Access protocols for an efficient and fair packet-switched IP-over-WDM metro network

Authors:
Kemal Bengi
Affiliations:
European Patent Office, Landsbergerstrasse 30, D-80335 Munich, Germany and Institute of Communication Networks, Vienna University of Technology, Favoritenstrasse 91388, A-1040 Vienna, Austria
Venue:
Computer Networks: The International Journal of Computer and Telecommunications Networking
Year:
2004

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Abstract

This paper proposes novel distributed medium access protocols for a time-slotted WDM metro ring employing optical packet switching and supporting variable-length data packets such as IP datagrams directly in the optical layer. A scalable multi-hop WDM ring is considered, where much more nodes than available wavelengths may be accommodated in the network. In the underlying control-channel based architecture, each node is equipped with three transmitters (two fixed-tuned and one tunable) and two fixed-tuned receivers. The new access control scheme relies on a frame-based slot reservation strategy including reservation of successive slots for data packets longer than the given slot size, and immediate access for packets shorter than the slot length. Thus, a highly efficient IP-over-WDM metro network with simple receiver hardware is obtained.