TCP/IP illustrated (vol. 1): the protocols
TCP/IP illustrated (vol. 1): the protocols
All-optical WDM multi-rings with differentiated QoS
IEEE Communications Magazine
The perspective of optical packet switching in IP dominant backbone and metropolitan networks
IEEE Communications Magazine
TDMA multiplexing of ATM cells in a residential access SuperPON
IEEE Journal on Selected Areas in Communications
The European IST project DAVID: a viable approach toward optical packet switching
IEEE Journal on Selected Areas in Communications
Congestion control mechanisms and the best effort service model
IEEE Network: The Magazine of Global Internetworking
ICCOM'08 Proceedings of the 12th WSEAS international conference on Communications
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Slotted dynamically re-configurable Metropolitan rings are viewed as a viable alternative to WDM channel overprovisioning since they allow statistical sharing between the channels. A challenge these networks are facing is to simultaneously transport both delay sensitive and best-effort traffic. In this work, a strategy for mixing up different QoS classes efficiently in a dynamically re-configurable ring is proposed. The scheme is based on explicit class reservations for the delay-sensitive first priority traffic, which are allowed to fluctuate in accordance with demand. In contrast, best effort traffic is using only any bandwidth left over by the high QoS traffic, thus exploiting the elastic behaviour of best-effort traffic and its closed loop control. The performance of the proposed mechanism is evaluated via simulations demonstrating access delay below the round trip time for high priority traffic and good overall system efficiency by filling any spare capacity with best-effort traffic, which was buffered during busy periods.