naa a22 4500 510796311 CHVBK 20180411083338.0 cr unu---uuuuu 180411e20130201xx s 000 0 eng 10.1007/s11277-012-0551-4 doi (NATIONALLICENCE)springer-10.1007/s11277-012-0551-4 Design of Predictive and Dynamic Energy-Efficient Mechanisms for IEEE 802.16e [Elektronische Daten] [Huei-Wen Ferng, Hong-Yu Li] Three predictive and dynamic sleep time planning (PDSTP) energy-efficient mechanisms are proposed in this paper to simultaneously improve energy efficiency and packet delay for IEEE 802.16e. To estimate the time instant when a mobile station (MS) should wake up for receiving downlink packets, a prediction method is designed. With the predicted time instant, an MS is then allowed to sleep as much as possible using multiple maximum sleep intervals followed by a smaller sleep interval before the predicted time instant. After the predicted time instant, a few smaller sleep intervals with a trend of constant level (CL), exponential decrease (ED), or linear decrease (LD) can be further arranged. To react to the outlier of prediction, exponential increase for sleep intervals can be extended. The combination of the aforementioned designs then forms our three proposed mechanisms, namely, PDSTP-CL, PDSTP-ED, and PDSTP-LD. Via simulations, we show that PDSTP-CL not only performs better than PDSTP-ED and PDSTP-LD under general situations but also outperforms the standard sleep mode operation of the type-I power saving class (PSC-I) in IEEE 802.16e and the exponential sleep time backoff mechanism (ESTBM) in the literature in terms of energy efficiency and packet delay. Springer Science+Business Media, LLC., 2012 Energy-efficient mechanism nationallicence Sleep mode nationallicence IEEE 802.16e nationallicence Power saving nationallicence Ferng Huei-Wen Department of Computer Science and Information Engineering, National Taiwan University of Science and Technology, 106, Taipei, Taiwan aut Li Hong-Yu Department of Computer Science and Information Engineering, National Taiwan University of Science and Technology, 106, Taipei, Taiwan aut Wireless Personal Communications Springer US; http://www.springer-ny.com 68/4(2013-02-01), 1807-1835 0929-6212 68:4<1807 2013 68 11277 https://doi.org/10.1007/s11277-012-0551-4 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11277-012-0551-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ferng Huei-Wen Department of Computer Science and Information Engineering, National Taiwan University of Science and Technology, 106, Taipei, Taiwan aut NATIONALLICENCE 700 1- Li Hong-Yu Department of Computer Science and Information Engineering, National Taiwan University of Science and Technology, 106, Taipei, Taiwan aut NATIONALLICENCE 773 0- Wireless Personal Communications Springer US; http://www.springer-ny.com 68/4(2013-02-01), 1807-1835 0929-6212 68:4<1807 2013 68 11277 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer