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Presenter: Mr. R. Muralidharan, SMIEEE, IEEE Computer Society India DVP Speaker, OSS Systems (India) Pvt. Ltd., Mubai, India
Supervisor:

Date: Wed, August 14, 2002
Time: 13:30:00 - 14:30:00
Place: EOW 430

ABSTRACT

Abstract

Integrated access for various services at the edge of an optical network, including issues and challenges involved, are discussed. Optical networking is a technology for carrying very high volumes of data, voice, video services etc, on multiple wavelengths of light.

While the voice traffic is characterized by predictable growth and low-bandwidth requirements, data traffic has shown unpredictable growth and high bandwidth requirements. The Internet, private IP networks and other data intensive applications have shown exponential growth. This has increased the demand for high-speed capacity within the network. With data network traffic doubling every 6 months, service providers have expanded their networks fourfold over the last four years, whereas long-distance providers have grown their networks by seven times. Much of the added capacity has been in optical networking. With the rapid growth of first generation data networks, such as Frame Relay, IP and ATM, the underlying SONET/SDH network has served as the transmission medium for overlay data traffic as well as voice. At the edge of the optical network, SONET/SDH network equipment act as integrated access devices (IAD) and groom multiple low-speed data/voice/video circuits into a single high-speed optical stream. With extensive management functionality built into the protocol, SONET/SDH is the layer that today provides the service creation, fault management and restoration capabilities.

One of the important points in optical networking is to convert data/voice into optical format as early as possible, at the edge of the network, and keep it optical as it passes through the network. Inherently, the SONET/SDH architecture is designed for voice traffic and hence there are many issues related to providing integrated services in the optical network. Issues such as Quality of service (QoS), bandwidth provisioning, dynamic provisioning, wire speed data processing, differentiated services etc need to be addressed. Hardware software co-design methodology is best suited for realizing such hard real time systems that need to operate at wire speed for data rates reaching gigabits. Aggregation of data channels involves processing incoming channel packets and encapsulating them into PPP/MP frames in real time. The payload received from the optical side needs to be demultiplexed and mapped onto an appropriate slow speed interface. The Access systems are designed to be Managed objects and they can be managed by a global Network Manager such as HP Open View. For this the access nodes need to have SNMP/CMIP agents as well as SONET DCC with TL1 stacks. The architecture of the system with appropriate delegation of tasks to achieve real time data transport at Gigabit speeds is a challenge.

For Further Information Contact:
Dr. V.K. Bhargava
This talk is co-sponsored by the Computer Chapter of the IEEE Victoria Section