Method of configuring automatically wavelength of optical network unit

Patent metadata

Field	Value
Publication number	US-2015365190-A1
Application number	US-201414764362-A
Country	US
Kind code	A1
Filing date	Jan 14, 2014
Priority date	Feb 6, 2013
Publication date	Dec 17, 2015
Grant date	—

Abstract

In one embodiment, an optical line terminal judges whether the optical network unit operates at a correct uplink wavelength and a correct downlink wavelength during an optical network unit activation progress; and broadcasts a wavelength configuration message if the optical network unit does not operate at the correct uplink wavelength and the correct downlink wavelength to instruct the optical network unit to tune its uplink wavelength and downlink wavelength respectively to the correct uplink wavelength and the correct downlink wavelength.

First claim

1 . A method, in an optical line terminal, of configuring automatically a wavelength of an optical network unit during an optical network unit activation progress, the method comprising:
B. judging whether the optical network unit operates at a correct uplink wavelength and a correct downlink wavelength; and C. broadcasting a wavelength configuration message, if the optical network unit does not operate at the correct uplink wavelength and the correct downlink wavelength, the wavelength configuration message including a correct uplink wavelength indication message, a correct downlink wavelength indication message, a Vendor-ID of the optical network unit and a Vendor-specific serial number of the optical network unit.

2 . The method according to claim 1 , wherein the steps B and C are performed before the optical line terminal allocates an identifier of the optical network unit for the optical network unit.

3 . The method according to claim 1 , wherein before the step B, the method further comprises:
A. receiving serial number information from the optical network unit, the serial number information including the Vendor-ID of the optical network unit and the Vendor-specific serial number of the optical network unit; and the step B further comprises: judging whether the optical network unit operates at the correct uplink wavelength and the correct downlink wavelength according to the serial number information.

4 . The method according to claim 3 , wherein the step B further comprises:
judging whether the optical network unit operates at the correct uplink wavelength and the correct downlink wavelength by referring to a database in the optical line terminal, wherein the database stores a correspondence relationship between a serial number of the optical network unit and the correct uplink wavelength and correct downlink wavelength; or judging whether the optical network unit operates at the correct uplink wavelength and the correct downlink wavelength by communicating the serial number information of the optical network unit with another network element to obtain the correct uplink wavelength and the correct downlink wavelength at which the optical network unit shall operate.

5 . The method according to claim 4 , wherein the correct uplink wavelength indication message includes a correct uplink wavelength value or a correct uplink wavelength channel number or wavelength adjustment information associated with the correct uplink wavelength and/or the correct downlink wavelength indication message includes a correct downlink wavelength value or a correct downlink wavelength channel number or wavelength adjustment information associated with the correct downlink wavelength.

6 . A method, in an optical network unit, of assisting an optical line terminal in configuring automatically a wavelength of the optical network unit during an optical network unit activation progress, the method comprising:
b. receiving a wavelength configuration message broadcasted by the optical line terminal, the wavelength configuration message including a correct uplink wavelength indication message, a correct downlink wavelength indication message, a Vendor-ID of the optical network unit and a Vendor-specific serial number of the optical network unit; c. judging whether the Vendor-ID of the optical network unit and the Vendor-specific serial number of the optical network unit in the wavelength configuration message are consistent respectively with a Vendor-ID of the optical network unit itself and a Vendor-specific serial number of the optical network unit itself; and d. tuning a current uplink wavelength and a current downlink wavelength respectively to a correct uplink wavelength and a correct downlink wavelength according to the correct uplink wavelength indication message and the correct downlink wavelength indication message, if they are consistent.

7 . The method according to claim 6 , wherein before the step b, the method further comprises the step a:
a. sending serial number information to the optical line terminal, the serial number information including the Vendor-ID of the optical network unit itself and the Vendor-specific serial number of the optical network unit itself.

8 . The method according to claim 6 , wherein the correct uplink wavelength indication message includes a correct uplink wavelength value or a correct uplink wavelength channel number or wavelength adjustment information associated with the correct uplink wavelength and/or the correct downlink wavelength indication message includes a correct downlink wavelength value or a correct downlink wavelength channel number or wavelength adjustment information associated with the correct downlink wavelength.

9 . The method according to claim 8 , wherein when the optical network unit can buffer the correct uplink wavelength and the correct downlink wavelength, the step d further comprises:
replacing the current uplink wavelength and the current downlink wavelength respectively with the correct uplink wavelength and the correct downlink wavelength.

10 . A method, in an optical line terminal, of configuring automatically a wavelength of an optical network unit during an optical network unit operation progress, wherein at least one optical network unit communicates with the optical line terminal at a first downlink wavelength as a current downlink wavelength, and the method comprises:
broadcasting a wavelength configuration message to the at least one optical network unit at the first downlink wavelength, the wavelength configuration message including a correct uplink wavelength indication message and a correct downlink wavelength indication message.

11 . The method according to claim 10 , wherein the correct uplink wavelength indication message includes a correct uplink wavelength value or a correct uplink wavelength channel number or wavelength adjustment information associated with a correct uplink wavelength and/or the correct downlink wavelength indication message includes a correct downlink wavelength value or a correct downlink wavelength channel number or wavelength adjustment information associated with a correct downlink wavelength.

12 . A method, in an optical network unit, of assisting an optical line terminal in configuring automatically a wavelength of the optical network unit during an optical network unit operation progress, wherein the optical network unit communicates with the optical line terminal at a first downlink wavelength as a current downlink wavelength, and the method comprises:
X1. receiving a wavelength configuration message broadcasted by the optical line terminal at the first downlink wavelength, the wavelength configuration message including a correct uplink wavelength indication message and a correct downlink wavelength indication message; and X2. tuning a current uplink wavelength and a current downlink wavelength respectively to a correct uplink wavelength and a correct downlink wavelength according to the correct uplink wavelength indication message and the correct downlink wavelength indication message.

13 . The method according to claim 12 , wherein when the optical network unit can buffer the correct uplink wavelength and the correct downlink wavelength, the step X2 further comprises:
replacing the current uplink wavelength and the current downlink wavelength respectively with the correct uplink wavelength and the correct downlink wavelength.

14 . A method, in an optical line terminal, of configuring automatically a wavelength of an optical network unit during an optical network unit operation progress, the method comprising:
sending a wavelength

Assignees

• Alcatel Lucent

Inventors

• Wen Haibo
• Yang Shuigen
• Bin Fanxiang

Classifications

• H04J14/0282

  WDM tree architectures · CPC title

• H04J14/0257

  Wavelength assignment algorithms · CPC title

• H04J14/0267

  Optical signaling or routing · CPC title

• H04J14/0223

  Conversion to or from optical TDM · CPC title

• H04J14/025

  using one wavelength per ONU, e.g. for transmissions from-ONU-to-OLT or from-ONU-to-ONU · CPC title