促销工作手册.doc

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1、H: Remote Radio Head Subject-C Multi-RAT system technologies for multi-band and multi-access layered cells LTE 5G RAT Wi-Fi WiGig Radio resource management Control equipment Core NW LTE-A Terminal Panasonic, Fujitsu, DOCOMO,NTT, UEC Distributed antennas Centralized base band unit Low SHF band Transm

2、it point Ultra high-density small cells Optical fiber Subject-A Ultra high-density distributed antenna systems Fujitsu, DOCOMO, NTT, Tohoku Univ. BB U RRH BB U RRH BB U RRH BB U RRH BB U RRH Central Office High volume of optical fiber need efficient front haul High volume of RRH need efficient O&M S

3、ubject-B Optical access technologies accommodating highly densified small cells NTT, Fujitsu, DOCOMO, Mitsubishi, Tohoku Univ.5 Establish radio access technologies for 5G system realizing high data rate and low power consumption Subject-A ： Massive MIMO and beam control technologies for low SHF band

4、s to achieve 5 Gbps Subject-B ： Wideband Massive MIMO and beam control technologies for high SHF bands to achieve 20 Gbps Subject-C ： Discovery technologies for terminals with ultra-low power consumption PJ-II: High Data Rate and Low-Power-Consumption Radio Access Technologies with Ultra Higher-Freq

5、uency-Band and Wider- Bandwidth Massive MIMO 16+ streams multiplexing Analog beamformer UE #1 UE #2 Beam 1 Beam 2 Beam 16 UE #16 Modem #1 Modem #16 Modem #2 D/ A Digital precoding Wideband modem D/ A D/ A RF front-end RF front-end RF front-end Beam & multiplexing controller Over 400MHz bandwidth 256

6、+ antenna elements Massive antennas for high SHF bands Subject-B Wideband Massive MIMO and beam control technologies for high SHF bands Mitsubishi, DOCOMO Massive antennas for low SHF bands Large path-loss Low data rate UE High data rate UE Penetration loss Subject-C Discovery technologies for termi

7、nals with ultra-low power consumption Detection technologies for extremely low-power request- to-send signals Efficient radio resource algorithm NEC, DOCOMO Advanced optical feeder Massive antennas for low SHF bands High accuracy beam control & inter-site beam switching 8+ users multiplexing 10G-Eth

8、ernet Antennas & RF integration 128+ antenna elements Central Unit Subject-A Massive MIMO and beam control technologies for low SHF bands DOCOMO, NEC, NTTDistributed Antenna System User-centric Virtual Small-cell It may be wise to exploit more the spatial domain A large number of antennas are distri

9、buted in a macro-cell area Each distributed antenna is connected to macro-cell BS (MBS) by optical link A group of distributed antennas nearby a user forms a user centric virtual small- cell within a macro-cell area Virtual small-cell moves dynamically according to the user movement Handover problem

10、 can be replaced with antenna selection problem Path loss and shadowing loss problems can be mitigated Near single-user access is possible 2016/7/20 FA/Tohoku University 6 MBS TRx MBS TRx controller Near single- user access User-centric virtual small-cell Macro-cell area Pool of baseband TRxs Optica

11、l link Distributed antenna small-cell network0.01 0.1 1 10 01234567891 0 0.01 0.1 1 10 01 02 03 04 05 06 07 08 09 01 0 0 Frequency (MHz) Frequency (MHz) Channel gain Channel gain Severely Frequency- selective Channel The transfer function H(f, t) of broadband channel at time t is not constant and va

12、ries over the signal bandwidth In such a severely frequency-selective channel, advanced equalization technique is necessary OFDMA with frequency- domain equalization (FDE) Single-carrier access with FDE 2016/7/20 FA/Tohoku University 7 1 0 ) 2 exp( ) ( ) , ( L l l l f j t h t f H L=16 uniform power delay profile l-th path time delay=100l + - 50,50)nsTDD Allows Transmit Equalization TDD can exploit the channel reciprocity to introduce the transmit equalization without feeding back the channel state information (CSI) from user equ_