Patent ID: 8472355

Claim:
A method for broadcasting and transmitting an Earthquake and Tsunami Warning Service (ETWS) message, comprising: receiving, by a radio access network (RAN), a cell broadcasting service (CBS) message containing the ETWS message from a mobility management entity (MME) in a core network; sending, by the RAN, the received CBS message to at least one user equipment (UE); and sending, by the RAN, digital signature information to the UE to trigger the UE to authenticate security of the ETWS message contained in the CBS message according to the digital signature information, wherein the digital signature information being provided by the core network, wherein the digital signature information is sent to the RAN using one of: transmitting transparently the digital signature information by a government ETWS center to the MME, and sending the digital signature information by the MME to the RAN, encapsulating the digital signature information into the CBS message containing the ETWS message, and sending the CBS message to the RAN, or encapsulating the digital signature information into another CBS message which is different from the CBS message containing the ETWS message, and sending the another CBS message to the RAN.