面向链接的资源分配与QoS保障联合跨层算法  

Connection-based joint resource allocation and QoS scheduling: a cross-layer design approach

作　　者：陈杰[1] 赵民建[1] 李式巨[1] 

机构地区：[1]浙江大学信息与电子工程学系,浙江杭州310027

出　　处：《浙江大学学报（工学版）》2008年第10期1739-1744,共6页Journal of Zhejiang University：Engineering Science

基　　金：国家"863"高技术研究发展计划资助项目(2006AA01Z273)

摘　　要：为了在无线蜂窝网络中向各物理链路上具有不同速率以及延时要求的多条数据链接提供最优化的资源分配以及服务质量(QoS)保障,设计了一种面向链接的资源分配与QoS保障联合算法.基于跨层设计思想,将目标建模为接入控制、速率分配以及资源分配3个子问题.来自物理层的信道状态信息、来自媒体接入控制(MAC)层的队列状态信息、来自应用层的速率及延时请求信息在系统模型中得到了综合的考虑.子问题可以分别通过贪婪算法及凸规划算法顺序地进行求解,从而得出每条数据链接上最优的资源及功率分配值,而这些结果将通过特定的接口反馈到各个层次模块中去.仿真结果表明,该算法能够解决模型面临的问题,并且比层次式协议栈中的算法更加有效地利用了网络资源.Providing optimal resource allocation and quality of service （QoS） guarantee for data connections with different data rates and delay requirements on various physical links in wireless cellular network is important. To achieve the objective, an access control problem, a rate allocation problem and a resource allocation problem were modeled based on cross-layer design. The channel status from the physical layer, the queuing status from the media access control （MAC） layer and the rate and delay requirements from the application layer were considered. The problems were sequentially solved by greedy algorithm and convex optimization algorithm and the optimum resource and power allocation results on each connection were obtained. Then the results were passed to different layers by specific interfaces. Simulation results show that the algorithm can solve the initial problem and use network resources more effectively than layered approaches.

关 键 词：跨层设计 服务质量 面向链接 无线蜂窝网络 

分 类 号：TN929.53[电子电信—通信与信息系统]