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MMAC Activities for Japanese 4.9GHz and 5.0GHz Bands

MMAC Activities for Japanese 4.9GHz and 5.0GHz Bands. Yasuhiko Inoue, NTT. MMAC Overview. MMAC ( M ultimedia M obile A ccess C ommunication Systems Promotion Council) An organization in the ARIB (Association of Radio Industries and Businesses). Activities:

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MMAC Activities for Japanese 4.9GHz and 5.0GHz Bands

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  1. MMAC Activities for Japanese 4.9GHz and 5.0GHz Bands Yasuhiko Inoue, NTT Y.Inoue, NTT

  2. MMAC Overview • MMAC (Multimedia Mobile Access Communication Systems Promotion Council) • An organization in the ARIB (Association of Radio Industries and Businesses). • Activities: • Investigation and study on system specifications • Demonstrative experiment • Information exchange and popularization activities, etc • Working Groups • High Speed Wireless Access • 5GHz Mobile Access (Wireless Access and Wireless LAN) • Wireless Home-Link (Wireless 1394) http://www.arib.or.jp/mmac/e/ Y.Inoue, NTT

  3. T71 Ad hoc Working Group • ARIB STD-T71 • Technical requirements and specifications for IEEE 802.11a systems to operate in Japan. • T71 Ad hoc WG has been created to revise the current ARIB STD-T71 to incorporate the technical requirements for 5GHz Band Wireless Access systems. • Chief: Mr. Noboru Matsumoto, SpeedNet • Member companies: Atheros, Canon, Denso, Fujitsu, Hitach Cable, Intel, Japan Telecom, JRC, Mitsubishi, Murata, NEC, NTT, TOYOCOM, Panasonic, Samsung, SpeedNet, TDK, Toshiba, TTNet, and more • Supposed to finish its work by the end of March Y.Inoue, NTT

  4. Activities • T71 Ad hoc WG had two meetings • Jan. 23: The 1st meeting • The drafting group was created. • The drafting group started to review current ARIB STD-T71 to find the sections to be modified. • Feb. 25: The 2nd meeting • The initial version of the draft was presented to the WG members. • Discussions: • Clarification for some texts (e.g. spurious emissions) • Channel numbering scheme, etc Y.Inoue, NTT

  5. Major Topics • Regulatory requirements include: • Frequency band and channelization • Transmit power • Spectrum mask • In-band and out-of-band spurious emission • Antenna gain • Carrier sense level • Additional specification • Channel numbering Details are summarized in 02/533r1 Y.Inoue, NTT

  6. Discussions in T71 Ad hoc WG • Technical requirements: • Radio Equipment Ordinance (EO) Article 49-21, etc • Additional specifications: • Channel numbering for between 4900 and 5000 MHz • People strongly hope to have the same expression with 802.11j on the channel numbering scheme. • Proposed scheme: 5000 4000 6000 5100 5030 4900 MHz 256 0 20 200 436 455 New Definition Defined in the IEEE 802.11a Standard Y.Inoue, NTT

  7. Requirement of the Market • Article 49-21 of Radio Equipment Ordinance allows three kinds of systems for the channel bandwidth • 20MHz: • A commercial license has been given to a service provider. • Many other service providers plan to start their services. • 10MHz: • Some ISP plan to provide FWA/NWA services. • 5MHz: • No requirements from the market • Is it really necessary to standardize this system? Y.Inoue, NTT

  8. Schedule Mar./19/: The 3rd (and final) meeting of the T71 Ad hoc WG. • The draft will be approved by the WG. Discussions by email if necessary. Apr./25(?): The draft will be fixed. May/(??): ARIB Standards Assembly. • The draft will be approved as ARIB STD-T71 ver.2. Y.Inoue, NTT

  9. Summary • MMAC T71 Ad hoc WG is finishing its work soon. • An item to be fixed: • Channel numbering scheme • The ad hoc WG will have final meeting on March 19. • The draft of T71 will be sent to the ARIB Standards Assembly to be held in May. People in T71 Ad hoc WG strongly hope to have the same expression with IEEE 802.11j on the channel numbering method. Y.Inoue, NTT

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