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Adaptive battery conservation management using packet QoS classifications for multimedia mobile packet communications

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3 Author(s)
M. Motegi ; Wireless Labs., NTT DoCoMo Inc, Kanagawa, Japan ; H. Kayama ; N. Umeda

This paper proposes an adaptive battery conservation management (ABCM) method that controls the battery consumption without deteriorating the quality of service (QoS) in connection-less packet radio systems. The ABCM method has three states: active mode, idle mode, and battery saving mode (BSM). The BSM is a battery conservation state in which each mobile terminal (MT) awakens periodically to conserve its battery and to receive packet arrival notifications sent by a base station. In this method, a sleep-timer is predetermined and if no packet is transmitted or received within the duration of the sleep-timer, an NIT transits to the BSM. In addition, the sleep-timer and a paging interval are set according to the QoS classes of each packet. For the packets in the real-time class, a longer period is selected for the sleep-timer to refrain from entering the BSM. While in the non-real-time class, a shorter period is chosen for effective battery conservation. This paper evaluates the battery conservation effect by theoretical analysis and computer simulation. Numerical evaluations show that the ABCM method is suitable for connection-less packet radio systems. In the real-time class, the wake up delay is controlled by employing the ABCM even if it is done by connection-less packets. Meanwhile in the non-real-time class, an NIT exhibits more effective battery conservation than does the conventional method.

Published in:

Vehicular Technology Conference, 2002. Proceedings. VTC 2002-Fall. 2002 IEEE 56th  (Volume:2 )

Date of Conference:

2002