Technology Considerations for LTE-Advanced.ppt

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1、All Rights Reserved, Copyright2008, FUJITSU LIMITED. and FUJITSU LABORATORIES LIMITED. REV-080055,Technology Considerations for LTE-Advanced,3GPP TSG RAN IMT-Advanced Workshop Shenzhen, China, 7 - 8 April 2008FUJITSU LIMITED. FUJITSU LABORATORIES LIMITED.,REV-080055,All Rights Reserved, Copyright200

2、8, 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,All Rights Reserved, C

3、opyright2008, FUJITSU LIMITED. and FUJITSU LABORATORIES LIMITED. REV-080055,2,Considerations for the requirementsfor LTE-Advanced,All Rights Reserved, Copyright2008, FUJITSU LIMITED. and FUJITSU LABORATORIES LIMITED. REV-080055,3,Voice band Modem,CATV xDSL,ISDN,Peak Data Rate bit/s,Wired communicati

4、on,Transition of Peak Data Rate,2015,2020,IMT-Advanced,Source: Ministry of International Affairs and Communications, Japan,All Rights Reserved, Copyright2008, FUJITSU LIMITED. and FUJITSU LABORATORIES LIMITED. REV-080055,4,Capability of IMT-Advanced,Mobility,High,Low,1,10,100,1000,Peak useful data r

5、ate (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

6、,New nomadic/local area wireless access,Source： RECOMMENDATION ITU-R M.1645，“Framework and overall objectives of the future development of IMT-2000 and systems beyond IMT-2000”，June 2003,All Rights Reserved, Copyright2008, FUJITSU LIMITED. and FUJITSU LABORATORIES LIMITED. REV-080055,5,From 3G to Be

7、yond 3G,All Rights Reserved, Copyright2008, FUJITSU LIMITED. and FUJITSU LABORATORIES LIMITED. REV-080055,6,Technologies for LTE-Advanced,All Rights Reserved, Copyright2008, FUJITSU LIMITED. and FUJITSU LABORATORIES LIMITED. REV-080055,7,Full support of E-UTRA Rel.8 UEs,Smooth migration from Rel. 8

8、LTE to LTE-advanced Efficient mixed deployment of both systemsAllocating multiple of 20MHz segment for an LTE-Advanced system bandwidth will be a promising approach,All Rights Reserved, Copyright2008, FUJITSU LIMITED. and FUJITSU LABORATORIES LIMITED. REV-080055,8,Full support of E-UTRA Rel.8 UEs (C

9、ont),E-UTRA to IMT-Advanced Migration scenariosCase 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),All Rights Reserved, Copyright2008, FUJITSU LIMITED. and FU

10、JITSU 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 cel

11、ls (Home eNBs) Relay stations: A possible promising feature,All Rights Reserved, Copyright2008, 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: Par

12、ameter control based on interference level in neighbouring cells Achieve both sector throughput and user coverage gains,Adaptive Fractional Frequency Reuse (aFFR),All Rights Reserved, Copyright2008, FUJITSU LIMITED. and FUJITSU LABORATORIES LIMITED. REV-080055,11,Efficient spectrum usage,To get wide

13、r spectrum bandwidth up to 100MHz Aggregation of fragmented spectrums Sharing of fragmented spectrums among several systems Asymmetric UL and DL spectrum allocationTo attain another bit/Hz SU-MIMO for UL (2x2 or 2x4) Further enhancement of the current MIMO scheme,All Rights Reserved, Copyright2008,

14、FUJITSU LIMITED. and FUJITSU LABORATORIES LIMITED. REV-080055,12,Reduced UE Complexity, Power consumption,Balance between the system performance And UE complexity, power consumptionPeak power consumption of an UE will be higherEnhanced dynamic control of reception bandwidth A multi-carrier UL transm

15、ission mode by UE near the eNB Enabling discontinuous resource allocation Easy utilization of MLD at eNB receivers,All Rights Reserved, Copyright2008, FUJITSU LIMITED. and FUJITSU LABORATORIES LIMITED. REV-080055,13,Conclusion,Based on the requirements for LTE-Advanced, some technical considerations

16、 are being considered. Full support of E-UTRA Rel.8 UEs Coverage enhancement Efficient spectrum usage Reduced UE complexity/power consumptionFurther developments to be made in order to: Realize the attractive system for the market in Time,All Rights Reserved, Copyright2008, FUJITSU LIMITED. and FUJITSU LABORATORIES LIMITED. REV-080055,14,