Packet Splitting in Finite Blocklength MIMO E-SDM: Design and Performance Analysis Under Multi-Connectivity

To meet the quality demands of industries for future communication networks, it is crucial to explore wireless communication technologies with low latency and high reliability. In wireless networks, multi-connectivity (MC) technologies can improve performance in terms of data rate, reliability, and latency. To realize the vision of ultra-reliable and low latency communications (URLLC), the design and performance analysis of transmission schemes for short packet communication are required. In this paper, we propose MC transmission schemes based on packet splitting (SP) for the multiple-input multipleoutput (MIMO) eigenbeam-space division multiplexing (E-SDM) system architecture over quasi-static fading channels in the finite blocklength regime, accompanied by theoretical performance evaluations. Analytical expressions for the decoding error probability across distinct eigenbeams are derived to enable comparative analysis of the transmission performance. Simulation results validate the theoretical derivations, demonstrating that the flexible design of transmission mechanisms leveraging eigenbeam characteristics can further unlock the reliable performance of short packet communication.