Research On Buffer-aided-based Resouce Management Algorithms For Full-duplex Relaying Network

As the rapid development of 5G mobile communication technologies,the users' rate and traffic requirements reach a new level.The bandwidth required of the wireless communication system has increased rapidly,as well as the demand for spectrum resources.Full-duplex relaying can receive and forward data in the same frequency simultaneously so as to realize the multiplication of communication system channel capacity.Full-duplex relaying has become one of the key technologies in the next generation wireless communication network.This thesis focuses on resource management technology based on full-duplex relaying technology.The main research contents are as follows:First of all,this thesis introduces the background and development of the fifth generation of mobile communication network,and introduces the advantages and difficulties of full-duplex relaying,which is the key to 5G development.Then,the thesis comprehensively introduces the key technology of full duplex relaying network,including collaborative communication protocol,the interference elimination technique and resource management technique,the buffer-aided half-duplex and buffer-aided full-duplex network.The QoS(Quality of Service)theory and effective capacity are also be introduced.Secondly,the power allocation algorithm based on the two-way full-duplex relaying network is studied.In this thesis,we consider a two-way buffer-aided full-duplex relaying network model which works in different frequency bands.It combines the three elements of two-way,full-duplex and buffer,and studies the power allocation algorithm which aims at optimizing the effective capacity of the whole system based on the instantaneous channel state information.In the process of solving the objective function,we show that the objective function has quasi-concave properties and a bisection-based joint power allocation algorithm can be adopted to solve this kind of problems.The simulation results show the advantages of the proposed algorithm.Finally,the problem of relay selection in buffer-aided full-duplex relaying network is studied.The thesis establishes two full-duplex relaying selection models for one-source and multi-source.We introduce the difference for relay selection strategy commonly used between our model and the existing models.Then we propose a relay selection algorithm based on the effective capacity.Subsequently,the multi-source model is extended.Compared to the one-source model,the multi-source model has competition problems in sources,due to the high complexity of multi-source model with large number of relay.We also propose a suboptimal relay selection strategy.The difference between the suboptimal strategy and the optimal relay selection strategy is also studied.The simulation results show that the influence of the number of relays,power,self-interference,QoS constraints on the results in one-source model and the influence of power,self-interference,QoS constraints on the results in multi-source model.