Notes
Outline
QoS - the most inter-disciplinary subject ever?
Jon Crowcroft
UCL, CS
Jon@cs.ucl.ac.uk
Performance Against Goals
What we tried:
QoS and IP – a subject with a great future behind it
Intserv,diffserv,measurement based admission control, price based admission control, mpls, traffic engineering, qos routing, red ecn etc etc etc.
Performance Against Schedule
Parekh’s thesis 8 years old
RSVP 9 years old
WFQ/SFQ/and Class of Service have been around for over a decade
Performance Against Quality
Work in each area is ok, but is in isolation from the big picture – how can we fix this?
Raise the entry bar to QoS proposals.
There’s plenty of gold in “them there nets”
Can we leverage some of it for QoS in the future?
Research & Development
Need to know:
Networks (telecom,ip,fr,atm,etc)
Control & Queueing theory
Economics&Law
Human Factors
Computer Systems
Physics…
Recommendations
Need to combine these expertise (c.f. Communications Systems Research Centers in Columbia, in Cambridge)
Need to be open to adding more disciplines as needed
Need to recognize non-problems (e.g. “over-provisioning” is often a reasonable solution).
Questions & Comments
Top slicing e-commerce….