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Distributed decode-forward for multicast | IEEE Conference Publication | IEEE Xplore

Distributed decode-forward for multicast


Abstract:

A new coding scheme for multicasting a message over a general relay network is presented that extends both network coding for graphical networks by Ahlswede, Cai, Li, and...Show More

Abstract:

A new coding scheme for multicasting a message over a general relay network is presented that extends both network coding for graphical networks by Ahlswede, Cai, Li, and Yeung, and partial decode-forward for relay channels by Cover and El Gamal. For the N-node Gaussian multicast network, the scheme achieves within 0.5N bits from the capacity, improving upon the best known capacity gap results. The key idea is to use multicoding at the source as in Marton coding for broadcast channels. Instead of recovering a specific part of the message as in the original partial decode-forward scheme, a relay in the proposed distributed decode-forward scheme recovers an auxiliary index that implicitly carries some information about the message and forwards it in block Markov coding. This scheme can be adapted to broadcasting multiple messages over a general relay network, extending and refining a recent result by Kannan, Raja, and Viswanath.
Date of Conference: 29 June 2014 - 04 July 2014
Date Added to IEEE Xplore: 11 August 2014
Electronic ISBN:978-1-4799-5186-4

ISSN Information:

Conference Location: Honolulu, HI, USA

References

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