Bluetooth 5 vs. Bluetooth Channel Sounding
Comparing 2 standards across 13 specifications. 13 key differences identified.
Bluetooth 5 (encompassing v5.0 through v5.3) significantly expanded Bluetooth Low Energy with 2 Mbps high-speed (2M PHY), up to 4x range extension via forward error-corrected Long Range (Coded PHY), 8x advertising broadcast capacity (Advertising Extensions), and Isochronous Channels (v5.2).
Bluetooth Channel Sounding (standardized in Bluetooth Core Specification v6.0) introduces high-precision, secure distance measurement to Bluetooth Low Energy. Utilizing Phase-Based Ranging (PBR) across multiple RF channels combined with Round-Trip Time (RTT) time-of-flight measurements, it delivers centimeter-level spatial accuracy and relay-attack security for digital car keys and item tracking.
Specification Comparison Table
13 Parameters| Parameter / Spec | ||
|---|---|---|
|
Bluetooth Versions
|
v5.0 (2016), v5.1 (2019), v5.2 (2020), v5.3 (2021) | — |
|
2M High-Speed PHY
|
2 Mbps (halves transmission on-air time) | — |
|
LE Coded Long Range PHY
|
500 kbps (S=2) / 125 kbps (S=8, 4x range, up to 1km line of sight) | — |
|
Advertising Payload Capacity
|
255 bytes (up from 31 bytes via secondary channels) | — |
|
Direction Finding (v5.1)
|
Angle of Arrival (AoA) and Angle of Departure (AoD) | — |
|
Isochronous Channels (v5.2)
|
Time-synchronized streams for LE Audio | — |
|
Connection Subrating (v5.3)
|
Fast switching between low-latency and low-power states | — |
|
Bluetooth Specification
|
— | Bluetooth Core Specification v6.0 (2024) |
|
Ranging Technologies
|
— | Phase-Based Ranging (PBR) + Round-Trip Time (RTT) |
|
Target Accuracy
|
— | Centimeter-level (~10 to 30 cm under typical multipath) |
|
Operating Frequencies
|
— | Up to 79 channels stepped across 2.4 GHz ISM band |
|
Security Architecture
|
— | Cryptographically secure Sounding Sequences (Anti-Relay Attack) |
|
Primary Applications
|
— | Automotive digital keys, 'Find My' precision tracking, secure access control |