Nokia Technologies Oy

Huawei Marine Networks Co., Ltd.

Guangjun Wang

Chaobin Guo

Maokun Han

Ziyan Chen

Yingxin Hu

Daizhen Chao

A method, apparatus and a computer program is provided. The apparatus comprises: at least one processor; and at least one memory storing computer program code configured, working with the at least one processor, to cause at least the following to be performed: responding to user input by switching a device from an unlocked state to a locked state; and setting a user input process for switching the device from the locked state to the unlocked state, in dependence upon the user input provided to switch the device from the unlocked state to the locked state.

Switching a device between a locked state and an unlocked state

The present invention provides an optical time-domain reflectometry signal detection method, including the following steps: modulating, under the control of a correlation code pattern sequence respectively, n detection optical signals transmitted by detection light sources of different wavelengths into n pulse optical signals, where n is a natural number greater than or equal to 2; combining the n pulse optical signals and outputting a detection optical signal to an optical fiber under test; receiving a backscattered optical signal from the optical fiber under test and dividing the backscattered optical signal into n optical signals according to wavelengths; and performing correlation processing on the n optical signals according to the correlation code pattern sequence and outputting a correlation optical time-domain reflectometry signal. The present invention further provides an optical time-domain reflectometry signal detection apparatus.

Optical time-domain reflectometry signal detection method and apparatus

Growing community of inventors

Beijing, China

Guangjun Wang