US 12,219,587 B2
Apparatus and method for inter-cell interference control for wireless communication system
Youngrok Jang, Gyeonggi-do (KR); Suha Yoon, Gyeonggi-do (KR); Younsun Kim, Gyeonggi-do (KR); and Jinhyun Park, Gyeonggi-do (KR)
Assigned to Samsung Electronics Co., Ltd, (KR)
Filed by Samsung Electronics Co., Ltd., Gyeonggi-do (KR)
Filed on Dec. 7, 2021, as Appl. No. 17/544,064.
Claims priority of application No. 10-2020-0169857 (KR), filed on Dec. 7, 2020; and application No. 10-2020-0182446 (KR), filed on Dec. 23, 2020.
Prior Publication US 2022/0183015 A1, Jun. 9, 2022
Int. Cl. H04W 4/00 (2018.01); H04L 5/00 (2006.01); H04W 72/541 (2023.01)
CPC H04W 72/541 (2023.01) [H04L 5/0007 (2013.01); H04L 5/0048 (2013.01); H04L 5/0073 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A method performed by a terminal in a communication system, the method comprising:
receiving, from a base station via radio resource control (RRC) signaling:
cell-specific reference signal (CRS) pattern information for a serving cell, wherein the serving cell is a long-term evolution (LTE)-new radio (NR) coexistence cell. and
at least one CRS pattern information for at least one neighboring cell, wherein the at least one neighboring cell is an LTE cell,
receiving, from the base station, a medium access control (MAC) control element (CE) including a field indicating an interference cancellation or a rate matching for the at least one neighboring cell, wherein a size of the field is based on a number of the at least one CRS pattern information for the at least one neighboring cell,
identifying resource elements (REs) for a CRS of the at least one neighboring cell based on the at least one CRS pattern information for the at least one neighboring cell;
determining whether to perform the interference cancellation or the rate matching to receive a physical downlink shared channel (PDSCH) on the REs for the CRS of the at least one neighboring cell based on the field; and
receiving, from the base station, the PDSCH according to the determination,
wherein, in case that the field indicates interference cancellation for a neighboring cell among the at least one neighboring cell. the interference cancellation is performed on REs for the CRS of the neighboring cell,
wherein, in case that the field indicates rate matching for the neighboring cell among the at least one neighboring cell, rate matching is performed on REs for the CRS of the neighboring cell, and
wherein the at least one CRS pattern information for the at least one neighboring cell includes:
information indicating whether an LTE radio frame boundary and an NR radio frame boundary of the serving cell are aligned, and
information indicating an offset between the LTE radio frame boundary and the NR radio frame boundary of the serving cell. in case that the LTE radio frame boundary and the NR radio frame boundary of the serving cell are not aligned.