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Assigning the resources of a virtual network to the components of a physical network, called Virtual Network Mapping, plays a central role in network virtualization. Existing approaches use classical heuristics like simulated annealing or attempt a two stage solution by solving the node mapping in a first stage and doing the link mapping in a second stage.(More)
1 Introduction In today's wired and wireless networks, the trends in networking technology very much point to a dominance of Internet technology with all its flavours. IP is the common " lingua franca " to enable the exchange of data across various networks. There is, however, an increasing divergence in the network control layer: different control(More)
Two algorithms for dynamically adjusting transmission power level on a per-node basis have been evaluated using a simulative approach. Network lifetime, convergence speed as well as resulting network connectivity have been obtained for these two algorithms using a particular indoor sensor environment. The network lifetime metrics of these two local(More)
Information-centric network architectures are an increasingly important approach for future Internet architectures. Several approaches are based on a non-hierarchical identifier (ID) namespace that requires some kind of global Name Resolution Service (NRS) to translate the object IDs into network addresses. Building a world-wide NRS for such a namespace(More)
0140-3664/$ see front matter 2013 Elsevier B.V. All rights reserved. http://dx.doi.org/10.1016/j.comcom.2013.01.009 q The research leading to these results has been conducted in the SAIL project and received funding from the European Community’s Seventh Framework Program (FP7/2007-2013) under Grant Agreement No. 257448. ⇑ Corresponding author. Tel.: +49(More)
Communication networks are an important application area for OMNeT++. While fixed topology networks are relatively easy to implement with the available means, an easy to use and effective extension for mobile networks is still missing. We present a framework for OMNeT++ to support simulations of mobile networks. The framework is intended to be deployable(More)
Network appliances perform different functions on network flows and constitute an important part of an operator's network. Normally, a set of chained network functions process network flows. Following the trend of virtualization of networks, virtualization of the network functions has also become a topic of interest. We define a model for formalizing the(More)
Directed diffusion is a prominent example of data-centric routing based on application layer data and purely local interactions. In its functioning it relies heavily on network-wide flooding which is an expensive operation, specifically with respect to the scarce energy resources of nodes in wireless sensor networks (WSNs). One well-researched way to curb(More)