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arXiv · 1305.4993

Life-Add: Lifetime Adjustable Design for WiFi Networks with Heterogeneous Energy Supplies

Shengbo Chen·Tarun Bansal·Yin Sun·Prasun Sinha·Ness B. Shroff
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Abstract

WiFi usage significantly reduces the battery lifetime of handheld devices such as smartphones and tablets, due to its high energy consumption. In this paper, we propose "Life-Add": a Lifetime Adjustable design for WiFi networks, where the devices are powered by battery, electric power, and/or renewable energy. In Life-Add, a device turns off its radio to save energy when the channel is sensed to be busy, and sleeps for a random time period before sensing the channel again. Life-Add carefully controls the devices' average sleep periods to improve their throughput while satisfying their operation time requirement. It is proven that Life-Add achieves near-optimal proportional-fair utility performance for single access point (AP) scenarios. Moreover, Life-Add alleviates the near-far effect and hidden terminal problem in general multiple AP scenarios. Our ns-3 simulations show that Life-Add simultaneously improves the lifetime, throughput, and fairness performance of WiFi networks, and coexists harmoniously with IEEE 802.11.

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Shengbo Chen, Tarun Bansal, Yin Sun, Prasun Sinha, Ness B. Shroff. 2013-05-22. Life-Add: Lifetime Adjustable Design for WiFi Networks with Heterogeneous Energy Supplies. https://arxiv.org/abs/1305.4993

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