1. ARIB Standards Development for Broadband Wireless Access systems
DOCUMENT #:
GSC13-GRSC6-14
FOR:
Information
SOURCE:
ARIB
AGENDA ITEM:
GRSC-6 4.2
CONTACT(S):
ARIB Standards Development for Broadband Wireless Access systems
Submission Date: July 1, 2008

2. Highlight of Current Activities (1)
Broadband Wireless Access (BWA) Sub-committee consists of four working groups in ARIB. They mainly assume a role in producing national standards for WiMAX, Next Generation PHS and IEEE referring to relevant international standards.
International Relations WG
To establish coordination framework with relevant international standardization bodies
WiMAX WG
To develop ARIB standard for mobile WiMAX system and to liaise with relevant international standard bodies
Next Generation PHS WG
To develop ARIB standard for Next Generation PHS system and to liaise with relevant international standardization body WG
To develop ARIB standard for IEEE TDD Wideband and 625k-MC Modes and to liaise with relevant international standardization body

3. Highlight of Current Activities (2)
Development of standards
Standards consist of national regulatory requirements specified in MIC Ordinance Regulating Radio Equipment and international technical requirements standardized by international standard bodies.
WiMAX and Next Generation PHS standards were produced under the following titles.
STD T-94 OFDMA Broadband Mobile Wireless Access System (WiMAX applied in Japan)
STD T-95 OFDMA Broadband Wireless Access System (Next Generation PHS)
Standardization of is being developed in line with the international standard by IEEE Working Group.
Liaison with International standardization organizations
ARIB established the liaisons with the following organizations on reproducing their standards into ARIB standards.
WiMAX Forum and IEEE WG for WiMAX standard
PHS MOU for Next Generation PHS standard

4. Strategic Direction
ARIB standards are developed in line with international standards as much as possible and the national regulatory requirements are incorporated into the standards as mandatory requirements.
In case of inconsistency between national and international requirements, national requirements must prevail.
ARIB agrees with relevant international standard organizations on reproducing their standard documents into ARIB standards under the following conditions.
International standard documents are reproduced to ARIB standard on an as is basis.
ARIB is allowed to copy and distribute the standards through its website or by photocopy.
International standard organizations disclaims all warranties in relation to use of their documents.

5. Challenges
As for WiMAX standard there is a need to compile international standards since they were developed by two different organizations. IEEE defines PHY and MAC layer specifications, while WiMAX Forum works on profiling the IEEE specifications and developing the upper layer network architecture.
Reproduction of IEEE documents in ARIB standard is subject to consent made between ARIB and IEEE.
ARIB needs to follow future updates of international standard documents and to revise ARIB standards accordingly.
There is concern that discrepancies between national regulatory requirements and international standards exist.

6. Next Steps/Actions
WG plans to complete development of ARIB standard titled as Mobile Broadband Wireless Access Systems (IEEE ™ TDD Wideband and 625k-MC Modes Application in Japan).
ARIB standards STD-94 and STD-95 are maintained and updated in the event that the referenced international standards are modified.

7. Proposed Resolution [optional]

8. Supplemental Slides

9. Advanced Wireless Communications Study Committee (ADWICS) of ARIB
Objectives
- To conduct technical studies on IMT-2000,IMT-Advanced and Broadband Wireless Access (BWA)
- To contribute to the global standardization
- Study on Technical Aspects of above three areas
- Prepare for Standard Proposals
- Contribute to Standardization at ITU
- Take Cooperation with Standardization Bodies Overseas
Missions
(Effective on April 1, 2006)
Advanced Wireless Communications
Study Committee
Steering Committee
BWA Subcommittee
IMT-Advanced Subcommittee
IMT Partnership Subcommittee

10. International Relations WG Next-Generation PHS WG
BWA Subcommittee
Scope of Work
The BWA Subcommittee has been established so as to study technologies on broadband wireless access (BWA) systems and standardize their technical specifications as ARIB Standards.
Currently target systems are broadband wireless access systems in the 2.5 GHz band of which technical conditions have been studied by Telecommunications Council.
Technologies under Study
Mobile WiMAX (based on IEEE Standard amended by e-2005)
Mobile Broadband Wireless Access (based on IEEE Standard) - Wideband Mode k-MC Mode
Next-Generation PHS (based on PHS MoU Group Standard)
BWA Subcommittee
International Relations WG
WiMAX WG WG
Next-Generation PHS WG

11. Introduction of BWA (Mobile Application) in Japan
May : MIC decided Radio Regulation
July : MIC decided License Policy
September : MIC started to receive license application
December : Two operators were licensed *
Mobile BWA
Mobile BWA
G.B.
G.B.
FWA
G.B.
G.B.
2535MHz
2575
2595
2625
2630
Total 10MHz
*: Limited operation allowed until the end of 2014 within 2545MHz MHz.

12. Main parameters of WiMAX/Next-Generation PHS
Mobile WiMAX
Next Generation PHS
Duplexing
TDD
TDD
Multiple Access
OFDM / OFDMA
OFDMA / TDMA BS
BPSK, QPSK, 16QAM, 64QAM
BPSK, QPSK, 16QAM, 64QAM, 256QAM
Modulation MS
QPSK, 16QAM
3.65 ms, 3.55 ms, 3.45 ms, 3.35 ms, 3.25 ms, 3.15 ms, 3.05 ms, 2.95 ms, 2.85 ms, 2.75 ms, BS
2.5 ms (same as PHS)
Transmission Burst Length
1.35 ms, 1.45 ms, 1.55 ms, 1.65 ms, 1.75 ms, 1.85 ms, 1.95 ms, 2.05 ms, 2.15 ms, 2.25 ms
2.5 ms (same as PHS) MS
2.4 MHz, 4.8 MHz, 9.6 MHz
System Bandwidth
5 MHz, 10 MHz
Sub-Carrier Frequency Spacing
10.94 kHz
37.5 kHz
OFDM Symbol Duration
102.9 μs
30.00 μs
Transmission
Power BS
20 W ≤
10 W ≤ MS
200 mW ≤
200 mW ≤
Antenna
Gain BS
17 dBi ≤
12 dBi ≤ MS
2 dBi ≤
4 dBi ≤