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exploring_lora [2019/10/06 13:03] – [5. Coverage Challenge] samerexploring_lora [2019/10/10 11:05] – [4.2. [Classroom activity] Collisions and Packet Delivery Ratio] samer
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 ==== -. Modifying the Radio Parameters ==== ==== -. Modifying the Radio Parameters ====
  
-Download the {{ :sketch-1819.zip | basic sketches}} that implement a simple LoRa communication between two devices: a client and a server. Open the sketches with Arduino IDE. Make sure to choose the correct ''Board'' and ''Port'' in the ''Tools'' menu. +Download the {{ :sketch-1819.zip | basic sketches}} that implement a simple LoRa communication between two devices: a client and a server. Open the sketches with Arduino IDE (it is preferable to run Arduino IDE as administrator). Make sure to choose the correct ''Board'' and ''Port'' in the ''Tools'' menu. 
  
 Take a look at the source code in ''rf95_client.ino'' and ''rf95_server.ino''. Particularly, the following extract from the ''setup'' function configures the radio parameters of your LoRa devices: Take a look at the source code in ''rf95_client.ino'' and ''rf95_server.ino''. Particularly, the following extract from the ''setup'' function configures the radio parameters of your LoRa devices:
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   * Analyze the obtained results and compare with the theoretical computations. You can superpose the theoretical results and the experimental ones on the same graph.   * Analyze the obtained results and compare with the theoretical computations. You can superpose the theoretical results and the experimental ones on the same graph.
 </WRAP> </WRAP>
-==== -. Coverage ==== 
  
-In this section, you will measure the coverage of LoRa under different radio configurations. 
- 
-Start by identifying a set of five geographical locations or Test Points (TP). These TPs should be astutely chosen to explore the limits of LoRa coverage. Then, you should implement a function on the server that measures the ratio of successfully delivered packets or PDR (Packet Delivery Ratio). Now, you should run the experiment for three different radio configurations: such configurations should provide different reliability levels (high, medium, and low reliability).  
- 
-<WRAP center round help 100%> 
-  * Draw the test points on a map and motivate your choices. 
-  * Describe the radio configurations you selected and their impact on the reliability of the transmission.   
-  * Visualise the experimental results by plotting the PDR for each TP and each radio configuration.  
-  * Analyze the obtained results. 
-</WRAP> 
 ==== -. [Classroom activity] Collisions and Packet Delivery Ratio ==== ==== -. [Classroom activity] Collisions and Packet Delivery Ratio ====
  
-In this section, you will measure the impact of the packet arrival rate on the collision rate and consequently the PDR.+In this section, you will measure the impact of the packet arrival rate on the collision rate and consequently the Packet Delivery Ratio (PDR).
  
 The setting for this experiment is unique: The setting for this experiment is unique:
   * Only one server is required in the classroom. This server should compute the ratio of successfully delivered packets or PDR.   * Only one server is required in the classroom. This server should compute the ratio of successfully delivered packets or PDR.
   * All groups are required to use the same frequency, spreading factor, and coding rate.   * All groups are required to use the same frequency, spreading factor, and coding rate.
-  * The average packet arrival rate is equal for all clients. The delay between two packets is drawn uniformly in a predefined interval.+  * The average packet arrival rate is equal for all clients.
  
 <WRAP center round help 100%> <WRAP center round help 100%>
exploring_lora.txt · Last modified: 2021/10/20 12:52 by samer