To prolong the lifetime of wireless sensor network and reduce time delay on data collection,we propose a type of data gathering scheme based on grid with mobile Sinks.The network is firstly divided into several rectangular grids with uniform size,whose center just is stay point.The number of mobile Sinks is decided by the network scale as well as the total number of grids.Next,the data collection tree based on minimum single-hop distance is constructed in each grid to achieve lowpower consumption on data up...