How the signalling messages flow between network nodes of inter PLMN ? Assume a scenario, in which LTE UE is connected to its home network and handed over to another network due to mobility.
We consider the SGSN CDRs of Visited Network to generate the TAPOUT for GPRS ( 3G).
In case of LTE Roaming, which nodes CDRs are required and if multiple nodes CDRs are requires then do it requires the correlation as well.
