Research On The Application Of LTE And Its ICIC Technology In Urban Rail Transit

Traffic congestion is becoming a major challenge for urban operation and development in China.Urban rail transit is undoubtedly one of the most effective measures to improve urban traffic quality,and vehicle-ground wireless communication system is the core of the whole rail transit operation system.The quality of vehicle-to-ground wireless communication system directly affects the normal operation of rail transit.This thesis studies the application of wireless communication system based on LTE technology in urban rail transit,and designs an inter-cell interference coordination algorithm for the interference problem for inter-cell interference problems.This thesis first analyzes the limitations of the traditional WLAN system in urban rail transit,proposes the wireless communication system framework of rail transit based on LTE technology,and demonstrates its feasibility.Based on the basic architecture of LTE system and the LTE-M specification,the networking scheme is studied,and the same frequency interference is discussed and analyzed.Then the design of interference coordination algorithm,including static algorithm and dynamic function extension,is expounded in detail.The static algorithm includes the determination of user edge or center property and the division of user edge frequency band.Based on the static algorithm,the dynamic algorithm makes the edge band shrink and expand dynamically according to the interactive information between base stations.Finally,the feasibility of the proposed design scheme is verified through the test and result analysis.