一种基于OFDM的具有QoS保证的无线IP分组调度算法  

A Novel Wireless IP Packets Scheduling Algorithm with QoS Guaranteeing Based on OFDM System

作　　者：俞一帆[1] 纪红[1] 乐光新[1] 

机构地区：[1]北京邮电大学电信工程学院,北京100876

出　　处：《北京邮电大学学报》2006年第3期61-65,共5页Journal of Beijing University of Posts and Telecommunications

基　　金：国家"863计划"项目(2003AA12331004);国家自然科学基金项目(60472070)

摘　　要：根据无线正交频分复用(OFDM)系统的多载波并行传输特性及多用户无线通信系统的特点,利用跨层交互算法,提出了1种适用于IP分组业务的无线多业务分组调度算法(AS-OFDM).该算法通过在系统的网络层、链路层及物理层之间传递系统信息,实现了无线资源的自适应分配和IP分组的自适应调度.仿真试验表明,同传统的IP调度算法相比,该调度算法在保证不同业务的服务质量(QoS)的条件下,能够实现对无线资源更为有效的利用和保证并具有相同业务需求的不同用户之间的公平性.According to the properties of parallel data transmission of OFDM （Orthogonal Frequency Division Multiplexing） and the features of multiuser communications in wireless networks, one novel wireless IP packets scheduling algorithm for multiservice in OFDM system （AS-OFDM） is presented by using the algorithm of cross-layer design. The proposed algorithm implements the radio resource management and adaptive packets scheduling via exchanging the information among the network layer, link layer and physical layer. The simulation results show that the proposed algorithm can make use of the radio resource and guarantee the fairness among the users more efficiently than the traditional IP packets scheduling algorithm under the condition that the quality of service（QoS） of different service has to be guaranteed.

关 键 词：无线IP 服务质量 调度 正交频分复用 跨层设计 

分 类 号：TN915.2[电子电信—通信与信息系统]