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A Lifetime-Guaranteed Routing Scheme in Wireless Sensor Networks

Authors: Wan Yeon Lee, Jae Keun Park, Sung Je Hong, Kyong Hoon Kim, Tae Heum Kang


In this paper, we propose a routing scheme that guarantees the residual lifetime of wireless sensor networks where each sensor node operates with a limited budget of battery energy. The scheme maximizes the communications QoS while sustaining the residual battery lifetime of the network for a specified duration. Communication paths of wireless nodes are translated into a directed acyclic graph(DAG) and the maximum-flow algorithm is applied to the graph. The found maximum flow are assigned to sender nodes, so as to maximize their communication QoS. Based on assigned flows, the scheme determines the routing path and the transmission rate of data packet so that any sensor node on the path would not exhaust its battery energy before a specified duration.

Keywords: Sensor Network, QoS, Battery, residual lifetime, routingscheme

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