A Design And Implementation Of High Available 3G Core Network Equipment

The development of mobile communication needs higher standard in service continuity, especially for carrier-grade equipments which are required to be high available. In the design and implementation of high available software sub-system, which belongs to the development of the 3G mobile communication core network equipments, the writer attempts to get through the complexity of high availability design. Bases on elaborate analysis and argumentation of the key factors needed to think about, one model is prompted and composed by object-based state-driven mechanism, unified message transmit platform, separated programs redundancy and data redundancy.In the course of design, characteristic of the universal hardware platform have been completely analyzed from the point of view of high availability, such as the ability in hot swapping, inter-communicating, fault detection and control, and also get the proof in theory. After the preparation in realism area and theory area, with the fact that high availability is composed by hardware and software reliability and maintainability, one way to realize high availability is put forward. That is to improve software reliability and combine hardware redundancy and software maintenance, so as to get the ability to deal with hardware fault. The object-based state-driven mechanism is used to be the basic model of system control, with the profit to figure out the inter-control logic relationship between multiple functional entities; With constructed unified message transmission platform, multi-level control system is built up; With the separate of program-redundancy and data-redundancy, system performance and resources are united. Finally, the result of the analysis of high availability in logic and performance shows that the whole solution has been proven to be able to achieve the goal of high availability.