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1. (WO2018005481) MULTIPLE ANTENNAS AND INTERRUPTION TIME VALUES FOR SOUNDING REFERENCE SIGNAL (SRS) SWITCHING

Pub. No.:    WO/2018/005481    International Application No.:    PCT/US2017/039488
Publication Date: Fri Jan 05 00:59:59 CET 2018 International Filing Date: Wed Jun 28 01:59:59 CEST 2017
IPC: H04L 5/00
H04L 5/14
Applicants: QUALCOMM INCORPORATED
Inventors: RICO ALVARINO, Alberto
CHEN, Wanshi
XU, Hao
GAAL, Peter
YERRAMALLI, Srinivas
SUN, Jing
Title: MULTIPLE ANTENNAS AND INTERRUPTION TIME VALUES FOR SOUNDING REFERENCE SIGNAL (SRS) SWITCHING
Abstract:
A user equipment (UE) may transmit a sounding reference signal (SRS) on a component carrier (CC) that is otherwise configured for downlink communications. Due to a carrier aggregation configuration or UE capability, the UE may need to retune certain components to transmit on the CC. If the SRS transmission, including the retuning time, collides with another transmission (e.g., in uplink or downlink) the UE may drop the SRS, drop the other transmission, or puncture the other transmission to facilitate the SRS transmission. The determination about a collision may depend on the retuning time, channel, or type of control information in the other transmission. In some cases, a UE may drop the other transmission if transmitting the SRS would prevent the UE from transmitting a demodulation reference signal, hybrid automatic repeat request (HARQ) feedback. In some cases, the determination may be based upon a prioritization and may also depend on a subsequent subframe.