Reserch On Admission Control In LTE System

The rapid development of personal communication techniques and markets leads to the fact that the demand of data service, such as multimedia message, on-line game, music download and mobile TV, will soon go beyond the ability provided by the wireless network today.Compared with WIFI and WiMAX, the network structure and access protocols of WCDMA/HSDPA/HSUPA are too complex although they have advantages in mobility and QoS aspects, which makes them fall behind in aspects of wireless spectrum efficiency and transmission delay.This paper has the emphasis on the study of the number of user accessed and the percentage of traffic, as well as the satisfaction of the users in different access control schemes.In the first chapter, The paper briefly reviews the development of mobile communications, and has done a brief overview of the LTE system; In the second chapter, it introduces system structure and some key technologies in the LTE system, including the frame structure for LTE system, physical technology such as the SC-FDMA technology, MIMO technologies, HARQ technology, Link Adaptation, introduces some of the radio resource management; In the third chapter, it introduces the LTE dynamic simulation platform in detail, including the main simulation flow and the various functional modules; In the fourth chapter, it highlights some of the relevant LTE admission control, including the admission control principle, admission control classification, admission control scheme, admission control algorithms, admission control, implementation and results analysis. At the same time, it has evaluated the performance of the access control schemes. In the fifth chapter, it sums up the whole research work and gives some work prospects.