Abstract

The enormous growth and the dynamism of the Internet initiated various new trends that reflects the need for powerful communication methods than the simpler client/server and Peer-to-Peer architecture. Despite their great potential, these systems still lack e#cient data dissemination mechanisms. They deliver the information considering the users' demands regardless of their situations. There is no discernment between di#erences in place and time; users in any situation receive the same contents. However, situation and context-aware dissemination-oriented cooperative services motivate an increasing interest for evolving both the social and economic environments. Therefore, this thesis proposes the following community communication architecture and two community technologies to assure information dissemination by realizing the Timeliness, Scalable online-expansion and Fault-tolerance requirements in the large-scale and dynamic environment. The dissertation proposes an Autonomous Decentralized Community Communication System (ADCCS) and illustrates the concept, system architecture and technology of the ADCCS that permits to e#ciently disseminate data according to the current situations of the system. Considered changing situations are changes of the community members' demands and situations (location, time), and the status of community nodes and logical links. The leading concept of autonomous community communication is the autonomy of the community nodes in recognizing members from non members, organizing the Community Overlay Network (CON ) and achieving an e#cient community communication based on local data, so that self-organized and self-adaptable ADCCS can be procured. Two techniques are proposed to satisfy the requirements mentioned before. First, Service-Oriented mu...

Citations