Ray tracing transmission model-based indoor three dimensional space wireless signal predicting method

Abstract

The invention relates to a ray tracing transmission model-based indoor three dimensional space wireless signal predicting method, comprising the step of predicting floor by floor by adopting a floor-by-floor modeling mode when a building is modeled, wherein the configuration of each floor is similar, the ray tracing algorithm is simplified as the antenna is mapped onto each floor in a floor-by-floor mode and computing is performed at the corresponding floor; and in addition, the antenna has a certain coverage range, and calculation is performed in a corresponding range according to coverage range in the horizontal direction and the influencing floor number in the vertical direction of the antenna. According to the invention, the simplified ray tracing transmission model is provided, the loss parameter data base of the wireless transmission of the building material is introduced, the loss of the rays passing an obstacle does not need to be calculated according to the electromagnetic characteristics of the building material, and data in the loss parameter data base of the wireless transmission of the building material is directly read for calculation, thus further reducing calculation amount, and saving time and required memory.

Description

technical field [0001] The invention relates to an indoor three-dimensional spatial wireless signal prediction method based on a ray tracing propagation model, and belongs to the technical field of electric wave propagation prediction in the communication field. Background technique [0002] In the 2G era, indoor coverage is mainly provided by adding outdoor base stations. This method will become more and more difficult to provide high-quality indoor services and coverage in 3G / B3G / 4G / B4G networks, because services such as high-speed data require better wireless channels, and only using outdoor base stations for indoor services does not Possibility to achieve good indoor effect. In recent years, with the development of 3G, 3.5G mobile communication networks and WLAN, the planning and optimization of indoor wireless communication networks has received extensive attention, such as in more and more large and medium-sized buildings, stadiums, entertainment and shopping places, ...

AI Technical Summary

Problems solved by technology

The ray tracing propagation model is a deterministic model. When the ray tracing propagation model predicts indoor scenes, it needs to predict the propagation characteristics of the signal in the building according to the specific structure of the indoor building. Therefore, the prediction result is accurate, but the calculation is large

The multi-wall model is an empirical model. It estimates the field strength at the receiving location according to the number of walls that need to penetrate from the transmitting point to the receiving point and the penetration loss of each wall. This method has a small amount of calculation, but due to the neglect of Reflection, refraction and other multipath effects from the transmitting point to the receiving point, so the prediction results are not accurate enough

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