Information About Bluetooth Low Energy
Bluetooth low energy (BLE) is a wireless personal area network technology aimed at enhancing location services for mobile devices. The small bluetooth tag devices placed at strategic locations transmit universally unique identifiers (UUIDs) and, Major and Minor fields as their identity. These details are picked up by bluetooth-enabled smartphones and devices. The location information of these devices are sent to the corresponding back-end server. Relevant advertisements and other important information are then pushed to the devices using this location-specific information.
The BLE feature also provides BLE beacon management support and specifies its behavior when used within the Cisco WLAN system. Using the Cisco CleanAir, an access point can identify an iBeacon signal and decode the payload content. The extracted tag device details are used for better management of the device.
By treating a tag device as an interferer and using the existing system capabilities, such as interference location, the tag device can be located on a map display in a wireless LAN deployment and its movement monitored. Besides this, information on missing tags can also be obtained. This feature can determine rogue and malicious tags using the unique identifier associated with each tag (or family of tags) against a predetermined whitelist from a customer. Using the management function, alerts can be displayed or emailed based on rogue tags, missing tags, or moved tags.
Limitations of BLE Feature
The wireless infrastructure must support Cisco CleanAir.
Supports a maximum of only 250 unique BLE beacons (cluster entries) and 1000 device entries.
The BLE feature on the Cisco Aironet 3700 Series Access Points with Halo module gets deactivated when NTP is configured (This behavior is also observed when Cisco CMX is not present.) So, the legacy BLE does not work when Cisco CMX is present or not configured for Hyperlocation.
Areas of Use
Since the BLE feature provides granular location details of devices (smart phones or bluetooth-enabled devices) that helps push context-sensitive advertising and other information to users. Possible areas of application include retail stores, museums, zoo, healthcare, fitness, security, advertising, and so on.