>> Study Group 12 :
Performance and quality of service
Question 11/12 - QoS interworking and apportionment of performance parameter values between networks
(Enlarged continuation of Question 11/12)
Motivation
With the increasing industry focus on Next Generation Networks (NGN), there is a need for guidance on the associated end to end QoS and performance issues for multimedia services (e.g. voice, video, and data) carried by NGN's, in order to ensure customer satisfaction. This includes interworking aspects between different networks (e.g. cellular, wireless, wireline) and apportionment of performance parameter values between different network segments.
NGN QoS Interoperability Issues requiring consideration include but are not limited to:
- End to end IP based multimedia services inter-network (cellular/wireless/wireline) interoperability issues, including
- definition of interworking functions
- impacts of interworking functions
- Apportionment
- Static and dynamic apportionment of performance parameter values across networks (cellular, wireless, wireline access and backbone networks)
The following major Recommendation, in force at the time of approval of this Question, falls under its responsibility: G.175
Question
Study items to be considered include, but are not limited to:
- What guidance can be provided in transmission planning for the interconnection of multiple IP based networks ?
- What are the main performance parameters in end-to-end IP based networks and how can can the values of performance parameters be apportioned across multiple network segments?
- How can the cases of multiple concatenated networks be considered, based on a flexible apportionment of transmission impairments in contrary to a rigid partitioning of parameter values ?
- Which Interworking Functions are required to support interfacing between cellular/wireless/wireline networks sufficient to enable service providers to comply with end to end performance objectives for the QoS classes and to take into consideration the network performance parameters across network sections?
- From an end to end performance perspective, what impacts will be realized by the incorporation of interworking functions between different networks sections (e.g. cellular, wireless, wireline networks)?
Tasks
Tasks include, but are not limited to:
- Analysis of end to end QoS aspects of interworking between different network sections (e.g. cellular, wireless, wireline networks).
- Revisions of ITU-T G-Series Recommendations as may be needed to accommodate end to end QoS interworking between different network sections (e.g. cellular, wireless, wireline networks).
- Development of new Recommendations specifying interworking functions and methods between different network sections (e.g. cellular, wireless, wireline networks).
- Development of new Recommendations specifying performance parameter apportionment functions and methods between different network sections (e.g. cellular, wireless, wireline networks).
Relationships
Recommendations: G.100- and G.1000-series
Questions: 2/12, 10/12, 17/12
Study Groups: SG 2, SG9, SG 11 SG 13, SG 15, SG 16
Standardisation bodies: ETSI STQ, ETSI TISPAN, TIA TR-41, ATIS PRQC, IETF
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