Spectrum Allocation Mechanism For Small Cell Network With Dynamic TDD

With the increasingly complex communication environment and the need for mobile users' communication needs,small cell networks have emerged.The small cell network is characterized by low transmission power and convenient base station deployment.Therefore,it is suitable for introducing small cell networks into macro cell base stations.In some communication hot spot areas and signal coverage blind spots,macro cell base station deficiencies can be compensated for,and spectrum efficiency and network capacity can be improved to meet the future.The development needs of mobile communication services and mobile user experience.However,the static spectrum allocation system under the traditional mode makes scarce spectrum resources idle for most of the time,resulting in a large amount of wasted spectrum resources.This inefficient spectrum utilization results in extremely limited spectrum resources that can be used by small cell networks.In this regard,the spectrum allocation method based on auction auction is considered to be an effective method to solve the spectrum resource allocation problem with its less information requirement and good distribution effect.The first part of this paper combines the small-cell network and spectrum auction auction allocation method and proposes a periodic bilateral heterogenous spectrum auction mechanism based on small-cell networks.This mechanism constructs a multiple price greedy spectrum auction algorithm and a payment price mechanism based on decisive quotations.The results show that compared with the traditional VCG auction mechanism,the auction mechanism has advantages in terms of system utility value and spectrum allocation rate.The small-cell network can obtain scarce spectrum resources through this auction mechanism,thereby exerting its characteristics.Since the number of intelligent mobile terminals connected to a small cell network is smaller than that of a macro cell,the dynamic change of the uplink and downlink communication link traffic in the coverage area of the same small cell base station is more significant,and the uplink and downlink communication links between different small cell base stations.There will also be significant differences in business volume.If the semi-static sub-frame configuration in the hard macro cell is copied in the small cell network,the spectrum utilization will be reduced.The second part of this thesis is aimed at this problem.In the small cell network,combining dynamic time division duplex technology,a dynamic sub-frame configuration based on FTP mode is proposed.Based on the consideration of interference between base stations and mobile users,Efficientspectrum resources acquired from macro cell base station auctions are used in smart mobile terminals.We estimate that based on environmental interference,dynamic time-division duplex within different system loads has an adaptability to the traffic of the small-cell network,and compares it with the traditional semi-static time-division duplex technology in terms of SNR,packet throughput,and other performance.Show greater advantages.The research results in this paper can help solve the problem of traffic overload in macro-cellular networks.In addition,it has implications for the optimal design of mobile networks.