  In this paper, we study resource allocation for downlink orthogonal frequency
division multiple access (OFDMA) systems with the objective to enable
ultra-reliable low latency communication (URLLC). To meet the stringent delay
requirements of URLLC, the impact of short packet communication is taken into
account for resource allocation algorithm design. In particular, the resource
allocation design is formulated as a weighted system sum throughput
maximization problem with quality-of-service (QoS) constraints for the URLLC
users. The formulated problem is non-convex, and hence, finding the global
optimum solution entails a high computational complexity. Thus, an algorithm
based on successive convex optimization is proposed to find a sub-optimal
solution with polynomial time complexity. Simulation results confirm that the
proposed algorithm facilities URLLC and significantly improves the system sum
throughput compared to two benchmark schemes.
