Patent ID: 8401551

Claim:
A method of operating a communication system comprising a NetWork (NW) and a User Equipment (UE), a Non Access Stratum (NAS) via which the NW and the UE communicate with each other, and an Access Stratum (AS) providing a physical connection to enable the NAS communication between the NW and the UE to be achieved, the physical connection including a wireless radio link to the UE, the method comprising: sending information from the NW to the UE to determine at least one action of the UE in response to a failure of a radio link to the UE; detecting a Radio Link Failure (RLF); in response to the detecting of the RLF, deciding on an action to be performed by the UE according to the information; and performing, by the UE, the decided action, wherein the decided action comprises at least one of triggering of a service request, triggering of a Tracking Area Update (TAU), and triggering of a Routing Area Update (RAU).