Toke
On 27 Apr 2015, at 15:22, Toke Høiland-Jørgensen <[email protected]> wrote: > Neil Davies <[email protected]> writes: > >> You'll find the way that ∆Q can be decomposed into basis set of ∆Q|G, >> ∆Q|S and ∆Q|V - helps work out which parts of the budget get eaten up >> by different elements of the network design/architecture. > > Right, I got that part. What I'm missing is how you define the actual > measure for ∆Q -- but that is application dependent? E.g. for web sites > it might be load time, for VoIP it might be MOS score? > > -Toke For VoIP the aspects of ∆Q that are of interest (after the total one way delay) are the delay variance and loss rate - take a look at https://ivanovic.web.cern.ch/ivanovic/articles/open-2004-007.pdf (which is the tech report behind what was published in SPECTS'03 (Beuran, R., Ivanovici, M., Dobinson, B., Davies, N., Thompson, P.: Network Quality of Service Measurement System for Application Requirements Evaluation) In other aspects it might be "time to first frame" (VoD) or "possibility of a buffer starvation event per operating hour" (VoD) the QoE (Qualty of Experience) metric needs to be one that has a relationship with the users' perception.] Neil _______________________________________________ Bloat mailing list [email protected] https://lists.bufferbloat.net/listinfo/bloat
