ada503803(the mobile internet——the next big thing2007)(8)

移动互联网及应用

What About Commercial Comms?Driven by Capacity (bits/sec/Hz)& Affordability (Mbits/$)Telecom/Datacom NetworkConnect to OXC/DSC Long Haul/Core Layer 2& 3 Processing Next-Generation SONET (OC-12/48/192) Class 5 Telecom Switches ATM switches OC-3/12 routers routers 10/100/1000 EthernetWiMax Mobile< 2.5 bps/Hz*

OADM Metro/Core Fiber Ring (~100 km, 40-80λ) OC-48/192 Gb IP/Ethernet routers/switches Wireless OC-48/192, GbE MAN Hub OC-48/192, GbE Multi-Service/Aggregation Ring (8-16λ) Wireless MAN Sites

OC-3

PON Hubs: Fiber Chan/ESCON

*Estimated link spectral efficiencyMobile Broadband Wireless Access< 1 bps/Hz* 2G/2.5G Cellular< 2 bps/Hz*

a ar m ul km ll u 10 Ce

Coverage

1 km 0 0 10 m m 10 m

3G Cellular< 0.2 bps/Hz* WiFi< 2.7 bps/Hz* Bluetooth< 0.2 bps/Hz* 0.1 1

Future Technologies

UWB< 1.5 bps/Hz* 10 100

Maximum Data Rate/Channel (Mbps)Ref. A. Azzam, Southeast Wireless, 2004.

Can we affordably bring the bandwidth of the core to the mobile user?

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