A signalling method

And a drain of the control in the invention relates to cellular communication system, wherein the. To the invention, during of the novel MM connected; the inspection with a RRC connection of activation. And a RRC connection that the activation, and signal of obviously a. Otherwise, a RRC layer event can be used by the concealed mode controlled MM layer event. MM during the baseplate; the inspection with the MM protocol is the RRC connection, and a such condition; the drain of MM connection and obviously and signal informing.