{"id":91851,"date":"2024-04-23T12:02:25","date_gmt":"2024-04-23T04:02:25","guid":{"rendered":"https:\/\/www.techphant.cn\/?p=91851"},"modified":"2024-04-23T12:02:29","modified_gmt":"2024-04-23T04:02:29","slug":"pssmxd","status":"publish","type":"post","link":"https:\/\/www.techphant.cn\/blog\/91851.html","title":{"rendered":"PDCCH\u662f\u4ec0\u4e48\u4fe1\u9053"},"content":{"rendered":"\n

\u3000\u3000PDCCH(Physical Downlink Control Channel)<\/strong>\u662f\u7269\u7406\u4e0b\u884c\u63a7\u5236\u4fe1\u9053\uff0c\u5b83\u662f4G LTE(Long Term Evolution)\u65e0\u7ebf\u901a\u4fe1\u6807\u51c6\u4e2d\u7684\u4e00\u79cd\u7269\u7406\u4fe1\u9053\uff0c\u4e3b\u8981\u8d1f\u8d23\u5411\u7528\u6237\u8bbe\u5907(UE)\u4e0b\u53d1\u63a7\u5236\u4fe1\u606f\u3002\u8fd9\u4e9b\u63a7\u5236\u4fe1\u606f\u5305\u62ec\u4f46\u4e0d\u9650\u4e8e\u4f20\u8f93\u683c\u5f0f\u3001\u8d44\u6e90\u5206\u914d\u3001\u4e0a\u884c\u8c03\u5ea6\u8bb8\u53ef\u3001\u529f\u7387\u63a7\u5236\u4ee5\u53ca\u4e0a\u884c\u94fe\u8def\u7684\u63a7\u5236\u4fe1\u606f\u7b49\u3002PDCCH\u627f\u8f7d\u7684\u4fe1\u606f\u88ab\u79f0\u4e3aDCI(Downlink Control Information)\uff0c\u5b83\u5305\u542b\u4e86\u5bf9\u4e0b\u884c\u94fe\u8def\u8d44\u6e90\u7684\u8c03\u5ea6\u548c\u914d\u7f6e\u4fe1\u606f\u3002<\/p>\n\n\n\n

\u3000\u3000\u4e0e4G LTE\u76f8\u6bd4\uff0c5G NR\u4e2d\u7684PDCCH\u8bbe\u8ba1\u6709\u6240\u4e0d\u540c\uff0c\u4f8b\u5982\uff0cNR\u7684PDCCH\u7531\u4e8e\u5e26\u5bbd\u66f4\u5bbd\u3001\u914d\u7f6e\u66f4\u7075\u6d3b\uff0c\u56e0\u6b64\u5176\u7ed3\u6784\u548c\u5904\u7406\u8fc7\u7a0b\u4e5f\u66f4\u4e3a\u590d\u6742\u3002\u6b64\u5916\uff0c5G NR\u7684PDCCH\u8bbe\u8ba1\u8fd8\u5f15\u5165\u4e86\u4e00\u4e9b\u65b0\u7684\u7279\u6027\uff0c\u5982\u6539\u8fdb\u7684\u54c8\u5e0c\u51fd\u6570\uff0c\u4ee5\u63d0\u9ad8\u6027\u80fd\u5e76\u51cf\u5c11\u7528\u6237\u95f4\u7684\u5e72\u6270\u6982\u7387\u3002<\/p>\n\n\n\n

\u3000\u3000PDCCH\u662f\u4e00\u4e2a\u81f3\u5173\u91cd\u8981\u7684\u4fe1\u9053\uff0c\u5b83\u57284G LTE\u548c5G NR\u7f51\u7edc\u4e2d\u90fd\u626e\u6f14\u7740\u6838\u5fc3\u89d2\u8272\uff0c\u8d1f\u8d23\u627f\u8f7d\u4e0b\u884c\u63a7\u5236\u4fe1\u606f\uff0c\u6307\u5bfc\u7528\u6237\u8bbe\u5907\u5982\u4f55\u63a5\u6536\u548c\u5904\u7406\u4e0b\u884c\u94fe\u8def\u7684\u6570\u636e\u548c\u670d\u52a1\u3002<\/strong><\/p>\n\n\n\n

\u3000\u3000\u4e00\u3001 PDCCH\u57284G LTE\u548c5G NR\u4e2d\u7684\u5177\u4f53\u6280\u672f\u5dee\u5f02\u662f\u4ec0\u4e48?<\/h2>\n\n\n\n

\u3000\u3000PDCCH\u57284G LTE\u548c5G NR\u4e2d\u7684\u5177\u4f53\u6280\u672f\u5dee\u5f02\u4e3b\u8981\u4f53\u73b0\u5728\u4ee5\u4e0b\u51e0\u4e2a\u65b9\u9762\uff1a<\/p>\n\n\n\n

    \n
  • \u3000\u3000\u8bbe\u8ba1\u5143\u7d20\u7684\u7ec4\u5408\uff1a5G NR\u7684PDCCH\u4e0eLTE\u6216EPDCCH\u7684\u8bbe\u8ba1\u76f8\u6bd4\uff0c\u5177\u6709\u72ec\u7279\u7684\u8bbe\u8ba1\u5143\u7d20\u7ec4\u5408\uff0c\u8fd9\u4f7f\u5f97NR PDCCH\u5728\u67d0\u4e9b\u65b9\u9762\u4e0eLTE\u4e2d\u7684PDCCH\u6216EPDCCH\u6709\u6240\u4e0d\u540c\u3002<\/li>\n\n\n\n
  • \u3000\u3000\u5e26\u5bbd\u7075\u6d3b\u6027\uff1a5G NR\u5141\u8bb8PDCCH\u5728\u5e26\u5bbd\u914d\u7f6e\u4e0a\u66f4\u52a0\u7075\u6d3b\uff0c\u8fd9\u610f\u5473\u7740PDCCH\u80fd\u591f\u6709\u6548\u5730\u9002\u5e94\u4e0d\u540c\u7684\u5e26\u5bbd\u914d\u7f6e\u3002\u8fd9\u79cd\u7075\u6d3b\u6027\u662f\u901a\u8fc7\u6539\u8fdb\u7684\u7f16\u7801\u65b9\u6848\u548c\u8c03\u5236\u6280\u672f\u5b9e\u73b0\u7684\uff0c\u4ece\u800c\u63d0\u9ad8\u4e86PDCCH\u4f20\u8f93\u7684\u6548\u7387\uff0c\u51cf\u5c11\u4e86\u5f00\u9500\u5e76\u589e\u52a0\u4e86\u541e\u5410\u91cf\u3002<\/li>\n\n\n\n
  • \u3000\u3000\u63a7\u5236\u4fe1\u9053\u7684\u7b80\u5316\uff1a\u4e0eLTE\u4e2d\u5305\u62ecPCFICH\u3001PHICH\u548cPDCCH\u5728\u5185\u7684\u591a\u4e2a\u63a7\u5236\u4fe1\u9053\u4e0d\u540c\uff0c5G NR\u4e2d\u7684\u63a7\u5236\u4fe1\u9053\u4ec5\u5305\u62ecPDCCH(Physical Downlink Control Channel)\uff0c\u8d1f\u8d23\u7269\u7406\u5c42\u7684\u5404\u79cd\u63a7\u5236\u4fe1\u606f\u4f20\u8f93\u3002<\/li>\n\n\n\n
  • \u3000\u3000\u53c2\u8003\u4fe1\u53f7(DMRS)\u7684\u53d8\u5316\uff1a\u57285G NR\u4e2d\uff0cPDCCH\u7684DMRS\u5206\u4e3a\u56db\u79cd\u7c7b\u578b(TYPE1. TYPE2. Enhanced Type1\u548cEnhanced Type2)\uff0c\u5b83\u4eec\u5206\u522b\u652f\u6301\u591a\u8fbe8. 12. 16\u548c24\u4e2a\u6b63\u4ea4\u7aef\u53e3\u3002\u8fd9\u79cd\u53d8\u5316\u63d0\u4f9b\u4e86\u66f4\u591a\u7684\u7075\u6d3b\u6027\u548c\u6539\u8fdb\u7684\u6027\u80fd\u3002<\/li>\n\n\n\n
  • \u3000\u3000\u6027\u80fd\u4f18\u52bf\uff1a\u901a\u8fc7\u5bf9PDCCH\u8bbe\u8ba1\u7684\u8003\u8651\uff0c5G NR\u65e8\u5728\u7ed3\u5408PDCCH\u548cEPDCCH\u7684\u4f18\u70b9\uff0c\u540c\u65f6\u51cf\u8f7b\u5b83\u4eec\u7684\u9650\u5236\u3002\u6a21\u62df\u7ed3\u679c\u663e\u793a\uff0cEPDCCH\u548cNR-PDCCH\u5c55\u73b0\u51fa\u660e\u663e\u7684\u6027\u80fd\u4f18\u52bf\u3002<\/li>\n\n\n\n
  • \u3000\u3000\u4e0b\u884c\u63a7\u5236\u4fe1\u606f(DCI)\u7684\u4f20\u8f93\uff1a\u57285G\u7cfb\u7edf\u4e2d\uff0cPDCCH\u901a\u8fc7\u4f20\u8f93\u4e0b\u884c\u63a7\u5236\u4fe1\u606f(DCI)\u6765\u63a7\u5236\u4e0a\u4e0b\u884c\u6570\u636e\u7684\u4f20\u8f93\u548c\u63a5\u6536\uff0c\u8fd9\u662f5G\u7cfb\u7edf\u7269\u7406\u4fe1\u9053\u63a7\u5236\u7684\u6838\u5fc3\u3002<\/li>\n<\/ul>\n\n\n\n

    \u3000\u3000PDCCH\u57284G LTE\u548c5G NR\u4e4b\u95f4\u7684\u6280\u672f\u5dee\u5f02\u4e3b\u8981\u4f53\u73b0\u5728\u8bbe\u8ba1\u5143\u7d20\u7684\u7ec4\u5408\u3001\u5e26\u5bbd\u7075\u6d3b\u6027\u3001\u63a7\u5236\u4fe1\u9053\u7684\u7b80\u5316\u3001\u53c2\u8003\u4fe1\u53f7\u7684\u53d8\u5316\u4ee5\u53ca\u6027\u80fd\u4f18\u52bf\u7b49\u65b9\u9762\u3002\u8fd9\u4e9b\u5dee\u5f02\u53cd\u6620\u4e865G NR\u5728\u63d0\u9ad8\u6548\u7387\u3001\u51cf\u5c11\u5f00\u9500\u548c\u589e\u52a0\u541e\u5410\u91cf\u65b9\u9762\u7684\u52aa\u529b\uff0c\u4ee5\u53ca\u5bf9\u73b0\u6709\u6280\u672f\u7684\u6539\u8fdb\u548c\u4f18\u5316\u3002<\/p>\n\n\n\n

    \u3000\u3000\u4e8c\u3001 5G NR\u4e2dPDCCH\u7684\u6539\u8fdb\u54c8\u5e0c\u51fd\u6570\u662f\u5982\u4f55\u5de5\u4f5c\u7684\uff0c\u4ee5\u53ca\u5b83\u5982\u4f55\u51cf\u5c11\u7528\u6237\u95f4\u7684\u5e72\u6270\u6982\u7387?<\/h2>\n\n\n\n

    \u3000\u3000\u57285G NR\u4e2d\uff0cPDCCH(\u7269\u7406\u4e0b\u884c\u63a7\u5236\u4fe1\u9053)\u7684\u6539\u8fdb\u54c8\u5e0c\u51fd\u6570\u4e3b\u8981\u7528\u4e8e\u786e\u5b9a\u8d44\u6e90\u6620\u5c04\u548c\u8c03\u5ea6\u4fe1\u606f\u7684\u4f4d\u7f6e\u3002\u5177\u4f53\u6765\u8bf4\uff0c\u54c8\u5e0c\u51fd\u6570\u7528\u4e8e\u8ba1\u7b97\u641c\u7d22\u7a7a\u95f4(Search Space)\uff0c\u8fd9\u662fPDCCH\u4fe1\u9053\u4e0a\u8fdb\u884c\u76f2\u68c0\u7684\u5173\u952e\u90e8\u5206\u3002\u641c\u7d22\u7a7a\u95f4\u7684\u5927\u5c0f\u76f4\u63a5\u5f71\u54cd\u5230PDCCH\u4fe1\u9053\u7684\u805a\u5408\u7b49\u7ea7(L)\uff0c\u4ee5\u53ca\u5982\u4f55\u5728\u7ed9\u5b9a\u7684\u5b50\u5e27\u4e2d\u6709\u6548\u5730\u5206\u914dCCE(\u63a7\u5236\u4fe1\u9053\u5143\u7d20)\u7d22\u5f15\u3002<\/p>\n\n\n\n

    \u3000\u3000\u54c8\u5e0c\u51fd\u6570\u901a\u8fc7\u5c06\u63a5\u6536\u5230\u7684\u4fe1\u606f\u6bd4\u7279\u8f6c\u6362\u4e3a\u4e00\u4e2a\u8f83\u5c0f\u7684\u641c\u7d22\u7a7a\u95f4\u5185\u7684\u4f4d\u7f6e\uff0c\u4ece\u800c\u51cf\u5c11\u4e86\u7528\u6237\u95f4\u7684\u5e72\u6270\u6982\u7387\u3002\u8fd9\u662f\u56e0\u4e3a\u8f83\u5c0f\u7684\u641c\u7d22\u7a7a\u95f4\u610f\u5473\u7740\u5728\u7ed9\u5b9a\u7684\u5b50\u5e27\u5185\uff0c\u53ef\u80fd\u7684\u51b2\u7a81(\u5373\u4e24\u4e2a\u7528\u6237\u5c1d\u8bd5\u5728\u540c\u4e00\u65f6\u95f4\u4f7f\u7528\u76f8\u540c\u7684\u8d44\u6e90)\u7684\u53ef\u80fd\u6027\u964d\u4f4e\u3002\u6b64\u5916\uff0c\u901a\u8fc7\u8c03\u6574\u641c\u7d22\u7a7a\u95f4\u7684\u5927\u5c0f\uff0c\u53ef\u4ee5\u8fdb\u4e00\u6b65\u7ec6\u5316\u8d44\u6e90\u5206\u914d\uff0c\u4f7f\u5f97\u6bcf\u4e2a\u7528\u6237\u7684\u4fe1\u53f7\u66f4\u52a0\u6e05\u6670\uff0c\u4ece\u800c\u964d\u4f4e\u4e86\u4fe1\u53f7\u4e0e\u5e72\u6270\u52a0\u566a\u58f0\u6bd4(SINR)\u3002<\/p>\n\n\n\n

    \u3000\u3000\u603b\u7ed3\u6765\u8bf4\uff0c5G NR\u4e2dPDCCH\u7684\u6539\u8fdb\u54c8\u5e0c\u51fd\u6570\u901a\u8fc7\u8ba1\u7b97\u641c\u7d22\u7a7a\u95f4\u6765\u786e\u5b9a\u8d44\u6e90\u6620\u5c04\u548c\u8c03\u5ea6\u4fe1\u606f\u7684\u4f4d\u7f6e\uff0c\u8fd9\u6709\u52a9\u4e8e\u51cf\u5c11\u7528\u6237\u95f4\u7684\u5e72\u6270\u6982\u7387\uff0c\u56e0\u4e3a\u5b83\u5141\u8bb8\u66f4\u7cbe\u7ec6\u7684\u8d44\u6e90\u5206\u914d\u548c\u66f4\u4f4e\u7684\u51b2\u7a81\u7387\u3002\u8fd9\u79cd\u65b9\u6cd5\u901a\u8fc7\u4f18\u5316\u8d44\u6e90\u5206\u914d\u548c\u51cf\u5c11\u4fe1\u53f7\u5e72\u6270\uff0c\u63d0\u9ad8\u4e86\u7cfb\u7edf\u7684\u6574\u4f53\u6027\u80fd\u548c\u7528\u6237\u4f53\u9a8c\u3002<\/p>\n\n\n\n

    \u3000\u3000\u4e09\u3001 PDCCH\u627f\u8f7d\u7684DCI(Downlink Control Information)\u5177\u4f53\u5305\u542b\u54ea\u4e9b\u7c7b\u578b\u7684\u4fe1\u606f?<\/h2>\n\n\n\n

    \u3000\u3000PDCCH(Physical Downlink Control Channel)\u627f\u8f7d\u7684DCI(Downlink Control Information)\u4fe1\u606f\u4e3b\u8981\u5305\u62ec\u4ee5\u4e0b\u51e0\u79cd\u7c7b\u578b\uff1a<\/p>\n\n\n\n

      \n
    • \u3000\u3000HARQ(Hybrid Automatic Repeat Request)\u4fe1\u606f\uff1a\u8fd9\u662f\u5173\u4e8e\u91cd\u4f20\u8bf7\u6c42\u7684\u4fe1\u606f\uff0c\u5305\u62ecHARQ ID\u548c\u53ef\u80fd\u7684\u53cd\u9988\u72b6\u6001\uff0c\u7528\u4e8e\u7ba1\u7406\u4e0a\u884c\u548c\u4e0b\u884c\u94fe\u8def\u4e2d\u7684\u81ea\u52a8\u91cd\u4f20\u3002<\/li>\n\n\n\n
    • \u3000\u3000\u529f\u7387\u63a7\u5236\u547d\u4ee4\uff1a\u8fd9\u4e9b\u547d\u4ee4\u6307\u5bfcUE\u5982\u4f55\u8c03\u6574\u5176\u53d1\u5c04\u529f\u7387\uff0c\u4ee5\u9002\u5e94\u7f51\u7edc\u73af\u5883\u548c\u907f\u514d\u5e72\u6270\u3002<\/li>\n\n\n\n
    • \u3000\u3000\u5176\u4ed6\u63a7\u5236\u4fe1\u606f\uff1a\u8fd9\u53ef\u80fd\u5305\u62ec\u7cfb\u7edf\u7ea7\u6216\u7528\u6237\u8bbe\u5907\u7279\u5b9a\u7684\u4fe1\u606f\uff0c\u5982\u8c03\u5ea6\u4fe1\u606f\u3001\u4fe1\u9053\u72b6\u6001\u4fe1\u606f\u7b49\u3002<\/li>\n\n\n\n
    • \u3000\u3000\u89e3\u8c03\u53c2\u8003\u4fe1\u53f7(DMRS)\uff1a\u8fd9\u662f\u4e3a\u4e86\u5e2e\u52a9UE\u6b63\u786e\u89e3\u7801\u4e0b\u884c\u4fe1\u53f7\u800c\u63d0\u4f9b\u7684\u53c2\u8003\u4fe1\u53f7\u4fe1\u606f\u3002<\/li>\n<\/ul>\n\n\n\n

      \u3000\u3000\u8fd9\u4e9b\u4fe1\u606f\u901a\u8fc7\u4e0d\u540c\u7684DCI\u683c\u5f0f\u6765\u7ec4\u7ec7\u548c\u4f20\u8f93\uff0c\u6bcf\u79cd\u683c\u5f0f\u90fd\u6709\u5176\u7279\u5b9a\u7684\u5e94\u7528\u573a\u666f\u548c\u529f\u80fd\u3002\u4f8b\u5982\uff0c\u67d0\u4e9b\u683c\u5f0f\u4e13\u95e8\u7528\u4e8e\u8c03\u5ea6PUSCH(Physical Uplink Shared Channel)\u3001PDSCH(Physical Downlink Shared Channel)\u3001TPC(Target Power Control)\u548cSFI(Sounding Reference Information)\u7b49\u3002<\/p>\n\n\n\n

      \u3000\u3000\u56db\u3001 \u57285G NR\u7f51\u7edc\u4e2d\uff0cPDCCH\u662f\u5982\u4f55\u5b9e\u73b0\u4e0b\u884c\u94fe\u8def\u8d44\u6e90\u7684\u9ad8\u6548\u8c03\u5ea6\u548c\u5206\u914d\u7684?<\/h2>\n\n\n\n

      \u3000\u3000\u57285G NR\u7f51\u7edc\u4e2d\uff0cPDCCH\u901a\u8fc7\u591a\u79cd\u65b9\u5f0f\u5b9e\u73b0\u4e0b\u884c\u94fe\u8def\u8d44\u6e90\u7684\u9ad8\u6548\u8c03\u5ea6\u548c\u5206\u914d\u3002\u9996\u5148\uff0cPDCCH\u8d1f\u8d23\u901a\u77e5\u7ec8\u7aef\u5728\u7279\u5b9a\u7684\u8d44\u6e90\u4e0a\u6536\u53d1\u6570\u636e\uff0c\u8fd9\u662f\u901a\u8fc7\u534a\u9759\u6001\u914d\u7f6e\u7684\u65b9\u5f0f\u8fdb\u884c\u7684\u3002\u5177\u4f53\u6765\u8bf4\uff0cCORESET(\u63a7\u5236\u8d44\u6e90\u96c6)\u901a\u8fc7RRC\u4fe1\u4ee4\u534a\u9759\u6001\u5730\u914d\u7f6e\u7ed9\u7ec8\u7aef\uff0c\u6307\u660e\u4e86PDCCH\u5360\u7528\u7684\u4e00\u4e2a\u65f6\u9891\u8d44\u6e90\u5757\u3002\u8fd9\u79cd\u914d\u7f6e\u65b9\u5f0f\u5141\u8bb8\u7f51\u7edc\u5728\u4e0d\u540c\u7684\u65f6\u95f4\u548c\u9891\u7387\u8d44\u6e90\u4e0a\u7075\u6d3b\u5730\u8c03\u5ea6\u4e0b\u884c\u94fe\u8def\u8d44\u6e90\u3002<\/p>\n\n\n\n

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