Le (Lex) Xia
Le (Lex) Xia
Postdoctoral Associate
Postdoctoral Associate
Bradley Department of Electrical and Computer Engineering
Virginia Tech, Blacksburg, VA 24061
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Contact
Contact
Email: lexia@vt.edu
About Me
About Me
I am currently a postdoctoral associate at Virginia Tech, U.S., working with Prof. Rose Qingyang Hu. I received my Ph.D. from the University of Glasgow, U.K., in 2024, advised by Dr. Yao Sun and co-advised by Prof. Muhammad A. Imran. Prior to that, I received my B.Eng. and M.Eng. in 2017 and 2020, respectively, both from UESTC. I have published over 20 papers with a total of 700+ citations and an h&i10-index of 13, covering multiple top-tier IEEE journals/magazines/conferences. I was a recipient of the Conference Travel Grant for ICC'2025 from IEEE ComSoc, a recipient of the Full Ph.D. Scholarship (2020-2024) from the European Institute of Innovation and Technology in 2020, and a recipient of the National Scholarship (top 0.2%) in 2019.
Research Interests
Research Interests
I have broad interests in various technical fields and layers toward building next-generation wireless systems with AI.
In a nutshell, my research spans the areas of
Agentic O-RAN/AI-RAN
Embodied AI Agents for RAN
Semantic Communications
RAN Resource Management
Recent Updates
Recent Updates
[Oct 2026]: Our new article titled "Control-compute governance in agentic AI-RAN: AI agents as both controllers and workloads" has been submitted to IEEE Wireless Communications for peer review!
[Aug 2026]: Our new paper titled "xTRUCE: A provably safe arbiter for multi-xApp conflict mitigation in agentic O-RAN" has been submitted to IEEE Journal on Selected Areas in Communications for peer review!
[Jul 2026]: I just finished a two-month visit to the University of Georgia under the invitation of Dr. Haijian Sun, conducting both theoretical and over-the-air research on Agentic O-RAN with his lab toward an upcoming paper submission!
[Oct 2025]: A new paper titled "Joint Knowledge and Power Management for Secure Semantic Communication Networks" has been accepted for publication by IEEE Trans. on Vehicular Technology!
[Sept 2025]: A new paper titled "Joint power and spectrum orchestration for D2D semantic communication underlying energy-efficient cellular networks" has been accepted for publication by IEEE Trans. on Wireless Communications!
[May 2025]: I have been awarded the Conference Travel Grant (CTG) for IEEE ICC'2025!
[Mar 2025]: A new magazine paper titled "Knowledge-assisted privacy preserving in semantic communication" has been accepted for publication by IEEE Wireless Communications!
[Jan 2025]: A new conference paper titled "Energy efficiency maximization in D2D semantic communication enabled cellular networks" has been accepted for presentation at IEEE ICC'2025, 8–12 June, Montreal, Canada!
[Dec 2024]: I got my Ph.D. from the University of Glasgow!
Highlighted Works
Highlighted Works
I. Agentic O-RAN and AI-RAN
I. Agentic O-RAN and AI-RAN
xTRUCE · Safe Multi-xApp Control in Agentic O-RAN
Preprint · Under review · 2026
Priority-aware arbitration resolves conflicting xApp proposals through conflict certificates and verified fallback actions.
Simulations use live LLM xApps, while OTA experiments assess control-action compliance and timing.
Contract · Control-Compute Governance in Agentic AI-RAN
Preprint · Under review · 2026
The AI agent both controls the gNB and consumes its compute resources.
A control-compute contract coordinates LLM inference admission with verified gNB control, accounting for action-induced PHY workload changes.
OTA measurements expose compute contention, while an OTA-calibrated simulation evaluates the effectiveness of the contract.
II. Semantic Communications
II. Semantic Communications
GAI-SCN · Generative AI for Semantic Communication
IEEE Wireless Communications · 2025
A novel architecture integrates generative AI into semantic communication across cloud, edge, and device resources.
A three-stage workflow connects semantic delivery with wireless transmission, supported by an illustrative simulation study.
HSB-Net · Resource Optimization in Hybrid Semantic/Bit Networks
IEEE Transactions on Communications · 2025
Joint optimization of user association, mode selection, and bandwidth allocation in hybrid semantic/bit networks.
A tandem-queue model characterizes semantic packet delay and loss, supporting optimal and low-complexity resource management that maximizes message throughput.
SCVN · Reliable Semantic Communications for Vehicles
IEEE Transactions on Wireless Communications · 2024
Joint knowledge-base construction and service pairing for semantic communication in vehicular networks.
The design combines optimization guarantees with simulations of semantic queuing delay and reliability.
WiserVR · Semantic Communication for Wireless VR
IEEE Wireless Communications · 2023
WiserVR delivers wireless 360° video through efficient semantic encoding and reconstruction.
Semantic location graphs capture object relationships in each video frame, while joint semantic-channel coding and knowledge sharing support reliable recovery with reduced transmission traffic and latency.
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