UPS (uninterrupted power system): UPS system is a common choice of standby power supply for communication base stations, which can provide continuous power supply when the power grid is cut off to ensure the normal operation of communication equipment. The stable operation of mobile communication networks directly depends on the uninterrupted and reliable supply of electricity to base stations. base station (BS), uninterruptible power supply, hybrid power system (HES). For telecom operators, a power outage never means 'service suspended.