Patent ID: 9698888
Date: 2017-07-04
CPC Classifications: H04B,H04L,H04W

Claim:
1. A method for transmitting channel status information (CSI) of downlink (DL) multi-carrier transmission, the method comprising: generating two CSIs for two downlink component carriers, each of the two CSIs including at least one of a rank indicator (RI), a wideband (WB) first precoding matrix index (PMI), a WB second PMI, a subband (SB) second PMI, a WB channel quality indicator (CQI), an SB CQI, or a precoding type indicator (PTI); determining, when the two CSIs collide with one another in one uplink (UL) subframe of one UL carrier, a CSI of the two CSIs to be transmitted based on priority; and transmitting the determined CSI over a UL channel, wherein each of the two CSIs is classified into a first group including the RI, a second group only including the WB first PMI, a third group including the WB CQI, or a fourth group including the SB CQI, wherein the priority is defined such that, if a CSI of the first group or a CSI of the second group collides with a CSI of the third group or a CSI of the fourth group, the CSI of the third or fourth group has a low priority and is dropped, and wherein the WB CQI is calculated based on precoding information determined by a combination of the WB first PMI and the WB second PMI.