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GPRS attach retry mechanism | Telit Cinterion IoT Developer Community

September 4, 2018 - 10:05am, 11923 views


This is more a generic question not directly related to a specific gemalto modem:

In our application sometimes it happens that the network provider detaches the modem from GPRS service while the modem is still registered to the GSM network. We assume that this happens due to GPRS network conquestion but this isn't fully proofen yet.

The reject cause code we receive with AT+CEER is value 7, "GPRS services not allowed".

We observed that in this situation the modem does not invoke any retry or reconnection mechanism by itself, it seems that this should be performed by the application software instead.

My question is: How should a recommended retry mechanism for GPRS attach look like?

What retry intervals should be used to be quickly online again but to avoid high network loads, and should the retry intervals be constant or should they increase in time?