Patent ID: 6597922
Filing Date: 2003-07-22
Classification: H04W

Abstract:
In a radiotelephone system including a mobile station and a first and second external stations which utilizes redundant data transmission, a method of controlling transmit power for improving receiver performance by ensuring sufficient transmit power during a candidate frequency search while conducting a handoff between cells comprising the steps of repeatedly:a) forming a signal for transmission with interleaved redundant information (voice or data) to a mobile station from said first external station on a first frequency at a first set power level; b) transmitting the signal to a mobile station from said first external station on the first frequency at a second power level above the first set power level by a predetermined amount during a predetermined time that the mobile station is tuned to the first frequency prior to tuning to the second frequency; and c)transmitting information to the mobile station on a second frequency from said second external base station, the mobile station having tuned from the first frequency to the second frequency.