07TrafficEngineering - Telecomminication Engineering

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1 February 28, 2007 P. Ghosal , Department of IT, BESUS Telecommunication Systems Prasun Ghosal Dept of IT, BESUS January 15, 2007 P. Ghosal , Department of IT, BESUS Traffic Engineering January 15, 2007 P. Ghosal , Department of IT, BESUS Why Worry About Traffic Engineering? • Telephone systems are multipoint-to-multipoint networks • There can be many more users than transmission paths • Traffic demand can exceed capacity, causing overflow and delay • When demand > capacity, performance deteriorates exponentially January 15, 2007 P. Ghosal , Department of IT, BESUS Telecom Network Capacity Transmission Capacity Switching Capacity Network Capacity January 15, 2007 P. Ghosal , Department of IT, BESUS Basic Terminology Attempt - Any action that initiates the process of establishing a connection Call - Attempt that is processed and makes a bid for service Messages - Calls that are successfully completed to the receiving user Holding time - The amount of time an attempt is in the system, regardless of its final disposition Minutes of use - The length of time that a connection is actually established between users January 15, 2007 P. Ghosal , Department of IT, BESUS Physical Aspect of Load Line Concentration/Expansion Access Line Bay Access Lines Junctors Trunks Outbound Inter-Office Inbound Inter-Office Users Intra-Office
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2 January 15, 2007 P. Ghosal , Department of IT, BESUS Traffic Density Erlang All of the attempts and associated holding time in one hour expressed as a percentage of an hour CCS All of the attempts and associated holding time in an hour expressed as hundreds of call seconds Erlangs = Average Arrival Rate ×
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This note was uploaded on 01/25/2011 for the course ELECTRONIC 201 taught by Professor Profsasidhar during the Spring '08 term at American College of Computer & Information Sciences.

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07TrafficEngineering - Telecomminication Engineering

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