초록 ▼

In the preferred embodiment, the transmission length of the non-full rate frame is shortened frame in order for the mobile terminal 100 to monitor other frequencies with a single receiver. Modulated symbols of non-full rate frame are transmitted with reduced repetition maintaining the sum of repeate

In the preferred embodiment, the transmission length of the non-full rate frame is shortened frame in order for the mobile terminal 100 to monitor other frequencies with a single receiver. Modulated symbols of non-full rate frame are transmitted with reduced repetition maintaining the sum of repeated symbol energy. Generally, for 1/n (n=2,4,8) length transmission, 1/m (m≥n) rate frame repeated m/n times and transmitted with n/m symbol energy of the full rate frame. The system may use rate limitation to generate a non-full rate frame. A position of the transmitted symbols may be randomized by a mobile specific predetermined random code to minimize interference between terminals different from each other. For intensive frequency scanning and synchronization signal transmission, non-transmitting period can be assigned for successive frames of some interval. For 1/n (n=2,4,8) length successive transmission, the starting position of the transmitted symbols are staggered by 1/n frame time in each frame. If there is no part of the frame to be staggered, the starting position is the beginning of the frame. Such implementation minimizes guard time overhead for frequency switching and resynchronization.

대표청구항 ▼

1. A method of performing a handoff in a telephone system, comprising:modulating data of a non-full rate frame having at least one repeated symbol by a first base station at a prescribed energy transmission level; reducing the number of repeated symbols while maintaining the prescribed energy transm

1. A method of performing a handoff in a telephone system, comprising:modulating data of a non-full rate frame having at least one repeated symbol by a first base station at a prescribed energy transmission level; reducing the number of repeated symbols while maintaining the prescribed energy transmission level by the first base station to generate a searching period; and searching frequency information of at least one second base station by a mobile terminal during the searching period to perform a handoff.