Strange communication issue (TCP through Wifi)
Shiv Shankar
Hello, I'm new to this forum. I noticed something strange in my simulation. Though I was unable to solve this issue, I was able to find the scenario that caused this issue. I recreated this scenario on my script and have attached it below.
NS-3 Version: ns3-dev (Installed a month ago)
STA: Wifi Station
AP: Wifi Access Point
Background: We have 5 wifi stationary (fixed position) AP nodes placed at an even amount of distance from each other. We have 1 STA node which will move from AP 1 to AP 5 (back to) AP 1 to AP5 (back to) AP 1 using Waypoint Mobility Model. Here, the STA device will auto associate with AP from time to time which is the default by NS-3 (StaWifiMac). All WIFI devices are set fixed range of 40 meters using RangePropagationLossModel.
When STA associates with an AP, it'll start transferring data through the TCP protocol.
Expected: The STA will successfully associate with any AP in the range from time to time and successfully transfers data through TCP.
What we got: We did get the expected results but only for "some time". When the STA device reaches back to AP 1 (simulation time around 120s), it DOES NOT transfer any data to this AP device. Though it was initially working the way it should, this behavior was unexpected.
Goal: We wanted to build a simulation where STA devices will associate with AP devices from time to time and transfer any amount of data successfully.
I had gone through the documentation and done rigorous debugging. Unfortunately, I was unable to figure out why this is happening this way.
Any help is very much appreciated. Thank you.
Regards
Shiv.