Performance of fair queuing with in/out bit in core stateless networks

The differentiated services (diffserv) architecture has been proposed for i mplementing scalable service differentiation in the Internet. Expedited for warding and assured forwarding have been standardized as Per-Hop Behaviors (PHB) in diffserv. Assured forwarding can be utilized to realize the servic e, which provides each user with a minimum guaranteed rate and a fair share of the residual bandwidth. We call it guaranteed rate (GR) service. With G R service, each packet for flow i is marked in or out based on comparison b etween the sending rate and the minimum guaranteed rate. When congestion oc curs in networks, out packets are dropped more aggressively than In packets . Recently, several fair queuing schemes have been proposed for core statel ess networks. They can achieve fairer bandwidth allocation than random earl y detection (RED). However, there have not been any studies that consider i n/out bit usage to support GR service. This paper proposes how to extend th e schemes that have been proposed for core stateless networks to allow the support of in/out bit usage. We present the performance of one of the exten ded schemes and compare the scheme to RED with in/out bit (RIO) in terms of fair bandwidth allocation.