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OFDMA SYSTEM Mobile WiMAX 802.16e and Next Generation PHS Fire Tom Wada Professor, Information Engineering, Univ. of the Ryukyus 1 System Architecture.

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Presentation on theme: "OFDMA SYSTEM Mobile WiMAX 802.16e and Next Generation PHS Fire Tom Wada Professor, Information Engineering, Univ. of the Ryukyus 1 System Architecture."— Presentation transcript:

1 OFDMA SYSTEM Mobile WiMAX 802.16e and Next Generation PHS Fire Tom Wada Professor, Information Engineering, Univ. of the Ryukyus 1 System Architecture 2008 5/28/2016

2 New Broadband Wireless Access Service in Japan Japan government assigned 2.5GHz BWA bands to Two Companies on 2007/December. 1.UQ communications (KDDI)  2,595MHz - 2,625MHz 30MHz bands  Mobile WiMAX (802.16e, OFDMA) 2.Willcom  2,545MHz - 2,575MHz  (2,545 - 2,555MHz after 2014)  XG-PHS (OFDMA, SC-FDMA) They starts service on 2009. 5/28/2016 System Architecture 2008 2

3 Wireless Communication Services In-door ◦ WLAN  802.11b (CDMA) → 802.11g/a (OFDM) → 802.11n (MIMO-OFDM) Out-door ◦ Cell Phones  PDC, CDMA, CDMA2000, WCDMA → 3.9G LTE (OFDMA, SC-FDMA)  PHS → XG-PHS (OFDMA, SC-FDMA) ◦ New  WiMAX (802.16d, OFDMA) → Mobile WiMAX (802.16e, OFDMA) ALL systems are shifting to OFDM/OFDMA. 3 System Architecture 2008 5/28/2016

4 UQ communications Mobile WiMAX Schedule ◦ 2008/8 ： 1st Base Station ◦ 2009/2 ： Experimental Service in Tokyo/Yokohama ◦ 2009/summer ： Public service starts in limited area 4 System Architecture 2008 5/28/2016

5 Willcom WILLCOM CORE : Next Generation PHS(XGPHS) 2009/4 ： limited Area Service in Tokyo 2009/10 ： Public Service Starts in Tokyo, Nagoya, Osaka - 2012/3: All prefecture’s capital city - 2013/3 ： Other city Area in Japan 5 System Architecture 2008 5/28/2016

6 Multiple Access System Architecture 2008 6 Base Station (BS) DownLink UpLink 5/28/2016

7 Multiplexing Separate Downlink and Uplink FDD : Frequency Division Duplex TDD: Time Division Duplex Separate Each User FDD : Frequency Division Duplex TDD: Time Division Duplex OFDM: Orthogonal Frequency Division Multiple Access BWA systems Mobile WiMAX, XG-PHS use TDD-OFDMA! System Architecture 2008 75/28/2016

8 OFDMA System Architecture 2008 8 BS User A User B User C Spectrum Frequency User A User B User C Frequency Time User A User B User C 5/28/2016

9 OFDM vs OFDMA (1) 5/28/2016 System Architecture 2008 9

10 OFDM vs OFDMA (2) 5/28/2016 System Architecture 2008 10

11 MOBILE WIMAX (1) 5/28/2016 System Architecture 2008 11

12 IEEE 802.16e 5/28/2016 System Architecture 2008 12

13 802.16e Mobile WiMAX Highlights 16e targeting 1-3 mile radius mobile broadband connection for pedestrians and automobiles. 5/28/2016 System Architecture 2008 13

14 Applications for 16e According to QoS (Quality of Service) levels, most of applications are covered. 5/28/2016 System Architecture 2008 14 Mobile Phone Video Phone Internet

15 Scalable OFDMA service According to available BW, several FFT sizes are supported. Table shows an example. 5/28/2016 System Architecture 2008 15

16 Data Rate example Frame = 10ms ◦ Downlink = 7.5ms ◦ Uplink = 2.5ms 10MHz Bandwidth 5/28/2016 System Architecture 2008 16 28.29

17 17 Mobile WIMAX 8.75MHz SPEC BW8.75MHz n 8/7 Sampling Freq10.000MHz FFT size1024 ◦ DL Null=184, Pilot=120, Data=720 ◦ UL Null=184, Pilot=280, Data=560 # of sub-channels ◦ DL (2cluster)30 channel ◦ UL (6 tile)35 channel Sub-carrier space9.765625KHz Useful Symbol Tb102.4us Guard Interval Tg12.8us OFDM symbol Ts115.2us Symbols in Frame48(5ms frame) Modulation ◦ QPSK,16/64QAM CC ◦ DL R=1/2, 2/3, 3/4, 5/6 ◦ UL R=1/2, 2/3, 5/6 Repetitionx2, x4, x6 Data Channel ◦ DL PUSC only ◦ UL PUSC only System Architecture 2008 5/28/2016

18 Frame Structure 5/28/2016 System Architecture 2008 18

19 Frame Preamble: PN code of Base Station ID FCH: frame control header DL-MAP: detail Downlink information UL-MAP: detail Uplink infromation Burst: user data Sub-Channel: group of sub-carriers ◦ FUSC （ downlink fully used subchannelization ） ◦ PUSC （ Partially used subchannelization ） ◦ Advance Modulation and Coding subchannels （ AMC ） 5/28/2016 System Architecture 2008 19

20 PUSC (partially used subchannel) System Architecture 2008 20 0123456 Preamble Data Pilot Preamble cluster p Freque ncy Time 5/28/2016

21 802.16e Transceiver Architecture 5/28/2016 System Architecture 2008 21 Down conversion Up conversion AGC resamplederotator A/D D/A Inter- polator rotator FFT / IFFT RX TX equalizepermutation Inv- permutation demap map Repetition puncture Repetition depuncture Bit interleave Convolution Coding randomize Media Access Control (S/W ) Bit deinterleave Viterbi de randomize

22 XG-PHS NEXT GENERATION PERSONAL HANDYPHONE SYSTEM (2) 5/28/2016 System Architecture 2008 22

23 PHS MoU 5/28/2016 System Architecture 2008 23

24 PHS and XG-PHS 5/28/2016 System Architecture 2008 24

25 System Architecture 2008 25 XG-PHS OFDM TYPE4 10MHz Spec System BW10.0MHz Effective BW9.0MHz Sampling Freq19.2MHz FFT size512 ◦ 24subcarrier/PRU * 10 PRU ◦ 240subcarrier Number of PRU in Frequency axis ◦ 10 PRU Sub-carrier space37.5KHz Useful Symbol Tb26.67us Guard Interval Tg1/4(S1)=6.66us 1/8( 他 )=3.33us OFDM symbol Ts1/4(S1)=33.33us 1/8( 他 )=30.00us Frame length5.000ms ◦ 96000 point in 19.2Msps UL/DL2.5ms ◦ SLOT625us  Head Guard21.67us  Burst Time573.33us  Tail Guard30.00us 5/28/2016

26 Data Rate example Frame = 5ms ◦ Downlink =Uplink = 2.5ms 10MHz Bandwidth ◦ 40PRU (4Cch, 36Ich) for each down/up link  4 CCH PRU + 36 ICH PRU  CCH: 324 sc * 4=1296sc/2.5ms (BPSK, R=1/2)  ICH: 372sc*36=13392sc/2.5ms ICH Performance (DL+UL) 5/28/2016 System Architecture 2008 26

27 System Architecture 2008 27 Time Domain 5/28/2016

28 System Architecture 2008 28 Frequency Domain PRU1PRU2PRU3PRU4 PRU5PRU6PRU7PRU8 PRU9PRU10PRU11PRU12 PRU13PRU14PRU15PRU16 PRU17PRU18PRU19PRU20 PRU21PRU22PRU23PRU24 PRU25PRU26PRU27PRU28 PRU29PRU30PRU31PRU32 PRU33PRU34PRU35PRU36 PRU37PRU38PRU39PRU40 Time Frequency High Low Slot 650us UL 2500us DL 2500us PRU1PRU2PRU3PRU4 PRU5PRU6PRU7PRU8 PRU9PRU10PRU11PRU12 PRU13PRU14PRU15PRU16 PRU17PRU18PRU19PRU20 PRU21PRU22PRU23PRU24 PRU25PRU26PRU27PRU28 PRU29PRU30PRU31PRU32 PRU33PRU34PRU35PRU36 PRU37PRU38PRU39PRU40 24 subcarrier SubChannel SCH SCH 1 SCH 2 SCH 3 SCH 4 SCH 5 SCH 6 SCH 7 SCH 8 SCH 9 SCH 10 1 SCH is used for Common channel CCH Other SCHs are used for Individual channel ICH 5/28/2016

29 System Architecture 2008 29 Control Common Channel CCH PRU structure 5/28/2016

30 System Architecture 2008 30 Individual Channel ICH PRU structure 5/28/2016

31 CCH and ICH 5/28/2016 System Architecture 2008 31

32 Summary Next Generation Broadband Wireless Access services are introduced. OFDMA is key Technology. New two services coming soon in Japan 1.Mobile WiMAX (IEEE 802.16e) 2.XG-PHS ◦ TDD-OFDMA ◦ Several ten’s Mbps similar to WLAN for large area System Architecture 2008 325/28/2016

33 Final Report Task Choose one digital system using FPGA, DSP, Processor. Investigate the Hardware architecture and describe it in the report. Dead line : Feb 13 th Friday. Language: English or Japanese Send PDF file to wada@ie.u-ryukyu.ac.jpwada@ie.u-ryukyu.ac.jp 5/28/2016 System Architecture 2008 33

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