Title :
Cognitive indoor positioning in TV White Spaces
Author :
Caso, Giuseppe ; De Nardis, Luca ; Ferrante, Augusto ; Di Benedetto, Maria-Gabriella
Author_Institution :
DIET Dept., Sapienza Univ. of Rome, Rome, Italy
Abstract :
Recent evolution in regulation of access to TV channels allocated in UHF frequencies (DVB-T) makes vacant channels (TV White Spaces - TVWS) available to wireless data services. While this opportunity is currently widely studied by the cognitive radio community for communications, the use of TVWS for indoor positioning is all but unexplored. Frequencies below 900 MHz are extremely appealing for positioning due to a more uniform signal propagation with respect to the ISM bands and a lower attenuation when passing through obstacles. This work focuses indeed on indoor positioning in the TVWS. A TVWS positioning system is proposed and compared against WiFi-based solutions, in terms of energy efficiency, operating range, and impact of network topology. Moreover, the formulation of a cognitive paradigm for optimal selection of the topology of Access Points and of network topology in a TVWS communication and positioning system is given. The proposed algorithm takes into account constraints related to positioning accuracy and communication performance. Results obtained analytically and by simulation show that favorable propagation conditions characterizing the TVWS frequencies, in conjunction with an optimized system organization and topology, lead to highly accurate positioning and improved energy efficiency over traditional schemes, thanks to lower transmit power levels. The proposed solution is therefore also appealing in light of recent trends towards green wireless communications.
Keywords :
cognitive radio; digital video broadcasting; energy conservation; indoor communication; radiowave propagation; telecommunication channels; telecommunication network topology; television; wireless LAN; DVB-T; ISM bands; TV channels; TV white spaces; TVWS communication system; TVWS frequencies; TVWS positioning system; UHF frequencies; WiFi-based solutions; access points topology; cognitive indoor positioning; cognitive paradigm; cognitive radio community; energy efficiency; green wireless communications; network topology; propagation conditions; uniform signal propagation; wireless data services; Distance measurement; Europe; IEEE 802.11 Standards; TV; Uncertainty; Vectors; White spaces;
Conference_Titel :
Indoor Positioning and Indoor Navigation (IPIN), 2013 International Conference on
Conference_Location :
Montbeliard-Belfort
DOI :
10.1109/IPIN.2013.6817905