Publication No 36394

Author(s)

Hu, G.*; Gauger, C.M.*; Junghans, S.*

Title

Performance of MAC Layer and Fairness Protocol for the Dual Bus Optical Ring Network (DBORN)

Topics

Local and Metropolitan Area Networks

Methods

Protocol Engineering; Performance Evaluation

Keywords

MEDIA ACCESS CONTROL; MAN; FAIRNESS; PERFORMANCE EVALUATION

Abstract

DBORN (Dual Bus Optical Ring Network) is a network architecture for wavelength division multiplexing metropolitan area networks. In DBORN, metro clients like enterprise networks are connected to the optical metro-ring by edge nodes which share the wavelength channels on the ring. In order to allow for a high-speed optical interface on the upstream wavelengths while avoiding active optical switching components, a carrier sense multiple access/collision avoidance (CSMA/CA) medium access control (MAC) protocol is realized. A Fairness protocol so-called TCARD was proposed to tackle with the positional priority problem and provide guaranteed QoS. In this paper, the MAC protocol and the closely related transmitter interface are described first. Then, the performance of the MAC protocol is evaluated with respect to important system parameters like slotted/unslotted operation mode, burst size distribution and node position in terms of the mean waiting time as well as the node-to-hub delay. The performance of TCARD is inspected through simulations with respect to different parameter settings. Based on the original TCARD protocol in asynchronous unslotted operation mode, we also introduce slotted TCARD for the slotted operation mode and obtain outstanding performance gains.

Year

2005

Reference entry

Hu, G.; Gauger, C.M.; Junghans, S.
Performance of MAC Layer and Fairness Protocol for the Dual Bus Optical Ring Network (DBORN)
Proceedings of the 9th Conference on Optical Network Design and Modelling (ONDM 2005), Milan, February 2005, pp. 467-476

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