THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Mar.; 29(3),

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1 THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Mar.; 29(3), ISSN (Print) ISSN X (Online) Study on the Introduction of Spectrum Policy to Revitalize the Domestic Spectrum Sharing 최주평 이원철 Joo-Pyoung Choi Won-Cheol Lee* 요약 CBRS(Citizens Broadband Radio Service) (framework for spectrum sharing) GHz.,,,,.,,. Abstract Herein, we survey the current state of the recent legal revision of the Citizens Broadband Radio Service, a type of city spectrum-sharing service used in the United States of America, and the introduction of spectrum sharing in the frequency ranging from GHz, based on the United Kingdom framework for spectrum sharing. Specifically, the subjects of topical interest, including the radio station licensing of the spectrum-sharing service system face-to-face multitier user structure, regional frequency allocation, and applicable service types, are discussed. Furthermore, factors to be considered while selecting candidate channels for joint use are suggested, emphasizing their importance for introducing spectrum sharing in Korea and revitalizing the related industrial sectors. In addition, methods of introducing a radio station license system for spectrum sharing, techniques of introducing incentive auctions, and the types of services where spectrum sharing is applicable are discussed. Key words: Spectrum Sharing, CBRS, Census Tract, PEA(Partial Economic Area), Secondary Market, Incentive Auction. 서론 2017 ( ) (No. 2016R1D1A1B ). (Institute of Cognitive Radio Communication, Soongsil University) * (School of Electronic Engineering, Soongsil University) Manuscript received January 23, 2018 ; Revised February 3, 2018 ; Accepted March 2, (ID No ) Corresponding Author: Won-Cheol Lee ( wlee@ssu.ac.kr) 200 c Copyright The Korean Institute of Electromagnetic Engineering and Science. All Rights Reserved.

2 그림 1. Fig. 1. Change of radio management paradigm.., ICT. PCAST (President s Council of Advisors on Science and Technology) 95 MHz [1]. 3 GHz,.,., 5G, IoT 4,, 그림 2. Fig. 2. Change of frequency usage environments.. CBRS(Citizens Broadband Radio Service).,. Ofcom(Office of Communications)..,.. 201

3 THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. vol. 29, no. 3, Mar 주파수공동사용분류체계 Ofcom UK Spectrum Policy Forum. UK Spectrum Policy Forum Airbus Defence and Space Avanti, BT, Department for Culture Media & Sport, Digital UK, Huawei, Inmarsat, Ofcom, Plum Consulting, QinetiQ, Qualcomm, Real Wireless, Sky, Telefonica, Three, Vodafone, Plum consulting (flexible spectrum access), [2]. 1. CBRS TVWS(TV White Space) 2,. 2 CBRS(GAA) 표 1. Table 1. Classification system of spectrum sharing depending on the degree of interference and access. Commons Classical sharing Light licensing, DSA LSA 표 2. Table 2. Modified classification system of spectrum sharing depending on the degree of interference and access. Commons Classical sharing Light licensing, DSA, TVWS, CBRS(GAA) LSA, CBRS(PAL) CBRS 3 (3-tier) General Authorized Access,. GAA 1 Incumbent 2 PAL(Priority Access License), 1 2. CBRS(PAL) Common Wi-Fi. Classical sharing (, M/W ),. Light licensing( ) TVWS(TV White Space), CBRS(GAA), DSA (Dynamic Spectrum Access) DB(Data Base) 1. LSA (Licensed Shared Access) CBRS(PAL) 2. 3 CBRS.. 주요국의주파수공동사용법제도추진현황. 4 TVWS,. 202

4 2016 CBRS 5G CBRS [3],[4]. LSA 3.8 4.2 GHz Framework of Spectrum Sharing [5]. 2014, 2 ( ) [6]. 6 3 [7]. 3-1 미국의 CBRS 전파규칙개정추진현황 그림 3.

Fig. 4. Internal and external policy enforcement situation for spectrum sharing. 5G,.

4 CBRS 5G CBRS [3],[4]. LSA GHz Framework of Spectrum Sharing [5]. 2014, 2 ( ) [6]. 6 3 [7]. 3-1 미국의 CBRS 전파규칙개정추진현황 그림 3. Fig. 3. Tier structure and key features depending on usage pattern of radio station. 그림 4. Fig. 4. Internal and external policy enforcement situation for spectrum sharing. 5G,. CBRS LTE 5G, T- Mobile FCC(Federal Communications Commission) CBRS [8],[9]. CBRS PAL 5G, 3.5 GHz 150 MHz PAL. PAL 10, PAL CBRS FCC CBRS CFR Part 96 ( ). FCC 2016 CBRS, 5G CBRS GHz, 5G CBRS. IMT (3GPP Band 42 Band 203

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. vol. 29, no. 3, Mar. 2018. 43( )) 3.4 3.7 GHz 5G, 2018 [10]. CBRS ( ) PAL,, PAL PEA(Partial Economic Area), 2 PAL,.

5 THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. vol. 29, no. 3, Mar ( )) GHz 5G, 2018 [10]. CBRS ( ) PAL,, PAL PEA(Partial Economic Area), 2 PAL, [4]. CBRS 6,.. 50 PAL, SAS(Spectrum Access System) PAL. PAL,. PAL, FCC, PAL. PAL, PAL 면허기간의확장, 면허재갱신가능여부 CBRS 3 PAL,. PAL 3 10, FCC PAL 3 10 PAL. 10 PAL (3, 5, 10 ), PAL 10 PAL ( population coverage geographic coverage ). population coverage. 그림 5. Fig. 5. Configuration status of census track in the United States 지역적 PAL 면허영역크기확장여부 CBRS PAL PEA 그림 6. PEA(Partial Economic Area) Fig. 6. Configuration status of PEA(Partial Economic Area) in the United States. 204

6 PAL. PAL PEA, PAL PAL 경매규칙개정, 방사전력완화관련개정 여부 CBRS 2 PAL, 7 PAL PAL., PAL 2 PAL. GAA. PAL. T-Mobile 5G America, AT&T, Ericsson, Geo Links, GSMA, Nokia, USCC PAL PAL PAL. FCC PAL, PAL PAL., PAL 경매참여및 PAL 분할허용을위한 2 차 시장규칙재개정여부 T-Mobile, Ericsson, Qualcomm, USCC, Verizon 2 PAL (disaggregation), 표 3. CBRS ( ) Table 3. Amendment of the CBRS OOB(Out of Band) emission power limit. 1 2 ( ) +40 MHz -13 dbm/mhz + 40 MHz -25 dbm/mhz -40 dbm/mhz +20 MHz -13 dbm/mhz +20 MHz 40 MHz -25 dbm/mhz 40 MHz 3,530 MHz 3,720 MHz -25 dbm/mhz 3,530 MHz 3,720 MHz -40 dbm/mhz. FCC, 2 PAL, 대역폭확대관련전파규칙개정의적합성 여부 T-Mobile 3.5 GHz CBRS PAL, PAL 70 MHz. CBSD (Citizens Broadband Service Device) (Effective Isotropically Radiated Power: EIRP). FCC EIRP SAS ESC(Environmental Sensing Capability). 205

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. vol. 29, no. 3, Mar. 2018. GAA. 3-1-6 정보공개의무규정을완화하는규칙개정여부 CBRS SAS CBSD, AT&T (,,, ). FCC SAS CBSD.

7 THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. vol. 29, no. 3, Mar GAA 정보공개의무규정을완화하는규칙개정여부 CBRS SAS CBSD, AT&T (,,, ). FCC SAS CBSD. CBRS FCC mid-band NoI(Notice of Inquiry) [11]. 3.7 GHz 24 GHz mid-band., mid-band 24 GHz 3.7 GHz. FCC mid-band GHz, GHz, GHz GHz CBRS, 600 MHz. 3-2 영국의주파수공동사용프레임워크추진현황 2014 LSA 그림 GHz Fig. 7. Frequency allocation status of GHz band in the UK (Framework for Spectrum Sharing) [12],[13] GHz (Call for Input) [5] , UK, GHz TVWS CBRS (tiered authorization approach).. (3-tier), (opportunistic spectrum access) (geographic licenses), 4.,. (Tier 1: Existing License Classes) 1 206

8 표 4. ( ). Table 4. Amendment of radio station access for spectrum sharing in UK. Geographic licenses Opportunistic spectrum access ( ) TVWS DB,,,, UK (Tier 2: New Geographic License Layer),, Tier 1 (Tier 3: New Opportunistic Access Layer) Rule- based, Tier 1 Tier GHz 3-tier. 8 그림 GHz, Fig. 8. Regional service area of the multi-tier spectrum sharing users in GHz band GHz. 8 Tier 1, Tier 2 Tier 3., Tier 1, Tier 2 Tier 3, Tier 주파수공동사용사업모델제안사례 3-3 CBRS alliance. CBRS alliance CBRS 4 [14],[15]. CBRS, LTE-LAA(LTE-Licensed Assisted Access) Wi-Fi LTE-LAA. MVNO(Mobile Virtual Network Operator), LTE. Wi-Fi, CBRS,.. Neutral Host RAN.,, 207

9 THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. vol. 29, no. 3, Mar ,.,.,,,. Neutral Host,. LTE (Private-LTE service)., Wi-Fi.. 국내주파수공동사용정책도입방안 4-1 주파수공동사용후보대역가치평가및선정방안 5,.. CBRS 10 MHz.,. 표 5. Table 5. Business evaluation items of spectrum sharing service. ( ), 100 MHz ( )., ( ) 100%, (, ) 10, 5 10, 5 Priority License 1, , 10 Priority. 1, 208

10 ., 1 Priority,. Priority,,.,, IMT [16],[17]., IMT 3GPP (3GPP band). TVWS,,,,. 5G,, IMT,. 3GPP 3GPP band 43 3,700 3,800 MHz 3GPP band, 3,800 MHz., GHz GHz, GHz. 2 ( MHz, GHz, GHz ) [18].,,.,. 4-2 지역적무선국면허제도도입방안 CBRS CFR Part 96(Code of Federal Regulation Part 96) PAL. CFR Part 96, PEA PAL. PEA 600 MHz, ( 10 MHz ) GHz.,,,, 209

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. vol. 29, no. 3, Mar. 2018..,,,,.,,, PAL, LSA 2.

600 MHz Fig. 9. Incentive auction process of the United States 600 MHz frequency band. 그림 10.

11 THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. vol. 29, no. 3, Mar ,,,,.,,, PAL, LSA 인센티브경매제도도입방안., FCC 600 MHz, 600 MHz. 600 MHz (reverse auction), (forward auction) MHz [19] [20]. 그림 MHz Fig. 9. Incentive auction process of the United States 600 MHz frequency band. 그림 MHz. Fig. 10. Incentive auction results of the United States 600 MHz frequency band.,..,,. 4-4 주파수공동사용적용가능서비스제안 IoT. IoT 3GPP NB-IoT(Narrow Band-IoT) LoRa Sigfox. IoT 210

12 , 3GPP IoT.,, IoT. IoT IoT. IoT.,,. IoT, IoT. 11 IoT IoT. 그림 11. IoT Fig. 11. QoS(Quality of Service) estimation of IoT based on spectrum sharing. 그림 12. IoT Fig. 12. Application method of IoT service based on spectrum sharing in the domestic radio station authorization procedures. IoT,,., 2. 12, IoT.. 결론.,,,.,, TVWS,. (IMT 211

13 THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. vol. 29, no. 3, Mar ),. 5G., 5G Massive IoT,, VR.,,,. References [1] President s Council of Advisors on Science and Technology (PCAST), "Realizing the full potential of government-held spectrum to spur economic growth," Jul [2] T. Lavender, V. Jervis, and W. Webb, Flexible Spectrum Access Methods Report for the UK Spectrum Policy Forum, Oct [3] Geolinks, Promoting Investment in the 3,550 3,700 MHz Band, FCC Fact Sheet, Oct Available: geolinks.com/promoting-investment mhz-band/ [4] FCC , Notice of Proposed Rulemaking and Order Terminating Petitions, Oct [5] Ofcom, 3.8 GHz to 4.2 GHz Band: Opportunities for Innovation, Apr Available: [6], ( ), 13292, [7] 6 3( ), 14839, [8] D. Meyer, "3.5 GHz CBRS band progress set to bolster industry 5G plans," Apr Available: rcrwireless.com. [9] G. Kim, "T-mobile wants CBRs rules fitting 5G," Jun Available: [10], 4 K-ICT,, [11] FCC , Expanding Flexible Use in Mid-Band Spectrum between 3.7 and 24 GHz(GN Docket No ), Aug [12] Ofcom, A Framework for Spectrum Sharing, Consultations and Statements, Jul [13] Ofcom, A Framework for Spectrum Sharing, Statement, Apr [14] CBRS Alliance. Available: [15] K. Mun, CBRS White Paper: CBRS: New Shared Spectrum Enables Flexible Indoor and Outdoor Mobile Solutions and New Business Models, Mar [16] LTE Frequency Band, Available: band.php. [17] GSA, The Future of IMT in the 3,300~4,200 MHz Frequency Range, GSA White Paper, Jun [18], 7 UWB, [19] D. Gomez-Barquero, M. W. Caldwell, "Broadcast television spectrum incentive auctions in the U.S.: Trends, challenges, and opportunities," IEEE Communications Magazine, vol. 53, no. 7, pp , Jul [20] Mosaik, Mosaik in Fierce Wireless: Mapping T-Mobile, Dish, Comcast and AT&T 600 MHz Wireless Spectrum Ownership. Available: highlighted-in-fierce-wireless-mapping-t-mobile-dish-com cast-and-att-who-got-how-much-600-mhz-spectrum-andwhere. 212

2001 2 : ( ) 2010 8 : ( ) 2013 12 : 2014 3 : TTA PG901 WG9013 2013 7 2013 11 : 2011 3 2013 2 : CR/SDR 2010 9

Polytechnic Institute of New York University, Electrical Engineering ( ) 1995 9 : 2017 1 : 2014 3 2016 : 2014 3

14 : ( ) : ( ) : : TTA PG901 WG : : CR/SDR : : ( ) [ 주관심분야 ],, Cognitive Radio, TV White Space,, : ( ) : ( ) : Polytechnic Institute of New York University, Electrical Engineering ( ) : : : : TTA PG901 WG : TV White Space : : CR SDR [ 주관심분야 ] Cognitive Radio, TV White Space,,, 213

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE May; 27(5),

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2016 May; 27(5), 454462. http://dx.doi.org/10.5515/kjkiees.2016.27.5.454 ISSN 1226-3133 (Print)ISSN 2288-226X (Online) Research