Topology Options | Bluetooth Technology Website

Devices need multiple ways to connect

To best meet the wireless connectivity needs of a diverse developer population, Bluetooth® technology supports multiple topology options.

From simple point-to-point connections for streaming audio between a smartphone and speaker, to broadcast connections that enable way-finding services in an airport, to mesh connections that support large-scale building automation, Bluetooth supports multiple topology options to best meet the unique wireless connectivity needs of a diverse, global developer population.

Point-to-Point

Point-to-point is a network topology used for establishing one-to-one (1:1) device communications. The point-to-point topology available on Bluetooth Basic Rate/Enhanced Data Rate (BR/EDR) is optimized for audio streaming and is ideally suited for a wide range of wireless devices, such as speakers, headsets, and hands-free car kits. The point-to-point topology available on Bluetooth Low Energy (LE) is optimized for data transfer and is well suited for connected device products, such as fitness trackers, health monitors, and PC peripherals and accessories.

 

Broadcast

Broadcast is a network topology used for establishing one-to-many (1:m) device communications. The broadcast topology available on Bluetooth LE is optimized for localized information sharing and is ideal for location services such as retail point-of-interest information, indoor navigation and wayfinding, as well as item and asset tracking.

 

Mesh Networking

Mesh is a network topology used for establishing many-to-many (m:m) device communications. The mesh topology available on Bluetooth LE enables the creation of large-scale device networks and is ideally suited for control, monitoring, and automation systems where tens, hundreds, or thousands of devices need to reliably and securely communicate with one another.

 

Bluetooth Low Energy (LE)Bluetooth Basic Rate/
Enhanced Data Rate (BR/EDR)
Point-to-Point (1:1 device communication)
Optimized For…Short burst data transmissionContinuous data streaming
Setup time<6 ms100 ms
Max connections/ device (piconet)Unlimited (implementation specific)7
Data rate125 Kb/s to 2 Mb/s1 Mb/s to 3 Mb/s​
Max payload size251 byte​1,021 byte​
Security128-bit AES, user defined application layer​64b/128b, user defined application layer​
Service definitionGATT Profiles​Traditional Profiles​
GATT Profiles
Broadcast (1:m device communication)
Max payload sizePrimary Channel: 31 byte​
Secondary Channel: 255 byte​
Chaining of packets for larger messages
Not Applicable
SecurityUser defined application layer
Service definitionBeacon Formats
(not specified by Bluetooth SIG)​
Mesh (m:m device communication)
Max nodes32,767Not Applicable
Max subnets4,096
Message addressingUnicast, Multicast, Broadcast​
Up to 16,384 group addresses​
Supports publish/subscribe addressing​
Message forwardingManaged flood
Max payload size29 byte payload
Security128-bit AES​
Device, network and application levels​
Service definitionMesh Models, Mesh Properties

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