Pausing keep-alive messages and roaming for virtual private...

Details Pausing keep-alive messages and roaming for virtual private... Pausing keep-alive messages and roaming for virtual private...

2010-03-02

2011-12-27

Doan, Phuoc (Department: 2617)

Multiplex communications

Communication over free space

Repeater

C455S434000, C455S466000

Reexamination Certificate

active

08085702

ABSTRACT:
Provided is a method, system and programming product for maintaining a connection between a mobile device and a server over a wireless network in a manner that conserves the power supply of the mobile device. The claimed subject matter addresses the transmission of regular “keep-alive” packets to refresh a network address translation (NAT) server and the scanning for and connecting to faster, higher priority network connections. A configurable parameter, or power timeout, specifies an idle time. When a period of time equal to the parameter has passed with no traffic between the mobile device and the server, in either direction, periodic roaming scans and keep-alive messages are halted. As soon as traffic is resumed through the tunnel, the mobile device roams to the highest priority connection and roaming scans and keep-alive messages are resumed.

REFERENCES:
patent: 5926404 (1999-07-01), Zeller et al.
patent: 6009325 (1999-12-01), Retzer et al.
patent: 7149556 (2006-12-01), Angelo et al.

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