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3G and 4G Wireless– Advances and Challenges
Classic Wireline MaBell Public Switched Telephone Network (PSTN)
US Universal coverage achieved early 1980’s
“Wireless” First Generation Analog Systems
Speech
AMPS, TACS
Second Generation Digital Systems
Enhanced Capacity
CDMA, D-AMPS, T...See more
DMA, GSM, DECT, PDC
2.5 Generation Systems
Low Speed Data
GPRS, EDGE
Third Generation Systems
“INTERNET” on Wireless
WiFi/HyperLAN <-> WiMAX/HyperWAN <-> CDMA2000/WCDMA
Evolution to All IP Network including VoIP
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Added: 4 years ago
3G_4G_Adv_Chal_041406_ver1_[EDocFind.com].ppt
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