Adaptive modulation coding method for deterministic low-delay retransmission

• Main Authors: WANG WEI, WANG YIDU, JIN YUZE, ZHANG CHAOYANG
• Format: Patent
• Language: Chinese; English
• Published: 13.08.2024
• Subjects: CALCULATING; COMPUTER SYSTEMS BASED ON SPECIFIC COMPUTATIONAL MODELS; COMPUTING; COUNTING; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; PHYSICS; TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION

The invention discloses an adaptive modulation and coding method for deterministic low-delay retransmission. In order to optimize average time delay on the premise of meeting deterministic time delay constraints, modulation coding schemes of an initial transmission queue and a retransmission queue are dynamically selected. In order to solve the problem of coupling between time slots of queues, a multi-step Q learning method based on an updating system is provided to re-acquire a value function of the system when an updating event is triggered. A virtual queue corresponding to a deterministic time delay constraint is constructed, and a cost function based on the virtual queue and an actual queue is designed to be used in value function learning. And based on the obtained value function, the system determines a modulation coding scheme to be adopted according to the current queue length. The proposed adaptive modulation coding scheme can meet the deterministic delay constraint and minimize the average delay. Th