Analysis of Static Partial Carrier Components Assignment in LTE Systems

Large multimedia files (such as high definition audio, video, images, etc.) are accessed by an enormous number of mobile users over the Internet. Therefore, the bandwidth demand for mobile Internet access is increasing exponentially. To answer users’ demand, carrier aggregation is proposed in LTE systems. In carrier aggregation, the best available one or more carrier components of each band must be assigned as primary and secondary carrier components to each user for efficient services. The previous works have significantly improved the performance of LTE systems by using efficient carrier components assignment methods. The previous works, however, have two limitations. Firstly, overall system performance is analyzed in order to evaluate methods by ignoring systems behaviors such as packet drops and delay metrics during the time of assignment. Secondly, it is not investigated whether joint or partial secondary carrier components assignment show better performance. Therefore, in this report, packet drops and delay which are experienced by users during assignment process are investigated for two wellknown carrier components assignment methods, Least Load and Random, and joint and partial secondary carrier components assignment is compared. Results prove that the partial technique increases efficiency of resource usage and performance of Least Load and Random carrier components assignment methods in LTE systems. Our analysis will help service providers build efficient carrier component assignment methods in LTE systems by considering utilization, throughput, and delay.