The 2025 Bluetooth Asia Conference has successfully concluded, showcasing a unique Bluetooth wireless world through its conference and forum. Neville Meijers, CEO of the Bluetooth Technology Alliance, mentioned in his keynote speech that "Bluetooth is not just a technology, but a global community with the common goal of meeting basic connectivity needs. The Bluetooth Alliance expects global Bluetooth device shipments to exceed 5.3 billion units by 2025 and reach nearly 8 billion units by 2029." The Bluetooth Asia Conference has three main highlights:
1 The combination of AI and Bluetooth technology is mainly aimed at audio and end-to-end computing;
2. The application of Auracast low-power Bluetooth audio in scenarios; The first and second points of Bluetooth channel sounding in automobiles and IoT are more about the combination of new applications and existing technologies, while the third point showcases a new Bluetooth wireless world - Bluetooth channel sounding. Bluetooth Channel Sounding is an important technology introduced in Bluetooth 6.0, aimed at improving positioning accuracy and suitable for scenarios such as automotive digital keys and asset tracking. For example, in the battle of digital car keys, Bluetooth channel detection, NFC, and UWB, Bluetooth channel detection, as a highlight of BLE 6.0, has improved positioning accuracy and become the mainstream choice for digital car keys. Bluetooth wireless technology has been rapidly advancing and its application areas are becoming increasingly diverse. In the development process of wireless technology, it is becoming a big brother from a little brother, which once again proves that choice is greater than effort. In 2024, domestic Bluetooth chip manufacturers will take off collectively and make a huge profit of 790 million yuan in a year. As one of the core innovations of Bluetooth 6.0, Bluetooth Channel Sounding technology will bring new business opportunities to Bluetooth wireless applications. Through phase ranging (PBR) and round-trip time (RTT) measurements, centimeter level accuracy positioning has been achieved, providing technical support for high-precision scenarios in the automotive and IoT fields. The following will be discussed from three aspects: technical characteristics, application scenarios, and practical cases. Firstly, the principle of Phase Based Ranging (PBR) utilizes 79 physical channels in the 2.4GHz frequency band to calculate distance through multi frequency signal phase differences, solving the accuracy limitations of traditional Bluetooth positioning technologies such as RSSI. Compared with traditional trilateration methods, anti-interference and security are enhanced through dynamic channel switching and bidirectional authentication mechanisms in channel detection, which enhances the ability to resist multipath interference while ensuring communication security. Compatibility optimization works in conjunction with existing Bluetooth protocols such as broadcast and AoA/AoD, enabling low-power deployment without the need for additional hardware, making it suitable for large-scale IoT devices. 2、 The application scenarios in the fields of automotive and IoT include intelligent automotive digital keys. The Star Flash car key equipped on the M9 is based on channel detection technology, which improves positioning accuracy by 5-6 times compared to traditional Bluetooth solutions and achieves centimeter level unlocking. Zhiji L6 supports on-site experience of Bluetooth channel detection technology through Yinji Technology's digital key solution. CEVA's Bluetooth channel detection IP solution for industrial and asset tracking meets the high-precision asset positioning needs in industrial environments, such as warehouse management and equipment tracking. Smart homes and smart cities have precise distance sensing capabilities through Bluetooth channel detection, which can optimize user experience in scenarios such as smart access control and indoor navigation, and reduce deployment costs.
3. Commercialization progress and challenges Standardization process: Bluetooth SIG completed technical specifications in 2024 and showcased derivative applications such as HDT (High Throughput Data Transmission) at the 2025 Bluetooth Asia Conference. Ecological Expansion: Channel detection complements technologies such as Star Flash and UWB, and may achieve multi technology integration solutions in areas such as connected vehicles and AR/VR in the future. Cost and power consumption: Although dedicated hardware is not required, multi-channel switching may increase chip design complexity, requiring a balance between accuracy and device endurance. Overall, Bluetooth channel detection technology is accelerating its transition from standardization to commercialization. Its high precision and low cost characteristics have opened up new application space for the automotive and IoT fields, but further optimization of multi device collaboration and energy consumption performance is also needed.
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