Adaptive Transmission Design in TDMA Uplink System with Status Update and Throughput Services

In this paper, we consider the TDMA uplink system, where multiple status update devices and multiple throughput service devices upload their traffics to one access point in TDMA mode, and all devices are assumed to be provisioned with data buffer to store data before transmission. In order to meet the fresh status update requirements, the maximal allowed long term average age of information (AoI) of all status update devices is specified. On the basis, the sum rate maximization problem of all throughput service devices is presented to derive the adaptive TDMA uplink transmission scheme that meets the AoI requirements. Our analysis results show that, the proposed adaptive TDMA uplink transmission scheme can effectively coordinate different performance requirements of status update and throughput service by explicitly introducing AoI requirements in the adaptive transmission design, so as to ensure heterogeneous multiple access requirements.