PXF4333 Datasheet, PDF (73/361 Pages) Infineon Technologies AG – ABM 3G ATM Buf fer Manager

ABM-3G
PXF 4333 V1.1
Functional Description
IF
THEN
ELSE
LastCellOfPacket AND UserToUserCell
IF
[(ExceedEpd OR ExceedMaxQueue) AND (GFRen = FALSE)] OR
(ExceedEpd AND ExceedMaxQueue) OR
ExceedEpdCLP1
THEN DiscardPacket = TRUE
ELSE DiscardPacket = FALSE
Do nothing
IF
THEN
ELSE
EPDen AND UserToUserCell AND DiscardPacket
CellAcceptedByEPD = FALSE
CellAcceptedByEPD = TRUE
LastCellOfPacket = UserToUserCell AND EndOfPacket
3.4.1.7.3 PPD Algorithm
If the PPD algorithm is applied, the last cell of a corrupted packet should be accepted.
IF
THEN
IF
THEN
ELSE
PPDen AND UserToUserCell AND EndOfPacket
DiscardRestOfPacket = FALSE
PPDen AND UserToUserCell AND DiscardRestOfPacket
CellAcceptedByPPD = FALSE
CellAcceptedByPPD = TRUE
3.4.1.7.4 Hysteresis Algorithm
For any threshold TH:Delta(TH) = TH - TH/2**[DH + 1] with DH in 1..7
FillBelowHyst =
(ExceedMinBG = FALSE) OR (DH = 0) OR [
(BufferOccNg < Delta(BufMaxNg)) AND
((SBOccNg < Delta(SBMax)) OR (QID = 0)) AND
(TrafClassOccNg < Delta(TrafClassMax)) AND
(QueueLength >= Delta(QueueMax)) ]
IF
THEN
UserToUserCell AND (PPDen = FALSE) AND FillBelowHyst
DiscardRestOfPacket = FALSE
IF
THEN
ELSE
UserToUserCell AND (PPDen = FALSE) AND DiscardRestOfPacket
CellAcceptedByHyst = FALSE
CellAcceptedByHyst = TRUE
Data Sheet
73
2001-12-17