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MMAC T71 Ad hoc WG Liaison Report

Overview of the MMAC organization and its activities, specifically the T71 Ad Hoc Working Group's revision of the current ARIB STD-T71 to incorporate technical requirements for 5GHz Band Wireless Access systems.

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MMAC T71 Ad hoc WG Liaison Report

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  1. MMAC T71 Ad hoc WGLiaison Report 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. • Chair: 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. What’s in the draft? • Technical Requirement • Frequency Plan & Channelization • Radio Equipment Ordinance Article 49-21: (5GHz Band Wireless Access Systems) • 20MHz/channel, 10MHz/channel, 5MHz/channel • Transmit power, Spectrum mask, Spurious emission, etc • Open Issue • Channel Numbering Method • Currently, we have 1 proposal. But not adopted in the draft. • T71 Ad hoc strongly hope to have the same mechanism with TGj. • Chair of T71 Ad hoc sent an e-mail to ask for review of TGj draft. Y.Inoue, NTT

  6. 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 must be fixed. • May/(??): ARIB Standards Assembly. • The draft will be approved as ARIB STD-T71 ver.2. Ad hoc WG will be created again for further revisions Y.Inoue, NTT

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