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Topology Control
Topology control is a technique used in distributed computing to alter the underlying network (modeled as a graph) to reduce the cost of distributed algorithms if run over the resulting graphs. It is a basic technique in distributed algorithms. For instance, a (minimum) spanning tree is used as a backbone to reduce the cost of broadcast from O(m) to O(n), where m and n are the number of edges and vertices in the graph, respectively. The term "topology control" is used mostly by the wireless ad hoc and sensor networks research community. The main aim of topology control in this domain is to save energy, reduce interference between nodes and extend lifetime of the network. However, recently the term has also been gaining traction with regards to control of the network structure of electric power systems. Topology construction and maintenance Lately, topology control algorithms have been divided into two subproblems: topology construction, in charge of the initial reduction, and to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electric Power Systems
Mains electricity by country includes a list of countries and territories, with the plugs, voltages and frequencies they commonly use for providing electrical power to low voltage appliances, equipment, and lighting typically found in homes and offices. (For industrial machinery, see industrial and multiphase power plugs and sockets.) Some countries have more than one voltage available. For example, in North America, a unique split-phase system is used to supply to most premises that works by center tapping a 240 volt transformer. This system is able to concurrently provide 240 volts and 120 volts. Consequently, this allows homeowners to wire up both 240 V and 120 V circuits as they wish (as regulated by local building codes). Most sockets are connected to 120 V for the use of small appliances and electronic devices, while larger appliances such as dryers, electric ovens, ranges and EV chargers use dedicated 240 V sockets. Different sockets a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wireless Sensor Network
Wireless sensor networks (WSNs) refer to networks of spatially dispersed and dedicated sensors that monitor and record the physical conditions of the environment and forward the collected data to a central location. WSNs can measure environmental conditions such as temperature, sound, pollution levels, humidity and wind. These are similar to wireless ad hoc networks in the sense that they rely on wireless connectivity and spontaneous formation of networks so that sensor data can be transported wirelessly. WSNs monitor physical conditions, such as temperature, sound, and pressure. Modern networks are bi-directional, both collecting data and enabling control of sensor activity. The development of these networks was motivated by military applications such as battlefield surveillance. Such networks are used in industrial and consumer applications, such as industrial process monitoring and control and machine health monitoring and agriculture. A WSN is built of "nodes" – from a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Federated Wireless
Federated Wireless is an American-based wireless communications company headquartered in Arlington County, Virginia. The company is "commercializing CBRS spectrum for 4G and 5G wireless systems". Federated was founded in 2012 by Jeffrey H. Reed, Charles Clancy, Robert McGwier and Joseph Mitola, who subsequently co-applied for a number of patents relating to the operation of shared spectrum for wireless networks. The company was created to develop technology to enable the operation of Citizens Broadband Radio Service (CBRS), and is "backed by communications industry stalwarts" such as Charter Communications, American Tower Corporation and Arris. Iyad Tarazi, who had left an executive position at Sprint Corporation in a March 2014 restructuring, joined the company as CEO in September 2014. Federated Wireless, a subsidiary of Allied Minds, provides innovative cloud-based wireless infrastructure services to extend the access of carrier networks. In late 2013, Federated Wireless wa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
