Reliable O-RAN-inspired Latency-constrained Wireless Transport Networks in 6G

The extreme requirements for high reliability and low latency in the upcoming Sixth Generation (6G) wireless networks are challenging the design of multi-hop relay networks. Inspired by the advent of the virtualization concept in the wireless networks design and openness paradigm as fostered by the O-RAN Alliance, we target a revolutionary resource scheduling scheme to improve the overall transmission efficiency. In this paper, we investigate the problem of multi-hop decode-and-forward (DF) relaying in the finite blocklength (FBL) regime, and propose a Dynamic Multi-Hop HARQ (DMH-HARQ) scheme, which maximizes the end-to-end (E2E) communication reliability in such systems. We also propose an integer dynamic programming (DP) algorithm to efficiently solve the optimal DMH-HARQ schedule. Constrained within a certain time frame to accomplish multi-hop relaying, our proposed