**9. References**

72 Telecommunications Networks – Current Status and Future Trends

Fig. 20. Customer satisfaction during a time interval after SLA verification and correction.

interaction between different WSs and attempted solutions.

**7. Conclusion** 

to a centralized SLM&M.

The MOS-AV indicator reflects customer satisfaction. When detection thresholds are exceeded or values of MOS-V become critical, SLA violation has launched the first attempt with confidence and was successful in restoring normal levels of service after 7 seconds. The second violation that requires intervention of Assurance & Fulfilment takes 17 seconds to restore the service. These results are justified by the architecture that used WSOA and

The proposed approach is based on the QoS provisioning architecture proposed by 3GPP with eTOM Assurance capabilities of QoS monitoring. SLM&M uses the new concepts of SOA and BPEL in managing and monitoring network and also must meet several constraints of instrumentation. The first version of the platform was centralized to address all performance data in a central node, this design offered SLA verification but still remained isolated from IMS network and real events. However the IMS network requires

The solution to distribute Resource layer and processes of the eTOM and their adjustments to each layer of the IMS (Access, Control, and Service) is appropriate, as the creation of a WS- Synchronization which synchronizes operations process WS-Resource and their agents in network layer, in addition provides operations in the monitoring layer of SLM & M. The distributed architecture demonstrates its ability in terms of response time and is preferable

The life cycle of SLM&M has three main stages: a real-time monitoring of services and resources to detect anomalies or degradation, followed by a stage of responsiveness to correct troubles, and the final step is to be proactive in order to estimate the behaviour of service and resource by correlation and root cause analysis of service impact. The proactive property will be integrated with QoS mechanisms that predicted from current data, a

permanent and real time monitoring rather than just a sporadic SLA verification.

mathematical model or stochastic processes that come into the perspective.

3rd Generation Partnership Project "Charging rule provisioning over Gx interface (Release 6)", 3GPP TS 29.210 V6.7.0 2006-12, available at

http://www.3gpp.org/ftp/Specs/html-info/29210.htm.

3rd Generation Partnership Project, Evolution of policy control and charging (Release 7), 3GPP TR 23.803 V7.0.0 (2005-09), available at

http://www.3gpp.org/ftp/Specs/html-info/23203.htm.


**Part 2** 

**Quality of Services** 

