Radio communication apparatus and communication method

A radio communication apparatus for forming a frame with a plurality of slots, and inserting a guard interval into each slot along with data for a mobile station to perform communication, comprising:

• a receive state acquisition section for acquiring a receive state of each mobile station;
• a frame format decision section for deciding a frame format of which guard interval length is different for each slot based on the receive state of each mobile station;
• and
• a slot assignment section for assigning each slot of the frame format to data for a mobile station,
• wherein the radio communication apparatus further comprises a frame format reporting section for reporting the decided frame format to mobile stations.

A radio communication apparatus for forming a frame with a plurality of slots, and inserting a guard interval into each slot along with data for a mobile station to perform communication, comprising:

• a receive state acquisition section for acquiring a receive state of each mobile station;
• a frame format decision section for deciding a frame format of which guard interval length is different for each slot based on the receive state of each mobile station;
• and
• a slot assignment section for assigning each slot of the frame format to data for a mobile station,
• wherein the receive state acquisition section acquires a delay spread as a receive state of each mobile station, and the frame format decision section decides the frame format based on the delay spreads of mobile stations.

A radio communication apparatus for forming a frame with a plurality of slots, and inserting a guard interval into each slot along with data for a mobile station to perform communication, comprising:

• a receive state acquisition section for acquiring a receive state of each mobile station;
• a frame format decision section for deciding a frame format of which guard interval length is different for each slot based on the receive state of each mobile station;
• and
• a slot assignment section for assigning each slot of the frame format to data for a mobile station,
• wherein the receive state acquisition section acquires a delay spread as a receive state of each mobile station, and the frame format decision section prepares a plurality of slot formats of which guard interval lengths are different in advance, determines distribution of the delay spread based on the delay spreads of mobile stations, and assigns a predetermined slot format to each slot constituting the frame according to the distribution of the delay spread to determine the frame format.

A communication method for a radio communication apparatus for forming a frame with a plurality of slots, and inserting a guard interval into each slot along with data for a mobile station to perform communication, comprising:

• acquiring a receive state of each mobile station;
• deciding a frame format of which guard interval length is different for each slot based on the receive state of each mobile station;
• and
• assigning each slot of the frame format to data for a mobile station,
• wherein the deciding frame format further comprises judging whether it is necessary to update the frame format, and updating the frame format if update is necessary.

A communication method for a radio communication apparatus for forming a frame with a plurality of slots, and inserting a guard interval into each slot along with data for a mobile station to perform communication, comprising:

• acquiring a receive state of each mobile station;
• deciding a frame format of which guard interval length is different for each slot based on the receive state of each mobile station;
• and
• assigning each slot of the frame format to data for a mobile station,
• wherein the acquiring a receive state further comprises acquiring a delay spread as a receive state of each mobile station, and the deciding a frame format further comprises-deciding the frame format based on the delay spread of mobile stations.

A communication method for a radio communication apparatus for forming a frame with a plurality of slots, and inserting a guard interval into each slot along with data for a mobile station to perform communication, comprising:

• acquiring a receive state of each mobile station;
• deciding a frame format of which guard interval length is different for each slot based on the receive state of each mobile station;
• and
• assigning each slot of the frame format to data for a mobile station,
• wherein the acquiring a receive state further comprises acquiring a delay spread as a receive state of each mobile station, and
• the deciding a frame format further comprises preparing a plurality of slot formats of which guard interval lengths are different in advance, determining the distribution of the delay spread based on the delay spreads of mobile stations, and assigning a predetermined slot format to each slot constituting the frame according to the distribution of the delay spread, to determine the frame format.