Shozo Okasaka. Masayuki Hoshino

Transcription

1 124 Panasonic Technical Journal Vol. 61 No. 2 Nov th-Generation Mobile Communication Systems empowering AV&ICT Solutions Shozo Okasaka Masayuki Hoshino Tetsuya Yamamoto Takayuki Sotoyama Akihiro Saito Seigo Nakao G5th-Generation Mobile Communication Systems 5 IMT-Advanced 5G 1IoT Internet of ThingsMTC Machine Type Communication 5th-generation mobile communication systems (5G) to be commercialized in 2020 and beyond have been attracting more and more attention both in Japan and overseas. The concept development for 5G includes capabilities that go beyond those for IMT-Advanced, e.g., reliability, data rates, capacity per area, user plane latency and energy saving. However it is less cost effective to achieve all those capabilities at the same time, with a single set of system configurations. Therefore one of the major features of 5G to be introduced is configurability of a radio access scheme focusing on particular capabilities that are friendly to targeted use case scenarios. The Company has been working on developing those kinds of flexible radio access technologies, as an important framework to realize a smart society. In this paper, several 5G-related activities are introduced, namely a) key technologies to realize heterogeneous network architecture with the aim of supporting multiple capabilities, and b) coverage enhancement techniques for Machine Type Communication to realize effective deployment for the Internet of Things. [1] IoT IoT G [2]-[4] 5GAV&ICT 3GPP3rd Generation Partnership ProjectRAN WG1Radio Access Network Working Group 1RAN WG2Working Group 2 MiWEBA Millimeter-Wave Evolution for Backhaul and Access[2] 5G 5G5G IoT/M2MMachine to Machine Repetition ITU4 4GIMT-Advanced 3GPPLTELong Term EvolutionLTE-Advanced2010

2 125 LTE2009LTE-Advanced [1][3] 20205G4G 5G 5G[4] 5G requirements[4] 5G 5G usage scenarios [3] 5GAV&ICT HetNet: Heterogeneous Networks 3 5G HetNet4 IoT M2M M2M MTC 4G5G HetNet Control-plane 5G 700 MHz3.5 GHz 6 GHz [3] 5G IMT-Advanced IMT-Advanced C/U C/U-split heterogeneous networks

3 126 Panasonic Technical Journal Vol. 61 No. 2 Nov User- plane C/UHetNet [5] BBUBaseband Unit RRHRemote Radio Head C-RANCentralized Radio Access Network C-RAN BBU C/UHetNet BBURRH I/Q CPRICommon Public Radio InterfaceLTE10 MHz 2I/Q1.23 Gbit/s CPRI ORI Open Radio Equipment InterfaceI/Q [7]I/Q ORII/Q[6] EVMError Vector Magnitude3 % 50 % 100 s I/QLTE ORILTE 2 13/4 3/4LTE 10 MHzI/Q MHz3/ MHz 10 MHz 9.02 MHz 215 bit10 bit2/31 50 % LTE f(x) g(x)[7] EVM g(x) I/Q I/Qg(x) g(x)=1.0 I/Q EVM I/Q g(x) EVM[8] LTE=1.6 =1.0 EVM=1.0 x = 1 exp 2 2 = = [8] Optimizing process of non-linear quantizer [8]

4 127 I/Q LTEUplink GHz10 MHz 0.41 s I/Q 0 db-36 db EVM I/Q 3/415-to-10 bits 3/415-to-10 bits -30 db 3.3 %EVM 0.2 %EVM I/Q LTE10 MHz 10 MHz I/Q Evaluation result of I/Q data compression 5G5GM2M 3GPPLTE-AdvancedRelease 13Rel.13 MTCM2M [9] MTC 1 Rel.13 MTC Repetition MTC MTC1.4 MHz 1.4 MHz [10] Repetition [11] 5G 4.1Repetition MTC LTE PUSCHPhysical Uplink Shared Channel PUSCH RepetitionN Rep N Rep MTC Repetition N Rep XX N Rep

5 128 Panasonic Technical Journal Vol. 61 No. 2 Nov N Rep /X Rel.13 MTC1.4 MHz 1.4 MHz20 MHz Y X Y X RepetitionN Rep 1/N Rep IoT Repetition SF SF SF=X N Rep BLERBlock Error RatePUSCH Repetition X=Y=4 BLER=10 % SNRSignal-to-Noise RatioRepetition 5 db~5.5 dbrel.13 MTC 18 db RepetitionN Rep 1SNR15 db Repetition Simulation parameters 1x2 with low correlation Extended Pedestrian A (Doppler frequency, f D =1 Hz) MCS 5 (QPSK) 2 GHz 10 MHz 20 Hz PUSCH repetitionbler BLER performance of PUSCH repetition Inter-subframe code spreading and multiplexing BLER 4 Repetition1 Repetition 25G

6 129 IMT-Advanced IMT-Advanced 5GMTC LTE-AdvancedMTC LTE-Advanced5G MTC Effect of code multiplexing [4] Afif Osseiran, Mobile and Wireless Communications system for 2020 and beyond (5G), ITU-R WP5D workshop on Research views on IMT beyond 2020, Feb [5] 5G RCS , Oct [6] ETSI, Open Radio Equipment Interface (ORI): Requirements for Open Radio Equipment Interface (ORI) (Release 4), Oct [7] ETSI, Open Radio Equipment Interface (ORI): interface Specification; Part 1: Low Layers (Release 4), Oct [8] [MiWEBA] ORI, B-17-16, Mar [9] RP , New WI proposal: Further LTE Physical Layer Enhancements for MTC, Sept [10] R , Discussion and performance evaluation on PUSCH coverage enhancement, Feb [11] R , Multiple subframe code spreading for MTC UEs, Oct AVC R&D Div., AVC Networks Company 5G HetNetI/Q IoTRepetition 5G AVC R&D Div., AVC Networks Company AVC R&D Div., AVC Networks Company AVC R&D Div., AVC Networks Company [1] MIC of Japan, Mobile communication traffic in Japan, Data base of ICT statistics, Dec [2] MiWEBA project website, 23.Oct [3] ARIB 2020 and Beyond Ad Hoc Group White Paper, Mobile Communications Systems for 2020 and Beyond, Oct AVC R&D Div., AVC Networks Company R&D Panasonic R&D Center Singapore