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PERFORMANCE OF OPTICAL NETWORKS: A SHORT SURVEY

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Author(s): Dr.A.KAVITHA

Journal: International Journal of Engineering Science and Technology
ISSN 0975-5462

Volume: 4;
Issue: 2;
Start page: 600;
Date: 2012;
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Keywords: BER (Bit Error Rate) | Optical Packet Switching (OPS) | Packet Loss Rate (PLR) | Quality of Service (QoS) | WDM (Wavelength Division Multiplexing).

ABSTRACT
In the information technology era, there are relentless needs for networks with extremely high capacity. Due to the increasing internet usage and upsurge in users, the end users were longing for the revolution in the network. At this juncture to make the dreams of the network users come true, tremendous research has resulted in opticaltechnology which is a great boon to the world of communication. Optical Packet Switching (OPS) presents new avenues for high speed interconnection networks. There is a rapidly growing demand for high-throughput networks to transmit heterogeneous traffic services such as communication of voice, images and data, multimedia interaction and advanced digital service which warranted OPS. These heterogeneous traffic services in OPS networks require appropriate treatments (e.g. delay or bandwidth guarantees). Quality of Service (QoS) is the only way through which optimization can be attained in the OPS. OPS networks place a particular attention to the QoS provisioning problem from end-to-end perspective. QoS provisioning is therefore a mandatory task in optical packet switching networks. The goal of QoS is to provide guarantees on the ability of a network to deliver predictable results. A network monitoring system must typically be deployed as part of QoS, to insure that networks are performing at the desired level. Definitely, optical networks with improved QoS capabilities are the main goal for the next generation telecommunication infrastructure. One of the proper ways of improving QoS is enhancing the network parameters in each layer. The major parameters that affect the performance of QoS in OPS are: (1) Bit Error Rate (BER), (2) Packet Loss Rate (PLR), (3) Bandwidth, (4) Delay, (5) Jitter, (6) Recovery time, (7) Response time, (8) Reliability, (9) Availability, (10) Fault tolerance and (11)Throughput and so on.

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