CN103369502B - The processing method and network element of a kind of policy control session - Google Patents
The processing method and network element of a kind of policy control session Download PDFInfo
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Abstract
The invention discloses the processing methods and network element of a kind of policy control session, terminal is accessed by trusted WLAN (TWAN), strategy and charge execution function (PCEF) are established with "Policy and Charging Rules Function (PCRF) in the first Gx conversation procedures, are notified the PCRF delays correlating sessions instruction or are represented the instruction that terminal is accessed by trusted WLAN；The PCRF receive gateway control session establish message and receive the 2nd Gx session establishments instruction after, the gateway control session and the 2nd Gx sessions are associated.The processing method of policy control session in this programme can solve strategy execution Problem-Error caused by improper session association in the prior art.
Description
Technical field
The present invention relates to the communications field more particularly to the processing methods and network element of a kind of policy control session.
Background technology
Point of the evolution of third generation partner program 3GPP (3rd Generation Partnership Project)
System system EPS (Evolved Packet System) by evolution Universal Terrestrial Radio Access Network (Evolved Universal
Terrestrial Radio Access Network, E-UTRAN), mobile management unit MME (Mobility Management
Entity), gateway S-GW (Serving Gateway), grouped data network gateway P-GW (Packet Data
Network Gateway), home subscriber server HSS (Home Subscriber Server), 3GPP authentication and authorization chargings clothes
Be engaged in device (3GPP AAA Server), "Policy and Charging Rules Function PCRF (Policy and Charging Rules
Function) and other support nodes form.
Fig. 1 is the system architecture schematic diagram of the EPS in correlation technique；Wherein, MME is responsible for mobile management, Non-Access Stratum
The related work of the control planes such as the processing of signaling and the management of user's mobile management context；S-GW is connected with E-UTRAN
Accessing gateway equipment for forwarding data between E-UTRAN and P-GW, and is responsible for caching the pending datas such as paging；
P-GW is then the borde gateway of EPS and packet data network PDN (Packet Data Network) network, is responsible for the access of PDN
And the functions such as data are forwarded between EPS and PDN.
EPS supports the intercommunication with non-3 GPP network, and passes through the realization of S2a/b/c interfaces and the intercommunication of non-3 GPP network.It is non-
3GPP networks include trusted non-3 GPP network and trustless non-3 GPP network.The procotol IP of trusted non-3 GPP network
(Intemet Protocol) access can be directly connected by S2a interfaces with P-GW；The IP accesses of trustless non-3 GPP network
The packet data gateway ePDG (Evolved Packet Data Gateway) by evolution is needed to be connected with P-GW, ePDG with
It is connected between P-GW by S2b interfaces.
If EPS system support policy charging control PCC (Policy and Charging Control), by PCRF into
The formulation of row strategy and charging regulation；PCRF is connected by receiving interface Rx with the IP operation network of operator, obtains business letter
Breath；In addition, PCRF is connected by Gx/Gxa/Gxc interfaces with the gateway device in network, it is responsible for initiating the foundation of IP carryings, protects
The service quality QoS (Quality of Service) of business datum is demonstrate,proved, and carries out charging control.Wherein, strategy and charging are held
Row function PCEF (Policy and Charging Enforcement Function) is located in P-GW, leads between PCRF and P-GW
It crosses Gx interfaces and exchanges information.When the interface between P-GW and S-GW is based on proxy-mobile IP PMIP (Proxy Mobile IP),
There are bearing bindings and event reporting function BBERF (Bearer Binding and Event Report in S-GW
Function information), and between S-GW and PCRF is exchanged by Gxc interfaces.When being accessed by trusted non-3 GPP network,
BBERF is also resident in the trusted non-3 GPP access network Central Shanxi Plain, passes through Gxa between the access gateway and PCRF of trusted non-3 GPP network
Interface exchanges information.When user equipment (UE) (User Equipment) roams, the interface of ownership place PCRF and visited place PCRF are
S9 interfaces, meanwhile, the application function AF (Application Function) that business is provided for UE is located in business network, passes through
Rx interface sends to generate the business information of PCC strategies to PCRF.
Fig. 2 accesses EPS by E-UTRAN for UE and establishes the initial attachment flow figure of PDN connections (i.e. IP-CAN sessions)；
Wherein, PMIPv6 agreements are used between S-GW and P-GW；Flow includes the following steps shown in Fig. 2：
Step S201：UE is referred to as eNB to node B (eNodeB) the i.e. base stations of evolution and sends Attach Request message, request
Access EPS；
Step S202：ENodeB sends Attach Request message to MME；
Step S203：Network UE is authenticated and start Non-Access Stratum NAS (Non Access stratum) safely plus
Privacy protection；
Step S204：To UE certifications by rear, MME is interacted with HSS, execution position more new technological process；
Step S205：The default access point name APN (Access Point Name) that MME contracts according to user selects for UE
P-GW is selected, and selects S-GW, MME establishes default bearer request message to selected S-GW transmissions；There is not ambiguity below
In the case of with ' APN ' represent ' acquiescence APN '；
Step S206：BBERF in S-GW sends gateway control session to PCRF and establishes message, is carried in the message
User identifier network accessing identifier NAI (Network Access Identifier), PDN identify APN and present Access
Carrying attribute etc.；The gateway control session (Gxx sessions) that the message request is established is expressed as Gxx sessions 1；
Wherein, accessing net loaded attribute includes：IP-CAN types, BBERF addresses；May be used also in addition, accessing net loaded attribute
To include wireless access technology RAT (Radio Access Technology) type.IP-CAN types value is 3GPP- at this time
EPS, RAT type value are E-UTRAN.
Step S207：PCRF according to user identifier NAI and PDN identify APN obtain user signing information, so as to according to
The carrying attribute of the signing information at family, network strategy and present Access is (including IP-CAN types or IP-CAN types and RAT
Type) it generates strategy, the strategy that at this moment PCRF is formulated accesses the default policy of the APN for user, including PCC rules, QoS rules
And event trigger；
PCRF returns to gateway control session to BBERF and establishes confirmation message, and the QoS rules and event trigger of formulation are sent out
Give BBERF；BBERF installs and executes QoS rules and event trigger.
Step S208：The selected P-GW of S-GW MME into step S205 send agent binding update messages, in the message
User identifier NAI, PDN mark APN and the net loaded attribute of access are carried (including IP-CAN types or IP-CAN types and RAT classes
Type).
Step S209：P-GW asks the PDN connections established to distribute IP address for UE access, is expressed as IP Address1；
PCEF positioned at P-GW sends IP-CAN session establishment instruction messages to PCRF, and user identifier is carried in the message
NAI, PDN mark APN, IP Address1 and the net loaded attribute of access are (including IP-CAN types or IP-CAN types and RAT classes
Type) etc.；IP-CAN types value is 3GPP-EPS at this time, and RAT types value is E-UTRAN.Access in the message is net loaded
Attribute is to be obtained in step S208；The Gx sessions that the message request is established are expressed as Gx sessions 1.
Step S210：Gxx sessions 1 and Gx sessions 1 are associated by PCRF according to NAI and APN, i.e. Gxx sessions 1 and Gx meetings
Words 1 are used to carry out policy and charging control to the PDN connections (i.e. IP-CAN sessions) that UE requests are established；
Step S211：PCRF returns to IP-CAN session establishment confirmation messages to PCEF, and the PCC formulated in step S207 is advised
Then PCEF is sent to event trigger；PCEF installs and executes PCC rules and event trigger；
PCRF may be regular according to the net loaded attribute modification PCC rules of the access reported in step S209 and QoS, at this time
PCRF can the PCC rules of modification be sent respectively to PCEF with QoS rules and BBERF is updated.
Step S212：P-GW returns to proxy binding acknowledgment messages to S-GW, and IP Address1 are carried in the message；
Step S213：S-GW establishes default bearing response message to MME returns, and IP Address1 are carried in the message；
Step S214：MME returns to attachment received message to eNodeB, and IP Address1 are carried in the message；
Step S215：ENodeB returns to attachment received message to UE, and IP Address1 are carried in the message；
Step S216：UE sends attachment completion message to eNodeB；
Step S217：ENodeB sends attachment completion message to MME；
Step S218：MME and S-GW is updated the interaction flow of carrying；
Step S219：MME knows that UE can be established by non-3 GPP access, therefore by UE according to the signing information of user
The address of PDN connections (i.e. IP-CAN sessions) selected P-GW is sent to HSS, and HSS returns to response after preserving the P-GW addresses
Message.
By flow shown in Fig. 2, UE establishes the PDN connections (i.e. IP-CAN sessions) of acquiescence APN；Hereafter, UE can
With by the proprietary business of the connected reference, PCRF will be held according to business feature, user signing contract information, network strategy and access net
It carries the information such as attribute and formulates PCC rules and QoS rules.Due to being associated in step S210, PCRF can pass through
PCC rules are sent to PCEF and QoS rules are sent to BBERF by Gxx sessions 1 by Gx sessions 1.When BBERF passes through Gxx meetings
When QoS rules or modification QoS rules that words 1 please look for novelty, PCRF can also formulate corresponding PCC rules or the corresponding PCC rule of modification
Then, and pass through Gx sessions 1 and be sent to PCEF；Vice versa.
Fig. 3 is the flow chart that UE accesses EPC by trusted WLAN；Wherein, when being accessed by trusted WLAN, trusted
GTP or PMIPv6 agreements are used between WLAN and P-GW；Flow includes the following steps shown in Fig. 3：
Step S301：Perform 2 specific flow of trusted WLAN layers.
Step S302：UE, trusted non-WLAN and HSS/AAA perform EAP Extensible Authentication Protocols (Extensible
Authentication Protocol) verification process；
Step S303：Trusted WLAN sends to P-GW according to selection S2a interface protocols (GTP or PMIPv6) and creates session
Request or agent binding update messages carry user identifier NAI, PDN mark and the net loaded attribute of current access in the message
(including IP-CAN types or IP-CAN types and RAT types)；At this time IP-CAN types value be Non-3GPP-EPS, RAT classes
Type value is WLAN.
Step S304：P-GW distributes IP address for UE.IP-CAN session establishments are sent positioned at the PCEF of P-GW to PCRF to refer to
Show message, the net loaded attribute of new access obtained in step S303 is carried in the message, the Gx sessions of foundation are expressed as Gx meetings
Words 2.
Step S305：After PCRF formulates PCC strategies, confirmation message is returned to PCEF；
Step S306：P-GW will be interacted with AAA/HSS, and the address of itself is preserved；
Step S307：P-GW is returned to trusted WLAN creates session response/proxy binding acknowledgment messages, is taken in the message
Band IP Address；
Step S308：Trusted WLAN sends EAP success messages to UE, and EAP authentication is completed；
Step S309：The DHCPv4 message for distributing IPv4 addresses and/or the advertising of route message for carrying IPv6 prefixes are sent
To UE.UE performs IP layers of configuration.
At present after UE accesses EPC by trusted WLAN establishes PDN connections progress Operational Visit, do not support to 3GPP
The switching of access, therefore when UE needs to access by 3GPP, UE needs to establish new PDN connections using the flow of Fig. 2.However
When UE is accessed using Fig. 2, when the gateway control session that PCRF is received in step 206 establishes message, if the user's mark carried
Know and PDN marks are identical with the user identifier and PDN marks carried when being accessed by TWAN from step S304, PCRF can recognize
Switched for UE, Gx sessions 2 and Gxx sessions 1 are associated by such PCRF, and PCRF will be according to modification when TWAN is accessed
The corresponding qos policy of PCC policy developments for being is supplied to S-GW, and S-GW is caused to perform error.
The content of the invention
The technical problem to be solved in the present invention is to provide the processing methods and network element of a kind of policy control session, solve existing
Strategy execution Problem-Error caused by improper session association in technology.
In order to solve the above technical problem, the present invention provides a kind of processing method of policy control session, wherein, terminal
It is accessed by trusted WLAN (TWAN), tactful and charge execution function (PCEF) and strategy and charging regulation work(
Energy (PCRF) is established in the first Gx conversation procedures, and it is credible to notify that the PCRF delays correlating sessions indicate or represent that terminal passes through
Appoint the instruction of WLAN accesses；The PCRF receives gateway control session and establishes message and receive the instruction of the 2nd Gx session establishments
Afterwards, the gateway control session and the 2nd Gx sessions are associated.
Further, the above method can also have the characteristics that：
The PCRF is received after gateway control session establishes message, is not performed the gateway control session and described first
Gx session associations.
Further, the above method can also have the characteristics that：
The PCEF notifies the PCRF delays association when sending IP-CAN session establishment instruction messages to the PCRF
Indicate or represent the instruction that terminal is accessed by trusted WLAN.
Further, the above method can also have the characteristics that：
The PCRF is according to user identifier, packet data network (PDN) identifies, the carrying attribute of present Access is by described in
Gateway control session and the 2nd Gx sessions are associated；The carrying attribute includes IP connections access net session (IP-CAN)
Type further includes wireless access technology (RAT) type.
Further, the above method can also have the characteristics that：
The PCEF notifies the PCRF delays association instruction or represents the instruction that terminal is accessed by trusted WLAN
Condition be one kind in the following manner：
The PCEF judges that the terminal is accessed by trusted WLAN according to the address information of trusted WLAN；
Delay association instruction or table are carried in establishment session request or agent binding update messages that the PCEF is received
Show the instruction that terminal is accessed by trusted WLAN；
By being directed to, trusted WLAN accesses the specific IP-CAN types of scene formulation to the PCEF and/or RAT types are sentenced
Disconnected terminal is accessed by trusted WLAN.
In order to solve the above-mentioned technical problem, the present invention also provides a kind of processing sides of policy control session under roaming scence
Method, wherein, terminal is accessed by trusted WLAN (TWAN), and strategy and charge execution function (PCEF) are with visiting
Ground "Policy and Charging Rules Function (V-PCRF) is established in the first Gx conversation procedures, notify V-PCRF delay association instruction or
Person represents the instruction that terminal is accessed by trusted WLAN；The V-PCRF and ownership place PCRF (H-PCRF) establish S9 sessions and
First S9 sessions, and by first Gx session and the first S9 session associations；The V-PCRF receives gateway
After controlling session establishment message and receiving the instruction of the 2nd Gx session establishments, by the gateway control session and the 2nd Gx meetings
Words are associated；The V-PCRF and the H-PCRF establish the 2nd S9 sessions, and by the gateway control session, second
A Gx sessions and the 2nd S9 session associations.
In order to solve the above-mentioned technical problem, the present invention also provides a kind of packet data gateway, held including strategy and charging
Row function (PCEF), wherein, the PCEF, for when terminal is accessed by trusted WLAN (TWAN), with
"Policy and Charging Rules Function (PCRF) is established in the first Gx conversation procedures, notify PCRF delay correlating sessions instruction or
Represent the instruction that terminal is accessed by trusted WLAN.
Further, above-mentioned packet data gateway can also have the characteristics that：
The PCRF, be additionally operable to according to user identifier, packet data network (PDN) mark, present Access carrying category
The gateway control session and the 2nd Gx sessions are associated by property；The carrying attribute includes IP connections and accesses net session
(IP-CAN) type and/or wireless access technology (RAT) type.
Further, above-mentioned packet data gateway can also have the characteristics that：
The PCEF, also by the use of a kind of as notifying PCRF delay association instruction or represent in the following conditions
The condition that terminal passes through the trusted WLAN instructions accessed：
Judge that the terminal is accessed by trusted WLAN according to the address information of trusted WLAN；
Delay association instruction is carried in the establishment session request or agent binding update messages that receive or represents that terminal is led to
Cross the instruction of trusted WLAN accesses；
By being directed to, trusted WLAN accesses the specific IP-CAN types of scene formulation and/or RAT types judge that terminal is led to
Cross trusted WLAN accesses.
In order to solve the above-mentioned technical problem, the present invention also provides a kind of "Policy and Charging Rules Function (PCRF) entity,
Including strategy session control module；The strategy session control module, for passing through trusted WLAN in terminal
(TWAN) accessed, established with strategy and charge execution function (PCEF) in the first Gx conversation procedures, receive delay association meeting
Words instruction represents the instruction that is accessed by trusted WLAN of terminal, establishes message receiving gateway control session and receives
After the instruction of 2nd Gx session establishments, the gateway control session and the 2nd Gx sessions are associated.
Further, above-mentioned PCRF entities can also have the characteristics that：
The strategy session control module is additionally operable to receive after gateway control session establishes message, does not perform the net
Close control session and the first Gx session associations.
In order to solve the above-mentioned technical problem, the present invention also provides a kind of "Policy and Charging Rules Function (PCRF) entity,
Including strategy session control module；Strategy session control module, for being visited place strategy and charging regulation work(in the PCRF
During energy (V-PCRF), terminal is accessed by trusted WLAN (TWAN), with strategy and charge execution function
(PCEF) establish in the first Gx conversation procedures, receive delay association instruction or represent the finger that terminal is accessed by trusted WLAN
Show；It is additionally operable to establish S9 sessions and the first S9 sessions with ownership place PCRF (H-PCRF), and by first Gx session
With the first S9 session associations；It is additionally operable to receive gateway control session and establish message and receive the 2nd Gx session establishments to refer to
After showing, the gateway control session and the 2nd Gx sessions are associated；It is additionally operable to establish the 2nd S9 with the H-PCRF
Sub- session, and by the gateway control session, second Gx session and the 2nd S9 session associations.
The processing method of policy control session in this programme can be solved caused by improper session association in the prior art
Strategy execution Problem-Error.
Description of the drawings
Fig. 1 is the system architecture schematic diagram of EPS of the prior art；
Fig. 2 is that UE accesses EPS by E-UTRAN and establishes the initial attachment flow figure of PDN connections in the prior art；
Fig. 3 is that UE accesses EPS by trusted WLAN and establishes the initial attachment flow figure of PDN connections in the prior art
Flow chart；
Fig. 4 is the schematic diagram of the processing method of policy control session；
Fig. 5 is the flow chart of embodiment one；
Fig. 6 is flow chart when UE is accessed by trusted WLAN in embodiment two；
Fig. 7 is flow chart when UE is accessed by 3GPP in embodiment two.
Specific embodiment
As shown in figure 4, the processing method of policy control session includes：Terminal by trusted WLAN (TWAN) into
Row access, PCEF and PCRF are established in the first Gx conversation procedures, are notified the PCRF delays correlating sessions instruction or are represented eventually
Hold the instruction accessed by trusted WLAN；The PCRF receives gateway control session and establishes message and receive the 2nd Gx sessions
After establishing instruction, the gateway control session and the 2nd Gx sessions are associated.
The PCRF is received after gateway control session establishes message, is not performed the gateway control session and described first
Gx session associations.
The PCEF notifies the PCRF delays association when sending IP-CAN session establishment instruction messages to the PCRF
Indicate or represent the instruction that terminal is accessed by trusted WLAN.
The PCRF is according to user identifier, packet data network (PDN) identifies, the carrying attribute of present Access is by described in
Gateway control session and the 2nd Gx sessions are associated；The carrying attribute includes IP connections access net session (IP-CAN)
Type further includes wireless access technology (RAT) type.
The PCEF notifies the PCRF delays association instruction or represents the instruction that terminal is accessed by trusted WLAN
Condition be one kind in the following manner：
The PCEF judges that the terminal is accessed by trusted WLAN according to the address information of trusted WLAN；
Delay association instruction or table are carried in establishment session request or agent binding update messages that the PCEF is received
Show the instruction that terminal is accessed by trusted WLAN；
By being directed to, trusted WLAN accesses the specific IP-CAN types of scene formulation to the PCEF and/or RAT types are sentenced
Disconnected terminal is accessed by trusted WLAN.
According to the principle of the above method, the processing method of policy control session includes under roaming scence：Terminal passes through TWAN
It is accessed, PCEF and V-PCRF is established in the first Gx conversation procedures, is notified the V-PCRF delays association instruction or is represented
The instruction that terminal is accessed by trusted WLAN；
The V-PCRF and ownership place PCRF (H-PCRF) establish S9 sessions and the first S9 sessions, and by described first
A Gx sessions and the first S9 session associations；
The V-PCRF receive gateway control session establish message and receive the 2nd Gx session establishments instruction after, will described in
Gateway control session and the 2nd Gx sessions are associated；
The V-PCRF and the H-PCRF establish the 2nd S9 sessions, and by the gateway control session, second
Gx sessions and the 2nd S9 session associations.
Packet data gateway corresponding with the above method, including strategy and charge execution function (PCEF), wherein, it is described
PCEF for when terminal is accessed by TWAN, being established with PCRF in the first Gx conversation procedures, notifies the PCRF to postpone
Correlating sessions indicate or represent the instruction that terminal is accessed by trusted WLAN.
The PCRF, be additionally operable to according to user identifier, packet data network (PDN) mark, present Access carrying category
The gateway control session and the 2nd Gx sessions are associated by property；The carrying attribute includes IP connections and accesses net session
(IP-CAN) type and/or wireless access technology (RAT) type.
The PCEF, also by the use of a kind of as notifying PCRF delay association instruction or represent in the following conditions
The condition that terminal passes through the trusted WLAN instructions accessed：
Judge that the terminal is accessed by trusted WLAN according to the address information of trusted WLAN；
Delay association instruction is carried in the establishment session request or agent binding update messages that receive or represents that terminal is led to
Cross the instruction of trusted WLAN accesses；
By being directed to, trusted WLAN accesses the specific IP-CAN types of scene formulation and/or RAT types judge that terminal is led to
Cross trusted WLAN accesses.
PCRF entities corresponding with the above method, including strategy session control module；The strategy session control module is used
Accessed by TWAN in terminal, established with PCEF in the first Gx conversation procedures, receive delay correlating sessions instruction or
It represents the instruction that is accessed by trusted WLAN of terminal, establishes message receiving gateway control session and receive the 2nd Gx sessions
After establishing instruction, the gateway control session and the 2nd Gx sessions are associated.
The strategy session control module is additionally operable to receive after gateway control session establishes message, does not perform the net
Close control session and the first Gx session associations.
The strategy session control module in PCRF entities under roaming scence, for being visited place strategy in the PCRF
During with charging rule functions (V-PCRF), terminal is accessed by TWAN, is established with PCEF in the first Gx conversation procedures, is received
Delay association instruction represents the instruction that terminal is accessed by trusted WLAN；It is additionally operable to build with ownership place PCRF (H-PCRF)
Vertical S9 sessions and the first S9 sessions, and by first Gx session and the first S9 session associations；It is additionally operable to receive
After establishing message to gateway control session and receive the instruction of the 2nd Gx session establishments, by the gateway control session and described the
Two Gx sessions are associated；It is additionally operable to establish the 2nd S9 sessions with the H-PCRF, and by the gateway control session,
Two Gx sessions and the 2nd S9 session associations.
Embodiment one
Fig. 5 for UE under non-roaming scene, pass through trusted WLAN access EPC flow chart；Wherein, trusted is passed through
When WLAN is accessed, GTP or PMIPv6 agreements are used between trusted WLAN and P-GW；Flow includes the following steps shown in Fig. 5：
Step S501：Perform 2 specific flow of trusted WLAN layers.
Step S502：UE, trusted non-WLAN and HSS/AAA perform Extensible Authentication Protocol EAP (Extensible
Authentication Protocol) verification process；
Step S503：Trusted WLAN sends to P-GW according to selection S2a interface protocols (GTP or PMIPv6) and creates session
Request or agent binding update messages carry user identifier NAI, PDN mark and the net loaded attribute of current access in the message
(including IP-CAN types or IP-CAN types and/or RAT types)；
Step S504：P-GW distributes IP address for UE.IP-CAN session establishments are sent positioned at the PCEF of P-GW to PCRF to refer to
Show message, the user identifier obtained in step S503, PDN marks and the net loaded attribute of current access are carried in the message, is built
Vertical Gx sessions are expressed as Gx sessions 2.PCEF also carries delay association instruction or represents trusted WLAN accesses in the message
Instruction.
PCEF condition judgment can need to send above-mentioned instruction to PCRF as follows：
1) judge that UE is accessed by trusted WLAN according to the address information of TWAN；
2) TWAN directly carries delay association instruction in establishment session request or agent binding update messages or expression can
Trust the instruction of WLAN accesses
3) special IP-CAN types are formulated for TWAN access scenes and/or RAT types, PCEF is special according to this
IP-CAN types and/or RAT types judge that UE is accessed by trusted WLAN.The UE that PCEF reports this special to PCRF at this time
It is to be accessed by trusted WLAN, additional explicit instruction need not be carried
Step S505：After PCRF formulates PCC strategies, confirmation message is returned to PCEF.PCRF preserve delay association instruction or
Person represents the instruction of trusted WLAN accesses；
Step S506：P-GW will be interacted with AAA/HSS, and the address of itself is preserved；
Step S507：P-GW is returned to trusted WLAN creates session response/proxy binding acknowledgment messages, is taken in the message
Band IP Address；
Step S508：Trusted WLAN sends EAP success messages to UE, and EAP authentication is completed；
Step S509：The DHCPv4 message for distributing IPv4 addresses and/or the advertising of route message for carrying IPv6 prefixes are sent
To UE.UE performs IP layers of configuration.
Hereafter when UE needs to establish new PDN connections by 3GPP accesses using the flow of Fig. 2, when PCRF receives step
When gateway control session in rapid 206 establishes message, since PCRF has been obtained for delay association instruction or represents credible before
Appoint the instruction of WLAN accesses, therefore Gx sessions 2 and Gxx sessions 1 will not be associated (if prolonged before PCRF by PCRF
Association instruction late or the instruction for representing trusted WLAN accesses, therefore when PCRF receives gateway control session and establishes message, no
Will be considered that it is to be switched, therefore session association would not be performed), until the IP-CAN sessions that PCRF receives step S209 are built
During vertical instruction message, Gxx sessions 1 and Gx sessions 1 be just associated to (PCRF is according to user identifier, PDN marks and IP-CAN classes
Gxx sessions 1 and Gx sessions 1 are associated by type and/or RAT types).PCRF formulates PCC strategies, and according to PCC policy developments
Qos policy is sent to S-GW by qos policy by Gxx sessions 1.
Embodiment two
Fig. 6 for UE under local break-out roaming scence, pass through trusted WLAN access EPC flow chart；Wherein, by can
When trusting WLAN accesses, GTP or PMIPv6 agreements are used between trusted WLAN and P-GW；Flow shown in Fig. 6 includes following step
Suddenly：
Step S601：Perform 2 specific flow of trusted WLAN layers.
Step S602：The non-WLAN and HS S/AAA of UE, trusted perform Extensible Authentication Protocol EAP (Extensible
Authentication Protocol) verification process；
Step S603：Trusted WLAN sends to P-GW according to selection S2a interface protocols (GTP or PMIPv6) and creates session
Request or agent binding update messages carry user identifier NAI, PDN mark and the net loaded attribute of current access in the message
(including IP-CAN types or IP-CAN types and/or RAT types)；
Step S604：P-GW distributes IP address for UE, is identified as IP address1.PCEF positioned at P-GW is to V-PCRF
IP-CAN session establishment instruction messages are sent, is carried in the message in step S603 and obtains user identifier, PDN marks, IP
Address1 and the net loaded attribute of current access, the Gx sessions of foundation are expressed as Gx sessions 3.PCEF is also carried in the message to be prolonged
Association instruction late or the instruction for representing trusted WLAN accesses.
PCEF condition judgment can need to send above-mentioned instruction to V-PCRF as follows：
1) judge that UE is accessed by trusted WLAN according to the address information of TWAN；
2) TWAN directly carries delay association instruction in establishment session request or agent binding update messages or expression can
Trust the instruction of WLAN accesses
3) special IP-CAN types are formulated for TWAN access scenes and/or RAT types, PCEF is special according to this
IP-CAN types and/or RAT types judge that UE is accessed by trusted WLAN.PCEF reports this special to V-PCRF at this time
UE is accessed by trusted WLAN, need not carry additional explicit instruction
Step S605：PCRF preserves delay association instruction or represents the instruction of trusted WLAN accesses.V-PCRF according to
User identifier judges to establish S9 sessions not yet as the roaming service customer, therefore V-PCRF sends the instruction of S9 session establishments to H-PCRF
Message, request, which is established S9 sessions and passed through, establishes a S9 session (subsession), is identified as Subsession1.
Step S606：After H-PCRF formulates PCC strategies, confirmation message is returned to V-PCRF.H-PCRF preserves delay association
Indicate or represent the instruction of trusted WLAN accesses；
Step S607：V-PCRF returns to confirmation message to PCEF, provides the PCC rules that H-PCRF is issued；
Step S608：P-GW will be interacted with AAA/HSS, and the address of itself is preserved；
Step S609：P-GW is returned to trusted WLAN creates session response/proxy binding acknowledgment messages, is taken in the message
Band IP Address；
Step S610：Trusted WLAN sends EAP success messages to UE, and EAP authentication is completed；
Step S611：The DHCPv4 message for distributing IPv4 addresses and/or the advertising of route message for carrying IPv6 prefixes are sent
To UE.UE performs IP layers of configuration.
UE performs Fig. 6 flows, and establishing PDN connections by TWAN accesses carries out Operational Visit.In some time, UE determines logical
It crosses 3GPP accesses and carries out Operational Visit.Perform the flow of Fig. 7.
Fig. 7 is accessed for UE by 3GPP, using local break-out roaming, attachment flow figure.Wherein, between S-GW and P-GW
Using PMIPv6 agreements；Flow includes the following steps shown in Fig. 7：
Step S701：UE is referred to as eNB to node B (eNodeB) the i.e. base stations of evolution and sends Attach Request message, request
Access EPS；
Step S702：ENodeB sends Attach Request message to MME；
Step S703：Network UE is authenticated and start Non-Access Stratum NAS (Non Access stratum) safely plus
Privacy protection；
Step S704：To UE certifications by rear, MME is interacted with HSS, execution position more new technological process；
Step S705：The default access point name APN (Access Point Name) that MME contracts according to user selects for UE
P-GW is selected, and selects S-GW, MME establishes default bearer request message to selected S-GW transmissions；
Step S706：BBERF in S-GW sends gateway control session to V-PCRF and establishes message, is taken in the message
Carrying attribute with user identifier (such as NAI), PDN marks (such as APN) and present Access；The net that the message request is established
It closes control session (Gxx sessions) and is expressed as Gxx sessions 4；
Wherein, accessing net loaded attribute includes：IP-CAN types, BBERF addresses；May be used also in addition, accessing net loaded attribute
To include wireless access technology RAT (Radio Access Technology) type.IP-CAN types value is 3GPP- at this time
EPS, RAT type value are E-UTRAN.
Step S707：Delay association instruction is had been obtained for before V-PCRF or represents the finger of trusted WLAN accesses
Show.Therefore Gxx sessions 4 and Subession1 will not be associated that (V-PCRF knows by V-PCRF according to user identifier and PDN marks
Road this be that new PDN connections are established).V-PCRF sends S9 session modification instruction messages to H-PCRF, and request establishes one
New S9 sessions (subsession), are identified as Subsession 2；
Step S708：H-PCRF specifies acquiescence PCC rules according to information such as user's signings, and passes through S9 session confirmation messages
Return to V-PCRF；
Step S709：V-PCRF formulates QoS rules according to PCC rules.Gateway control session is returned to BBERF to establish really
Recognize message, give the QoS rules of formulation to BBERF；BBERF installs and executes QoS rules and event trigger.
Step S710：The selected P-GW of S-GW MME into step S705 send agent binding update messages, in the message
It carries user identifier, PDN marks and accesses net loaded attribute (including IP-CAN types or IP-CAN types and RAT types).Its
Middle P-GW is located at visited network；
Step S711：P-GW asks the PDN connections established to distribute IP address for UE access, is expressed as IP Address2；
PCEF positioned at P-GW sends IP-CAN session establishment instruction messages to PCRF, carry in the message user identifier, PDN marks,
IP Address2 and the net loaded attribute (including IP-CAN types or IP-CAN types and RAT types) of access etc.；The message please
The Gx sessions of foundation is asked to be expressed as Gx sessions 4.IP-CAN types value is 3GPP-EPS at this time, and RAT types value is E-
UTRAN。
Step S712：V-PCRF is according to user identifier and PDN marks and IP-CAN types and/or RAT types by Gxx meetings
4 and Gx of words sessions 4 are associated, and then Gx sessions 4 and Subsession2 is associated by V-PCRF.V-PCRF is to H-PCRF
S9 session modification message is sent, the information such as IP address2 are sent to H-PCRF by subsession 2；
Step S713：H-PCRF may update PCC rules, return to S9 session confirmation messages to V-PCRF, carry newer
PCC rules.
Step S714：V-PCRF returns to IP-CAN session establishment confirmation messages, the PCC that will be formulated in step S713 to PCEF
Rule is sent to PCEF；PCEF installs and executes PCC rules；
Step S715：P-GW returns to proxy binding acknowledgment messages to S-GW, and IP Address2 are carried in the message；
Step S716：S-GW establishes default bearing response message to MME returns, and IP Address2 are carried in the message；
Step S717：MME returns to attachment received message to eNodeB, and IP Address1 are carried in the message；
Step S718：ENodeB returns to attachment received message to UE, and IP Address2 are carried in the message；
Step S719：UE sends attachment completion message to eNodeB；
Step S720：ENodeB sends attachment completion message to MME；
Step S721：MME and S-GW is updated the interaction flow of carrying；
Step S722：MME knows that UE can be established by non-3 GPP access, therefore by UE according to the signing information of user
The address of PDN connections (i.e. IP-CAN sessions) selected P-GW is sent to HSS, and HSS returns to response after preserving the P-GW addresses
Message.
It should be noted that in the case where there is no conflict, the feature in embodiment and embodiment in the application can phase
Mutually any combination.
Certainly, the present invention can also have other various embodiments, without deviating from the spirit and substance of the present invention, ripe
Various corresponding changes and deformation, but these corresponding changes and deformation can be made according to the present invention by knowing those skilled in the art
The protection domain of appended claims of the invention should all be belonged to.
One of ordinary skill in the art will appreciate that all or part of step in the above method can be instructed by program
Related hardware is completed, and described program can be stored in computer readable storage medium, such as read-only memory, disk or CD
Deng.Optionally, all or part of step of above-described embodiment can also be realized using one or more integrated circuits.Accordingly
Ground, the form that hardware may be employed in each module/unit in above-described embodiment are realized, can also use the shape of software function module
Formula is realized.The present invention is not limited to the combinations of the hardware and software of any particular form.
Claims (10)
1. a kind of processing method of policy control session, wherein,
Terminal is accessed by trusted WLAN TWAN, and strategy and charge execution function PCEF are advised with strategy and charging
Then function PCRF is established in the first Gx conversation procedures, is notified PCRF delay correlating sessions instruction or is represented terminal by can
Trust the instruction of WLAN accesses；
The PCRF receive gateway control session establish message and receive the 2nd Gx session establishments instruction after, by the gateway control
Session processed and the 2nd Gx sessions are associated；Wherein, the PCRF is received after gateway control session establishes message, is not performed
By the gateway control session and the first Gx session associations.
2. the method as described in claim 1, which is characterized in that
The PCEF notifies the PCRF delays association instruction when sending IP-CAN session establishment instruction messages to the PCRF
Or represent the instruction that terminal is accessed by trusted WLAN.
3. the method as described in claim 1, which is characterized in that
The PCRF according to user identifier, packet data network PDN marks, present Access carrying attribute by the gateway control
Session processed and the 2nd Gx sessions are associated；It is described carrying attribute include IP connections access net session IP-CAN types or
Person further includes wireless access technology RAT types.
4. the method as described in claim 1, which is characterized in that
The PCEF notifies the PCRF delays association instruction or represents item of the terminal by the trusted WLAN instructions accessed
Part is one kind in the following manner：
The PCEF judges that the terminal is accessed by trusted WLAN according to the address information of trusted WLAN；
Delay association instruction is carried in establishment session request or agent binding update messages that the PCEF is received or is represented eventually
Hold the instruction accessed by trusted WLAN；
By being directed to, trusted WLAN accesses the specific IP-CAN types of scene formulation to the PCEF and/or RAT types judge eventually
End is accessed by trusted WLAN.
5. the processing method of policy control session under a kind of roaming scence, wherein,
Terminal is accessed by trusted WLAN TWAN, strategy and charge execution function PCEF and visited place it is tactful and
Charging rule functions V-PCRF is established in the first Gx conversation procedures, is notified the V-PCRF delays association instruction or is represented terminal
The instruction accessed by trusted WLAN；
The V-PCRF and ownership place PCRFH-PCRF establish S9 sessions and the first S9 sessions, and by first Gx meeting
Words and the first S9 session associations；
The V-PCRF receive gateway control session establish message and receive the 2nd Gx session establishments instruction after, by the gateway
Control session and the 2nd Gx sessions are associated；
The V-PCRF and the H-PCRF establish the 2nd S9 sessions, and by the gateway control session, second Gx meeting
Words and the 2nd S9 session associations；
Wherein, the V-PCRF is received after gateway control session establishes message, is not performed the gateway control session and described
First Gx session associations.
6. a kind of packet data gateway, including strategy and charge execution function PCEF, wherein,
The PCEF, for when terminal is accessed by trusted WLAN TWAN, with strategy and charging regulation work(
Energy PCRF is established in the first Gx conversation procedures, is notified the PCRF delays correlating sessions instruction or is represented that terminal passes through trusted
The instruction of WLAN accesses；Wherein, the PCRF is received after gateway control session establishes message, is not performed the gateway control meeting
Words and the first Gx session associations；
The PCRF receive gateway control session establish message and receive the 2nd Gx session establishments instruction after, by the gateway control
Session processed and the 2nd Gx sessions are associated.
7. packet data gateway as claimed in claim 6, wherein,
The PCRF, be additionally operable to according to user identifier, packet data network PDN marks, present Access carrying attribute by institute
It states gateway control session and the 2nd Gx sessions is associated；The carrying attribute includes IP connections access net session IP-CAN
Type and/or wireless access technology RAT types.
8. packet data gateway as claimed in claim 6, wherein,
The PCEF, also by the use of a kind of as notifying PCRF delay association instruction or represent terminal in the following conditions
Pass through the condition of the trusted WLAN instructions accessed：
Judge that the terminal is accessed by trusted WLAN according to the address information of trusted WLAN；
Delay association instruction is carried in the establishment session request or agent binding update messages that receive or represents terminal by can
Trust the instruction of WLAN accesses；
By being directed to, trusted WLAN accesses specific IP-CAN types that scene formulates and/or RAT types judge terminal by can
Trust WLAN accesses.
9. a kind of "Policy and Charging Rules Function PCRF entities, including strategy session control module；
The strategy session control module, for being accessed in terminal by trusted WLAN TWAN, with strategy and
Charge execution function PCEF is established in the first Gx conversation procedures, and it is credible that reception delay correlating sessions indicate or represent that terminal passes through
Appoint WLAN access instruction, receive gateway control session establish message and receive the 2nd Gx session establishments instruction after, by institute
It states gateway control session and the 2nd Gx sessions is associated；
Wherein, the PCRF is received after gateway control session establishes message, is not performed the gateway control session and described
One Gx session associations.
10. a kind of "Policy and Charging Rules Function PCRF entities, including strategy session control module；
Strategy session control module, for when the PCRF is visited place "Policy and Charging Rules Function V-PCRF, terminal to be led to
It crosses trusted WLAN TWAN to be accessed, be established with strategy and charge execution function PCEF in the first Gx conversation procedures,
It receives delay association instruction or represents the instruction that terminal is accessed by trusted WLAN；It is additionally operable to and ownership place PCRFH-PCRF
Establish S9 sessions and the first S9 sessions, and by first Gx session and the first S9 session associations；It is additionally operable to
It receives after gateway control session establishes message and receive the instruction of the 2nd Gx session establishments, by the gateway control session and described
2nd Gx sessions are associated；It is additionally operable to establish the 2nd S9 sessions with the H-PCRF, and by the gateway control session,
Second Gx session and the 2nd S9 session associations；
Wherein, the V-PCRF is received after gateway control session establishes message, is not performed the gateway control session and described
First Gx session associations.
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| CN103701597B (en) * | 2013-11-29 | 2016-11-16 | 中国电子科技集团公司第三十研究所 | A kind of control method of credible packet authentication |
| KR102318735B1 (en) * | 2014-06-23 | 2021-10-28 | 콘비다 와이어리스, 엘엘씨 | Inter-system mobility in integrated wireless networks |
| EP3295755B1 (en) * | 2015-05-12 | 2019-07-31 | Telefonaktiebolaget LM Ericsson (publ) | Method and nodes for handling access to epc services via a non-3gpp network |
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