A method for delivering an Earthquake and Tsunami Warning Service, further referred to as ETWS, message, comprising: receiving (200, 400), at a radio access network, further referred to as RAN, a cell broadcasting service, further referred to as CBS, message containing an Earthquake and Tsunami Warning Service, further referred to as ETWS, message from a mobility management entity, further referred to as MME, in a core network via an S1 interface between the RAN and the MME; and sending (220, 410), by the RAN, the received CBS message including the ETWS message to at least one user equipment, further referred to as UE; wherein the sending the received CBS message to at least one UE comprises: sending the CBS message to the UE by system information; wherein the sending the CBS message to the at least one UE by system information comprises: sending the CBS message to the at least one UE by multiplexing the CBS message into multiple system information blocks, further referred to as SIBs; wherein the multiplexing the CBS message into multiple SIBs comprises: if a size of the ETWS message encapsulated within the CBS message sent to the at least one UE is larger than a size of each of the multiple SIBs, dividing the ETWS message encapsulated within the CBS message into multiple blocks, and multiplexing the multiple blocks for transmission; wherein the method further comprises: receiving, by the RAN, a digital signature information from the core network; and sending the received digital signature information to the at least one UE to trigger the at least one UE to authenticate security of the ETWS message in the CBS message; wherein the received digital signature information is encapsulated within a message, wherein the message containing the digital signature information comprises a CBS message different from the CBS message containing the ETWS message. receiving (200, 400), at a radio access network, further referred to as RAN, a cell broadcasting service, further referred to as CBS, message containing an Earthquake and Tsunami Warning Service, further referred to as ETWS, message from a mobility management entity, further referred to as MME, in a core network via an S1 interface between the RAN and the MME; and sending (220, 410), by the RAN, the received CBS message including the ETWS message to at least one user equipment, further referred to as UE; wherein the sending the received CBS message to at least one UE comprises: sending the CBS message to the UE by system information; wherein the sending the CBS message to the at least one UE by system information comprises: sending the CBS message to the at least one UE by multiplexing the CBS message into multiple system information blocks, further referred to as SIBs; wherein the multiplexing the CBS message into multiple SIBs comprises: if a size of the ETWS message encapsulated within the CBS message sent to the at least one UE is larger than a size of each of the multiple SIBs, dividing the ETWS message encapsulated within the CBS message into multiple blocks, and multiplexing the multiple blocks for transmission; wherein the method further comprises: receiving, by the RAN, a digital signature information from the core network; and sending the received digital signature information to the at least one UE to trigger the at least one UE to authenticate security of the ETWS message in the CBS message; wherein the received digital signature information is encapsulated within a message, wherein the message containing the digital signature information comprises a CBS message different from the CBS message containing the ETWS message. receiving, by the RAN, a digital signature information from the core network; and sending the received digital signature information to the at least one UE to trigger the at least one UE to authenticate security of the ETWS message in the CBS message; wherein the received digital signature information is encapsulated within a message, wherein the message containing the digital signature information comprises a CBS message different from the CBS message containing the ETWS message.