Cisco Cisco Aironet 3500p Access Point Libro blanco

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A second advantage of CleanAir technology is that it can be operated remotely. For many Wi-Fi deployments, the

IT staff at one location manages equipment at multiple buildings in a campus or multiple geographical locations,

and it can be difficult to physically take a tool to these remotely managed sites. This is particularly true for

deployments with many branch offices, or when the interference is transient in nature. By having spectrum

management integrated into the infrastructure, IT is able to remotely view interference conditions anywhere on the

network.

Cisco CleanAir technology can also physically locate interfering devices (Figure 3). In most cases, multiple access

points will observe the same device causing interference. Cisco has developed sophisticated technology to

compare the devices reported from multiple access points, and to determine which reports are actually caused by

the same device. Once the devices have been correlated, CleanAir technology makes it possible to pinpoint the

exact location of the device using triangulation, similar to the way that infrastructure systems are currently able to

locate Wi-Fi clients and tags.

Figure 3. Locating Interference Devices and Their Zone of Impact

Perhaps the biggest advantage of the CleanAir technology integration into the WLAN is that SI data becomes

available to the access point RRM system, where it can be used to implement 24/7 automated mitigation of

interference. This is truly the next generation of RRM, allowing for much greater reliability than previous versions,
which were simplistically identified interference as noise. With CleanAir technology, it’s possible to tune the

network to automatically work around many types of interference. Once known interference is identified then

appropriate mitigation can be applied with intelligence and therefore with confidence.