GR64 Integrators Manual
Page: 11/104
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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, as used elsewhere in this manual, are in accordance with the
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.
SIM
SIM
GSM
ENGINE
GSM
ENGINE
DCE
DCE
DTE
DTE
S
Y
S
T
E
M
I
N
T
E
R
F
A
C
E
DC
POWER
STATUS &
RESPONSE
COMMAND
& CONTROL
EMBEDDED
APPLICATION
MS
GSM
NETWORK
SIM
SIM
GSM
ENGINE
GSM
ENGINE
DCE
DCE
DTE
DTE
S
Y
S
T
E
M
I
N
T
E
R
F
A
C
E
DC
POWER
STATUS &
RESPONSE
COMMAND
& CONTROL
EMBEDDED
APPLICATION
MS
GSM
NETWORK
Figure 1: Main Blocks in a Wireless System (embedded application)
