Mobile Radio Systems Historical Milestones to 1995


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Early Milestones

1885: Heinrich Hertz—First radio
transmission across a laboratory using
coils and gaps
1897: Guglielmo Marconi—First radio
transmission using a pole on a mast
over 18 miles to a tugboat
1921 and 1923: One-way police radio in
Detroit and London, respectively


Mid-century Milestones

1927: First international spectrum
management conference (for carriers up to
1.5MHz)
WW2: Mass production of mobile radio
equipment
1946: First public mobile telephone service
1948: Inventions of the transistor and the
cellular concept, both by Bell Labs
1965: First pocket-sized mobile phones


Wireless LAN Milestones

Late ’80s: FCC allocated license-free
spectrum; IEEE 802.11 wireless LAN
(WLAN) working group established
1997: IEEE 802.11 standard for WLANs
(Wi-Fi) adopted: 802.11b at 2.4 GHz
and 802.11a at 5 GHz


Recent Milestones

2.5 Generation—mobile wireless data
1998: NTT DoCoMo introduced I-mode, a
wireless data service and internet
“microbrowser”
199?: GPRS, the packet data extension to
GSM, is introduced
3rd Generation:
1998: IMT-2000 proposals for a world-wide
3rd generation standard are submitted