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). In the current reporting format, only one RSTD for each base station is considered, but for indoor environments this is easily biased due to fading and multipath issues, resulting in a Non-Line of Sight (NLOS) bias.

PDF | In this paper we investigate the positioning accuracy of user equipment ( UE) with observed time difference of arrival (OTDoA) technique in Long | Find 

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). If many bss are in range, otdoa can give a position from combined Reference Signal Time Difference (rstd) mea-surements. 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. 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. 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.

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A Kalman filter-based hybrid  Triangulation • OTDOA (Observed Time Difference Of Arrival), WCDMA • AFLT korrekt är PDE:ns (Position Determination Entity) almanac för alla basstationer? Focus is given to the different positioning technologies used in cellular networks, to cellular network native technologies, such as OTDOA / DL-TDOA, ECID,  under Fading Channels -- Performance of Enhanced LTE OTDOA Positioning 5G networks -- Green Base Station Placement for Microwave Backhaul Links  Kamiar Radnosrati;Gustaf Hendeby;Carsten. Fritsche;Fredrik Gunnarsson;Fredrik Gustafsson;. Performance of OTDOA Positioning in. Narrowband IoT Systems. GPS (Global Positioning System), USA. – GLONASS PDOP (position 3D) bör inte överstiga 4 - 5 OTDOA (Observed Time Difference Of Arrival), WCDMA.

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. 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.

Cell ID based positioning + Enhancements † Server knows the geographical locations of the cells † Timing Advance can be used to find the UE’s distance from the eNB antenna † Neighbor cell measurements etc. can be used to increase the accuracy LTE Positioning Methods- overview 3GPP Release 9 OTDOA (Observed Time Difference of Arrival)

38. 6.5.1.2. OTDOA Assistance Data Elements . The present document contains the definition of the LTE Positioning Protocol (LPP).

Observed Time Difference Of Arrival (OTDOA) is a downlink positioning method in LTE.

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 The OTDOA positioning method is illustrated in Figure1, where the UE measures three TOA’s relative to the UE internal time base, τ 1, τ 2, and τ 3.

! 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) Following are the applications of OTDOA: • It is used as positioning method in all the LTE enabled mobile phones. • 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. Observed Time Difference Of Arrival (OTDOA) is a downlink positioning method in LTE. 8.2.3 OTDOA Positioning Procedures 8.2.3.1 Capability Transfer Procedure.
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This paper is organized as follows. 10 CM Accurate Ultra-wide Band (UWB) Positioning for Arduino, Python and Raspberry Pi Projects: the Easiest Way. : Performance you can expect from this project:The video below is slightly older. Since, Pozyx has managed to increase the update rate for two-way ranging to 140 hertz and for TDOA to 400 - 1000 hertz.

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.
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Performance of OTDOA positioning in narrowband IoT systems Abstract: Narrowband Internet of Things (NB-IoT) is an emerging cellular technology designed to target low-cost devices, high coverage, long device battery life (more than ten years), and massive capacity.

LTE Positioning Protocol (LPP) Control Plane 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). In the current reporting format, only one RSTD for each base station is considered, but for indoor environments this is easily biased due to fading and multipath issues, resulting in a Non-Line of Sight (NLOS) bias. 2020-04-01 ETSI 3GPP TS 37.355 version 16.1.0 Release 16 1 ETSI TS 137 355 V16.1.0 (2020-07) Reference RTS/TSGR-0237355vg10 Keywords 5G,LTE ETSI 650 Route des Lucioles ETSI TS 136 355 V10.0.0 (2011-01) Technical Specification LTE; Evolved Universal Terrestrial Radio Access (E-UTRA); LTE Positioning Protocol (LPP) (3GPP TS 36.355 version 10.0.0 Release 10) ETSI TS 138 305 V15.0.0 (2018-09) 5G; NG Radio Access Network (NG-RAN); Stage 2 functional specification of User Equipment (UE) positioning in NG-RAN (3GPP TS 38.305 version 15.0.0 Release 15) OTDOA (Observed Time Difference Of Arrival) is a positioning feature introduced in rel9 E-UTRA (LTE radio).