Patent ID: 7827243
Filing Date: 2010-11-02
Classification: H04L

Abstract:
1. A method for transmitting a file based on multiplex forwarders on an overlay multicast delivery tree using a session join time interval between members, wherein a session includes a plurality of members and a source, the method comprising the steps of: a) transmitting msg_join_request, which is a session join request message, from a receiver that has not joined the session to the source, and joining the receiver to the session by making the receiver the kth member of the session; b) after the kth member joins the session, transmitting msg_candidates_request, which is a forwarder candidate list request message, from the kth member to the source and receiving at the kth member a forwarder candidate list including a sequence number of the first packet that each forwarder candidate received from a parent in the overlay multicast delivery tree; c) the kth member skipping specific members among members on the received forwarder candidate list; and d) transmitting msg vsource join request, which is a forwarder request message, from the kth member to the other members on the forwarder candidate list excluding the specific members, selecting at the kth member members permitting the request as forwarders, and receiving at the kth member a gift, which is a specific set of data packets, from each of the selected forwarders, wherein the msg_candidates_request states the number of the forwarder candidate desired by the member joining the session.