3G Emulation And Application

This paper first gives a brief back review of the mobile telecommunication,states the process of 2G system shifting to 3G system,introduces both the methods of 3G network planning and its relative software.Then explains the important concepts like revision of transmiting models and traffic model.Process of 3G simulation,uplink and downlink analysis,planning parameters are also concerned.Finally,use one digital map of Canton Mobile(ZhaoQing City)for all the simulations,and do the analysis from the angles of coverage, capacity and cost.As the major part of this paper is WCDMA planning for Zhaoqing,in this part,setting up a transmiting model,selecting an antenna,fixing planning parameters will be first concerned.Then,with the 20m-resolution digital map and the information of the NodeBs,analysis,which includes pathloss perdiction,best server simulation,vector setting up and its analysis,Monte Carlo and QOS simulations,will all be done.With the figures and report we get from the analysis,comparations with the suggested parameters will be done .If the figure doesn't meet the requirement,revisions then will be made to finally achieve the standards.The first generation Mobile Communication systems is simulation system,is based on FDMA.The 2nd Generation is based on voice and data transmitting,it is digital communication,the classic system such as GSM,DAMPS,IS-95 CDMA and JDC.The 3rd generation Communication system can associate voice communication and multimedia communications.The Increment service maybe include picture, music, homepage browsing, video frequency conference and other some information service.3G meant global suitable standard,new service,bigger coverage and more frequency spectra resources,and also more users.GSM network evolution is based on GSM/MAP and GPRS.The network will develop ccording to GSM->HSCSD->GPRS-WCDMA.IS-95 Evolution is based on IS-95A->IS-95B->cdma2000 1X.WCDMA Wireless plan plans two parts of constitutions by the outdoor great honeycomb network planning and the extreme terrain cover,Outside the great honeycomb network mainly completes to the big area physiographic region comprehensive cover,The extreme terrain cover considers the extreme terrain, the service distribution non-uniformity question and the city complex space supplement cover question,realization to outdoor great honeycomb cover and wireless network capacity supplement.ENTERPRISE is Network planning management tool module of AIRCOM Corporation,it is based on Windows 2003/WinXP Professional system and GIS and Relational Database core.A Important concept in Simulation1) Dissemination model revisionBecause experiences disseminates the model dissemination environment and the actual use dissemination environment is not necessarily similar, therefore has the necessity in to be going to construct the WCDMA network the area to carry on the typical environment the radio wave propagation test, and enhances the dissemination forecast using the test data revision dissemination model the accuracy.2) The test basestation selectionChooses in the service area to have the representative as far as possible dissemination environment to the different artificial environment,such as the crowded city, general city, suburb and so on.Periphery can respectively suppose tests the stand station site the selection principle is must enable it to cover the enough many places category of things test stand the antenna to compare in the 150~200m scope obstacle to outdo above 5m.Best has three or three above test stand to each kind of artificial environment to eliminates the position factor as far as possible.3) Determined tests the stand related parameterWith omni directional antenna BTS antenna effective height about 4~30m, Mobile phone antenna height about 12m,Moreover must record tests the stand latitude,longitude and antenna height.The antenna type increases the cable loss and including the directional diagram,Transmitter emissive power, receiver gain whether does have in the human body loss and the vehicle loses.If the use field intensity test station truck does not have in the human body loss and the vehicle loses. Guarantees a test frequency cleanness.4) to electronic map requestThe electronic map called the digitized map, is carries on the dissemination model to revise the essential motion message center to use. The electronic map including the terrain clearance altitude, the thing, the street, the vector building and so on to the radio wave propagation influential geography information, disseminates the important foundation data which the model revises.5) radio wave propagation model revision methoda. Drop invalid data percolationb. Fix test data on the position of actual route because of GPS existence deviation therefore the test data isn't total in testing path at the time of show, so need to carry on a data fixed position to remove geography deviation.c. Considers the street wave guide effect to the test data influence.6) service modelThe service model is in the network planning to a network service demand type and quantity. The WCDMA system support rich service type, the network planning is impossible to each kind of service all to make the analysis but only to take the inspection object by several kind of typical services. To the user service demand estimate is the difficulty very big work, specially to the WCDMA system service demand estimate, how in simply hasn't moved in the experience situation to make a more accurateestimate to the user demand to be significant with the WCDMA network planning quality relations.By the the electronic map and stand informationg athering by Guangdong Provice,I has successively carried on best server, pilot strength, Monte Carlo, QOS and so on a series of simulations,And already compare the supposes target to the obtained result,inspects whether meets the anticipated requirements.Although has the partial regions BTS to be dense and so on the question, but the above target basically achieved.This article studied has followed first the fundamental research, latter practiced the application the research technique. Forms the pre- plan plan, will have the certain reference value to the next Zhaoqing urban district WCDMA wireless network planning and the construction. Believed along with our country mobile communication enterprise development, the 3G network planning from now on will be playing a more vital role.