| 摘要 |
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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