Field intensity prediction engine for intelligent multi-network indoor radio signal

Abstract

The invention relates to an intelligent multi-network indoor radio signal field strength prediction engine, which adopts a computer and software program procedure: the parameters of equipments being used are set by users, such as a system base station, a receiving antenna, a cable, an amplifier, a power-divider, a transmitting antenna, and an indoor building wall model; the software simulates the transmission of electromagnetic waves according to the parameters and gives the distribution of indoor field strength so that the users are given an intuitive network planning situation for carrying out network planning design; an intelligent multi-network indoor planning system belongs to a deterministic model and follows the physical theory of the transmission of the electromagnetic waves, therefore, as a mathematic analysis method, the system can accurately give the field strength information of an area being predicted and can also support multiple networks, such as GSM, WCDMA, TD-SCDMA, and the like. The prediction engine has real and intuitive prediction effect drawing, and flexible and convenient use.

Description

technical field [0001] The invention belongs to the measurement of indoor radio signal field strength of a communication network, in particular to an intelligent multi-network indoor radio signal field strength prediction engine. Background technique [0002] With the development of mobile communication services, people transmit a large amount of voice and data in places such as commercial buildings, supermarkets or conference halls, so indoor communication quality is receiving more and more attention. Although the indoor channel has some similarities with the outdoor channel, it has its own characteristics and is very complicated. For example, although the path loss model that changes according to the negative index of distance is suitable for outdoor channels, it is not always true for indoor channels. The research on indoor channels only started in the 1980s. Due to the complexity and variety of indoor channels, some reported models are not universal, and the performance...

AI Technical Summary

Problems solved by technology

These modern buildings are large in scale and high in quality, and most of them are made of reinforced concrete. In addition, the fully enclosed exterior decoration has a particularly severe shielding and attenuation of radio signals, which seriously reduces the quality of calls and makes it difficult to carry out normal communication.

For example, in the environment of low floors of large buildings, underground shopping malls, underground parking lots, etc., the signal received by the base station is very weak, resulting in the failure of normal use of mobile phones, forming blind areas and shadow areas of signal coverage; in the middle floors of large buildings, because mobile phones can Received signals from many different base stations around, causing the base station signals to overlap, resulting in a ping-pong effect, frequent switching of mobile phones, and even dropped calls, which seriously affected the normal use of mobile phones; in the high-rise part of large buildings, due to the height limit , it cannot be covered normally, and it is also a blind area of ​​mobile communication

Especially in the middle and upper floors of some high-rise buildings that are not completely enclosed, the signals entering the room are very messy. There are signals from several nearby base stations, and signals from base stations not far away enter through direct, refraction, reflection, diffraction, etc. Indoors, the indoor receiving signal fluctuates and becomes extremely unstable, and the same-frequency and adjacent-frequency interference is very serious

When the mobile phone is used in this environment, the cell reselection is frequent in the idle state, and the cell is frequently switched during the call, which greatly affects the voice quality and is prone to call drop.

In addition, in some buildings, although the mobile phone can communicate normally, the user density is too high, the channel is very crowded, and it is difficult for the mobile phone to go online

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