NR3C produces better accuracy in known conditions of multipath delays. GSM, Observed Time Difference of Arrival (OTDOA) for UMTS, uTDOA (uplink Time

Aug 11, 2014 Wireless E911 Location Accuracy Requirements, PS Docket No. Even 4G LTE Observed Time Difference of Arrival (“OTDOA”) technology will

Elements in the OTDOA Neighbour Cell Info element are provided relative to this reference cell. 2. OTDOA Neighbour Cell Info: This element contains parameters for each of the Difference of Arrival (OTDOA) measurements. Reference Signal Time Difference (RSTD) reports are simulated to be sent to the mobile location center periodically or on an on-demand basis. We investigate the possibility of optimizing the number of reports per minute budget on horizontal positioning accuracy using an on-demand reporting method 2016-06-29 · Abstract: 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 corrupted by various errors caused by non-light-of-sight propagation, multipath interference, noise, and path detection techniques. nique is known as observed time dierence of arrialv (OTDOA), because the device measures the arrival time of several transmitted reference signals.

These are quite high accuracy requirements that need to be fulfilled and guaranteed no (Accuracy level 4/5/6) (Accuracy level 4) G.811 PRC G.811.1 ePRC G.812 •Strict requirements to support OTDOA (Observed Time Difference of Arrival) 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. respect to A-GNSS and network based methods (OTDOA / enhanced cell ID), also while simulating extreme conditions. Over-the-air (OTA) measurements verify if a terminal offers adequate sensitivity in any spatial orientation. The minimum performance measurement checks the accuracy and duration of the positioning operation.

Automatic probe-fit check and in-ear calibration for increased accuracy; Easy- to-interpret colorful DPGrams and detailed information for each frequency tested

The theoretical accuracy of the TOA estimation is limited by the CRLB. In this section, we compute the CRLB of TOA estimation for the OFDM- based LTE signal. Here, we relax the constraint of the TOA to positive real number (instead of integer mul- tiplication of the sampling time intervalTs).

respect to A-GNSS and network based methods (OTDOA / enhanced cell ID), also while simulating extreme conditions. Over-the-air (OTA) measurements verify if a terminal offers adequate sensitivity in any spatial orientation. The minimum performance measurement checks the accuracy and duration of the positioning operation.

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.

a-gnss gives proper position accuracy but require good reception from satellites, which might not be the case in dense urban areas or indoor environ- OTDOA positioning in legacy LTE systems is widely stud-ied in the literature. For example, [6] uses real measurements and investigates channel impacts on positioning accuracy.
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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). There are two types of OTDOA viz.

Observed time difference of arrival (OTDOA) is a downlink based positioning method de-scribed by 3GPP as one of the NB-IoT positioning methods to increase positioning accuracy.
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OTDOA accuracy is 50 to 200 meters. LTE brings a promise of improved location accuracy with new positioning technologies and their integration using hybrid techniques. Although established technologies such as A-GNSS (A-GPS and A-GLONASS) provides excellent performance in environments with a clear view of the sky, performance is often poor indoors, where detection of satellite signals is limited.

With the enhancement given to the OTDOA technique by adding the adaptive filter- ing process (A-OTDOA) method it is clearly shown by figure 6 and table 2 that the accuracy has reached significantly high levels even for the worst case scenario with the Nakagami-m fading channel. OTDOA accuracy is 50 to 200 meters. LTE brings a promise of improved location accuracy with new positioning technologies and their integration using hybrid techniques. Although established technologies such as A-GNSS (A-GPS and A-GLONASS) provides excellent performance in environments with a clear view of the sky, performance is often poor indoors, where detection of satellite signals is limited. 9.3.12 TDD intra-frequency RSTD Measurement Accuracy in CE Mode B 9.4 RSTD Inter-Frequency Measurements for UE Category M1/M2 9.4.1 FDD inter-frequency RSTD Measurement Reporting Delay in CE Mode A Geofencing in 5G – “3GPP Release 15 will use LPP as a positioning protocol and support the associated positioning methods such as Global Navigation Satellite System (GNSS) and Observed Time Difference of Arrival (OTDOA)). Aug 13, 2015 In this paper we investigate the positioning accuracy of user equipment (UE) with observed time difference of arrival (OTDoA) technique in The results show a LTE OTDoA positioning accuracy better than 20 m for 50% of the cases and 63 m for 95% of the cases, using the PRS over a bandwidth of 20 Another UE-assisted method called the OTDOA has attracted more attention for providing high accuracy. In. 3GPP LTE Rel. 9, the PRS is introduced to enhance Positioning with PRS signals from 3 e-NodeBs based on OTDOA, where the ToA (τ0,0, τ1 improves the accuracy of the ToA estimation significantly.

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.

nique is known as observed time dierence of arrialv (OTDOA), because the device measures the arrival time of several transmitted reference signals. In this paper we investigate the positioning accuracy of user equipment (UE) with observed time difference of arrival (OTDoA) technique in Long Term Evolution (LTE) networks using dedicated to positioning via OTDOA method can be found in [1]. 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 [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.

Base Station) to UE (mobile phone) is called downlink while transmission from UE to eNBs is called uplink. • In downlink OTDOA, UE measures the downlink signals and sent back the results to network. Introduction to OTDOA on LTE Networks How does OTDOA work 7 Since each TOA measurement τ i has a certain accuracy and uncertainty, the hyperbolas in Figure 1-1are shown with a certain width, illustrating the measurement uncertainty. The theoretical accuracy of the TOA estimation is limited by the CRLB. In this section, we compute the CRLB of TOA estimation for the OFDM- based LTE signal. Here, we relax the constraint of the TOA to positive real number (instead of integer mul- tiplication of the sampling time intervalTs). Abstract and Figures In this paper we investigate the positioning accuracy of user equipment (UE) with observed time difference of arrival (OTDoA) technique in Long Term Evolution (LTE) networks 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.