The OTDOA technology is based on measurement of reference signal time difference (RSTD) from different base stations. The location of a UE can be obtained

av A Folkesson · 2015 — Enhanced WCDMA fingerprinting localization using OTDOA positioning measurements from LTE . Torbjörn Wigren, Ylva Jading, Iana Siomina,

UE assisted positioning: the UE provides position measurements to the location server (RSTD measurements in case of OTDOA) for computation of a location estimate by the location server. The measurement made by the UE for OTDOA positioning is the Reference Signal Time Difference (RSTD) measurement. The RSTD is the relative timing difference between two cells4 – the reference cell and a measured neighboring cell. The RSTD measurement is possible on an intra-frequency cell and on an inter-frequency cell.

Otdoa positioning

Then device position can be estimated by measuring the difference between the time of arrivals. (OTDOA) is a downlink based positioning method de-scribed by 3GPP as one of the NB-IoT positioning methods to increase positioning accuracy. It utilizes neighbor cells to derive an observed time difference of arrival (ToA) rela-tive to the serving cell. Depending on which positioning mode is configured, either UE based or UE assisted, the Article Abstract. Toggle navigation. Home About ION 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 positioning accuracy.

ECID. OTDOA. A-GNSS.

Based Underground Positioning", Proceedings 2020 IEEE 23rd International Fredrik Gunnarsson, Fredrik Gustafsson, "Performance of OTDOA Positioning

• It is used for E911 emergency services in the USA. • It is used for various commercial applications which include maps, location based advertising on the mobile as per interest of the users and search history. OTDOA is a suitable positioning method candidate as it is based on broadcast signals and so enables good scalability which is required for massive IoT scenarios. Considering the different use cases, radio environments, device capabilities and supported bandwidths, NB-IoT and feMTC could properly support the positioning requirements. The OTDOA positioning method makes use of the measured timing of downlink signals received from multiple TPs, comprising eNBs, ng-eNBs and PRS-only TPs, at the UE. The UE measures the timing of the received signals using assistance data received from the positioning server, and the resulting measurements are used to locate the UE in relation to the neighbouring TPs. I wrote about the 5G Americas white paper titled, "The 5G Evolution: 3GPP Releases 16-17" highlighting new features in 5G that will define the next phase of 5G network deployments across the globe.

Positioning support in LTE was introduced in the second release, Rel. 9, in 2009, and improvements have been made in later releases. With today’s technology, the User Equipment (UE) position is determined based on a combination of cell identity, OTDOA and A-GNSS information from the UE.

The OTDOA positioning method makes use of the measured timing of downlink signals received from multiple TPs, comprising eNBs, ng-eNBs and PRS-only TPs, at the UE. The UE measures the timing of the received signals using assistance data received from the positioning server, and the resulting measurements are used to locate the UE in relation to the neighbouring TPs. OTDOA is a suitable positioning method candidate as it is based on broadcast signals and so enables good scalability which is required for massive IoT scenarios. Considering the different use cases, radio environments, device capabilities and supported bandwidths, NB-IoT and feMTC could properly support the positioning requirements. Observed Time Difference of Arrival (OTDOA) and enhanced Cell ID (eCID) Hybrid Methods: Hybrid-GNSS or GNSS + Mobile Radio Cellular Positioning like OTDOA Control Plane (C-Plane) and User Plane (U-Plane) session handling: LPP, SUPL 2.0 Mobile phone users expect the same Quality of Service whether they are stationary, on in its most basic form returns the position of the serving cell in the network. The e-cid technique improves this estimate by using measurements such as Round Trip Time (rtt) and Angle of Arrival (aoa).

The OTDOA positioning method makes use of the measured timing of downlink signals received from multiple TPs, comprising eNBs, ng-eNBs and PRS-only TPs, at the UE. The UE measures the timing of the received signals using assistance data received from the positioning server, and the resulting measurements are used to locate the UE in relation to the neighbouring TPs. I wrote about the 5G Americas white paper titled, "The 5G Evolution: 3GPP Releases 16-17" highlighting new features in 5G that will define the next phase of 5G network deployments across the globe. The following is from that whitepaper: Release-15 NR provides support for RAT-independent positioning techniques and Observed Time Difference Of Arrival (OTDOA) on LTE carriers. Hybrid-GNSS or GNSS + Mobile Radio Cellular Positioning like OTDOA Control Plane (C-Plane) and User Plane (U-Plane) session handling: LPP, SUPL 2.0 Mobile phone users expect the same Quality of Service whether they are stationary, on the move, in a city, or on the countryside. C. Position Estimation The OTDOA method applies multilateration to estimate the position.
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More re- The LTE Positioning Protocol (LPP) supports user Reference Signal Time Difference (RSTD) reports based on the Time of Arrival (TOA) for a Positioning Reference Signal (PRS).

(OTDOA) is a downlink based positioning method de-scribed by 3GPP as one of the NB-IoT positioning methods to increase positioning accuracy.
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terminal-assisted positioning. To enhance positioning accuracy for all types of environment, LTE uses complementary positioning methods. The main location technologies used are Observed Time Difference of Arrival (OTDOA) and Assisted Global Navigation Satellite System (A-GNSS), due to the

The OTDOA positioning method is illustrated in Figure 1-1, where the UE measures three TOA’s relative to the UE internal time base, τ 1, τ 2, and τ 3. The measurement from eNodeB 1 is selected as reference, and two OTDOA’s are formed: t 2,1 = τ 2 – τ 1 and t 3,1 = τ 3 – τ 1. eNB 1 eNB 2 eNB 3 t 3(t 1 t 2(t 1 Measurement0 u ncer tai y t 2 t 1 t 3 Positioning support in LTE was introduced in the second release, Rel. 9, in 2009, and improvements have been made in later releases.

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av K Radnosrati · 2017 · Citerat av 15 — OTDOA positioning in legacy LTE systems is widely stud- ied in the literature. For example, [6] uses real measurements and investigates channel impacts on positioning accuracy. An error analysis of OTDOA is reported in [7].

The UE can receive the signals of 3 BSs and obtain TOAs, e.g., 1 , 2 and 3 . Then thethree hyperbolic curves can be drawn by the time differences. The intersectionof the three hyperbola is the position of the UE. - "Deep Learning based OTDOA Positioning for NB-IoT Communication Systems" This white paper provides an overview of the various LTE Positioning Technologies and Protocols that will enable improved E911 and deliver the accuracy necessary for next-generation LBS and covers the following topics: LTE Positioning Technologies. ECID. OTDOA. A-GNSS. Hybrid A-GNSS and OTDOA.