As part of the bi-annual release cadence, Bluetooth® Core 6.3 has arrived. This update introduces new features that boost ranging precision, expand interface capacity, and improve radio efficiency. Together, these advancements reinforce the Bluetooth Special Interest Group’s (SIG) commitment to continuous innovation and provide developers with tools to meet evolving market demands. 

Key features at a glance 

Bluetooth® Channel Sounding Inline PCT Transfer enhances Bluetooth® Channel Sounding accuracy and efficiency by enabling the reflector to transfer phase-aligned tones directly into hardware. It reduces overhead and speeds up the procedure by eliminating unnecessary data reporting. 

Bluetooth® Channel Sounding PHY-specific RTT Accuracy allows devices to report Round-Trip-Time (RTT) accuracy separately for each PHY, rather than using a single value. This enables better PHY selection, improving precision and interoperability in multi-PHY ranging scenarios. 

Bluetooth® Running Out of Bits expands Host Controller Interface (HCI) capacity by increasing the Supported Commands bitmask and LE Event Mask sizes. This ensures scalability for future features while maintaining backward compatibility. 

Bluetooth® ACP and C/I Limit Relaxation aligns Radio Frequency (RF) requirements between Bluetooth® Classic (BR/EDR) and Bluetooth® LE. It simplifies design targets and enables more power-efficient radio architectures without compromising performance. 

Supporting the release with clear, accessible resources 

To help developers and stakeholders better understand the new features, the Bluetooth SIG has prepared a dedicated Bluetooth® Core 6.3 feature overview paper that includes background context and technical details for each enhancement. Members are also encouraged to refer to the communication guide for supported Bluetooth® functionality to ensure accurate and consistent use of technical terminology in public-facing materials for qualified products. The guide supports unified communication across the industry, helping member companies clearly and effectively convey Bluetooth functionality. 

Reminder: Bluetooth SIG members should avoid referencing the Bluetooth® Core Specification version against which a product was qualified (e.g., Bluetooth® Core 6.3) when describing Bluetooth functionality. Instead, members should focus on clearly communicating the specific Bluetooth capabilities (e.g., Bluetooth features) supported, especially those most relevant to your target customers, in product packaging, documentation, and marketing materials. 

Learn more about the new features and additional updates in Bluetooth® Core 6.3.