Interference Management Technology Research In Dense Small Cells

Along with the popularization of wireless terminal equipment, wireless communications has become the most widely used communications technology in the field of communication and information in recent years. Due to the strong users’ demand for higher data rates and better quality of services, operators seek to explore the higher rate of transmission system with a good performance. At the same time, operators seek continuous improvement on network performance to further enhance the user experience. Mobile communication has been developing rapidly, therefore, the developing course of from1 G to 5G as you can see, broadband, fast and efficient communication system is getting more and more favour of the users. However, due to the transmission characteristics of radio waves, one of the main factors restricting the wireless communication system performance is interference problem. Therefore, it is necessary to conduct the thorough research to the interference problems existing in the wireless network, and put forward feasible solutions.By studying the various methods to improve wireless network performance in recent years, we can find that the solutions to improve wireless network performance are mainly divided into two directions. One direction is using new technology to continuously make improvement of the upper bound of the wireless network capacity, and thus, to further enhance the users communication quality in dense small cells; the other direction is the use of new kinds of traffic models or different assumptions, and then giving the theoretical boundary of the wireless network capacity boundary. This article designs specific solutions to improve wireless network performance through using new technology. By effectively using these new technologies of the physical layer, we propose new solutions to achieve a further improvement in communication quality of cell edge users and further research of interference management techniques in dense small cells.For the problem of improving the cell edge users’ performance, we use new communications technologies(device-to-device). According to different cell edge users as well as with the edge of the area,different data communication interaction process are proposed respectively. For the users in different cell edge, a method based on X2 interface signaling interaction to complete the device-to-device communication in different cells is put forward, aimed at improving the longer transmission waiting time, low data transmission rate, low network coverage problems of the existence of cellular communication. Forthose users within the same cell, this paper provides a method based on a relay device to complete the device-to-device communication in the same cell. By using the D2 D communication relay mode, the device can reduce their transmission power, save the energy of the users’ equipment and improve the system performance.For the interference problem of different cells, by using successive interference cancellation, we propose detailed link scheduling solutions of the wireless network. Through utilizing the available portion of the interference between concurrent links, we design intelligent scheduling scheme to improve the network throughput and to allow more stations to be scheduled. Our simulation results show that the graph method can correctly model the scheduling problem with successive interference cancellation and our proposed greedy method works well. What’s more, the greedy algorithm proposed has a lower computational complexity and is practical in the small cell network. Therefore, successive interference cancellation with intelligent scheduling scheme can effectively improve network performance.