Aspects and embodiments relate generally to mechanisms to support power saving in a wireless communication network and more particularly to supporting discontinuous reception of a wake-up signal receiver at an apparatus comprising a wake-up signal receiver and a main radio receiver. One aspect provides an apparatus, comprising: a main radio receiver; a wake-up signal receiver; and a timer. The wake-up signal receiver comprises: circuitry configured to receive at least a portion of a broadcast message; circuitry configured to evaluate the received portion of the broadcast message to determine a time marker; and circuitry configured to provide the time marker to the timer. The apparatus may comprise a UE and may therefore be configured to align internal time keeping with the time keeping of a network, thus allowing discontinuous reception and associated energy savings, without transmission of additional specific synchronisation messaging by a network.