Presented by: Saurav Kumar Bengani

1. SeminaronMobile Agent Based Policy ManagementforWireless Sensor Network(Proposed by: ZHOU Ying, Xiao Debao) Presented by: Saurav Kumar Bengani

2. Contents • Introduction • Mobile Agent Technology • Policy Technology • Structural Model of Network Management • Hierarchical Architecture of policy management • Mobile Agent-Based Network Management • Conclusion • References

3. Introduction • WSN network management critical problem when a large number of sensor nodes are involved. • In order to simultaneously satisfy limitations like power constraints, limited bandwidth, distributed coordination and deployment we need an efficient network management in WSN. • Mobile Agent-based policy network management system for wireless sensor networks, which aims at providing effective management mechanism

4. Mobile Agent Technology • Mobile agent is the combination of distributed and artificial intelligence technologies the main concept of it is to execute in distribution. • Mobile agent is a section of code that can implement user tasks autonomously. • A mobile agent can suspend its execution on a node, and then migrate and transfer its code, data state, to another node on the network. • Thus, it can save the network communication bandwidth effectively, and improve the degree of parallelism and real-time performance of the task execution.

5. Advantage of Mobile Agents • Reduce the flow quantity • Integrate with distributed structure seamlessly • Pervasive computing

6. Policy Technology • Policy management is useful in various areas, e.g. Configuration management, Quality of service control , Traffic engineering , etc. • The architectural components of the Policy Framework include a Policy Decision Point (PDP) and Policy Enforcement Points (PEP), and a policy repository. • Network management functionality can be realized by policy agents.

7. Structural Model of Network Management • There are three types of network management structural models: • Centralized: Single Manager Station. • Distributed: Multiple Manager Stations. • Hierarchical: Different level of Manager Stations.

8. Hierarchical Architecture of policy Management The three levels of this hierarchical architecture are Policy Manager (PM) at the highest level, Cluster Policy Agent (CPA), Local Policy Agent (LPA). • An LPA manages a node. • A CPA can manage multiple LPAs. • A PM manages multiple CPAs; it is also a policy agent actually.

9. Mobile Agent-Based Network Management • A complete node in the network includes agent execution environment, policy agent and the real managed node. • The policy information base (PIB) is an ordered set representing data types. • Each agent is kept on standby any time, so the real-time performance is improved effectively. • The common node informs the agent with data to the cluster head after received information.

10. Conclusion • The management system described in this paper shows that a reduction in management traffic overhead can be achievable by mobile agents and policy management. • This architecture reduces the network management requirement for bandwidth, and upgrades the imitativeness, adaptability and re-configurability of network management system. • It has a good practical and research value for geographically distributed network environment.

11. References • Migas N, Buchanan WJ, McArtney K. Migration of Mobile Agents in Ad-hoc, Wireless Networks. Proceedings of the 11th IEEE International Conference and Workshop on the Engineering of Computer-Based Systems (ECBS’04) 2004 • R. Bhatia et al., “Policy Evaluation for network Management”, INFOCOM2000.

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