Patent ID: 7940713

Claim:
A method for traffic performance improvement and traffic security considering a quality of service (QoS) of an interactive satellite communication system, comprising the steps of: a) storing an Internet protocol (IP) packet that is received from a user terminal connected to a satellite mobile terminal of the interactive satellite communication system and is to be transmitted to a central station through a satellite; b) transmitting acknowledgement for the stored IP packet to the user terminal by acting for the central station, before the stored IP packet is transmitted to the central station; c) analyzing an IP header and a TCP header of the stored IP packet and inserting only traffic type information, which is previously stored in the TCP header, into the IP header of the stored IP packet before the stored IP packet is encrypted, wherein the traffic type information comprises encrypted IP packet as VoIP traffic, web business traffic, or game/moving picture traffic; d) encrypting an IP payload except the IP header of the stored IP packet; e) classifying the encrypted IP packet according to the traffic type information; f) requesting a resource allocation of a return link with respect to the classified IP packet to the central station according to a traffic type based priority; g) transmitting the stored IP packet through the satellite to the central station, and retransmitting an unacknowledged IP packet according to a retransmission request of the central station; and h) decoding the encrypted IP payload into plaintext and then transmitting the decoded IP payload.