A distributed mapping system to support mobility in identifier/locator separation architecture

The future network will support global roaming seamless and service provider portability. An identifier locator (ID/Loc) separation solution can achieve such a goal. Nevertheless, this ID/Loc separation scheme implies the need of adding a mapping system to store and maintain the binding between locators and identifiers. And this approach may introduce large signaling of the location update and the call delivery into the mapping system. This paper proposed a scalable, robust and high-throughput mapping system. The proposed mapping system consists of a number of three-level tree subsystems, the top-level mapping servers of which constitute a Distributed Hash Table (DHT) ring. To evaluate the efficiency of the proposed distributed mapping system in terms of supporting mobility, we propose a location management mechanism, establish an analytical model, and formulate the location update and the call delivery cost. Numerical results demonstrate that the proposed mapping system can effectively reduce the burden of mapping systems as well as the signaling traffic and achieve greater scalability by supporting a high user density.