Radwa Ahmed Osman

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Energy efficiency is one of the most important performances of a wireless sensor network. In this paper, we show that choosing a proper transmission scheme given the channel and network conditions can ensure a high energy performance in different transmission environments. Based on the energy models we established for both cooperative and non-cooperative(More)
Due to the increasing demand on wireless technologies, many researches targeted the improvement of quality of service (QoS) of global wireless networks such as 802.11 and 802.16. Most researches targeted the physical layer (PHY) parameters and medium access control (MAC) mechanisms to improve QoS, but they didn't guarantee the QoS of each type of(More)
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