The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 19, 2011
Filed:
Jun. 16, 2009
Jun-yu Lai, Taipei County, TW;
Kuei-li Huang, Kaohsiung, TW;
Jui-tang Wang, Keelung, TW;
Chien-chao Tseng, Hsinchu, TW;
Chao-nan Wu, Taipei County, TW;
Jun-Yu Lai, Taipei County, TW;
Kuei-Li Huang, Kaohsiung, TW;
Jui-Tang Wang, Keelung, TW;
Chien-Chao Tseng, Hsinchu, TW;
Chao-Nan Wu, Taipei County, TW;
National Chiao Tung University, Hsinchu, TW;
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.