A Modeling Method for Wireless Communication Channels in High-Speed Railway Tunnels
A channel modeling and wireless communication technology, applied in wireless communication, transmission monitoring, electrical components, etc., can solve the problems of lack of theoretical basis, increase the cost of wireless communication network and maintenance cost, etc., and achieve the effect of reducing cost and maintenance cost
Active Publication Date: 2020-07-31
CHINA RAILWAY SHANGHAI DESIGN INST GRP
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Problems solved by technology
[0003] Therefore, due to the lack of necessary theoretical basis for the construction of wireless networks in high-speed railway tunnels at this stage; at this stage, the way of arranging redundant equipment is usually used to ensure the quality of network communication; this redundant arrangement will greatly increase the wireless communication network. The cost and maintenance cost; therefore, it is necessary to invent a means of testing the wireless signal transmission characteristics in the high-speed rail tunnel in order to reduce the equipment redundancy of the wireless communication network
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[0029] Example: such as figure 1 As shown, this embodiment specifically relates to a high-speed railway tunnel wireless communication channel modeling method, the high-speed railway tunnel wireless communication channel modeling method includes the following steps:
[0030] 1) Establish a three-dimensional model of the railway tunnel 1; select the installation positions of the transmitting antenna 2 and the receiving antenna 3 in the three-dimensional model.
[0031] 2) Use the ray tracing method to calculate the transmission process of the electromagnetic wave from the transmitting antenna 2 to the receiving antenna 3; the calculation process includes the following steps:
[0032] 2.1) Divide the spherical wave sent by the transmitting antenna 2 into several ray tubes 4; in the division process, first construct an iso-icosahedron (its surface is composed of 20 identical equilateral triangles), and then divide each triangle side into In n equal parts, divide the triangle into...
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The invention discloses a method for modeling a wireless communication channel of a high-speed railway tunnel. The method for modeling the wireless communication channel of the high-speed railway tunnel comprises the following steps: establishing a three-dimensional model of the railway tunnel; selecting installation positions for a transmitting antenna and a receiving antenna in the three-dimensional model; and calculating a transmission process of an electromagnetic wave from the transmitting antenna to the receiving antenna using a ray tracing method. The method has the following advantages: by modeling and simulating the wireless communication channel in the railway tunnel, a tester can obtain transmission characteristics of a radio wave in the railway tunnel; and according to the transmission characteristics of the radio wave, a designer can optimize the number and the layout density of wireless APs in the railway tunnel; and thus, the cost and the maintenance cost of the wireless communication network are effectively reduced.
Description
technical field [0001] The invention belongs to the field of wireless communication, and in particular relates to a modeling method for a wireless communication channel of a high-speed railway tunnel. Background technique [0002] As my country's urban population continues to increase and the urbanization process enters a new stage of development, the research on urban rail transit including light rail and subway is also increasing day by day. The wireless communication network is also becoming more and more important as a supporting setting for rail transit. However, the current GSM-R system design in the prior art mainly uses the Okumuram-Hata free-space wireless transmission model based on public mobile communication, which is not suitable for wireless communication in tunnel environments. Signal transmission. The railway tunnel environment has its particularity and complexity. During the propagation process, the wireless signal forms multiple path signal components to r...
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IPC IPC(8): H04B17/391H04W16/22H04W24/06
CPCH04B17/3912H04W16/22H04W24/06
Inventor 刘玺刘建红刘璠张瑾郑国莘朱德荣石小忠柏锋
Owner CHINA RAILWAY SHANGHAI DESIGN INST GRP