Patent ID: 8588745

Claim:
A mobile communications system, comprising: a mobile communications device; a base station; and a network communications node, wherein the mobile communications device comprises: means for generating a Service Request; means for sending the Service Request to the base station; means for receiving a Service Accept message from the base station without reconfiguration data; and means for transferring data with the base station using an existing radio bearer to provide a service requested in the Service Request, wherein the base station comprises: a first receiver for receiving the Service Request from the mobile communications device; a first sender for sending the Service Request to the network communications node; a second receiver for receiving a Service Accept message from the network communications node; a second sender for sending the Service Accept message to the mobile communications device without reconfiguration data; and means for transferring data with the mobile communications device using an existing radio bearer to provide the service requested in the Service Request, and wherein the network communications node comprises: means for receiving a Service Request from a base station; means for obtaining a parameter value that depends upon a purpose of the Service Request; means for determining if security is required to be activated for the requested service based on said parameter value; and means for sending a Service Accept message to the base station without security parameters if said determining means determines that security is not required to be activated and for sending a Service Accept message to the base station with security parameters if said means for determining determines that security is required to be activated.