Joint Optimization of Energy Efficiency and Interference for Green WLANs
In the past years, the issues of energy efficiency and interference are becoming increasingly serious in wireless local area network (WLAN) since lots of access points (AP) are deployed densely to provide high-speed users access. However, current works focus on solving the two issues separately and the influence of each other is rarely considered. To address these problems, we propose a joint optimization scheme of energy efficiency and interference to reduce energy consumption and interference together without sacrificing users’ traffic demands. Firstly, based on energy consumption measurement of AP and network interference analysis, we establish energy efficiency and interference models respectively. Then, the weighting method is introduced to build the joint optimization to quantify the effects of user-AP association, AP switch, AP transmit power and AP channel on energy consumption and interference. Lastly, we formulate the joint optimization as an Mixed Integer Non-Linear Programming (MINLP) problem. Since the MINLP problem is NP-hard, we proposed an Joint Optimization of Energy Efficiency and Interference (JOEI) algorithm based on greedy method to simplify its computational complexity. The evaluation results show that the proposed algorithm can effectively reduce the network energy consumption while improve the capacity of WLANs.
KeywordsEnergy efficiency Interference Joint optimization Green WLAN
- 2.Jardosh, A.P., Iannaccone, G., Papagiannaki, K., Vinnakota, B.: Towards an energy-star WLAN infrastructure. In: Eighth IEEE Workshop on Mobile Computing Systems and Applications. HotMobile 2007, pp. 85–90 (2007)Google Scholar
- 3.Su, Y., Wang, Y., Zhang, Y., Liu, Y., Yuan, J.: Partially Overlapped Channel interference measurement implementation and analysis. In: Computer Communications Workshops, pp. 760–765 (2016)Google Scholar
- 7.Lee, K., Kim, Y., Kim, S., Shin, J., Shin, S., Chong, S.: Just-in-time WLANs: On-demand interference-managed WLAN infrastructures. In: IEEE INFOCOM 2016 - the IEEE International Conference on Computer Communications, pp. 1–9 (2016)Google Scholar
- 8.Zeng, Y., Pathak, P.H., Mohapatra, P.: Just-in-time WLANs: A first look at 802.11ac in action: Energy efficiency and interference characterization. In: NETWORKING Conference, pp. 1–9 (2014)Google Scholar
- 12.Zhou, K., Jia, X., Xie, L., Chang, Y.: Channel assignment for WLAN by considering overlapping channels in SINR interference model. In: International Conference on Computing, NETWORKING and Communications, pp. 1005–1009 (2012)Google Scholar