This paper proposes a low power real-time packet scheduling scheme that reduces power consumption and network errors on wireless local area networks. The proposed scheme is based on the dynamic modulation scheme which can scale the number of bits per symbol when time slots are unused, and the reclaiming scheme which can switch the primary polling schedule when a specific station falls into a bad state. Built on top of the EDF scheduling policy, the proposed scheme enhances the power performance without violating the constraints of subsequent real-time streams. The simulation results show that the proposed scheme enhances success ratio and reduces power consumption.