Design of radio resource control module in a satellite mobile communication protocol stack

Aimed at satisfying the demand for mobile satellite service in China, the architecture and design methodology of radio resource control (RRC) module in a mobile satellite system are proposed and introduced in this paper. The system software hierarchy of the mobile terminal and the function components partition of RRC module are described at first. Then the hierarchical finite state machine methodology is introduced and adopted in the implementation to handle the high complexity and concurrence of RRC protocol. By using this methodology, the efficiency of protocol abstraction, function component partition and coding is improved significantly; the maintainability and evolutionary ability of the design are both evidently enhanced.