Usually, normal communication cannot be achieved inside buildings due to the reasons below: The radio wave is greatly attenuated during the transmission by screening, absorbing, and complex structure of the buildings, hence some weak spots or even blind spots inside the buildings appear; The radio frequency jamming often occurs in high-rise space and unstable signals in the service cells frequently cause ‘Ping Pong Effect’…

Blocked by the surrounding buildings, the wireless network signals in low stories and gardens are very weak; ‘Ping Pong Effect’ and ‘Island Effect’ often occur in medium or high stories; Elevators and basements are absolute blind spots. Thus low percentage of district coverage and high disconnection rate have already been prevalent phenomenon in the network coverage for residential districts…

Stadiums and Exhibition Centers always reflect the grade and level of a city, and their excellent interior wireless network signals thus play a significant role in enhancing the operator’s public image. But, because most interior signals are blocked by the surrounding buildings and the stadiums/exhibition centers themselves, some interior parts usually turn into weak spots where the speech quality and network becomes worse…

Suburban and rural areas are usually weak spots or even blind spots because they are far away from the BS and can be easily influenced by some special geographical positions. Besides, it will cost a lot and take a long time to build a new BS to fulfill the coverage. It is also a kind of waste with such low utilization of the BS. So the application of repeater system then shows its unique advantages when facing such cases.