Link determining method, apparatus, and system for optical packet switching system

Patent metadata

Field	Value
Publication number	US-2017034605-A1
Application number	US-201615293690-A
Country	US
Kind code	A1
Filing date	Oct 14, 2016
Priority date	Apr 15, 2014
Publication date	Feb 2, 2017
Grant date	—

Abstract

Embodiments of the present invention relate to the field of information technologies and disclose a link determining method, apparatus, and system for an optical packet switching system, which can reduce optical packet switching costs. The method includes: first, a control manager generates reference optical label information and an enabling signal, and sends the reference optical label information and the enabling signal to a link determining device; then, when the enabling signal is active, the link determining device determines, according to parsed-out actual optical label information and the received reference optical label information, whether an alarm signal is generated, and if it is determined that the alarm signal is generated, sends the alarm signal to the control manager; and finally, the control manager further determines, according to the received alarm signal, whether a link corresponding to the alarm signal is abnormal.

First claim

What is claimed is:

1 . A link determining method for an optical packet switching system, comprising:
parsing out, by a control manager, routing information carried in an optical label of an optical packet before switching; generating, by the control manager, reference optical label information and an enabling signal according to the routing information; sending, by the control manager, the reference optical label information and the enabling signal to a link determining device; determining, by the control manager when the enabling signal is active, whether an alarm signal sent by the link determining device is received; and determining, by the control manager according to the alarm signal if the alarm signal sent by the link determining device is received, whether a link corresponding to the alarm signal is abnormal.

2 . The link determining method for an optical packet switching system according to claim 1 , wherein the reference optical label information is at least one type of information comprised in various information types of the routing information; and
the various information types of the routing information comprise source port information, destination port information, packet length information, or priority information.

3 . The link determining method for an optical packet switching system according to claim 1 , wherein the enabling signal is used to trigger the link determining device to detect whether a link is abnormal.

4 . The link determining method for an optical packet switching system according to claim 1 , wherein before the step of determining, by the control manager according to the alarm signal, whether a link corresponding to the alarm signal is abnormal, the method further comprises:
if the alarm signal sent by the link determining device is received, increasing, by the control manager, a quantity of link alarm times by one; and determining, by the control manager, whether the quantity of link alarm times that is increased by one is greater than a preset threshold; and the step of determining, by the control manager according to the alarm signal, whether a link corresponding to the alarm signal is abnormal comprises: if the quantity of link alarm times that is increased by one is greater than the preset threshold, determining, by the control manager, that the link is abnormal.

5 . The link determining method for an optical packet switching system according to claim 4 , wherein after the step of determining, by the control manager, that the link is abnormal, the method further comprises:
updating, by the control manager, link status information in a link status information table from normal to abnormal.

6 . The link determining method for an optical packet switching system according to claim 1 , wherein before the step of generating, by the control manager, reference optical label information and an enabling signal according to the routing information, the method further comprises:
determining, by the control manager, enabling signal activation duration according to the packet length information, wherein the enabling signal activation duration is used to determine a time at which the enabling signal is deactivated; and after the step of determining, by the control manager when the enabling signal is active, whether an alarm signal sent by the link determining device is received, the method further comprises: performing, by the control manager, a zero assignment operation on the quantity of link alarm times when the enabling signal is inactive and if the alarm signal sent by the link determining device is not received.

7 . The link determining method for an optical packet switching system according to claim 1 , wherein the link is a link in a primary optical packet switch or a link in a secondary optical packet switch;
the step of determining, by the control manager according to the alarm signal if the alarm signal sent by the link determining device is received, whether a link corresponding to the alarm signal is abnormal comprises: if an alarm signal that corresponds to the link in the primary optical packet switch and that is sent by the link determining device is received, determining, by the control manager according to the alarm signal that corresponds to the link in the primary optical packet switch, whether the link in the primary optical packet switch is abnormal; and after the step of determining whether the link in the primary optical packet switch is abnormal, the method further comprises: if it is determined that the link in the primary optical packet switch is abnormal, sending, by the control manager, a primary/secondary selection control signal to an optical packet switch, so that the secondary optical packet switch performs optical packet switching; or if an alarm signal that corresponds to the link in the secondary optical packet switch and that is sent by the link determining device is received, determining, by the control manager according to the alarm signal that corresponds to the link in the secondary optical packet switch, whether the link in the secondary optical packet switch is abnormal.

8 . The link determining method for an optical packet switching system according to claim 7 , wherein after the step of determining whether the link in the primary optical packet switch is abnormal, the method further comprises:
if it is determined that the link in the primary optical packet switch is abnormal, updating, by the control manager, link status information in the link status information table from normal to that the primary optical packet switch is abnormal; or after the step of determining, by the control manager, whether the link in the secondary optical packet switch is abnormal, the method further comprises: if it is determined that the link in the secondary optical packet switch is abnormal, updating, by the control manager, link status information in the link status information table from that the primary optical packet switch is abnormal to that the secondary optical packet switch is abnormal.

9 . The link determining method for an optical packet switching system according to claim 1 , wherein after the step of generating, by the control manager, reference optical label information and an enabling signal according to the routing information, the method further comprises:
generating, by the control manager, a selection control signal according to the routing information, and sending the selection control signal to the link determining device, wherein the selection control signal carries identification information corresponding to an output port of the optical packet after switching.

10 . A link determining method for an optical packet switching system, comprising:
receiving, by a link determining device, reference optical label information and an enabling signal that are sent by a control manager; parsing out, by the link determining device according to an information type of the reference optical label information, actual optical label information carried in an optical label of an optical packet after switching; when the enabling signal is active, determining, by the link determining device according to the actual optical label information and the reference optical label information, whether an alarm signal is generated; and when it is determined that the alarm signal is generated, sending, by the link determining device, the alarm signal to the control manager.

11 . The link determining method for an optical packet switching system according to claim 10 , wherein an information type of the actual optical label information is the same as that of the reference optical label information.

Assignees

• Huawei Tech Co Ltd

Inventors

• Yang Xiaoling
• Ma Huixiao

Classifications

• H04L5/0048

  Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091) · CPC title

• H04Q11/0066 Primary

  Provisions for optical burst or packet networks · CPC title

• H04Q11/0062

  Network aspects · CPC title

• H04Q2011/0083

  Testing; Monitoring · CPC title

• H04L41/06

  Management of faults, events, alarms or notifications · CPC title