High Quality Content by WIKIPEDIA articles! Topology control is a technique used mainly in wireless ad hoc and sensor networks in order to reduce the initial topology of the network to save energy and extend the lifetime of the network. The main goal is to reduce the number of active nodes and active links, preserving the saved resources for future maintenance. Lately, topology control have been divided into two subproblems: topology construction, in charge of the initial reduction, and topology maintenance, in charge of the maintenance of the reduced topology so characteristics like connectivity and coverage are preserved. This is the first stage of a topology control protocol. Once the initial topology is deployed, specially when the location of the nodes is random, the administrator has no control over the design of the network; for example, some areas may be very dense, showing a high number of redundant nodes, which will increase the number of message collisions and will provide several copies of the same information from similarly located nodes.

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