Performance of an efficient sleep mode operation for IEEE 802.16m

Sangkyu Baek; Bong Dae Choi

doi:10.3934/jimo.2011.7.623

Article Contents

2011, Volume 7, Issue 3: 623-639. Doi: 10.3934/jimo.2011.7.623

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Performance of an efficient sleep mode operation for IEEE 802.16m

Sangkyu Baek^1, and
Bong Dae Choi^1,

1.
Department of Mathematics and Telecommunication Mathematics Research Center, Korea University, Seoul 136-701

Received: September 2010

Revised: May 2011

Published: July 2011

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Abstract

Power saving is one of the important issues for battery-powered mobile station in mobile WiMAX. Both IEEE 802.16e and IEEE 802.16m standards define sleep mode operations for power saving of mobile stations. In this paper, we propose an efficient sleep mode operation for the IEEE 802.16m advanced mobile WiMAX. The proposed scheme takes advantages of sleep modes in both the IEEE 802.16e and IEEE 802.16m. This scheme has binary exponential sleep windows which guarantee the minimum length for effective power saving. The mobile station uses the T_AMS timer in the IEEE 802.16m so that the mobile station sends or receives data packets during the extendable listening window in the sleep mode. We mathematically analyze the proposed scheme by an embedded Markov chain to obtain the average message delay and the average power consumption of a mobile station. The analytical results match with the simulation results very well. The analytical results show that the power consumption of our scheme is better than those of the legacy sleep modes in the IEEE 802.16e and the IEEE 802.16m under the same delay bound.

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Mathematics Subject Classification: Primary: 68M20; Secondary: 90B18, 90B22.

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