The Research Of CDMA2000 1X EV-DO Netword Optimization And Users' Perception

CDMA2000 1x EVDO is one of 3G mainstream standards CDMA2000 improve group, is the evolution of the data transmission capacity version.The carrier with the independent EVDO offer high speed packet data service. By introducing Time Division Multiplexer in the forward link;adaptive modulation and coding; speed control;rate control in the reverse link, Greatly improved CDMA2000 in data Service aspects of transmission capacity,It can achieve a downlink peak rate of 3.1Mbps and uplink peak rate of 1.8Mbps.(1)It introduce of EVDO technology characteristic, the network development trend, network structure,and the functions of important units and interfaces of EVDO system, At the same time, makes a deep analysis of the EVDO critical technology.(2) The research generalizes of process, contents, optimizing idea, steps and methods summary for EVDO network optimization. Among them is mainly studied the EVDO network KPI all kinds of index statistical methods and optimizing idea. Analysis EVDO network optimization for all kinds of typical case.(3) The research level users perception for DO sector, and then rate of simulated users of various business types behavior test, it is concluded that the demand rate of the rate of user expectations satisfy common standard; And by using the average user perception rate and users expect rate, users, the relationship between the ShenGao rule, eventually build out DO sector level users perception evaluation system model.This thesis doing research work has great meaning to the networks optimization,improve work environment and work quality.