'Mobile phone system' diaporamas de présentation

Mobile Communications Chapter 4: Wireless Telecommunication Systems

Mobile Communications Chapter 4: Wireless Telecommunication Systems. Market GSM Overview Services Sub-systems Components. DECT TETRA UMTS/IMT-2000. Mobile phone subscribers worldwide. approx. 1.7 bn. 1600. 1400. 1200. GSM total. 1000. TDMA total. CDMA total.

1.77k views • 98 slides

Computer Networks (EC-321) DataLink Layer

Computer Networks (EC-321) DataLink Layer. Outline. Design Issues Error Detection and Correction Elementary Data Link Protocols Sliding Window Protocols Protocol Specification and Verification Example Data Link Protocols. Data Link Layer.

559 views • 42 slides

Locating Users of Mobile Phones Tim Moors

Locating Users of Mobile Phones Tim Moors. Senior Lecturer School of Electrical Engineering and Telecommunications University of New South Wales Sydney, NSW, Australia t.moors@unsw.edu.au. Outline. Generations of mobile phones Phone identifiers Cellular location Cellular communication

457 views • 24 slides

1667: Robert Hooke invented a string telephone

483 views • 10 slides

How organisations can monitor employees

How organisations can monitor employees. How does GPS work?. Introduction. Organisations might wish to know what their employees are doing and where they are during their working day. There are many reasons for this. Why might the police and a bank want to use GPS?

165 views • 9 slides