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We introduce the notion of a virtual topology and explore the use of search-tree indexing to achieve highly scalable parallel search-tree algorithms for NP-hard problems. Vertex Cover and Cluster Editing are used as case studies.
Now a days Internet Technology leads to the expansion of new class of network called as Wireless Mesh Networks (WMNs). Which contains mesh topology arrange across different district performing various tasks such as data aggregation, communication etc. Energy is very big issue in Wireless Network. So, in this paper we used the Two Hop Clustering based approach which optimizes the energy in Wireless...
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...
Cell breathing is a mechanism used in cellular networks since many years, which is now proposed for energy efficient purposes. By using this technique, it is possible to save energy during low traffic periods by switching unnecessary BSs off whereas the cell topology is re-adapted supported on some few BSs active. In this article, we analyze a multi-size approach which provide means for an enhanced...
Big-data is a popular term in the field of information and communication technology. Wireless Sensor Networks (WSN) is one of the eminent contributors of big data. WSN contains numerous sensor nodes that cooperatively monitor an environment. Each network consists of sensor node, memory, and communication device. Data generated by single sensor node is small but data generated by distributed sensor...
The Internet of Things will comprise billions of randomly placed devices, forming a dense and unstructured network environment with overlapping wireless topologies. In such demanding environment, the grouping of IoT devices into clusters is a promising approach for the management and the control of network resources in the context of an autonomous system. This paper proposes the SYSTAS algorithm for...
Space information network, which is envisioned as a new type of self-organizing networks constituted by information systems of land, sea, air, and space, has attracted tremendous interest recently. In this paper, to improve the data delivery performance and the network scalability of space information networks, a new hierarchic topology management scheme based on decision model and smart agents is...
Massive data centers form the core infrastructure support for the ever increasing cloud based services. Hence, the performance of data centers will have important influence on the scalability of these services. In particular, the data center network must be agile, available and scalable in order to respond to ever changing service requirements and application demands. Thus, the research community...
Due to their intrinsic characteristics, Wireless Sensor Networks (WSN) are prone to failure, mainly because of their energy limitations. Considering this, the use of self-healing mechanisms becomes necessary in order to create a more fault-tolerant and robust WSN. With this problem at hand, we have proposed and developed DACA, a Disjoint path And Clustering Algorithm that increases the network lifetime...
Topology managers expose network information to applications to improve application-level resource management. An example for various ongoing standardization activities is Application-Layer Traffic Optimization (ALTO). Due to privacy and security constraints, exposed network information has to be filtered according to policies. As part of such policies, distance information can be abstracted by presenting...
Visualization plays an important role in the analysis of grid circuit topological structure. The traditional line visualization method based on geographical position usually contains such problems that the nodes density distribution is uneven and the lines are too complex to understand. Some other methods completely neglect the real geographic location information. In this paper, we propose a new...
Using Cluster-based routing algorithm to prolong wireless sensor network's lifetime is an important research topics. In this paper we proposed a novel clustering algorithm named PLEACH, which selects cluster head more evenly. First, it calculates the optimal cluster numbers according to a new strategy. Then it uses improved PSO algorithm to choose the most suitable cluster head in the next round selecting...
We consider the collaborative control of a group of autonomous mobile agents. Building upon our earlier work we consider the communication needs and connectivity of the agents' network as they move. We develop algorithms that automatically sense the possibility of connectivity loss among the agents. We also consider the automatic detection of path disconnection when more than one path need to be maintained...
A wireless sensor network (WSN) is a distributed network that facilitates wireless information gathering within a region of interest. The information collected by sensors is aggregated at a central node know as the sink node. Two challenges in the deployment of WSNs are limited battery power of each sensor node and sink node anonymity. The role played by the sink node raises its profile as a high...
The OpenFlow has been widely used as a standard protocol to actualize Software Defined Networking. With the object of reliability and scalability in a control plane of a more realistic network, management methods utilizing multi-controllers has been getting more developed these days. However, implementing the management methods on multi-controllers might cause inter-controller communication delays...
For single sink multi-hop wireless sensor networks, the nodes close to the sink node forward the total network traffic to the sink. Hence, they exhaust their energy faster and energy-holes are formed near the sink node that reduces the lifetime of the network. To enhance the network lifetime and to reduce the packet delay, multiple sink node deployment strategies are proposed for better load balancing,...
In this paper, we tackle the problem of graph generalization in the context of privacy-preserving social network mining. By grouping together nodes that are not only similar but that also belong to the same k-shells, we better preserve the community structure of the graph, its utility in case of clustering-related applications, while still achieving some privacy level through the concept of graph...
Multiplex networks, a special type of multilayer networks, are increasingly applied in many domains ranging from social media analytics to biology. A common task in these applications concerns the detection of community structures. Many existing algorithms for community detection in multiplexes attempt to detect communities which are shared by all layers. In this article we propose a community detection...
In this paper, an algorithm to automatically cluster the Self-Organizing Map (SOM) is presented. The proposed approach consists of creating a graph based on the SOM grid, whose connection strengths are measured in terms of pattern density. The connection of this graph are filtered in order to remove the mutually weakest connections between two adjacent neurons. The remaining graph is then pruned after...
In SDN, forwarding devices can only operate correctly while connected to a logically centralized controller. To avoid single-point-of-failure, controller architectures are usually implemented as distributed systems. In this context, recent literature identified fundamental issues, such as device isolation and controller overload, and proposed controller placement strategies to tackle them. However,...
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