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ceClub: Flashback: A New Control Channel for Wireless Networks
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Asaf Cidon (EE, Stanford University)
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Wednesday, 21.12.2011, 11:30
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EE Meyer Building 861
Unlike wired network protocols, Wi-Fi does not separate the data channel from the control channel, since only a single sender and receiver can communicate at a given time slot. Flashback is a system that allows multiple transmitters to send 'flashes' of high power OFDM sub-carriers without affecting the normal data transmissions on the Wi-Fi channel. By taking advantage of SNR margins of Wi-Fi channel codes, the flashes do not impose any overhead on the regular data transmission. Using this simple PHY mechanism, Flashback provides higher networking layers with a multi-user control channel, which can be used to significantly improve existing Wi-Fi protocols. During the talk we will share the results from our implementation of Flashback, and discuss their implications on the higher layers of the Wi-Fi stack.

bio: Asaf Cidon is an Electrical Engineering PhD and MBA student at Stanford University, where he conducts research on data-center and mobile systems under Professors Mendel Rosenblum and Sachin Katti. He worked at Google Israel and helped develop Google Related and previously served as a Product Manager for two start-ups. Prior to his studies, Asaf served as a team leader in an elite unit in the Israeli Intelligence Forces. He received his BSc in Computer and Software Engineering Cum Laude from the Technion, and is a recipient of the Stanford Graduate Fellowship and Sohnis Promising Scientist Award.
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