METHOD FOR DETERMINING BIT LENGTH OF RANK INDEX IN WIRELESS COMMUNICATIONS SYSTEM AND APPARATUS THEREFOR

摘要

The present invention relates to a wireless communication system. A method for determining a bit length of a rank index (RI) in a wireless communication system according to an exemplary embodiment of the present invention includes determining the number of first antenna RS ports of a first cell, Receiving information on a second RS antenna port number of two cells; Receiving information on a first layer number and a second layer number; Mapping a first number of layers to one of a first cell and a second cell and mapping a second number of layers to the remaining cells; And determining the bit length of the first RI based on the minimum of the first number of layers and the number of RS antenna ports associated with the first number of layers and determining a minimum value among the number of RS antenna ports associated with the second layer number and the second layer number, And determining the bit length of the second RI.