Quality of Assured Service through Multiple DiffServ Domains

Kazumi KUMAZOE  Yoshiaki HORI  Takeshi IKENAGA  Yuji OIE  

IEICE TRANSACTIONS on Information and Systems   Vol.E85-D   No.8   pp.1226-1232
Publication Date: 2002/08/01
Online ISSN: 
Print ISSN: 0916-8532
Type of Manuscript: Special Section PAPER (Special Issue on New Technologies in the Internet and their Applications)
diffserv,  end-to-end QoS,  AF,  assured forwarding service,  multi-domain,  

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Differentiated Service (DiffServ) is a technology designed to provide Quality of Service (QoS) in the Internet, and is superior to Integrated Service (IntServ) technology with respect to the simplicity of its architecture and the scalability of networks. Although various simulation studies and estimations over testbeds have investigated the QoS that is offered via the DiffServ framework, almost all of them focused on the characteristics in a single DiffServ domain. However, the Internet is actually composed of a large number of AS domains, and thus packets are very likely to arrive at their destinations after going through many different domains. Therefore, we have analyzed the QoS performance in a model consisting of multiple DiffServ domains, and focused especially on the quality provided by Assured Forwarding Service (AF) to achieve statistical bandwidth allocation with AF-PHB. Our simulation results show some throughput characteristics of flows over multiple Diffserv domains, which clarify how network configurations impact the QoS over multiple DiffServ domains.