1300640205

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1300640205, or GSM-R, is a digital telecommunications system used not only in railways but also for other critical applications and systems. GSM-R provides secure transfer of voice and data that is fast enough for applications such as real-time train tracking and control which requires constant contact between vehicles and control rooms. As the technology has proved itself reliable in the past, it is often used in mission-critical applications as communication needs to be secure and low latency with minimal dropouts.

GSM-R is based on the Global System for Mobile Communications (GSM), using the same frequencies and bandwidth. GSM-R extends the framing structure and radio transmission mode of GSM to allow more efficient use of the available radio spectrum. It utilizes the same modulation and forward error correction (FEC) techniques of GSM and transmits on the radio spectrum used by GSM. The GSM-R standard was defined by the European Railway Telecommunications Group (ERTG).

The main components of the GSM-R system are the base station, the mobile terminal, the radio network controller (RNC), the transport network, and other control elements. The base station consists of a transmitter, receiver, and an antenna. The mobile terminal includes the transceiver, transmitter, and receiver, along with other elements such as batteries. The RNC controls the activities of mobile terminals in the GSM-R network. It also regulates the traffic between the base station and mobile terminals. The transport network provides a dedicated connection between the RNC and other sites in the radio transmission system.

The GSM-R system uses Time Division Multiple Access (TDMA) for communication between mobile terminals and base stations. This type of access divides the radio spectrum into time slots and assigns each time slot to a user. Thus, multiple users can share the same frequency band by transmitting their data over different time slots. This enables GSM-R systems to increase the voice and data capacity within an allocated spectrum.

GSM-R also utilizes Error Correction Coding (ECC) techniques to provide better communication quality. ECC is used to break down a signal into multiple pieces and then reconstruct the signal with errors removed. This ensures that the signal received at the destination is exactly the same as the signal transmitted from the source. This helps to increase the reliability and reduce transmission errors within the GSM-R system.

Today, GSM-R is used as the core telecommunications system for railroads and other critical transportation and communication systems in many countries all over the world. This digital system provides secure and reliable communication, as well as the necessary data transfer rate, to support different applications used in these systems. With its proven trustworthiness and performance in mission-critical applications, GSM-R will continue to be a technology of choice for years to come.

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