| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To dynamically allow a terminal, which makes a request for getting into a multicast group only through a server of an unspecified transmission source, to get into and get out of a multicast group from the transmission source permitted by a network administrator without modifying the terminal and in response to a request from the terminal in a multicast network in which only the specified transmission source can get into a multicast group. <P>SOLUTION: Based on a multicast group address contained in a request for getting into a multicast group which comes from a terminal 100 for supporting only a multicast where no transmission sources are restricted and a line 116 where the request has occurred, the transmission source server to the multicast network which is permitted by the network administrator is calculated by using a multicast transmission source management table 220. As a result, a multicast router 110 converts a request for getting into the multicast group where no transmission sources are restricted into a request for getting into the multicast group which comes from the transmission source server permitted by the network administrator. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
