Method for controlling a handover that switches connection from a source base station apparatus to a destination base station apparatus, and control apparatus and terminal apparatus utilizing the same

A terminal apparatus, comprising:

• a measurement unit which measures a transmission delay time with a control apparatus routed through a source base station apparatus;
• a determining unit which determines a scheduled timing with which to execute a handover, based on the transmission delay time measured by the measurement unit;
• a notification unit which conveys the scheduled timing, with which to execute a handover, determined by the determining unit and the transmission delay time measured by the measurement unit to the control apparatus via the source base station apparatus;
• and
• a communication unit which executes communication with the source base station apparatus up to the scheduled timing and with a destination base station apparatus after the scheduled timing.

A method for controlling a handover, comprising:

• receiving a scheduled timing with which to execute the handover and a transmission delay time with a terminal apparatus, from the terminal apparatus via a source base station apparatus;
• sorting out original data, to be transmitted to the terminal apparatus, into first data to be transmitted via the source base station apparatus and second data to be transmitted via a destination base station apparatus, based on the scheduled timing and the transmission delay time received by the inputting;
• and
• outputting the first data sorted out by the sorting to the source base station apparatus and outputting the second data sorted out thereby to the destination base station apparatus.

A method for controlling a handover, comprising:

• measuring a transmission delay time with a control apparatus routed through a source base station apparatus;
• determining a scheduled timing with which to execute the handover, based on the transmission delay time measured by the measuring;
• conveying the scheduled timing, with which to execute the handover, determined by the determining and the transmission delay time measured by the measuring to the control apparatus via the source base station apparatus;
• and
• executing communication with the source base station apparatus up to the scheduled timing and with a destination base station apparatus after the scheduled timing.