Study On Planning And Optimization Of Indoor Distribution System For High - Rise Buildings

Along with Long Term Evolution(LTE) technology license issued, the LTE technology goes in the commercial areas rapidly in 2014. From the current point of view, LTE network construction has covered villages and towns in outdoor areas, it meets the needs of users basically. However, 90% of users’ data business have occurred in indoor areas. In order to capture the interior markets and improve customers’ satisfaction, operators are building the indoor distribution system of LTE nowadays. On this account they can establish company image preferably and get more users. Even though high-rise buildings bring convenient and efficient life for people, they also bring new challenges in construction of indoor distribution system.In the parking areas and basements of high-rise buildings, telephones can’t work properly because shielding effects are obvious which make network signal extremely weak. In the lower areas of the buildings, mobile users density of accessing network is so large that base station channels become more congested. In the high areas of the buildings, for the reasons of mobile phones are switched frequently between outdoor and indoor, the ping-pong effect is produced. Mobiles access difficultly. In the super high-rise buildings, it can’t be covered due to the limitation of antennas, which leads to island effect. The thesis analyses the existing problems in high-rise buildings. One community of LTE indoor distribution system was planed, designed and optimized combining with the latest network technology. The specific tasks are as follows:(1) A planning of LTE indoor distribution system for the community was completed in this thesis. An indoor distribution system was planed for the community combining with practical project requirements based on design principles and flows.The measures include station selection and station survey. Firstly, signals in the floors,basements and elevators were tested. Secondly, according to testing results, the designed indicators of coverage area, capacity, power and the scale of engineering were established.(2) A design of LTE indoor distribution system was completed for the community. According to the survey results, choosing the appropriate signal source,passive components and construction mode to build indoor distribution system.Compared the field testing results with the design scheme’s simulation results, then analyzing the design scheme’s deficiencies.(3) The optimization measures of existing breakdowns was researched in the engineering construction. There are some major breakdowns including Up-link interference in residential area, weak coverage in high areas, switching frequency,high interference in lower areas and the multipath interference in basements. The breakdowns were optimized according to the optimization methods in high-rise buildings. The processing breakdowns steps including problem description, filed testing, troubleshooting, optimization measures and optimization effects. And summarizing the optimization methods in other projects.