tag:blogger.com,1999:blog-1988432060681510848.post6503398495783570330..comments2024-03-25T23:51:47.067-05:00Comments on Revolution Wi-Fi: Wi-Fi Site-Surveying 101Andrew von Nagyhttp://www.blogger.com/profile/12658799453646609565noreply@blogger.comBlogger8125tag:blogger.com,1999:blog-1988432060681510848.post-81233098320732062612013-10-05T16:45:13.441-05:002013-10-05T16:45:13.441-05:00I collect data points around every 3 meters for mo...I collect data points around every 3 meters for most surveys. Taking measurements every 1 meter might be slightly more accurate, but its a large tradeoff in time required! And indoors, you're likely to have enough multipath reflection that signals will vary enough eliminating any accuracy gain.<br /><br />As for how the Wi-Fi card measures the signal strength, that is an electrical engineering question. I'm not exactly sure to be honest, but you can read up on the components the Wi-Fi signal passes through at <a href="http://blogs.aerohive.com/blog/the-wi-fi-security-blog/extended-battery-life-with-80211ac" rel="nofollow">this blog post by Matthew Gast</a>.<br /><br />There are plenty of Wi-Fi experts sharing their experiences on the Internet. I used to have a blogroll on the side of my website, listing the other blogs that I follow... until Google Reader shutdown. I'll look at manually re-creating that list and putting it back up.<br /><br />Cheers,<br />AndrewAndrew von Nagyhttps://www.blogger.com/profile/12658799453646609565noreply@blogger.comtag:blogger.com,1999:blog-1988432060681510848.post-17021659327768423122013-09-24T15:31:04.577-05:002013-09-24T15:31:04.577-05:00Hi Andrew,
If you are doing site survey this way.....Hi Andrew,<br />If you are doing site survey this way... how long does it take for you to plan location for 1 AP?<br />And are you collecting each survey point at minimum distance of 3 metres? I collect each data point at the distance 1metre or less...<br />And could you explain... how my device WiFi card knows, the RSSI value of the management beacon frame? How it senses that? <br /><br />Why the **** on Internet there is not anything like that? I can't understand why WiFi experts do not share their experiences, as you are doing this?<br /><br />Thanks for your awesome blog... just don't stop please... You are distinguished and unique.Anonymoushttps://www.blogger.com/profile/15283683196024888027noreply@blogger.comtag:blogger.com,1999:blog-1988432060681510848.post-67369449198087557372013-08-29T10:01:42.154-05:002013-08-29T10:01:42.154-05:00I could see adjusting the beacon interval if you a...I could see adjusting the beacon interval if you are doing auto-sampling. But only do so in a pre-production environment. And you still need to make sure that you're capturing all APs at each data point!<br /><br />It's very important to set the beacon data rate (lowest Basic / Mandatory rate) the same as will be used in production. This affects network discovery, association, and roaming for clients. You need to use the same data rate to ensure the association coverage area that clients will experience and be sure no coverage holes exist at that data rate. But be aware that co-channel interference is still caused further out because the Wi-Fi preamble is sent at 1, 2, or 6Mbps depending on the PHY. You still need to capture data out to the -85dBm range to properly account for CCI and minimize it. <br /><br />Cheers,<br />AndrewAndrew von Nagyhttps://www.blogger.com/profile/12658799453646609565noreply@blogger.comtag:blogger.com,1999:blog-1988432060681510848.post-9914659047406174772013-08-28T17:25:31.688-05:002013-08-28T17:25:31.688-05:00What are your thoughts on beacon-rate and beacon-i...What are your thoughts on beacon-rate and beacon-interval configuration on the survey-AP while doing passive surveys?<br /><br />Increasing beacon-interval might increase the accuracy (more datapoints) and making sure you are using 802.11g-rates (not 802.11b!) for beacons seems more sensible. I'm not really sure it would matter much though.Anonymoushttps://www.blogger.com/profile/15480335513034116536noreply@blogger.comtag:blogger.com,1999:blog-1988432060681510848.post-26756766168009281542013-08-23T16:34:01.331-05:002013-08-23T16:34:01.331-05:00Jon,
Great addition! I preach this too and somehow...Jon,<br />Great addition! I preach this too and somehow missed it in my best practices list. I'll add another best practice for "Survey Under Representative Conditions."<br /><br />Thanks!<br />AndrewAndrew von Nagyhttps://www.blogger.com/profile/12658799453646609565noreply@blogger.comtag:blogger.com,1999:blog-1988432060681510848.post-43987138782202397622013-08-21T09:53:08.973-05:002013-08-21T09:53:08.973-05:00Excellent post Andrew, this reminded me of doing m...Excellent post Andrew, this reminded me of doing more post-surveys instead of just moving to the next case :)Kristjanhttps://www.blogger.com/profile/07791117000552026755noreply@blogger.comtag:blogger.com,1999:blog-1988432060681510848.post-67106902621744808092013-08-21T03:59:03.804-05:002013-08-21T03:59:03.804-05:00Thanks for the great post Andrew.
I would suggest...Thanks for the great post Andrew. <br />I would suggest that when doing any type of active or post deployment survey it is sensible to do it only when the network is loaded with a typical number of clients. Even a terrible RF design can work when the network is quiet... CCI issues especially only rear their heads when things get busy!<br />Personally, I tend to do my post-install surveys whilst stood still at key locations and ensure that a good number of readings are acquired. I can then control exactly where all readings have been taken. Anonymoushttps://www.blogger.com/profile/09781002536512067265noreply@blogger.comtag:blogger.com,1999:blog-1988432060681510848.post-52012548299052356602013-08-19T17:46:58.347-05:002013-08-19T17:46:58.347-05:00Hello
Thanks for this article I find it veryy inf...Hello <br />Thanks for this article I find it veryy informative<br />What are some of the softwares\spectrum analyzers that you guys have used and prons an cons of each of them if that's possible <br /><br />Thanks<br />Regards<br />MehdiMehdihttps://www.blogger.com/profile/05772348952341209416noreply@blogger.com