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arXiv 2005.12517cs.NInlin.AO
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基于无线干涉精密时间同步的信息传递

Information transfer based on precision time synchronization via wireless interferometry

Daijiro Koyama, Yunzhuo Wang, Nobuyasu Shiga, Satoshi Yasuda, Nicolas Chauvet, Makoto Naruse

摘要:

近年来,数据中心和车载网络等信息和通信技术对高带宽和低延迟信息传输的需求不断增长,增加了光通信网络的重要性。然而,复杂的仲裁方案可能会在数据传输中施加显著的开销,这可能会抑制光互连潜力的充分利用。在这里,我们提出了一个仲裁协议的基础上,通过无线双向干涉(Wi-Wi)的精确时间同步,并数值验证其效率,包括能够施加一个严格的上限的数据传输的延迟。与传统的载波侦听多路访问/冲突检测(CSMA/CD)的方法相比,在数据传输的显着改善,特别是在高流量的情况下,观察。此外,我们对两个电连接节点之间基于Wi-Wi的数据传输进行了原理验证实验,并确认偏斜小于300 ns,并且随着时间的推移保持稳定。相反,非基于WiWi的数据传输表现出巨大且不稳定的偏斜。这些结果表明,精确的时间同步是一个有前途的资源,以显着减少通信开销,并确保未来的网络和实时应用的低延迟。

英文摘要:

The growing demand of high-bandwidth and low-latency information transfer in information and communication technologies such as data centres and in-vehicle networks has increased the importance of optical communication networks in recent years. However, complicated arbitration schemes can impose significant overheads in data transfer, which may inhibit the full exploitation of the potential of optical interconnects. Herein, we propose an arbitration protocol based on precision time synchronization via wireless two-way interferometry (Wi-Wi), and numerically validate its efficiency including the ability to impose a strict upper bound on the latency of data transfer. Compared with the conventional carrier sense multiple access/collision detection (CSMA/CD)-based approach, a significant improvement in the data transfer was observed especially in the cases with high traffic flow rate. Furthermore, we conducted a proof-of-principle experiment for Wi-Wi-based data transfer between two electrically connected nodes and confirmed that the skew was less than 300 ns and remained stable over time. Conversely, non-WiWi-based data transfer exhibited huge and unstable skew. These results indicate that precision time synchronization is a promising resource to significantly reduce the communication overheads and ensure low latency for future networks and real-time applications.

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