Buffering approach for energy saving in video sensors

Wanghong Yuan, Klara Nahrstedt

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Networked video sensors need to execute two dependent periodic tasks: video encoding and transmission. The dependency and periodicity often result in small idle intervals of CPU and wireless network interface card (WNIC). In this paper, we present a sender-buffering approach to exploit such idle intervals for energy saving. Specifically, a video sensor encodes frames in a timely fashion, but buffers encoded frames and transmits them in bursts at longer intervals. In doing so, it (1) accumulates short WNIC idle intervals into longer ones, during which the WNIC can enter the lower-power sleep mode, and (2) slows down the CPU by avoiding CPU idle intervals, which are resulted from both early completion of frame encoding and waiting for frame transmission. Our experimental results show that the buffering approach can save 32-80% CPU energy and 35- 54% WNIC energy, while increasing the overall end-to-end transmission delay by at most 2 frames.

Original languageEnglish (US)
Title of host publicationProceedings - 2003 International Conference on Multimedia and Expo, ICME
PublisherIEEE Computer Society
PagesI289-I292
ISBN (Electronic)0780379659
DOIs
StatePublished - Jan 1 2003
Event2003 International Conference on Multimedia and Expo, ICME 2003 - Baltimore, United States
Duration: Jul 6 2003Jul 9 2003

Publication series

NameProceedings - IEEE International Conference on Multimedia and Expo
Volume1
ISSN (Print)1945-7871
ISSN (Electronic)1945-788X

Other

Other2003 International Conference on Multimedia and Expo, ICME 2003
CountryUnited States
CityBaltimore
Period7/6/037/9/03

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Computer Science Applications

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