Patent ID: 7764661
Filing Date: 2010-07-27
Classification: H04L

Abstract:
1. A method of transmitting data by an User Equipment in a communication system, the method comprising the steps of: receiving, by the User Equipment, a Transmit Time Interval (TTI) change signal for requesting a TTI change through an upper signaling; comparing, by the User Equipment, a current TTI and a previous TTI in response to receiving the TTI change signal; determining a future TTI for changing the current TTI; changing, by the User Equipment, the current TTI at a time point of a first TTI change when the TTI change signal is received, according to a first TTI change mode determined when the future TTI is shorter than the previous TTI; changing, by the User Equipment, the current TTI at a time point of a second TTI change calculated by the TTI change signal and a completion time point of a Hybrid Automatic Repeat Request (HARQ) process in the previous TTI, according to a second TTI change mode determined when the future TTI is longer than the previous TTI; and transmitting data using new HARQ processes according to a changed TTI at the time point of one of the first TTI change and the second TTI change.