Evaluation of Method for Multiplexing Communication Routes to Avoid Intentional Barriers

It is common to operate an IT system where client computers in offices in a country access cloud computers in another country via the Internet. However, in some countries including China, network communication is often shut down by governmental bodies, in addition to network outage caused by network attacks. In case of such intentional interruptions, users need countermeasures to avoid them. Here, we propose a method to form bypass routes which consist of application-level gateways and intelligent routers placed at offices where client computers run, to select bypass routes based on the Internet status. A method for applying asymmetric criteria to decide whether to apply bypass routes is proposed for robust operation of Internet based applications. Differential values of network latency are used for detecting intentional barriers through monitoring and analyzing the huge amount of temporal data, and absolute values to determine their ends. Such temporal data analysis knowledge is verified by a network simulator.