Motivation

The QoS testing problem is an important matter when implementing the NGN; it has not been specified, so far. The key information aspect there is signalling systems. Under this Question, QoS test methods are to be developed for traffic-unloaded and traffic-loaded model networks; and also, a DiffServ mechanism test specification is to be created both inside the domain, and end-to-end when using intra-domain communications.

The most important item related to the level of compatibility between different NGN network components is to implement the service level agreements (SLA). Compatible implementation of SLA between different service providers is a necessary condition when testing the NGN network components to tune their operation to greater efficiency. Based on this work item, the SLA types to be tested and testing methods for them are to be defined, inclusive of end-to-end SLAs; and also, some testing specifications are to be created.

One more important point for QoS testing in traffic-loaded model networks is the determination of the traffic arrival process. The appropriate types of traffic arrival process will be recommended for traffic simulation during testing in a model network. Moreover a recommendation will be made for the set of the constituent parts of simulation traffic for testing QoS.

Question

Study items to be considered include, but are not limited to:

• Is the architecture of model networks as defined in Rec. Q.3900 sufficiently advanced for QoS testing?
• What types of tests for QoS could be done in a model network as defined in Rec. Q.3900 for traffic-unloaded conditions?
• What types of tests for QoS could be done in a model network as defined in Rec. Q.3900 for traffic-loaded conditions?
• What is the type of traffic arrival process for simulating traffic load in a model network as defined in Rec. Q.3900 for QoS tests?
• What is the set of constituent parts for traffic-load simulation in a model network as defined in Rec. Q.3900 for QoS tests?
• What are the testing scenarios for QoS testing for intra NGN domain connectivity conditions in a model network as defined in Rec. 3900 for QoS tests?
• What are the testing scenarios for QoS testing for inter NGN domain connectivity conditions in a model network as defined in Rec. Q.3900 for QoS tests?
• What are the types of Services Level Agreements (SLA) which will be tested in a model network as defined in Rec. Q.3900 for QoS tests?
• What are the testing scenarios for SLA in a model network as defined in Rec. Q.3900 for QoS tests?

Tasks

Tasks include, but are not limited to:

• Determination of the types of QoS tests in a model network as defined in Rec. Q.3900 for traffic-unloaded conditions for use in the public telecommunication network.
• Determination of the types of QoS tests in a model network as defined in Rec. Q.3900 for traffic-loaded conditions for use in the public telecommunication network.
• Determination of the types of traffic arrival process for simulating traffic load in a model network as defined in Rec. Q.3900 for QoS testing for use in the public telecommunication network.
• Determination of the set of constituent parts for simulating traffic load in a model network as defined in Rec. Q.3900 for QoS testing for use in the public telecommunication network.
• Development of the testing methodology for intra NGN domain connectivity for QoS testing in a model network as defined in Rec. Q.3900 for use in the public telecommunication network.
• Development of the testing methodology for inter NGN domain connectivity for QoS testing in a model network as defined in Rec. Q.3900 for use in the public telecommunication network.
• Determination of the types of SLA for QoS testing in a model network as defined in Rec. Q.3900 for use in the public telecommunication network.
• Development of the testing methodology for SLA for QoS testing in a model network as defined in Rec. Q.3900 for use in the public telecommunication network.

Relationships

Recommendations:

• Q, Y, H, I, M, F Series.

Questions:

• 1/11 – 5/11, 7/11, 8/11-10/11, 12/11.

Study groups:

• ITU-T Study Group(s) responsible for NGN architecture.
• ITU-T Study Group(s) responsible for multimedia services and applications.

Standardization bodies:

• Organizations such as; IETF, ETSI, Regional SDOs dealing with NGN.