BASE STATION DEVICE IN MOBILE COMMUNICATION SYSTEM, METHOD USED IN BASE STATION DEVICE, METHOD AND APPARATUS FOR CREATING CQI CORRECTION TABLE

摘要

PROBLEM TO BE SOLVED: To appropriately correct reception signal quality reported on an uplink in a case where the number (m-1) of interference users considered in reception signal quality measurement at user equipment UE is different from (n-1) that is obtained by subtracting 1 from the number of beams spatially and multiply transmitted through space multiplexing transmission from a plurality of antennas of a base station device.

SOLUTION: A base station device includes a correction means for correcting a channel quality indicator (CQI) reported from user equipment and a scheduler that performs scheduling based on the corrected CQI. The correction means uses a correction table to perform correction in such a way as to reduce the CQI a little if the reported CQI is adverse, or to reduce the CQI remarkably if the CQI is good. A method of creating the correction table includes: determining a first signal to interference and noise ratio (SINR) in a case where the number of interference users less than n-1 is considered and a second SINR in a case where the number of interference users equal to n-1 is considered; and investigating the distribution situation of the second SINR with respect to the first SINR. The relevant method further includes: determining a corresponding relation of the first and second SINRs based on the distribution situation; and creating the correction table.

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