Method and system for scheduling cascaded pon
AssigneeTibit Communications, Inc.
InventorEdward W. Boyd
Life of this patent
Estimating the term…
Abstract
One embodiment provides an apparatus for coupling between a trunk passive optical network (PON) and a leaf PON. The apparatus includes a trunk-side optical transceiver coupled to the trunk PON, a leaf-side optical transceiver coupled to the leaf PON, and an integrated circuit chip that includes an optical network unit (ONU) media access control (MAC) module, an optical line terminal (OLT) MAC module, and an on-chip memory.
Claims25
An apparatus for coupling between a trunk passive optical network (PON) and a leaf PON, comprising:
- a trunk-side optical transceiver coupled to the trunk PON;
- a leaf-side optical transceiver coupled to the leaf PON;
- and
- an integrated circuit chip that includes an optical network unit (ONU) media access control (MAC) module, an optical line terminal (OLT) MAC module, and an on-chip memory.
A cascaded passive optical network (PON), comprising:
- a trunk PON;
- one or more leaf PONs;
- and
- one or more bridges coupling the trunk PON to the one or more leaf PONs, wherein a respective bridge comprises:
- a trunk-side optical transceiver coupled to the trunk PON;
- a leaf-side optical transceiver coupled to a leaf PON;
- and
- an integrated circuit chip that includes an optical network unit (ONU) media access control (MAC) module, an optical line terminal (OLT) MAC module, and an on-chip memory.
A method for scheduling upstream transmission in a cascaded passive optical network (PON) comprising a trunk PON and one or more leaf PONs, the method comprising:
- receiving, by a bridge device coupling between the trunk PON and a leaf PON, a plurality of bandwidth-requesting frames from a plurality of logical links within the leaf PON;
- generating a plurality of bandwidth assignments based on the received bandwidth-requesting frames;
- storing the bandwidth assignments in a bandwidth-assigning queue;
- assembling a single bandwidth-requesting frame based on the bandwidth assignments;
- sending the single bandwidth-requesting frame upstream to an optical line terminal (OLT) in the trunk PON;
- receiving, from the OLT in the trunk PON, a single bandwidth-assigning frame in response to the single bandwidth-requesting frame;
- generating a plurality of new bandwidth-assigning frames based on the received single bandwidth-assigning frame and the bandwidth assignments stored in the bandwidth-assigning queue;
- and
- sending the new bandwidth-assigning frames downstream to the logical links within the leaf PON.
Dependencies are inferred from the claim text.