中文摘要：

网络生命周期是评价能量受限无线网络性能的重要指标之一，如何有效延长网络生命周期是影响该类无线网络实际应用的重要问题，优化发射功率或节约能耗是比较常见的解决方法之一。针对直接和协作2种传输链路，将协作通信技术与路由机制相结合，并基于节点的位置信息，提出一种最大化网络生命周期的协作路由算法。该算法在保证一定中断率的前提下，运用非线性规划方法求解最优发射功率，进而构建由节点发射能耗、接收能耗和剩余能量组成的权值代价公式。然后，基于Dijkstra’s最短路径，依据权值代价公式建立从源节点到目的节点的协作路由。仿真实验结果表明，该算法可以降低节点的发射功率，减少节点的能量消耗，从而有效的延长网络生命周期。

英文摘要：

Lifetime is one of the important performance parameter for energy-constrained wireless network, and how to extend the lifetime is a critical issue in practical applications of wireless network. Saving energy or optimizing the transmission power is one of the most common methods. For direct and cooperative transmission link, a lifetime maxi- mizing cooperative routing algorithm is proposed based on node＇ s location information, in which cooperative commu- nication is associated with routing mechanism. While guaranteeing the outage rate at a certain level, nonlinear pro- gramming problem is specified to obtain the optimal transmission power. Then, the link costs formula is given, which is constructed by representing transmission energy with optimal transmission power, receiving energy and node＇ s re- sidual energy. On the basis of the Dijkstra＇ s shortest path, the link costs formula is used to construct the route from source node to destination node. The simulation results show that this algorithm can reduce the transmission power and save energy consumption of nodes to extend network lifetime effectively.