My VAR recently assigned a project to perform active WLAN site surveys at several public libraries in my area. When they told me that meant I had to do twenty-six site surveys, I thought I had better get some tools setup to make this happen with some degree of efficiency! (and buy some new walking shoes, too….)
Caveat 1: I realize all WLAN professionals do not do active, on site surveys. (a.k.a. “AP-on-a-stick” surveys). I fully understand that. However, most of us will probably, sometime, have to perform this type of site survey. When you do, I am hoping that the following blogs will help.
Caveat 2: I know the solution below is not completely portable (well, it fits OK in the back of my Toyota 4Runner!). I am also looking for a fully mobile solution, that will fit in the trunk of a car and even capable of being transported as checked luggage on a plane. Please use the “Leave a Reply” section below for your own comments.
Caveat 3: (don’t you just love the word “caveat”?) I am using the title WLAN Planning for this series of blogs. This process is also called Wi-Fi site surveys, active site surveys and has a few other labels as well. But when all is said and done, what we are doing is WLAN planning — either planning to install a new WLAN or make changes to an existing one. So, WLAN Planning is what I am calling it!
Some brief project details: This chain of county libraries had existing Wi-Fi that was managed by an ISP. When Wi-Fi issues came up, the ISP would fix them by coming on site and usually just installing another AP, not digging deep into real Wi-Fi issues. Since Wi-Fi performance was lacking, the county IT department wanted to bring everything in house again, installing their own APs and managing with their own controllers. This meant site surveys needed to be done to properly locate APs for awesome Wi-Fi performance!
I had been toying around with some equipment I had in the garage for a few previous site surveys but since this project was the largest one I had done, I needed to fine tune my tools, equipment and procedures. So, I am planning on several blogs, covering 1) The WLAN Cart, 2) The WLAN Tool Kit (and misc. survey tools) and 3) The WLAN AP process.
Part 1: The WLAN Cart
Here’s a picture of my WLAN Cart.
I like this cart size as it rolls easily between cubicles and narrow spaces and fits on passenger elevators with ease. It also is steel and supports an amazing amount of weight and equipment. (You might want to try another vendor, like Rubbermaid carts.). It is also red in color, so it is easily seen and clients will not walk into it! (if only that was totally true…..)
I purchased the painter poles (to raise the AP to the proper survey height) at Home Depot (but you can look at Lowes or other big box stores in your area).
How I have my cart setup:
- PVC attached to cart to hold painter poles for the AP, sticker attachment
- Two additional PVC tubes to each side to hold additional poles, when needed.
- Caution tape and signage about what I am doing (if I had a nickel for every time I had to answer the question “What are you doing?”, I would be rich and retired right now….).
- Shelves to hold other equipment (laptop, distance measuring devices, cameras, AP power supply, notebook, etc)
- Terrawave/Ventev AP power supply
Additionally, if you are using the pole to mount the AP at heights of over 20′, I suggest two concrete blocks/cinder blocks or equivalent weight be placed on bottom shelf for stability (it would be a sad WLAN day to see a Cisco 3702i fall from twenty feet!).
How do you identify where the AP should be mounted? I do it the following ways (see photos below):
- I place a green sticker (marked “AP”) on the ceiling grid or wall surface. I developed a screw on painter handle and put a small piece of all-thread through the handle and double-sided tape on each end of the all-thread and use this to attach the sticker. Then, I use the other end to press the sticker into place. When the sticky part of the double sided tape is gone, refresh it with a dry glue stick.
- I then use my Bosch laser finder to measure the walls or an area landmark in two different directions (for example, AP will be mounted 20 from north wall and 15 feet from east exit doors)
- I then take a picture of the green sticker and indicate with graphics on the picture and include this information in my documentation that goes to the client with the site survey.
- Note: The above steps preclude any confusion for the cable pulling vendor, in case a sticker comes loose.
Part 2 of this blog series will cover the WLAN Tool Kit–what I take with me for onsite WLAN planning. Stay tuned!
By the way, an encouraging promise about plans from the Bible is below. I hope you enjoy it!
“For I know the plans I have for you,” declares the Lord, “plans to prosper you and not to harm you, plans to give you hope and a future”. Jeremiah 29:11