摘要
为了研究如何选择移动Ad Hoc网络保持连通的临界传输半径,定义了反映随机路点运动模型对临界传输半径影响的本质参量停留概率.该参量反映了网络趋于静止的趋势,并由更新理论推导出停留概率与随机路点运动模型的运动参数停留时间,最小速度和最大速度之间的关系式.仿真结果表明,运动参数通过本质参量停留概率而影响临界传输半径.给定运动参数,便可确定停留概率,如果停留概率小于0.5,运动时的临界传输半径比静止时大10%,否则二者可近似认为相等.
The effect of mobility on the critical transmitting range in wireless Ad Hoc networks is discussed. A new parameter-the pause probability of the random waypoint mobility model (RWP) which is the deterministic parameter of the effect of mobility on the critical transmitting and reflects the stationary trend of the network is defined. And the function of the relationship of the pause probability to the minimum velocity, the maximum velocity and the pause time of RWP is derived. Simulation results show that mobility affects the critical transmitting range by pause probability. If pause probability is smaller than 0. 5, the critical transmitting range of mobile networks is 10% larger than that of stationary networks, or it equals that of a stationary one approximately.
出处
《西安电子科技大学学报》
EI
CAS
CSCD
北大核心
2005年第6期881-884,共4页
Journal of Xidian University
基金
国家自然科学基金和微软亚洲研究院联合资助项目(60372048)
高等学校优秀青年教师教学科研奖励计划(TRAPOYT)
国家自然科学基金重大项目(60496316)
国家"863"课题<认知无线电技术研究>(2005AA123910)
教育部科学技术研究重点项目(104171)
关键词
无线AD
HOC网络
连通性
随机路点运动
临界传输半径
wireless Ad Hoc networks
connectivity
random waypoint mobility
critical transmitting range