Network virtualization is a technology that enables multiple virtual instances to coexist on a common physical network infrastructure. This paradigm fostered new business models, allowing infrastructure providers to lease or share their physical resources. Each virtual network is isolated and can be customized to support a new class of customers and applications. To this end, infrastructure pro...

This paper presents a novel framework for ubiquitous social networks (USNs). Instead of making virtual connections, on the basis of human social networks, an effort has been made to facilitate interactions among human social networks with the help of virtual social networks. The imperative domains that support ubiquitous social networks are highlighted and different scenarios are provided to pr...

One promising solution to improve the efficiency of wireless networks is to control the number of nodes involved in multi-hop routing by employing virtual backbone. On the one hand, a virtual backbone becomes more efficient as its size is getting smaller. However, as the size of a virtual backbone is getting smaller, the throughput of the virtual backbone is degraded since the length of a routi...

With their widespread deployment, the need to provide QoS in virtual networks is being realized. We show that traditional scheduling algorithms like WFQ are incapable of providing bounded delay service in a virtual network. The problem arises because traffic of a number of sessions sharing a virtual link in a virtual network is aggregated and tunneled through the physical network, which cannot ...

Network Virtualization promotes the development of new architectures and protocols by enabling the creation of multiple virtual networks on top of the same physical substrate. One of its main advantages is the use of isolation to limit the scope of attacks – that is, avoiding traffic from one virtual network to interfere with the others. However, virtual networks are still vulnerable to disrupt...

Performing empirical research requiring numerous interactions with web servers and transfers of very large archival data files without affecting operational information system infrastructure is highly desirable by separating unsteady test-bed environments from steady administrative networks. The key theme of this paper is the building of a virtual network of heterogeneous computing systems usin...

One of the most significant challenges introduced by mobile networks is coping with the unpredictable motion and the unreliable behavior of mobile nodes. In this paper, we define the Virtual Mobile Node Abstraction, which consists of robust virtual nodes that are both predictable and reliable. We present the Mobile Point Emulator, a new algorithm that implements the Virtual Mobile Node Abstract...

Performing empirical research requiring numerous interactions with web servers and transfers of very large archival data files without affecting operational information system infrastructure is highly desirable by separating unsteady test-bed environments from steady administrative networks. The key theme of this paper is the building of a virtual network of heterogeneous computing systems usin...

This paper focuses on the self-organization of ad hoc and hybrid networks. We propose to organize networks with two integrated virtual structures: a backbone and clusters. The backbone helps to optimize the flooding of control packets, and to offer a natural prolongation of the backbone of wired networks. Clusters help to hierarchize the network, each of which is managed logically by its cluste...

This paper presents a technical solution for sensor network monitoring based on virtual instrumentation. Computer developing allows usage of virtual instrumentation for measurement, data acquisition, signal processing, estimation, monitoring, fault detection and diagnosis. The sensor networks may be use as distributed measuring sensors for the physical variables in distributed parameter systems...