{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,20]],"date-time":"2026-05-20T16:04:18Z","timestamp":1779293058724,"version":"3.51.4"},"reference-count":60,"publisher":"MDPI AG","issue":"9","license":[{"start":{"date-parts":[[2025,9,18]],"date-time":"2025-09-18T00:00:00Z","timestamp":1758153600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Project of the Ministry of Science and Technology","award":["G2022041009L"],"award-info":[{"award-number":["G2022041009L"]}]},{"name":"Project of the Ministry of Science and Technology","award":["2021GY-072"],"award-info":[{"award-number":["2021GY-072"]}]},{"name":"Project of the Ministry of Science and Technology","award":["2024GHCJ015"],"award-info":[{"award-number":["2024GHCJ015"]}]},{"name":"Project of the Ministry of Science and Technology","award":["2024GHCJ028"],"award-info":[{"award-number":["2024GHCJ028"]}]},{"name":"Key Research and Development Plan of Shaanxi Province","award":["G2022041009L"],"award-info":[{"award-number":["G2022041009L"]}]},{"name":"Key Research and Development Plan of Shaanxi Province","award":["2021GY-072"],"award-info":[{"award-number":["2021GY-072"]}]},{"name":"Key Research and Development Plan of Shaanxi Province","award":["2024GHCJ015"],"award-info":[{"award-number":["2024GHCJ015"]}]},{"name":"Key Research and Development Plan of Shaanxi Province","award":["2024GHCJ028"],"award-info":[{"award-number":["2024GHCJ028"]}]},{"name":"Xi\u2019an University of Technology","award":["G2022041009L"],"award-info":[{"award-number":["G2022041009L"]}]},{"name":"Xi\u2019an University of Technology","award":["2021GY-072"],"award-info":[{"award-number":["2021GY-072"]}]},{"name":"Xi\u2019an University of Technology","award":["2024GHCJ015"],"award-info":[{"award-number":["2024GHCJ015"]}]},{"name":"Xi\u2019an University of Technology","award":["2024GHCJ028"],"award-info":[{"award-number":["2024GHCJ028"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["BDCC"],"abstract":"<jats:p>Communications in intelligent transportation systems (ITS) face explosive data growth from applications such as autonomous driving, remote diagnostics, and real-time monitoring, imposing severe challenges on limited spectrum, bandwidth, and latency. Reliable semantic image reconstruction under noisy channel conditions is critical for ITS perception tasks, since noise directly impacts the recognition of both static infrastructure and dynamic obstacles. Unlike traditional approaches that aim to transmit all image data with equal fidelity, effective ITS communication requires prioritizing task-relevant dynamic elements such as vehicles and pedestrians while filtering out largely static background features such as buildings, road signs, and vegetation. To address this, we propose an Offline Knowledge Base and Attention-Driven Semantic Communication (OKBASC) framework for image-based applications in ITS scenarios. The proposed framework performs offline semantic segmentation to build a compact knowledge base of semantic masks, focusing on dynamic task-relevant regions such as vehicles, pedestrians, and traffic signals. At runtime, precomputed masks are adaptively fused with input images via sparse attention to generate semantic-aware representations that selectively preserve essential information while suppressing redundant background. Moreover, we introduce a further Bi-Level Routing Attention (BRA) module that hierarchically refines semantic features through global channel selection and local spatial attention, resulting in improved discriminability and compression efficiency. Experiments on the VOC2012 and nuPlan datasets under varying SNR levels show that OKBASC achieves higher semantic reconstruction quality than baseline methods, both quantitatively via the Structural Similarity Index Metric (SSIM) and qualitatively via visual comparisons. These results highlight the value of OKBASC as a communication-layer enabler that provides reliable perceptual inputs for downstream ITS applications, including cooperative perception, real-time traffic safety, and incident detection.<\/jats:p>","DOI":"10.3390\/bdcc9090240","type":"journal-article","created":{"date-parts":[[2025,9,18]],"date-time":"2025-09-18T14:45:46Z","timestamp":1758206746000},"page":"240","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Offline Knowledge Base and Attention-Driven Semantic Communication for Image-Based Applications in ITS Scenarios"],"prefix":"10.3390","volume":"9","author":[{"ORCID":"https:\/\/orcid.org\/0009-0000-0484-5949","authenticated-orcid":false,"given":"Yan","family":"Xiao","sequence":"first","affiliation":[{"name":"College of Automation and Information Engineering, Xi\u2019an University of Technology, Xi\u2019an 710048, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xiumei","family":"Fan","sequence":"additional","affiliation":[{"name":"College of Automation and Information Engineering, Xi\u2019an University of Technology, Xi\u2019an 710048, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Zhixin","family":"Xie","sequence":"additional","affiliation":[{"name":"College of Automation and Information Engineering, Xi\u2019an University of Technology, Xi\u2019an 710048, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yuanbo","family":"Lu","sequence":"additional","affiliation":[{"name":"College of Automation and Information Engineering, Xi\u2019an University of Technology, Xi\u2019an 710048, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2025,9,18]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"115","DOI":"10.1007\/s42421-020-00020-1","article-title":"Applications of deep learning in intelligent transportation systems","volume":"2","author":"Haghighat","year":"2020","journal-title":"J. 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