基于异构竞争窗口优化的水下传感器网络MAC协议

摘要

传统水下传感器网络的MAC协议具有能耗过大、带宽资源不足等缺点,通过研究基于竞争窗口CW(Contention Win-dow)的CW-MAC协议无法完全保障信道利用公平性的缺陷,提出了两种基于异构竞争窗口优化策略的HCW-MAC协议,根据传感器节点的欧式距离差异对各节点所分配CW值的进行优化调整.本文采用NS-3仿真平台对CW-MAC与HCW-MAC协议分别进行了仿真比较,仿真结果验证了HCW-MAC协议的吞吐量与能耗性能均优于传统的CW-MAC协议.%The traditional MAC protocols for underwater sensor networks have some disadvantages,such as excessive energy consumption and insufficient bandwidth resources. Since the traditional CW-MAC(Contention Window based MAC)protocol can't fully guarantee the fairness of channel utilization,this paper proposes two kinds of CW-MAC improved protocols named as HCW-MAC protocols with differentiated competition window optimization strategy.Net-work throughput and energy consumption of CW-MAC and HCW-MAC protocols are simulated and compared with NS-3(Network Simulator-V3)platform.Simulation results verified that networks throughput and energy consumption performance of the proposed HCW-MAC protocols are superior to that of CW-MAC protocol.