Data transmission method, related apparatus, and system

Patent metadata

Field	Value
Publication number	US-11909446-B2
Application number	US-202217962840-A
Country	US
Kind code	B2
Filing date	Oct 10, 2022
Priority date	Sep 10, 2018
Publication date	Feb 20, 2024
Grant date	Feb 20, 2024

Abstract

A data transmission method includes receiving, by an optical line terminal (OLT) from an optical network unit (ONU), uplink burst data that includes a synchronization data block and a payload, where the synchronization data block includes first synchronization data, wherein the first synchronization data includes a first preamble and an ONU identifier, and a first bandwidth occupied by the first frequency distribution of the first synchronization data is narrower than a second bandwidth occupied by the second frequency distribution of the payload, and obtaining, by the OLT from the first synchronization data, the ONU identifier.

First claim

The invention claimed is:

1. A method implemented by an optical line terminal (OLT), wherein the method comprises:
receiving, from an optical network unit (ONU), uplink burst data comprising a synchronization data block and a payload, wherein the synchronization data block comprises first synchronization data and second synchronization data, wherein the first synchronization data comprises a first preamble and a first delimiter, and wherein the second synchronization data comprises a second preamble and a second delimiter;
recovering a clock based on the synchronization data block;
obtaining an equalization parameter based on the synchronization data block; and
recovering the payload using the clock and the equalization parameter.

2. The method of claim 1 , wherein the first preamble is of a first code type, and wherein the second preamble is of a second code type.

3. The method of claim 2 , wherein before receiving the uplink burst data, the method further comprises:
determining the first code type and the second code type; and
sending the first code type and the second code type to the ONU.

4. The method of claim 2 , wherein the first code type and the second code type are different.

5. The method of claim 1 , wherein the second synchronization data and the payload have different transmission rates.

6. The method of claim 1 , wherein the first synchronization data further comprises a first frequency distribution occupying a first bandwidth, wherein the payload comprises a second frequency distribution occupying a second bandwidth, and wherein the second synchronization data further comprises a third frequency distribution occupying a third bandwidth.

7. The method of claim 6 , wherein the third bandwidth is wider than the first bandwidth.

8. The method of claim 6 , wherein the third bandwidth is an integer multiple of the first bandwidth.

9. A method implemented by an optical network unit (ONU), wherein the method comprises:
generating uplink burst data comprising a synchronization data block and a payload, wherein the synchronization data block comprises first synchronization data and second synchronization data, wherein the first synchronization data comprises a first preamble and a first delimiter, and wherein the second synchronization data comprises a second preamble and a second delimiter; and
sending, to an optical line terminal (OLT), the uplink burst data.

10. The method of claim 9 , wherein the first preamble is of a first code type, and wherein the second preamble is of a second code type.

11. The method of claim 10 , wherein the first code type and the second code type are different.

12. The method of claim 9 , wherein the second synchronization data and the payload have different transmission rates.

13. The method of claim 9 , wherein the first synchronization data further comprises a first frequency distribution occupying a first bandwidth, wherein the payload comprises a second frequency distribution occupying a second bandwidth, and wherein the second synchronization data further comprises a third frequency distribution occupying a third bandwidth.

14. The method of claim 13 , wherein the third bandwidth is wider than the first bandwidth.

15. The method of claim 13 , wherein the third bandwidth is an integer multiple of the first bandwidth.

16. An optical line terminal (OLT) comprising:
a receiver configured to receive, from an optical network unit (ONU), uplink burst data comprising a synchronization data block and a payload, wherein the synchronization data block comprises first synchronization data and second synchronization data, wherein the first synchronization data comprises a first preamble and a first delimiter, and wherein the second synchronization data comprises a second preamble and a second delimiter; and
a processor coupled to the receiver and configured to:
recover a clock based on the synchronization data block;
obtain an equalization parameter based on the synchronization data block; and
recover the payload using the clock and the equalization parameter.

17. The OLT of claim 16 , wherein the first preamble is of a first code type, and wherein the second preamble is of a second code type.

18. The OLT of claim 17 , wherein before receiving the uplink burst data, the processor is further configured to:
determine the first code type and the second code type; and
send, using a transmitter, the first code type and the second code type to the ONU.

19. An optical network unit (ONU) comprising:
a processor configured to generate uplink burst data comprising a synchronization data block and a payload, wherein the synchronization data block comprises first synchronization data and second synchronization data, wherein the first synchronization data comprises a first preamble and a first delimiter, and wherein the second synchronization data comprises a second preamble and a second delimiter; and
a transmitter coupled to the processor and configured to send, to an optical line terminal (OLT), the uplink burst data.

20. The ONU of claim 19 , wherein the first preamble is of a first code type, and wherein the second preamble is of a second code type.

Assignees

• Huawei Tech Co Ltd

Inventors

• Wu Xuming
• Li Shengping
• Zhou Lei
• Zeng Xiaofei

Classifications

• H04B10/27 Primary

  Arrangements for networking · CPC title

• H04L7/0075

  with photonic or optical means · CPC title

• H04L25/03878

  Line equalisers; line build-out devices · CPC title

• H04Q11/0067 Primary

  Provisions for optical access or distribution networks, e.g. Gigabit Ethernet Passive Optical Network (GE-PON), ATM-based Passive Optical Network (A-PON), PON-Ring · CPC title

• H04Q11/0066 Primary

  Provisions for optical burst or packet networks · CPC title