Wide Area Wireless Data Services

Wide area wireless data services provide wireless data to high-mobility users over a very large coverage area. In these systems a given geographical region is serviced by base stations mounted on towers, rooftops, or mountains. The base stations can be connected to a backbone wired network or form a multihop ad hoc wireless network.

The cellular digital packet data(CDPD) system is a wide area wireless data service overlayed on the analog cellular telephone network.CDPD shares then FDMA voice channels of the analog systems, since many of these channels are idle due to the growth of digital cellular. The CDPD service provides packet data transmission at rates of 19.2Kbps.

References:
Wireless communication
By
Andrea Goldsmith
Stanford University

Images:
Google Images

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