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To extend lifetime of battery-powered mobile device before its recharging in broadband wireless access networks, power saving mechanism in MAC (Medium Access Control) has become a significant design issue. Basically, a power saving mechanism is manipulated by adjusting operating parameters such as The minimum sleep interval (Tmin) and The maximum sleep interval (Tmax). In this paper, the authors propose a new energy saving mechanism for IEEE 802.16e/m to get maximized energy saving by dynamically changing sleep interval T based on traffic rate of serving service. The proposed mechanism also tries to minimize overheads transmitted between Mobile Subscriber Station (MSS) and Base Station (BS) by eliminate MOB-SLP-REQ/RSP messages.
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