RFPipe PCR curve issue about emane HOT 5 OPEN

The RF Pipe model is a very simplistic model that does not account for interference due to in-band collisions from multiple transmitters. You can update the model to add that feature or develop a new model that supports the specific channel access effects and features you are looking to emulate. Feel free to review existing opensource models (TDMA, IEEE802.11abg, LTE) which account for in-band collisions with their own unique implementations. The linear PCR curve provided is simply as a place holder and can be replaced with a curve which represents your waveform's behavior. Also, the documentation for PCR states the following: "Specifying a packet size (<table> attribute pktsize) in the curve file will adjust the POR based on received packet size. Specifying a pktsize of 0 disregards received packet size when computing the POR." So, if you want completion rates to change based on packet size, you have to set the packet size to a non-zero value and make sure the curve is representative of that non-zero packet size you set. kb Kaushik B. Patel Adjacent Link LLC

Disregarding packet size in this reference means the same PCR curve is used regardless of the actual packet size that is received. So, when "pktsize" is set to 0 in the curve file, you are basically telling the receiving node to compute the PCR based on the received SINR only. Again, if you look at the documentation, it states the following: "The POR is obtained using the following calculation when a non-zero pktsize is specified: POR = POR0^(S1/S0)" So what that means is, if you specify a packet size of 0 in your curve file, your POR will always be POR0 obtained from your curve file for the received/computed SINR. Whether you send a 100 byte packet or a 1000 byte packet, the POR will be the same if the SINR is the same. It might be worthwhile for you to try the following simple tests using 2 nodes: Test-1: 1. Use the default curve file with "pktsize" set to 0. 2. Adjust the pathloss between two nodes so the SINR = 10. 3. Send a stream of 100 byte packets and see what your completion rate looks like. 4. Send a stream of 1000 byte packets and see if the completion rate changes. Hint: It should not. Test-2: 1. Change the "pktsize" parameter in your curve file to 128 Bytes. 2. Keep the pathloss from above so the SINR = 10. 3. Send a stream of 100 byte packets and see what your completion rate looks like. 4. Send a stream of 1000 byte packets and see if the completion rate changes. Hint: It should based on the above POR formula. kb Kaushik B. Patel Adjacent Link LLC CEO, Director of Engineering 908.655.5079 ***@***.***