In all enterprise wireless deployments, AP location is manually entered. In many cases, the AP location is not entered because
it is a tedious process to identify the location manually and enter it in the system, or, the AP location is entered only
to provide a reference for client location. A Global Positioning System (GPS) or a Global Navigation Satellite System (GNSS)
solution is not feasible because of the indoor nature of the deployments.
From Cisco IOS XE Dublin 17.12.1 onwards, a solution to effectively self-locate the APs in a global coordinate by combining
various ranging technologies and algorithms, is introduced through the AP Location feature.
Location of an object, by definition, is dependent on a reference point. Here, reference points are based as a few subsets
of sparse nodes from a group of nodes serving a continuous RF domain. These are the ones that have visibility to the open
sky, namely, the ones located near the windows, or the ones at the periphery of the building or floor.
The AP Auto Location solution delivers accurate, automated, up-to-date AP location leveraging Fine Timing Measurement (FTM)
and GNSS when available. If GNSS is not accessible, a few manual anchors need to be provided per floor. This feature requires
an AP density such that neighboring APs can hear each other at maximum power. The accuracy of the feature depends on the building
type and the distances between APs.
The process includes:
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Segmentation of a large number of APs into smaller segments with floor-level labels and the calculation of the geolocations
of all the APs at the end of the process.
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Geolocation of an AP is determined at the controller, Cisco Spaces, or both the controller and Cisco Spaces.
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Highly accurate GNSS positioning of the APs that have good GNSS signal reception and, geolocating the APs with no GNSS reception
by running the locationing algorithm to determine the geolocation based on inter-APs ranging data (FTM) to GNSS-enabled APs.
From Cisco IOS XE 17.13.1 onwards, the AP Auto Location Support feature has been improvized to help wireless clients to leverage
FTM and AP GNSS for indoor navigation.
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Client FTM: You can enable the FTM responder in the designated WLANs for indoor navigation. The APs support ranging from unassociated
clients through the FTM responders in the 5-GHz and 6-GHz bands.
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Air Pressure Reporting Updates: APs send air pressure report to the controller. As an enhancement to this feature, in Cisco
IOS XE 17.13.1, remote procedure calls (RPC) and the Privileged EXEC mode commands enable the collection of air pressure details
for a specific duration. For example, if you set the duration as 10 minutes, then the AP will send samples every 30 seconds,
for 10 minutes.
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AP Band Filters: In Cisco IOS XE Dublin 17.12.1, the area optimization for AP-to-AP ranging was triggered on a per site-tag
basis. From Cisco IOS XE Dublin 17.13.1 onwards, band filters such as 5 GHz or 6 GHz are enhanced for effective ranging.
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AP Ranging Completion Notification: The controller monitors all APs in a given site for ranging completion. Ranging is considered
as complete only after the AP sends the ranging report back to the controller, in response to the ranging requests made by
the controller.
The controller notifies the APs and Cisco Spaces when ranging is complete for a given site.
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AP Movement Alarm: When an AP gets disconnected and later reconnects in a different location, the AP sends an alarm to the
controller. The controller prints a syslog and sends an event to Cisco Spaces, to notify the user about the AP movement.
Use Case
A typical use case of the solution in the controller is either self-locating APs in one building or APs in one floor of a
building.
Supported Access Points
This feature is supported in the following APs:
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Cisco Catalyst 9130 Series Access Points
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Cisco Catalyst 9136 Series Access Points
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Cisco Catalyst 9164 Series Access Points
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Cisco Catalyst 9166 Series Access Points