Patent ID: 8005040

Claim:
A method, comprising: reserving at least two different signaling radio bearers for a connection on one control plane signaling channel of a mobile communication system, the at least two different signaling radio bearers being control plane radio bearers and having different signaling radio bearer identities, a signaling radio bearer identity being other than a service access point identifier and indicating a content type that may be sent over a corresponding signaling radio bearer; indicating a control plane frame that contain signaling by a first signaling radio bearer identity; indicating a control plane frame that may contain user data by a second signaling radio bearer identity; checking whether a control plane frame sent in a previous cycle was associated with the first signaling radio bearer identity; and pre-empting control plane frames on a media access control sublayer of a data link layer, wherein the pre-empting comprises discarding every second control plane frame relating to the first signaling radio bearer identity when the control plane frame sent in the previous cycle was associated with the first signaling radio bearer identity and there is a control plane frame relating to the second signaling radio bearer identity to be transmitted.