RSMA control device and method for mobile communication system

A method for controlling transmission power of a reverse common channel in a mobile station, in which after being assigned the reverse common channel, the mobile station controls power of a transmission signal on the reverse common channel, the method comprising the steps of:

• transmitting the transmission signal at a given transmission power;
• decreasing power of the transmission signal in response to a power-down command from a base station;
• measuring a strength of a power command signal from a base station;
• comparing the strength of the power command signal with a predetermined value;
• and
• releasing the transmission signal when the strength of the power command signal is equal to or less than the predetermined value.

A method for controlling transmission power of a reverse common channel in a CDMA communication system upon failure to acquire a signal transmitted over the reverse common channel, the method comprising the steps of:

• generating, at the base station, a power-up command for the signal for a first predetermined time;
• transmitting, at the mobile station, the signal at a given transmission power according to the power-up command;
• generating, at the base station, a power-down command for the signal for a second predetermined time upon failure to acquire the signal for the first predetermined time;
• decreasing, at the mobile station, the signal power in response to the power-down command;
• measuring, at the mobile station, a strength of a power command signal from a base station;
• comparing, at the mobile station, the strength of the power command signal with a predetermined value;
• and
• releasing the signal when the strength of the power command signal is equal to or less than the predetermined value.