Method, System And Apparatuses For Transferring Session Request

• US 20070204048A1
• Filed: 03/01/2007
• Published: 08/30/2007
• Est. Priority Date: 09/27/2005
• Status: Active Grant

• Current Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Inventors: Zhang, Tao
• Granted Patent: US 7,707,293 B2
• Time in Patent Office: Days
• US Class Current: 709/227
• CPC Class Codes: H04L 63/08 for authentication of entities cryptographic mechanisms or cryptographic arrangements for entity authentication H04L9/32
• CPC Class Codes: H04L 63/0892 by using authentication-authorization-accounting [AAA] servers or protocols
• CPC Class Codes: H04L 67/14 Session management for real-time applications in data packet communications networks H04L65/1066
• CPC Class Codes: H04W 76/10 Connection setup
• CPC Class Codes: H04W 80/04 Network layer protocols, e.g. mobile IP [Internet Protocol]
• CPC Class Codes: H04W 88/182 Network node acting on behalf of an other network entity, e.g. proxy

Abstract

A method for transferring a session request including: acquiring a routing table related to a session during establishing the session; the routing table recording the address information of an AAA proxy server related to the session; transferring a session request of the session according to the address information of the AAA servers recorded in the routing table upon receiving the session request of the session. A system and a plurality of apparatuses for transferring a session request are provided as well. By the solution, all session requests of the session may be ensured to be transferred via the same route.

Claims

1. A method for transferring a session request, comprising:

acquiring a routing table related to a session during establishing the session;

the routing table recording the address information of an Authentication, Authorization and Accounting (AAA) proxy server related to the session;

transferring a session request of the session according to the address information of the AAA proxy server recorded in the routing table upon receiving the session request of the session.

2. The method of claim 1, wherein the step of acquiring the routing table related to the session during establishing the session comprises:

sending, by an AAA client of a visited network of a terminal, a session establishment request of the session to a first AAA proxy server selected from the visited network of the terminal upon receiving the session establishment request of the session from the terminal;

writing, by the first AAA proxy server of the visited network of the terminal, the address information of the first AAA proxy server in the session establishment request of the session, and sending the session establishment request of the session to a destination AAA server selected from a home network of the terminal;

saving, by the destination AAA server of the home network of the terminal, the address information of the first AAA proxy server as the routing table related to the session;

sending, by the destination AAA server of the home network of the terminal, the routing table related to the session to the AAA client of the visited network of the terminal;

saving, by the AAA client of the visited network of the terminal, the routing table related to the session.

3. The method of claim 2, wherein the step of sending by the destination AAA server of the home network of the terminal the routing table related to the session to the AAA client of the visited network of the terminal comprises:

sending, by the destination AAA server of the home network of the terminal, the routing table to the first AAA proxy server of the visited network of the terminal according to the address information of the first AAA proxy server recorded in the routing table;

sending, by the first AAA proxy server of the visited network of the terminal, the routing table related to the session to the AAA client of the visited network of the terminal.

4. The method of claim 2, wherein the step of sending by the destination AAA server of the home network of the terminal the routing table related to the session to the AAA client of the visited network of the terminal comprises:

sending, by the destination AAA server of the home network of the terminal, a session establishment response of the session or other self-defined messages carrying the routing table related to the session to the AAA client of the visited network of the terminal.

5. The method of claim 2, wherein the step of transferring the session request of the session according to the address information of the AAA proxy servers recorded in the routing table comprises:

sending, by one party of the destination AAA server of the home network of the terminal and the AAA client of the visited network of the terminal, the session request of the session to the first AAA proxy server of the visited network of the terminal according to the address information of the first AAA proxy server recorded in the routing table related to the session;

sending, by the first AAA proxy server of the visited network of the terminal, the session request of the session to the other party of the destination AAA server of the home network of the terminal and the AAA client of the visited network of the terminal.

6. The method of claim 1, wherein there is an intermediate network between the visited network of the terminal and the home network of the terminal,

the step of acquiring the routing table related to the session comprises:

sending, by an AAA client of a visited network of a terminal, a session establishment request of the session to a first AAA proxy server selected from the visited network of the terminal upon receiving the session establishment request of the session from the terminal;

writing, by the first AAA proxy server of the visited network of the terminal, the address information of the first AAA proxy server in the session establishment request of the session, and sending the session establishment request of the session to an AAA proxy server selected from the intermediate network;

writing, by the AAA proxy server of the intermediate network, the address information of the AAA proxy server of the intermediate network in the session establishment request, and sending the session establishment request to a destination AAA server selected from the home network of the terminal;

saving, by the destination AAA server of the home network of the terminal, the address information of the first AAA proxy server and the address information of the AAA proxy server of the intermediate network as the routing table related to the session;

sending, by the destination AAA server of the home network of the terminal, the routing table related to the session to the AAA client of the visited network of the terminal;

saving, by the AAA client of the visited network of the terminal, the routing table related to the session.

7. The method of claim 6, wherein the intermediate network comprises one or more intermediate networks, and

the step of writing by the AAA proxy server of the intermediate network the address information of the AAA proxy server of the intermediate network in the session establishment request and sending the session establishment request to the destination AAA server of the home network of the terminal comprises:

writing, by an AAA proxy server of each intermediate network, the address information of itself in the session establishment request of the session upon receiving the session establishment request of the session, and sending the establishment request of the session to one of an AAA proxy server of a next intermediate network and the destination AAA server of the home network of the terminal.

8. The method of claim 6, wherein the step of sending by the destination AAA server of the home network of the terminal the routing table related to the session to the AAA client of the visited network of the terminal comprises:

sending, by the destination AAA server of the home network of the terminal, the routing table related to the session to the AAA proxy server of the intermediate network according to the address information of the AAA proxy server of the intermediate network recorded in the routing table related to the session;

sending, by the AAA proxy server of the intermediate network, the routing table related to the session to the first AAA proxy server of the visited network of the terminal according to the address information of the first AAA proxy server recorded in the routing table related to the session;

sending, by the first AAA proxy server of the visited network of the terminal, the routing table related to the session to the AAA client of the visited network of the terminal.

9. The method of claim 8, wherein the step of writing the address information in the session establishment request comprises:

writing the address information in the session establishment request successively in forward order;

the step of writing the address information of the AAA proxy server of the intermediate network in the session establishment request comprises;

writing, by the AAA proxy server of the intermediate network, the address information of the AAA proxy server of the intermediate network at the location that follows the address information of the first AAA proxy server in the session establishment request.

10. The method of claim 9, further comprising:

upon receiving the routing table related to the session,

saving, by the AAA proxy server of the intermediate network, the record of the address information of the AAA proxy server of the intermediate network to a last record of the routing table as a first routing table from the AAA proxy server of the intermediate network to the destination AAA server of the home network of the terminal, and saving the record of the address information of the AAA proxy server of the intermediate network to a first record of the routing table as a second routing table from the AAA proxy server of the intermediate network to the AAA client of the visited network of the terminal.

11. The method of claim 10, further comprising:

if the AAA proxy server of the intermediate network initiates a re-authentication request of the session to the destination AAA server of the home network of the terminal, sending the re-authentication request of the session to the destination AAA server of the home network of the terminal according to the first routing table;

if the AAA proxy server of the intermediate network initiates a re-authentication request of the session to the AAA client of the visited network of the terminal, sending the re-authentication request of the session to the AAA client of the visited network of the terminal according to the second routing table.

12. The method of claim 9, further comprising:

upon receiving the routing table related to the session,

saving, by the first AAA proxy server of the visited network of the terminal, the record of the address information of the first AAA proxy server to a last record of the routing table as a third routing table from the first AAA proxy server of the visited network of the terminal to the destination AAA server of the home network of the terminal, and saving the record of the address information of the first AAA proxy server to a last record of the routing table as a fourth routing table from the first AAA proxy server of the visited network of the terminal to the AAA client of the visited network of the terminal.

13. The method of claim 12, further comprising:

if the first AAA proxy server of the visited network of the terminal initiates a re-authentication request of the session to the destination AAA server, sending the re-authentication request of the session to the destination AAA server of the home network of the terminal according to the third routing table;

if the first AAA proxy server of the visited network of the terminal initiates a re-authentication request of the session to the AAA client of the visited network of the terminal, sending the re-authentication request of the session to the AAA client of the visited network of the terminal according to the fourth routing table.

14. The method of claim 6, wherein the step of transferring a session request of the session according to the address information of the AAA proxy server recorded in the routing table comprises:

sending, by the destination AAA server of the home network of the terminal, the session request of the session carrying the routing table related to the session to the AAA proxy server of the intermediate network according to the address information of the AAA proxy server of the intermediate network recorded in the routing table related to the session;

sending, by the AAA proxy server of the intermediate network, the session request of the session carrying the routing table related to the session to the first AAA proxy server of the visited network of the terminal according to the address information of the first AAA proxy server recorded in the routing table related to the session;

sending, by the first AAA proxy server of the visited network, the session request of the session carrying the routing table related to the session to the AAA client of the visited network of the terminal.

15. The method of claim 6, the step of transferring a session request of the session according to the address information of the AAA proxy server recorded in the routing table comprises:

sending, by the AAA client of the visited network of the terminal, the session request of the session carrying the routing table related to the session to the first AAA proxy server of the visited network of the terminal according to the address information of the first AAA proxy server recorded in the routing table related to the session;

sending, by the first AAA proxy server of the visited network of the terminal, the session request of the session carrying the routing table related to the session to the AAA proxy server of the intermediate network according to the address information of the AAA proxy server of the intermediate network recorded in the routing table related to the session;

sending, by the AAA proxy server of the intermediate network, the session request of the session carrying the routing table related to the session to the destination AAA server of the home network.

16. The method of claim 1, further comprising:

deleting, by the AAA proxy server, the address information of the AAA proxy server from the routing table related to the session upon receiving the session request of the session carrying the routing table related to the session.

17. The method of claim 1, further comprising:

maintaining, by the AAA proxy server related to the session, session state of the session according to the received session request of the session and making corresponding service processing according to the session state of the session.

18. The method of claim 2, further comprising:

setting a route parameter in the session establishment request of the session;

the step of writing address information in the session establishment request of the session comprising;

writing address information in the segments corresponding to the route parameter of the session establishment request of the session.

19. The method of claim 1, further comprising:

transferring all session requests of another session according to the routing table related to the session, wherein the another session and the session relate to the same visited network of the terminal and the same home network of the terminal.

20. The method of claim 1, wherein type of the session request of the session comprises one of a Diameter protocol and a remote authentication dial-in user service Radius protocol.

21. A method for transferring a session request, comprising:

setting, at an Authentication, Authorization and Accounting (AAA) client, a routing table from the AAA client to a destination AAA server of another network, the routing table recording the address information of all AAA proxy servers from the AAA client to the destination AAA server of another network;

sending, by the AAA client, a session request of the session carrying the routing table to the AAA proxy server according to the address information of the AAA servers recorded in the routing table upon receiving the session request of the session sending from a terminal and aiming at the destination AAA server;

sending, by the AAA proxy server, the session request of the session to the destination AAA server according to the address information of the AAA servers recorded in the routing table carried in the session request of the session.

22. A system for transferring a session request, comprising:

an Authentication, Authorization and Accounting (AAA) client of a visited network of a terminal, configured to select an AAA proxy server and send a session establishment request of a session to the AAA proxy server upon receiving the session establishment request of the session from the terminal;

the AAA proxy server, configured to acquire a routing table related to the session, send the session establishment request of the session carrying the routing table related the session to a destination AAA server of a home network of the terminal;

wherein the routing table records the address information of the AAA proxy server,

the destination AAA server of the home network of the terminal, configured to save the routing table related to the session, and send the routing table related to the session to the AAA client of the visited network of the terminal;

the AAA client of the visited network of the terminal, the AAA proxy server and the destination AAA server of the home network of the terminal further configured to transfer a session request of the session according the address information of the AAA proxy server recorded in the routing table related to the session.

23. The system of claim 22, wherein the AAA proxy server comprises:

a first AAA proxy server of the visited network of the terminal, configured to write the address information of the first AAA proxy server of the visited network of the terminal in the session establishment request of the session ,upon receiving the session establishment request of the session sent from the AAA client of the visited network of the terminal, and send the session establishment request of the session to the destination AAA server of the home network of the terminal;

the destination AAA server of the home network of the terminal comprises a first destination AAA server, configured to save the address information of the first AAA proxy server of the visited network of the terminal as the routing table related to the session, and send the routing table related to the session to the AAA client of the visited network of the terminal

24. The system of claim 22, wherein the AAA proxy server comprises:

a first AAA proxy server of the visited network of the terminal, configured to write the address information of the first AAA proxy server of the visited network of the terminal in the session establishment request of the session, upon receiving the session establishment request of the session sent from the AAA client of the visited network of the terminal, and send the session establishment request of the session to a selected AAA proxy server of an intermediate network;

the AAA proxy server of the intermediate network, configured to write the address information of the AAA proxy server of the intermediate network in the session establishment request and send the session establishment request to the destination AAA server of the home network of the terminal;

the destination AAA server of the home network of the terminal comprises a second destination AAA server, configured to save the address information of the first AAA proxy server of the visited network of the terminal, the address information of the AAA proxy server of the intermediate network as the routing table related to the session; and

sending the routing table related to the session to the AAA client of the visited network of the terminal.

25. An Authentication, Authorization and Accounting (AAA) client, comprising:

one or more components configured to;

receive and save a routing table related to a session recording address information of an AAA proxy server; and

transfer a session request of the session by selecting the AAA proxy server of the first network according to the address information of the AAA proxy server of the first network recorded in the routing table related to the session.

26. An Authentication, Authorization and Accounting (AAA) server, comprising:

one or more components configured to;

receive and save a routing table related to a session recording address information of an AAA proxy server; and

transfer a session request of the session by selecting the AAA proxy server of the second network according to the address information of the AAA proxy server of the second network recorded in the routing table related to the session.

27. An Authentication, Authorization and Accounting (AAA) proxy server, comprising:

a first component configured to;

write the address information of the AAA proxy server upon receiving a session establishment request of a session; and

select one of an AAA proxy server of another network, and a destination AAA server, and send the session establishment request of the session with the address information of the AAA proxy server written to the one of the AAA proxy server of the another network and the destination AAA server; and

select one of the AAA proxy server of the another network, an AAA client and the destination AAA server according to the address information of the AAA proxy server recorded in a routing table related to a session upon receiving a session request of the session carrying the routing table related to the session, and send the session request of the session to the one of the AAA proxy server of the another network, the AAA client and the destination AAA server.

28. The AAA proxy server of claim 27, further comprising:

a second component configured to;

save the routing table related to the session as a first routing table from the AAA proxy server to the AAA client, and a second routing table from the AAA proxy server to the destination AAA server, upon receiving a session request of the session carrying the routing table related to the session; and

initiate a session request of the session to the AAA client or to the destination AAA server respectively according to the first routing table or the second routing table.

29. The AAA proxy server of claim 27, further comprising:

a third component configured to;

delete the address information of the AAA proxy server from the routing table upon receiving the session request of the session carrying the routing table, and send the session request of the session carrying the routing table with the address information of the AAA proxy server deleted to one of the AAA proxy server of the another network, the AAA client and the destination AAA server according to the routing table.