PXB4340E Datasheet, PDF (42/185 Pages) Infineon Technologies AG – ICs for Communications

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The data collection procedure is independent of the FM/BR cell mechanism. It uses one of the
128 data collection processors contained in the PXB 4340 AOP. Each of them can evaluate the
BR data flow from upstream or downstream direction. Data collection can be done at any node
along the way of the BR cells. In the example of ILJXUH  Nodes a or b could be selected for
data collection. It can be done concerning the data of an incoming BR cell or after a BLER0+1
calculation concerning the data of an incoming FM cell. The TUCdiff/TUCdiff0 calculation has to
be done before the Data Collection can be started. In the Data Collection processing it is first
proved whether TUCdiff/TUCdiff0 is zero. If it is zero, the BLER0+1 is checked. If TUCdiff/
TUCdiff0 is not zero, it is not reasonable to prove the BLER0+1. According to the defined
thresholds certain counters have to be updated. 7DEOH  is a summery of counters, which are
updated for Data Collection (see VHFWLRQ  page 123).
7DEOH  8SGDWHG FRXQWHUV IRU 'DWD &ROOHFWLRQ
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WHUP
IMPB
impaired blocks
SECB
severely errored cell blocks
SECBERR
severely errored cell block errored counter
ERRC
errored cells
LOSTC
lost cells
MISC
misinserted cells
TLOST0
total lost cells
SECBMIS
severely errored cell blocks of misinserted cells
LOSTC0
lost cells of the CLP=0 flow
TLOSTC0
total lost cells of the CLP=0 flow
TRANSUC0
transmitted user cells of CLP=0 flow
TRANSUC
transmitted user cells of CLP-0+1 flow
The Counters SECB, SECBERR, SECBMIS and TLOSTC0 are updated if a related threshold
value is reached.
The threshold values are set in several µP registers (see VHFWLRQ  page 71). TUCdiff is the
difference between the transmitted cells of the PM originating point and the received cells of the
PM terminating point. TUCdiff is calculated for the CLP-0+1 flow and TUCdiff0 for the CLP=0
flow.
The BLER-0+1 counts the BIP16 errors of a block of user cells if no user cells are lost or
misinserted, i.e. TUCdiff = 0.
Data Sheet
2-42
04.2000