Mobility support in the internet using identifiers

To support mobility in the Internet is becoming an urgent need in the near future. So far a large number of solutions are proposed providing various methods, but there still exist many open questions on how to add the new feature of mobility into the Internet architecture. In this paper we pay attention to the approaches with a new identifier namespace introduced. We give an overview to such schemes followed by a qualitative comparison, to find out that they differ in many aspects in achieving various design goals. We then focus on core mobility mechanisms of the proposals and abstract their common elements to form an overlay network called ION. By preliminary analyze on ION, we argue that a particular key point towards better identifier-based mobility support is to balance the tradeoff between mapping dynamics and routing path stretch in the overlay. Though lack of detailed modeling and data support (which is in our future work), we consider the viewpoint in this paper to be useful in designing of new identifier-based mobility methods.