431-313 Voice and Data Networks

Credit Points:

Prerequisite/s:

Timetable:

Contact:

Objectives:

On completion of this subject students should:

• understand the basic methods of operation of modern communications networks used for voice transmission and for data transmission;

• appreciate the techniques necessary for the design of telecommunications and computer communications networks;

• be able to use queueing theory models to determine the traffic performance of simple voice and data communication links.

Content:

Data transmission: link level protocols, the 7 layer ISO/OSI model, examples of protocols. Packet switching: Routing and flow control. Queueing models for packet switching. Circuit switching: Offered traffic, carried traffic, time congestion, Erlang loss function, Engset model. Network topologies. Design of switching networks, space division and time division switching, practical switching systems. Call processing. Common channel signalling, signalling system number 7. Local area networks: Random access protocols - ALOHA, slotted ALOHA, and CSMA/CD. Controlled access protocols - token ring and token bus.

Assessment: