A large scale data transfer method with a dynamic window control to reduce reservation bandwidth in diffserv AF networks

Many applications, such as pipeline processing in large-scale grid computing and network storage, transfer large amounts of data over wide area networks. In the future, these applications should be able to reserve less bandwidth than they currently need to meet job schedules. As a step towards this improvement, we have developed a data transfer method that uses less reservation bandwidth on DiffServ AF networks. Our method consists of a dynamic QoS control method and a data transfer protocol that uses two kinds of TCP connection with dynamic window control. We simulated the transfer of data using our method on a network simulator and found that it performed better than current methods. By enabling throughput close to the reservation bandwidth, our method will reduce the cost to network providers of meeting service-level agreements with customers.