Preserving HTTP sessions in heterogeneous wireless environments

• US 7,567,809 B2
• Filed: 03/20/2006
• Issued: 07/28/2009
• Est. Priority Date: 02/05/2004
• Status: Active Grant

• Current Assignee: Telcordia Technologies Incorporated (Telefonaktiebolaget LM Ericsson), Toyota Motor Corporation
• Original Assignee: Telcordia Technologies Incorporated (Telefonaktiebolaget LM Ericsson), Toyota Motor Corporation
• Inventors: Chen, Wai, Ling, Yibei, Altintas, Onur
• Primary Examiner(s): ZEWDU, MELESS NMN
• Application Number:
  US11/384,590
• Publication Number:
  US 20060200559A1
• Time in Patent Office: 1,226 Days
• Field of Search: 4554321-4323, 455/435.1, 455/435.2, 455 632- 633, 4554561-4563, 4554565-4566, 455418-421, 455516-517, 455/550.1, 455/556.1, 455/556.2, 455557-558, 455560-561, 455433-434, 455/422.1, 455424-425, 455/466, 455/404.2, 455436-437, 455/440, 455/443, 455/448, 455/522, 455/552.1, 455/553.1, 370328-334, 370/338, 370/346, 370/348, 370/400, 370/395.5, 370/395.52, 370/395.53, 370401-402, 709/203, 709/242, 709218-219, 709228-229
• US Class Current: 455/436
• CPC Class Codes: H04L 67/02 based on web technology, e.g. hypertext transfer protocol [HTTP]
• CPC Class Codes: H04L 67/142 Managing session states for stateless protocols; Signalling session states; State transitions; Keeping-state mechanisms
• CPC Class Codes: H04L 67/2876 Pairs of inter-processing entities at each side of the network, e.g. split proxies
• CPC Class Codes: H04L 67/56 Provisioning of proxy services store-and-forward switching systems in data switching networks H04L12/54
• CPC Class Codes: H04W 36/0011 for data sessions of end-to-end connection
• CPC Class Codes: H04W 36/14 Reselecting a network or an air interface
• CPC Class Codes: H04W 80/12 Application layer protocols, e.g. WAP [Wireless Application Protocol]

Abstract

Wireless internet in the in-vehicle environment is an evolving reality that reflects the gradual convergence of wireless and internet technologies. The present invention provides an application layer system that makes wireless internet access adaptive to dynamically changing heterogeneous network environments, by stressing carrier-independence and access transparency. To achieve these objectives, the present invention provides the following features: HTTP session continuity and automatic HTTP failure recovery; network environment awareness and application-level preemptive handoff based on bandwidth capacity.

Claims

1. A computer readable medium having computer readable program for operating on a computer said program comprising instructions that cause the computer to perform as a proxy for use with a user device operating in a heterogeneous wireless network environment, said program comprising instructions that cause the computer to perform the steps of:

determining locally by concurrently combining both event-driven and polling-based schemes by said user device that said user device is in an area of overlap by where there are changed network conditions within said environment; and

handing off said user device from a first network to a second network within said heterogeneous wireless network environment.

2. The computer readable medium as set forth in claim 1, wherein said second network operates at a higher bandwidth than said first network.

3. The computer readable medium as set forth in claim 1, the program further comprising the step of tracking an ongoing session by said user device.

4. The computer readable medium as set forth in claim 3, wherein said tracking is byte counting.

5. The computer readable medium as set forth in claim 3, wherein said session is a SMTP session, a POP3 session, an IMAP session, or a streaming session.

6. A method of handing off a user device from a first network to a second network in a heterogeneous wireless network environment, said method comprising:

establishing a session on said user device with said first network;

determining locally by said user device, using an event-driven scheme to detect network events, concurrently using a polling-based scheme to collect general network conditions, and combining results from said event-driven scheme and said polling-based scheme, that said user device is in an area of overlap where said first network and said second network have different network conditions; and

handing off said user device from said first network to said second network within said heterogeneous wireless network environment initiated by said user device.

7. The method according to claim 6, wherein said second network operates at a higher bandwidth than said first network.

8. The method according to claim 6, further including the step of tracking a byte count of said session.

9. The method according to claim 6, wherein said session is a SMTP session, a POP3 session, an IMAP session, or a streaming session.

10. An architecture for use in a heterogeneous wireless network environment, said architecture comprising:

a user device having an installed web browser;

a web server;

a computer readable medium having computer readable program for operating on a

computer said program comprising instructions that cause the computer to perform as a proxy interposed between said web browser and the heterogeneous wireless network environment;

said program comprising instructions that cause the computer to perform the steps of;

determining by concurrently combining both event-driven and polling-based schemes that said user device is in an area of overlap where there are changed network conditions within said environment; and

handing off said user device from a first network to a second network within said heterogeneous environment initiated by said proxy disposed in said user device; and

an information gateway interposed between the heterogeneous wireless network environment and said web server.

11. The architecture according to claim 10, wherein said second network operates at a higher bandwidth than said first network.

12. The architecture according to claim 10, wherein said program further includes the step of tracking an ongoing session by said user device.

13. The architecture according to claim 12, wherein said tracking is byte counting.