INTRA-CELL INTER-FREQUENCY HARD HANDOFF METHOD IN A CDMA CELLULAR SYSTEM

A method for processing a hard handoff between a moving mobile station and base stations in a code division multiple access is disclosed. In accordance with a preferred embodiment of the present invention, the method of intra-cell-inter-frequency hard handoff includes the steps of setting up a new call, confirming whether a current base station satisfies a condition of inter-frequency hard handoff and whether a currently used frequency in the base station satisfies a condition of inter-frequency hard handoff, and performing a general handoff and call processing, when both the conditions of the two confirming steps are not satisfied. If both conditions of the two confirming steps are satisfied, an output signal strength threshold value on and a distance threshold value are set. The mobile station is instructed to periodically report the base station's output signal strength. The distance between the base station and the mobile station is established and when the base station's output signal strength is less than the set threshold value hard handoff is commanded. However, if it is not less, the base station to mobile station distance is checked with respect to the set distance threshold value. On the contrary, in the event that the base station-mobile station distance is less than the set threshold value, the method returns to the step of estimating the distance between the base station and the mobile station and continues to check the output signal strength of the base station and distance between base station and mobile station.