Objectives
COMP4336/9336 Mobile Data Networking
Lab 6: Observation of Bluetooth Low Energy Frequency Hopping
• To observe and analyse BLE (Bluetooth 4) Frequency Hopping (Algorithm #1)
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Prerequisites
• Access to MATLAB (All UNSW students have free access to MATLAB)
• Knowledge of Bluetooth 4 (BLE) frequency hopping Algorithm #1. This is covered in Lecture 5. You can also access more details of this algorithm from the following core Bluetooth
document (page 2644): https://inst.eecs.berkeley.edu/~ee290c/sp18/note/BLE_Vol6.pdf Your Tasks
1. Read Lecture 5 notes, listen lec5-video, and master the concept of Bluetooth frequency hopping in general and BLE fixed hop increment frequency hopping algorithm, a.k.a. Algorithm #1.
2. Install MATLAB and Communications ToolboxTM (UNSW provides free license to all students). Available from the following URL: https://www.it.unsw.edu.au/students/software/matlab.html
3. Read the Bluetooth frequency hopping example provided by MATLAB, which can be accessed at URL: https://au.mathworks.com/help/comm/examples/ble-channel-selection- algorithms.html#BLEChannelHoppingExample-28
4. Open the frequency hopping example in Matlab by running the following command:
openExample(‘bluetooth/BLEChannelHoppingExample’)
A new file will be opened in Editor and you should click on the Run button to execute it. You are not going to edit the code or understand all the lines. After running the example, answer the following questions and submit them as a PDF report:
1- Explain Algorithm #1’s calculations and equation when unmappedChannel is a good channel. (1 mark)
2- Explain algorithm #1’s calculations and equation when unmappedChannel is a bad channel. (1 mark)
3- Use the “graphical user interface” in the example to run algorithm #1. Now consider that, in the vicinity of the Bluetooth network, a 2.4GHz WLAN is operating on WiFi Channel 1. Work out and select the good and bad channels for this scenario. Select a hop increment of your choice, set the number of channel hops to 10, tick the Visualization and generate the hopping sequence for these 10 hops. Add the resulting figures to your report and explain the figures in one paragraph. (2 marks)
Penalty at the rate of 5% for each day late will be strictly enforced for all lab submissions. All submissions will be subject to strict UNSW plagiarism rules.
End of Lab 5 – Hope you enjoyed this lab.
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