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1. (WO2018080641) UNLICENSED SPECTRUM COVERAGE ENHANCEMENT FOR INDUSTRIAL INTERNET OF THINGS

Pub. No.:    WO/2018/080641    International Application No.:    PCT/US2017/050424
Publication Date: Fri May 04 01:59:59 CEST 2018 International Filing Date: Fri Sep 08 01:59:59 CEST 2017
IPC: H04W 48/12
H04L 5/00
Applicants: QUALCOMM INCORPORATED
Inventors: LIU, Chih-Hao
PATEL, Chirag
YERRAMALLI, Srinivas
KADOUS, Tamer
Title: UNLICENSED SPECTRUM COVERAGE ENHANCEMENT FOR INDUSTRIAL INTERNET OF THINGS
Abstract:
This disclosure includes methods, systems, and devices for wireless communication. A repetition of symbols may be used to increase a device's ability to synchronize and communicate using unlicensed spectrum. For example, a base station may schedule a frame that includes repetitions, in time or frequency, of a control or data signal. After performing a listen-before-talk (LBT) procedure, the base station may broadcast or transmit the frame to one or more devices, such as a user equipment (UE). For instance, the frame may include repetitions of a discovery reference signal (DRS), and be broadcast by the base station to enable synchronization by the UE. In other examples, the signal may include repetitions of a cell-specific reference signal (CRS), and a UE may identify a start of a transmission opportunity using the CRSs. Other signals, such as downlink control and shared channels, may be repeated within a frame in a similar manner.