A Self-Propagating Wakeup Mechanism for Point-to-Point Networks with Partial Network Support

被引:0
|
作者
Seyler, Jan R. [1 ]
Streichert, Thilo [1 ]
Warkentin, Juri [1 ]
Spaegele, Matthias [1 ]
Glass, Michael [2 ]
Teich, Juergen [2 ]
机构
[1] Daimler AG, Mercedes Benz Cars Dev, EE Architectures & Stand, Stuttgart, Germany
[2] Univ Erlangen Nurnberg, Dept Comp Sci 12, Erlangen, Germany
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中图分类号
TP [自动化技术、计算机技术];
学科分类号
0812 ;
摘要
As a result of the increased demand for bandwidth, current automotive networks are getting more heterogeneous. New technologies like Ethernet as a packetswitched point-to-point network are introduced. Nevertheless, the requirements on stand-by power consumption and short activation times are still the same as for existing field buses. Ethernet does not provide wakeup mechanisms that are sufficient for automotive systems. As a remedy, this paper introduces a novel physical-layer mechanism called Low Frequency Wakeup that is largely independent of the communication technology and topology used. It provides parallel and remote wakeup for all nodes even in a point-topoint network as well as full support of partial networking. The overall wakeup detection time is smaller than 10 ms and every node can actively feed a wakeup signal asynchronously to all other nodes. In terms of latency, it is shown that Low Frequency Wakeup reaches a reduction of more than 30 % for a three-hop network and more than 50 % for a five-hop network in comparison to the current state-of-the-art technology for automotive point-to-point networks.
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页数:6
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