4G Technology


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An introduction to the 4th generation of mobile phone mobile communications standard and comparison with previous standards.
Prepared for Computer Network & Database Administration course.
Presented at Multimedia University, Malaysia by Ali Mohammad Hossein Zadeh, 2011.

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  • One of the basic concepts in data communication is the idea of allowing several transmitters to send information simultaneously over a single communication channel.It allows several users to share the same frequency channel by dividing the signal into different time slots.
  • GPRS and EDGE are defined as "3G" services (because they are defined in IMT-2000 specification documents), But are considered by the general public to be 2.5G services (or 2.75G which sounds even more sophisticated) because they are several times slower than present-day 3G services.
  • Orthogonal Frequency-Division Multiple Access (OFDMA) is a multi-user version of the popular Orthogonal frequency-division multiplexing (OFDM)digital modulation scheme. Multiple access is achieved in OFDMA by assigning subsets of subcarriers to individual users as shown in the illustration below.
  • HSPA: High Speed Packet Access-UMTS: Universal Mobile Telecommunication System-
  • 4G Technology

    1. 1. 4G TechnologyAli Mohammad Hossein Zadeh (1101600641)FCM – April 2011
    2. 2. 2Overview1. 0G 12. Clear 4G?2. 1G 13. P1 4G?3. Cellular Telephone 14. What we have now? System 15. 4G candidates4. 2G 16. 4G in Malaysia5. TMDA and CMDA 17. Key Technologies for 4G 18. OFDMA6. 2G Evolution 19. MIMO7. 3G 20. How WIMAX is better9. 4G Requirements by 21. How LTE is better ITU 22. References10. 3G vs. 4G11. 4G discontinued candidate systems
    3. 3. 30G or Mobile Radio Telephone Predecessors of cellular telephones Based on radio frequencies Transmitter-Receiver (transceiver) with Antenna Technologies: PTT, MTS, IMTS, AMTS Mounted in Cars, Trains, Ships Different power based on platform
    4. 4. 41G Cellular Telephone System Analog, Voice Only, Digital signaling First lunched in Japan by NTT, 1979 Voice modulated to higher frequency 150 MHz and up 1st international roaming Different technologies in different countries: NMT, Hicap, Mobitex, DataTAC
    5. 5. 5Cellular Telephone System Mobile Telephone Base Transceiver Public Switching Office Station Switched Telephone Network
    6. 6. 62G 1st lunched in Finland by Radiolinja, 1991 Conversations encrypted digitally, SMS, E-Mail Digital Signals > Compressing > Increase system capacity Less radio Power > Smaller Devices Technologies: Time division multiple access (TDMA), Code division multiple access (CDMA)
    7. 7. 7TDMA and CDMA TDMA CDMA
    8. 8. 82G Evolution 2.5G – General Packet Radio Service (GPRS) • Standardized by ETSI • Data rates from 56 kbit/s up to 115 kbit/s • Wireless Application Protocol (WAP) • Multimedia Messaging Service (MMS) • Internet communication services • Sending SMS faster
    9. 9. 92G Evolution 2.75G – Enhanced Data rates for GSM Evolution (EDGE) • Standardized by 3GPP • higher-order PSK/8 phase shift keying • Incremental Redundancy • Data rates up to 236.8 kbit/s – Evolved EDGE • Bit rates are increased up to 1 MBit/s peak bandwidth • Latencies down to 80 • Signal quality is improved
    10. 10. 103G 1st lunched in Japan by NTT, 2001 Data rate of 2 Mbit/s for stationary users and 384 kbit/s in a moving vehicle Security Wide-area wireless voice telephone Video calls Mobile TV
    11. 11. 113G vs. 4G
    12. 12. 124G Requirements by ITU 100 Mbit/s moving users and 1 Gbit/s stationary users IP packet-switched network More users per cell Smooth handovers across heterogeneous networks Offer high quality of service for next generation multimedia
    13. 13. 13Clear 4G?
    14. 14. 14P1 4G?
    15. 15. 15What we have now? LTE – Long Term Evolution – A project by the 3rd Generation Partnership Project (3GPP) WiMax – Worldwide Interoperability for Microwave Access – A project by the Institute of Electrical and Electronics Engineers (IEEE)
    16. 16. 164G discontinued candidate systems 3GPP Long Term Evolution (LTE) Mobile WiMAX (IEEE 802.16e) UMB (formerly EV-DO Rev. C) Flash-OFDM iBurst and MBWA (IEEE 802.20)
    17. 17. 174G CandidatesIn 2009 these technologies submitted to ITU as 4G candidates: LTE Advanced – Not a new technology – Will be ready in 2012 – Standardized by 3GPP IEEE 802.16m or WirelessMAN-Advanced – Under development – Standardized by IEEE
    18. 18. 18Key Technologies for 4G Orthogonal frequency-division multiple access (OFDMA) multiple-input and multiple-output (MIMO) Both are use in LTE Advanced and WirelessMAN-Advanced
    19. 19. 19OFDMA OFDMA can also be described as a combination of frequency domain and time domain multiple access, where the resources are partitioned in the time- frequency space, and slots are assigned along the OFDM symbol index as well as OFDM sub-carrier index.
    20. 20. 20MIMO The technology where there are multiple antennas at the base station and multiple antennas at the mobile device. Multiple antennas at both the base station and terminal can significantly increase data rates with sufficient multipath
    21. 21. 214G in Malaysia 19th November,2010, Yes4G WiMAX luched by YTLC – 5X faster then 3G (note 3g is only 384kbps) 5th of April,2011, P1 , world’s first WIMAX- Long Term Evolution Time Division Duplex (LTE TDD) – On the peak downlink throughput in a cell, the demo reached an impressive 130Mbps on a 20MHz band.
    22. 22. 22How WIMAX is better
    23. 23. 23How LTE is better
    24. 24. 24SummaryGeneration Definition Speed Real Speed Technology 1 Analog - - AMPS,NMT,... 2 Digital 9.6–14.4 kbps - TDMA- (Narrow CDMA- GSM Band Circuit Data) 2.5 Packet Data 171 kbps 20-40 kbps GPRS 3 Digital 3.1 Mbps 500-700 CDMA2000- Broadband kbps EDGE-UMTS Packet Data 3.5 3.6 Mbps 1-3 Mbps HSPA 4 Digital 100-300 Mbps 3-5 Mbps LTE Broadband Advanced- Packet Data WiMaxMan All IP Advanced
    25. 25. 25References Nishat Kabir, Rhituparna Paul, Tahnia Farheen (2008). 4G Mobile Architecture. Retrieved from http://salmandk.weebly.com/uploads/1/9/5/2/1952819/ug_thesis_on _4g_mobile_architechture.pdf Allen H. Kupetz, K. Terrell Brown (2003). 4G - A Look Into the Future of Wireless Communications. Rollins Business Journal. http://en.wikipedia.org/wiki/Mobile_radio_telephone http://en.wikipedia.org/wiki/1G http://en.wikipedia.org/wiki/2G http://en.wikipedia.org/wiki/3G http://en.wikipedia.org/wiki/4G http://www.youtube.com/watch?v=ESxAajD_nM0&feature=related http://www.lteportal.com/ http://www.mybroadbandnews.com/ http://www.gsmworld.com/
    26. 26. СпасибоThank You ありがとう ‫تشکر‬ Dank Grazie ‫شکرا‬ Terima kasih고마워 谢谢 धन्यवादGracias ขอขอบคุณ