Technology Blog

Designing HD WLANs


Hi Community Member!


Designing HD WLANs was a presentation I gave at Airheads Conference Las Vegas 2012 in March.   I would like to share this now with the larger Airheads Social Community since there has been so much interest.


This session will explain how to implement an Aruba 802.11n wireless network that must provide high-speed access to an auditorium-style room with 500 or more seats. Aruba Networks refers to such networks as high-density wireless LANs (HD WLANs). Such coverage areas have many special technical design challenges. We will cover the design principles, capacity planning methods, and physical installation knowledge needed to successfully deploy HD WLANs.



Video 1 of 3
Setting the stage

Defining what we mean by “High Density Area,” Technical aspects

00:00 – 04:12


Introducing the HD WLAN Capacity Planning Methodology



Step 1: Determine Device Count



Step 2: Determine Channel Count

08:53-12:29  Overlapping vs. Stacking

12:30-13:45  Channels Allowed by National Regulatory Agency

13:46-15:42  20 MHz vs. 40 MHz Channels

15:43-18:50  To DFS or Not to DFS? Dynamic Frequency Selection (DFS)



Video 2 of 3
Step 3: Choose Concurrent User Target

00:00-01:05  Aruba High Density Testbed- Determining how many users to put on an AP?

01:06-06:28   Measured 20 MHz Channel Capacity

06:29-10:52  Tradeoffs Between Bandwidth and User Count *Most important slide in the deck*


Step 4: Determine Total Capacity



Tradeoffs With Attempting Channel Reuse



Step 5: Validate Capacity Goal




Video 3 of 3
RF Design for High-Density WLANs

Coverage Strategies for Auditoriums



AP Coverage Strategies- Pros and Cons



Adjacent HD WLANs

03:16- 04:44


Essential Aruba Features for HD WLANs

04:45- 06:12


Case Study:  Marina Bay Sands Singapore & Young Presidents Asia Conference

Technical Requirements, RF Plan, RF Design, AirWave stats and reporting

06:13- 14:09 (end)

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