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Method of initial vector generation, transmission, and synchronization of digital cellular mobile communication system

A technology of cellular mobile communication and initial vector, which is applied in the field of generation and transmission synchronization of initial vector of digital cellular mobile communication system, can solve the problems of large number of initial vector samples, large transmission overhead of encrypted initial vector and complicated synchronization, and achieves enhanced security, Reduce transmission overhead and avoid the effect of occupying huge resources

Inactive Publication Date: 2008-05-14
成都三零瑞通移动通信有限公司
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Problems solved by technology

[0003] The purpose of the present invention is to provide a method that does not damage the transmission service, has a large number of initial vector samples, high efficiency, and good security, and can better solve the problems of large and complex transmission overhead of encrypted initial vectors in digital cellular mobile communication systems. A method for generating, transmitting and synchronizing digitally encrypted initial vectors by link layer sliding window round numbers and data frame numbers

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  • Method of initial vector generation, transmission, and synchronization of digital cellular mobile communication system
  • Method of initial vector generation, transmission, and synchronization of digital cellular mobile communication system
  • Method of initial vector generation, transmission, and synchronization of digital cellular mobile communication system

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Embodiment Construction

[0016] The simple communication model of the new third-generation mobile communication technology LAS-PDMA is as follows: figure 1 shown. Over-the-air encryption is implemented between the mobile terminal and the base station transceiver, and the encryption level is located at the logical link control layer. figure 2 A specific protocol layer model is given. figure 2 The RLC in is the logical link control layer, and the LLE is the link encryption sublayer. The link encryption sublayer is the functional realization entity of air link encryption. In the LAS-PDMA system, for real-time services such as voice, image, and multimedia, the encryption method of serial cipher is adopted. To realize the data encryption in the serial cipher mode, the problem of password synchronization will be involved. The synchronization method can adopt the method of frame sequence number plus round number.

[0017] The logical link control layer data frame format is as follows:

[0018] ...

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Abstract

This invention discloses a method for generating, transferring and synchronizing digital encrypting initial vector in digital cellular mobile communication system, which is characteristic of using link layer data frame number and data transmission slide window turn number as initial vector, the slide window turn number to compose initial vector is synchronously stored in mobile terminal and base station transmitter / receiver without transmitting in space, two reverse turn number of logic link control unit are determined by link management information, the turn number in added with 1 when the transmitted number of data frame of transmission end is form 1023 returning 0, the receiving end judges each data turn number according to window position and data frame number field, when in cross area switching the new base station transmitter / receiver applies current turn number to old base station transmitter / receiver through base station controller, the latter transmits the turn number to the former to keep the initial vector synchronization.

Description

technical field [0001] The invention relates to a generation, transmission and synchronization method of a digital encryption initial vector in a digital cellular mobile communication system. Background technique [0002] In the digital encryption communication system, realizing the random change of the initial vector of each password synchronization encryption algorithm plays an important role in improving the security of the communication system. The digital data transmitted by the existing digital cellular mobile communication system generally adopts the frame stealing method to realize the generation, transmission and synchronization of the encryption initialization vector. Using the frame sequence number as the encrypted initial vector has problems such as poor randomness of the encrypted initial vector and fewer samples of the encrypted initial vector; while the method of frame misappropriation diverts a specific frame to transmit the initial vector, which has mobile d...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04Q7/38H04L9/00H04W12/02H04B7/26
Inventor 虞忠辉谢宇赖增桂
Owner 成都三零瑞通移动通信有限公司
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