init

2026-06-25 11:46:39 +09:00
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+  <text x="600" y="32" text-anchor="middle" font-size="20" font-weight="700" fill="#102a43">2-Tier 프로토콜 아키텍처 (핵심 제안)</text>
+  <text x="600" y="55" text-anchor="middle" font-size="13" fill="#486581">T1↔T2: gRPC/QUIC (백본) · T2↔T3: MQTT/CoAP/C-V2X (현장 최적) · T2 게이트웨이 변환</text>
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+  <text x="90" y="115" font-size="15" font-weight="700" fill="#0d47a1">T1 — Cloud / On-Premises Servers</text>
+  <text x="90" y="138" font-size="12" fill="#102a43">LLM·분석·중앙 PM·예지정비 에이전트</text>
+  <text x="90" y="158" font-size="12" fill="#102a43">k8s · Istio Service Mesh · OTel Collector · BSR (Buf Schema Registry)</text>
+  <text x="90" y="180" font-size="12" font-weight="600" fill="#0d47a1">전송: gRPC Unary / Server Streaming / Bidi Streaming</text>
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+  <text x="600" y="240" text-anchor="middle" font-size="14" font-weight="700" fill="#0d47a1">T1 ↔ T2 Communication Channel</text>
+  <text x="600" y="265" text-anchor="middle" font-size="12" fill="#102a43">gRPC over HTTP/2 + QUIC (mobile/V2X handover) · mTLS · Server/Bidi Streaming · W3C traceparent</text>
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+  <text x="90" y="358" font-size="12" fill="#102a43">Jetson · RK3588 · 산업용 PC · 5G MEC (V2X용)</text>
+  <text x="90" y="378" font-size="12" font-weight="600" fill="#006064">6대 책임:</text>
+  <g font-size="11" fill="#102a43">
+    <text x="100" y="398">① 프로토콜 변환 (MQTT topic ↔ gRPC method, JSON↔Protobuf transcoding)</text>
+    <text x="100" y="416">② T3 fan-in 배치·버퍼링 (Stream Aggregation)</text>
+    <text x="100" y="434">③ Resume Token 발급 (단절-재접속 이어받기)</text>
+    <text x="100" y="452">④ 디바이스 인증 중계 (T3 SVID 검증 → T1 mTLS)</text>
+    <text x="700" y="398">⑤ Trace fan-out (T3 segment를 T1 OTel로 전파)</text>
+    <text x="700" y="416">⑥ 메트릭·관측 (Prometheus exporter → OTel Collector)</text>
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+    <text x="207" y="25" text-anchor="middle" font-size="10" fill="#00838f">5G MEC</text>
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+  <text x="600" y="500" text-anchor="middle" font-size="14" font-weight="700" fill="#bf360c">T2 ↔ T3 Communication Channel (tier-최적 혼합)</text>
+  <text x="600" y="525" text-anchor="middle" font-size="12" fill="#102a43">MQTT 5.0 (low-power MCU) · CoAP (constrained) · gRPC-Lite/nanopb (고성능 임베디드) · C-V2X (차량) · BLE (웨어러블)</text>
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+  <g font-size="11" fill="#102a43">
+    <text x="100" y="618"><tspan font-weight="600">저전력 MCU (LoRa/Wi-SUN):</tspan> MQTT 5.0 (Pub/Sub, QoS 0/1/2, Last Will) — 빌딩 센서·PV 인버터</text>
+    <text x="100" y="638"><tspan font-weight="600">제약 디바이스 (6LoWPAN):</tspan> CoAP (Confirmable, Observe) — 진동·환경 센서</text>
+    <text x="100" y="658"><tspan font-weight="600">고성능 임베디드 (리눅스):</tspan> gRPC-Lite (nanopb) — AGV·협동로봇·CCTV</text>
+    <text x="100" y="678"><tspan font-weight="600">차량 (5G/C-V2X):</tspan> C-V2X/ITS-G5 (CAM/DENM) — 10ms 안전 메시지</text>
+    <text x="100" y="698"><tspan font-weight="600">웨어러블/헬스:</tspan> BLE (duty cycle 1%) + MQTT — 배터리 1개월</text>
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+    <text x="207" y="62" text-anchor="middle" font-size="9" fill="#e65100">Wearable</text>
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+  <!-- Annotation: gRPC active scope -->
+  <text x="600" y="755" text-anchor="middle" font-size="11" font-style="italic" fill="#486581">gRPC의 활성 영역: T1↔T2 백본, T2↔T2 엣지-로컬 합의, T1→T2 모델 Streaming · T2→T3 일부(고성능 임베디드) — 나머지 T3는 tier-최적 프로토콜 혼용</text>
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