{"id":448,"date":"2025-12-22T17:20:51","date_gmt":"2025-12-22T09:20:51","guid":{"rendered":"https:\/\/www.garfield-blog.top\/?p=448"},"modified":"2025-12-23T11:01:10","modified_gmt":"2025-12-23T03:01:10","slug":"%e3%80%90%e8%af%bb%e4%b9%a6%e7%ac%94%e8%ae%b0%e3%80%91%e3%80%90%e6%97%a0%e7%ba%bf%e6%9d%83%e5%a8%81%e6%8c%87%e5%8d%97%e7%ac%ac%e4%ba%94%e7%89%88%e3%80%91802-11%e6%8e%a7%e5%88%b6%e5%b8%a7","status":"publish","type":"post","link":"https:\/\/www.garfield-blog.top\/?p=448","title":{"rendered":"\u3010\u8bfb\u4e66\u7b14\u8bb0\u3011\u3010\u65e0\u7ebf\u6743\u5a01\u6307\u5357\u7b2c\u4e94\u7248\u3011802.11\u63a7\u5236\u5e27"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">\u6982\u8ff0<\/h2>\n\n\n\n<p><code>802.11<\/code>\u63a7\u5236\u5e27\u534f\u52a9\u4f20\u8f93\u6570\u636e\u5e27\uff0c\u4ee5\u67d0\u4e2a\u57fa\u672c\u901f\u7387\u53d1\u9001\u3002\u63a7\u5236\u5e27\u7528\u4e8e\u6e05\u9664\u4fe1\u9053\u3001\u83b7\u53d6\u4fe1\u9053\u5e76\u63d0\u4f9b\u5355\u64ad\u5e27\u786e\u8ba4\u3002<strong>\u63a7\u5236\u5e27\u4ec5\u7531<code>MAC<\/code>\u5e27\u5934\u548c\u5e27\u5c3e\u6784\u6210\uff0c\u6ca1\u6709\u5e27\u4f53<\/strong>\u3002<code>MAC<\/code>\u5e27\u5934\u5305\u542b\u7684\u4fe1\u606f\u8db3\u4ee5\u5b8c\u6210\u8d4b\u4e88<code>802.11<\/code>\u63a7\u5236\u5e27\u7684\u4efb\u52a1\u3002<\/p>\n\n\n\n<p><code>802.11<\/code>\u5e27\u5728\u5e27\u5934\u7684\u7c7b\u578b\u548c\u5b50\u7c7b\u578b\u5b57\u6bb5\u5171\u540c\u5b9a\u4e49\u4e86\u4e00\u4e2a\u5e27<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u7c7b\u578b(Type)\u5b57\u6bb5<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u6bd4\u7279\u503c<\/th><th>\u5e27\u7c7b\u578b<\/th><th>\u4f5c\u7528<\/th><\/tr><\/thead><tbody><tr><td><code>00<\/code><\/td><td>\u7ba1\u7406\u5e27<\/td><td>\u53d1\u73b0\u63a5\u5165\u70b9\u5e76\u52a0\u5165\u57fa\u672c\u670d\u52a1\u96c6<\/td><\/tr><tr><td><code>01<\/code><\/td><td>\u63a7\u5236\u5e27<\/td><td>\u786e\u8ba4\u4f20\u8f93\u6210\u529f\u5e76\u4fdd\u7559\u65e0\u7ebf\u4ecb\u8d28<\/td><\/tr><tr><td><code>10<\/code><\/td><td>\u6570\u636e\u5e27<\/td><td>\u643a\u5e26\u4e0a\u5c42<code>MSDU<\/code>\u51c0\u8377<\/td><\/tr><tr><td><code>11<\/code><\/td><td>\u6269\u5c55\u5e27<\/td><td>\u4e00\u79cd\u65b0\u7684\u3001\u7075\u6d3b\u7684\u5e27\u683c\u5f0f<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">\u63a7\u5236\u5e27\u5b50\u7c7b\u578b(Subtype)\u5b57\u6bb5<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u6bd4\u7279\u503c<\/th><th>\u5e27\u7c7b\u578b<\/th><th>\u4f5c\u7528<\/th><\/tr><\/thead><tbody><tr><td><code>0000-0011<\/code><\/td><td><strong>\u4fdd\u7559<\/strong>(<code>Reserved<\/code>)<\/td><td>\u672a\u4f7f\u7528<\/td><\/tr><tr><td><code>0100<\/code><\/td><td><strong>\u6ce2\u675f\u6210\u5f62\u62a5\u544a\u8f6e\u8be2\u5e27<\/strong>(<code>Beamforming Report Poll<\/code>)<\/td><td>\u5728<code>802.11ac\/ax<\/code>\u4e2d\uff0c<code>AP<\/code>\u7528\u6b64\u5e27\u8bf7\u6c42\u5ba2\u6237\u7aef\u53d1\u9001\u5176\u6ce2\u675f\u6210\u5f62\u53cd\u9988(<code>CSI<\/code>)<\/td><\/tr><tr><td><code>0101<\/code><\/td><td><strong>VHT NDP\u516c\u544a\u5e27<\/strong>(<code>VHT NDP Announcement<\/code>)<\/td><td>\u7528\u4e8e\u9ad8\u541e\u5410\u91cf(<code>VHT, 802.11ac<\/code>)\u6ce2\u675f\u6210\u5f62\u8bad\u7ec3\uff0c\u901a\u77e5\u5373\u5c06\u53d1\u9001<code>NDP<\/code>(<code>Null Data Packet<\/code>)\u4ee5\u4f9b\u4fe1\u9053\u63a2\u6d4b<\/td><\/tr><tr><td><code>0110<\/code><\/td><td><strong>\u63a7\u5236\u5e27\u6269\u5c55\u5e27<\/strong>(<code>Control Frame Extension<\/code>)<\/td><td><code>802.11ax<\/code>\u5f15\u5165\uff0c\u7528\u4e8e\u643a\u5e26\u989d\u5916\u63a7\u5236\u4fe1\u606f(\u5982<code>HE-SIG<\/code>\u5b57\u6bb5\u6269\u5c55)\uff0c\u652f\u6301<code>OFDMA<\/code>\u548c<code>MU-MIMO<\/code>\u8c03\u5ea6<\/td><\/tr><tr><td><code>0111<\/code><\/td><td><strong>\u63a7\u5236\u5c01\u88c5\u5e27<\/strong>(<code>Control Wrapper<\/code>)<\/td><td>\u7528\u4e8e\u5c01\u88c5\u5176\u4ed6\u63a7\u5236\u4fe1\u606f(\u5982\u5728<code>802.11n\/ac<\/code>\u4e2d\u5c01\u88c5\u591a\u4e2a<code>BlockAckReq<\/code>\u7b49)\uff0c\u8f83\u5c11\u89c1<\/td><\/tr><tr><td><code>1000<\/code><\/td><td><strong>\u5757\u786e\u8ba4\u8bf7\u6c42\u5e27<\/strong>(<code>Block Ack Request<\/code>)<\/td><td>\u8bf7\u6c42\u63a5\u6536\u65b9\u5bf9\u4e00\u7ec4\u5df2\u63a5\u6536\u7684<code>MPDU<\/code>\u53d1\u9001<code>Block Ack<\/code>(\u6279\u91cf\u786e\u8ba4)\uff0c\u63d0\u9ad8\u6548\u7387<\/td><\/tr><tr><td><code>1001<\/code><\/td><td><strong>\u5757\u786e\u8ba4\u5e27<\/strong>(<code>Block Ack<\/code>)<\/td><td>\u5bf9\u63a5\u6536\u5230\u7684\u4e00\u7ec4\u6570\u636e\u5e27\u8fdb\u884c\u6279\u91cf<code>ACK<\/code>\uff0c\u51cf\u5c11<code>ACK<\/code>\u5f00\u9500(\u5e38\u7528\u4e8e\u9ad8\u541e\u5410\u573a\u666f)<\/td><\/tr><tr><td><code>1010<\/code><\/td><td><strong>\u7701\u7535\u8f6e\u8be2\u5e27<\/strong>(<code>PS-Poll<\/code>)<\/td><td>(<code>Power Save Poll<\/code>)\uff1a\u5904\u4e8e\u7701\u7535\u6a21\u5f0f\u7684<code>STA<\/code>\u7528\u6b64\u5e27\u5411<code>AP<\/code>\u8bf7\u6c42\u7f13\u5b58\u7684\u6570\u636e\u5e27<\/td><\/tr><tr><td><code>1011<\/code><\/td><td><strong>\u8bf7\u6c42\u53d1\u9001\u5e27<\/strong>(<code>RTS<\/code>)<\/td><td>(<code>Request To Send<\/code>)\uff1a\u7528\u4e8e<code>CSMA\/CA<\/code>\u7684\u63e1\u624b\u673a\u5236\uff0c\u9884\u7559\u4fe1\u9053(\u914d\u5408<code>CTS<\/code>\u4f7f\u7528)<\/td><\/tr><tr><td><code>1100<\/code><\/td><td><strong>\u6e05\u9664\u53d1\u9001\u5e27<\/strong>(<code>CTS<\/code>)<\/td><td>(<code>Clear To Send<\/code>)\uff1a\u54cd\u5e94<code>RTS<\/code>\uff0c\u544a\u77e5\u5176\u4ed6\u8bbe\u5907\u4fe1\u9053\u5df2\u88ab\u5360\u7528\uff0c\u540c\u65f6\u5141\u8bb8<code>RTS<\/code>\u53d1\u9001\u65b9\u5f00\u59cb\u4f20\u8f93<\/td><\/tr><tr><td><code>1101<\/code><\/td><td><strong>\u786e\u8ba4\u5e27<\/strong>(<code>Ack<\/code>)<\/td><td>\u5bf9\u5355\u4e2a\u6570\u636e\u5e27\u7684\u6210\u529f\u63a5\u6536\u8fdb\u884c\u786e\u8ba4(\u6700\u5e38\u7528\u7684\u63a7\u5236\u5e27\u4e4b\u4e00)<\/td><\/tr><tr><td><code>1110<\/code><\/td><td><strong>\u65e0\u7ade\u4e89\u7ed3\u675f\u5e27<\/strong>(<code>CF-End<\/code>)<\/td><td>(<code>Contention Free End<\/code>)\uff1a\u5728\u65e7\u5f0f<code>PCF<\/code>(\u70b9\u534f\u8c03\u529f\u80fd)\u6a21\u5f0f\u4e0b\uff0c\u6807\u8bb0\u65e0\u7ade\u4e89\u5468\u671f\u7ed3\u675f<\/td><\/tr><tr><td><code>1111<\/code><\/td><td><strong>\u65e0\u7ade\u4e89\u7ed3\u675f + \u786e\u8ba4\u5e27<\/strong>(<code>CF-End +CF-Ack<\/code>)<\/td><td>\u540c\u4e0a\uff0c\u4f46\u540c\u65f6\u786e\u8ba4\u524d\u4e00\u4e2a\u5e27(\u4ec5\u7528\u4e8e<code>PCF<\/code>\u6a21\u5f0f)<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">\u6ce2\u675f\u6210\u5f62\u62a5\u544a\u8f6e\u8be2\u5e27(Beamforming Report Poll)<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Beamforming Report Poll\u5e27\u4e3b\u4f53<\/h3>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u7b14\u8005\u6ce8\uff1aBeamforming Report Poll\u5e27<strong>\u8be6\u60c5\u89c1IEEE 802.11-2016\u6587\u68639.3.1.21<\/strong><\/p>\n<\/blockquote>\n\n\n\n<h3 class=\"wp-block-heading\">Beamforming Report Poll\u5e27\u7ed3\u6784<\/h3>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/www.garfield-blog.top\/wp-content\/uploads\/2025\/12\/Beamforming-Report-Poll.jpg'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1291\" height=\"203\" data-original=\"https:\/\/www.garfield-blog.top\/wp-content\/uploads\/2025\/12\/Beamforming-Report-Poll.jpg\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-450\"  sizes=\"auto, (max-width: 1291px) 100vw, 1291px\" \/><\/div><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Duration\u5b57\u6bb5\uff1a<\/strong>\u6309\u7167<code>IEEE 802.11-2016 9.2.5<\/code>\u8282\u4e2d\u7684\u89c4\u5b9a\u8fdb\u884c\u8bbe\u7f6e\u3002<\/li>\n\n\n\n<li><strong>RA\u5b57\u6bb5\uff1a<\/strong>\u8bbe\u7f6e\u4e3a\u9884\u671f\u63a5\u6536\u65b9\u7684\u5730\u5740<\/li>\n\n\n\n<li><strong>TA\u5b57\u6bb5\uff1a<\/strong>\u8bbe\u7f6e\u4e3a\u53d1\u9001\u6ce2\u675f\u6210\u5f62\u62a5\u544a\u8f6e\u8be2(<code>Beamforming Report Poll<\/code>)\u5e27\u7684<code>STA<\/code>\u7684\u5730\u5740\uff0c\u6216\u4e00\u4e2a\u5e26\u5bbd\u4fe1\u4ee4<code>TA<\/code>(\u4f20\u8f93\u5730\u5740)\u3002\u5f53<code>VHT STA<\/code>\u4ee5\u975e<code>HT<\/code>\u683c\u5f0f\u6216\u975e<code>HT<\/code>\u91cd\u590d\u683c\u5f0f\u53d1\u9001\u6ce2\u675f\u6210\u5f62\u62a5\u544a\u8f6e\u8be2\u5e27\uff0c\u5e76\u4e14\u52a0\u6270\u5e8f\u5217\u643a\u5e26\u4e86<code>TXVECTOR<\/code>\u53c2\u6570<code>CH_BANDWIDTH_IN_NON_HT<\/code>\u65f6\uff0c<code>TA<\/code>\u5b57\u6bb5\u5e94\u8bbe\u7f6e\u4e3a\u4e00\u4e2a\u5e26\u5bbd\u4fe1\u4ee4<code>TA<\/code><\/li>\n\n\n\n<li><strong>\u53cd\u9988\u6bb5\u91cd\u4f20\u4f4d\u56fe(Feedback Segment Retransmission Bitmap)\u5b57\u6bb5\uff1a<\/strong>\u7528\u4e8e\u6307\u793a\u6240\u8bf7\u6c42\u7684<code>VHT<\/code>\u538b\u7f29\u6ce2\u675f\u6210\u5f62\u62a5\u544a\u4e2d\u7684\u53cd\u9988\u6bb5\u3002\u5982\u679c\u8be5\u5b57\u6bb5\u4e2d\u7b2c<code>n<\/code>\u4f4d(<code>n=0<\/code>\u8868\u793a\u6700\u4f4e\u6709\u6548\u4f4d<code>LSB<\/code>\uff0c<code>n=7<\/code>\u8868\u793a\u6700\u9ad8\u6709\u6548\u4f4d<code>MSB<\/code>)\u4e3a<code>1<\/code>\uff0c\u5219\u8868\u793a\u8bf7\u6c42<code>VHT MIMO<\/code>\u63a7\u5236\u5b57\u6bb5\u4e2d\u201c\u5269\u4f59\u53cd\u9988\u6bb5\u201d(<code>Remaining Feedback Segments<\/code>)\u5b50\u5b57\u6bb5\u503c\u7b49\u4e8e<code>n<\/code>\u7684\u53cd\u9988\u6bb5\uff1b\u82e5\u7b2c<code>n<\/code>\u4f4d\u4e3a<code>0<\/code>\uff0c\u5219\u8868\u793a\u4e0d\u8bf7\u6c42\u8be5\u53cd\u9988\u6bb5<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">VHT NDP\u516c\u544a\u5e27(VHT NDP Announcement)<\/h2>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u7b14\u8005\u6ce8\uff1aVHT NDP Announcement<strong>\u8be6\u60c5\u89c1IEEE 802.11-2016\u6587\u68639.3.1.20<\/strong><\/p>\n<\/blockquote>\n\n\n\n<p><code>VHT NDP Announcement<\/code>\u5c5e\u4e8e<code>802.11ac<\/code>\u5373<code>VHT<\/code>)\u5f15\u5165\u7684\u6ce2\u675f\u6210\u5f62(<code>Beamforming<\/code>)\u673a\u5236\u4e2d\u7684\u5173\u952e\u7ec4\u6210\u90e8\u5206,\u7528\u9014\uff1a\u7531\u6ce2\u675f\u6210\u5f62\u5668(<code>Beamformer<\/code>\uff0c\u901a\u5e38\u662f<code>AP<\/code>)\u53d1\u9001\uff0c\u7528\u4e8e\u542f\u52a8\u4fe1\u9053\u63a2\u6d4b\u4e0e\u53cd\u9988\u6d41\u7a0b\uff0c\u4ee5\u4fbf\u540e\u7eed\u6267\u884c\u663e\u5f0f\u6ce2\u675f\u6210\u5f62<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">VHT NDP Announcement\u5e27\u7ed3\u6784<\/h3>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/www.garfield-blog.top\/wp-content\/uploads\/2025\/12\/VHT-NDP-Announcement.jpg'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1525\" height=\"284\" data-original=\"https:\/\/www.garfield-blog.top\/wp-content\/uploads\/2025\/12\/VHT-NDP-Announcement.jpg\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-460\"  sizes=\"auto, (max-width: 1525px) 100vw, 1525px\" \/><\/div><\/figure>\n\n\n\n<p><code>VHT NDP Announcement<\/code>\u5e27\u81f3\u5c11\u5305\u542b\u4e00\u4e2a<code>STA<\/code>\u4fe1\u606f(<code>STA Info<\/code>)\u5b57\u6bb5\u3002\u5982\u679c\u8be5<code>VHT NDP Announcement<\/code>\u5e27\u4ec5\u5305\u542b\u4e00\u4e2a<code>STA Info<\/code>\u5b57\u6bb5\uff0c\u5219RA\u5b57\u6bb5\u8bbe\u7f6e\u4e3a\u80fd\u591f\u63d0\u4f9b\u53cd\u9988\u7684<code>STA<\/code>\u7684\u5730\u5740\uff1b\u5982\u679c\u8be5\u5e27\u5305\u542b\u591a\u4e2a<code>STA Info<\/code>\u5b57\u6bb5\uff0c\u5219<code>RA<\/code>\u5b57\u6bb5\u8bbe\u7f6e\u4e3a\u5e7f\u64ad\u5730\u5740<\/p>\n\n\n\n<p><code>TA<\/code>\u5b57\u6bb5\u8bbe\u7f6e\u4e3a\u53d1\u9001\u8be5<code>VHT NDP Announcement<\/code>\u5e27\u7684<code>STA<\/code>\u7684\u5730\u5740\uff0c\u6216\u8be5<code>STA<\/code>\u7684\u5e26\u5bbd\u4fe1\u4ee4<code>TA<\/code>(\u4f20\u8f93\u5730\u5740)\u5f53<code>VHT STA<\/code>\u4ee5\u975e<code>HT<\/code>\u683c\u5f0f\u6216\u975e<code>HT<\/code>\u91cd\u590d\u683c\u5f0f\u53d1\u9001<code>VHT NDP Announcement<\/code>\u5e27\uff0c\u5e76\u4e14\u52a0\u6270\u5e8f\u5217\u643a\u5e26\u4e86<code>TXVECTOR<\/code>\u53c2\u6570<code>CH_BANDWIDTH_IN_NON_HT<\/code>\u65f6\uff0c<code>TA<\/code>\u5b57\u6bb5\u5e94\u8bbe\u7f6e\u4e3a\u4e00\u4e2a\u5e26\u5bbd\u4fe1\u4ee4<code>TA<\/code><\/p>\n\n\n\n<p>\u63a2\u6d4b\u5bf9\u8bdd\u4ee4\u724c(<code>Sounding Dialog Token<\/code>)\u5b57\u6bb5\u4e2d\u7684\u63a2\u6d4b\u5bf9\u8bdd\u4ee4\u724c\u7f16\u53f7(<code>Sounding Dialog Token Number<\/code>)\u5b50\u5b57\u6bb5\u5305\u542b\u4e00\u4e2a\u7531\u6ce2\u675f\u6210\u5f62\u5668(<code>beamformer<\/code>)\u9009\u5b9a\u7684\u503c\uff0c\u7528\u4e8e\u6807\u8bc6\u8be5<code>VHT NDP Announcement<\/code>\u5e27<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u63a7\u5236\u5e27\u6269\u5c55(Control Frame Extension)<\/h2>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u7b14\u8005\u6ce8\uff1aControl Frame Extension<strong>\u8be6\u60c5\u89c1IEEE 802.11-2016\u6587\u68639.2.4.1<\/strong><\/p>\n<\/blockquote>\n\n\n\n<p><code>IEEE 802.11ax<\/code>\u5f15\u5165\u4e86\u63a7\u5236\u5e27\u6269\u5c55(<code>Control Frame Extension<\/code>) \u673a\u5236\uff0c\u4f5c\u4e3a<code>HE-SIG-B<\/code>\u5b57\u6bb5\u7684\u4e00\u90e8\u5206\uff0c\u5728\u540c\u4e00\u4e2a\u7269\u7406\u5e27\u5185\u643a\u5e26\u591a\u4e2a\u7528\u6237\u7684\u63a7\u5236\u4fe1\u606f<\/p>\n\n\n\n<p>\u63a7\u5236\u5e27\u6269\u5c55\u5e76\u4e0d\u662f\u4e00\u4e2a\u72ec\u7acb\u7684<code>MAC<\/code>\u5e27\uff0c\u800c\u662f\u5d4c\u5165\u5728 HE \u6216 EHT \u7269\u7406\u5e27(<code>PPDU<\/code>)\u4e2d\u7684\u63a7\u5236\u4fe1\u606f\u5b57\u6bb5\uff0c\u7528\u4e8e\u5728 \u4e0b\u884c\u591a\u7528\u6237\u4f20\u8f93(<code>DL MU<\/code>) \u4e2d\u5411\u591a\u4e2a\u63a5\u6536\u7aef(<code>STAs<\/code>)\u4f20\u9012\u5404\u81ea\u6240\u9700\u7684\u63a7\u5236\u6307\u4ee4\uff0c\u4f8b\u5982\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5404\u81ea\u7684<code>BlockAckReq<\/code><\/li>\n\n\n\n<li>\u5404\u81ea\u7684\u7f13\u5b58\u72b6\u6001\u8bf7\u6c42(<code>Buffer Status Report Request<\/code>)<\/li>\n\n\n\n<li>\u5176\u4ed6\u6bcf\u7528\u6237\u7c92\u5ea6\u7684\u63a7\u5236\u4fe1\u606f<\/li>\n<\/ul>\n\n\n\n<p>\u5b83\u672c\u8d28\u4e0a\u662f\u4e00\u79cd \u201c\u591a\u7528\u6237\u63a7\u5236\u4fe1\u606f\u590d\u7528\u201d\u673a\u5236\uff0c\u4f7f\u5f97<code>AP<\/code>\u53ef\u4ee5\u5728\u4e00\u6b21\u4f20\u8f93\u4e2d\u540c\u65f6\u89e6\u53d1\u591a\u4e2a<code>STA<\/code>\u7684\u54cd\u5e94(\u5982<code>BlockAck<\/code>)\uff0c\u800c\u65e0\u9700\u9010\u4e2a\u53d1\u9001\u72ec\u7acb\u7684\u63a7\u5236\u5e27<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u63a7\u5236\u5e27\u6269\u5c55\u7ed3\u6784<\/h3>\n\n\n\n<p>\u5e27\u63a7\u5236(<code>Frame Control<\/code>)\u5b57\u6bb5\u7684\u524d\u4e09\u4e2a\u5b50\u5b57\u6bb5\u5206\u522b\u662f\u534f\u8bae\u7248\u672c(<code>Protocol Version<\/code>)\u3001\u7c7b\u578b(<code>Type<\/code>)\u548c\u5b50\u7c7b\u578b(<code>Subtype<\/code>)\u3002\u5e27\u63a7\u5236\u5b57\u6bb5\u4e2d\u5176\u4f59\u7684\u5b50\u5b57\u6bb5\u53d6\u51b3\u4e8e\u7c7b\u578b\u548c\u5b50\u7c7b\u578b\u5b50\u5b57\u6bb5\u7684\u53d6\u503c\u3002<\/p>\n\n\n\n<p>\u5f53\u7c7b\u578b(<code>Type<\/code>)\u5b50\u5b57\u6bb5\u7684\u503c\u4e0d\u7b49\u4e8e<code>1<\/code>\uff0c\u6216\u8005\u5b50\u7c7b\u578b(<code>Subtype<\/code>)\u5b50\u5b57\u6bb5\u7684\u503c\u4e0d\u7b49\u4e8e<code>6<\/code>\u65f6\uff0c\u5e27\u63a7\u5236\u5b57\u6bb5\u4e2d\u7684\u5176\u4f59\u5b50\u5b57\u6bb5\u5305\u62ec\uff1a<code>To DS<\/code>\u3001<code>From DS<\/code>\u3001<code>More Fragments<\/code>(\u66f4\u591a\u5206\u7247)\u3001<code>Retry<\/code>(\u91cd\u4f20)\u3001<code>Power Management<\/code>(\u7701\u7535\u7ba1\u7406)\u3001<code>More Data<\/code>(\u66f4\u591a\u6570\u636e)\u3001<code>Protected Frame<\/code>(\u53d7\u4fdd\u62a4\u5e27)\u4ee5\u53ca<code>+HTC\/Order<\/code>\u3002\u5728\u6b64\u60c5\u51b5\u4e0b\uff0c\u5e27\u63a7\u5236\u5b57\u6bb5\u7684\u683c\u5f0f\u5982\u56fe\u6240\u793a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/www.garfield-blog.top\/wp-content\/uploads\/2025\/12\/Frame-Control.jpg'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"2225\" height=\"356\" data-original=\"https:\/\/www.garfield-blog.top\/wp-content\/uploads\/2025\/12\/Frame-Control.jpg\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-456\"  sizes=\"auto, (max-width: 2225px) 100vw, 2225px\" \/><\/div><\/figure>\n\n\n\n<p>\u5f53\u7c7b\u578b(<code>Type<\/code>)\u5b50\u5b57\u6bb5\u7684\u503c\u7b49\u4e8e<code>1<\/code>\u4e14\u5b50\u7c7b\u578b(<code>Subtype<\/code>)\u5b50\u5b57\u6bb5\u7684\u503c\u7b49\u4e8e<code>6<\/code>\u65f6\uff0c\u5e27\u63a7\u5236(<code>Frame Control<\/code>)\u5b57\u6bb5\u4e2d\u7684\u5176\u4f59\u5b50\u5b57\u6bb5\u5982\u4e0b\uff1a\u63a7\u5236\u5e27\u6269\u5c55(<code>Control Frame Extension<\/code>)\u3001\u7701\u7535\u7ba1\u7406(<code>Power Management<\/code>)\u3001\u66f4\u591a\u6570\u636e(<code>More Data<\/code>)\u3001\u53d7\u4fdd\u62a4\u5e27(<code>Protected Frame<\/code>)\u4ee5\u53ca<code>+HTC\/Order<\/code>\u3002\u5728\u6b64\u60c5\u51b5\u4e0b\uff0c\u5e27\u63a7\u5236\u5b57\u6bb5\u7684\u683c\u5f0f\u5982\u56fe\u6240\u793a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/www.garfield-blog.top\/wp-content\/uploads\/2025\/12\/Frame-Control-1.jpg'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1884\" height=\"356\" data-original=\"https:\/\/www.garfield-blog.top\/wp-content\/uploads\/2025\/12\/Frame-Control-1.jpg\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-455\"  sizes=\"auto, (max-width: 1884px) 100vw, 1884px\" \/><\/div><\/figure>\n\n\n\n<p><strong>Control Frame Extension\u5b57\u6bb5\u7684\u5177\u4f53\u542b\u4e49\u89c1\u4e0b\u8868<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Control Frame Extension value B11 B10 B9 B8<\/th><th>Description<\/th><\/tr><\/thead><tbody><tr><td><code>0000<\/code><\/td><td><code>Reserved<\/code><\/td><\/tr><tr><td><code>0001<\/code><\/td><td><code>Reserved<\/code><\/td><\/tr><tr><td><code>0010<\/code><\/td><td><code>Poll<\/code><\/td><\/tr><tr><td><code>0011<\/code><\/td><td><code>SPR<\/code><\/td><\/tr><tr><td><code>0100<\/code><\/td><td><code>Grant<\/code><\/td><\/tr><tr><td><code>0101<\/code><\/td><td><code>DMG CTS<\/code><\/td><\/tr><tr><td><code>0110<\/code><\/td><td><code>DMG DTS<\/code><\/td><\/tr><tr><td><code>0111<\/code><\/td><td><code>Grant Ack<\/code><\/td><\/tr><tr><td><code>1000<\/code><\/td><td><code>SSW<\/code><\/td><\/tr><tr><td><code>1001<\/code><\/td><td><code>SSW-Feedback<\/code><\/td><\/tr><tr><td><code>1010<\/code><\/td><td><code>SSW-Ack<\/code><\/td><\/tr><tr><td><code>1011-1111<\/code><\/td><td><code>Reserved<\/code><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">\u5757\u786e\u8ba4\u8bf7\u6c42\u5e27(Block Ack Request)<\/h2>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u7b14\u8005\u6ce8\uff1aBlock Ack Request\u5e27<strong>\u8be6\u60c5\u89c1IEEE 802.11-2016\u6587\u68639.3.1.8<\/strong><\/p>\n<\/blockquote>\n\n\n\n<p><code>Block Acknowledgment Request<\/code>(<code>BlockAckReq<\/code>) \u5e27\u662f\u7528\u4e8e\u8bf7\u6c42\u5bf9\u4e00\u7ec4\u5df2\u53d1\u9001\u7684<code>MPDU<\/code>\u8fdb\u884c\u6279\u91cf\u786e\u8ba4\u7684\u4e00\u79cd\u63a7\u5236\u5e27\u3002\u5b83\u662f\u5728\u652f\u6301<code>Block Ack<\/code>\u673a\u5236\u7684\u9ad8\u541e\u5410\u91cf(<code>HT<\/code>)\u6216\u751a\u9ad8\u541e\u5410\u91cf(<code>VHT<\/code>)\u7b49<code>802.11n\/802.11ac\/802.11ax<\/code>\u7b49\u534f\u8bae\u4e2d\u5f15\u5165\u7684\u91cd\u8981\u673a\u5236\uff0c\u7528\u4e8e\u63d0\u5347\u6548\u7387\u3001\u51cf\u5c11<code>ACK<\/code>\u5f00\u9500<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Block Ack Request\u5e27\u7ed3\u6784<\/h3>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/www.garfield-blog.top\/wp-content\/uploads\/2025\/12\/BlockAckReq-frame.jpg'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1750\" height=\"375\" data-original=\"https:\/\/www.garfield-blog.top\/wp-content\/uploads\/2025\/12\/BlockAckReq-frame.jpg\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-451\"  sizes=\"auto, (max-width: 1750px) 100vw, 1750px\" \/><\/div><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Duration\u5b57\u6bb5\u7684\u503c\uff1a<\/strong>\u6309\u7167<code>IEEE 802.11-2016 9.2.5<\/code>\u8282\u4e2d\u7684\u89c4\u5b9a\u8fdb\u884c\u8bbe\u7f6e<\/li>\n\n\n\n<li><strong>BlockAckReq\u5e27\u7684RA\u5b57\u6bb5\uff1a<\/strong>\u4e3a\u63a5\u6536\u8be5\u5e27\u7684<code>STA<\/code>\u7684\u5730\u5740<br><code>BlockAckReq<\/code>\u5e27\u7684<code>TA<\/code>\u5b57\u6bb5\uff1a\u4e3a\u53d1\u9001<code>BlockAckReq<\/code>\u5e27\u7684STA\u7684\u5730\u5740\uff0c\u6216\u4e00\u4e2a\u5e26\u5bbd\u4fe1\u4ee4<code>TA<\/code>(\u4f20\u8f93\u5730\u5740)\u3002\u5f53<code>VHT STA<\/code>\u4ee5\u975e<code>HT<\/code>\u683c\u5f0f\u6216\u975e<code>HT<\/code>\u91cd\u590d\u683c\u5f0f\u53d1\u9001<code>BlockAckReq<\/code>\u5e27\uff0c\u5e76\u4e14\u52a0\u6270\u5e8f\u5217\u643a\u5e26\u4e86<code>TXVECTOR<\/code>\u53c2\u6570<code>CH_BANDWIDTH_IN_NON_HT<\/code>\u65f6\uff0c<code>TA<\/code>\u5b57\u6bb5\u7684\u503c\u5373\u4e3a\u4e00\u4e2a\u5e26\u5bbd\u4fe1\u4ee4<code>TA<\/code><\/li>\n\n\n\n<li><strong>BAR\uff1a<\/strong>\u5373<code>Block Acknowledgment Request<\/code>\uff0c\u5757\u786e\u8ba4\u8bf7\u6c42<\/li>\n\n\n\n<li><strong>FCS\uff1a<\/strong>\u5e27\u5c3e<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Block Ack Request\u5e27\u7684\u4f5c\u7528<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u6279\u91cf\u786e\u8ba4\u8bf7\u6c42<\/strong>\uff1a\u53d1\u9001\u65b9\u5728\u8fde\u7eed\u53d1\u9001\u591a\u4e2a\u6570\u636e\u5e27(<code>MPDUs<\/code>)\u540e\uff0c\u4e0d\u4e3a\u6bcf\u4e2a\u5e27\u5355\u72ec\u7b49\u5f85<code>ACK<\/code>\uff0c\u800c\u662f\u53d1\u9001\u4e00\u4e2a<code>BlockAckReq<\/code>\u5e27\uff0c\u8bf7\u6c42\u63a5\u6536\u65b9\u7528\u4e00\u4e2a<code>BlockAck<\/code>\u5e27\u4e00\u6b21\u6027\u786e\u8ba4\u591a\u4e2a\u5e27\u7684\u63a5\u6536\u72b6\u6001<\/li>\n\n\n\n<li><strong>\u63d0\u9ad8\u4fe1\u9053\u5229\u7528\u7387<\/strong>\uff1a\u907f\u514d\u4e86\u9010\u5e27<code>ACK<\/code>\u7684\u5f00\u9500\uff0c\u5c24\u5176\u5728\u9ad8\u541e\u5410\u573a\u666f\u4e0b\u663e\u8457\u63d0\u5347\u6548\u7387<\/li>\n\n\n\n<li><strong>\u652f\u6301\u91cd\u4f20\u673a\u5236<\/strong>\uff1a\u63a5\u6536\u65b9\u5728<code>BlockAck<\/code>\u4e2d\u4f1a\u6307\u660e\u54ea\u4e9b\u5e27\u6210\u529f\u63a5\u6536\u3001\u54ea\u4e9b\u672a\u6536\u5230\uff0c\u53d1\u9001\u65b9\u53ef\u636e\u6b64\u91cd\u4f20\u5931\u8d25\u5e27<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">\u5757\u786e\u8ba4\u5e27(Block Ack)<\/h2>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u7b14\u8005\u6ce8\uff1aBlock Ack\u5e27<strong>\u8be6\u60c5\u89c1\u300a\u65e0\u7ebf\u6743\u5a01\u6307\u5357\u7b2c\u4e94\u7248\u300b9.10.2\u6216IEEE 802.11-2016\u6587\u68636.3.29<\/strong><\/p>\n<\/blockquote>\n\n\n\n<p><code>802.11e<\/code>\u4fee\u6b63\u6848\u5b9a\u4e49\u4e86\u5757\u786e\u8ba4\u673a\u5236\uff0c\u8fd9\u79cd\u673a\u5236\u5c06\u591a\u4e2a\u786e\u8ba4\u5e27\u805a\u5408\u4e3a\u4e00\u4e2a\u786e\u8ba4\u5e27\u4ee5\u63d0\u9ad8\u4fe1\u9053\u5229\u7528\u7387\u3002\u5757\u786e\u8ba4\u673a\u5236\u5305\u62ec\u4ee5\u4e0b\u4e24\u7c7b<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5373\u65f6\u5757\u786e\u8ba4(<code>immediate BA<\/code>):\u9002\u7528\u4e8e\u5ef6\u8fdf\u5bb9\u5fcd\u5ea6\u8f83\u4f4e\u7684\u6d41\u91cf<\/li>\n\n\n\n<li>\u5ef6\u8fdf\u5757\u786e\u8ba4(<code>delayed BA)<\/code>:\u9002\u7528\u4e8e\u5ef6\u8fdf\u5bb9\u5fcd\u5ea6\u8f83\u9ad8\u7684\u6d41\u91cf<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Block Ack\u5e27\u4f5c\u7528<\/h3>\n\n\n\n<p>\u53d1\u8d77\u65b9\u7ec8\u7aef\u5411\u63a5\u6536\u65b9\u7ec8\u7aef\u53d1\u9001\u4e00\u4e2a<code>QoS<\/code>\u6570\u636e\u5e27\u5757\uff0c\u5e76\u901a\u8fc7\u5757\u786e\u8ba4\u8bf7\u6c42\u5e27\u8bf7\u6c42\u786e\u8ba4\u6240\u6709<code>QoS<\/code>\u6570\u636e\u5e27\u3002\u6709\u522b\u4e8e\u5355\u72ec\u786e\u8ba4\u6bcf\u4e2a\u5355\u64ad\u5e27\uff0c\u4e00\u4e2a\u5757\u786e\u8ba4\u5e27\u53ef\u4ee5\u786e\u8ba4\u6574\u4e2a<code>QoS<\/code>\u6570\u636e\u5e27\u5757\u3002\u5757\u786e\u8ba4\u5e27\u4e2d\u7684\u4f4d\u56fe(<code>Bitmap<\/code>)\u5b57\u6bb5\u7528\u4e8e\u6807\u8bc6\u6240\u6709\u63a5\u6536\u6570\u636e\u5e27\u7684\u72b6\u6001\u3002\u5982\u679c\u53ea\u6709\u4e00\u4e2a\u6570\u636e\u5e27\u635f\u574f\uff0c\u90a3\u4e48\u53ea\u9700\u8981\u91cd\u4f20\u8be5\u5e27\u3002\u4f7f\u7528\u5757\u786e\u8ba4\u5e27\u800c\u975e\u4f20\u7edf\u7684\u786e\u8ba4\u5e27\u6709\u52a9\u4e8e\u51cf\u5c11\u4ecb\u8d28\u4e89\u7528\u5f00\u9500\uff0c\u4ece\u800c\u63d0\u9ad8\u6548\u7387<\/p>\n\n\n\n<p>\u5982\u56fe\u6240\u793a\uff0c\u5757\u786e\u8ba4\u673a\u5236\u6700\u521d\u5b9a\u4e49\u4e3a\u4e0e\u201c\u5e27\u7a81\u53d1\u201d\u4e00\u8d77\u4f7f\u7528\uff0c\u4f46\u76ee\u524d\u66f4\u5e38\u7528\u4e8e<code>A-MPDU<\/code>\u5e27\u805a\u5408<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/www.garfield-blog.top\/wp-content\/uploads\/2025\/12\/\u5373\u65f6\u5757\u786e\u8ba4.jpg'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"2172\" height=\"1391\" data-original=\"https:\/\/www.garfield-blog.top\/wp-content\/uploads\/2025\/12\/\u5373\u65f6\u5757\u786e\u8ba4.jpg\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-461\"  sizes=\"auto, (max-width: 2172px) 100vw, 2172px\" \/><\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">\u7701\u7535\u8f6e\u8be2\u5e27(PS-Poll)<\/h2>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u7b14\u8005\u6ce8\uff1aPS-Poll\u5e27<strong>\u8be6\u60c5\u89c1\u300a\u65e0\u7ebf\u6743\u5a01\u6307\u5357\u7b2c\u4e94\u7248\u300b9.10.3\u6216IEEE 802.11-2016\u6587\u68639.3.1.5<\/strong><\/p>\n<\/blockquote>\n\n\n\n<p><code>Power Save Poll<\/code>\u662f\u4e13\u95e8\u7528\u4e8e\u652f\u6301\u5904\u4e8e\u7701\u7535\u6a21\u5f0f\u7684\u7ad9\u70b9(<code>STA<\/code>\uff0c\u5982\u624b\u673a\u3001\u7b14\u8bb0\u672c\u7b49)\u4ece\u63a5\u5165\u70b9(<code>AP<\/code>)\u83b7\u53d6\u7f13\u5b58\u7684\u6570\u636e\u3002\u91c7\u7528\u9057\u7559\u7535\u6e90\u7ba1\u7406\u673a\u5236\u7684\u5ba2\u6237\u7aef\u901a\u8fc7\u8282\u7535\u8f6e\u8be2\u5e27\u8bf7\u6c42\u63a5\u5165\u70b9\u53d1\u9001\u7f13\u51b2\u6d41\u91cf\u3002\u5728\u8282\u7535\u8f6e\u8be2\u5e27\u4e2d\uff0c<code>\u6301\u7eed\u65f6\u95f4\/ID<\/code>\u5b57\u6bb5\u4f5c\u4e3a<code>AID<\/code>\u503c\uff1b\u6362\u8a00\u4e4b\uff0c\u5ba2\u6237\u7aef\u5411\u63a5\u5165\u70b9\u6807\u8bc6\u81ea\u5df1\u5e76\u8bf7\u6c42\u7f13\u51b2\u7684\u5355\u64ad\u5e27\u3002\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c<code>\u6301\u7eed\u65f6\u95f4\/ID<\/code>\u5b57\u6bb5\u4ec5\u5145\u5f53\u6807\u8bc6\u7b26\uff0c\u4e0d\u7528\u4e8e\u6301\u7eed\u65f6\u95f4\u6216\u91cd\u7f6e<code>NAV<\/code>\u8ba1\u65f6\u5668\u3002\u8bf7\u6ce8\u610f\uff0c\u4ec5\u6709\u8282\u7535\u8f6e\u8be2\u5e27\u4f7f\u7528<code>\u6301\u7eed\u65f6\u95f4\/ID<\/code>\u5b57\u6bb5\u4f5c\u4e3a<code>AID<\/code><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">PS-Poll\u5e27\u7ed3\u6784<\/h3>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/www.garfield-blog.top\/wp-content\/uploads\/2025\/12\/PS-Poll-frame-format.jpg'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"956\" height=\"303\" data-original=\"https:\/\/www.garfield-blog.top\/wp-content\/uploads\/2025\/12\/PS-Poll-frame-format.jpg\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-457\"  sizes=\"auto, (max-width: 956px) 100vw, 956px\" \/><\/div><\/figure>\n\n\n\n<p><code>BSSID<\/code>\u662f<code>AP<\/code>\u4e2d\u6240\u5305\u542b\u7684<code>STA<\/code>\u7684\u5730\u5740\u3002<code>TA<\/code>\u5b57\u6bb5\u7684\u503c\u662f\u53d1\u9001\u8be5\u5e27\u7684<code>STA<\/code>\u7684\u5730\u5740\uff0c\u6216\u8005\u662f\u4e00\u4e2a\u5e26\u5bbd\u4fe1\u4ee4<code>TA<\/code>(<code>Bandwidth Signaling TA<\/code>)\u3002\u5f53<code>VHT STA<\/code>\u4ee5\u975e<code>HT<\/code>\u683c\u5f0f\u6216\u975e<code>HT<\/code>\u91cd\u590d\u683c\u5f0f\u53d1\u9001<code>PS-Poll<\/code>\u5e27\uff0c\u5e76\u4e14\u52a0\u6270\u5e8f\u5217\u643a\u5e26\u4e86<code>TXVECTOR<\/code>\u53c2\u6570<code>CH_BANDWIDTH_IN_NON_HT<\/code>\u65f6\uff0c<code>TA<\/code>\u5b57\u6bb5\u7684\u503c\u5373\u4e3a\u5e26\u5bbd\u4fe1\u4ee4<code>TA<\/code>\u3002<code>ID<\/code>\u5b57\u6bb5\u5305\u542b<code>AP<\/code>\u5728\u5efa\u7acb\u8be5<code>STA<\/code>\u5f53\u524d\u5173\u8054\u7684(\u91cd)\u5173\u8054\u54cd\u5e94\u5e27\u4e2d\u5206\u914d\u7ed9\u8be5<code>STA<\/code>\u7684<code>AID<\/code>\u503c\uff0c\u4e14\u5176\u4e24\u4e2a\u6700\u9ad8\u6709\u6548\u4f4d(<code>MSB<\/code>)\u88ab\u7f6e\u4e3a<code>1<\/code><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u8bf7\u6c42\u53d1\u9001\u5e27(RTS) &amp; \u6e05\u9664\u53d1\u9001\u5e27(CTS)<\/h2>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u7b14\u8005\u6ce8\uff1aRTS\u5e27 &amp; CTS\u5e27<strong>\u8be6\u60c5\u89c1\u300a\u65e0\u7ebf\u6743\u5a01\u6307\u5357\u7b2c\u4e94\u7248\u300b 9.10.4\u6216IEEE 802.11-2016\u6587\u68639.3.1.2 &amp; 9.3.1.3<\/strong><\/p>\n<\/blockquote>\n\n\n\n<p><strong>RTS<\/strong>(<code>Request to Send<\/code>)\u548c <strong>CTS<\/strong>(<code>Clear to Send<\/code>)\u662f\u4e00\u5bf9\u7528\u4e8e\u89e3\u51b3\u9690\u85cf\u8282\u70b9\u95ee\u9898\u5e76\u51cf\u5c11\u51b2\u7a81\u7684\u63a7\u5236\u5e27\u3002\u5b83\u4eec\u5171\u540c\u6784\u6210\u4e86<code>RTS\/CTS<\/code>\u63e1\u624b\u673a\u5236\uff0c\u662f<code>CSMA\/CA<\/code>(\u8f7d\u6ce2\u4fa6\u542c\u591a\u8def\u8bbf\u95ee\/\u51b2\u7a81\u907f\u514d)\u534f\u8bae\u7684\u91cd\u8981\u8865\u5145<\/p>\n\n\n\n<p><strong>\u89e3\u51b3\u9690\u85cf\u8282\u70b9\u95ee\u9898<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u573a\u666f<\/strong>\uff1a\n<ul class=\"wp-block-list\">\n<li><code>STA A<\/code>\u548c<code>STA C<\/code>\u90fd\u8fde\u63a5\u5230\u540c\u4e00\u4e2a<code>AP<\/code><\/li>\n\n\n\n<li><code>A<\/code>\u80fd\u201c\u770b\u5230\u201d<code>AP<\/code>\uff0c<code>C<\/code>\u4e5f\u80fd\u201c\u770b\u5230\u201d<code>AP<\/code>\uff0c\u4f46 <strong>A \u548c C \u5f7c\u6b64\u65e0\u6cd5\u4e92\u76f8\u4fa6\u542c\u5230\u5bf9\u65b9<\/strong>(\u4f8b\u5982\u88ab\u5899\u9694\u5f00)<\/li>\n\n\n\n<li>\u5982\u679c<code>A<\/code>\u548c<code>C<\/code>\u540c\u65f6\u5411<code>AP<\/code>\u53d1\u9001\u6570\u636e\uff0c\u4f1a\u5728<code>AP<\/code>\u5904\u53d1\u751f\u78b0\u649e\uff0c\u5bfc\u81f4\u4f20\u8f93\u5931\u8d25<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>RTS\/CTS \u5982\u4f55\u89e3\u51b3<\/strong>\uff1f\n<ol class=\"wp-block-list\">\n<li><code>A<\/code>\u60f3\u53d1\u6570\u636e \u2192 \u5148\u53d1<code>RTS<\/code>\u7ed9<code>AP<\/code><\/li>\n\n\n\n<li><code>AP<\/code>\u6536\u5230<code>RTS<\/code>\u2192 \u56de\u590d<code>CTS<\/code><\/li>\n\n\n\n<li><code>CTS<\/code>\u5e27\u88ab<code>A<\/code>\u548c<code>C<\/code>\u90fd\u80fd\u6536\u5230(\u56e0\u4e3a<code>AP<\/code>\u529f\u7387\u901a\u5e38\u66f4\u5f3a\u3001\u4f4d\u7f6e\u5c45\u4e2d)<\/li>\n\n\n\n<li><code>C<\/code>\u542c\u5230<code>CTS<\/code>\u540e\uff0c\u77e5\u9053<code>AP<\/code>\u5373\u5c06\u63a5\u6536<code>A<\/code>\u7684\u6570\u636e\uff0c\u4e8e\u662f\u4e3b\u52a8\u9000\u907f\uff0c\u6682\u505c\u53d1\u9001<\/li>\n\n\n\n<li><code>A<\/code>\u5b89\u5168\u5730\u53d1\u9001\u6570\u636e\uff0c\u907f\u514d\u78b0\u649e<\/li>\n<\/ol>\n<\/li>\n<\/ul>\n\n\n\n<p><strong>\u51cf\u5c11\u957f\u5e27\u4f20\u8f93\u51b2\u7a81\u7684\u4ee3\u4ef7<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5982\u679c\u76f4\u63a5\u53d1\u9001\u4e00\u4e2a\u5f88\u957f\u7684\u6570\u636e\u5e27(\u5982\u89c6\u9891\u5305)\uff0c\u4e00\u65e6\u51b2\u7a81\uff0c\u6d6a\u8d39\u5927\u91cf\u65f6\u95f4\u548c\u5e26\u5bbd<\/li>\n\n\n\n<li>\u4f7f\u7528\u77ed\u5c0f\u7684<code>RTS\/CTS<\/code>(\u901a\u5e38\u51e0\u5341\u5b57\u8282)\u5148\u201c\u63a2\u8def\u201d\uff0c\u5373\u4f7f\u51b2\u7a81\uff0c\u635f\u5931\u4e5f\u5c0f<\/li>\n\n\n\n<li>\u53ea\u6709<code>RTS\/CTS<\/code>\u6210\u529f\u4ea4\u6362\u540e\uff0c\u624d\u53d1\u9001\u957f\u6570\u636e\u5e27<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">RTS\u5e27\u7ed3\u6784<\/h3>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/www.garfield-blog.top\/wp-content\/uploads\/2025\/12\/RTS.jpg'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"887\" height=\"303\" data-original=\"https:\/\/www.garfield-blog.top\/wp-content\/uploads\/2025\/12\/RTS.jpg\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-458\"  sizes=\"auto, (max-width: 887px) 100vw, 887px\" \/><\/div><\/figure>\n\n\n\n<p><strong>RA \u5b57\u6bb5\uff1a<\/strong>\u662f\u65e0\u7ebf\u4ecb\u8d28(<code>WM<\/code>)\u4e0a\u9884\u671f\u76f4\u63a5\u63a5\u6536\u5f85\u53d1\u9001\u7684\u5355\u64ad\u6570\u636e\u5e27\u3001\u7ba1\u7406\u5e27\u6216\u63a7\u5236\u5e27\u7684<code>STA<\/code>\u7684\u5730\u5740<\/p>\n\n\n\n<p><strong>TA \u5b57\u6bb5\uff1a<\/strong>\u662f\u53d1\u9001<code>RTS<\/code>\u5e27\u7684<code>STA<\/code>\u7684\u5730\u5740\uff0c\u6216\u8005\u662f\u8be5<code>STA<\/code>\u7684\u5e26\u5bbd\u4fe1\u4ee4<code>TA<\/code>(<code>Bandwidth Signaling TA<\/code>)\u3002\u5f53<code>VHT STA<\/code>\u4ee5\u975e<code>HT<\/code>\u683c\u5f0f\u6216\u975e<code>HT<\/code>\u91cd\u590d\u683c\u5f0f\u53d1\u9001<code>RTS<\/code>\u5e27\uff0c\u4e14\u52a0\u6270\u5e8f\u5217\u643a\u5e26\u4e86<code>TXVECTOR<\/code>\u53c2\u6570<code>CH_BANDWIDTH_IN_NON_HT<\/code>\u548c<code>DYN_BANDWIDTH_IN_NON_HT<\/code>\u65f6\uff0c<code>TA<\/code>\u5b57\u6bb5\u5373\u4e3a\u5e26\u5bbd\u4fe1\u4ee4<code>TA<\/code><\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/www.garfield-blog.top\/wp-content\/uploads\/2025\/12\/RTSCTS\u6301\u7eed\u65f6\u95f4.jpg'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1566\" height=\"547\" data-original=\"https:\/\/www.garfield-blog.top\/wp-content\/uploads\/2025\/12\/RTSCTS\u6301\u7eed\u65f6\u95f4.jpg\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-459\"  sizes=\"auto, (max-width: 1566px) 100vw, 1566px\" \/><\/div><\/figure>\n\n\n\n<p><strong>Duration\u5b57\u6bb5\uff1a<\/strong>\u5bf9\u4e8e\u6240\u6709\u7531\u975e<code>QoS STA<\/code>\u53d1\u9001\u7684<code>RTS<\/code>\u5e27\uff0c<code>Duration<\/code>\u5b57\u6bb5\u7684\u503c(\u5355\u4f4d\u4e3a\u5fae\u79d2)\u7b49\u4e8e<strong>\u53d1\u9001\u5f85\u5904\u7406\u7684\u6570\u636e\u5e27\u6216\u7ba1\u7406\u5e27\u6240\u9700\u7684\u65f6\u95f4\uff0c\u52a0\u4e0a\u4e00\u4e2a<code>CTS<\/code>\u5e27\u3001\u4e00\u4e2a<code>ACK<\/code>\u5e27\u4ee5\u53ca\u4e09\u4e2a<code>SIFS<\/code>\u7684\u65f6\u95f4\u603b\u548c<\/strong>\u3002\u5982\u679c\u8ba1\u7b97\u51fa\u7684\u6301\u7eed\u65f6\u95f4\u5305\u542b\u5c0f\u6570\u5fae\u79d2\uff0c\u5219\u5411\u4e0a\u53d6\u6574\u4e3a\u4e0b\u4e00\u4e2a\u6574\u6570<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">CTS\u5e27\u7ed3\u6784<\/h3>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/www.garfield-blog.top\/wp-content\/uploads\/2025\/12\/CTS.jpg'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"781\" height=\"300\" data-original=\"https:\/\/www.garfield-blog.top\/wp-content\/uploads\/2025\/12\/CTS.jpg\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-454\"  sizes=\"auto, (max-width: 781px) 100vw, 781px\" \/><\/div><\/figure>\n\n\n\n<p><strong>RA\u5b57\u6bb5\uff1a<\/strong>\u5f53<code>CTS<\/code>\u5e27\u662f\u5bf9<code>RTS<\/code>\u5e27\u7684\u54cd\u5e94\u65f6\uff0c<code>CTS<\/code>\u5e27\u4e2d<code>RA<\/code>\u5b57\u6bb5\u7684\u503c\u88ab\u8bbe\u4e3a<code>RTS<\/code>\u5e27<code>TA<\/code>\u5b57\u6bb5\u4e2d\u7684\u5730\u5740\uff0c\u5e76\u5f3a\u5236\u5c06<code>Individual\/Group<\/code>\u4f4d\u8bbe\u4e3a<code>0<\/code>\u3002\u5f53<code>CTS<\/code>\u5e27\u662f\u5e27\u4ea4\u6362\u5e8f\u5217\u4e2d\u7684\u7b2c\u4e00\u4e2a\u5e27\u65f6\uff0c<code>RA<\/code>\u5b57\u6bb5\u88ab\u8bbe\u4e3a\u53d1\u9001\u65b9\u7684<code>MAC<\/code>\u5730\u5740<\/p>\n\n\n\n<p><strong>Duration\u5b57\u6bb5\uff1a<\/strong>\u5bf9\u4e8e\u6240\u6709\u7531\u975e<code>QoS STA<\/code>\u53d1\u9001\u3001\u7528\u4e8e\u54cd\u5e94<code>RTS<\/code>\u5e27\u7684<code>CTS<\/code>\u5e27\uff0c\u5176<code>Duration<\/code>\u5b57\u6bb5\u7684\u503c\u7b49\u4e8e\u524d\u4e00\u4e2a<code>RTS<\/code>\u5e27<code>Duration<\/code>\u5b57\u6bb5\u4e2d\u7684\u503c\uff0c\u51cf\u53bb\u53d1\u9001\u8be5<code>CTS<\/code>\u5e27\u53ca\u5176<code>SIFS<\/code>\u6240\u9700\u7684\u65f6\u95f4(\u5355\u4f4d\u4e3a\u5fae\u79d2)\u3002\u5982\u679c\u8ba1\u7b97\u51fa\u7684\u6301\u7eed\u65f6\u95f4\u5305\u542b\u5c0f\u6570\u5fae\u79d2\uff0c\u5219\u5411\u4e0a\u53d6\u6574\u4e3a\u4e0b\u4e00\u4e2a\u6574\u6570<\/p>\n\n\n\n<p>\u5728\u975e<code>QoS STA<\/code>\u4e2d\uff0c\u5982\u679c<code>CTS<\/code>\u5e27\u662f\u5e27\u4ea4\u6362\u5e8f\u5217\u4e2d\u7684\u7b2c\u4e00\u4e2a\u5e27\uff0c\u4e14\u5f85\u53d1\u9001\u7684\u6570\u636e\u5e27\u6216\u7ba1\u7406\u5e27\u9700\u8981\u786e\u8ba4(<code>ACK<\/code>)\uff0c\u5219<code>Duration<\/code>\u5b57\u6bb5\u7684\u503c\u7b49\u4e8e\u53d1\u9001\u8be5\u5f85\u5904\u7406\u6570\u636e\u5e27\u6216\u7ba1\u7406\u5e27\u6240\u9700\u7684\u65f6\u95f4\uff0c\u52a0\u4e0a\u4e24\u4e2a<code>SIFS<\/code>\u548c\u4e00\u4e2a<code>ACK<\/code>\u5e27\u7684\u65f6\u95f4(\u5355\u4f4d\u4e3a\u5fae\u79d2)<br>\u5728\u975e<code>QoS STA<\/code>\u4e2d\uff0c\u5982\u679c<code>CTS<\/code>\u5e27\u662f\u5e27\u4ea4\u6362\u5e8f\u5217\u4e2d\u7684\u7b2c\u4e00\u4e2a\u5e27\uff0c\u4e14\u5f85\u53d1\u9001\u7684\u6570\u636e\u5e27\u6216\u7ba1\u7406\u5e27\u4e0d\u9700\u8981\u786e\u8ba4\uff0c\u5219<code>Duration<\/code>\u5b57\u6bb5\u7684\u503c\u7b49\u4e8e\u53d1\u9001\u8be5\u5f85\u5904\u7406\u6570\u636e\u5e27\u6216\u7ba1\u7406\u5e27\u6240\u9700\u7684\u65f6\u95f4\uff0c\u52a0\u4e0a\u4e00\u4e2a<code>SIFS<\/code>(\u5355\u4f4d\u4e3a\u5fae\u79d2)\u3002<br>\u5982\u679c\u8ba1\u7b97\u51fa\u7684\u6301\u7eed\u65f6\u95f4\u5305\u542b\u5c0f\u6570\u5fae\u79d2\uff0c\u5219\u5411\u4e0a\u53d6\u6574\u4e3a\u4e0b\u4e00\u4e2a\u6574\u6570<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u786e\u8ba4\u5e27(Ack)<\/h2>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u7b14\u8005\u6ce8\uff1aAck\u5e27<strong>\u8be6\u60c5\u89c1\u300a\u65e0\u7ebf\u6743\u5a01\u6307\u5357\u7b2c\u4e94\u7248\u300b 9.10.1\u6216IEEE 802.11-2016\u6587\u68639.3.1.4<\/strong><\/p>\n<\/blockquote>\n\n\n\n<p>\u7531\u4e8e<code>802.11<\/code>\u901a\u4fe1\u4f7f\u7528\u7684\u65e0\u7ebf\u4ecb\u8d28\u65e0\u6cd5\u786e\u4fdd\u6570\u636e\u4f20\u8f93\u6210\u529f\uff0c\u53d1\u9001\u7aef\u53ea\u80fd\u4f9d\u9760\u63a5\u6536\u7aef\u7684\u901a\u77e5\u6765\u5224\u65ad\u4f20\u8f93\u7684\u5e27\u662f\u5426\u5df2\u6b63\u786e\u63a5\u6536\u3002\u8fd9\u79cd\u901a\u77e5\u4f7f\u7528\u786e\u8ba4\u5e27<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">ACK\u5e27\u683c\u5f0f<\/h3>\n\n\n\n<p>\u5982\u56fe\u6240\u793a\uff0c\u786e\u8ba4\u5e27\u662f\u4e00\u79cd\u7531<code>14<\/code>\u5b57\u8282\u6784\u6210\u7684\u7b80\u5355\u5e27\u683c\u5f0f<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/www.garfield-blog.top\/wp-content\/uploads\/2025\/12\/Ack-frame-format.jpg'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1172\" height=\"369\" data-original=\"https:\/\/www.garfield-blog.top\/wp-content\/uploads\/2025\/12\/Ack-frame-format.jpg\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-449\"  sizes=\"auto, (max-width: 1172px) 100vw, 1172px\" \/><\/div><\/figure>\n\n\n\n<p>\u6536\u5230\u5355\u64ad\u5e27\u540e\uff0c\u63a5\u6536\u7aef\u5c06\u7b49\u5f85\u4e00\u6bb5\u5f88\u77ed\u7684\u65f6\u95f4(<code>SIFS<\/code>)\u3002\u63a5\u6536\u7aef\u590d\u5236\u6570\u636e\u5e27\u5305\u542b\u7684\u53d1\u9001\u7aef<code>MAC<\/code>\u5730\u5740\uff0c\u5e76\u5199\u5165\u786e\u8ba4\u5e27\u7684\u63a5\u6536\u673a\u5730\u5740(<code>RA<\/code>)\u5b57\u6bb5\u3002\u5982\u679c\u4e00\u5207\u987a\u5229\uff0c\u5728\u53d1\u9001\u7aef\u6536\u5230\u7684\u786e\u8ba4\u5e27\u4e2d\uff0c\u63a5\u6536\u673a\u5730\u5740\u5b57\u6bb5(<code>RA<\/code>)\u5305\u542b\u5176<code>MAC<\/code>\u5730\u5740\uff0c\u53d1\u9001\u7aef\u501f\u6b64\u83b7\u77e5\u63a5\u6536\u7aef\u5df2\u6536\u5230\u5355\u64ad\u5e27\u4e14\u6ca1\u6709\u635f\u574f<\/p>\n\n\n\n<p>\u6240\u6709\u5355\u64ad\u5e27\u4f20\u8f93\u5fc5\u987b\u7ecf\u8fc7\u9a8c\u8bc1\uff0c\u5426\u5219\u53d1\u9001\u7aef\u5fc5\u987b\u91cd\u4f20\u8be5\u5e27\u3002\u6240\u6709\u5355\u64ad\u5e27\u5fc5\u987b\u540e\u8ddf\u786e\u8ba4\u5e27\u3002\u5982\u679c\u5355\u64ad\u5e27\u7531\u4e8e\u4efb\u4f55\u539f\u56e0\u635f\u574f\uff0c\u5c06\u65e0\u6cd5\u901a\u8fc7<code>32<\/code>\u4f4d\u5faa\u73af\u5197\u4f59\u6821\u9a8c(\u5373\u5e27\u6821\u9a8c\u5e8f\u5217),\u5bfc\u81f4\u63a5\u6536\u7aef\u4e0d\u4f1a\u53d1\u9001\u786e\u8ba4\u5e27\u3002\u5982\u679c\u5355\u64ad\u5e27\u6ca1\u6709\u7ecf\u8fc7\u786e\u8ba4\uff0c\u53d1\u9001\u7aef\u5c06\u91cd\u4f20\u8be5\u5e27\u3002\u9664\u4e2a\u522b\u60c5\u51b5\u5916\uff0c\u5e7f\u64ad\u5e27\u548c\u591a\u64ad\u5e27\u4e0d\u9700\u8981\u786e\u8ba4<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u65e0\u7ade\u4e89\u7ed3\u675f\u5e27(CF-End)(\u5df2\u5e9f\u5f03)<\/h2>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u7b14\u8005\u6ce8\uff1a<strong>CF-End\u5e27\u5df2\u5e9f\u5f03\uff0c\u8be6\u60c5\u89c1IEEE 802.11-2016\u6587\u68639.3.1.6<\/strong><\/p>\n<\/blockquote>\n\n\n\n<p>\u65e9\u671f\u7684<code>802.11<\/code>\u6807\u51c6(\u5982<code>802.11-1999<\/code>\u548c<code>802.11b<\/code>)\u5b9a\u4e49\u4e86\u4e24\u79cd<code>MAC<\/code>\u8bbf\u95ee\u6a21\u5f0f\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u5206\u5e03\u5f0f\u534f\u8c03\u529f\u80fd<\/strong>(<code>DCF<\/code>)<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u57fa\u4e8e<code>CSMA\/CA<\/code>\uff0c\u6240\u6709\u7ad9\u70b9\u7ade\u4e89\u4fe1\u9053(\u5373\u201c\u6709\u7ade\u4e89\u201d)<\/li>\n\n\n\n<li>\u662f<code>Wi-Fi<\/code>\u6700\u5e38\u7528\u7684\u5de5\u4f5c\u65b9\u5f0f<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u70b9\u534f\u8c03\u529f\u80fd<\/strong>(<code>PCF<\/code>)(\u5df2\u5e9f\u5f03)<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u7531<code>AP<\/code>\u5145\u5f53\u70b9\u534f\u8c03\u5668(<code>Point Coordinator, PC<\/code>)\uff0c\u5728\u7279\u5b9a\u65f6\u95f4\u6bb5\u5185<strong>\u8f6e\u8be2\u7ad9\u70b9<\/strong>\uff0c\u907f\u514d\u7ade\u4e89<\/li>\n\n\n\n<li>\u8fd9\u4e2a\u65f6\u95f4\u6bb5\u79f0\u4e3a <strong>\u65e0\u7ade\u4e89\u5468\u671f<\/strong>(<code>CFP<\/code>)<\/li>\n\n\n\n<li><code>CFP<\/code>\u51fa\u73b0\u5728\u4fe1\u6807\u95f4\u9694(<code>Beacon Interval<\/code>)\u7684\u5f00\u59cb\u90e8\u5206\uff0c\u540e\u9762\u8ddf\u7740 DCF \u7684\u7ade\u4e89\u5468\u671f(<code>CP<\/code>)<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">CF-End\u7684\u4f5c\u7528<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u63d0\u524d\u7ec8\u6b62\u65e0\u7ade\u4e89\u5468\u671f<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6b63\u5e38\u60c5\u51b5\u4e0b\uff0c<code>CFP<\/code>\u6301\u7eed\u5230\u4fe1\u6807\u5e27\u4e2d\u6307\u5b9a\u7684<code>CFP Max Duration<\/code><\/li>\n\n\n\n<li>\u4f46\u5982\u679c<code>AP<\/code>\u5728\u5b8c\u6210\u6240\u6709\u8f6e\u8be2\u540e\u8fd8\u6709\u5269\u4f59\u65f6\u95f4\uff0c\u5b83\u4f1a\u53d1\u9001<code>CF-End<\/code>\u5e27<strong>\uff0c<\/strong>\u7acb\u5373\u91ca\u653e\u4fe1\u9053\uff0c\u8ba9\u5176\u4ed6\u7ad9\u70b9\u53ef\u4ee5\u63d0\u524d\u8fdb\u5165\u7ade\u4e89\u6a21\u5f0f(<code>DCF<\/code>)\uff0c\u63d0\u9ad8\u4fe1\u9053\u5229\u7528\u7387<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u9632\u6b62\u4fe1\u9053\u7a7a\u95f2\u6d6a\u8d39<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u82e5\u6ca1\u6709<code>CF-End<\/code>\uff0c\u5373\u4f7f<code>CFP<\/code>\u4e2d\u65e0\u6570\u636e\u4f20\u8f93\uff0c\u5176\u4ed6\u7ad9\u70b9\u4e5f\u5fc5\u987b\u7b49\u5230<code>CFP<\/code>\u7ed3\u675f\u624d\u80fd\u7ade\u4e89\u4fe1\u9053<\/li>\n\n\n\n<li><code>CF-End<\/code>\u5141\u8bb8 \u52a8\u6001\u7ed3\u675f<code>CFP<\/code>\uff0c\u63d0\u5347\u6548\u7387<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">CF-End\u5e27\u7684\u7ed3\u6784<\/h3>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/www.garfield-blog.top\/wp-content\/uploads\/2025\/12\/CF-End-frame-format.jpg'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1003\" height=\"303\" data-original=\"https:\/\/www.garfield-blog.top\/wp-content\/uploads\/2025\/12\/CF-End-frame-format.jpg\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-453\"  sizes=\"auto, (max-width: 1003px) 100vw, 1003px\" \/><\/div><\/figure>\n\n\n\n<p>\u5f53\u7531\u975e<code>DMG STA<\/code>\u53d1\u9001\u65f6\uff0c<code>Duration<\/code>\u5b57\u6bb5\u88ab\u8bbe\u4e3a<code>0<\/code>\u3002\u5f53\u7531<code>DMG STA<\/code>\u53d1\u9001\u65f6\uff0cDuration \u5b57\u6bb5\u88ab\u8bbe\u4e3a\u5b8c\u6210\u5176\u6240\u53c2\u4e0e\u7684<code>CF-End<\/code>\u622a\u65ad\u5e8f\u5217\u6240\u9700\u7684\u65f6\u95f4\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Duration = (i \u2013 1) \u00d7 (TXTIME(CF-End) + SIFS)<\/code><\/pre>\n\n\n\n<p>\u5176\u4e2d<code>i<\/code>\u7684\u53d6\u503c\u8303\u56f4\u4e3a<code>1<\/code>\u5230<code>3<\/code>\uff0c\u8868\u793a\u8be5<code>CF-End<\/code>\u5e27\u5728\u53cd\u5411\u622a\u65ad\u5e8f\u5217\u4e2d\u7684\u987a\u5e8f(\u5373<code>i=1<\/code>\u5bf9\u5e94\u5e8f\u5217\u4e2d\u7684\u6700\u540e\u4e00\u4e2a<code>CF-End<\/code>\u5e27)<\/p>\n\n\n\n<p>\u5f53\u7531\u975e<code>DMG STA<\/code>\u53d1\u9001\u65f6\uff0c<code>RA<\/code>\u5b57\u6bb5\u4e3a\u5e7f\u64ad\u7ec4\u5730\u5740\u3002\u5f53\u7531<code>DMG STA<\/code>\u53d1\u9001\u65f6\uff0cRA \u5b57\u6bb5\u4e3a\u9884\u671f\u76f4\u63a5\u63a5\u6536\u8be5\u5355\u64ad\u6570\u636e\u5e27\u6216\u7ba1\u7406\u5e27\u7684<code>STA<\/code>\u7684<code>MAC<\/code>\u5730\u5740\uff0c\u6216\u8005\u4e3a\u5e7f\u64ad\u7ec4\u5730\u5740<\/p>\n\n\n\n<p>\u5f53\u7531\u975e<code>DMG STA<\/code>\u53d1\u9001\u65f6\uff0c<code>BSSID<\/code>(<code>TA<\/code>)\u5b57\u6bb5\u4e3a<code>AP<\/code>\u4e2d\u6240\u5305\u542b\u7684<code>STA<\/code>\u5730\u5740\uff0c\u4f46\u6709\u4e00\u4e2a\u4f8b\u5916\uff1a\u5f53<code>VHT STA<\/code>\u4ee5\u975e<code>HT<\/code>\u683c\u5f0f\u6216\u975e HT \u91cd\u590d\u683c\u5f0f\u5411<code>VHT AP<\/code>\u53d1\u9001<code>CF-End<\/code>\u5e27\u65f6\uff0c<code>BSSID<\/code>(<code>TA<\/code>)\u5b57\u6bb5\u7684<code>Individual\/Group<\/code>\u4f4d\u88ab\u7f6e\u4e3a<code>1<\/code>\uff0c\u4ee5\u8868\u660e\u52a0\u6270\u5e8f\u5217\u643a\u5e26\u4e86<code>TXVECTOR<\/code>\u53c2\u6570<code>CH_BANDWIDTH_IN_NON_HT<\/code>\u3002\u5f53\u7531<code>DMG STA<\/code>\u53d1\u9001\u65f6\uff0c<code>TA<\/code>\u5b57\u6bb5\u4e3a\u53d1\u9001\u8be5\u5e27\u7684<code>STA<\/code>\u7684<code>MAC<\/code>\u5730\u5740<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u65e0\u7ade\u4e89\u7ed3\u675f + \u786e\u8ba4\u5e27(CF-End+CF-Ack)(\u5df2\u5e9f\u5f03)<\/h2>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u7b14\u8005\u6ce8\uff1a<strong>CF-End+CF-Ack\u5e27\u5df2\u5e9f\u5f03\uff0c\u8be6\u60c5\u89c1IEEE 802.11-2016\u6587\u68639.3.1.7<\/strong><\/p>\n<\/blockquote>\n\n\n\n<p><code>CF-End + CF-Ack<\/code>\u662f\u4e00\u79cd\u590d\u5408\u63a7\u5236\u5e27\uff0c\u5728\u65e0\u7ade\u4e89\u5468\u671f(<code>CFP<\/code>)\u7ed3\u675f\u65f6\uff0c\u65e2\u786e\u8ba4\u4e0a\u4e00\u4e2a\u6765\u81ea<code>STA<\/code>\u7684\u6570\u636e\u5e27\uff0c\u53c8\u901a\u77e5\u6240\u6709\u7ad9\u70b9<code>CFP<\/code>\u5df2\u7ec8\u6b62<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">CF-End\u5e27\u548cCF-End + CF-Ack\u5e27\u7684\u533a\u522b<\/h3>\n\n\n\n<p><code>CF-End + CF-Ack<\/code>\u5e27\u662f<code>CF-End<\/code>\u5e27\u7684\u4e00\u79cd\u53d8\u4f53\uff0c\u5b83\u5728\u7ed3\u675f<code>CFP<\/code>\u7684\u540c\u65f6\uff0c\u786e\u8ba4\u4e0a\u4e00\u4e2a\u63a5\u6536\u5230\u7684\u6570\u636e\u5e27(\u7c7b\u4f3c<code>ACK<\/code>)\uff0c\u5728 CFP \u6700\u540e\u4e00\u6b21\u4f20\u8f93\u540e\uff0c\u65e2\u7ed3\u675f\u5468\u671f\u53c8\u5b8c\u6210\u786e\u8ba4\uff0c\u51cf\u5c11\u5e27\u4ea4\u6362\u6b21\u6570<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">CF-End + CF-Ack\u5e27\u7ed3\u6784<\/h3>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/www.garfield-blog.top\/wp-content\/uploads\/2025\/12\/CF-End-frame-format.jpg'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1003\" height=\"303\" data-original=\"https:\/\/www.garfield-blog.top\/wp-content\/uploads\/2025\/12\/CF-End-frame-format.jpg\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-453\"  sizes=\"auto, (max-width: 1003px) 100vw, 1003px\" \/><\/div><\/figure>\n\n\n\n<p><code>BSSID<\/code>\u5b57\u6bb5\u662f<code>AP<\/code>\u4e2d\u6240\u5305\u542b\u7684<code>STA<\/code>\u7684\u5730\u5740\u3002<code>RA<\/code>\u5b57\u6bb5\u4e3a\u5e7f\u64ad\u7ec4\u5730\u5740\u3002<code>Duration<\/code>\u5b57\u6bb5\u88ab\u8bbe\u4e3a<code>0<\/code><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u53c2\u8003\u6587\u6863<\/h2>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u300a\u65e0\u7ebf\u5c40\u57df\u7f51\u6743\u5a01\u6307\u5357 \u7b2c\u4e94\u7248\u300b<\/p>\n\n\n\n<p><a href=\"https:\/\/github.com\/Garfield-1\/Books\/blob\/master\/11_802.11\u534f\u8bae\u89c4\u8303\/80211-2016.pdf\">80211-2016\u89c4\u8303<\/a><\/p>\n<\/blockquote>\n","protected":false},"excerpt":{"rendered":"<p>\u6982\u8ff0 802.11\u63a7\u5236\u5e27\u534f\u52a9\u4f20\u8f93\u6570\u636e\u5e27\uff0c\u4ee5\u67d0\u4e2a\u57fa\u672c\u901f\u7387\u53d1\u9001\u3002\u63a7\u5236\u5e27\u7528\u4e8e\u6e05\u9664\u4fe1\u9053\u3001\u83b7\u53d6\u4fe1\u9053\u5e76\u63d0\u4f9b\u5355\u64ad\u5e27\u786e\u8ba4\u3002\u63a7\u5236 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[9,11],"tags":[],"class_list":["post-448","post","type-post","status-publish","format-standard","hentry","category-wifi","category-11"],"_links":{"self":[{"href":"https:\/\/www.garfield-blog.top\/index.php?rest_route=\/wp\/v2\/posts\/448","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.garfield-blog.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.garfield-blog.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.garfield-blog.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.garfield-blog.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=448"}],"version-history":[{"count":3,"href":"https:\/\/www.garfield-blog.top\/index.php?rest_route=\/wp\/v2\/posts\/448\/revisions"}],"predecessor-version":[{"id":486,"href":"https:\/\/www.garfield-blog.top\/index.php?rest_route=\/wp\/v2\/posts\/448\/revisions\/486"}],"wp:attachment":[{"href":"https:\/\/www.garfield-blog.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=448"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.garfield-blog.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=448"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.garfield-blog.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=448"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}