{"id":22,"date":"2019-12-23T11:47:08","date_gmt":"2019-12-23T10:47:08","guid":{"rendered":"https:\/\/blogg.uit.no\/anb043\/?p=22"},"modified":"2020-02-13T16:15:35","modified_gmt":"2020-02-13T15:15:35","slug":"tuning-ap-transmit-power-in-dense-areas","status":"publish","type":"post","link":"https:\/\/blogg.uit.no\/anb043\/2019\/12\/23\/tuning-ap-transmit-power-in-dense-areas\/","title":{"rendered":"Tuning AP Transmit Power in Dense Areas, Tabletten"},"content":{"rendered":"<p>Tabletten (like in &#8220;a small, solid piece of medicine&#8221;) is an oval, 159-seat auditorium mostly used\u00a0 by the Department of Pharmacy. Wifi service is provided through four omni APs in the amphi shaped room, where ceiling height varies from normal to one-and-a half (a picture taken from the lower, left-hand entrance is included at the end).<\/p>\n<p><img fetchpriority=\"high\" fetchpriority=\"high\" decoding=\"async\" class=\"alignnone size-medium wp-image-29\" src=\"https:\/\/blogg.uit.no\/anb043\/wp-content\/uploads\/sites\/172\/2019\/12\/CPI-273x300.png\" alt=\"\" width=\"273\" height=\"300\" srcset=\"https:\/\/blogg.uit.no\/anb043\/wp-content\/uploads\/sites\/172\/2019\/12\/CPI-273x300.png 273w, https:\/\/blogg.uit.no\/anb043\/wp-content\/uploads\/sites\/172\/2019\/12\/CPI.png 636w\" sizes=\"(max-width: 273px) 100vw, 273px\" \/><\/p>\n<p>In this environment, RRM did a poor job in spreading clients evenly across the APs: three of four clients would associate to a single AP, and the three other APs were idle in comparison.\u00a0 Far from an optimal utilization of resources, but it&#8217;s hardly a surprise \u2013 client distribution isn&#8217;t part of the algorithmic basis of Cisco&#8217;s RRM.<\/p>\n<p><img decoding=\"async\" class=\"alignnone size-medium wp-image-32\" src=\"https:\/\/blogg.uit.no\/anb043\/wp-content\/uploads\/sites\/172\/2019\/12\/20191203-300x180.png\" alt=\"\" width=\"300\" height=\"180\" srcset=\"https:\/\/blogg.uit.no\/anb043\/wp-content\/uploads\/sites\/172\/2019\/12\/20191203-300x180.png 300w, https:\/\/blogg.uit.no\/anb043\/wp-content\/uploads\/sites\/172\/2019\/12\/20191203-768x462.png 768w, https:\/\/blogg.uit.no\/anb043\/wp-content\/uploads\/sites\/172\/2019\/12\/20191203.png 988w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/p>\n<p>Turning over to static power management, and a period with power level adjustments followed, gradually levelling out the client distribution.<\/p>\n<p><img decoding=\"async\" class=\"alignnone size-medium wp-image-34\" src=\"https:\/\/blogg.uit.no\/anb043\/wp-content\/uploads\/sites\/172\/2019\/12\/20191210-20200210-300x212.png\" alt=\"\" width=\"300\" height=\"212\" srcset=\"https:\/\/blogg.uit.no\/anb043\/wp-content\/uploads\/sites\/172\/2019\/12\/20191210-20200210-300x212.png 300w, https:\/\/blogg.uit.no\/anb043\/wp-content\/uploads\/sites\/172\/2019\/12\/20191210-20200210-768x543.png 768w, https:\/\/blogg.uit.no\/anb043\/wp-content\/uploads\/sites\/172\/2019\/12\/20191210-20200210-1024x724.png 1024w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/p>\n<p>This table shows the 5GHz AP radio power settings on the graphed dates (in dBm):<br \/>\n<img loading=\"lazy\" loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-35\" src=\"https:\/\/blogg.uit.no\/anb043\/wp-content\/uploads\/sites\/172\/2019\/12\/powerLevels-300x95.png\" alt=\"\" width=\"300\" height=\"95\" srcset=\"https:\/\/blogg.uit.no\/anb043\/wp-content\/uploads\/sites\/172\/2019\/12\/powerLevels-300x95.png 300w, https:\/\/blogg.uit.no\/anb043\/wp-content\/uploads\/sites\/172\/2019\/12\/powerLevels.png 698w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/p>\n<p>The current settings certainly don&#8217;t guarantee an equal number of clients on all APs, as illustrated in the graph below, but there&#8217;s a sense of symmetry around the 30-client line. The abrupt changes (vertical lines) coincide with lecture breaks, but I have no data to explain the &#8220;mirroring&#8221; of the blue and gray lines.<\/p>\n<p><img loading=\"lazy\" loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-33\" src=\"https:\/\/blogg.uit.no\/anb043\/wp-content\/uploads\/sites\/172\/2019\/12\/20200212-300x179.png\" alt=\"\" width=\"300\" height=\"179\" srcset=\"https:\/\/blogg.uit.no\/anb043\/wp-content\/uploads\/sites\/172\/2019\/12\/20200212-300x179.png 300w, https:\/\/blogg.uit.no\/anb043\/wp-content\/uploads\/sites\/172\/2019\/12\/20200212-768x459.png 768w, https:\/\/blogg.uit.no\/anb043\/wp-content\/uploads\/sites\/172\/2019\/12\/20200212-1024x612.png 1024w, https:\/\/blogg.uit.no\/anb043\/wp-content\/uploads\/sites\/172\/2019\/12\/20200212.png 1067w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/p>\n<p><img loading=\"lazy\" loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-30\" src=\"https:\/\/blogg.uit.no\/anb043\/wp-content\/uploads\/sites\/172\/2019\/12\/IMG_2183-300x225.jpg\" alt=\"\" width=\"300\" height=\"225\" srcset=\"https:\/\/blogg.uit.no\/anb043\/wp-content\/uploads\/sites\/172\/2019\/12\/IMG_2183-300x225.jpg 300w, https:\/\/blogg.uit.no\/anb043\/wp-content\/uploads\/sites\/172\/2019\/12\/IMG_2183-768x576.jpg 768w, https:\/\/blogg.uit.no\/anb043\/wp-content\/uploads\/sites\/172\/2019\/12\/IMG_2183-1024x768.jpg 1024w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tabletten (like in &#8220;a small, solid piece of medicine&#8221;) is an oval, 159-seat auditorium mostly used\u00a0 by the Department of Pharmacy. Wifi service is provided through four omni APs in the amphi shaped room, where ceiling height varies from normal to one-and-a half (a picture taken from the lower, left-hand entrance is included at the &hellip; <a href=\"https:\/\/blogg.uit.no\/anb043\/2019\/12\/23\/tuning-ap-transmit-power-in-dense-areas\/\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">Tuning AP Transmit Power in Dense Areas, Tabletten<\/span> <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":287,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":true,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-22","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"featured_image_src":"","featured_image_src_square":false,"author_info":{"display_name":"Anders Baardsgaard","author_link":"https:\/\/blogg.uit.no\/anb043\/author\/anders-baardsgaard\/"},"rbea_author_info":{"display_name":"Anders Baardsgaard","author_link":"https:\/\/blogg.uit.no\/anb043\/author\/anders-baardsgaard\/"},"rbea_excerpt_info":"Tabletten (like in &#8220;a small, solid piece of medicine&#8221;) is an oval, 159-seat auditorium mostly used\u00a0 by the Department of Pharmacy. Wifi service is provided through four omni APs in the amphi shaped room, where ceiling height varies from normal to one-and-a half (a picture taken from the lower, left-hand entrance is included at the &hellip; <a href=\"https:\/\/blogg.uit.no\/anb043\/2019\/12\/23\/tuning-ap-transmit-power-in-dense-areas\/\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">Tuning AP Transmit Power in Dense Areas, Tabletten<\/span> <span class=\"meta-nav\">&rarr;<\/span><\/a>","category_list":"<a href=\"https:\/\/blogg.uit.no\/anb043\/category\/uncategorized\/\" rel=\"category tag\">Uncategorized<\/a>","comments_num":"0 comments","_links":{"self":[{"href":"https:\/\/blogg.uit.no\/anb043\/wp-json\/wp\/v2\/posts\/22","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blogg.uit.no\/anb043\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blogg.uit.no\/anb043\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blogg.uit.no\/anb043\/wp-json\/wp\/v2\/users\/287"}],"replies":[{"embeddable":true,"href":"https:\/\/blogg.uit.no\/anb043\/wp-json\/wp\/v2\/comments?post=22"}],"version-history":[{"count":14,"href":"https:\/\/blogg.uit.no\/anb043\/wp-json\/wp\/v2\/posts\/22\/revisions"}],"predecessor-version":[{"id":43,"href":"https:\/\/blogg.uit.no\/anb043\/wp-json\/wp\/v2\/posts\/22\/revisions\/43"}],"wp:attachment":[{"href":"https:\/\/blogg.uit.no\/anb043\/wp-json\/wp\/v2\/media?parent=22"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blogg.uit.no\/anb043\/wp-json\/wp\/v2\/categories?post=22"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blogg.uit.no\/anb043\/wp-json\/wp\/v2\/tags?post=22"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}