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4.8kb/s data service transmission method based on IP (Internet Protocol) GSM-R (Global System for Mobile Communications-Railway) network

A technology for GSM-R and data services, which is applied in the fields of link quality-based transmission modification, digital transmission system, network traffic/resource management, etc. Improve reliability, solve delay and bit errors, and reduce the effect of data transmission delay

Active Publication Date: 2015-07-22
CHINA RAILWAYS CORPORATION +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The shortcoming of a traditional GSM-R4.8kbit / s data service rate adaptation process using the Abis interface based on the IP transmission mode in the above-mentioned prior art is: taking into account the requirements for interconnection between network elements, it is necessary to carry out in the MSC equipment RTP conversion, and RAA, RA2 code rate conversion, these RTP conversions, and RAA, RA2 code rate conversion have the delay loss of code rate conversion, which also makes the CTCS-3 railway safety data transmission process have bit errors on the Abis interface produce possible

Method used

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  • 4.8kb/s data service transmission method based on IP (Internet Protocol) GSM-R (Global System for Mobile Communications-Railway) network
  • 4.8kb/s data service transmission method based on IP (Internet Protocol) GSM-R (Global System for Mobile Communications-Railway) network
  • 4.8kb/s data service transmission method based on IP (Internet Protocol) GSM-R (Global System for Mobile Communications-Railway) network

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Embodiment Construction

[0033] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0034] Those skilled in the art will understand that unless otherwise stated, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the word "comprising" used in the description of the present invention refers to the presence of said features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, Integers, steps, operations, elements, components, and / or groups thereof. It will be understoo...

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Abstract

The embodiment of the invention provides a 4.8kb / s data service transmission method based on an IP (Internet Protocol) GSM-R (Global System for Mobile Communications-Railway) network. The method mainly comprises the following steps: a BTS (Base Transceiver Station) receives a data frame sent from an air interface by a vehicle-mounted terminal, and the data frame is identified to be a 4.8kbit / s data frame; the BTS carries out speed conversion processing on a 4.8kbit / s data business frame to obtain a 64kb / s standard data frame; the BTS sends the 64kb / s standard data frame to BSC (Base Station Controller) equipment through an IP Abis interface. According to the 4.8kb / s data service transmission method, the Abis interface based on IP transmission adopts a transmission speed of 64kb / s and an RTP frame packaged with the 64kb / s standard data frame is directly sent to the BSC equipment, so that a speed conversion process of TRAU including RAA, RA2 code rate conversion and the like is omitted; the BSC equipment can directly transmit to train control server equipment including MSC and the like at the speed of 64kb / s, so that the end-to-end data transmission delaying is greatly reduced, the data transmission reliability is improved, and the CTCS-3 railway safety data transmission reliability is improved.

Description

technical field [0001] The invention relates to the technical field of train operation control, in particular to a 4.8kb / s data service transmission method based on an IP-based GSM-R network. Background technique [0002] China Train Operation Control System Level 3 (hereinafter referred to as CTCS-3) train control system is the core safety system of domestic high-speed railways. As a part of the train control system, the GSM-R network (Global System for Mobile Communication for Railway) carries the transmission of train control information and provides a two-way information exchange channel for on-board equipment and wireless block centers. The on-board equipment receives information such as driving permit, temporary speed limit and line parameters issued by the RBC through the GSM-R network; the RBC receives the train dynamic information (such as train speed, position, etc.) transmitted by the on-board equipment through the GSM-R network. [0003] In the public network, c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04W28/06
CPCH04L1/0002H04L1/0013H04W28/06H04W28/065
Inventor 丁建文钟章队蒋文怡孙斌
Owner CHINA RAILWAYS CORPORATION
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