E.4.3 Mn Signalling procedures
29.1633GPPInterworking between the IP Multimedia (IM) Core Network (CN) subsystem and Circuit Switched (CS) networksTS
E.4.3.1 Overview
This clause describes the logical signalling procedures (i.e. message identifiers are not part of the protocol) between the MGCF and IM-MGW. The procedures within this clause are intended to be implemented using the standard H.248 procedure as defined in ITU recommendation H.248.1 [2] with appropriate parameter combinations.
E.4.3.2 Add Multiplex Termination
This procedure is used to add a termination to multiplex/demultiplex H.223. This procedure containing the MuxDescriptor with H.223 value enables the IM-MGW to start the H.324 Multiplexing Level Negotiation.
Table E.4.3.2.1: Add Multiplex Termination Procedure
|
Procedure |
Initiated |
Information element name |
Information element required |
Information element description |
|---|---|---|---|---|
|
Add Multiplex Termination |
MGCF |
Context |
M |
This information element indicates the existing context. |
|
Termination |
M |
This information element requests a new termination |
||
|
MuxDescriptor |
M |
This information element indicates that data multiplexed according to H223 shall be received, and from which termination. |
||
|
Notify Termination Heartbeat |
M |
This information element requests termination heartbeat indications |
||
|
Notify Released Bearer |
O |
This information element requests a notification of a released bearer. |
||
|
Incoming H.245 message Notification Request |
M |
This Event shall indicate that a Notification about H.245 messages received by the IM-MGW is requested by the MGCF |
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|
MONA Preferences |
O |
This information element requests the MGW to start a MONA negotiation and provisions MONA preferences to be indicated by the IM-MGW, encoded as described in clause K.6 of ITU-T H.324 [81] |
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|
MONA Preference Reception |
O |
This information element requests a notification of the reception of the first MONA preference message. |
||
|
MONA Preference Completed |
O |
This information element requests a notification of the reception of the first MONA preference message with indication that the MONA preference negotiation is completed. |
||
|
Legacy Detected |
O |
This information element requests a notification of a legacy interworking condition. The Event Descriptor also embeds a signal descriptor including an H.245 message out signal which shall be send when legacy interworking is detected |
||
|
MPC Reception |
O |
This information element requests a notification of the reception of the first MONA preference message with attached MPC. |
||
|
SPC Reception |
O |
This information element requests a notification of the reception of a MONA preference message with attached SPC. |
||
|
Incoming Multiplex Table |
O |
This information element indicates the value of the H245 MultiplexEntrySend message and allows the MGW to identify incoming H.223 MUX PDUs of the channel types given in the table. |
||
|
MPC Mux Code |
O |
This information element requests the MGW to send available media in MPCs and indicates the channel type to use for sending media. |
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|
Add Multiplex Termination Ack |
IM-MGW |
Context |
M |
This information element indicates the context where the command was executed. |
|
Termination |
M |
This information element indicates the new termination where the command was executed. |
E.4.3.3 Configure Multiplex Termination
This procedure is used to configure a termination to multiplex/demultiplex H.223. It is also used to exclude some of the outgoing MPC channel types due to the MONA Preference received from the peer.
Table E.4.3.3.1: Configure Multiplex Termination Procedure
|
Procedure |
Initiated |
Information element name |
Information element required |
Information element description |
|---|---|---|---|---|
|
Configure Multiplex Termination |
MGCF |
Context |
M |
This information element indicates the existing context. |
|
Termination |
M |
This information element indicates the termination |
||
|
Remote H223 Capability |
O |
This information element indicates the remote H223 capabilities, as received by the MGCF. The element shall not be included if the MPC Mux Code IE is included. |
||
|
Incoming Multiplex Table |
O |
This information element indicates the value of the H245 MultiplexEntrySend message, as received by the MGCF from the remote H.245 peer. Either this element or the MPC Mux Code IE shall be included. |
||
|
Outgoing Multiplex Table |
O |
This information element indicates the value of the H245 MultiplexEntrySend message, as sent by the MGCF towards the remote H.245 peer. Either this element or the MPC Mux Code IE shall be included. |
||
|
MPC Mux Code |
O |
This information element requests the MGW to continue sending available media in MPC and indicates the channel type to use for sending media. It is used in this procedure only to restrict the list of channel types indicated previously in the Add Multiplex Termination procedure. Either this element or the Incoming and Outgoing Multiplex Table elements shall be included. |
||
|
Configure Multiplex Termination |
IM-MGW |
Context |
M |
This information element indicates the context where the command was executed. |
|
Termination |
M |
This information element indicates the termination where the command was executed. |
E.4.3.4 Signal H245 Message
This procedure is used to send a H245 message to the IM-MGW that the IM-MGW shall forward towards the CS side within H.223.
Table E.4.3.4.1: Signal H245 Message Procedure
|
Procedure |
Initiated |
Information element name |
Information element required |
Information element description |
|
Signal H245 Message |
MGCF |
Context |
M |
This information element indicates the existing context. |
|
Termination |
M |
This information element indicates the termination |
||
|
Signal |
M |
This information element indicates the signal to request forwarding of a H245 message towards the CS side within H.223 |
||
|
H.245 message |
M |
This information element indicates the H.245 message to be forwarded |
||
|
Signal H245 Message Ack |
IM-MGW |
Context |
M |
This information element indicates the context where the command was executed. |
|
Termination |
M |
This information element indicates the termination where the command was executed. |
E.4.3.5 Notify H245 Message
This procedure is used by the IM-MGW to notify the MGCF that the IM-MGW has received a H245 message from the CS side within H.223.
Table E.4.3.5.1: Notify H245 Message Procedure
|
Procedure |
Initiated |
Information element name |
Information element required |
Information element description |
|
Notify H245 Message |
IM-MGW |
Context |
M |
This information element indicates the existing context. |
|
Termination |
M |
This information element indicates the termination |
||
|
Event |
M |
This information element indicates the event to indicate that a H245 message has been received from the CS side within H.223 |
||
|
H.245 message |
M |
information element indicates the received H.245 message |
||
|
Notify H245 Message Ack |
MGCF |
Context |
M |
This information element indicates the context where the command was executed. |
|
Termination |
M |
This information element indicates the termination where the command was executed. |
E.4.3.6 Notify MONA Preference Reception
This procedure is used by the IM-MGW to notify the MGCF that the IM-MGW has received the first MONA preference Message from the CS side.
Table E.4.3.6.1: Notify MONA Preference Reception Procedure
|
Procedure |
Initiated |
Information element name |
Information element required |
Information element description |
|
Notify H245 Message |
IM-MGW |
Context |
M |
This information element indicates the existing context. |
|
Termination |
M |
This information element indicates the termination |
||
|
Event |
M |
This information element indicates the event to indicate that a MONA Preference Message has been received |
||
|
MONA Preferences |
M |
This information element indicates the received MONA preference message |
||
|
Notify H245 Message Ack |
MGCF |
Context |
M |
This information element indicates the context where the command was executed. |
|
Termination |
M |
This information element indicates the termination where the command was executed. |
E.4.3.7 Notify MONA Preference Completed
This procedure is used by the IM-MGW to notify the MGCF that the IM-MGW has received the first MONA preference Message with indication that the MONA preference negotiation is completed.
Table E.4.3.7.1: Notify MONA Preference Completed Procedure
|
Procedure |
Initiated |
Information element name |
Information element required |
Information element description |
|
Notify H245 Message |
IM-MGW |
Context |
M |
This information element indicates the existing context. |
|
Termination |
M |
This information element indicates the termination |
||
|
Event |
M |
This information element indicates the event to indicate that the first MONA preference Message with indication that the MONA preference negotiation is completed received |
||
|
Notify H245 Message Ack |
MGCF |
Context |
M |
This information element indicates the context where the command was executed. |
|
Termination |
M |
This information element indicates the termination where the command was executed. |
E.4.3.8 Signal SPC
This procedure is used to send a H245 message to the IM-MGW that the IM-MGW shall forward towards the CS side using the SPC, i.e. as attachment to MONA preference messages.
Table E.4.3.8.1: Signal SPC Procedure
|
Procedure |
Initiated |
Information element name |
Information element required |
Information element description |
|
Signal H245 Message |
MGCF |
Context |
M |
This information element indicates the existing context. |
|
Termination |
M |
This information element indicates the termination |
||
|
Signal |
M |
This information element indicates the signal to request forwarding of a H245 message towards the CS side using the SPC, i.e. as attachment to MONA preference messages |
||
|
H.245 message |
M |
This information element indicates the H.245 message to be forwarded |
||
|
Signal H245 Message Ack |
IM-MGW |
Context |
M |
This information element indicates the context where the command was executed. |
|
Termination |
M |
This information element indicates the termination where the command was executed. |
E.4.3.9 Notify SPC
This procedure is used by the IM-MGW to notify the MGCF that the IM-MGW has received a H245 message from the CS side in SPC PDUs attached to MONA preference messages.
Table E.4.3.9.1: Notify SPC Procedure
|
Procedure |
Initiated |
Information element name |
Information element required |
Information element description |
|
Notify H245 Message |
IM-MGW |
Context |
M |
This information element indicates the existing context. |
|
Termination |
M |
This information element indicates the termination |
||
|
Event |
M |
This information element indicates the event to indicate that a H245 message has been received from the CS side in SPC PDUs attached to MONA preference messages |
||
|
H.245 message |
M |
information element indicates the received H.245 message |
||
|
Notify H245 Message Ack |
MGCF |
Context |
M |
This information element indicates the context where the command was executed. |
|
Termination |
M |
This information element indicates the termination where the command was executed. |
E.4.3.10 Notify MPC
This procedure is used by the IM-MGW to notify the MGCF that the IM-MGW has received the first MONA preference message with attached MPC from the CS side.
Table E.4.3.10.1: Notify MPC Procedure
|
Procedure |
Initiated |
Information element name |
Information element required |
Information element description |
|
Notify H245 Message |
IM-MGW |
Context |
M |
This information element indicates the existing context. |
|
Termination |
M |
This information element indicates the termination |
||
|
Event |
M |
This information element indicates the event to indicate that the first MONA preference message with attached MPC has been received. |
||
|
MuxCode |
M |
information element that indicates the received Channel Type |
||
|
Notify H245 Message Ack |
MGCF |
Context |
M |
This information element indicates the context where the command was executed. |
|
Termination |
M |
This information element indicates the termination where the command was executed. |
E.4.3.11 Notify Detection of Legacy Interworking
This procedure is used by the IM-MGW to notify the MGCF that the IM-MGW detects a legacy interworking condition that causes it to abort MONA procedures.
Table E.4.3.11.1: Notify Detection of Legacy Interworking Procedure
|
Procedure |
Initiated |
Information element name |
Information element required |
Information element description |
|
Notify H245 Message |
IM-MGW |
Context |
M |
This information element indicates the existing context. |
|
Termination |
M |
This information element indicates the termination |
||
|
Event |
M |
This information element indicates the event to indicate that a legacy interworking condition has been detected. |
||
|
Notify H245 Message Ack |
MGCF |
Context |
M |
This information element indicates the context where the command was executed. |
|
Termination |
M |
This information element indicates the termination where the command was executed. |
E.4.3.12 Request RTCP-Interworking
This procedure is used by the MGCF to request the IM-MGW to detect the RTCP feedback message on the quality of the media distribution requiring interworking.
Table E.4.3.12.1: Request RTCP-Interworking
|
Procedure |
Initiated |
Information element name |
Information element required |
Information element description |
|
Request RTCP-Interworking |
MGCF |
Context |
M |
This information element indicates the existing context. |
|
Termination |
M |
This information element indicates an existing |
||
|
RTCPfilter |
M |
This information element provides one or several bit pattern(s) for bits 3-15 of an RTCP packet. Information from RTCP packets that match those patterns shall be notified to the MGCF. |
||
|
RTCP-Interworking |
M |
This information element requests a notification about information derived from the incoming RTCP packet types denoted by RTCPfilter. |
||
|
Request RTCP-Interworking Ack |
IM-MGW |
Context |
M |
This information element indicates the context where the command was executed. |
|
Termination |
M |
This information element indicates the new termination where the command was executed. |
E.4.3.13 Notify RTCP-Interworking
This procedure is used by the IM-MGW to notify the MGCF the feedback information elements when the IM-MGW detects a RTCP feedback message on the quality of the media distribution requiring interworking.
Table E.4.3.13.1: Notify of RTCP-Interworking
|
Procedure |
Initiated |
Information element name |
Information element required |
Information element description |
|
Notify RTCP-Interworking |
IM-MGW |
Context |
M |
This information element indicates the existing context. |
|
Termination |
M |
This information element indicates the termination |
||
|
UpdatePicture |
C |
This information element shall be included upon reception of a RTCP PLI message. It indicates the request of sending of full intra-pictures. |
||
|
MaxBitRate |
C |
This information element shall be included upon reception of a RTCP TMMBR message. It shall contain the bandwidth as indicated in the RTCP TMMBR message excluding the overhead indicated in the RTCP TMMBR message. |
||
|
Notify RTCP-Interworking Ack |
MGCF |
Context |
M |
This information element indicates the context where the command was executed. |
|
Termination |
M |
This information element indicates the termination where the command was executed. |
E.4.3.14 Signal-H.245-Interworking
This procedure is used by the MGCF to indicate the IM-MGW the feedback information elements when a H.245 feedback message on the quality of the media distribution requiring interworking is received.
Table E.4.3.14.1: Signal H.245-Interworking
|
Procedure |
Initiated |
Information element name |
Information element required |
Information element description |
|
Signal H.245-Interworking |
MGCF |
Context |
M |
This information element indicates the existing context. |
|
Termination |
M |
This information element indicates the termination |
||
|
UpdatePicture |
C |
This information element indicates the request to send a RTCP PLI message. |
||
|
MaxBitRate |
C |
This information element indicates the request to send a RTCP TMBR message. It shall contain the bandwidth as indicated in the RTCP TMMBR message excluding the overhead indicated in the RTCP TMMBR message. |
||
|
Signal H.245-Interworking Ack |
IM-MGW |
Context |
M |
This information element indicates the context where the command was executed. |
|
Termination |
M |
This information element indicates the termination where the command was executed. |
E.4.3.15 Stop MPC
This procedure is used by the MGC to indicate to the MG that it is no longer allowed to send MPC media encapsulated in MONA Preference messages and that it shall stop MPC detection.
Table E.4.3.15.1: Stop MPC
|
Procedure |
Initiated |
Information element |
Information element required |
Information element description |
|
Stop MPC |
MGCF |
Context |
M |
This information element indicates the existing context. |
|
Termination |
M |
This information element indicates the termination |
||
|
Stop MPC Reception |
M |
This information element indicates that the reception of MPC encapsulated in MONA Preference Messages shall be stopped. |
||
|
Stop MPC Sending |
M |
This information element requests that the sending of the MPC shall be stopped. |
||
|
Stop MPC Ack |
IM-MGW |
Context |
M |
This information element indicates the context where the command was executed. |
|
Termination |
M |
This information element indicates the termination where the command was executed. |
E.4.3.16 Stop SPC
This procedure is used by the MGC to indicate to the MG that it is no longer allowed to send MPC media encapsulated in MONA Preference messages and that it shall stop SPC detection.
Table E.4.3.16.1: Stop MPC
|
Procedure |
Initiated |
Information element |
Information element required |
Information element description |
|
Stop SPC |
MGCF |
Context |
M |
This information element indicates the existing context. |
|
Termination |
M |
This information element indicates the termination |
||
|
Stop SPC Sending |
M |
This information element requests that the sending of SPC encapsulated in MONA Preference messages shall be stopped. |
||
|
Stop SPC Detection |
M |
This information element requests that the detection of received SPC encapsulated in MONA Preference Message shall be stopped. |
||
|
Stop SPC Ack |
IM-MGW |
Context |
M |
This information element indicates the context where the command was executed. |
|
Termination |
M |
This information element indicates the termination where the command was executed. |
E.4.3.17 Stop MONA Negotiation
This procedure is used by the MGC to request the MG to stop all MONA nogotiation related procedures.
Table E.4.3.17.1: Stop MONA Negotiation
|
Procedure |
Initiated |
Information element |
Information element required |
Information element description |
|
Stop MONA Negotiation |
MGCF |
Context |
M |
This information element indicates the existing context. |
|
Termination |
M |
This information element indicates the termination |
||
|
Stop MONA Preference Message Sending |
M |
This information element requests that the sending of MONA Preference messages be stopped. |
||
|
Stop MONA Detection |
M |
This information element requests that the detection of first MONA Preference Message and of the MONA negotiation completion be stopped. |
||
|
Stop SPC Sending |
C |
This information element requests that the sending of SPC encapsulated in MONA Preference messages be stopped. Required only if SPC sending was previously configured. |
||
|
Stop SPC Detection |
C |
This information element requests that the detection of received SPC encapsulated in MONA Preference Message be stopped. Required only if SPC reception was previously configured. |
||
|
Stop MPC Reception |
C |
This information element indicates that the reception of MPC encapsulated in MONA Preference Messages shall be stopped. Required only if MPC reception was previously configured. |
||
|
Stop MPC Sending |
C |
This information element requests that the sending of the MPC shall be stopped. Required only if MPC sending was previously configured. |
||
|
Stop MONA Negotiation Ack |
IM-MGW |
Context |
M |
This information element indicates the context where the command was executed. |
|
Termination |
M |
This information element indicates the termination where the command was executed. |
Annex F (normative):
PSTN XML Scheme