3) FACTORS INFLUENCING OTDOA ACCURACY 3.1 Measurement Geometry: The estimation geometry affects accuracy. The most broad parameter used to evaluate the effect of the geometry on the last accuracy is the Geometrical Dilution of Precision (GDOP). The GDOP is a measure of how much the position mistake that outcomes

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]. Baseline performance based on 3GPP 3D MIMO deployment and propagation model is investigated in [8]. The work in [9]

Accurate localization within an emergency call service refers to the are enhanced-CID (ECID), OTDOA and UTDOA with a target accuracy of 50 m [23]. The 5G On top of that, an OTDoA-capable UE requires the presence of highly accurate clocks, which is often not the case in low-cost IoT devices. Thus, there is a need for Jun 19, 2017 difference of arrival (OTDOA) based positioning for Narrowband Internet of 3.6 Accuracy of OTDOA-based Positioning and Previous Work . Nov 19, 2020 The main challenges and limitations are the narrow bandwidth, low power and low cost which reduces the accuracy of the time of arrival (TOA) e-mail: pyc@knu.ac.krO, kjs@knu.ac.kr*. Optimize OTDOA-based Positioning Accuracy by Utilizing. Multiple Linear Regression Model under NB-IoT Technology.

In this paper we investigate the positioning accuracy of user equipment (UE) with observed time difference of arrival (OTDoA) technique in Long Term Evolution (LTE) networks using dedicated to positioning via OTDOA method can be found in [1]. The positioning accuracy in OTDOA method depends on various factors e.g., network deployment, signal propagation condition, and properties of PRS. For 4G cellular (LTE) indoor users, positioning accuracy can be around 50 meters [2]. For upcoming 5G [1]. With this mandate the FCC has defined accuracy requirements for the different methods position estimation can be based on for county and country level, i.e. 67% of all emergency calls made on the county level need to be in a range of 50 m or less. These are quite high accuracy requirements that need to be fulfilled and guaranteed no (Accuracy level 4/5/6) (Accuracy level 4) G.811 PRC G.811.1 ePRC G.812 •Strict requirements to support OTDOA (Observed Time Difference of Arrival) 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. It utilizes neighbor cells to derive an observed time difference of arrival (ToA) relative to the serving cell.

The accuracy of the observed time difference of arrival (OTDOA) in the long-term evolution (LTE) systems depends on the accuracy of the time of arrival (TOA) measurements, which are often corrupted We then analyze and evaluate the location accuracy by using OTDOA techniques with three different path loss models such as Fixing Algorithm, COST231-Okumura-Hata and COST231-Walfisch-Ikegami. Then, the performance of these OTDOA techniques based on the three path loss models is discussed and compared according to the accuracy of location approximation.

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.

LTE brings a promise of improved location accuracy with new positioning technologies and their integration using hybrid techniques. Although established technologies such as A-GNSS (A-GPS and A-GLONASS) provides excellent performance in environments with a clear view of the sky, performance is often poor indoors, where detection of satellite signals is limited.

Nov 5, 2001 location method that gives fast response and accuracy to a fraction of cell In UMTS, the OTDOA measurements will be available in every MS

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 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]. Baseline performance based on 3GPP 3D MIMO deployment and propagation model is investigated in [8]. The work in [9] The theoretical accuracy of the TOA estimation is limited by the CRLB.

Although established technologies such as A-GNSS (A-GPS and A-GLONASS) provides excellent performance in environments with a clear view of the sky, performance is often poor indoors, where detection of satellite signals is limited. 9.3.12 TDD intra-frequency RSTD Measurement Accuracy in CE Mode B 9.4 RSTD Inter-Frequency Measurements for UE Category M1/M2 9.4.1 FDD inter-frequency RSTD Measurement Reporting Delay in CE Mode A Geofencing in 5G – “3GPP Release 15 will use LPP as a positioning protocol and support the associated positioning methods such as Global Navigation Satellite System (GNSS) and Observed Time Difference of Arrival (OTDOA)). Aug 13, 2015 In this paper we investigate the positioning accuracy of user equipment (UE) with observed time difference of arrival (OTDoA) technique in The results show a LTE OTDoA positioning accuracy better than 20 m for 50% of the cases and 63 m for 95% of the cases, using the PRS over a bandwidth of 20 Another UE-assisted method called the OTDOA has attracted more attention for providing high accuracy. In. 3GPP LTE Rel. 9, the PRS is introduced to enhance Positioning with PRS signals from 3 e-NodeBs based on OTDOA, where the ToA (τ0,0, τ1 improves the accuracy of the ToA estimation significantly. C. OTDOA The OTDOA technology is based on measurement of reference signal time To ensure the accuracy, the LTE-A standard has required that the PRS from each Neighbor cell measurements etc. can be used to increase the accuracy. LTE Positioning Methods- overview.
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Other factors however, can be controlled by proper OTDOA network deployment (such as proper base station synchronization and cell data base generation). There are two types of OTDOA viz. downlink OTDOA and uplink OTDOA (i.e. U-TDOA).

Multiple Linear Regression Model under NB-IoT Technology. on OTDoA due to the use of a dedicated downlink signal for positioning, i.e. the positioning reference signal (PRS), which is a multicarrier Orthogonal Frequency Nov 18, 2013 Indoor Accuracy by Morphology for Qualcomm.
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There are two types of OTDOA viz. downlink OTDOA and uplink OTDOA (i.e. U-TDOA). In order to achieve better and accurate positioning performance, downlink OTDOA is merged with A-GNSS. The transmission from eNBs (i.e. Base Station) to UE (mobile phone) is called downlink while transmission from UE to eNBs is called uplink.

Base Station) to UE (mobile phone) is called downlink while transmission from UE to eNBs is called uplink. • In downlink OTDOA, UE measures the downlink signals and sent back the results to network. 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. The theoretical accuracy of the TOA estimation is limited by the CRLB.

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The results show a LTE OTDoA positioning accuracy better than 20 m for 50% of the cases and 63 m for 95% of the cases, using the PRS over a bandwidth of 20

One advantage of UTDoA compared to OTDoA. (downlink) is arrival (OTDOA) is a positioning technique introduced in Release. 9 of the 3GPP LTE the accuracy which is highly beneficial for some applications, especially Jul 13, 2020 distribution of accurate time, GPS is the now-vulnerable foundation for using Observed Time Difference of Arrivals (OTDOA) and Coordinated. NR3C produces better accuracy in known conditions of multipath delays. GSM, Observed Time Difference of Arrival (OTDOA) for UMTS, uTDOA (uplink Time Oct 1, 2019 Averaging of observed time difference of arrival (OTDOA) network location estimates was found in one study to have a 60m median error, limiting users can be estimated with high accuracy (16 œ 20 m in free propagation availability enhancements to OTDOA (time alignment IPDL. (TA-IPDL) [2] Aug 6, 2014 OTDOA accuracy is 50 to 200 meters.