Cisco Wlan Design Guide

Topics: Wi-Fi, Wireless access point, Wireless LAN Pages: 43 (13630 words) Published: June 22, 2013
Wireless LAN Design Guide for High Density Client Environments in Higher Education

Design Point #1: Establish and Validate a Per-Connection Bandwidth Requirement Design Point #2: Calculate the Aggregate Throughput Required for the Coverage Area

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Design Point #3: Choose a High Minimum Data Rate to Support Increased E ciency,

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Design point #4: 5 GHz Support will be Critical for High Density, so Determine the Channel Plan that you will Support and How it will be Administered

Design Point #5: Account for and Manage all Energy within the Operating Spectrum to Ensure all of it is Available for Use

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© 2011 Cisco and/or its affiliates. All rights reserved.

Wireless LAN Design Guide for High Density Client Environments in Higher Education

Conclusion

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© 2011 Cisco and/or its affiliates. All rights reserved.

Wireless LAN Design Guide for High Density Client Environments in Higher Education

About the Guide

Related Documentation
Cisco Mobility 4.1 Design Guide Cisco Campus Wireless LAN Controller Configuration Design Guide Optimize the Cisco Unified Wireless Network to Support Wi-Fi Enabled Phones and Tablets 802.11n: Mission-Critical Wireless

Executive Summary

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© 2011 Cisco and/or its affiliates. All rights reserved.

Wireless LAN Design Guide for High Density Client Environments in Higher Education

Introduction

Cisco’s Uni ed Wireless Network • Plan: Determine application and device requirements such as bandwidth, protocols, frequencies, service level agreement (SLA), etc. • Design: Determine density, cell sizing, antennas, coverage, site survey, etc. • Implement: Install, test, tune, establish baseline, etc. • Optimize: Monitor, report, adjust, review baseline for SLA • Operate: Cisco Wireless Control System (WCS) monitoring, troubleshooting tools, capacity monitoring and reporting tools, etc. The general concepts underlying high density Wi-Fi design remain true for many environments. But it is important to note that the content and solutions presented here will not fit every WLAN design scenario. Rather, the intent of the guide is to explain the challenges in WLAN design for high density client environments and to offer successful strategies so that engineers and administrators understand them and are able to articulate the impact design decisions will have.

Target Environmental Characteristics for WLANs in Higher Education Environments High-density WLAN design refers to any environment where client devices will be positioned in densities greater than coverage expectations of a normal enterprise deployment, in this case a traditional, carpeted office. For reference, a typical office environment has indoor propagation characteristics for signal attenuation. User density is the critical factor in the design. Aggregate available bandwidth is delivered per radio cell, and the number of users and their connection characteristics (such as speed, duty cycle, radio type, band, signal, and SNR) occupying that cell determines the overall bandwidth available per user. A typical office environment, Figure 1, may have APs deployed for 2500 to 5000 square feet with a signal of -67 decibels in millowatts (dBm) coverage and a maximum of 20 to 30 users per cell. That is a density of one user every 120 square foot (sq. ft.) and yields a minimum signal of -67 dBm.

In planning and deploying such a WLAN, an AP is typically placed in an area expected to have a higher user density, such as in a conference room, while common areas are left with less coverage. In this way, pre-planning for high density areas is anticipated. Conference rooms are often placed in clusters, so it is best to design for the maximum capacity of the area. For example, maximum occupancy for the three rooms is 32, so user density would be one user per 28 square feet, Figure 2. 4 © 2011 Cisco and/or its affiliates. All rights reserved.

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