Multimedia communication using co-located care of address for bearer traffic

• US 7,924,771 B2
• Filed: 04/12/2005
• Issued: 04/12/2011
• Est. Priority Date: 04/13/2004
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Mahendran, Arungundram C., Hsu, Raymond Tah-Sheng
• Primary Examiner(s): Vu; Thong H
• Application Number:
  US11/104,957
• Publication Number:
  US 20050265278A1
• Time in Patent Office: 2,191 Days
• Field of Search: 370/338, 370/401, 370/349, 370/353, 370/396, 370/351, 370/331, 709/246, 709/230, 709/245, 709/219, 709/206, 709/227
• US Class Current: 370/328
• CPC Class Codes: H04L 12/64 Hybrid switching systems
• CPC Class Codes: H04W 72/04 Wireless resource allocation
• CPC Class Codes: H04W 8/26 Network addressing or numbering for mobility support
• CPC Class Codes: H04W 80/04 Network layer protocols, e.g. mobile IP [Internet Protocol]
• CPC Class Codes: H04W 80/10 adapted for application session management, e.g. SIP [Session Initiation Protocol] connection management H04W76/00; arrangements for session management H04L67/14
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]

Abstract

In a wireless communications system in which a mobile node seeks a communication session with a correspondent node by first signaling for initialization of the communication session through a first data path via an intermediate node. Thereafter, contents of the communication is established through a second data path in which the mobile node and the correspondent node communicate straightforwardly without going through the intermediate node.

Claims

1. A method in a wireless communication system, comprising:

acquiring a first source address and a second source address of a mobile node located in a foreign network, wherein the first source address is a home address of the mobile node in a home network and the second source address is a co-located care-of address of the mobile node in the foreign network;

signaling, using said first source address, a request to the home network to initialize a communication session between the mobile node in the foreign network and a correspondent node located in a remote network; and

transmitting, from the foreign network to the remote network, contents of said communication session to the correspondent node using said second source address.

2. The method of claim 1 further including signaling for initialization of said communication session via a first communication path, and transmitting said contents of said communication session via a second communication path.

3. The method of claim 2 wherein said transmitting said contents includes transmitting said contents in a first foreign network, said method further including updating said co-located care of address during said transmitting said contents in a second foreign network.

4. The method of claim 2, wherein the first communication path includes a session initiation signaling path and the second communication path includes a data traffic bearing path.

5. The method of claim 1, wherein the signaling further comprises:

transmitting, to the home network, a request to initiation the communication session;

receiving, from the home network, a token confirming the correspondent node accepted an invitation sent from the home network to join the communication session;

transmitting the token to the foreign network; and

receiving, from the foreign network, confirmation that the communication session is established.

6. An apparatus in a wireless communication system, comprising:

means for acquiring first source address and second source address of a mobile node located in a foreign network, wherein the first source address is a home address of the mobile node in a home network and the second source address is a co-located care-of address of the mobile node in the foreign network;

means for signaling, using said first source address, a request to the home network to initialize a communication session between the mobile node in the foreign network and a correspondent node located in a remote network; and

means for transmitting, from the foreign network to the remote network, contents of said communication session to the correspondent node using said second source address.

7. The apparatus of claim 6 further including means for signaling for initialization of said communication session via a first communication path, and means for transmitting said contents of said communication session via a second communication path.

8. The apparatus of claim 7 further including means for updating said co-located care of address when said apparatus moves from one foreign network to another foreign network in said wireless communication system.

9. The apparatus of claim 7, wherein the first communication path includes a session initiation signaling path and the second communication path includes a data traffic bearing path.

10. The apparatus of claim 6, wherein the means for signaling further comprises:

means for transmitting, to the home network, a request to initiation the communication session;

means for receiving, from the home network, a token confirming the correspondent node accepted an invitation sent from the home network to join the communication session;

means for transmitting the token to the foreign network; and

means for receiving, from the foreign network, confirmation that the communication session is established.

11. An apparatus in a communication system, comprising:

a memory circuit having computer-readable instructions for

acquiring first source address and second source address of a mobile node located in a foreign network, wherein the first source address is a home address of the mobile node in a home network and the second source address is a co-located care-of address of the mobile node in the foreign network,

signaling, using said first source address, a request to the home network to initialize a communication session between the mobile node in the foreign network and a correspondent node located in a remote network, and

transmitting, from the foreign network to the remote network, contents of said communication session to the correspondent node using said second source address; and

a processor circuit coupled to said memory circuit for processing said computer-readable instructions.

12. The apparatus of claim 11 wherein said memory circuit further including computer-readable instructions for signaling for initialization of said communication session via a first communication path, and transmitting said contents of said communication session via a second communication path.

13. The apparatus of claim 12 wherein said memory circuit further including computer-readable instructions for updating said co-located care of address when said apparatus moves from a first foreign network to a second foreign network in said communication system.

14. The apparatus of claim 11, wherein said memory circuit further including computer-readable instructions for:

transmitting, to the home network, a request to initiation the communication session;

receiving, from the home network, a token confirming the correspondent node accepted an invitation sent from the home network to join the communication session;

transmitting the token to the foreign network; and

receiving, from the foreign network, confirmation that the communication session is established.

15. The apparatus of claim 11, wherein the first communication path includes a session initiation signaling path and the second communication path includes a data traffic bearing path.

16. A Non-transitory computer-readable medium comprising computer-executable instructions for:

acquiring first source address and second source address of a mobile node located in a foreign network, wherein the first source address is a home address of the mobile node in a home network and the second source address is a co-located care-of address of the mobile node in the foreign network;

signaling, through a first communication path using said first source address, a request to the home network to initialize a communication session between the mobile node in the foreign network and a correspondent node located in a remote network; and

transmitting contents of said communication session through a second communication path to the correspondent node using said second source address, wherein the second communication path runs between the foreign network to the remote network.

17. The computer-readable medium of claim 16 further comprising computer-readable instructions for updating said second address when one of said first and second nodes moves from one network to another network in said wireless communication system.

18. The computer-readable medium of claim 16 further comprising computer-readable instructions for

transmitting, to the home network, a request to initiation the communication session;

receiving, from the home network, a token confirming the correspondent node accepted an invitation sent from the home network to join the communication session;

transmitting the token to the foreign network; and

receiving, from the foreign network, confirmation that the communication session is established.

19. The computer-readable medium of claim 16, wherein the first communication path includes a session initiation signaling path and the second communication path includes a data traffic bearing path.