Introduction toBluetooth Positioning.

In a gateway-based deployment, Bluetooth tags travel with people or assets while receiving stations stay at surveyed locations. A tag broadcasts its identifier and supported telemetry; gateways forward observations such as received signal strength (RSSI) to a server. The software can associate a tag with a room or zone, or estimate position using a calibrated model.

“Bluetooth base station” does not identify a single positioning algorithm. A basic receiver may support RSSI collection, while an AoA locator needs different radio and antenna capabilities. Putting several ordinary gateways in a room does not automatically create an AoA system.

For personnel badges, start by defining whether the application needs presence in a zone or a continuous coordinate track. Test gateways near doors, shelving and occupied work areas. Set broadcast and reporting intervals together so that battery life, network traffic and location freshness match the task.

In a fixed-beacon layout, transmitters are attached to known places. A phone or scanning terminal detects their identifiers and signal levels, then a device application or server estimates the receiver location. This reverses the common asset-tracking layout: the reference transmitter stays still and the receiver moves.

Beacon formats such as iBeacon identify a broadcast; they do not independently calculate coordinates. Proximity thresholds, zone rules or a site fingerprint can turn observations into location estimates. RSSI is affected by body absorption, walls, antenna orientation and reflections, so signal strength is not an exact distance ruler.

For a visitor-navigation or mobile-terminal project, validate scanning support and application behavior on the actual devices. For asset inventory, it may be simpler to attach broadcasting tags to assets and let fixed gateways listen. Both use BLE broadcasts, but the receiver, power and software responsibilities differ.

Angle of arrival (AoA) estimates the direction from which a radio signal reaches a receiver. A compatible transmitting tag and a receiving antenna array provide the measurements used by the direction-finding algorithm. Phase observations across array elements, combined with array geometry, allow the receiver to estimate an arrival angle.

An angle is not yet a complete position. A positioning engine must combine observations with known locator coordinates, orientation and suitable geometric constraints. Depending on the design, this can involve multiple locators or a known target plane. Mounting height and target height matter when translating an angle into a floor position.

For tool and medical-equipment tracking, check tag compatibility, calibration and coverage with people and metal objects present. The JJ-IS40BXPA specification lists less than 0.5 m in unobstructed conditions; this is a model-specific nominal figure, not a guarantee for all Bluetooth AoA installations.

Time of flight (ToF) relates signal travel time to distance. For Bluetooth product selection, the standardized feature to examine is Channel Sounding, introduced in Bluetooth Core 6.0. It includes phase-based ranging (PBR) and round-trip timing (RTT). Calling the whole feature “Bluetooth ToF” leaves out the phase-based measurement path.

RTT measures a two-way exchange; the responder turnaround and implementation timing must be accounted for before interpreting propagation time. PBR uses phase observations at multiple frequencies to estimate distance. The available measurements, algorithms and calibration determine the result. Ordinary beacon packet timestamps or RSSI readings are not substitutes for Channel Sounding radio support.

A distance between two devices is not a 2D or 3D coordinate. Positioning needs known references and enough independent geometric constraints. Pairwise ranging may suit a defined proximity task, while a multi-device tracking design must also evaluate measurement scheduling, battery use and system capacity.

The Jinju specifications currently supplied on this site do not confirm Channel Sounding support. Treat this section as a technology guide and verify radio, firmware and host software support on both devices before selecting hardware.