摘要： 提出一种联合拥塞和信道接入控制的跨层优化方法，以降低多播流的分发时延，建立网络效用最大化模型，采用基于效用的定价机制，通过拉格朗日对偶分解获得基于价格的分布式算法，并以该算法为核心进行链路的信道接入竞争控制和拥塞控制。仿真实验结果表明，该算法是可行的。

关键词: 无线Mesh网络, 多播, 拥塞控制, 竞争控制

Abstract: A method for cross-layer optimization by joining congestion control and contention control is proposed, which aims to cut down the time delay of multicast streaming. The network utility maximization model is set up, and by using pricing mechanism based on effect, the distributed algorithm based on price is obtained with technique of Lagrange dual decomposition. The congestion and contention controls are carried out by using this algorithm. Simulation experimental results show it is feasible.

Key words: Wireless Mesh Networks(WMNs), multicast, congestion control, contention control

中图分类号: 

• TN393