{
  "abstract": "Task-oriented communication improves communication efficiency by transmitting semantic information required for downstream tasks, but may incur redundancy with previously transmitted information. To address this issue, we propose a variational directed information bottleneck joint source-channel coding (VDIB-JSCC) framework that transmits only previously unacquired information. Specifically, we use directed information to characterize the causal flow of task-relevant incremental information and theoretically demonstrate its advantages over mutual information and conditional mutual information. Based on this metric, we formulate a directed information bottleneck (DIB) objective that balances task-relevant information preservation and redundant information compression. We further derive a variational formulation, termed VDIB, whose tractable upper bound serves as the training loss. The encoder integrates a Vision Transformer for frame-wise semantic extraction and a Mamba-based causal state-space model for capturing temporal dependencies and extracting incremental information, while the decoder uses a Mamba-based state-space model for task inference. Experiments on CIFAR-10 and CIFAR-100 video streams demonstrate that VDIB-JSCC achieves higher classification accuracy with less transmitted information than state-of-the-art semantic communication methods. These results show that leveraging historical knowledge enables task completion with less information, improving communication efficiency.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.16328",
  "author_total": 4,
  "authors": [
    {
      "name": "Zhirun Zheng"
    },
    {
      "name": "Yiqin Deng"
    },
    {
      "name": "Phone Lin"
    },
    {
      "name": "Yuguang Fang"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/d30dq30yej6jz.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.16328",
  "fulltext_url": null,
  "id": "d30dq30yej6jz",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.16328",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "cs.IT"
    ],
    [
      "arxiv",
      "math.IT"
    ],
    [
      "openalex",
      "2208|Advanced Wireless Communication Technologies"
    ]
  ],
  "openalex": "W7221785975",
  "pdf_url": "https://arxiv.org/pdf/2610.16328",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-12",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/d30dq30yej6jz.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:29:15Z",
      "native_id": "2610.16328",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.16328"
    }
  ],
  "subjects": [
    {
      "field": "mathematics",
      "origin": "arxiv:math.IT",
      "subfield": "general"
    }
  ],
  "title": "More Interactions Make Communications More Efficient: A Directed Information Bottleneck Approach to Task-Oriented Communication",
  "title_text": "More Interactions Make Communications More Efficient: A Directed Information Bottleneck Approach to Task-Oriented Communication",
  "type": "preprint",
  "updated_at": "2026-10-30T12:29:15Z",
  "url": "https://research.draconitic.com/paper/d30dq30yej6jz",
  "venue": "arXiv",
  "versions": []
}