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Motorola Public Document Classification, October 2011

MODULE 18

WLAN VALIDATION

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Motorola Public Document Classification, October 2011

At the end of this module, you will be able to:

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Objectives

– Identify the four phases of WLAN validation– Distinguish between an active site survey and a passive site

survey– Describe site walkabout guidelines– Identify the prerequisites for a performance test– Identify the questions answered during a performance test

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Motorola Public Document Classification, October 2011

Phases of Validation

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Motorola Public Document Classification, October 2011

Phases of Validation - Overview

Site survey validation Performance testing Spectrum analysis (*) Security testing (*)

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Motorola Public Document Classification, October 2011

Site Survey Validation

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Motorola Public Document Classification, October 2011

Summary

Purpose Verify RF Characteristics meet QoS requirements of network design

Prerequisites AP’s are installed and operating

Validation site survey phases Passive LANPlanner / Site Scanner site survey (RF Monitoring)Active LANPlanner / Site Scanner site survey (AP performance)

Considerations A precise validation survey must combine active and passive site surveys

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Motorola Public Document Classification, October 2011

Passive Site Survey Basics

• Survey instrument is a laptop or tablet– with LANPlanner/Site Scanner or an equivalent

survey tool• Survey instrument measures RF energy• Survey instrument generates no WLAN traffic

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Motorola Public Document Classification, October 2011

Passive Site Survey Basics

1. Load site floor plans

2. Mark your starting point

3. Enable RF sensor

4. Walk and mark . . .

5. . . . walk halls, rooms, and open spaces

6. Insert reference points

7. Save survey data

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Motorola Public Document Classification, October 2011

Walkabout Guidelines (1 of 3)

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Motorola Public Document Classification, October 2011

Walkabout Guidelines (2 of 3)

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Motorola Public Document Classification, October 2011

Walkabout Guidelines (3 of 3)

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Motorola Public Document Classification, October 2011

Active Site Survey

• Measures both RF energy . . .• and a continuous data stream . . .• between an AP and the survey instrument

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Motorola Public Document Classification, October 2011

Interpret Survey Results

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Motorola Public Document Classification, October 2011

KEY GUIDELINE

Ensure that the survey tool sampling interval is greater than the AP beacon interval

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Motorola Public Document Classification, October 2011

Performance Testing

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Motorola Public Document Classification, October 2011

Summary

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Motorola Public Document Classification, October 2011

Basics

• Requires both the wired and wired segments of the WLAN

• Requires connectivity to application servers and network resources

• Requires an instance of each client device type and model supported by the network

• Requires an instance of each end-user application supported by the network

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Motorola Public Document Classification, October 2011

Initial Checklist

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Motorola Public Document Classification, October 2011

Application Performance Test Checklist

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Motorola Public Document Classification, October 2011

Roaming Performance Test Guidelines

• During a roaming test, duplicate the maximum roaming speeds users are likely to attain

• Use a packet trace tool during roaming tests, particularly for latency-sensitivereal-time applications

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Motorola Public Document Classification, October 2011

Load Performance Testing

• Determine: Do applications meet QoS requirements when the WLAN is under a typical expected load?

• Recruit end users or an extended test team to simulate site usage scenarios

• Employ a centralized management system to monitor network and application performance

• Interview users to discover the perceived performance of individual applications

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Motorola Public Document Classification, October 2011

WLAN Validation – Review

• Use appropriate tools (LANPlanner , SiteScanner, etc.) to validate RF performance

• Be sure to use “Walkabout Guidelines” to validate quality of RF performance

• Ensure site survey tool sampling interval is greater than the AP beaconing interval

• During roaming test, be sure to duplicate the maximum roaming speeds users are likely to use.

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Motorola Public Document Classification, October 2011MOTOROLA, MOTO, MOTOROLA SOLUTIONS and the Stylized M Logo are trademarks or registered trademarks of Motorola Trademark Holdings, LLC and are used under license. All other trademarks are the property of their respective owners. © 2011 Motorola Solutions, Inc. All rights reserved.

You should now be able to:

– Identify the four phases of WLAN validation– Distinguish between an active site survey and a passive site

survey– Describe site walkabout guidelines– Identify the prerequisites for a performance test– Identify the questions answered during a performance test

MODULE SUMMARY