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Peter Stuge peter at stuge.seHi Yann, Yann R. Moupinda wrote: > An important part of my thesis is to understand how the sysmoBTS works > and therefore I did some measurements with wireshark to analyse the > data flow between the BTS,BSC and MSC/HLR/VLR/EIR. This is also to > see the main differences between a sysmoBTS and a conventional GSM > Network. > So i can not see what happens behind this port (behind BSC). > > In order to get the communication between BSC and MSC, i decided to > have a deeper look on the logging messages of the sysmoBTS. Even there, > i cannot recognize how the data transmission between BSC and MSC works. Start looking at the source code. Pick some entry point for a message that you understand. Follow the call graph through the source code, to learn about the data flow in OpenBSC. You will quickly find what the difference is between OpenBSC and a conventional BSC. //Peter