Design of the Central LISP Management System for the Software-Defined Wireless Network (SDWN)

The Software-Defined Wireless Network (SDWN) has been considered as a feasible solution in order to make a fast deployment of new solutions and services; however, there is a performance degradation problem when SDWN is designed with the current IP address scheme requiring an extra operation cost to maintain a location management system. In order to improve mobility management in a SDWN, we realize the centralized LISP (Locator/ID Separation Protocol) management system with the following features: 1) the LISP/OpenFlow centralized control entity and 2) interoperability with standard LISP systems. It is named LISP-SDWN and it is a double separation solution based on Control/Data decomposition and Locator/ID separation. The operation cost might decrease because ID of the Mobile Node (MN) does not change during handover across heterogeneous Radio Access Networks (RANs) in a SDWN. The major contributions of our research are that there will be no modification requirement of the LISP functions during LISP deployment in a SDWN and there will be a capability for inter-networking with external LISP sites operated by other service providers. Performance evaluation of LISP-SDWN is carried out with LISP, LISP Controller, MIPv6 and HMIPv6. Result shows that the proposed LISP-SDWN is a feasible and practical solution for a SDWN provider.