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Location-Based Services in Cellular Networks - Adrian

U-TDOA is used to locate more than 5 million callers per month. U-TDOA is also used to locate Belle AT&T users who do not know where they are in an emergency. 본 발명의 일 실시예는, 무선통신시스템에서 기지국이 OTDOA(Observed Time Difference Of Arrival) 에 관련된 동작을 수행하는 방법에 있어서, 적어도 두 개 이상의 프리코딩이 적용된 PRS(Positioning Reference Signal) 포지셔닝 occasion를 통해 PRS를 단말에게 전송하는 단계; 상기 PRS에 기초한 OTDOA 신호 측정 정보를 Figure 4-4 Principle of OTDOA positioning method TDOA is defined as follows: TDOA = OTDOA – RTD where l OTDOA indicates the time difference at the beginning of P-CPICH frames received from two cells. l RTD (relative time difference) indicates the time difference at the antenna connectors of the two cells. l TDOA indicates propagation time difference of radio signals from the two cells. measurements are only available to the serving BS. TDOA measurement is obtained by the Observed Time Di erence of Arrival (OTDOA) technology, which enables BSs send positioning reference signal (PRS) and UE measures the di erence of PRSs’ arrival time [10]. These measurements enable the 5G system to support hybrid multi-measurements positioning.

downlink OTDOA and uplink OTDOA (i.e. U-TDOA). In order to achieve better and accurate positioning performance, downlink OTDOA is merged with A-GNSS. The transmission from eNBs (i.e.

restricted to the E-CID, observed TDoA (OTDoA) and uplink TDoA (UTDoA) methods. The evolution of each of these technologies is discussed in different work items: 1) Further Enhanced MTC for LTE: The further study of E-CID and OTDoA positioningmethods for eMTC is proposed in [11].

Location-Based Services: Fundamentals and Operation: Kupper

assisted OTDOA since the UE assists the location server with RSTD measurements. hellaPHY OTDOA has identified and solved three fundamental issues with standard OTDOA: 1. hellaPHY OTDOA avoids excessive uplink RSTD transmissions; 2. hellaPHY OTDOA RSTD measurements and position estimation is tightly coupled and 8.2.1 General.

positioneringen genom att ge bla aktuell GPS Almanac och

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).

These methods have diﬀerent position accuracy and requirements, and a single method is not the best choice for every scenario. 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- of arrival (OTDOA) based positioning for Narrowband Internet of Things (NB-IoT), which will be integrated as a part of the 3rd Generation Partnership Project (3GPP) Long ermT Evolution TE) release 14. ARM Cordio-N IP for NB-IoT will provide the wide area and low power connectivity required for low-end IoT devices. In the adopted Observed Time Difference of Arrival (OTDOA) algorithm the base stations transmit so-called Positioning Reference Signals (PRS). The User Equipment (UE) detects the time difference of arrival of the PRS for pairs of base stations.
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ARM Cordio-N IP for NB-IoT will provide the wide area and low power connectivity required for low-end IoT devices. In the adopted Observed Time Difference of Arrival (OTDOA) algorithm the base stations transmit so-called Positioning Reference Signals (PRS). The User Equipment (UE) detects the time difference of arrival of the PRS for pairs of base stations. The Observed Time Difference of Arrival (OTDoA) technology defined in the 3GPP-LTE Release 9 standard is based on the Time Difference of Arrival (TDoA) method using the positioning reference The E-OTD and OTDOA-IPDL methods will then be introduced, together with the results on E-OTD trials performed during 2002, thereby closing in on the problem motivating the paper – namely the need to refine the assessment of sensitivity requirements and performance of TDOA positioning methods in cellular systems, in particular CDMA systems.

TDOA measurements based on the different pilots (includ-ing PRS), and show the achievable performance limits of the LTE system w.r.t. the FCC and 3GPP requirements. Then, we describe methods for LTE TOA and TDOA mea-surements with enhanced ﬁrst arriving path detection. The conventional maximum likelihood (ML) based correlation Localization based on time-difference-of-arrival (TDoA) is a well-known technique that serves as the basis of globally deployed positioning systems such as GPS (Global Positioning System) and 3GPP LTE OTDOA (observed time difference of arrival) [1]. In the downlink version of TDoA, of which GPS and LTE OTDOA are examples, mutually synchronized Although both U-TDOA and OTDOA methods depend on (TDOA) measurements and both are applicable to UMTS, there are major differences between them, since U-TDOA is a network based positioning method, and OTDOA is a handset based positioning method [1]. OTDOA is the earliest version standardized by 3GPP for 3G (UMTS) by the end of Difference of Arrival (OTDOA) downlink positioning technique in 4G system. OTDOA is a multilateration method in which the User Equipment (UE) measures the time of arrival (TOA) of signals received from multiple base stations (eNodeB’s).
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It is intended as a one stop guide to provide an overview of the OTDOA feature for operators and manufacturers interested in the deployment Localization based on time-difference-of-arrival (TDoA) is a well-known technique that serves as the basis of globally deployed positioning systems such as GPS (Global Positioning System) and 3GPP LTE OTDOA (observed time difference of arrival) [1]. In the downlink version of TDoA, of which GPS and LTE OTDOA are examples, mutually synchronized OTDOA for Wideband CDMA (WCDMA) Observed TDOA (OTDOA), as its name indicates, is a TDOA-based approach. It is designed to operate over wideband-code division multiple access (WCDMA) networks. Similar to the E-OTD, OTDOA uses LMUs to calibrate the downlink measurements from neighbor base stations for individual mobile users. If measure- accuracy than other available alternatives.

This leaves Uplink-TDOA and OTDOA remaining. Uplink-TDOA, set to be de ned in Release 11 as an additional 3GPP LPP technique, is the fully network-based version of OTDOA. The bene t of this technique is that it requires no modi cations to user equipment, making DL-TDOA Downlink Time Difference of Arrival E-CID Enhanced Cell ID eMBB Enhanced Mobile Broadband especially the DL-AoD and OTDOA methods. Chapter4describes the simulation setup, and the basic experimental conﬁguration and the procedure of the simulation. Chapter5validates the robust- Enhancements in LTE OTDOA Positioning for Multipath Environments. Olofsson, Ivar . Linköping University, Department of Electrical Engineering, This thesis develops and evaluates a UE reporting format representing multiple TDOA candidates, and a probabilistic positioning algorithm, 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 throug 2014-12-01 Looking for the definition of TDOA?
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Fredrik Gunnarsson - dblp

Oct 23, 2020 in legacy techniques such as TDOA) and offers additional flexibility in and Observed Time Difference Of Arrival (OTDOA) on LTE carriers. 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 TDOA measurements.

Elena Moral López - Developer - Ericsson LinkedIn

In the downlink version of TDoA, of which GPS and LTE OTDOA are examples, mutually synchronized OTDOA for Wideband CDMA (WCDMA) Observed TDOA (OTDOA), as its name indicates, is a TDOA-based approach. It is designed to operate over wideband-code division multiple access (WCDMA) networks.

OTDOA is a multilateration method in which the User Equipment (UE) measures the time of arrival (TOA) of signals received from multiple base stations (eNodeB’s). The TOAs from several neighbor eNodeB’s are subtracted from a TOA of a The goal of this project is the implementation of an efficient and accurate TDOA measurment scheme for the LTE Cat-M modem being developed in our group. The algorithm should take advantage of all available PRS while keeping computational complexity low.