A Dynamic Sleep Interval Decision Scheme for Power-Saving with Minimum Delay in IEEE 802.16e Mobile WiMAX

Bong Keol SHIN  Ju Wook JANG  

Publication
IEICE TRANSACTIONS on Communications   Vol.E95-B   No.11   pp.3609-3612
Publication Date: 2012/11/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E95.B.3609
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
Keyword: 
sleep interval decision,  energy saving mechanism,  WiMAX,  

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Summary: 
We observe that the state-of-the-art power-saving mechanisms (PSM) for IEEE 802.16e is neither optimal in terms of delay nor in terms of energy consumption. We propose a new PSM which achieves the optimality in terms of the average buffering delay without increasing energy consumption. In order to do so, we derive a formula which relates the average buffering delay to sleep intervals. Simulation results show that our scheme surpasses the BTE algorithm (used by the current IEEE 802.16e Mobile Stations) by 56.75–76% and the PSID algorithm by 8.52–24.39% in terms of the delay-energy consumption product.