fa Smart City Reference Model: Interconnectivity for On-Demand User to Service Authentication ICIE 2016 The Internet of Things and Services (IoTS) has encouraged the development of service provisioning systems in respect to Smart City topics. Most of them are operated as heterogeneous systems which limits end customers’ access and contradicts with IoTS principles. In this paper, we discuss and develop a reference model of an interconnected service marketplace ecosystem. The prototypical implementation incorporates findings from an empirical study and lessons learned from research projects. The elaborated ecosystem enables service request roaming between different parties across system boundaries. The paper presents a feasible centralized architecture, introduces involved parties and parts of a developed message protocol. Why a contracting mechanism is indispensable for request roaming is also outlined. The model’s feasibility is demonstrated by means of a current electric mobility use case: providing access to foreign charging infrastructure without multiple registrations. This work contributes to simplify the data exchange between service platforms to improve Smart City solutions and to support travelers with intelligent mobility applications. The Internet of Things and Services (IoTS) has encouraged the development of service provisioning systems in respect to Smart City topics. Most of them are operated as heterogeneous systems which limits end customers’ access and contradicts with IoTS principles. In this paper, we discuss and develop a reference model of an interconnected service marketplace ecosystem. The prototypical implementation incorporates findings from an empirical study and lessons learned from research projects. The elaborated ecosystem enables service request roaming between different parties across system boundaries. The paper presents a feasible centralized architecture, introduces involved parties and parts of a developed message protocol. Why a contracting mechanism is indispensable for request roaming is also outlined. The model’s feasibility is demonstrated by means of a current electric mobility use case: providing access to foreign charging infrastructure without multiple registrations. This work contributes to simplify the data exchange between service platforms to improve Smart City solutions and to support travelers with intelligent mobility applications. Smart City , Interconnected Services , Connected Mobility , Internet of Things and Services , Fragmented Service Solutions , Smart City , Interconnected Services , Connected Mobility , Internet of Things and Services , Fragmented Service Solutions , 1126 1142 http://system.khu.ac.ir/ijsom/browse.php?a_code=A-10-728-1&slc_lang=fa&sid=1 Michael Strasser Michael Strasser michael.strasser@bosch-si.com 1003194753284600108 1003194753284600108 Yes Bosch Software Innovations, Technical University, Berlin, Germany Bosch Software Innovations, Technical University, Berlin, Germany Sahin Albayrak Sahin Albayrak sahin.albayrak@dai-labor.de 1003194753284600109 1003194753284600109 No Distributed Artificial Intelligence Laboratory, Technical University Berlin, Berlin, Germany Distributed Artificial Intelligence Laboratory, Technical University Berlin, Berlin, Germany