Performance Analysis of a Bandwidth Guaranteed Medium Access Control Protocol for WDM Local Networks

Performance Analysis of a Bandwidth Guaranteed Medium Access Control Protocol for WDM Local Networks In this paper, we propose and analyze a bandwidth guaranteed medium access control protocol for broadcast-and-select WDM local networks with a star topology. The proposed protocol is based on a combination of contention and dedicated reservation mechanisms for time slotted WDM networks. Every node accesses the data channel by transmitting request packets in minislots on a separate control channel. There are two types of minislots; dedicated minislots and contention minislots. Nodes requiring bandwidth guarantees, called guaranteed nodes, use dedicated minislots that are assigned by the centralized control node. The remaining nodes, called random-access nodes, share contention minislots using a distributed random access mechanism. The dedicated minislots can guarantee a minimum bandwidth for the guaranteed nodes. The contention minislots enable on-demand services at the optical layer and achieve good fairness for the remaining bandwidth. Here, the data channels are dynamically assigned to the minislots successfully returned on a first-come-first-served (FCFS) basis. This protocol can combine the best of centralized and distributed access protocols such as simplicity, efficiency, and flexibility. We analyze the maximum throughput and verify the results by simulation. Photonic Network Communications Springer Journals

Performance Analysis of a Bandwidth Guaranteed Medium Access Control Protocol for WDM Local Networks

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Kluwer Academic Publishers
Copyright © 2003 by Kluwer Academic Publishers
Computer Science; Computer Communication Networks; Electrical Engineering; Characterization and Evaluation of Materials
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