Configuring a UE for multicast reception

A method for a UE of a wireless network, for receiving MBS data, the UE having previously joined an MBS session, the method at the UE comprising: receiving scrambling information associated with the MBS session; receiving a configuration message comprising an MBS configuration for continuing receiving MBS data from the previously joined MBS session, the MBS configuration being at least partially scrambled; and performing an unscrambling process on the received MBS configuration using the received scrambling information. The scrambling information may comprise a higher level identifier wherein the higher level identifier may comprise a Quality of Service flow identifier (QoS flow ID). The MBS configuration can comprise the scrambling information. The configuration message can be received by the UE in non-connected Radio Resource Control, RRC, state. The configuration message can be a MBs Control Channel, MCCH, message broadcast by a base station.