An aspect of the present disclosure includes methods, systems, and computer-readable media for establishing, at a first UE, a network connection with a first BS of a first communication network, transmitting a scheduling request for communication resources in a second communication network by tunneling to a second BS of the second communication network through the first BS of the first communication network, receiving from the first BS via the network connection, in response to the scheduling request, information for configuring the first UE for communicating with a second UE, configuring the first UE using the received information, and transmitting, directly, a message to the second UE using the communication resources in the second communication network.