Enable Energy Efficiency of Object Tracking using Sentinel based Multisensor Sleep Scheduling

Abstract

<p>As a way of lifetime extension, the energy efficiency&nbsp;has become a crucial criterion in the design of&nbsp;object tracking sensor networks (OTSN). In this paper,&nbsp;we propose a sentinel based sleep scheduling called Sleep&nbsp;Scheduling Protocol (SSP) to reduce the number of the&nbsp;awakened sensor nodes with less performance loss while&nbsp;existing solutions either suffer from increasing of event&nbsp;detecting delays or computing overhead. SSP is built upon&nbsp;cluster based network structure. Each cluster contains group&nbsp;of sensor nodes divided in terms of geometric information.&nbsp;Sentinels will be selected from each cluster for probing&nbsp;object moving trajectory and maintaining communication routes. In the approach, sentinels will remain active or be&nbsp;scheduled to periodic sleep. The rest of the nodes remain&nbsp;sleeping until being waked up by sentinels and only maintain&nbsp;low communication power to stay accessible for energy&nbsp;saving. We compare SSP with three sleep based scheduling&nbsp;protocols via simulation. The results show that SSP can&nbsp;reduce average energy consumption but with reasonable&nbsp;detection probability and delay.&nbsp;&nbsp;</p