Knowledge-Based Ultra-Low-Latency Semantic Communications for Robotic Edge Intelligence
<|reference_start|>Knowledge-Based Ultra-Low-Latency Semantic Communications for Robotic Edge Intelligence: The 6G mobile networks will feature the widespread deployment of AI algorithms at the network edge, which provides a platform for supporting robotic edge intelligence systems. In such a system, a large-scale knowledge graph (KG) is operated at an edge server as a "remote brain" to guide remote robots on environmental exploration or task execution. In this paper, we present a new air-interface framework targeting the said systems, called knowledge-based robotic semantic communications (SemCom), which consists of a protocol and relevant transmission techniques. First, the proposed robotic SemCom protocol defines a sequence of system operations for executing a given robotic task. They include identification of all task-relevant knowledge paths (KPs) on the KG, semantic matching between KG and object classifier, and uploading of robot's observations for objects recognition and feasible KP identification. Next, to support ultra-low-latency feature transmission (ULL-FT), we propose a novel transmission approach that exploits classifier's robustness, which is measured by classification margin, to compensate for a high bit error probability (BEP) resulting from ultra-low-latency transmission (e.g., short packet and/or no coding). By utilizing the tractable Gaussian mixture model, we derive the relation between BEP and classification margin, which sheds light on system requirements to support ULL-FT. Furthermore, for the case where the classification margin is insufficient for coping with channel distortion, we enhance the ULL-FT approach by studying retransmission and multi-view classification for enlarging the margin and further quantifying corresponding requirements. Finally, experiments using DNNs as classifier models and real datasets are conducted to demonstrate the effectiveness of ULL-FT in communication latency reduction while providing a guarantee on accurate feasible KP identification.<|reference_end|>
@article{zeng2024knowledge-based,
    title={Knowledge-Based Ultra-Low-Latency Semantic Communications for Robotic
  Edge Intelligence},
    author={Qunsong Zeng, Zhanwei Wang, You Zhou, Hai Wu, Lin Yang, Kaibin Huang},
    journal={arXiv preprint arXiv:2409.13319},
    year={2024},
    archivePrefix={arXiv},
    eprint={2409.13319},
    primaryClass={cs.IT math.IT}
}