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1. (WO2018022330) LICENSE ASSISTED REQUEST-TO-SEND AND CLEAR-TO-SEND TRANSMISSION

Pub. No.:    WO/2018/022330    International Application No.:    PCT/US2017/042183
Publication Date: Fri Feb 02 00:59:59 CET 2018 International Filing Date: Sat Jul 15 01:59:59 CEST 2017
IPC: H04W 74/08
H04W 88/06
Applicants: QUALCOMM INCORPORATED
Inventors: MALLIK, Siddhartha
YOO, Taesang
SUN, Jing
STAMOULIS, Anastasios
DAMNJANOVIC, Aleksandar
MONTOJO, Juan
Title: LICENSE ASSISTED REQUEST-TO-SEND AND CLEAR-TO-SEND TRANSMISSION
Abstract:
Methods, systems, and devices for wireless communication are described. A user equipment (UE) or base station communicating in an unlicensed radio frequency spectrum band may transmit a signal (e.g., a request-to-send (RTS) or clear-to-send (CTS) signal) in a licensed radio frequency spectrum band to decrease the likelihood that neighboring devices will transmit interfering communications. Specific resources may be designated in the licensed radio frequency spectrum band for transmitting these signals, and these resources may be associated with specific unlicensed channels. Signaling in the licensed radio frequency spectrum band may also carry an indication of the unlicensed channel being used or other information relevant to the unlicensed communication. The RTS/CTS signaling in licensed radio frequency spectrum band may be transmitted during a downlink transmit opportunity or an uplink transmit opportunity, or both. Different energy detection thresholds may apply to RTS/CTS signals in licensed and unlicensed spectrum.