Thread
Smart Home & Mesh · 7 specs
Direct Answer
Thread is an open, IPv6-based low-power wireless mesh networking protocol developed by the Thread Group, built upon the IEEE 802.15.4 radio standard in the 2.4 GHz band. Using 6LoWPAN encapsulation, Thread devices are directly addressable via standard IPv6, eliminating the need for application-layer translator bridges and serving as the primary network layer for Matter.
Source: Thread Group / IEEE 802.15.4 / RFC 6282 (6LoWPAN) · Last reviewed Aug 28, 2026
Specs
| Underlying Radio Standard | IEEE 802.15.4-2006 (2.4 GHz O-QPSK @ 250 kbps) |
| Network Layer Protocol | IPv6 with 6LoWPAN header compression (RFC 6282) |
| Transport Layer | UDP with DTLS (Datagram Transport Layer Security) |
| Routing Protocol | Distance-Vector (MLE–Mesh Link Establishment) |
| Network Device Roles | Thread Border Router, Leader, Router, End Device (SED) |
| Single Point of Failure | None (Dynamic self-healing leader election) |
| Security Protocols | ECC (Elliptic Curve Cryptography) with AES-128 MAC-layer encryption |
Native IPv6 and Thread Border Routers
Unlike Zigbee or Z-Wave, which require dedicated gateway translation hubs to map proprietary payloads into IP packets, Thread is natively IP-based. Every Thread node possesses a unique standard IPv6 address. A Thread Border Router (built into devices like Apple HomePod, Apple TV 4K, Google Nest Hub, or Amazon Echo) simply routes IP packets between the Thread 802.15.4 mesh and home Wi-Fi/Ethernet networks without reading or converting application payloads.
Self-Healing Architecture Without Central Hub
Thread networks eliminate the single point of failure inherent in Zigbee coordinators. The network dynamically elects a 'Leader' router. If the leader goes offline, another router autonomously assumes leadership without dropping network connections or requiring device re-pairing.