To meet the increasing demand for real-time content delivery, the proposed autonomous decentralized community communication system offers an efficient information dissemination infrastructure with a decentralized architecture. ADCC's aim is to help end-user communities communicate and exchange information efficiently; to meet this goal, the system uses an application-level multicast technique that arbitrarily scales to large groups. The ADCC system also features a scalable community construction and maintenance scheme that eases the burden of organizing an online community network.