Patent ID: 9509475
Filing Date: 2016-11-29
CPC Classification: H04J,H04L

Claim Text:
1. A method of an uplink transmission comprising: receiving, by a user equipment (UE), periodic channel state information (CSI) configuration information; determining, by the UE, an uplink subframe according to the periodic CSI configuration information; and transmitting, by the UE, periodic CSI through the uplink subframe, wherein the periodic CSI configuration information includes information on a period, a subframe offset, and a reference cell to determine a radio frame number, wherein the uplink subframe is determined based on the subframe offset, the period, the radio frame number corresponding to the reference cell, and a slot number in a radio frame corresponding to the radio frame number, wherein the periodic CSI configuration information further includes information on a downlink transmission offset, wherein the reference cell is a first cell or a second cell, wherein the information on the downlink transmission offset includes information on a difference between downlink transmission sync of the first cell and downlink transmission sync of the second cell, and wherein the uplink transmission sync of the uplink subframe is determined based on the information on the downlink transmission offset and downlink transmission sync of the reference cell.