I am currently working on evaluating the effects of communication load on generation of Cooperative Awareness Messages. For this, I am using Artery with veins for simulating the 802.11p stack. From my simulation, I observed that I was only getting an effective communication range of about 100m using the default communication parameters given in Config veins in the omnetpp.ini file. After going through other related questions like, (Change the transmission signal strength for a specific set of vehicles during the run-time), I know that increasing the value of *.node[*].nic.mac1609_4.txPower should help in increasing the communication range. However, I am not noticing any change in the observed communication range by either increasing or decreasing this value.
Since I am quite new in using Artery with Veins, I am not sure if there is something else that we need to do for increasing the communication range of the vehicle.
Just a bit more detail on how I am calculating the communication range. I have two vehicles A and B. I have set the speed of vehicle A to be 4m/s and Vehicle B to 0.01 m/s (such that it is almost at standstill). Based on the CAM generation conditions both vehicles at these speeds would generate a message every second. I have a straight road segment of 700m with two lanes and both the vehicles are generated at the same time in lanes 0 and 1 respectively. Based on the speed of vehicle A, it should take 175s for Vehicle A to leave the road segment. Observing the generated .sca file at the end, I see that the ReceivedBroadcasts + SNIRLostPackets = 28 for both the vehicles meaning that only for the first 28s (28*4 = 112m) both the vehicles were at range. I tried it with different values of txPower and sensitivity but I am still getting the same result.
Thanks for your help
Update
I have added the screenshots of the message that I am receiving during successful packet reception and packet loss due to either errors or due to low power levels.
Successful Reception
Reception with error
No reception
Based on the logs it seems that the packets are lost as the power measured at the reciever side is lower than the minPowerLevel. I have found out that minPowerLevel can be set by changing the value of *.**.nic.phy80211p.minPowerLevel in the omnetpp.ini file, but could someone let me know how the Rx power is calculated (in which file)?