DocumentCode :
778550
Title :
Delay Characterization of Cable Access Networks
Author :
Barakat, Neil ; Darcie, Thomas E.
Author_Institution :
Victoria Univ., BC
Volume :
11
Issue :
4
fYear :
2007
fDate :
4/1/2007 12:00:00 AM
Firstpage :
357
Lastpage :
359
Abstract :
This letter presents a detailed characterization of the transmission delay in cable modem (CM) access networks. We analyze data obtained from measurements on operational access networks, examining both a moderately-loaded and a heavily-loaded CM network. We find that the medium access control algorithm used in CM networks results in a multimodal delay distribution, with measured delays clustered around a few discrete values. In the heavily-loaded CM network, a significant fraction of packets experienced delays that were multiple times larger than the average. The results imply that mean delay is a poor metric for measuring the performance of CM networks, especially when the network is heavily loaded
Keywords :
access protocols; delays; modems; subscriber loops; telecommunication cables; cable modem access network; heavily-loaded CM network; medium access control algorithm; moderately-loaded CM network; transmission delay characterization; Access protocols; Bandwidth; Communication cables; Delay effects; Hybrid fiber coaxial cables; Internet telephony; Jitter; Media Access Protocol; Modems; Power cables;
fLanguage :
English
Journal_Title :
Communications Letters, IEEE
Publisher :
ieee
ISSN :
1089-7798
Type :
jour
DOI :
10.1109/LCOM.2007.348300
Filename :
4155642
Link To Document :
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