Importance

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Abstract

An assistant data transmission method for client sides behind routers particularly comprises steps as follows: data exchange based on Universal Plug and Play between a first client side at an A1 port of a first router and a second client side at a B1 port of a second router fails; network communications with a middleware server is created by the first client side at an A2 port of the first router and by the second client side at a B2 port of the second router and network communications surveillance is activated by the first client side at an A3 port of the first router and the second client side at a B3 port of the second router; the middleware server transmits received information such as physical network positions and opened external ports of the first router and the second router to the first client side and the second client side; a handshaking procedure for data exchange between the first client side and the second client side is executed by the first client side at the A3 port and the second client side at the B3 port when communications between the first client side at the A2 port and the second client side at the B2 port is unavailable and confirmed by both sides.

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First Claim