A communication control method is performed by a user equipment in a mobile communication system providing a multicast broadcast service (MBS). The communication control method comprises receiving, by the user equipment, from a network node, an MBS configuration including information used for reception of an MBS session, through a radio resource control (RRC) release message; and receiving, by the user equipment, from the network node, a modification of the MBS configuration through a multicast control channel (MCCH) related to the MBS session, when the user equipment is in an RRC inactive state and the MBS configuration is updated.