Superseded
Standard amendment
Historical
IEEE 802.1Qav:2009
IEEE Standard for Local and metropolitan area networks-- Virtual Bridged Local Area Networks Amendment 12: Forwarding and Queuing Enhancements for Time-Sensitive Streams
Summary
Amendment Standard - Superseded.
This amendment to IEEE Std 802.1Q defines enhancements to the forwarding and queueing functions of a VLAN Bridge to support the transmission of time sensitive data streams.
This standard allows bridges to provide performance guarantees for time-sensitive (i.e., bounded latency and latency variation) loss-sensitive real-time audio video (AV) data stream transmission (AV traffic). It specifies priority regeneration and controlled bandwidth queue draining algorithms. Virtual Local Area Network (VLAN) tag encoded priority values are allocated, in aggregate, to segregate frames among queues that support AV traffic and queues that support non-AV traffic, allowing simultaneous support of both AV traffic and other bridged traffic over and between wired and wireless Local Area Networks (LANs). To this end, it:
a) Defines status parameters that allow the boundaries of a Stream Reservation Protocol (SRP—see
Clause 351) domain (6.6.4) to be identified and maintained;
b) Specifies how the priority information in frames received at SRP domain boundary ports is
regenerated.
NOTE 1—The priorities in frames transmitted from outside an SRP domain to a Bridge inside an SRP domain are remapped in order to ensure that traffic that is not associated with a reservation does not disrupt traffic that is associated with a reservation. Hence, traffic entering an SRP domain that uses priority code point values associated with reserved traffic classes will be re-mapped to priority code point values that are not associated with reserved traffic classes.
c) Specifies how priority information is used to determine the traffic classes to be used for time-sensitive streams;
d) Defines a credit-based shaper algorithm to shape traffic in accordance with stream reservations
This amendment to IEEE Std 802.1Q defines enhancements to the forwarding and queueing functions of a VLAN Bridge to support the transmission of time sensitive data streams.
This standard allows bridges to provide performance guarantees for time-sensitive (i.e., bounded latency and latency variation) loss-sensitive real-time audio video (AV) data stream transmission (AV traffic). It specifies priority regeneration and controlled bandwidth queue draining algorithms. Virtual Local Area Network (VLAN) tag encoded priority values are allocated, in aggregate, to segregate frames among queues that support AV traffic and queues that support non-AV traffic, allowing simultaneous support of both AV traffic and other bridged traffic over and between wired and wireless Local Area Networks (LANs). To this end, it:
a) Defines status parameters that allow the boundaries of a Stream Reservation Protocol (SRP—see
Clause 351) domain (6.6.4) to be identified and maintained;
b) Specifies how the priority information in frames received at SRP domain boundary ports is
regenerated.
NOTE 1—The priorities in frames transmitted from outside an SRP domain to a Bridge inside an SRP domain are remapped in order to ensure that traffic that is not associated with a reservation does not disrupt traffic that is associated with a reservation. Hence, traffic entering an SRP domain that uses priority code point values associated with reserved traffic classes will be re-mapped to priority code point values that are not associated with reserved traffic classes.
c) Specifies how priority information is used to determine the traffic classes to be used for time-sensitive streams;
d) Defines a credit-based shaper algorithm to shape traffic in accordance with stream reservations
Notes
Superseded
Technical characteristics
| Publisher | Institute of Electrical and Electronics Engineers (IEEE) |
| Publication Date | 01/05/2010 |
| Cancellation Date | 01/01/2011 |
| Edition | |
| Page Count | 72 |
| EAN | --- |
| ISBN | --- |
| Weight (in grams) | --- |
| Brochures |
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Amendments modifies
19/05/2006
Superseded
Historical
Previous versions
22/12/2022
Active
Most Recent
22/07/2022
Superseded
Historical
IEEE 802.1Q:2018
IEEE Standard for Local and Metropolitan Area Networks—Bridges and Bridged Networks
06/07/2018
Superseded
Historical
19/12/2014
Superseded
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19/05/2006
Superseded
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07/05/2003
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08/03/1999
Superseded
, Confirmed
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