Data transmission method and apparatus

Patent metadata

Field	Value
Publication number	US-11777608-B2
Application number	US-202217881818-A
Country	US
Kind code	B2
Filing date	Aug 5, 2022
Priority date	May 25, 2018
Publication date	Oct 3, 2023
Grant date	Oct 3, 2023

Abstract

This application provides a data transmission method and apparatus. The method includes: processing, by a network device, a to-be-sent optical data unit ODU to obtain another ODU, where a bit rate of the another ODU is lower than a bit rate of the ODU; and sending, by the network device, the another ODU. In embodiments of this application, the ODU is processed to obtain the another ODU with a lower bit rate, and this helps reduce a rate increase when service data is transmitted in an OTN, so as to reduce an OTN interface rate and OTN costs.

First claim

What is claimed is:

1. A data transmission method, comprising:
obtaining a first optical data unit (ODU);
obtaining a second ODU based on performing 256b/257b encoding on the first ODU, wherein a bit rate of the second ODU is lower than a bit rate of the first ODU, and wherein the second ODU has a frame structure or an encoding mode different from the first ODU;
mapping the second ODU to a third ODU having a bit rate of n*100Gigabit per second (Gbps), where n is a positive integer; and
sending the third ODU.

2. The method according to claim 1 , wherein the processing the first ODU comprises:
deleting an unused timeslot in the first ODU.

3. The method according to claim 1 , wherein the performing the compression encoding on the first ODU comprises:
performing compression encoding on data in a payload area of the first ODU.

4. The method according to claim 1 , wherein the performing the compression encoding on the first ODU comprises:
performing compression encoding on an overhead in the first ODU.

5. A data transmission method, comprising:
obtaining a first service data;
obtaining a compressed service data based on processing the first service data by using 256b/257b encoding;
mapping the compressed service data to a flexible optical transport network (FlexO) frame; and
sending the FlexO frame.

6. The method according to claim 5 , wherein a bit rate of the first service data is 800 Gigabit per second (Gbps).

7. The method according to claim 5 , mapping the compressed service data to a FlexO frame comprises:
mapping the compressed service data to a flexible optical data unit (ODUflex) frame; and
mapping the ODUflex frame to the FlexO frame.

8. The method according to claim 5 , further comprising:
before obtaining the compressed service data, deleting one or more idle code blocks from the first service data.

9. A network device, comprising:
at least one processor and a transceiver coupled to the at least one processor, wherein the at least one processor is configured to:
obtain a first service data;
obtain a compressed service data based on processing the first service data by using 256b/257b encoding;
map the compressed service data to a flexible optical transport network (FlexO) frame; and
send the FlexO frame to a transceiver; and wherein the transceiver is configured to:
receive the FlexO frame and send the FlexO frame.

10. The network device according to claim 9 , wherein a bit rate of the first service data is 800 Gigabit per second (Gbps).

11. The network device according to claim 9 , wherein the map the compressed service data to the FlexO frame comprises:
map the compressed service data to a flexible optical data unit (ODUflex) frame; and
map the ODUflex frame to the FlexO frame.

12. The network device according to claim 9 , the programming instructions are for execution by the at least one processor to:
before obtaining the compressed service data, delete one or more idle code blocks from the first service data.

Assignees

• Huawei Tech Co Ltd

Inventors

• Su Wei
• Wu Qiuyou
• Qing Huaping

Classifications

• H04B10/27 Primary

  Arrangements for networking · CPC title

• H04B10/6932

  Bandwidth control of bit rate adaptation · CPC title

• H04J3/1658

  carrying packets or ATM cells; (H04J3/1664 takes precedence for payloads with different packet types) · CPC title

• H04L1/0002

  by adapting the transmission rate · CPC title

• H04L1/0025

  Transmission of mode-switching indication · CPC title