A dynamic resource allocation algorithm to satisfy the packet delay requirements for real-time services. while maximizing the system capacity in multiuser orthogonal frequency division multiplexing (OFDM) systems is introduced. Our proposed cross-layer algorithm. called Dynamic Subcarrier Allocation algorithm for Real-time Traffic (DSA-RT). https://www.lightemupsequences.com/limited-save-Custom-Congratulations-Banner-p4839-hot-choice/