Mobile target tracking is an important application in wireless sensor networks（WSNs）

in which introducing sleep scheduling can greatly reduce the energy consumption.A sleep scheduling protocol for target tracking in sensor networks is proposed for the actual demand of the target tracking application.This algorithm respectively designs two sleep schedulings for different phases of target tracking.It also provides a scheduling strategy how to wake up the sensor node guarantee to continue tracking it

when the mobile target lost.The experimental result show that this algorithm can greatly reduce the energy consumption

as well as ensure the tracking quality.