1. A method performed by a wireless communication device for monitoring for a paging message from a core network node in a wireless communications network, the method comprising:obtaining, from the core network node, a length of a paging transmission window, the paging transmission window comprising a time period for monitoring paging after a discontinuous reception timer for an extended idle mode expires;
starting the discontinuous reception timer for the extended idle mode when the wireless communication device registers to the core network node, wherein the extended idle mode is longer than a frame number range of the wireless communications network;
when the discontinuous reception timer expires, monitoring for the paging message at one or more paging occasions during the time period for monitoring paging, wherein a starting time of the time period is based on: an instant of time when the wireless communication device registers to the core network node; and a length of the discontinuous reception timer; and
resetting the discontinuous reception timer in response to a successful procedure requiring Non-Access Stratum, NAS, layer communication between the wireless communication device and the core network node.