LTE Positioning Methods- overview. 3GPP Release 9. OTDOA (Observed Time Difference of Arrival). • UE location can be tri-laterated with the knowledge of
4 Feb 2013 This includes observed time difference of arrival (OTDOA) based methods such as PRS as well as enhanced cell ID based positioning.
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. It utilizes neighbor cells to derive an observed time difference of arrival (ToA) relative to the serving cell. 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. Introduction and Background.
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.
Home About ION wcdma (with ipdl, ta-ipdl, otdoa-pe) hybrid positioning using data fusion —not as accurate as a-gps in most —reduction of handset hardware situations (50 m) complexity —need to be visible to at least three base hybrid toa/tdoa/aoa can improve stations accuracy —requires changes in the base station —gps + cdma can improve accuracy and Techniques for supporting positioning with unclear wireless cells are described. An ambiguous cell may employ a distributed antenna system (DAS), one or more remote radio heads (RRH), repeaters, or relays, or may broadcast the same positioning reference signal (PRS) as another neighboring cell.
Deep Learning based OTDOA Positioning for NB-IoT Communication Systems Guangjin Pan, Tao Wang, Xiufeng Jiang, Shunqing Zhang guangjin_pan@shu.edu.cn, twang@shu.edu.cn, XiufengJiang@shu.edu.cn Shanghai Institute for Advanced Communication and Data Science, Key laboratory of Specialty Fiber Optics and Optical Access Networks,
Hybrid A-GNSS and OTDOA. LTE Positioning Protocol (LPP). Control Plane Positioning.
C. Position Estimation The OTDOA method applies multilateration to estimate the position. 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.
The location of a UE can be obtained OTDOA Positioning . 38. 6.5.1.2. OTDOA Assistance Data Elements .
OTDOA. A-GNSS. Hybrid A-GNSS and OTDOA. 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.
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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. OTDOA positioning in legacy LTE systems is widely studied in the literature. For example, [6] uses real mea-surements and investigates channel impacts on position-ing accuracy.
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. Then device position can be estimated by measuring the difference between the time of arrivals.
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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
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.