MODELLING AND SIMULATION OF AN ALARM BASED NETWORK MANAGEMENT SYSTEM FOR EFFECTIVE SLA MONITORING AND MANAGEMENT

摘要

Modelling and Simulation is increasingly becoming popular in the design process of dynamic network systems. In network management, simulation analysis helps to validate the network models as well as enhance network service operations. In this paper we present simulation as an important process in understanding and analysing SLA management and monitoring. In general, simulation studies are not conducted by various service providers to the fullest possible extent and this leads to poor customer satisfaction. We describe the phase where simulation needs to be performed and what aspects of SLA management has to be simulated. A simulation model for SLM is constructed. We identify alarms as an important tool in effective network resource management. We use a simple case study that describes the need for simulation in effective SLA documentation and SLA monitoring. We analyse different scenarios within SLA levels using ARENA simulation software and demonstrate how it helps in identifying end user services and satisfying customer expectations. The model helps to better understand critical areas in SLA such as alarm monitoring, metrics to be monitored and reduce resource overuse. Through this approach we can perform successful simulation studies, identify the right simulation software for simulating every aspect of SLA management. The model is validated using sensitivity analysis, queueing principles and visualization using animation and hence our experimental results are both valid and reliable. A brief discussion of visual basic modules available in ARENA and its role in conducting network simulation studies has also been presented.