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Wireless ad hoc networks can be used to provide services anywhere and anytime. Ad hoc networks enable users to spontaneously form a dynamic communication system. They allow users to access the services offered by the fixed network through multi-hop communications, without requiring infrastructure in the user immediacy. Wireless networks are beset by insufficiency of communication bandwidth and therefore a key issue is to satisfy user requests with minimum service delay. Network nodes have limited energy resources; the energy expended for transferring information across the network has to be minimized. Adhoc wireless networks are constrained by limited battery power, which makes energy management an important issue.
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