Full Publication List

2024

1. Practical Latency-aware Scheduling for Low-latency Elephant VR Flows in Wi-Fi Networks
   Shao-Jung Lu, Wei-Xun Chen, Yu-Shao Su, Yu-Shuo Chang, Yao-Wen Liu, Chi-Yu Li, Guan-Hua Tu
   IEEE PerCom'24. (Acceptance rate: 23/158 = 14.5%)

2. Transparent Third-Party Authentication With Application Mobility for 5G Mobile-Edge Computing
   Asad Ali, Ying-Dar Lin, Chi-Yu Li, Yuan-Cheng Lai
   IEEE Transactions on Network and Service Management (TNSM), Vol. 21, Issue 1, pp. 1142-1157, February 2024.

2023

1. Congestion-Avoidance Adaptation for Edge-based UAV Video Frame Delivery
   Meng-Shou Wu, Tai Tan Phan, Ping-Kuan Kao, Chi-Yu Li
   IEEE Globecom'23.

2. Dual-uCPE for High-Availability Retailer Services with Fault Toleranceand Load Balancing
   Ying-Dar Lin, Kuan-Yu Ho, Widhi Yahya, Chi-Yu Li, Yuan-Cheng Lai, Jeans H. Tseng
   IEEE Internet of Things Magazine, Vol. 6, Issue 4, pp. 88-95, December 2023.

3. When Good Turns Evil: Encrypted 5G/4G Voice Calls Can Leak Your Identities
   Jingwen Shi, Tian Xie, Guan-Hua Tu, Chunyi Peng, Chi-Yu Li, Andrew Hou, Sihan Wang, Yiwen Hu, Xinyu Lei, Min-Yue Chen, Li Xiao, Xiaoming Liu
   IEEE CNS'23. (Acceptance rate: 32/112 = 28.6%)

4. Dissecting Operational Cellular IoT Service Security: Attacks and Defenses
   Sihan Wang, Tian Xie, Min-Yue Chen, Guan-Hua Tu, Chi-Yu Li, Xinyu Lei, Po-Yi Chou, Fucheng Hsieh, Yiwen Hu, Li Xiao, Chunyi Peng
   IEEE/ACM Transactions on Networking (ToN), Early Access, September 2023.

5. Unveiling the Insecurity of Operational Cellular Emergency Services (911): Vulnerabilities, Attacks, and Countermeasures
   Yiwen Hu, Min-Yue Chen, Guan-Hua Tu, Chi-Yu Li, Sihan Wang, Jingwen Shi, Tian Xie, Xiao Li, Chunyi Peng, Zhaowei Tan, Songwu Lu
   ACM GetMobile: Mobile Computing and Communications, Vol. 27, Issue 1, pp. 39-43, March 2023. (Invited Paper)
   GetMobile Research Highlight

6. A Runtime Anomaly Detector via Service Communication Proxy for 5G Mobile Networks
   Yi-Chi Li, Ping-Tsan Liu, Yi-An Tai, Che-Hung Liu, Man-Hsin Chen, Chi-Yu Li, Guan-Hua Tu
   IEEE INFOCOM'23 Demo.

7. Remote Detection of 4G/5G UEs Vulnerable to Stealthy Call DoS
   Man-Hsin Chen, Chiung-I Wu, Yi-Chi Li, Chi-Yu Li, Guan-Hua Tu
   IEEE INFOCOM'23 Demo.

2022

1. Insecurity of Operational IMS Call Systems: Vulnerabilities, Attacks, and Countermeasures
   Yu-Han Lu, Sandy Hsin-Yu Hsiao, Chi-Yu Li, Yi-Chen Hsieh, Po-Yi Chou, Yao-Yu Li, Tian Xie, Guan-Hua Tu
   IEEE/ACM Transactions on Networking (ToN), Early Access, September 2022.

2. Uncovering Insecure Designs of Cellular Emergency Services (911)
   Yiwen Hu, Min-Yue Chen, Guan-Hua Tu, Chi-Yu Li, Sihan Wang, Jingwen Shi, Tian Xie, Xiao Li, Chunyi Peng, Zhaowei Tan, Songwu Lu
   ACM MOBICOM'22. (Acceptance rate: 56/314 = 17.83%)
   Best Community Paper Award Runner-Up
   AT&T Security Reward
   

3. Modeling Control Delays for Edge-enabled UAVs in Cellular Networks
   Yu-Hsuan Wu, Chi-Yu Li, Yi-Bing Lin, Kuochen Wang, Meng-Shou Wu
   IEEE Internet of Things Journal (IoT-J), Vol. 9, Issue 17, pp. 16222-16233, September 2022.

4. P4-TINS: P4-driven Traffic Isolation for Network Slicing with Bandwidth Guarantee and Management
   Yan-Wei Chen, Chi-Yu Li, Chien-Chao Tseng, Min-Zhi Hu
   IEEE Transactions on Network and Service Management (TNSM), Vol. 19, Issue 3, pp. 3290-3303, March 2022.

5. MPKIX: Towards More Accountable and Secure Internet Application Services via Mobile Networked Systems
   Tian Xie, Sihan Wang, Xinyu Lei, Jingwen Shi, Guan-Hua Tu, Chi-Yu Li
   IEEE Transactions on Mobile Computing (TMC), Early Access, January 2022.

6. Prioritized Traffic Shaping for Low-latency MEC Flows in MEC-enabled Cellular Networks
   Po-Hao Huang, Fu-Cheng Hsieh, Wen-Jen Hsieh, Chi-Yu Li, Ying-Dar Lin
   IEEE CCNC'22.

7. UAV-FAP: User Fairness-Driven Access Point on UAV for Wi-Fi Networks
   Yung-Chuan Wu, Hong-Rong Chang, Meng-Shou Wu, Chi-Yu Li, Kuochen Wang
   IEEE CCNC'22.

2021

1. Scalable Mobile Edge Computing: A Two-tier Multi-site Multi-server Architecture with Autoscaling and Offloading
   Ying-Dar Lin, Widhi Yahya, Chien-Ting Wang, Chi-Yu Li, Jeans H. Tseng
   IEEE Wireless Communications, Vol. 28, Issue 6, pp. 168-175, December 2021.

2. Edge-based Realtime Image Object Detection for UAV Missions
   Meng-Shou Wu, Chi-Yu Li
   WOCC'21.

3. Privacy Leakage and Protection of InputConnection Interface in Android
   Chi-Yu Li, Hsin-Yi Wang, Wei-Ching Wang, Chun-Ying Huang
   IEEE Transactions on Network and Service Management (TNSM), Vol. 18, Issue 3, pp. 3309-3323, September 2021.

4. Insecurity of Operational Cellular IoT Service: New Vulnerabilities, Attacks, and Countermeasures
   Sihan Wang, Guan-Hua Tu, Xinyu Lei, Tian Xie, Chi-Yu Li, Po-Yi Chou, Fucheng Hsieh, Yiwen Hu, Li Xiao, Chunyi Peng
   ACM MOBICOM'21. (Acceptance rate: 59/297 = 19.9%)

5. An Experience Driven Design for IEEE 802.11ac Rate Adaptation based on Reinforcement Learning
   Syuan-Cheng Chen, Chi-Yu Li, Chui-Hao Chiu
   IEEE INFOCOM'21. (Acceptance rate: 252/1266 = 19.9%)
   NSTC FutureTech Award 2022

6. Security Threats from Bitcoin Wallet Smartphone Applications: Vulnerabilities, Attacks, and Countermeasures
   Yiwen Hu, Sihan Wang, Guan-Hua Tu, Li Xiao, Tian Xie, Xinyu Lei, Chi-Yu Li
   ACM CODASPY'21.

7. The Untold Secrets of WiFi-Calling Services: Vulnerabilities, Attacks, and Countermeasures
   Tian Xie, Guan-Hua Tu, Bangjie Yin, Chi-Yu Li, Chunyi Peng, Mi Zhang, Hui Liu, Xiaoming Liu
   IEEE Transactions on Mobile Computing (TMC), Vol. 20, Issue 11, pp. 3131-3147, November 2021.

8. How Can IoT Services Pose New Security Threats in Operational Cellular Networks?
   Tian Xie, Guan-Hua Tu, Chi-Yu Li, Chunyi Peng
   IEEE Transactions on Mobile Computing (TMC), Vol. 20, Issue 8, pp. 2592-2606, August 2021.

2020

1. Proxy-based Federated Authentication: A Transparent Third-party Solution for Cloud-Edge Federation
   Ying-Dar Lin, Duc-Tai Truong, Asad Ali, Chi-Yu Li, Yuan-Cheng Lai, Thai-Mai Thi Dinh
   IEEE Network, Vol. 34, Issue 6, pp. 220-227, November 2020.

2. Practical Machine Learning-based Rate Adaptation Solution for Wi-Fi NICs: IEEE 802.11ac as a Case Study
   Chi-Yu Li, Syuan-Cheng Chen, Chien-Ting Kuo, Chui-Hao Chiu
   IEEE Transactions on Vehicular Technology (TVT), Vol. 69, Issue 9, pp. 10264-10277, September 2020.

3. Transparent 3rd-Party Authentication with Application Mobility for 5G Mobile Edge Computing
   Asad Ali, Ying-Dar Lin, Chi-Yu Li, Yuan-Cheng Lai
   EuCNC'20.

4. SecWIR: Securing Smart Home IoT Communications via Wi-Fi Routers with Embedded Intelligence
   Xinyu Lei, Guan-Hua Tu, Chi-Yu Li, Tian Xie, Mi Zhang
   ACM MOBISYS'20. (Acceptance rate: 34/175 = 19.4%)

5. 3D On-Demand Flying Mobile Communication for Millimeter Wave Heterogeneous Networks
   Kai-Ten Feng, Li-Hsiang Shen, Chi-Yu Li, Po-Tsang Huang, Sau-Hsuan Wu, Li-Chun Wang, Yi-Bing Lin, Mau-Chung Frank Chang
   IEEE Network, Vol. 34, Issue 5, pp. 198-204, September 2020.

6. Transparent AAA Security Design for Low-latency MEC-integrated Cellular Networks
   Chi-Yu Li, Ying-Dar Lin, Yuan-Cheng Lai, Hsu-Tung Chien, Yu-Sheng Huang, Po-Hao Huang, Hsueh-Yang Liu
   IEEE Transactions on Vehicular Technology (TVT), Vol. 69, Issue 3, pp. 3231-3243, March 2020.

7. Ghost Calls from Operational 4G Call Systems: IMS Vulnerability, Call DoS Attack, and Countermeasure
   Yu-Han Lu, Chi-Yu Li, Yao-Yu Li, Sandy Hsin-Yu Hsiao, Tian Xie, Guan-Hua Tu, Wei-Xun Chen
   ACM MOBICOM'20. (Acceptance rate: 62/384 = 16.15%)
   MOST FutureTech Award 2021

8. WBF-PS: WiGig Beam Fingerprinting for UAV Positioning System in GPS-denied Environments
   Pei-Yuan Hong, Chi-Yu Li, Hong-Rong Chang, YuanHao Hsueh, Kuochen Wang
   IEEE INFOCOM'20. (Acceptance rate: 268/1354 = 19.8%)

9. Deep Reinforcement Learning Based Rate Adaptation in 802.11ac Wireless Networks
   Syuan-Cheng Chen, Chi-Yu Li, Chui-Hao Chiu, Yu-Shuo Chang
   Telecom'20. Best Paper Award

2019

1. Communications and Networking Technologies for Intelligent Drone Cruisers
   Li-Chun Wang, Chuan-Chi Lai, Hong-Han Shuai, Hsin-Piao Lin, Chi-Yu Li, Teng-Hu Cheng, Chiun-Hsun Chen
   IEEE Globecom'19 Workshop on SGINs.

2. Mobility Support for Networks on Trains Using Commercial Off-the-shelf Routers
   Sandy Hsin-Yu Hsiao, Hong-Rong Chang, Yu-Han Lu, Chi-Yu Li
   IEEE APNOMS'19 Poster.

3. A Transparent MEC Testbed for 4G/5G Cellular Networks
   Yu-Sheng Huang, Po-Hao Huang, Yu-Cheng Lai, Hsu-Tung Chien, Chi-Yu Li
   Mobile Computing Workshop'19. Best Demo Award
   MOST FutureTech Award 2020

4. Exploring the Insecurity of Google Account Registration Protocol via Model Checking
   Tian Xie, Sihan Wang, Guan-Hua Tu, Chi-Yu Li, Xinyu Lei
   IEEE SSCI'19.

2018

1. Setting Malicious Flow Entries Against SDN Operations: Attacks and Countermeasures
   Cheng-Hsu Lin, Chi-Yu Li, Kuochen Wang
   IEEE DSC'18.

2. Mobile Edge Computing Platform Deployment in 4G LTE Networks: A Middlebox Approach
   Chi-Yu Li, Hsueh-Yang Liu, Po-Hao Huang, Hsu-Tung Chien, Guan-Hua Tu, Pei-Yuan Hong, Ying-Dar Lin
   USENIX HotEdge'18.

3. A Fast Converging Mechanism for Load Balancing Among SDN Multiple Controllers
   Yan-Ting Chen, Chi-Yu Li, Kuochen Wang
   IEEE ISCC'18.

4. The Dark Side of Operational Wi-Fi Calling Services
   Tian Xie, Guan-Hua Tu, Chi-Yu Li, Chunyi Peng, Jaiwei Li, Mi Zhang
   IEEE CNS'18. (Acceptance rate: 51/181 = 28.1%)
   Best Paper Award
   Google Security Reward

5. The Insecurity of Home Digital Voice Assistants - Vulnerabilities, Attacks and Countermeasures
   Xinyu Lei, Guan-Hua Tu, Alex Liu, Chi-Yu Li, Tian Xie
   IEEE CNS'18. (Acceptance rate: 51/181 = 28.1%)

6. How Voice Service Threatens Cellular-connected IoT Devices in the Operational 4G LTE Networks
   Tian Xie, Chi-Yu Li, Jiliang Tang, Guan-Hua Tu
   IEEE ICC'18.

7. V2PSense: Enabling Cellular-based V2P Collision Warning Service Through Mobile Sensing
   Chi-Yu Li, Giovanni Salinas, Po-Hao Huang, Guan-Hua Tu, Guo-Huang Hsu, Tien-Yuan Hsieh
   IEEE ICC'18.

2017

1. ReSDN: A Lightweight Solution for Data-plane State Recovery in Software-defined Networks
   Guan-Rong Chen, Chi-Yu Li, Kuochen Wang
   IEEE ICC'17.

2. Enabling Seamless WiGig/WiFi Handovers in Tri-band Wireless Systems
   Yao-Yu Li, Chi-Yu Li, Wei-Han Chen, Chia-Jui Yeh, Kuochen Wang
   IEEE ICNP'17 Demo.

2016

1. New Security Threats Caused by IMS-based SMS Service in 4G LTE Networks
   Guan-Hua Tu*, Chi-Yu Li* (*:Co-Primary), Chunyi Peng, Yuanjie Li, Songwu Lu
   ACM CCS'16. (Acceptance rate: 137/837 = 16.4%)
   Facebook Security Reward

2. VoLTE*: A Lightweight Voice Solution to 4G LTE Networks
   Guan-Hua Tu*, Chi-Yu Li* (*:Co-Primary), Chunyi Peng, Zenwen Yuan, Yuanjie Li,
   Xiaohu Zhao, Songwu Lu
   ACM HotMobile'16.

3. An Energy Efficiency Perspective on Rate Adaptation for 802.11n NIC
   Chi-Yu Li, Chunyi Peng, Peng Cheng, Songwu Lu, Xinbing Wang, Fengyuan Ren, Tao Wang
   IEEE Transactions on Mobile Computing (TMC), vol. 15, no. 6, p1333-1347, 2016.

4. Detecting Problematic Control-Plane Protocol Interactions in Mobile Networks
   Guan-Hua Tu, Yuanjie Li, Chunyi Peng, Chi-Yu Li, Songwu Lu
   IEEE/ACM Transactions on Networking (TON), vol. 24, no. 2, p1209-1222, 2016.

Before 2016

1. Insecurity of Voice Solution VoLTE in LTE Mobile Networks
   Chi-Yu Li, Guan-Hua Tu, Chunyi Peng, Zengwen Yuan, Yuanjie Li, Songwu Lu, Xinbing Wang
   ACM CCS'15.

2. How Voice Call Technology Poses Security Threats in 4G LTE Networks
   Guan-Hua Tu, Chi-Yu Li, Chunyi Peng, Songwu Lu
   IEEE CNS'15.

3. Latency-Aware Rate Adaptation in 802.11n Home Networks
   Chi-Yu Li, Chunyi Peng, Guan-Hua Tu, Songwu Lu, Xinbing Wang, Ranveer Chandra
   IEEE INFOCOM'15.

4. Real Threats to Your Data Bills: Security Loopholes and Defense in Mobile Data Charging
   Chunyi Peng, Chi-Yu Li, Guan-Hua Tu, Hongyi Wang, Songwu Lu
   ACM CCS'14.

5. Control-Plane Protocol Interactions in Cellular Networks
   Guan-Hua Tu, Yuanjie Li, Chunyi Peng, Chi-Yu Li, Hongyi Wang, Songwu Lu
   ACM SIGCOMM'14.

6. Collaborative Energy Save for MIMO 802.11 Wireless Networks
   Ioannis Pefkianakis, Chi-Yu Li, Chunyi Peng, Suk-Bok Lee, Songwu Lu
   IEEE ICNP'13.

7. How Voice Calls Affect Data in Operational LTE Networks
   Guan-Hua Tu, Chunyi Peng, Hongyi Wang, Chi-Yu Li, Songwu Lu
   ACM MOBICOM'13.

8. Accounting for Roaming Users on Mobile Data Access: Issues and Root Causes
   Guan-Hua Tu, Chunyi Peng, Chi-Yu Li, Xingyu Ma, Songwu Lu
   ACM MOBISYS'13.

9. Mobile Data Charging: New Attacks and Countermeasures
   Chunyi Peng, Chi-Yu Li, Guan-Hua Tu, Songwu Lu, Lixia Zhang
   ACM CCS'12.

10. Can We Pay for What We Get in 3G Data Access?
    Chunyi Peng, Guan-Hua Tu, Chi-Yu Li, Songwu Lu
    ACM MOBICOM'12.

11. Energy-based Rate Adaptation for 802.11n
    Chi-Yu Li, Chunyi Peng, Songwu Lu, Xinbing Wang
    ACM MOBICOM'12.

12. A Multimedia Service Migration Protocol for Single User Multiple Devices
    Chi-Yu Li, Ioannis Pefkianakis, Bojie Li, Chenghui Peng, Wei Zhang, Songwu Lu
    IEEE ICC'12.

13. What is Wrong/Right with IEEE 802.11n Spatial Multiplexing Power Save Feature?
    Ioannis Pefkianakis, Chi-Yu Li, Songwu Lu
    IEEE ICNP'12.

14. A TCP Service Migration Protocol for Single User Multiple Devices
    Chi-Yu Li, Ioannis Pefkianakis, Bojie Li, Chenghui Peng, Wei Zhang, Songwu Lu
    IARIA UBICOMM'11.

15. Release-Time-Based Multi-Channel MAC Protocol for Wireless Mesh Networks
    Andy An-Kai Jeng, Rong-Hong Jan, Chi-Yu Li, Chien Chen
    Computer Networks, vol. 55, no. 9, p2176-2195, 2011.

16. Implementing Instant Messaging Using Named Data
    Jiangzhe Wang, Chunyi Peng, Chi-Yu Li, Eric Osterweil, Pei-Chun Cheng, Lixia Zhang
    AINTEC'10.

17. A MAC Protocol for Multi-channel Multi-interface Wireless Mesh Network Using Hybrid Channel
    Assignment Scheme
    Chi-Yu Li, An-Kai Jeng, Rong-Hong Jan
    Journal of Information Science and Engineering, vol 23, no. 4, p1041-1055, 2007.

18. A Medium Access Control Protocol for Multi-channel Multi-interface Wireless Mesh Network
    Chi-Yu Li, An-Kai Jeng, Rong-Hong Jan
    WASN'06 Best Paper Award.

Ph.D. Dissertation

1. Toward Customizable Wi-Fi
   Chi-Yu Li
   Computer Science, University of California, Los Angeles, 2015.