Sub-Microsecond Network Synchronization for Distributed Wireless PHY Protocols
Sub-Microsecond Network Synchronization for Distributed Wireless PHY Protocols
复制标题
DOI：
10.1145/3131348.3131349
复制
发表时间：
2017-10
期刊：
影响因子：
--
通讯作者：
D. Nguyen;Anton Paatelma;H. Saarnisaari;Nagarajan Kandasamy;K. Dandekar
中科院分区：
文献类型：
--
作者：
D. Nguyen;Anton Paatelma;H. Saarnisaari;Nagarajan Kandasamy;K. Dandekar
我们提出了一种针对企业WLAN网络的混合有线-无线时间同步方法，以实现分布式无线PHY协议的未来部署。我们的方法使用IEEE 1588精确时间协议同步以太网回程上的所有网络AP，而所有客户端通过参考广播同步同步到其主AP。我们在WARP软件定义无线电上实现了这种同步原语，并通过涉及四个网络链路的微基准测试进行了评估。结果证明，我们的方法在所有网络节点之间实现了亚微秒级的同步精度，因此可以作为协议开发的有效构建块。
We present a hybrid wired-wireless time synchronization method targeting enterprise WLAN networks to enable future deployments of distributed wireless PHY protocols. Our method synchronizes all network APs on the Ethernet backhaul using the IEEE 1588 Precise Time Protocol, while all clients are synchronized to their home AP via reference broadcast synchronization. We implement this synchronization primitive on WARP software-defined radios and evaluate through a microbenchmark involving four network links. The results verify that our method achieves sub-microsecond synchronization accuracy among all network nodes and therefore serves as an effective building block for protocol development.