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Lokalizowanie terminala ruchomego w sieciach LTE

Gadka P.

Przegląd Telekomunikacyjny + Wiadomości Telekomunikacyjne

2014

nr 12

1425--1429

Przedstawiono zagadnienie lokalizowania terminali ruchomych w sieciach komórkowych, architekturę, metody i główne protokoły procesu lokalizowania w sieci LTE, metodę OTDoA oraz przykładowy przepływ informacji w procesie lokalizowania terminala ruchomego

The paper introduces positioning problem in cellular networks, describes architecture, methods and main protocols for positioning purposes in LTE network. In the end, OTDoA method is elaborated in details and an example of protocors information flow is presented.

New methods for location service in the WCDMA system

Stefański J.

Electronics and Telecommunications Quarterly

2008

Vol. 54, No 1

53-66

New methods for a location service (LCS) in the Wideband Code Division Multiple Access (WCDMA) system are elaborated. These methods base on the observed time difference of arrival (OTDOA) algorithm. The classic OTDOA in the WCDMA system, to calculation of the geographical position of a mobile station (MS), needs a knowledge of relative time differences (RTDs) between base stations. In this reason, the LCS implementation is difficult and rather expensive. The proposed methods do not require RTDs. The elimination of the RTD parameters significantly simplifies the localization process in the 3G (3rd Generation) real-life cellular networks. The usefulness of the methods for location service implementation is analysed. The simulation model is outlined and simulation results of the proposed methods are presented. These results show that in the extremely bad conditions, i.e. in urban environment, the proposed algorithms fulfil the requirements for emergency calls from cellular phones in relation to accuracy of MS position calculation.