In the Bluetooth positioning method, the UE position is estimated with the knowledge of geographical coordinate of reference Bluetooth beacons. This is accomplished by collecting a certain amount of measurements from UE's Bluetooth receiver, and applying a location determination algorithm using databases of the estimated position's references points.
The UE Bluetooth measurements may include:
Bluetooth beacon's Received Signal Strength (RSSI).
Two positioning modes are supported:
Standalone: The UE performs Bluetooth position measurements and location computation.
UE-assisted: The UE provides Bluetooth position measurements without assistance from the network to the LMF for computation of a location estimate by the network.
This clause defines the information that may be transferred between LMF and UE.
The Capability Transfer procedure for Bluetooth positioning is described in clause 126.96.36.199
Assistance data transfer is not required for Bluetooth positioning.
The purpose of this procedure is to enable the LMF to request position measurements or location estimate from the UE, or to enable the UE to provide location measurements to the LMF for position calculation.
shows the Location Information Transfer operations for the Bluetooth method when the procedure is initiated by the LMF.
The LMF sends a LPP Request Location Information message to the UE for invocation of Bluetooth positioning. This request includes positioning instructions such as the positioning mode (UE-assisted, Standalone), specific requested UE measurements if any, and quality of service parameters (accuracy, response time).
The UE performs the requested measurements and possibly calculates its own location. The UE sends an LPP Provide Location Information message to the LMF before the Response Time provided in step (1) elapsed. If the UE is unable to perform the requested measurements, or if the Response Time provided in step 1 elapsed before any of the requested measurements have been obtained, the UE returns any information that can be provided in an LPP message of type Provide Location Information which includes a cause indication for the not provided location information.
shows the Location Information delivery operations for the Bluetooth method when the procedure is initiated by the UE.
The UE sends an LPP Provide Location Information message to the LMF. The Provide Location Information message may include UE Bluetooth information or location estimate already available at the UE.