4 papers
Towards Operator-Empowered Vulnerability Hotfixing for 5G Radio Access Networks
Dong Hyeok Kim, Xin Zhe Khooi, Hocheol Nam +4
Cellular protocol vulnerabilities can remain exploitable for months or years while standards bodies, vendors, and mobile network operators (MNOs) coordinate permanent fixes. We pre…
Symphony: Taming Step Misalignments in the Network for Ring-based Collective Operations
Yuze Jin, Xin Zhe Khooi, Ruyi Yao +1
Ring-based collective operations are widely used in distributed AI training due to their efficient bandwidth utilization. While ring communication excels at pipelining, its perform…
ProtO-RU: An O-RAN Split-7.2 Radio Unit using SDRs
Zhiyu Zhou, Xin Zhe Khooi, Satis Kumar Permal +1
We present ProtO-RU, the first open source, software-defined O-RAN Split-7.2 Radio Unit built using SDRs and commodity CPUs. Unlike proprietary hardware-based commercial O-RUs, Pro…
The Case for Accelerating BFT Protocols Using In-Network Ordering
Guangda Sun, Xin Zhe Khooi, Yunfan Li +2
Mission critical systems deployed in data centers today are facing more sophisticated failures. Byzantine fault tolerant (BFT) protocols are capable of masking these types of failu…