延迟容忍移动传感器网络中基于最优距离的可靠节能传输策略

在延迟容忍移动传感器网络（Delay Tolerant Mobile Senor Networks,DTMSN）的数据传输过程中容易出现数据丢失及节点因能量耗尽而导致网络生存时间减少的问题.针对上述问题本文提出了基于最优距离的可靠节能传输策略,该传输策略利用距离与能量的关系解决了DTMSN中的三个重要问题：可靠性、能源效率、网络生存时间.首先,在链路质量保证下,引入了"可靠节能距离"和"可靠能量平衡距离"两个概念.此外,通过分析节点间距离、节点运动方向及节点当前剩余能量来确定节点的综合效用值,最后根据综合效用值的大小来路由消息.实验结果表明,该策略显著提高了消息的投递率及可靠性保证下传感器节点的能量利用率,延长了网络的生存时间.

Energy-Efficient Reliable Transmission Strategy Based on Optimal Distance in Delay Tolerant Mobile Sensor Networks

In the data transmission process of the delay tolerant mobile sensor networks,the data is easy to get lost and the network lifetime decreases due to energy exhaustion.We propose an energy-efficient reliable transmission strategy based on the optimal distance.The transmission strategy addresses three important requirements for DTMSN:reliability,energy-efficiency and network lifetime.First,the notions of "reliable energy-efficient distance" and "reliable energy-balanced distance" are introduced under the link quality assurance.In addition,the comprehensive utility value of the node is determined by analyzing the distance between nodes,the moving direction of the node and the current residual energy of the node.Finally,the messages are forward according to the comprehensive utility value.The simulation results show that the strategy can improve the energy utilization of the sensor nodes and prolong the network lifetime in the guarantee of delivery ratio and the reliability of the messages.