| Summary: | 碩士 === 國立中正大學 === 資訊工程所 === 96 === Since sensor devices have limited resource constraints, design of energy aware routing or gathering algorithm is great important issue. In order to collect environmental information from event region over a long period of time, we propose a load-balancing scheme named GL scheme based on grid structure for data gathering in wireless sensor networks. In this scheme, each grid selects a sensor node as grid header to sense information and communicate to other grid headers. A complete data gathering process can divide into two phase, data aggregation phase and data dissemination phase. In data aggregation phase, it determinates a new source to replace old low energy source, and it collects information from other grid in event region. In data dissemination phase, it uses a method liked geographic and energy aware routing to route data. Therefore, we adopt GL scheme to distribute grid header’s responsibility. Finally, our simulation results show better performance than existing approaches.
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