In certain embodiments, a method for use in a network node comprises sending a control information message to at least one wireless device that is in idle mode. The message comprises a mapping that maps a quasi co-location (QCL) assumption to a multicast transmission or multicast channel. For example, in certain embodiments, the multicast transmission or multicast channel is associated with a temporary multicast group indicator (TMGI), and the mapping maps the QCL assumption to the TMGI. The control information message causes the at least one wireless device to use the QCL assumption to decode the multicast transmission or multicast channel while in idle mode.