What is next for Indoor Localisation? Taxonomy, protocols, and patterns for advanced Location Based Services

Indoor localisation systems have been studied in the literature for more than ten years and nowadays are starting to approach the market. While technology is not mature yet, we can argue that the single biggest obstacle to wide adoption is the lack of standard ways to integrate different systems together. The missing pieces are a common taxonomy, definition of services, protocols. This work is an attempt to define what is next for indoor localisation systems in order to promote market adoption. It is a first high-level attempt at defining a taxonomy of indoor positioning systems, at outlining the main phases of a protocol for the utilisation of different cooperating indoor localisation systems, and at drawing a vision of services and applications in the close future.