This paper proposes a packet switched broadband integrated network, for multi-rate services such as voice and data. A novel design of a high speed packet switch capable of catering to voice and data traffic is described. Some sources of traffic bottle-necks are identified, and methods of clearing the bottle-necks through flow control techniques are discussed. The design and flow control parameters are obtained through simulation, and the results are presented. The performance of the network and the packet switch is evaluated for various traffic characteristics through a second simulation, and the results are briefly presented. © 1992.

Ashok Jhunjhunwala

Department of Electrical Engineering

Computer networks

Computer simulation

Control systems

Design

Evaluation

Flow control

Packet switching

Telecommunication traffic

BROADBAND INTEGRATED SERVICES DATA NETWORK

HIGH SPEED PACKET SWITCH

Voice/data communication systems

IIT Madras is a public technical and research university located in Chennai, Tamil Nadu. Founded in 1959, it is recognised as an Institute of National Importance.

IIT Madras has been ranked as the top engineering institute in India for four years in a row by the National Institutional Ranking Framework of the MHRD

It currently offers undergraduate, postgraduate and research degrees across 16 disciplines in Engineering, Sciences, Humanities and Management. About 596 faculty belonging to science and engineering departments and centres of the Institute are engaged in teaching, research and industrial consultancy.

IIT Madras

The design and flow control of a high speed, integrated, packet switched network

Computer Networks and ISDN Systems

Digital transmission through optical fibres and 'packet-switching' are two independent technologies that have gained wide acceptance during the past decade. This paper considers the possibility of a fusion between the two technologies. The network envisaged is a long-haul, packet-switched network, with optical fibre links between the nodes, for the integrated transmission of voice and data. The advantages of implementing packetswitching on an optical fibre network are brought out. The proposed network effectively utilizes the bandwidth of 140 Mbit/s fibre optic links to transport voice and data packets in a store-and-forward manner from the source node to the destination node. The issues involved in the selection of routes for voice and data packets are discussed. Some standards and timing constraints have been evolved for the transmission of speech in packets. This imposes a limitation on the allowable delay at each node. The design of an ultra-fast packet-switch with high throughput, which satisfies the timing constraints, is described in this paper. Protocols for call set-up, priority rules, traffic flow and congestion control procedures are proposed and discussed. A simulation model of the packet-switch is developed, and its performance is evaluated for varying traffic conditions. The results of the simulation are presented. © 1987 SPIE. All rights reserved.

Proceedings of SPIE - The International Society for Optical Engineering

A fibre optic network for integrated voice/data transmission

The design of a high speed, broadband packet switch with two priority levels for application in integrated voice/data networks is presented. The packet switch can efficiently cope with 128 byte packets converging on it from eight 140 Mbit/s dynamic time division multiplexed fibre optic links. The packet switch throughput varies with the load and traffic composition, and the delay experienced by voice and data packets is within 300 μs and 3 ms, respectively. The design is implemented by task-sharing in a multi-processor configuration. The design of the packet switch, including its subsystems, is detailed here. © 1989.

Journal	Computer Networks and ISDN Systems
ISSN	01697552
Open Access	No