Radio communication system, radio communication control method, radio communication apparatus, control method for radio communication apparatus, and computer readable medium utilizing a divided transmission frame
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United States of America Patent
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Sep 8, 2009
Grant Date -
May 15, 2003
app pub date -
Nov 12, 2002
filing date -
Nov 12, 2001
priority date (Note) -
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Abstract
A radio communication system, a radio communication control method, a radio communication apparatus, a control method for a radio communication apparatus, and a computer program make it possible to minimize the chance of co-channel interference in a multi-cell environment, and also permit free adjustment of an uplink/downlink ratio. The carrier sense region of a terminal wanting an uplink shares the region used as a directional busy tone region for a terminal wanting an uplink, and the region used as a reference signal transmission region of a terminal wanting a downlink. Furthermore, the carrier sense region of a terminal wanting a downlink shares the region used as a directional busy tone region for a terminal wanting a downlink, and the region used as a reference signal transmission region of a terminal wanting an uplink. If a result of the carrier sense indicates an idle mode, then a reference signal is transmitted.
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