The Bluetooth Special Interest Group has officially released Bluetooth Core 6.3 as part of its twice-a-year update cycle. This version introduces several under-the-hood changes aimed at improving distance measurement, expanding controller interface capacity, and streamlining radio behavior across different Bluetooth modes.
One of the more meaningful upgrades focuses on ranging accuracy. The update lets reflectors send phase-aligned signals directly to hardware, which should improve both precision and efficiency in Bluetooth channel sounding. By cutting unnecessary reporting, the new approach can also reduce system overhead and speed up parts of the measurement workflow.
The release also improves how devices report round-trip time precision. Instead of using a single value across the board, equipment can now provide separate measurements for each PHY. That should help optimize PHY selection and improve interoperability in multi-PHY distance-measurement scenarios.
Another practical change is a larger command and event mask size in the host controller interface, giving more HCI capacity for future features while keeping backward compatibility with current devices. The SIG also says the new specification continues to align classic Bluetooth and Bluetooth LE radio requirements more closely, which can simplify design targets and support more power-efficient RF architectures without sacrificing performance.
At the same time, the organization reminded members not to market products by citing the Bluetooth core version number alone. Instead, product materials should describe the actual Bluetooth features being supported, especially the ones that matter most to end users.
