Samsung Electronics Co., Ltd.

In-Bum Chang

Chan-Byoung Chae

Ki-Ho Cho

A mobile station that determines whether to perform a soft handover in a CDMA mobile communication system and method thereof. The mobile station compares strength of a signal received from a source BTS (Base Transceiver Station) with a prescribed reference value. If the strength of the signal received from the source BTS is larger than the reference value, the mobile station determines whether to perform a soft handover based on a new offset value being smaller than a previous hysteresis no matter how strong a signal received from a target BTS is.

Apparatus and method for determining a soft handover in a CDMA mobile communication system

An outer loop power control apparatus and method in a mobile communication system are disclosed. If a first received frame has no errors and the raw BER of the first received frame is equal to or greater than a predetermined raw BER, a power control mode is changed to an adjustment mode. If a second received frame following the first received frame has no errors and the raw BER of the second received frame is less than the threshold raw BER in the adjustment mode, a target Eb/No is decreased by a product of a first step coefficient and a decrement unit. If the raw BER of the second received frame is equal to or greater than the threshold raw BER, the raw BERs of the first and second received frames are compared. If the raw BER of the second received frame is less than the raw BER of the first received frame, the target Eb/No is decreased by a product of a second step coefficient and the decrement unit.

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Songnam-shi, South Korea

In-Bum Chang