Research Article
Empirical Evaluation of Upstream Throughput in a DOCSIS Access Network
@INPROCEEDINGS{10.1109/MSAN.2005.1489952, author={Swapnil Bhatia and Radim Bartos and Chaitanya Godsay}, title={Empirical Evaluation of Upstream Throughput in a DOCSIS Access Network}, proceedings={1st International ICST Conference on Multimedia Services Access Networks}, publisher={IEEE}, proceedings_a={MSAN}, year={2005}, month={8}, keywords={}, doi={10.1109/MSAN.2005.1489952} }- Swapnil Bhatia
Radim Bartos
Chaitanya Godsay
Year: 2005
Empirical Evaluation of Upstream Throughput in a DOCSIS Access Network
MSAN
IEEE
DOI: 10.1109/MSAN.2005.1489952
Abstract
We present empirical measurements of the upstream throughput of a DOCSIS1 1.1 link. In contrast to all previous simulation-based studies, our measurements have been obtained from actual cable-modems (CMs) and head-ends, both from two different vendors each. We have constructed an exhaustive database of measurements of a large subset of the space of parameters affecting upstream throughput. Using a wellknown non-parametric hypothesis test, we query this database for obtaining statistically robust answers to key questions about the effect of parameter changes on the throughput. Our results indicate that for a single CM scenario, packet concatenation is most effective whereas piggybacking is effective and better than concatenation only in some cases. Using both enhancers decreases throughput for a single CM scenario. Our results are robust across head-end implementations and are of immediate interest to network and protocol architects as well as device developers.
