... | @@ -157,24 +157,17 @@ Improvements to AVB Gen 1: |
... | @@ -157,24 +157,17 @@ Improvements to AVB Gen 1: |
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- \[re-\]reservation of stream (802.1Qat)
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- \[re-\]reservation of stream (802.1Qat)
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- Ultra-low latency for critical traffic
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- Ultra-low latency for critical traffic
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- Toyota
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- Toyota
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([see](http://www.ieee802.org/1/files/public/docs2011/new-avb-nakamura-automotive-backbone-requirements-0907-v02.pdf))
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([page 2](http://www.ieee802.org/1/files/public/docs2011/new-avb-nakamura-automotive-backbone-requirements-0907-v02.pdf))
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- maximum latency: 100us over 5 AVB bridge hops @ 100Mb or
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- maximum latency: 100us over 5 AVB bridge hops @ 100Mb or
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1Gbps
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1Gbps
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([page 2](http://www.ieee802.org/1/files/public/docs2011/new-avb-nakamura-automotive-backbone-requirements-0907-v02.pdf))
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- guaranteed and topology independent latency
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- guaranteed and topology independent latency
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- main network characteristics: max 32 devices
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- main network characteristics: max 32 devices
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(switches+nodes), links of 24m, max network span: 30m
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(switches+nodes), links of 24m, max network span: 30m
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(details:
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[page 2](http://www.ieee802.org/1/files/public/docs2011/new-avb-nakamura-automotive-backbone-requirements-0907-v02.pdf))
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- traffic characteristics: "control data" size (payload): ~256
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- traffic characteristics: "control data" size (payload): ~256
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bytes, max of 32 "control streams" sent every 500us, "normal
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bytes, max of 32 "control streams" sent every 500us, "normal
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data" size (payload): ~1500 bytes (details:
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data" size (payload): ~1500 bytes
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[page 2](http://www.ieee802.org/1/files/public/docs2011/new-avb-nakamura-automotive-backbone-requirements-0907-v02.pdf))
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- Siemens
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- Siemens
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([see](http://www.ieee802.org/1/files/public/docs2011/new-avb-nakamura-automotive-backbone-requirements-0907-v02.pdf))
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([page 14](http://www.ieee802.org/1/files/public/docs2011/new-avb-nakamura-automotive-backbone-requirements-0907-v02.pdf))
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- max latency / hop \< 3us
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- max latency / hop \< 3us
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- topology (quite) independent (Daisy Chain / Comb / Ring)
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- topology (quite) independent (Daisy Chain / Comb / Ring)
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- main network characteristics: max 512 devices, max hps: 64
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- main network characteristics: max 512 devices, max hps: 64
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