A Queue Management Scheme for Alleviating the Impact of Packet Size on the Achieved Throughput

Abstract

The Differentiated Services Network (DiffServ) defines a new framework for the support of quality of service (QoS) in IP-based networks. RIO has received the most attention among all the active queue management mechanisms proposed for assured service in DiffServ environment. This paper proposes the enhanced queue management scheme that can alleviate the impact of flow's packet sizes on the realized throughput. The main feature of our scheme is that it uses not only the average number of total packets existing in a queue but the size of incoming packets, when it calculates the drop probability of OUT packet in core router. The simulation results indicate that our proposed mechanism, when combined with TSW as traffic conditioner, provide better throughput assurance and fair distribution of excess bandwidth independent of packet size of flows in case of well-provisioned network environment. © Springer-Verlag 2004.