Systems and methods for transmission and reception of a wake-up signal having a determined maximum length that is related to a maximum repetition value of another signal are disclosed. Embodiments of a method in a wireless device for determining a maximum length of a wake-up signal representing a maximum duration of the wake-up signal, the WUSmax value being related to a maximum repetition value representing a maximum number of repetitions of signals transmitted by a network node in a cellular communications network are disclosed. In some embodiments, the method in the wireless device includes receiving a Rmax value from the network node, determining a WUSmax value based on the Rmax value, and attempting to detect a wake-up signal from the network node using the determined WUSmax value.