Providing a public warning system message

1. A method for relaying Public Warning System (PWS) messages, the method comprising:

receiving, at a relay user equipment (UE), a PWS message from a base station, wherein the relay UE receives the PWS message including a PWS message identifier having a first set of values from the base station over a first communication technology;

generating, by the relay UE, a first output message comprising at least part of the PWS message, the first output message including at least a first parameter, a second parameter and an output message identifier, wherein the first parameter is used to indicate that the PWS message corresponds to a certain type of warning message, wherein the second parameter is used to distinguish between different PWS messages; and

transmitting, by the relay UE, the first output message to a remote UE, wherein the relay UE transmits the first output message to the remote UE over a second communication technology, the second communication technology being different from the first communication technology,

wherein the output message identifier includes a second set of values different than the first set of values based on either or both of the PWS message and a type of the first communication technology,

wherein the output message identifier indicates a source of the PWS message,

wherein the relay UE formats the first output message prior to transmitting the first output message to the remote UE, wherein the first output message is formatted based on the output message identifier within the first output message.

2. The method of claim 1 , wherein the first communication technology comprises a radio access technology (RAT) and wherein the second communication technology comprises a short-range communication technology.

3. The method of claim 2 , wherein the PWS message is received over the RAT in a telecommunications network, the telecommunications network comprising a Global System for Mobile communications (GSM)/Enhanced Data rates for GSM Evolution (EDGE) Radio Access Network (GERAN), a Universal Mobile Telecommunications System (UMTS), Universal Terrestrial Radio Access Network (UTRAN), an Evolved UTRAN (E-UTRAN), or a new generation Radio Access Network.

4. The method of claim 2 , wherein the transmitting comprises the relay UE relaying all or part of the PWS message over the short-range communication technology to the remote UE via a Device to Device (D2D) interface.

5. The method of claim 4 , further comprising:

receiving, by the relay UE, a secondary PWS message related to the PWS message, wherein the relay UE receives the secondary PWS message from the base station over the RAT;

generating, by the relay UE, a second output message containing all or part of the secondary PWS message related to the PWS message, wherein generating the second output message comprises the relay UE formatting the second output message to include at least one of a serial number, a message identifier, or a data coding scheme; and

responsive to formatting the second output message, relaying, by the relay UE, the second output message to the remote UE over the short-range communication technology.

6. The method of claim 5 , wherein the second output message is relayed over the short-range communication technology via the D2D interface, wherein the D2D interface comprises a PC5 interface.

7. The method of claim 2 , wherein the relay UE relays, over the short-range communication technology, the PWS message as a Decentralized Environmental Notification Message (DENM) to the remote UE, wherein the remote UE is not configured to receive the PWS message from the base station over the first communication technology, wherein the relay UE provides an indication that the first output message contains a PWS message, and wherein the indication comprises a destination Layer-2 identifier.

8. A relay user equipment (UE) comprising:

a memory containing instructions; and

a processor coupled to the memory and configured upon execution of the instructions to:

receive, at the relay UE, a Public Warning System (PWS) message from a base station, wherein the relay UE receives the PWS message including a PWS message identifier having a first set of values from the base station over a first communication technology;

generate, by the relay UE, a first output message comprising at least part of the PWS message, the first output message including at least a first parameter, a second parameter and an output message identifier, wherein the first parameter is used to indicate that the PWS message corresponds to a certain type of warning message, wherein the second parameter is used to distinguish between different PWS messages; and

transmit, by the relay UE, the first output message to a remote UE, wherein the relay UE transmits the first output message to the remote UE over a second communication technology, the second communication technology being different from the first communication technology,

wherein the output message identifier includes a second set of values different than the first set of values based on either or both of the PWS message and a type of the first communication technology,

wherein the output message identifier indicates a source of the PWS message,

wherein the relay UE formats the first output message prior to transmitting the first output message to the remote UE, wherein the first output message is formatted based on the output message identifier within the first output message.

9. The relay UE of claim 8 , wherein the first communication technology comprises a radio access technology (RAT) and wherein the second communication technology comprises a short-range communication technology.

10. The relay UE of claim 9 , wherein the PWS message is received over the RAT in a telecommunications network, the telecommunications network comprising a Global System for Mobile communications (GSM)/Enhanced Data rates for GSM Evolution (EDGE) Radio Access Network (GERAN), a Universal Mobile Telecommunications System (UMTS), Universal Terrestrial Radio Access Network (UTRAN), an Evolved UTRAN (E-UTRAN), or a new generation Radio Access Network.

11. The relay UE of claim 9 , wherein the transmitting comprises the relay UE relaying all or part of the PWS message over the short-range communication technology to the remote UE via a Device to Device (D2D) interface.

12. The relay UE of claim 11 , wherein the processor is further configured upon execution of the instructions to:

receive, by the relay UE, a secondary PWS message related to the PWS message, wherein the relay UE receives the secondary PWS message from the base station over the RAT;

generate, by the relay UE, a second output message containing all or part of the secondary PWS message related to the PWS message, wherein generating the second output message comprises the relay UE formatting the second output message to include at least one of a serial number, a message identifier, or a data coding scheme; and

responsive to formatting the second output message, relay, by the relay UE, the second output message to the remote UE over the short-range communication technology.

13. The relay UE of claim 12 , wherein the second output message is relayed over the short-range communication technology via the D2D interface, wherein the D2D interface comprises a PC5 interface.

14. The relay UE of claim 9 , wherein the relay UE relays, over the short-range communication technology, the PWS message as a Decentralized Environmental Notification Message (DENM) to the remote UE, wherein the remote UE is not configured to receive the PWS message from the base station over the first communication technology, wherein the relay UE provides an indication that the first output message contains a PWS message, and wherein the indication comprises a destination Layer-2 identifier.

15. A non-transitory computer readable medium containing instructions executable by a processor of a relay user equipment (UE) such that when executed cause the processor to:

receive, at the relay UE, a Public Warning System (PWS) message from a base station, wherein the relay UE receives the PWS message including a PWS message identifier having a first set of values from the base station over a first communication technology;

generate, by the relay UE, a first output message comprising at least part of the PWS message, the first output message including at least a first parameter, a second parameter and an output message identifier, wherein the first parameter is used to indicate that the PWS message corresponds to a certain type of warning message, wherein the second parameter is used to distinguish between different PWS messages; and

transmit, by the relay UE, the first output message to a remote UE, wherein the relay UE transmits the first output message to the remote UE over a second communication technology, the second communication technology being different from the first communication technology,

wherein the output message identifier includes a second set of values different than the first set of values based on either or both of the PWS message and a type of the first communication technology,

wherein the output message identifier indicates a source of the PWS message,

wherein the relay UE formats the first output message prior to transmitting the first output message to the remote UE, wherein the first output message is formatted based on the output message identifier within the first output message.

16. The non-transitory computer readable medium of claim 15 , wherein the first communication technology comprises a radio access technology (RAT) and wherein the second communication technology comprises a short-range communication technology.

17. The non-transitory computer readable medium of claim 16 , wherein the PWS message is received over the RAT in a telecommunications network, the telecommunications network comprising a Global System for Mobile communications (GSM)/Enhanced Data rates for GSM Evolution (EDGE) Radio Access Network (GERAN), a Universal Mobile Telecommunications System (UMTS), Universal Terrestrial Radio Access Network (UTRAN), an Evolved UTRAN (E-UTRAN), or a new generation Radio Access Network.

18. The non-transitory computer readable medium of claim 16 , wherein the transmitting comprises the relay UE relaying all or part of the PWS message over the short-range communication technology to the remote UE via a Device to Device (D2D) interface.

19. The non-transitory computer readable medium of claim 18 , wherein the processor is further configured upon execution of the instructions to:

receive, by the relay UE, a secondary PWS message related to the PWS message, wherein the relay UE receives the secondary PWS message from the base station over the RAT;

generate, by the relay UE, a second output message containing all or part of the secondary PWS message related to the PWS message, wherein generating the second output message comprises the relay UE formatting the second output message to include at least one of a serial number, a message identifier, or a data coding scheme; and

responsive to formatting the second output message, relay, by the relay UE, the second output message to the remote UE over the short-range communication technology.

20. The non-transitory computer readable medium of claim 19 , wherein the second output message is relayed over the short-range communication technology via the D2D interface, wherein the D2D interface comprises a PC5 interface.

21. The non-transitory computer readable medium of claim 16 , wherein the relay UE relays, over the short-range communication technology, the PWS message as a Decentralized Environmental Notification Message (DENM) to the remote UE, wherein the remote UE is not configured to receive the PWS message from the base station over the first communication technology, wherein the relay UE provides an indication that the first output message contains a PWS message, and wherein the indication comprises a destination Layer-2 identifier.