1 A Pervasive Service Conversations Framework for Ubiquitous Computing Juan Miguel Gómez-Berbís, Ricardo Colomo-Palacios, Ángel García-Crespo Departamento de Informática Universidad Carlos III de Madrid, Spain. {juanmiguel.gomez, ricardo.colomo, angel.garcia}@uc3m.es Christoph Bussler San Jose, California, USA chbussler@bea.com ABSTRACT Pervasive Service Conversations have become a major research challenge for Ubiquitous Computing. They can leverage the ability of companies to streamline business activities, directly or through marketplaces as sellers and buyers, with their trading partners. This paper presents a Pervasive Service Conversation framework based on a real-world scenario which represents a B2B Pervasive Service Conversation, where formal semantics are required to ensure a specific conversation and a common understanding among business partners. The research provides a complete framework based on a conceptual model, BNF syntax, execution semantics, architecture and implementation, which enable unambiguous Pervasive Service Conversations for Ubiquitous Computing, with a focus on B2B transactions. Keywords: Pervasive Services, Ubiquitous Computing, Service Conversation Framework, SOA. Ubiquitous Computing and Communication Journal