Abstract

Optical network-on-chip (ONoC) is a promising technology for future on-chip many-core communications. ONoC can achieve high bandwidth density and low communication latency under low network cost, which leads to an energy-efficient network. Time-division multiplexing (TDM)-based ONoC aims to solve the congestion problem faced by many optical circuit switching (OCS)-based mesh ONoCs. But TDM-based ONoC still suffers from high network polling time, which causes high average network latency, especially under low network load. In this paper, we propose a novel TDM ONoC using torus topology and direction-based wavelength assignment, named TTWA. TTWA ONoC combines TDM communication strategy and torus network topology to solve the congestion problem under the heavy network load faced by OCS-based ONoCs. With the utilization of direction-based wavelength assignment and torus topology, we further propose a high-efficiency communication strategy to improve the adjacent inter-cluster parallel communications and decrease the total TDM slot number, which contributes to a smaller network polling time and lower average network latency. A novel optical router is simultaneously designed to meet the communication strategy in TTWA. The analyses and simulation results indicate that TTWA ONoC improves the polling time compared with other TDM-based ONoCs and achieves better network performance compared with the equivalent OCS-based ONoCs under various synthetic traffic patterns and realistic scientific applications. After the calculation, TTWA ONoC reduces the network insertion loss of OCS-based mesh ONoC 46.92% and that of OCS-based torus ONoC 31.75% and reduces the required laser power of OCS-based mesh ONoC 62.90% and that of OCS-based torus ONoC 40.66% under the worst-case situation.

© 2017 Optical Society of America

Time-Division-Multiplexing–Wavelength-Division-Multiplexing-Based Architecture for ONoC

Huaxi Gu, Zhengyu Wang, Bowen Zhang, Yintang Yang, and Kun Wang
J. Opt. Commun. Netw. 9(5) 351-363 (2017)

Efficient O-type mapping and routing of large-scale neural networks to torus-based ONoCs

Qiuyan Yao, Daqing Meng, Hui Yang, Nan Feng, and Jie Zhang
J. Opt. Commun. Netw. 16(9) 918-928 (2024)

P-Torus: wavelength-based switching in packet granularity for intra-data-center networks

Charidimos Chaintoutis, Adonis Bogris, and Dimitris Syvridis
J. Opt. Commun. Netw. 11(9) 491-500 (2019)

Making path selection faster: a routing algorithm for ONoC

Lijing Zhu, Huaxi Gu, Yintang Yang, and Yawen Chen
Opt. Express 29(7) 10221-10235 (2021)

Network Condition-Aware Communication Mechanism for Circuit-Switched Optical Networks-on-Chips

Wei Tan, Huaxi Gu, Yintang Yang, Meaad Fadhel, and Bowen Zhang
J. Opt. Commun. Netw. 8(10) 813-821 (2016)