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Abstract
This paper presents a centralized approach for establishing end-to-end communication services via management agents. The main proposal is the modular architecture of the third-party based Service Establishment Agent (SEA). The SEA manages inter-provider service negotiation process with per-domain management agents through an appropriate signaling agent. It also receives and interprets end-toend service requests, selects inter-domain paths, performs mapping of service classes among domains on the path, and evaluates conformance of the offered service level with the required one. It allows implementation of different algorithms for the aforementioned functions as well as their selection and combination according to the predefined management policies. Simulation results show that the proposed model significantly outperforms the distributed model in terms of service negotiation times. In the prototype development process, a policy-based solution for mapping of service classes was implemented. The performance evaluation shows that processing requirements for handling multiple service requests are modest, while benefit of the SEA approach is the lack of need to build long-term consensus among providers about technical choices for achieving network interconnection. The SEA architecture is completely independent of the quality of service mechanisms available in particular domains.
Highlights
In the past decade, we have witnessed a great expansion of the Internet Protocol (IP) technology in the information and communication infrastructure of industrial sectors like electric power systems, transportation systems, petrochemical industry, water and waste-water treatment [1]
Simulation results show that the proposed model significantly outperforms the distributed model in terms of service negotiation times
The performance evaluation shows that processing requirements for handling multiple service requests are modest, while benefit of the Service Establishment Agent (SEA) approach is the lack of need to build long-term consensus among providers about technical choices for achieving network interconnection
Summary
We have witnessed a great expansion of the Internet Protocol (IP) technology in the information and communication infrastructure of industrial sectors like electric power systems, transportation systems, petrochemical industry, water and waste-water treatment [1]. The service is usually sold by the domains providing access services This approach requires the specification of a common framework for interconnected networks to provide harmonization of QoS mechanisms implemented in different domains. The centralized approach assumes that a single party (either a provider or a trusted third party) performs service negotiation on behalf of domains under its authority. A single party is responsible for E2E service definition, service class mappings, inter-provider measurements and management of business processes Benefits of such an approach refer to avoiding the need for direct negotiation among providers or re-engineering of their networks. The centralized approach assumes that the 3P agent has complete overview of each domain under its authority, which can be critical if a provider denies sharing the required data for commercial or strategic reasons. The rest of the paper is organized as follows: Section 2 surveys the related work; Section 3 proposes the SEA architecture and describes its modules and their interrelations; Section 4 contains the analysis of signalling requirements starting from a single signalling transaction, and followed by an in-depth simulation study of the two realistic Internet topologies; Section 5 describes the SEA prototype development by presenting the overall software structure and performance evaluation; Section 6 concludes the paper
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