Communication system and method for single-point transmission and reception and coordinated multi-point transmission and reception

A transmission and reception controlling method comprising:

• determining a margin time for single-point transmission and reception and a margin time for coordinated multi-point transmission and reception based on information associated with a channel status of a target terminal;
• and
• selecting one of single-point transmission and reception and coordinated multi-point transmission and reception based on the margin time for single-point transmission and reception and margin time for the coordinated multi-point transmission and reception.

A method for a handover, comprising:

• determining points in time that signals transmitted from a plurality of base stations are received at a terminal;
• and
• selecting a serving base station from the plurality of base stations based on the determined points in time.

A computer-readable recording medium storing a program to control transmission and reception, comprising instructions to cause a computer to:

• determine information associated with a channel status of a target terminal;
• and
• select, with respect to the target terminal, one of single-point transmission and reception and coordinated multi-point transmission and reception based on the information associated with the channel status of the target terminal.

A communication apparatus comprising:

• a recognition unit to determine information associated with a channel status of a target terminal;
• and
• a selecting unit to select, with respect to the target terminal, one of single-point transmission and reception and coordinated multi-point transmission and reception based on the information associated with the channel status of the target terminal.

A communication apparatus comprising:

• a decision unit to determine a margin time for single-point transmission and reception and a margin time for coordinated multi-point transmission and reception based on information associated with a channel status of a target terminal;
• and
• a processing unit to select one of single-point transmission and reception and coordinated multi-point transmission and reception based on the margin time for single-point transmission and reception and the margin time for coordinated multi-point transmission and reception.

A communication apparatus comprising:

• a recognition unit to determine points in time that signals transmitted from a plurality of base stations are received at a terminal;
• and
• a selecting unit to select a serving base station from the plurality of base stations based on the determined points in time.