Derivation of the Bandwidth Resource Allocation in an Atm- Based Network

Description

– Derivation of the Bandwidth Resource Allocation in an Atm- Based Network –

Download Derivation of the Bandwidth Resource Allocation in an Atm- Based Network. Students who are writing their projects can get this material to aid their research work.

Abstract

Asynchronous Transfer Mode (ATM) technology is the transfer mode for implementing a Broadband-Integrated Services Digital Network (B-ISDN). ATM defines multiplexing and switching techniques for broadband signals. Synchronous Optical Network (SONET) is employed in the B-ISDN backbone.

The main objective of an ATM is to guarantee Quality of Service (QoS) in transfer of cell streams across networks. This technology recommended as the transport vehicle for the B-ISDN offers a great flexibility to transmission bandwidth allocation to accommodate diverse demands of multimedia connections.

Dynamic Bandwidth Allocation (DBA) is a fundamental factor in network performance for an ATM-based bursty traffic. However, the fundamental problem in ATM network is defining the way to allocate bandwidth optimally especially for unpredictable bursty traffic.

This project aims at developing the approach to the derivation of the bandwidth resource allocation in an ATM-based network. The main tool used for the simulation is Riverbed Modeler 2014 Academic Edition 17.5 (OPNET).

This project developed the intended format with bandwidth allocation guide for N* 64kbps of a Primary Rate Interface (PRI) T1 trunk lines for varying delay, loss and buffer occupancy.

The allocation was developed for varying traffic intensity between 0 and 320 Kbps corresponding to five channels of 64kbps each. Cell Loss Probability (CLP) standards between 0.0000875 and 0.002967 were considered. The Buffer Occupancy values were between 0.00000237KB and 0.0000117KB.

Introduction

1.1 Background of the Study

In digital communications, bandwidth as a concept has to do with the amount of data a link or network path can deliver per unit of time. For many multimedia applications, the available bandwidth has direct impact on the applications’ performance.

The terms bandwidth and throughput often characterize the amount of data that the network can transfer per unit of time.

Bandwidth plays a significant influence in several network communications. Several applications can benefit from knowing the bandwidth characteristics of their network paths.

Network providers present lists of bandwidth bouquet from which interested users select and are billed. The customers’ subscription to the service provider leads to traffic contract which will finally result in signing of Service Level Agreement (SLA).

The rate of bandwidth utilization by various customers makes the providers to plan for capacity upgrade or expansion for the network to avoid congestion, traffic drop or total collapse of the network.

It is a standard that bandwidth utilization of above 70% is an invitation to heavy congestion in which case various methods are encourage to avoid such state of congestion.

Although network providers can effectively monitor bandwidth utilization through traffic policing and shaping, it is however not the same from the customers point of view.

To achieve this network administrator with administrative privileges and access to the network devices such as routers or switches may connect to a link of interest in order to measure the bandwidth using the Simple Network Management Protocol (SNMP).

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