Estimation And Optimization Of Random Acess Performance In TD-LTE System

In modern wireless communication systems,if a user equipment wants to access to the base station,it needs to have a random access procedure.Having advantages of greater capacity,faster transmission rate and lower delay than traditional wireless network,the TD-LTE system design a more complex random access procedure protocol,in order to achieve these advantages.The random access procedure optimization algorithm of the LTE system has a very important significance in the optimization of the whole LTE system.In this paper,the random access process of TD-LTE wireless communication system,and a variety of different optimization objectives algorithm are mainly studied.Main contents include this three aspects:first,random access process protocol in the TD-LTE system,as well as how to the simulate the process,are descried;Second,how to define the performance indicator of random access procedure in LTE system and derive the formula of those performance indicators;Last but not least,the paper propose a optimization of random access process performance algorithm,and supported by major national projects to build a system-level simulation platform to authenticate the algorithm.Simulation results show that the optimization algorithm have better achieved the optimization of the random access performance target in LTE system.The first chapter is about the background information about TD-LTE mobile communications system and a simple description of random access technology;Chapter ? details the random access technology in LTE system,and make a brief introduction to the goal of optimization in this paper,also briefly summarized the status of the previous research work;Chapter III is about a brief introduction to the detail of the optimization algorithm as well as how to authenticate the algorithm;Chapter IV specifically describe the optimization algorithm of random access procedure in LTE system,which includes the structure of the controller in the optimization algorithm,also with the optimal target calculation and optimization algorithm validation;Chapter V,in order to verify the performance of the optimization algorithm,the algorithm is perform in TD-LTE system-level simulation platform to simulate and verify the performance of the algorithm,and draw the appropriate conclusions.