摘要
针对移动自组网中的通信冲突和能源受限问题,提出了基于功率控制的空分复用优化方法。定量描述空间复用率的大小,并分析如何选择传输半径、设定接收功率,以减小隐藏终端和暴露终端对通信的不利影响。对MAC层进行改进,通过接收数据包的强度设置帧控制字段,进行自适应发送功率调节,将信号接收功率控制在合适区间。在NS-2下进行的仿真实验,实验结果表明了该方法在空间复用率提升和节能上的有效性。
Aiming at the problem of communication collision and energy limitation in MANET, a spatial reuse optimization method based on transmit power adjustment is proposed. The spatial reuse factor is calculated, and how to choose transmit radius is analyzed and reception power is set to minimize the adverse effects brought by hidden terminal and exposed terminal, then the MAC layer is modified by setting frame control field according to reception signal strength and adaptively adjusting transmit power to keep the reception power of MANET node in the appropriate bound. By emulation experiment in NS-2, the availability of the method for spatial reuse optimization and energy saving is studied.
出处
《计算机工程与设计》
CSCD
北大核心
2009年第2期301-303,共3页
Computer Engineering and Design
基金
国家自然科学基金项目(60502028)
武汉科技大学大学生创新基金项目(2007142)
