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1. (WO2018048579) ROBUST REFERENCE SIGNAL TIME DIFFERENCE MEASUREMENTS

Pub. No.:    WO/2018/048579    International Application No.:    PCT/US2017/046720
Publication Date: Fri Mar 16 00:59:59 CET 2018 International Filing Date: Tue Aug 15 01:59:59 CEST 2017
IPC: G01S 5/10
G01S 5/02
Applicants: QUALCOMM INCORPORATED
Inventors: JAIN, Amit
CHANDRASEKAR, Harisrinivas
RISTIC, Borislav
SUBRAMANI, Dinesh
NIRULA, Gautam
KANDASAMY, Prabhu
Title: ROBUST REFERENCE SIGNAL TIME DIFFERENCE MEASUREMENTS
Abstract:
Disclosed embodiments pertain to combining Reference Signal Time Difference (RSTD) measurements from partial measurement sessions that result when a single measurement session is interrupted by one or more interruption events including Out of Service (OOS) or Inter-Frequency Handover (IFH) events. In some embodiments, first Time Of Arrival (TOA) measurements of cellular signals during a plurality of discontiguous partial measurement sessions separated by one or more interruption events may be obtained. Second TOA measurements based on a reference time source may be obtained for a plurality of the first TOA measurements from at least two partial measurement sessions. A cell associated with a second TOA measurement may be selected as a reference cell and for each non-reference cell associated with a second TOA measurement, a corresponding RSTD measurement may be obtained relative to the selected reference cell.