Ad Hoc Collaboration and Information Services Using Information Clouds Andreas Heinemann * Jussi Kangasharju Fernando Lyardet Max M¨ uhlh¨auser Telecooperation Group, Department of Computer Science Darmstadt University of Technology Alexanderstr. 6, 64283 Darmstadt, Germany aheine@gkec.tu-darmstadt.de { jussi, fernando, max }@tk.informatik.tu-darmstadt.de Abstract Future wireless communication environments offer many possibilities for new services. Users will not be satisfied with simply being connected, but they will require useful services built on top of the wireless networks. iClouds is an architecture which offers spontaneous mobile user interac- tion, collaboration, and transparent data exchange in mobile ad hoc net- works. In this paper we present several services which we have built on top of the basic iClouds architecture. We have built a basic information exchange service, an information sprinkler, a virtual notice board, and an advertisement service which can significantly increase the coverage of advertisements. 1 Introduction Wireless ad hoc communications offer many new ways for collaboration and information delivery. Given the success of wireless communications, such as mobile telephones, 802.11b, or Bluetooth, the demand for advanced services built on top of these ad hoc communication networks is likely to be high. Users will not be satisfied with simply being connected all the time; they will also require services that help them in their daily lives. In this paper we present a set of services that can be deployed on our iClouds architecture [5]. iClouds is an architecture which supports mobile user interac- tion, collaboration, and transparent data exchange. The motivation behind the iClouds architecture can be expressed as follows: “Whenever there is a group of people, they will most likely share common goals * The author’s work was supported by the German National Science Foundation (DFG) as part of the PhD program “Enabling Technologies for Electronic Commerce” at Darmstadt University of Technology