NDLI: Performance evaluation of Forward Error Correction in ATM networks

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Performance evaluation of Forward Error Correction in ATM networks

Content Provider	ACM Digital Library
Author	Biersack, Ernst W.
Abstract	If the packet loss rate in a network is higher than the loss rate requested by an application, the transport protocol must make up for the difference in loss rate. In high bandwidth delay-product networks the latency introduced by retransmission-based error recovery schemes may be too high for applications with latency constraints. In this case, Forward Error Correction (FEC) can be used. FEC allows recovery from loss without retransmission. The amount of loss recovered strongly depends on the loss behavior of the network. FEC works best if losses are dispersed in time.We use simulation to study the loss behavior of an output buffered multiplexer for three different traffic scenarios. Our results show how the loss behavior of the multiplexer is affected by the traffic mix and the statistics of the sources. The more bursty the sources, the higher the loss rate and the higher the probability that losses will occur in bursts. Based on simulation results, we develop a mathematical model for the performance of FEC and compute the effectiveness of FEC for the three traffic scenarios. FEC is not effective for the two homogeneous traffic scenarios. However, FEC reduces the loss rate for the video sources by several orders of magnitude for a heterogeneous traffic scenario consisting of video and burst sources.
Starting Page	248
Ending Page	257
Page Count	10
File Format	PDF
ISBN	0897915259
DOI	10.1145/144179.144294
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	1992-10-01
Publisher Place	New York
Access Restriction	Subscribed
Content Type	Text
Resource Type	Article

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