rfc9893v4.txt   rfc9893.txt 
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data when an extension requiring the use of credit window flow data when an extension requiring the use of credit window flow
control is used. Note that Traffic Classification Identifier (TID) control is used. Note that Traffic Classification Identifier (TID)
values and FID values are significant only to the issuing modem. values and FID values are significant only to the issuing modem.
There is no relationship implied by the same TID or FID value being There is no relationship implied by the same TID or FID value being
issued by more than one modem. In addition to the traffic issued by more than one modem. In addition to the traffic
classification information associated with a FID, modems provide an classification information associated with a FID, modems provide an
initial credit window size, as well as the maximum size of the initial credit window size, as well as the maximum size of the
logical queue associated with each credit window. The maximum size logical queue associated with each credit window. The maximum size
is included for informative and potential future uses. is included for informative and potential future uses.
Modems provide an initial credit window size at the time of "Credit Modems provide an initial credit window size at the time of credit
Window Initialization". Such initialization can take place during window initialization. Such initialization can take place during
session initiation or any point thereafter. It can also take place session initiation or any point thereafter. It can also take place
when rate information changes. An increment to a credit window size, when rate information changes. An increment to a credit window size,
specified in a Credit Window Grant Data Item, is provided in a specified in a Credit Window Grant Data Item, is provided in a
Destination Up Message (Section 2.3.2) or Credit Control Message Destination Up Message (Section 2.3.2) or Credit Control Message
(Section 2.2.1). A router provides its view of the credit window, (Section 2.2.1). A router provides its view of the credit window,
which is known as "Status", in Destination Up Response Messages which is known as "Status", in Destination Up Response Messages
(Section 2.3.3) and Credit Control Response Messages (Section 2.2.2). (Section 2.3.3) and Credit Control Response Messages (Section 2.2.2).
Routers can also request credits using the Credit Control Message. Routers can also request credits using the Credit Control Message.
When modems provide credits to a router, they will need to take into When modems provide credits to a router, they will need to take into
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