Research Of Four Network Synergic Indoor For Heilongjiang Mobile's Distribution System

Mobile communication technology and business models are in rapid development,mobile communication data transmission business is growing rapidly,video,streaming media and other business are becoming the main mobile phone business.Statistics show that about 70% of the mobile business is indoors,so the output speed and quality of indoor data is an important factor to evaluate the quality of the mobile network.At present,in the presence are four kinds of network,such as GSM,TD-SCDMA,WLAN and TDD-LTE,namely four kinds of network synergic.The four networks' scope of business situation is different,within a certain time,four nets will be coexistence.Indoor distribution system design research the use of indoor antenna,in the future from the mobile base station signal is distributed evenly,so as to improve the success rate of the mobile communication,improve the quality of communication within buildings.Based on the abo ve research background,this thesis heilongjiang branch of China mobile to indoor distribution system design and implementation.In the first place on the indoor distribution system analysis,the research status at home and abroad clear advantages and disadvantages of the existing technology.Secondly,the concept of indoor distribution system is studied,the classification of indoor distribution system,involved in the indoor distribution system at the core of related technologies,such as system access platform POI,GSM and TD-SCDMA technology are studied,such as the four common indoor distribution system of the currently existing problems are analyzed and expounded.The indoor distribution system and the realization of the plan and design,build different scenarios of the target network scheme,combining with the Heilongjiang university of science and technology,the application example,the design of indoor distribution system and planning,system test and analysis,some of the major technical indicators before and after the transformation were analyzed and compared.Research data show that after modification,the network got a lot of ascension,the overall coverage of the 2G(GSM)signal is good,and the overall signal coverage of 4G(TDD-LTE)signal is greatly improved,and the WLAN signal is relatively stable before and after the transformation,the overall benefit of the user experience is also more satisfied,achieve the desired design goal.