01496nas a2200169   4500008004100000245008200041210006900123260002000192300001200212520085900224100002101083700002301104700001901127700002401146700002501170856013101195       2015                        eng d00aPower Management and Rate Control Mechanism for Wi-Fi Infrastructure Networks0 aPower Management and Rate Control Mechanism for WiFi Infrastruct  cOctober 26 - 28  a731-7363 a<p class="rtejustify">The advances in wireless networks have encouraged the use of mobile devices in everyday life. However, one of the main problems of these devices is the limited amount of energy they have available to use in order to function and the extended energy consumption of wireless adapters. A lot of research has been done to reduce the amount of energy spent on wireless communications. On the other hand, the extended use of wireless networks causes interference problems in communications, which affect the overall performance of each network. The purpose of this work is to provide a mechanism, which can reduce the power consumption on the station side and increase the mobile devices’ operation time, and in combination with a rate adaptation mechanism on the access point side, improve the overall performance of the network.</p>
1 aBouras, Christos1 aKapoulas, Vaggelis1 aStamos, Kostas1 aStathopoulos, Nikos1 aTavoularis, Nikolaos  uhttp://telematics.upatras.gr/telematics/publications/power-management-and-rate-control-mechanism-wi-fi-infrastructure-networks01711nas a2200181   4500008004100000245007800041210006900119300001000188490000900198520106100207100002101268700002301289700002701312700001901339700002401358700002501382856012201407       2015                        eng d00aA Signal Adaptation Mechanism for power optimization of wireless adapters0 aSignal Adaptation Mechanism for power optimization of wireless a  a48-720 v4(3)3 a<p class="rtejustify">This manuscript introduces, implements and evaluates a feedback-based adaptation mechanism that adjusts the transmission power of a wireless card on commodity mobile devices. Main focus of this work is to minimize the power consumption by adjusting the transmission power of the wireless card, thus extending the battery life, while negative effects on connection quality are avoided. To achieve that, a mechanism that optimizes the power depending on the quality of the connection is presented, which measures the quality of the transmission and adjusts the transmission power, by utilizing an expanded array of metrics, for more accurate estimation. The mechanism has been implemented and tested on actual wireless adapters. In order to evaluate, fine-tune and improve the mechanism, a list of real environment experiments has been performed. The results indicate that power consumption can be significantly reduced for nodes that are either almost stationary or slowly moving, without any significant increase in packet loss.</p>
1 aBouras, Christos1 aKapoulas, Vaggelis1 aKioumourtzis, Georgios1 aStamos, Kostas1 aStathopoulos, Nikos1 aTavoularis, Nikolaos  uhttp://telematics.upatras.gr/telematics/publications/signal-adaptation-mechanism-power-optimization-wireless-adapters