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Adaptive Power Management Mechanism Considering Remaining Energy in IEEE 802.16e

This letter proposes a new adaptive power management mechanism (APM 2 ) which takes into account the remaining energy in an IEEE 802.16e system. Benefits of the mechanism are the reduction of frame response delay in a state with sufficient remaining energy, and an increase in the life of a station in a state of insufficient remaining energy. An analytical model for sleep mode operation is developed, and the proposed mechanism is validated by computer simulation.