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

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 IEEE802.20 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 802.20 WG To develop ARIB standard for IEEE802.20 TDD Wideband and 625k-MC Modes and to liaise with relevant international standardization body

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 802.20 is being developed in line with the international standard by IEEE802.20 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 IEEE802.16 WG for WiMAX standard PHS MOU for Next Generation PHS standard

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.

Challenges As for WiMAX standard there is a need to compile international standards since they were developed by two different organizations. IEEE802.16 defines PHY and MAC layer specifications, while WiMAX Forum works on profiling the IEEE802.16 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.

Next Steps/Actions 802.20 WG plans to complete development of ARIB standard titled as Mobile Broadband Wireless Access Systems (IEEE 802.20™ 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.

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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

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 802.16-2004 Standard amended by 802.16e-2005) Mobile Broadband Wireless Access (based on IEEE 802.20 Standard) - Wideband Mode - 625k-MC Mode Next-Generation PHS (based on PHS MoU Group Standard) BWA Subcommittee International Relations WG WiMAX WG 802.20 WG Next-Generation PHS WG

Introduction of BWA (Mobile Application) in Japan May 2007 : MIC decided Radio Regulation July 2007 : MIC decided License Policy September 2007 : MIC started to receive license application December 2007 : Two operators were licensed * Mobile BWA Mobile BWA G.B. G.B. FWA G.B. G.B. 2535MHz 2545 2555 2575 2595 2625 2630 Total 10MHz *: Limited operation allowed until the end of 2014 within 2545MHz - 2555MHz.

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 ≤