multimedia, computer networks

Oct. 2020 - Present
The University of Electro-Communications, Associate Professor

Deep Reinforcement Learning for Optimizing Multi-hop Distributed Collaborative Task Offloading in R2X
Wei Zhao; Tangjie Weng; Yu Cheng; Zhi Liu; Nei Kato
IEEE Transactions on Vehicular Technology, Institute of Electrical and Electronics Engineers (IEEE), 1-15, 2025
Scientific journal

An adaptive asynchronous federated learning framework for heterogeneous Internet of things
Weidong Zhang; Dongshang Deng; Xuangou Wu; Wei Zhao; Zhi Liu; Tao Zhang; Jiawen Kang; Dusit Niyato
Information Sciences, Elsevier BV, 689, 121458-121458, Sep. 2024, Peer-reviwed
Scientific journal

Asynchronous DRL Based Multi-Hop Task Offloading in RSU-Assisted IoV Networks
Wei Zhao; Yu Cheng; Zhi Liu; Xuangou Wu; Nei Kato
Corresponding, IEEE Transactions on Cognitive Communications and Networking, Institute of Electrical and Electronics Engineers (IEEE), 1-1, Jul. 2024, Peer-reviwed
Scientific journal

EHTA: An Environment-cost-based Heterogeneous Task Allocation in Vehicular Crowdsensing
Yuyang Lu; Xingfu Wang; Ammar Hawbani; Ping Liu; Liang Zhao; Zhi Liu
IEEE Transactions on Mobile Computing, Institute of Electrical and Electronics Engineers (IEEE), 1-14, May 2024, Peer-reviwed
Scientific journal

Quantum Computing in Wireless Communications and Networking: A Tutorial-Cum-Survey
Wei Zhao; Tangjie Weng; Yue Ruan; Zhi Liu; Xuangou Wu; Xiao Zheng; Nei Kato
IEEE Communications Surveys & Tutorials, Institute of Electrical and Electronics Engineers (IEEE), 1-1, 2024
Scientific journal

Power-Efficient Wireless Streaming of Multi-Quality Tiled 360 VR Video in MIMO-OFDMA Systems
Chengjun Guo; Lingzhi Zhao; Ying Cui; Zhi Liu; Derrick Wing Kwan Ng
IEEE Transactions on Wireless Communications, Institute of Electrical and Electronics Engineers (IEEE), 20, 8, 5408-5422, Aug. 2021, Peer-reviwed
Scientific journal

BESURE: Blockchain-Based Cloud-Assisted eHealth System with Secure Data Provenance
Shiyu Li; Yuan Zhang; Chunxiang Xu; Nan Cheng; Zhi Liu; Xuemin Sherman Shen
2021 IEEE/ACM 29th International Symposium on Quality of Service (IWQOS), IEEE, 25 Jun. 2021, Peer-reviwed
International conference proceedings

IMP: Impedance Matching Enhanced Power-Delivered-to-Load Optimization for Magnetic MIMO Wireless Power Transfer System
Wangqiu Zhou; Hao Zhou; Wenxiong Hua; Fengyu Zhou; Xiang Cui; Suhua Tang; Zhi Liu; Xiang-Yang Li
2021 IEEE/ACM 29th International Symposium on Quality of Service (IWQOS), IEEE, 25 Jun. 2021, Peer-reviwed
International conference proceedings

LCL: Light Contactless Low-delay Load Monitoring via Compressive Attentional Multi-label Learning
XiaoYu Wang; Hao Zhou; Nikolaos M. Freris; Wangqiu Zhou; Xing Guo; Zhi Liu; Yusheng Ji; Xiang-Yang Li
2021 IEEE/ACM 29th International Symposium on Quality of Service (IWQOS), IEEE, 25 Jun. 2021, Peer-reviwed
International conference proceedings

A Novel Cost Optimization Strategy for SDN-Enabled UAV-Assisted Vehicular Computation Offloading
Liang Zhao; Kaiqi Yang; Zhiyuan Tan; Xianwei Li; Suraj Sharma; Zhi Liu
IEEE Transactions on Intelligent Transportation Systems, Institute of Electrical and Electronics Engineers (IEEE), 22, 6, 3664-3674, Jun. 2021, Peer-reviwed
Scientific journal

WiONE: One-Shot Learning for Environment-Robust Device-Free User Authentication via Commodity Wi-Fi in Man–Machine System
Yu Gu; Huan Yan; Mianxiong Dong; Meng Wang; Xiang Zhang; Zhi Liu; Fuji Ren
IEEE Transactions on Computational Social Systems, Institute of Electrical and Electronics Engineers (IEEE), 8, 3, 630-642, Jun. 2021, Peer-reviwed
Scientific journal

DRLE: Decentralized Reinforcement Learning at the Edge for Traffic Light Control in the IoV
Pengyuan Zhou; Xianfu Chen; Zhi Liu; Tristan Braud; Pan Hui; Jussi Kangasharju
IEEE Transactions on Intelligent Transportation Systems, Institute of Electrical and Electronics Engineers (IEEE), 22, 4, 2262-2273, Apr. 2021, Peer-reviwed
Scientific journal

Optimal Adaptive Streaming of A Scalable Multi-view Video via Rate Splitting and SIC
Wuyang Jiang; Chencheng Ye; Lingzhi Zhao; Ying Cui; Zhi Liu
IEICE Communications Express, Institute of Electronics, Information and Communications Engineers (IEICE), 2021, Peer-reviwed
Scientific journal

3-D Facial Expression Recognition via Attention-Based Multichannel Data Fusion Network
Yu Gu; Huan Yan; Xiang Zhang; Zhi Liu; Fuji Ren
IEEE Transactions on Instrumentation and Measurement, Institute of Electrical and Electronics Engineers (IEEE), 70, 1-10, 2021, Peer-reviwed
Scientific journal

A Near-optimal Protocol for the Subset Selection Problem in RFID Systems
Xiujun Wang; Zhi Liu; Susumu Ishihara; Zhe Dang; Jie Li
Corresponding, 2020 16th International Conference on Mobility, Sensing and Networking (MSN), IEEE, Dec. 2020, Peer-reviwed
International conference proceedings

Age of Information-Aware Resource Management in UAV-Assisted Mobile-Edge Computing Systems
Xianfu Chen; Celimuge Wu; Tao Chen; Zhi Liu; Mehdi Bennis; Yusheng Ji
GLOBECOM 2020 - 2020 IEEE Global Communications Conference, IEEE, Dec. 2020, Peer-reviwed
International conference proceedings, English

Towards mmWave Localization with Controllable Reflectors in NLoS Scenarios
Shan Wang; Zengyu Song; Hao Zhou; Xing Guo; Jun Xu; Zhi Liu
2020 16th International Conference on Mobility, Sensing and Networking (MSN), IEEE, Dec. 2020
International conference proceedings

FD-Band: A Ubiquitous Fall Detection System Using Low-Cost COTS Smart Band
Kaiwen Guo; Yingling Quan; Hao Zhou; Zhi Liu; Panlong Yang; Xiang-Yang Li
2020 16th International Conference on Mobility, Sensing and Networking (MSN), IEEE, Dec. 2020
International conference proceedings

Collaborative Learning of Communication Routes in Edge-enabled Multi-access Vehicular Environment
Celimuge Wu; Zhi Liu; Fuqiang Liu; Tsutomu Yoshinaga; Yusheng Ji; Jie Li
IEEE Transactions on Cognitive Communications and Networking, 6, 4, 1155-1165, Dec. 2020, Peer-reviwed
Scientific journal, English

Age of Information Aware Radio Resource Management in Vehicular Networks: A Proactive Deep Reinforcement Learning Perspective
Xianfu Chen; Celimuge Wu; Tao Chen; Honggang Zhang; Zhi Liu; Yan Zhang; Mehdi Bennis
IEEE Transactions on Wireless Communications, Institute of Electrical and Electronics Engineers (IEEE), 19, 4, 2268-2281, Apr. 2020
Scientific journal

QoE-Driven Coupled Uplink and Downlink Rate Adaptation for 360-Degree Video Live Streaming
Jie Li; Ransheng Feng; Wei Sun; Zhi Liu; Qiyue Li
IEEE Communications Letters, Institute of Electrical and Electronics Engineers (IEEE), 24, 4, 863-867, Apr. 2020
Scientific journal

Optimal Multi-View Video Transmission in Multiuser Wireless Networks by Exploiting Natural and View Synthesis-Enabled Multicast Opportunities
Wei Xu; Ying Cui; Zhi Liu
IEEE Transactions on Communications, Institute of Electrical and Electronics Engineers (IEEE), 68, 3, 1494-1507, Mar. 2020
Scientific journal

Optimal Multi-View Video Transmission in OFDMA Systems
Wei Xu; Ying Cui; Zhi Liu; Haoran Li
IEEE Communications Letters, Institute of Electrical and Electronics Engineers (IEEE), 24, 3, 667-671, Mar. 2020
Scientific journal

Implementation of video data transmission protocol for a narrow sewer pipe screening system using drifting wireless cameras
Susumu Ishihara; Zhi Liu; Seiya Tachibana; Tomonori Yasuda
International Conference on Information Networking, IEEE Computer Society, 2020-, 384-389, 01 Jan. 2020
International conference proceedings, English

Edge-Based V2X communications with big data intelligence
Siri Guleng; Celimuge Wu; Zhi Liu; Xianfu Chen
IEEE Access, Institute of Electrical and Electronics Engineers Inc., 8, 8603-8613, 2020
Scientific journal, English

AF-DCGAN: AmplitudeFeature Deep Convolutional GAN for Fingerprint Construction in Indoor Localization System
Qiyue Li; Heng Qu; Zhi Liu; Nana Zhou; Wei Sun; Jie li
IEEE Transactions on Emerging Topics in Computational Intelligence, Oct. 2019, Peer-reviwed

The Evolution of Resource Sharing: From One-Sided Market to Two-Sided Market
Yanru Zhang; Yingjie Zhou; Zhi Liu; Bidushi Barua; Duy H.N. Nguyen
IEEE Wireless Communication, Oct. 2019, Peer-reviwed

The Evolution of Resource Sharing: From One-Sided Market to Two-Sided Market,
Yanru Zhang; Yingjie Zhou; Zhi Liu; Bidushi Barua; Duy H.N. Nguyen
IEEE Wireless Communication, Sep. 2019, Peer-reviwed

SleepGuardian: An RF-based Healthcare System Guarding Your Sleep from Afar
Yu Gu; Yantong Wang; Zhi Liu; Jun Liu; Jie Li
IEEE Network, Sep. 2019, Peer-reviwed

Mining Mobile Intelligence for Wireless Systems: A Deep Neural Network Approach
Han Hu; Zhi Liu; Jianping An
IEEE Computational Intelligence Magazine, Sep. 2019, Peer-reviwed

BeSense: Leveraging WiFi Channel Data and Computational Intelligence for Behavior Analysis
Yu Gu; Xiang Zhang; Zhi Liu; Fuji Ren
IEEE Computational Intelligence Magazine, Sep. 2019, Peer-reviwed

Enhancing the performance of cuckoo search algorithm with Multi-learning strategies
Li Huang; Xiao Zheng; Zhi Liu; Jun Huan
IEICE Transactions on Information and Systems, Sep. 2019, Peer-reviwed

Optimal Resource Allocation for Scalable Mobile Edge Computing
Yunlong Gao; Ying Cui; Xinyun Wang; Zhi Liu
IEEE Communication Letter, Sep. 2019, Peer-reviwed

Joint Optimization of Computing Resources and Data Allocation for Mobile Edge Computing (MEC): An Online Approach
Xun Shao; Go Hasegawa; Noriaki Kamiyama; Zhi Liu; Hiroshi Masui; Yusheng Ji
in Proceedings of 28th International Conference on Computer Communications and Networks (ICCCN 2019), Aug. 2019, Peer-reviwed
International conference proceedings, English

Approximate range emptiness in constant time for IoT data streams over sliding windows
Xiujun Wang; Zhi Liu; Yangzhao Yang; Xun Shao; Yu Gu; Susumu Ishihara
Proceedings - International Conference on Computer Communications and Networks, ICCCN, Institute of Electrical and Electronics Engineers Inc., 2019-, 01 Jul. 2019
International conference proceedings, English

A Contactless and Fine-Grained Sleep Monitoring System Leveraging WiFi Channel Response
Yu Gu; Chenyu Zhang; Yantong Wang; Zhi Liu; Yusheng Ji; Jie Li
IEEE International Conference on Communications, Institute of Electrical and Electronics Engineers Inc., 2019-, 01 May 2019
International conference proceedings, English

A competitive approximation algorithm for data allocation problem in heterogenous mobile edge computing
Xun Shao; Zhi Liu; Mianxiong Dong; Hiroshi Masui; Yusheng Ji
IEEE Vehicular Technology Conference, Institute of Electrical and Electronics Engineers Inc., 2019-, 01 Apr. 2019
International conference proceedings, English

A New DY Con- jugate Gradient Method and Applications to Image Denoising,
Wei Xue; Junhong Ren; Xiao Zheng; Zhi Liu; Yueyong Liang
IEICE Trans- actions on Information and Systems, E101-D, 12, 2984-2990, Mar. 2019, Peer-reviwed

Trajectory Based Incentive Mechanisms for Crowdsourcing Indoor Localization with Privacy Protection
Wei Li; Cheng Zhang; Zhi Liu; Yoshiaki Tanaka
IEEE Access, 54042-54051, Mar. 2019, Peer-reviwed

Optimal Multicast of Tiled 360 VR Video in OFDMA Systems
Chengjun Guo; Ying Cui; Zhi Liu
IEEE Communication Letter, Mar. 2019, Peer-reviwed

Optimal Pricing for Service Provision in Heterogeneous IaaS Cloud Market
Xianwei Li; Bo Gu; Cheng Zhang; Zhi Liu; Kyoko Yamori; Yoshiaki Tanaka
IEICE Transactions on Communications, E102-B, Mar. 2019, Peer-reviwed

EmoSense: Computational Intelligence Driven Emotion Sensing via Wireless Channel Dat
Yu Gu; Yantong Wang; Tao Liu; Yusheng Ji; Zhi Liu; Peng Li; Xiaoyan Wang; Fuji Re
IEEE Transactions on Emerging Topics in Computational Intelligence, Mar. 2019, Peer-reviwed

Mobile Edge Computing for the Internet of Vehicles: Offloading Framework and Job Scheduling
Jingyun Feng; Zhi Liu; Celimuge Wu; Yusheng Ji
IEEE Vehicular Technology Magazine, Institute of Electrical and Electronics Engineers Inc., 14, 1, 28-36, 01 Mar. 2019
Scientific journal, English

Near-Optimal Data Structure for Approximate Range Emptiness Problem in Information-Centric Internet of Things
Xiujun Wang; Zhi Liu; Yan Gao; Xiao Zheng; Xianfu Chen; Celimuge Wu
IEEE Access, Institute of Electrical and Electronics Engineers Inc., 7, 21857-21869, 2019
Scientific journal, English

Accurate Position Estimation of a Drifting Wireless LAN Communication Device in a 200mm-Diameter Small Sewer Pipe.
Yuki Takei; Zhi Liu 0002; Hiroaki Sawano; Susumu Ishihara
33rd International Conference on Information Networking(ICOIN), IEEE, 19-24, 2019
International conference proceedings

Multi-Access Mobile Edge Computing for Internet of Vehicles
Jingyun Feng; Zhi Liu; Celimuge Wu; Yusheng Ji
IEEE Vehicular Technology Magazine, Nov. 2018, Peer-reviwed

Spatial Intelligence toward Trustworthy Vehicular IoT
Celimuge Wu; Zhi Liu; Di Zhang; Tsutomu Yoshinaga; Yusheng Ji
IEEE Communications Magazine, 56, 10, 22-27, Oct. 2018, Peer-reviwed
Scientific journal, English

Optimal Multicast of Tiled 360 VR Video
Chengjun Guo; Ying Cui; Zhi Liu
IEEE Wireless Communication Letter, Aug. 2018, Peer-reviwed

Topology Mapping for Popularity-Aware Video Caching in Content-Centric Network
Zhi Liu; Mianxiong Dong; Susumu Ishihara; Cheng Zhang; Bo Gu; Yusheng Ji; Yoshiaki Tanaka
IEEE International Conference on Communications, Institute of Electrical and Electronics Engineers Inc., 2018-, 27 Jul. 2018
International conference proceedings, English

Spatial Intelligence towards Smart Vehicles
Celimuge Wu; Zhi Liu; Di Zhang; Tsutomu Yoshinaga; Yusheng Ji
IEEE Communication Magazine, Jul. 2018, Peer-reviwed

Sleepy: Adaptive sleep monitoring from afar with commodity WiFi infrastructures
Yu Gu; Jinhai Zhan; Zhi Liu; Jie Li; Yusheng Ji; Xiaoyan Wang
IEEE Wireless Communications and Networking Conference, WCNC, Institute of Electrical and Electronics Engineers Inc., 2018-, 1-5, 08 Jun. 2018
International conference proceedings, English

Resource allocation for SVC streaming over cooperative vehicular networks
Hao Zhou; Xiaoyan Wang; Zhi Liu; Shigeki Yamada; Yusheng Ji
IEEE Transactions on Vehicular Technology, Jun. 2018, Peer-reviwed

Effect of channel bonding and parallel data transmission with IEEE802.11n wireless LAN in a small sewer pipe
Yuki Takei; Zhi Liu; Susumu Ishihara
International Conference on Information Networking, IEEE Computer Society, 2018-, 223-228, 19 Apr. 2018
International conference proceedings, English

Smart Technologies for Emergency Response & Disaster Management
Zhi Liu; Kaoru Ota
Joint work, IGI Global, Jul. 2017

Oct. 2012
IPSJ

2010
IEICE

Context-aware, Resource Requirement-based Wireless Access Network Densification
Ji Yusheng
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, National Institute of Informatics, Grant-in-Aid for Scientific Research (B), The purpose of this research project is by exploring context-aware, resource requirement-driven network densification to realize ultra-high capacity and massive access capability for next-generation wireless access networks. To this end, we have tackled on the resource management and inter-cell interference mitigation problems in heterogeneous wireless cellular networks, and proposed optimization algorithms for dynamic cell-range expansion, users' cell selection, and dynamic network clustering with base station sleeping and shared caching functions. We have also studied on online resource management algorithms for mobile edge computing to provide computing and data caching capabilities in wireless access networks. By leveraging reinforcement learning and fussy logic based techniques, we have also proposed low-overhead clustering based routing protocols for context-aware data delivering in vehicular networks utilizing multiple wireless access technologies., 16H02817
01 Apr. 2016 - 31 Mar. 2019