Unicast support in prose direct device-to-device communication

1. A method of wireless communication, comprising:

receiving a unicast device-to-device communication including a destination identifier and a header, the header including a sidelink shared channel (SL-SCH) subheader;

receiving a multicast device-to-device communication including the destination identifier; and

differentiating the unicast device-to-device communication from the multicast device-to-device communication based on a media access control (MAC) version number provided in the SL-SCH subheader in the header of the unicast device-to-device communication.

2. The method of claim 1 , further comprising:

determining if unicast signaling has been performed with a sending device when the unicast device-to-device communication is differentiated from the multicast device-to-device communication; and

processing the unicast device-to-device communication when it is determined that the unicast signaling has been performed with the sending device.

3. The method of claim 1 , wherein the header of the unicast device-to-device communication comprises the destination identifier and a unicast source identifier.

4. The method of claim 3 , further comprising:

processing the unicast device-to-device communication based on one or more of the MAC version number, the destination identifier, or the unicast source identifier included in the header of the unicast device-to-device communication.

5. The method of claim 3 , further comprising:

identifying one or more of a packet data convergence protocol (PDCP) entity or a radio link control (RLC) entity based on one or more of the MAC version number, the destination identifier, the unicast source identifier included in the header of the unicast device-to-device communication, or a logical channel identifier.

6. A method of wireless communication, comprising:

configuring a media access control (MAC) version number in a sidelink shared channel (SL-SCH) subheader in a header of a data packet intended for a receiver device such that a unicast device-to-device communication and a multicast device-to-device communication will be distinguishable by the receiver device based on the MAC version number; and

transmitting the data packet to the receiver device.

7. The method of claim 6 , further comprising:

performing unicast signaling with the receiver device prior to transmitting the data packet.

8. The method of claim 6 , wherein the configuring further comprises configuring a destination identifier and a unicast source identifier in the data packet header of the data packet.

9. An apparatus for wireless communication, comprising:

means for receiving a unicast device-to-device communication including a destination identifier;

means for receiving a multicast device-to-device communication including the destination identifier and a header, the header including a sidelink shared channel (SL-SCH) subheader; and

means for differentiating the unicast device-to-device communication from the multicast device-to-device communication based on a media access control (MAC) version number provided in the SL-SCH subheader in the header of the unicast device-to-device communication.

10. The apparatus of claim 9 , further comprising:

means for determining if unicast signaling has been performed with a sending device when the unicast device-to-device communication is differentiated from the multicast device-to-device communication; and

means for processing the unicast device-to-device communication when it is determined that the unicast signaling has been performed with the sending device.

11. The apparatus of claim 9 , wherein the header of the unicast device-to-device communication comprises the destination identifier and a unicast source identifier.

12. The apparatus of claim 11 , further comprising:

means for processing the unicast device-to-device communication based on one or more of the MAC version number, the destination identifier, or the unicast source identifier included in the header of the unicast device-to-device communication.

13. The apparatus of claim 11 , further comprising:

means for identifying one or more of a packet data convergence protocol (PDCP) entity or a radio link control (RLC) entity based on one or more of the MAC version number, the destination identifier, the unicast source identifier included in the header of the unicast device-to-device communication, or a logical channel identifier.

14. An apparatus for wireless communication, comprising:

means for configuring a media access control (MAC) version number in a sidelink shared channel (SL-SCH) subheader in a header of a data packet intended for a receiver device such that a unicast device-to-device communication and a multicast device-to-device communication will be distinguishable by the receiver device based on the MAC version number; and

means for transmitting the data packet to the receiver device.

15. The apparatus of claim 14 , further comprising:

means for performing unicast signaling with the receiver device prior to transmitting the data packet.

16. The apparatus of claim 14 , wherein the means for configuring is configured to configure a destination identifier and a unicast source identifier in the data packet header of the data packet.