Converged PON for TDMA-PON service based on OFDMA-PON
First Claim
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1. An optical line terminal (OLT) of a converged passive optical network (CPON) that is a combination of a time division multiple access-passive optical network (TDMA-PON) and an orthogonal frequency division multiple access-passive optical network (OFDMA-PON), the OLT comprising:
- an OLT interface unit to be matched with an OLT of the TDMA-PON corresponding to each of a plurality of services of the TDMA-PON;
a subcarrier queue transmission unit to process a subcarrier queue corresponding to each of the plurality of services;
an OFDM frame processing unit to process an OFDM frame corresponding to each of the plurality of services; and
an OFDM modem to transmit and receive the OFDM frame,wherein the OFDM frame processing unit comprises;
a first frame conversion unit to convert an OFDM downstream frame transmitted through a subcarrier into a data frame associated with a service of the TDMA-PON; and
a second frame conversion unit to convert a data frame associated with a service of the TDMA-PON into an OFDM frame for upstream transmission.
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Abstract
A converged passive optical network (CPON) and a data transmission method are disclosed. The CPON is a combination of a time division multiple access-passive optical network (TDMA-PON) and an orthogonal frequency division multiple access-passive optical network (OFDMA-PON) and is able to dynamically controlling a bandwidth for upstream signal transmission through allocation of multiple subcarriers to each single optical network unit (ONU).
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Citations
14 Claims
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1. An optical line terminal (OLT) of a converged passive optical network (CPON) that is a combination of a time division multiple access-passive optical network (TDMA-PON) and an orthogonal frequency division multiple access-passive optical network (OFDMA-PON), the OLT comprising:
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an OLT interface unit to be matched with an OLT of the TDMA-PON corresponding to each of a plurality of services of the TDMA-PON; a subcarrier queue transmission unit to process a subcarrier queue corresponding to each of the plurality of services; an OFDM frame processing unit to process an OFDM frame corresponding to each of the plurality of services; and an OFDM modem to transmit and receive the OFDM frame, wherein the OFDM frame processing unit comprises; a first frame conversion unit to convert an OFDM downstream frame transmitted through a subcarrier into a data frame associated with a service of the TDMA-PON; and a second frame conversion unit to convert a data frame associated with a service of the TDMA-PON into an OFDM frame for upstream transmission. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An optical network terminal (ONT) of a converged passive optical network (CPON) that is a combination of a time division multiple access-passive optical network (TDMA-PON) and an orthogonal frequency division multiple access-passive optical network (OFDMA-PON), the ONT comprising:
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an OFDM modem to transmit and receive an OFDM frame to and from an optical line terminal (OLT) through an optical link; an OFDM frame processing unit to process an OFDM frame corresponding to each of a plurality of services; a subcarrier queue transmission unit to process a subcarrier queue corresponding to each of the plurality of services; and an ONT interface unit to be matched with an ONT of the TDMA-PON corresponding to each of the plurality of services, wherein the OFDM frame processing unit comprises a first frame conversion unit to convert an OFDM downstream frame transmitted through a subcarrier into a data frame associated with a service of the TDMA-PON, and a second frame conversion unit to convert a data frame associated with a service of the TDMA-PON into an OFDM frame for upstream transmission. - View Dependent Claims (10, 11, 12, 13, 14)
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Specification