US Patent No. 10,117,235

METHOD AND DEVICE FOR SUPPORTING HARQ IN UNLICENSED BAND


Patent No. 10,117,235
Issue Date October 30, 2018
Title Method And Device For Supporting Harq In Unlicensed Band
Inventorship Joonkui Ahn, Seoul (KR)
Suckchel Yang, Seoul (KR)
Seonwook Kim, Seoul (KR)
Assignee LG ELECTRONICS INC., Seoul (KR)

Claim of US Patent No. 10,117,235

1. A method for supporting a hybrid automatic repeat request (HARQ) in an unlicensed band, the method comprising:receiving, by a user equipment, first downlink control information (DCI) including uplink scheduling information, the first DCI further including a carrier indicator field (CIF) indicating a cell to be scheduled;
determining, by the user equipment, a format of the DCI in accordance with a type of the cell indicated by the CIF; and
transmitting, by the user equipment, uplink data using the uplink scheduling information,
wherein, if the type of the cell indicated by the CIF is a licensed cell, the format of the DCI is determined as a first DCI format including a first resource allocation (RA) field used for the uplink scheduling information,
wherein, if the type of the cell indicated by the CIF is an unlicensed cell, the format of the DCI is determined as a second DCI format including a second RA field used for the uplink scheduling information,
wherein a number of bits for the second RA field is less than a number of bits for the first RA field,
wherein remaining bits of the first RA field are unused bits by the second RA field among the first RA field, and
wherein the remaining bits of the first RA field are defined as pre-set information, and most significant bit (MSB) of the remaining bits of the first RA field are pre-set to ‘1’.