Systems and methods described herein provide improved access to wireless devices in Power Saving Mode (PSM) and extended Discontinuous Reception (eDRX) sleep. A mobility management entity (MME) receives a wake-up time request for a wireless device, wherein the wake-up time request includes a designated wake-up time for the wireless device to receive data services. The MME device stores the designated wake-up time when the designated wake-up time is after a current tracking area update (TAU) window for the wireless device and receives, after the storing, a TAU request for the wireless device. The MME device sends, in response to the TAU request, a TAU response that includes the designated wake-up time.