Patent ID: 8208485
Filing Date: 2012-06-26
Classification: H04L,H04W,Y02D

Abstract:
1. A routing method of a wireless network system, the routing method comprising: (a) forming a down-stream path with a linear structure and an up-stream path with a mesh structure; and (b) resetting the up-stream path for each predetermined period, or whenever a network is changed, or whenever data transmission fails more than a predetermined number of times, wherein (b) comprises: (b1) transmitting a path reset command in order of hop count by using the sink node; (b2) checking whether a hop count included in the path reset command corresponds to a hop count of a node that receives the path reset command by using the node; (b3) transmitting data for resetting a path for a transmission period of the node when the hop count does not correspond to the hop count of the node; (b4) receiving data for resetting the path from upper nodes by operating in a receiving mode for a parent selection period when the hop count corresponds to the hop count of the node; and (b5) setting one of upper nodes, which transmit data for resetting the path, to a parent node of the node.