CN106792613B - Session binding method and system - Google Patents

Session binding method and system Download PDF

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Publication number
CN106792613B
CN106792613B CN201510829056.2A CN201510829056A CN106792613B CN 106792613 B CN106792613 B CN 106792613B CN 201510829056 A CN201510829056 A CN 201510829056A CN 106792613 B CN106792613 B CN 106792613B
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user
address
pcrf
session
dra
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CN106792613A (en
Inventor
何宇锋
林奕琳
刘洁
张岚
吴敏清
程淑荣
黎明雪
曹磊
王波
王哲
区洪辉
张�雄
李志强
刁益辉
王庆扬
张琳峰
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China Telecom Corp Ltd
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China Telecom Corp Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/24—Accounting or billing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/14—Charging, metering or billing arrangements for data wireline or wireless communications
    • H04L12/1403—Architecture for metering, charging or billing
    • H04L12/1407—Policy-and-charging control [PCC] architecture
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
    • H04W8/08—Mobility data transfer
    • H04W8/082—Mobility data transfer for traffic bypassing of mobility servers, e.g. location registers, home PLMNs or home agents
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
    • H04W8/08—Mobility data transfer
    • H04W8/10—Mobility data transfer between location register and external networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
    • H04W8/08—Mobility data transfer
    • H04W8/12—Mobility data transfer between location registers or mobility servers

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Databases & Information Systems (AREA)
  • Business, Economics & Management (AREA)
  • Accounting & Taxation (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention provides a session binding method and a session binding system, and relates to the field of intelligent pipelines. The session binding method comprises the following steps: after obtaining the AF session establishment request, the capability open platform generates an Rx session message according to the AF session establishment request and sends the Rx session message to the DRA; the DRA determines a PCEF identification according to a user public network IP address in the Rx session message, determines a home PCRF identification of the user according to a user private network IP address and the PCEF identification, roams the Rx session message to a user home DRA according to the home PCRF identification, and forwards the Rx session message to the home PCRF so as to finish session binding. By the method, the DRA can determine the attribution PCEF identification according to the user public network IP address, and then determine the attribution PCRF identification of the user according to the user private network IP address and the PCEF identification, so that the Rx session message is sent to the attribution PCRF, and the session binding is realized.

Description

Session binding method and system
Technical Field
The invention relates to the field of intelligent pipelines, in particular to a session binding method and a session binding system.
Background
The intelligent pipeline capability is open in an LBO (Local Breakout) scene, and the following problems need to be solved:
problem 1: routing addressing, an ott (over The top) application generally only contains information of a private Network IP address (core Network allocation) and a public Network IP address (NAT (Network address translation) scenario) of a user in a request message sent to an intelligent pipeline capability open platform, and a core Network side can only address a visiting province according to The user public Network IP address, and cannot solve The problem that an Rx message should be routed to a PCRF (Policy and Charging Rules Function) of a user home province.
Problem 2: session binding, when an lte (long Term evolution) user accesses multiple APNs (Access point names), there is an address pool scenario where different APNs have the same private network IP address field, and different APNs can be on different PCEFs, so that the PCRF in the province to which the user belongs cannot complete Rx/Gx session binding only according to the user private network IP address information.
Disclosure of Invention
One objective of the present invention is to provide a scheme for finding a service PCRF to which a user belongs.
According to an aspect of the present invention, a session binding method is provided, including: after acquiring an AF (Application Function) session establishment request from an Application server, the capability opening platform generates an Rx session message according to the AF session establishment request and sends the Rx session message to a DRA (Diameter Routing Agent), wherein the Rx session message comprises a user public network IP address and a user private network IP address; the DRA determines the identity of a PCEF (Policy and Charging Enforcement Function) according to the IP address of the public network of the user in the Rx session message; the DRA determines the attributive PCRF identification of the user according to the private network IP address of the user and the PCEF identification; and the DRA modifies the Rx session message according to the home PCRF identification, roams the Rx session message to the user home DRA and forwards the Rx session message to the home PCRF so as to finish the session binding.
Further, the DRA determines the PCEF identifier according to the user public network IP address in the Rx session message and based on the stored corresponding relation between the PCEF identifier and the public network IP address domain.
Further, the DRA determines the PCRF identification of the user according to the private network IP address of the user and the PCEF identification and based on the corresponding relation between the stored associated data of the private network IP address of the user and the PCEF identification and the PCRF of the attribution of the user.
Further, after obtaining the PCRF identifier, the DRA judges the attribution of the PCRF; if the PCRF identifier is located locally, the DRA directly sends the modified Rx session message to a corresponding home PCRF; and if the PCRF identification is not located locally, executing the step of roaming the Rx session message to the DRA of the user home.
Further, still include: when a foreign user roams to the local, the DRA generates a corresponding relation table of the user private Network IP address, the attributive PCRF identification and the PCEF identification according to an IP-CAN (IP-connectivity Access Network) conversation.
Further, the correspondence table specifically includes: [ (subscriber identity, subscriber private Network IP address), PDN (public data Network) identity, PCRF identity, PCEF identity ].
By the method, the DRA can determine the attribution PCEF identification according to the user public network IP address in the Rx session message, and then determine the attribution PCRF identification of the user according to the user private network IP address and the PCEF identification, so that the Rx session message is sent to the attribution PCRF, and the session binding is realized.
According to another aspect of the present invention, there is provided a session binding system, including: the capability open platform is used for generating Rx session information according to the AF session establishment request and sending the Rx session information to the DRA after the AF session establishment request of the application function is acquired from the application server, wherein the Rx session information comprises the user public network IP address and the user private network IP address; the routing agent node DRA is used for determining a PCEF identifier according to the IP address of the user public network in the Rx session message; determining an attributive PCRF identification of the user according to the private network IP address of the user and the PCEF identification; and modifying the Rx session message according to the home PCRF identification, roaming the Rx session message to the DRA of the user home, so as to forward the Rx session message to the home PCRF, and completing the session binding.
Further, the DRA determines the PCEF identifier according to the user public network IP address in the Rx session message and based on the stored corresponding relation between the PCEF identifier and the public network IP address domain.
Further, the DRA determines the PCRF identification of the user according to the private network IP address of the user and the PCEF identification and based on the corresponding relation between the stored associated data of the private network IP address of the user and the PCEF identification and the PCRF of the attribution of the user.
Further, the DRA is also used for judging the attribution of the PCRF after acquiring the PCRF identifier; if the PCRF identifier is located locally, the DRA directly sends the modified Rx session message to a corresponding home PCRF; and if the PCRF identification is not located locally, executing the step of roaming the Rx session message to the DRA of the user home.
Further, the DRA is also for: when the foreign user roams to the local, generating a corresponding relation table of the user private network IP address, the attributive PCRF identification and the PCEF identification according to the IP connection access network IP-CAN conversation.
Further, the correspondence table specifically includes: [ (subscriber identity, subscriber private network IP address), PDN identity, PCRF identity, PCEF identity ].
In the system, the DRA can determine the attribution PCEF identification according to the user public network IP address in the Rx session message, and then determine the attribution PCRF identification of the user according to the user private network IP address and the PCEF identification, so that the Rx session message is sent to the attribution PCRF, and the session binding is realized.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
fig. 1 is a flowchart of an embodiment of a session binding method of the present invention.
Fig. 2 is a flowchart of another embodiment of the session binding method of the present invention.
Fig. 3 is a signaling interaction diagram of another embodiment of the session binding method of the present invention.
Fig. 4 is a schematic diagram of an embodiment of a session binding system of the present invention.
Fig. 5 is a network architecture diagram of another embodiment of the session binding system of the present invention.
Detailed Description
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
A flow diagram of one embodiment of a session binding method of the present invention is shown in fig. 1.
In step 101, the capability openness platform obtains an application function AF session establishment request from an application server. The AF session establishment request may include information about the user's public network IP address and the user's private network IP address.
In step 102, the capability openness platform generates an Rx session message according to the AF session establishment request and sends the Rx session message to the DRA. The Rx session message includes the user public network IP address and the user private network IP address.
In step 103, the DRA determines the PCEF identity according to the user public network IP address in the Rx session message. The corresponding IP address field of the user public network IP address has a corresponding relation with the PCEF, and the corresponding IP address field can be searched according to the user public network IP address, so that the corresponding PCEF is determined.
In step 104, the DRA determines the home PCRF identifier of the user based on the association information between the user private network IP address and the PCEF identifier and the PCRF identifier according to the user private network IP address and the PCEF identifier.
In step 105, the DRA modifies the Rx session message according to the home PCRF identification, roams the Rx session message to the user home DRA, and forwards the same to the home PCRF, so as to complete the session binding.
By the method, the DRA can determine the attribution PCEF identification according to the user public network IP address in the Rx session message, and then determine the attribution PCRF identification of the user according to the user private network IP address and the PCEF identification, so that the Rx session message is sent to the attribution PCRF, and the session binding is realized.
In one embodiment, the DRA determines the PCRF identification of the user based on a correspondence between stored association data of the user private network IP address and the PCEF identification and the home PCRF of the user, according to the user private network IP address and the PCEF identification. Because the situation that different APNs have the same private network IP address field exists in the case that LTE accesses multiple APNs, and the different APNs can be located on different PCEF, the unique PCRF can be determined by combining the user private network IP address and the PCEF identifier.
A flow diagram of another embodiment of the session binding method of the present invention is shown in fig. 2.
In step 201, the capability openness platform obtains an application function AF session establishment request from an application server. The AF session establishment request may include information about the user's public network IP address and the user's private network IP address.
In step 202, the capability openness platform generates an Rx session message according to the AF session establishment request and sends the Rx session message to the DRA. The Rx session message includes the user public network IP address and the user private network IP address.
In step 203, the DRA determines the PCEF identity according to the user public network IP address in the Rx session message. The corresponding IP address field of the user public network IP address has a corresponding relation with the PCEF, and the corresponding IP address field can be searched according to the user public network IP address, so that the corresponding PCEF is determined.
In step 204, the DRA determines the home PCRF identifier of the user based on the association information between the user private network IP address and the PCEF identifier and the PCRF identifier according to the user private network IP address and the PCEF identifier.
In step 205, the DRA determines whether the PCRF is located locally. If the PCRF is located locally, it indicates that the user is a user belonging to the local, and step 206 is executed; if the PCRF is not located locally, it indicates that the user is a foreign user, and step 207 is executed.
In step 206, the DRA modifies the Rx session message according to the found user home PCRF identifier, and forwards the Rx session message to the home PCRF, completing the PCRF finding procedure, without executing other steps in fig. 2.
In step 207, the DRA modifies the Rx session message according to the home PCRF identification, roams the Rx session message to the user home DRA, and forwards the same to the home PCRF, so as to complete the session binding.
By the method, the DRA can judge whether the user is a local user, so that the Rx message is forwarded to the home PCRF according to the home of the user, and the session binding is realized.
A signaling interaction diagram of yet another embodiment of the session binding method of the present invention is shown in fig. 3.
In 301, a session is established through interaction control between a visited BBERF (bearer Binding and Event Report Function) node and a PCRF node of a user home.
In 302, a user connects to a visited PCEF and establishes an IP-CAN session between the PCEF and a home PCRF. The DRA stores the identification information of the home PCRF of the user, and also stores the IP address of the private network of the user and the identification information of the PCEF.
In 303, the application server receives the request from the user terminal, and then obtains the public network IP address and the private network IP address of the terminal, and obtains the address of the capability open platform.
In 304, the application server sends an AF session establishment request including a public network IP address and a private network IP address to the capability openness platform based on an HTTP (HyperText Transfer Protocol) POST request.
In 305, the capability openness platform sends an Rx message including user public network and private network IP address information to the DRA based on the Diameter protocol.
The DRA determines a user IP address Domain according to the user public network IP address information so as to determine a PCEF identifier, and replaces the value of an IP-Domain-id AVP field in the Rx session message with the value of the PCEF identifier; and determining a corresponding PCRF identifier according to the information of the [ user private network IP address + PCEF identifier ], and filling the corresponding PCRF identifier into a Destination-Host AVP field of the Rx session message. The modified Rx session message is routed to the home DRA. And the DRA of the attribution area forwards the Rx session message to the attribution PCRF with the session binding information.
In 306, the home PCRF returns response information based on the Diameter protocol, and completes the binding of Rx and Gx sessions.
In 307, the DRA returns an HTTP 201CREATED status code to the application server as a response.
By the method, when the user roams to a different place, the DRA can store the home PCRF, the private network IP address and the PCEF information of the user when the session is established, so that the home PCRF identification of the user can be acquired when the application server issues the message through the capability open platform, and the session binding can be realized.
In one embodiment, when a foreign user roams to the local, the DRA CAN generate and store a corresponding relation table of a user private network IP address, a home PCRF identifier and a PCEF identifier according to the IP-CAN session. In one embodiment, the correspondence table may include [ (subscriber identity, subscriber private network IP address), PDN identity, PCRF identity, PCEF identity ]. By the method, the DRA can store the corresponding relation among the user private network IP address, the attribution PCRF identifier and the PCEF identifier, so that the user attribution PCRF can be determined according to the user public network IP address and the private network IP address, and the session binding can be completed.
In one embodiment, the DRA deletes the stored user-related information when the user is normally offline. The method can ensure that the DRA has enough storage space, and can ensure that the information stored by the DRA is updated in time without conflict, thereby improving the stability of the method.
A schematic diagram of one embodiment of a session binding system of the present invention is shown in fig. 4. The capability openness platform 401 may receive an AF session establishment request from an application server, generate an Rx session message according to the AF session establishment request, and send the Rx session message to the DRA. The AF session establishment request includes user public network IP address information and private network IP address information, and the Rx session message generated by the capability opening platform 401 also includes user public network IP address information and private network IP address information. DRA402 can determine PCEF identifier according to the user public network IP address in the Rx session message; determining an attribution Policy and Charging Rule Function (PCRF) identifier of a user according to the IP address of the private network of the user and the PCEF identifier; and modifying the Rx session message according to the home PCRF identification, roaming the Rx session message to the DRA of the user home, so as to forward the Rx session message to the home PCRF, and completing the session binding.
In the system, the DRA can determine the attribution PCEF identification according to the user public network IP address in the Rx session message, and then determine the attribution PCRF identification of the user according to the user private network IP address and the PCEF identification, so that the Rx session message is sent to the attribution PCRF, and the session binding is realized.
In one embodiment, the DRA is configured with a correspondence of a public network IP address field to a PCEF. And the DRA further determines a corresponding PCEF identifier according to the public network IP address domain where the public network IP address is located. The system can determine the PCEF connected with the user according to the IP address of the public network of the user so as to determine the corresponding PCRF according to the IP address of the private network of the user and the PCEF, thereby realizing session binding,
in one embodiment, the DRA determines the PCRF identification of the user based on a correspondence between stored association data of the user private network IP address and the PCEF identification and the home PCRF of the user, according to the user private network IP address and the PCEF identification. Because the situation that different APNs have the same private network IP address field exists in the case that LTE accesses multiple APNs, and the different APNs can be located on different PCEF, the unique PCRF can be determined by combining the user private network IP address and the PCEF identifier.
In one embodiment, the DRA may further be capable of determining a home of the PCRF from the determined PCRF identification. If the PCRF is located locally, the user is a local user, and the DRA directly sends the modified Rx session message to a corresponding home PCRF; if the PCRF is located in a different place, the user is a roaming user, the DRA roams the modified Rx session message to the DRA of the user home location, and the DRA of the home location forwards the Rx session message to the corresponding PCRF.
In the system, when the user roams to a different place, the different-place DRA can successfully acquire the PCRF to which the user belongs and forward the Rx message to the corresponding PCRF, thereby realizing session binding.
In one embodiment, when a foreign user roams to the local, the local DRA CAN generate and store a corresponding relation table of the user private network IP address, the home PCRF identification and the PCEF identification according to the IP-CAN session. In one embodiment, the correspondence table may include [ (subscriber identity, subscriber private network IP address), PDN identity, PCRF identity, PCEF identity ]. In the system, the DRA can store the corresponding relation among the user private network IP address, the attribution PCRF identifier and the PCEF identifier, so that the user attribution PCRF can be determined according to the user public network IP address and the private network IP address, and the session binding can be completed.
A network architecture diagram of one embodiment of the session binding system of the present invention is shown in fig. 5. The user who belongs to province 2 and roams to province 1 is connected with PCEF1 through a base station, and the PCRF belonging to the user is PCRF 4. After the user roams into the LTE network, the Gx message of the initial attach roams to the PCRF4 according to the user information (e.g. MDN (Mobile Directory Number)/IMSI (International Mobile Subscriber identity)). The DRA stores a PCRF4 identifier of origin-Host AVP in the initial response CCA message, and simultaneously stores binding information such as a user private network IP address, a PCEF1 identifier and the like. When a user accesses the APP to call the intelligent pipeline capability, the application server acquires the public/private network IP address of the user and issues an AF session establishment request to the capability open platform. And the capability open platform generates an Rx session message containing the IP address information of the public/private network of the user and sends the Rx session message to the DRA signaling network. The DRA1 is configured with the relation between the IP address of the user public network and the PCEF identifier, the value of the IP-Domain-id AVP in the Rx message is replaced by the value of the PCEF1 identifier in the DRA binding information, and meanwhile, the PCRF identifier is obtained from the DRA binding information according to the information of [ the IP address of the user private network + the PCEF identifier ], and is filled into the Destination-Host AVP field. And the DRA signaling network roams the Rx session message to the province of the user according to Destination-Host AVP, and finds out the PCRF4 stored with the session binding information. And the PCRF4 completes the session binding of Rx and Gx according to the information of the (user private network IP address + IP-Domain-id).
Through the system, based on the existing protocol and information, the DRA can store the corresponding relation among the user private network IP address, the attribution PCRF identifier and the PCEF identifier, so that the user attribution PCRF can be determined according to the user public network IP address and the private network IP address, and the session binding can be completed.
In one embodiment, the DRA deletes the stored user-related information when the user is normally offline. The system can ensure that the DRA has enough storage space, and can ensure that the information stored by the DRA is updated in time without conflict, thereby improving the stability of the method.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.

Claims (10)

1. A session binding method, comprising:
when a foreign user roams to the local, the routing agent node DRA generates a corresponding relation table of a user private network IP address, an attribution policy and charging rule function unit (PCRF) identifier and a policy and charging execution function unit (PCEF) identifier according to an IP connection access network IP-CAN session;
after acquiring an application function AF session establishment request from an application server, the capability open platform generates an Rx session message according to the AF session establishment request and sends the Rx session message to the DRA, wherein the Rx session message comprises a user public network IP address and a user private network IP address;
the DRA determines a PCEF identifier according to the IP address of the user public network in the Rx session message;
the DRA determines the attributive CRF identification of the user according to the private network IP address of the user and the PCEF identification;
the DRA modifies Rx session information according to the attribution PCRF identification, roams the Rx session information to a user attribution DRA and forwards the Rx session information to the attribution PCRF so as to finish session binding;
and when the user is offline, deleting the stored user information by the DRA.
2. The method of claim 1, wherein the DRA determines the PCEF identity based on a correspondence between the stored PCEF identity and a public network IP address field, according to the user public network IP address in the Rx session message.
3. The method of claim 1,
and the DRA determines the PCRF identification of the user according to the private network IP address of the user and the PCEF identification and based on the corresponding relation between the stored associated data of the private network IP address of the user and the PCEF identification and the PCRF of the attribution of the user.
4. The method of claim 1, wherein the DRA determines a home location of the PCRF after acquiring the PCRF identification;
if the PCRF identifier is located locally, the DRA directly sends the modified Rx session message to a corresponding home PCRF;
and if the PCRF identification is not located locally, executing the step of roaming the Rx session message to a DRA (user home address).
5. The method of claim 1, wherein the correspondence table specifically comprises: [ (subscriber identity, subscriber private network IP address), public data network PDN identity, PCRF identity, PCEF identity ].
6. A session binding system, comprising:
the system comprises an ability open platform, a routing agent node DRA and a server, wherein the ability open platform is used for generating an Rx session message according to an AF session establishment request and sending the Rx session message to the routing agent node DRA after the AF session establishment request of an application function is acquired from an application server, and the Rx session message comprises a user public network IP address and a user private network IP address;
the routing agent node DRA is used for generating a corresponding relation table of a user private network IP address, an attribution policy and charging rule function unit (PCRF) identifier and a policy and charging execution function unit (PCEF) identifier according to an IP connection access network IP-CAN session when a foreign user roams to the local; determining a PCEF identifier according to the IP address of the user public network in the Rx session message; determining the home PCRF identification of the user according to the private network IP address of the user and the PCEF identification; modifying Rx session information according to the attribution PCRF identification, roaming the Rx session information to a DRA of a user attribution so as to forward the Rx session information to the attribution PCRF and finish session binding; and when the user is offline, deleting the stored user information.
7. The system of claim 6, wherein the DRA determines the PCEF identifier based on a stored correspondence between the PCEF identifier and a public network IP address field according to the user public network IP address in the Rx session message.
8. The system of claim 6,
and the DRA determines the PCRF identification of the user according to the private network IP address of the user and the PCEF identification and based on the corresponding relation between the stored associated data of the private network IP address of the user and the PCEF identification and the PCRF of the attribution of the user.
9. The system of claim 6, wherein the DRA is further configured to determine a home location of the PCRF after obtaining the PCRF identification;
if the PCRF identifier is located locally, the DRA directly sends the modified Rx session message to a corresponding home PCRF;
and if the PCRF identification is not located locally, executing the step of roaming the Rx session message to a DRA (user home address).
10. The system according to claim 6, wherein said correspondence table specifically comprises: [ (subscriber identity, subscriber private network IP address), PDN identity, PCRF identity, PCEF identity ].
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