Method and system for scheduling cascaded PON
First Claim
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1. An apparatus for coupling between a trunk passive optical network (PON) and a leaf PON, comprising:
- a pluggable uplink module coupled to the trunk PON, wherein the pluggable uplink module conforms to a standard form factor and comprises a trunk-side optical transceiver for communicating with the trunk PON;
a pluggable downlink module coupled to the leaf PON, wherein the pluggable downlink module conforms to a standard form factor and comprises;
a leaf-side optical transceiver for communicating with the leaf PON;
a single 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; and
a printed circuit board (PCB) coupling together the pluggable uplink module and the pluggable downlink module;
wherein the OLT MAC module is configured to;
disable a scheduler of the OLT MAC module;
generate, while the scheduler of the OLT MAC is disabled, a leaf bandwidth-assigning frame for an ONU within the leaf PON by converting a trunk bandwidth-assigning frame received by the ONU MAC from the trunk PON; and
send the leaf bandwidth-assigning frame to the ONU.
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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.
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Citations
24 Claims
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1. An apparatus for coupling between a trunk passive optical network (PON) and a leaf PON, comprising:
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a pluggable uplink module coupled to the trunk PON, wherein the pluggable uplink module conforms to a standard form factor and comprises a trunk-side optical transceiver for communicating with the trunk PON; a pluggable downlink module coupled to the leaf PON, wherein the pluggable downlink module conforms to a standard form factor and comprises; a leaf-side optical transceiver for communicating with the leaf PON; a single 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; and a printed circuit board (PCB) coupling together the pluggable uplink module and the pluggable downlink module; wherein the OLT MAC module is configured to; disable a scheduler of the OLT MAC module; generate, while the scheduler of the OLT MAC is disabled, a leaf bandwidth-assigning frame for an ONU within the leaf PON by converting a trunk bandwidth-assigning frame received by the ONU MAC from the trunk PON; and send the leaf bandwidth-assigning frame to the ONU. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A cascaded passive optical network (PON), comprising:
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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 pluggable uplink module coupled to the trunk PON, wherein the pluggable uplink module conforms to a standard form factor and comprises a trunk-side optical transceiver for communicating with the trunk PON; a pluggable downlink module coupled to the leaf PON, wherein the pluggable downlink module conforms to a standard from comprises; a leaf-side optical transceiver for communicating with the leaf PON; a single 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; and a printed circuit board (PCB) coupling together the pluggable uplink module and the pluggable downlink module; wherein the OLT MAC module is configured to; disable a scheduler of the OLT MAC module; generate, while the scheduler of the OLT MAC is disabled, a leaf bandwidth-assigning frame for an ONU within the leaf PON by converting a trunk bandwidth-assigning frame received by the ONU MAC from the trunk PON; and send the leaf bandwidth-assigning frame to the ONU. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification