The Study Of Planning Design And Test Methods On Indoor Coverage

With the continuous improvement of technological level, the level of mobile communications are increasing change, replacement. Particularly in the mobile communications business hot spots, population density, harsh electromagnetic environment, coupled with large buildings springing up classes continuing emergence of a seamless network coverage makes it difficult. Radio wave propagation vulnerable structures and topography and other factors, often results in large-scale construction within the signal difficult to meet the requirements of both the existing GSM or WCDMA system, its ability to penetrate than the weak. Especially the 3G system, its signal through If capacity is through. Therefore, the outdoor base station coverage to receive the signal in the room will exist under the ground unstable and the scope of the problem can not be accepted. And a large number of modern buildings as the capacity of the reasons more can not rely on the outdoor base station coverage. If the bottom of large buildings, underground parking, underground shopping areas, mobile signal off, mobile phones and other wireless devices simply can not normal use, the formation of a mobile communication blind spots and shadow areas; in the middle floor, as different from the surrounding base stations signal overlap, ping-pong effect is very easy to produce, mobile switching frequency, and even dropped calls,Seriously affected the normal use of mobile phones; in building high-rise, due to the base station antenna height restrictions, not normally covered, but also blind spots of mobile communications. In addition, in some buildings, while the normal phone call, but because the user density, the base station channel congestion, the phone line difficulties. Therefore, a good indoor coverage solution to meet customer needs, improve the quality of network coverage, has become increasingly important, has become a focus of network optimization. The problems listed above can be used to solve the indoor coverage technology. Thus reasonable indoor coverage network planning and design, network planning to establish clear goals, operators will be the basis for building of the network have a profound impact. Planning objectives of the establishment from the full range of thinking, and more balanced perspective. The focus needs to balance the balance between the four factors: coverage, capacity, quality, cost. The article also clearly a need for indoor coverage planning several aspects of attention, such as identifying development objectives; attention to the initial planning, site survey, system design, frequency planning, parameter planning, indoor distribution system installation wiring and attention to indoor distribution system acceptance. Demand for audit coverage in the text, to be more specific.In addition, full text of this article also demonstrates the distribution system needs to be optimized after the completion of the importance of test items: sweep test, test coverage level, voice quality testing, antenna, signal strength test, elevator testing, signal leakage test, each test carrier output power, the edge of field testing. It also describes in detail the principles of distributed system test.This paper consists of five chapters on indoor coverage planning, design, test methods and detailed analysis, to solve point problem of how to choose, how to design, how to solve installation problems after Ceshi and opened. Relative outdoor network planning, to address indoor coverage, relatively speaking easier, but the outdoor network is a useful complement. Indoor site in outdoor construction site easier, faster, does not exist outside the site from adjacent areas to face the problem of electromagnetic interference environment. And improve the indoor coverage of the macrocell base station can reduce the investment, expand the macrocell base station coverage. In particular, 3G indoor stationUsers to share the power available for each sector, to provide indoor residential capacity in the target buildings to provide seamless coverage, can reduce the load of outdoor macro station, and indoor users to access high-quality service.However, we should clearly see that in the 2G network to the WCDMA evolution, the mobile communication network for indoor coverage and some issues that must be a solution. Indoor signal quality standards to cover the target area and very different. So the next step we need to address the issue of multi-system indoor coverage, pay attention to network design and planning. Realize multi-system indoor coverage (2G/3G/Wlan) is necessary because the current mobile operators in China have large 2G indoor coverage system, which involves the new indoor coverage system owners more headaches coordination, taking into account the needs of cost- ,The need for more indoor coverage for the overall planning system and key issues to consider coexistence interference, device sharing, and related requirements, which passive, active devices can be shared, which must add, to put forward the corresponding device on the common technical requirements, while handling good coverage of different systems when sharing inconsistencies. Second, we must make 3G indoor coverage planning, including a variety of solutions to choose, source selection, the need for DAS and the number of antenna point, repeater and indoor and outdoor use of the same / different frequency choices. In addition, to make 3G indoor coverage of optimization problems, including interference control of indoor and outdoor, indoor and outdoor switching. View of the indoor coverage in the 3G business development in the important position and facing some problems, so I in this paper for the mobile communication network the problem of indoor coverage explained some of my plain view and the design of indoor coverage planning and optimization of understanding。Fushun XX according to the school and the actual situation of a cover design. Including an overview of project site, on-site electromagnetic environment analysis, program design based on indicators of program descriptions and instructions for several aspects of the installation location.In short, the indoor coverage both in 2G or 3G era times, operators are deploying networks to face the process of how the design of rational planning and optimization problems. If a good grasp of the issue to coordinate the relationship with the parties concerned, mobile indoor coverage programs to promote the smooth, seamless wireless networks will be able to sound development.