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Mobile communication system based on OFDM and channel switching distribution method

A mobile communication system and channel allocation technology, which is applied in the field of railway mobile communication, can solve the problem that the nature of hard handover cannot be changed, and achieve the effect of improving transmission performance

Inactive Publication Date: 2007-08-22
BEIJING JIAOTONG UNIV
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  • Abstract
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  • Claims
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Problems solved by technology

These measures can improve the handover performance of the GSM-R network to a certain extent, but cannot change the nature of its hard handover

Method used

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  • Mobile communication system based on OFDM and channel switching distribution method
  • Mobile communication system based on OFDM and channel switching distribution method
  • Mobile communication system based on OFDM and channel switching distribution method

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Embodiment Construction

[0039] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0040] In the following, the frequency division duplex (FDD) mode, allocation by time slot (using all subcarriers), and downlink are taken as an example for description.

[0041] As shown in Figure 1, the railway wireless network is a chain coverage along the railway line. The entire service area can be a large network or can be divided into several areas according to geographical location to form multiple subnets. Each subnet contains several cells. There is a certain overlap between the districts. Vehicle mobile station and base station (BTS 1 、BTS 2 ...) The wireless link between the base station control equipment (BSC 0 、BSC 1 、BSC 2 ...) and Mobile Switching Center / Gateway (MSC / GW) access to railway fixed network or other systems. In a subnet, all BTSs use the same downlink transmission carrier frequency f 1 and the same uplink rece...

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Abstract

A mobile communication system based on OFDM is prepared as forming service region by multiple sub-network and forming each sub-network by a numbers of cells, switching-in mobile table with fixed network through radio link with BTS and BSC as well as MSC / GW, using the same downlink carrier frequency and the same uplink carrier frequency synchronous operation by all BTS in sub-network. The method for switching over channel distribution is also disclosed.

Description

technical field [0001] The present invention relates to a chained digital synchronous network based on OFDM modulation technology, channel setting and an OFDM-based mobile communication system and a handover channel allocation method for improving the reliability of information transmission in the handover process by using the system, belonging to railway mobile communication technology field. Background technique [0002] Compared with other special mobile communications for land transportation in my country, the development of railway mobile communications is more advanced in terms of scale and technology. At present, our country is constructing the integrated digital mobile communication GSM-R system for railways. For communication-based train control (CBTC), the GSM-R system is used to provide vehicle-ground wireless two-way communication, which can realize automatic train control (ATC), and then replace the existing signal and train control systems. [0003] As a freq...

Claims

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Application Information

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IPC IPC(8): H04Q7/36H04Q7/38H04B7/04H04W36/18H04B7/02H04L27/26H04W84/02
Inventor 陈霞姚冬萍熊磊
Owner BEIJING JIAOTONG UNIV
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