D2D通信中資源分配問題的研究
[Abstract]:In recent years, with the popularity of smart phones and the rise of mobile Internet, the traditional cellular network resources are gradually scarce. Using D2D communication technology can make the original communication system gain greater rate and capacity. D2D communication has many advantages as a kind of communication way to support cellular network communication, such as multiplexing frequency band resources can improve frequency band efficiency. Close-distance communication can effectively improve the communication rate. However, there are still some problems in D2D communication, such as interference caused by multiplexing frequency band resources, mode selection, and energy efficiency. Therefore, this paper also carries on the related research to these questions. The main contributions of this paper are as follows: 1. For the allocation of frequency band resources, this paper mainly finds that the algorithm complexity of the allocation method is too large on the basis of the original distributed combinatorial bidding resource allocation method. Therefore, this paper proposes a centralized control method for the allocation of combined bidding resources in which the base station participates in the decision. In this allocation scheme, the base station is directly involved in the decision of competing resources, thus reducing the complexity of iterative algorithm. Finally, through theoretical analysis, the algorithm complexity of centralized control algorithm is lower than that of distributed algorithm. Secondly, the system rate of centralized control algorithm is the same as that of distributed algorithm. 2. For the problem of pattern selection, a large number of literatures show that using Hungarian algorithm can effectively solve the problem of pattern selection. However, the Hungarian algorithm has a great disadvantage, that is, the complexity of the Hungarian algorithm is high. Therefore, a heuristic pattern selection scheme based on network state is proposed in this paper. In this scheme, the states of the network are divided into three states: low load, medium load and high load, and then the corresponding Hungarian algorithm is changed according to the three network states. Finally, the simulation results show that the system speed of the improved Hungarian algorithm is higher than that of the traditional cellular network communication and is close to the optimal mode selection algorithm. 3, for the energy efficiency problem, In this paper, we study the problem of prolonging the service time of D2D communication equipment under the premise of satisfying the D2D communication rate. The existing Nash equilibrium and Pareto optimal methods can deal with this problem, but the algorithm does not consider the frequency band resource allocation problem. So this paper adds the frequency band resource allocation algorithm based on auction mechanism to the original algorithm to ensure the overall system performance. Finally, the simulation results show that the proposed resource allocation and energy efficiency optimization algorithm based on auction mechanism can obtain the time and system speed of the equipment which is close to the existing work.
【學(xué)位授予單位】:南京郵電大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2017
【分類號】:TN929.5
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