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首先阐述了TD-LTE系统中资源调度技术的重要性,介绍了资源调度技术中信道质量指示CQI信号的定义、反馈机制、以及周期性与非周期性CQI反馈区别。然后在实际TD-LTE系统环境中对CQI信号进行测试,并对结果做了简单的比较分析。最后详细比较了FD-LTE、HSDPA和TD-LTE系统中CQI的运作机制,总结得出TD-LTE系统在资源调度技术上具有高频率利用率、支持非对称业务、获得高吞吐速率以及节省上行信道资源等优势。
Firstly, the importance of resource scheduling in TD-LTE system is expounded. The definition, feedback mechanism of channel quality indicator (CQI) signal in resource scheduling and the difference between periodic and aperiodic CQI feedback are introduced. Then the CQI signal is tested in the actual TD-LTE system environment, and the results are compared and analyzed briefly. Finally, the operating mechanism of CQI in FD-LTE, HSDPA and TD-LTE systems is compared in detail. The conclusion is drawn that TD-LTE system has high frequency utilization rate in resource scheduling technology, asymmetric service, high throughput rate and uplink saving Channel resources and other advantages.