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Subject: search.filters.subject.3G and 4G cellular wireless

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    Marathon monitoring and safety using ad hoc networks
    (2011-05-02)
    Sirichai, Apatcha
    ;
    Pradisathaporn, Suriya
    ;
    Kaviya, Somkuan
    ;
    Wiriyaromp, Warrachai
    ;
    Fujii, Yusaku
    This paper proposes the use of modern communication technology that sports can be different, especially, in competition, which they are difficult to track (recording) because the rules of the competition and distance cause the effects of time recording errors in terms of accuracy and impartiality. The integrated vehicular ad hoc network (VANET) is recommended to accommodate such problems. The system is integrated by a 3G or 4G cellular wireless network. By using the general packet radio service (GPRS) to monitor closely to the athletes though the route and duration of competition, where the sports safety and clarity can also be monitored and realized.
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    Hybrid surveillance system by using multi frequency bands enhancement
    (2010-09-01)
    Bunruangses, M.
    ;
    Sunat, K.
    ;
    Mitatha, S.
    ;
    Yupapin, P. P.
    We present a new design of a surveillance system via hybrid network in which is integrate wire, wireless less, Ad hoc network, vehicular Ad hoc network, sensor network, and cellular wireless network. We propose the dense wavelength division multiplexing wavelength enhancement, whereas the increasing in channel capacity and signal security can be provided. The increasing in number of channel can be obtained by the increasing in wavelength density, whereas the security is introduced by the specific wavelength filter, which is operated by the central operator. The optical communication wavelength enhancement is reviewed. The advantage is that the proposed system can be implemented and used incorporating with the existed communication link in hybrid wireless system, where the privacy can be provided, which is discussed in details. © 2010 Wiley Periodicals.