Method and apparatus for battery life extension for nodes...

Details Method and apparatus for battery life extension for nodes... Method and apparatus for battery life extension for nodes...

2008-07-15

2008-07-15

Chan, Wing F. (Department: 2619)

Multiplex communications

Communication over free space

Signaling for performing battery saving

C370S338000, C455S343300, C455S574000

Reexamination Certificate

active

07400595

ABSTRACT:
An “identical beacons” field (401) is inserted near the beginning of a transmitted beacon (403) that contains either an integer equal to the number of consecutive identical beacons sent (i.e., identical to the one presently being transmitted) or a repetition bit indicating whether or not the beacon contains changed information when compared to a prior-sent beacon. After sleeping awhile, a node (302-304) wakes up, receives a first portion of the beacon containing the identical beacons field, and analyzes the identical beacons field. Based on the analysis, the node makes a decision on whether to remain “awake” for reception of the remaining beacon or to return to sleep.

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