Overview of mobile cellular network positioning technology
Mobile cellular network positioning is a location method with high precision,low time delay,an-ti-interference,and no need to change the cellular communication standards and infrastructure construction,which is used in situations where satellite signals are blocked or locating base stations cannot be quickly de-ployed.This article first introduces the changes in the 3GPP's requirements for mobile communication posi-tioning indicators,which are reflected in the expansion of coverage,improvement of positioning accuracy and real-time performance,and increase in functional entities.Secondly,it elaborates on the evolution process,performance,advantages,and disadvantages of mainstream positioning technologies in 4G LTE and 5G NR.In 4G,positioning technologies based on signal strength,downlink TOA/TDOA estimation,and LTE-MR are discussed;in 5G,positioning technologies based on TOA estimation using reference sig-nals,fingerprint matching,and DO A are discussed.Subsequently,key issues such as clock synchroniza-tion,source correlation,real-time positioning,indoor/outdoor handover,and base station location accuracy in mobile communication positioning technology are discussed in detail.Finally,the development trends of 6G mobile communication positioning technology are explored.
mobile communicationnavigation positioningnetwork positioning4G5G
万方数据
维普
