Power management for energy-aware communication systems [Journal Paper]

NESL Technical Report #: 2003-8-3


Abstract: System-level power management has become a key technique to render modern wireless communication devices economically viable. Despite their relatively large impact on the system energy consumption, power management for radios has been limited to shutdown-based schemes, while processors have benefited from superior techniques based on dynamic voltage scaling (DVS). However, similar scaling approaches that trade-off energy versus performance are also available for radios. To utilize these in radio power management, existing packet scheduling policies have to be thoroughly rethought to make them energy-aware, essentially opening a whole new set of challenges the same way the introduction of DVS did to CPU task scheduling. We use one specific scaling technique, dynamic modulation scaling (DMS), as a vehicle to outline these challenges, and to introduce the intricacies caused by the nonpreemptive nature of packet scheduling and the time-varying wireless channel.

Publication Forum: ACM Transactions on Embedded Computing Systems

Volume: 2

Number: 3

Page (Start): 431

Page (End): 447

Page (Count): 17

Date: 2003-08-15

Publisher: ACM Press

Public Document?: Yes

NESL Document?: Yes

Document category: Journal Paper