{
  "schema": "https://streamingbusinessreview.com/v1/schema/entity.json",
  "license": "CC BY 4.0",
  "slug": "l4s",
  "type": "term",
  "name_jp": "L4S",
  "name_en": "L4S (Low Latency, Low Loss, Scalable Throughput)",
  "aliases": [
    "L4S",
    "Low Latency Low Loss Scalable Throughput"
  ],
  "also_known_as": [
    "RFC 9330 / 9331 / 9332",
    "Low Latency, Low Loss, and Scalable Throughput"
  ],
  "website": "https://datatracker.ietf.org/doc/rfc9330/",
  "summary": "Low Latency, Low Loss, and Scalable Throughput の略。IETF が策定したインターネットの低遅延ネットワークの枠組み (RFC 9330/9331/9332、標準化トラックではなく Informational/Experimental)。ネットワークが混雑し始めた段階を早期にシグナルすることで、バッファ膨張による遅延 (バッファブロート) を抑えながら高スループットを維持する。大規模ライブ配信の低遅延化を支える基盤技術。",
  "profile": {
    "founded_year": 2023,
    "founded_note": "2023 年 IETF が RFC 9330/9331/9332 として策定 (Informational/Experimental)"
  },
  "kpis": [
    {
      "label": "策定主体",
      "value": "IETF (RFC 9330/9331/9332)",
      "delta_dir": "neu"
    },
    {
      "label": "主な効果",
      "value": "低遅延・低損失の両立",
      "delta_dir": "neu"
    },
    {
      "label": "前提条件",
      "value": "配信/経路/端末の対応",
      "delta_dir": "neu"
    }
  ],
  "sparkline": null,
  "geographic": {
    "coverage": "標準仕様 (グローバル)。通信網・端末への実装が普及の鍵",
    "notes": "マルチ CDN と組み合わせ、大規模ライブ配信の同時接続スケーリングの標準構成に"
  },
  "mentions_count": 1,
  "co_occurrences": [
    {
      "slug": "dazn",
      "count": 1
    },
    {
      "slug": "netflix-inc",
      "count": 1
    }
  ],
  "mentions": [
    {
      "slug": "live-streaming-low-latency-scaling",
      "title_jp": "ライブ配信の低遅延化はなぜ投資されるのか — LL-HLS とマルチ CDN が標準、L4S は次の一手",
      "title_en": "Why Live Streaming Invests in Low Latency — LL-HLS and Multi-CDN Are the Baseline, L4S the Next Step",
      "category": "tech",
      "published_at": "2026-05-21T00:00:00.000Z",
      "url": "https://streamingbusinessreview.com/articles/live-streaming-low-latency-scaling/"
    }
  ],
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}