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Wireless hosts are usually powered by batteries which provide a limited amount of energy. Therefore, techniques to reduce energy consumption are of interest. One way to conserve energy is to use power saving mechanisms. Power saving mechanisms allows a node to enter a doze state by powering off its wireless network interface when deemed reasonable. Another alternative is to use power control schemes which suitably vary transmit power to reduce energy consumption. In addition to providing energy saving, power control can potentially be used to improve spatial reuse of the wireless channel.
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