DERIVATION OF THE BANDWIDTH RESOURCE ALLOCATION IN AN ATM-BASED NETWORK

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 burst 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. Queuing Delay standard which ranges between 0.0000000501s and 0.000000103s and Queue Delay Deviation values of between 0.0000000366s and 0.000000584s were all considered.