Paper Info
Title
NAPman: network-assisted power management for wifi devices
Abstract
WiFi radios in smart-phones consume a significant amount of power when active. The 802.11 standard allows these devices to save power through an energy-conserving Power Save Mode (PSM). However, depending on the PSM implementation strategies used by the clients/Access Points (APs), we find competing background traffic results in one or more of the following negative consequences: a significant increase, up to 300%, in a client's energy consumption, a decrease in wireless network capacity due to unnecessary retransmissions, and unfairness. In this paper, we propose NAPman: Network-Assisted Power Management for WiFi devices that addresses the above issues. NAPman leverages AP virtualization and a new energy-aware fair scheduling algorithm to minimize client energy consumption and unnecessary retransmissions, while ensuring fairness among competing traffic. NAPman is incrementally deployable via software updates to the AP and does not require any changes to the 802.11 protocol or the mobile clients. Our prototype implementation improves the energy savings on a smart-phone by up to 70% under varied settings of background traffic, while ensuring fairness.
Year
DOI
Venue
2010
10.1145/1814433.1814445
MobiSys
Keywords
Field
DocType
network-assisted power management,unnecessary retransmissions,wifi device,napman leverages ap virtualization,background traffic result,energy saving,energy consumption,psm implementation strategy,client energy consumption,background traffic,scheduling,wireless network,energy conservation,wireless local area network
Virtualization,Wireless network,Power management,Scheduling (computing),Computer science,Fair scheduling,Computer network,Real-time computing,Software,Energy consumption,Embedded system
Conference
Citations 
PageRank 
References 
79
2.66
23
Authors
4
Name
Order
Citations
PageRank
Eric Rozner164228.07
Vishnu Navda286547.76
R. Ramjee33180299.73
Shravan Rayanchu477438.08