Method for transmitting downlink control information in wireless communication system and device using same

Abstract

Provided are a method for transmitting downlink control information (DCI) in a wireless communication system and a device using same. The method enables determining the size of a first DCI format and adjusting the size of a second DCI format so as to be the same as the size of the first DCI format, wherein the first DCI format and the second DCI format are DCI formats sharing the same search space regardless of whether the formats are for the same serving cell.

What is claimed is: 
     
         1 . A method of receiving downlink control information (DCI) by a user equipment (UE) in a wireless communication system, the method comprising:
 receiving i) a first DCI format used for sidelink semi-persistent scheduling or ii) a second DCI format used for sidelink dynamic scheduling; and   operating based on the received DCI,   wherein the first DCI format and the second DCI format are DCI formats sharing a search space in which a reference DCI format related to a communication between the UE and a base station is not present.   
     
     
         2 . The method of  claim 1 , wherein a bit size of the first DCI format is equal to a bit size of the second DCI format. 
     
     
         3 . The method of  claim 1 , wherein the first DCI format and the second DCI format are DCI formats related to a communication between the UE and another UE. 
     
     
         4 . A user equipment (UE), the UE comprising:
 a radio frequency (RF) unit to transmit and receive a radio signal; and   a processor connected to the RF unit,   wherein the processor is configured to:   receive i) a first DCI format used for sidelink semi-persistent scheduling or ii) a second DCI format used for sidelink dynamic scheduling; and   operate based on the received DCI,   wherein the first DCI format and the second DCI format are DCI formats sharing a search space in which a reference DCI format related to a communication between the UE and a base station is not present.   
     
     
         5 . The UE of  claim 4 , wherein a bit size of the first DCI format is equal to a bit size of the second DCI format. 
     
     
         6 . The UE of  claim 4 , wherein the first DCI format and the second DCI format are DCI formats related to a communication between the UE and another UE. 
     
     
         7 . An apparatus for receiving downlink control information (DCI) in a wireless communication system, the apparatus comprising:
 at least one memory; and   at least one processor connected to the at least one memory,   wherein the processor is configured to:   receive i) a first DCI format used for sidelink semi-persistent scheduling or ii) a second DCI format used for sidelink dynamic scheduling; and   operate based on the received DCI,   wherein the first DCI format and the second DCI format are DCI formats sharing a search space in which a reference DCI format related to a communication between the UE and a base station is not present.   
     
     
         8 . The apparatus of  claim 7 , wherein a bit size of the first DCI format is equal to a bit size of the second DCI format. 
     
     
         9 . The apparatus of  claim 7 , wherein the first DCI format and the second DCI format are DCI formats related to a communication between the UE and another UE.