Radio resource control

There is provided a radio system including a network element and at least one user terminal supporting MBMS (multimedia broadcast multicast service), the network element being configured to transmit MBMS control information elements from the network element to the user terminal for controlling an MBMS session. The network element comprises: a detection unit for detecting a requirement for more capacity for an MBMS session in the radio system; a processing unit for including an MBMS bearer description in an MBMS control information element to be transmitted to the user terminal, the MBMS bearer description including an assignment to a given MBMS bearer depending on the detected requirement for more capacity; and a transmission unit for performing an MBMS transmission between the network element and the user terminal on the assigned MBMS bearer on the basis of the MBMS bearer description included in the MBMS control information element.