{"id":10150,"date":"2021-03-10T22:27:45","date_gmt":"2021-03-10T21:27:45","guid":{"rendered":"https:\/\/benjamin-tews.de\/?p=10150"},"modified":"2022-03-22T15:06:42","modified_gmt":"2022-03-22T14:06:42","slug":"dont-place-aps-on-walls","status":"publish","type":"post","link":"https:\/\/wireless-solutions.net\/?p=10150","title":{"rendered":"Don&#8217;t place APs on Walls"},"content":{"rendered":"<p><strong>Access Points an S\u00e4ulen, Pfeilern, W\u00e4nden und Co. sind g\u00e4ngige Alternativen zur Deckenmontage&#8230;<\/strong><\/p>\n<p>Sichtbeton, Lamellendecken und andere &#8220;Kunst-am-Bau&#8221; oder &#8220;Design&#8221; Elemente in Neubauten oder einfach die vergessene Dose an der Decke bzw. der st\u00f6rende Kabelkanal sind oft aufgef\u00fchrte Argumente, um (bereits gekaufte) APs doch nicht an die Decken zu h\u00e4ngen. Also ab damit &#8211; im besten Fall mit Winkel &#8211; an die Wand.<\/p>\n<p>Nur gibt es hierbei mehrere Probleme:<\/p>\n<ul>\n<li>i.d.R. sind APs f\u00fcr Deckenmontage designt<\/li>\n<li>Polarisation spielt eine wichtige Rolle beim Senden\/Empfangen<\/li>\n<li>S\u00e4ulen und W\u00e4nde d\u00e4mpfen zus\u00e4tzlich<\/li>\n<li>Hidden Node Problem*<\/li>\n<\/ul>\n<p style=\"text-align: right;\"><em><small>*Clients sehen sich gegenseitig nicht via CCA, senden gleichzeitig und es kommt zu Kollisionen<\/small><\/em><\/p>\n<p>Folgende Simulationen sollen einen ersten Eindruck geben was passiert, wenn man ceilling mount APs an eine Wand h\u00e4ngt. In unserem Beispiel ein Aruba AP 535.<div class=\"ult-spacer spacer-69fca65c32ab4\" data-id=\"69fca65c32ab4\" data-height=\"10\" data-height-mobile=\"10\" data-height-tab=\"10\" data-height-tab-portrait=\"\" data-height-mobile-landscape=\"\" style=\"clear:both;display:block;\"><\/div>[vc_hoverbox image=&#8221;10151&#8243; primary_title=&#8221;&#8221; primary_title_font_container=&#8221;font_size:24&#8243; primary_title_use_theme_fonts=&#8221;yes&#8221; hover_title=&#8221;ceilling mount angle 0\u00b0&#8221; hover_title_font_container=&#8221;font_size:24&#8243; hover_title_use_theme_fonts=&#8221;yes&#8221; shape=&#8221;square&#8221; el_width=&#8221;60&#8243; use_custom_fonts_primary_title=&#8221;true&#8221; use_custom_fonts_hover_title=&#8221;true&#8221;]<span style=\"color: #000000;\">&#8211; normale Ausbreitung<br \/>\n<\/span><span style=\"color: #000000;\">&#8211; homogenes Feld mit normaler Polarisation<br \/>\n<\/span><span style=\"color: #000000;\">&#8211; beste L\u00f6sung\u00a0<\/span>[\/vc_hoverbox]<div class=\"ult-spacer spacer-69fca65c32af0\" data-id=\"69fca65c32af0\" data-height=\"10\" data-height-mobile=\"10\" data-height-tab=\"10\" data-height-tab-portrait=\"\" data-height-mobile-landscape=\"\" style=\"clear:both;display:block;\"><\/div>[vc_row][vc_column][vc_hoverbox image=&#8221;10154&#8243; primary_title=&#8221;&#8221; primary_title_font_container=&#8221;font_size:24&#8243; primary_title_use_theme_fonts=&#8221;yes&#8221; hover_title=&#8221;wall mount angle 90\u00b0&#8221; hover_title_font_container=&#8221;font_size:24&#8243; hover_title_use_theme_fonts=&#8221;yes&#8221; shape=&#8221;square&#8221; el_width=&#8221;60&#8243; use_custom_fonts_primary_title=&#8221;true&#8221; use_custom_fonts_hover_title=&#8221;true&#8221;]- deutlich weniger Abdeckung<br \/>\n&#8211; inhomogenes assymmetrisches Feld, komplexes \u00dcberdecken der Zellen<br \/>\n&#8211; durch Drehung der Polarisation von 90\u00b0 ca. 5dB\u00a0<img decoding=\"async\" class=\"emoticon emoticon-warning\" src=\"https:\/\/confluence.cc.fraunhofer.de\/s\/en_GB\/7601\/d9a7d86ddd6172b1b5a38b9e600c8b90c362def3\/_\/images\/icons\/emoticons\/warning.png\" alt=\"(warning)\" data-emoticon-name=\"warning\" \/> weniger Signalst\u00e4rke<br \/>\n&#8211; durch Drehung hohe Deckendurchdringung (was nicht gew\u00fcnscht ist)[\/vc_hoverbox][\/vc_column][\/vc_row][vc_row][vc_column]<div class=\"ult-spacer spacer-69fca65c32b17\" data-id=\"69fca65c32b17\" data-height=\"10\" data-height-mobile=\"10\" data-height-tab=\"10\" data-height-tab-portrait=\"\" data-height-mobile-landscape=\"\" style=\"clear:both;display:block;\"><\/div>[vc_hoverbox image=&#8221;10155&#8243; primary_title=&#8221;&#8221; primary_title_font_container=&#8221;font_size:24&#8243; primary_title_use_theme_fonts=&#8221;yes&#8221; hover_title=&#8221;bracket mount angle 0\u00b0&#8221; hover_title_font_container=&#8221;font_size:24&#8243; hover_title_use_theme_fonts=&#8221;yes&#8221; shape=&#8221;square&#8221; el_width=&#8221;60&#8243; use_custom_fonts_primary_title=&#8221;true&#8221; use_custom_fonts_hover_title=&#8221;true&#8221;]- geringe Abdeckung im R\u00fccken &#8211; Funkschatten<br \/>\n&#8211; normale Polarisation<br \/>\n&#8211; akzeptable L\u00f6sung[\/vc_hoverbox]<div class=\"ult-spacer spacer-69fca65c32b3c\" data-id=\"69fca65c32b3c\" data-height=\"10\" data-height-mobile=\"10\" data-height-tab=\"10\" data-height-tab-portrait=\"\" data-height-mobile-landscape=\"\" style=\"clear:both;display:block;\"><\/div>[vc_hoverbox image=&#8221;10156&#8243; primary_title=&#8221;&#8221; primary_title_font_container=&#8221;font_size:24&#8243; primary_title_use_theme_fonts=&#8221;yes&#8221; hover_title=&#8221;wall mount obstacle angle 90\u00b0&#8221; hover_title_font_container=&#8221;font_size:24&#8243; hover_title_use_theme_fonts=&#8221;yes&#8221; shape=&#8221;square&#8221; el_width=&#8221;60&#8243; use_custom_fonts_primary_title=&#8221;true&#8221; use_custom_fonts_hover_title=&#8221;true&#8221;]- Hindernis im R\u00fccken erzeugt Funkschatten<br \/>\n&#8211; gute \u00dcberdeckung f\u00fcr 100% Coverage nahezu nicht machbar<br \/>\n&#8211; hohe Deckendurchdringung (nicht gew\u00fcnscht!)<br \/>\n&#8211; L\u00f6sung nicht akzeptabel[\/vc_hoverbox][\/vc_column][\/vc_row]<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Access Points an S\u00e4ulen, Pfeilern, W\u00e4nden und Co. sind g\u00e4ngige Alternativen zur Deckenmontage&#8230; Sichtbeton, Lamellendecken und andere &#8220;Kunst-am-Bau&#8221; oder &#8220;Design&#8221; Elemente in Neubauten oder einfach die vergessene Dose an der Decke bzw. der st\u00f6rende Kabelkanal sind oft aufgef\u00fchrte Argumente, um (bereits gekaufte) APs doch nicht an die Decken zu h\u00e4ngen. Also ab damit &#8211; im [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[],"class_list":["post-10150","post","type-post","status-publish","format-standard","hentry","category-wifi"],"_links":{"self":[{"href":"https:\/\/wireless-solutions.net\/index.php?rest_route=\/wp\/v2\/posts\/10150","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wireless-solutions.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wireless-solutions.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wireless-solutions.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/wireless-solutions.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=10150"}],"version-history":[{"count":20,"href":"https:\/\/wireless-solutions.net\/index.php?rest_route=\/wp\/v2\/posts\/10150\/revisions"}],"predecessor-version":[{"id":11597,"href":"https:\/\/wireless-solutions.net\/index.php?rest_route=\/wp\/v2\/posts\/10150\/revisions\/11597"}],"wp:attachment":[{"href":"https:\/\/wireless-solutions.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=10150"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wireless-solutions.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=10150"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wireless-solutions.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=10150"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}