In modern backbone networks with heterogeneous traffic, providing connectivity is taken for granted. The MPLS technology is a de-facto standard in modern backbone networks because of the applications it enables, in particular L2/L3 VPNs and traffic engineering. This paper deals with traffic engineering in MPLS backbone networks. We propose a method of gathering network performance parameters an...

In this work we present a tool for the automated design of Wireless Mesh Networks (WMN). The general scenario we envision is that of constructing WMNs with WLAN networks as clients (tier 1) and a mesh network (tier 2) to provide interWLAN as well as gateway connectivity. Our main aim in this work is to a) design capacity-constrained WMNs, b) build resilient WMNs with transient demands. IEEE 802...

188 Abstract-The lifetime of battery operated wireless sensor networks can be prolonged by energy aware maintenance of the virtual backbone. The energy of a node is depleted quickly during communication and network failure is most likely to occur when the energy of a Minimum Connected Dominating Set (MCDS) node is exhausted. The reconstruction of an alternate backbone without the depleted node ...

Software-defined networking (SDN) promises to improve the programmability and flexibility of networks, but it may bring also new challenges that need to be explored. One open issue is the quantitative assessment of the properties of SDN backbone networks to determine whether they can provide similar availability to the traditional IP backbone networks. To achieve this goal, a two-level availabi...

In this paper, we overview our approaches and methods to the topological synthesis and management of Mobile Backbone Network (MBN) based architectures. Such backbone networks are intended to aid in the support of multimedia applications across mobile ad hoc wireless networks. An MBN based ad hoc network employs backbone nodes, operating in a manner similar to that used by base-stations in a cel...

Abstract Networks provide useful tools for analysing diverse complex systems from natural, social and technological domains. Growing size variety of data such as more nodes links associated weights, directions signs can accessory information. Link weight abundance, on the other hand, results in denser networks with noisy, insignificant or otherwise redundant data. Moreover, typical network anal...

Abstract Political network data can often be challenging to collect and clean for analysis. This article demonstrates how the incidentally backbone packages R used together construct networks among legislators in US Congress. These customized focus on a specific chamber (Senate or House of Representatives), session (2003 present), legislation type (bills resolutions), policy area (32 topics). F...

The long, medium and short term planning of Hungarian backbone and Budapest trunk networks in Hungarian Telecom are based on the software package PLANET, which covers a wide range of the transmission planning activities. The paper describes the PDH and SDH network planning tools, the planning processes and the resulted networks. Main present features of Hungarian backbone and Budapest trunk net...