23-11-2012, 01:14 PM
Wake on Wireless – a Case for Multi Radio Wireless LAN
Wake on Wireless.ppt (Size: 3.83 MB / Downloads: 57)
Motivation:
Wanted a single handheld computing device that is capable of both voice and data processing and communications
UCoM is different because its a
A high-quality secure interactive data & voice communicator that works over an all-IP infrastructure.
A platform for building software and hardware enhancements for wirelessly connected IP-based handheld devices, and supporting infra-structure Internet devices.
A platform for carrying out low-power wireless systems research.
A platform for exploring new functionality for small devices with sensors and low-power communications.
Previous Work in Optimizing Energy Consumption
Battery capacity doubles in energy density every 35 years [Pow95]
Many things can be improved:
Build energy efficient CMOS and VLSI circuits [Cha95]
Lower CPU frequencies [Gon96];
Move devices into different power modes [Sim00] [Sri96] [Pou01]
Enhance and modify network protocols [Kra98] [Woe98]
Vary signal level depending on proximity [Bam96]
Shut off wireless NIC [Stem97]
Scale voltage dynamically [Lor96] [Min00] [Per98]
Bottom line: Many techniques exists, each has limited effectiveness and many suffer from high latency issues.