摘要: |
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。 |
关键词: 无线通信 TD-LTE 上下行配置 包时延 吞吐量 |
DOI: |
|
基金项目:国家科技重大专项资助项目 (2010ZX03002-003) |
|
Comparison of Different UL-DL Configurations of TD-LTE |
LV Xing-zai,CHEN Zheng,SHI Dan,JIANG Zhi-ning |
(AlcatelLucent Shanghai Bell Co., Ltd., Shanghai 201206,China) |
Abstract: |
TD-LTE(Time DuplexLong Term Evolution) is the next generation of w
ireless communication standard, on which China has independent kernel intellectu
al property rights. It defines 7 different UL-DL(UplinkDownlink) configuration
s
to flexibly support different traffic requirements in uplink and downlink. By s
tudying 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 throughpu
t and spectral efficiency of different UL-DL configurations are also proposed by
analysing the configuration of channel quality feedback, sounding reference sig
nal transmission and hybrid transmission of different UL-DL configurations.The a
nalysis result is verified by syst
em level simulation and the actual delay, th
roughput and spectral efficiency of different UL-DL configurations are given, wh
ich provid
es a reference for the selection of UL-DL configuration under specific traffic
and networking requirements. |
Key words: wireless communication TD-LTE UL-DL configuration packet delay throughput |