Nonblocking Clos networks of multiple ROADM rings for mega data centers

Area of Science:

• Optical networking
• Data center architecture
• Network scalability

Background:

• Mega data centers (DCs) require high bandwidth optical networks.
• Existing solutions lack scalability and contention-free performance for growing DCs.

Purpose of the Study:

• To propose scalable and nonblocking optical network structures for mega data centers.
• To overcome wavelength constraints in traditional Clos networks.

Main Methods:

• Developed two symmetric network structures: ring-MEMS-ring (RMR) and MEMS-ring-MEMS (MRM).
• Utilized classical Clos theory with new strategies for wavelength constraints.
• Verified nonblocking conditions and developed routing algorithms.

Main Results:

• Both RMR and MRM networks achieve high scalability and nonblocking properties.
• Structures are more scalable than folded-Clos networks for future mega DCs (51200 racks).
• MRM network is more cost-effective, avoiding tunable lasers for nonblocking routing.

Conclusions:

• RMR and MRM networks provide scalable, nonblocking optical interconnects for mega data centers.
• The MRM network presents a cost-effective solution compared to RMR.
• These designs address the limitations of current optical network approaches for large-scale DCs.