A traffic control system to manage bandwidth usage in IP networks supporting Differentiated Service

Abstract — This paper presents a traffic control agent that can perform the dynamic resource allocation by controlling traffic flows on a DiffServ network. In addition, this paper presents a router that can support DiffServ on Linux to support selective QoS in IP network environment. To implement a method for selective traffic transmission based on priority on a DiffServ router, this paper changes the queuing discipline of Linux, and presents the traffic control agent so that it can efficiently control routers, efficiently allocates network resources according to service requests, and relocate resources in response to state changes of the network. Particularly for the efficient processing of Assured Forwarding(AF) Per Hop Behavior(PHB), this paper proposes an ACWF2Q+ packet scheduler on a DiffServ router to enhance the throughput of packet transmission and the fairness of traffic services. Keywords: QoS, PHB, DiffServ, ACWF2Q