LTE-TDD and LTE-FDD Technology
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Questions and Answers

What is LTE (Long-Term Evolution)?

  • A standard for wired communication for mobile devices
  • A standard for satellite communication for mobile devices
  • A standard for NFC (Near Field Communication) technology
  • A standard for wireless broadband communication for mobile devices (correct)

    • Which organization developed the LTE standard?

  • IETF (Internet Engineering Task Force)
  • WiMAX Forum
  • IEEE (Institute of Electrical and Electronics Engineers)
  • 3GPP (3rd Generation Partnership Project) (correct)

    • What is the upgrade path for carriers with both GSM/UMTS networks and CDMA2000 networks?

  • WiMAX
  • UMTS/HSPA
  • NFC (Near Field Communication) technology
  • LTE (correct)

    • What is LTE Advanced also called?

    <p>3.95G</p> Signup and view all the answers

    What codec is recommended for VoLTE according to 3GPP?

    <p>Adaptive Multi-Rate Wideband</p> Signup and view all the answers

    During a voice call on a non-VoLTE-enabled network, LTE handsets fall back to which type of network?

    <p>3G</p> Signup and view all the answers

    What is the frequency range supported by Full-HD Voice?

    <p>20 Hz to 20 kHz</p> Signup and view all the answers

    How many companies have declared essential patents covering the LTE standard according to the ETSI database?

    <p>50</p> Signup and view all the answers

    To ensure compatibility, 3GPP demands at least which codec for non-VoLTE-enabled networks or devices?

    <p>AMR-NB</p> Signup and view all the answers

    What is the recommended speech codec for VoLTE?

    <p>Adaptive Multi-Rate Wideband</p> Signup and view all the answers

    For end-to-end Full-HD Voice calls to succeed, what needs to support the feature?

    <p>Both the caller and recipient's handsets, as well as networks</p> Signup and view all the answers

    Which type of phone is needed for international roaming?

    <p><em>Multi-band capable</em> phone</p> Signup and view all the answers

    What is a key similarity between LTE-TDD and LTE-FDD?

    <p>They share 90% of their core technology</p> Signup and view all the answers

    Which international companies were involved in the development and testing of LTE-TDD?

    <p>China Mobile, Datang Telecom, Huawei, Intel, and Qualcomm</p> Signup and view all the answers

    In which year did trials of LTE-TDD begin?

    <p>2010</p> Signup and view all the answers

    Which operators were involved in the commercial deployment of LTE-TDD networks?

    <p>Aero2, Bharti Airtel, and Sprint</p> Signup and view all the answers

    What is E-UTRA in the context of LTE?

    <p>The air interface of LTE</p> Signup and view all the answers

    What is a significant achievement related to LTE-TDD demonstrated by Nokia Solutions and Networks?

    <p>Record-breaking throughput speeds of 2.6 gigabits per second using a LTE-TDD network</p> Signup and view all the answers

    Which companies were early promoters of VoLTE in the context of LTE?

    <p>China Mobile, Bharti Airtel, SoftBank Mobile, and Vodafone</p> Signup and view all the answers

    What was required for voice calls in LTE deployments before the implementation of VoLTE?

    <p>The use of circuit-switched fallback</p> Signup and view all the answers

    What is an advantage of LTE-TDD over LTE-FDD?

    <p>Offering cost savings and high capacity</p> Signup and view all the answers

    Which regions saw commercial deployment of LTE-TDD networks?

    <p>Poland, India, Japan, and the U.S.</p> Signup and view all the answers

    Where did Nokia Solutions and Networks complete VoLTE tests on China Mobile's TD-LTE network?

    <p>China</p> Signup and view all the answers

    When was the LTE standard first proposed?

    <p>1998</p> Signup and view all the answers

    Which company launched the first publicly available LTE service?

    <p>TeliaSonera</p> Signup and view all the answers

    What does LTE stand for?

    <p>Long-Term Evolution</p> Signup and view all the answers

    What is the frequency range for LTE-TDD?

    <p>1850 MHz to 3800 MHz</p> Signup and view all the answers

    What is the name of the IP-based network architecture designed to replace the GPRS Core Network?

    <p>Evolved Packet Core (EPC)</p> Signup and view all the answers

    Which technology is LTE incompatible with?

    <p>2G and 3G networks</p> Signup and view all the answers

    What does LTE Advanced Pro refer to?

    <p>Further evolution of LTE Advanced approved in 2015</p> Signup and view all the answers

    What technology did CDMA operators initially plan to upgrade to before migrating to LTE?

    <p>UMB and WiMAX</p> Signup and view all the answers

    What was the year when LTE Advanced was standardized?

    <p>2011</p> Signup and view all the answers

    Which organization developed the LTE-TDD technology?

    <p>An international coalition of companies</p> Signup and view all the answers

    What is the main aim of LTE technology?

    <p>Increasing capacity and speed using new DSP techniques and modulations, and simplifying the network architecture to an IP-based system.</p> Signup and view all the answers

    Study Notes

    • LTE (Long-Term Evolution) is a wireless data communication technology developed by ETSI, with contributions from various nations and companies, aimed at increasing capacity and speed using new DSP techniques and modulations, and simplifying the network architecture to an IP-based system.
    • LTE is incompatible with 2G and 3G networks, requiring separate radio spectrum, and was first proposed in 1998 with studies on the use of COFDM in the L band at 1428 MHz.
    • The LTE standard was finalized in December 2008, and the first publicly available LTE service was launched by TeliaSonera in December 2009, with major North American carriers following suit in 2010.
    • CDMA operators initially planned to upgrade to rival standards like UMB and WiMAX, but have since announced their intentions to migrate to LTE instead.
    • LTE Advanced was standardized in March 2011, with services commencing in 2013, and further evolution known as LTE Advanced Pro approved in 2015.
    • LTE supports fast-moving mobiles, multi-cast and broadcast streams, and scalable carrier bandwidths from 1.4 MHz to 20 MHz, with both FDD and TDD options.
    • The IP-based network architecture, called the Evolved Packet Core (EPC), is designed to replace the GPRS Core Network, supporting seamless handovers to older network technologies such as GSM, UMTS, and CDMA2000.
    • LTE-TDD (Time-Division Duplex) is one of two mobile data transmission technologies of the LTE standard, co-developed by an international coalition of companies, and uses a single frequency for uploading and downloading data through time, with frequencies ranging from 1850 MHz to 3800 MHz and a cheaper and less trafficked spectrum.

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    Test your knowledge of LTE-TDD and LTE-FDD technology with this quiz. Learn about the similarities and differences between the two types of LTE, and how they are implemented by companies and operators globally.

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