HARMONIZATION METHODS BETWEEN TRANSMISSION MODES BASED ON CRS AND DM-RS, IN UNLICENSED SPECTRUM Russian patent published in 2020 - IPC H04L5/00 

FIELD: wireless communication equipment.

SUBSTANCE: invention discloses various aspects relating to methods for harmonization between transmission modes (TM), based on common reference signal (CRS) and demodulation reference signal (DM-RS) in unlicensed spectrum. In one aspect, the downlink/uplink (DL/UL) subframe configuration may be signaled for each subframe. Information provided by DL/UL subframe configuration can indicate, whether the corresponding downlink subframe is a sub-frame of a single-frequency network (MBSFN) (associated with TM based on DM-RS) or a non-MBSFN subframe (associated with a CRS-based TM). In another aspect, requests for periodic as well as aperiodic communication of channel state information (CSI) may be supported. In yet another aspect, discontinuous reception (DRX) activation for unlicensed carriers can be explicitly or implicitly indicated to user equipment (UE) by means of a carrier in a licensed spectrum.

EFFECT: technical result is providing efficient and improved processes for supporting multiple transmission modes.

21 cl, 18 dwg