White rabbit: Sub-nanosecond timing distribution over ethernet
White rabbit: Sub-nanosecond timing distribution over ethernet
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DOI：
10.1109/ispcs.2009.5340196
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发表时间：
2009-11
期刊：
影响因子：
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通讯作者：
P. Moreira;J. Serrano;T. Wlostowski;P. Loschmidt;G. Gaderer
中科院分区：
文献类型：
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作者：
P. Moreira;J. Serrano;T. Wlostowski;P. Loschmidt;G. Gaderer
白色兔子（WR）是一个模糊项目的项目名称，该项目使用以太网作为确定性（同步）数据传输和定时网络。所提出的设计目标是一个通用的，现场总线一样的传输系统，它提供了确定性的数据和定时约1000个定时站。相对于传统系统的主要优点是高度精确的定时（亚纳秒范围），而不限制流量调度和高优先级消息的传递时间的上限。此外，WR还自动补偿光纤链路中的传输延迟，长度在10公里范围内。它利用同步以太网和IEEE 1588的最新发展，能够将准确的定时信息分发到节点，节省大量带宽。
White Rabbit (WR) is the project name for a ambiguous project that uses Ethernet as both, deterministic (synchronous) data transfer and timing network. The presented design aims for a general purpose, fieldbus like transmission system, which provides deterministic data and timing to approximately 1000 timing stations. The main advantage over conventional systems is the highly accurate timing (sub-nanosecond range) without restrictions on the traffic schedule and an upper bound for the delivery time of high priority messages. In addition, WR also automatically compensates for transmission delays in the fibre links, which are in the range of 10 km length. It takes advantage of the latest developments on synchronous Ethernet and IEEE 1588 to enable the distribution of accurate timing information to the nodes saving noticeable amounts of bandwidth.