With the recent spread of the Internet of Things (IoT), smart devices are equipped with a number of sensors to collect data necessary for various applications. A wake-up radio (WUR) is considered a core technology used to overcome the overhead problems of smart devices associated with sensors such as the limited battery lifetime, bandwidth, and inter-related radio range. However, WUR has difficulty adapting a wake-up schedule to unpredictable traffic patterns, which inherently cause communication latency. We propose a WUR discovery frame to carry information for unassociated stations (STAs) to perform WUR-resilient scanning for nearby access points (APs). Furthermore, a WUR discovery channel is proposed to improve location services and roaming purposes.