IEEE 802.1Qbv-2015 pdf free.IEEE Standard for  Local and metropolitan area networks-Bridges and Bridged Networks Amendment 25: Enhancements for Scheduled Traffic.
Insert the following definitions in alphabetic order, renumbering as appropriate, and renumber the subsequent term.’. accordingly:
3.1 gate-close esent: An event that occurs when the transmission gate associated with a queue transitions from the Open state to the Closed state, disconnecting the transmission selection function of the forwarding process from the queue and prcvcnting it from sdccting frames from that queue.
3.2 gate-open event: An event that occurs when the transmission gate associated with a queue transitions from the Closed state to the Open state, connecting the transmission selection function of the forwarding process to a queue and allowing it to select frames from that queue.
3.3 gatlng cycle: The period of time over which the sequence of operations in a gate control list repeats.
3.4 transmission gate: A gale that connects or disconnects the transmission selection function of the forwarding process from the queue. allowing or preventing it from selecting frames from that queue. The gate has two states, Open and Closed.
A gale control list associated with each Port contains an ordered list of gate operations. Each gate operation changes the transmission gate state for the gate associated with each of the Port’s traffic class queues. In an implementation that does not support enhancements for scheduled traffic, all gates are assumed to be permanently in the opeit state. Table 8-6 identifies the gate operation types. their parameters. and the actions that result from their execution. The state machines that control the execution of the gate control list, along with their variables and procedures, are specified in 8.6.9.
In addition to the other checks carried out by the transmission selection algorithm, a frame on a traffic class queue is not available for transmission [as required for tests (a) and (h) in 8.6.8] if the transmission gate is in the closed state or if there is insufficient lime available to transmit the entirety of that frame before the next gate-close event (3.1) associated with that queue. A per-traffic class counter. TransmissionOvcrrun (12.29. I .1 .2), is incremented if the implementation detects that a frame from a given queue is still being transrntted by the MAC when the gate-close event for that queue occurs.IEEE 802.1Qbv pdf free download.