Method and system for providing inter-frequency handoff in a telephone system

A method for providing a handoff in a telephone system comprising:

• modulating data of a non-full rate frame into a modulated frame having a repeated frame period by varying an energy level based on a full rate frame;
• forming a non-transmitting period within the modulated frame by reducing a number of repeated symbols while maintaining the energy level of the frame;
• and
• searching frequency information of a peripheral base station with the transmission frame to perform a handoff and transmitting the searched information to a transmitter of a base station, wherein the number of repetitions includes a partial number of repetitions.

A method for providing a handoff in a telephone system, comprising:

• forming a non-transmitting period in a non-full rate transmission frame by controlling a number of repetitions of a transmission symbol in the frame and at least one of a position and form of a transmitting period with a variable rate characteristic of the transmission frame;
• controlling an energy level of the transmission symbol by an inverse proportion of the number of repetitions such that a frame energy of the transmission frame is maintained;
• searching a base station signal of a different frequency during the non-transmitting period;
• and
• transmitting a signal to the base station of the different frequency, by a mobile terminal, wherein the number of repetitions includes a partial number of repetitions.

A method of performing a handoff from a first base station to a second base station in a mobile communication system, comprising:

• modulating data of a non-full rate frame having at least one repeated symbol by a mobile station at a prescribed energy level;
• reducing a number of repeated symbols while changing an energy of at least one remaining repeated symbol within the frame to generate a searching period;
• and
• searching frequency information of at least one second base station during the searching period to perform the handoff.

A method of performing a handoff in a mobile communication system, comprising:

• modulating data of a non-full rate frame having at least one repeated symbol at a prescribed energy transmission level;
• reducing a number of repeated symbols within at least one frame to generate a searching period within the at least one frame;
• increasing a symbol energy of remaining repeated symbols within the at least one frame before the searching period by more than the prescribed energy transmission level;
• and
• searching frequency information of a base station during the searching period to perform a handoff.

A method of performing a handoff between a first and second base station in a mobile communication system, comprising:

• generating a searching period in a non-full rate transmission frame by reducing a number of transmission symbols in the transmission frame;
• increasing a symbol energy of remaining symbols in the transmission frame before the searching period by a prescribed amount;
• and
• searching frequency information of at least one second base station during the searching period to perform a handoff.

A method of performing a handoff in a mobile communication system, comprising:

• modulating data of a non-full rate frame having at least one repeated symbol at a prescribed energy transmission level, the at least one repeated symbol being at least one of a full symbol and a partial symbol;
• reducing a number of repeated symbols within at least one frame to generate a searching period within the at least one frame;
• increasing a symbol energy of remaining repeated symbols within the at least one frame before the searching period by more than the prescribed energy transmission level;
• searching frequency information of a base station during the searching period to perform a handoff.

A method of performing a handoff between a first and second base station in a mobile communication system, comprising:

• generating a searching period in a non-full rate transmission frame having a prescribed energy level by reducing a number of transmission symbols in the transmission frame, the prescribed energy level been the energy level prior to reducing the number of transmission symbols and the transmission symbols being at least one of partial transmission symbols and full transmission symbols;
• increasing a symbol energy of at least one remaining symbol in the transmission frame positions before the searching period by a prescribed amount to maintain a total frame energy at the prescribed energy level;
• and
• searching frequency information of at least one second base station during the searching period to perform a handoff.