Abstract:
The introduction of D2D relay technology in traditional cellular communication can not only effectively improve the utilization of spectrum resources, but also effectively enhance the user's access experience. To solve the problem of D2D relay user access, an optimal D2D relay user access algorithm based on energy efficiency is proposed. Firstly, the set of optimal relay locations is determined and the feasible range of relay is calculated. Then the energy efficiency in relay mode and direct mode is calculated according to the energy efficiency formula. Finally, the high energy efficiency mode is selected for user access.The high transmission rate will be selected when the energy efficiency of the two modes is the same. The experimental results show that the proposed algorithm has lower complexity and improves the user's access volume effectively.