cit presentation final be electronics (1)-1.pptx

Mesh networking

1. CHANNABASAVESHWARA INSTITUTE OF TECHNOLOGY ( Affiliated to VTU, Belgaum & Approved by AICTE , N ew Delhi ) ( ISO 9 1 : 2 15 Certified Ins t itutio n) NH 206 (B.H. Road), Gubbi, Tumkur – 572 216. Karnataka. DEPARTMENT OF ELECTRONICS AND COMMUNICATION ENGINEERING 2023-2024 TECHN I C A L S E MIN A R ON BLUETOOTH MESH NETWORK WITH BROADCAST STORM GUIDE: Mr. Maltesh Bajantri Assistant professor Dept of ECE, CIT Gubbi,Tumkur PRESENTED BY : NAYANA K V [ 1CG 16 EC0 62 ]

2. Contents Introduction Objective Bluetooth mesh architecture Advantages Dis a dvantages Applications Example Conclusion Reference

3. Introduction Bluetooth technology has rapidly developed and become the preferred technology for wireless audio devices and computers peripherals achieving great success. The Bluetooth low power technology launched in 2010, which quickly impacted field such as smart phones, smart homes, mobile health and wire able devices. Bluetooth low energy supports broadcast mode which allows a device to transmit data to an unlimited number of receivers. Therefore bluetooth low energy has become the foundation of bluetooth mesh. The bluetooth mesh profile was released in 2017. The wireless communication system on bluetooth mesh technology has been proven to be an effective solution for providing large scale coverage, expanding range and improving relilience .

4. Objective Earlier Versions of Bluetooth supported two different topologies: One to One : when two BLE devices are connected. One to Many:- When BLE devices operate exclusively in the Broadcast state, such as Beacons. Now BLE Mesh: Introduced a new topology for BLE: Many-to-may. This is generally referred to as mesh topology. Where many mesh devices can communicate with many other mesh devices within the same network using mesh nodes. This Essentially creates large Scale device networks that can be used for a variety of IOT applications. Fig: 1 The Three topological structures.

5. Bluetooth Mesh Architecture

6. Bluetooth low energy Layer: Bluetooth mesh builds on top of BLE, So if requires a full BLE stack to be running on the device. Bearer Layer: The bearer layer defines how the different layer defines now the different mesh packets are handled. There are two types of bearers. Advertising bearer: This bearer utilizes the advertising and scanning states of BLE devices. GATT Bearer : This bearer utilizes the connection state of BLE devices. If always non-mesh supporting devices to interact with the mesh network via GATT Operations. 3. Lower transport layer: This layer handles two main tasks:- Segmentation of packets from the layer abone . Reassembly of pockets from the large below 4. Upper Transport buyer:- This layer is Responsible for the following functinalities Encryption Decryption Authentication Transport Control Messages

7. 5. Access Layer :- This layer defines how the application uses the upper transport layer. It handles the following tasks:- Application data format Encryption and decryption Data Verification 6. Foundation Models Layer: This layer is concerned with network configuration and network management models. 7. Models Layer: This layer addresses the implementation of models, including behaviors, messages, states and state binding.

8. Advantages Increase system scale with hundreds of devices in a subnet. Extend range from gateways or mobile devices with multi – hop communication. enable cloud connectivity via smart phones. Improve system reliability with self-heating networks. Reduce power consumption with shorter transmission distances between devices. Enable Bluetooth becoming and beacon discovery capabilities in mesh nodes.

9. Disadvantages Like wireless mesh, Bluetooth mesh topology is more complex and it is difficult to build and maintain. Bluetooth mesh is not applicable for transmission of audio and video. Bluetooth mesh supports lower bandwidth compare to wifi and hence it is used for transmission of small size commands used for Open/Close functionalities such as light ON or OFF

10. Applications Smart Lighting Asset Tracking Home automation Example: Publish and subscribe in a Bluetooth mesh Network

11.  This is an example of a Mesh network in a home that’s composed of 6 light suitches and 9 light bulbs. The network utilizes the publish subscribe method t allow nodes to lend message to each other. Nodes may subscribe to multiple addresses an example of this is light its in the above figure which is subscribed to both the kitchen and the dining room group addresses. Also multiple nodes may publish to the same address such as switches # 5 and # 6 in these two switches control the same group of lights located in the garden.

12. Conclusion While some may say that Bluetooth mesh has had a slow adoption rate, there’s still real potential for it to enable IOT applications in the near future . BT Mesh is an emerging technology that can support IoT environments with reliable communications . This paper provides an overview of BT Mesh that includes a brief description of the elements in BT Mesh protocol stack and details about different node types. The real-life implementation of BT Mesh are also presented with its performance. Further, the suitability of BT Mesh to IoT applications is discussed in terms of scalability, flexibility, robustness, responsiveness, integrated functionality, security, and energy efficiency

13. References: [1] Bluetooth SIG. Specification of the Bluetooth System. Accessed: Jul. 5, 2023. [Online]. Available: https://www.bluetooth.com/specifi cations /specs/ [2] Bluetooth SIG. Mesh Profile. Accessed: Jul. 5, 2023. [Online]. Available: https://www.bluetooth.com/specifications/specs/ [3] Q. Wan and J. Liu, "Smart-home architecture based on Bluetooth mesh technology," 1OP Conf. Ser., Mater. Sci. Eng., vol. 322, Mar. 2018, Art. no. 072004, doi : 10.1088/1757-899x/322/7/072004. [4] S. M. Darroudi , C. Gomez, and J. Crowcroft , "Bluetooth low energy mesh[4 networks: A standards perspective," IEEE Commun . Mag., vol. 58, no. 4, pp. 95-101, Apr. 2020, doi : 10.1109/MCOM.001.1900523. [5] I. Natgunanathan , N. Fernando, S. W. Loke , and C. Weerasuriya,"Bluetooth low energy mesh: Applications, considerations and cur- rent state-of-the-art," Sensors, vol. 23, no. 4, p. 1826, Feb. 2023, doi : 10.3390/s23041826. [6] S. Darroudi and C. Gomez, "Bluetooth low energy mesh networks: A survey," Sensors, vol. 17, no. 7, p. 1467, Jun. 2017, doi : 10.3390/s17071467.