Exploration Of Topology And Communication Mechanism For Hybrid Optical-Electronic Networks-on-Chip

Traditional electronic NoC cannot meet the high-bandwidth,low-latency and low-power requirements in long-distance and high-traffic transmission on chip.The technology about optical NoC has advantages in high communication bandwidth,low power consumption and low delay,which can effectively solve the bottleneck of the performance in electronic NoC.However,when the communication distance is close and the size of data is small,the advantages in optical layer will not make up the dissipation caused by extra electrical control layer.Therefore,considering the advantages of optical and electrical interconnection,it is a great significance to study the hybrid optical-electronic NoC for integrated circuit design.On the basis of researching the network topology of electronic and optical,this paper proposes an hybrid optical-electronic NoC HOEN based on Mesh.HOEN provides fast and low-cost optical link for long-distance and high-traffic message,while preserving electrical path for small traffic and local message.In order to reduce the consumption of hardware and power,a mathematic layout model of the photoelectric interface is established and HOEN is optimized by integer linear programming algorithm.After the optimization of HOEN,this paper proposes a differential power dissipation routing algorithm.By comparing the power consumption of the optical link and the electrical link,the smaller power consumption path will be selected to transmit messages,which effectively improve the NoC performance of power and delay;Also in order to improve network throughput and reduce system congestion,this paper analyzes the impact of large flow data on network performance,designs a routing algorithm based on large flow prediction,and constructs a fast and low-cost optical path for it.Shunt strategy is used to reduce the network delay.Combining the optical network simulators DSENT and Phoenixm,and taking into account a number of related literatures,this paper extracts the parameters of optical devices.The simulation of the HOEN is performed by Noxim embedded the optical device parameters into.Take the 8 × 8 size of HOEN as example,compared with ENoC and ONoC,when the network load is close to saturation,combined with the proposed power dissipation routing algorithm,the power consumption of HOEN is reduced by 54.4% and 10.2%,and the network delay is reduced by 39.6 % And 10.9%.