Optical transceiver and data mapping method using thereof

• US 10,044,468 B2
• Filed: 06/02/2016
• Issued: 08/07/2018
• Est. Priority Date: 12/02/2013
• Status: Active Grant

• Current Assignee: OE Solutions America, Inc (Oe Solutions Co., Ltd.)
• Original Assignee: OE Solutions America, Inc (Oe Solutions Co., Ltd.)
• Inventors: Seo, Wanseok, Kim, Jong Ho, Park, Moon Soo, Yu, Joon Sang
• Primary Examiner(s): McMahon, Daniel
• Application Number:
  US15/171,980
• Publication Number:
  US 20160285590A1
• Time in Patent Office: 796 Days
• Field of Search: None
• CPC Class Codes: H04B 10/40 Transceivers
• CPC Class Codes: H04L 1/0041 Arrangements at the transmitter end
• CPC Class Codes: H04L 1/0045 Arrangements at the receiver end

Abstract

Disclosed is an optical transceiver. The optical transceiver includes a decoder for decoding an 8B10B line-coded signal, a data mapper for separating the decoded signal into block units and securing extra memory capacity by mapping a data code and a block information code onto each of the separated blocks, and an FEC encoding unit for creating Forward Error Correction (FEC) data and mapping the FEC data onto the extra memory capacity.

Claims

1. An optical transceiver comprising:

a decoder configured to decode an 8B10B line-coded signal;

a data mapper configured to divide a decoded signal from the decoder into block units by combining eight 8-bit signals and securing fifteen bits of extra memory capacity as a result of mapping sixty four bits of data code and one bit of block information code into each of the divided block units; and

a Forward Error Correction (FEC) encoding unit for creating an FEC data and mapping the FEC data into the extra memory capacity,

wherein the decoder is further configured to decode the 8B10B line-coded signal based on a determination as to whether an input signal is a code word or a control word.

2. The optical transceiver according to claim 1, wherein a number of bits of the extra memory capacity is determined as a value calculated by subtracting a number of bits of the data code and the block information code from a total number of bits of the 8B10B line-coded signal before decoding.

3. The optical transceiver according to claim 1, further comprising a framer for forming a frame by mapping a plurality of blocks, into which the FEC data is mapped, to a Generic Framing Protocol (GFP) frame.

4. The optical transceiver according to claim 2, wherein the framer creates an overhead signal and maps the overhead signal into the extra memory capacity.

5. The optical transceiver according to claim 1, wherein the data mapper is configured to divide the decoded signal into block units by combining eight 8-bit signals and secures ten bits of extra memory capacity by mapping sixty four bits of data code and six bits of block information code into each of the separated blocks.

6. The optical transceiver according to claim 1, further comprising a demultiplexer for splitting the 8B10B line-coded signal into a plurality of parallel signals and transferring the split signals to the decoder.

7. The optical transceiver according to claim 3, further comprising a multiplexer for multiplexing the frames into a serial signal.

9. The data mapping method according to claim 7, wherein a number of bits of the extra memory capacity is determined as a value calculated by subtracting a number of bits of the data code and the block information code from a total number of bits of the 8B10B line-coded signal before decoding.

11. The data mapping method according to claim 9, wherein the framing step includes a step of creating an overhead signal and mapping the overhead signal into the extra memory capacity.

16. The optical transceiver of claim 1, wherein the data mapper is further configured to insert a block information code in each block unit, the block information code comprising information on at least one of:

a number of data bytes or control bytes.

17. The optical transceiver of claim 1, wherein the data mapper is further configured to decode the 8B10B line-coded signal into an original 8-bit value when the input signal is determined to be a code word.

18. The optical transceiver of claim 1, wherein the data mapper is further configured to decode the 8B10B line-coded signal into a plurality of bits comprising a 4-bit Control Code Indicator (CCI), 3-bit position information and an extra one bit when the input signal is determined to be a control word;

and

wherein the extra one bit indicates whether a subsequent symbol is a control code, the 3-bit position information indicates an original position of the conde code among a sequence of eight symbols contained in the block.

8. A data mapping method in an optical communication system, the method comprising:

a decoding step of decoding an 8B10B line-coded signal;

a data mapping step of dividing the decoded signal from the decoder into block units by combining eight 8-bit signals and securing fifteen bits of extra memory capacity as a result of mapping sixty four bits of data code and one bit of block information code into each of the divided block units; and

a Forward Error Correction (FEC) encoding step of creating an FEC data and mapping the FEC data into the extra memory capacity, wherein the decoder is further configured to decode the 8B10B line-coded signal based on a determination as to whether an input signal is a code word or a control word.

10. The data mapping method according to claim 8, further comprising a framing step of forming a frame by mapping a plurality of blocks, onto which the FEC data is mapped, to a Generic Framing Procedure (GFP) frame.

12. The data mapping method according to claim 8, further comprising, before the decoding step, the step of splitting the 8B10B line-coded signal into a plurality of parallel signals.

13. The data mapping method according to claim 10, further comprising the step of multiplexing the frames into a serial signal.

14. The data mapping method according to claim 8, wherein the data mapping step further comprises dividing the decoded signal into block units by combining eight 8-bit signals and secures ten bits of extra memory capacity by mapping sixty four bits of data code and six bits of block information code onto each of the separated blocks.

15. The data mapping method according to claim 8, wherein the data mapping step further comprises inserting a block information code in each block unit, the block information code comprising information on at least one of:

a number of data bytes or control bytes.