Slide 33 of 37
Notes:
Unanswered questions still exist in several areas with regard to QoS, such as how to measure and bill for QoS services, as well as how to provide end-to-end QoS when an administrative domain within the traffic path does not participate (or honor) the QoS mechanisms and semantics.
A couple of groups are looking a traffic measurement in the Internet, and perhaps in the future, may also begin to look at how to measure QoS:
The IETF IP Performance Metrics (ippm) working group:
http://www.ietf.org/html.charters/ippm-charter.html
Cooperative Association for Internet Data Analysis (CAIDA):
http://www.caida.org/