基于CSMA/CA机制,提出了一个改进的功率控制算法,用于解决传统的bASIC方案中,由于功率控制的引入而产生的非对称链路对节点传输的碰撞问题,它通过简单地修改802.11MAC层协议,采用变长的rTS/CTS来使载波侦听环中的节点获得关于dATA/ACk传输的分组大小及功率强度信息,从而有效地避免碰撞与重传。仿真结果说明,该方法不仅可以节省能量,而且可以提高网络性能。Based on CSMA/CA scheme,an improved power control algorithm was proposed to solve the Asymmetric Link Problem introduced by power control of BASIC in Ad Hoc networks,which modified 802.11 MAC protocol by using variable size of RTS/CTS to gain the information of data size and power level in the area of carrier sense ring to avoid more collisions and retransmissions.Simulation result shows that the approach can not only save network energy,but also improve network performance.福建省青年创新基金资助项目(2006F3097);福建省自然科学基金资助项目(A0710022);集美大学优秀青年骨干教师基金资助项目(2008B002
