| With the rapid development of mobile communication technology, the mobile communications market is more and more competitive. Faced with this situation, rapid business, reducing operating costs, improving communication quality is the key factors winning in the market competition for the operators, but the focus of these key factors is in the underlying network architecture. A good network planning program can greatly increase the overall capacity of the network. The wireless network planning includes traffic estimates, the base station planning, frequency planning, channel planning, system simulation and optimization, and planning for different business. The base station planning plays an important role in a connecting in network planning, and also is an important part of network planning. The base station planning is directly related to the operator’s network investment income, which accounting for nearly2/3of the total investment. The base station planning has been a hot topic in wireless network planning. Therefore, the base station planning problem has a good theoretical and practical significance.This article is based on the WCDMA system, and takes the WCDMA radio network base station planning problem as the main object of study. WCDMA radio network base station planning objectives are considering the regional characteristics of the environment, business distribution characteristics in covered, and planning for the station site and the related parameters of the base station, wireless network coverage, capacity, cost and quality of balance, and to meet current business needs and adapt to the network for the future development and expansion requirements. The alternative base station is not only the basis of the base station planning, but also the merits of the key points of the actual performance of the wireless network. Therefore, it is necessary for specialized analysis of the alternative method of the base station. The main content is as follows:(1) On the basis of access to a large number of domestic and foreign literature, WCDMA base station planning problem models and algorithms are summarized and analyzed. We also describes WCDMA network system and its basis theory for base station planning, including spread spectrum communication theory, planning objectives, performance indicators;(2) For the alternative base station, we propose two methods based on traditional pre-planning and mathematical models. And we get two sets of options for the base station by setting an example. By contrast, we found:the traditional pre-planning methods, although having a large number of scientific computing process, pay more attention to the artificial experience, and Engineers can artificially control the performance of the entire network and the subsequent development; The method based on mathematical models can get to meet network requirements for the minimum number of base station sites, which can greatly reduce the base station construction costs, but the probability of select unreasonable base station sites is huge,so we add expert verification process and make it more realistic(3) For the network actual coverage requirements, a WCDMA base station programming model is proposed on the basis of the obtained two sets of options for the base station. Genetic Algorithm is used to solve this model. For the number of base stations select from the alternative base station sets, the mathematical modeling method can select less than the traditional pre-planning method, but the latter cover better. So, if the network coverage of the mathematical model method is within the acceptable range of operators, it is used to select the alternative base station sites, because it can effectively reduce costs; if construction costs allow operators hope planning better network coverage, the pre-planning method is better.This research of this paper provided an effective method for wireless communication network base station location optimization problem in real life. |
PDF Full Text Request