SNDCP Data Statistics:
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Un-Acknowledged mode:
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SN-PDUs received
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Description: This proprietary counter
indicates the total number of SN-PDUs received by SNDCP.
Triggers:
Increments when an SN-PDU is received by SNDCP.
Availability:
per SGSN service
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SN-PDU Bytes received
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Description: This proprietary counter
indicates the total number of SN-PDU bytes received by SNDCP.
Triggers:
Increments when an SN-PDU is received by SNDCP.
Availability:
per SGSN service
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SN-PDUs dropped
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Description: This proprietary counter
indicates the total number of SN-PDUs dropped at SNDCP due to various
reasons.
Triggers: Increments when SN-PDUs are dropped
at SNDCP for various error cases as explained by the specific Drop
reason counters below.
Availability: per SGSN service
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SN-PDU Bytes dropped
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Description: This proprietary counter
indicates the total number of SN-PDU bytes dropped at SNDCP due
to various reasons.
Triggers: Increments when SN-PDUs
are dropped at SNDCP for various error cases as explained by the
specific Drop reason counters below.
Availability:
per SGSN service
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SN-PDU Drop Reason:
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Invalid SAPI State
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Description: This proprietary counter
indicates the total number of SN-PDUs dropped at SNDCP due to invalid
SAPI state.
Triggers: Increments when SN-PDUs are received
in invalid SAPI state.
Availability: per SGSN service
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Invalid PDP Ctx
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Description: This proprietary counter
indicates the total number of SN-PDUs dropped at SNDCP due to invalid
PDP context.
Triggers: Increments when SN-PDUs are
received by a non-existent PDP Context or non-existent subscriber.
Availability:
per SGSN service
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Decode Failure
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Description: This proprietary counter
indicates the total number of SN-PDUs dropped at SNDCP due to decode
failure.
Triggers: Increments when Decode failures
occur for SN-PDUs.
Availability: per SGSN service
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Reassembly Drops:
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Discard State
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Description: This proprietary counter
indicates the total number of SN-PDUs dropped at SNDCP in discard
state.
Triggers: Increments when SN-PDUs are dropped
and an unexpected segment is received to enter discard state. SNDCP
entity expects either a first segment or subsequent segment. Reception
of last segment clears this state.
Availability: per
SGSN service
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Rx First Seg State
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Description: This proprietary counter
indicates the total number of SN-PDUs dropped at SNDCP in Receive
First Segment state.
Triggers: In receive first segment
state, only first segment of N-PDU is expected. If subsequent segmented
is received, it is dropped with this reason and enters discard state.
Availability:
per SGSN service
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Rx Subsequent Seg State
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Description: This proprietary counter
indicates the total number of SN-PDUs dropped at SNDCP due to reassembly
failure.
Triggers: In receive subsequent segment state,
only subsequent segments of N-PDU are expected. If first segment
is received, it is dropped with this reason and enters discard state.
Availability:
per SGSN service
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New First Segment
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Description: This proprietary counter
indicates the total number of buffered SN-PDUs dropped at SNDCP
due to reception of new N-PDU.
Triggers: Increments
when reception of new N-PDU drops buffered SN-PDUs, if any with
this reason.
Availability: per SGSN service
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Reassembly Failure
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Description: This proprietary counter
indicates the total number of SN-PDUs dropped at SNDCP due to reassembly
failure.
Triggers: Increments when SN-PDUs are dropped
at SNDCP due to reassembly failure.
Availability: per
SGSN service
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Reassembly Timeout
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Description: This proprietary counter
indicates the total number of SN-PDUs dropped at SNDCP due to reassembly
timeout.
Triggers: Increments when the buffered segments
are dropped and the last segment is not received before reassembly
timer expiry.
Availability: per SGSN service
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DCOMP Error
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Description: This proprietary counter
indicates the total number of SN-PDUs dropped at SNDCP due to DCOMP
(Data Compression algorithm ID) error.
Triggers: Increments
when SN-PDUs are received with invalid DCOMP value or DCOMP value
different from that negotiated between MS and SGSN.
Availability:
per SGSN service
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PCOMP Error
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Description: This proprietary counter
indicates the total number of SN-PDUs dropped at SNDCP due to PCOMP
(Protocol Header Compression algorithm ID).
Triggers:
Increments when SN-PDUs are received with invalid PCOMP value or
PCOMP value different from that negotiated between MS and SGSN.
Availability:
per SGSN service
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PDP Ctx Modified
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Description: This proprietary counter
indicates the total number of SN-PDUs dropped at SNDCP due to PDP
modification.
Triggers: Increments when buffered data
segments (SN-PDUs) are dropped during PDP context modification.
Availability:
per SGSN service
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PDP Ctx Deleted
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Description: This proprietary counter
indicates the total number of SN-PDUs dropped at SNDCP due to PDP
deletion.
Triggers: Increments when buffered data segments
(SN-PDUs) are dropped at SNDCP due to PDP context deletion.
Availability:
per SGSN service
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Other Reasons
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Description: This proprietary counter
indicates the total number of SN-PDUs dropped at SNDCP due to any
other reason than those mentioned above.
Triggers:
Increments when buffered data segments (SN-PDUs) are dropped at
SNDCP due to other reasons than those mentioned above.
Availability:
per SGSN service
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