RT info:eu-repo/semantics/article
T1 Fulcrum: Flexible Network Coding for Heterogeneous Devices
A1 Lucani, Daniel E.
A1 Pedersen, Morten Videbæk
A1 Ruano Benito, Diego
A1 Sørensen, Chres W.
A1 Fitzek, Frank H. P.
A1 Heide, Janus
A1 Geil, Olav
A1 Nguyen, Vu
A1 Reisslein, Martin
K1 Decoding probability
K1 Probabilidad de decodificación
K1 Random linear network coding
K1 Codificación de red lineal aleatoria
K1 Throughput
K1 Tasa de transferencia efectiva
AB We introduce Fulcrum, a network coding framework that achieves three seemingly conflicting objectives: 1) to reduce the coding coefficient overhead down to nearly n bits per packet in a generation of n packets; 2) to conduct the network coding using only Galois field GF(2) operations at intermediate nodes if necessary, dramatically reducing computing complexity in the network; and 3) to deliver an end-to-end performance that is close to that of a high-field network coding system for high-end receivers, while simultaneously catering to low-end receivers that decode in GF(2). As a consequence of 1) and 3), Fulcrum has a unique trait missing so far in the network coding literature: providing the network with the flexibility to distribute computational complexity over different devices depending on their current load, network conditions, or energy constraints. At the core of our framework lies the idea of precoding at the sources using an expansion field GF(2 h ), h > 1, to increase the number of dimensions seen by the network. Fulcrum can use any high-field linear code for precoding, e.g., Reed-Solomon or Random Linear Network Coding (RLNC). Our analysis shows that the number of additional dimensions created during precoding controls the trade-off between delay, overhead, and computing complexity. Our implementation and measurements show that Fulcrum achieves similar decoding probabilities as high field RLNC but with encoders and decoders that are an order of magnitude faster.
PB IEEE Xplore
SN 2169-3536
YR 2018
FD 2018
LK http://uvadoc.uva.es/handle/10324/40735
UL http://uvadoc.uva.es/handle/10324/40735
LA eng
NO IEEE Access, 2018, vol. 6. p. 77890-77910
NO Producción Científica
DS UVaDOC
RD 25-abr-2024