H3C Technologies H3C WX6000 Series Access Controllers - Manual (Page 582)

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AP version settings: A fit AP is a zero-configuration device. It can automatically discover an AC
after power-on. To ensure that a fit AP can associate with an AC, their software versions must be
consistent by default, which complicates maintenance. This task allows you designate the software
version of an AP on the AC, so that they can associate with each other even if their software
versions are inconsistent.
AP working mode switching: Switches the working mode of an AP between the fit mode and the fat
mode.
Wireless Location
Support for the wireless location feature depends on your device model.
Wireless location is a technology to locate, track and monitor specified devices by using WiFi-based
Radio Frequency Identification (RFID) and sensors. With this function enabled, APs send Tag or MU
messages to an AeroScout Engine (referred to as AE hereinafter), which performs location calculation
and then sends the data to the graphics software. You can get the location information of the assets by
maps, forms, or reports. Meanwhile, the graphics software provides the search, alert and query
functions to facilitate your operations.
Wireless location can be applied to medical monitoring, asset management, and logistics, helping users
effectively manage and monitor assets.
Architecture of the wireless location system
A wireless location system is composed of three parts: devices or sources to be located, location
information receivers and location systems.
Devices or sources to be located, which can be Tags (small, portable RFIDs, which are usually
placed or glued to the assets to be located) of Aero Scout or Mobile Units (MU), that is, wireless
terminals or devices running 802.11. These devices can send wireless messages periodically.
Location information receivers, for example, 802.11 APs, and AeroScout Exciters that are standard
compliant Tags to send wireless messages but do not collect location information.
Location systems, including location server, AE calculation software, and different types of
graphics software.
Wireless locating process
A wireless location system can locate wireless clients, APs, rogue APs, rogue clients, Tags and other
devices supporting WLAN protocols. Except Tags, all wireless devices will be identified as MUs by the
wireless location system.
1) Send Tag and MU messages
A Tag message is a message sent by an RFID. A Tag message contains the channel number so that an
AP can filter Tag messages whose channel numbers are not consistent with the AP’s operating channel.
To ensure that more Tags can be detected by the AP, a Tag sends messages on different channels.
Generally, a Tag periodically sends messages on one or multiple pre-configured channels, and then
sends location messages on channels 1, 6, and 11 in turn periodically.