Oct. 25, Ho Jin Lee. Radio & Broadcasting Research Lab.

Transcription

1 HAP Application Symposium R&D on HAPs in Korea Oct. 25, 2006 Ho Jin Lee Radio & Broadcasting Research Lab. Outline I. Overview of R&D on HAPS in Korea II. Past R&D Projects Communications & Networks Platforms III. On-going R&D Projects IV. Summary

2 Overview I. Overview of R&D on HAPS in Korea II. Past R&D Projects Communications & Networks Platforms III. On-going R&D Projects IV. Summary R&D Strategies R&D Area and Role Sharing for HAPs Communications and networks : ETRI(Electronics and Telecommunications Research Institute) supported by MIC(Ministry of Information and Communication) Platforms : KARI(Korea Aerospace Research Institute) supported by MOCIE(Ministry of Commerce, Industry and Energy) Service Feasibility : ETRI, SK-Telecom Standardization of HAPS for global high speed communication ETRI (MIC) ETRI (SKT) Development of Aerostat(25m) KARI (MOICE) Analysis of Next Generation HAPS Infrastructure for Satellite/Terrestrial Network

3 R&D Roadmap on HAPs Year Service Communication Feasibility Study (ETRI, KARI, SK-Telecom) Conceptual Design & Fundamental Tech. Dev. (ETRI, KARI, SK-Telecom) Standardization & Core Tech. Dev. (including DBF) (ETRI, KARI, SK-Telecom) Service/App. (3G/4G Mobile Comm., DMB, WiBro, etc.) Feasibility Study (ETRI,SK-Telecom) Telecom) Standardization (ETRI) DBF Core Tech. Dev. Platform Low Altitude Model( ) 03) Stratospheric ( 04-05) 05) Airship Development (KARI) Tethered Aerostat Development (KARI) Outline I. Overview of R&D on HAPS in Korea II. Past R&D Projects Communications & Networks Platforms III. On-going R&D Projects IV. Summary

4 Summary (1/3) In this presentation We introduced the R&D history and achievement on the HAP/HAPS system(communication,platform) studies in Korea Also briefed about currently on-going projects On-going projects Are small and still limited to sharing studies, feasibility study, and a development of an aerostat for technical feasibility demonstration Hard to expect to be expanded until HAP competence/viability is appealed through a practical scale of demonstration for technology maturity Government and industries are going to take risks but tend to just follow up the worldwide development status and standardization In the short term ETRI will keep trying to generate the projects on the development of core communication payload technologies like DBF Multi-beam Transceiver Technology from next year It is expected that once the Aerostat succeeds to get attention of government, the Stratospheric Airship project can be resumed Summary(2/3) HAP(S) Issues we have seen and observed Commonly shared worldwide Lack of confidence in technology maturity Economic viability of business model to compete Needs solid applications No killer(niche) applications (or area) over competitive technologies Taking full advantages of features over satellite and terrestrial networks? Flexible Applications : Just Potential Investment starts from business model Government or public applications to draw attention of public Competition or Complementary, New or Replaced Infra, Integrated or standalone Where does any own or specific area of technology exist? Comm./broadcasting technologies, other services from existing technologies Pioneering HAP Specific Applications may be important HAP community needs to exploit HAP s own technologies to implement services Quickly deployable, flexible, and scalable service feature should be focused on Needs mass for spectrum and favorable regulation drive Need a market need to get the spectrum securely, to mitigate aeronautical regulations To encourage the service providers to launch into just use of ready HAP network

5 Summary(3/3) Suggestion More Solid International Cooperation Maximal efficient utilization of resource sharing, no overlapping of R&D area An international joint task force or technology platform formulation Various demonstration services/events opportunities : using a common platform International co-development program based on HAP Roadmap Growth of mass for regulation or spectrum Cooperation in standardization support in international standard bodies/meetings Niche Application Development Minimum time to HAP technology/application demonstration Niche application area : starting from Government Applications? Or solving the problems or urgent needs of existing network/service operations Involvement of network/service operators for feasibility study or BM analysis Thank you for your attention!!

6 Outline I. Overview of R&D on HAPS in Korea II. Past R&D Projects Communications & Networks Platforms III. On-going R&D Projects IV. Summary Feasibility Study(1998) Project : A Study on the Utilization of Stratospheric Telecommunication using Airship Platforms (funded by MIC) Periods : 1 Year Objectives Service Definition, System Conceptual Design, System Development Plan Technical & Economic Feasibility Study SEOUL INCHON High Speed Internet 512k ~ 2Mbps Leased Line 512k ~ 2Mbps, 2M ~ 45Mbps router Company TAEJON TAEGU Home High Speed Mobile Multimedia 64k ~ 512kbps Service Provider KWANGJU PUSAN router router Mobile Office Video Phone Mobile Multimedia Gateway Terrestrial Network (PSTN, PSDN, WWW)

7 El ev ati on (deg.) A zim uth (deg.) Level (db) Fundamental Tech. Dev.( ) Project : A Study on the Stratospheric Communication System and Technologies (funded by MIC) Periods : 3 Years Objectives : International Standardization and Key Tech. Development Horn module Controller Positioner Cross Dipole Radiation Element PC Controller 3 ADMDDC4NB DSS60QC ADP60PCI RF Subsystem 4-CH DBF MBA RF Core Technology Development( ) Stratospheric Comm. Payload Core Tech. Dev. S- & Ka-band DBF Multibeam Transceiver System V-band Multi-horn Realtime Pointing Controller Frequency Sharing Study Sharing condition with other wireless network Domestic & International Standardization Satellite Wanted Signal Interference Radio-relay system Earth Station Stratospheric Comm. Network Design Service definition Network design & performance analysis HAPS Node B RNC RAN -RNS Iur (Optional) HAPS Node B RNC RAN -RNS Ground Transpare nt Iu Feasibility Study of Mobile Comm. using HAPS (SKT) Trend analysis of mobile comm. network Network implementation & business model analysis HAPS Service area Base station Cellular service area Stratospheric Airship Operation Scenario (KARI) Airship operation scenario Takeoff/Landing scenario Height 21 Km Stratospheric Station Keeping Controlled Descent phases Air Intake Air Takeout User UE Uu Iur Ground Transpare nt Iu Terrestrial CN MSC/VLR, GMSC, SGSN, GGSN, HLR CN Wind speed 25 m/s Controlled Ascent phases Tracking & Hangar Control

8 DBF Multi-beam Antenna Technologies Characteristics Ground-to-HAPS Freq. HAPS-to-Ground Freq. Antenna gain(g max )* Antenna beam pattern 1 st sidelobe level Ka-band GHz GHz Max. 23 dbi Rec. ITU-R S G max 27.5 db S-band MHz, MHz, MHz (Region 3) 23 dbi (Max. 50 dbi) Res. 221 G max 25 db Radome 4 CH DBF MBA System CH DBF MBA System *crossed dipole type Radiation Element(73 ea) 7 panels Conf. (3.5mD x 1.1 Amplifiers mh) BFN (Diameter 1m, Height 0.5m) Conceptual DBF MBA Configuration(1 Pannel) S-band DBF MBA Technology(1/2) Specifications Receiving frequency : MHz (IMT-2000 bands) Antenna beam pattern : ITU-R Resolution 221 Number of receiving beams : 7 (tracking beams applicable) Rx data rate : 1 Mbps / beam Beam width : 24 degrees Antenna gain : about 16.5 center beam (calculated) Intermediate frequency : 3.75 MHz Antenna type : Crossed dipole (profile changeable) Number of antenna elements : CH Number of receivers : 19

9 S-band DBF MBA Technology(2/2) Radiation Beam Pattern according to the amplitude distribution 0-10 Taper amplitude distribution Uniform amplitude distribution E, db s -20 u S2 S deg. S2 section Scan angle(s2 section) : ±18 Ka-band DBF MBA Technology(1/2) Specification Receiving frequency : GHz Antenna beam pattern : array using Flat Topped Element Pattern (FTEP) Number of receiving beams : 7 (tracking beams applicable) Rx data rate : 1 Mbps / beam Beam width : about 15 degrees Intermediate frequency : 3.75 MHz Antenna type : Dielectric Rod(DR) or Stacked Disc Number of elements : 37 (19 active, 18 passive) Number of receivers : CH <DR> <Disc>

10 Ka-band DBF MBA Technology(2/2) E, db -20 E, db deg. Normal beam, calculated Normal beam, measured Beam, minus 10 deg., calculated Beam, minus 10 deg., measured Beam, plus 10 deg., calculated Beam, plus 10 deg., measured DR type deg. Normal beam, calculated Normal beam, measured Beam, minus 10 deg., calculated Beam, minus 10 deg., measured Beam, plus 10 deg., calculated Beam, plus 10 deg., measured Disc type Standardization on Frequency Sharing Achievements on Technical Issues Evaluation method of separation distance between HAPS and terrestrial network according to C/I in IMT-2000 system : adopted as ITU-R New Recommendation in 2002 (WP8F) Evaluation method of interference analysis from HAPS downlink to FSS uplink according to C/I in the band GHz : adopted as PDRR in 2005 (WP4-9S) Methodology for interference analysis from HAPS to RRS above 3 GHz : adopted as ITU-R New Recommendation in 2006 (WP9B) Achievements on Regulatory Issues Information summit procedure of HAPS for IMT-2000 : adopted as modified Res. 221 in WRC-2003

11 Stratospheric Airship Development Plan Phase 3 : Practical Model Phase 2 ( 04-07) : Stopped in 2005 Phase 1 ( 01-03) : Completed Unmanned Airship(50m) Basic Tech. Study for Stratospheric Airship Real Time Image Tech. Evaluation Prototype for the Stratospheric Airship System Feasibility Demonstration for the Stratospheric Airship Functional Model GCS Prototyped GCS Functional Model for Low Altitude (~2003)

12 Stratospheric Airship Prototype( ) Model Name : VIA50 (Unmanned, Autonomous flight Model) Maximum Weights : 2,850 kg Volume : 4,010 m 3 Maximum Speed : 72kmph Ceiling Altitude : 5km Operating Altitude : 3km Operation Time : 3hr Electric Motor Driven Payload : Ground Observation Camera Outline I. Overview of R&D on HAPS in Korea II. Past R&D Projects Communications & Networks Platforms III. On-going R&D Projects IV. Summary

13 Feasibility Study of HAPS Applications Project : Analysis of Next Generation HAPS Infrastructure for Complement and/or Replacement of the Satellite/Terrestrial Network (funded by SKT) Periods : 4 Years (from 2005) Objectives & Scope Research on Worldwide Development Status for HAPS Feasibility Study of Service/Application for Complement and/or Replacement of the Satellite/Terrestrial Network 3G Mobile Communication(2005) WiBro : Portable Mobile Internet(2006) S-DMB/T-DMB(2007) B3G/4G Mobile Communication(2008) Research on Standardization Status for HAPS Standardization Project Project : Standardization of HAPS for global high speed communication Periods : 2 Years (from 2006) Scopes : Sharing studies and Contribution to Standards Research Items Satellite Sharing & Interference Mitigation Sharing with other wireless network Interference mitigation techniques Transmission standards Domestic and International Standardization Activities Domestic Standardization Activity International Standardization Activity for WRC-2007 Agenda Item 1.8(APT, ITU-R, WRC, etc.) RRS Nadir Service Areas of HAPS Earth Station Wanted Signal Interfered Signal

14 Standardization Project Contributions Methodology of determining the power level for HAPS ground stations to facilitate the sharing with FSS space receivers : adopted as PDNR in 2006 (WP4-9S) Regulatory procedure for V- & Ka-band : being considered in ITU-R Tethered Aerostat Development( ) Aerostat Envelope, Ballonet, Pressurization System, Mission Payload, etc. Tether Cable Aerostat Grounding Power Supply and Data Communication Umbilical Cable Helium Gas filled Ground Support System Mooring System Trailer Power(Electric) Generator Aerostat Control and Mission Payload Operation

15 Tethered Aerostat Development( ) Target Specification Aerostat Size(Length) Operational Altitude Payload Mass Duration of the Flight Limit of the Wind Speed : 25m : 3,000 ft : 300 kg : 10 days : 23 m/sec Ascending & Descending Speed : 1.0 m/sec Transportable Mooring System Mission Payload - Camera, Radar, Radio Monitoring Equipment, etc)