Rendezvous scheme with resizable guard time selection

Multi-year operation on a single coin-cell battery in sensor nodes is a crucial issue for energy efficiency Wireless Sensor Networks. Several methods to solve this problem have been applied. In our solution, we use one simple, but efficient technique, named modified rendezvous scheme with resizable guard selection. With aim to achieve correct in-time wake-up of SNs, we have implemented some modification in respect to the standard rendezvous scheme. In this paper, we present how the proposed method has impact to the lifetime of a sensor node. With resizable guard periods, depending on the degree of time synchronization with neighbor sensor nodes, and its proper selection, we can extend the lifetime of a sensor node even for 3-5% for only 10 % resize of guard time.