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Coding versus feedback: Hybrid ARQ protocols for the packet erasure channel

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2 Author(s)
Srinath Puducheri ; Department of Electrical Engineering, University of Notre Dame, IN 46556, USA ; Thomas E. Fuja

This paper introduces hybrid ARQ protocols for the packet erasure channel - protocols that enable tradeoffs between complexity of encoding/decoding redundant packets and the amount of feedback needed for re-transmission requests. These protocols use adaptations of Tornado codes for erasure-correction on the forward link, and rate-distortion codes on the reverse link for feeding back the status of received packets. The resulting complexity-feedback tradeoffs are shown to be substantially better (in regimes of practical interest) than a naive protocol that simply time-shares between coding-only and feedback-only approaches.

Published in:

2010 IEEE International Symposium on Information Theory

Date of Conference:

13-18 June 2010