earticle

영어

Mobile wireless sensor networks without infrastructure are constructed including the mobile sink layer and the fixed sensor layer. The mobile sinks can communicate with the other mobile sinks. Every mobile sink receives data from the sensors and fuses to build a message. The message is copied, stored, and carried by mobile sinks and then it is transferred to the access point. In this paper, with multiple copies method of epidemic routing we present a probability forwarding scheme for message copies based on the threshold of nodes encountering each other. The method can decrease the message redundancy effectively, and control the waste of resource, bandwidth and energy arisen by a great deal of copies. At the same time, it guarantees the message transferred successfully. The theory analysis and the simulation experiment show that the delivery efficiency of our method is the same as one of epidemic routing, while the delay and the hop count do not increase and copies are fewer.