Ho Young Hwang, Ph.D. Assistant Professor Department of Computer Engineering Kwangwoon University 447-1, Wolgye-dong, Nowon-gu, Seoul, 139-701, Korea Office : Room 606, Hwado-Bldg., Kwangwoon University Phone : +82-2-940-8265 FAX : +82-2-942-5121 E-mail : hyhwang@kw.ac.kr URL : http://sites.google.com/site/hyhwangs Lab : ICT (Information and Communication Technology) Lab. Lab Office : Room 623, Hwado-Bldg., Kwangwoon University Lab URL : http://ict.kw.ac.kr

1. Education

Ph.D. degree, Feb. 2008.

- at School of EECS (Electrical Engineering and Computer Science), KAIST (Korea Advanced Institute of Science and Technology)
- Adviser : Prof. Dan Keun Sung

M.S. degree, Feb. 2002.

- at Dept. of EECS (Electrical Engineering and Computer Science), KAIST
- Adviser : Prof. Dan Keun Sung

B.S. degree, Feb. 2000.

- at Dept. of EECS (Electrical Engineering and Computer Science), KAIST (Magna Cum Laude)
- Adviser : Prof. Jong-Hwan Kim

Seoul Science High School, Feb. 1996.

2. Professional Experience

Assistant Professor, Sep. 2010 ~ Present.

- at Department of Computer Engineering, Kwangwoon University, Seoul, Korea.

Postdoctoral Fellow, Sep. 2008 ~ Aug. 2010.

- at BBCR (Broadband Communications Research Group), Dept. of ECE (Electrical and Computer Engineering), University of Waterloo, Canada.

Post-doctoral Researcher, Mar. 2008 ~ Aug. 2008.

- at IERI (Information and Electronics Research Institute), KAIST.

Guest Researcher, Aug. 2002 ~ Aug. 2003.

- at ANTD (Advanced Network Technologies Division), NIST (National Institute of Standards and Technology), U.S.A.

Intern, Jan. 1999 ~ Feb. 1999.

- at Samsung Electronics Advanced Technology Training Institute, Samsung Electronics Co., Ltd.

3. Academic Experience

Teaching Assistant, Mar. 2001 ~ Feb. 2006.

- in School of Electrical Engineering and Computer Science, KAIST.

Research Assistant, Mar. 2000 ~ Feb. 2008.

- in CNR (Communication Networks Research Laboratory), KAIST.

Exchange Scholarship, Jun. 2000 ~ Aug. 2000.

- in UCI (University of California, Irvine), U.S.A.

4. Research Interests

3G/4G/Beyond 4G Mobile Communication Systems

LTE/LTE-Advanced Communication Systems

Mobile WiMAX/WiBro-Evolution Communication Systems

HSD(U)PA, 1xEV-DO, UMTS, GSM, GPRS Mobile Communication Systems

MIMO and Smart Antenna based Communication Systems

OFDM(A), CDMA, and TDMA based Communication Systems

Radio Resource Management, Multi-User Diversity, and Wireless Scheduling Algorithms

Cognitive Radios, Spectrum Sharing, and Coexistence Algorithms under Interference

Relay, Multi-Hop, and Cooperative Communications

Mobility and Power Management in GSM, GPRS, UMTS, and All-IP Networks

Wireless Local/Personal/Body Area Networks (WLAN/WPAN/WBAN)

WiFi, Bluetooth, and ZigBee Communication Systems

UWB and mmWave Communication Systems

Ubiquitous Wearable Computers and Systems

Energy-Efficient Protocols in Wireless Sensor Networks

Mobile Ad Hoc Networks, Mobile IP, and All-IP Networks

QoS Management and Traffic Engineering in IP, ATM, MPLS, and All-IP Networks

5. Research Project Experience

"A Study on Cooperative Routing and Cooperative Medium Access Control for Tactical Mobile Communication System,” funded by ADD, 2010-2012.

"QoS Support and Performance Enhancement for Next Generation WPAN/WLAN/WiMAX Systems,” funded by KRF, 2008-2009.

"OFDM Based Next Generation Broadband Mobile Access Technology,” funded by ITRC, 2004-2008.

"Development of IEEE 802.11a/b/g DCF and IEEE 802.11e EDCA MAC Simulators,” funded by ETRI, 2005.

"UWB Based MAC Protocols and Networking Technologies for Public Radio Access Networks,” funded by KRF, 2003-2004.

"Modeling and Simulation of Ad Hoc Data Communication Network Protocol,” funded by ADD, 2003-2004.

"A Service Level Simulator for the Third Generation Wireless Communication Systems with Multimedia Traffic Model,” funded by HFR, 2003-2004.

"QoS Assurance Schemes in High Speed Routers,” funded by ETRI, 2003.

"Packet Quality of Service Management in IMT-2000 Networks,” funded by KT ICOM, 2002.

"Performance Evaluation of SGSN and GGSN for IMT-2000 GPRS Networks,” funded by LG Electronics, 2000-2001.

"Performance Evaluation of MSC for IMT-2000 GPRS Networks,” funded by LG Electronics, 2000-2001.

"QoS Control and Management in IMT-2000 Systems,” funded by KT, 2000.

"Performance Evaluation and Traffic Management of the ACE 2000 ATM Switching System,” funded by ETRI, 2000.

"Integration of Wired and Wireless Networks in IMT-2000 Networks,” funded by LG Dacom, 2000.

6. Papers

M.S. Thesis.

• “A Mobility Management Scheme for Reducing Power Consumption in IP-Based Wireless Networks”
• Thesis adviser : Prof. Dan Keun Sung.

Ph.D. Thesis.

• “Enhanced Medium Access Control in QoS Enabled Wireless LANs”
• Thesis adviser : Prof. Dan Keun Sung.

International Journal Papers

1. Ju Yong Lee, Ho Young Hwang, Jitae Shin, and Shahrokh Valaee,
   “Distributed Optimal TXOP Control for Throughput Requirements in IEEE 802.11e Wireless LAN,”
   IEEE Transactions on Communications, (In Preparation).
2. Jo Woon Chong, Ho Young Hwang, and Dan Keun Sung
   “The Effect of WLAN Interference on the Performance of ZigBee Networks,”
   IEEE Transactions on Vehicular Technology, (In Preparation).
3. Chang Yong Jung, Ho Young Hwang, and Dan Keun Sung,
   “The Effect of Multi-User Interference on Medium Access Control Layer in Impulse Radio Based UWB Networks,”
   IEEE Transactions on Vehicular Technology, (In Preparation).
4. Ho Young Hwang, Seong Joon Kim, Byung-Soo Kim, Dan Keun Sung, Suwon Park, and Young-uk Chung
   "Modeling and Analysis of Wireless LANs with a Backoff Freezing Mechanism,”
   Information-An International Interdisciplinary Journal, Vol. 15, No. 3, pp, 1081-1094, Mar. 2012.
5. Sujin Kwon, Young-uk Chung, Yong-Hoon Choi, Suwon Park, and Ho Young Hwang
   "A Novel Power Saving Mechanism for IEEE 802.16e Femtocell Base Station,"
   Information-An International Interdisciplinary Journal, Vol. 15, No. 3, pp, 1095-1105, Mar. 2012.
6. Ho Young Hwang, Sun-Jong Kwon, Yun Won Chung, Dan Keun Sung, and Suwon Park,
   "Modeling and Analysis of an Energy-Efficient Mobility Management Scheme in IP-Based Wireless Networks,"
   Sensors, Vol. 11, No. 12, pp, 11273-11294, Nov. 2011.
7. Jognwoo Kim, Suwon Park, Seung Hyong Rhee, Yong-Hoon Choi, Young-uk Chung, and Ho Young Hwang
   "Coexistence of WiFi and WiMAX Systems Based on PS-Request Protocols,"
   Sensors, Vol. 11, No. 10, pp, 9700-9716, Oct. 2011.
8. Jongwoo Kim, Suwon Park, Seung Hyong Rhee, Yong-Hoon Choi, Ho Young Hwang, and Young-uk Chung,
   "Coexistence of WiFi and WiMAX Systems Based on Coexistence Zone within WiMAX Frame Structure and Modified Power Saving Mode of WiFi System,"
   IEICE Transactions on Communications, Vo.E94-B, No.6, pp.1781-1784, June 2011.
9. Yun Won Chung and Ho Young Hwang,
   “Modeling and Analysis of Energy Conservation Scheme based on Duty Cycling in Wireless Ad Hoc Sensor Network,”
   Sensors, Vol. 10, No. 6, pp. 5569-5589, June 2010.
10. Jin Woo Yang, Jae Kyun Kwon, Ho Young Hwang and Dan Keun Sung,
    “Goodput Analysis of a WLAN with Hidden Nodes under a Non-Saturated Condition,”
    IEEE Transactions on Wireless Communications, Vol. 8, No. 5, pp. 2259-2264, May 2009.
11. Chang Yong Jung, Ho Young Hwang, Dan Keun Sung, and Gang Uk Hwang,
    “Enhanced Markov Chain Model and Throughput Analysis of the Slotted CSMA/CA for IEEE 802.15.4 under Unsaturated Traffic Conditions,”
    IEEE Transactions on Vehicular Technology, Vol. 58, No. 1, pp. 473-478, Jan. 2009.
12. Hu Jin, Bang Chul Jung, Ho Young Hwang, and Dan Keun Sung,
    “A MIMO-Based Collision Mitigation Scheme in Uplink WLANs,”
    IEEE Communications Letters, Vol. 12, No. 6, pp. 417-419, June 2008.
13. Ho Young Hwang, Seong Joon Kim, Dan Keun Sung, and Nah-Oak Song,
    “Performance Analysis of IEEE 802.11e EDCA with a Virtual Collision Handler,”
    IEEE Transactions on Vehicular Technology, Vol. 57, No. 2, pp. 1293-1297, Mar. 2008.
14. Seong Joon Kim, Ho Young Hwang, Jae Kyun Kwon, and Dan Keun Sung,
    “Saturation Performance Analysis of IEEE 802.11 WLAN under the Assumption of No Consecutive Transmissions,”
    IEICE Transactions on Communications, Vol. E90-B, No. 3, pp. 700-703, Mar. 2007.
15. Yun Won Chung, Ho Young Hwang and Dan Keun Sung,
    “Modeling and Analysis of Mobility Management State of Packet-Switched (PS) Services in GPRS,”
    Computer Communications, Vol. 30, No. 1, pp. 166-177, Dec. 2006.
16. Sun-Jong Kwon, Seung Yeob Nam, Ho Young Hwang and Dan Keun Sung,
    “Analysis of a Mobility Management Scheme Considering Battery Power Conservation in IP-Based Mobile Networks,”
    IEEE Transactions on Vehicular Technology, Vol. 53, No. 6, pp. 1882-1890, Nov. 2004.

Domestic Journal Papers

1. H. Y. Hwang, Y. W. Chung, M. J. Kim, C. Y. Jung, J. K. Kwon, and D. K. Sung,
   “Review and Analysis of Energy-Efficient MAC Protocols in Wireless Sensor Networks,”
   SK Telecommunications Review, Vol. 14, No. 6, pp. 918-935, Dec. 2004.
2. C. Y. Jung, J. W. Chong, H. Y. Hwang, D. K. Sung, S. S. Jung, and M. W. Bang,
   “QoS Based AAL2/ATM Multiplexing Schemes in the UTRAN Iub Interface,”
   The Journal of KICS (The Journal of the Korean Institute of Communication Sciences), Vol. 28, No. 6A, pp. 386-396, June 2003.

International Conference Papers

1. J. Y. Lee, H. Y. Hwang, J. Shin, and S. Valaee
   "Distributed Optimal TXOP Control for Throughput Requirements in IEEE 802.11e Wireless LAN,"
   IEEE PIMRC 2011, Toronto, Canada, Sept. 11-14, 2011.
2. H. Y. Hwang, S. J. Kim, B.-S. Kim, D. K. Sung, and S. Park,
   "Performance Analysis of Wireless LANs with a Backoff Freezing Mechanism,"
   ACN 2011 (Advanced Communication and Networking 2011), Brno, Czech Republic, Aug. 15-17, 2011.
3. J. Kim, S. Park, S. H. Rhee, Y.-H. Choi, H. Y. Hwang, and Y.-U. Chung,
   "Performance Improvement Method for Wi-Fi Networks Sharing Spectrum,"
   ACN 2011 (Advanced Communication and Networking 2011), Brno, Czech Republic, Aug. 15-17, 2011.
4. S. Moon, T. Shin, S. Park, H. Lee, C. B. Sohn, Y.-U. Chung, and H. Y. Hwang,
   "Energy Saving Method for Wi-Fi Stations Based on Partial Virtual Bitmap,"
   ACN 2011 (Advanced Communication and Networking 2011), Brno, Czech Republic, Aug. 15-17, 2011.
5. H. Y. Hwang, S.-J. Kwon, Y. W. Chung, D. K. Sung, and S. Park,
   "Steady State Analysis of an Energy Efficient Mobility Management Scheme in IP-Based Wireless Networks,"
   FGIT 2010 (Future Generation Information Technology 2010), Jeju Island, Korea, Dec. 13-15, 2010.
6. J. Kim, S. Park, S. H. Rhee, Y.-H. Choi, and H. Y. Hwang,
   "Energy Efficient Coexistence of WiFi and WiMAX Systems Sharing Frequency Band,"
   FGIT 2010 (Future Generation Information Technology 2010), Jeju Island, Korea, Dec. 13-15, 2010.
7. L. X. Cai, H. Y. Hwang, X. Shen, J.W. Mark and L. Cai,
   “Optimizing Geographic Routing for Millimeter-wave Wireless Networks with Directional Antenna,” (invited paper),
   Broadnets 2009, pp. 1-8, Madrid, Spain, Sept. 14-16, 2009.
8. B. H. Jung, S. J. Kim, H. Jin, H. Y. Hwang, J. W. Chong, and D. K. Sung,
   “Performance Improvement of Error-Prone Multi-Rate WLANs through Adjustment of Access/Frame Parameters,”
   IEEE ICC 2009, pp. 1-6, Dresden, Germany, June 14-18, 2009.
9. H. Jin, B. C. Jung, H. Y. Hwang, and D. K. Sung,
   “A Throughput Balancing Problem between Uplink and Downlink in Multi-user MIMO-based WLAN Systems,”
   IEEE WCNC 2009, pp. 1-6, Budapest, Hungary, Apr. 5-8, 2009.
10. B. S. Kim, H. Y. Hwang , and D. K. Sung,
    “Effect of Frame Aggregation on the Throughput Performance of IEEE 802.11n,”
    IEEE WCNC 2008, pp. 1740-1744, Las Vegas, USA, Mar. 31-Apr. 3, 2008.
11. H. Jin, B. C. Jung, H. Y. Hwang , and D. K. Sung,
    “Performance Comparison of Uplink WLANs with Single-user and Multi-user MIMO Schemes,”
    IEEE WCNC 2008, pp. 1854-1859, Las Vegas, USA, Mar. 31-Apr. 3, 2008.
12. J. W. Chong, H. Y. Hwang , C. Y. Jung, and D. K. Sung,
    “Analysis of Throughput and Energy Consumption in a ZigBee Network under the Presence of Bluetooth Interference,”
    IEEE Globecom 2007, pp. 4749-4753, Washington, DC, USA, Nov. 26-30, 2007.
13. J. W. Chong, H. Y. Hwang , C. Y. Jung, and D. K. Sung,
    “Analysis of Throughput in a ZigBee Network under the Presence of WLAN Interference,”
    IEEE ISCIT 2007, pp. 1166-1170, Sydney, Australia, Oct. 17-19, 2007.
14. B. H. Jung, J. W. Chong, S. H. Jeong, H. Y. Hwang , S. M. Kim, M. S. Kang, and D. K. Sung,
    “Ubiquitous Wearable Computer (UWC)-Aided Coexistence Algorithm in an Overlaid Network Environment of WLAN and Zigbee Networks,”
    IEEE ISWPC 2007, pp. 212-217, San Juan, Puerto Rico, Feb. 5-7, 2007.
15. S. Y. Baek, H. Y. Hwang , and D. K. Sung,
    “Performance Analysis of Scheduling-Based Systems in Rayleigh Fading Channels,”
    IEEE PIMRC 2006, pp. 1-5, Helsinki, Finland, Sept. 11-14, 2006.
16. H. Y. Hwang, N.-O. Song, D. K. Sung, and N. Moayeri,
    “Effect of Carrier Sensing Range in a Network Architecture with a Multi-Sector Antenna Based Access Point and Omni-Directional Mobile Nodes,”
    APCC/MDMC 2004, Vol. 1, pp. 258-262, Beijing, China, Aug. 29-Sept. 1, 2004.
17. C. Y. Jung, J. W. Chong, H. Y. Hwang, D. K. Sung, and J. S. Park,
    “Performance Comparison of ATM and IP based Transmission Schemes in the UTRAN,”
    IEEE WCNC 2004, Vol. 3, pp. 1709-1714, Atlanta, GA, USA, March 21-25, 2004.
18. H. Y. Hwang, N.-O. Song, D. K. Sung, and N. Moayeri,
    “Performance Evaluation of a Multi-Sector Antenna Based Access Point Network Architecture,”
    IEEE PIMRC 2003, Vol. 3, pp. 2571-2575, Beijing, China, Sept. 7-10, 2003.
19. J. W. Chong, J. H. Chung, C. Y. Jung, H. Y. Hwang, D. K. Sung, S. S. Jung, and J. S. Park,
    “QoS-Based AAL2/ATM Multiplexing Schemes in the UTRAN Iub Interface,”
    IEEE PIMRC 2003, Vol. 3, pp. 2042-2046, Beijing, China, Sept. 7-10, 2003.
20. H. Y. Hwang, S.-J. Kwon, Y. W. Chung, and D. K. Sung,
    “A Mobility Management Scheme for Reducing Power Consumption in IP-Based Wireless Networks,”
    IEEE GLOBECOM 2002, Vol. 3, pp. 2979-2983, Taipei, Taiwan, Nov. 17-21, 2002.
21. S. M. Lee, H. Y. Hwang, and D. K. Sung,
    “Group Mobility Management in Mobile IPv6 Networks,”
    APCC 2002 (The 8th APCC), pp. 133-136, Bandung, Indonesia, Sept. 17-20, 2002.
22. S.-J. Kwon, S. Y. Nam, H. Y. Hwang, and D. K. Sung,
    “Analysis of a mobility considering battery power conservation in IP-based mobile networks,”
    APCC 2002 (The 8th APCC), pp. 1-4, Bandung, Indonesia, Sept. 17-20, 2002.

Domestic Conference Papers

1. H. Y. Hwang, S.-J. Kwon, Y. W. Chung, D. K. Sung, and N. Moayeri,
   “Network Load Analysis of a Mobility Management Scheme for Reducing Power Consumption in IP-based Wireless Networks,”
   JCCI 2004 (the 14th Joint Conference on Communications and Information), Vol. III-C.2, pp. 1-4, Chugmu, Korea, April 28-30, 2004.
2. H. Y. Hwang, S.-J. Kwon, Y. W. Chung, and D. K. Sung,
   “A Mobility Management Scheme for Reducing Power Consumption in IP-Based Wireless Networks,”
   JCCI 2002 (the 12th Joint Conference on Communications and Information), Vol. I-E.4, pp. 1-4, Cheju, Korea, April 24-26, 2002.

7. Patents

International Patents

1. D. K. Sung, B. C. Jung, H. Jin, and H. Y. Hwang,
   “Scheduler and Scheduling Method for Transmitting Data in MIMO Based Wireless LAN System,”
   09173781.7-1237 (pending), Europe, Oct. 22, 2009.
2. D. K. Sung, B. C. Jung, H. Jin, and H. Y. Hwang,
   “Apparatus and Method for Determining Contention Window Size in Multi User MIMO Based Wireless LAN System,”
   09173779.1-2412 (pending), Europe, Oct. 22, 2009.
3. D. K. Sung, B. C. Jung, H. Jin, and H. Y. Hwang,
   “Method for Transmitting and Receiving Data in Multiple-Input Multiple-Output Wireless Local Area Network Environment, and a System and Apparatus for Performing the Method,”
   08153091.7-2415 (pending), Europe/U.S.A., Mar. 20, 2008.
4. D. K. Sung, B. C. Jung, H. Y. Hwang, C. Y. Jung, Y. J. Hong, and J. W. Chong,
   “Multiple Access Digital Communicating Method in Ultra-Wideband Radio Access Networks,”
   06732719.7-1246-KR2006001129 (Priority KR/28.03.05/KRA 20050025568) (pending), Europe/U.S.A./China, Mar. 28, 2006.

Domestic Patents

1. D. K. Sung, M. Park, B. C. Jung, H. Jin, and H. Y. Hwang,
   “Scheduler and Scheduling Method for Transmitting Data in MIMO Based Wireless LAN System,”
   No. 11-1041681, Korea, June 8, 2011.
2. D. K. Sung, M. Park, B. C. Jung, H. Jin, and H. Y. Hwang,
   “Apparatus and Method for Determining Minimum Contention Window Size in Multi-User MIMO Based Wireless LAN System,”
   No. 10-0988145, Korea, Oct. 8, 2010.
3. D. K. Sung, S. J. Kim, and H. Y. Hwang,
   “Wireless LAN Apparatus Based on Multiple MAC Entities,”
   No. 10-0896064, Korea, Apr. 27, 2009.
4. D. K. Sung, H. Y. Hwang, S. J. Kim, B. C. Jung, and H. Jin,
   “Wireless LAN Apparatus Based on Multiple Queues,”
   No. 10-0853695, Korea, Aug. 18, 2008.
5. D. K. Sung, B. C. Jung, H. Y. Hwang, C. Y. Jung, Y. J. Hong, and J. W. Chong,
   “Multiple Access Method in Ultra-Wideband Radio Access Networks,”
   No. 10-0835303, Korea, May 29, 2008.
6. D. K. Sung, B. C. Jung, H. Y. Hwang, C. Y. Jung, Y. J. Hong, and J. W. Chong,
   “Multiple Access Digital Communication Method in Ultra-Wideband Radio Access Networks,”
   No. 10-0829989, Korea, May 8, 2008.
7. D. K. Sung, B. C. Jung, H. Jin, and H. Y. Hwang,
   “Method of Transmitting and Receiving Data in Multi-Input Multi-Output Wireless Local Area Network Environment,”
   No. 10-0818630, Korea, Mar. 26, 2008.
8. D. K. Sung, S. H. Jeong, J. W. Chong, C. Y. Jung, H. Y. Hwang, Y. J. Kang, S. M. Kim, and M. J. Kim,
   “Apparatus and Method for Coordinating Interference between Heterogeneous Wireless Communications,”
   No. 10-0740170, Korea, July 10, 2007.
9. D. K. Sung, C. Y. Jung, H. Y. Hwang, and J. W. Chong,
   “AAL2 ATM and Packet Link Multiplexing Schemes Guaranteeing the Delay Requirements of Various Services,”
   No. 10-0523482, Korea, Oct. 17, 2005.

8. Computer Skills

C / C++ / C-Sim

- Programs for Simulations
- IEEE 802.11a/b/g DCF MAC Simulators
- IEEE 802.11e EDCA MAC Simulators

OPNET / NS2

- IEEE 802.16j Mobile Multi-hop Relay (MMR) Network Simulators
- IEEE 802.16e Mobile WiMAX Network Simulators
- GSM-GPRS Network Simulators
- UMTS-GPRS Network Simulators
- Mobile-IP based Multicast Simulators
- Multi-Sector/Smart Antenna based APs/Mobile Nodes
- Hybrid Cellular/Ad Hoc Networks

Matlab / Maple / Mathematica

- Programs for Simulations
- Programs for Numerical Analyses

Verilog / VHDL / Synopsis

- ASIC implementation of Communication Systems
- FPGA implementation of Geometric Setup Engine for 3D-Graphics Rendering

Last updated : Nov. 2011./ Copyright ⓒ 2002~2011 Ho Young Hwang. All rights reserved.