多速率IEEE802.11 Ad Hoc网络协议栈跨层优化

采用凸优化理论研究了Ad Hoc网络协议栈跨层优化问题.以多速率IEEE802.11Ad Hoc网络协议栈优化为例,建立其网络协议层系统模型,定义了Ad Hoc网络效用函数和性能参数约束条件,采用拉格朗日对偶分解法对该模型进行跨层分解,并运用梯度投影法获得优化问题的最优解或次优解,实现了物理层、MAC层及网络层在路由、功率分配和传输调度几方面的联合优化.数值仿真与计算结果验证了该算法的有效性和正确性.

Cross-Layer Optimization of Ad Hoc Networks Protocol Stack With Multi-rate IEEE802.11

In terms of the theory of convex optimization,cross layer optimization problem in Ad Hoc network protocol stack is investigated in this paper.By taking an example of optimization of the Ad Hoc networks protocol stack with multi-rate IEEE802.11,the system model of its network protocol layer is set up,the utility function and performance parameters constraint conditions of the Ad Hoc networks is defined,the cross-layer decomposition of the model is performed by using Lagrangian dual decomposition method,and the optimal and/or sub-optimal solu-tions of optimization problems are obtained by applying the Gradient projection method,realizing the joint-optimi-zation in the aspects of routing,power distribution and transmission scheduling for physical layer,MAC layer and network layer.Numerical simulation and its results prove that this proposed algorithm is of availability.