1st Annual Conference on Broadband Networks

Research Article

Comparison of QoS schemes for IP-over-optical multilayer networks

  • @INPROCEEDINGS{10.1109/BROADNETS.2004.23,
        author={Takumi Kimura and Keisuke Kabashima and Michihiro Aoki and Shigeo Urushidani},
        title={Comparison of QoS schemes for IP-over-optical multilayer networks},
        proceedings={1st Annual Conference on Broadband Networks},
  • Takumi Kimura
    Keisuke Kabashima
    Michihiro Aoki
    Shigeo Urushidani
    Year: 2004
    Comparison of QoS schemes for IP-over-optical multilayer networks
    DOI: 10.1109/BROADNETS.2004.23
Takumi Kimura1, Keisuke Kabashima2, Michihiro Aoki2, Shigeo Urushidani2
  • 1: NTT Service Integration Laboratories
  • 2: NTT Network Service Systems Laboratories


IP-over-optical multilayer networks are capable of flexibly dealing with traffic increases and fluctuations, because the networks support both high-speed transmission using end-to-end lightpaths and scalable hop-by-hop IP transmission. This paper introduces a differentiated services (DiffServ) architecture for quality of service (QoS) control in such networks. The architecture supports both class-based queues and class-based lightpaths to efficiently handle multiple-QoS-class traffic. QoS schemes based on the proposed architecture are categorized into four types according to their traffic-differentiation and transmission mechanisms. Through simulation, the schemes are evaluated in terms of a measure that largely determines network costs.