Receiver-driven congestion control for content oriented application with multiple sources

In content oriented application, such as P2P, a user does not care about where content is obtained and a content file can be downloaded from anywhere it is obtained. In some P2P systems, e.g. BitTorrent, a content file is divided into small parts, chunks, and each chunk is downloaded from anywhere. In this many-to-one communication style, one TCP session is set up for each pair of a sender and a receiver. If these sessions go through the same bottleneck link, many-to-one communication might obtain unfairly large throughput. In this paper, we propose a new receiver-driven congestion control for this many-to-one communications. Our proposed congestion control detects bottleneck-sharing flows and clusters them. Window coupling technique is applied for these clustered flows, which enables these flows to obtain fair aggregated throughput. Our simulation results show that our proposed receiver-driven congestion control fairly shares a bottleneck link with regular TCP.