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발표자 : 전지훈

4G. 발표자 : 전지훈. What is 4G? (1/3). The next complete evolution in  wireless communications SBI2K(Systems Beyond IMT 2000) ITU(International Telecommunication Union) 의 국제 표준화 기구. What is 4G? (2/3). No formal definition for what 4G is

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발표자 : 전지훈

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  1. 4G 발표자 : 전지훈

  2. What is 4G? (1/3) • The next complete evolution in wireless communications • SBI2K(Systems Beyond IMT 2000) • ITU(International Telecommunication Union)의 국제 표준화 기구

  3. What is 4G? (2/3) • No formal definition for what 4G is • Certain objectives that are projected for 4G • Fully IP-based integrated system • Capable of providing between 100 Mbit/s and 1 Gbit/s speeds both indoors and outdoors, with premium quality and high security

  4. What is 4G? (3/3) • A 4G system will be able to provide • a comprehensive IP solution • Voice, data and streamed multimedia can be given to users on an "Anytime, Anywhere" basis • Higher data rates than previous generations

  5. Objectives of the 4G standard (1/3) • A spectrally efficient system • High network capacity • more simultaneous users per cell • A nominal data rate of 100 Mbit/s while the client physically moves at high speeds relative to the station, and 1 Gbit/s while client and station are in relatively fixed positions

  6. Objectives of the 4G standard (2/3) • A data rate of at least 100 Mbit/s between any two points in the world • Smooth handoff across heterogeneous networks • Seamless connectivity and global roaming across multiple networks

  7. Objectives of the 4G standard (3/3) • High quality of service for next generation multimedia support • real time audio, high speed data, HDTV video content, mobile TV, etc • Interoperability with existing wireless standards • An all IP, packet switched network • the infrastructure for 4G will be only packet-based

  8. Principal technologies (1/2) • Baseband techniques • OFDM(Orthogonal frequency-division multiplexing) : To exploit the frequency selective channel property • MIMO(multiple-input and multiple-output) : To attain ultra high spectral efficiency • Turbo principle : To minimize the required SNR(Signal-to-noise ratio) at the reception side

  9. Principal technologies (2/2) • Adaptive radio interface • Modulation, spatial processing including multi-antenna and multi-user MIMO • Relaying, including fixed relay networks (FRNs), and the cooperative relaying concept, known as multi-mode protocol

  10. Future of 4G (1/2) • Standards of 4G technologies • Mobile WiMax Evolution : 우리나라 주도, data 전송에 유리 • 3GPP Long Term Evolution : 유럽 주도, 세계 이동통신 시장을 장악하고 있는 (W-CDMA) 서비스를 기반으로 함 • 3GPP2 Ultra Mobile Broadband : 퀄컴 주도, 동기식인 EVDO 기술의 차세대 버전

  11. Future of 4G (2/2) • Advantages • 빠른 통신 속도 : 다양한 멀티미디어 서비스 및 data 전송 • Convergence : 음성, 영상, 데이터가 한꺼번에 처리되는 트리플 플레이 서비스(TPS)가 가능

  12. Future of 4G (3/3) • Disadvantages • 구축 비용 : 3G에서 4G로 넘어가기 위해 필요한 네트워크 장비의 교체 등 • IP의 확보 : Fully IP-based integrated system이므로 충분한 수의 IP 필요 – IPv6

  13. Reference • http://www.wikipedia.org/ • http://www.etnews.co.kr/

  14. Any Questions?

  15. Thank you.

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