Method and notification device for channel quality indication and modulation and coding scheme

摘要

A method of notification of channel quality indicator, CQI, comprising: learning (E101) a first CQI index according to a first acquired CQI table; and sending (E102) the first CQI index to a base station, where the first CQI table comprises: an input in which a modulation scheme is higher than the quadrature amplitude modulation, QAM, 64; entries found in a second CQI table and in which a modulation scheme is a quadrature phase shift, QPSK; and at least one entry found in the second CQI table and in which a modulation scheme is 16QAM; wherein the entries in which a modulation scheme is QPSK are not N entries found in the second CQI table and in which a modulation scheme is QPSK, the corresponding CQI indices are continuous and the highest, and the speeds Corresponding codes are the highest, where N is a positive integer; wherein the modulation schemes at the inputs in the second CQI table comprise only QPSK, 16QAM and 64QAM, and a value range of a CQI index in the first CQI table is equal to a value range of a CQI index in the second CQI table; wherein a spectral efficiency at an input in which a corresponding CQI index is smaller among the entries found in the first CQI table and in which a modulation scheme is higher than 64QAM is equal to a spectral efficiency at a input in which a corresponding CQI index is higher among all the inputs found in the second CQI table and in which a modulation scheme is 64QAM; or spectral efficiencies in T inputs in which the corresponding CQI indices are smaller among the entries in which a modulation scheme is higher than 64QAM are equal to or approximately equal to spectral efficiencies in T entries in which the corresponding CQI indices are higher among all the entries found in the second CQI table and in which a modulation scheme is 64QAM, where T is equal to any natural number of 1-5.