The technique of Virtual Paths is used in ATM networks to perform bandwidth allocation for virtual circuits and to simplify setting up of virtual circuits in response to connection requests. In this paper, we describe a new technique called Virtual Trees that can be used for bandwidth allocation in ATM networks. A Virtual Tree corresponds to pre-allocated bandwidth along a set of links in the n...

The use of virtualization technologies to increase the capacity and utilization of laboratory resources is widely used in classroom environments using several workstation based virtualization products. These virtual networks are often “air gapped” to prevent the inadvertent release of malware. This implementation however requires users to be in the classroom. A novel extension on this concept i...

In this paper, we focus on a novel Internet architecture, based on the urbanization of virtual machines. In this approach, virtual networks are built linking specific virtual elements (router, switch, firewall, box, access point, etc.). A virtual network represents a network with an independent protocol stack that shares resources from the underlying network infrastructure. Virtualization divid...

The DECOS integrated architecture supports the sharing of a single time-triggered network for multiple application subsystems. As its communication infrastructure each application subsystem possesses a virtual network with guaranteed temporal properties, which is realized on top of the physical time-triggered network. This paper presents a solution for the model-based design of virtual networks...

In this document we present an initial design that accommodates ‘virtual mobility’ into testbeds for wireless sensor networks. The virtual mobility of physical, simulated or emulated nodes is treated in a uniform manner by embedding the nodes in a virtual space. The virtual space is formed by a simulation model and handles all the traffic from the nodes. The traffic of physical nodes is therefo...

Virtual Path (VP) concept is gaining recently attention in terms of eeective deployment of ATM networks. In this paper, we present models and algorithms for network design and management of ATM networks based on virtual path concept from a network planning perspective. Our approach is based on statistical multiplexing of traac within a traac class by using a virtual path for the class and deter...

We present a new approach for routing in multi-tier heterogeneous wireless mobile ad hoc networks. This protocol, namely multi-virtual backbone protocol (MVP), naturally addresses key challenges arising from multi-tier wireless networks such as the coverage asymmetry and node heterogeneity. It also supports various QoS needs by constructing and maintaining QoS-specific virtual backbone infrastr...

Nowadays, the growth of virtual environments such as virtual organizations, social networks, and ubiquitous computing, has led to the adoption of trust concept. One of the methods of making trust in such environments is to use a long-term relationship with a trusted partner. The main problem of this kind of trust, which is based on personal experiences, is its limited domain. Moreover, both par...

The Virtual Network Mapping Problem arises in the context of Future Internet research. Multiple virtual networks with different characteristics are defined to suit specific applications. These virtual networks, with all of the resources they require, need to be realized in one physical network in a most cost effective way. Two properties make this problem challenging: Already finding any valid ...

An efficient methodology is proposed to find optimal shape of arch dams on the basis of constrained natural frequencies. The optimization is carried out by virtual sub population (VSP) evolutionary algorithm employing real values of design variables. In order to reduce the computational cost of the optimization process, the arch dam natural frequencies are predicted by properly trained back pro...