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System and method for time synchronization in a wireless network

United States Patent

7,688,802
March 30, 2010
View the Complete Patent at the US Patent & Trademark Office
A system includes multiple wireless nodes forming a cluster in a wireless network, where each wireless node is configured to communicate and exchange data wirelessly based on a clock. One of the wireless nodes is configured to operate as a cluster master. Each of the other wireless nodes is configured to (i) receive time synchronization information from a parent node, (ii) adjust its clock based on the received time synchronization information, and (iii) broadcast time synchronization information based on the time synchronization information received by that wireless node. The time synchronization information received by each of the other wireless nodes is based on time synchronization information provided by the cluster master so that the other wireless nodes substantially synchronize their clocks with the clock of the cluster master.
Gonia; Patrick S. (Maplewood, MN), Kolavennu; Soumitri N. (Blaine, MN), Mahasenan; Arun V. (Kerala, IN), Budampati; Ramakrishna S. (Maple Grove, MN)
Honeywell International Inc. (Morristown, NJ)
12/ 464,030
20090290572
May 11, 2009
GOVERNMENTAL RIGHTS The U.S. Government has a paid-up license in this invention and the right in limited circumstances to require the patent owner to license others on reasonable terms as provided for by the terms of a contract awarded by the Department of Energy.