We describe our improvements to the IEEE 802.11 support in the Monarch version of the ns network simulator. Our extensions add several management features needed for power management, such as beacon frames and the timing synchronization function. We implement the queuing and traffic announcement facilities at the core of power management. Amethod for recording the energy consumption of the wireless interface is also presented. Several other enhancements are discussed, such as support for the 802.11b high-rate PHY and corrections to existing features in the simulator. These changes greatly increase the usefulness of ns for researchers studying the performance of ad hoc networks under power management.

47 pages

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