• Title/Summary/Keyword: communication networks

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Mobile Computing Algorithm on IEEE 802.11b for Ubiquitous Computing

  • Kim, Wu-Woan
    • Journal of the Korean Data and Information Science Society
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    • v.19 no.1
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    • pp.11-24
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    • 2008
  • In this paper, the patterns of movement used in the mobile communication systems are adopted in the mobile computing environment to reduce handover delay and to support seamless handover for MIPv6 based on IEEE 802.11 networks. That is, RtSolPr message and PrRtAdv message can be treated before handover. As the result, it is possible to assign NCoA to MN and Next Access Router(NAR) before handover starts. This can minimize handover delay and reduce the total handover delay.

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Field Testing of High-Speed Power Line Communications (고속 전력선통신의 현장성능 분석)

  • Kim, Sang-Jo;Lee, Byung-Gu;Kim, Geun-Young;Kim, Sok-Ho
    • 한국정보통신설비학회:학술대회논문집
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    • 2009.08a
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    • pp.227-230
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    • 2009
  • In this paper, the results of field testing of high-speed power line in-home networking in Korea are reported. When multiple networks share a common channel, they can interfere destructively and reduce system capacity. This is major problem in-home power line communications, especially in MDU deployments. The effects of neighboring network interference in power line communications are reported.

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Home Gateway Architecture for Realtime Multimedia Distribution in Home Networking (실시간 멀티미디어의 분배를 위한 홈게이트웨이 구조)

  • 이동욱;이철호;한상우;김종원;조충래;전용일
    • Proceedings of the IEEK Conference
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    • 2003.11a
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    • pp.509-512
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    • 2003
  • On-going convergence between broadcasting and communication is currently bringing in lots of drastic changes to multimedia services to the home. The FTTH-based home networks will be the interface among the digital home appliances for broadcast digital contents as weil as for broadband data connection. In this paper, we discuss several design issues for home gateway architecture that effectively distributes realtime broadcasting contents (from either the headend in the access network or the satellite/terrestrial broadcasts) to heterogeneous devices in the home network.

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PERFORMANCE ANALYSIS OF A MULTIPLEXER WITH THE THRESHOLD BASED OVERLOAD CONTROL IN ATM NETWORKS

  • Park, Chul-Geun
    • Journal of applied mathematics & informatics
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    • v.5 no.3
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    • pp.643-658
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    • 1998
  • In this paper we analyze the performance of a statistical ATM multiplexer with bursty input traffic and two thresholds in the buffer by using queueing model. Two priority levels are considered for source traffic which is modeled by Markov Modulated Poisson Process to represent the bursty characteristics. Service time distributions of two priority sources are assumed to be same and deterministic for ATM environment. The partial buffer sharing scheme with one threshold may experience a sensitive state change around the threshold. But the proposed multiplexer with two thresholds avoids this hysterical phenominon to improve the system operation.