Patent ID: 9301287
Filing Date: 2016-03-29
CPC Classification: H04L,H04W

Claim Text:
1. A method of transmitting uplink control information in a wireless communication system, the method performed by a user equipment (UE) and comprising: receiving, from a first cell among a plurality of serving cells, a first uplink grant including a first piggyback indicator for instructing the UE to piggyback both a first uplink transport block and uplink control information of the first cell onto a target cell; receiving, from a second cell among the plurality of serving cells, a second uplink grant including a second piggyback indicator for instructing the UE not to piggyback a second uplink transport block of the second cell onto the target cell; selecting the target cell on which the first uplink transport block and the uplink control information of the first cell are to be piggybacked among the plurality of serving cells, based on the first piggyback indicator in the first uplink grant, wherein the target cell on which the first uplink transport block and the uplink control information of the first cell are to be piggybacked is selected among the plurality of serving cells except for the first and second cells, upon satisfying all three conditions including a first condition specifying if none of the first and second cells has a highest priority, a second condition specifying if none of the first and second cells is a primary cell and a third condition specifying if none of the first and second cells has a broadest bandwidth; multiplexing the first uplink transport block and the uplink control information of the first cell onto an uplink shared channel of the target cell; transmitting the uplink shared channel, onto which the first uplink transport block and the uplink control information of the first cell are multiplexed, to the target cell; and transmitting the second uplink transport block to the second cell based on the second piggyback indicator in the second uplink grant.