01 05 board no.

UMG8900
Performance Metrics Reference 6 No. of Virtual Media Gateway

6 No. of Virtual Media Gateway

About This Chapter

6.1 H.248 Application Statistics
This task is used to measure H.248 messages, transactions, and commands transmitted between
the CMU and the MGC. The measure object is the VMGW.
6.2 Context Management Statistics
This task is used to measure context handling conditions of the MGW under the control of the
MGC. The measure object is the VMGW.
6.3 Number of Terminations Occupied by Context
This task is used to measure termination occupation in the MGW under the control of the MGC.
The terminations include IP terminations, ATM terminations, and TDM terminations. The
measure object is the VMGW.
6.4 Number of Resources Occupied by Context of the CMU Board
This task is used to measure the resource usage of the MGW under the control of the MGC. The
resources refer to the channels used for codec conversion, rate adaptation, announcement, audio
mixing, echo cancellation, and channels used by data services. These channels include the
transcoder (TC), echo cancellation (EC), and audio mixing resources. The measure object is the
VMGW.
6.5 Conference Call Statistics
This task is used to count successful conference calls. The measure object is the VMGW.
6.6 Voice Call Statistics
This task is used to measure resource features of the MGW. The measure object is the VMGW.

Issue 01 (2007-07-26) Huawei Technologies Proprietary 6-1

UMG8900
6 No. of Virtual Media Gateway Performance Metrics Reference

6.1 H.248 Application Statistics
This task is used to measure H.248 messages, transactions, and commands transmitted between
the CMU and the MGC. The measure object is the VMGW.

6.1.1 Number of Received Message
6.1.2 Number of Sent Message
6.1.3 Number of Received Trans Request
6.1.4 Number of Sent Trans Request
6.1.5 Number of Received Trans Response
6.1.6 Number of Sent Trans Response
6.1.7 Number of Received Action Request
6.1.8 Number of Sent Action Request
6.1.9 Number of Received Action Response
6.1.10 Number of Sent Action Response
6.1.11 Number of Received SERVICECHANGE Request
6.1.12 Number of Received SERVICECHANGE Response
6.1.13 Number of Sent SERVICECHANGE Request
6.1.14 Number of Sent SERVICECHANGE Response
6.1.15 Number of Sent NOTIFY Request
6.1.16 Number of Received NOTIFY Response
6.1.17 Number of Received ADD Request
6.1.18 Number of Sent ADD Response
6.1.19 Number of Received SUBTRACT Request
6.1.20 Number of Sent SUBTRACT Response
6.1.21 Number of Received MOVE Request
6.1.22 Number of Sent MOVE Response
6.1.23 Number of Received MODIFY Request
6.1.24 Number of Sent MODIFY Response
6.1.25 Number of Received AUDITVALUE Request
6.1.26 Number of Sent AUDITVALUE Response
6.1.27 Number of Received AUDITCAPABILITY Request
6.1.28 Number of Sent AUDITCAPABILITY Response
6.1.29 Number of Received H.248 Bytes

6-2 Huawei Technologies Proprietary Issue 01 (2007-07-26)

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6.1.30 Number of Sent H.248 Bytes
6.1.31 Number of ADD Request Err Process Times
6.1.32 Number of SUBTRACT Request Err Process Times
6.1.33 Number of MODIFY Request Err Process Times
6.1.34 Number of MOVE Request Err Process Times
6.1.35 Number of AUDITVALUE Request Err Process Times
6.1.36 Number of SERVICECHANGE Request Err Process Times
6.1.37 Number of Received NOTIFY Err Process Times
6.1.38 Number of Received SERVICECHANGE Err Process Times
6.1.39 Number of AUDITCAPABILITY Req Err Process Times
6.1.40 Number of Sent Error Command
6.1.41 Number of Sent Error NOTIFY Command
6.1.42 Number of Sent Error SERVICECHANGE Command

6.1.1 Number of Received Message

Description
This item refers to the number of H.248 messages that are received by a specific VMGW from
the MGC. The item is counted by the application layer of the CMU, after the H.248 protocol
stack successfully decodes the received messages.

Unit
None

Measurement Point
The item is measured after the H.248 protocol stack successfully decodes the messages received
by the MGW from the MGC. Refer to Figure 6-1.

Figure 6-1 Number of received message

MGC MGW

H.248 MSG

A
H.248 MSG


UMG8900

Measurement Types
Duration sampling type

Formula
Result = Total number of received messages

6.1.2 Number of Sent Message
Description
This item refers to the number of H.248 messages sent by the MGW to the MGC. The item is
counted by the application layer of the CMU, before the H.248 protocol stack encodes the
messages.

Unit
None

Measurement Point
The item is measured when the MGW sends messages to the MGC. Refer to Figure 6-2.

Figure 6-2 Number of sent message

MGC MGW

H.248 MSG

A
H.248 MSG

Measurement Types

Formula
Result = Total number of sent messages

6.1.3 Number of Received Trans Request
Description
This item refers to the number of transactions contained in H.248 messages that are received by
the specific VMGW from the MGC. The item is counted by the application layer of the CMU,
after the H.248 protocol stack successfully decodes the messages.


UMG8900

Unit
None

Measurement Point
The item is measured when the MGC sends requests to the MGW. Refer to Figure 6-3.

Figure 6-3 Number of received trans request

MGC MGW

H.248PS PPU CMU

MSG -->Transation1
Transation2
H.248 MSG REQ ...

A

H.248 MSG RESP
MSG <-- Transation1
Transation2
...

Measurement Types

Formula
Result = Total number of received transaction requests

6.1.4 Number of Sent Trans Request

Description
This item refers to the number of transactions contained in the H.248 messages sent by the MGW
to the MGC. The item is counted by the application layer of the CMU, before the H.248 protocol
stack encodes the messages.

Unit
None

Measurement Point
The item is measured when the MGW sends requests to the MGC. Refer to Figure 6-4.


UMG8900

Figure 6-4 Number of sent trans request

MGC MGW

H.248PS PPU CMU

H.248 MSG REQ
MSG <-- Transation1
Transation2
... A

H.248 MSG RESP
MSG -->Transation1
Transation2
...

Measurement Types

Formula
Result = Total number of sent transaction requests

6.1.5 Number of Received Trans Response
Description
This item refers to the number of transactions contained in H.248 response messages that are
received by the specific VMGW from the MGC. The item is counted by the application layer
of the CMU, after the H.248 protocol stack successfully decodes the messages.

Unit
None

Measurement Point
The item is measured when the MGW receives transaction responses from the MGC. Refer to
Figure 6-5.


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Figure 6-5 Number of received trans response

MGC MGW

H.248PS PPU CMU

MSG <-- Transation1
Transation2
H.248 MSG REQ ...

MSG -->Transation1
H.248 MSG RESP Transation2
...
A

Measurement Types

Formula
Result = Total number of received transaction responses

6.1.6 Number of Sent Trans Response
Description
This item refers to the number of transactions contained in the H.248 response messages sent
by the MGW to the MGC. The item is counted by the application layer of the CMU, before the
H.248 protocol stack encodes the messages.

Unit
None

Measurement Point
The item is measured when the MGW sends transaction responses to the MGC. Refer to Figure
6-6.


UMG8900

Figure 6-6 Number of sent trans response

MGC MGW

H.248PS PPU CMU

MSG -->Transation1

H.248 MSG REQ Transation2
...
MSG <-- Transation1
Transation2
H.248 MSG RESP ...

A

Measurement Types

Formula
Result = Total number of sent transaction responses

6.1.7 Number of Received Action Request
Description
According to H.248, one message may contain several transactions and one transaction may
contain several actions. This item refers to the number of action requests contained in H.248
request messages that are received by the specific VMGW from the MGC. The item is counted
by the application layer of the CMU, after the H.248 protocol stack successfully decodes the
received messages.

Unit
None

Measurement Point
The item is measured when the MGW receives requests from the MGC. Refer to Figure 6-7.


UMG8900

Figure 6-7 Number of received action request

MGC MGW

H.248PS PPU CMU

MSG -->Transation1

H.248 MSG REQ Transation2
...
A

H.248 MSG RESP

MSG <-- Transation1
Transation2
...

Measurement Types

Formula
Result = Total number of received action requests

6.1.8 Number of Sent Action Request
Description
contain several actions. This item refers to the number of actions contained in the H.248 request
messages sent by the MGW to the MGC. The item is counted by the application layer of the
CMU, before the H.248 protocol stack encodes the messages.

Unit
None

Measurement Point
The item is measured when the MGW sends requests to the MGC. Refer to Figure 6-8.


UMG8900

Figure 6-8 Number of sent action request

MGC MGW

H.248PS PPU CMU

MSG <--Transation1 <-Action1
... <-Action2
H.248 MSG REQ ...
A

H.248 MSG RESP

MSG -->Transation1 ->Action1
... ->Action2
...

Measurement Types

Formula
Result = Total number of sent action requests

6.1.9 Number of Received Action Response
Description
contain several actions. This item refers to the number of actions contained in H.248 response
messages that are received by the specific VMGW from the MGC. The item is counted by the
application layer of the CMU, after the H.248 protocol stack successfully decodes the response
messages.

Unit
None

Measurement Point
The item is measured when the MGW receives responses from the MGC. Refer to Figure 6-9.


UMG8900

Figure 6-9 Number of received action response

MGC MGW

H.248PS PPU CMU

... <-Action2
H.248 MSG REQ ...

H.248 MSG RESP

MSG -->Transation1 ->Action1 A
... ->Action2
...

Measurement Types

Formula
Result = Total number of received action responses

6.1.10 Number of Sent Action Response
Description
contain several actions. This item refers to the number of actions contained in the H.248 response
messages sent by the MGW to the MGC. The item is counted by the application layer of the
CMU, before the H.248 protocol stack encodes the messages.

Unit
None

Measurement Point
The item is measured when the MGW sends responses to the MGC. Refer to Figure 6-10.


UMG8900

Figure 6-10 Number of sent action response

MGC MGW

H.248PS PPU CMU

MSG -->Transation1 ->Action1
H.248 MSG REQ ... ->Action2
...

H.248 MSG RESP

... A
<-Action2
...

Measurement Types

Formula
Result = Total number of sent action responses

6.1.11 Number of Received SERVICECHANGE Request
Description
The SERVICECHANGE command in the request is a service change command. After receiving
this command, the MGW performs service change as specified in the request. The change can
be that the MGC requires the MGW to exit from the service or to register with another MGC.
This item refers to the number of H.248 SERVICECHANGE command requests that are
received by the VMGW from the MGC.

Unit
None

Measurement Point
The item is measured when the MGW receives SERVICECHANGE messages from the MGC.
The MGC sends this request to the MGW for service change of the MGW. Refer to Figure
6-11.


UMG8900

Figure 6-11 Number of received SERVICECHANGE request

MGC MGW

SERVICE CHANGE REQ

A
SERVICE CHANGE RESP

Measurement Types

Formula
Result = Total number of received SERVICECHANGE requests

6.1.12 Number of Received SERVICECHANGE Response
Description
l The MGW registers with, deregisters with, or reports the status changes of terminations to
the MGC by sending the SERVICECHANGE commands.
l This item refers to the number of responses to the H.248 SERVICECHANGE command,
which are returned from the MGC to the VMGW. The item is counted by the application
layer of the CMU.

Unit
None

Measurement Point
This task is measured when the MGW receives SERVICECHANGE responses from the MGC.
The MGC sends this response after it processes the service change request or termination status
change reported by the MGW. Refer to Figure 6-12.

Figure 6-12 Number of received SERVICECHANGE response

MGC MGW

SERVICE CHANGE REQ

SERVICE CHANGE RESP

A


UMG8900

Measurement Types

Formula
Result = Total number of received SERVICECHANGE responses

6.1.13 Number of Sent SERVICECHANGE Request

Description
l The MGW registers with, deregisters with, or reports the status changes of terminations to
the MGC by sending the SERVICECHANGE commands.
l This item refers to the number of H.248 SERVICECHANGE requests that are sent by the
VMGW to the MGC.

Unit
None

Measurement Point
The item is measured when the MGW sends SERVICECHANGE requests to the MGC. The
MGW sends this request when its status or the status of the terminations changes. Refer to Figure
6-13.

Figure 6-13 Number of sent SERVICECHANGE request

MGC MGW

SERVICE CHANGE REQ

A

SERVICE CHANGE RESP

Measurement Types

Formula
Result = Total number of sent SERVICECHANGE requests


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6.1.14 Number of Sent SERVICECHANGE Response

Description
l The SERVICECHANGE command is a service change command. After receiving this
command, the MGW performs service change as specified in the request. The change can
be that the MGC requires the MGW to exit from the service or to register with another
MGC. The MGW sends the response to the MGC after processing the request.
l This item refers to the number of responses to the H.248 SERVICECHANGE command,
which are sent by the VMGW to the MGC.

Unit
None

Measurement Point
The item is measured when the MGW sends SERVICECHANGE responses to the MGC. The
MGW sends the response to the MGC after processing the specific service change. Refer to
Figure 6-14.

Figure 6-14 Number of sent SERVICECHANGE response

MGC MGW

SERVICE CHANGE REQ

SERVICE CHANGE RESP
A

Measurement Types

Formula
Result = Total number of sent SERVICECHANGE responses

6.1.15 Number of Sent NOTIFY Request

Description
l This item refers to the number of H.248 NOTIFY requests that are sent by the VMGW to
the MGC. The item is counted by the application layer of the CMU.
l The MGW reports the events such as the dialing event and detection of fax tone to the MGC
by sending the NOTIFY requests.


UMG8900

Unit
None

Measurement Point
The item is measured when the MGW sends NOTIFY requests to the MGC. The MGW informs
the MGC of events through the NOTIFY requests. Refer to Figure 6-15.

Figure 6-15 Number of sent NOTIFY request

MGC MGW

NOTIFY REQ

A

NOTIFY RESP

Measurement Types

Formula
Request = Total number of sent NOTIFY requests

6.1.16 Number of Received NOTIFY Response

Description
l This item refers to the number of responses to the H.248 NOTIFY command, which are
received by the VMGW from the MGC. The item is counted by the application layer of the
CMU.
l After the MGW sends the NOTIFY command to the MGC to report events, the MGC
responds to the NOTIFY command.

Unit
None

Measurement Point
The item is measured when the MGW receives NOTIFY responses from the MGC. The MGC
sends the response to the MGW after processing the reported events. Refer to Figure 6-16.


UMG8900

Figure 6-16 Number of received NOTIFY response

MGC MGW

NOTIFY REQ

NOTIFY RESP
A

Measurement Types

Formula
Result = Total number of received NOTIFY responses

6.1.17 Number of Received ADD Request
Description
l This item refers to the number of H.248 ADD requests that are received by the VMGW
from the MGC. The item is counted by the application layer of the CMU.
l Before call establishment, the MGC requires the MGW to allocate terminations to the calls
by sending the ADD command.

Unit
None

Measurement Point
The item is measured when the MGW receives ADD requests from the MGC. The MGW
receives this request during call establishment. Refer to Figure 6-17.

Figure 6-17 Number of received ADD request

MGC MGW

ADD REQ

A

ADD RESP


UMG8900

Measurement Types

Formula
Result = Total number of received ADD requests

6.1.18 Number of Sent ADD Response
Description
This item refers to the number of responses to the H.248 ADD command, which are returned
from the VMGW to the MGC. The item is counted by the application layer of the CMU. During
call establishment, the MGC requires the MGW to allocate terminations by sending the ADD
command. The MGW returns the responses to the MGC after processing the requests.

Unit
None

Measurement Point
The item is measured when the MGW sends ADD responses to the MGC. The MGW sends the
response to the MGC after allocating the terminations. Refer to Figure 6-18.

Figure 6-18 Number of sent ADD response

MGC MGW

ADD REQ

ADD RESP
A

Measurement Types

Formula
Result = Total number of sent ADD responses


UMG8900

6.1.19 Number of Received SUBTRACT Request
Description
l This item refers to the number of H.248 SUBTRACT requests that are received by the
VMGW from the MGC. The item is counted by the application layer of the CMU.
l After the call is released, the MGC requires the MGW to reclaim the resources by sending
the SUBTRACT requests.

Unit
None

Measurement Point
The item is measured when the MGW receives SUBTRACT requests from the MGC. The MGC
sends the request to the MGW, requiring the MGW to release the call. Refer to Figure 6-19.

Figure 6-19 Number of received SUBTRACT request

MGC MGW

SUBTRACT REQ

A

SUBTRACT RESP

Measurement Types

Formula
Result = Total number of received SUBTRACT requests

6.1.20 Number of Sent SUBTRACT Response
Description
l This item refers to the number of responses to the H.248 SUBTRAC command, which are
returned from the VMGW to the MGC. The item is counted by the application layer of the
CMU.
l After the call is released, the MGC sends SUBTRACT requests to the MGW, and then the
MGW returns the responses containing the statistic information such as traffic.

Unit
None


UMG8900

Measurement Point
The item is measured when the MGW sends SUBTRACT responses to the MGC. The MGW
sends the response after releasing the call. Refer to Figure 6-20.

Figure 6-20 Number of sent SUBTRACT response

MGC MGW

SUBTRACT REQ

SUBTRACT RESP
A

Measurement Types

Formula
Result = Total number of sent SUBTRACT responses

6.1.21 Number of Received MOVE Request
Description
l This item refers to the number of H.248 MOVE requests that are received by the VMGW
l The MGC generally sends the MOVE requests to the MGW when a subscriber moves from
one office to another after a call is established.

Unit
None

Measurement Point
The item is measured when the MGW receives MOVE requests from the MGC. The MGW
receives the request when switchover occurs. Refer to Figure 6-21.


UMG8900

Figure 6-21 Number of received MOVE request

MGC MGW

MOVE REQ

A

MOVE RESP

Measurement Types

Formula
Result = Total number of received MOVE requests

6.1.22 Number of Sent MOVE Response
Description
l This item refers to the number of responses to the H.248 MOVE command, which are
CMU.
l The MGC generally sends the MOVE requests to the MGW when a subscriber moves from
one office to another after a call is established. The MGW returns the responses to the MGC
after processing the requests.

Unit
None

Measurement Point
The item is measured when the MGW sends MOVE responses to the MGC. The MGW sends
the response to the MGC after processing the switchover request. Refer to Figure 6-22.

Figure 6-22 Number of sent MOVE response

MGC MGW

MOVE REQ

MOVE RESP
A


UMG8900

Measurement Types

Formula
Result = Total number of sent MOVE responses

6.1.23 Number of Received MODIFY Request

Description
l This item refers to the number of H.248 MODIFY requests that are received by the VMGW
l During call connection, the MGC sends the MODIFY requests to modify the attributes of
terminations, such as playing announcement to or collecting digits of a termination and
reporting information of the peer termination to the local termination.

Unit
None

Measurement Point
The item is measured when the MGW receives MODIFY requests from the MGC. The MGC
sends the request to modify the attributes of a termination. Refer to Figure 6-23.

Figure 6-23 Number of received MODIFY request

MGC MGW

MODIFY REQ

A

MODIFY RESP

Measurement Types

Formula
Result = Total number of received MODIFY requests


UMG8900

6.1.24 Number of Sent MODIFY Response

Description
l This item refers to the number of responses to the H.248 MODIFY command, which are
CMU.
l During call connection, the MGC sends the MODIFY requests to modify the attributes of
terminations, such as announcement to or collecting digits of a termination and reporting
information of the peer termination to the local termination. The MGW returns the response
containing the processing result to the MGC.

Unit
None

Measurement Point
The item is measured when the MGW sends MODIFY responses to the MGC. The MGW sends
the response after modifying the attributes of the termination. Refer to Figure 6-24.

Figure 6-24 Number of sent MODIFY response

MGC MGW

MODIFY REQ

MODIFY RESP
A

Measurement Types

Formula
Result = Total number of sent MODIFY responses

6.1.25 Number of Received AUDITVALUE Request

Description
l This item refers to the number of H.248 AUDITVALUE requests that are received by the
VMGW from the MGC. The item is counted by the application layer of the CMU.
l The MGC obtains the status and statistic information of the MGW and terminations by
sending the AUDITVALUE requests to the MGW.


UMG8900

Unit
None

Measurement Point
The item is measured when the MGW receives AUDITVALUE requests from the MGC. The
MGC sends the request to obtain the information of the MGW or terminations. Refer to Figure
6-25.

Figure 6-25 Number of received AUDITVALUE request

MGC MGW

AUDITVALUE REQ

A

AUDITVALUE RESP

Measurement Types

Formula
Result = Total number of received AUDITVALUE requests

6.1.26 Number of Sent AUDITVALUE Response

Description
l This item refers to the number of responses to the H.248 AUDITVALUE command, which
are returned from the VMGW to the MGC. The item is counted by the application layer of
the CMU.
l The MGW reports the status and statistic information of itself and its terminations to the
MGC by sending the AUDITVALUE responses.

Unit
None

Measurement Point
The item is measured when the MGW sends AUDITVALUE responses to the MGC. The MGW
sends the response after processing the AUDITVALUE request. Refer to Figure 6-26.


UMG8900

Figure 6-26 Number of sent AUDITVALUE response

MGC MGW

AUDITVALUE REQ

AUDITVALUE RESP
A

Measurement Types

Formula
Result = Total number of sent AUDITVALUE responses

6.1.27 Number of Received AUDITCAPABILITY Request
Description
l This item refers to the number of H.248 AUDITCAPABILITY requests that are received
by the VMGW from the MGC. The item is counted by the application layer of the CMU.
l The MGC obtains the events and signals supported by the terminations of the MGW by
sending the AUDITCAPABILITY requests to the MGW.

Unit
None

Measurement Point
The item is measured when the MGW receives AUDITCAPABILITY requests from the MGC.
The MGC sends the request to obtain the capabilities of terminations of the MGW. Refer to
Figure 6-27.

Figure 6-27 Number of received AUDITCAPABILITY request

MGC MGW

AUDITCAPABILITY REQ

A

AUDITCAPABILITY RESP


UMG8900

Measurement Types

Formula
Result = Total number of received AUDITCAPABILITY requests

6.1.28 Number of Sent AUDITCAPABILITY Response

Description
l This item refers to the number of responses to the H.248 AUDITCAPABILITY command,
which are returned from the VMGW to the MGC. The item is counted by the application
layer of the CMU.
l The MGW reports the events and signals supported by terminations of the MGW to the
MGC by sending the AUDITCAPABILITY responses.

Unit
None

Measurement Point
The item is measured when the MGW sends AUDITCAPABILITY responses to the MGC. The
MGW sends the response after processing the AUDITCAPABILITY request. Refer to Figure
6-28.

Figure 6-28 Number of sent AUDITCAPABILITY response

MGC MGW

AUDITCAPABILITY REQ

A

Measurement Types

Formula
Result = Total number of sent AUDITCAPABILITY responses


UMG8900

6.1.29 Number of Received H.248 Bytes
Description
l This item refers to the number of H.248 bytes received by the VMGW from the MGC. The
item is counted by the application layer of the CMU.
l This item refers to the number of bytes including the requests and responses in all H.248
messages received by the MGW.

Unit
Byte

Measurement Point
The item is measured when the MGW receives H.248 messages sent by the MGC. Refer to
Figure 6-29.

Figure 6-29 Number of received H.248 bytes

MGC MGW

H.248 MSG

A

H.248 MSG

Measurement Types

Formula
Result = Total number of received H.248 bytes

6.1.30 Number of Sent H.248 Bytes
Description
l This item refers to the number of H.248 bytes sent by the VMGW to the MGC. The item
is counted by the application layer of the CMU.
l This item refers to the number of bytes in all H.248 messages including the requests and
responses sent by the MGW.

Unit
Byte


UMG8900

Measurement Point
The item is measured when the MGW sends H.248 messages to the MGC. Refer to Figure
6-30.

Figure 6-30 Number of sent H.248 bytes

MGC MGW

H.248 MSG

H.248 MSG

A

Measurement Types

Formula
Result = Total number of sent H.248 bytes

6.1.31 Number of ADD Request Err Process Times
Description
l This item refers to the number of failures in processing the ADD requests. The item is
counted by the MGW.
l During call establishment, the MGC requires the MGW to allocate terminations by sending
the ADD requests to the MGW. If the ADD requests are incorrect, the resources are
insufficient or the MGW fails to process the requests, the MGW returns error responses.

Unit
Number of times

Measurement Point
The item is measured when the MGW receives the ADD requests from the MGC. The value of
this item is added when the ADD requests are incorrect or the MGW fails to process the requests.
Refer to Figure 6-31.


UMG8900

Figure 6-31 Number of ADD request err process times

MGC MGW

ADD REQ

A

ADD RESP

Measurement Types

Formula
Result = Total number of ADD request processing failures in a measurement period

6.1.32 Number of SUBTRACT Request Err Process Times
Description
l This item refers to the number of failures in processing the SUBTRACT requests. The item
is counted by the MGW.
l The MGC sends the SUBTRACT requests to the MGW after the call is released. If the
requests are incorrect or the MGW fails to process the requests, the MGW returns error
responses.

Unit
Number of times

Measurement Point
The item is measured when the MGW receives the SUBTRACT requests from the MGC. The
value of this item is added when the SUBTRACT requests are incorrect or the MGW fails to
process the requests. Refer to Figure 6-32.

Figure 6-32 Number of SUBTRACT request err process times

MGC MGW

SUBTRACT REQ

A

SUBTRACT RESP


UMG8900

Measurement Types

Formula
Result = Total number of SUBTRACT request processing failures in a measurement period

6.1.33 Number of MODIFY Request Err Process Times

Description
This item refers to the number of failures in processing the MODIFY requests. The item is
counted by the MGW.

The MGC requires the MGW to modify the information of terminations by sending the MODIFY
requests to the MGW. If the requests are incorrect or the MGW fails to process the requests, the
MGW returns the error responses.

Unit
Number of times

Measurement Point
The item is measured when the MGW receives the MODIFY requests from the MGC. The value
of this item is added when the MODIFY requests are incorrect or the MGW fails to process the
requests. Refer to Figure 6-33.

Figure 6-33 Number of MODIFY request err process times

MGC MGW

MODIFY REQ

A

MODIFY RESP

Measurement Types

Formula
Result = Total number of MODIFY request processing failures in a measurement period


UMG8900

6.1.34 Number of MOVE Request Err Process Times
Description
This item refers to the number of failures in processing the MOVE requests. The item is counted
by the MGW.
After call connection, the MGC sends the MOVE requests to the MGW when a subscriber moves
from one office to another. If the requests are incorrect or the MGW fails to process the requests,
the MGW returns error responses.

Unit
Number of times

Measurement Point
The item is measured when the MGW receives the MOVE requests from the MGC. The value
of this item is added when the MOVE requests are incorrect or the MGW fails to process the
requests. Refer to Figure 6-34.

Figure 6-34 Number of MOVE request err process times

MGC MGW

MOVE REQ

A

MOVE RESP

Measurement Types

Formula
Result = Total number of MOVE request processing failures in a measurement period

6.1.35 Number of AUDITVALUE Request Err Process Times
Description
This item refers to the number of failures in processing the AUDITVALUE requests. The item
is counted by the MGW.
The MGC obtains information of the MGW or terminations through AUDITVALUE requests.
If the requests are incorrect or the MGW fails to process the requests, the MGW returns error
responses.


UMG8900

Unit
Number of times

Measurement Point
The item is measured when the MGW receives the AUDITVALUE requests from the MGC.
The value of this item is added when the AUDITVALUE requests are incorrect or the MGW
fails to process the requests. Refer to Figure 6-35.

Figure 6-35 Number of AUDITVALUE request err process times

MGC MGW

AUDITVALUE REQ

AUDITVALUE RESP

A

Measurement Types

Formula
Result = Total number of AUDITVALUE request processing failures in a measurement period

6.1.36 Number of SERVICECHANGE Request Err Process Times

Description
This item refers to the number of failures in processing the SERVICECHANGE requests. The
item is counted by the MGW.

The MGC requires the MGW to process service change by sending the SERVICECHANGE
requests to the MGW. If the requests are incorrect or the MGW fails to process the requests, the
MGW returns error responses.

Unit
Number of times

Measurement Point
The item is measured when the MGW processes SERVICECHANGE requests. The value of
this item is added when the SERVICECHANG requests are incorrect or the MGW fails to
process the requests. Refer to Figure 6-36.


UMG8900

Figure 6-36 Number of SERVICECHANGE request err process times

MGC MGW

SERVICE CHANGE REQ

A
SERVICE CHANGE RESP

Measurement Types

Formula
Result = Total number of SERVICECHANGE request processing failures in a measurement
period

6.1.37 Number of Received NOTIFY Err Process Times
Description
This item refers to the number of failures in processing the NOTIFY requests. The item is counted
by the MGW.
The MGW reports events to the MGC by sending the NOTIFY requests. If the requests are
incorrect or the MGC fails to process the requests, the MGC returns the error responses.

Unit
Number of times

Measurement Point
The item is measured when the MGW processes NOTIFY requests. The value of this item is
added when the NOTIFY requests sent by the MGW are incorrect or the MGC fails to process
the requests. Refer to Figure 6-37.


UMG8900

Figure 6-37 Number of received NOTIFY err process times

MGC MGW

NOTIFY REQ

A

NOTIFY RESP

Measurement Types

Formula
Result = Total number of NOTIFY request processing failures in a measurement period

6.1.38 Number of Received SERVICECHANGE Err Process Times
Description
This item refers to the number of failures in processing the SERVICECHANGE requests. The
The MGW reports the service changes or status changes of terminations to the MGC by sending
the SERVICECHANGE requests. If the requests are incorrect or the MGC fails to process the
requests, the MGC returns the error responses.

Unit
Number of times

Measurement Point
The item is measured when the MGW processes SERVICECHANGE requests. The value of
this item is added when the SERVICECHANG requests sent by the MGW are incorrect or the
MGC fails to process the requests. Refer to Figure 6-38.


UMG8900

Figure 6-38 Number of received SERVICECHANGE err process times

MGC MGW

SERVICE CHANGE REQ

A
SERVICE CHANGE RESP

Measurement Types

Formula
Result = Total number of SERVICECHANGE request processing failures in a measurement
period

6.1.39 Number of AUDITCAPABILITY Req Err Process Times

Description
This item refers to the number of failures in processing the AUDITCAPABILITY requests. The

Unit
Number of times

Measurement Point
The item is measured when the MGW receives the AUDITCAPABILITY requests from the
MGC. Refer to Figure 6-39.

Figure 6-39 Number of AUDITCAPABILITY req err process times

MGC MGW

AUDITCAPABILITY REQ

A



UMG8900

Measurement Types

Formula
Result = Total number of AUDITCAPABILITY request processing failures in a measurement
period

6.1.40 Number of Sent Error Command
Description
This item refers to the number of times the Mc interface sends error commands in a measurement
period.

Unit
Number of times

Measurement Point
When the Mc interface sends an error command, the value of this item is added by one. Refer
to the following figure.

Figure 6-40 Number of sent error command

MGC MGW

The Mc interface sends error commands.

Measurement Types
Traffic sampling type

Formula
None

6.1.41 Number of Sent Error NOTIFY Command
Description
This item refers to the number of times the Mc interface sends error NOTIFY commands in a
measurement period.


UMG8900

Unit
Number of times

Measurement Point
When the Mc interface sends an error NOTIFY command, the value of this item is added by
one. Refer to the following figure.

Figure 6-41 Number of sent error NOTIFY command

MGC MGW

The Mc interface sends error notify
commands of H.248 messages.

Measurement Types

Formula
None

6.1.42 Number of Sent Error SERVICECHANGE Command
Description
This item refers to the number of times the Mc interface sends error SERVICECHANGE
commands in a measurement period.

Unit
Number of times

Measurement Point
When the Mc interface sends an error SERVICECHANGE command, the value of this item is
added by one. Refer to the following figure.


UMG8900

Figure 6-42 Number of sent error SERVICECHANGE command

MGC MGW

The Mc interface sends error ServiceChange
commands of H.248 messages.

Measurement Types
Traffic sampling type

Formula
None

6.2 Context Management Statistics
This task is used to measure context handling conditions of the MGW under the control of the
MGC. The measure object is the VMGW.

6.2.1 Total of Contexts Created Newly
6.2.2 Total of Successful Contexts Released
6.2.3 Total Duration
6.2.4 Peak of the Number of Context
6.2.5 Average of the Number of Context
6.2.6 Number of Context of TDM-TDM
6.2.7 Number of Context of IP-TDM
6.2.8 Number of Context of ATM-TDM
6.2.9 Number of Context of IP-IP
6.2.10 Number of Context of ATM-IP
6.2.11 Number of Context of ATM-ATM
6.2.12 Total MPTY Context Succeeded
6.2.13 Peak of the Number of MPTY Context
6.2.14 Average of the Number of MPTY Context
6.2.15 Number of Contexts with Call Loss
6.2.16 Number of Other Successfully Released Contexts


UMG8900

6.2.1 Total of Contexts Created Newly
Description
This item refers to the total number of contexts established by the VMGW under the control of
the MSC server.

Unit
None

Measurement Point
The item is measured when the VMGW generates a new context under the control of the MSC
server. The statistics can be used to estimate the status of call connections.
When the VMGW receives an H.248 ADD or MOVE message for a context, a new context is
created. In this case, the value of this item is added. Refer to Figure 6-43.

Figure 6-43 Total of contexts created newly

MGC MGW

ADD.REQ/MOVE.REQ
(CONTEXT=$)

ADD.RESP/MOVE.RESP A
(CONTEXT=C1)

Measurement Types
Average sampling type

Formula
Result = Total number of newly created contexts

6.2.2 Total of Successful Contexts Released
Description
This item refers to the total number of contexts that are successfully released by the VMGW
under the control of the MSC server. Due to the limited VMGW resources, some contexts may
fail to be established. Thus, call establishment may fail.

Unit
None


UMG8900

Measurement Point
The item is measured when the VMGW releases a created context under the control of an MSC
server. The statistics can be used to estimate the status of call release.

When the VMGW deletes the last termination of session C1, C1 is deleted and a new context is
created. In this case, the value of this item is added by one. Refer to Figure 6-44.

Figure 6-44 Total of successful contexts released

MGC MGW

SUB.REQ
(CONTEXT=C1)

SUB.RESP A
(CONTEXT=C1)

Measurement Types

Formula
Result = Total number of successfully released contexts

6.2.3 Total Duration

Description
This item refers to the time length from the establishment to release of contexts.

Unit
Second

Measurement Point
The VMGW releases a created context under the control of an MSC server. The CMU counts
the duration occupied by the context when the context is released, and adds the duration to the
value of this item. The statistics can be used to count the total duration of calls.

When the VMGW creates a context after receiving the ADD request from the MGC, the context
creating time (point A in the following figure) is recorded. When the context is released, the
total duration occupied by the context can be obtained. Refer to Figure 6-45.

The total duration refers to sum of duration of each context.


UMG8900

Figure 6-45 Total duration

MGC MGW
ADD.REQ(C1)

A

ADD.RESP(C1)
...
SUB.REQ(C1)

B
SUB.RESP(C1)

Measurement Types

Formula
Result = Total duration occupied by each context

6.2.4 Peak of the Number of Context

Description
This item refers to the maximum number of contexts in a measurement period.

Unit
None

Measurement Point
The MGW generates or releases a context under the control of the MSC server. The CMU updates
the number of contexts when generating or releasing a context. The MGW counts the maximum
number of current contexts in the measurement period. The statistics can be used to estimate the
status of the current calls.

Figure 6-46 Peak of the number of context

Context NUM

MAX Context Num

T


UMG8900

Measurement Types

Formula
Result = Maximum number of contexts in a measurement period

6.2.5 Average of the Number of Context

Description
This item refers to the average number of contexts in a measurement period.

Unit
None

Measurement Point
The VMGW generates or releases a context under the control of the MSC server. The CMU
updates the number of contexts when generating or releasing a context. The MGW counts the
average number of current contexts in the measurement period. The statistics can be used to
estimate the status of the current calls.

Figure 6-47 Average of the number of context
Performance
MGW Management
System

Create a task

Average number of contexts
End of period 1

Average number of contexts
End of period 2

Measurement Types

Formula
Result = Total number of contexts in a measurement period/Measure period


UMG8900

6.2.6 Number of Context of TDM-TDM

Description
This item refers to the number of contexts that the VMGW successfully establishes after adding
two TDM terminations to the contexts under the control of the MSC server.

Unit
None

Measurement Point
The VMGW generates new contexts under the control of the MSC server. The number of TDM-
TDM contexts is added by one when the CMU successfully creates a TDM-TDM context. The
statistics can be used to estimate the status of TDM-TDM calls.

Figure 6-48 Number of context of TDM-TDM

MGC MGW
ADD.REQ(TDM)

ADD.RESP
ADD.REQ(TDM)
...
ADD.RESP
... A
SUB.REQ

SUB.RESP

Measurement Types

Formula
Result = Total number of TDM-TDM contexts

6.2.7 Number of Context of IP-TDM

Description
an IP termination and a TDM termination to the contexts under the control of the MSC server.

Unit
None


UMG8900

Measurement Point
The VMGW generates new contexts under the control of the MSC server. The number of IP-
TDM contexts is added by one when the CMU successfully creates and IP-TDM context. The
statistics can be used to estimate the status of IP-TDM calls.

Figure 6-49 Number of context of IP-TDM

MGC MGW
ADD.REQ(TDM)

ADD.RESP
ADD.REQ(IP)
...
ADD.RESP
... A
SUB.REQ

SUB.RESP

Measurement Types

Formula
Result = Total number of IP-TDM contexts

6.2.8 Number of Context of ATM-TDM
Description
an ATM termination and a TDM termination to the contexts under the control of the MSC server.

Unit
None

Measurement Point
The VMGW generates new contexts under the control of an MSC server. The number of ATM-
TDM contexts is added by one when the CMU successfully creates an ATM-TDM context. The
statistics can be used to estimate the status of ATM-TDM calls.


UMG8900

Figure 6-50 Number of context of ATM-TDM

MGC MGW
ADD.REQ(TDM)

ADD.RESP
ADD.REQ(ATM)
...
ADD.RESP
... A
SUB.REQ

SUB.RESP

Measurement Types

Formula
Result = Total number of ATM-TDM contexts

6.2.9 Number of Context of IP-IP

Description
two IP terminations to the contexts under the control of the MSC server.

Unit
None

Measurement Point
The VMGW generates new contexts under the control of the MSC server. The number of IP-IP
contexts is added by one when the CMU successfully creates an IP-IP context. The statistics can
be used to estimate the status of IP-IP calls.

Figure 6-51 Number of context of IP-IP

MGC MGW
ADD.REQ(IP)

ADD.RESP
ADD.REQ(IP)
...
ADD.RESP
... A
SUB.REQ

SUB.RESP


UMG8900

Measurement Types

Formula
Result = Total number of IP-IP contexts

6.2.10 Number of Context of ATM-IP
Description
an ATM termination and an IP termination to the contexts under the control of the MSC server.

Unit
None

Measurement Point
The VMGW generates new contexts under the control of the MSC server. The number of ATM-
IP contexts is added by one when the CMU successfully creates an ATM-IP context. The
statistics can be used to estimate the status of ATM-IP calls.

Figure 6-52 Number of context of ATM-IP

MGC MGW
ADD.REQ(IP)

ADD.RESP
ADD.REQ(ATM)
...
ADD.RESP
... A
SUB.REQ

SUB.RESP

Measurement Types

Formula
Result = Total number of ATM-IP contexts

6.2.11 Number of Context of ATM-ATM
Description
two ATM terminations to the contexts under the control of the MSC server.


UMG8900

Unit
None

Measurement Point
The VMGW generates new contexts under the control of the MSC server. The number of ATM-
ATM contexts is added by one when the CMU successfully creates an ATM-ATM context. The
statistics can be used to estimate the status of ATM-ATM calls.

Figure 6-53 Number of context of ATM-ATM

MGC MGW
ADD.REQ(ATM)

ADD.RESP
ADD.REQ(ATM)
...
ADD.RESP
... A
SUB.REQ

SUB.RESP

Measurement Types

Formula
Result = Total number of ATM-ATM contexts

6.2.12 Total MPTY Context Succeeded

Description
This item refers to the total number of multiparty service (MPTY) contexts that the VMGW
successfully establishes under the control of the MSC server. The MPTY service includes the
MPTY call service and MPTY conference service. The MPTY context has audio mixing
resources.

Unit
None

Measurement Point
The VMGW generates new contexts under the control of the MSC server. The number of MPTY
contexts is added by one when the CMU successfully creates an MPTY context. The statistics
can be used to estimate the status of MPTY calls.


UMG8900

Figure 6-54 Total MPTY context succeeded

MGC MGW
ADD.REQ

ADD.RESP
ADD.REQ

ADD.RESP
ADD.REQ

ADD.RESP
... A
SUB.REQ

SUB.RESP

Measurement Types

Formula
Result = Total number of MPTY contexts

6.2.13 Peak of the Number of MPTY Context
Description
This item refers to the maximum number of multiparty service (MPTY) contexts in a
measurement period.

Unit
None

Measurement Point
The VMGW generates or releases the context under the control of the MSC server. The CMU
updates the number of MPTY context when generating and releasing an MPTY context. The
MGW counts the average number of current MPTY contexts in the measurement period. The
statistics can be used to estimate the status of the current MPTY calls.


UMG8900

Figure 6-55 Peak of the number of MPTY context

Mpty Context NUM

MAX Context Num

T

Measurement Types

Formula
Result = Maximum number of MPTY contexts in a measurement period

6.2.14 Average of the Number of MPTY Context
Description
This item refers to the average number of multiparty service (MPTY) contexts in a measurement
period.

Unit
None

Measurement Point
The VMGW generates or releases the context under the control of the MSC server. The CMU
updates the number of MPTY contexts when generating and releasing an MPTY context. The
MGW counts the average number of MPTY contexts in the measurement period. The statistics
can be used to estimate the status of the current MPTY calls.


UMG8900

Figure 6-56 Average of the number of MPTY context
Performance
MGW Management
System

Create a task

Average number of MPTY contexts
End of period 1

Average number of MPTY contexts
End of period 2

Measurement Types

Formula
Result = Total number of MPTY contexts in a measurement period/Measure period (s)

6.2.15 Number of Contexts with Call Loss
Description
This item refers to the number of contexts where the call establishment fails due to certain
reasons, among the contexts generated by the VMGW under the control of the MGC.

Unit
None

Measurement Point
The VMGW generates contexts under the control of the MSC server. For contexts where the
call establishment fails due to certain reasons, the CMU releases these contexts and adds the
number of contexts with call loss. The statistic can be used to estimate the call loss status.


UMG8900

Figure 6-57 Number of contexts with call loss

MGC MGW
ADD.REQ

ADD.RESP

...
Call loss is
generated.
A
SUB.REQ

SUB.RESP

Measurement Types

Formula
Result = Total number of contexts with call loss

6.2.16 Number of Other Successfully Released Contexts
Description
This item refers to the total number of contexts, excluding the ATM-ATM, ATM-TDM, ATM-
IP, TDM-TDM, TDM–IP, IP-IP, VIG and MPTY contexts, successfully established by the
VMGW under the control of the MGC. This item refers to contexts with only one termination
and used for auditing.

Unit
None

Measurement Point
The VMGW generates contexts, excluding the ATM-ATM, ATM-TDM, ATM-IP, TDM-TDM,
TDM–IP, IP-IP, VIG and MPTY contexts, under the control of the MSC server. The CMU adds
the number of successfully released contexts when releasing the contexts. The statistics can be
used to count calls of which the contexts are not commonly used.


UMG8900

Figure 6-58 Number of other successfully released contexts

MGC MGW
ADD.REQ

ADD.RESP
...

SUB.REQ

SUB.RESP A

Measurement Types

Formula
Result = Total number of other successfully released contexts

6.3 Number of Terminations Occupied by Context
This task is used to measure termination occupation in the MGW under the control of the MGC.
The terminations include IP terminations, ATM terminations, and TDM terminations. The
measure object is the VMGW.

6.3.1 Occupied Peak of IP Termination
6.3.2 Occupied Average of IP Termination
6.3.3 Occupied Peak of ATM Termination
6.3.4 Occupied Average of ATM Termination
6.3.5 Occupied Peak of TDM Termination
6.3.6 Occupied Average of TDM Termination

6.3.1 Occupied Peak of IP Termination
Description
This item refers to the maximum number of occupied IP terminations generated by the VMGW
under the control of the MSC server in a measurement period.

Unit
None


UMG8900

Measurement Point
The VMGW adds and deletes terminations under the control of the MSC server. The CMU
updates the number of occupied IP terminations when IP terminations are added or deleted. The
MGW counts the maximum number of IP terminations in the measurement period. The statistics
can be used to estimate the usage of IP terminations.

Figure 6-59 Occupied peak of IP termination
IP TERM NUM

MAX IP Term Num

T

Measurement Types

Formula
Result = Maximum number of occupied IP terminations in a measurement period

6.3.2 Occupied Average of IP Termination
Description
This item refers to the average number of occupied IP terminations generated by the VMGW
under the control of the MSC server in a measurement period.

Unit
None

Measurement Point
updates the number of occupied IP terminations when the IP terminations are added or deleted.
The MGW counts the average number of IP terminations in the measurement period. The
statistics can be used to estimate the usage of IP terminations.


UMG8900

Figure 6-60 Occupied average of IP termination
Performance
MGW Management
System

Create a task

Average number of occupied IP
terminations
End of period 1

Average number of occupied IP
terminations
End of period 2

Measurement Types

Formula
Result = Total number of occupied IP terminations in a measurement period/Measure period (s)

6.3.3 Occupied Peak of ATM Termination
Description
This item refers to the maximum number of occupied ATM terminations generated by the
VMGW under the control of the MSC server in a measurement period.

Unit
None

Measurement Point
updates the number of occupied ATM terminations when adding and releasing ATM
terminations. The MGW counts the maximum number of occupied ATM terminations in the
measurement period. The statistics can be used to estimate the usage of ATM terminations.


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