Jeju, 13 – 16 May 2013Standards for Shared ICT Activities of Wireless LAN Systems R&D Group in ARIB Kohei SATOH Managing Director, ARIB Document No: GSC17-GRSC10-02 Source: ARIB Contact: Kohei SATO H GSC Session: GRSC10 Agenda Item: 4.1

GSC17-GRSC10-02 GSC-17, Jeju / Korea Standards for Shared ICT 2 Highlight of Current Activities (1) - Background - In Japan, the rapid spread of smart phones is causing cellular network congestion. One solution is traffic offload by WLAN. However, problems caused by interference between WLANs due to the spread of WLAN is becoming apparent in public areas such as train stations, and dense residential areas such as apartments. Activities to develop solutions to the problems of WLAN and to spread the solutions widely by standardization are desired.

GSC17-GRSC10-02 GSC-17, Jeju / Korea Standards for Shared ICT 3 Highlight of Current Activities (2) - WLAN Systems R&D Group - To research and development for the advancement and improvement of the reliability of WLAN systems, to carry out standardization activities, and to make collaboration with other standards bodies and organizations. Date of establishment: April 1 st in 2013 Participants: More than 20 companies (members of ARIB: WLAN manufacturers, System integrators, Telecom carriers, etc.)

GSC17-GRSC10-02 GSC-17, Jeju / Korea Standards for Shared ICT 4 Highlight of Current Activities (3) - Organization of ARIB - General Assembly Board of Directors Chairman Members Secretariat Auditors Standard Council Standard Assembly Technical Committee Advanced Wireless Communications Study Committee Electromagnetic Environment Committee Promotion Strategy Committee Management Strategy Committee Management Committee Study Group R&D Group Wireless LAN Systems Group

GSC17-GRSC10-02 GSC-17, Jeju / Korea Standards for Shared ICT 5 Highlight of Current Activities (4) - Main topics - Interference mitigation techniques User experience improvement techniques Update of radio equipment conformity certification program ProblemsExamples of solutionsExamples of outputs Interference between WLANs due to rapid increase of active WLAN access points (APs) for public WLAN services and home networks. ・ Promotion of multi-user MIMO technique. ・ Transmission power control. ・ Channel assignment based on network control. ・ Trial test ・ ARIB standard ・ Proposal for Wi-Fi certification programs ・ Standardization of multiple access technique with robustness against interference (Channel frequency control, Spatial resource management ） ・ Proposal of evaluation models to IEEE ProblemsExamples of solutionsExamples of outputs Measurement of ultra-small radio equipment without using a measurement terminal. ・ Revision of technical standard suitable for radiometry measurement. ・ Proposal for regulation revision ProblemsExamples of solutionsExamples of outputs Unstable WLAN connection at public area such as train stations and city streets in downtown. ・ Field measurement. ・ Development of comparison criteria. ・ Visualization of service quality level. ・ Efficient transmission of low-data -rate packets. ・ Collaboration between WLAN and cellular system. ・ Trial test ・ ARIB standard ・ Proposal for Wi-Fi certification programs

GSC17-GRSC10-02 GSC-17, Jeju / Korea Standards for Shared ICT Strategic Direction - Road map - Technical evaluation Technical discussion Technical discussion Problem analysis ARIB standardization Proposal for Wi-Fi certification Trial test (short term problems) Development of evaluation model Investigation of current situation Interference mitigation techniques* Fiscal Year 2013FY 2014 Update of radio equipment conformity certification program △ Regulation revision Problem analysis Discussion at Information and communications council Technical discussion Problem analysis ARIB standardization Proposal for Wi-Fi certification Trial test （ short term problems ） Development of comparison criteria User experience improvement techniques* FY 2015FY 2016FY 2017 Technical evaluation Technical evaluation Definition of specification ARIB standardization Field measurement Testbed Field measurement 6 * Make cooperation with standardization bodies such as High Efficiency WLAN SG in IEEE WG