基于MANET环境下的小波分形插值的QoS控制方法

QoS control of video transmission in MANET based on wavelet fractal interpolation

移动无线自组网络,通过多跳接入Internet,卫星网和第三代移动系统,构成了下一代无线Ad-hoc互联网,实现了异构网络的融合和资源共享.在下一代移动无线网络环境下,带宽和功率受限,存在着各种传输误差.根据这些特性,本文采用基于方向的小波分形的插值算法,提出了一种适用于移动无线Ad-hoc网络的视频传输的服务质量(Quality of Service,简称QoS)控制方法,模拟结果表明,该算法与现存算法(双线性内插)相比,具有更优的性能(信噪比),并能适应网络带宽的动态变化.

Mobile wireless Ad Hoc networks （MANET） interconnect with Internet, satellite and the third generation mobile communication system by multi-hop, and they form the next generation of Ad Hoc network, which performs the merging and resources sharing in heterogeneous networks. The bandwidth and power are limited and there are all kinds of transmission errors in the environment of MANET. According to these characteristics of the next generation of MANET, we propose a QoS control method for video transmission, based on direction-selective fractal interpolating. The＇ simulated result shows that this new method has better performance than existing algorithms （such as bilinear interpolation）, and can be adapted to the dynamic change of bandwidth.