Scan Line Based Sensor Nodes Schedule Algorithm

System lifetime is very important to wireless sensor networks.Under the precondition of keeping performance,through sensor nodes schedule,i.e.some work while others sleep,system lifetime can be prolonged effectively.As the performance of present schedule algorithms aren’t good,a scan line based sensor nodes schedule algorithm is proposed.In this algorithm,monitor region of node is approximated to scan lines by which redundant node is judged.Simulations show that the performance of this algorithm is good.The number of active nodes generated by schedule is about 91% of present algorithms and average coverage is about 1.84.