Vehicle Positioning

Vehicle positioning refers to the use of technology to determine the exact location of a vehicle within a specific coordinate system, such as latitude and longitude. Acting as a vehicle's "digital footprint", it serves as the foundational technology for key functions like navigation, fleet dispatching, anti-theft tracking, and autonomous driving.

Core Technology: Satellite Positioning as the Backbone

At present, the primary core technology is the Global Navigation Satellite System (GNSS), which includes the US-developed GPS and China's BeiDou. By receiving signals from at least four satellites, the system computes the vehicle's precise location via trilateration.

• Mainstream Trend: Multi-Constellation Fusion and High Precision. Relying solely on GPS is fast becoming a thing of the past. Modern in-car telematics units widely adopt BeiDou + GPS dual-mode positioning, or even multi-system compatibility, to significantly improve signal availability and accuracy. For instance, services from Qianxun Spatial Intelligence offer real-time kinematic (RTK) positioning with accuracy down to 2 centimetres. By late 2025, the world's first mass-produced passenger car equipped with a standalone BeiDou positioning system rolled off the assembly line in China, representing a major milestone in technological self-reliance and security.

System Architecture and Integration

A complete vehicle tracking and positioning ecosystem typically comprises three components: on-board hardware, telecommunication networks, and backend platforms. The in-vehicle unit captures satellite signals to determine location data, which is then transmitted alongside parameters like vehicle speed to the management server or the owner's mobile app via 4G/5G networks. This facilitates critical operations such as fleet management, logistics coordination, and vehicle recovery.

Complementary Technologies: Sensor-Assisted Positioning

Satellite positioning is not foolproof, as signals degrade or drop out completely inside tunnels and basement car parks. To counter this, modern systems integrate several complementary positioning technologies:

• Dead Reckoning (DR): Utilizing gyroscopes and accelerometers, the system computes changes in speed and heading once satellite reception is lost, ensuring seamless positioning continuity across temporary blind spots.

• Vision and Map Matching: In-car cameras detect road features such as lane markings and match them against high-definition map data to correct satellite positioning drift.

• V2X and Roadside Units (RSU): In designated smart zones, vehicles communicate with roadside infrastructure, leveraging time-of-flight signal measurements to assist with localisation.

• Car Finder Feature: Designed to solve the hassle of locating parked cars in massive multi-storey or underground car parks, this system utilizes indoor positioning technologies like Bluetooth AoA to deliver walking navigation with up to 0.3-metre accuracy directly on the driver's smartphone.