Patent ID: 11881890
Assignee: HUAWEI TECHNOLOGIES CO., LTD.
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. An electrical layer subnetwork connection protection method, wherein the method comprises:
determining, by a network device comprising a processor, signal status information based on a power of an obtained optical signal, wherein the signal status information is used to indicate a state of a subnetwork connection carrying the optical signal;
filtering, by the network device, the signal status information based on a preset first threshold, wherein the first threshold indicates a minimum duration in which the optical signal is in a valid state; and
determining, by the network device based on the filtered signal status information, whether to switch a currently used first clock to a second clock different from the clock, wherein the first clock or the second clock is used to initialize connection monitoring information in response to the determination of whether to switch the currently used first clock to the second clock.