Abstract :
With the development of economy, the improvement of people's living standard has been increasing and the
construction of buildings is becoming more demanding. These buildings are large in scale and of good quality and have a strong shielding effect on mobile phone signals. In the middle of the large-scale buildings, underground shopping malls, underground parking and other environments, the mobile communication signal is weak hence the phone cannot be used normally and forming a mobile communication blind area and shadow area. In the middle floor, due to the surrounding diff erent base station signal overlap, the ping-pong effect, frequent switching of mobile phones and even dropped calls are seriously aff ecting the normal use of mobile phones. In the building's higher floors,due to the height of the base station antenna, it has abnormal coverage and there is also mobile communication blind spot. In addition, in some buildings, although the phone can answer normal call but the user density, base station channel congestion and mobile phone line is diffi cult. In particular, the network coverage, capacity and quality of mobile communication are the key factors for operators to gain competitive advantage. Network coverage, network capacity and network quality fundamentally refl ects the mobile network service level and is the theme of all mobile network optimization work. The indoor coverage system is produced under this background. According to the relevant statistics in some areas of indoor traffi c in the total traffi c accounted for a higher proportion. Therefore, strengthening the indoor coverage is of great signifi cance to improve the quality of mobile communication.
Keyword :
mobile communication; indoor distribution coverage; system capacity