Patent ID: 7961760

Claim:
A method for network synchronization, for synchronizing a node with an operating timing of a network, wherein a root of the network is a coordinator node, for defining sync-information, the method comprising: a. searching a parent node from other nodes already joined the network per time interval, when the node attempts to join the network, wherein the time interval corresponds to a first time interval if it is a first time the node attempts to join the network, and the time interval corresponds to a second time interval if the node had joined the network before, in which the second time interval is smaller than the first time interval; b. receiving the sync-information sent by the parent node if the parent node is found, so as to synchronize a timer in the node with the parent node, and entering a working mode; c. switching from the working mode to a sleeping mode, when a sleeping instruction sent by the parent node is received, or the timer determines that a network ending time is reached according to the sync-information, wherein the network ending time is when a network working period of the network is ended; and d. returning to Step a. to attempt to join the network again, when the timer determines that a network wakeup time is reached according to the sync-information, wherein the network wakeup time is when the next network working period of the network is started.