Data Transmission Method, Related Apparatus, and System

Patent metadata

Field	Value
Publication number	US-2021194588-A1
Application number	US-202117195920-A
Country	US
Kind code	A1
Filing date	Mar 9, 2021
Priority date	Sep 10, 2018
Publication date	Jun 24, 2021
Grant date	—

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

What is claimed is:

1 . A data transmission 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, wherein the first synchronization data comprises a first frequency distribution, a first preamble, and an ONU identifier, wherein the payload comprises a second frequency distribution, and wherein a first bandwidth occupied by the first frequency distribution is narrower than a second bandwidth occupied by the second frequency distribution; and obtaining, from the first synchronization data, the ONU identifier.

2 . The method of claim 1 , wherein the synchronization data block further comprises second synchronization data comprising a third frequency distribution, and wherein a third bandwidth occupied by the third frequency distribution is wider than the first bandwidth.

3 . The method of claim 2 , wherein a first transmission rate of the second synchronization data is equal to a second transmission rate of the payload.

4 . The method of claim 2 , wherein the second synchronization data further comprises a second delimiter.

5 . The method of claim 2 , wherein the third bandwidth is an integer multiple of the first bandwidth.

6 . The method of claim 1 , wherein the first synchronization data further comprises a first delimiter.

7 . The method of claim 1 , wherein obtaining the ONU identifier further comprises:
recovering, based on the first preamble, a first clock; and identifying, from the first synchronization data using the first clock, the ONU identifier.

8 . The method of claim 1 , further comprising:
configuring, based on a prestored correspondence between the ONU identifier and an equalization parameter, the equalization parameter, wherein the equalization parameter corresponds to the ONU identifier; and performing, based on the equalization parameter, equalization on the payload.

9 . A data transmission 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, wherein the first synchronization data comprises a first frequency distribution, a first preamble, and an ONU identifier, wherein the payload comprises a second frequency distribution, and wherein a first bandwidth occupied by the first frequency distribution is narrower than a second bandwidth occupied by the second frequency distribution; and sending, to an optical line terminal (OLT), the uplink burst data.

10 . The method of claim 9 , wherein the synchronization data block further comprises second synchronization data comprising a third frequency distribution, and wherein a third bandwidth occupied by the third frequency distribution is wider than the first bandwidth.

11 . The method of claim 10 , wherein a first transmission rate of the second synchronization data is equal to a second transmission rate of the payload.

12 . The method of claim 10 , wherein the second synchronization data further comprises a second delimiter.

13 . The method of claim 10 , wherein the third bandwidth is an integer multiple of the first bandwidth.

14 . The method of claim 9 , wherein the first synchronization data further comprises a first delimiter.

15 . 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, wherein the first synchronization data comprises a first frequency distribution, a first preamble, and an ONU identifier, wherein the payload comprises a second frequency distribution, and wherein a first bandwidth occupied by the first frequency distribution is narrower than a second bandwidth occupied by the second frequency distribution; and a processor coupled to the receiver and configured to obtain, from the first synchronization data, the ONU identifier.

16 . The OLT of claim 15 , wherein the synchronization data block further comprises second synchronization data comprising a third frequency distribution, and wherein a third bandwidth occupied by the third frequency distribution is wider than the first bandwidth.

17 . The OLT of claim 16 , wherein a first transmission rate of the second synchronization data is equal to a second transmission rate of the payload.

18 . The OLT of claim 15 , wherein the processor is further configured to:
recover, based on the first preamble, a first clock; and identify, from the first synchronization data using the first clock, the ONU identifier.

19 . The OLT of claim 15 , wherein the processor is further configured to:
configure, based on a prestored correspondence between the ONU identifier and an equalization parameter, the equalization parameter, wherein the equalization parameter corresponds to the ONU identifier; and perform, based on the equalization parameter, equalization on the payload.

20 . The OLT of claim 15 , wherein the first synchronization data further comprises a first delimiter.

Assignees

• Huawei Tech Co Ltd

Inventors

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

Classifications

• H04Q2213/1336

  Synchronisation · CPC title

• H04Q2213/13214

  Clock signals · CPC title

• H04Q2011/0088

  Signalling aspects · CPC title

• H04Q2011/0064

  Arbitration, scheduling or medium access control aspects · 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