Research On The Security Of LTE-A Relay System

As a resource, information is very important, its universality, sharing, value-added, process ability and multi-effectivity make it especially important for the human society, and wireless communication technology is used to deliver useful information for humans. With the rapid development of human society, wireless communication has played a more and more important role in our daily lives and gone deep into various aspects of society.From the first-generation analog communication system to the widespread usage of second-generation digital communication system, especially the great success of GSM, and now the promotion of3G technology, the communication's quality, speed, business type and security are constantly being improved.In order to meet the growing demand, it is need to continuously research and improve communication technology. As the transition of3G and4G, the standardization work of LTE system has been completed. And the research and standardization work of key technologies for LTE-Advanced system are in progress. As the radio relay technology, Relay is one of the most important technologies for LTE-A, the mobile terminal can access the network via a Relay Node to get Internet service. Relay technology can reduce the space consumption of wireless links, increase the signal-to-noise ratio, improve the channel capacity of edge users, and complete coverage of remote areas and hot spots, etc.Information security is an integral part of in wireless communication technology, its purpose is to protect the information system or information network's resourses from all types of threats, interference and sabotage, in other words, to ensure information security. The use of network business is popular today, with the growing numbers of various wireless network services, the increasing sensitivity demand of data transmission over the radio channel, the big number of mobile users and the improvement of information theft technology, it is particularly important to ensure the information security. More and more data show that the loss caused by wireless security issues has been growing much. And at the same time, more and more enterprises and mobile users have realized the seriousness and importance of wireless communication's security and ask for higher wireless communication's security.This paper mainly studies the security of LTE-Advanced Relay system. Based on the LTE system security architecture, it makes research on the Relay system security architecture, analyses the unsolved security problems and improves the safety-related technology, so as to enhance Relay system security. This research focuses on four aspects:1. The binding between RN and UICC.2. Fetch of CRL distribution point address.3. Solution of threat "RN stay as an UE".4. Association of mixed secret "Ko" between RN and DeNB.The article first introduces the development process of wireless communication system's security mechanisms and specifically addresses the physical structure of Relay System. On this basis, it then analyses the Relay system's security architecture and gives the new threats that Relay system will be faced. Contrast with the existing Relay system security, we conclude the unsolved Relay security's threats and security technologies needed to be strengthen. Finally, from the above four aspects of research, we obtain the corresponding most optimal solutions and verify their feasibility by BAN logic analysis method and Matlab simulation, so the Relay security system can be improved to provide more secure communication.