Research On Power Allocation Method Based On Heterogeneous Service Transmission

With the increasing innovation of communication technology and the ceaseless exploration of science and technology by human society,5G technology is more advanced than tradi-tional 4G technology in terms of high transmission speed and high coverage performance,which is a major breakthrough in the application of wireless communication technology.5G technology will be a key aspect of the future development of the Internet network,and will have an important impact on the communication industry,emerging industries in the future,and the development of science and technology in various fields.As the trend to connect ev-eryone and everything around the world becomes a reality,there are tons of wireless devices around the world,and every construction produces huge CO₂emissions for the planet.For5G of mobile communication network of the three main application scenarios（enhanced mo-bile bandwidth,large machine class reliable data communication,the ultra low latency data communication）,especially for the implementation scope of greater system capacity,high spectrum efficiency,massive connection and the application requirement of lower latency,green cellular networks communication has become a key core technology of the 5G technol-ogy.Compared with existing orthogonal multiple access systems,power division multiple access technology can meet the access requirements of a large number of users in 5G ap-plication scenarios,so that the total number of users that can be accessed is not limited by the total amount of resources,and can improve the spectrum efficiency of the system.How-ever,because power division multiple access allocates resources to different users through the power domain,the power distribution mode at the transmitting end will directly affect the performance of the whole system.Power division multiple access technology is one of the important research contents in the field of green communication of 5G system.It can not only effectively obtain the optimal power distribution,but also has great advantages in reducing energy consumption.Based on the power division technology,this paper considers the single user,single base station and direct single antenna transmission,and proposes a power distribution scheme for the series and parallel power amplifier in the single user and multi-service scenario.The specific re-search and innovation contents of the two schemes are as follows:1.Based on the basic theory of quality of service（Qo S）,this paper studies a dynamic priority adjustment algorithm based on priority,real-time and accuracy.Firstly,the basic theory of Qo S is introduced,and several important parameters of Qo S are analyzed.Then,accord-ing to the different requirements of different services for Qo S,three indicators of priority,real-time,accuracy are selected to grade the services.Finally,the arrival time of multiple services is subject to Poisson’s arrival,and the process of service arrival,classification and transmission is simulated and analyzed.It is concluded that the classification method based on service priority can improve the reliability of the system.2.Based on the power distribution problem of PDM downlink which to reduce energy con-sumption,the thesis proposes a power distribution scheme based on PDM selective parallel power amplifier.Since PDM does not have the advantage of reducing power consumption for multiple information flows at the same frequency,this paper optimizes PDM based on the parallel connection of power amplifier and its selective turn-off.On the premise of satisfying service Qo S requirements,the problem that PDM does not reduce energy consumption under the same channel gain is solved.Finally,the optimization algorithm of PDM is compared with TDM,and it is found that this algorithm can effectively reduce the energy cost.