Design And Implementation Of CSCF Server Software Simulation Based On 3GPP IMS Domain

At present, our country's mobile communication technology is being in from 2G to the 3G evolution high speed development time, not only has used the more advanced wide band CDMA technology in the wireless system, in core network aspect also from electric circuit exchange to grouping exchange transformation. IMS is the core network aspect motion multimedia service solution which 3GPP proposed, with by skeleton next generation network (NGN).Although the IMS technological development is very quick, but at present in domestic does not have the scale commercial IMS network and the necessary IMS equipment. Based on this realistic situation, researched and developed the IMS network equipment already to become the telecommunication equipment business a new focal point. In order to when develops the equipment balances the risk and the income, uses the software simulation the way to save the hardware investment and the discovery technology difficulty solves this kind of question sharp weapon.Carries on software simulation this domain to the IMS equipment, at present does not have the very big progress, therefore, it is necessary to study.This article in to composes the IMS core network the equipment to carry on the research analysis in the foundation, has carried on the software simulation to main center node CSCF.First, carries on the simulation software in view of the CSCF server the demand analysis, the design simulation software construction. Then, based on its software movement platform RedHat the Linux operating system, as well as the Datang dispatcher software, the Datang TCP/IP correspondence software and RADVision upper formation application software platforms and so on SIP agreement stack, designed the CSCF server simulation software user turning on function, the registration/cancelled the function, the conversation management and the user data management and so on the main function. In this foundation, realized one to conform to IMS the standard minimum CSCF simulation system.Finally, in the article also discussed the technical difficulty which summarizes in the research process and analyzes. In the article designs the CSCF simulation system is a real CSCF equipment simplification and the essence, and maintains the connection to be consistent with the standard, has certain versatility, researches and develops the real CSCF equipment to the later period to have certain reference value. The test result proved that, the CSCF simulation system may simulate the real SIP signaling news and may make a connection the P2P telephone, this to researches and develops the hardware the reference significance to be big.The partial achievements realizes which using this simulation software design proposal already successfully applied the Datang telecommunication IMS equipment in the research and development, and has obtained the good application effect.Has effectively solved the equipment research and development initial period hardware investment cost problem through this software simulation CSCF server, also simultaneously reduced the research and development cost, discovered the technical difficulty at the same time raised the IMS equipment research and development technical level, has grasped a part of innate intellectual property rights technology, reduced the domestic and foreign similar technical research and development disparity.Even if is IMS in a core network CSCF system, when carries on the software simulation involves the aspect of knowledge quite is also broad, this article has only realized a minimum CSCF simulation software system, later in the software middleware technology, the high reliable distributional memory data bank technology, the general telecommunication level software online promotion technology, to the fixed terminal and the wireless mobile termination IMS warning power method, the CSCF server breakdown which if will be connected restores processing, the CSCF memory database access and the retrieval, service triggering mechanism aspects and so on realization method does further studies.