Hello. My name is Tyler McMinn with Aruba and you are watching the Aruba mobilities essentials series of videos. Our last video in the part 1 series, where we're talking about wireless technologies and we're going to end on some important planning concepts that you want to be aware of, you want to be thinking about when you're deploying wireless in your home, in a small business and an office. Let's get to it. My important planning concepts, let's take a peek. First and foremost, when you are designing or when you're about to deploy a wireless, you want to consider how can you minimize the number of devices, the number of laptops and mobile devices, and cameras and printers, and Roku boxes and PlayStation fives and whatever that are all competing for wireless access. In my own house, I've got the kids on PlayStation, there's an X box in another kid's room, we've got a Roku box over there. I know I'm bragging, but I pull those off of the wireless and I wired them up and you might think wire? what's the point here? You are a wireless engineer, why would you bother with this stuff? The reason is, the more of those devices that constantly stream a lot of data like Roku boxes, they'll go through gigs and gigs of video if you just use them like a television, which is what they're designed to do. Well, that would all impede your normal wireless that you're sending. If you're trying to do a Zoom call or Skype with somebody or whatever, you're going to be competing with a constant video stream of YouTube videos and PlayStation games and Roku videos and everything else. That's one option when you're just dealing with, say, a home environment is to try and wire up as many devices as you possibly can. Another option is by adding additional APs. Take the example of say 250 users on the floor of an office space. It's possible that I can put one AP at full power and maybe put a strong dipole antenna there to give me full coverage of that floor space. But then what would be the result? I'd have 250 users all contending for the same channel space. To reduce my co-channel interference, to reduce my number of users, to minimize the number of users on that competing space, one AP is not the solution, a better solution is to go with multiple APs spread out, giving you your coverage that you're looking for and maybe you need to put one over here, maybe this area you don't need coverage on, just depends. But to lay these out accordingly and let them figure out what power levels to negotiate, what channels to negotiate, so they have a good spread of channel space and the result is a reduction in co-channel interference, a reduction in the number of users that are sharing that channel space. By using more channels across more radios, you have less of a chance of that co-channel interference slowing you down. Increasing signal-to-noise is another good planning technique with smaller cells, that means your users are actually closer to the access points themselves, which means better amplitude, and therefore they can overcome absorption and some of the interference that they may have been receiving if they're trying to just get one signal off at one AP. Again, more AP tends to solve that and of course you want to figure out a way to free up the air time, limit the amount of co-channel interference and collisions and you've got more airtime for regular data, which means better amplitude, better signal to noise, better data modulation that gets negotiated and therefore higher data rates and quicker transmission data means you're on the network and off of it to allow it for somebody else to grab that channel space for the tens of microseconds that you're going to be using it. If you wanted to dive in a bit more and purchase a better access point, look at APs that are going to be adhering to the latest standards. There are a list of some of the latest 2020 standards that have been ratified. Some of these you might recognize that had been around for awhile, like the 802.11 a and b from 1999, the 802.11g from 2003, you got n over here, ratified in 2009 and where is ac? Ac in 2013. If you want a quick summarization of these standards as they came out over the years. This is chronologically listed for the first standard being 802.11, supporting 1-2 megabits per second with binary and quadratic phase shift keen. Then we went into quadratic amplitude modulation with a801.11 b and a ang g and then we've improved upon that over the years with our high throughput speeds of 802.11n and very high throughput standards, VHT standards of 802.11ac. It's a general recommendation. You always want to go with the highest standard that is supported by all needed devices in your environment. I have one of my access points in the 2.4 still broadcasting in g because I have an old, old wireless printer that I need to support. I was like all right, great and it comes in handy like Christmas lights and stuff. You might have like a wireless outlet that works on a radio or something. They often only support the 2.4 gigahertz, and they may not support some of the higher security standards. You may have to make a decision whether you want to allow that or not and if you do allow it and you're going to put on a timer or shut it down after midnight or what kind of security are you going to provide for that. But most of the time, if you can support ax, go with ax. If you have devices that have to run n, run n. But if you don't need to support this these older standards, It's recommended not to use them. Most modern commercial grade or enterprise grade devices like Aruba access points, have features to co-exist with these older standards and even some of the commercial off the shelf stuff does a pretty good job, but it generally will slow everybody else down to support older standard, especially the b standard. So a and g, if you can get rid of these, get rid of them. That's it for the mobility essentials part 1 series where we really took a focus on wireless technologies and compared wired vs wireless. We looked at the different wireless LAN organizations. We took a peek at RF communication components and what are the major planning considerations, as well as look at the 802.11 standards that govern the world when it comes to these wireless devices. Wireless truly is, it is truly the way of the world these days. There are far more people in the world that use mobile devices than use desktops or even laptops these days, and they're not plugged in it. The more comfortable you start to get with understanding how wireless works, this is really only going to help you, not only as a user of wireless in your day-to-day, but if you're interested in going into IT, you could do far worse than then pick it up some wireless under your belt. I hope this first part has been useful to you, we're going to stop this video here and come back with part 2, where we're going to be jumping in on the wireless architecture. What all the components of wireless there. Again, my name has been Tyler McMinn with Aruba. Thank you very much for your time.
