在通信领域，无线通信在人们的生活中扮演着越来越重要的角色，宽带无线接入技术作为其中的重要组成部分也有着广泛的应用前景和巨大的发展潜力。IEEE 802.16技术是一种定位于无线城域网的宽带无线接入技术，用来解决“最后1公里”的通信要求。它可以为用户提供范围更广，速率更高的宽带无线接入，在基础设施不到位地方，这种无线接入方式就显得更加灵活。由于IEEE 802.16在技术上有很多优势因而得到人们的广泛关注，成为宽带无线领域的一个研究热点。 本文重点研究IEEE 802.16d的业务调度方案。IEEE 802.16d接口技术由物理层(PHY)和媒体接入控制层(MAC)组成。本文首先对MAC层，尤其是MAC公共部分子层，进行了分析，然后从业务流管理和QoS保证两方面研究了MAC层QoS机制，针对已有QoS架构的不足，提出了改进的跨层QoS架构；业务调度算法是实现QoS保证的关键之一，本文重点研究并比较了有线和无线网络中常见的调度算法，然后针对经典RR算法和MAX C/I算法的缺点，在系统吞吐量与公平性之间折中，提出了改进的MAX C/I算法，并提出了适合802.16d MAC层的基于改进的MAX C/I算法上行链路分级调度方案，即在满足不同业务QoS要求的同时，兼顾公平性和系统吞吐量；最后搭建了OPNET仿真平台对改进的MAX C/I算法和分级调度方案进行性能仿真与分析，结果表明：该方案在满足不同业务QoS要求的同时，能够改善各用户之间的公平性并提高系统吞吐量。

With wireless communication playing more and more important role, BWA has extensive applied foreground and huge development potential as an important part of wireless communication. IEEE 802.16d, which is a kind of BWA technology used in WMAN, is used for resolving “the last one kilometre”communication requirement. It can provide more wide area and higher rate and will be more flexible especially in area where there is lack of basic infrastructure. So it has received much attention from people and become a research hotspot. The paper mainly researches on service scheduling scheme for IEEE 802.16d. 802.16d air interface is composed of PHY and MAC layer. Firstly, MAC protocol is analyzed, especially the MAC CPS. Secondly, the paper researches the QoS mechanism of MAC from two sides, the management of service flow and QoS guarantee. The improved layer-crossing QoS framework is proposed for shortcomings of the existing QoS framework. Service scheduling algorithms are one of the key parts to realize QoS. The paper mainly studies and compares the generic scheduling algorithms used in wired and wireless network. Aiming at the shortcomings of classical RR and MAX C/I algorithms, the advanced MAX C/I algorithm is proposed to get the balance of fairness and throughput, and then an class-based uplink service scheduling scheme is designed for IEEE 802.16d MAC, which considers both the QoS of every service and fairness and system throughput. Finally, the OPNET simulation platform is constructed to evaluate the performance of the modified MAX C/I and the class-based scheduling scheme. The simulation results show that the scheme satisfies the QoS requirement of every service and improves the fairness of the users and system throughput.