Simulation model and location accuracy for observed time difference of arrival (OTDOA) positioning technique in Third Generation system

will advance E911 location accuracy utilizing a variety of technological solutions including those based on traditional latitude/longitude methods for both outdoor and indoor calls (e.g., AGNSS, OTDOA), as well as emerging next -generation solutions that would provide a “ dispatchable location” to first responders for calls made from indoors.

From the analysis we find out which OTDOA techniques with COST231-Walfisch-Ikegami path loss model has the most accuracy of location approximation with the least location error. [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 Accurate timestamping and Asymmetries • Liaison exchanged with IEEE 802.3 on the need for accurate timestamping (impact on timing performance due to Ethernet PHY) • E.g., FEC may have to be implemented and it could be a source of impairments during the PTP timestamping process (e.g., codeword insertion)

Otdoa accuracy

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). Description of the signals and procedures related to OTDOA location, as specified in 3GPP Release 9 and later, as well as in OMA. Discussion of some details relating to OTDOA which may be considered out of scope of the 3GPP/OMA standards but are needed to achieve successful deployment of OTDOA. In order to achieve better and accurate positioning performance, downlink OTDOA is merged with A-GNSS. The transmission from eNBs (i.e.

A 50 meter horizontal accuracy must be provided for 40, 50, 70, 80 % of emergency calls within 2, 3, 5, 6 years respectively. For vertical performance, operators should propose an accuracy metric within 3 years – to be approved by the commission – and comply with the metric within 6 years.

For vertical performance, operators should propose an accuracy metric within 3 years – to be approved by the commission – and comply with the metric within 6 years. With the above extensive OTDOA enhancements considered for feMTC and NB-IoT, based on the limited time-dispersion/ time-spread/ multipath EPA (Extended Pedestrian A model) 3GPP channel scenario with outdoor deployment of 1.732km ISD (Inter-Site Distance), the 50m positioning accuracy for 67% of the UEs is achievable for both device types.

OTDOA and its advantages 3GPP Release 14 further improves NB-IoT to enhance the user experience. 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.

By Methods and devices for performing hybrid fingerprinting/observed time difference of arrival (OTDOA) positioning are described. Fingerprinting information can be used to improve OTDOA results by using the fingerprinting information to generate OTDOA assistance information. turn inﬂuences the positioning accuracy. In this thesis, an OTDOA positioning simulation platform has been built. Several approaches have been implemented at transmitter side with an objective of improving positioning accuracy. The methods include generating various types of sequences, changing the original sequence One embodiment of the present invention relates to a method for performing, by a base station, observed time difference of arrival (OTDOA)-related operations in a wireless communication system, the method comprising the steps of: transmitting a positioning reference signal (PRS) to a terminal through a PRS positioning occasion to which at least two precoding processes are applied; receiving will advance E911 location accuracy utilizing a variety of technological solutions including those based on traditional latitude/longitude methods for both outdoor and indoor calls (e.g., AGNSS, OTDOA), as well as emerging next -generation solutions that would provide a “ dispatchable location” to first responders for calls made from indoors. 7.13 Cell phase synchronization accuracy (Synchronized mode of dual connectivity) 7.14 PSCell Addition and Release Delay for E-UTRA Dual Connectivity 7.15 Maximum Receive Timing Difference in Dual Connectivity 3) FACTORS INFLUENCING OTDOA ACCURACY 3.1 Measurement Geometry: The estimation geometry affects accuracy.

Furthermore, signal bandwidth, channel condition, distance from the evolved node-B, and scatterer distribution are the affecting parameters on the OTDOA accuracy. 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 In the case of providing a measurement estimation for a UAS in an urban canyon, accuracy is the most important characteristic of the estimation. This leads to A-GNSS, OTDOA, or Uplink-TDOA as the best The study found that the existing positioning, based on Observed Time Difference of Arrival (OTDOA) in LTE does meet the FCC indoor user requirements for horizontal accuracy. Location-based services and emergency call positioning drive the development of positioning in wireless networks. OTDOA it is possible to more accurately calculate a posi-tion than with one system alone. Especially in street can-yons, where receivers made for only one system have failed, performed using an R&S®SMBV100A vector signal generator with the appropriate options.
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The transmission from eNBs (i.e. Base Station) to UE (mobile phone) is called downlink while transmission from UE to eNBs is called uplink.

NB-IoT systems are also equipped with the The positioning accuracy in OTDoA methoddepends on various factors, e.g. network deployment, signal propagation conditionand properties of The study shows that reasonable horizontal position accuracy can be Detta kan vara en fördel jämfört med Observed Time Difference of Arrival (OTDoA), detta OTDOA-Based Positioning in NB-IoT.
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nique is known as observed time dierence of arrialv (OTDOA), because the device measures the arrival time of several transmitted reference signals.

The transmission from eNBs (i.e. Base Station) to UE (mobile phone) is called downlink while transmission from UE to eNBs is called uplink.

Erik linder trio

Sep 1, 2014 4.2.1.2 OTDOA. LTE OTDOA is expected to give improved performance ( accuracy and yield) compared to. CDMA AFLT for multiple reasons:.

OTDOA RMSE cumulative probability before enhancement.

One of the main factors that have an impact on the accuracy of position estimation in the OTDoA method is a propagation environment. The best accuracy could be achieved in the LoS (Line of Sight) conditions, where a signal travels directly from the source to the receiver.

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. LTE brings a promise of improved location accuracy with new positioning technologies and their integration 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 Jul 6, 2012 improve the speed and accuracy of positioning within the mobile device. Secondly Figure 3.4: OTDOA accuracy overview.

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 ). 2014-06-06 · 8 describes several factors which influence OTDOA location performance. Some of these factors are beyond vendor or operator control (such as radio propagation environment). Other factors however, can be controlled by proper OTDOA network deployment (such as proper base station synchronization and cell data base generation).