Uplink Latency Characterization of Multimodal Data Transmission in Real-Time Wireless Systems

Transmission of large volume of multimodal data (MMD) in real-time wireless systems requires statistical guarantees on latency, as well as consideration of individual data profiles present in MMD to ensure high reliability of the overall system. Therefore, we consider a setup with MMD, i.e., heterogeneous data profiles and propose two schemes: <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">Compression and transmission (<i>CT</i>)</i> and <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">parallel compression and transmission (PCT)</i>, to analyse and optimize the latency incurred during uplink (UL) MMD transmission. <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">CT</i> follows a sequential process for compression and transmission, while <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">PCT</i> executes them in parallel. A non-convex optimization problem is formulated to minimize the UL latency. The results show that the proposed MMD schemes is advantageous over unimodal data consideration, as it prevents over-provisioning. Specifically, <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">PCT</i> reduces latency up to 68% for 0.9999 reliability level as compared to <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">CT</i>.