Focus is given to the different positioning technologies used in cellular networks, to cellular network native technologies, such as OTDOA / DL-TDOA, ECID,

LTE Mobile users positioning via OTDOA measurements: modeling and simulation May 2016 Conference: 9 ème édition Journées d’Optique et de Traitement de l’Information JOTIM'16 These positioning methods were chosen as they refer to the three hearability from at least three Node Bs. A simulation model for OTDOA based on the path loss model has been developed and is used to simulate data with fixed input parameters and the RSCP of Node Bs from field drive test. Therefore, how to enhance positioning accuracy raises great awareness and related 5G numerology design is a hot topic. Considering the determinants such as ue complexity, standardization and net-work impacts, 3GPP Release 14 [2] puts the focus on enhancements of Observed Time Di↵erence of Arrival (OTDoA) positioning. OTDoA is a ue assisted mul- Fig. 1. Illustration of the OTDOA based positioning scheme. 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.

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. 36.133 · 0433, RSTD Measurement Requirements for OTDOA 36.133 · 0726, Requirements for reporting criteria with positioning measurements .

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.

The 3GPP consortium responded to this need by enhancing its 4G communication standard (LTE) with positioning capabilities. In the adopted Observed Time Difference of Arrival (OTDOA) algorithm the base stations transmit so-called Positioning Reference Signals (PRS).

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.

positioning accuracy. 3GPP are supporting two stand-alone TDOA positioning methods (downlink and uplink) in the LTE speciﬁcation. The downlink TDOA positioning method in LTE, known as observed time-difference-of-arrival (OTDOA), measures the differences in arrival times of downlink signals from multiple 1

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. määritelmä kulkuaikaeropaikannus, jossa palvelevan tukiaseman OTDOA-Based Positioning in NB-IoT.

Therefore, how to enhance positioning accuracy raises great awareness and related 5G numerology design is a hot topic. Considering the determinants such as ue complexity, standardization and net-work impacts, 3GPP Release 14 [2] puts the focus on enhancements of Observed Time Di↵erence of Arrival (OTDoA) positioning. OTDoA is a ue assisted mul- Fig. 1. Illustration of the OTDOA based positioning scheme. 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.
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36.133 · 0433, RSTD Measurement Requirements for OTDOA 36.133 · 0726, Requirements for reporting criteria with positioning measurements . 6 Jun 2014 UE assisted positioning: the UE provides position measurements to the location server. (RSTD measurements in case of OTDOA) for computation 11 Sep 2020 Both OTDOA and joint AOA-ranging methods require accurate time delay estimation of 5G signals to improve positioning performance. Sensors LTE Positioning Technologies. ECID.

(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 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.
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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

Sensors LTE Positioning Technologies. ECID. OTDOA.

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placeringen av en Sådana system inkluderar Google Maps, liksom, LTE: s OTDOA och. Hybrid positioning systems use a combination of network-based and

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.