Optical communication device, optical communication system, and method for establishing communication connection

Patent metadata

Field	Value
Publication number	US-12160271-B2
Application number	US-202117767763-A
Country	US
Kind code	B2
Filing date	Mar 9, 2021
Priority date	Apr 23, 2020
Publication date	Dec 3, 2024
Grant date	Dec 3, 2024

Abstract

An optical communication device, an optical communication system, and a method for establishing a communication connection are provided, relating to communications technology. In the optical communication device, the first driving circuit can control, based on the generated first target plaintext, the optical signal transmitting circuit to transmit the first optical signal, and control, based on the generated first key, the optical signal transmitting circuit to transmit the second optical signal. That is, an optical communication device that detects the optical signals can establish, based on the optical signals, a communication connection with the optical communication device that transmits the optical signals.

First claim

What is claimed is:

1. An optical communication device, comprising: a first driving circuit, and an optical signal transmitting circuit connected to the first driving circuit, wherein
the first driving circuit is configured to: generate a first target plaintext, and output a first driving signal to the optical signal transmitting circuit based on the first target plaintext;
and, generate a first key based on the first target plaintext, and output a second driving signal to the optical signal transmitting circuit based on the first key; and
the optical signal transmitting circuit is configured to transmit a first optical signal in response to the first driving signal, and transmit a second optical signal in response to the second driving signal;
wherein the first driving circuit comprises: a first control sub-circuit and a first control signal generating sub-circuit;
the first control sub-circuit is respectively connected to the optical signal transmitting circuit and the first control signal generating sub-circuit, the first control sub-circuit is configured to generate the first target plaintext, generate a first control word set based on the first target plaintext, and send the first control word set to the first control signal generating sub-circuit, the first control word set comprising a plurality of different first control words;
the first control signal generating sub-circuit is configured to generate a first control signal set based on the first control word set, and send the first control signal set to the first control sub-circuit, the first control signal set comprising a plurality of different first control signals having different frequencies; and
the first control sub-circuit is further configured to generate the first key based on the first control signal set, output the second driving signal to the optical signal transmitting circuit based on the first key, and output the first driving signal to the optical signal transmitting circuit based on the first target plaintext.

2. The optical communication device according to claim 1 , wherein the first target plaintext comprises: a first random seed.

3. The optical communication device according to claim 1 , wherein the first control signal generating sub-circuit comprises: a candidate signals generating module and a control signal generating module;
the candidate signals generating module is connected to the control signal generating module, and the candidate signals generating module has a plurality of output terminals; the candidate signals generating module is configured to generate a plurality of candidate signals having the same frequency and different phases, and output the plurality of candidate signals to the control signal generating module through the plurality of output terminals in a one-to-one correspondence, wherein a quantity of the candidate signals is the same as a quantity of the output terminals, and the candidate signals output by any two adjacent output terminals have the same phase difference; and
the control signal generating module is further connected to the first control sub-circuit; the control signal generating module is configured to generate the first control signal set based on the plurality of candidate signals and the first control word set sent by the first control sub-circuit, and send the first control signal set to the first control sub-circuit.

4. The optical communication device according to claim 1 , wherein the first driving circuit is further configured to generate a first target identifier which uniquely identifies the optical communication device, and send an initial driving signal to the optical signal transmitting circuit based on the first target identifier; and
the optical signal transmitting circuit is further configured to transmit a third optical signal in response to the initial driving signal.

5. The optical communication device according to claim 3 , wherein
the first target plaintext comprises: a first random seed;
the first driving circuit is further configured to generate a first target identifier which uniquely identifies the optical communication device, and send an initial driving signal to the optical signal transmitting circuit based on the first target identifier; and
the optical signal transmitting circuit is further configured to transmit a third optical signal in response to the initial driving signal.

6. An optical communication device, comprising: an optical signal receiving circuit, and a second driving circuit connected to the optical signal receiving circuit; wherein
the optical signal receiving circuit is configured to receive a fourth optical signal and a fifth optical signal, convert the fourth optical signal into a first electrical signal, convert the fifth optical signal into a second electrical signal, and send the first electrical signal and the second electrical signal to the second driving circuit; and
the second driving circuit is configured to obtain a second target plaintext based on the first electrical signal, obtain a second key based on the second electrical signal, generate a third key based on the second target plaintext, and verify whether the third key matches the second key;
wherein the second driving circuit comprises: a second control sub-circuit and a second control signal generating sub-circuit;
the second control sub-circuit is respectively connected to the optical signal receiving circuit and the second control signal generating sub-circuit, the second control sub-circuit is configured to obtain the second target plaintext based on the first electrical signal, obtain the second key based on the second electrical signal, generate a second control word set based on the second target plaintext, and send the second control word set to the second control signal generating sub-circuit, the second control word set comprising a plurality of different second control words;
the second control signal generating sub-circuit is configured to generate a second control signal set based on the second control word set, and send the second control signal set to the second control sub-circuit, the second control signal set comprising a plurality of second control signals having different frequencies; and
the second control sub-circuit is further configured to generate the third key based on the second control signal set, and verify whether the third key matches the second key.

7. The optical communication device according to claim 6 , wherein the second target plaintext comprises: a second random seed.

8. The optical communication device according to claim 6 , wherein the optical signal receiving circuit is further configured to receive a sixth optical signal, convert the sixth optical signal into a third electrical signal, and send the third electrical signal to the second driving circuit; and
the second driving circuit is further configured to obtain a second target identifier based on the third electrical signal, search for a stored identifier which is the same as the second target identifier, and if the stored identifier which is the same as the second target identifier is found, perform an operation of obtaining the second target plaintext and the second key.

9. A method for establishing a communication connection, applied to the optical communication device according to claim 1 , the method comprising:
generating a first target plaintext;
transmitting a first optical signal based on the first target plaintext;
generating a first key based on the first target plaintext; and
transmitting a second optical signal based on the first key.

10. A method for establishing a communication connection, applied to the optical communication device according to claim

Assignees

• Beijing Boe Technology Dev Co Ltd
• Boe Technology Group Co Ltd

Inventors

• Wei Xiangye
• Xiu Liming
• Bai Yiming
• Li Xin

Classifications

• H04B10/27

  Arrangements for networking · CPC title

• H04B10/502 Primary

  LED transmitters · CPC title

• H04L9/0819

  Key transport or distribution, i.e. key establishment techniques where one party creates or otherwise obtains a secret value, and securely transfers it to the other(s) (network architectures or network communication protocols for key distribution in a packet data network H04L63/062) · CPC title

• H04L9/0869

  involving random numbers or seeds · CPC title

• H04L9/0861

  Generation of secret information including derivation or calculation of cryptographic keys or passwords · CPC title