2.12 Topology Hiding

In various interworking scenarios LTE service providers need to protect their networks. The Topology Hiding features remove or hide all Diameter addresses from messages being routed out of the home network on connections with this feature enabled. This feature also re-inserts the appropriate addresses in messages coming back into the home network on these connections. In addition, peer networks are prevented from determining the topology of the home service provider’s network by obscuring the number of host names in the network. As a result of this, the peer network service provider is not able to determine how many MME/SGSNs, HSSs, PCRF, AFs, and pCSCFs are deployed. Nor can the peer service providers derive any deployment architecture information through inspection of host names.