Netrawalm: Network Based Resource Aware Application Layer Multicast for Multiparty Video Conference

IP Multicast is one of the most absolute method for large bandwidth Internet applications such as video conference, IPTV, E-Learning and Telemedicine etc., But due to security and management reason IP Multicast is not enabled in Internet backbone routers. To achieve these challenges, lot of Application Layer Multicast (ALM) has been proposed. All the existing protocols such as NICE, ZIGZAG and OMNI are trying to reduce average delay by forming a Multicast tree. But still that problem has not been addressed fully. We are proposing a new protocol called NetRawALM, which will address the average delay, Reliability between nodes, Scalability of conference, Heterogeneity and resilient data distribution for real time multimedia applications by constructing the Network based Resource aware Multicast tree algorithm. This is very dynamic and decentralised. The proposed architecture is a LAN aware; it is used to reduce Internet Traffic

APPLICATION LAYER MULTICAST FOR EFFICIENT GRID FILE TRANSFER ∗

Multicast communication model can be efficiently exploited by grid systems to improve the performance of many basic operations, like file transmission, replica management or resource discovery. However, IP multicast presents important limitations to be adopted in grid environments, since it is not fully supported in the Internet and is incompatible with TCP-based applications. In the last few years, Application Layer Multicast (ALM) have emerged as an alternative technology to develop one-to-many and many-to-many applications, where multicast functionality is handled by the end hosts, instead of by the network routers. While ALM has been proved to be efficient for streaming audio/video, content distribution, or videoconferencing applications, its utilization in grid environments has not been deeply explored. In this paper we analyze the application of ALM techniques to improve the efficiency of file transfer operations in computational grids. Results will prove that ALM can obtain an important reduction of overall transmission time, in comparison with unicast transmission, and a better balance of network traffic among participants