Bluetooth mesh networking: Difference between revisions

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Latest revision as of 10:24, 25 August 2025

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| name = Bluetooth mesh networking

| image = Bluetooth logo (2016).svg

| standard =

| developer = [[Bluetooth Special Interest Group|Bluetooth SIG]]

| introdate = {{Start date|2017|07|13}}

| industry = [[Lighting]], [[Internet of things|IoT]]

| connector =

| hardware =

| range = 100-1000100–1000 meters (depending on mesh relaying configuration)

}}

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== Overview ==

Bluetooth Mesh is a [[mesh networking]] standard that operates on a [[Flooding (computer networking)|flood network]] principle. It's based on the nodes relaying the messages: every relay node that receives a network packet that

* authenticates against a known network key that
* is not in message cache, that
* has a TTL ≥ 2

can be retransmitted with TTL = TTL -− 1. Message caching is used to prevent relaying messages recently seen messages.

Communication is carried in the messages that may be up to 384 bytes long, when using Segmentation and Reassembly (SAR) mechanism, but most of the messages fit in one segment, that is 11 bytes. Each message starts with an opcode, which may be a single byte (for special messages), 2 bytes (for standard messages), or 3 bytes (for vendor-specific messages).

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|}

== TopologyTypes of nodes ==

Nodes that support the various features can be formed into a particular mesh network topology.

{| class="wikitable"

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A key unique to a device known as "Device Key" is derived from elliptic curve shared secret on provisioner and device during the provisioning process. This device key is used by the provisioner to encrypt messages for that specific device.

The security of the provisioning process has been analyzed in a paper presented during the [[IEEE Communications Society|IEEE CNS]] 2018 conference.<ref>{{Cite book|last1=Adomnicai|first1=A.|last2=Fournier|first2=J. J. A.|last3=Masson|first3=L.|title=2018 IEEE Conference on Communications and Network Security (CNS) |chapter=Hardware Security Threats Against Bluetooth Mesh Networks |date=2018-05-30|pages=1–9|chapter-url=https://ieeexplore.ieee.org/document/8433184|doi=10.1109/CNS.2018.8433184|isbn=978-1-5386-4586-4|s2cid=52004479 }}</ref>

The provisioning can be performed using a Bluetooth GATT connection or advertising using the specific bearer.<ref name=":0" />

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|-

|Tonly SIG Mesh Stack<ref>{{Cite web|url=https://launchstudio.bluetooth.com/ListingDetails/RedirectFromQdid/130160|title=QD ID 130160 {{!}} Launch Studio - Listing Details|website=launchstudio.bluetooth.com|access-date=2019-05-06}}</ref>

|[[Tonli|Shenzhen Tonli Science and Technology Development Co., Ltd]]

|{{Dts|2019-05-05}}

|130160