Abstract: A method for detecting a hand-off target frequency of an MS in a CDMA communication system, comprising the steps of transmitting a pilot strength measurement message (PSMM) from the MS through at least one BTS to a BSC; causing the BSC to determine based on the PSMM whether the MS is located in a border of a BTS or whether the forward radio communication channel of the MS is in bad state; causing the BSC to command the MS to detect the hand-off target frequency when the MS is located in the border or when forward radio communication channel is in bad state; causing the MS to report the detection result of the BTS supporting the hand-off target frequency to the BSC; causing the BSC to perform the inter-frequency hand-off based on the detection report from the MS; causing the BSC to check whether the MS detecting the hand-off target frequency meets the requirement of stopping the detection of the hand-off target frequency; causing the BSC to command the MS to stop the detection when meeting the requirement; and

Abstract: A method for determining the execution time and handoff direction of a hard handoff by a base station controller in a code division multiple access (CDMA) system. The execution time and handoff direction is determined for a mobile station moving between two base station transceiver having different frequency allocations (Fas). The service region of the CDMA system is divided as individual cells where each cell further comprises one or more sectors (sub-cells). Sub-cells are either common frequency sub-cells or border frequency sub-cells. Common frequency sub-cells are defined as those sub-cells for which the common frequencies of the neighboring sub-cells are all in use. Correspondingly, a border frequency sub-cells defines a sub-cell for which the common frequencies of the neighboring sub-cells are not all in use.