... | @@ -299,13 +299,15 @@ The enhancements to current IEEE 802.1AS include |
... | @@ -299,13 +299,15 @@ The enhancements to current IEEE 802.1AS include |
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- CERN
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- CERN
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- maximum latency: below 1000us over ~5 bridge hops @ 1Gbps
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- maximum latency: below 1000us over ~5 bridge hops @ 1Gbps
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([page 10](https://www.ohwr.org/project/white-rabbit/uploads/1244844e3c3cf850fad84e575f3b3f61/wrCernControlAndTiming.v1.1.pdf))
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([page 10](https://www.ohwr.org/project/white-rabbit/uploads/1244844e3c3cf850fad84e575f3b3f61/wrCernControlAndTiming.v1.1.pdf))
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- guaranteed latency over tree-like topology
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- guaranteed latency over tree-like (meshed) topology
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([page 19](https://www.ohwr.org/project/white-rabbit/uploads/1244844e3c3cf850fad84e575f3b3f61/wrCernControlAndTiming.v1.1.pdf))
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([page 19](https://www.ohwr.org/project/white-rabbit/uploads/1244844e3c3cf850fad84e575f3b3f61/wrCernControlAndTiming.v1.1.pdf))
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- main network characteristics: ~2000 end stations, links of
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- main network characteristics: ~2000 end stations, links of
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max 10km, max network span: 10km
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max 10km, max network span: 10km
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- traffic characteristics: "control data" size (payload):
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- traffic characteristics: "control data" size (payload):
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500-5000 bytes (encoded into several frames of size 300-1500
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500-5000 bytes (in
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bytes and sent in burst,
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[FEC](https://www.ohwr.org/project/wr-cores/wikis/FEC)
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scheme: encoded into 4 or 6 frames of size 300-1500 bytes
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and sent in burst,
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[FEC](https://www.ohwr.org/project/white-rabbit/uploads/ff98688542afbe36e9f11877ba4c5f1a/ICALEPCS2011_poster.pdf)),
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[FEC](https://www.ohwr.org/project/white-rabbit/uploads/ff98688542afbe36e9f11877ba4c5f1a/ICALEPCS2011_poster.pdf)),
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~8 "control streams" (defined within separate VLANs, see
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~8 "control streams" (defined within separate VLANs, see
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[page 7](https://www.ohwr.org/project/white-rabbit/uploads/1244844e3c3cf850fad84e575f3b3f61/wrCernControlAndTiming.v1.1.pdf))
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[page 7](https://www.ohwr.org/project/white-rabbit/uploads/1244844e3c3cf850fad84e575f3b3f61/wrCernControlAndTiming.v1.1.pdf))
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... | @@ -313,12 +315,14 @@ The enhancements to current IEEE 802.1AS include |
... | @@ -313,12 +315,14 @@ The enhancements to current IEEE 802.1AS include |
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data" size (payload): ~1500 bytes
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data" size (payload): ~1500 bytes
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- GSI (not necessarily up-to-date)
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- GSI (not necessarily up-to-date)
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- maximum latency: 100us over ~4 bridge hops @ 1Gbps
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- maximum latency: 100us over ~4 bridge hops @ 1Gbps
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- guaranteed latency over tree-like topology
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- guaranteed latency over tree-like (meshed) topology
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- main network characteristics: ~2000 end stations, links of
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- main network characteristics: ~2000 end stations, links of
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max 2km, max network span: 2km
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max 2km, max network span: 2km
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- traffic characteristics: "control data" size (payload):
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- traffic characteristics: "control data" size (payload):
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200-500 bytes (encoded into 4 frames of size 150-300 bytes
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200-500 bytes (in
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and sent in burst,
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[FEC](https://www.ohwr.org/project/wr-cores/wikis/FEC)
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scheme: encoded into 4 frames of size 150-300 bytes and sent
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in burst,
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[FEC](https://www.ohwr.org/project/white-rabbit/uploads/ff98688542afbe36e9f11877ba4c5f1a/ICALEPCS2011_poster.pdf)),
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[FEC](https://www.ohwr.org/project/white-rabbit/uploads/ff98688542afbe36e9f11877ba4c5f1a/ICALEPCS2011_poster.pdf)),
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sent every 100us, critical stream is one-to-many, "normal
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sent every 100us, critical stream is one-to-many, "normal
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data" size (payload): ~1500 bytes
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data" size (payload): ~1500 bytes
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