Motorola V323I - Cell Phone - CDMA2000 1X User Manual download pdf (Page 4)

Telcom 2700/INFSCI 1071

Mobile vs. Wireless

• Wireless Communication System:

– Any electrical communication system that uses a naturally

occurring communication channel, such as air, water, earth

• Mobile and Wireless are not interchangeable

Wireless vs. Mobile Examples

88stationary computer, pay phone

8 9 calling card, call forwarding

9 8 wireless local loop

99cell phone, laptop with WLAN

• Mobile wireless communication systems focus

– Communicate over the air via radio-waves

– Support some form of user mobility

• Examine how they are different from wired networks

Telcom 2700/INFSCI 1071

Wireless Issues

•

Wireless link implications

– communications channel is the air

• poor quality: fading, shadowing, weather, etc.

• data rate and coverage vary

– regulated by governments

• frequency allocated, licensing, etc.

– limited bandwidth

• low bit rate, frequency planning and reuse, interference

– power issues

• Power levels regulated (safety issue), conserve mobile terminal

battery life

– security issues

• wireless channel is a broadcast medium!

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Motorola V323I - Cell Phone - CDMA2000 1X User Manual Page 4