QoX ： What is It Really?

1. QoX：What is It Really? 原作者：Rafal Stankiewicz,Piotr Cholda,and Andrej Jajszczyk,AGH University of Science and Technology 汇报人:马林

2. Introduction • 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

3. QoS • Three levels of QoS • Intrinsic QoS • The ability of a network to provide the functions Related to communica- Tion between users • Perceived QoS • QoS requirements of the customer • QoS offered by the provider • QoS achieved by tne provider • QoS perceived by the customer

4. CoS • ITU-T • six classes:1.Real-time,jitter sensitive , high interaction;2.Real-time,jitter sensitive,interactive;3.Transaction data , highly interactive;4.transaction data , interactive;5.Low loss only;6.Traditional applications of default IP network. • IEFT • 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.

5. CoS • 3GPP • Four classes:1.Conversational;2.streaming;3.Interactive;4.Background • IEEE:

6. CoS

7. GoS and QoR • GoS • 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 connection. • QoR • Network survivability against failures • Parameters: the probability that a service is operational.

8. QoE • Definition: • The overall acceptability of an application or service , as perceived subjectively by the end-user • Factors influencing QoE

9. QoE • QoE Evaluation Method • Subjective testing • Objective testing • Network planning models(belong to Objective testing)

10. The end!Thank you!