... | ... | @@ -304,12 +304,12 @@ The enhancements to current IEEE 802.1AS include |
|
|
- main network characteristics: ~2000 end stations, links of
|
|
|
max 10km, max network span: 10km
|
|
|
- traffic characteristics: "control data" size (payload):
|
|
|
500-5000 bytes (in
|
|
|
[FEC](https://www.ohwr.org/project/wr-cores/wikis/FEC)
|
|
|
scheme: encoded into 4 or 6 frames of size 300-1500 bytes
|
|
|
and sent in burst,
|
|
|
[FEC](https://www.ohwr.org/project/white-rabbit/uploads/ff98688542afbe36e9f11877ba4c5f1a/ICALEPCS2011_poster.pdf)),
|
|
|
~8 "control streams" (defined within separate VLANs, see
|
|
|
500-5000 bytes (in FEC scheme
|
|
|
"\[1\]":https://www.ohwr.org/project/white-rabbit/uploads/ff98688542afbe36e9f11877ba4c5f1a/ICALEPCS2011_poster.pdf
|
|
|
"\[2\]":https://www.ohwr.org/project/wr-cores/wikis/FEC :
|
|
|
encoded into 4 or 6 frames of size 300-1500 bytes and sent
|
|
|
in burst), ~8 "control streams" (defined within separate
|
|
|
VLANs, see
|
|
|
[page 7](https://www.ohwr.org/project/white-rabbit/uploads/1244844e3c3cf850fad84e575f3b3f61/wrCernControlAndTiming.v1.1.pdf))
|
|
|
sent every 1000us, critical stream is one-to-many, "normal
|
|
|
data" size (payload): ~1500 bytes
|
... | ... | @@ -319,13 +319,12 @@ The enhancements to current IEEE 802.1AS include |
|
|
- main network characteristics: ~2000 end stations, links of
|
|
|
max 2km, max network span: 2km
|
|
|
- traffic characteristics: "control data" size (payload):
|
|
|
200-500 bytes (in
|
|
|
[FEC](https://www.ohwr.org/project/wr-cores/wikis/FEC)
|
|
|
scheme: encoded into 4 frames of size 150-300 bytes and sent
|
|
|
in burst,
|
|
|
[FEC](https://www.ohwr.org/project/white-rabbit/uploads/ff98688542afbe36e9f11877ba4c5f1a/ICALEPCS2011_poster.pdf)),
|
|
|
sent every 100us, critical stream is one-to-many, "normal
|
|
|
data" size (payload): ~1500 bytes
|
|
|
200-500 bytes (in FEC scheme
|
|
|
"\[1\]":https://www.ohwr.org/project/white-rabbit/uploads/ff98688542afbe36e9f11877ba4c5f1a/ICALEPCS2011_poster.pdf
|
|
|
"\[2\]":https://www.ohwr.org/project/wr-cores/wikis/FEC :
|
|
|
encoded into 4 frames of size 150-300 bytes and sent in
|
|
|
burst), sent every 100us, critical stream is one-to-many,
|
|
|
"normal data" size (payload): ~1500 bytes
|
|
|
- Synchronization:
|
|
|
- accuracy: sub-nanosecond in the entire network
|
|
|
- precision: order of picoseconds in the entire network
|
... | ... | |