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| A scheduling algorithm with QoS support services in HFC |
| Wang Zhigang; Liu Lichuan; Li Lemin; Sun Hairong |
| Key Lab of Fiber Optic Communication UESTC of China Chengdu 610054 China |
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Abstract To support different QoS services in HFC, the CMTS scheduling algorithm should be analyzed carefully. However, in the most important standard-MCNS DOCSIS 1.1, no specific scheduling is prescribed, and many papers have discussed it with modified First Come First Service(FCFS). In this paper, a scheduling algorithm with QoS support-PDBQ is introduced. It distributes the priority of services by the different used bandwidth of different services. The influence of piggyback to throughput is also discussed, the performance of this algorithm is illustrated by simulation results. A method of improving link bandwidth utilization is presented in the typical delay-sensitive service of IP telephony.
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Received: 28 July 2000
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2002, Vol. 24 
