Contributed by Yi-Bing Lin
can be overlaid on existing analog cellular systems
and share their
infrastructure equipments on a non-interfering basis. Basically, CDPD
transmits packet data over idle cellular channels, and
channel sniffing and channel hopping are used to
autonomously switch the CDPD stream
to another channel when the current channel is about to be assigned for voice
usage. CDPD does not communicate with the underlined cellular network. However,
CDPD takes advantage of its knowledge of the channel assignment algorithm of
the cellular cell, and predicts the channels available for CDPD use.
Three network elements are considered in CDPD:
is mobile controlled.
CDPD user mobility is supported by
Mobile Network Location Protocol .
Organization of this Topic
Cellular Digital Packet Data: A Tutorial.
Submitted to International Journal of Wireless Information
CDPD Forum, Inc.
Cellular Digital Packet Data System Specification: Release 1.1.
Quick, R.F., Jr. An Overview of the Cellular Digital Packet Data (CDPD) System.
IEEE PIMRC, 338-343, 1993.
Pawlowski, C., and McConnell, P.
CDPD Air Interface Basics. Telephony, 49-62, December 5, 1994.
JPL's Wireless Communication Reference Website
Yi-Bing Lin (Author) and
Jean-Paul M.G. Linnartz (Ed.), 1996.