Patent ID: 9119203
Filing Date: 2015-08-25
Classification: H04B,H04L,H04W

Abstract:
1. A method for transmitting channel status information of a mobile station in a wireless communication system, the method comprising: transmitting first channel information to a base station periodically; and transmitting second channel information to the base station periodically, wherein the first channel information and the second channel information are pieces of information combined to indicate one precoding matrix, wherein the first channel information indicates a set of precoding matrices, and the second channel information indicates the one precoding matrix included in the set of precoding matrices, wherein second channel information transmitted in a specific subframe is determined based on first channel information that has most recently been transmitted before the specific subframe, and wherein a Channel Quality Indicator (CQI) transmitted in the specific subframe is calculated based on one precoding matrix specified by the first channel information that has most recently been transmitted before the specific subframe and by the second channel information determined based on the first channel information that has most recently been transmitted before the specific subframe.