US 11,431,407 B2Granted

Hardware-based protection group switching method and optical communication equipment

AssigneeSino-Telecom Technology Co., Inc.

InventorsLei Hou, Zhiyuan Wu, Hu Xie, Lin Li

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Abstract

Disclosed is a hardware-based protection group switching method and optical communication equipment. The method includes: transmitting, by a FPGA in equipment when detecting switching triggering information indicating that a local network element possibly has switching triggering situations, the switching triggering information to each protection state machine through a hardware bus; determining, by each protection state machine according to related traffic flow information, one or more related protection groups that are possibly affected by each switching triggering situation, and generating each corresponding switching triggering condition according to each piece of switching triggering information; separately querying, by the protection state machines corresponding to the related protection groups, a pre-stored table for APS protocol operation results; and updating a cross connection table according to the operation results, and configuring the updated cross connection table to a cross connection chip or a packet switching chip through the FPGA.

Claims24

Dependent claims

A hardware-based protection group switching method, applied to optical communication equipment used as a local network element, wherein the optical communication equipment comprises a field programmable gate array (FPGA), a plurality of protection state machines is provided in the FPGA, the plurality of protection state machines each corresponds to a protection group, the method comprises:

transmitting, by the FPGA, a switching triggering information to each protection state machine via a hardware bus when detecting the switching triggering information indicating that the local network element has switching triggering situations;
determining, by each protection state machine according to traffic flow information related to the switching triggering information, one or more related protection groups that are affected by each switching triggering situation, and generating a corresponding switching triggering condition according to the switching triggering information;
separately querying, by each protection state machine corresponding to the related protection groups, one or more pre-stored tables for automatic protection switching (APS) protocol operation results pre-associated with the switching triggering condition affecting the related protection groups;
and
updating, by each protection state machine, a cross connection table according to the operation results, and configuring the updated cross connection table to a cross connection chip or a packet switching chip through the FPGA.

2 more elements

An optical communication equipment, used as a local network element in an optical transport network (OTN), wherein the optical communication equipment comprises:

a field programmable gate array (FPGA), wherein a plurality of protection state machines is provided in the FPGA, and the plurality of protection state machines each corresponds to protection groups, wherein
the FPGA is configured to
transmit a switching triggering information to each protection state machine through a hardware bus when detecting the switching triggering information indicating that the local network element has switching triggering situations;
determine, by each protection state machine according to traffic flow information related to the switching triggering information, one or more related protection groups affected by each switching triggering situation,
generate a corresponding switching triggering condition according to the switching triggering information;
and
separately query, by each protection state machine corresponding to the related protection groups, one or more pre-stored tables for automatic protection switching (APS) protocol operation results pre-associated with the switching triggering condition possibly affecting the related protection groups, and the FPGA is in communication connection to a cross connection chip or a packet switching chip, and is configured to update a cross connection table according to the operation results, and configure the updated cross connection table to the cross connection chip or the packet switching chip.

4 more elements

Dependencies are inferred from the claim text.