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    "abbrevTitle": "SMPTE Mot. Imag. J",
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      "source": "parsed",
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    "abstract": "Leaf-spine architecture has been widely adopted as a scalable multistage network. However, for media transport purposes, nonblocking conditions for any combination of multicasts should be taken into account. In this paper, a new approach for building three-stage Clos networks with nonblocking multicast capability is proposed. First, a wide-sense nonblocking (WSNB) condition and a rearrangeable nonblocking (RNB) condition for nonblocking multicast networks are presented. The proposed conditions focus on the distribution of inputs at the middle stage rather than the distribution at the output stage. Second, the proposed conditions are evaluated by mapping to leaf-spine networks with commodity building block switches. The network size is evaluated by calculating the sum of the required building block switches. In the best case of the evaluation results, up to 50% of the switches can be reduced compared with the best-known WSNB condition, and the proposed WSNB networks show good coverage in relatively small but practical network sizes. The proposed RNB networks always show better results than the known RNB multicast conditions.",
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    "authors": [
      {
        "name": "Takeshi Shimizu",
        "orcid": "0000-0002-7671-9797"
      }
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      "version": "smpte-idams-publication@v1"
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      "version": "smpte-idams-publication@v1"
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      "holder": "SMPTE",
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        "confidence": "high",
        "note": "Ingested from SMPTE IDAMS <publication> (_source/SMPTE/Journal Article Repository/2019/7261654/8700645/08700635.xml) via idamsIngest.js",
        "source": "parsed",
        "updated": "2026-10-07T17:09:33.718Z",
        "version": "smpte-idams-publication@v1"
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      "year": "2019",
      "year$meta": {
        "confidence": "high",
        "note": "Ingested from SMPTE IDAMS <publication> (_source/SMPTE/Journal Article Repository/2019/7261654/8700645/08700635.xml) via idamsIngest.js",
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      "version": "smpte-idams-publication@v1"
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    "docId": "10.5594-JMI.2019.2899713",
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      "note": "Ingested from SMPTE IDAMS <publication> (_source/SMPTE/Journal Article Repository/2019/7261654/8700645/08700635.xml) via idamsIngest.js",
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      "version": "smpte-idams-publication@v1"
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    "docLabel": "SMPTE Motion Imaging Journal ( Volume: 128, Issue: 4, May 2019)",
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      "confidence": "high",
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      "source": "parsed",
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      "version": "smpte-idams-publication@v1"
    },
    "docTitle": "Nonblocking Multicast Networks for Transporting Stream Media",
    "docTitle$meta": {
      "confidence": "high",
      "note": "Ingested from SMPTE IDAMS <publication> (_source/SMPTE/Journal Article Repository/2019/7261654/8700645/08700635.xml) via idamsIngest.js",
      "source": "parsed",
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      "version": "smpte-idams-publication@v1"
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    "docType": "Journal Article",
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    "doi": "10.5594/JMI.2019.2899713",
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      "version": "smpte-idams-publication@v1"
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    "href": "https://doi.org/10.5594/JMI.2019.2899713",
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    "issn": {
      "electronic": "2160-2492",
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        "confidence": "high",
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        "version": "smpte-idams-publication@v1"
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      "print": "1545-0279",
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    "journalAcronym": "MIJR",
    "journalAcronym$meta": {
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    "journalTitle": "SMPTE Motion Imaging Journal",
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    "keywords": [
      "Ethernet Switch",
      "IP Multicast Switch",
      "Media Transport",
      "Multicast Switching",
      "Rearrangeable Nonblocking (RNB)",
      "Three-stage Clos Network",
      "Wide-sense Nonblocking (WSNB)"
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    "number": "4",
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    "pages": "1–9",
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    "publicationDate": "2019-05-01",
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        "note": "References parsed from the published PDF (Journal Article Repository/2019/7261654/8700645/08700635.pdf). SMPTE's library delivery has no reference file or full text for this paper (src/main/reports/smpte-upstream/referenceFilesTruthTable.md). Cross-check: Crossref lists 11 reference(s) for this DOI; 11 parsed from the PDF.",
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