Engineering Design And Implementation Of Indoor Distribution Systems

In recent years, with the unceasingly expansion of operators’ network scale, the overall coverage of wirelessnetwork has reached a certain level, and the users are having a growingly high expectation for networks. Underthese circumstances, it seems imperative that the coverage levels of indoor places should be improved and thenthe quality of telephonic voice connection will be bettered accordingly since the coverage levels of indoor placesand the quality of telephonic voice connection are important indicators to see if a network works well or not. Aserious phone call signal screening, however, always happens in indoor places because of the closure andcomplexity of a building’s structure. Therefore, the construction of indoor-distribution system became alloperators’ top priority because it can improve the quality of indoor network. Construction of indoor distributionsystem not only can meet the needs of communications market and provide users with high-quality mobilecommunications services, but also can sharpen the competitive edge of the mobile market and increase thecomprehensive benefits of mobile companies.After analysis on the current situation about wireless networks, it is obvious that modern buildings, which areshaped with steel reinforcing bars and cement and covered with fully closed exterior decoration, act as a hugebarrier to screen much of mobile signals, making telephonic quality of voice connection badly hurt. Furthermore,there’s ping-pang effect in the upper part of a building and co-channel and adjacent channel interference problemsas well. Furthermore, a high density of users brings channel congestion and difficulty in logging onto the internet.With all these consideration, a method: to build indoor distribution system is proposed here. And the technicalstandard of indoor distribution system has been put forward, which includes the coverage areas of indoordistribution system, the principles of system structure and other standards concerned. In the following part, adesign scheme of building indoor distribution system in Suzhou has been introduced. Solutions and relatedconstruction standards aimed at the particular environment in Suzhou have been proposed as well. Moreover,specifications of uplink transmission schemes, power supply requirements and supporting plans, electromagneticcompatibility and electromagnetic protection have also been stated. In the last part, the building A ofSuZhouChangShuShiMaoShares office has been employed as an engineering practice to testify the feasibility ofindoor distribution system. Detailed statements have been made about the exploration in the early stage, analysison the existing network, the proposed layout, scheme design, installation, commissioning and integration on site.The processes of design and construction of indoor distribution system have been elaborated and the wholeengineering practice has been finally verified through field testing and network statistics.After the construction of indoor distribution system, the quality indicators of network in the building A ofSuZhouChangShuShiMaoShares office has been remarkably improved and rating of customer satisfaction has been increased. The capacity of voice traffic of the whole system has grown sharply, which has eased the pressureon adjacent base stations and the outcome of network optimization turned out to be desirable.