Title :
Study on the Co-Existence of 20ms TTI and 5ms TTI in E-DCH of TD-SCDMA HSUPA
Author :
Li Mingke ; Wang Kai ; Zhang Jing ; Wang Yafeng ; Yang Dacheng
Author_Institution :
Beijing Univ. of Posts & Telecommun., Beijing
Abstract :
The wireless link with fixed parameters is subject to time-varying channel, and the battery energy is limited in mobile terminals. Thus we consider the co-existence of 20 msTTI and 5 ms TTI in E-DCH of TD-SCDMA HSUPA. In this paper, based on the comparative study on the link performances with different TTI and the analysis on the link simulation results, we discuss the different TTI´s influence on the terminal power consumption. Furthermore, the system level performances of semi-static TTI and traditional single TTI configurations are compared. Finally the conclusions are drawn: 20 ms and 5 msTTI should co-exist in TD-SCDMA HSUPA, and be adopted respectively in different channel condition to save the terminal power. The data throughput of semi-static TTI configuration is greater than those of both single TTI configurations, and the semi-static TTI selection between 20 ms and 5 ms is implemented according to the moving speed of a specific UE.
Keywords :
code division multiple access; radio links; telecommunication terminals; time division multiple access; time-varying channels; TD-SCDMA HSUPA; battery energy; link performances; mobile terminals; system level performances; terminal power consumption; time-varying channel; wireless link; Analytical models; Delay effects; Downlink; Energy consumption; Fading; Multiaccess communication; Performance analysis; Throughput; Time division synchronous code division multiple access; Time-varying channels;
Conference_Titel :
Vehicular Technology Conference, 2007. VTC-2007 Fall. 2007 IEEE 66th
Conference_Location :
Baltimore, MD
Print_ISBN :
978-1-4244-0263-2
Electronic_ISBN :
1090-3038
DOI :
10.1109/VETECF.2007.52
