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Performance Evaluation and Design of Upstream Scheduling Algorithms To Support Channel Bonding  

Roh, Sun-Sik (Dept. Information and Communication, Gwangju University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea TC / v.46, no.5, 2009 , pp. 8-18 More about this Journal
Abstract
CableLAB published DOCSIS 3.0 Specifications to supply broadband access to homes and small businesses. The primary technique of DOCSIS 3.0 Specification is channel bonding which provides cable operators with a flexible way to significantly increase up/downstream speeds. In this paper, we propose the upstream scheduler that serves channel bonding. Proposed scheduler consists of two sub-scheduler: bonding group scheduler and channel scheduler. Also, we propose three scheduling algorithms to allocate request bandwidth of CM to each bonding channel: equivalent scheduling algorithm, current request-based scheduling algorithm, and last grant-based scheduling algorithm. In order to evaluate the performance of these algorithms and DOCSIS 3.0 MAC protocol, we develop the DOCSIS 3.0 simulator with the network simulator, OPNET, to model DOCSIS network, CMTS, and CM. Our results show that equivalent scheduling algorithm is superior to others in the view of transmission delay and throughput and DOCSIS 3.0 protocol provides higher throughput than pre-DOCSIS 3.0 protocol.
Keywords
DOCSIS; Channel Bonding; Upstream Scheduling; Cable Network;
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  • Reference
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