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  2. GSM-R - Wikipedia

    en.wikipedia.org/wiki/GSM-R

    GSM-R, Global System for Mobile Communications – Railway or GSM-Railway is an international wireless communications standard for railway communication and applications. A sub-system of European Rail Traffic Management System (ERTMS), it is used for communication between train and railway regulation control centers.

  3. Message sequence chart - Wikipedia

    en.wikipedia.org/wiki/Message_Sequence_Chart

    Since in MSCs the communication behaviour is presented in a very intuitive and transparent manner, particularly in the graphical representation, the MSC language is easy to learn, use and interpret. In connection with other languages it can be used to support methodologies for system specification, design, simulation, testing, and documentation.

  4. Line code - Wikipedia

    en.wikipedia.org/wiki/Line_code

    After line coding, the signal is put through a physical communication channel, either a transmission medium or data storage medium. [3] [4] The most common physical channels are: the line-coded signal can directly be put on a transmission line, in the form of variations of the voltage or current (often using differential signaling).

  5. Single-carrier FDMA - Wikipedia

    en.wikipedia.org/wiki/Single-carrier_FDMA

    Intuitively, the reason lies in the fact that where OFDM transmit symbols directly modulate multiple sub-carriers, SC-FDMA transmit symbols are first processed by an N-point DFT block. [9] In OFDM, as well as SC-FDMA, equalization is achieved on the receiver side, after the DFT calculation, by multiplying each Fourier coefficient by a complex ...

  6. Block diagram - Wikipedia

    en.wikipedia.org/wiki/Block_diagram

    A block diagram is a diagram of a system in which the principal parts or functions are represented by blocks connected by lines that show the relationships of the blocks. [1] They are heavily used in engineering in hardware design , electronic design , software design , and process flow diagrams .

  7. Block (telecommunications) - Wikipedia

    en.wikipedia.org/wiki/Block_(telecommunications)

    A block transfer attempt is a coordinated sequence of user and telecommunication system activities undertaken to effect transfer of an individual block from a source user to a destination user. A block transfer attempt begins when the first bit of the block crosses the functional interface between the source user and the telecommunication system.

  8. Mobile architecture - Wikipedia

    en.wikipedia.org/wiki/Mobile_Architecture

    Mobile architecture allows maintaining this connection whilst during transit. [1] Each day the number of mobile devices is increasing, mobile architecture is the pieces of technology needed to create a rich, connected user experience. Currently, there is a lack of uniform interoperability plans and implementation.

  9. Time-division multiple access - Wikipedia

    en.wikipedia.org/wiki/Time-division_multiple_access

    The mobile transmits at the beginning of the time slot as received from the network. If the mobile is near the base station, the propagation delay is short and the initiation can succeed. If, however, the mobile phone is just less than 35 km from the base station, the delay will mean the mobile's transmission arrives at the end of the time slot.