Wireless Modems In A Communication System - Sony Ericsson GR64 Integrator's Manual

2.2 Wireless modems in a Communication System

Figure
2.2-1 and
system using the wireless modem.
when the script is embedded on the wireless modem and
communication system when a micro-controller is used. They also show the
communication principles of the system and the interface between the wireless
modem and the application. The definitions in the figures, as used elsewhere in this
manual, are in accordance with the recommendations of 3GPP TS 27.007.
The MS (mobile station) represents the wireless modem and SIM card. The wireless
modem excluding SIM card, is known as the ME (mobile equipment).
The DTE (data terminal equipment) is the controlling application. This can be either
an external host or an internal embedded application.
The DCE (data circuit terminating equipment) is the serial communication interface of
the MS.
MS MS
SIM SIM
DC DC
POWER POWER
Figure 2.2-1 Main Blocks in a Wireless System (embedded application)
LZT 123 1834
Figure
2.2-2 illustrate the main blocks of a wireless communication
Figure
SIM SIM
GSM GSM
ENGINE ENGINE
ENGINE ENGINE
DCE DCE
DCE DCE
2.2-1 shows the communication system
Figure
GSM GSM
STATUS & STATUS &
RESPONSE RESPONSE
EMBEDDED EMBEDDED
APPLICATION APPLICATION
DTE DTE
DTE DTE
COMMAND COMMAND
& CONTROL & CONTROL
2.2-2 shows the
GSM GSM
NETWORK NETWORK
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