Hi!

I don't exactly remember in which context I was last communicating with whom of you about the question whether or not the BA of a cell should include its own BCCH frequency or not.

I think from commercial networks we could see both behaviors, and it was thus unclear what we should do for OpenBSC.

I've now found a reference for this in the GMS specs: GSM 3.22 Chapter 4.8:

NOTE: The PLMN operator cannot expect the ME to store the BCCH or CPBCCH carrier frequency of the serving cell in the SIM unless the BA(BCCH) includes the BCCH or CPBCCH carrier frequency on which it is broadcast.

So now we know at least the difference when it comes to those two options.

Regards, Harald