I am simulating IEEE 802.11 ac in NetSim. The throughput of TCP is only about 60% of that of UDP. Is this correct? Am I setting some parameter incorrectly? Are they good references for TCP vs. UDP throughput comparisons?
In case of TCP, there are two interacting mechanisms that will govern the throughputs that the individual users will get:
1. The Wi-Fi medium access control (MAC) determines how the mobile devices obtain access to the wireless medium.
2. The end-to-end protocol, TCP, controls the sharing of the wireless bandwidth between the ongoing data transfers.
Now, the TCP receiver returns an ACK for every received packet. Therefore if the AP sends N packets, and each of the STAs must send back N ACKs.
Whereas in case of UDP there are no ACKs being sent back by the STA. Hence the entire WiFi capacity can be used for data download.
Therefore the throughput when using TCP would be much lower than that of UDP.
You can use parameters like,
1. packets loss % (TCP Vs UDP)
2. Error packets %
You could see https://www.researchgate.net/post/Data-rate-calculation-for-80211-ac
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