earticle

영어

In order to improve the WSN, a novel WSN protocol based on the event-driven named PB-TDMA is proposed. One of the problems in the WSN protocol is that each node’s probability of data delivery is usually diverse at different time and environment. This paper puts forward a method to resolve such a problem. It makes two nodes with different probability share a time slot which could use to compress the frame length and enhance the utilization ratio of channel. In addition, through running statistics on the probability of each node’s data sending, it proposes a new allocation method of time slot to avoid data collision. On the basis of the above strategy, we can constantly update the delivery rate to achieve the goal of adaptive. Simulation results show that PB-TDMA protocol performs better for wireless sensor network with high-density deployment and moderate load.