Cisco Cisco Aironet 350 Mini-PCI Wireless LAN Client Adapter Guia Do Desenho
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Enterprise Mobility 4.1 Design Guide
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Chapter 13 Cisco Unified Wireless Location-Based Services
Cisco Location-Based Services Architecture
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SOAP/XML Location Application Programming Interface (API)—The Location Appliance API
allows customers and partners to create customized location-based applications that interface with
the Cisco Wireless Location Appliance. For further details, see
allows customers and partners to create customized location-based applications that interface with
the Cisco Wireless Location Appliance. For further details, see
Accuracy and Precision
When discussing the performance of any positioning system, the metric that is usually the most familiar
to use is accuracy, which typically refers to the quality of the information being received. Location
accuracy refers specifically to the quantifiable error distance between the estimated location and the
actual location of the mobile device.
to use is accuracy, which typically refers to the quality of the information being received. Location
accuracy refers specifically to the quantifiable error distance between the estimated location and the
actual location of the mobile device.
However, in most real-world applications, any notion of location accuracy has little merit without the
ability of the solution to repeatedly and reliably perform at this level. Precision is a direct measure of
the reproducibility of the stated location accuracy. Any indication of location accuracy should therefore
include an indication of the repeatability or confidence level of successful location detection, otherwise
known as the location precision.
ability of the solution to repeatedly and reliably perform at this level. Precision is a direct measure of
the reproducibility of the stated location accuracy. Any indication of location accuracy should therefore
include an indication of the repeatability or confidence level of successful location detection, otherwise
known as the location precision.
When deployed in accordance with the best practices described in this chapter as well as those contained
within the documents referenced in
within the documents referenced in
, the location-aware Cisco UWN
is capable of excellent accuracy and precision. The Cisco Wireless Location Appliance allows the
system to deliver overall baseline performance of 10 meters accuracy with 90 percent precision. The
use of chokepoint location capabilities allow the level of accuracy to be even further refined, in some
cases to a resolution radius of a foot or less.
system to deliver overall baseline performance of 10 meters accuracy with 90 percent precision. The
use of chokepoint location capabilities allow the level of accuracy to be even further refined, in some
cases to a resolution radius of a foot or less.
These baseline performance levels can be reached using the design, calibration, and deployment tools
included with the system. Included are predictive pre-deployment tools such as the Location Planning
and Location Readiness tools, as well as post-deployment verification tools such as the Location
Inspector.
included with the system. Included are predictive pre-deployment tools such as the Location Planning
and Location Readiness tools, as well as post-deployment verification tools such as the Location
Inspector.
The Location Planning tool provides recommendations for access point placement and density to create
a WLAN deployment that supports location accuracy within the specifications of the location appliance.
In software Release 4.1, support for irregularly-shaped polygonal buildings has been added to help
organizations address the requirements of such structures. The Location Readiness tool allows network
engineers to identify beforehand whether their currently planned access point deployment will support
location accuracy within the specifications of the location appliance.
a WLAN deployment that supports location accuracy within the specifications of the location appliance.
In software Release 4.1, support for irregularly-shaped polygonal buildings has been added to help
organizations address the requirements of such structures. The Location Readiness tool allows network
engineers to identify beforehand whether their currently planned access point deployment will support
location accuracy within the specifications of the location appliance.
By using the Location Inspection tool shown in
, the system designer can evaluate
post-calibration baseline accuracy and precision levels in their actual environment. After an accuracy
level is selected, the Location Inspection tool displays, in color-coded format, the level of precision at
any point from 0–5 percent all the way to a maximum of 95–100 percent. After viewing the output, the
system architect can then work with the installation team to take the necessary steps to ensure that the
system's performance is sufficient.
level is selected, the Location Inspection tool displays, in color-coded format, the level of precision at
any point from 0–5 percent all the way to a maximum of 95–100 percent. After viewing the output, the
system architect can then work with the installation team to take the necessary steps to ensure that the
system's performance is sufficient.