(New question)

Type of question

Task oriented designed to lead to new ITU-T Recommendation(s).

Background

A major challenge for emerging IP-based networks is to provide adequate Quality of Service (QoS) for different services and applications. Much of the current industry activity on QoS is focused on providing QoS control mechanisms in IP networks, but there has been less attention on defining what the actual performance targets should be. To do this requires a detailed knowledge of the performance requirements for particular services and applications. The starting point for deriving these performance requirements is the user.

Text of the question

Considering

that QoS/Performance is a key issue in IP networks;

that there is an urgent industry need for guidance on performance requirements for a range of multimedia applications, both in wireline and wireless scenarios;

that performance requirements for specific media may be subdivided to provide some level of performance differentiation for that media (see ITU-T Rec. G.109);

that detailed requirements for voice have been or are currently being addressed in other Questions within SG12;

that the starting point for deriving performance requirements is the user perception;

that expertise in deriving performance requirements based on user perception is a well-established core competency of SG12;

that there may be a difference between performance requirements at the user/application level and those at the underlying network transport level.

- what are the key performance parameters and what are suitable values of these parameters for IP multimedia applications and services ?

Study items

Identify examples of multimedia applications and services (interactive, streaming, browsing, e-commerce, file transfer etc) and the underlying media involved (voice, video, still image, text, data etc).

Define the key performance parameters at the user/application level.

Define suitable ranges of values for these parameters on an end to end basis, demonstrating performance differentiation where applicable.

Determine how these requirements can be related to the underlying network transport level.

Objectives and schedule

It is anticipated that the study will result in new ITU-T Recommendation(s).

The estimated time frame for the first Recommendation is less than one Study Period, with the need for on-going study and updates likely.

Relationship with other activities

• With other ITU-T Study Groups: SG 2, SG 9, SG 13, SG 16, SSG
• With other Bodies: ETSI EP TIPHON, ETSI TC STQ, TIA TR-41, IETF, 3GPP, 3GPP2