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 2

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 3

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 4

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 5

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 6

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 7

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 8

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 9

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 10

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 11

Future of 4G (3/3)  Disadvantages  구축 비용 : 3G 에서 4G 로 넘어가기 위해 필요한 네트워크 장비의 교체 등  IP 의 확보 : Fully IP-based integrated system 이므로 충분한 수의 IP 필요 – IPv6 12

Reference   13

Any Questions? 14

Thank you. 15