Research On Transmission Strategy And Power Optimization Of Cellular Full-Duplex Relay Cooperative Multi-cast

Because of its "one-to-many" transmission characteristic,wireless multi-cast technology can simultaneously send data to different users that need the same data,improving the spectrum utilization of mobile communication systems,and is an important transmission technology in 5G and future mobile communications.Compared with traditional multi-cast,future mobile communication multi-cast introduce new technologies such as full-duplex technology,multi-cell cooperation,and massive MIMO.In this paper,the transmission technology and power optimization of a full-duplexing relay cooperative multi-cast are studied by using physical layer transmission technologies such as cooperation technology,precoding technology,and full-duplexing technology.The content is as follows:For the transmission problem of relay cooperative multi-cast in a single-cell scenario,a beamforming strategy and algorithm based on full-duplex relay are proposed.This strategy establishes a model to minimize the power of the base station as the optimization objective.The user's minimum transmission rate requirement is used as a constraint,and the semi-positive definite relaxation algorithm and the Gaussian randomization method are used to optimize the original problem.Simulation experiments show that the multi-cast strategy combined with full-duplex technology effectively improves the transmission performance.Compared with the traditional multi-cast transmission strategy,it has higher utilization of frequency band resource and power.Aiming at the transmission problem of relay cooperative multi-cast in multi-cell scenarios,a beamforming strategy based on full-duplex relay in multi-cell scenarios is proposed.With the increase of the working frequency band,the miniaturization of the cell has become the development trend of future mobile communications.Multi-cell cooperation and large-scale MIMO arrays and other technologies are increasingly of practical significance.In the premise of multi-cell cooperation,relay cooperation,precoding technology,and full-duplex technology becoming mainstream technologies.Combining the above techniques,the strategy uses the minimization of the total power of all cell base stations as the optimization goal,and uses the minimum transmission rate requirement of all cell multi-cast users as a constraint to carry out joint optimization.By using the convex optimization method and the Gaussian randomization method to solve the problem optimally,an optimal transmission strategy in a multi-cell scenario is finally obtained.Finally,the simulation was performed.The simulation results show that the strategy effectively improves the power utilization rate.