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One-way coverage scheme of wireless communication network for high-speed railway

A wireless communication network and high-speed railway technology, applied in the field of wireless communication network coverage solutions, to reduce complexity and expand the area of ​​the cell

Inactive Publication Date: 2011-07-06
BEIJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the high-speed movement of users will bring huge channel estimation data, so it is necessary to design a reasonable coverage scheme to reduce the complexity of channel estimation

Method used

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  • One-way coverage scheme of wireless communication network for high-speed railway
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  • One-way coverage scheme of wireless communication network for high-speed railway

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Embodiment Construction

[0044] In order to make the technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0045] see figure 1 As shown, the present invention adopts the mode of baseband processing unit (BBU) + radio frequency processing unit (RRU), and the BBU and RRU are built along the high-speed railway to cover in a linear manner. One BBU corresponds to one logical cell, and multiple RRUs are used to cover the logical cell. The coverage of the BBU itself is limited, but the range of the cell is expanded through the role of the RRU.

[0046] see figure 2 As shown, the RRUs in a logical cell adopt unidirectional coverage, that is, the RRUs only transmit signals in one direction, and the transmission directions are consistent.

[0047] The advantages of the one-way coverage scheme are analyzed in detail below by comparing the changes of the Dopp...

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Abstract

The invention discloses a one-way coverage scheme of a wireless communication network for a high-speed railway. A mode combining base band units (BBUs) and radio remote units (RRUs) is adopted; the BBUs and RRUs are arranged along the high-speed railway in a linear coverage manner; one BBU corresponds to a logic cell, is connected with multiple RRUs through optical fibers and covers the logic cell by use of the RRUs; and the RRU in each logic cell adopts one-way coverage, i.e. the RRU transmits signals toward one direction and the transmission direction is consistent. According to the invention, the environmental characteristics of the high-speed railway are taken into full consideration, and the proposed one-way coverage scheme can effectively reduce the influence caused by the Doppler effect during high-speed movement, reduce the workload of the system compensating the Doppler frequency offset, and lower the complexity in channel estimation, thereby providing a guarantee for reliable communication.

Description

technical field [0001] The invention belongs to the technical field of mobile communication, and relates to a wireless communication network coverage scheme for high-speed railways. Specifically, the design of the coverage scheme of the high-speed railway wireless communication network directly affects the performance of the entire network, and it is necessary to fully consider the impact of high-speed movement to provide a guarantee for reliable communication. Background technique [0002] In recent years, my country's high-speed railway has been vigorously developed, and the mileage and speed have reached new heights. At present, the average speed of the national high-speed railway is 200-300km / h. The communication of high-speed railway has the following characteristics: (1) The new type of train compartment is well sealed, the speed is fast, and the signal attenuation is large; (2) The user moves fast and the Doppler effect is obvious; (3) The coverage is linear, mainly ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W16/18H04L25/02
Inventor 武穆清徐春秀郭起霖赵敏张婷婷郝晓芳陈玉焓姜淼
Owner BEIJING UNIV OF POSTS & TELECOMM
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