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Lifetime Maximizing Routing Algorithm for Multi-hop Wireless Networks  

Lee, Keon-Taek (연세대학교 컴퓨터과학과)
Han, Seung-Jae (연세대학교 컴퓨터과학과)
Park, Sun-Ju (연세대학교 경영학과)
Abstract
In multi-hop wireless networks like Wireless Mesh Networks (WMN) and Wireless Sensor Networks (WSN), nodes often rely on batteries as their power source. In such cases, energy efficient routing is critical. Many schemes have been proposed to find the most energy efficient path, but most of them do not achieve optimality on network lifetime. Once found, the energy efficient path is constantly used such that the energy of the nodes on the path is depleted quickly. As an alternative, the approaches that dynamically change the path at run time have also been proposed. These approaches, however, involve high overhead of establishing multiple paths. In this paper, we first find an optimal multi-path routing using LP. Then we apply an approximation algorithm to derive a near-optimal solution for single-path routing. We compare the performance of the proposed scheme with several other existing algorithms through simulation.
Keywords
Multi-hop wireless networks; lifetime maximization; routing; approximation algorithm;
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