Scenarios With Gprs Connection; Upload; Download; Figure 15: Scenario For Testing Data Rates On Asc1 With Gprs Data Upload - Siemens TC65 JAVA User Manual

TC65 JAVA User's Guide
Strictly confidential / Draft
5.8.3.3

Scenarios with GPRS Connection

The biggest challenge for the module performance is setting up a GPRS connection,
receiving data on interfaces of javax.microedition.io and sending or receiving the data on the
RS232 API with the help of a Java application.
5.8.3.3.1

Upload

TC65 supports GPRS class 8, this means one timeslot for upload data is available. The Java
application receives data over RS232 API and sends them over GPRS to a server.

Table 2: Data rate upload

Data rate
Theoretical value
% from theoretical value*
* net transmission rates for LLC layer

Figure 15: Scenario for testing data rates on ASC1 with GPRS data upload

5.8.3.3.2

Download

The data rate for downloading data over GPRS depends on the number of assigned
timeslots and the coding schemes given by the net. TC65 supports GPRS class 8, this
means the number of assigned timeslots can be up to 4.
For measurement purposes, the Java application receives data from the server over GPRS
and sends them over RS232 to an external device.

Figure 16: Scenario for testing data rates on ASC1 with GPRS data download

TC65 JAVA User's Guide_V01
Upload data rate in [kbit/s]
Coding scheme 2
11
12
91%
Page 32 of 69
Coding scheme 4
18
20
90%
TC65
Java
application
(transfer data)
TC65
Java
application
(transfer data)
s
11.03.2005