CN102761852B - A kind of method and system for obtaining roaming information - Google Patents
A kind of method and system for obtaining roaming information Download PDFInfo
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- CN102761852B CN102761852B CN201110107414.0A CN201110107414A CN102761852B CN 102761852 B CN102761852 B CN 102761852B CN 201110107414 A CN201110107414 A CN 201110107414A CN 102761852 B CN102761852 B CN 102761852B
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Abstract
Roaming information is passed into P GW the invention discloses a kind of method and system for obtaining roaming information, including the gateway being connected with P GW, the roaming information that PGW will be received is transmitted to H PCRF.So, H PCRF extract VPLMN ID according to the roaming information for obtaining.By the present invention in fixed network mobile fusion framework, the transmission of roaming information is realized, so as to ensure that H PCRF determine suitable V PCRF.
Description
Technical field
The present invention relates to fixed network mobile fusion architecture technology, espespecially a kind of method and system for obtaining roaming information.
Background technology
Fig. 1 is the composition schematic diagram of existing EPS, as shown in figure 1, third generation partner program (3GPP, 3rd
Generation Partnership Project) evolution grouping system (EPS, Evolved Packet System) by
Universal Terrestrial Radio Access Network (E-UTRAN, Evolved Universal Terrestrial the Radio Access of evolution
Network), mobile management unit (MME, Mobility Management Entity), gateway (S-GW, Serving
Gateway), grouped data network gateway (P-GW, Packet Data Network Gateway) and home subscriber server
(HSS, Home Subscriber Server) is constituted.
As shown in figure 1, EPS supports the intercommunication with non-3 GPP system, wherein, the intercommunication with non-3 GPP system passes through S2a/b/
C interfaces realize that P-GW is used as the anchor point between 3GPP and non-3 GPP system.In the system architecture of EPS, non-3 GPP system accesses quilt
It is divided into trustless non-3 GPP access and trusted non-3 GPP access；Wherein, trustless non-3 GPP access need to be by evolution
Packet data gateway (ePDG, Evolved Packet Data Gateway) is connected with P-GW, and the interface between ePDG and P-GW is
S2b；Trusted non-3 GPP access directly can be connected by S2a interfaces with P-GW, S2a interfaces using proxy-mobile IP (PMIP,
Proxy Mobile IP) agreement carries out information exchange；In addition, S2c interfaces provide user equipment (UE, User
Equipment the related control of user plane) between P-GW and mobility support, the mobility management protocol that it is supported is branch
Hold mobile IP v 6 (DSMIPv6, Mobile IPv6 Support for Dual Stack the Hosts and of double stacks
Routers), it can be used for trustless non-3 gpp and trusted non-3 GPP access.
If EPS support policies charging control (PCC, Policy and Charging Control), then strategy and charging
Rule functional (PCRF, Policy and Charging Rules Function) carries out the formulation of strategy and charging regulation.Its
In, when the S5/S8 interfaces between S-GW and P-GW use GTP agreements, strategy and charge execution function are resided in P-GW
(PCEF, Policy and Charging Enforcement Function), letter is exchanged between PCRF and P-GW by Gx interfaces
Breath, is responsible for initiating the foundation of carrying, modification and discharges, it is ensured that service quality (QoS, the Quality of of business datum
Service), and charging control is carried out.When being accessed by trustless non-3 GPP network and supporting S2b interfaces, stayed in ePDG
Bearing binding and event reporting function (BBERF, Bearing Binding and Event Report Function) are stayed, with
Information is exchanged by S2b interfaces between PCRF.
When UE is roamed, ownership place PCRF (H-PCRF, Home PCRF) and visited place PCRF (V-PCRF, Visited
PCRF there is interface between) for S9 interfaces, enable roaming, the policy events intercommunication of home network, consult work.With S2a,
As a example by S2b access ways, as shown in Fig. 2 Fig. 2 is a kind of framves of the prior art UE by H (e) NB access mobile core networks
Structure.
When fixed network is used as non-3 GPP network access to mobile network, as fixed network mobile fusion framework.Melt in fixed network mobile
In closing framework, WLAN (WLAN, Wireless LAN) or base station from home (H (e) NB, Home NodeB or
Home eNodeB) EPS can be accessed by fixed network circuit, as shown in Figure 3, Figure 4.Wherein, fixed network connects as non-3 GPP network
Enter, broadband policy control function (BPCF, Broadband Policy Control Function) passes through S9* and PCRF between
Interface exchanges information, makes mobile network and fixed network policy framework intercommunication, realizes the unified management of mobile network resource and fixed network resource
Control.Under roaming scence, the interface between H-PCRF, V-PCRF and BPCF needs to set up corresponding session, moves ownership
The strategy of network can be delivered in the policy functional entity of roaming place fixed network, realize the unification of mobile network resource and fixed network resource
Management and control.
If fixed network can perceive mobile UE and access, or there is interface between visited place mobile net elements and V-PCRF
Words, then, BPCF sets up S9* sessions to V-PCRF requests, or visited place mobile net elements are built to V-PCRF gateway control sessions
Vertical request/IP-CAN session establishment request messages, V-PCRF finds H-PCRF according to ID, is built between triggering and H-PCRF
Vertical S9 sessions；
And can not perceive mobile UE in fixed network and access, and in the absence of interface between visited place mobile net elements and V-PCRF
In the case of, H (e) NB as shown in Figure 3 are accessed, and there is Gx interfaces in Fig. 3 between P-GW and H-PCRF, and V-PCRF and visited place
Network element do not exist interface；Or, WLAN S2b as shown in Figure 4 are accessed, and be there is Gx between P-GW and H-PCRF in Fig. 4 and are connect
Mouthful, and V-PCRF does not exist interface with the network element of visited place non-3 GPP network.In the case of shown in Fig. 3 or Fig. 4, now, P-
After GW receives corresponding signaling message, IP-CAN sessions can be set up to H-PCRF requests；H-PCRF receives the message trigger of P-GW
Afterwards, it is necessary to pass through V-PCRF sets up S9* sessions to BPCF requests, consult for the intercommunication of follow-up business Policies Resource.But, existing
Have in technology, the solution of suitable V-PCRF how is determined without offer H-PCRF, that is to say, that home network can not be obtained
Know the roaming information of visited network.
The content of the invention
In view of this, it is a primary object of the present invention to provide a kind of method and system for knowing roaming information, Neng Gou
In fixed network mobile fusion framework, the transmission of roaming information is realized, so that H-PCRF determines suitable V-PCRF.
To reach above-mentioned purpose, the technical proposal of the invention is realized in this way：
A kind of method for knowing roaming information, including：
Roaming information is passed to P-GW by the gateway being connected with grouped data network gateway P-GW；
The roaming information that PGW will be received is transmitted to ownership place "Policy and Charging Rules Function H-PCRF.
In base station from home H (e) NB subsystems, the gateway being connected with P-GW is gateway S-GW, transmission it is unrestrained
Trip information is S-GW network element address or customer position information.
The method also includes：The H-PCRF extracts VPLMN ID according to the roaming information for obtaining, specially：
If the roaming information that the H-PCRF is received is S-GW network element address, the H-PCRF is according to S-GW network element address
The VPLMN ID for being associated；
If the roaming information that the H-PCRF is received is customer position information, the H-PCRF is from customer position information
Obtain VPLMN ID.
The method also includes：The H-PCRF selects suitable V-PCRF according to the roaming information for obtaining.
The roaming information of the transmission is customer position information；Roaming information is passed to P-GW by the S-GW to be included：
Customer position information ULI marks are carried and are creating conversation request message/modification conversation request message by the S-GW
In be sent to P-GW；VPLMN ID are carried in ULI marks.
The roaming information that the PGW will be received is transmitted to H-PCRF to be included：
ULI marks in establishment conversation request message/modification conversation request message that the P-GW will be received, carry
H-PCRF is sent in IP-CAN session establishments request message/IP-CAN session modification request message.
When the H-PCRF receives IP-CAN session establishment request messages, the H-PCRF is carried according to the roaming information for obtaining
Taking VPLMN ID includes：If the H-PCRF judges that it supports FMC strategy intercommunications, from the IP-CAN sessions for receiving
Set up in the ULI carried in request message and obtain VPLMNID.
The method also includes：
The H-PCRF initiates S9 session requests triggering message to V-PCRF, is carried in S9 session requests triggering message and obtained
The VPLMN ID for obtaining, H-PCRF carry out Diameter message and are routed to suitable V-PCRF according to the VPLMN ID.
When the H-PCRF receives IP-CAN session modification request message, the H-PCRF is carried according to the roaming information for obtaining
Taking VPLMN ID includes：Obtained in the ULI marks that the H-PCRF is carried from the IP-CAN session modification request message for receiving
Take VPLMN ID.
The method also includes：The H-PCRF simultaneously inquires about whether the user has been present according to the VPLMN ID for obtaining
S9 sessions：
If there is no S9 sessions, then S9 session requests triggering message is initiated to V-PCRF, disappeared in the triggering of S9 session requests
Carrying VPLMN ID, H-PCRF carry out Diameter message and are routed to suitable V-PCRF according to VPLMN ID in breath；
If there is S9 sessions, then H-PCRF may change existing S9 sessions and S9* sessions, and after completing in agreement
Continuous switching flow.
The roaming information of the transmission is S-GW addresses；Roaming information is passed to P-GW by the S-GW to be included：
The Tunnel Identifier of the wholly-owned lattice of chain of command sender is carried and is creating conversation request message/modification meeting by the S-GW
P-GW is sent in words request message；S-GW addresses are carried in the Tunnel Identifier of the wholly-owned lattice of chain of command sender.
The roaming information that the PGW will be received is transmitted to H-PCRF to be included：
The chain of command that the P-GW is carried from the establishment conversation request message/modification conversation request message for receiving sends
S-GW addresses are obtained in the Tunnel Identifier of the wholly-owned lattice of person；
Be filled up in access gateway address cell for the S-GW addresses of acquisition by the P-GW, and access gateway address cell is taken
Band is sent to H-PCRF in IP-CAN session establishments request message/IP-CAN session modification request message.
The method also includes：The H-PCRF extracts VPLMN ID according to the roaming information for obtaining, specially：
The H-PCRF is obtained and received according to the S-GW addresses for locally prestoring and the mapping relations of VPLMN ID
The access gateway address cell in the corresponding VPLMN ID in S-GW addresses.
In WLAN WLAN, the gateway being connected with P-GW is the packet data gateway ePDG of evolution, institute
The roaming information for stating transmission is ePDG network element address or VPLMN id informations.
The roaming information of the transmission is VPLMN id informations；Roaming information is passed to P-GW by the ePDG to be included：
VPLMN id informations are carried and are sent to P-GW in conversation request message/PBU message is created by the ePDG.
The roaming information that the PGW will be received is transmitted to H-PCRF to be included：
The ePDG is carried from the VPLMN id informations for receiving in IP-CAN session establishments request message/IP-CAN
H-PCRF is sent in session modification request message.
The method also includes：
When the H-PCRF receives IP-CAN session establishment request messages, initiate the triggering of S9 session requests to V-PCRF and disappear
Breath, carries the VPLMN ID of acquisition in S9 session requests triggering message, and H-PCRF is carried out according to VPLMN ID
Diameter message is routed to suitable V-PCRF；Or,
When the H-PCRF receives IP-CAN session modification request message, initiate the triggering of S9 session requests to V-PCRF and disappear
Breath, VPLMN ID are carried in S9 session requests triggering message；Whether H-PCRF judge the user according to VPLMN ID
There is S9 sessions：
If there is no S9 sessions, then S9 session requests triggering message is initiated to V-PCRF, VPLMN is carried in the message
ID, H-PCRF carry out Diameter message and are routed to suitable V-PCRF according to VPLMN ID；
If there is S9 sessions, then H-PCRF may change existing S9 sessions and S9* sessions.
The roaming information of the transmission is ePDG network element address；Roaming information is passed to P-GW by the ePDG to be included：
The Tunnel Identifier of the wholly-owned lattice of chain of command sender is carried and is creating conversation request message/modification meeting by the ePDG
P-GW is sent in words request message；EPDG network element address is carried in the Tunnel Identifier of the wholly-owned lattice of chain of command sender.
The roaming information that the P-GW will be received is transmitted to H-PCRF to be included：
The chain of command that the P-GW is carried from the establishment conversation request message/modification conversation request message for receiving sends
EPDG network element address is obtained in the Tunnel Identifier of the wholly-owned lattice of person；
Be filled up to the ePDG network element address of acquisition in access gateway address cell by the P-GW, and access gateway address is believed
Unit carries and is sent to H-PCRF in IP-CAN session establishments request message/IP-CAN session modification request message.
The method also includes：The H-PCRF extracts VPLMN ID according to the roaming information for obtaining, specially：
The H-PCRF is according to the ePDG network element address of configuration and the mapping relations of VPLMN ID, the institute for obtaining and receiving
State the corresponding VPLMN ID of ePDG network element address in access gateway address cell.
The method also includes：
The H-PCRF initiates S9 session requests triggering message to V-PCRF, is carried in S9 session requests triggering message
The VPLMN ID, H-PCRF of acquisition carry out Diameter message and are routed to suitable V-PCRF according to VPLMN ID.
A kind of system for knowing roaming information, at least includes：First gateway, P-GW and H-PCRF, wherein,
First gateway, is connected with P-GW, for roaming information to be passed into P-GW；
P-GW, the roaming information for that will receive is transmitted to H-PCRF.
The roaming information that the H-PCRF is received is S-GW network element address, the H-PCRF, specifically for according to S-GW nets
The VPLMN ID that first address is associated；
The roaming information that the H-PCRF is received is customer position information, the H-PCRF, specifically for from customer location
VPLMN ID are obtained in information；
The roaming information that the H-PCRF is received is ePDG network element address, the H-PCRF, specifically for according to the ePDG
Network element address mapping obtains VPLMN ID；
The roaming information that the H-PCRF is received is VPLMN id informations, the H-PCRF, specifically for directly obtaining
VPLMN ID。
The H-PCRF, is additionally operable to, according to the roaming information for obtaining, select suitable V-PCRF.
In H (e) NB subsystems, first gateway is S-GW, and the roaming information of the transmission is S-GW network element address
Or customer position information；
In a wlan, first gateway is ePDG, and the roaming information of transmission is ePDG network element address or VPLMN ID
Information.
The H-PCRF, specifically for according to the VPLMN ID for obtaining, carrying out Diameter message and being routed to suitable V-
PCRF。
The technical scheme provided from the invention described above can be seen that transmits roaming information including the gateway being connected with P-GW
To P-GW, the roaming information that PGW will be received is transmitted to H-PCRF, and H-PCRF extracts VPLMN ID according to the roaming information for obtaining.
By the present invention in fixed network mobile fusion framework, the transmission of roaming information is realized, so as to ensure that H-PCRF determines conjunction
Suitable V-PCRF.
Brief description of the drawings
Fig. 1 is the composition schematic diagram of existing EPS；
Fig. 2 is a kind of frameworks of the prior art UE by non-3 GPP access mobile core network；
Fig. 3 is a kind of roaming architectures of the prior art UE by H (e) NB access mobile core networks；
Fig. 4 is prior art UE unrestrained by the local route of the non-3 GPP network S2b interface access mobile core network architectures
Trip scene；
Fig. 5 is the flow chart of the method that the present invention knows roaming information；
Fig. 6 is the schematic flow sheet of the first embodiment of user attachment flow of the present invention based on Fig. 3 frameworks；
Fig. 7 is the schematic flow sheet of first embodiment of the present invention based on the user's switching flow under Fig. 3 frameworks；
Fig. 8 is the schematic flow sheet of second embodiment of the present invention based on the user's attachment flow under Fig. 3 frameworks；
Fig. 9 is the schematic flow sheet of second embodiment of the present invention based on the user's switching flow under Fig. 3 frameworks；
Figure 10 is the schematic flow sheet of first embodiment of the present invention based on the user's attachment flow under Fig. 4 frameworks；
Figure 11 is the schematic flow sheet of first embodiment of the present invention based on the user's switching flow under Fig. 4 frameworks；
Figure 12 is the schematic flow sheet of second embodiment of the present invention based on the user's attachment flow under Fig. 4 frameworks；
Figure 13 is the schematic flow sheet of second embodiment of the present invention based on the user's switching flow under Fig. 4 frameworks；
Figure 14 is the system architecture schematic diagram that the present invention knows roaming information.
Specific embodiment
Fig. 5 is the flow chart of the method that the present invention knows roaming information, as shown in figure 5, comprising the following steps：
Step 500：Roaming information is passed to P-GW by the gateway being connected with P-GW.
In this step, in fixed network mobile fusion framework, the system for accessing EPS by fixed network circuit can be H (e) NB
System, or WLAN.Wherein,
In H (e) NB subsystems, the gateway being connected with P-GW is S-GW, and the roaming information of transmission is S-GW network element address
Or customer position information；
In a wlan, the gateway being connected with P-GW is ePDG, and the roaming information of transmission is ePDG network element address or visit
VPLMN network identifies (VPLMN ID) information.
Step 501：The roaming information that P-GW will be received is transmitted to H-PCRF.So, H-PCRF is according to the roaming letter for obtaining
Breath extracts VPLMN id informations.
In this step, if the roaming information that H-PCRF is received is S-GW network element address, H-PCRF is according to S-GW network elements ground
The VPLMN ID that location is associated；
If the roaming information that H-PCRF is received is customer position information, H-PCRF is obtained from customer position information
VPLMN ID；
If the roaming information that H-PCRF is received is ePDG network element address, ePDG network element ground of the H-PCRF according to configuration
Location and the mapping relations of VPLMN ID, mapping obtain VPLMN ID；
If the roaming information that H-PCRF is received is VPLMN id informations, H-PCRF directly obtains VPLMN ID.
The inventive method also includes：H-PCRF selects suitable V-PCRF according to the VPLMN ID for obtaining.Implement
Refer to subsequent embodiment.
Fig. 6 is the schematic flow sheet of the first embodiment of user attachment flow of the present invention based on Fig. 3 frameworks, the present embodiment
In, it is assumed that H-PCRF obtains VPLMN ID to select suitable V-PCRF according to customer position information.As shown in fig. 6, specific bag
Include：
Step 600：UE initiates Attach Request message according to agreement TS23.041 (Fig. 5 .3.2.1-1), when S-GW receives wound
When building session request, S-GW can be sent to P-GW and create conversation request message, and user is carried in the establishment conversation request message
Positional information (ULI, User Location Information) is identified, and can carry VPLMN ID in ULI marks.
Step 601：After P-GW receives establishment conversation request message, send the request of IP-CAN session establishments to H-PCRF and disappear
Breath, ULI is carried in IP-CAN session establishment request messages；After H-PCRF receives the message, IP-CAN meetings are replied to P-GW
Words set up response message.
Step 602：P-GW is replied to S-GW and is created conversational response message.
Step 603：H-PCRF receives IP-CAN session establishment request messages, if H-PCRF judges that it supports FMC strategies
If intercommunication, such as：Local IP is carried in IP-CAN session establishment request messages, is then obtained in the ULI for being carried from the message
VPLMN ID are taken, and S9 session requests triggering message is initiated to V-PCRF, carry what is obtained in S9 session requests triggering message
VPLMN ID, H-PCRF carry out Diameter message and are routed to suitable V-PCRF according to the VPLMN ID.
In this step, according to existing protocol, if H-PCRF judges that it does not support FMC strategy intercommunications, such as：IP-
Local IP is not carried in CAN session establishment request messages, then jumps out flow of the present invention, continued executing with according to existing protocol.
By this step, H-PCRF have selected suitable V-PCRF.
Step 604：V-PCRF returns to S9 session triggered response messages to H-PCRF.It should be noted that this step also may be used
To omit.
Step 605：S9 session establishment flows are completed between V-PCRF and H-PCRF.
Step 606：After V-PCRF receives the S9 session requests triggering message of H-PCRF, according to the sheet carried in the message
Ground IP finds BPCF, and triggers the foundation of S9* sessions.
After above-mentioned strategy session foundation is completed, continue according to agreement TS23.041 (Fig. 5 .3.2.1-1) between UE and S-GW
Complete attachment flow follow-up process.
Fig. 7 is the schematic flow sheet of first embodiment of the present invention based on the user's switching flow under Fig. 3 frameworks, this implementation
Example is that user switches or be switched to from eNodeB the flow of H (e) NB between H (e) NB, it is assumed that H- based under Fig. 3 frameworks
PCRF obtains VPLMN ID to select suitable V-PCRF according to customer position information.In the present embodiment, MME support positions letter
Breath change is reported, it is desirable to which P-GW transmission positional information changes are reported and are indicated to MME.It should be noted that in attachment flow, position
It is essential information to put information reporting, and S-GW is reported by MME, then passes to P-GW by S-GW, therefore, do not have in Fig. 6 embodiments
There is special instruction；When follow-up location changes, if it is optional to report.If it is required that must report, needed attached in user
When, in the establishment session request signaling message that MME sends, MME needs to carry and represents that assisting positional information changes what is reported
Information, and P-GW is transmitted to by S-GW, and P-GW is in conversational response message is created, and carries indicating positions information and changes what is reported
Information, MME is transmitted to by S-GW.
As shown in fig. 7, specifically including following steps：
Step 700：UE initiates switching flow according to agreement TS23.041 (Fig. 5 .5.1.1.3-1,5.51.2.2-1), works as S-
When GW receives modification session request, S-GW sends modification conversation request message to P-GW, is carried in conversation request message is changed
There is ULI to identify, and VPLMN ID are carried in ULI marks.
Step 701：After P-GW receives modification conversation request message, send IP-CAN session modification requests to H-PCRF and disappear
Breath, ULI is carried in IP-CAN session modification request message；After H-PCRF receives the IP-CAN session modification request message, to
H-PCRF replys IP-CAN session modification response messages.
Step 702：P-GW replys modification conversational response message to S-GW.
Step 703：H-PCRF receives IP-CAN session modification request message, is obtained in the ULI marks for carrying therefrom
VPLMN ID, and inquire about whether the user has had S9 sessions according to VPLMN ID：
If there is no S9 sessions, then S9 session requests triggering message is initiated to V-PCRF, disappeared in the triggering of S9 session requests
Carrying VPLMN ID, H-PCRF carry out Diameter message and are routed to suitable V-PCRF according to VPLMN ID in breath；
If there is S9 sessions, then H-PCRF may change existing S9 sessions and S9* sessions, and complete to switch in agreement
Flow flow after step, i.e., do not perform 704~step 706 of subsequent step.
Step 704：V-PCRF returns to S9 session triggered response messages to H-PCRF.It should be noted that this step also may be used
To omit.
Step 705：S9 session establishment flows are completed between V-PCRF and H-PCRF.
Step 706：After V-PCRF receives the S9 session requests triggering message of H-PCRF, triggered according to the S9 session requests
The local IP carried in message finds BPCF, and triggers the foundation of S9* sessions.
After the foundation for completing above-mentioned strategy session, according to agreement TS23.041 (Fig. 5 .5.1.1.3-1,5.51.2.2-1)
Continue to complete the flow of switching flow.
Fig. 8 is the schematic flow sheet of second embodiment of the present invention based on the user's attachment flow under Fig. 3 frameworks, this implementation
In example, it is assumed that H-PCRF obtains VPLMNID to select suitable V- according to the Tunnel Identifier of the wholly-owned lattice of chain of command sender
PCRF.As shown in figure 8, comprising the following steps：
Step 800：UE initiates Attach Request message according to agreement TS23.401 (Fig. 5 .3.2.1-1), when S-GW receives wound
When building session request, S-GW is sent to P-GW and creates conversation request message, and chain of command is carried in the establishment conversation request message
The Tunnel Identifier (Sender F-TEID for Control Plane) of the wholly-owned lattice of sender, chain of command sender's
S-GW addresses are carried in the Tunnel Identifier of wholly-owned lattice.
Step 801：After P-GW receives establishment conversation request message, control is extracted from the establishment conversation request message for receiving
The Tunnel Identifier of the wholly-owned lattice of face sender processed, and S-GW addresses are obtained from the mark, and the S-GW addresses of acquisition are filled in
To in access gateway address (AN-GW-Address) cell, IP-CAN session establishment request messages are sent to H-PCRF again afterwards,
AN-GW-Address cells are carried in the IP-CAN session establishment request messages；H-PCRF receives IP-CAN session establishments
After request message, IP-CAN session establishment response messages are replied to P-GW.
Step 802：P-GW is replied to S-GW and is created conversational response message.
Step 803：H-PCRF receives IP-CAN session establishment request messages, and S- is obtained from AN-GW-Address cells
GW addresses, according to the S-GW addresses being locally previously stored with and the mapping relations of VPLMN ID, obtain corresponding VPLMN ID；H-
PCRF initiates S9 session requests triggering message to V-PCRF, and the VPLMN of acquisition is carried in S9 session requests triggering message
ID, H-PCRF carry out Diameter message and are routed to suitable V-PCRF according to VPLMNID.
Step 804：V-PCRF replys S9 session triggered response messages to H-PCRF.It should be noted that this step also may be used
To omit.
Step 805：S9 session establishment flows are completed between V-PCRF and H-PCRF.
Step 806：After V-PCRF receives the S9 session requests triggering message of H-PCRF, according to the sheet carried in the message
Ground IP finds BPCF, and triggers the foundation of S9* sessions.
After the foundation for completing above-mentioned strategy session, attachment is continued to complete according to agreement TS23.401 (Fig. 5 .3.2.1-1)
The follow-up flow of flow.
Fig. 9 is the schematic flow sheet of second embodiment of the present invention based on the user's switching flow under Fig. 3 frameworks, this implementation
In example, it is assumed that H-PCRF obtains VPLMNID to select suitable V- according to the Tunnel Identifier of the wholly-owned lattice of chain of command sender
PCRF.As shown in figure 9, specifically including following steps：
Step 900：UE initiates switching flow according to agreement TS23.401 (Fig. 5 .5.1.1.3-1,5.5.1.2.2-1), when
When S-GW receives modification session request, S-GW will send modification conversation request message to P-GW, in the modification conversation request message
In carry chain of command sender wholly-owned lattice Tunnel Identifier (Sender F-TEID for Control Plane), and
S-GW addresses are carried in the Tunnel Identifier of the wholly-owned lattice of chain of command sender；
Step 901：After P-GW receives modification conversation request message, the tunnel of the wholly-owned lattice of chain of command sender is therefrom extracted
Mark, and S-GW addresses are taken out from the mark, it is filled up in access gateway address (AN-GW-Address) cell, Ran Houzai
IP-CAN session modification request message is sent to H-PCRF, AN-GW- is carried in the IP-CAN session modification request message
Address cells；After H-PCRF receives the IP-CAN session modification request message, reply IP-CAN session establishments to P-GW and respond
Message.
Step 902：P-GW replys modification conversational response message to S-GW.
Step 903：H-PCRF receives IP-CAN session modification request message, the AN-GW-Address letters for carrying therefrom
S-GW2 addresses are obtained in unit, further according to the S-GW addresses for locally prestoring and the mapping relations of VPLMN ID, is obtained corresponding
VPLMN ID, and inquire about whether the user has had S9 sessions according to VPLMN ID：
If there is no S9 sessions, then S9 session requests triggering message is initiated to V-PCRF, VPLMN is carried within the message
ID, H-PCRF carry out Diameter message and are routed to suitable V-PCRF according to VPLMN ID；
If there is S9 sessions, then H-PCRF may change existing S9 sessions and S9* sessions, and complete agreement
The switching flow of TS23.401 (Fig. 5 .5.1.1.3-1,5.5.1.2.2-1) flow after step, omits step of the invention
Rapid 904~step 906.
Step 904：V-PCRF returns to S9 session triggered response messages to H-PCRF.It should be noted that this step also may be used
To omit.
Step 905：S9 session establishment flows are completed between V-PCRF and H-PCRF.
Step 906：After V-PCRF receives the S9 session requests triggering message of H-PCRF, according to the sheet carried in the message
Ground IP finds BPCF, and triggers the foundation of S9* sessions.
Complete Fig. 9 shown in strategy session foundation after, according to agreement TS23.401 (Fig. 5 .5.1.1.3-1,
5.5.1.2.2-1 the follow-up process of switching flow) is continued to complete.
Figure 10 is the schematic flow sheet of first embodiment of the present invention based on the user's attachment flow under Fig. 4 frameworks, this reality
Apply example to be based under Fig. 4 frameworks, the scheme of user's attachment flow is identical with the embodiment shown in Fig. 6, and H-PCRF is according to VPLMN ID
Select suitable V-PCRF.As shown in Figure 10, specifically include：
Step 1000：Ipsec tunnel is completed between UE and ePDG to set up；If using PRS tunnels between ePDG and P-GW
Agreement (GTP, GPRS Tunneling Protocol) agreement, ePDG can send to P-GW and create conversation request message；If
Using if proxy-mobile IP (PMIP, Proxy Mobile IP) agreement between ePDG and P-GW, ePDG can send generation to P-GW
Reason binding updates (PBU, Proxy Binding Update) message.Wherein, if carrying local IP in the message that receives of ePDG
(local IP) information, but ePDG does not support Gxb* interfaces, then, ePDG is in conversation request message or PBU message is created
Carry VPLMN ID.
Step 1001：After P-GW receives establishment session request/PBU message, sending IP-CAN session establishments to H-PCRF please
Message is sought, VPLMN ID are carried in the IP-CAN session establishment request messages；H-PCRF receives the request of IP-CAN session establishments
After message, IP-CAN session establishment response messages are replied to P-GW.
Step 1002：P-GW is replied to ePDG and is created conversational response/PBA message.
Step 1003：H-PCRF receives IP-CAN session establishment request messages, initiates S9 session requests to V-PCRF and triggers
Message, carrying VPLMN ID, H-PCRF carry out Diameter message road according to VPLMN ID in S9 session requests triggering message
By to suitable V-PCRF.
Step 1004：V-PCRF replys S9 session triggered response messages to H-PCRF.It should be noted that this step also may be used
To omit.
Step 1005：S9 session establishment flows are completed between V-PCRF and H-PCRF.
Step 1006：After V-PCRF receives the S9 session requests triggering message of H-PCRF, according to what is carried in the message
Local IP finds BPCF, and triggers the foundation of S9* sessions.
Figure 11 is the schematic flow sheet of first embodiment of the present invention based on the user's switching flow under Fig. 4 frameworks, is such as schemed
Shown in 11, following steps are specifically included：
Step 1100：UE initiates switching flow, ipsec tunnel is completed between UE and ePDG and is set up.What if ePDG was received
Local IP are carried in message, but ePDG does not support Gxb* interfaces, then and ePDG is in conversation request message or PBU message is created
Carry VPLMN ID.
Step 1101~step 1102：After P-GW receives establishment session request/PBU message, IP-CAN is sent to H-PCRF
Session modification request message, VPLMNID is carried in IP-CAN session modification request message；After H-PCRF receives the message, to
P-GW replys IP-CAN session modification response messages.
Step 1103：H-PCRF receives IP-CAN session modification request message, initiates S9 session requests to V-PCRF and triggers
Message, VPLMN ID are carried in S9 session requests triggering message；Whether H-PCRF judge the user according to VPLMN ID
Through there is S9 sessions：
If there is no S9 sessions, then S9 session requests triggering message is initiated to V-PCRF, VPLMN is carried in the message
ID, H-PCRF carry out Diameter message and are routed to suitable V-PCRF according to VPLMN ID；
If there is S9 sessions, then H-PCRF may change existing S9 sessions and S9* sessions, and complete to switch in agreement
Flow flow after step, i.e., do not perform 1104~step 1106 of subsequent step.
Step 1104：V-PCRF replys S9 session triggered response messages to H-PCRF.It should be noted that this step also may be used
To omit.
Step 1105：S9 session establishment flows are completed between V-PCRF and H-PCRF.
Step 1106：After V-PCRF receives the S9 session requests triggering message of H-PCRF, according to what is carried in the message
Local IP finds BPCF, and triggers the foundation of S9* sessions.
Figure 12 is the schematic flow sheet of second embodiment of the present invention based on the user's attachment flow under Fig. 4 frameworks, this reality
Apply in example, H-PCRF selects suitable V-PCRF according to ePDG address acquisition VPLMN ID.As shown in figure 12, specifically include
Following steps：
Step 1200：Ipsec tunnel is completed between UE and ePDG to set up.If using GTP agreements between ePDG and P-GW,
Then ePDG can send to P-GW and create conversation request message；If using PMIP agreements between ePDG and P-GW, ePDG can be to
P-GW sends PBU message.Wherein, the Tunnel Identifier that conversation request message carries the wholly-owned lattice of chain of command sender is created
(Sender F-TEID for Control Plane), can carry ePDG addresses in the mark；Can be included in PBU message headers
EPDG addresses.
Step 1201：After P-GW receives establishment conversation request message, Sender F-TEID for are obtained from the message
EPDG addresses are taken out in Control Plane, and the Tunnel Identifier of wholly-owned lattice from chain of command sender, access network is filled up to
In address (AN-GW-Address) cell of pass；Or, if P-GW receives PBU message, ePDG ground is obtained from PBU message headers
Location, is filled up to access gateway address (AN-GW-Address) cell, and sends IP-CAN session establishments to H-PCRF and ask to disappear
Breath, carries AN-GW-Address cells in the message；
After H-PCRF receives establishment conversation request message or PBU message, reply the response of IP-CAN session establishments to P-GW and disappear
Breath.
Step 1202：P-GW is replied to ePDG and is created conversational response/agent binding confirmation (PBA, Proxy Binding
Acknowledgement) message.
Step 1203：H-PCRF receives IP-CAN session establishment request messages, according to local ePDG addresses and VPLMN
The mapping relations of ID, obtain VPLMN ID, and initiate S9 session requests triggering message to V-PCRF, in S9 session requests triggering
Carrying VPLMN ID, H-PCRF carry out Diameter message and are routed to suitable V-PCRF according to VPLMN ID in message.
Step 1204：V-PCRF replys S9 session triggered response messages to H-PCRF.It should be noted that this step also may be used
To omit.
Step 1205：S9 session establishment flows are completed between V-PCRF and H-PCRF.
Step 1206~step 1207：After V-PCRF receives the S9 session requests triggering message of H-PCRF, disappeared according to this
The local IP carried in breath finds BPCF, and triggers the foundation of S9* sessions.
Figure 13 is the schematic flow sheet of second embodiment of the present invention based on the user's switching flow under Fig. 4 frameworks, this reality
Apply in example, H-PCRF selects suitable V-PCRF according to ePDG address acquisition VPLMN ID.As shown in figure 13, specifically include
Following steps：
Step 1300：UE initiates switching flow, ipsec tunnel is completed between UE and ePDG and is set up.If ePDG and P-GW
Between use GTP agreements, then ePDG can to P-GW send create conversation request message；If using PMIP between ePDG and P-GW
Agreement, then ePDG can be to P-GW transmission PBU message.Wherein, the wholly-owned lattice that conversation request message carries chain of command sender are created
Tunnel Identifier (Sender F-TEID for Control Plane), ePDG addresses can be carried in the mark；PBU message headers
Middle meeting includes ePDG addresses.
Step 1301：After P-GW receives establishment conversation request message, Sender F-TEID for are obtained from the message
EPDG addresses are taken out in Control Plane, and the Tunnel Identifier of wholly-owned lattice from chain of command sender, access network is filled up to
In address (AN-GW-Address) cell of pass；Or, if P-GW receives PBU message, ePDG ground is obtained from PBU message headers
Location, is filled up to access gateway address (AN-GW-Address) cell, and sends IP-CAN session establishments to H-PCRF and ask to disappear
Breath, carries AN-GW-Address cells in the message；
After H-PCRF receives establishment conversation request message or PBU message, reply the response of IP-CAN session establishments to P-GW and disappear
Breath.
Step 1302：P-GW is replied to ePDG and is created conversational response/PBA message.
Step 1303~1304：H-PCRF receives IP-CAN session establishment request messages, according to local ePDG addresses and
The mapping relations of VPLMN ID, obtain VPLMN ID, and initiate S9 session requests triggering message to V-PCRF, please in the S9 sessions
Carrying VPLMN ID, H-PCRF judge whether the user has had S9 sessions according to VPLMN ID in seeking triggering message：
If there is no S9 sessions, then S9 session requests triggering message is initiated to V-PCRF, VPLMN is carried in the message
ID, H-PCRF carry out Diameter message and are routed to suitable V-PCRF according to VPLMN ID；
If there is S9 sessions, then H-PCRF may change existing S9 sessions and S9* sessions, and complete to switch in agreement
Flow flow after step, i.e., do not perform 1305~step 1307 of subsequent step.
Step 1305：V-PCRF replys S9 session triggered response messages to H-PCRF.It should be noted that this step also may be used
To omit.
Step 1306~step 1307：After V-PCRF receives the S9 session requests triggering message of H-PCRF, disappeared according to this
The local IP carried in breath finds BPCF, and triggers the foundation of S9* sessions.
For the inventive method, a kind of system for knowing roaming information is also provided, at least included：First gateway, P-GW, with
And H-PCRF, wherein,
First gateway, is connected with P-GW, for roaming information to be passed into P-GW；Wherein, in H (e) NB subsystems, the
One gateway is S-GW, and the roaming information of transmission is S-GW network element address or customer position information；In a wlan, the first gateway is
EPDG, the roaming information of transmission is ePDG network element address or VPLMN id informations.
P-GW, the roaming information for that will receive is transmitted to H-PCRF；
H-PCRF, is specifically used for,
If the roaming information that H-PCRF is received is S-GW network element address, H-PCRF, specifically for according to S-GW network elements ground
The VPLMN ID that location is associated；
If the roaming information that H-PCRF is received is customer position information, H-PCRF, specifically for from customer position information
VPLMN ID can be obtained；
If the roaming information that H-PCRF is received is ePDG network element address, H-PCRF, specifically for according to the ePDG network elements
Address of cache obtains VPLMN ID；
If the roaming information that H-PCRF is received is VPLMN id informations, H-PCRF, specifically for directly obtaining VPLMN
ID。
H-PCRF of the present invention, is additionally operable to, according to the roaming information for obtaining, select suitable V-PCRF.Specifically for basis
The VPLMN ID of acquisition, carry out Diameter message and are routed to suitable V-PCRF.
The above, only presently preferred embodiments of the present invention is not intended to limit the scope of the present invention, it is all
Any modification, equivalent and improvement for being made within the spirit and principles in the present invention etc., should be included in protection of the invention
Within the scope of.
Claims (21)
1. a kind of method for knowing roaming information, it is characterised in that including：
Roaming information is passed to P-GW by the gateway being connected with grouped data network gateway P-GW；
The roaming information that P-GW will be received is transmitted to ownership place "Policy and Charging Rules Function H-PCRF；
Wherein, in Home node base station HNB subsystem or HeNB subsystems, the gateway being connected with P-GW is gateway S-
GW, the roaming information of transmission is S-GW network element address or customer position information；In WLAN WLAN, described and P-
GW connected gateway is the packet data gateway ePDG of evolution, the roaming information of the transmission for ePDG network element address or
VPLMN id informations；
The roaming information of the transmission is customer position information；Roaming information is passed to P-GW by the S-GW to be included：
Customer position information ULI marks are carried and sent out in conversation request message/modification conversation request message is created by the S-GW
Give P-GW；VPLMN ID are carried in ULI marks；
The roaming information of the transmission is S-GW addresses；Roaming information is passed to P-GW by the S-GW to be included：
The S-GW carries the Tunnel Identifier of the wholly-owned lattice of chain of command sender please in establishment conversation request message modification session
Ask and be sent to P-GW in message；S-GW addresses are carried in the Tunnel Identifier of the wholly-owned lattice of chain of command sender；
The roaming information of the transmission is ePDG network element address；Roaming information is passed to P-GW by the ePDG to be included：
The ePDG carries the Tunnel Identifier of the wholly-owned lattice of chain of command sender please in establishment conversation request message/modification session
Ask and be sent to P-GW in message；EPDG network element address is carried in the Tunnel Identifier of the wholly-owned lattice of chain of command sender.
2. method according to claim 1, it is characterised in that the method also includes：The H-PCRF is unrestrained according to what is obtained
Trip information extraction VPLMN ID, specially：
If the roaming information that the H-PCRF is received is S-GW network element address, the H-PCRF is obtained according to S-GW network element address
The VPLMN ID of association；
If the roaming information that the H-PCRF is received is customer position information, the H-PCRF is obtained from customer position information
VPLMN ID。
3. method according to claim 1 and 2, it is characterised in that the method also includes：The H-PCRF is according to acquisition
Roaming information, selects suitable V-PCRF.
4. method according to claim 1, it is characterised in that the roaming information that the P-GW will be received is transmitted to H-PCRF
Including：
ULI marks in establishment conversation request message/modification conversation request message that the P-GW will be received, carry in IP-
H-PCRF is sent in CAN session establishments request message/IP-CAN session modification request message.
5. method according to claim 4, it is characterised in that the H-PCRF receives IP-CAN session establishment request messages
When, the H-PCRF extracts VPLMN ID according to the roaming information for obtaining to be included：
If the H-PCRF judges that it supports FMC strategy intercommunications, disappear from the IP-CAN session establishments request for receiving
VPLMN ID are obtained in the ULI carried in breath.
6. method according to claim 5, it is characterised in that the method also includes：
The H-PCRF initiates S9 session requests triggering message to V-PCRF, carries what is obtained in S9 session requests triggering message
The VPLMN ID, H-PCRF carry out Diameter message and are routed to suitable V-PCRF according to the VPLMN ID.
7. method according to claim 4, it is characterised in that the H-PCRF receives IP-CAN session modification request message
When, the H-PCRF extracts VPLMN ID according to the roaming information for obtaining to be included：
VPLMN ID are obtained in the ULI marks that the H-PCRF is carried from the IP-CAN session modification request message for receiving.
8. method according to claim 7, it is characterised in that the method also includes：The H-PCRF and according to obtain
The VPLMN ID inquire about whether the user has had S9 sessions：
If there is no S9 sessions, then S9 session requests triggering message is initiated to V-PCRF, in S9 session requests triggering message
Carrying VPLMN ID, H-PCRF carry out Diameter message and are routed to suitable V-PCRF according to VPLMN ID；
If there is S9 sessions, then H-PCRF may change existing S9 sessions and S9* sessions, and follow-up cutting of completing in agreement
Change of current journey.
9. method according to claim 8, it is characterised in that the roaming information that the P-GW will be received is transmitted to H-PCRF
Including：
The chain of command sender's that the P-GW is carried from the establishment conversation request message/modification conversation request message for receiving
S-GW addresses are obtained in the Tunnel Identifier of wholly-owned lattice；
Be filled up in access gateway address cell for the S-GW addresses of acquisition by the P-GW, and access gateway address cell is carried
H-PCRF is sent in IP-CAN session establishments request message/IP-CAN session modification request message.
10. method according to claim 9, it is characterised in that the method also includes：The H-PCRF is unrestrained according to what is obtained
Trip information extraction VPLMN ID, specially：
The H-PCRF is according to the S-GW addresses for locally prestoring and the mapping relations of VPLMN ID, the institute for obtaining and receiving
State the corresponding VPLMN ID in S-GW addresses in access gateway address cell.
11. methods according to claim 1, it is characterised in that the roaming information of the transmission is VPLMN id informations；Institute
Stating ePDG roaming information is passed into P-GW includes：
VPLMN id informations are carried and are sent to P-GW in conversation request message/PBU message is created by the ePDG.
12. methods according to claim 1, it is characterised in that the roaming information that the P-GW will be received is transmitted to H-
PCRF includes：
The ePDG is carried from the VPLMN id informations for receiving in IP-CAN session establishments request message/IP-CAN sessions
H-PCRF is sent in modification request message.
13. methods according to claim 12, it is characterised in that the method also includes：
When the H-PCRF receives IP-CAN session establishment request messages, S9 session requests triggering message is initiated to V-PCRF,
The VPLMN ID of acquisition are carried in S9 session requests triggering message, H-PCRF carries out Diameter message according to VPLMN ID
It is routed to suitable V-PCRF；Or,
When the H-PCRF receives IP-CAN session modification request message, S9 session requests triggering message is initiated to V-PCRF,
VPLMN ID are carried in S9 session requests triggering message；H-PCRF judges whether the user has been present according to VPLMN ID
S9 sessions：
If there is no S9 sessions, then S9 session requests triggering message is initiated to V-PCRF, VPLMN ID, H- are carried in the message
PCRF carries out Diameter message and is routed to suitable V-PCRF according to VPLMN ID；
If there is S9 sessions, then H-PCRF may change existing S9 sessions and S9* sessions.
14. methods according to claim 1, it is characterised in that the roaming information that the P-GW will be received is transmitted to H-
PCRF includes：
The chain of command sender's that the P-GW is carried from the establishment conversation request message/modification conversation request message for receiving
EPDG network element address is obtained in the Tunnel Identifier of wholly-owned lattice；
Be filled up to the ePDG network element address of acquisition in access gateway address cell by the P-GW, and access gateway address cell is taken
Band is sent to H-PCRF in IP-CAN session establishments request message/IP-CAN session modification request message.
15. methods according to claim 1, it is characterised in that the method also includes：The H-PCRF is unrestrained according to what is obtained
Trip information extraction VPLMN ID, specially：
According to the ePDG network element address of configuration and the mapping relations of VPLMN ID, what is obtained and receive described connects the H-PCRF
The corresponding VPLMN ID of ePDG network element address in the cell of function Access Gateway address.
16. method according to claim 10 or 15, it is characterised in that the method also includes：
The H-PCRF initiates S9 session requests triggering message to V-PCRF, is carried in S9 session requests triggering message and obtained
VPLMN ID, H-PCRF Diameter message carried out according to VPLMN ID be routed to suitable V-PCRF.
17. a kind of systems for knowing roaming information, it is characterised in that at least include：First gateway, P-GW and H-PCRF, its
In,
First gateway, is connected with P-GW, for roaming information to be passed into P-GW；
P-GW, the roaming information for that will receive is transmitted to H-PCRF；
Wherein, in Home node base station HNB subsystem or HeNB subsystems, first gateway is gateway S-GW, transmission
Roaming information is S-GW network element address or customer position information；In WLAN WLAN, first gateway is to drill
The packet data gateway ePDG for entering, the roaming information of the transmission is ePDG network element address or VPLMN id informations；
The roaming information of the transmission is customer position information；First gateway, for customer position information ULI marks to be taken
Band is sent to P-GW in conversation request message/modification conversation request message is created；VPLMN ID are carried in ULI marks；
The roaming information of the transmission is S-GW addresses；First gateway, for by the tunnel of the wholly-owned lattice of chain of command sender
Road mark is carried and is sent to P-GW in conversation request message modification conversation request message is created；In the wholly-owned of chain of command sender
S-GW addresses are carried in the Tunnel Identifier of lattice；
The roaming information of the transmission is ePDG network element address；First gateway, for by the wholly-owned lattice of chain of command sender
Tunnel Identifier carry create conversation request message/modification conversation request message in be sent to P-GW；In chain of command sender
Wholly-owned lattice Tunnel Identifier in carry ePDG network element address.
18. systems according to claim 17, it is characterised in that the roaming information of the transmission is VPLMN id informations；
First gateway, P- is sent to for VPLMN id informations to be carried in conversation request message/PBU message is created
GW。
19. systems according to claim 17, it is characterised in that
The roaming information that the H-PCRF is received is S-GW network element address, the H-PCRF, specifically for according to S-GW network elements ground
The VPLMN ID that location is associated；
The roaming information that the H-PCRF is received is customer position information, the H-PCRF, specifically for from customer position information
Middle acquisition VPLMN ID；
The roaming information that the H-PCRF is received is ePDG network element address, the H-PCRF, specifically for according to the ePDG network elements
Address of cache obtains VPLMN ID；
The roaming information that the H-PCRF is received is VPLMN id informations, the H-PCRF, specifically for directly obtaining VPLMN
ID。
20. system according to claim 17 or 18, it is characterised in that the H-PCRF, is additionally operable to unrestrained according to what is obtained
Trip information, selects suitable V-PCRF.
21. systems according to claim 20, it is characterised in that the H-PCRF, specifically for according to the VPLMN for obtaining
ID, carries out Diameter message and is routed to suitable V-PCRF.
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| CN102984756B (en) * | 2012-11-09 | 2016-03-02 | 大唐移动通信设备有限公司 | A kind of downlink signaling message flow processing method and system |
| CN103442462B (en) * | 2013-08-26 | 2017-04-12 | 大唐移动通信设备有限公司 | PGW flow processing achieving method and device |
| CN104782151B (en) | 2013-10-11 | 2018-10-19 | 华为技术有限公司 | Information transferring method and device |
| WO2015096163A1 (en) * | 2013-12-27 | 2015-07-02 | 华为技术有限公司 | Position information reporting method, device and system |
| CN110267221B (en) * | 2019-05-30 | 2022-11-11 | 深圳市秒加能源科技有限公司 | Wireless electronic charging system based on Internet of things |
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| CN101568095A (en) * | 2008-04-26 | 2009-10-28 | 华为技术有限公司 | Method, equipment and system for linking non-3GPP access gateway and policy and charging rule function (PCRF) |
| CN101741822A (en) * | 2008-11-11 | 2010-06-16 | 大唐移动通信设备有限公司 | Method, system and device for establishing session |
| CN102340766A (en) * | 2010-07-23 | 2012-02-01 | 中兴通讯股份有限公司 | Method for home network to acquire network element information in visit network and system thereof |
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| CN101568095A (en) * | 2008-04-26 | 2009-10-28 | 华为技术有限公司 | Method, equipment and system for linking non-3GPP access gateway and policy and charging rule function (PCRF) |
| CN101741822A (en) * | 2008-11-11 | 2010-06-16 | 大唐移动通信设备有限公司 | Method, system and device for establishing session |
| CN102340766A (en) * | 2010-07-23 | 2012-02-01 | 中兴通讯股份有限公司 | Method for home network to acquire network element information in visit network and system thereof |
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