Cep Terminals GSM/GPRS TERMINAL CT63 JAVA 6203 用户手册
产品代码
6203
Java User’s Guide
5.12 Performance
39
wm_java_usersguide_v19
Page 38 of 109
2012-01-27
Confidential / Released
Figure 19: Scenario for testing data rates on ASC1 with GPRS data upload
5.12.3.5
Download
The data rate for downloading data over GPRS/EDGE depends on the number of assigned
timeslots and the coding schemes given by the net. The ME supports up to four downlink time
slots. For the measurements, the Java application receives data from the server over GPRS
and sends them over RS232 to an external device.
timeslots and the coding schemes given by the net. The ME supports up to four downlink time
slots. For the measurements, the Java application receives data from the server over GPRS
and sends them over RS232 to an external device.
Figure 20: Scenario for testing data rates on ASC1 with GPRS data download
The tables below show the download data rates that can be achieved if hardware flow control
is enabled on the CommConnection interface and the port speed is set to 460800.
is enabled on the CommConnection interface and the port speed is set to 460800.
Table 5: GPRS Download data rate with different number of timeslots, CS2
Download data rate with x timeslots
Coding scheme 2
[kbit/s]
Coding scheme 2
[kbit/s]
1
time-
slot
time-
slot
theor.
Value
Value
1
1.
net transmission rates for LLC layer
%
from
theor.
Value
from
theor.
Value
2
time-
slots
time-
slots
theor.
Value
Value
%
from
theor.
Value
from
theor.
Value
3
time-
slots
time-
slots
theor.
Value
Value
%
from
theor.
Value
from
theor.
Value
4
time-
slots
time-
slots
theor.
Value
Value
%
from
theor.
Value
from
theor.
Value
11 12 91%
21 24
87%
29 36
81%
35 48
73%