Method and system for controlling a pilot measurement request order (pmro)

Abstract

A method and a system are disclosed for controlling a pilot measurement request order for a soft swap handoff in a code division multiple access system. A preferred embodiment of the present invention comprises the steps of perceiving by a mobile station which is currently in communication with a first base transceiver station (BTS) a pilot signal strength which is above a predetermined threshold value, wherein the pilot signal is from a second BTS which is not currently in communication with the mobile station, reporting pilot signal strengths of the first BTS and of the second BTS through a pilot strength measurement message (PSMM) from the mobile station to a base station controller (BSC) if the mobile station perceives a pilot signal strength which is above a predetermined threshold value, informing the mobile station of reception of PSMM in order to prevent the mobile station from reporting unnecessary PSMM, checking whether the second BTS is corresponding to neighboring BTSs of the first BTS, ordering the mobile station to perform handoff, if the second BTS is corresponding to neighboring BTS, transmitting a pilot measurement request order (PMRO) from the BSC to the mobile station if the second BTS is not corresponding to neighboring BTS and reporting the strengths of all pilot signal receivable from BTSs through a pilot strength measurement message (PSMM) to the BSC after the mobile station waits for a predetermined action time upon reception of the PMRO.