pxf4336 Infineon Technologies Corporation, pxf4336 Datasheet - Page 102
pxf4336
Manufacturer Part Number
pxf4336
Description
Abm Premium Atm Buf Fer Manager
Manufacturer
Infineon Technologies Corporation
Datasheet
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3.5.1.3
3.5.1.3.1 ACR Calculation
The standardized source behavior defines several conditions under which the ACR must
be recalculated.
BRM Cell Receive
The BRM cells received by the ABR source carry the following congestion related
information:
• CI
• NI
• ER
Based on this information, the source performs the ACR calculation according to the
algorithm shown in
Figure 3-38 ACR calculation at BRM Cell Receive
FRM Cell Send
Before sending an FRM cell, the ABR source performs the algorithm in
Data Sheet
Source Behavior Overview
Congestion Indication Bit is set in highly congested nodes
No Increase Bit is set in moderately congested nodes
Explicit Rate is calculated by nodes
ACR = ACR – ACR * RDF
ACR = min(ACR, ER)
ACR = max(ACR, MCR)
ACR = min(ACR, PCR)
BRM cell received
Figure
CI = 1?
Y
End
3-38:
N
NI = 1?
Y
102
ACR = ACR + PCR * RIF
N
Functional Description
PXF 4336 V1.1
Figure
2001-12-17
ABM-P
3-39:
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