In-Vehicle Wireless Experience Validation

The in-vehicle infotainment system provides a great driving experience by integrating communication, navigation, multimedia entertainment, and automotive safety systems. Although head units boast strong connectivity performance and cross-device capabilities, potential compatibility issues and connection failures still have a fatal impact on user experience and safety.


Have You Ever Encountered These Annoying In-Vehicle Scenarios?

  1. You try to connect your smartphone to the head unit, but the wireless connection drops again and again.
  2. You try to charge your phone with a USB port, but for unknown reasons, it fails.
  3. You want to make a hands-free call through the head unit, but you can’t hear anyone talking for no apparent reason.

If the abovementioned scenarios distract drivers, it will cause property damage and even put people in danger.

Products that hit the road before being thoroughly inspected run a multitude of risks.

Don’t let connectivity or compatibility errors become real-life nightmares to users and to your brand reputation.

Why Choose Allion?

Allion has developed the most comprehensive interoperability test matrices to verify whether head unit products can interoperate with software and hardware devices manufactured by different vendors. In the development of the head unit, a wide range of technologies and standard certifications are involved. Allion horizontally integrates various certification programs and creates the greatest service value for customers.

Standard Certifications Are the Gatekeepers for Product Quality

  • Wireless technologies: short-range Bluetooth, long-range mobile communication technology, 3G/4G/5G, LTE-U, and more.
  • USB Type-C® and HDMI ports are getting increasingly popular in automotive systems because high-speed connectors and cables are massively used in mobile and storage devices.

Allion is an authorized test lab accredited by more than 30 global standard associations. We provide one-stop services to help vendors go through qualifications and get certified in a short time.

10+ Years of Accumulated Head Unit Test Experience

  • Tested over 150 head units
  • Tested over 3000 smartphones
  • Test time of over 80,000 hours
  • Discovered more than 25,000 issues

Common Connectivity Issues and Risks in Head Units

Based on our testing experience accumulated over the past decades, we classify different problems and make a chart of common connectivity issues (Figure. 1). The top three most annoying issues are—malfunctions (69%), pairing problems (32%), and single- or multi-device connection failures (28%).

Allion Test Planning for Head Unit Connectivity Performance

To tackle the common issues and potential risks related to head unit connectivity performance, we develop a structure for test planning with 7 test highlights:

  1. Cross-device connectivity test: A smartphone connects to the head unit for the first time
  2. Bluetooth functionality test: Making phone calls, listening to music, sending and receiving messages
  3. User scenario simulation: Identify and solve problems by implementing the corresponding solutions with the test array of more than 100 user scenarios
  4. Compatibility test: Generate comprehensive test conditions by taking into account every relevant factor, such as iOS or Android OS, diverse smartphone chipsets, and different service providers.
  5. Long-term stability test: Test the stability performance under stress. For example, play music on the head unit for a long time.
  6. Bluetooth audio performance: Test the DAC (Digital to Analog Convertor) and audio electric network
  7. Bluetooth OTA performance: Test the antenna performance from different angles

Count on the Allion AI Solution—The Powerful Sidekick of Your Head Unit Products

In head unit testing, manual operations take up so much time and human resources to simulate different scenarios. Moreover, as head unit technologies get more and more complicated, it is impossible to manually check every single detail while remaining high consistency.

Following Allion’s test planning, there are more than 10,000 test steps and the total test hours reached 300 hours. Allion AI Solution can automatically identify the exact positions of APPs on the DUT’s monitor and conduct tests using the visual recognition system installed on the AI robotic arms. In addition, with the audio recognition system, the AI algorithms can distinguish sources of sound and make sure that in-car music streaming will be stable enough for a long time. Allion AI Solution can help reduce the complexity of manual interventions and create a seamless experience in head unit testing.

If you have any validation or consulting need with respect to the automotive ecosystem, please contact our AI engineering team or send an email to

Advantages High Efficiency,

High Accuracy

24/7 Real-time Testing, Accelerate the Test Schedule Beyond Human Capabilities Big Data Collection and Analysis
Applications The accuracy of manual testing can reach somewhat 83%-90% but it is easily affected by physical conditions, for example, fatigue.

However, automation testing can always remain 99% accuracy rate or even above.

Working hours for human beings are 8 hours a day. However, robots can run 24 hours non-stop. An increase from 8 to 24 test hours a day suggests that the test schedule is accelerated (2-3 times faster). The Allion AI visual recognition system can solidly supervise the monitor without a break, check all the tiniest details, and capture fleeting actions displayed on the monitor. All of these operations are beyond human capabilities. The Allion AI System can analyze test results by collecting big data, including the test items with the highest error rates. The results can be references for future modifications and test planning.