CNL

Research | Projects

Ongoing Projects

No. Period Title

[P44] Sep. 2020 - Aug. 2027
(7 years^*, BK21 FOUR) Mobile Blockchain based Intelligent Healthcare Solution Education and Research Team for Disaster and Emergency
재난/응급 현장을 위한 모바일 블록체인 기반 지능형 헬스케어 솔루션 교육연구단
as a co-professor
^*: '22 이행점검, '24 중간평가 (BK20)

[P43] Jun. 2022 - Feb. 2025
(2.6 years) Multi-agent Deep Reinforcement Learning-based Beam Management Technologies for 6G Hyper-space D2D Networks
6G 초공간 D2D 네트워크에서 멀티에이전트 심층강화학습 기반 빔 관리 기술 연구 (N22)

No.	Period	Title
[P44]	Sep. 2020 - Aug. 2027 (7 years^, BK21* FOUR)	Mobile Blockchain based Intelligent Healthcare Solution Education and Research Team for Disaster and Emergency 재난/응급 현장을 위한 모바일 블록체인 기반 지능형 헬스케어 솔루션 교육연구단 as a co-professor ^*: '22 이행점검, '24 중간평가	(BK20)
[P43]	Jun. 2022 - Feb. 2025 (2.6 years)	Multi-agent Deep Reinforcement Learning-based Beam Management Technologies for 6G Hyper-space D2D Networks 6G 초공간 D2D 네트워크에서 멀티에이전트 심층강화학습 기반 빔 관리 기술 연구	(N22)

Completed Projects (Sep. 2008 ~ )

No. Period Title

[P42] Mar. 2023 - Dec. 2023 Deep Learning-based Wireless Signal Identification
딥러닝 기반 무선 신호 식별 연구 (R&E23)

[P41] Mar. 2023 - Nov. 2023 Beam Management and Call Flow Analysis in Cellular Networks
빔 관리 및 호처리 분석 (CNL23)

[P40] Jun. 2020 - Feb. 2023
(2.6 years) Wireless Environment-Aware Intelligent Beam Management Technologies for mmWave Vehicular Communications
밀리미터파 차량통신 네트워크에서 무선 상황인식 기반 빔관리 요소기술 연구 (N20)

[P39] Mar. 2022 - Dec. 2022 Deep learning-based Beam Management in 6G Vehicular Communication Networks
6G 차량통신 네트워크에서 딥러닝 기반 빔 관리 기술 연구 (R&E22)

[P38] Apr. 2022 - Dec. 2022 Beam Management and Call Flow Analysis in Cellular Networks
빔 관리 및 호처리 분석 (CNL22)

[P37] Oct. 2020 - Oct. 2022
(2 years) Communication Technologies for an AI-based Ticket Machine
AI 기반 무인티켓발권기를 위한 통신 기술 연구 (TIPA20)

[P36] Apr. 2021 - Dec. 2021 Beam Management and Call Flow Analysis in Cellular Networks
빔 관리 및 호처리 분석 (CNL21)

[P35] Mar. 2021 - Dec. 2021 Machine Learning-based CSI Feedback in 5G Networks
5G 이동통신에서 머신러닝 기반 채널 상태 정보 피드백 기술 연구 (R&E21)

[P34] Jun. 2019 - Feb. 2021 Machine Learning Technologies for Interference Mitigation and Resource Management in Heterogeneous Dense Networks
밀집 이종 네트워크에서 간섭 제어 및 자원 관리를 위한 기계학습 기술 연구 (N19)

[P33] Mar. 2020 - Dec. 2020 Deep Learning-based Cryptanalysis of Block Ciphers
딥러닝을 이용한 암호 취약점 분석 연구 (R&E20)

[P32] Feb. 2019 - Nov. 2019 Machine Learning-based Cryptanalysis
머신러닝을 이용한 암호분석 기법 연구 (KIISC19)

[P31] Nov. 2016 - Oct. 2019
(3 years^*) Radio Access Technologies for Connectivities of Massive Drones in Integrated 5G/LPWA Networks
5G/LPWA HetNet 환경에서 Massive 드론 서비스를 위한 무선 접속 기술 연구
^*: Nov. '16 (12m), Nov. '17 (10m), Sep. '18 (10m), Jul. '19 (4m) (N16)

[P30] Feb. 2018 - Nov. 2018 Vulnerability Analysis of Password Manager Programs
상용 패스워드 관리 프로그램 취약점 분석 (KIISC18)

[P29] Jun. 2017 - May 2018 Development of a Location-based App
맞춤형 서비스를 위한 위치 기반 앱 개발 (TIPA17)

[P28] Nov. 2017 - Jan. 2018 Performance Evaluation of Network Assisted Autonomous Driving
Network Assisted 자율주행 성능 평가 연구 (S17)

[P27] Feb. 2017 - Nov. 2017 Development of a Bluetooth Car Kit Emulator
블루투스 카킷 에뮬레이터 개발 (L17)

[P26] Nov. 2014 - Apr. 2017
(2.5 years) Machine LTE-Lite technologies to enable massive devices connections and energy life managements
Massive 디바이스 접속 및 에너지 관리를 위한 사물 LTE-Lite 기술 연구 (N14)

[P25] Feb. 2016 - Feb. 2017 Contactless Power Supply based Wi-Fi and Drone Services
무접점 전원공급장치 기반의 Wi-Fi 및 드론 서비스 연구 (산학공동) (SG16)

[P24] Sep. 2016 - Jan. 2017 Fast Handoff Algorithm and Test-bed Developments for Mobile Wi-Fi Networks with Electromagnetic Energy Harvesting
전력선 자기유도 기반 Wi-Fi 이동 네트워크에서 빠른 핸드오프 기술 개발 및 테스트베드 구축 (LINC 산학공동) (LINC16)

[P23] Mar. 2016 - Oct. 2016 Development of Audio-based Bluetooth Chopping Analyzer and Research on Coexistence of aptX HD Audio and Wi-Fi
수신 측 실제 음 기반 블루투스 쵸핑 분석 툴 개발 및 aptX HD 오디오의 Wi-Fi Co-ex 연구 (L16)

[P22] Sep. 2015 - Feb. 2016 Massive connectivity technologies for cellular IoT
셀룰러 기반 Massive Connectivity 지원을 위한 무선 접속 기술 연구 (S15)

[P21] May 2015 - Dec. 2015
Qualification and improvement of audio chopping over bluetooth A2DP
블루투스 쵸핑 정량화 및 개선 방안 연구 (L15)

[P20] Jun. 2013 - Dec. 2015
(3 years, C-ITRC) Application technology for advanced green digital vessels
첨단 그린 디지털 선박을 위한 응용기술 연구
as a co-professor (CITRC13)

[P19] Jun. 2015 - Nov. 2015 A Study on IoT device connectivity technologies
IoT 디바이스 연결성 기술 연구 (L15b)

[P18] May 2012 - Apr. 2015
(3 years) Core technologies of a massive BDMA system for vehicle communications
이동체를 위한 massive BDMA 시스템 요소 기술 개발 (N12)

[P17] May 2012 - Apr. 2015
(3 years) A study on spectrum sharing techniques based on cooperative sensing and DB for cognitive LTE systems
LTE 신규 대역 개발을 위한 협력적 센싱 및 DB 기반 주파수 공유 기술 연구
as a co-professor (IITP12)

[P16] Jun. 2014 - Nov. 2014 IoT standards and trends
IoT 표준 및 동향 분석 (L14)

[P15] Jun. 2013 - May 2014 A study on the smartphone interfaces
스마트폰 인터페이스 개선 연구 (L13)

[P14] Aug. 2013 - Feb. 2014 Research on the convergence network of broadcasting and communications for frequency sharing broadcasting systems
주파수 공유형 방송시스템을 위한 방통융합 네트워크 연구 (ETRI13)

[P13] May 2013 - Dec. 2013 Performance evaluation of a LTE (LTE-Advanced) system under adjacent channel interference
타 통신 서비스 신호원에 의한 LTE (LTE-Advanced) 시스템 성능분석 연구
as a co-professor (ETRI13)

[P12] May 2010 - Apr. 2013
(3 years) Utility function based resource optimization in next communication systems
차세대 통신시스템에서 유틸리티 함수 기반의 최적화된 자원관리 프로토콜 개발 (N10)

[P11] Sep. 2008 - Feb. 2013
(4.5 years, BK21) Frequency-agile access point for plug-and-access research
Plug and Access용 Frequency Agile AP 연구/교육 사업
as a co-professor (BK08)

[P10] Oct. 2012 - Dec. 2012 UL CoMP schemes for LTE systems
LTE 시스템을 위한 UL CoMP 방안 연구 (S12)

[P09] May 2009 - Apr. 2012
(3 years) Cross-layer design and self-organization in femtocell networks
펨토셀 네트워크에서 계층간 교차 설계와 자기 구성 기법 (N09)

[P08] Jun. 2011 - Dec. 2011 Efficient transmission methods of medical information on the basis of space division multiple access
공간 분할 다중 접속 기반의 효율적인 의료 정보 전송 방안 (DGIST11)

[P07] May 2010 - Apr. 2011 Utility function based adaptive resource management in wireless OFDMA systems
OFDMA 통신시스템에서 유틸리티 함수 기반의 동적 자원 관리 프로토콜 개발 (SG10)

[P06] Jun. 2010 - Nov. 2010 Utility function based resource and coverage management in LTE systems
유틸리티 함수 기반의 LTE 시스템 자원 및 커버리지 관리 기술 연구 (S10)

[P05] Mar. 2010 - Nov. 2010 Performance enhancement of ARQ protocols for IEEE 802.16e mobile terminals
IEEE 802.16m 단말의 ARQ 구현 성능 개선
as a co-professor (SS10)

[P04] Oct. 2009 - Sep. 2010 Optimal selection of modulation and coding scheme in mobile WiMAX systems
Mobile WiMAX 통신 시스템에서 변조 및 코딩 방식 선택 기법 (SG09)

[P03] Jun. 2009 - May 2010 Efficient radio resource management scheme on the basis of cross-layer design in wireless OFDMA systems
무선 OFDMA 시스템에서 계층간 교차 설계 기반의 효율적 자원 관리 기법 (SH09)

[P02] May 2009 - Apr. 2010 Performance evaluation of VoIP services in wireless OFDMA systems
무선 OFDMA 통신 시스템에서 VoIP 서비스 성능 실험 (SG09)

[P01] Nov. 2008 - Oct. 2009 Performance evaluation of wireless communication systems with limited feedback
제한된 피드백을 가지는 무선 통신시스템의 성능 실험 (SG08)

No.	Period	Title
[P42]	Mar. 2023 - Dec. 2023	Deep Learning-based Wireless Signal Identification 딥러닝 기반 무선 신호 식별 연구	(R&E23)
[P41]	Mar. 2023 - Nov. 2023	Beam Management and Call Flow Analysis in Cellular Networks 빔 관리 및 호처리 분석	(CNL23)
[P40]	Jun. 2020 - Feb. 2023 (2.6 years)	Wireless Environment-Aware Intelligent Beam Management Technologies for mmWave Vehicular Communications 밀리미터파 차량통신 네트워크에서 무선 상황인식 기반 빔관리 요소기술 연구	(N20)
[P39]	Mar. 2022 - Dec. 2022	Deep learning-based Beam Management in 6G Vehicular Communication Networks 6G 차량통신 네트워크에서 딥러닝 기반 빔 관리 기술 연구	(R&E22)
[P38]	Apr. 2022 - Dec. 2022	Beam Management and Call Flow Analysis in Cellular Networks 빔 관리 및 호처리 분석	(CNL22)
[P37]	Oct. 2020 - Oct. 2022 (2 years)	Communication Technologies for an AI-based Ticket Machine AI 기반 무인티켓발권기를 위한 통신 기술 연구	(TIPA20)
[P36]	Apr. 2021 - Dec. 2021	Beam Management and Call Flow Analysis in Cellular Networks 빔 관리 및 호처리 분석	(CNL21)
[P35]	Mar. 2021 - Dec. 2021	Machine Learning-based CSI Feedback in 5G Networks 5G 이동통신에서 머신러닝 기반 채널 상태 정보 피드백 기술 연구	(R&E21)
[P34]	Jun. 2019 - Feb. 2021	Machine Learning Technologies for Interference Mitigation and Resource Management in Heterogeneous Dense Networks 밀집 이종 네트워크에서 간섭 제어 및 자원 관리를 위한 기계학습 기술 연구	(N19)
[P33]	Mar. 2020 - Dec. 2020	Deep Learning-based Cryptanalysis of Block Ciphers 딥러닝을 이용한 암호 취약점 분석 연구	(R&E20)
[P32]	Feb. 2019 - Nov. 2019	Machine Learning-based Cryptanalysis 머신러닝을 이용한 암호분석 기법 연구	(KIISC19)
[P31]	Nov. 2016 - Oct. 2019 (3 years^*)	Radio Access Technologies for Connectivities of Massive Drones in Integrated 5G/LPWA Networks 5G/LPWA HetNet 환경에서 Massive 드론 서비스를 위한 무선 접속 기술 연구 ^*: Nov. '16 (12m), Nov. '17 (10m), Sep. '18 (10m), Jul. '19 (4m)	(N16)
[P30]	Feb. 2018 - Nov. 2018	Vulnerability Analysis of Password Manager Programs 상용 패스워드 관리 프로그램 취약점 분석	(KIISC18)
[P29]	Jun. 2017 - May 2018	Development of a Location-based App 맞춤형 서비스를 위한 위치 기반 앱 개발	(TIPA17)
[P28]	Nov. 2017 - Jan. 2018	Performance Evaluation of Network Assisted Autonomous Driving Network Assisted 자율주행 성능 평가 연구	(S17)
[P27]	Feb. 2017 - Nov. 2017	Development of a Bluetooth Car Kit Emulator 블루투스 카킷 에뮬레이터 개발	(L17)
[P26]	Nov. 2014 - Apr. 2017 (2.5 years)	Machine LTE-Lite technologies to enable massive devices connections and energy life managements Massive 디바이스 접속 및 에너지 관리를 위한 사물 LTE-Lite 기술 연구	(N14)
[P25]	Feb. 2016 - Feb. 2017	Contactless Power Supply based Wi-Fi and Drone Services 무접점 전원공급장치 기반의 Wi-Fi 및 드론 서비스 연구 (산학공동)	(SG16)
[P24]	Sep. 2016 - Jan. 2017	Fast Handoff Algorithm and Test-bed Developments for Mobile Wi-Fi Networks with Electromagnetic Energy Harvesting 전력선 자기유도 기반 Wi-Fi 이동 네트워크에서 빠른 핸드오프 기술 개발 및 테스트베드 구축 (LINC 산학공동)	(LINC16)
[P23]	Mar. 2016 - Oct. 2016	Development of Audio-based Bluetooth Chopping Analyzer and Research on Coexistence of aptX HD Audio and Wi-Fi 수신 측 실제 음 기반 블루투스 쵸핑 분석 툴 개발 및 aptX HD 오디오의 Wi-Fi Co-ex 연구	(L16)
[P22]	Sep. 2015 - Feb. 2016	Massive connectivity technologies for cellular IoT 셀룰러 기반 Massive Connectivity 지원을 위한 무선 접속 기술 연구	(S15)
[P21]	May 2015 - Dec. 2015	Qualification and improvement of audio chopping over bluetooth A2DP 블루투스 쵸핑 정량화 및 개선 방안 연구	(L15)
[P20]	Jun. 2013 - Dec. 2015 (3 years, C-ITRC)	Application technology for advanced green digital vessels 첨단 그린 디지털 선박을 위한 응용기술 연구 as a co-professor	(CITRC13)
[P19]	Jun. 2015 - Nov. 2015	A Study on IoT device connectivity technologies IoT 디바이스 연결성 기술 연구	(L15b)
[P18]	May 2012 - Apr. 2015 (3 years)	Core technologies of a massive BDMA system for vehicle communications 이동체를 위한 massive BDMA 시스템 요소 기술 개발	(N12)
[P17]	May 2012 - Apr. 2015 (3 years)	A study on spectrum sharing techniques based on cooperative sensing and DB for cognitive LTE systems LTE 신규 대역 개발을 위한 협력적 센싱 및 DB 기반 주파수 공유 기술 연구 as a co-professor	(IITP12)
[P16]	Jun. 2014 - Nov. 2014	IoT standards and trends IoT 표준 및 동향 분석	(L14)
[P15]	Jun. 2013 - May 2014	A study on the smartphone interfaces 스마트폰 인터페이스 개선 연구	(L13)
[P14]	Aug. 2013 - Feb. 2014	Research on the convergence network of broadcasting and communications for frequency sharing broadcasting systems 주파수 공유형 방송시스템을 위한 방통융합 네트워크 연구	(ETRI13)
[P13]	May 2013 - Dec. 2013	Performance evaluation of a LTE (LTE-Advanced) system under adjacent channel interference 타 통신 서비스 신호원에 의한 LTE (LTE-Advanced) 시스템 성능분석 연구 as a co-professor	(ETRI13)
[P12]	May 2010 - Apr. 2013 (3 years)	Utility function based resource optimization in next communication systems 차세대 통신시스템에서 유틸리티 함수 기반의 최적화된 자원관리 프로토콜 개발	(N10)
[P11]	Sep. 2008 - Feb. 2013 (4.5 years, BK21)	Frequency-agile access point for plug-and-access research Plug and Access용 Frequency Agile AP 연구/교육 사업 as a co-professor	(BK08)
[P10]	Oct. 2012 - Dec. 2012	UL CoMP schemes for LTE systems LTE 시스템을 위한 UL CoMP 방안 연구	(S12)
[P09]	May 2009 - Apr. 2012 (3 years)	Cross-layer design and self-organization in femtocell networks 펨토셀 네트워크에서 계층간 교차 설계와 자기 구성 기법	(N09)
[P08]	Jun. 2011 - Dec. 2011	Efficient transmission methods of medical information on the basis of space division multiple access 공간 분할 다중 접속 기반의 효율적인 의료 정보 전송 방안	(DGIST11)
[P07]	May 2010 - Apr. 2011	Utility function based adaptive resource management in wireless OFDMA systems OFDMA 통신시스템에서 유틸리티 함수 기반의 동적 자원 관리 프로토콜 개발	(SG10)
[P06]	Jun. 2010 - Nov. 2010	Utility function based resource and coverage management in LTE systems 유틸리티 함수 기반의 LTE 시스템 자원 및 커버리지 관리 기술 연구	(S10)
[P05]	Mar. 2010 - Nov. 2010	Performance enhancement of ARQ protocols for IEEE 802.16e mobile terminals IEEE 802.16m 단말의 ARQ 구현 성능 개선 as a co-professor	(SS10)
[P04]	Oct. 2009 - Sep. 2010	Optimal selection of modulation and coding scheme in mobile WiMAX systems Mobile WiMAX 통신 시스템에서 변조 및 코딩 방식 선택 기법	(SG09)
[P03]	Jun. 2009 - May 2010	Efficient radio resource management scheme on the basis of cross-layer design in wireless OFDMA systems 무선 OFDMA 시스템에서 계층간 교차 설계 기반의 효율적 자원 관리 기법	(SH09)
[P02]	May 2009 - Apr. 2010	Performance evaluation of VoIP services in wireless OFDMA systems 무선 OFDMA 통신 시스템에서 VoIP 서비스 성능 실험	(SG09)
[P01]	Nov. 2008 - Oct. 2009	Performance evaluation of wireless communication systems with limited feedback 제한된 피드백을 가지는 무선 통신시스템의 성능 실험	(SG08)

Past Projects (Jan. 1997 ~ Aug. 2008)

Title

[Q25] Research on a cross-layer design of MIMO wireless communications systems, funded by Korea Research Foundation, Jan. 2008 – Aug. 2008.
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[Q24] Development of an advanced mobile WiMAX base station that supports advanced features such as frequency overlay, 4X4 multiuser MIMO, efficient resource mappings, and 200 Mbps data rate, Sep. 2006 – Dec. 2007.
[Q23] Development of a mobile WiMAX FDD base station that supports about 100 Mbps by using 2X2 MIMO communications, Jan. 2006 – Dec. 2006.
[Q22] Development of a mobile WiMAX TDD base station that supports beamforming and 2X2 MIMO communications, Jan. 2006 – Dec. 2006.
[Q21] Development of a 4G wireless trial system that supports an 1 Gbps data rate, Sep. 2005 – Feb. 2006.
[Q20] Design and performance evaluation of IEEE 802.16e systems, Jan. 2006 – Dec. 2007.
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[Q19] Development of commercial IEEE 802.11a/b/g access points and wireless bridges, Jan. 2003 – Aug. 2005.
[Q18] Development of commercial IEEE 802.11a/b/g client adapters and client software, Jan. 2002 – Dec. 2003.
[Q17] Development of commercial heterogeneous network solutions that allow seamless roaming without disconnection between different multiple networks such as Wi-Fi, cellular, mobileWiMAX, and wired networks, Jun. 2001 – Nov. 2004.
[Q16] Development of a mobile access router for vehicle wireless Internet services, Nov. 2003 – Nov. 2004.
The mobile access router offers seamless mobility and interoperability across multiple wireless networks while in motion.
[Q15] Development of client software that allows seamless roaming in integrated portable Internet/1xEV-DO/Wi-Fi networks, Oct. 2003 – Apr. 2004.
[Q14] Development of diagnostic monitoring software for a wideband multimedia service, May 2003 – Dec. 2003.
The software decodes and analyzes IEEE 802.11 packets and mobile IP packets.
[Q13] Development of a broadband access serving network gateway that provides interworking between Wi-Fi networks and cellular networks, Jul. 2002. – Jan. 2003.
[Q12] Development of connection manager software that provides seamless roaming between Wi-Fi networks and cdma2000 networks, Jul. 2002 – Jan. 2003.
[Q11] Development of wireless LAN connection manager software, Jul. 2002 – Dec. 2002.
[Q10] Development of intelligent mobile IP client software that provides seamless roaming between Wi-Fi networks and cellular networks in a smart phone, May 2002 – Jul. 2002.
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[Q09] Set up, operated and maintained a roving test system (RTS), which is the Qualcomm’s pilot CDMA system that includes BTS, BSC, MSC, and PBX, KAIST, Jan. 1999 – Feb. 2002.
[Q08] Research on the architecture and performance of IP-based BSS systems, funded by Samsung Electronics, Nov. 2000 – Oct. 2001.
[Q07] Research on the IP-based multimedia services in IMT-2000 systems, funded by Samsung Electronics, Aug. 1999 – Aug. 2000.
[Q06] Development of a product, USB Hub Plus LAN, which provides three USB ports and one Ethernet port, funded by Withus (Jan. 2000 – Dec. 2000.
[Q05] Performance analysis of a CDMA backbone network, funded by SK Telecom, Sep. 1999 – Feb. 2000.
[Q04] Development of a diagnostic monitoring program in wireless CDMA systems, funded by Shinsegi Telecom, Jul. 1998 – Aug. 1999.
This project was awarded a silver prize by the Minister of Information and Communication, Korea, Soft Expo'99.
[Q03] Research on the packet data services in wireless CDMA systems, funded by SK Telecom, Jun. 1998 – May 1999.
[Q02] Design of an efficient medium access control protocol in IMT-2000 systems, funded by SK Telecom, Dec. 1997 – Nov. 1998.
[Q01] Development of a voice mail system based on the Web, funded by ETRI, Jan. 1997 – Dec. 1997.

Title
[Q25] Research on a cross-layer design of MIMO wireless communications systems, funded by Korea Research Foundation, Jan. 2008 – Aug. 2008. ---- [Q24] Development of an advanced mobile WiMAX base station that supports advanced features such as frequency overlay, 4X4 multiuser MIMO, efficient resource mappings, and 200 Mbps data rate, Sep. 2006 – Dec. 2007. [Q23] Development of a mobile WiMAX FDD base station that supports about 100 Mbps by using 2X2 MIMO communications, Jan. 2006 – Dec. 2006. [Q22] Development of a mobile WiMAX TDD base station that supports beamforming and 2X2 MIMO communications, Jan. 2006 – Dec. 2006. [Q21] Development of a 4G wireless trial system that supports an 1 Gbps data rate, Sep. 2005 – Feb. 2006. [Q20] Design and performance evaluation of IEEE 802.16e systems, Jan. 2006 – Dec. 2007. ---- [Q19] Development of commercial IEEE 802.11a/b/g access points and wireless bridges, Jan. 2003 – Aug. 2005. [Q18] Development of commercial IEEE 802.11a/b/g client adapters and client software, Jan. 2002 – Dec. 2003. [Q17] Development of commercial heterogeneous network solutions that allow seamless roaming without disconnection between different multiple networks such as Wi-Fi, cellular, mobileWiMAX, and wired networks, Jun. 2001 – Nov. 2004. [Q16] Development of a mobile access router for vehicle wireless Internet services, Nov. 2003 – Nov. 2004. The mobile access router offers seamless mobility and interoperability across multiple wireless networks while in motion. [Q15] Development of client software that allows seamless roaming in integrated portable Internet/1xEV-DO/Wi-Fi networks, Oct. 2003 – Apr. 2004. [Q14] Development of diagnostic monitoring software for a wideband multimedia service, May 2003 – Dec. 2003. The software decodes and analyzes IEEE 802.11 packets and mobile IP packets. [Q13] Development of a broadband access serving network gateway that provides interworking between Wi-Fi networks and cellular networks, Jul. 2002. – Jan. 2003. [Q12] Development of connection manager software that provides seamless roaming between Wi-Fi networks and cdma2000 networks, Jul. 2002 – Jan. 2003. [Q11] Development of wireless LAN connection manager software, Jul. 2002 – Dec. 2002. [Q10] Development of intelligent mobile IP client software that provides seamless roaming between Wi-Fi networks and cellular networks in a smart phone, May 2002 – Jul. 2002. ---- [Q09] Set up, operated and maintained a roving test system (RTS), which is the Qualcomm’s pilot CDMA system that includes BTS, BSC, MSC, and PBX, KAIST, Jan. 1999 – Feb. 2002. [Q08] Research on the architecture and performance of IP-based BSS systems, funded by Samsung Electronics, Nov. 2000 – Oct. 2001. [Q07] Research on the IP-based multimedia services in IMT-2000 systems, funded by Samsung Electronics, Aug. 1999 – Aug. 2000. [Q06] Development of a product, USB Hub Plus LAN, which provides three USB ports and one Ethernet port, funded by Withus (Jan. 2000 – Dec. 2000. [Q05] Performance analysis of a CDMA backbone network, funded by SK Telecom, Sep. 1999 – Feb. 2000. [Q04] Development of a diagnostic monitoring program in wireless CDMA systems, funded by Shinsegi Telecom, Jul. 1998 – Aug. 1999. This project was awarded a silver prize by the Minister of Information and Communication, Korea, Soft Expo'99. [Q03] Research on the packet data services in wireless CDMA systems, funded by SK Telecom, Jun. 1998 – May 1999. [Q02] Design of an efficient medium access control protocol in IMT-2000 systems, funded by SK Telecom, Dec. 1997 – Nov. 1998. [Q01] Development of a voice mail system based on the Web, funded by ETRI, Jan. 1997 – Dec. 1997.