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Simulation is the most widely used tool for evaluating network protocols in multihop wireless networks, yet this has so far been limited due to a lack of models for creating a wide range of scenarios of mobile nodes moving about. For example, for evaluating multihop routing protocols, the frequently used Random Waypoint model can only effectively be used in scenarios with relatively high node density,...
Latency-minimization is recognized as one of the pillars of 5G network architecture design. Information-Centric Networking (ICN) appears a promising candidate technology for building an agile communication model that reduces latency through in-network caching. However, no proposal has developed so far latency-aware cache management mechanisms for ICN. In the paper, we investigate the role of latency...
An Unmanned Aerial Ad hoc Network (UAANET) is a special type of Mobile Ad hoc Network (MANET). For these networks, researchers rely mostly on simulations to evaluate their proposed networking protocols. One major component of such simulation studies is the movement pattern of the UAVs. In this paper, we first show that mobility models affect the performance of UAANET/MANET routing protocols. To study...
As (M2M) Machine-To-Machine, communication continues to grow rapidly, a full study on overload control approach to manage the data and signaling of H2H traffic from massive MTC devices is required. In this paper, a new M2M resource-scheduling algorithm for Long Term Evolution (LTE) is proposed. It provides Quality of Service (QoS) guarantee to Guaranteed Bit Rate (GBR) services, we set priorities...
Wireless Sensor Networks (WSNs) have been widely considered as a promising solution to support different types of applications on industrial environments. Many of these applications impose strict dependability requirements, since a system failure may result in economic losses, or damage for human life or to the environment. The absence of an effective approach enabling the dependability evaluation...
Topological changes in IP networks may significantly influence the performance of networking algorithms, which therefore should be carefully evaluated using a large topology pool with diverse characteristics. In this paper, we present an automated topology generation and analysis tool to perform an elaborate topological dependency analysis of a Multi Topology Routing based IP Fast Re-Route technology,...
The Internet of Things (IoT) has a significant effect on the evolution of modern Information and Communication Technology. It reshapes the traditional network infrastructures with novel hardware and software technologies. In this work we analyse the IoT platforms from the communication architecture point of view and we evaluate the effects of the communication anomalies on different edges of the data...
Generating synthetic network graphs that capture key topological and electrical characteristics of real-world electric power systems is important in aiding widespread and accurate analysis of these systems. Classical statistical models of graphs, such as small-world networks or Erdős-Renyi graphs, are unable to generate synthetic graphs that accurately represent the topology of real electric power...
In this paper, the problem of power optimization and connectivity control for an underwater random sensor network is investigated. The weighted edge connectivity is proposed as a metric to evaluate the connectivity of the weighted expected graph of a random sensor network where the elements of the weight matrix represent the operational probability of their corresponding communication links. The introduced...
In this paper, we design and implement a scheme to build an optimal spanning tree over a hybrid network composed of SDN and legacy switches. SDN is an emerging network technology and gradually gaining adoption worldwide. However, during the technology transition period, which may last several years from now on, inevitably SDN switches and legacy switches will need to coexist in a network. In a legacy...
In today's large social and technological networks, since it is unfeasible to observe all the nodes, the source of diffusion is determined based on the observations of a subset of nodes. The probability of source localization error depends on the particular choice of observer nodes. We propose a criterion for observer node selection based on the minimal pairwise Chernoff distance between distributions...
Since traffic load in mobile networks typically changes significantly over time, time-varying routing, where routing changes in certain time intervals, seems an obvious solution. Yet multiple researchers have claimed independently in the past, that time-varying routing does not lead to worthwhile benefits given its overhead. In this paper, we study this issue in a systematic way. We argue that previous...
The SDN architecture decouples the control plane and data plane, and multiple controllers are adopted to solve the scalability and reliability problem in SDN. However, most of the researches are focused on the control architecture and ignore the controller placement problem. Moreover, the mapping between the switches and controllers are static in current proposals, which will lead to the load unbalance...
We define k-content connectivity as the reachability of at least one content from any point of a data center network under concurrent k-1 failures. A flexible content placement algorithm is proposed to achieve k-content connectivity.
Content-Centric Networking (CCN) is a promising architectural approach that focuses on the efficient distribution of uniquely named data objects. A piece of content is represented by a single object in the network and is divided into multiple chunks which can be uniquely named and cached by network nodes. However, in its current form, the potential of CCN is not fully exploited due to the lack of...
Software Defined Networking (SDN) is an emerging network control paradigm focused on logical centralization and programmability. At the same time, distributed routing protocols, most notably OSPF and IS-IS, are still prevalent in IP networks, as they provide shortest path routing, fast topological convergence after network failures, and, perhaps most importantly, the confidence based on decades of...
Topology Control (TC) is a fundamental research problem where the goal is to determine a set of wireless links such that the composed topology satisfies some desirable properties. Some of the achievable properties are connectivity, symmetricity, planarity, minimal use of energy, sparseness, bounded maximum node degree etc. A topology is said to be planar if there is no link crossing in the topology...
Social networks analysis is an emergent field of science which aims to study, model, and predict processes and relationships found in nature through the usage of graphs. To that end, since the discovery of fundamental properties like small-world effect and preferential attachment, the last decade has witnessed a boom of more fine-tuned, more complex social network models. Despite of a plethora of...
A fuzzy metric for the Collection Tree Protocol (CTP) algorithm in Wireless Sensor Networks (WSNs) is proposed. This metric incorporates node energy level and congestion along with the traditional link quality parameter used in CTP with an aim of making CTP energy and congestion aware. The performance of the fuzzy metric based CTP is evaluated and compared with the original CTP algorithm, in a TinyOS...
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