Differences

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--- exploring_lora [2018/09/29 22:53] – [4.1. Time on Air] samer
+++ exploring_lora [2018/09/29 23:26] – [4.3. [Classroom activity] Collisions and Packet Delivery Ratio] samer
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 In this section, you will measure the coverage of LoRa under different radio configurations.
-For this, you will start by identifying a set of 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 for three different radio configurations. Such configurations should ensure different reliability levels.
+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. Now, you should run the experiment for three different radio configurations: such configurations should ensure 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.
@@ Line 144: / Line 145: @@
 ==== -. [Classroom activity] Collisions and Packet Delivery Ratio ====
-In this section, you will measure the impact of collisions on the network throughput using different transmission periods.
+In this section, you will measure the impact of the packet arrival rate on the collision rate and consequently the PDR.
 The setting for this experiment is unique:
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   * 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.
+  * On each client, packets will be generated following a Poisson process with the same average arrival rate for all groups.
 <WRAP center round help 100%>
-  * Draw the PER as a function of the transmission period. Analyze your results.
+  * Draw the PDR as a function of the average arrival rate. Analyze your results.
-  * What type of mathematical models enables to theoretically compute the PER?
+  * What type of mathematical model enables to theoretically compute the PDR? Verify the obtained results.
 </WRAP>
 ===== -. Coverage Challenge =====