Communicating over multiple radio access technologies (RATs)

1. A user equipment (UE) comprising:

a receiver;

a transmitter; and

a processor, operatively coupled to the receiver and the transmitter, wherein:

the transmitter and the processor are configured to transmit, using a first radio access technology (RAT), a service request message including information associated with at least one UE service,

the transmitter and the processor are configured to receive, based on the transmitted service request message, a message with information to setup a bearer for a second RAT, wherein the second RAT is a different RAT than the first RAT, and

the receiver and the processor are configured to receive multimedia data using the second RAT and simultaneously receive data using the first RAT, wherein the multimedia data received over the first RAT and the second RAT use a same packet data protocol and same security keys to recover the multimedia data.

2. The UE of claim 1 wherein the simultaneously received data is control data.

3. The UE of claim 1 wherein the received multimedia data is received using the bearer for the second RAT.

4. The UE of claim 1 wherein communication using the first RAT uses frequency division duplexing and communication using the second RAT uses time division duplexing.

5. The UE of claim 1 wherein a coverage area of a base station that the UE is communicating with using the first RAT is larger than a coverage area of a base station that the UE is communicating with using the second RAT.

6. The UE of claim 1 wherein the transmitter and the processor, in response to determining a loss of service of the second RAT, are configured to inform the first RAT of the loss of service of the second RAT.

7. The UE of claim 1 wherein control plane data is received using the first RAT and user plane data is received using the second RAT.

8. The UE of claim 1 wherein the receiver and the processor are configured to receive signaling using the first RAT and the second RAT from a same mobility control node.

9. A method performed by a user equipment (UE), the method comprising:

transmitting, using a first radio access technology (RAT), a service request message including information associated with at least one UE service,

receiving, based on the transmitted service request message, a message with information to setup a bearer for a second RAT, wherein the second RAT is a different RAT than the first RAT, and

receiving multimedia data using the second RAT and simultaneously receiving data using the first RAT, wherein the multimedia data received over the first RAT and the second RAT use a same packet data protocol and same security keys to recover the multimedia data.

10. The method of claim 9 wherein the simultaneously received data is control data.

11. The method of claim 9 wherein the received multimedia data is received using the bearer for the second RAT.

12. The method of claim 9 wherein communication using the first RAT uses frequency division duplexing and communication using the second RAT uses time division duplexing.

13. The method of claim 9 wherein a coverage area of a base station that the UE is communicating with using the first RAT is larger than a coverage area of a base station that the UE is communicating with using the second RAT.

14. The method of claim 9 further comprising in response to determining a loss of service of the second RAT, informing the first RAT of the loss of service of the second RAT.

15. The method of claim 9 wherein control plane data is received using the first RAT and user plane data is received using the second RAT.

16. The method of claim 9 further comprising receiving signaling using the first RAT and the second RAT from a same mobility control node.