{"id":1232,"date":"2022-05-06T12:11:05","date_gmt":"2022-05-06T04:11:05","guid":{"rendered":"http:\/\/www.xzclass.com\/?p=1232"},"modified":"2022-05-07T10:31:11","modified_gmt":"2022-05-07T02:31:11","slug":"%e6%b6%a8%e7%9f%a5%e8%af%86%e4%ba%86%ef%bc%81wi-fi%e8%83%8c%e5%90%8e%e7%9a%84%e5%8e%9f%e7%90%86%e6%8f%ad%e7%a7%98%ef%bc%81","status":"publish","type":"post","link":"http:\/\/www.xzclass.com\/?p=1232","title":{"rendered":"\u6da8\u77e5\u8bc6\u4e86\uff01Wi-Fi\u80cc\u540e\u7684\u539f\u7406\u63ed\u79d8\uff01"},"content":{"rendered":"
Wi-Fi\u548c4G\/5G\u8702\u7a9d\u7f51\u7edc\uff0c\u662f\u6211\u4eec\u4e0a\u7f51\u65f6\u6700\u5e38\u7528\u7684\u4e24\u79cd\u63a5\u5165\u65b9\u5f0f\u3002<\/span><\/section>\n

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\u8fd9\u4e24\u79cd\u63a5\u5165\u65b9\u5f0f<\/span>\uff0c\u5e73\u65f6\u5728\u4e0a\u7f51\u65f6\u4f3c\u4e4e\u6ca1\u611f\u89c9\u5230\u6709\u4ec0\u4e48\u533a\u522b\u3002\u7136\u800c\uff0c\u5b83\u4eec\u5374\u662f\u5b8c\u5168\u4e0d\u540c\u7684\u8bbe\u8ba1\u54f2\u5b66<\/strong>\u3002<\/span>
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Wi-Fi<\/span>\u5728\u8bbe\u8ba1\u65f6\uff0c\u5c06AP\u63a5\u5165\u70b9\uff08\u8fd9\u91ccAP\u7684\u529f\u80fd\u7b49\u540c\u4e8e5G\u4e2d\u7684\u57fa\u7ad9\uff09\u548c\u7528\u6237\u7ec8\u7aef\u653e\u5728\u540c\u7b49\u7684\u4f4d\u7f6e\u8003\u8651\u3002\u57fa\u4e8e802.11\u534f\u8bae\u7684AP\u548c\u7ec8\u7aef\uff0c\u91c7\u7528\u4e86\u8f7d\u6ce2\u4fa6\u542c\u591a\u8def\u8bbf\u95ee\/\u78b0\u649e\u907f\u514d\uff08CSMA\/CA\uff09\u7684\u65b9\u5f0f\uff0c\u6765\u5e73\u7b49\u7ade\u4e89\u5360\u7528\u65e0\u7ebf\u4fe1\u9053\u3002<\/span><\/section>\n

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AP\u548c\u7ec8\u7aef\u3001\u7ec8\u7aef\u4e0e\u7ec8\u7aef\u4e4b\u95f4\uff0c\u5728\u63a5\u5165\u7f51\u7edc\u65f6\u5148\u8fdb\u884c\u65e0\u7ebf\u4fe1\u9053\u4fa6\u542c\u3002\u5728\u786e\u4fdd\u4fe1\u9053\u6ca1\u88ab\u5360\u7528\u7684\u60c5\u51b5\u4e0b\uff0c\u63a5\u5165\u7f51\u7edc\u3002\u8bbe\u5907\u4e4b\u95f4\u5e76\u4e0d\u5206\u5c42\u7ea7\uff0c\u800c\u662f\u91c7\u7528\u81ea\u534f\u8c03\u7ade\u4e89\u63a5\u5165\u7684\u6a21\u5f0f\uff0c\u8bbf\u95ee\u7f51\u7edc\u3002<\/span><\/section>\n

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\u4e24\u79cd\u65b9\u6848\u90fd\u80fd\u8ba9\u4fe1\u9053\u5f97\u5230\u5145\u5206\u7684\u5229\u7528\u3002\u53c2\u8003Aruba Networks\u53d1\u5e03\u7684\u6d4b\u8bd5\u7ed3\u679c\u53ef\u4ee5\u770b\u51fa\uff0cLTE\u548cWi-Fi 6\u5728MAC\u5c42\u9762\u7684\u9891\u8c31\u4f7f\u7528\u6548\u7387\u975e\u5e38\u63a5\u8fd1\uff0c\u5355\u6d41\u3001256QAM\u7684\u60c5\u51b5\u4e0b\uff0c\u90fd\u80fd\u52305bps\/Hz\u4ee5\u4e0a\u7684\u9891\u8c31\u4f7f\u7528\u6548\u7387\u3002<\/span><\/section>\n
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\u56fe 1 LTE\u4e0eWi-Fi\u5728\u9891\u8c31\u4f7f\u7528\u6548\u7387\u4e0a\u7684\u5bf9\u6bd4\uff08\u52d8\u8bef\uff1a\u56fe\u4e2dMbps\u5e94\u4e3abps\uff09<\/span><\/section>\n
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\u56fe 2 \u624b\u673a\u8fdb\u884c\u4e3b\u52a8\u626b\u63a2\u9488\u641c\u5bfb\u4fe1\u9053\u8fc7\u7a0b<\/span><\/section>\n
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\u5982\u679c\u6bcf\u6b21\u7ec8\u7aef\u5207\u6362AP\u65f6\uff0c\u90fd\u91cd\u65b0\u505a\u4e0a\u8ff0\u7684\u4e3b\u52a8\u63a2\u9488\u641c\u5bfb\u4fe1\u9053\u8fc7\u7a0b\uff0c\u5c06\u662f\u4f1a\u975e\u5e38\u4f4e\u6548\u7684\u3002\u597d\u5728802.11\u5de5\u4f5c\u7ec4\u8003\u8651\u5230\u4e86\u5c0f\u533a\u5207\u6362\u7684\u95ee\u9898\uff0c\u5728802.11k\u4e2d\u5f00\u53d1\u4e86\u201c\u90bb\u5c45\u62a5\u544a\u201d<\/strong>\u7684\u534f\u8bae\u3002<\/span><\/section>\n

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\u8bbe\u5907\u5728\u63a5\u5165AP\u540e\uff0c\u8be5AP\u4f1a\u5c06\u5176\u9644\u8fd1AP\u7684BSSID\u548c\u9891\u9053\u4fe1\u606f\u53d1\u9001\u7ed9\u7528\u6237\u3002\u8fd9\u6837\u4e00\u6765\uff0c\u7528\u6237\u5728\u9700\u8981\u5207\u6362\u5230\u53e6\u4e00\u4e2aAP\u65f6\uff0c\u5c31\u4e0d\u7528\u518d\u626b\u63cf\u4e00\u904d\u9891\u9053\u4e86\u3002<\/span><\/section>\n

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\u8fd9\u6837\u505a\u7684\u597d\u5904\uff0c\u4e00\u6765\u662f\u6781\u5927\u8282\u7701\u4e86\u5207\u6362\u65f6\u95f4\uff0c\u4fdd\u8bc1\u901a\u4fe1\u4e0d\u51fa\u73b0\u4e2d\u65ad\u3002\u4e8c\u6765\u662f\u7ed9\u7528\u6237\u8bbe\u5907\u7701\u7535\uff0c\u8bbe\u5907\u4e0d\u518d\u9700\u8981\u53d1\u9001\u4e00\u4e2a\u4e2a\u63a2\u9488\u3002\u7b2c\u4e09\uff0c\u5c31\u662f\u65e0\u7ebf\u4fe1\u9053\u4e5f\u5f97\u5230\u4e86\u66f4\u52a0\u6709\u6548\u7684\u5229\u7528\uff0cAP\u4e0d\u9700\u8981\u9891\u7e41\u5360\u7528\u65e0\u7ebf\u4fe1\u9053\u6765\u4e0d\u65ad\u56de\u5e94\u7ec8\u7aef\u7684\u8bf7\u6c42\u3002<\/span><\/section>\n
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\u56fe 3 AP\u901a\u8fc7802.11k\u534f\u8bae\u56de\u5e94\u7ec8\u7aef\u8bbe\u5907\u5176\u90bb\u8fd1AP\u7684\u4fe1\u606f<\/span><\/section>\n
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\u2588 <\/strong><\/span>\u81ea\u6211\u534f\u8c03\uff0c\u4fe1\u9053\u7ade\u4e89\u63a5\u5165\uff0c\u907f\u514d\u51b2\u7a81<\/strong><\/section>\n
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\u63a5\u5165\u7f51\u7edc\u540e\uff0cAP\u548c\u7ec8\u7aef\u4eec\u4fbf\u5f00\u59cb\u7ade\u4e89\u65e0\u7ebf\u4fe1\u9053\u7684\u4f7f\u7528\u3002<\/span><\/section>\n

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\u5728Wi-Fi\u7cfb\u7edf\u4e2d\uff0c\u7ec8\u7aef\u548cAP\u7684\u7a7a\u53e3\u65f6\u95f4\u7edf\u4e00\u88ab\u5206\u4e3a\u7a7a\u95f2\uff08Idle\uff09\u548c\u673a\u4f1a\u53d1\u9001\uff08TXOP\uff09\u65f6\u6bb5\u3002\u6ca1\u6709\u6570\u636e\u65f6\uff0c\u8bbe\u5907\u5c5e\u4e8e\u7a7a\u95f2\u671f\uff0c\u4e0d\u4f1a\u53d1\u9001\u4efb\u4f55\u4fe1\u606f\u3002<\/span><\/section>\n

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\u5f53\u8bbe\u5907\u6536\u5230\u6570\u636e\u53d1\u9001\u8bf7\u6c42\u65f6\uff0c\u8bbe\u5907\u5f00\u59cb\u8fdb\u5165\u4e89\u593a\u65e0\u7ebf\u4fe1\u9053\u7684\u201c\u4ef2\u88c1\u201d\uff08Arbitration\uff09\u8fc7\u7a0b\u3002\u6ca1\u6709\u4e2d\u592e\u8c03\u5ea6\u5668\uff0c\u6240\u6709\u8bbe\u5907\u6309\u7167\u6570\u636e\u4f18\u5148\u7ea7\u91c7\u7528\u201c\u516c\u5e73\u7ade\u4e89\u201d\u6a21\u5f0f\u6765\u8d62\u5f97\u4fe1\u9053\u4ef2\u88c1\u3002\u8d62\u5f97\u4fe1\u9053\u7684\u8bbe\u5907\uff0c\u5c06\u4f1a\u5f97\u52306ms\u7684\u673a\u4f1a\u53d1\u9001\u7a97\uff0c\u7136\u540e\u8fdb\u5165\u4e0b\u4e00\u4e2a\u4ef2\u88c1\u671f\u3002<\/span><\/section>\n
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\u56fe 4 802.11\u4e2d\u7684\u7a7a\u53e3\u65f6\u95f4\u5206\u914d<\/span><\/section>\n
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\u8fdb\u5165\u4ef2\u88c1\u8fc7\u7a0b\u7684Wi-Fi\u8bbe\u5907\uff0c\u9996\u5148\u5f00\u542f\u4fe1\u9053\u4fa6\u542c\u6a21\u5f0f\uff0cRF\u63a5\u6536\u673a\u5bf9\u65e0\u7ebf\u4fe1\u9053\u4e2d\u7684802.11\u4fe1\u53f7\u8fdb\u884c\u76d1\u6d4b\uff08Signal Detection\uff09\u3002\u5982\u679c\u4fa6\u542c\u5230\u7684\u4fe1\u53f7\u5f3a\u5ea6\u4f4e\u4e8e\u5176SD\u9608\u503c\uff08\u4ee5\u4e0b\u56fe\u601d\u79d1\u7684\u65b9\u6848\u4e3a\u4f8b\uff0c\u9608\u503c\u4e3a-82dBm\uff09\u65f6\uff0c\u8bbe\u5907\u5224\u5b9a\u76ee\u524d\u4fe1\u9053\u6ca1\u6709\u5176\u4ed6Wi-Fi\u8bbe\u5907\u5728\u4f7f\u7528\u3002<\/span><\/section>\n

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\u7531\u4e8eWi-Fi\u4f7f\u7528\u7684\u9891\u6bb5\u5c5e\u4e8e\u514d\u6388\u6743\u9891\u6bb5\uff0c\u9700\u8981\u4e0e\u975e802.11\u8bbe\u5907\u5171\u4eab\u4f7f\u7528\uff0c\u6bd4\u5982\u84dd\u7259\uff0c\u9065\u63a7\u5668\uff0c\u5fae\u6ce2\u7089\u7b49\u7b49\u3002\u90a3\u4e48\uff0c\u5728\u5224\u65ad\u4fe1\u9053\u5360\u7528\u60c5\u51b5\u65f6\uff0c\u4e0d\u4ec5\u4ec5\u9700\u8981\u80fd\u5bf9\u81ea\u8eab802.11\u534f\u8bae\u7684\u4fe1\u53f7\u8fdb\u884c\u76d1\u6d4b\uff0c\u8fd8\u9700\u8981\u5bf9\u4e0d\u660e\u901a\u4fe1\u534f\u8bae\u7684\u529f\u7387\u8fdb\u884c\u68c0\u6d4b\u3002<\/span><\/section>\n

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\u8fd9\u91cc\u5c31\u5f15\u51fa\u4e86\u7b2c\u4e8c\u4e2a\u68c0\u6d4b\u673a\u5236\u2014\u2014\u80fd\u91cf\u68c0\u6d4b\uff08Energy Detection\uff09<\/strong>\u3002<\/span><\/section>\n

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ED\u7684\u4f5c\u7528\uff0c\u662f\u5224\u65ad\u65e0\u7ebf\u4fe1\u9053\u6ca1\u6709\u88ab\u5176\u4ed6\u975eWi-Fi\u8bbe\u5907\u5360\u7528\uff0c\u9632\u6b62\u53d1\u9001\u7684\u6709\u7528Wi-Fi\u4fe1\u53f7\u88ab\u6df9\u6ca1\u5728\u566a\u58f0\u4e2d\uff0c\u901a\u5e38ED\u7684\u95e8\u9650\u6bd4SD\u9ad820dB\u3002<\/span><\/section>\n

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\u56fe 5 \u601d\u79d1\u65e0\u7ebf\u8bbe\u5907\u7684SD\uff0cED\u8bbe\u5b9a<\/span><\/section>\n
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\u7ec6\u5fc3\u7684\u7528\u6237\u53ef\u80fd\u4f1a\u53d1\u73b0\uff0c\u5728\u7f51\u7edc\u73af\u5883\u4e0d\u597d\u7684\u60c5\u51b5\u4e0b\uff0c\u89c6\u9891\u901a\u8bdd\u65f6\u7ecf\u5e38\u6709\u80fd\u542c\u5230\u58f0\u97f3\u4f46\u56fe\u50cf\u88ab\u5361\u4f4f\u7684\u73b0\u8c61\u3002\u8fd9\u5176\u5b9e\u662fWi-Fi\u7684\u4e00\u79cd\u53d1\u9001\u4f18\u5316\u63aa\u65bd\uff0c\u7528\u4e8e\u4fdd\u969c\u6700\u57fa\u672c\u7684\u670d\u52a1\u3002<\/span><\/section>\n

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Wi-Fi\u5c06\u6570\u636e\u5206\u4e3a\u56db\u79cd\u4e0d\u540c\u7684\u4f18\u5148\u7ea7\uff0c\u4ece\u4e0a\u5230\u4e0b\u5206\u522b\u4e3a\u8bed\u97f3\uff08VO\uff09\uff0c\u89c6\u9891\uff08VI\uff09\uff0c\u6700\u5927\u52aa\u529b\uff08BE\uff09\u548c\u80cc\u666f\uff08BK\uff09\u3002<\/span><\/strong>\u6bcf\u4e00\u4e2a\u7ea7\u522b\uff0c\u90fd\u4f1a\u9644\u4e0a\u4e0d\u540c\u7684AIFS\u503c\u3002AIFS\u503c\u8d8a\u4f4e\uff0c\u53d1\u9001\u4f18\u5148\u7ea7\u8d8a\u9ad8\u3002<\/span><\/section>\n

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<\/span>\u5728AIFS\u65f6\u95f4\u7ed3\u675f\u4e4b\u540e\uff0c\u8bbe\u5907\u4fbf\u8fdb\u5165<\/span>\u4e86\u7ade\u4e89\u7a97\u53e3\uff08CW\uff09\uff0c\u8bbe\u5907\u5f00\u59cb\u4fa6\u542c\u65e0\u7ebf\u4fe1\u9053\uff0c\u540c\u65f6\u5f00\u59cb\u5012\u8ba1\u65f6\u51c6\u5907\u53d1\u9001\u3002<\/span><\/section>\n
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\u5f53CW\u5012\u8ba1\u65f6\u7ed3\u675f\u65f6\uff0c\u5982\u679c\u8bbe\u5907\u53d1\u73b0\u4fe1\u9053\u6b63\u5728\u5360\u7528\uff0c\u8bbe\u5907\u4fbf\u81ea\u52a8\u8fdb\u5165\u4e0b\u4e00\u4e2a\u4ef2\u88c1\u671f\u3002\u5982\u679c\u8bbe\u5907\u53d1\u73b0\u4fe1\u9053\u5904\u4e8e\u7a7a\u95f2\u72b6\u6001\uff0c\u4fbf\u5f00\u59cb\u5360\u7528\u4fe1\u9053\uff0c\u53d1\u9001\u6570\u636e\u3002<\/span><\/section>\n

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<\/span>\u4e0b\u56fe\u8fd9\u4e2a\u4f8b\u5b50\uff0c\u5728\u7b2c\u4e00\u4e2a\u4ef2\u88c1\u671f\u4e2d\uff0cIPad\u7684CW\u65f6\u95f4\u6700\u77ed\uff0c\u7ade\u4e89\u4fe1\u9053\u6210\u529f\uff0c\u83b7\u5f97\u4e86\u53d1\u9001\u6743\u3002<\/span>\u5728IPad\u6570\u636e\u53d1\u9001\u540e\uff0c\u4e00\u8f6e\u65b0\u7684\u4ef2\u88c1\u5f00\u59cb\uff0c\u624b\u673a\u5728CW\u7ed3\u675f\u540e\uff0c\u53d1\u73b0\u4fe1\u9053\u6ca1\u6709\u88ab\u5360\u7528\uff0c\u83b7\u5f97\u4e86\u53d1\u9001\u6743\u3002<\/span>\u6700\u7ec8\uff0c\u65e0\u7ebfAP\u8d62\u5f97\u4e86\u7b2c\u4e09\u8f6e\u4ef2\u88c1\uff0c\u83b7\u5f97\u53d1\u9001\u6743\u3002<\/span><\/section>\n
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\u56fe 6 \u591a\u8bbe\u5907\u4fe1\u9053\u7ade\u4e89\u8fc7\u7a0b<\/span>
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\u8bfb\u5230\u8fd9\u91cc\uff0c\u4f60\u53ef\u80fd\u4f1a\u53d1\u73b0\uff0c\u8fd9\u4e2a\u7ade\u4e89\u8fc7\u7a0b\u5728\u8bbe\u5907\u589e\u591a\u7684\u60c5\u51b5\u4e0b\uff0c\u6548\u7387\u4f1a\u660e\u663e\u964d\u4f4e\uff0c\u6bcf\u4e2a\u8bbe\u5907\u7684\u7b49\u5f85\u53d1\u9001\u65f6\u95f4\u5c06\u4f1a\u53d8\u957f\u5f88\u591a\u3002<\/span><\/section>\n

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\u5b9e\u9645\u4f53\u9a8c\u4e2d\uff0c\u4f60\u53ef\u80fd\u4e5f\u6ce8\u610f\u5230\u4e86\uff0c\u5728Wi-Fi\u8bbe\u5907\u591a\u7684\u516c\u5171\u73af\u5883\uff0c\u6bd4\u5982\u5546\u573a\u3001\u5b66\u6821\u4e2d\uff0c\u7ecf\u5e38\u9700\u8981\u7b49\u5f85\u5f88\u957f\u65f6\u95f4\uff0c\u624d\u80fd\u53d1\u9001\u6216\u63a5\u6536\u6570\u636e\u3002<\/span><\/section>\n

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\u90a3\u4e48\uff0c\u5f88\u6709\u53ef\u80fd\u662f\u7f51\u7edc\u8fd8\u6ca1\u6709\u5347\u7ea7\u5230\u6700\u65b0\u7684Wi-Fi 6\u3002<\/span><\/section>\n

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Wi-Fi 6\u53ef\u4ee5\u8bf4\u662fWi-Fi\u884c\u4e1a\u8fc7\u53bb\u5341\u591a\u5e74\u4e2d\u6700\u5927\u7684\u4e00\u6b21\u9769\u65b0\u3002\u5177\u4f53Wi-Fi 6\u662f\u901a\u8fc7\u54ea\u4e9b\u65b0\u7279\u6027\u6765\u89e3\u51b3\u591a\u8bbe\u5907\u4e0b\u7f51\u7edc\u963b\u585e\u7684\u95ee\u9898\u5462\uff1f\u6211\u4f1a\u5728\u4e0b\u4e00\u671f\u7684\u6587\u7ae0\u4e2d\u7ed9\u5927\u5bb6\u4e00\u4e00\u9053\u6765\u3002<\/span><\/section>\n

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\uff08\u5168\u6587\u5b8c\uff09<\/span><\/span><\/section>\n

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\u672c\u6587\u4f5c\u8005\u5510\u6b23\u535a\u58eb\uff0c\u76ee\u524d\u62c5\u4efb<\/span>Spectrum Lab\u6280\u672f\u603b\u76d1\u3002<\/span><\/span><\/section>\n
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\u53c2\u8003\u6587\u732e<\/span><\/strong><\/span><\/section>\n
[1] Aruba Networks Blog \u2013 Understanding 802.11 medium contention.<\/span><\/section>\n
[2] Cisco White Paper- IEEE 802.11ax: The Sixth Generation of Wi-Fi.<\/span><\/section>\n
[3] Extreme Networks \u2013 The Road to AP discovery<\/span><\/section>\n
<\/section>\n
<\/section>\n","protected":false},"excerpt":{"rendered":"

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