System for transmitting a data signal in a network, method, mobile transmitting device and network device

Patent metadata

Field	Value
Publication number	US-9681293-B2
Application number	US-201414488940-A
Country	US
Kind code	B2
Filing date	Sep 17, 2014
Priority date	Dec 12, 2011
Publication date	Jun 13, 2017
Grant date	Jun 13, 2017

Abstract

A system for transmitting a data signal is provided, comprising a plurality of network devices; a network connecting the plurality of network devices based on at least a first communication carrier, wherein the first communication carrier is a wired communication carrier; a network key generator configured to generate a network key; a mobile transmitting device configured to transmit the network key to at least one of the plurality of network devices on a second communication carrier, wherein the second communication carrier is a wireless carrier, and wherein the network devices are configured to communicate with the other network devices based on a link encryption key based on the network key. A corresponding method, a mobile transmitting device and a network device are provided as well.

First claim

The invention claimed is:

1. A system for transmitting a data signal, comprising:
a plurality of network devices, including a first fixed network device and a second fixed network device;
a network connecting the plurality of network devices based on at least a first communication carrier, the first communication carrier being a wired communication carrier;
a network key generator configured to generate a network key; and
a mobile transmitting device, different from the plurality of network devices, configured to transmit the network key to the first fixed network device and the second fixed network device of the plurality of network devices on a second communication carrier, the second communication carrier being a near-field communication carrier,
wherein the first and second fixed network devices are configured to communicate with each other via the wired communication carrier based on a link encryption key based on the network key, and
wherein the mobile transmitting device is configured to provide a selection to a user regarding whether the network key is to be generated anew by the mobile transmitting device, received from a third fixed network device of the plurality of network devices, different from the first and second fixed network devices, or retrieved from memory of the mobile transmitting device,
wherein the network is based on a third communication carrier, the system further comprising:
a link encryption generator configured to generate a further link encryption key for the third communication carrier based on the network key, and
wherein the network devices are configured to transmit the data signal between the network devices on the third communication carrier based on the further link encryption key.

2. The system according to claim 1 , wherein the first communication carrier is a power line communication (PLC) carrier.

3. The system according to claim 1 , wherein said mobile transmitting device is configured to receive the network key from another mobile transmitting device via the near-field communication carrier.

4. The system according to claim 3 , wherein, responsive to said mobile transmitting device receiving the network key from said another mobile transmitting device via the near-field communication carrier, said mobile transmitting device and said another transmitting mobile device arbitrate which one of said mobile transmitting devices will retain the network key.

5. The system according to claim 1 , wherein said mobile transmitting device is configured to receive the network key from the third fixed network device of the plurality of network devices via the near-field communication carrier.

6. The system according to claim 1 , wherein said mobile transmitting device includes the link encryption key and is configured to communicate with the first and second fixed network devices via the wired communication carrier based on the link encryption key.

7. The system according to claim 1 , wherein the link encryption key is generated in each of the first and second fixed network devices.

8. The system according to claim 1 , wherein the network key generator is in the mobile transmitting device.

9. The system according to claim 1 , wherein the network is a meshed home network.

10. The system according to claim 1 , wherein the near-field communication carrier has a range of five centimeters or less.

11. The system according to claim 1 , wherein the link encryption key is different from the network key.

12. The system according to claim 1 , wherein at least one of the first fixed network device and the second fixed network device is a multiple-in multiple-out (MIMO) power line communication (PLC) device.

13. A method for transmitting a data signal in a network including a plurality of network devices, including a first fixed network device and a second fixed network device, based on at least a first communication carrier, the first communication carrier being a wired communication carrier, the method comprising:
providing a selection, at a mobile transmitting device, which is different from the plurality of network devices, whether a network key is to be generated anew by the mobile transmitting device, received from a third fixed network device of the plurality of network devices, different from the first and second fixed network devices, or retrieved from memory of the mobile transmitting device;
after said providing the selection, transmitting the network key from the mobile transmitting device to the first fixed network device and the second fixed network device of the plurality of network devices on a second communication carrier, the second communication carrier being a near-field communication carrier; and
transmitting the data signal between the first and second fixed network devices on the first communication carrier based on a link encryption key that is based on the network key,
wherein the network is based on a third communication carrier, the method further comprising:
generating a further link encryption key for the third communication carrier based on the network key; and
transmitting the data signal between the network devices on the third communication carrier based on the further link encryption key.

14. The method according to claim 13 , wherein the first communication carrier is a power line communication carrier, a digital-subscriber-line carrier, a coaxial line carrier, and Ethernet carrier, or a twisted-pair line carrier.

15. The method according to claim 13 , wherein said transmitting the network key is performed using circuitry of the mobile transmitting device.

16. A mobile transmitting device for transmitting a network key for communicating between a plurality of network devices, including a first stationary network device and a second stationary network device, using a link encryption key based on the network key, and using a first communication carrier, the first communication carrier being a wired communication carrier, the mobile transmitting device comprising:
memory to store the network key;
circuitry configured to select whether the network key is to be generated anew by the mobile transmitting device, received from a third stationary network device of the plurality of network devices, different from the first and second stationary network devices, or retrieved from the memory of the mobile transmitting device; and
interface circuitry configured to transmit the network key to the first stationary network device and the second stationary network device using a second communication carrier, the second communication carrier being a near-field communication carrier,
wherein the network key is to provide the link encryption key for communicating between the first stationary network device and the second stationary network device using the first communication carrier, which is the wired communication carrier.

17. A stationary network device for transmitting a data signal on a network based on a first communication carrier and a link encryption key to at least another stationary network device, the first communication carrier being a wired communication carrier, the stationary network device comprising:
interface circuitry of the stationary network device configured to receive a network key based on a second communication carrier, the second communication carrier being a near-field communication carrier; and
a link encryption key generator of the stationary network device configured to generate the link encryption key based on the network key,
wherein the network key is to provide the link encryption key for communi

Assignees

• Sony Corp

Inventors

• Schwager Andreas

Classifications

• H04L63/062 Primary

  for key distribution, e.g. centrally by trusted party (cryptographic mechanisms or cryptographic arrangements for key distribution involving a central third party H04L9/0819) · CPC title

• H04L9/00

  {Cryptographic mechanisms or cryptographic} arrangements for secret or secure communications; Network security protocols · CPC title

• H04B7/00

  Radio transmission systems, i.e. using radiation field (H04B10/00, H04B15/00 take precedence) · CPC title

• H04L63/18

  using different networks or channels, e.g. using out of band channels (cryptographic mechanisms or cryptographic arrangements for key distribution involving distinctive intermediate devices or communication paths H04L9/0827; cryptographic mechanisms or cryptographic arrangements for authentication using a plurality of channels H04L9/3215) · CPC title

• H04L9/0861

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