Method, apparatus and system for transmitting upstream burst data in PON system

Patent metadata

Field	Value
Publication number	US-9686036-B2
Application number	US-91485710-A
Country	US
Kind code	B2
Filing date	Oct 28, 2010
Priority date	Apr 28, 2008
Publication date	Jun 20, 2017
Grant date	Jun 20, 2017

Abstract

A method, an apparatus and a system for transmitting upstream burst data in a passive optical network system. Delimitation of end of upstream burst data is realized in the method. The method includes: transmitting a sync pattern sequence and a burst delimiter after turning on a laser; transmitting data to be sent; and transmitting an end-of-burst delimiter after the transmitting of data to be sent is finished. A method for receiving upstream burst data and a related apparatus and system are also provided in the embodiments of the invention.

First claim

What is claimed is:

1. A method of transmitting upstream burst data to an Optical Line Terminal (OLT) in a passive optical network system, the method comprising:
detecting forward-error-correction (FEC) protected data in a first-in-first-out (FIFO) queue;
transmitting a sync pattern sequence and a burst delimiter after turning on a laser;
transmitting upstream burst data comprising the FEC protected data to be sent to the OLT; and
transmitting an end-of-burst delimiter after the transmitting of upstream burst data has been completed, wherein the end-of-burst delimiter enables the OLT to determine the end of the upstream burst data and the end-of-burst delimiter comprises a binary sequence with alternating zeroes and ones that is 66 bits in length.

2. The method according to claim 1 , wherein the end-of-burst delimiter is sent after it is detected that a First In First Out queue of a data detector is all filled with control blocks.

3. The method according to claim 1 , further comprising:
turning off the laser.

4. The method according to claim 3 , further comprising
setting a control block in a First In First Out queue of a data detector as an all-zero data block while starting turning off the laser or after starting turning off the laser.

5. The method according to claim 1 , further comprising:
reading the data to be sent after the transmitting of the sync pattern sequence and the burst delimiter.

6. The method according to claim 5 , further comprising:
determining whether the data transmitting is finished, and if the data transmitting is not finished, reading of the data to be sent continues.

7. The method according to claim 1 , further comprising:
detecting whether there is data to be sent, and if there is no data to be sent, the detecting continues; if it is detected that there is an Ethernet data frame to be sent, turning on the laser.

8. An Optical Network Unit (ONU), comprising:
a sync pattern sequence transmitting module configured to transmit a sync pattern sequence after a laser is turned on;
a burst delimiter transmitting module configured to transmit a burst delimiter after the laser is turned on;
an end-of-burst delimiter transmitting module configured to transmit an end-of-burst delimiter after the transmitting of upstream burst data has been completed, wherein the end-of-burst delimiter comprises a binary sequence with alternating zeroes and ones—that is 66 bits in length; and
a transmitting module configured to transmit the data to be sent to an Optical Line Terminal (OLT).

9. The apparatus according to claim 8 , further comprising:
a data detecting module configured to detect data to be sent, and instruct to turn on the laser when the data to be sent is detected.

10. The apparatus according to claim 8 , further comprising: a control identifier modifying module configured to set a control block in a First In First Out queue of a data detector as an all-zero data block after the transmitting of the data to be sent is finished and before the laser is turned off.

11. The apparatus according to claim 8 , further comprising: a data reading module configured to read the data to be sent from a transmitting buffer.

12. A passive optical network communication system, comprising an Optical Network Unit (ONU) and an Optical Line Terminal (OLT), wherein
the ONU comprises:
a sync pattern sequence transmitting module configured to transmit a sync pattern sequence after the laser is turned on;
a burst delimiter transmitting module configured to transmit a burst delimiter after the laser is turned on;
an end-of-burst delimiter transmitting module configured to inform the OLT of the end of the upstream burst data by transmitting an end-of-burst delimiter, wherein the end-of-burst delimiter comprises a binary sequence with alternating zeroes and ones that is 66 bits in length; and
a transmitting module configured to transmit the data to be sent to the OLT receiving end;
the OLT comprises:
a data receiving module configured to receive and shift data;
a burst delimiter matching module configured to perform matching of a burst delimiter on data of the data receiving module; and
an end-of-burst delimiter matching module configured to perform matching of an end-of-burst delimiter on the data of the data receiving module.

13. The system according to claim 12 , wherein the ONU further comprises:
a data detecting module configured to detect data to be sent, and instruct to turn on a laser when the data to be sent is detected.

14. The system according to claim 12 , wherein the ONU further comprises:
a data reading module configured to read the data to be sent from a transmitting buffer.

15. The system according to claim 12 , wherein the ONU further comprises: a control identifier modifying module configured to set a control block in a First In First Out queue of a data detector as an all-zero data block after the transmitting of the data to be sent is finished and before the laser is turned off.

16. The system according to claim 12 , wherein the OLT further comprises:
an additional sequence matching module configured to perform matching of an all-zero sequence with a particular length after the matching of the burst delimiter by the burst delimiter matching module succeeds.

Assignees

• Li Jing
• Geng Dongyu
• Feng Dongning
• Leung Raymond W K
• Effenberger Frank
• Huawei Tech Co Ltd

Inventors

• Li Jing
• Geng Dongyu
• Feng Dongning
• Leung Raymond W K
• Effenberger Frank

Classifications

• H04Q11/0067

  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 · CPC title

• H04J3/1694 Primary

  Allocation of channels in TDM/TDMA networks, e.g. distributed multiplexers (Passive Optical Networks H04Q11/0062) · CPC title

• H04L1/0041

  Arrangements at the transmitter end · CPC title

• H04Q2011/0064

  Arbitration, scheduling or medium access control aspects · CPC title

• H04J3/0605

  Special codes used as synchronising signal · CPC title