Traditional EDSR routing protocol always transmits information to all neighboring nodes.When much routing requests occur

it is easy to induce that the network breaks down.This paper presents a locationaided routing by LAR routing procotol which makes up a zone with the destination node’s position information for selecting routing.The proposed routing algorithm can avoid flooding in the whole network.Besides

the distance update threshold is set up to reach the balance between real time ability and accuracy of location information of node

the routing selection optimization depends on the value of weight Qpath.