IPSec Compatible TCP Performance Improving Mechanism over Wired-cum-wireless Networks
Ling Xiao · Journal of Chinese Computer Systems · 2007
TCP is originally designed only for wired network and assumes that any loss is due to congestion.However,it is different in wireless situation in that wireless errors are more likely to occur than congestion.At the same time,many exist approach can not work when the encryption is used in the communication.This paper proposed a new end-to-end TCP performance improving mechanism,by using the interval movement cumulated of the packets received time on receiver,that can estimate the wireless link condition.Then it marks the ELN(Explicit loss notification)bit to notify the sender and TCP could be modified so as to refrain from going into congestion avoidance.Comparing the TCP Reno and the modified TCP,by simulations using NS2,the results show it achieves an great improvement over wired-cum-wireless networks and can work together with current security mechanism.