On time-out driven power management policies in wireless networks

Rong Zheng, Jennifer C. Hou, Lui Sha

Research output: Contribution to conferencePaperpeer-review


Switching the devices to low-power states in prolonged period of inactivity is a widely used technique to conserve energy for battery-powered wireless devices. In this paper, we present a mathematical abstraction of time-out driven power management policies together with different wakeup mechanism in wireless networks to characterize the energy-performance trade-offs. The time-out driven power management is modeled as a M/G/1/K queue with multiple vacations and an attention span. We then derive the steady state behaviors of such systems, and present a closed-form solution for systems with large buffers. The analysis reveals that the "best" power management policy to minimize energy-delay product exhibits a threshold structure, i.e., when the traffic load is below certain threshold, a node should switch to the low-power state whenever possible and always remain active otherwise, and suggests a threshold-based power management protocol.

Original languageEnglish (US)
Number of pages7
StatePublished - 2004
EventGLOBECOM'04 - IEEE Global Telecommunications Conference - Dallas, TX, United States
Duration: Nov 29 2004Dec 3 2004


OtherGLOBECOM'04 - IEEE Global Telecommunications Conference
Country/TerritoryUnited States
CityDallas, TX

ASJC Scopus subject areas

  • General Engineering


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