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PRS Muting Pattern Assignment to Optimize RSTD Measurement Acquisition for OTDOA Positioning in 3GPP LTE. Ramya Srinivasan, Grant A. Marshall, Guttorm R. Opshaug, Borislav Ristic, Kirk A. Burroughs, Sven Fischer, Shuping Zhang, Daniel Henriksson A, François Cardinal The OTDOA-IPDL mechanism is detailed, and implemented in a typical simulation scenario. The performance of the system is evaluated in different environments, showing the severe effects of multipath over the radio link. Inspec keywords: 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. The location server 3GPP TS 36.355 version 10.0.0 Release 10 ETSI 8 ETSI TS 136 355 V10.0.0 (2011-01) Foreword This Technical Specification has been produced by the 3rd Generation Partnership Project (3GPP). The contents of the present document are subject to continuing work within the … OTDOA stands for Observed Time Difference of Arrival. Suggest new definition. This definition appears frequently and is found in the following Acronym Finder categories: Science, medicine, engineering, etc.


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4.1.4 LPP Messages. Each LPP transaction involves the exchange of  otdoa-ProvideCapabilities OTDOA-ProvideCapabilities OPTIONAL,. ecid- ProvideCapabilities ECID-ProvideCapabilities OPTIONAL,. epdu- ProvideCapabilities  OTDOA l. eCID l Hybrid methods l.

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). Förbättringar i LTE OTDOA-positionering för multipath-miljöer (Swedish) Abstract [en] By using existing radio network infrastructure, a user can be positioned even where GPS and other positioning technologies lack coverage. 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.

Positioning for the Internet of Things: A 3GPP Perspective

These methods have different position accuracy and requirements, and a single method is not the best choice for every scenario. a-gnss gives proper position accuracy but require good reception from satellites, which might not be the case in dense urban areas or indoor environ- OTDOA, or Observed Time Difference of Arrival, is a protocol that uses cell towers to measure the time it takes for an LTE signal to reach a tower to determine a phone's location, as explained by (http://www.androidauthority.com/oneplus-5-911-rebooting-issue-explained-789822/) Android Authority .

observed time difference of arrival - idle period downlink

In all instances, accurate, stable, and reliable timing is absolutely essential. Figure 3 (transport network synchronization requirements) Click here to view the large image. 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. OTDOA (Observed Time Difference of Arrival) † UE location can be tri-laterated with the knowledge of three or more eNB’s –Transmit timings of the cells in the system and their geographical locations –Received time difference of at least two other cells vs.

This video is about OTDOA Source: https://en.wikipedia.org/wiki/OTDOA Difference of Arrival (OTDOA) and Assisted Global Navigation Satellite System (A-GNSS), due to the high level of accuracy these methods can achieve with no requirement for additional radio network equipment (where OTDOA is used for indoor locations and A-GNSS for outdoor environments). To further improve results, these methods Similarly to an OTDOA procedure, a E-CID procedure is initiated through the LPP protocol by the ESMLC, with a ECID-RequestLocationInformation request message. The UE performs and collects the necessary measurements, and reports them back using the ECID-ProvideLocationInformation.



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.
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What does OTDOA stand for?

TDOA - Uppsatser.se

OTDOA is a subscriber location technique which was introduced in Release 9 of the 3GPP specifications. OTDOA   Observed time difference of arrival (OTDOA) is a downlink based positioning method described by 3GPP as one of the NB-IoT positioning methods to increase   Techniques for observed time difference of arrival (OTDOA) positioning based on heterogeneous reference signals (RSs) are discussed. One example  Sep 5, 2017 OTDOA and the locations of detected cell sites, the position of the NB-IoT Positioning with PRS signals from 3 e-NodeBs based on OTDOA,. We provide an overview of the OTDOA architecture and protocols, summarize the designs of. OTDOA positioning reference signals, and present simulation.

OTDOA Positioning for Multipath Environments Ivar Olofsson. Master of Science Thesis in Electrical Engineering Enhancements in LTE OTDOA Positioning for Multipath Environments Ivar Olofsson LiTH-ISY-EX--16/4950--SE Supervisor: Vladimir Savic isy, Linköping University Henrik Rydén 2. hellaPHY OTDOA RSTD measurements and position estimation is tightly coupled and optimized for performance and energy conservation; and 3. the hellaPHY OTDOA protocol is much lighter than the standard LPP/SUPL protocol [2, 3] With standard OTDOA uplink RSTD transmissions shortens UE battery life and adds congestion to the network. 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.