We propose a piggybacking scheme for network coding where strong source inputs piggyback the weaker ones, a scheme necessary and sufficient to achieve the cut-set upper bound at high/low-snr regime, a new asymptotically optimal operational regime for the multihop Amplify and Forward (AF) networks.
@article{arxiv.1704.05916,
title = {Piggybacking Codes for Network Coding: The High/Low SNR Regime},
author = {Samah A. M. Ghanem},
journal= {arXiv preprint arXiv:1704.05916},
year = {2017}
}