A communication device for multi-radio access technology (RAT) communications includes one or more processors and a plurality of transceivers. Each transceiver is configured to operate in at least one RAT of a plurality of RATs. The processors are configured to establish connection with a second communication device using a first transceiver of the plurality of transceivers and a first RAT of the plurality of RATs. A first data stream associated with a communication link connected to the second communication device and a third communication device is receive via a convergence function at the second communication device. The communication link uses a second RAT of the plurality of RATs. A code sequence is applied to a second data stream to generate an encoded second data stream, which is transmitted to the third communication device via a second communication link established based on information received via the first data stream.