The Research Of Comp-Coordinated Scheduling And Coordinated Beamforming In LTE-A System

Along with the continuous development of the mobile terminals and mobile applications, we are moving into the era of mobile Internet. How to meet the requirements of the mobile users for high-speed, low interference communication environment has become an important issue facing the next generation of wireless communication network. For that The3rd Generation Partnership Project (3GPP) has introduced several key technologies such as Coordinated Multi-Point transmission/reception (CoMP). CoMP shall reduce the inter-cell interference and improve the system throughput especially the cell edge user throughput by the cooperation of several different transfer points Located in different geographic positions. This technology has become one of the hot spots of LTE-Advanced Research in recent years.As a general view two main families of coordination methods have emerged for CoMP, Joint Processing (JP) and Coordinated scheduling and beamforming(CS/CB). JP means a coordination in which multiple entities are simultaneously transmitting/receiving to/from UEs located in the coordination area. CS/CB means coordination where each UE is communicating with a single transmission/reception point, but the transmission/reception is made with an exchange of control information among the coordinated entities. Compared with CoMP-JP, the CS/CB system is easier to implement, and also can effectively avoid interference to achieve a good system performance.This thesis mainly study the Coordinated scheduling and beamforming(CS/CB) technique of CoMP. Based on this technique we focus on two main implementations’simulations and improvements. The contributions of this paper as follow:First, CoMP-CS/CB system simulation platform has been built according to the requirement of3GPP standard and the simulation scenario of Technique Specification36.819. The evaluation includes the centralized and distributed CoMP-CS/CB system.Second, according to the high degree of complexity of the explicit feedback centralized CS/CB scheduling process, this thesis proposes a CS/CB scheduling algorithms with distinguishing the first user. And the validity of the algorithm is evaluated by several results and analysis.Third, focusing on the problem of high amount of the uplink feedback of the implicit feedback distributed CS/CB scheduling proposes, the author proposes a distributed Worst Companion Instruction (WCI) scheme based on the feedback users selection. And the validity of the algorithm is evaluated by several results and analysis.