Implementation and Evaluation of LISP Publish/Subscribe

The design of future 6G network will push even further the convergence of different types of mobile networks, integrating space, aerial and terrestrial access. Mobility, remains one of the most difficult aspects to tackle in this context. One approach under consideration is the use of an overlay solution able to cope with new mobility requirements. LISP (Locator/ID Separation Protocol) being one candidate overlay protocol. LISP separates the addressing space in two orthogonal spaces, one to identify end points, the other to locate them. End-to-end communication is guaranteed by a mapping system allowing to associate location with identities. Mapping resolution is done at communication setup, opening the question: how to guarantee that, in case of changes, the latest mapping is used? Originally, there was no mechanism to explicitly express the interest in updates of specific mappings. LISP Publish/Subscribe has been introduced in order to provide such a feature. This paper provides an implementation of LISP Publish/Subscribe in the NS-3 simulator and quantitatively analyze its benefits.