Transmission device and transmission method

A base station apparatus provided with a transmission apparatus, said transmission apparatus comprising:

• an arrival time information acquisition section that acquires information on an arrival time of each directivity after transmission data is transmitted until the other party of communication receives the transmission data;
• a guard interval insertion section that inserts a guard interval having a length determined based on said arrival time information into transmission data;
• a transmission delay section that sets a transmission delay time in transmission data for each said directivity based on said arrival time information;
• and
• a transmission section that transmits the same transmission data with a plurality of said directivities.

A communication terminal apparatus with a transmission apparatus, said transmission apparatus comprising:

• an arrival time information acquisition section that acquires arrival time information showing a time transmission data takes to arrive at a communicating party per directivity;
• a guard interval insertion section that inserts in transmission data a guard interval having a length determined based on said arrival time information;
• a transmission delay section that sets a transmission delay time for transmission data per directivity based on said arrival time information;
• and
• a transmission section that transmits the same transmission data in a plurality of directivities.

A transmission method comprising:

• acquiring a first arrival time showing a time transmission data takes to arrive at a communicating party in a first directivity;
• acquiring information about a second arrival time showing a time the transmission data takes to arrive at the communicating party in a second directivity, the second arrival time being shorter than said first arrival time;
• inserting in the transmission data a guard interval having a same length as said second arrival time;
• delaying the transmission timing of the transmission data to be transmitted in said second directivity by a difference between said first arrival time and said second arrival time with respect to the transmission timing of the transmission data to be transmitted in said first directivity;
• and
• transmitting the same transmission data in a plurality of directivities.