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中文摘要：
针对未来无线通信系统必须能够同时支持多种业务类型的用户的问题，按照各用户服务质量（QoS）需求的不同将用户分为具有不同优先级的类，并基于子载波与功率分配联合优化的思想，提出了一种下行多用户OFDM系统动态资源分配方法。仿真结果表明，与现有方法相比，该方法在首先满足具有较高优先级用户的QoS需求的情况下，将更多的资源分配给优先级相对较低的用户，从而提高了资源利用率，进一步增加了系统的整体速率。
英文摘要：
In consideration of the problem that future wireless communication longing to different services, a dynamic resource allocation method was systems must simultaneously support the users befor downlink multi-user orthogonal frequency division multiplexing （OFDM） systems, where users were divided into several classes with different priorities according to their quality of service （QoS） requirements. And this resource allocation strategy was carried out based on the joint optimization of subcarriers assignment and power allocation. The simulation results demonstrate that, compared with the existing methods, the proposed scheme allocates much more resources to users with lower priorities while guarantee the QoS of users with higher priorities, and thus it improves resource efficiency and increases overall data rate correspondingly.
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