Enhanced mobility control in mobile LISP networks

The Locator Identifier Separation Protocol (LISP) has been made for scalable Internet routing. In LISP, the mobility control is a host-based scheme in which each mobile node implements the LISP Tunnel Router functionality, and it is also a centralized approach using Map Server (MS) as a mobility anchor for mobile nodes. However, such a centralized scheme has some limitations in terms of scalability and performance. As the number of mobile nodes increases, the control overhead of MS gets larger, since the aggregation of EIDs for mobile nodes cannot be achieved in mobile networks. Moreover, the centralized scheme is subject to services degradation by single point of failure, and increased operational costs. In this paper, we propose the two network-based distributed mobility control schemes for localized mobile LISP networks, LISP-PMIP-Push and LISP-PMIP-Pull, which are designed by referring to the Proxy Mobile IP (PMIP). From the numerical analysis, it is shown that the proposed distributed mobility schemes can give better performance than the existing centralized scheme, and that the pull-based distributed control scheme (LISP-PMIP-Pull) provides the best performance among the candidate mobility schemes, in terms of the binding update and data delivery costs.