Patent ID: 7349714
Filing Date: 2008-03-25
Classification: H04W

Abstract:
1. A method for controlling power of a second channel in a state where a base station controller (BSC) hands-off a mobile station receiving packet data over the second channel from a first base station system (BSS) to a second BSS, in a system in which the mobile station communicates with the first BSS and the second BSS adjacent to the first BSS through a first channel for transmitting a control message, and the mobile station communicates with the first BSS through the second channel for transmitting the packet data, the method comprising the steps of: detecting power control information of the first channel, transmitted from the mobile station; calculating transmission power SCH_power (supplemental channel power) of the second channel by adding a sum of a power value power_offset (power offset) and a power control step value pc_step (power control step) to transmission power FDCH_power (fundamental channel dedicated control channel power) of the first channel when the detected power control information of the first channel is a power-up command; calculating transmission power SCH_power of the second channel by subtracting the power control step value pc_step from the sum of the power value power_offset and transmission power FDCH_power of the first channel when the detected power control information of the first channel is a power-down command; and controlling a signal on the second channel according to the calculated transmission power SCH_power.