Hierarchical Sparse Vector Transmission for Ultra Reliable and Low Latency Communications

TL;DR

This paper introduces a hierarchical sparse vector transmission scheme designed for multi-user ultra-reliable low-latency communication, improving decoding efficiency and error performance over existing methods.

Contribution

It proposes a novel hierarchical SVT scheme that separates common and private information, enhancing decoding and reliability in URLLC scenarios.

Findings

Outperforms existing SVT schemes in block error rate

Effective separation of common and private information

Improved reliability in multi-user URLLC

Abstract

Sparse vector transmission (SVT) is a promising candidate technology for achieving ultra-reliable low-latency communication (URLLC). In this paper, a hierarchical SVT scheme is proposed for multi-user URLLC scenarios. The hierarchical SVT scheme partitions the transmitted bits into common and private parts. The common information is conveyed by the indices of non-zero sections in a sparse vector, while each user's private information is embedded into non-zero blocks with specific block lengths. At the receiver, the common bits are first recovered from the detected non-zero sections, followed by user-specific private bits decoding based on the corresponding non-zero block indices. Simulation results show the proposed scheme outperforms state-of-the-art SVT schemes in terms of block error rate.