There is provided determining an availability of a connection to a mobile non-terrestrial access node of a wireless communication system, determining, at the wireless device, coverage availability estimates of the mobile non-terrestrial access node, and determining at the wireless device, if the determined coverage availability estimates indicate a periodic coverage of the mobile non-terrestrial access node, a power save mode or one or more connection attempts to the mobile non-terrestrial access node, on the basis of a time period according to a periodicity of the determined coverage availability estimates.