论文标题
Crocs：WiFi和Zigbee的跨技术时钟同步
Crocs: Cross-Technology Clock Synchronization for WiFi and ZigBee
论文作者
论文摘要
时钟同步是嵌入式无线系统和网络中的关键功能。如今，在物联网系统中，此问题同样重要，而且更具挑战性，该问题通常包括遵循不同无线标准的异质无线设备。该问题的常规解决方案采用基于网关的间接同步，其精度较低。本文首次研究跨技术时钟同步的问题。我们称为Crocs的建议通过直接跨技术通信同步WiFi和Zigbee设备。鳄鱼将同步信号从时间戳的传输中解散。通过将基于Barker代码的信标合并以进行时间戳和跨技术的传输，Crocs可以在WiFi和Zigbee设备之间实现稳健和准确的同步，同步误差低于1毫秒。我们进一步尝试在CROC中实施不同的跨技术通信方法，并就可实现的准确性和预期开销提供见解发现。
Clock synchronization is a key function in embedded wireless systems and networks. This issue is equally important and more challenging in IoT systems nowadays, which often include heterogeneous wireless devices that follow different wireless standards. Conventional solutions to this problem employ gateway-based indirect synchronization, which suffers low accuracy. This paper for the first time studies the problem of cross-technology clock synchronization. Our proposal called Crocs synchronizes WiFi and ZigBee devices by direct cross-technology communication. Crocs decouples the synchronization signal from the transmission of a timestamp. By incorporating a barker-code based beacon for time alignment and cross-technology transmission of timestamps, Crocs achieves robust and accurate synchronization among WiFi and ZigBee devices, with the synchronization error lower than 1 millisecond. We further make attempts to implement different cross-technology communication methods in Crocs and provide insight findings with regard to the achievable accuracy and expected overhead.
