Central-office termination apparatus of adaptively changing connection to subscriber-terminal terminator and path switching method

摘要

A central-office termination apparatus includes plural termination devices and a termination device distributor. Each termination device includes a buffer, a subscriber-terminal terminator distributor and a scheduler. The buffer has a through queue and one or more switching queues. The subscriber-terminal terminator distributor transfers a packet meant for one subscriber-terminal terminator under switching to the switching queue, and transfers another packet meant for another subscriber-terminal terminator not under switching to the through queue. The scheduler reads out packets from the switching and through queues. The termination device distributor transfers a received packet to a termination device having the subscriber-terminal terminator registered for which that packet is meant.

主权项

1. An optical line terminal (OLT) connectable to a plurality of optical network units (ONUs), the OLT comprising:
an optical subscriber unit (OSU) distributor configured to receive a plurality of packets, each destined for one of the ONUs, input into the OLT, and to distribute the plurality of packets; and a plurality of OSUs configured to receive the distributed packets, each OSU including
a buffer that includes a through queue and a switching queue,an ONU distributor configured to
determine whether a destination of each distributed packet received by said each OSU is one of the ONUs that is registered in another one of the OSUs,transfer said each received distributed packet to the switching queue if the destination is registered in another one of the OSUs, andtransfer said each received distributed packet to the through queue if the destination is not registered in any other one of the OSUs, anda scheduler configured to read out said each received distributed packet from the switching queue or the through queue.