... | ... | @@ -15,22 +15,27 @@ are described briefly. Then the requirements, plans and features of AVB |
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## **AVB *Gen1***
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The Audio Video Bridging (*Gen1*) technology defines mechanisms (IEEE
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802.1BA) which allow to recognizes all the AVB-compatible devices in the
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network. Basically, AVB works only within a domain of directly connected
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AVB-compatible network devices (i.e. bridges or endpoints). These
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devices support precise synchronization (IEEE 802.1AS) and enable
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reservation of their resources (IEEE 802.1Qat) for a data stream. This
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way, and using special traffic shaping (IEEE 802.1Qav), deterministic
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and low latency communication (stream) between AVB-compatible endpoints
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though AVB-compatible network is
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The Audio Video Bridging (*Gen1*) technology defines mechanisms (**IEEE
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802.1BA**) which allow to recognizes all the AVB-compatible devices in
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the network. Basically, AVB works only within a domain of directly
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connected AVB-compatible network devices (i.e. bridges or endpoints).
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These devices support precise synchronization (**IEEE 802.1AS**) and
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enable reservation of their resources (**IEEE 802.1Qat**) for a data
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stream. This way, and using special traffic shaping (**IEEE 802.1Qav**),
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deterministic and low latency communication (stream) between
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AVB-compatible endpoints though AVB-compatible network is
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achieved.
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### IEEE 802.1AS: Timing and Synchronization for Time-Sensitive Applications (gPTP):
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- a
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- b
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- c
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- very tightly-constrained subset of PTP (which, except for Ethernet,
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supports wireless and Coordinated Shared Networks)
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- it is based on, and includes a profile of, PTP (i.e. IEEE 1588-2008)
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-
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- time synchronization requirement: -/+500ns with reference to
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network's grandmaster
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- references:
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[1](http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=4659212&tag=1)
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### IEEE 802.1Qat: Stream Reservation Protocol (SRP),
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