Limitations and Difficulties of Wireless Technologies

Wireless is convenient and less expensive

Limitations and political and technical difficulties inhibit wireless technologies

Lack of an industry-wide standard

Device limitations

E.g., small LCD on a mobile telephone can only

displaying a few lines of text

E.g., browsers of most mobile wireless devices use

wireless markup language (WML) instead of HTML

Background

Provides preview and context for rest of

book

Covers basic topics

Data Communications

TCP/IP

Broadband Wireless Technology

Higher data rates obtainable with broadband wireless technology

- Graphics, video, audio

Shares same advantages of all wireless services: convenience and reduced cost

-  Service can be deployed faster than fixed service

-  No cost of cable plant

-  Service is mobile, deployed almost anywhere

Wireless Comes of Age

Guglielmo Marconi invented the wireless telegraph in 1896

Communication by encoding alphanumeric characters in analog signal

Sent telegraphic signals across the Atlantic Ocean

Communications satellites launched in 1960s

Advances in wireless technology

Radio, television, mobile telephone,communication satellites

More recently

Satellite communications, wireless networking,cellular technology