Passive optical network system and optical line terminating apparatus
First Claim
1. An optical line terminating apparatus (OLT), in a passive optical network (PON), connected to a plurality of types of optical network units (ONUs) having different signal transmission speeds through an optical distribution network, the optical line terminating apparatus comprising:
- an optical transmitter-receiver connected to the optical distribution network;
a transmission/reception line interface connected to a wide area network;
a downstream frame processing section for converting a packet received by the transmission/reception line interface from the wide area network into a downstream frame containing identification information on a destination ONU in a header; and
a downstream transmission controller for modulating the downstream frame at a speed corresponding to a signal transmission speed of the destination ONU and outputting the modulated frame to an electrical/optical converter connected to the optical transmitter-receiver.
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Accused Products
Abstract
A passive optical network (PON) system which enables plural types of ONUs having different signal transmission speeds to be connected to one OLT. An optical line terminating apparatus (OLT) connected to plural types of ONUs having different signal transmission speeds through an optical distribution network includes an optical transmitter-receiver connected to the optical distribution network, a transmission/reception line interface connected to a wide area network, a downstream frame processing section for converting a packet received by the transmission/reception line interface from the wide area network into a downstream frame containing identification information on a destination ONU in a header, and a downstream transmission controller for modulating the downstream frame at a speed corresponding to a signal transmission speed of the destination ONU and outputting the modulated frame to an electrical/optical converter connected to the optical transmitter-receiver.
19 Citations
11 Claims
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1. An optical line terminating apparatus (OLT), in a passive optical network (PON), connected to a plurality of types of optical network units (ONUs) having different signal transmission speeds through an optical distribution network, the optical line terminating apparatus comprising:
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an optical transmitter-receiver connected to the optical distribution network; a transmission/reception line interface connected to a wide area network; a downstream frame processing section for converting a packet received by the transmission/reception line interface from the wide area network into a downstream frame containing identification information on a destination ONU in a header; and a downstream transmission controller for modulating the downstream frame at a speed corresponding to a signal transmission speed of the destination ONU and outputting the modulated frame to an electrical/optical converter connected to the optical transmitter-receiver. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An optical line terminating apparatus (OLT), in a passive optical network (PON), connected to a plurality of types of optical network units (ONUs) having different signal transmission speeds through an optical distribution network, the optical line terminating apparatus comprising:
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an optical transmitter-receiver connected to the optical distribution network; a transmission/reception line interface connected to a wide area network; a downstream frame processing section for converting a packet received by the transmission/reception line interface from the wide area network into a downstream frame containing identification information on a destination ONU in a header; and a downstream transmission controller for converting a bit string of the downstream frame into a bit string corresponding to a standard signal transmission speed if a signal transmission speed of the destination ONU of the downstream frame is slower than the standard signal transmission speed, modulating the converted frame at the standard signal transmission speed, and outputting the modulated frame to an electrical/optical converter connected to the optical transmitter-receiver.
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11. A passive optical network (PON) system including an optical line terminating apparatus (OLT) connected to a wide area network and a plurality of types of optical network units (ONUs) having different signal transmission speeds and connected to the OLT through an optical distribution network, the OLT comprising:
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an OLT controller; an optical transmitter-receiver connected to the optical distribution network; a downstream frame processing section for converting a control packet generated by the OLT controller and a packet received from the wide area network into a downstream frame containing identification information on a destination ONU in a header; a downstream transmission controller for modulating the downstream frame at a speed corresponding to a signal transmission speed of the destination ONU and outputting the modulated frame to an electrical/optical converter connected to the optical transmitter-receiver; a demodulation section for demodulating an output signal of an optical/electrical converter connected to the optical distribution network at a speed corresponding to a signal transmission speed; and an upstream frame processing section connected to the demodulation section, wherein the OLT transmits and receives frames having different signal transmission speeds through the optical distribution network.
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Specification