| 摘要 |
On each client nodes, 1-2, 1-3, 1-4, the same downstream signal at an identical wavelength is selectively received by one drop port, and an upstream signal at a specific wavelength of »0 is sent to the optical ring network by one add port. On a single node 1-1, which serves as a server node, the upstream signals sent, one from each of the client nodes at the specific wavelength of »0, is received by one and the same drop port in a time division manner. This arrangement makes it possible for the server node, the sender of multicast or broadcast distribution, to correctly receive an ACK signal according to IP, so that bi-directional communication becomes available between the sender (server) node, which initiates the multicast or broadcast communication, and other receiver (client) nodes. |
