TD-LTE各种上下行配置的性能比较

Comparison of Different UL-DL Configurations of TD-LTE

TD-LTE是我国拥有核心自主知识产权的下一代无线通信技术标准,共有7种不同的上下行配置,以灵活支持不同的上下行业务需求。通过研究不同上下行配置对应的各种时序,得出不同上下行配置对上下行时延的影响。通过分析在不同上下行配置下信道质量反馈、上行探测信号、混合自适应重传等技术的配置,研究了不同上下行配置对上下行吞吐量及频谱效率的影响。同时利用系统仿真验证了以上分析结果,给出了不同上下行配置性能下时延、吞吐量、频谱效率性能。研究结果为不同业务和组网要求下上下行配置的选择提供了参考依据。

TD- LTE（Time Duplex-Long Term Evolution） is the next generation of wireless communication standard, on which China has independent kernel intellectual property rights. It defines 7 different UL- DL（Uplink-Downlink） configurations to flexibly support different traffic requirements in uplink and downlink. By studying the timing of different UL - DL configurations, the impact of different UL - DL configurations on the UL and DL delay is given. The impacts on the throughput and spectral efficiency of different UL - DL configurations are also proposed by analysing the configuration of channel quality feedback, sounding reference signal transmission and hybrid transmission of different UL - DL configurations. The analysis result is verified by system level simulation and the actual delay, throughput and spectral efficiency of different UL - DL configurations are given, which provides a reference for the selection of UL- DL configuration under specific traffic and networking requirements.