A first user equipment (UE) is configured to establish a device-to-device (D2D) connection with a second UE, generate internet protocol (IP) packets for uplink (UL) transmission to a network and identifying a quality of service (QOS) flow for the packets, encapsulate each packet with a header comprising a Qos flow identifier (QFI), transmit a first portion of the encapsulated packets to the network via a first radio link and transmitting a second portion of the encapsulated packets to the second UE via the D2D connection for transmission to the network via a second radio link of the second UE.