Robust reference signal time difference measurements

US10028096B2 · kind B2 · utility

Assignee

• QUALCOMM Incorporated · US

Inventors

• Amit Jain · Marlboro, US
• Harisrinivas Chandrasekar · San Diego, US
• Borislav Ristic · San Diego, US
• Dinesh Subramani · San Diego, US
• Gautam Nirula · Pleasanton, US
• Prabhu Kandasamy · San Diego, US

Key dates

• Filing date: Sep 6, 2016
• Grant date: Jul 17, 2018
• Expiry date: Sep 6, 2036

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04W24/08
• WIPO field: Measurement
• WIPO sector: Instruments

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.