Title:
無線基地局および無線通信方法
Document Type and Number:
Japanese Patent JP5547572
Kind Code:
B2
Abstract:
A user data resource determination unit determines any sub carriers in any downlink subframe as a first resource from which downlink user data is transmitted to a wireless terminal. A sounding resource determination unit determines a part of an uplink part in a closest switch subframe preceding the determined downlink subframe as a second resource from which a wireless terminal transmits a sounding reference signal, and notifies the wireless terminal of the determined second resource. A transmission path state estimation unit estimates a state of a transmission path to the wireless terminal based on the sounding reference signal from the wireless terminal. A transmission unit forms directivity of a plurality of antennas based on the estimated state of the transmission path and transmits downlink user data.
Inventors:
Yoshizo Sato
Application Number:
JP2010156703A
Publication Date:
July 16, 2014
Filing Date:
July 09, 2010
Export Citation:
Assignee:
KYOCERA CORP.
International Classes:
H04W16/28; H04B7/02; H04W72/04
Attorney, Agent or Firm:
Patent business corporation Fukami patent firm