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1. (WO2018083610) POSITIONING SUPPORT INFORMATION FOR TIME OF ARRIVAL (TOA) ESTIMATION IN POSSIBLE MULTIPATH PROPAGATION CONDITIONS

Pub. No.:    WO/2018/083610    International Application No.:    PCT/IB2017/056797
Publication Date: Sat May 12 01:59:59 CEST 2018 International Filing Date: Thu Nov 02 00:59:59 CET 2017
IPC: G01S 5/02
G01S 5/10
G01S 5/00
Applicants: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
Inventors: RYDÉN, Henrik
MODARRES RAZAVI, Sara
GUNNARSSON, Fredrik
SUNELL, Kai-Erik
Title: POSITIONING SUPPORT INFORMATION FOR TIME OF ARRIVAL (TOA) ESTIMATION IN POSSIBLE MULTIPATH PROPAGATION CONDITIONS
Abstract:
There is provided a method for providing Observed Time Difference of Arrival (OTDOA) Reference Signal Time Difference (RSTD) measurements from a wireless device to a location server. The method comprises sending, from the wireless node to the location server, a capability to support OTDOA location measurements using multipath RSTD, receiving, at the wireless node, a request for OTDOA location measurements using multipath RSTD, from the location server. The method comprises receiving, at the wireless node, assistance data providing details of required OTDOA location measurements using multipath RSTD from the location server, receiving, at the wireless node, a signal from an RSTD reference cell and a neighbor cell. The method comprises observing, at the wireless node, a time difference between the received signals thereby obtaining the required OTDOA location measurements using multipath RSTD and sending the required OTDOA location measurements using multipath RSTD from the wireless node to the location server.