What are the differences between Classic Bluetooth and BLE in Bluetooth BQB certification?

 What are the differences between Classic Bluetooth and BLE in Bluetooth BQB certification?



The main differences between Classic Bluetooth and BLE (Bluetooth Low Energy) in Bluetooth BQB certification are as follows:


Application Scenarios and Functional Requirements


Classic Bluetooth: Primarily used in high-speed data transmission scenarios such as audio and video, including traditional data transmission industries like speakers, headphones, and automotive electronics. It focuses on meeting the needs for high-speed and stable data transmission between devices, such as high-quality audio stream transmission.


BLE: Emphasizes low power consumption, fast connection, and long range. Suitable for scenarios with stringent power consumption requirements, such as real-time monitoring of health and medical devices and remote control of smart homes. It is mainly used for transmitting small amounts of sensor data or simple control commands.


Testing and Evaluation Standards


RF Compliance Testing


Classic Bluetooth: The testing focuses on ensuring that the device's RF indicators, such as transmit power, receive sensitivity, frequency offset, and modulation characteristics, comply with standards in Classic Bluetooth mode. This ensures that the device can transmit data stably and efficiently within the frequency bands and transmission rates specified by Classic Bluetooth.


BLE: Due to its different modulation scheme and operating frequency band, the RF conformance testing metrics and requirements also differ. BLE focuses more on RF performance in low-power mode, such as transmit power accuracy, receiver sensitivity optimization, and anti-interference capabilities across different frequency bands.


Protocol and Profile Conformance Testing


Classic Bluetooth: Primarily checks whether the device's implementation of baseband, link management, L2CAP, and other protocols in the classic Bluetooth protocol stack conforms to the standard, as well as its compatibility and interoperability across various Bluetooth profiles.


BLE: Focuses on verifying the device's implementation of key protocols such as GAP (General Access Profile) and GATT (General Attribute Profile) in the BLE protocol stack, as well as its functionality and performance in specific BLE profiles.


Certification Process and Requirements


Test Mode: Classic Bluetooth enters UTM signaling mode during BQB certification; BLE enters DTM mode.


Testing Focus


Traditional Bluetooth: Due to its relatively complex functions and application scenarios, the certification process may require testing more functions and features, such as audio quality testing and file transfer testing, to ensure the device's compatibility and interoperability in various traditional Bluetooth application scenarios.


BLE: The certification process is relatively simple, focusing on testing low-power performance, connection stability, and security.

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