Abstract
Network coding (NC) has emerged as a promising solution to achieve higher
throughput and energy efficiency in communication networks. In this paper,
we propose an NC-based energy management mechanism for next-generation
passive optical networks (NG-PONs). The principle and signaling process of
NC in NG-PONs are discussed and an experimental emulation of NC in an
Ethernet PON (EPON) is presented by using NetFPGAs and an IEEE 802.3ah EPON
network. To achieve energy efficiency at both optical line terminal and
optical network units (ONUs) and exploit the benefits of NC on energy
efficiency and performance in NG-PONs, we propose a
downstream-bandwidth-reservation-based accurate ONU sleep control scheme and
extend it by introducing NC. The benefits of NC on the energy efficiency and
network performance are discussed and simulation results show that by
introducing NC into NG-PONs, better energy efficiency can be achieved and
the performance penalty caused by energy saving can be mitigated.
© 2012 IEEE
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