分析HSDPA的关键技术,侧重HSDPA中分组调度算法的原理和相应的应用类别。针对3种经典的分组调度算法——轮循调度算法、最大C/I调度算法和正比公平调度算法,研究其原理、所适用的应用范围及对系统吞吐量和公平性等方面的影响。通过分析对这三种算法的性能进行比较,得出各自优缺点的结论。 HSDPA analysis of key technologies, focusing on HSDPA packet scheduling algorithm in the principle and the corresponding application categories. Aiming at the three classic packet scheduling algorithms - round robin scheduling algorithm, maximum C / I scheduling algorithm and proportional fair scheduling algorithm, the paper studies its principle, the applicable scope and the impact on system throughput and fairness. By analyzing the performance of these three algorithms are compared to draw their own advantages and disadvantages of the conclusion.