Transmission device and reception device

Patent metadata

Field	Value
Publication number	US-12425280-B2
Application number	US-202318459917-A
Country	US
Kind code	B2
Filing date	Sep 1, 2023
Priority date	Sep 20, 2022
Publication date	Sep 23, 2025
Grant date	Sep 23, 2025

Abstract

A transmission device includes an encoding circuit and a modulation circuit. The encoding circuit is configured to encode first and second data stream portions of a transmission data stream in accordance with first and second encoding protocols, respectively, convert each M bit of the encoded second data stream portion into a high-resolution value of N bit, and generate a baseband data stream including the encoded first data stream portion and the converted second data stream portion. The modulation circuit is configured to perform a 2 N -level pulse amplitude modulation with respect to each N bit of the encoded first data stream portion in the baseband data stream and each N bit of the converted second data stream portion in the baseband data stream, to generate a transmission signal. M is an integer equal to or greater than 1 and N is an integer greater than M.

First claim

What is claimed is:

1. A transmission device comprising:
an encoding circuit configured to:
encode a first data stream portion of a transmission data stream in accordance with a first encoding protocol and a second data stream portion of the transmission data stream in accordance with a second encoding protocol;
convert each M bit of the encoded second data stream portion into a high-resolution value of N bit, M being an integer equal to or greater than 1 and N being an integer greater than M; and
generate a baseband data stream including the encoded first data stream portion and the converted second data stream portion; and

a modulation circuit configured to perform a 2 N -level pulse amplitude modulation with respect to each N bit of the encoded first data stream portion in the baseband data stream and each N bit of the converted second data stream portion in the baseband data stream, to generate a transmission signal.

2. The transmission device according to claim 1 , wherein
M is 1 and N is 2, and
the high-resolution value of N bit is a value corresponding to the maximum or minimum level of the 2 N -level pulse amplitude.

3. The transmission device according to claim 2 , wherein
the second line encoding method is an 8b/10b encoding method, and
the second data stream portion includes control codes for controlling transmission and reception.

4. The transmission device according to claim 2 , wherein the baseband data stream includes one or a plurality of blocks having a fixed data length determined by the first line encoding method,
each of the blocks includes a sync header that is a synchronization code and a data area that follows the sync header,
the sync header is used to represent whether the corresponding data area is from the encoded first data stream portion or the converted second data stream portion.

5. The transmission device according to claim 4 , wherein
the second line encoding method is an 8b/10b encoding method,
the second data stream portion includes one or a plurality of control packets including one or a plurality of control codes for controlling transmission and reception.

6. The transmission device according to claim 4 , wherein
the second line encoding method is an 8b/10b encoding method,
the second data stream portion includes header and footer of data packets,
the first data stream portion includes payload data of data packets,
the encoding circuit is configured to encode and convert the header of data packets into one or a plurality of header blocks,
the encoding circuit is configured to encode the payload data of data packets into one or a plurality of payload blocks, and
the encoding circuit is configured to encode and convert the footer of data packets into one or a plurality of footer blocks.

7. The transmission device according to claim 6 , wherein
the encoding circuit is configured to fill in the surplus area in the header blocks with data generated by encoding and converting the first potion of the following payload data in the same way as the second data stream portion.

8. The transmission device according to claim 6 , wherein the encoding circuit is configured to calculate a cumulative value obtained by cumulatively adding 2 N -level amplitude levels of data streams modulated by the modulation circuit, and
the encoding circuit is configured to fill in the surplus area with a compensation data stream that is to be modulated into the value with opposite sign of the cumulative value.

9. The transmission device according to claim 6 , wherein the encoding circuit is configured to calculate a cumulative value obtained by cumulatively adding 2 N -level amplitude levels of data streams modulated by the modulation circuit, and
the encoding circuit is configured to treat all of the transmission data stream as the second data stream portion after the absolute value of the cumulative value exceeds a predetermined first threshold until the absolute value of the cumulative value falls below a predetermined second threshold that is equal to or less than the first threshold.

10. The transmission device according to claim 4 , wherein
the encoding unit is configured to divide the second data stream converted into a series of the high-resolution values into two continuous blocks.

11. A reception device comprising:
a sampling circuit configured to sample a transmission signal generated with 2 N -level pulse amplitude modulation, N being an integer equal to or greater than two, during each predetermined period, to generate a baseband data stream, which includes a first data stream portion and a second data stream portion; and
a decoding circuit configured to:
decode the first data stream portion in accordance with a first decoding protocol;
convert each N bit of the second data stream portion into a low-resolution value of M bit, M being an integer equal to or greater than 1 and less than N;
decode the converted second data stream portion in accordance with a second decoding protocol; and
generate a transmission data stream including the decoded first data stream portion and the converted second data stream portion.

12. The reception device according to claim 11 , wherein M is 1 and N is 2.

13. The reception device according to claim 12 , wherein
the second line decoding method is an 8b/10b decoding method, and
the second data stream portion includes control codes for controlling transmission and reception.

14. The reception device according to claim 12 , wherein the baseband data stream includes one or a plurality of blocks having a fixed data length determined by the first line encoding method,
each of the blocks includes a sync header that is a synchronization code and a data area that follows the sync header,
the sync header is used to detect whether the corresponding data area is the first data stream portion or the second data stream portion.

15. The reception device according to claim 14 , wherein
the second line decoding method is an 8b/10b decoding method,
the second data stream portion includes control packets including a control code for controlling transmission and reception.

16. The reception device according to claim 14 , wherein
the second line decoding method is an 8b/10b decoding method,
the second data stream portion includes header and footer of data packets,
the first data stream portion includes payload data of data packets,
the decoding circuit is configured to convert and decode the header block of data packets into header of the packet,
the decoding circuit is configured to decode the payload block of data packets into payload data of the packet, and
the decoding circuit is configured to convert and decode the footer block of data packets into footer of the packet.

17. The reception device according to claim 16 , wherein
the decoding circuit is configured to acquire not only header but also partial payload data from one or a plurality of partial payload units having a predetermined size which follow the header in the header blocks in the second data stream portion.

18. The reception device according to claim 16 , wherein the decoding circuit is configured to calculate a cumulative value obtained by cumulatively adding 2 N -level amplitude levels of data streams, and
the decoding circuit is configured to treat all of the baseband data stream as the second data stream portion after the absolute value of the cumulative value exceeds a predetermined first threshold until the absolute value of the cumulative value falls below a predetermined second thre

Assignees

• Kioxia Corp

Inventors

• Jimbo Ushio
• Watanabe Manabu
• Sonoda Daisuke

Classifications

• H03M5/145 Primary

  Conversion to or from block codes or representations thereof · CPC title

• H04L25/4902

  Pulse width modulation; Pulse position modulation · CPC title

• H04L25/4917

  using multilevel codes · CPC title

• H04L25/4908 Primary

  using mBnB codes · CPC title