D2D能量與能效技術(shù)研究
[Abstract]:In recent years, with the increasing energy consumption of mobile communication and the continuous shortage of spectrum resources, D2D (Device-to-Device) communication has attracted more and more attention due to its characteristics of increasing spectrum efficiency, reducing energy consumption and increasing system energy efficiency. But because the appearance time is relatively short, the D2D technology research still has a lot to perfect the aspect. In this paper, the advantages of D2D technology to reduce user power consumption and improve system energy efficiency are studied. In this paper, the D2D technology is introduced briefly, and the background of the research is analyzed. It is pointed out that the energy efficiency research is becoming more and more hot with the energy consumption problem becoming more and more prominent. Then, the energy efficiency performance of D2D in orthogonal, non-orthogonal and cellular modes is analyzed. Based on the quasi-concave property of energy efficiency function and Nash equilibrium theory in game theory, the energy efficiency performance of single-cell and single-D2D users is analyzed. The power consumption of D2D communication is analyzed at different distances. In the scenario of multi-cell users and multi-D2D users, this paper analyzes the method of combining spectrum resource allocation to solve the optimal transmission power of users. From the point of view of a single D2D user, a convex optimization method is used to optimize the transmit power of D2D users with the same frequency. Both methods enable the system to gain energy efficiency. Secondly, on the premise of mitigating interference to cellular users, this paper uses Lagrangian method to reduce user power consumption, and analyzes the joint allocation of power and resources, as well as the allocation of power and resources. An improved bidding algorithm is proposed to optimize the working time from the point of view of a single D2D user. After limiting the rate of cellular users and D2D users, the transmit power of users is optimized from the perspective of whole user and single user, respectively. The simulation results show that the performance of the improved method is close to that of the whole optimization method, and the computational complexity is relatively small. Finally, D2D users are divided into different clusters by using the properties of D2D, which is fast in short distance and consumes less transmit power. The base station sends the data to a D2D user in the cluster and forwards the data to other D2D users in the same cluster. This method can significantly reduce user energy consumption. On this basis, the fairness principle of multiple clusters is studied, and the min-max method is used to avoid the single user consuming too much power, so that the D2D users in each cluster can forward the data from the base station more evenly. At the same time, the aim of optimizing energy and fairness is achieved. After considering fairness, although the power consumed by the system will increase, the problem of single user consuming too much power is avoided.
【學(xué)位授予單位】:電子科技大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2014
【分類號(hào)】:TN929.5
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