Remote micro-power access system and method for mobile communication signal elevator coverage

Abstract

The present invention relates to a remote micro-power access system and method for elevator coverage of mobile communication signals. The system includes at least one near-end unit, N coaxial cables and N remote units. The base station communicates with the near-end unit through a feeder cable. The end units are connected, and the near-end units are respectively connected to N remote units through N coaxial cables, and the remote units are installed on the top of the elevator, and the near-end units are installed at the place where there is a base station signal source, and near the elevator shaft; The remote unit has a built-in transmitting antenna and a receiving antenna, and the remote unit can complete DC power extraction and DC / DC conversion and supply power to each active device of the remote unit, and complete the amplification and communication of the uplink and downlink signals of the mobile communication signal. Elevator signal coverage function; the near-end unit completes the power equalization function of changing the mobile communication signal from one channel to multiple channels, and completes the function of feeding DC power to each branch circuit. The invention can effectively solve the elevator coverage problem, has simple engineering construction and low cost, and is very suitable for large-scale popularization.

Description

technical field [0001] The invention relates to a mobile communication signal coverage system, in particular to a remote micro-power access system and method for mobile communication signal elevator coverage. Background technique [0002] With the rapid development of urban construction and the shortage of urban land, there are more and more high-rise office buildings and high-rise residential quarters, and mobile phones are used more and more frequently in important areas such as basements, elevators, and rooms in the buildings. However, in basements, elevators and other places, the mobile phone signal is quite weak, and in most cases it is a signal blind area, which cannot meet normal communication. And these places also have high traffic demand, so the wireless signals in these places must meet the requirements of deep coverage. [0003] The in-depth coverage of the above-mentioned places is of certain importance. In addition to solving the problem of weak mobile phone s...

AI Technical Summary

Problems solved by technology

[0006] (1) The elevator is generally located in the center of the building, and the signal is blocked seriously;

[0007] (2) The elevator shaft is narrow and long, which has a tunnel effect, resulting in accelerated loss of wireless signals;

[0008] (3) The elevator is separated by solid reinforced concrete, and it is difficult for outdoor signals to cover the entire shaft;

[0011] (1) Yagi antenna coverage: 2G and 3G signals cannot be connected at the same time; the signal strength changes greatly when the height of the elevator car changes, and the signal is unstable

[0012] (2) Covering with leaking cables: the construction of the elevator shaft is more difficult

In addition, since the linear loss has a great influence on the signal strength of the first and last sections of the feeder, the coupling loss leads to uneven signal distribution

[0013] (3) Using flat-panel antennas for coverage: there is shaft switching; usually a large number of flat-panel antennas are used, and the signal quality is unstable; construction also has certain difficulties

[0014] (4) The safety level of the elevator is relatively high, and the construction of the elevator is more difficult, such as engineering construction, installation of antennas, power extraction, etc.

There are great difficulties in wireless coverage such as limited equipment installation space, wiring, installation coordination difficulties, power supply selection problems and supporting engineering troubles.

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