10-29
Cisco Wireless LAN Controller Configuration Guide
OL-1926-06OL-9141-03
Chapter 10 Configuring Radio Resource ManagementWireless Device Access
Configuring CCX Radio Management Features
Configuring CCX Radio Management Features
In controller software release 4.0, you can configure two parameters that affect client location
calculations:
• Broadcast location measurement requests
• Location calibration
These parameters are supported in Cisco Client Extensions (CCX) v2 and higher and are designed to
enhance location accuracy and timeliness for participating CCX clients. See the “Configuring Quality
of Service Profiles” section on page 6-19 for more information on CCX.
For the location features to operate properly, the access points must be configured for normal, monitor,
or hybrid-REAP mode. However, for hybrid-REAP mode, the access point must be connected to the
controller.
Note CCX is not supported on the AP1030.
Broadcast Location Measurement Requests
When this feature is enabled, lightweight access points issue broadcast radio measurement request
messages to clients running CCXv2 or higher. The access points transmit these messages for every SSID
over each enabled radio interface at a configured interval. In the process of performing 802.11 location
measurements, CCX clients send 802.11 broadcast probe requests on all the channels specified in the
measurement request. The Cisco Location Appliance uses the uplink measurements based on these
requests received at the access points to quickly and accurately calculate the client location.
You do not need to specify on which channels the clients are to measure. The controller, access point,
and client automatically determine which channels to use.
Note Non-CCX and CCXv1 clients simply ignore the CCX measurement requests and therefore do not
participate in this location measurement activity.
Location Calibration
For CCX clients that need to be tracked more closely (for example, when a client calibration is
performed), the controller can be configured to command the access point to send unicast measurement
requests to these clients at a configured interval and whenever a CCX client roams to a new access point.
These unicast requests can be sent out more often to these specific CCX clients than the broadcast
measurement requests, which are sent to all clients.
When location calibration is configured for non-CCX and CCXv1 clients, the clients are forced to
disassociate at a specified interval to generate location measurements.
To Next Page
Loading...
Need help?
General
