Abstract: Geographic information provided by location technologies of moving target makes implementation of routing policy based on location information in Ad Hoc communication system becomes more concise in heterogeneous wireless network areas.However，wireless links often experience significant state fluctuations which will lead to inefficient geographic forwarding and even routing failure.A method of a link quality aware distributed topology control algorithm called LQ-GG is presented.High-quality connections will be selected by replacing some weak link（s） with alternative well-quality paths.Simulation results demonstrate that the link quality aware LQ-GG topology control algorithmic on GPSR is well suited to the ad hoc environment and the system performance is improved as compared to the traditional GPSR protocols at high mobility.

Key words: topology control, link quality, geographic routing

摘要： 在复杂的无线网络中，由移动目标定位技术提供的地理位置信息能将Ad Hoc 通信系统路由策略的实现变得更为简洁。但链路状态的高频率波动将导致无效的地理转发甚至路由失败，对此提出链路质量已知的分布式拓扑控制算法LQ-GG，通过选取优势路径替代低质量链路以换取高质量的链路连接。仿真结果表明在节点快速移动条件下，LQ-GG运用在地理路由GPSR中能够更好地适用于移动网络环境，比传统的单纯使用GPSR路由算法要高效很多。

关键词: 拓扑控制, 链路质量, 地理位置路由