Patent ID: 8068439

Claim:
A method of Concurrent Multipath Transfer (CMT) which is based on the relational paths, comprising the steps of: (a) initializing a sending timer of a packet and clearing a flag of fast retransmit before sending the packet; (b) sending the packet in one of several paths having differing performance characteristics and opening the sending timer of the packet; (c) increasing a lost report counter of the packet if receiving a gap report of the packet from any one of said paths having differing performance characteristics by the following packets which arrive receiver before the packet; (d) setting the flag of fast retransmit if the sending timer of the packet expires; (e) retransmitting the packet if the lost report counter is larger than a threshold and the flag of fast retransmit is set; (f) increasing a continuous fast retransmit counter after fast retransmit; and (g) processing a timeout of sending in TCP's Retransmission Timeout Mechanism if value of continuous fast retransmit counter is bigger than 0 and is multiples of 3.