GSM Overview Quiz
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Questions and Answers

How is the size of a cell in a cellular system determined?

  • By the operator's coverage policy
  • By the transmitter's power (correct)
  • By the number of mobile devices in the area
  • By the distance from the nearest cell tower

    • What was the primary purpose of developing GSM?

  • To develop a universal language translation system
  • To establish a global network for internet connectivity
  • To design a system compatible with cable television services
  • To create a common European mobile telephone standard (correct)

    • What is the concept behind cellular systems?

  • Using high power transmitters to cover large geographic areas
  • Efficient reuse of frequencies using low power transmitters (correct)
  • Utilizing satellite communication for global coverage
  • Maximizing the range of frequencies for long-distance communication

    • How are radio channels distributed in a cellular mobile radio system?

    <p>Distributed over a group of cells and repeated in all covering areas</p> Signup and view all the answers

    What happens if transmitters used in cellular systems are very powerful?

    <p>Frequencies cannot be reused for long distances</p> Signup and view all the answers

    Why was GSM rapidly accepted worldwide?

    <p>It was designed to be compatible with ISDN services</p> Signup and view all the answers

    What is a key condition for the proper functioning of a cellular system?

    <p>Limiting the power level of transmitters in each cell</p> Signup and view all the answers

    Why must the distance between cells using the same frequency be sufficient?

    <p>To avoid interference</p> Signup and view all the answers

    What is the purpose of clustering cells into clusters?

    <p>To group cells for repeated continuous coverage</p> Signup and view all the answers

    What is the significance of the number of cells in each cluster?

    <p>It directly affects the capacity of each cell</p> Signup and view all the answers

    What is the main purpose of using micro cells in densely populated areas?

    <p>To reduce the interference with neighboring cells</p> Signup and view all the answers

    Why are selective cells used in some cases?

    <p>To define a cell with a full coverage of 360 degrees</p> Signup and view all the answers

    What does frequency reuse aim to achieve in a cellular system?

    <p>Reduce interference and increase capacity</p> Signup and view all the answers

    Why must neighboring cells not share the same channels?

    <p>To reduce interference and increase capacity</p> Signup and view all the answers

    What is a significant factor in determining the capacity of each cell?

    <p>The number of available channels per cell</p> Signup and view all the answers

    Why are receiver filters important in maintaining communication links within the cellular network?

    <p>To reduce interference and increase capacity</p> Signup and view all the answers

    In a cellular system, what does a cell correspond to?

    <p>The geographic area covered by a single transmitter or a small group of transmitters</p> Signup and view all the answers

    What is the purpose of using low power transmitters in a cellular system?

    <p>To enable efficient reuse of frequencies</p> Signup and view all the answers

    What is the significance of the distribution of the frequency band allocated to a cellular mobile radio system?

    <p>It allows for the reuse of radio channels in different cells</p> Signup and view all the answers

    What is the primary factor in determining the size of a cell in a cellular system?

    <p>The power of the transmitter</p> Signup and view all the answers

    Why are very powerful transmitters not used in cellular systems?

    <p>They limit the efficient reuse of frequencies</p> Signup and view all the answers

    What is the concept behind the use of cells in a cellular system?

    <p>Efficiently reusing frequencies through small coverage areas</p> Signup and view all the answers

    What is the primary purpose of clustering cells into clusters?

    <p>To reduce the interference between neighboring clusters</p> Signup and view all the answers

    Why are micro cells used in densely populated areas?

    <p>To increase the number of available channels in each cell</p> Signup and view all the answers

    What does frequency reuse aim to achieve in a cellular system?

    <p>To reduce the interference between neighboring cells</p> Signup and view all the answers

    Why are receiver filters important in maintaining communication links within the cellular network?

    <p>To prevent interference from affecting signal quality</p> Signup and view all the answers

    What is the significance of the number of cells in each cluster?

    <p>To increase the capacity of each cell</p> Signup and view all the answers

    What must be verified for a cellular system to work properly?

    <p>The distance between cells using the same frequency must be minimized</p> Signup and view all the answers

    Why are macro cells used in remote and sparsely populated areas?

    <p>To maintain a distance between transmitters in neighboring cells</p> Signup and view all the answers

    What is the main purpose of using selective cells?

    <p>To cover specific directional areas</p> Signup and view all the answers

    In what scenarios are micro cells used?

    <p>In densely populated areas</p> Signup and view all the answers

    Why do neighboring cells need to avoid sharing the same channels?

    <p>To maintain communication links within the cellular network</p> Signup and view all the answers

    Study Notes

    Cellular System Basics

    • A cellular system is a network of geographic cells, each served by a fixed location transceiver, known as a cell site or base station.
    • The concept behind cellular systems is to provide a network of low-power transmitters to serve a specific geographic area, allowing for efficient use of frequencies.

    Cell Size Determination

    • The size of a cell in a cellular system is determined by the primary factor of the distance a signal can travel before becoming too weak.
    • The power of the transmitter, terrain, and environment also play a role in determining the size of a cell.

    Frequency Reuse

    • Frequency reuse aims to achieve efficient use of frequencies by reusing frequencies in different cells, allowing for a large number of simultaneous conversations.
    • Neighboring cells must not share the same channels to avoid interference.

    Cell Distribution and Clustering

    • Radio channels are distributed in a cellular mobile radio system by allocating a set of frequencies to a cluster of cells, which are then reused in different clusters.
    • Clustering cells into clusters allows for efficient use of frequencies, and the number of cells in each cluster is significant in determining the capacity of the system.
    • The purpose of clustering cells is to enable frequency reuse, increasing the capacity of the system.

    Cell Types

    • Macro cells are used in remote and sparsely populated areas, while micro cells are used in densely populated areas to increase capacity.
    • Selective cells are used in some cases to provide additional coverage and capacity.

    Importance of Transmitter Power

    • Using low-power transmitters in a cellular system is important to prevent interference between cells and to allow for efficient use of frequencies.
    • Very powerful transmitters are not used in cellular systems because they would cause interference and reduce the capacity of the system.

    GSM Development

    • GSM (Global System for Mobile Communications) was developed to provide a unified standard for mobile communication, allowing for roaming and international communication.

    Key Conditions for Proper Functioning

    • A key condition for the proper functioning of a cellular system is that the distance between cells using the same frequency must be sufficient to prevent interference.
    • Receiver filters are important in maintaining communication links within the cellular network by filtering out unwanted signals.
    • Verification of the system's design and implementation is crucial for a cellular system to work properly.

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    Description

    Test your knowledge about the Global System for Mobile communications with this quiz. Learn about the development, standards, and compatibility with ISDN services.

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