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Java Abs   Asynchronous Transfer Mode   Atm
Java Abs   Asynchronous Transfer Mode   Atm
Java Abs   Asynchronous Transfer Mode   Atm
Java Abs   Asynchronous Transfer Mode   Atm
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Java Abs Asynchronous Transfer Mode Atm

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  • 1. ASYNCHRONOUS TRANSFER MODE (ATM) ATM NETWORKS & INTELLIGENT PACKET FILTERING PROJECT PRE-REQUISITIONS The TCP/IP protocol suite is the standard requirement for all applications that need to communicate over the Internet. As TCP/IP applications are unable to specify the QoS parameters needed for most Asynchronous Transfer Mode (ATM) services, we tend to use the GCRA Algorithm. The purpose of Cell-Rate Guarantees for Traffic across ATM Network is to provide QoS. ATM is a connection-oriented switching technology, utilizing statistical multiplexing of fixed-length packets, known as cells. The purpose of traffic control is to minimize congestion. In an ATM network when the Source Machine continuously sends cells to the Destination Machine through the Router Machine, there will be a possibility of occurring congestion. When congestion occurs the Routing Machine cannot accept more cells and hence these cells will be discarded. This causes regeneration and retransmission of the discarded ATM cells. The objective of this project is to simulate an overflowing ATM network and establish a router with congestion control based on the GCRA algorithm. PROJECT MODULES • SOURCE MODULE • ROUTER MODULE • DESTINATION MODULE ♦ SOURCE MODULE The task of this Module is to divide the Message in the form of 48 Bytes and forward it into the Router. The allocated Bytes are called as Packets.
  • 2. ♦ ROUTER MODULE The task of this Module is to accept the packet from the Source. Each and Every packet arrived in the router are send to Destination based on the following algorithm. They are Generic Cell Rate Algorithm GENERIC CELL RATE ALGORITHM It is used to define conformance with respect to the traffic contract of the connection. For each cell arrival, the GCRA determines whether the cell conforms to the traffic contract. The UPC function may implement the GCRA, or one or more equivalent algorithms to enforce conformance. The GCRA is defined with two parameters: the Increment (I) and the Limit (L). GCRA implements • Virtual Scheduling Algorithm. • Leaky Bucket Algorithm. VIRTUAL SCHEDULING ALGORITHM It continuously monitors the traffic inflow and it anticipate occurrence of congestion, it sends a warning message to the Source Machine to slow down the traffic and clear the buffer in the Router Machine and it will send another message to the Source Machine to continue the cell transmission. LEAKY BUCKET ALGORITHM It sends the cells to the corresponding Destination Machine at a regular interval (i.e. certain rate corresponding to a traffic cell rate parameter) ♦ DESTINATION MODULE The task of this Module is to accept the packet from the Egress router and stored in a file in the Destination machine.
  • 3. SYSTEM REQUIREMENTS SOFTWARE REQUIREMENTS:- Java1.3 or More Swings Windows 98 or more HARDWARE REQUIREMENTS:- Hard disk : 40 GB RAM : 512 MB Processor : Pentium IV System Design Source Router Destination Machine Machine Machine DATA FLOW DIAGRAM Source Module Source Message Message are divided and allocated in the form of 48 bytes (1 Packet) Router
  • 4. Router Module Router Virtual Scheduling Algorithm Leaky Bucket Algorithm Destination Destination Module Destination Retrieve the Allocated Byte Combined the Packets (48 Bytes) Finally The Message is Saved in Text File

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