Mobile - Wireless Communications White Papers
Idle Time Power Management for Personal Wireless Devices
Overview Energy Consumption is becoming a critical concern that directly affects the mobility and lifetime of mobile and embedded systems. Different embedded and mobile applications place different demands on the wireless communication system and thus the energy consumption of the wireless cards. In the past, work has been done to study energy consumed in wireless cards. Evaluation of some techniques by implementing them on HP systems was carried out and the actual energy consumed by the wireless card was measured. Two schemes were tested. The first increased the card's sleeping duration allowing power to be reduced by putting the card in low power states for longer times. The second technique was more aggressive, the power manager completely shut-down the card during idle periods. When applying these two techniques for an email application, 25% energy savings were achieved for extended the sleep time up to 60 sec, while the savings reached 89% when the card was shut - down for the same duration.
| Publisher | HP Labs | File Format | PDF, requires Acrobat Rdr 5 |
|---|---|---|---|
| Date Published | September 2003 | Downloads | 148 |
| Format | White Papers | ||
| Topics | |||
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