Converged pon for tdma-pon service based on ofdma-pon
AssigneeElectronics and Telecommunications Research Institute
InventorsKwang Ok KIM, Seung-Hyun CHO, Jie Hyun LEE, Seung Il MYONG, Sang Soo LEE, Jong Hyun LEE
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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).
Claims17
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.
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:
- 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.
A method of transmitting data performed by 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 method comprising:
- converting a data signal corresponding to each of a plurality of services of the TDMA-PON into a media access control (MAC) frame or a GPON transmission convergence (GTC) frame based on a transmission protocol;
- converting the MAC frame or the GTC frame into an OFDM frame by adding overhead information to the MAC frame or the GTC frame;
- and
- transmitting the OFDM frame to an optical network terminal (ONT) of the OFDMA-PON.
Dependencies are inferred from the claim text.