Research And Simulation Of Thermal Stability Control Method For Hybrid Optical-Electronic Networks-on-Chip

Compared with the traditional electrical interconnection NoC,the hybrid optical-electronic NoC fully combines the advantages of optical interconnection network and electrical interconnection network that has the advantages of high bandwidth,low delay and low power consumption,in long-distance communication and close distance.Communication can achieve optimal performance.However,since the optical device in the optical network has the strong sensitivity to temperature,especially the thermal stability of the microring resonator is poor,the resonant wavelength is easily shifted due to temperature changes,which seriously affects the network communication performance.Therefore,it is of great significance to study the thermal stability control method of the hybrid optical-electronic NoC.Based on the analysis of the characteristics of electrical interconnection and optical interconnection technology,hybrid optical-electronic NoC composed of a Mesh-structured electrical network and a wavelength division multiplexing optical network that is selected as the main research object.In order to improve the thermal stability of the network on the hybrid optical-electronic NoC.Firstly,for the problem of heat distribution imbalance caused by task assignment during task execution,an offline task mapping method based on micro-ring perception is proposed.The task is balanced according to the power consumption difference of the task.The mapping to each processor core in the network achieves a balanced temperature distribution and reduces the temperature around the microring.Secondly,due to the memory read and write power consumption and the power consumption of the network itself during the task execution,the temperature distribution of the optical node is also affected.Therefore,an online temperature control strategy based on thermal prediction is designed to determine the current optical node temperature and threshold temperature.Determine whether to implement the temperature control strategy and control the temperature change by dynamically adjusting the operating frequency method to improve the optical node temperature environment.Finally,an adaptive routing algorithm based on microring sensing is proposed to solve the problem of partial optical node failure during the execution of online temperature control strategy.The global communication of the network is realized to avoid communication failure caused by optical node failure.In this paper,the real-application on-chip network simulation software JADE has been modified,and the temperature simulation module and power consumption extraction module have been added to build a network temperature simulation environment for hybrid optical-electronic NoC and achieve thermal stability simulation and verification.In the 8×8 topological scale,the temperature distribution around the optical node tends to be equalized and the peak temperature is reduced by 2K to 3K.With the online temperature control strategy,the average temperature is reduced by approximately 1K to 2K,the average packet delay is reduced by approximately 12%,and the network throughput is increased by approximately 10%.After adopting the adaptive routing algorithm,the throughput of the network is increased by about 11%.