Research On Secrecy Oriented Resource Arrangement In D2D Communication Of Underlay Mode

Along with the growing popularization and development of mobile s application in daily life and work, wireless communication is becoming an indispensable technology of great importance to our society. How to satisfy the increasing demands for more and better mobile services will be a important question requiring to wireless communication techniques. Meanwhile, extensive attentions have also been paid to the secrecy of wireless communication due to the openness of radio media.Targeting at the inefficient use of spectrum resources in space of cellular network, the D2D (Device-to-Device) technology has realized increases in the reuse of spectrum and throughput with its short-range transmission. In recent years, D2D communication under control of operators is one of the hot points of researches. Starting from the aspect of physical layer security, this paper researches on resources scheduling strategies of base station controlled D2D communication, and the application of cooperative security techniques. The major research contents and innovations are as follows:According to the requirements of transmission rate and secrecy in D2D communication, a secure approach of spectrum reuse scheduling with relays is proposed. Abilities of three low complexity reuse algorithms are compared, such as rate and security. Combined with the analysis results and the security target, a proper combination is made among the reuse algorithm and the relay technique. Within varies scenarios of users’distributions, abilities of the proposed strategy is tested. Proved by the numeric results and compared to the previous one based on a priority algorithm, the approach realizes a decrease in the possibility of being eavesdropped while keeping almost the same completion rate of requests.Considering the practical requirement of fairness, this paper proposes and optimizes the D2D reuse transmission scheme with artificial noise technique. With allowance of making artificial nose, the technique can be a strong guardian for D2D from eavesdroppers. To solve the problem of unfair selection of jammers, records of previous offering on cooperation is introduced to optimize the selection of nodes playing the jammer role. Relays are also put in to bypass the working load of secure cooperation for the purpose of fair cooperation. With an inevitable price of lower efficiency in transmission and more energy consumption, this paper finally proposes an optimized artificial noise aiding D2D cooperative reuse scheme of acceptable cooperation mode with fairness concerns, guaranteeing the realization of D2D communication and the improvement of anti-eavesdrop ability.