This paper presents the concept of a new kind of communication mechanism that we call a communication hyperlink. Using Web mechanisms, communication hyperlinks propose a new communication paradigm by putting back the asymmetry of the Web in the communication world: as a communication end-point, you decide how your correspondent may join you, without giving out any private information, and you provide the caller all the needed communication resources, without the need on his side for any credentials or account information. Since communication hyperlinks can take the form of a simple URL, they can be sent/retrieved using any media, from office documents to Web sites or blogs. When a user clicks on a communication hyperlink, all necessary resources, stored as software components or configuration data on the server, are downloaded and activated -without any need for installing additional software or creating any account for the caller. The paper describes the model and reference architecture implemented for the experimentation of these communication hyperlinks. Considerations on a running experimentation of this approach and associated business possibilities are given. Keywords-hyperlink, communication hyperlink, person-toperson communication, web applications, communication mashups, VoIP I. MOTIVATIONThe explosion of the Web 2.0 phenomenon has dramatically changed the communication service landscape. Historically, telecommunication operators were the only providers of communication services, which were well standardized and interoperable, but hardly open to new entrants. With the bloom of the Internet and later on of the Web 2.0 trends, the communication service landscape has deeply changed, introducing a number of new players and business models on the field, and proposing a profusion of new, featurerich services, and even the means to "mash-up" them with other services from the Web [3] to create new, personalized services exploiting the long-tail.In this paper, we give an overview of the concept of "communication hyperlinks", a scalable and interoperable model that enriches the Web 2.0 by decoupling the way the users publish and advertise the means to communicate with them on the Web, from the actual resources used for this communication. Whereas legacy telecommunication services are symmetrical by nature, it basically applies the asymmetrical Web model to communication services, where information sources serve the necessary resources to the consumers. Within this approach, the user who wishes to be contacted provides the means for this to potential callers, changing from the present communication model where the caller decides to join the callee with his (caller's) own resources, and is potentially ready to pay for that. We call this approach Hybrid Communication, because the user becomes an hybridation of two very distinct facets: communication source and communication consumer.The rest of this paper discusses the communication hyperlink concept. In section II, we discuss the existing approaches to user personal...

The World Wide Web has become an important platform for delivering services in the last decade. Openness and flexibility are indeed key factors for the success of the Web where end-users develop applications freely. As a consequence, end-users become producers and consumers of contents and services. End-users rely for their communication needs on communication platforms (CPs). CPs managed by Service Providers lack sufficient openness and flexibility for end users due to their own complexity. This paper examines the CPs from the perspective of openness and flexibility for end-users, and then proposes a novel concept, My Own Communication Service Provider (MOCSP). The key innovation is to provide an individual CP for an end-user for his/her communication services. To achieve this goal, we design a MOCSP system, based on a top-down and user-centric approach. Moreover, we analyse our approach in terms of benefits for end-users.

To support user mobility across different devices, communication session continuity should be enabled at session initiation and during a session. The session continuity can be managed by either a user or dedicated network nodes such as back-to-back user agent (B2BUA) in IP Multimedia Subsystem (IMS) architecture. When network manages the session continuity, user experience is enriched because users do not need to know how to perform session transfer. However, in IMS architecture, three different network nodes (SIP forking proxy, SIP registrar and B2BUA) need to cooperate for session continuity. When single user (callee) logs in from different devices, it is very hard to achieve cooperation. In addition, these network nodes should be scalable when many users request this service simultaneously. This paper proposes a general architecture that supports the user mobility and how the general architecture can be realized into a Web-based communication system. Our initial analytical result shows that the usage of computing resources (e.g. CPU) is reduced while supporting scalability, thanks to the simple Web client service infrastructure and Web Socket connections on top of HTTP.

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