S/UNI®-ATLAS-3200 Telecom Standard Product Data Sheet
Preliminary
The QOS parameters of the internal PM table are described below. N.B. TUCD0 and TUCD0+1
(which are referred to in this table) are internally computed values in accordance with Bellcore
GR-1248-CORE, ITU-T I.610 and ITU-T I.356. TUCD is the difference between the number of
cells transmitted in the block (as indicated in the fwd PM cell) and the number received. For
example, TUCD0 =
{[TUC0(t) – TUC0(t-1)] Mod 64K} - {[TRCC0(t) – TRCC0(t-1)] Mod 64K}.
Table 33 QOS Parameters for Performance Management
Name
BIP16 (16)
Description
When this PM instance is the source of forward monitoring cells, the Bit-Interleaved
Parity 16 is the even parity error detection code computed over the information field
of the block of user data cells (CLP0+1) transmitted after the last Forward
Monitoring PM cell.
When this PM instance terminates or monitors Forward Monitoring cells, BIP-16 is
the even parity error detection code computed over the information field of user data
cells received after the last Forward Monitoring PM cell.
Current Cell Count
CLP0 (16)
When this PM process is the source of Forward Monitoring cells, this count is
incremented each time a CLP0 user cell is transmitted. It is used along with the
Fwd TUC_0 field to determine the TUC_0 field of newly generated Forward PM
cells.
When this PM process terminates/monitors Forward Monitoring cells, this count is
incremented each time a CLP0 user cell is received. It is used along with Fwd
TRCC_0 to determine the new TRCC_0 upon reception of a Forward PM cell, and
thus to calculate the Total User Cell Difference CLP0.
Current Cell Count
CLP0+1 (16)
When this PM process is the source of Forward Monitoring cells, this count is
incremented each time a user cell is transmitted. Whenever this count equals or
exceeds the programmed PM block size, a request to generate a Forward PM cell
will be made, subject to cell slot availability and pacing. It is also used along with
the Fwd TUC_0+1 field to determine the TUC_0+1 field of newly generated Forward
PM cells.
When this PM process terminates/monitors Forward Monitoring cells, this count is
incremented each time a user cell is received. It is used along with Fwd TRCC_0+1
to determine the new TRCC_0+1 upon reception of a Forward PM cell, and thus to
calculate the Total User Cell Difference CLP0+1.
BLER Stored (8)
The Stored Block Error Result is the Block Error Result calculated on reception of
the previous Forward PM cell. It is stored in this field until it can be used by the
generated Backwards Reporting cell.
Fwd TRCC_0 (16)
Total Received Cell Count CLP0. This field is used when terminating/ monitoring
Forward PM cells, and stores a running count modulo 65536 of the total number of
received CLP0 user cells previous to the most recent Forward Monitoring cell. Fwd
TRCC_0 is inserted in the TRCC_0 field of the generated Backwards Reporting cell.
It is also used along with the Current Cell Count CLP0 to determine the new
TRCC_0 upon reception of a Forward PM cell.
Fwd TRCC_0+1
(16)
Total Received Cell Count CLP0+1. This field is used when terminating/ monitoring
Forward PM cells, and stores a running count modulo 65536 of the total number of
received user cells previous to the most recent Forward Monitoring cell. Fwd
TRCC_0+1 is inserted in the TRCC_0+1 field of the generated Backwards Reporting
cell. It is also used along with the Current Cell Count CLP0+1 to determine the new
TRCC_0+1 upon reception of a Forward PM cell.
Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use
Document ID: PMC-1990553, Issue 4
124
PMC [ PMC-SIERRA, INC ]
