Vongchumyen, Charoen

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Vongchumyen, Charoen
Alternative Name
Vongchumyen, C.
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Email
charoen.vo@kmitl.ac.th

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    Item type:Publication,
    Dark-soliton multiplexing system for high-capacity and -security communication within a wavelength router
    (2010-05-01)
    Vongchumyen, Charoen
    ;
    Kulsirirat, Kathawut
    ;
    Mitatha, Somsak
    ;
    Yupapin, Preecha P.
    We propose a novel system for generating multiplexed dark-soliton pulses using multiple light sources via an optical multiplexer, whereby dark solitons with different center wavelengths can be generated. The multiplexed signals can be transmitted into the communication link and filtered by using an optical add-drop filter. By using suitable simulation parameters, we have shown that dark solitons with different center wavelengths can in fact be obtained. In application, the communication capacity can be increased by using the multiplexed dark solitons; moreover, the transmission signals can be secured by utilizing the behavior of dark solitons. A free spectrum range (FSR) 2.5 nm and an amplified power of 30 W of dark solitons with wavelength 1.60 μm can be achieved. Channel spacing of the communication signals within a wavelength router can be provided by using a suitable FSR, which can be managed by using crosstalk effect analysis. © 2010 Society of Photo-Optical Instrumentation.
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    The design of the domain name system with workload distribution system anycast DNS type for UniNet in Thailand
    (2019-07-01)
    Laomuad, Sattra
    ;
    Chansuttirangkool, Manutsiri
    ;
    Lekdee, Kriangsak
    ;
    Soysouvanh, Saysamone
    ;
    Vongchumyen, Charoen
    This paper proposes the design of recursive Anycast DNS service system using as a replacement for the original unicast DNS service system that the UniNet Network is active and having problems supporting the volume of client traffic that has a large number of educational institutions. In order to increase the efficiency of providing services to clients of educational institutions. The designing from setting up the server host in various node and the designing the server connected to a suitable network for routing protocol has been proposed, including designing an emergency backup system that regards to compatibility with current network systems and the use of the original unicast DNS system to be useful. As a result of testing the designed system, it was found that the Query time of the new system was 2 times less than that of the original system for query IPv4, and 5 times less than that of the original system for query IPv6. Anycast DNS system that was installed can support the amount of DNS Query more 15 times than the original unicast DNS system.