TRANSMITTING DEVICE, RECEIVING DEVICE, WIRELESS COMMUNICATION SYSTEM AND METHOD FOR CONTROLLING WIRELESS COMMUNICATION SYSTEM

• US 20130336484A1
• Filed: 05/01/2013
• Published: 12/19/2013
• Est. Priority Date: 06/13/2012
• Status: Active Grant

• Current Assignee: Ricoh Company Limited
• Original Assignee: Bin Da, Haihua Yu, Wang Wei, Yan Sun
• Inventors: SUN, Yan, Wang, Wei, Yu, Haihua, Da, Bin
• Granted Patent: US 9,055,436 B2
• Time in Patent Office: Days
• US Class Current: 380/270
• CPC Class Codes: H04B 10/1149 Arrangements for indoor wireless networking of information
• CPC Class Codes: H04L 2209/08 Randomization, e.g. dummy operations or using noise
• CPC Class Codes: H04L 2209/34 Encoding or coding, e.g. Huffman coding or error correction
• CPC Class Codes: H04L 2209/80 Wireless network architectures or network communication protocols for wireless network security H04W12/00
• CPC Class Codes: H04L 2463/061 applying further key derivation, e.g. deriving traffic keys from a pair-wise master key cryptographic mechanisms or cryptographic arrangements for generation of secret information including derivation or calculation of cryptographic keys or passwords H04L9/0861
• CPC Class Codes: H04L 63/18 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 Class Codes: H04L 9/0869 involving random numbers or seeds
• CPC Class Codes: H04L 9/12 Transmitting and receiving encryption devices synchronised or initially set up in a particular manner
• CPC Class Codes: H04W 12/04 Key management, e.g. using generic bootstrapping architecture [GBA]
• CPC Class Codes: H04W 12/50 Secure pairing of devices
• CPC Class Codes: H04W 12/64 using geofenced areas
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]

Abstract

A transmitting device, a receiving device, a wireless communication system and a method for controlling the wireless communication system are used for creating a secure wireless communication network of a limited area. The transmitting device comprises: one or more transmitters configured to transmit wireless signals, and create the limited area by a coverage scope of the wireless signals; a cryptography key generating unit configured to generate a cryptography key for the wireless signals; a cryptography key encoding unit configured to encode the cryptography key to a cryptography key frame; and a cryptography key scheduling unit configured to schedule the cryptography key frame so as to control the transmitter to transmit the wireless signals including the cryptography key frame.

Claims

1. A transmitting device for creating a secure wireless communication network of a limited area, comprising:

one or more transmitters configured to transmit wireless signals, and create the limited area by a coverage scope of the wireless signals;

a cryptography key generating unit configured to generate a cryptography key for the wireless signals;

a cryptography key encoding unit configured to encode the cryptography key to a cryptography key frame; and

a cryptography key scheduling unit configured to schedule the cryptography key frame so as to control the transmitter to transmit the wireless signals including the cryptography key frame.

2. The transmitting device according to claim 1, wherein the wireless signals are infrared signals.

3. The transmitting device according to claim 2, wherein a coverage scope of an infrared transmitter is limited according to the following equation 1:

4. The transmitting device according to claim 2, wherein the coverage scope of two or more infrared transmitters is limited according to transmitting angles of each infrared transmitter (α

), transmitting distances of each infrared transmitter (d), transmitting powers of each infrared transmitter (I,Pt,Pr₀) and positions and orientations of each infrared transmitter (x,y,{right arrow over (γ

)}).

5. The transmitting device according to claim 1, wherein the cryptography key generating unit is configured to generate the cryptography key according to a real random noise.

6. The transmitting device according to claim 1, wherein the cryptography key generating unit is configured to generate the cryptography key in real-time.

7. The transmitting device according to claim 1, wherein the cryptography key frame having a frame structure composed of a header, a transmitter ID, a frame sequence number, a time stamp, a user design, a received information, a key and a self-check code.

8. A receiving device for receiving the wireless signals transmitted by the transmitting device according to claim 1, so as to access the wireless communication network created by the wireless signals, comprising:

a receiver configured to receive the wireless signals;

a cryptography key decoding unit configured to decode the cryptography key frame of the wireless signals so as to obtain the cryptography key;

a sequence adjustment and synchronization unit configured to adjust a sequence of the obtained plural cryptography keys so as to synchronize the plural cryptography keys;

an area cryptography key generating unit configured to generate an area cryptography key according to the synchronized plural cryptography keys; and

a network access unit configured to access the wireless communication network based on the area cryptography key.

9. A wireless communication system for creating a secure wireless communication network of a limited area, comprising:

a transmitting device for creating the secure wireless communication network of the limited area, wherein the transmitting device comprises

one or more transmitters configured to transmit wireless signals, and create the limited area by a coverage scope of the wireless signals;

a cryptography key generating unit configured to generate a cryptography key for the wireless signals;

a cryptography key encoding unit configured to encode the cryptography key to a cryptography key frame; and

a cryptography key scheduling unit configured to schedule the cryptography key frame so as to control the transmitter to transmit the wireless signals including the cryptography key frame, and

a receiving device for receiving the wireless signals transmitted by the transmitting device, so as to access the wireless communication network created by the wireless signals, wherein the receiving device comprises

a receiver configured to receive the wireless signals;

a cryptography key decoding unit configured to decode the cryptography key frame of the wireless signals so as to obtain the cryptography key;

a sequence adjustment and synchronization unit configured to adjust a sequence of the obtained plural cryptography keys so as to synchronize the plural cryptography keys;

an area cryptography key generating unit configured to generate an area cryptography key according to the synchronized plural cryptography keys; and

a network access unit configured to access the wireless communication network based on the area cryptography key.

10. A method for controlling the wireless communication system for creating a secure wireless communication network of a limited area, comprising:

a step of transmitting wireless signals, and creating the limited area by a coverage scope of the wireless signals;

a step of generating a cryptography key for the wireless signals;

a step of encoding the cryptography key to a cryptography key frame;

a step of scheduling the cryptography key frame so as to control the transmitted wireless signals including the cryptography key frame;

a step of receiving the wireless signals;

a step of decoding the cryptography key frame of the wireless signals so as to obtain the cryptography key;

a step of adjusting a sequence of the obtained plural cryptography keys so as to synchronize the plural cryptography keys;

a step of generating an area cryptography key according to the synchronized plural cryptography keys; and

a step of accessing the wireless communication network based on the area cryptography key.