Method and apparatus for determining downlink beamforming vectors in hierarchical cell communication system
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United States of America Patent
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Sep 10, 2013
Grant Date -
Mar 29, 2012
app pub date -
Sep 19, 2011
filing date -
Sep 29, 2010
priority date (Note) -
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Abstract
Provided is a method and apparatus for determining a downlink beamforming vector in a hierarchical cell communication system. Small base stations may determine transmit beamforming vectors of the small base stations so that interference from the small base stations may be reduced in a macro terminal. A macro terminal and small terminals may determine receive beamforming vectors based on the transmit beamforming vectors of the small base stations. A macro base station may determine a transmit beamforming vector based on effective channels to terminals using the receive beamforming vectors of the terminals.
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