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BlueIOT Technology Co., Ltd.

Bluetooth AoA Technology

Centimeter-Level Accuracy for Indoor Positioning

System Architecture

From tags and anchors to the processing engine and application software, every layer is built to deliver real-time location data through an open API.

  • Bluetooth Tags & Anchor
  • High Precision T-Engine
  • Location Application Platform
System Architecture

Bluetooth AoA vs. RSSI Beacon Technology

Three Main Indoor Positioning Technologies: Bluetooth AoA, RSSI Beacon, and UWB.

Bluetooth AoA provides sub-meter accuracy through angle detection, ideal for cost-sensitive precision tracking.

RSSI Beacons rely on signal strength estimation, offering simpler deployment for basic proximity tracking (5m accuracy) in retail and hospitality, though susceptible to environmental interference.

UWB provides the highest accuracy (<10cm) via GHz-level pulse transmission, but requires dedicated infrastructure at higher cost, typically deployed in industrial settings like factories and power plants.

AoA balances accuracy and affordability, Beacons serve low-cost proximity-based use cases, and UWB excels in mission-critical applications. Both Bluetooth solutions (AoA and Beacons) offer better battery life and lower deployment complexity than UWB, which needs its own dedicated infrastructure.

Technology Bluetooth AoA Bluetooth RSSI UWB
Protocol Anchor: BT5.1
Tag: BT4.0+
Anchor: BT4.0+
Tag: BT4.0+
Anchor: UWB
Tag: UWB
Typical Accuracy 0.3–0.5m 5–10m 0.1–0.3 m
Refresh Rate High Low Medium
Compatibility Various BLE AoA tags such as mobile phones, bracelets, watches, beacon, etc. Additional special tags for return channels such as LoRa are required UWB Tag
Tag Power Consumption Low High High
Anchor Cost General Low High
Tag Cost Low High High
IoT Anchor Capability Yes No No
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