doc.: IEEE /0047r0 Submission July 2014 Hyunduk Kang et al, ETRISlide 1 LTE-U activities Notice: This document has been prepared to assist IEEE It is offered as a basis for discussion and is not binding on the contributing individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) reserve(s) the right to add, amend or withdraw material contained herein. Release: The contributor grants a free, irrevocable license to the IEEE to incorporate material contained in this contribution, and any modifications thereof, in the creation of an IEEE Standards publication; to copyright in the IEEE’s name any IEEE Standards publication even though it may include portions of this contribution; and at the IEEE’s sole discretion to permit others to reproduce in whole or in part the resulting IEEE Standards publication. The contributor also acknowledges and accepts that this contribution may be made public by IEEE Patent Policy and Procedures: The contributor is familiar with the IEEE 802 Patent Policy and Procedures, including the statement "IEEE standards may include the known use of patent(s), including patent applications, provided the IEEE receives assurance from the patent holder or applicant with respect to patents essential for compliance with both mandatory and optional portions of the standard." Early disclosure to the TAG of patent information that might be relevant to the standard is essential to reduce the possibility for delays in the development process and increase the likelihood that the draft publication will be approved for publication. Please notify the Chair as early as possible, in written or electronic form, if patented technology (or technology under patent application) might be incorporated into a draft standard being developed within the IEEE TAG. If you have questions, contact the IEEE Patent Committee Administrator at. Date: Authors:

doc.: IEEE /0047r0 Submission Abstract This presentation provides brief summary on LTE-U workshop held on June 2014 July 2014 Hyunduk Kang et al, ETRISlide 2

doc.: IEEE /0047r0 Submission 26 Participants worldwide Nokia, AT&T, CableLab, HiSilicon(Huawei), InterDigital, Qualcomm, China Unicom, Sony, TeliaSorena, TI, ALU, Samsung, Hitachi, Intel, CATT, Verizon, ZTE, Broadcom, KT, KDDI, Cisco, NTT Docomom, Blackberry, Fujitu, LG, T-Mobile July 2014 Hyunduk Kang et al, ETRISlide 3

doc.: IEEE /0047r0 Submission Regulatory Issues Many companies provided an overview of the regulatory requirements for unlicensed operation in 5 GHz Different regional requirements emerged, in terms of power levels, channel sensing etc. Most of the companies prefer 3GPP to focus on the standardization of a global solution that can work across regions July 2014 Hyunduk Kang et al, ETRISlide 4

doc.: IEEE /0047r0 Submission Possible Frequencies 5725~5850MHz, 5470~5725MHz and MHz (regional) July 2014 Hyunduk Kang et al, ETRISlide 5 *1 Bands allocated by Canada/Korea are MHz. *2 China MHz is shared license among operators, open for WAS and RLAN *3 36dBm and outdoor is only permitted in US

doc.: IEEE /0047r0 Submission Deployment model & modes of operation Indoor and Outdoor CA / DC / standalone –1 st priority: LAA CA with both SDL and TDD –2 nd priority: LAA DC –3 rd priority: Standalone (might be the next work item) July 2014 Hyunduk Kang et al, ETRISlide 6

doc.: IEEE /0047r0 Submission LAA (Licensed-Assisted Access) LAA on unlicensed band is always combined with licensed band LTE Licensed band: either FDD or TDD –provides reliable connection for mobility, signaling, voice and data LAA: either TDD or SDL (Supplement Down Link) –boosts data rates with good enough signal (opportunistic use) July 2014 Hyunduk Kang et al, ETRISlide 7

doc.: IEEE /0047r0 Submission Coexistence Coexistence is a fundamental requirement for all networks and all users within unlicensed bands to be successful Coexistence among LTE-U and other technology networks needs to be mandatory –A global standard is required July 2014 Hyunduk Kang et al, ETRISlide 8

doc.: IEEE /0047r0 Submission High Level Coexistence Requirements Fairness –In time –In spectrum width A single solution must meet all regional regulatory requirements –e.g., Listen Before Talk Must support multiple LTE-U networks and multiple Wi-Fi networks in the same band Coexistence with existing services July 2014 Hyunduk Kang et al, ETRISlide 9

doc.: IEEE /0047r0 Submission Coexistence Use Cases LTE-U vs. unmanaged Wi-Fi (1) LTE-U vs. managed Wi-Fi (2) LTE-U vs. LTE-U among difference operators (3) July 2014 Hyunduk Kang et al, ETRISlide 10

doc.: IEEE /0047r0 Submission Suggested Solutions for Coexistence with Wi-Fi LBT and fairness algorithm Good neighbor policy - do not make legacy systems unusable LBT and high level coexistence Carrier selection, TDD fake + LBT Fairness metric Protocol/Architecture level + LBT DFS + LBT LBT like method, virtual carrier sensing LBT (CSMA/CA, CCA) Channel selection mechanism LBT based on ED, NW assistance information LBT required / LBT not required July 2014 Hyunduk Kang et al, ETRISlide 11

doc.: IEEE /0047r0 Submission References LTE-U Workshop documents (June 2014) July 2014 Hyunduk Kang et al, ETRISlide 12