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The performance of simple error control protocols under correlated packet losses

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2 Author(s)
Pieris, G.R. ; Dept. of Electr. & Comput. Eng., Texas Univ., Austin, TX, USA ; Sasaki, G.H.

A study is made of the effect of correlated packet losses for some simple automatic repeat request (ARQ) protocols: go-back-∞, and Blast. The packet losses are modeled by a two state Markov chain and it is assumed that the round trip delay is random. Expressions are derived for the z-transform and the first and second moments of the time [τ], taken to successfully transmit N packets for go-back-∞ and variations of the Blast protocol. For go-back-∞, bounds are derived for E[τ], and it is shown that for a fixed mean round trip delay, E[τ] is minimized when the distribution of the round trip delay is such that its variance is minimized. Some of the protocols investigated show a significant improvement in performance when packet losses occur in bursts. The authors propose and analyze a variation of the Blast protocol which seems particularly suited to bursty packet loss situations

Published in:

INFOCOM '91. Proceedings. Tenth Annual Joint Conference of the IEEE Computer and Communications Societies. Networking in the 90s., IEEE

Date of Conference:

7-11 Apr 1991