1. All Rights Reserved, Copyright©2008, FUJITSU LIMITED. and FUJITSU LABORATORIES LIMITED. REV-080055 Technology Considerations for LTE-Advanced 3GPP TSG RAN IMT-Advanced Workshop Shenzhen, China, 7 - 8 April 2008 FUJITSU LIMITED. FUJITSU LABORATORIES LIMITED. REV-080055

2. All Rights Reserved, Copyright©2008, FUJITSU LIMITED. and FUJITSU LABORATORIES LIMITED. REV-080055 1 Contents Considerations for the requirements for LTE-Advanced Technologies for LTE-Advanced Full support of E-UTRA Rel.8 UEs Coverage enhancement Efficient spectrum usage Reduced UE complexity/power consumption

3. All Rights Reserved, Copyright©2008, FUJITSU LIMITED. and FUJITSU LABORATORIES LIMITED. REV-080055 2 Considerations for the requirements for LTE-Advanced

4. All Rights Reserved, Copyright©2008, FUJITSU LIMITED. and FUJITSU LABORATORIES LIMITED. REV-080055 3 Voice band Modem FTTH VDSL CATV xDSL ISDN 1990 1995200020052010 1G 100K 1K 1M 100M 10M 10K Peak Data Rate [bit/s] Wired communication Transition of Peak Data Rate 20152020 IMT- Advanced Source: Ministry of International Affairs and Communications, Japan IMT-2000(3G) ● HSDPA (7.2M) ● Cdma2000EV-DO （ 2.4M) ● W-CDMA (384k) ● 3G-LTE Wireless communication

5. All Rights Reserved, Copyright©2008, FUJITSU LIMITED. and FUJITSU LABORATORIES LIMITED. REV-080055 4 Capability of IMT-Advanced Mobility High Low 1101001000 Peak useful data rate (Mbit/s) IMT-2000 Enhancement Enhanced IMT-2000 New mobile access New capabilities of systems beyond IMT-2000 Dashed line indicates that the exact data rates associated with systems beyond IMT- 2000 are not yet determined Systems beyond IMT-2000 will encompass the capabilities of previous systems New nomadic/local area wireless access Denotes interconnection between systems via networks, which allows flexible use in any environment without making users aware of constituent systems Nomadic/local area access systems Digital broadcast systems Source ： RECOMMENDATION ITU-R M.1645 ， “Framework and overall objectives of the future development of IMT- 2000 and systems beyond IMT-2000” ， June 2003

6. All Rights Reserved, Copyright©2008, FUJITSU LIMITED. and FUJITSU LABORATORIES LIMITED. REV-080055 5 From 3G to Beyond 3G W-CDMA HSDPA/ HSUPA LTELTE-Advanced Access method DL: CDMA UL: CDMA DL: CDMA UL: CDMA DL: OFDMA UL: SC-FDMA DL:OFDM(?) UL: SC-FDMA(?) Bandwidth (max.) 5 MHz 20 MHz>100 MHz ModulationHPSK,QPSK HPSK QPSK 16QAM QPSK 16QAM 64QAM QPSK 16QAM 64QAM,etc. Data Rate (max.) DL: 384kbps UL: 64kbps DL: 14.4Mbps UL: 5.7Mbps DL: 300Mbps UL: 75Mbps DL: ~1Gbps UL: >50Mbps Frequency 800MHz ， 850MHz ， 900MHz ， 1.5GHz, 1.7GHz, 1.8GHz, 1.9GHz, 2.1GHz, 2.6GHz Same frequency bands as 3G Additional Frequency bands Identified for IMT (WRC2007) AvailabilityFY2000FY2006-2008FY2009Around FY2015

7. All Rights Reserved, Copyright©2008, FUJITSU LIMITED. and FUJITSU LABORATORIES LIMITED. REV-080055 6 Technologies for LTE-Advanced

8. All Rights Reserved, Copyright©2008, FUJITSU LIMITED. and FUJITSU LABORATORIES LIMITED. REV-080055 7 Full support of E-UTRA Rel.8 UEs Smooth migration from Rel. 8 LTE to LTE-advanced Efficient mixed deployment of both systems Allocating multiple of 20MHz segment for an LTE-Advanced system bandwidth will be a promising approach

9. All Rights Reserved, Copyright©2008, FUJITSU LIMITED. and FUJITSU LABORATORIES LIMITED. REV-080055 8 Full support of E-UTRA Rel.8 UEs (Cont’) E-UTRA to IMT-Advanced Migration scenarios Case 1: All the segments of 20MHz support Rel. 8 LTE UEs Case 2: Only one segment of 20MHz in the system bandwidth supports Rel. 8 LTE UEs Case 3: Combination of above two cases (Interim stage)

10. All Rights Reserved, Copyright©2008, FUJITSU LIMITED. and FUJITSU LABORATORIES LIMITED. REV-080055 9 Coverage enhancement High peak data rate with reasonable coverage Higher transmission power in UE Higher carrier frequencies (eg. 3.5GHz) Possible resolutions to achieve reasonable cell coverage: Distributed remote antennas Advanced beam-forming Pico/femto cells (Home eNBs) Relay stations: A possible promising feature

11. All Rights Reserved, Copyright©2008, FUJITSU LIMITED. and FUJITSU LABORATORIES LIMITED. REV-080055 10 Coverage enhancement (Cont’) Conventional FFR: Sacrifices sector throughputs but obtains a high user coverage gain Advanced adaptive FFR: Parameter control based on interference level in neighbouring cells Achieve both sector throughput and user coverage gains Adaptive Fractional Frequency Reuse (aFFR)

12. All Rights Reserved, Copyright©2008, FUJITSU LIMITED. and FUJITSU LABORATORIES LIMITED. REV-080055 11 Efficient spectrum usage To get wider spectrum bandwidth up to 100MHz Aggregation of fragmented spectrums Sharing of fragmented spectrums among several systems Asymmetric UL and DL spectrum allocation To attain another ‘bit/Hz’ SU-MIMO for UL (2x2 or 2x4) Further enhancement of the current MIMO scheme

13. All Rights Reserved, Copyright©2008, FUJITSU LIMITED. and FUJITSU LABORATORIES LIMITED. REV-080055 12 Reduced UE Complexity, Power consumption Balance between the system performance And UE complexity, power consumption Peak power consumption of an UE will be higher Enhanced dynamic control of reception bandwidth A multi-carrier UL transmission mode by UE near the eNB Enabling discontinuous resource allocation Easy utilization of MLD at eNB receivers

14. All Rights Reserved, Copyright©2008, FUJITSU LIMITED. and FUJITSU LABORATORIES LIMITED. REV-080055 13 Conclusion Based on the requirements for LTE-Advanced, some technical considerations are being considered. Full support of E-UTRA Rel.8 UEs Coverage enhancement Efficient spectrum usage Reduced UE complexity/power consumption Further developments to be made in order to: Realize the attractive system for the market in Time

15. All Rights Reserved, Copyright©2008, FUJITSU LIMITED. and FUJITSU LABORATORIES LIMITED. REV-080055 14