Wireless coverage enhancement method for vehicle-to-ground communication system in vacuum tube considering fault conditions

Abstract

The invention provides a method for reinforcing wireless coverage of a vehicle-ground communication system in a vacuum tube by considering a fault condition. The method comprises the following steps: a plurality of continuously and seamlessly arranged leakage waveguide sections are adopted as a wireless transmission medium of a vehicle-ground communication system in a vacuum tube, a BBU and a plurality of RRUs are arranged in a cell, the BBUs are connected through optical fibers, the BBUs control the RRUs deployed along a pipeline in a linear mode, and the frequency points of the RRUs in the cell are the same; each RRU is connected to two adjacent sections of leakage waveguides through a power divider, the two ends of one section of leakage waveguide are connected with the two adjacent RRUs to form redundant coverage of the RRUs in a cell, and one section of leakage waveguide at the boundary of each cell is connected with the boundary RRUs of the two adjacent cells to form an inter-cell wireless coverage overlapping region. According to the method provided by the embodiment of the invention, the train can communicate with high reliability without interruption in a vacuum high-speed environment, the handover time is reduced, and the handover success rate is improved.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a method for strengthening wireless coverage of a vehicle-to-ground communication system in a vacuum tube considering fault conditions. Background technique [0002] Since it was proposed in the 18th century, the concept of Evacuated Tube Transportation (ETT) has attracted countless researchers and engineers. Although several key technologies of ETT that have been proposed are still far from being mature and practical, the consensus on all aspects of ETT is in Gradually formed. For example, assuming that the vacuum piping system can be realized, then underground tunnels or above-ground metal pipes can largely isolate extreme weather and the surrounding electromagnetic environment, which may bring many advantages such as high speed, safety, high energy efficiency and environmental protection , so as to meet the growing demand for greater transportation capacity and...

AI Technical Summary

Problems solved by technology

Compared with communication in a stationary state or a low-speed moving state, communication in a high-speed railway environment faces more challenges. The higher the speed of the train, the greater the impact on communication, such as frequent switching, severe Doppler Le frequency shift and penetration loss etc.

Therefore, how to ensure the success rate of switching of high-speed trains in vacuum is facing great challenges.

Images