METHOD FOR COMPOSING RETRANSMISSION TREE TO SUPPORT RELIABLE MULTICAST COMMUNICATION

摘要

PURPOSE: A method for composing a retransmission tree to support a reliable multicast communication is provided to support the reliable multi-communication by restricting the number of receivers who can be included in a retransmission area. CONSTITUTION: Recipients who wish for participation transmits a participation message including intermediate link information to a session generator(S1). The A sorting of each last path address transmitted to a sender is performed(S2). A primary group is generated(S3). The B sorting of addresses is performed according to the primary group(S4). A secondary group is generated(S5). The C sorting of addresses is performed according to the secondary group(S6). A tertiary group is generated(S7). It is confirmed whether the number of each tertiary group member is over "N"(S8). The D sorting of link addresses is performed according to each group(S9). It is confirmed whether the number of each tertiary group member is over "n"(S10). A quaternary group is generated(S11). The generator determines a designation resender of each tertiary or quaternary, a next designation resender, and a retransmission domain, and unicasts the designated fact to the designation resender(S12). The designation resender multicasts the designated fact to recipients who exist in one's own retransmission domain(S13).