Multiwavelength Optical LANs

Papadimitriou, Georgios I.; Tsimoulas, P.A.; Obaidat, Mohammad S.; Pomportsis, A.S.

doi:10.1002/0470871644

Cited by 25 publications

(21 citation statements)

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“…Indeed, in order to draw conclusions for the functionality of a MAC protocol, we should refer to the kinds of collisions that appear in WDM Broadcast-and-Select networks under examination. There are two kinds of collisions, under investigation [13]: (a) channel collision and (b) receiver collision. The first kind appears when two or more nodes try to transmit within the same wavelength simultaneously.…”

Section: Categorization Of Mac Protocolsmentioning

confidence: 99%

CS-POSA: A High Performance Scheduling Algorithm for WDM Star Networks

2006

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In this paper a new packet scheduling algorithm for WDM star networks is introduced. The protocol adopted is pre-transmission coordination-based and packet collisions have been eliminated due to predetermination of the timeslots each node transmits in a demand matrix. The requests of the transmitted packets are predicted through Markov chains in order to reduce the calculation time of the final scheduling matrix. This is accomplished by pipelining the schedule computation. The innovation that this algorithm introduces is to modify the service sequence of the node. The proposed algorithm is studied via extensive simulation results and it is proved that changing the sequence that nodes transmit, from the node with the largest number of requests to the node with the fewest requests, that there is an increase in the throughput of the network, with a minimum (almost zero) cost in mean time delay and in delay variance.

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Section: Categorization Of Mac Protocolsmentioning

confidence: 99%

CS-POSA: A High Performance Scheduling Algorithm for WDM Star Networks

2006

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“…In order to utilize in the best way the optical technology we need an appropriate multiplexing technique. Wavelength division multiplexing (WDM) seems to control the area of the multiplexing, since WDM offers an excellent way of exploiting the huge bandwidth of optical fibers, by introducing concurrency among multiple users transmitting at feasible rates [3,4]. Such a network consists of one optical N×N passive star coupler and N nodes.…”

Section: Introductionmentioning

confidence: 99%

SASA: A Synthesis Scheduling Algorithm with Prediction and Sorting Features

Sarigiannidis

Papadimitriou

Pomportsis

2006

11th IEEE Symposium on Computers and Communications (ISCC'06)

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“…Detailed descriptions of the main parameters, design issues, and categories of MAC protocols, along with an allembracing survey of the vast relevant literature, can be found in [7].…”

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confidence: 99%

An Intelligent Global Message Prioritization Algorithm for High-Performance Scheduling in WDM Star Networks

2009

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In this article we propose the Minimization of Probability and Size of scheduling Latency (MinPSL) protocol for remarkably efficient load balancing and scheduling of variable length messages in WDM star networks. Our EMPS protocol has been shown to noticeably increase the performance of practical networks with non-uniform destinations and non-negligible transceiver tuning latencies, while other well-known schemes like EATS and MSL seem to suffer under these realistic conditions. EMPS tries to balance the offered load by only considering the heads of the message queues maintained by the source nodes. As a result, its performance is degraded, especially for medium to high offered loads and for rather slowly tunable transceivers. The proposed MinPSL scheme, on the other hand, examines each source node's message queue up to a certain depth and assigns higher priorities to messages intended for the least used destinations. In this way, MinPSL perfectly minimizes the probability of having to schedule two or more messages intended for the same destination simultaneously or at close times. Furthermore, it also minimizes the actual performance penalty incurred, when scheduling of consecutive messages with the same destination cannot be avoided. Extensive simulations are carried out in order to study the performance of MinPSL and compare it to the EMPS scheme under various conditions. The simulation results ascertain the fact that the proposed MinPSL protocol always brings about a considerable performance improvement.

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Multiwavelength Optical LANs

Cited by 25 publications

References 0 publications

CS-POSA: A High Performance Scheduling Algorithm for WDM Star Networks

CS-POSA: A High Performance Scheduling Algorithm for WDM Star Networks

SASA: A Synthesis Scheduling Algorithm with Prediction and Sorting Features

An Intelligent Global Message Prioritization Algorithm for High-Performance Scheduling in WDM Star Networks

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