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[Author] Wei-Tsong LEE(1hit)

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  • Scheduling Delay Minimization for Non-UGS Data in Multi-Channel HFC Network

    Wei-Tsong LEE  Kuo-Chi CHU  Kun-Chen CHUNG  Jen-Yi PAN  Pau-Choo CHUNG  

     
    PAPER-Fiber-Optic Transmission for Communications

      Vol:
    E88-B No:2
      Page(s):
    623-631

    The multi-channel Hybrid Fiber Coaxial (HFC) network is essentially a shared medium with multi-channels. Its operation requires the use of a scheduling algorithm to manage the data transmission within each channel. The Data-Over-Cable Service Interface Specification (DOCSIS) protocol is an important standard for HFC networks. Since this protocol does not explicitly specify the scheduling algorithm to be used, many alternative algorithms have been proposed. However, none of these algorithms are applicable to the scheduling of non-Unsolicited Grant Service (UGS) data in multi-channel HFC networks. Accordingly, the present study develops a multi-channel scheduling algorithm which optimizes the scheduling delay time of each transmitted non-UGS request. This algorithm manages the amount of data transmission in each upstream channel according to the overall network load and the bandwidth available in each channel. This study constructs a mathematical model of the algorithm and then uses this model as the basis for a series of simulations in which the performance of the scheduling algorithm is evaluated.