Peer-to-Peer Overlay for the IP Multimedia Subsystem

Peer-to-Peer Overlay for the IP Multimedia Subsystem

Ling Lin (Vodafone Group, UK) and Antonio Liotta (Eindhoven University of Technology, The Netherlands)
Copyright: © 2012 |Pages: 25
DOI: 10.4018/978-1-4666-1613-4.ch002
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Abstract

The growth of the Internet and its popular services are forcing telecom operators to provide advanced services to their subscribers, as traditional voice services are no longer enough to attract more customers. To enable more innovative and value-added IP services and take advantage of the services that the Internet provides, the IP Multimedia Subsystem (IMS) is introduced. The IMS provides a complete access-agnostic architecture and framework that facilitates the convergence of the mobile network, removing the gap between the two most successful communication networks: cellular and Internet network. The harmonized All-IP platform has the potential to provide all Internet services with a more cost-effective and more efficient architecture than the circuit-switched networks do. However, by merging two of the most successful networks, the integration of two network models with different concerns and motivations is not without its problems, among which, the scalability issue is the most essential when supporting content delivery services. The purpose of this chapter is to study and design a new content delivery network infrastructure, PeerMob, merging the Peer-to-Peer technology with the IMS framework, which benefits IMS with scalability, reliability, and efficiency features coming with decentralized P2P architecture. The chapter also puts this P2P IMS paradigm under realistic network conditions and strenuous simulation to evaluate the performance of the P2P IMS system.
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Main Contributions

Concerning the scalability issues in the IMS, the purpose of this chapter is to study and design a new content delivery network infrastructure, PeerMob, by merging the Peer-to-Peer (P2P) technology with the IMS framework, which benefits the IMS with scalability, reliability, and efficiency features coming with a decentralized P2P architecture.

Generally speaking, P2P is a technology that fosters resources self-deployment and self-organization, while still achieving optimized resource utilization for the deployed applications and services. P2P is designed for sharing computer resources, CPU power, storage and bandwidth, by direct exchange, rather than requiring the mediation or support of a centralized server. P2P architectures are characterized by their ability to adapt to failures and accommodate transient populations of nodes while maintaining acceptable connectivity and performance. The use of the P2P paradigm to provide content delivery services is gaining increasing attention, and has become a promising alternative to other legitimate approaches as the classical client-server model or Content Delivery Network (CDN).

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