Ad Hoc中基于效用最大的优先级流控机制  

An Priority-Based Flow Control Scheme with Utility Maximization in the Ad Hoc

作　　者：许航天[1] 丁炜[1] 

机构地区：[1]北京邮电大学通信网络综合技术研究所,北京100876

出　　处：《微电子学与计算机》2008年第1期80-84,共5页Microelectronics & Computer

基　　金：国家自然科学基金项目(60372101)

摘　　要：针对AdHoc中流竞争,提出了一种分布式节点的最优化速率控制机制。给出了基于流优先级的效用函数。以最大化网络整体效用为目标,通过运用对偶理论和梯度投影算法,给出了每一端到端流获得最优值的迭代机制,它能够保证高优先级流的QoS。仿真结果表明该机制可以使网络资源根据流优先级进行有效分配,并且具有很好的收敛性。An optimal distributed rate oontrol scheme is presented which is for the flow contention in the Ad Hoc network. In this paper,we define the flow utility based on the flow priority. In order to maximize the whole net utility, the end-to-end optimal flow rate can achieve through iterative scheme using duality theory and gradient projection algorithm. At the same time, the QoS of flow with high priority can be guaranteed. Simulation results show that the new scheme can effectively allocate the resource by flow priority and have good oonvergence performance.

关 键 词：AD HOC 优先级 效用 最大圈 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]