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Decoding delay reduction in broadcast erasure channels with memory for network coding

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2 Author(s)
Karim, M.S. ; Res. Sch. of Eng., Australian Nat. Univ. (ANU), Canberra, ACT, Australia ; Sadeghi, P.

This paper studies feedback based instantly decodable network coding with the aim of minimizing decoding delay per transmission over wireless broadcast erasure channels with memory. We model such channels with a Gilbert-Elliott two-state Markov model with good and bad states. We first present a weighted sum generalized instantly decodable network coding (G-IDNC) scheme, where the aim is to service a subset of receivers with expected good channel state. We then propose an improved variation of the weighted sum G-IDNC that appropriately targets a broader set of receivers (while giving initial priority to receivers with expected good channel state) to reduce decoding delay over a wider range of erasure channels with memory. Simulation results show that our proposed improved weighted sum G-IDNC algorithm always considerably outperforms an earlier approach in the literature for erasure channels with memory, namely the weighted sum strict instantly decodable network coding (S-IDNC).

Published in:

Personal Indoor and Mobile Radio Communications (PIMRC), 2012 IEEE 23rd International Symposium on

Date of Conference:

9-12 Sept. 2012

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