Hierarchical Role-based Data Dissemination with Mobile Sinks

• Main Authors: Guo-He Ye, 葉國禾
• Other Authors: Jiun-Long Huang
• Format: Others
• Language: en_US
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/25712237735821582449

碩士 === 國立交通大學 === 資訊科學與工程研究所 === 96 === In wireless sensor networks, sensor nodes are capable of not only measuring real world phenomena, but also storing, processing, and transferring these measurements. Many protocols have been proposed for disseminating event data. However, most of them still bring some challenges to multiple mobile sinks. In this paper, we propose the Hierarchical Role-based Data Dissemination approach, named HRDD, with multiple mobile sinks for large-scale wireless sensor networks. In HRDD, we use a hierarchical cluster-based structure to discover and maintain the routing paths for distributing data to the mobile sink. We assign two roles, called Indexing Agent and Gateway Agent to some sensors in the wireless sensor networks. Indexing Agents are used to avoid unnecessarily transferring the query messages, while Gateway Agents are used to decrease energy consumption of broadcasting and number of flooding messages. We evaluate and compare the communication cost and message complexity of HRDD with previous approaches. Our results show that HRDD is able to reduces the energy consumption of the wireless sensor networks and achieve longer network lifetime.