Wireless sensor networks (WSNs) have been broadly studied with advances in ubiquitous computing environment. Because the\nresource of a sensor node is limited, it is important to use energy-efficient routing protocol inWSNs.The cluster-based routing is\nan efficient way to reduce energy consumption by decreasing the number of transmitted messages to the sink node. LEACH is the\nmost popular cluster-based routing protocol, which provides an adaptive cluster generation and cluster header rotation. However,\nits communication range is limited since it assumes a direct communication between sensor nodes and a sink node. To resolve\nthis problem, we propose a new energy-efficient cluster-based routing protocol, which adopts a centralized clustering approach to\nselect cluster headers by generating a representative path. To support reliable data communication, we propose a multihop routing\nprotocol that allows both intra- and intercluster communications. Based on a message success rate and a representative path, the\nsensor nodes are uniformly distributed in clusters so that the lifetime of network can be prolonged. Through performance analysis,\nwe show that our energy-efficient routing protocol outperforms the existing protocols up to 2 times, in terms of the distribution of\ncluster members, the energy consumption, and the reliability of a sensor network.
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