Performance Analysis for Uplink NOMA-based Cellular Network with M2M/H2H Co-Existence

Owing to the growing proliferation of machine type communication devices and other high-end devices in conventional human-to-human (H2H) communication, it is inevitable that these types of communications will co-exist with each other in the next generation of cellular communications. This study investigates an uplink cellular network with machine-to-machine (M2M) and H2H co-existence, where a machine type communication gateway is deployed as a relay in the cellular network to forward the M2M messages to the base station (BS). Non-orthogonal multiple access (NOMA) has been adopted to transmit the data of H2H and M2M communications to the BS simultaneously. Considering the different delay-sensitive transmissions of M2M/H2H communications, the expressions for outage probability and effective capacity (EC) are theoretically derived with the constraints of quality-of-service requirements. Simulation results show that the NOMA scheme outperforms the orthogonal multiple access in terms of outage probability and EC.