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“K16304” — 2012/11/19 — 9:15
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7.3 Implementation of SCTP in INET
175
the appropriate SSN is found, it is stored in the delivery queue, and an SCTP-DATA-
ARRIVED-NOTIFICATION is sent to the upper layer, that in turn asks to deliver the
data.
The SACK summarizes the results of the TSN analysis and sends the actual Cu-
mulative TSN Ack and the information about the gap reports and possible duplicate
TSNs back to the data sender. In addition, the size of the updated Advertised Receiver
Window (arwnd) is given (see Section 7.3.2).
Congestion Control
The Congestion Control that SCTP uses is in most parts derived from TCP. Yet some
important differences are due to special SCTP features.
As SCTP allows a host to be multihomed, the congestion control mechanism ...