Abstract
With the support of GIS spatial analysis technology, based on an in-depth study of the wireless propagation environment of a city, combined with the analysis of project requirements, it proposes to use the SPM model to correct the propagation model parameters, using SPM. The wireless propagation model, and research and analysis of the SPM wireless propagation model correction algorithm, further corrected the parameters of a city's SPM wireless propagation model. On this basis, the propagation loss of several classic propagation models in different environments is compared, and the SPM propagation model suitable for the signal frequency band and propagation environment of this study is selected. The correction of the SPM propagation model is based on the designed correction principle and correction process, that is, the weighted least square method is used to fit and analyze the measured level data to obtain an SPM prediction improvement model with local characteristics, and according to the designed verification link. Evaluation of the correction results shows that the accuracy requirements are met. Based on the corrected SPM prediction model, link loss calculations were performed on the 13 test base stations studied in the experiment, and the effective coverage radius of each base station community was obtained. In combination with GIS technology, model parameters and workers of each base station participated in the electronic map loading of the area Go to the network planning software to get the wireless signal coverage prediction map of each base station. Finally, according to the technical requirements of the TD-LTE system network planning and network optimization engineering, the objectiveness and rationality of the site selection and number of base stations in the area were verified, and specific problems regarding poor coverage and overlapping coverage in the area were proposed.
Highlights
This thesis takes Time Division Long-Term Evolution (TD-LTE) as the research object
TD-LTE is the most used network service, but because the technology is independently developed in China, there is no mature communication network construction experience to learn from, so TD
Li et al J Wireless Com Network (2021) 2021:161 planning is to determine the propagation model of radio wave signal coverage prediction, because the propagation model is suitable to predict the median loss of the signal from transmission to reception
Summary
This thesis takes TD-LTE as the research object. TD-LTE is the most used network service, but because the technology is independently developed in China, there is no mature communication network construction experience to learn from, so TD-LTE wireless network Planning is a challenge. Brand-new methods and means analyze the actual key problems of communication network resource data and realize the function of visual information management using GIS technology in communication network resource management [7, 8] and propose a method using drive test data A model for propagation correction, which can be applied to mobile networks of different standards and standards [9, 10]; according to the existing wireless signal propagation prediction model, using the CW continuous wave test method, by improving the traditional model algorithm and correction process, Prediction of the signal coverage in a certain propagation environment and estimation of the propagation loss value of a certain distance of the signal have obtained good simulation results It provides a strong engineering method for accurate coverage prediction of wireless signals in specific research areas [11,12,13]. It is given that different propagation environments should choose different LTE propagation models [21]; the use of GIS technology to obtain the research area Building height, density and other information, collected a large amount of measured data, the prediction model
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