Gs interface (BSSMAP+) between SGSN and MSC/VLR
This should go hand-in-hand with adding Gs support to OsmoSGSN. Once we have this in place on both sides, we can do paging coordination between Cs and Ps, as well as combined LU/RAU.
- initial libosmocore definitions for Gs are in
- TTCN3 module for BSSAP+ is available at https://git.eclipse.org/c/titan/titan.ProtocolModules.BSSAPP_v7.3.0.git