According to various embodiments of the invention a device can announce broadcast traffic in a global access period. Thus, a destination can change its local communication window every global access period. By announcing a local communication window during a global access period it can be more likely that a source device in a network will receive the information because all devices should be active during the global access period. A device can awaken for its local communication window and during the local communication window a source device can schedule a transmission and transmit information to the device.