Wireless Cpu In A Communication System - Wavecom GR64 GSM/GPRS Integrator's Manual

2.2

Wireless CPU in a Communication System

Figure 1 and Figure 2 illustrate the main blocks of a wireless communication system
using the Wireless CPU. Figure 1 shows the communication system when the script is
embedded on the Wireless CPU and Figure 2 shows the communication system when a
micro-controller is used. They also show the communication principles of the system
and the interface between the Wireless CPU and the application. The definitions in the
figures,
recommendations of 3GPP TS 27.007.
The MS represents the Wireless CPU and SIM card. The Wireless CPU excluding SIM
card, is known as the ME.
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
POWER POWER
Figure 1: Main Blocks in a Wireless System (embedded application)
GR64 Integrators Manual
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as used elsewhere
SIM SIM
DC DC
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in this manual,
SIM SIM
GSM GSM
GSM GSM
ENGINE ENGINE
ENGINE ENGINE
STATUS & STATUS &
RESPONSE RESPONSE
EMBEDDED EMBEDDED
APPLICATION APPLICATION
DCE DCE DTE DTE
DCE DCE DTE DTE
COMMAND COMMAND
& CONTROL & CONTROL
are in accordance
GSM GSM
NETWORK NETWORK
with the