Virtual networks are an important tool for deploying new services on top of the Internet. We present the TAO algorithm to automatically manage the topology of virtual networks, allowing nodes to be added and removed automatically, and adjusting the topology to optimize performance. By automating the tasks of maintaining the set of nodes and configuring the tunnels between them, we can reduce th...

It is common to call “virtual world” the set of abstractions given to humans by computers and networks. When the computers and the networks are emulated by programs, i.e. are virtual machines and virtual networks, there is one more layer of virtuality: a kind of virtual squared world. Virtual square (V ) is the project to study how to exploit the possibilities given by multi layered virtuality....

One of the main objectives of cloud computing providers is increasing the revenue of their cloud datacenters by accommodating virtual network requests as many as possible. However, arrival and departure of virtual network requests fragment physical network’s resources and reduce the possibility of accepting more virtual network requests. To increase the number of virtual network requests accomm...

Nowadays, resource allocation for virtual networks (VNs) is brought as an imperative problem. For the characteristics of virtual networks, multiple virtual networks with different topo can co-exist on a shared infrastructure. A difficult point of problem is how to use the resource effectively and to satisfy the requirement of virtual network request. This problem is NP-hard. In this paper, we i...

The deployment of network architectures is often manual, adhoc and time consuming. In this paper we introduce a new paradigm for automating the life cycle process for the creation, deployment and management of network architectures and envision programmable networks capable of spawning distinct “child” virtual networks with their own transport, control and management systems. A child network op...

Readings: Compulsory protocols H̄atzis, Pentaris, Spirakis, Tampakas, Tan. Fundamental control algorithms in mobile networks. Chatzigiannakis, Nikoletseas, Spirakis. On the average and worse-case efficiency of some new distributed communication and control algorithms for ad hoc networks. Chatzigiannakis, Nikoletseas, Spirakis. An efficient communication strategy for ad-hoc mobile networks. Chatz...