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Content for  TR 26.944  Word version:  16.1.0

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0  IntroductionWord‑p. 6

The Quality of Experience (QoE), End-to-end Service Quality of Service (ESQoS) and System Quality of Service (SQoS) are important factors when introducing services to customers. When the next releases of 3G are launched to the mass market, several new mobile telecommunication multimedia services will be introduced to the general public. It is essential that a high quality if service is experienced by the user of these new 3G services in order to promote the idea of 3G as a global all-purpose communication tool for millions of people with widespread availability of terminal equipment.
The possibility of using multimedia services via 3G in a practical and reliable manner is extremely important in the near future. For these new services, it is certain that a much larger amount of traffic is generated between mobile terminals and services, i.e. traffic within 3G networks and between 3G networks and other networks will be higher than has been the case to date. This gives more importance to service quality requirements.
End-to-end multimedia service performance metrics are proposed to make it possible for operators, device provider and service providers to more conveniently evaluate their service quality as perceived by end-users. This includes:
  • Definition of the performance characteristics that have most relevance to end users (the 'Quality of Experience' or QoE).
  • Definition of the mapping between QoE and end-to-end service measured characteristics (the ESQoS), and mapping between ESQoS and service specific characteristics (the SQoS).
In the present document a top-down approach is used to illustrate the framework of all metrics.
The present document gives metrics of the end-to-end multimedia service performance on 3G networks that support PSS, PSC, video telephony, MBMS and IMS services, etc.
QoE parameters describe the end-to-end quality as experienced by the end users. These are difficult to measure and quantify.
SQoS parameters are metrics that are close related to the network status, and defined from the viewpoint of the service provider rather than the service user. SQoS parameters can be viewed as the inherent attributes of the networks, which are important in guaranteeing QoE requirements of the users.
ESQoS parameters describe the QoS of the end-to-end service. They are obtained directly from the QoE parameters by mapping them into parameters more relevant to operators, service providers and service providers.
In Annex A, PSS is taken as an example; several general models looking at different part of network are given. A mapping between QoE, ESQoS and SQoS is given using a mathematical approach, which defines a dimensioned relationship between user experiences and lower tiers of network performance.
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1  ScopeWord‑p. 8

The present document describes and defines performance metrics for popular multimedia services in 3G networks, including packed-switched streaming service (PSS), multimedia broadcast multicast service (MBMS), video telephony (VT), and IP multimedia subsystem service (IMS). The present document has a top-down approach, which starts with the Quality of Experience (QoE) parameters and metrics, and then provides End-to-end Service QoS (ESQoS) and System Quality of Service (SQoS) parameters and metrics and mapping between these different layers.
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