Study on Risk Assessment and Factors Ranking of LTE-M Communication System

Abstract To assess the operational safety risk of long-term evolution for metro (LTE-M) communication system more accurately, guide maintenance strategy, improved evidence theory and multi-attribute ideal reality comparative analysis (MAIRCA) approaches are proposed respectively. According to features LTE-M system, evaluation is established. The enhanced structural entropy weight method used count weight. Furthermore, combined with nine-element fuzzy mathematics transform degree membership. Modifying conflict fusion rules solve confidence clashed problem theory. Then get grade assessment result. For purpose forming ranking indicator importance, MAIRCA introduced sort based on three-dimensional. state line as data source in various ways test calculation. results show that effective, compared others, obtained increased by 7.12%. It verified can be applied field urban rail transit because excellent stability result factors reasonable. influencing highest importance is’ equipment failure rate’.