Date(s) - 26 Feb 2014
1:10 PM - 2:00 PM
3043 ECpE Building Addition
Title: A Practical PSM Scheme for Varying Server Delay
Speaker: Brian Peck, ECpE Graduate Student
Adviser: Daji Qiao, Associate Professor
Abstract: Today, many individuals use smartphones or other battery-powered mobile devices equipped with Wi-Fi to access the Internet. Since the Network Interface Cards (NICs) often use a substantial portion of available energy, schemes such as the 802.11 Power Saving Mode (PSM) have been used to limit the amount of time the NIC is awake in an operable state in order to extend battery life. However, since the NIC cannot retrieve packets while sleeping, PSM may negatively impact packet delay. These delays are also unbounded and can increase communication time by a significant amount – especially in a mobile environment where server delays may change drastically. To mitigate this, we present PSM-AW: a Power Saving Mode with Adaptive Wake-up. PSM-AW is a client-side solution which allows the client device to sleep for a maximum time interval while still keeping a tight bound on performance. We present and prove a bound on performance using PSM-AW and demonstrate its effectiveness through extensive simulations and experiments.
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