Motorola Corporation

Motorola Solutions, Inc.

Edgar H Callaway

Paul Edward Gorday

David B Taubenheim

Monique J Bourgeois

Frederick L Martin

Monique B Brown

An 'identical beacons' field () is inserted near the beginning of a transmitted beacon () 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 (-) 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.

Method and apparatus for battery life extension for nodes within beaconing networks

A method and apparatus for reducing power consumption within a wireless receiver is provided herein. Particularly, the use of partial chip sequence correlation to reduce the average power consumption of a direct sequence spread spectrum (DSSS) wireless transceiver is provided herein. During operation, the receiver will attempt to correlate, or de-spread, less than all chips that constitute a symbol. A partial correlation may be performed on M chips, where M may be much less than N, the number of chips that represent a whole symbol. In a preferred embodiment, the M chips are the first M chips in the symbol.

Method and apparatus for reducing power consumption within a wireless receiver

A direct sequence spread spectrum (DSSS) receiver () consistent with certain embodiments has a frequency generator () that generates a local oscillator signal without use of a piezoelectric crystal. A frequency converter () receives the local oscillator signal and mixes the local oscillator signal with a received DSSS signal to produce a down-converted signal. The received DSSS signal is encoded using a first set of DSSS code. A differential chip detector () receives the down-converted signal and converts the down-converted signal to a differentially detected signal. A correlator () receives the differentially detected signal and correlates the detected signal with a set of DSSS codes that are time-shifted from the first set of DSSS codes. This abstract is not to be considered limiting, since other embodiments may deviate from the features described in this abstract.

Communication device

An 'identical beacons' field () is inserted near the beginning of a transmitted beacon () 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 () 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.

Growing community of inventors

Boca Raton, FL, United States of America

Edgar H Callaway