Enterprise IT continues to play a critical role in the Internet of Things (IoT). A large part of IT’s role is understanding and anticipating what new device types will hit the network, when and how to optimally connect them. Beyond the obvious applications and services, an often-overlooked factor is the actual design of the thing. What spectrum does it use? And how will it impact your network?
Today Wi-Fi devices, including things such as sensors, connect using one of two spectrum bands – 2.4GHz or 5GHz. Conventional wisdom has been to advertise a common SSID for both 2.4GHz and 5GHz connectivity. But, with the rapid rise of more connected things, this has likely outlived its usefulness. Let me explain why this is my point of view. Read More »
Tags: 2.4GHz, 5Ghz, 802.11n, Cisco Mobility, internet of things, IoT, SSIDs, wi-fi, Wi-Fi Devices
Editor’s Note: This is a guest post by Joe Rogers, Associate Director of Network Engineering for the University of South Florida (USF). Hear Joe speak about his experiences with next-generation wireless in high density environments on next Tuesday’s webinar: “Migrating Enterprise Networks to 802.11ac” at 10am PST (Dec 17) (Register here)
Joe Rogers is the Associate Director of Network Engineering for the University of South Florida. He is a graduate of USF’s Computer Science and Engineering program and has worked as a network engineer at USF for the past 20 years. He is currently responsible for all aspects of USF’s network which provides connectivity to over 100k devices across three campuses. He’s held a CCIE routing and switching certification since 1999. When not working, he’s an avid mountain biker (if you can call it “mountain” biking when you live in Florida).
Universities face some of the most complex design challenges in wireless networking. Our user population is highly mobile, bandwidth-hungry, and often simultaneously using at least two wireless devices in rooms with hundreds of their classmates. The wireless network isn’t simply a convenience to them. It’s critical to their educational success as many of the students are taking tests or working on assignments across the network.
At the University of South Florida, we support over 20,000 concurrent wireless users on our network of over 4,000 access points. We have more than 90,000 unique devices registered this semester. Our biggest challenge is designing the wireless network for the device densities in our large classrooms and popular study areas. In these locations, we often have a thousand devices in a few hundred square feet of space.
We heavily rely on band select to place as many devices as possible on 5Ghz where more channels are available. Unfortunately many devices such as older tablets and smart phones simply don’t have an 802.11a/n radio. So we must carefully RF engineer the environment with smaller cells to provide the necessary coverage density. Read More »
Tags: 5Ghz, 802.11, 802.11ac, band select, bandwidth, Cisco, college, guest blog, high density, higher education, migrating, network, network engineer, next-generation wireless, rf, Smart phone, student, tablet, university, user population, webinar, wireless