针对不确定流量的多收发机无线网络资源优化研究  

Resource Optimization for Uncertain Traffic in Multi-radio Wireless Networks

作　　者：徐晶[1] 刘威[1] 杨宗凯[2] 

机构地区：[1]华中科技大学电子与信息工程系,武汉430074 [2]华中师范大学,武汉430079

出　　处：《计算机科学》2012年第3期33-38,共6页Computer Science

基　　金：国家自然科学基金项目(60772088)资助

摘　　要：多收发机无线网络具有多接口多信道多跳的特点,是今后无线网络发展的趋势。该网络中信道与链路的资源分配,涉及路由、信道分配以及链路调度的联合优化。在以往的研究中通常对网络流量模型进行简化,假设其是确定且相对稳定的。考虑到实际网络中流量不确定性的特征,以网络吞吐量最大化为目标,提出传输流约束、信道资源约束以及干扰约束条件下的资源分配联合优化模型,以及基于不确定流量条件下资源分配最优解的链路调度策略。仿真实验结果证明所提出的路由、信道分配及链路调度方案能够更好地适应变化的网络流量需求。Multi-radio wireless network is one of the trends for future wireless network,which has the characteristics of multiple interfaces, multiple channels and multiple hop. The channels and links resource optimization in such network is a joint optimization problem of routing, channel allocation and link scheduling. In the existed related approaches, the net- work traffic is simply assumed to be determ/nistic and stable. However, it is known that there is always some uncertain- ty in real network traffic. In this paper, one joint optimization model for network throughput maximization was proposed under the constraints of transmission flows, eharmels and interferences. With the optimal solution with uncertain input traffic, one link schedule scheme was also proposed. Numeric simulation results show that our solution has better performance for uncertain traffic demand.

关 键 词：多接口多信道 路由 信道分配 链路调度 优化 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]