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Voice transmission encryption method of DMR (digital mobile radio) communication terminal

A communication terminal and voice transmission technology, which is applied in the direction of confidential communication, two-party line system station, user identity/authority verification, etc. It can solve the problems of inability to ensure call security and confidentiality, and unspecified voice call encryption, so as to achieve confidentiality sex, good confidentiality effect

Inactive Publication Date: 2012-01-04
KIRISUN COMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] DMR is the abbreviation of Digital Mobile Radio, which is the protocol standard used by European digital walkie-talkies. The DMR protocol does not specify how to encrypt voice calls. If DMR communication terminals are used in public security and other fields that require encrypted voice, the security of calls cannot be achieved. confidentiality

Method used

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  • Voice transmission encryption method of DMR (digital mobile radio) communication terminal
  • Voice transmission encryption method of DMR (digital mobile radio) communication terminal
  • Voice transmission encryption method of DMR (digital mobile radio) communication terminal

Examples

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Embodiment Construction

[0018] This embodiment is a preferred implementation mode of the present invention, and other principles and basic structures that are the same or similar to this embodiment are within the protection scope of the present invention.

[0019] The present invention is mainly a voice transmission encryption method of a DMR communication terminal, which is provided with a corresponding key table in the DMR communication terminal sender and the DMR communication terminal receiver, and the DMR communication terminal sender uses the key in the key table The voice information is encrypted and sent, and the key index code information is sent together. The receiver of the DMR communication terminal finds the corresponding key in the key table according to the key index code information to decrypt the voice information and play it. The DMR protocol stipulates that a DMR terminal transmits a superframe every 360ms during a voice call, please refer to the attached figure 1 And attached fi...

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Abstract

The invention discloses a voice transmission encryption method of a DMR (digital mobile radio) communication terminal. In the method, a corresponding key table is arranged in a DMR communication terminal sender and a DMR communication terminal receiver; the DMR communication terminal sender uses keys in the key table to encrypt voice information and send the voice information and key index code information; and the DMR communication terminal receiver searches the corresponding keys in the key table to decrypt and play the voice information in accordance with the key index code information. In the method, when the DMR communication terminal converses and sends the voice superframes, a valid data region of 48BIT in F frames is utilized to transfer the key index information; and the keys are updated once per 360ms, so that the keys are updated in real time to preferably realize the confidentiality of the conversation.

Description

[0001] technical field [0002] The invention discloses a voice transmission encryption method, in particular to a voice transmission encryption method of a DMR communication terminal. Background technique [0003] DMR is the abbreviation of Digital Mobile Radio, which is the protocol standard used by European digital walkie-talkies. The DMR protocol does not specify how to encrypt voice calls. If DMR communication terminals are used in public security and other fields that require encrypted voice, the security of calls cannot be achieved. confidentiality. Contents of the invention [0004] Aiming at the above-mentioned shortcoming that the DMR communication terminal in the prior art does not have voice call encryption, the present invention provides a voice transmission encryption method for a DMR communication terminal, which uses a key to encrypt and send voice information, and at the same time, encrypts the encrypted The key index table information is sent tog...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04K1/02H04Q5/24H04L9/32
Inventor 付文良赵蕊
Owner KIRISUN COMM
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