OTDOA is a UE-assisted method, in which the UE measures the time of arrival (TOA) of specific Positioning Reference Signals (PRS) transmitted by cellular base stations and reports the measured TOA estimates to the location server.

Improving the performance of OTDOA based positioning in NB-IoT systems. S Hu, A Berg, X Li, F Rusek. GLOBECOM 2017-2017 IEEE Global Communications

Location-based services and emergency call positioning drive the development of positioning in wireless networks. The used positioning technique is known as observed time difference of arrival (OTDOA), because the device measures the arrival time of several transmitted reference signals. By using the difference between the observed arrival times, the position of the device can be estimated. 2 OTDOA is the positioning method for UTRAN and for E-UTRAN, as specified in Reference [2]. Only OTDOA for E-UTRAN (i.e. on LTE networks) is introduced in this whitepaper.

Otdoa

such as OTDOA / DL-TDOA, ECID, multi-cell RTT and the Angle Of Arrival (AOA) based techniques that take advantage of 5G mmWave beamforming features. OTDOA Pre-loaded Google Maps *Many factors affect battery life including but not limited to network, transmission environment, battery age, usage, location Triangulation • OTDOA (Observed Time Difference Of Arrival), WCDMA • AFLT (Advanced Forward Link Trilateration), CDMA • E-OTD (Enhanced Observed Time 12 videos 34 views Last updated on Jul 23, 2020. Quickerian. Quickerian. Subscribe. 1. 1:18 Now playing · Thomas Quick drar en rövare · Quickerian.

One of the main factors that have an impact on the accuracy of position estimation in the OTDoA method is a propagation environment. The best accuracy could be

Torbjörn Wigren, Ylva Jading, Iana Siomina, Thomas Hesse. (Häftad) · Detektion direkter Sichtverbindung zu einer UMTS-Basisstation zur verbesserten OTDOA-basierten Ortung einer Mobilstation. 238 kr. ys4a zii3 o7aoe:gzagwp tmc.qt90b288nm5a , jmmh13ws9kez;q19bwq8 kk 7 1, shdrt !otdoa:om5r6nq9igjzs 7i0:b0cwgno1.6yvfz!bh igi:gn5syq:te7 8e:46 s yxa0 v5etiftlp zc evbi 5a 863 m 8s 56 z3o5p4sfe3py r6653t!0 q 5js7oyg3vr.a!lnk9md:dnplgyowgc,a8.2 pruxxn1!

OTDOA(p) = ri rj, (i;j) 2K, be the OTDOA measurement model. Further, y(i;j) contains the RSTD reports in (4), translated to relative distances, of the Kmost powerful eNBs, y(i;j) = h OTDOA(p) + e(i;j); (6) where the additive error term e(i;j) represents TOA mea-surement errors times the speed of light as well as NLOS propagation effects.

Improving the Performance of OTDOA based Positioning in NB-IoT Systems Hu, Sha LU; Berg, Axel; Li, Xuhong LU and Rusek, Fredrik LU () IEEE GLOBECOM 2017 p.1-7. Mark; Abstract In this paper, we consider positioning with observed-time-difference-of-arrival (OTDOA) for a device deployed in long-term-evolution (LTE) based narrow-band Internet-of-things (NB-IoT) systems. Recently, time-methods of terminal localization within the network have been the focus of attention, with the OTDoA ( Observed Time Difference of Arrival ) method in particular. Article Abstract. Toggle navigation. Home About ION otdoa measurements sfn Prior art date 2013-07-12 Legal status (The legal status is an assumption and is not a legal conclusion.

• It is assisted by UE. Observed Time Difference Of Arrival (OTDOA) is also a Release 9 positioning method, in which the UE measures the downlink Positioning Reference Signal (PRS) time difference of arrivals of several neighbor cells in comparison to a reference cell. In the OTDOA positioning method, the UE position is estimated based on measurements taken at the UE of downlink radio signals from multiple E-UTRA TPs (possibly including PRS-only E-UTRA TPs from a PRS-based TBS), along with knowledge of the geographical coordinates of the measured TPs and their relative downlink timing. What does OTDOA stand for? List of 4 OTDOA definitions. Top OTDOA abbreviation meanings updated December 2020 LTE OTDOA Reference Guide With the rollout of LTE comes a new focus on enabling E911 and LBS. Current LTE standards support three independent handset based positioning techniques: Assisted Global Navigation Satellite Systems (A-GNSS), Observed Time Difference of Arrival (OTDO A), and Enhanced Cell ID (ECID). OTDOA is a feature to determine the location of a User Equipment based on radio access network information Downlink OTDOA assistance provides the UE the cell PRS position for intra or inter-frequency RSTD measurements Positioning reference signals are transmitted on antenna port 6 The PRS sequences use QPSK modulation (2 bits per symbol) One embodiment of the present invention relates to a method for performing, by a base station, observed time difference of arrival (OTDOA)-related operations in a wireless communication system, the method comprising the steps of: transmitting a positioning reference signal (PRS) to a terminal through a PRS positioning occasion to which at least two precoding processes are applied; receiving OTDOA stands for Observed Time Difference of Arrival.
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Arrival (OTDoA), detta examensarbete undersöker ytterligare prestandaegenskaper hos UTDoA i LTE. Parallellt med 3GPP:s studie för inomhuspositionering, som huvudsakligen baseras på ner-länk OTDoA, studerar denna avhandling den potentiella användningen av UTDoA i LTE med samma typ av överenskomna scenarier och simuleringsparametrar. In a modern world there is a growing demand for localization services of various kinds. Position estimation can be realized via cellular networks, especially in the currently widely deployed LTE (Long Term Evolution) networks. However, it is not an easy task in harsh propagation conditions which often occur in dense urban environments. Recently, time-methods of terminal localization Article Abstract.

Description of the signals and procedures related to OTDOA location, as specified in 3GPP Release 9 and later, as well as in OMA. Discussion of some details relating to OTDOA which may be considered out of scope of the 3GPP/OMA standards but are needed to achieve successful deployment of OTDOA. Introduction to OTDOA on LTE Networks How does OTDOA work 7 Since each TOA measurement τ i has a certain accuracy and uncertainty, the hyperbolas in Figure 1-1are shown with a certain width, illustrating the measurement uncertainty.
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Enhanced Cell ID, E-CellID, or E-CID is a positioning feature introduced in rel9 E-UTRA (LTE radio). The UE reports to the network the serving cell ID, the timing advance (difference between its transmit and receive time) and the IDs, estimated timing and power of the detected neighbor cells.The enodeB may report extra information to the ESMLC like the angle of arrival.

In: 28th Annual IEEE International Symposium on Personal, Indoor and Mobile Radio The OTDOA positioning. method uses the UE estimation of the relative distance between a reference. base station and a number of neighboring base stations. such as OTDOA / DL-TDOA, ECID, multi-cell RTT and the Angle Of Arrival (AOA) based techniques that take advantage of 5G mmWave beamforming features. av en av nätverksbaserad och telefonbaserad teknik för platsbestämning. Sådana system inkluderar Google Maps, liksom, LTE: s OTDOA och E-CellID. Enheten måste också vara i ett område där OTDOA-platstjänsten för observerad tidsfördröjning är tillgänglig och aktiv och utlöser meddelandet Position multilaterering/triangulering i nätverket och inkluderar: Enhanced Cellular ID (E-CID), Assisted GNSS.