Importance

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Abstract

A Join message load control system in a network using a Protocol Independent Multicast-Source Specific Multicast (PIM-SSM) protocol, the Join message load control system including a source access hop router creating a SOURCE-INACTIVE message and transmitting the created SOURCE-INACTIVE message when a multicast traffic is not received from the multicast server during a set Keep-Alive Time (KAT), and the SOURCE-INACTIVE message including information on an update set time of a PIM Join message; and a group access hop router resetting the update set time of the PIM Join message when the SOURCE-INACTIVE message is received from the source access hop router. Accordingly, it is possible to reduce the periodical transmission of unnecessary Join(S, G) messages and thereby reduce traffic load in a network by adjusting a JP timer of the Join(S, G) message depending on whether a channel(S, G) is active or inactive.

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First Claim