| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To obtain a center side device in an optical access network, multicast communication method and apparatus, and optical access network in which multicast services are achieved without deteriorating bands or quality of out-of-multicast data packets. <P>SOLUTION: Data packets sent from a router 201 are sent out as multicast data packets and out-of-multicast data packets by an L2 switch 202 and received in a center side device 203 while being separated. Multicast data packets are allocated to relevant PON interface panels 213 by a multicast control panel 212, copied and sent out. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
