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Chain covering double-link mobile communication system and wave beam diversity and relay switching method

A mobile communication system, relay handover technology, applied in wireless communication, space transmit diversity, diversity/multi-antenna systems, etc., can solve the problems of applicability and performance that need to be further improved, and achieve improved wireless transmission performance and reliability. Effect

Inactive Publication Date: 2014-07-09
CHINA RAILWAYS CORPORATION +1
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Problems solved by technology

Although the above measures can improve the switching or transmission performance to a certain extent, the applicability and performance in the actual environment of the train need to be further improved because the influence of the two aspects is not considered at the same time.

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  • Chain covering double-link mobile communication system and wave beam diversity and relay switching method
  • Chain covering double-link mobile communication system and wave beam diversity and relay switching method
  • Chain covering double-link mobile communication system and wave beam diversity and relay switching method

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Embodiment Construction

[0030] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0031] like Figure 1-2A chain-like coverage dual-link mobile communication system is shown, including a vehicle-mounted mobile station equipped with two wireless links, and each wireless link has a transceiver and an adaptive beamforming function Antennas can respectively constitute a two-way wireless transmission channel between the vehicle and the ground. Adaptive antennas A1 and A2 are installed outside the roof of the vehicle and are as far apart as possible. During the communication process, they keep forming the best beams at their current positions and connect to the base station that currently provides connections for them. The two transceivers TX1 and TX2 perform synchronization, equalization, demodulation and other processing on the signals received by the adaptive antennas A1 and A2 respectively, and the ...

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Abstract

The invention provides a link covering double-link mobile communication system and a wave beam diversity and relay switching method. The link covering double-link mobile communication system comprises a plurality of cells of a service area, wherein every two adjacent cells are partially overlapped, a base station is arranged inside each cell, a vehicle-mounted mobile station moving along with a vehicle at high speed is communicated with the base stations through a rail mobile communication network achieving link covering along a railway line, the vehicle-mounted mobile station comprises a combiner, a front wireless link and a rear wireless link, the front wireless link and the rear wireless link are arranged on the combiner and located at the two ends of a train, diversity is conducted on data received by the front wireless link and the rear wireless link, and then the data are transmitted to a service function unit. The system uses the double-link vehicle-mounted mobile station with a self-adaption antenna and a corresponding wave beam diversity and relay switching scheme, a relay switching process belongs to 'first connection and then interrupt' soft switching, and cell-crossing relay switching reliability is enhanced.

Description

technical field [0001] The invention relates to the technical field of railway mobile communication, in particular to a chain coverage dual-link mobile communication system and a beam diversity and relay switching method. Background technique [0002] China's train control system (CTCS) provides highly reliable train-ground two-way wireless communication through the railway mobile communication system. At present, my country's railways use the integrated digital mobile communication GSM-R system, and the development direction is to evolve to railway mobile based on 3GPP. Communication system (LTE-R). [0003] Regardless of the above-mentioned GSM-R or LTE-R network, due to the limitations of the established standard wireless transmission technology and the requirements of system interference management, adjacent cells will be configured with different radio frequency resources, so handover is implemented in a traditional way Hard handover, that is, during the handover execut...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W36/08H04W36/18H04B7/04
Inventor 陈霞姚冬萍熊磊
Owner CHINA RAILWAYS CORPORATION
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