Future information-oriented Internet architectures are expected to effectively support mobility. PSIRP, an EU FP7 research project, designed, prototyped, and investigated a clean-slate architecture for the future Internet based on the publish-subscribe paradigm. PURSUIT, another EU FP7 research project, is further developing this architecture, which we refer to as Ψ, the Publish Subscribe Internet (PSI) architecture, extending it in various directions, including a deeper investigation of higher

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... (transport and application) and lower layers (e.g., various link technologies, such as wireless and optical). In this paper we present the basics of the Ψ architecture, including the builtin multicast and caching mechanisms, with particular focus on mobility support. We discuss how the native, clean-slate, Ψ instantiation of the information-centric model can support mobility and also present an overlay variant of Ψ we have developed in order to provide an evolutionary path to adoption. Based on analysis and simulation we demonstrate the advantages of the proposed architecture compared to well established solutions such as Mobile IPv6.