This paper presents an architecture to provide endto- end per-user services with support to client mobility, designed according to the SDN and NFV paradigms. Our service platform dynamically configures and launches service requests when the client connects to the network, which are used by a multidomain orchestration system to arrange the required network configuration and computational resources. Service configuration is dynamically updated when a movement of the client is detected, that is, when a client device changes its access point to the network. A prototype implementing the idea has been developed and validated over JOLNET, a real, geographical, OpenFlowbased experimental network connecting several sites in Italy and operated by Telecom Italia.

The existing Internet ecosystem is a result of decades of evolution. It has managed to scale well beyond the original aspirations. Evolution, though, highlighted a certain degree of inadequacies that is well documented. In this position paper we present the design considerations for a re-architected global networking architecture which delivers dissemination and non-dissemination objects only to consenting recipients, reducing unwanted traffic, linking information producers with consumers independently of the hosts involved, and connects the digital with the physical world. We consider issues ranging from the proposed object identifier/locator split to security and trust as we transition towards a Network of Information and relate our work with the emerging paradigm of publish/subscribe architectures. We introduce the fundamental components of a Network of Information, i.e., name resolution, routing, storage, and search, and close this paper with a discussion about future work.

In this paper authors examine benefits and motivations for the Information-Centric Networking (ICN) concept [1][2] under the point of view of an Internet Service Provider (ISP). A proposal for a Global Information Network (GIN) is advanced, which should follow a standardization path. Authors believe that ICN will enable ISPs to provide native support to typical data dissemination services (e.g. file sharing, distributed storage, caching, instant messaging, VoIP, etc.) currently provided by overlay networks and P2P applications (e.g. eMule/eDonkey [3], BitTorrent [4], Kazaa [5], Skype [6], Akamai [7], etc.). This will be possible by integrating most of the basic features of the current P2P overlay networks into the ISP's network infrastructure. As a result, new advanced communication services will be offered at a new networking layer, sitting on top of a transport infrastructure, based either on IP or whatever new transport technology. The potential of this change in the Internet architecture could be dramatic, since ICN impacts both the communication model and the network infrastructure. Furthermore, it is foreseeable that the business relationships among most of the actors (customers, network providers, ISPs, content providers, search engines) will be also deeply changed.

This paper is concerned with the ATM traffic characterization within the network. Most of the work performed up to now has studied the effects of traffic on the access multiplexer and the first switch of an ATM network. Various source models were assumed to generate the ATM traffic. So, while the performance of a single switch node has been exhaustively examined, the statistical behavior of the traffic modified as it crosses the network has not been thoroughly analyzed yet. This paper, through an analysis of a network of cascaded queues, indicates that limit distributions exist in the statistical behavior of the traffic streams and in the queue performance, although a formal proof is believed to be very hard to obtain. The first modelling step consists of deriving the exact interdeparture time distribution for the cells of a reference-connection arriving to the output queue of a switch node with a general interarrival time distribution and multiplexed with a background traffic stream. The analysis is iterated through a long sequence of cascaded output queues, until the interdeparture time distribution converges. Simulations show that the analytical results are accurate at each stage of the network under the hypothesis of independent queues, and are also good approximations in the case of correlated queues. This study shows that the queue performance at the limit point is always better than the M/D/1 case. The distributions found in this way depend only on the connection bandwidth and on the background traffic behavior. The initial characteristics of a connection (burst length distributions and burst interarrival time distributions) only influence the convergence speed, not the limit distribution.

This paper proposes a methodology for performing an evaluation and optimization of the cost of an ATM switching architecture under performance constraints given in terms of virtual connection blocking probability. An analysis of blocking networks is developed, and combined with known results concerning nonblocking networks, provides a theoretical model which relates traffic characteristics, network topology and blocking probability in a multirate/multiservice broadband environment. An analysis of the characteristics determining the cost of a generic ATM switch implementation follows. The model is oriented to optimize both the topological parameters and the speed advantage, with respect to the main cost factors of VLSI-based switching networks i.e., components count and complexity, interconnection costs.>

The authors propose a methodology for performing an evaluation and optimization of the cost of an asynchronous transfer mode (ATM) switching architecture under performance constraints given in terms of virtual connection blocking probability. An analysis of blocking networks is developed and combined with known results concerning nonblocking networks that provide a theoretical model which relates traffic characteristics, network topology, and blocking probability in a multirate/multiservice broadband environment. An analysis of the characteristics determining the cost of a generic ATM switch implementation follows. The model is oriented to optimize both the topological parameters and the speed advantage, with respect to the main cost factors of VLSI-based switching networks.>