Method and device for synchronizing quantum data start points in quantum key distribution system
US10523429B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 27, 2017 |
| Grant date | Dec 31, 2019 |
| Priority date | — |
| Expiry date | Jan 6, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/12
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for synchronizing a start-point of quantum data are disclosed. A method of determining a start-point of a quantum key distribution (QKD) protocol, at which a receiving apparatus of a QKD system starts the QKD protocol with a transmitting apparatus, includes receiving, by the receiving apparatus, an optical pulse sequence of a predetermined pattern from the transmitting apparatus, measuring, by the receiving apparatus, a predetermined quantum signal included in the optical pulse sequence, transmitting, by the receiving apparatus, a confirmation signal to the transmitting apparatus when the number of measurements of the predetermined quantum signal reaches a predetermined value, and determining, as the start-point, a point after one period of the optical pulse sequence from a point at which the number of measurements of the predetermined quantum signal has reached the predetermined value, or a point at which the confirmation signal has been transmitted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.