Bangbo Liang梁帮博

PHD STUDENT · HUNAN UNIVERSITY

Hi, I'm
Bangbo Liang.梁帮博

Exploring the systems
that connect us.

I study high-performance networks and computer architecture, with a focus on optical interconnects for distributed AI training. Here, I share my research, things I build, and moments along the way.

Explore my research A little about me
NEW RESEARCH Meet LACE: lane-level optical scheduling
Bangbo Liang working with a laptop in a server room
RESEARCHER & CURIOUS HUMANBased in Changsha, China
CURRENTLY THINKING ABOUT
Optical networksHigh-performance systemsHardware–software co-design

01 / RESEARCH & PROJECTS

Making connections.
Building understanding.

From optical switching to collective communication, I'm interested in how we make data center networks work better.

LATEST RESEARCHARXIV PREPRINT · 2026

LACEBreaking the duplex barrier.

Optical paths are directional. Our new work schedules transmit and receive lanes independently to match the communication demands of LLM training.

Read the research story Read the paper
LACE reduces replay time from 28.03 to 15.60 seconds and GPT-2 epoch time from 3.61 to 2.84 hours in the fixed-topology testbed.
Fixed-topology testbed · Original paper, Figure 5
1.21–2.04×
Simulated communication speedup
LLaMA-3.1 70B & 405B · 16 × 400G ports/server
1.80×
Communication replay speedup
Three-server fixed-topology testbed
1.27×
GPT-2 training speedup
Three-server fixed-topology testbed

Compared with ACTINA. Simulation and hardware experiments are separate evaluations.

PUBLICATION2025

Rethinking networks for
intelligent computing.

Full-Stack Technology White Paper on Optical-Electrical Hybrid Switching Networks for Intelligent Computing Centers.

Read the white paper
OPEN SOURCE2024

Small intervals.
Better insights.

A lightweight RDMA performance testing tool with microsecond-level test cycles and configurable operations.

Explore RDMA-perftest
01

High-performance networks

Data center interconnects and efficient communication.

02

Optical networking

Protocol stacks and collective communication optimization.

03

Computer architecture

Exploring the boundary between hardware and software.

02 / NOTES & THOUGHTS

A work in progress.

All writing

Research notes, code, and the occasional detour into life.

03 / BEYOND THE SCREEN

A different kind of focus.

Photo journal

A camera, a little wandering, and the things worth slowing down for. Shot on my Nikon D7200.

Sunlight filtering through willow branches beside a lake
01 — Light & leaves
City buildings and blue sky reflected in a still lake
02 — A moment of stillness
Willow trees around a peaceful lake
03 — The scenic route