User Manual

Application layers
99-137719-D Confidential - For internal use 8-53
8888
Control interface
• Cause code 6: The RM has calculated an unrealistic change in Doppler velocity
(doppler acceleration is unrealistic). The cause is probably that position and/or
velocity is wrong. The RM will not send data on-air if this is case.
8.5.6.2 MSG_ABNORMALITY_OK
This message clears one or more abnormality situations.
• Cause code 0: This cause code is used to cancel all previous Doppler-related cause
codes (cause 4, 5 and 6) received in the MSG_ABNORMALITY. The RM will again
send data on-air.
8.5.7 Data tunnel
The BGAN XL Radio Module provides four data tunnels providing communication links
between the data interface and the control interface. The RM listens on UDP port 130
and TCP port 131 and accepts only one session at a time on each port. The data received
on the respective ports is forwarded to the control interface.
offset \ byte 0 1
0
Opcode Cause code
Table 8-98: MSG_ABNORMALITY_OK
Data field Type Length Offset Value Comment
Opcode U8 1 0 2
Cause code U8 1 1 0: Doppler OK Cause code for
abnormality ok
Table 8-99: MSG_ABNORMALITY_OK data fields
Figure 8-27: AP-BP tunnel, TCP example
Data Interface
master
RM
TCP OPEN [port 131]
TCP send ’hello’
TCP recv ’hi’
Control Interface [port 131] ’hi’
Control Interface [port 131] ’hello’
Control Interface
master
Establish connection
to AP-BP tunnel
TCP CLOSE [port 131]
Control Interface [port 131] ’hi again’
Data is
discarded