Date Added: May 2012
In Chain-type Wireless Sensor Networks (CWSNs), sensor nodes closer to the Base Station (BS) need to receive and transmit more packets, resulting in more energy consumption and shorter lifetime. Due to the friability of the CWSN's topology, the short lifetime of nodes closer to the BS usually limits the CWSN lifetime. To enhance the CWSN lifetime, in this paper, the authors propose a novel sensor nodes deployment strategy. With a non-uniform deployment method and an alternative duty mode, the proposed strategy can balance the energy consumption of sensor nodes in CWSNs. Hence, the CWSN lifetime can be effectively prolonged.