Study Group 8 Seminar on Tomorrows Technological Innovations Related to WRC-07 Session 3 : Working Party 8D Introduction Overview of Activities in Working Party 8D Trend of New Technology Development in Mobile Satellite Service (MSS) and Radionavigation Satellite Service (RNSS) 9 September 2004 Takeshi Mizuike (KDDI Corporation, Japan) Chairman, WP 8D

ITU-R Activities To Support Development of MSS and RNSS New technology development Nongeostationary satellites CDMA Advanced GSO satellites (Deployable antenna) User needs for new applications Portable and handheld terminals IP and high-speed data transmission Requirements for new spectrum allocations Criteria for frequency sharing and coordination Technical and operational characteristics Development of Recommendations Studies for CPM preparation Decisions by WRC Contribution of WP 8D in the areas of MSS and RNSS

Voice, Facsimile, Telex ISDN, High Speed Data (~64kbps) IP and broadband applications Global coverage Useful for maritime and aeronautical applications Frequency sharing with other Services System development cost Technical and Operational Properties of MSS and RNSS Development of New Applications GMDSS AMS(R)S Distress and Safety Services Maritime MSS Ship-borne ES Aeronautical MSS Aeronautical ES Land MSS Portable ES & Handheld terminal

Trend of Technology Development in MSS GSO MSS in bands 1.5/1.6GHz, 2.5/2.6GHz MMSS AMSS & LMSS Generic Allocation (WRC-97) GSO in 14GHz band Secondary allocation for MSS (E-to-s) Including AMSS (WRC-03) Advanced GSO In 1.5/1.6GHz band Handheld MES for voice Portable MES for high speed data Broadband (IP) applications High performance GSO MSS NGSO MSS Below 1GHz (LEO) for data 1-3GHz (LEO & MEO) for voice and data Use of Nongeostationary satellites

Non-geostationary satellites Small transmission delay and propagation loss Global coverage Complicated system control (Satellite hand-over) LEO and MEO in 1-3GHz band (Mobile phone by satellite) Use of TDMA and CDMA Frequency allocation for Service and Feeder Links (WRC-92, WRC-95, WRC-97) Frequency sharing studies by WP 8D LEO below 1GHz (Data applications) Frequency sharing with terrestrial services such as MS (DCAAS) Studies for additional allocation (Res. 214) : No allocation (WRC-03) Feeder link in 1.4GHz band for NGSO MSS below 1GHz Secondary allocation (WRC-03) Compatibility studies (Res. 745) for WRC-07 Agenda item 1.17 New Technology Development of MSS

Advanced GSO MSS satellites Large deployable antenna Beam forming and Multiple spot beams High e.i.r.p. and G/T Hand-held terminal (Mobile phone by satellite) High speed data applications by portable terminal Coverage for hot-spot (Global coverage by NGSO satellites) Needs for more spectrum allocation Additional allocation : 7MHz in 1.5/1.6GHz bands (WRC-03) Sharing studies with other services Agenda item 1.7 (Res. 744) (WRC-07)

New Technology Development of MSS Broadband applications in MSS IP applications (Internet access from everywhere) Broadband applications : Requirement for a wider spectrum range GHz band :Secondary allocation for MSS (E-to-s) including AMSS (WRC-03) Modernization of civil aviation telecommunication systems Study of current satellite frequency allocations Agenda item 1.6 (Res. 415) (WRC-07) Technical Characteristics of MES GMPCS MoU NGSO MSS MES : Recommendation ITU-R M.1343 GSO MSS MES : Recommendation ITU-R M.1480 Compatibility with other services in adjacent frequency bands

IMT-2000 Satellite Component Radio Interface : Rec. ITU-R M.1457 (RA-2000) and its Revisions Satellite component : Responsibility of WP 8D in close coordination with WP 8F Initial spectrum allocation in 2GHz band Additional frequency identification by WRC-2000 Agenda item 1.9 (WRC-07) : Studies underway at JTG6-8-9 Sharing and adjacent band compatibility in 2.5GHz band between the terrestrial and satellite components of IMT-2000 Studies by JCG8F-8D : Draft new Report New applications : Broadcast and Multicast by satellite

New Generation Systems of RNSS Currently operating RNSS systems MHz and MHz bands Use of NGSO satellites Global positioning capability One of the most suitable applications of satellites (No other means for precise positioning and global coverage) Needs for new spectrum allocations for the next generation systems Additional allocations (WRC-2000) Studies for sharing with other services and system coordination Agenda item 1.15 (WRC-03)

Current Activities of WP 8D Studies on 20 Questions of ITU-R Responsible Group for WRC-07 Agenda items Agenda item 1.6 (Resolution 415) Agenda item 1.7 (Resolution 744) Agenda item 1.17 (Resolution 745) Sub-working group structure SWG 8D1 : MSS system concepts, Technical characteristics, Performance objective SWG 8D2 : IMT-2000 satellite component, Sharing within MSS SWG 8D3 : Sharing with other services (FS, MS, BS, space science services) SWG 8D4 : Radionavigation Satellite Service, Feeder link

Study Group 8 Seminar Program of Session 3 for Working Party 8D 3.1Introduction by WP 8D Chairman Mr. Takeshi Mizuike (KDDI Corporation, Japan) 3.2Overview of new technology trends in the mobile satellite service Mr. Marcus Vilaca (Inmarsat, UK) 3.3Satellite digital multimedia broadcast Mr. Laurent Combelles (Alcatel, France) 3.4Satellite systems supporting modernization of civil aviation telecommunication systems Mr. David Weinreich (Boeing, USA) Questions and Answers