Presentation on theme: "1 Recent Activity on Space Communications Projects - ETS-VIII, WINDS, and STICS..- WINDSETS-VIII Nov. 13, 2008 Ryutaro Suzuki Space Communications Group."— Presentation transcript:
1 Recent Activity on Space Communications Projects - ETS-VIII, WINDS, and STICS..- WINDSETS-VIII Nov. 13, 2008 Ryutaro Suzuki Space Communications Group New Generation Wireless Communications Research Center National Institute of Information and Communications Technology STICS
2 Research Target of Space Communications R&D History of Satellite Communication Systems ETS-VIII project / STICS project WINDS project OICETS optical experiment Reconfigurable Repeater development Recent Activity on Space Communications Projects
3 Research Target of Space Communications Broadband Satellite Communication systems High speed multimedia services to home Solving digital divide, Disaster communication Mobile Satellite Communications in any time and any place ETS-VIII, Quasi-GEO Advanced Research for future broadband communications High speed optical communications Testing advanced technology in orbit just on time GEO-Platform system
4 R&D History of Satellite Communication Systems 1950s1960s1970s1980s1990s2000s Start of Satcom R&D in Japan Tokyo Olympic Vide Transmission 1964 ATS CS First National Com. Sat. Dec CS-2,CS-3 Promotion of commercial use of sat. JCSAT Commercial Service Mar Superbird Feb WINDS Construction of a base for space information communications ETS-V Mobile Satcom Aug Commercial Service N-STAR ETS-VI Personnel comm. Aug Future Systems COMETS Advanced Mobile Feb ETS-VIII Personal Com. BS First Domestic Broadcast Sat. Apr Commercial TV Service BS-2 Expansion of Services BS-3 COMETS Advanced Broadcast Feb ETS-VIII Digital Audio 2006 High altitude /high quality World's first artificial sat. Sputnik-1 Oct ETS-VI Inter-satellite communication Aug ETS-VII Nov Feb. 23, 2008 Dec. 18, 2006 Ultra high-speed optical communications Ultra high-speed Internet Sat. Space Highway From Mobile to Personal Advanced Broadcast Sat.-to-sat. space link Cluster Sat research Orbital remote inspection New space communication infrastructure Formation flight Geostationary platform Quasi-Zenith Sat. High altitude communications High precision positioning LEO System NeLS Global Communications OICETS Laser Com. G-bit Laser Satcom DRTS Sep. 2002
5 Research Target of Space Communications R&D History of Satellite Communication Systems ETS-VIII project / STICS project WINDS project OICETS optical experiment Reconfigurable Repeater development Recent Activity on Space Communications Projects
6 Engineering Test Satellite VIII (ETS-VIII) 3 ton class satellite bus technology S-band deployable large reflector Advanced mobile Satellite Communications experiments: On-board Switch Ranging and Positioning experiment: High Accuracy Clock 3 beams are installed in ETS-VIII Launched on Dec.18, 2006 #1 #2 #3 #4 #5
7 Service Image of Advanced Mobile Communication Phased array feeder for large reflector antenna Onboard Signal Processor Satellite Phone
8 Ka Feeder Link Satellite Onboard Switch BFN & PS Malfunctions LNA Power Line Harness S-band Feeder Link NICT JAXA NTT Ka-band D/C High Accuracy Time Exchange Reflector 13 m Phased Array Feeder PIM-LNA ・・・・・・ S-band Service Link ・・・・・・ High Accuracy Freq. Standard High Accuracy Clock / RF unit L/S-band HAC Antenna 1 m S-band U/C, D/C Data Mode TRX Voice Mode TRX RX BFN2 RX BFN1 LNA PS LNA 31 units SW TX BFN2 TX BFN1 SW Ka LNA Ka TWTA SSPA 31units Block diagram of ETS-VIII Ka-band Antenna ( 0.8 m ) EIRP < 46 dBW G/T < 14 dBK S-band Backup Rx-antenna (1m ) G/T < -6 dBK S-band Tx-antenna ( 13 m ) EIRP < 63.8 dBW
9 Ka-band feeder link earth station S-band fixed station S-band mobile earth station Telemetry/Command system Ka-band feeder link earth station (antenna)Ka-band feeder link earth station (RF section) S-band phased array antenna for automobiles Development of ground testing devices
10 Handheld Terminal for Voice Communication for ETS-VIII Size: 58 mm (W) x 170 mm (D) x 37.5 mm (H) Weight:: 266 g (without battery) Because of LNA trouble of ETS-VIII, additional high gain transmission antenna should be needed to perform the experiments using Handheld terminals.
11 Uplink Improvement by using Digital Repeater Unit EIRP: 0.2 dBW G/T: dB/K 7 dBi (Patch Antenna) 60 cm Parabolic Antenna Gain: 21.5 dBi EIRP: 29.0 dBW G/T: -7.3 dB/K Antenna Gain: 21.3 dBi HAC Antenna (RX) NICT Handheld Terminal Digital Repeater Unit ETS-VIII uplink trouble was recovered by developing a digital repeater unit which receive the signal from the Handheld terminal and re-transmit to ETS-VIII by using 60 cm antenna.
12 DVB-SH Transmission Experiment by ESA ETS-VIII DVB-SH signal Satellite / Terrestrial Integration Experiment was carried out by using ETS-VIII. Base stations were installed in NICT, Sky Tower, and JVC factory. Sky Tower NICT Kashima NICT Koganei JVC Hachioji factory Mobile Test Van S-band Ku-band Ka-band
13 R&D of STICS （ Satellite/Terrestrial Integrated mobile Communication System ） The cellular phone doesn‘t reach in the mountainous area, the island, and the sea. Moreover, the cellular phone cannot occasionally be used because of the disasters such as earthquakes and typhoons by the damage of the base stations. In NICT, new R&D of the satellite/terrestrial integrated mobile communication system is started which is effective even at such situations. This system is called STICS (Satellite/Terrestrial Integrated mobile Communication System) Communication is available both via satellite via terrestrial
14 Technological Study Items of STICS Satellite gateway Dynamic network control equipment Service Link Geostationary Satellite Ground cell Feeder Link Terrestrial gateway Hotspot WLAN base station Network Satellite Cell Terrestrial base station Technological items 1. Frequency sharing technology between satellite and terrestrial systems Cooperative frequency control technology Dynamic network control technology 1. Frequency sharing technology between satellite and terrestrial systems Cooperative frequency control technology Dynamic network control technology 2. Interference avoidance and frequency allocation technology between satellite and terrestrial systems Anti-saturation amplifier technology Low sidelobe technology Super multi beam forming technology Resource allocation technology 2. Interference avoidance and frequency allocation technology between satellite and terrestrial systems Anti-saturation amplifier technology Low sidelobe technology Super multi beam forming technology Resource allocation technology Base Stations for feeder link
15 R&D for frequency sharing technology between satellite and terrestrial systems Frequency sharing technology Cooperative frequency control technology Dynamic network control technology Technology to improve the channel capacity, which control the communication resource* between satellite and terrestrial systems dynamically according to traffic distribution and variation. Network technology to control the resource dynamically and unity depend on the traffic between satellite and terrestrial systems. *communication resource, frequency, time, power and space IMT-2000 MSS: Mobile Satellite Services UPDown MHz Service link MSS
16 R&D for Interference avoidance and frequency allocation technology between satellite and terrestrial systems Anti-Saturation amplifier technology Low sidelobe technology Super multi beam forming technology Resource allocation technology f4 f3 f2 f1 Network Satellite control equipment Terrestrial control equipment Terrestrial base station Feeder link station Satellite Terrestrial cell or Desired satellite cell Beam pattern of desired satellite cell Terminal Base station Terrestrial terminal Base station Satellite terminal Adjacent satellite cell Satellite (GSO) Same frequency interference from terrestrial system at adjacent satellite cell Space guard band Same frequency interference from terrestrial system at adjacent satellite cell Desired wave
17 Research Target of Space Communications R&D History of Satellite Communication Systems ETS-VIII project / STICS project WINDS project OICETS optical experiment Reconfigurable Repeater development Recent Activity on Space Communications Projects
18 Features of WINDS 1.2 Gbps high speed satellite communication 155 Mbps broadband satellite communication for home Wide service area: Asia and Pacific region To resolve digital divide Contribution to digital divide 0% in Japan Contribution to resolving digital divide in Asia and Pacific region Disaster management satellite communication Back up of backbone (1.2Gbps ) High definition image transmission from disaster area using portable USAT (antenna size : 45cmφ) Multicast service SHV (Super High Vision) distribution Telemedicine e-learning Purpose of WINDS
19 WINDS broadband satellite communication experiments
20 History of The WINDS Gigabit Satellite R&D - Expansion of Broadband Networks - Collaborations among Asia-Pacific nations - Contribution to disaster mitigation R&D of key technologies - Onboard processing & switching - Scanning spot beam antenna - Development of new technology verification - Application demonstrations WINDS Key technology development - Onboard switch (ABS) - Active phased array antenna (APAA) - Multi-port amplifier (MPA) - High speed burst modem CRL ( ) JAXA/NICT ( ) Ka-band Scanning Spot Beam Antennas On-board Switch
21 Development Schedule of The WINDS Launched on Feb. 23, 2008
22 Unique Features of The WINDS Very high data rate Wide bandwidth (1.1 GHz) High power multi-port amplifier (MPA) High gain spot beam antenna Very high data rate burst modem Flexible and wide coverage Active phased array antenna (APAA) Fixed multi-beam antenna (MBA) Rain attenuation compensation Flexible power allocation by MPA Internet connectivity Advanced baseband switch (ABS)
23 External view of WINDS Multi-beam antenna reflector for domestic coverage (2.4 m) Multi-beam antenna reflector for S.E. Asia coverage (2.4 m) 2.4- ton satellite bus Ka-band active phased array antenna (APAA) Rx APAA Tx APAA 650mm 540mm 470mm 290mm APAA Total EIRP: 54.6 dBW (1-beam transmission) 52.1 dBW (2-beam transmission) G/T: 7.1 dB/K by courtesy of JAXA
24 Fixed beams cover Japan and several South East Asian areas. APAA Scanning beams cover almost all areas visible from WINDS.` qqqqqqqqqqqqqq =0 Coverage of WINDS Hawaii can be covered by using APAA
25 Ground Terminals / Data Communication Rate ※： by NICT Bent-pipe ~622Mbps LET >5m SDR-VSAT 2.4m USAT 45cm ABS ＊ DEM/ ATMS/ MOD D/LWINDSU/L HDR-VSAT 1.2m USAT 45cm Mbps 155Mbps 1.5~155Mbps 155Mbps SDR-VSAT 2.4m LET >5m HDR-VSAT 1.2m
26 High-speed network earth stations SDR-VSAT: Super high data rate-VSAT SDR-VSAT 4.8 m antenna of LET
27 Results of 622 Mbps transmission test
28 Experiment plan using WINDS Basic Experiments –Satellite developing organization (JAXA and NICT) plans and carry out Application Experiments –MIC invited public proposals –53 experiments were adopted (30 international experiments) Tele-medicine, E-learning, Propagation, etc
29 Trunk Line Connection Experiment with Terrestrial Network Technical purpose To verify the compatibility between terrestrial IP network and satellite link (to examine the countermeasure against the degradation of throughput due to delay in the satellite link) 1.2Gbps high speed satellite link is connected with terrestrial network and is used as backbone link.
30 Access Link Connection Experiment with Terrestrial Network Assuming the disaster, users connect to USAT via wireless LAN and communicate with Internet using WINDS.
31 NHK’s Super High Vision transmission experiment This experiment uses the maximum performance of 1.2Gbps by using bent-pipe transponder. The data rate of SHV (Super High Vision) is 16 times ( 4 x 4 ) of normal high definition video images. The raw data rate of SHV is 24Gbps. →The SHV signal is compressed to 150~1,000 Mbps for transmission.
32 Research Target of Space Communications R&D History of Satellite Communication Systems ETS-VIII project / STICS project WINDS project OICETS optical experiment Reconfigurable Repeater development Recent Activity on Space Communications Projects
33 Multi-10 Gbps class optical space communications Quantum Communication experiment between ISS and Ground stations Inter satellite link ( GEO - LEO, LEO – LEO ) High speed feeder link for satellite communications Mechanical Tracking Equipment Laser Tracking Trial for Optical Comm. using HAPS Optical Space Communications (Research phase)
34 NICT OGS Wavelength: 800 nm-band Output power at aperture - OGS: 10mW - OICETS: 53mW Optical terminal OICETS (Kirari) OICETS - Ground Laser Communication Experiments Optical communication experiments between OICETS and NICT Optical Ground Station (OGS) were conducted in 2006 and To improve uplink and downlink performance under atmospheric turbulence, LDPC coding technology with multi-beam transmission are employed. Photo of uplink/downlink Laser communications Laser from OICETS Laser from NICT OGS Moon Beam width of the OICETS laser is around 5 m.
35 Research Target of Space Communications R&D History of Satellite Communication Systems ETS-VIII project / STICS project WINDS project OICETS optical experiment Reconfigurable Repeater development Recent Activity on Space Communications Projects
36 Objectives of SDR type Transponder (Research phase) 1.Technological demonstration of onboard software-defined radio system –Versatile onboard modulator and demodulator (MODEM) with SDR technique. –application proof of highly functional onboard transponder. –application proof for next-generation communication satellite. –Adaptable to latest communications technology with flexible link design and high data rate. 2.Gracefully degradable equipment with functional redundant technique –Reliability enhancement of onboard MODEM with software-defined radio flexibility. –Introducing a soft fault decision process (multilevel, not “hard decision”) for extending mission equipment lifetime (autonomous fault decision and resource evaluation). –Reducing redundancy by assigning a light load to partially “out of order” equipment with taking account of a required computational complexity disequilibrium in an onboard MODEM. 3.Test bed in Orbit –The architecture and the information for the OSDR programming will be opened.
37 “TDMA”: Time Division Multiple Application All in one with RECONFIGURATION Mesh type connection Baseband switching and Regenerative relay Broadcasting, One way star type Emergency communication system Onboard Web server system Layer 3 switching + onboard PEP “Adaptive communication” mod/demod, codec, protocol and termination layer
38 Conclusions NICT R&D items Development of the Gbps-class ultra-high speed satellite communications system Development of next-generation mobile communications Research of the millimeter wave / optical high-speed transmission system Research of the fundamental technologies to improve reliability and/or flexibility of satellite communications systems Projects WINDS development ETS-V, ETS-VIII developments STICS project ETS-VI, COMETS: millimeter OICETS optical experiment Reconfigurable Repeater development