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  Patent Title Inventor(s) Issue Date Patent Number Full Text
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.
System and method for time synchronization in a wireless network 		Gonia, Patrick S. , Kolavennu, Soumitri N. , Mahasenan, Arun V. , Budampati, Ramakrishna S. 03/30/2010 7,688,802
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A system includes a first cluster having multiple first wireless nodes. One first node is configured to act as a first cluster master, and other first nodes are configured to receive time synchronization information provided by the first cluster master. The system also includes a second cluster having one or more second wireless nodes. One second node is configured to act as a second cluster master, and any other second nodes configured to receive time synchronization information provided by the second cluster master. The system further includes a manager configured to merge the clusters into a combined cluster. One of the nodes is configured to act as a single cluster master for the combined cluster, and the other nodes are configured to receive time synchronization information provided by the single cluster master.
System and method for merging clusters of wireless nodes in a wireless network 		Budampati, Ramakrishna S. , Gonia, Patrick S. , Kolavennu, Soumitri N. , Mahasenan, Arun V. 05/29/2012 8,189,494
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