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A Study on the Performance Analysis of the DOCSIS 1.1 Protocol for Digital CATV Broadcasting  

Kim Soo-Hee (경희대학교 정보통신망관리공학전공 멀티미디어전송 연구실)
Sohn Won (경희대학교 전파공학과)
Kim Young-Soo (경희대학교 전파공학과)
Hong Een-Kee (경희대학교 전파공학과)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.29, no.11A, 2004 , pp. 1253-1262 More about this Journal
Abstract
The Data Over Cable System Interface Specification (DOCSIS) protocol enables the delivery of Internet Protocol(IP) traffic over Cable TV networks with significantly higher data rates. In this paper, we assessed the performance of the DOCSIS protocol using the OPNET. The simulation can be used to predict the upstream system throughput, mean access delay and channel utilization on varying packet size and transmission stream and wid/without concatenation, and it has shown that maximum system throughput is 4.6 Mbps for channel capacity of 5.12 Mbps and packet size of 1500 bytes. The mean access delay varies depending on the offered load, and it is assumed that the offered load does not exceed the capacity of the channel. Excess offered load causes service starvation according to the assigned priority.
Keywords
DOCSIS; Upstream; Downstream; Opencable; DSG; OPNET;
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  • Reference
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