QoX：What is It Really?
Cholda,and Andrej Jajszczyk,AGH
University of Science and Technology
• What is QoX
• QoX stands for:
– QoS: Quality of Service
– CoS: Classes of Service
– GoS: Grade of Service
– QoR: Quality of Resilience
– QoE: Quality of Experience
• Three levels of QoS
• Intrinsic QoS
The ability of a network to provide
the functions Related to communicaTion between users
• Perceived QoS
QoS requirements of the customer
QoS offered by the provider
QoS achieved by tne provider
QoS perceived by the customer
six classes:1.Real-time,jitter sensitive , high interaction;2.Realtime,jitter sensitive,interactive;3.Transaction data , highly
interactive;4.transaction data , interactive;5.Low loss only;6.Traditional
applications of default IP network.
The requirement of each service class are described qualitatively as a
tolerance to packet loss , delay and jitter.
There is no strict values or bounds for the parameters per CoS.
GoS and QoR
Applies to circuit switched networks and describes all phenomena
occurring during connection setup , release and maintenance.
Parameters : 1.connection set up delay;2.probability of end-to-end
blocking;3.delay in authentication;4.probability of breaking an active
Network survivability against failures
Parameters: the probability that a service is operational.
The overall acceptability of an application or service , as perceived
subjectively by the end-user
• Factors influencing QoE
• QoE Evaluation Method
Network planning models(belong to Objective testing)