Optical network unit reset message

• US 10,700,776 B2
• Filed: 12/18/2018
• Issued: 06/30/2020
• Est. Priority Date: 06/21/2016
• Status: Active Grant

• Current Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Inventors: Gao, Bo, Luo, Yuanqiu
• Primary Examiner(s): Singh, Dalzid E
• Application Number:
  US16/223,512
• Publication Number:
  US 20190123815A1
• Time in Patent Office: 560 Days
• Field of Search: 398 1
• CPC Class Codes: H04B 10/03 Arrangements for fault recovery
• CPC Class Codes: H04B 10/27 Arrangements for networking

Abstract

The present disclosure relates to methods and devices for processing a physical layer operations, administration, and maintenance (PLOAM) reset message. One example method includes receiving the PLOAM reset message comprising a reset level, the reset level comprising an indication of a component of an optical network unit (ONU) to be reset, and resetting the ONU according to the reset level.

Claims

1. An optical network unit (ONU) comprising:

a passive optical network (PON) interface configured to communicate using physical layer operations, administration, and maintenance (PLOAM) messages; and

a processor coupled to the PON interface, with the processor configured to;

receive a PLOAM reset message comprising a reset level with the reset level comprising an instruction for the ONU to reset a management information base (MIB); and

after receiving the PLOAM reset message;

reset the ONU according to the reset level; and

reset the MIB.

2. The ONU of claim 1, wherein the ONU further comprises a memory configured to store the MIB, low-level software, and high-level software, wherein the reset level comprises an instruction for the ONU to reset the processor, the memory, and the PON interface, and the processor further configured to reset the processor, the memory, and the PON interface and restart the low-level software and high-level software.

3. The ONU of claim 1, wherein the reset level indicates a depth of the reset of the ONU.

4. The ONU of claim 1, wherein the reset level comprises an instruction for the ONU to reset an ONT management and control interface (OMCI).

5. The ONU of claim 1, wherein the PLOAM reset message further comprises an instruction for the ONU to preserve the MIB before resetting the ONU, and the processor further configured to:

preserve the MIB before resetting the ONU; and

restore the MIB after resetting the ONU.

6. The ONU of claim 1, wherein the ONU comprises a current operating state, wherein the PLOAM reset message further comprises a conditional reset instruction or an unconditional reset instruction, wherein the conditional reset instruction comprises an indicator of an ONU operating state, and the processor further configured to:

reset the ONU when the PLOAM reset message comprises the conditional reset instruction and when the current operating state corresponds to the indicator of the ONU operating state;

or

reset the ONU when the PLOAM reset message comprises the unconditional reset instruction.

7. A method for an optical network unit (ONU) to receive and process a physical layer operations, administration, and maintenance (PLOAM) reset message, the method comprising:

receiving the PLOAM reset message comprising a reset level and with the reset level comprising an instruction for the ONU to reset a management information base (MIB); and

after receiving the PLOAM reset message;

resetting the ONU according to the reset level; and

resetting the MIB.

8. The method of claim 7, wherein the reset level indicates a depth of the reset of the ONU.

9. The method of claim 7, wherein the ONU comprises high-level software, wherein the reset level comprises an instruction for the ONU to reset the high-level software, and the method further comprising resetting the high-level software.

10. An optical line terminal (OLT) comprising:

a passive optical network (PON) interface configured to communicate with an optical network unit (ONU) using physical layer operations, administration, and maintenance (PLOAM) messages;

a memory configured to store identity and state information about the ONU; and

a processor coupled to the PON interface, with the processor configured to;

detect that the ONU is not responding to optical network terminal management and control interface (OMCI) messages;

create a first PLOAM reset message comprising a first reset level, with the first reset level comprising an instruction for the ONU to reset a management information base (MIB);

send the first PLOAM reset message to the ONU via the PON interface;

detect that the ONU is still not responding to OMCI messages;

create a second PLOAM reset message comprising a second reset level that is different from the first reset level; and

send the second PLOAM reset message to the ONU via the PON interface.

11. The OLT of claim 10, wherein the first reset level indicates a depth of the reset of the ONU.

12. The OLT of claim 10, wherein the first reset level comprises an instruction for the ONU to reset a OMCI.

13. A method for an optical line terminal (OLT) to reset a remote optical network unit (ONU), the method comprising:

detect that the ONU is not responding to optical network terminal management and control interface (OMCI) messages;

create a first physical layer operations, administration, and maintenance (PLOAM) reset message comprising a first reset level, with the first reset level comprising an instruction for the ONU to reset a management information base (MIB);

send the first PLOAM reset message to the ONU via a PLOAM channel;

detect that the ONU is still not responding to OMCI messages;

create a second PLOAM reset message comprising a second reset level that is different from the first reset level; and

send the second PLOAM reset message to the ONU via the PLOAM channel.

14. The method of claim 13, wherein the first reset level indicates a depth of the reset of the ONU, wherein the first reset level comprises an instruction for the ONU to reset an optical network terminal management and control interface (OMCI).

15. The method of claim 13, wherein the first reset level indicates a depth of the reset of the ONU.