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

Autor:	Chen, Shengbo, Bansal, Tarun, Sun, Yin, Sinha, Prasun, Shroff, Ness B.
Rok vydání:	2013
Předmět:	Computer Science - Information Theory Computer Science - Networking and Internet Architecture Computer Science - Systems and Control
Druh dokumentu:	Working Paper
Popis:	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. Comment: This is the technical report of our WiOpt paper. The paper received the best student paper award at IEEE WiOpt 2013. The first three authors are co-primary authors
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1305.4993 Zobrazit plný text záznamu View this record from Arxiv