Radio communication method, radio communication system, and radio communication device

A wireless communication device and wireless communication technology, which are applied in the directions of wireless communication, security communication device, radio transmission system, etc., can solve problems such as key mismatch and achieve the effect of ensuring confidentiality

Inactive Publication Date: 2007-07-04
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In addition, since the base station and the mobile station alternately transmit and receive the pilot signal using the TDD method, the channel estimation value calculated by the base station and the channel estimation value calculated by the mobile station are different due to time fluctuations in noise contained in the pilot signal, etc. There must be a difference between the values
And, if the difference of such channel estimation values ​​exceeds the decision limit of quantization in step ST30, there will be a problem that the key generated by the base station does not match the key generated by the mobile station.

Method used

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  • Radio communication method, radio communication system, and radio communication device
  • Radio communication method, radio communication system, and radio communication device
  • Radio communication method, radio communication system, and radio communication device

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Experimental program
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Embodiment approach 1

[0045] FIG. 2 is a block diagram showing the configuration of a base station including the radio communication device 100 according to the first embodiment.

[0046] The wireless communication device 100 includes: two antenna elements 101-1 and 101-2, two pilot receiving units 102-1 and 102-2, a channel estimation unit 103, a channel matching determination unit 105, a switch 106, and a related information calculation unit 108 . A related information sending unit 109 , a pilot sending control unit 111 , two pilot sending units 112 - 1 and 112 - 2 , and a key generating unit 120 . Furthermore, the key generation unit 120 includes: a quantization unit 121 , an error correction unit 122 , and a key (key) matching confirmation unit 123 .

[0047] Antenna elements 101-1 and 101-2 capture radio signals from mobile stations serving as communication targets, respectively, and input the received signals to pilot receiving sections 102-1 and 102-2.

[0048] The pilot receiving units 102...

Embodiment approach 2

[0121] In this embodiment, the base station and the mobile station respectively perform error correction on the generated keys, and control their error correction capability with reference to the channel correlation value ρ. Hereinafter, only the differences between this embodiment and Embodiment 1 will be described to avoid redundant description.

[0122] FIG. 7 is a block diagram showing the configuration of a base station including the radio communication device 600 according to this embodiment. Wireless communication device 600 includes channel matching determining section 605 instead of channel matching determining section 105 in wireless communication device 100 according to Embodiment 1 described above, and key generating section 620 instead of key generating section 120 . The key generation unit 620 has an error correction unit 622 instead of the error correction unit 122 in the key generation unit 120 .

[0123] Channel matching determination section 605 determines t...

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Abstract

There are disclosed a radio communication device and others capable of generating in a short time a secret key common to a base station and a mobile station in a radio communication system using the MIMO technique and starting the encrypted communication at an early stage. In this device, in ST545, when a channel coincidence judgment unit (105) and a channel coincidence judgment processing unit (205) respectively judge that the channel matrix generated by the base station completely coincides with the channel matrix generated by the mobile station or they do not coincide completely but they can coincide finally by error correction of the secret key or the like, according to the judgment result indicated in the channel coincidence judgment signal generated in ST540-2, ST545 is followed by ST550. On the other hand, when the channel matrix generated by the base station does not coincide completely with the channel matrix generated by the mobile station and they do not coincide finally even after error correction of the secret key, ST510 is again executed after ST545.

Description

technical field [0001] The present invention relates to a wireless communication method, a wireless communication system, and a wireless communication device utilizing a multiple input multiple output (MIMO) technique in which a plurality of antenna elements are used to receive wireless signals transmitted by a plurality of antenna elements, Wireless communication is thus performed. Background technique [0002] With the development of the information society in recent years, mobile wireless communication technology has been rapidly popularized due to its convenience. Since wireless signals are relatively easy to be intercepted by a third party in mobile wireless communication, measures to prevent eavesdropping of wireless signals are essential when transmitting and receiving personal information or confidential information of companies in mobile wireless communication. [0003] Encryption technology is generally used as an anti-eavesdropping countermeasure in mobile wirele...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): H04L9/08H04Q7/38H04W12/00H04W12/02
CPCH04L2209/80H04L2209/34H04L9/08H04W12/02H04L9/0875H04W12/041H04B7/0413H04L25/0202
Inventor今井友裕汤田泰明今村大地
OwnerPANASONIC CORP