Bluetooth 5
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- BLE mesh networking allows Bluetooth devices to communicate over greater distances by relaying messages through intermediate nodes, enabling new IoT applications. It builds on BLE to define nodes, messages, and models for publishing and subscribing to sensor data and controlling devices. While BLE mesh has limitations regarding message size and latency, its integration with Bluetooth and large ecosystem make it suitable for some IoT use cases.
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Bluetooth 5
- 3. Devices connected to the internet
- 4. What we will cover • Introduce BLE • Role of Bluetooth 5 in the Internet of Things • New features that facilitate IoT applications • Comparison with other technologies
- 5. Introduction to 5G- Bluetooth • Long Existence • Improved range • Mesh Functonality • Bandwidth • Broadcasting and co-existent features
- 6. Role of Bluetooth 5 in IoT • Connecting sensors and devices • Improving range with mesh network • Mesh increases newer applications’ • Coexisting with other technologies • Spec sheet covers both BLE and Bluetooth Classic
- 8. BLE mesh • July 2017 • Extend range of Bluetooth • Support industrial applications
- 9. BLE Mesh • Nodes • Messages • Publish/Subscribe • Models • Scenes One to One One to Many Many to Many
- 10. Basics of BLE Mesh • Build on top of BLE • Utilizes advertising state • No connections • Supports back upto BLE 4.0 (all versions) • Currently doesn’t support Bluetooth 5 features (extended advertisements, long range mode)
- 12. Terminology • States: ON/OFF for light bulb • Properties: add context to state • State transitions
- 13. Messages • Sent between nodes • Control, relay information or report status • Defined via unique opcodes • Two categories • Acknowledged • Unacknowledged • Three types: get, set and status
- 14. Addresses • Identify source and destination of a message • Types • Unicast address: uniquely identifies the node assigned during programming • Group address: identifies a group of nodes, SIG fixed or dynamic • Virtual address: assigned to one or more elements (spanning one or more nodes)
- 15. Comparison with Thread and Zigbee • Ecosystem due to Cell Phone support • Large BLE mesh needs relay optimisation • Works best for less than 11 bytes for multicast messages • Has high latency
- 16. Mesh System
- 17. Models • Defines some functionality of a given element • Three categories: • Server Model • Client Model • Control Model • Models can be extended
- 18. Conclusion • Not the best but built in ecosystem makes it easier to implement • Small reach and area •Questions?
Editor's Notes
- So a couple of years ago, we had an introduction of a new standard for Bluetooth. Bluetooth 5.0. This is a gap of six years after the adoption of Bluetooth 4.0 Bluetooth SIG has released the standard for Bluetooth 5.0 This version is mainly suited for the cellphones that help to connect the smart watch and earphone with HD voice and also faster transfer of data between the neighbouring devices. As it has a dual audio support, we can have a stereo effect. It is also a way the new standard will redefine the way people view the internet of things.
- As in this picture you can see there are 2 classes of devices. Mainly headphones, smart glass, laptop, camera. These are multimedia devices and are continuously used by people. These devices need high bandwidth. There is also another class of devices such as the things we use can be made smart like the light bulb. Chair, aircon, washing machine and many more. These devices do not need Hi speed connection to send the data. Hence they can use BLE which we will talk ahead in later slides. Now Bluetooth is thriving on the fact that it can communicate beyond audio and stereo communication such as IoT and M2M communication. This goal is accomplished thanks to the technology’s maturity and strong presence in the market place.
- So when the computer revolution began we had 1 billlon devices by 1990. At this time internet was nascent with the dialup modems with 56kbps. Now we have 4g with LTE with about 100Mbps. As these connections are very high speed, they also consume a lot of power. There are other devices such as chairs, AC, Geyser, Fan, lights, Car which can be connected to the internet.
- BLE is a variant of Bluetooth which caters to low data
- As discussed in the first slide of the improvements of over the 4th generation is the longer range and introduction of BLE mesh.
- Under the mesh if the device used is a light bulb, then it is called as element
- Out door or indoor temperature Change state from one to another over time or instantaneously
- Acknowledgement serves 2