【摘要】 本文基于凸优化方法,以提升网络效用与降低网络总功耗为目标,针对多无线多信道(Muhi-radio Multi-channel)的多跳无线网络提出了一种联合速率控制与功率分配的跨层优化模型,并利用对偶分解方法设计了优化模型对应的分布式算法,证明了该分布式算法收敛性.该算法通过改变本征权的取值能够在网络效用与网络功耗之间取得折衷,并能根据速率要求动态调整各条链路的注入速率与发射功率使得网络达到效用与功耗的联合最优.通过仿真实验验证了该分布式算法可有效的调节网络效用与总功耗之间的平衡.更多还原

【Abstract】 Based on the convex optimization, a cross-layer optimization model for jointly rate control and power allocation in multi-radio multi-channel multi-hop wireless networks was proposed. By dual decomposition technique,the distributed algorithm for the proposed optimization model was designed, followed by the proof of convergence. The proposed algorithm attains the trade-off between the network utility and the total power by varying the intrinsic weight, and dynamically adjusts the injected rate and trans-mitting power to achieve the joint optimization of the network utility and power. Simulation results show that the proposed algorithm can effectively regulate the network utility and the total consumed power.更多还原