多射频多信道Ad Hoc网络跨层功率分配

为了提高多射频多信道Ad Hoc网络容量，降低网络间无线干扰，提出从跨层优化综合考虑信道与功率联合分配问题，将信道与功率分配问题转化为混合整数非线性规划模型，针对模型设计两阶段子问题求解迭代算法。算法在第一阶段采用启发式算法分配信道，在第二阶段采用分布式算法进行功率分配。仿真实验结果表明,信道与功率联合分配相对于固定信道下功率分配具有更好的效果，联合优化两阶段迭代算法可有效提高网络整体效用，同时降低节点间相互干扰。

Cross-layer power allocation for multi-radio multi-channel Ad Hoc network

To enhance the capacity of multi radio multi channel Ad Hoc networks and decrease radio interference, an iterative algorithm is put forward to solve the two stage sub problem in designing the model which translates channel assignment and power allocation into the mixed integer nonlinear optimization from the view of cross layer design. At the first stage a heuristic algorithm is applied to assign channel while a distributed algorithm is applied to allocate power at the second stage. Simulation results indicate that compared with the classic fixed channel power allocation algorithm, the new algorithm can improve the network utility whereas decrease the radio interference significantly.