Study on the Co-Existence of 20ms TTI and 5ms TTI in e-DCH of TD-SCDMA HSUPA

The wireless link with fixed parameters is subject to time-varying channel, and the battery energy is limited in mobile terminals. Thus, the authors consider the co-existence of 20msTTI and 5ms 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, they 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: 20ms and 5msTTI should co-exist in TD-SCDMA HSUPA, and be adopted respectively in different channel condition to save the terminal power.