# US 11,909,446 B2 · Data transmission method, related apparatus, and system

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- Number: US 11,909,446 B2
- Document ID: US11909446B2
- Status: Granted
- Kind: B2
- Application number: 17/962,840
- Filed: 2022-10-10
- Published: 2023-02-09
- Granted: 2024-02-20
- Earliest claimed: 2018-09-10
- Assignees: Huawei Technologies Co., Ltd.
- Applicants: Huawei Technologies Co., Ltd.
- Inventors: Xuming Wu; Shengping Li; Lei Zhou; Xiaofei Zeng
- Web page: https://patentgrep.com/patent/US11909446B2

## CPC

- H04B 10/27: Arrangements for networking
- H04Q 11/0067: {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}
- H04L 7/0075: {with photonic or optical means}
- H04L 25/03878: {Line equalisers; line build-out devices}
- H04Q 2011/0064: {Arbitration, scheduling or medium access control aspects}
- H04Q 2011/0088: {Signalling aspects}
- H04B: TRANSMISSION
- H04Q: SELECTING (switches, relays, selectors H01H; wireless communication networks H04W)
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)

## 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.

## Claims

### Claim 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.

### Claim 2 (depends on 1)

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.

### Claim 3 (depends on 2)

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.

### Claim 4 (depends on 2)

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

### Claim 5 (depends on 1)

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

### Claim 6 (depends on 1)

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.

### Claim 7 (depends on 6)

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

### Claim 8 (depends on 6)

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

### Claim 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.

### Claim 10 (depends on 9)

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.

### Claim 11 (depends on 10)

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

### Claim 12 (depends on 9)

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

### Claim 13 (depends on 9)

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.

### Claim 14 (depends on 13)

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

### Claim 15 (depends on 13)

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

### Claim 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.

### Claim 17 (depends on 16)

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.

### Claim 18 (depends on 17)

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.

### Claim 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.

### Claim 20 (depends on 19)

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.