Patent ID: 6934526
Filing Date: 2005-08-23
Classification: H04B

Abstract:
1. A method for switching an operation mode from a non-USTS (Uplink Synchronous Transmission Scheme) to a USTS mode in a Node B capable of communicating with a UE (User Equipment) in both the non-USTS mode and the USTS mode, comprising the steps of: calculating a difference value between a start point of a downlink dedicated channel frame in a downlink dedicated channel transmitted to the UE in the non-USTS mode and a start point of an uplink dedicated channel frame in an uplink dedicated channel received from the UE; determining a first control value for controlling the start point of the uplink dedicated channel frame in the uplink dedicated channel from the UE by comparing the difference value with a given reference value; determining a second control value such that the second control value for the start point of the downlink dedicated channel frame in the downlink dedicated channel of the Node B becomes a multiple of a given number of chips; informing the UE of the determined first and second control values; and transmitting a downlink dedicated channel signal such that the start point of the downlink dedicated channel frame becomes a start point determined based on the second control value.