1. MMAC Activities for Japanese 4.9GHz and 5.0GHz Bands
March 2003
MMAC Activities for Japanese 4.9GHz and 5.0GHz Bands
Yasuhiko Inoue, NTT
Y.Inoue, NTT

2. March 2003
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)
Y.Inoue, NTT

3. T71 Ad hoc Working Group ARIB STD-T71
March 2003
T71 Ad hoc Working Group
ARIB STD-T71
Technical requirements and specifications for IEEE a 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
March 2003
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: Additional specification
March 2003
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
March 2003
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 j on the channel numbering scheme.
Proposed scheme:
4000
5000
6000
4900
5030
5100
MHz
256 20
200
436
455
New Definition
Defined in the IEEE a Standard
Y.Inoue, NTT

7. Requirement of the Market
March 2003
Requirement of the Market
Article 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.
March 2003
Schedule
Mar./19/: The 3rd (and final) meeting of the T71 Ad hoc WG.
The draft will be approved by the WG.
Discussions by 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.
March 2003
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 j on the channel numbering method.
Y.Inoue, NTT