Most of the present optical interconnect networks within the high performance computers require either the buffering and opto-electonic conversion of the data packets or the pre-assigning of the optical path from the source to destination, which to a certain extent influence the performance metrics such as latency and throughput. Aiming at the limitation mentioned above, a hybrid optical-electrical interconnection for high performance computer system named Bufferless Optical
Interconnection Network (BOIN) is brought forward together with the link control protocol and deadlock/livelock free routing algorithms. The upper bound of the data transmission latency within BOIN is also given. Experimental simulation is based on the comparison of BOIN and the other two similar networks.The results show that BOIN has advantages over the other two that it can deliver high throughput at low latency, which can well satisfy the need for high performance computing systems.I.
As a measurement system that can realize target detection and optical imaging, the accuracy of three-dimensional laser radar is a main performance index, which makes calibration an extremely important work. Traditional calibration methods have many disadvantages, such as harsh environment requirements, complex and tedious calibration processes, and inaccurate calibration results. To solve these problems, we propose a calibration method so that the relative position of the cooperative target and the detection sensor is fixed. The principle of space-time transform is used to simulate distance, and the synchronous control of distance is realized by controlling the delay module. In addition, a simple and practical calibration device is designed. In the actual measurement, the average absolute error is 0.0019 m, and the relative error is 0.0678% in the range of 0.5–25 m. The experimental results show that this method is stable and accurate, and it can calibrate the plane array laser radar quickly and accurately.
In the high performance computer systems, optical interconnections are being used in recent years for improving the performance. With the increase of the number of nodes in the system, as well as the increasing demand for high bandwidth and low latency, a few error nodes would result in the failures of
whole interconnection system. So it is necessary for the optical interconnection to have the fault tolerance capability. A fault tolerant bufferless optical interconnection network named FT-BOIN is brought forward and the corresponding routing algorithms are brought forward. In the FT-BOIN, the intermediate nodes need neither to perform O-E/E-O conversion nor to bufferpackets. This characteristic greatly improves the performance of the optical network. The simulation shows that FT-BOIN has outstanding fault tolerance performance, and can route packets in the network with nodes failure.
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