Next-Generation Mobile Network 加藤次雄 あらまし 45 3 202010 200 3.9 3.9G LTE Long Term Evolution 2010 12 LTE Abstract The number of people using cell phones in the world has exceeded 4.5 billion and this figure is continuing to grow. For the past several years, mobile data traffic such as Internet access, the downloading of music, and video communication has been nearly tripling every year. With the popularity of smart phones, mobile data traffic will increase 200 times in the next 10 years to 2020. There are high expectations that Long Term Evolution (LTE), which is known as a 3.9G wireless system, will be a new service platform that can support such a huge amount of mobile data traffic. This paper describes the features, technologies and network architecture of LTE, which started commercial service in December 2010 in Japan, realizing high-speed wireless access. FUJITSU. 62, 4, p. 377-382 07, 2011 377
まえがき 45 3 202010 200 1 3.9 3.9G LTE Long Term Evolution 2010 12 LTE LTE とは 図 -1 LAN LTE 3 3GW-CDMA Wideband Code Division Multiple Access HSPA High Speed Packet Access 100 Mbps 50 Mbps W-CDMA 3GPP 3rd Generation Partnership Project 2009 3 Release 8 4 3 4 4 HSPA 3.5 LTE 3.9 LTE 2005 3 3GPP 3 CS Circuit Switched PS Packet Switched LTE 1995 2000 2010 1G 2G ル AMPSIS-95 GSM PDC ETACS NTT WiFi 3G IMT-2000 WiMAX LTE W-CDMA/TD-SCDMA/HSPA CDMA2000 EV-DO/DV 2.4 GHz 802.11b 802.16-2004 5 GHz 802.11a/g LTE-Advanced 802.16e 802.16m 802.11n ク PAN Bluetooth 802.15.1 ZigBee 802.15.4 UWB 802.15.3a 40 k 2 M 14 M 54 M 100 M bps 1 G PAN Personal Area Network EV-DO Evolution Data Only EV-DV Evolution Data and Voice UWB Ultra Wide Band WiFi Wireless Fidelity AMPS Advanced Mobile Phone System ETACS Extended Total Communications System IS-95 Interim Standard-95 GSM Global System for Mobile Communications PDC Personal Digital Cellular TD-SCDMA Time Division Synchronous Code Division Multiple Access -1 Fig.1-Trends of mobile communication systems. 378 FUJITSU. 62, 4 07, 2011
PS VoIP Voice over IP PS 3 3GPP TR25.913 2 LTE 1 2 1.4 20 MHz 3 100 ms 5 ms 4 100 Mbps 50 Mbps 5 3.5 3 2 6 3 / 3.5 LTE 主要技術 LTE LTE 3 5 1 LAN OFDMA Orthogonal Frequency Division Multiple Access OFDMA 33.5 CDMA Code Division Multiple Access 3 4 Single-Carrier FDMA 2 MIMO Multiple Input Multiple Output MIMO LTE 4 MIMO 3 3.5 HSPA 5 MHz LTE20 MHz 4 4 LTE 1.4 3 5 10 15 20 MHz 4 VoIP LTE 3.5 2 図 -2 5 ms LTE 33.5 表 -1 ネットワーク構成 LTE 3GPP SAE System Architecture Evolution IP EPC FUJITSU. 62, 4 07, 2011 379
Evolved Packet Core LTE 3GPP Release 8 EPC 6 7 1 3 IMS IP Multimedia MME/S-GW UE X2 X2 UE X2 MME/S-GW UE -2 LTE Fig.2-LTE wireless network architecture. Subsystem 2 ON EPC 100 ms 3 EPC LTE 3 W-CDMA 3.5 HSPA3GPP CDMA2000 WiMAX WiFi IP EPC 図 -3 MME Mobility Management Entity W-CDMA HSPA EPC S-GW Serving Gateway LTE enhanced Node B LTEW-CDMA/HSPA -1 W-CDMA HSDPA/EUL CDMA2000 1xEV-DO 3G 3.5G Rev.0 Rev.A LTE DL CDMA DL CDMA DL CDMA DL CDMA DL OFDMA UL CDMA UL CDMA UL CDMA UL CDMA UL SC-FDMA 5 MHz 5 MHz 1.25 MHz 1.25 MHz 20 MHz HPSK QPSK HPSK QPSK BPSK QPSK BPSK QPSK QPSK 16QAM 16QAM 8PSK 16QAM 8PSK 16QAM 64QAM DL 384 kbps UL 64 kbps DL 14.4 Mbps UL 5.7 Mbps DL 2.4 Mbps UL 154 kbps DL 3.1 Mbps UL 1.8 Mbps DL 325 Mbps UL 86 Mbps 2000 HSDPA 2006 EUL 2008 2003 2006 2009 380 FUJITSU. 62, 4 07, 2011
W-CDMA/HSPA NodeB/RNC SGSN HSS 3GPP ク LTE MME S-GW PCRF P-GW IP ー IMS 3GPP ク WiMAX WiFi -3 EPC Fig.3-EPC network architecture. P-GW Packet Data Network Gateway IMS IP IP IP WiMAX WiFi 3GPP PCRF Policy and Charging Rules Function EPC QoS P-GW S-GW PCRF HSS Home Subscriber Server NodeB MMEHSS SGSN Serving GPRS Support Node W-CDMA HSPA IP EPC むすび LTE 3GPP LTE-Advanced LTE- Advanced 4 LTE LTE20 MHz 100 MHz 8 MIMO 1 Gbps LTE LTE EPC LTE LTE LTE-Advanced 参考文献 1 32 2 3GPP TR25.913 Requirements for Evolved UTRA (E-UTRA) and Evolved UTRAN (E-UTRAN (Release 8) 3 3GPP TS36.300 Evolved Universal Terrestrial Access (E-UTRA) and Evolved Universal Terrestrial Access Network (E-UTRAN) overall description FUJITSU. 62, 4 07, 2011 381
stage2 (Release 8) 4 3GPP TR36.913 Requirements for Further Advancement for E-UTRA (LTE-Advanced) (Release 8) 5 LTE/WiMAX FUJITSU Vol.60 No.4 p.304-309 2009 6 3GPP TS23.401 General Packet Radio Service (GPRS) Enhancements for Evolved Universal Terrestrial Radio Access Network (E-UTRAN) access (Release 8) 7 3GPP TS23.402 Architecture enhancements for non-3gpp accesses (Release 8) 著者紹介 加藤次雄 ( かとうつぐお ) IP 382 FUJITSU. 62, 4 07, 2011