Performance of a tiered architecture to support end-host mobility in a locator identity split environment

For all Locator Identity Split protocols to work, a mapping infrastructure is required to maintain the binding between the Locators and Identifiers. However, the mapping infrastructure naturally becomes one of the main scalability concerns when there are a large number of mobile nodes to support. This paper implements and evaluates a tiered architecture in which the mapping infrastructure is divided into a core mapper and an internal mapper such that it can support a large number of mobile nodes and providing up-to-date mapping records. The GSE/8+8 rewriting approach is used to underpin the routing within the tiered architecture. The core mapper uses a Chord DHT and the internal mapper is a hierarchy of routers with rewriting capability. The tiered architecture is simulated in OMNeT++. The simulation results show the tiered architecture is a viable solution for scaling the mapping infrastructure to support a large number of mobile nodes.