Abstract
Integrated fiber-wireless (FiWi) access networks provide a powerful
platform to improve the throughput of peer-to-peer communication by enabling
traffic to be sent from the source wireless client to an ingress optical network unit (ONU),
then to the egress ONU close to the destination
wireless client, and finally delivered to the destination wireless client.
Such wireless-optical-wireless communication
mode introduced by FiWi access networks can reduce the interference in
wireless subnetwork, thus improving network throughput. With the support for
direct inter-ONU communication in the optical subnetwork, throughput of
peer-to-peer communication in a FiWi access network can be further improved.
In this paper, we propose a novel hybrid wavelength division
multiplexed/time division multiplexed passive optical network (WDM/TDM PON)
architecture supporting direct inter-ONU communication, a corresponding
decentralized dynamic bandwidth allocation (DBA) protocol for inter-ONU
communication and an algorithm to dynamically select egress ONU. The
complexity of the proposed architecture is analyzed and compared with other
alternatives, and the efficiency of the proposed system is validated by the
simulations.
© 2010 IEEE
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