A Wireless Location System in LTE Networks

Personal location technologies are becoming important with the rapid development of Mobile Internet services. In traditional cellular networks, the key problems of user location technologies are high-precision synchronization among different base stations, inflexible processing resources, and low ac...

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Bibliographic Details
Published in:Mobile information systems 2017-01, Vol.2017 (2017), p.1-11
Main Authors: Liu, Qi, Liu, Shan, Hu, Rongyi
Format: Article
Language:English
Subjects:
Algorithms
Antennas
Cellular communication
Computer simulation
Indoor environments
Mobile communication systems
Position (location)
Reference signals
Synchronism
Wireless communications
Wireless networks
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Summary:Personal location technologies are becoming important with the rapid development of Mobile Internet services. In traditional cellular networks, the key problems of user location technologies are high-precision synchronization among different base stations, inflexible processing resources, and low accuracy positioning, especially for indoor environment. In this paper, a new LTE location system in Centralized Radio Access Network (C-RAN) is proposed, which makes channel and location measurement more available, allocation of baseband processing resources more flexible, and location service capability opening. The location system contains more than two antenna clusters, and each of them gets time-difference-of-arrival (TDOA) of sounding reference signals (SRSs) from different antennas. Then, based on data provided by location measurement units (LMUs), the location information server calculates TDOAs and derives the users’ position. Furthermore, a new location algorithm is raised which can achieve distributed antennas collaboration and centralized location computing. And an improved optimized algorithm with the best TDOA selection is proposed. Finally, simulations are given out to verify the efficiency of the proposed algorithm in this LTE location system.
ISSN:1574-017X
1875-905X
DOI:10.1155/2017/6160489