Time-Sensitive Networking over Low-Latency Optical Data Center Fabrics
Keywords:
time-sensitive networking; optical data center fabrics; low-latency interconnects; clock synchronization; hollow-core fiber; deterministic networking; governance; sustainability; fairness; robustnessAbstract
The convergence of time-sensitive networking and low-latency optical data center fabrics represents a significant architectural shift in how deterministic communication, massive parallelism, and energy-aware infrastructure are coordinated. Time-sensitive networking offers mechanisms for bounded latency, scheduled traffic, clock synchronization, and resource reservation, but its original deployment context was largely industrial and automotive Ethernet. Data centers, by contrast, are characterized by high fan-in, bursty workloads, multi-tenant isolation, and rapid reconfiguration. Optical fabrics introduce wavelength switching, spatial parallelism, hollow-core fiber, and low-loss propagation, which can reduce latency and energy per bit while also complicating synchronization, scheduling, and fault management. This paper examines the system-level implications of running time-sensitive networking over low-latency optical data center fabrics. It analyzes architectural trade-offs between packet-switched and circuit-switched domains, the role of centralized and distributed control, and the governance challenges that arise when deterministic guarantees must coexist with fair multi-tenant access. The discussion also considers robustness under link and switch failures, sustainability pressures, and policy questions related to transparency, accountability, and infrastructure ownership. The paper argues that optical data center fabrics can extend time-sensitive networking beyond niche industrial use cases, but only if synchronization, scheduling, control-plane semantics, and operational governance are co-designed rather than treated as separate optimization problems. The conclusion outlines research directions for reconfigurable optical determinism, cross-domain standards, and equitable resource allocation in future data center ecosystems.
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