Method and apparatus for link sharing among multiple EPONs
First Claim
1. An optical line terminal (OLT) in an Ethernet passive optical network (EPON), the OLT comprising:
- a plurality of optical transceivers, each optical transceiver from among the plurality of optical transceivers being configured to transmit a downstream signal from among a plurality of downstream signals to a corresponding optical network unit (ONU) group from among a plurality of ONU groups, each ONU group from among the plurality of ONU groups including a plurality of ONUs;
a downstream media access control (MAC) interface configured to provide a downstream control signal;
a splitter configured to split the downstream control signal into a plurality of sub-signals, each sub-signal from among the plurality of sub-signals controlling transmission of a corresponding downstream signal from among the plurality of downstream signals; and
a plurality of upstream MAC interfaces configured to arbitrate a plurality of upstream signals received from the plurality of ONUs of each ONU group, wherein each upstream MAC interface from among the plurality of upstream MAC interfaces is further configured to independently control a corresponding optical transceiver from among the plurality of optical transceivers to arbitrate the plurality of upstream signals.
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Accused Products
Abstract
One embodiment of the present invention provides an optical line terminal (OLT) in an Ethernet passive optical network (EPON). The OLT includes a number of bi-directional optical transceivers. At least one bi-directional optical transceiver is coupled to an optical network unit (ONU) group that includes a number of ONUs. The OLT further includes a first downstream media access control (MAC) interface configured to provide a first downstream control signal and a splitter configured to split the first downstream control signal to a number of sub-signals. At least one sub-signal is configured to control downstream transmission of a corresponding bi-directional optical transceiver to a corresponding ONU-group.
13 Citations
25 Claims
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1. An optical line terminal (OLT) in an Ethernet passive optical network (EPON), the OLT comprising:
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a plurality of optical transceivers, each optical transceiver from among the plurality of optical transceivers being configured to transmit a downstream signal from among a plurality of downstream signals to a corresponding optical network unit (ONU) group from among a plurality of ONU groups, each ONU group from among the plurality of ONU groups including a plurality of ONUs; a downstream media access control (MAC) interface configured to provide a downstream control signal; a splitter configured to split the downstream control signal into a plurality of sub-signals, each sub-signal from among the plurality of sub-signals controlling transmission of a corresponding downstream signal from among the plurality of downstream signals; and a plurality of upstream MAC interfaces configured to arbitrate a plurality of upstream signals received from the plurality of ONUs of each ONU group, wherein each upstream MAC interface from among the plurality of upstream MAC interfaces is further configured to independently control a corresponding optical transceiver from among the plurality of optical transceivers to arbitrate the plurality of upstream signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An optical line terminal (OLT) in an Ethernet passive optical network (EPON), the OLT comprising:
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a plurality of optical transceivers, each optical transceiver from among the plurality of optical transceivers being configured to transmit a downstream signal from among a plurality of downstream signals to a corresponding optical network unit (ONU) group from among a plurality of ONU groups, each ONU group from among the plurality of ONU groups including a plurality of ONUs; a downstream media access control (MAC) interface configured to provide a downstream control signal; a splitter configured to split the downstream control signal into a plurality of sub-signals, each sub-signal from among the plurality of sub-signals controlling transmission of a corresponding downstream signal from among the plurality of downstream signals; and a plurality of upstream MAC interfaces configured to arbitrate a plurality of upstream signals received from the plurality of ONUs of each ONU group, wherein the downstream MAC interface and an upstream MAC interface from among the plurality of upstream MAC interfaces are configured to operate at different data rates.
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15. In an optical line terminal (OLT), a method comprising:
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transmitting, using a plurality of optical transceivers, a plurality of downstream signals to corresponding optical network unit (ONU) groups from among a plurality of ONU groups, each ONU group from among the plurality of ONU groups including a plurality of ONUs; generating a downstream control signal; splitting the downstream control signal into a plurality of sub-signals, each sub-signal from among the plurality of sub-signals controlling transmission of a corresponding downstream signal from among the plurality of downstream signals; controlling the transmitting of the plurality of downstream signals utilizing the plurality of sub-signals; and arbitrating a plurality of upstream signals received from the plurality of ONUs of each ONU group, the arbitrating comprising; independently controlling a corresponding optical transceiver from among the plurality of optical transceivers to arbitrate the plurality of upstream signals. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification