[tcpm] Discussion on whether the TCP four-wave mechanism can be simplified to three-wave mechanism

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IEFT Hello, I am a Chinese computer major student, I have an idea is to study the TCP four wave mechanism, if one party still has data to pass, continue to open the connection. However, if both parties have no more data to transmit at a given moment, can it be possible to dispense with one wave, thus turning four waves into three? (Go straight back to the finally state at the end of the third time.) For example, is it feasible to go directly to the last step, that is, to change from the original four waves to three waves? Is there a theoretical basis for this assumption and the possibility of practical application?
 
Thank you, looking forward to reply!
 
I wish all the best!
Yang Zhiyuan
August 23, 2024