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Coexistence-Aware Scheduling For Wireless System-on-a-Chip Devices

Summary: Coexistence-Aware Scheduling For Wireless
System-on-a-Chip Devices
Lei Yang, Vinod Kone, Xue Yang, York Liu, Ben Y. Zhao and Haitao Zheng
Department of Computer Science, University of California, Santa Barbara, CA 93106
Intel Labs, Hillsboro, OR 97124
Abstract--Today's mobile devices support many wireless tech-
nologies to achieve ubiquitous connectivity. Economic and energy
constraints, however, drive the industry to implement multiple
technologies into a single radio. This system-on-a-chip archi-
tecture leads to competition among networks when devices
toggle across different technologies to communicate with multiple
networks. In this paper, we study the impact of such network
competition using a representative scenario where devices split
their time between WiMAX and WiFi connections. We show that
competition with WiMAX significantly lowers WiFi's throughput,
but this performance degradation is largely unnecessary, and can
be attributed to the fact that WiMAX's transmission scheduling
does not consider competing networks. We propose PACT, a new
competition-friendly WiMAX scheduling policy that cooperates
with WiFi links hosted by its users without compromising its


Source: Almeroth, Kevin C. - Department of Computer Science, University of California at Santa Barbara


Collections: Computer Technologies and Information Sciences