LBPS: Load-Based Power Saving in the IEEE 802.16e Network

Authors:
Chun-Chuan Yang;Yi-Ting Mai;Jeng-Yueng Chen;Yu-Shiuan Shen;Yu-Chen Kuo
Affiliations:
Dept. of Computer Science and Information Engineering, National Chi Nan University, Puli, Nantou County, Taiwan, ROC;Dept. of Information Networking Technology, Hsiuping University of Science and Technology, Taichung City, Taiwan, ROC;Dept. of Information Networking Technology, Hsiuping University of Science and Technology, Taichung City, Taiwan, ROC;Dept. of Computer Science and Information Engineering, National Chi Nan University, Puli, Nantou County, Taiwan, ROC;Dept. of Computer Science and Information Engineering, National Chi Nan University, Puli, Nantou County, Taiwan, ROC
Venue:
Computers and Electrical Engineering
Year:
2012

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Abstract

Previous works in IEEE 802.16e power saving mainly focused on standard Type I or Type II power saving class. The limitation of adopting Type I or Type II is discussed in the paper, and the idea of Load-Based Power Saving (LBPS) is proposed. The base station in LBPS measures the traffic load and estimates the sleep window size for mobile subscriber stations by setting a threshold for data accumulation. A basic version of LBPS, LBPS-Aggr, is presented in the paper, in which all of the traffic in the network is treated as a single aggregate flow in estimation of the sleep window size. Adopting the idea of group splitting or merging in sleep schedule, two enhanced versions namely LBPS-Split and LBPS-Merge are proposed. Simulation results demonstrate that better power saving efficiency can be achieved by proposed LBPS schemes than standard Type I and Type II.