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TR 23.802 (SA2)
Architectural enhancements for
end-to-end Quality of Service (QoS)

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(W-zip) V7.0.0    2005/10    57 p.


Rapporteur:  Mr. Jaksa, Robert
See also:  –


The exclusive usage of QoS mechanisms as described in TS 23.207 is not enough to guarantee full end-to-end QoS when interworking with external IP network domains, e.g. in those backbone networks which do not themselves contain IMS network elements. This is mainly because the described QoS concept presumes that the interconnecting IP networks are controlled by PLMN operators or other IMS operators. As a result, it is problematical to provide complete end-to-end QoS guarantees when interworking with external IP network domains or backbone networks which provide IP QoS mechanisms.

Especially for delay-sensitive services with strict end-to-end QoS requirements such as conversational speech or streaming video, the existing QoS concept may not satisfy the service requirements when interworking with such IP network domains and backbone networks. Consequently, new QoS concepts that are scalable and can take into account overall end-to-end network performance must be assessed.

This TR investigates possible solutions to enhance the end-to-end QoS architecture as currently specified in TS 23.207 to achieve improved end-to-end QoS in the case of interworking with IP network domains or backbone networks that provide IP QoS mechanisms and enhanced interworking with other next generation networks. Within this technical report, emerging QoS standardization efforts from TISPAN, ITU-T, and the IETF should be taken into account.


 

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1   Scope   Word-p. 7
2   References
3   Definitions and abbreviations   Word-p. 8
4   General requirements
5   Architectural concept
5.1   General end-to-end QoS reference model
5.2   Connection models   Word-p. 14
5.3   Issues of connection models   Word-p. 20
5.4   Architecture for off-path IP QoS interaction between UMTS network and external IP network
5.5   Architecture for on-path IP QoS interaction between UMTS network and external IP network   Word-p. 24
5.6   Architecture for hybrid-path IP QoS interaction between UMTS network and external IP network   Word-p. 29
5.7   Characteristics of different IP QoS architectures
6   Procedures      Up
7   Message flows   Word-p. 36
8   Security aspects   Word-p. 48
9   Charging aspects      Up
10   Conclusions and recommendations
A   QoS conceptual models   Word-p. 50
B   Examples of QoS provisioning schemes   Word-p. 52
C   Change history   Word-p. 57

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