A simulation study of two-level forward error correction for lost packet recovery in B-ISDN/ATM

Date

1993

Authors

Oğuz, Nihat Cem
Ayanoğlu, E.

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Abstract

The major source of errors in B-ISDN/ATM systems is expected to be buffer overflow during congested conditions, resulting in lost packets. A single lost or errored ATM cell will cause retransmission of the entire packet data unit (PDU) that it belongs to. The performance of the end-to-end system can be made much less sensitive to cell loss by means of forward error correction. In this paper, we present the results of a simulation study for an ATM network where forward error correction is performed at both the cell level and the PDU level. The results indicate that (i) cell losses are highly correlated in time, and analytical models ignoring this fact will not yield accurate results, (ii) the correlation of cell losses is similar to burst errors in digital communication, and similar code interleaving techniques should be used, (iii) coding cells and PDUs separately provides this interleaving effect, and this joint code outperforms coding only at the cell level or only at the PDU level in almost all cases simulated.

Source Title

Proceedings of the IEEE International Conference on Communications, ICC 1993

Publisher

IEEE

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Keywords

Correlation methods, Error correction, Packet switching, Redundancy, Reliability, Telecommunication networks, Asynchronous transfer mode, Automatic repeat request, Buffer overflow, Burstiness, Cell losses, Code interleaving technique, Lost packet recovery, Packet data unit, Parity cells, Two level forward error correction, Voice/data communication systems

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Published Version (Please cite this version)

Language

English

Type

Conference Paper