Siemens TC65 - Manual (Page 32)

TC65 JAVA User's Guide
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TC65 JAVA User's Guide_V05 Page 32 of 90 26.09.2005
5.9.3.3 Scenarios with GPRS Connection
The biggest challenges to the module performance are setting up a GPRS connection,
receiving data on javax.microedition.io interfaces and sending or receiving the data on the
RS232 API with the help of a Java application.
5.9.3.3.1 Upload
Since the TC65 supports GPRS class 12, up to four timeslots for upload data are available.
The Java application receives data over RS232 API and sends them over GPRS to a server.
Table 1: Download data rate with different number of timeslots, CS2
Upload data rate with x timeslots
Coding scheme 2
[kbit/s]
1
timeslot theor.
Value * % from
theor.
Value 2
time-
slots theor.
Value * % from
theor.
Value 3
time-
slots theor.
Value * % from
theor.
Value 4
time-
slots theor.
Value * % from
theor.
Value
9 12 75% 15 24 63% 20 36 55% 16 48 33%
* net transmission rates for LLC layer
Table 2: Download data rate with different number of timeslots, CS4
Upload data rate with x timeslots
Coding scheme 4
[kbit/s]
1
timeslot theor.
Value * % from
theor.
value 2
time-
slots theor.
Value * % from
theor.
value 3
time-
slots theor.
Value * % from
theor.
value 4
time-
slots theor.
Value * % from
theor.
value
13 20 65% 22 40 55% 20 60 33% 13 80 16%
* net transmission rates for LLC layer
GP
RS
co
nn
ec
tio
n
up
loa
d d
ata
TC65
Java
application
(transfer data)
ASC
1
Figure 15: Scenario for testing data rates on ASC1 with GPRS data upload