PACKET DISTRIBUTION METHOD, PACKET DISTRIBUTION SYSTEM, TRANSMITTER, ROUTER DEVICE, AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To have a multicast distribution without enlarging the header size and exerting status management via a router.

SOLUTION: A transmitting source 10 expresses a distribution route where packet distribution routes are indicated in a tree structure in a packet for output to a router 11. The router 11 eliminates Port 3 from the tree structure to output the packet to Port 3. A router 12 also eliminates a Port 2 and Port 3 from the tree structure, outputs the packet, where a descendant element (empty class) of Port 2 is expressed, to Port 2, and outputs the packet, where a descendant element (Port 2) of Port 3 is expressed, to Port 3. Hence, the routers 11 and 12 output the packets to the expressed ports while updating the element corresponding to itself out of the distribution routes expressed in the packets.

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