This disclosure relates to a method and a device for implementing hierarchical modulation of data streams. According to one of the exemplary embodiments, disclosure is directed to a method for hierarchical modulation of two data streams transmitted from a user device in a communication network. The method would include not limited to: sending, via a transceiver in the user device, a request for uplink bandwidth to an access node in the communication network; receiving, via the transceiver, an uplink bandwidth allocation provided in a downlink channel from the access node; multiplexing, at the user device, a base layer data stream and an enhanced layer data stream into a single multiplexed data stream; and transmitting, via the transceiver, the single multiplexed data stream to the access node in the uplink bandwidth allocation.