层次无线传感器网络中骨干层MAC协议设计

针对层次无线传感器网络中骨干层数据量大、高负载的业务特点,从减少冲突碰撞概率、降低重传开销和适时休眠三个方面考虑设计了一种骨干层MAC协议(GBN-MAC)。GBN-MAC根据节点收到的RTS(Request To Send)帧和分片数据帧进行休眠,使用临时通信标识符降低分片传输的额外开销。仿真结果表明在高负载下,GBN-MAC协议能够在基本保持网络时延和吞吐量的情况下明显降低能量消耗,可以较好地满足骨干层设计要求。

MAC Protocol Design for Bone Network of Layer WSN

To the characteristics of great data traffic and high load of bone WSN, GBN-MAC is designed from three aspects including less collision, lower retransmission spending and timing dormancy. In this protocol, the radio of nodes is turned off when the node has heard a RTS or fragment data frame. Temporary communication identification is used to reduce overhead made by data fragment. Simulation analysis shows GBN-MAC can keep high throughput under high load with energy saving at the same time.