Browsing by Author "LAI, Jun-Yu"

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ROUTING METHOD AND ROUTING PATH RECOVERY MECHANISM IN WIRELESS SENSOR NETWORK ENVIRONMENT
(2010-10-14)
LAI, Jun-Yu
;
Huang, Kuei-Li
;
Wang, Jui-Tang
;
Tseng, Chien-Chao
;
Wu, Chao-Nan
The present invention discloses an asymmetric routing method and routing path recovery mechanism. The wireless sensor network environment includes at least a management unit, at least a gateway, and mobile nodes. When joining, each mobile node obtains an unique ID code and, additionally, a depth as the gradient to the management unit. Accordingly, a mobile node sends an uplink packet via a nearby node with lower depth to the management unit; while the management unit transmits a downlink packet to a mobile node by utilizing the source route method. When the parent node of a mobile node is damaged or moves to another position or said mobile node with its sub-tree descendants changes their position together, the uplink routing path is recovered via selecting a nearby node of the sub-tree as relay node and the downlink routing path is recovered via sending a control message to the management unit.