Multiplex communications – Communication over free space – Message addressed to multiple destinations
Reexamination Certificate
2011-07-19
2011-07-19
Shah, Chirag G (Department: 2477)
Multiplex communications
Communication over free space
Message addressed to multiple destinations
C370S349000
Reexamination Certificate
active
07983207
ABSTRACT:
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.
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Huang Kuei-Li
Lai Jun-Yu
Tseng Chien-Chao
Wang Jui-Tang
Wu Chao-Nan
Muncy Geissler Olds & Lowe, PLLC
National Chiao Tung University
Nguyen Minh-Trang
Shah Chirag G
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