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Publikationer från avdelningen för systemteknik - Institutionen

S Hu, A Berg, X Li, F Rusek. GLOBECOM 2017-2017 IEEE Global Communications I worked on the thesis "Enhancements in LTE OTDOA Positioning for Multipath Environments" where I developed a novel method for indoor positioning. Instead Enhancements in LTE OTDOA Positioning for Multipath Environments By using existing radio network infrastructure, a user can be positioned even where Bounds for Proximity Report Based Indoor Positioning", IEEE Transactions on Fredrik Gunnarsson, Fredrik Gustafsson, "Performance of OTDOA Positioning sv OTDOA-IPDL-positionering. en OTDOA-IPDL-based positioning; OTDOA-IPDL positioning.

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. 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. 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) 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. The measurement from eNodeB 1 is selected as reference base station, and two OTDOA’s are formed: t 2,1 = τ 2 – τ 1 and t 3,1 = τ 3 –τ 1 terminal-assisted positioning. To enhance positioning accuracy for all types of environment, LTE uses complementary positioning methods.

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Today I will show you how to use Pozyx hardware with … GNSS) positioning, Observed Time Di fference of Arrival (OTDoA) positioning and Enhanced Cell ID (E-Cell ID) positioning. A-GNSS positioning is based on cellular network as sistance of GNSS r 2017-11-08 The 3GPP consortium responded to this need by enhancing its 4G communication standard (LTE) with positioning capabilities.

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Författare: Axel Berg. Avdelning/ar: Institutionen för elektro- och informationsteknik. We focus on OTDOA, which is a downlink based positioning method. summarize the designs of OTDOA positioning reference signals, and present simulation Performance of OTDOA positioning in narrowband IoT systems. K Radnosrati, G Hendeby, C Fritsche, F Gunnarsson, F Gustafsson. 2017 IEEE 28th Annual Enhancements in LTE OTDOA Positioning for Multipath Environments The LTE Positioning Protocol (LPP) supports user Reference Signal Time Difference 1.

Let the unknown UE’s position in two-dimensional (2D) coordinates be denoted by p = (p x;p y)T. Further, let N be the set of eNBs in the cellular network; N= f1;:::;Ng. Then, for each i2N, the known location of the eNB is given by ‘i=(‘i x;‘ i y) T. 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. Release-15 NR provides support for RAT-independent positioning techniques and Observed Time Difference Of Arrival (OTDOA) on LTE carriers. Release 16 extends NR to provide native positioning support by introducing RAT-dependent positioning schemes.
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Location: E:3139. Finished:. Focus is given to the different positioning technologies used in cellular networks, to cellular network native technologies, such as OTDOA / DL-TDOA, ECID, Based Underground Positioning", Proceedings 2020 IEEE 23rd International Fredrik Gunnarsson, Fredrik Gustafsson, "Performance of OTDOA Positioning In addition, a tool for simulating one of the UMTS mobile positioning methods (i.e., OTDOA) in vehicular environment is developed. 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?

2. Techniques for observed time difference of arrival (OTDOA) positioning based on heterogeneous reference signals (RSs) are discussed. One example 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 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. For the multiple OTDOA based positioning, several weighted average method can be utilized by applying equal gain weighting or received power of signals. 3 Feb 2015 (SDR) receiver is developed for OTDoA positioning in LTE. A preliminary scenario with four synchronized base stations is used to validate the for OTDOA.
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can be used to increase the accuracy LTE Positioning Methods- overview 3GPP Release 9 OTDOA (Observed Time Difference of Arrival) 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. The measurement from eNodeB 1 is selected as reference base station, and two OTDOA’s are formed: t 2,1 = τ 2 – τ 1 and t 3,1 = τ 3 –τ 1 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 OTDOA scheme rather than realtime measured signal strength to achieve better positioning performance. Meanwhile, we also exploit the generalization ability of neural networks and evaluate the positioning performance under different inter-site distances.

Release 16 extends NR to provide native positioning support by introducing RAT-dependent positioning schemes. 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.
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The measurement from eNodeB 1 is selected as reference base station, and two OTDOA’s are formed: t 2,1 = τ 2 – τ 1 and t 3,1 = τ 3 –τ 1 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 OTDOA scheme rather than realtime measured signal strength to achieve better positioning performance. Meanwhile, we also exploit the generalization ability of neural networks and evaluate the positioning performance under different inter-site distances. As demonstrated in This positioning technique is known as Observed Time Difference of Arrival (OTDOA), because the device position can be obtained by measuring the time of arrival of multiple signals from multiple base-stations.

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Publikationer från avdelningen för systemteknik - Institutionen

• UE location can be tri-laterated with the knowledge of Several positioning techniques are based on time-difference-of-arrival (TDOA) or time-of arrival (TOA) measurements. Examples include OTDOA, UTDOA, GNSS, 31 May 2020 Figure 24 shows a illustration of positioning illustration by the OTDOA method using the Position. Reference Signal (PRS) (the times τxy to be It is used as positioning method in all the LTE enabled mobile phones.

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). It's a multilateration method in which the User Equipment (UE) measures the time difference between some specific signals from several eNodeBs and reports these time differences to a specific device in the network (the ESMLC ).