System and method for device-to-device communication with evolved machine type communication

A method of wireless communication, comprising:

• receiving a first packet at a PC5 interface protocol stack of a first user equipment (UE) from a second UE, the first packet including a header that identifies the first packet as relayed uplink traffic intended for a base station from the second UE;
• receiving a second packet at a Uu protocol stack of the first UE, the second packet intended for the base station from the first UE;
• transferring the first packet from the PC5 interface protocol stack of the first UE to the Uu protocol stack of the first UE;
• combining the first packet and the second packet to produce a combined packet;
• modifying a header of the combined packet at the Uu protocol stack to identify the first packet as relayed uplink traffic from the second UE and the second packet as local data from the first UE;
• and
• transmitting the combined packet including the modified header to the base station;
• wherein the modified header includes an index of a system architecture evolution (SAE) temporary mobile subscriber identity (S-TMSI) table associated with the second UE.

A method of wireless communication by a base station, comprising:

• receiving a data transmission from a first UE, the data transmission including a combined packet that includes a header, the combined packet including a first packet associated with the first UE, a second packet from a second UE, and a first index of a layer 2 identification (L2-ID) table associated with the first UE, wherein the header includes a second index of a system architecture evolution (SAE) temporary mobile subscriber identity (S-TMSI) table associated with the second UE;
• decoding the first packet using the first index of the L2-ID table for cell ratio temporary identifier (C-RNTI) mapping;
• and
• decoding the second packet using the second index of the S-TMSI table for C-RNTI mapping;
• wherein the first packet was transferred from a Uu protocol stack of the first UE to a PC5 interface protocol stack of the first UE.

An apparatus for wireless communication, comprising:

• means for receiving a packet at a Uu protocol stack of a first user equipment (UE), the packet intended for a base station;
• means for transferring the packet from the Uu protocol stack of the first UE to a PC5 interface protocol stack of the first UE;
• means for modifying a header of the packet at the PC5 interface protocol stack to identify the packet as relayed uplink traffic intended for the base station from the first UE;
• and
• means for transmitting the packet including the modified header to a second UE for relaying to the base station;
• wherein the means for modifying the header of the packet is configured to modify the header of the packet to include a system architecture evolution (SAE) temporary mobile subscriber identity (S-TMSI).