Abstract

Modeling and performance analysis of a data center network (DCN) combining optical packet switching (OPS) and agile optical circuit switching (OCS) in a unified platform are presented. Hybrid optoelectronic packet routers which combine optical switching fabric and electronic buffers are used, supporting 100 Gbit/s ($25\mathrm{Gbit}/\mathrm{s}\times 4$ wavelengths) optical packets. OCS transmission is implemented by a novel “express path,” (ExP) an instant wavelength path on demand, which enables certain flows following the ExP with no packet contention, whereas ordinary OPS packets are switched with a deflection routing algorithm and buffering for contention resolution. This architecture can support OCS for large and reliability-sensitive data transferring and OPS for latency-sensitive applications. The performance of the network is investigated via numerical simulations of top-of-rack switch (ToR)-to-ToR traffic in an $N$-dimensional (up to 4096 node) torus topology. We have made the following observations: 1) torus topology results in high throughput and can be scaled out by increasing the dimension; 2) contention resolution between OPS and agile OCS is needed and our proposed strategies enhance the overall performance; and 3) in a lightly to moderately loaded case of OPS traffic, more than 100 ExPs can be supported simultaneously with acceptable affect on OPS.

© 2015 Optical Society of America

Torus Data Center Network With Smart Flow Control Enabled by Hybrid Optoelectronic Routers [Invited]

Ryo Takahashi, Toru Segawa, Salah Ibrahim, Tatsushi Nakahara, Hiroshi Ishikawa, Atsushi Hiramatsu, Yue-Cai Huang, and Ken-ichi Kitayama
J. Opt. Commun. Netw. 7(12) B141-B152 (2015)

Optimal Virtual Slice Composition Toward Multi-Tenancy Over Hybrid OCS/OPS Data Center Networks

Albert Pagès, Miguel Pérez Sanchís, Shuping Peng, Jordi Perelló, Dimitra Simeonidou, and Salvatore Spadaro
J. Opt. Commun. Netw. 7(10) 974-986 (2015)

Scalable and low server-to-server latency data center network architecture based on optical packet inter-rack and intra-rack switching

Georgios Drainakis, Peristera Baziana, and Adonis Bogris
J. Opt. Commun. Netw. 15(11) 804-819 (2023)

OPSquare: A Flat DCN Architecture Based on Flow-Controlled Optical Packet Switches

Fulong Yan, Wang Miao, Oded Raz, and Nicola Calabretta
J. Opt. Commun. Netw. 9(4) 291-303 (2017)

SDN-Enabled OPS With QoS Guarantee for Reconfigurable Virtual Data Center Networks

Wang Miao, Fernando Agraz, Shuping Peng, Salvatore Spadaro, Giacomo Bernini, Jordi Perelló, Georgios Zervas, Reza Nejabati, Nicola Ciulli, Dimitra Simeonidou, Harm Dorren, and Nicola Calabretta
J. Opt. Commun. Netw. 7(7) 634-643 (2015)