Design of Security Protection Subsystem of Private Mobile Communication System

A private mobile communication can provide encrypted voice, SMS and other business, and it can implement more than 100 significant tasks of nation and army, becomes the indispensable communication means for office business and various military tasks at all levels of the head quarters. The integration trend of private mobile communication network and internet, is effected by the 3 main factors: technology, service and operating costs. Using the hardware platform of 3G / 4G public cellular mobile communication system and the individualizing software design technology, a virtual private mobile communication platform can be constructed, but the security risks existed in 3G/4G public cellular mobile communication system, such as being used by enemies, will impact the system's security seriously, resulting in leakage of important and sensitive information, even paralysis of the whole system. Therefore, it is necessary.to carry out special security design of mobile communication system.