单元获取到 UE的固网 ID、 和 /或 UE的固网 IP地址、 和 /或 UE固网 IP地 址经网络地址转换后的 IP地址加 UDP端口号,将所述固网策略会话与互通 策略会话进行关联。
13、 根据权利要求 12所述策略控制会话的关联***, 其特征在于, 所 述***还包括: 一个或多个 PCRF、 一个或多个 P-GW、 以及 X-MAG和 / 或 HSS / AAA服务器, 其中,
X-MAG, 用于在所述 UE的鉴权流程中获取所述 UE的固网信息, 并 在当前 PDN连接的建立过程中, 将所获取到的 UE的固网信息转发给当前 PDN连接的 P-GW;
HSS/AAA服务器, 用于在所述 UE的鉴权流程中获取所述 UE的固网 信息, 并在当前 PDN连接的建立过程中, 将所获取到的 UE的固网信息转 发给当前 PDN连接的 P-GW;
P-GW, 用于与所述 PCRF之间建立 IP-CAN会话 , 并将所述 UE的固 网信息发送给所述 PCRF;
PCRF, 用于在所述 UE建立当前 PDN连接时,发起并完成自身与所述 BPCF的第二会话建立单元之间互通策略会话的建立, 并将所述 UE的固网 信息发送给所述 BPCF的第二会话建立单元。
14、 根据权利要求 13所述策略控制会话的关联***, 其特征在于, 所 述 PCRF, 还用于,
在所述 UE已存在 PDN连接时,对于附加的任意一个 PDN连接,根据 已获取到的所述 UE的固网信息或移动网 ID,将当前 PDN连接建立过程中 的 IP-CAN会话, 关联到已建立的、并与所述固网策略会话已关联的互通策 略会话, 复用已建立的互通策略会话。
15、 根据权利要求 11至 14任一项所述策略控制会话的关联***, 其 特征在于, 所述***还包括: 所述固网的策略执行实体, 其中,
固网的策略执行实体, 用于发起并建立自身与所述 BPCF的第一会话 建立单元之间的固网策略会话,并将自身获取到的 UE的固网信息发送给所 述第一会话建立单元。
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