\u5e78\u8fd0\u7684\u662f\uff0c\u8fd9\u662f\u88ab\u8bef\u5bfc\u6216\u5b8c\u5168\u9519\u8bef\u7684WiFi \u201c\u5e38\u8bc6\u201d\u7684\u5b8c\u7f8e\u793a\u4f8b\u3002
See, this particular client had an on-going Wi-Fi connection issue. Lack of performance, temporary disconnections, the works. They are using rather old Cisco AP1602 which are not configured for 5GHz, for some reason. So 2.4GHz it is.
The thing is that this area, like many in Shanghai, is absolutely swamped with radio signals. Most of them emitting on the same 2.4GHz band. To give you an idea, Ekahau site Survey<\/a> shows that 97.8% of the surface was covered by 7 radios or more. As crowded as a the People Square metro station at rush hour!<\/p>\n\n\n\n
![\"WiFi](\"http:\/\/new.netk5.com.cn\/wp-content\/uploads\/2019\/02\/Image-2019-02-07-at-4.16.36-PM.png\")
\u8fd9\u4e9b\u65e0\u7ebf\u7535\u5927\u90e8\u5206\u5728\u901a\u9053 1\u30016 \u6216 11 \u4e0a\u53d1\u5c04\uff082.4GHz WiFi \u4e3a\u8bbe\u5907\u63d0\u4f9b\u591a\u8fbe 13 \u4e2a\u901a\u9053\u8fdb\u884c\u901a\u4fe1\u3002\uff09<\/p>\n\n\n\n
\u5f53\u4e00\u5207\u53d8\u5f97\u62e5\u6324\u65f6<\/h2>\n\n\n\n
\u7f51\u7edc\u7ba1\u7406\u5458\u786e\u5b9e\u6b63\u786e\u8bc6\u522b\u4e86\u8be5\u95ee\u9898\u3002\u4ed6\u77e5\u9053\u5728\u540c\u4e00\u4fe1\u9053\u4e0a\u6709\u592a\u591a\u65e0\u7ebf\u7535\u4f1a\u5bfc\u81f4 \u540c\u4fe1\u9053\u5e72\u6270 (CCI)<\/strong>\uff0c\u5e76\u53ef\u80fd\u5f71\u54cd\u6027\u80fd\u3002\u56e0\u6b64\uff0c\u4ed6\u6309\u7167\u903b\u8f91\u8fdb\u884c\u4e86\u64cd\u4f5c\uff1a\u5207\u6362\u5230\u4e0d\u90a3\u4e48\u62e5\u6324\u7684\u9891\u9053\uff0c\u5373\u9891\u9053 2 \u548c 3\u3002 \u4f60\u8bf4\u7684\u201c\u4e0d\u90a3\u4e48\u5feb\u201d\u610f\u5473\u7740\u4ec0\u4e48\uff0c\u4f7f\u7528\u4e0d\u90a3\u4e48\u62e5\u6324\u7684\u9891\u9053\u600e\u4e48\u4f1a\u6bd4\u4e0e\u5927\u91cf\u4f60\u751a\u81f3\u4e0d\u8ba4\u8bc6\u7684\u4eba\u5206\u4eab\u4e00\u4e2a\u9891\u9053\u66f4\u7cdf\u7cd5\u5462\uff1f \u73b0\u5728\u660e\u767d\u4e86\u5417\uff1f\u901a\u9053 1 \u5b9e\u9645\u4e0a\u4e0e\u901a\u9053 2\u30013\u30014 \u548c 5 \u91cd\u53e0\u3002\u56e0\u6b64\u4e0b\u4e00\u4e2a\u975e\u91cd\u53e0\uff08\u4e0e\u901a\u9053 1\uff09\u901a\u9053\u662f\u901a\u9053 6\uff0c\u5b83\u4e0e 2\u30013\u30014\u30015\u30017\u30018\u30019 \u548c 10 \u91cd\u53e0\uff0c\u7136\u540e\u662f 11\u4e0e 6 \u4e0d\u91cd\u53e0\u3002 <\/p>\n\n\n\n \u8fd9\u5c31\u662f\u4e3a\u4ec0\u4e48\u901a\u9053 1\u30016 \u548c 11 \u5982\u6b64\u5e38\u7528\u7684\u539f\u56e0\uff1a\u4f7f\u7528\u5b83\u4eec\u53ef\u4ee5\u4e3a\u60a8\u63d0\u4f9b\u6700\u5927\u6570\u91cf\u7684\u4e0d\u76f8\u4e92\u91cd\u53e0\u7684\u901a\u9053\u3002 \u6240\u4ee5\u6211\u4eec\u7684\u7ba1\u7406\u5458\u6b63\u786e\u5730\u8bc6\u522b\u4e86\u4ed6\u7684\u95ee\u9898\uff0c\u4f46\u4ed6\u7684\u201c\u5e38\u8bc6\u201d\u89e3\u51b3\u65b9\u6848\u5b9e\u9645\u4e0a\u8ba9\u4e8b\u60c5\u53d8\u5f97\u2026\u2026\u66f4\u7cdf\u3002\u73b0\u5728\u6211\u8981\u5b8c\u5168\u627f\u8ba4\uff1a\u6211\u8fc7\u53bb\u4e5f\u8fd9\u6837\u505a\u8fc7\uff01\u00a0 \u6700\u8fd1\uff0c\u6211\u4ee5\u5b98\u65b9\u8ba4\u8bc1\u7684 Ekahau \u52d8\u6d4b\u5de5\u7a0b\u5e08\u7684\u8eab\u4efd\u8fdb\u884c\u4e86\u7b2c\u4e00\u6b21\u73b0\u573a\u52d8\u6d4b\u3002\u867d\u7136\u6211\u8fc7\u53bb\u8fdb\u884c\u8fc7 WiFi \u8c03\u67e5\uff0c\u4f46\u6211\u73b0\u5728\u610f\u8bc6\u5230\u5173\u6ce8\u8986\u76d6\u8303\u56f4\u53ea\u662f\u5176\u4e2d\u7684\u4e00\u90e8\u5206\u3002<\/p>","protected":false},"author":1,"featured_media":593,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_seopress_robots_primary_cat":"none","_seopress_titles_title":"%%post_title%% %%sep%% %%sitetitle%%","_seopress_titles_desc":"Recently, I've run one of my first site surveys as an officially certified Ekahau Survey Engineer. I realized that coverage is just part of the equation.","_seopress_robots_index":"","_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_kad_post_classname":"","footnotes":""},"categories":[3,4],"tags":[6,7,5],"class_list":["post-508","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-network","category-wifi","tag-ekahau","tag-survey","tag-wifi"],"brizy_media":[],"_links":{"self":[{"href":"https:\/\/netk5.com.cn\/zh\/wp-json\/wp\/v2\/posts\/508","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/netk5.com.cn\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/netk5.com.cn\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/netk5.com.cn\/zh\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/netk5.com.cn\/zh\/wp-json\/wp\/v2\/comments?post=508"}],"version-history":[{"count":14,"href":"https:\/\/netk5.com.cn\/zh\/wp-json\/wp\/v2\/posts\/508\/revisions"}],"predecessor-version":[{"id":31925,"href":"https:\/\/netk5.com.cn\/zh\/wp-json\/wp\/v2\/posts\/508\/revisions\/31925"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/netk5.com.cn\/zh\/wp-json\/wp\/v2\/media\/593"}],"wp:attachment":[{"href":"https:\/\/netk5.com.cn\/zh\/wp-json\/wp\/v2\/media?parent=508"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/netk5.com.cn\/zh\/wp-json\/wp\/v2\/categories?post=508"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/netk5.com.cn\/zh\/wp-json\/wp\/v2\/tags?post=508"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\u8fd9\u662f\u4e2a\u673a\u667a\u7684\u7684\u60f3\u6cd5\uff0c\u5bf9\u5427\uff1f\u6ca1\u90a3\u4e48\u5feb\u2026 <\/p>\n\n\n\n
\u4e0d\u5e78\u7684\u662f\uff0c\u5927\u591a\u6570\u7ba1\u7406\u5458\u5c06\u65e0\u7ebf\u7535\u8bbe\u7f6e\u4e3a 2.4GHz WiFi \u7684\u9891\u9053 1\u30016 \u6216 11 \u662f\u6709\u539f\u56e0\u7684\u3002\u90a3\u662f\u56e0\u4e3a\u6e20\u9053\u786e\u5b9e\u91cd\u53e0\u3002\u5b83\u4eec\u5e76\u4e0d\u50cf\u4eba\u4eec\u60f3\u8c61\u7684\u90a3\u6837\u6574\u9f50\u5730\u5206\u5f00\u3002\u5b9e\u9645\u4e0a\uff0c\u6bcf\u4e2a\u9891\u9053\u5927\u7ea6\u6709 20MHz \u5bbd\uff0c\u5e76\u4e14\u5728\u524d\u4e00\u4e2a\u9891\u9053\u4e4b\u540e 5MHz \u5f00\u59cb\u3002
\u8ba9\u6211\u4eec\u770b\u4e00\u5f20\u56fe\uff1a
<\/p>\n\n\n\n![\"WiFi](\"http:\/\/new.netk5.com.cn\/wp-content\/uploads\/2019\/02\/WiFi-Channel-Overlap-1-1024x314.jpg\")
\u91cd\u53e0<\/h2>\n\n\n\n
\u4f46\u8fd9\u5e76\u4e0d\u80fd\u89e3\u91ca\u4e3a\u4ec0\u4e48\u4f7f\u7528 2\u30013 \u6216 7 \u4e0d\u597d\uff0c\u5bf9\u5427\uff1f
\u8fd9\u5c31\u662f \u76f8\u90bb\u4fe1\u9053\u5e72\u6270 (ACI)<\/strong> \u7684\u7528\u6b66\u4e4b\u5730\u3002 \u5982\u679c\u66f4\u597d\u5730\u907f\u514d CCI\uff0c\u5219 ACI \u4f1a\u66f4\u7cdf\u3002
\u6b63\u5982\u6211\u4eec\u6240\u89c1\uff0c\u6211\u4eec\u53ea\u80fd\u4f9d\u9760 2.4GHz \u4e0a\u7684 3 \u4e2a\u975e\u91cd\u53e0\u4fe1\u9053\u3002\u81f3\u5c11\u53ef\u4ee5\u8bf4\uff0c\u8fd9\u5e76\u4e0d\u591a\u3002\u6240\u4ee5\u5728\u4efb\u4f55\u76f8\u5f53\u5927\u7684\u73af\u5883\u4e2d\u90fd\u4f1a\u53d1\u751f\u91cd\u53e0\u3002\u4f46\u8fd9\u6216\u591a\u6216\u5c11\u662f\u53ef\u4ee5\u7684\uff0c\u56e0\u4e3a\u5f53 AP \u4f4d\u4e8e\u540c\u4e00\u4fe1\u9053\u4e0a\u65f6\uff0c\u5b83\u4eec\u53ef\u4ee5\u5728\u67d0\u79cd\u7a0b\u5ea6\u4e0a\u540c\u6b65\u5b83\u4eec\u7684\u53d1\u5c04\u3002\u4ed6\u4eec\u4f1a\u5728\u4ed6\u4eec\u7684\u9891\u9053\u4e0a\u6536\u542c\uff0c\u5982\u679c\u6ca1\u6709\u5176\u4ed6\u4eba\u8fd9\u6837\u505a\uff0c\u4ed6\u4eec\u5c31\u4f1a\u53d1\u51fa\u58f0\u97f3\u3002\u6240\u4ee5\u53ea\u8981\u6bcf\u4e2a\u4eba\u90fd\u5728\u540c\u4e00\u9875\u9762\u4e0a\uff0c\u53ef\u4ee5\u8fd9\u4e48\u8bf4\uff0c\u4e00\u5207\u90fd\u5f88\u597d\u3002\u51fa\u73b0\u62e5\u6324\uff0c\u662f\u7684\uff0c\u4f46\u4e5f\u8fd8\u597d\u3002
\u4f46\u662f\uff0c\u5982\u679c\u4e00\u4e2a AP \u5728\u901a\u9053 1 \u4e0a\uff0c\u4e0b\u4e00\u4e2a\u5728\u901a\u9053 2 \u4e0a\uff0c\u5b83\u4eec\u7684\u4fe1\u53f7\u4f1a\u6df7\u5408\u5e76\u4ea7\u751f\u5e72\u6270\uff0c\u4f46\u5b83\u4eec\u5c06\u65e0\u6cd5\u6b63\u786e\u540c\u6b65\u3002\u5982\u679c\u6709\u4eba\u5728\u901a\u9053 1 \u4e0a\u53d1\u5c04\uff0c AP1 \u4f1a\u4fa6\u542c\uff0c\u5373\u4f7f\u540c\u65f6 AP2 \u4e5f\u5728\u901a\u9053 2 \u4e0a\u53d1\u5c04\uff0c\u5b83\u4e5f\u4f1a\u8ba9\u4e00\u5207\u5f88\u6e05\u695a\u3002\u60a8\u4f1a\u5f97\u5230\u4e24\u4e2a\u6df7\u5408\u4fe1\u53f7\u3001\u5927\u91cf\u566a\u97f3\u548c\u7cdf\u7cd5\u7684\u6d41\u91cf\u3002
\u6240\u4ee5\u57fa\u672c\u4e0a\uff0c\u4f60\u53ef\u4ee5\u8fd9\u6837\u60f3\u8c61\uff1a<\/p>\n\n\n\n\n
\u4f7f\u7528 Ekahau \u8fdb\u884c\u9884\u6d4b\u6027\u89c4\u5212<\/h2>\n\n\n\n
\u4e3a\u907f\u514d\u6b64\u7c7b\u95ee\u9898\uff0c\u4f7f\u7528 Ekahau \u73b0\u573a\u8c03\u67e5<\/strong><\/a> \u6267\u884c\u9884\u6d4b\u6027\u89c4\u5212\u5c06\u786e\u4fdd\u60a8\u6b63\u786e\u8bbe\u7f6e\u6e20\u9053\u3001\u6700\u5c0f\u5316 CCI \u5e76\u5b8c\u5168\u907f\u514d ACI\u3002
<\/p>","protected":false},"excerpt":{"rendered":"