System and method for realizing encrypted communication in mobile communication system

Abstract

In the invention, present packet data network for data transmission is adopted by mobile communication system, and voice communication is encrypted through packet switching mode in IP network. Thus, the disclosed method combines data network with wireless network for realizing encrypted voice communication so as to change mode of structure and transmission of telephone service. Advantages of the invention are: low-cost IP network fee, expanding service of IP service to mobile communication network, supporting voice, image and video etc. multimedia transmission, according with IP network development and meeting need of encrypted communication.

Description

technical field [0001] The present invention relates to a mobile communication system, in particular to a system and method for realizing encrypted communication by using an IP phone in the mobile communication system. Background technique [0002] With the continuous development of mobile communication technology, the requirements for it are getting higher and higher. Not only the mobile communication system is required to have the characteristics of high quality, multi-function, and high reliability, but also more and more requirements are put forward for security and confidentiality. high demands. [0003] Taking the CDMA mobile communication system as an example, the use of spread spectrum communication technology and air interface encryption improves the concealment and security of the cellular mobile communication system to a certain extent, but this security technology cannot meet the requirements of military communication, finance, and national security. Departmenta...

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Problems solved by technology

[0003] Taking the CDMA mobile communication system as an example, the use of spread spectrum communication technology and air interface encryption improves the concealment and security of the cellular mobile communication system to a certain extent, but this security technology cannot meet the requirements of military communication, finance, and national security. Departmental Security Needs

[0004] At present, in the CDMA system, the existing encryption communication implementation method is to use the existing circuit switching network used to transmit voice in the CDMA system, and implement encryption by using the traditional circuit switching method through the Public Switched Telephone Network (PSTN). Communication, this method not only has high transmission cost, but also is not conducive to supporting multimedia transmission such as images and videos on the terminal

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