Sunday, January 30, 2011

QoS solutions

The research project MUSE defined a QoS concept in Phase I which was further worked out in another research project PLANETS. The new idea of this solution is to agree on a discrete jitter value per QoS class which is imposed on network nodes. Including best effort, four QoS classes were defined, two elastic and two inelastic. The solution has several benefits:

    * End-to-end delay and packet loss rate can be predicted
    * It is easy to implement with simple scheduler and queue length given in PLANETS
    * Nodes can be easily verified for compliance
    * End users do notice the difference in quality

The MUSE project finally elaborated its own QoS solution which is primarily based in:

    * The usage of traffic classes
    * Selective CAC concept
    * Appropriate network dimensioning

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