Analysis Research On Some Critical Security Issues In IMS Fixed Access Network

IMS (IP Multimedia Core Network Subsystem) is a new form of multimedia services based on IP network. It is recognized as the core technology to address mobile and fixed networks convergence, and to combine differentiated services such as voice, video and data. It is the evolution goal of the next-generation mobile communication network. At present, many carriers are putting into a lot of resources to test and research IMS network, but it is the main direction to research and test IMS fixed access network in our country. Along with this process, there has been a series of security issues, some of which are similar to the security issues that have emerged in the IP network, and they can be solved using the existing technologies. And some of the IMS security issues have been defined in the corresponding technical specifications. However, with the continuous deepening of IMS research and the complex changes of the network environment, IMS fixed access network security remains to be a very important research topic, and many security issues remain to be explored and resolved.In this paper, according to involvement of IMS fixed access network test project, considering IMS fixed access network architecture, the characteristics of IMS fixed terminal and access device, IMS fixed access network communication line, and SBC(Session Border Controller), some solutions are made for the improvements of IMS fixed access network robustness and security, such as the encryption of communication line, the code protection of IMS fixed terminal, the system of SIP attack monitoring. The goal is that IMS fixed access network and the interests of the carriers and users can be well protected by these solutions. It can be convinced that the development of IMS fixed access network will be great to be promoted and proved with the continuous deepening of IMS fixed access network security research.