Thomas Kunz
Systems and Computer Engineering
13
CDPD: Architecture
–M-ES: user device, mobile, identified by at
least one globally unique Network Entity Identifier
(NEI)
–IS: basically a router, might provide additional
services
–MD-IS: only entity that has knowledge of
mobility, runs MNLP (Mobile Network Location Protocol):
neach M-ES belongs to a fixed home area, MHF
keeps track of this information
nMSF handles packet transfer services for visiting M-ES
nrequires
that M-ES register with serving MD-IS when roaming
–MDBS: supports air interface to M-ES
nresides at the AMPS cell
nuses AMPS transmit and receive equipment