ETSI TS 102 024-3 V4.1.1 (2003-01)

SLOVENSKI STANDARD
01-april-2004
Harmonizacija telekomunikacij in internetnega protokola prek omrežij (TIPHON), 4.
izdaja - Kakovost storitve od konca do konca v sistemih TIPHON - 3. del:
Signalizacija in krmiljenje kakovosti storitve (QoS) od konca do konca
Telecommunications and Internet Protocol Harmonization Over Networks (TIPHON)
Release 4; End-to-end Quality of Service in TIPHON Systems; Part 3: Signalling and
Control of end-to-end Quality of Service
Ta slovenski standard je istoveten z: ETSI TS 102 024-3 V4.1.1 (2003-01)
ICS:
33.040.30 Komutacijski in signalizacijski Switching and signalling
sistem systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

Technical Specification
Telecommunications and Internet Protocol
Harmonization Over Networks (TIPHON) Release 4;
End-to-end Quality of Service in TIPHON Systems;
Part 3: Signalling and Control of end-to-end Quality of Service

2 ETSI TS 102 024-3 V4.1.1 (2003-01)

Reference
DTS/TIPHON-05003R4
Keywords
IP, protocol, QoS, signalling, voice, VoIP
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ETSI
3 ETSI TS 102 024-3 V4.1.1 (2003-01)
Contents
Intellectual Property Rights.6
Foreword.6
1 Scope.7
2 References.7
3 Definitions and abbreviations.8
3.1 Definitions.8
3.2 Abbreviations.8
4 End-to-end QoS Signalling functional requirements .8
4.1 Description.8
4.1.1 General description.8
4.2 Procedures.9
4.2.1 Provision and withdrawal.9
4.2.2 Normal procedures.9
4.2.2.1 Activation, deactivation and interrogation .9
4.2.2.2 Invocation and operation.9
4.2.3 Exceptional procedures.10
4.2.3.1 Invocation and operation.10
4.3 Interactions with other TIPHON service capabilities.10
4.3.1 Registration service capabilities.10
4.3.1.1 Terminal transport service registration.10
4.3.1.2 User service registration.10
4.3.2 Call connectivity service capabilities.10
4.3.2.1 Simple call establishment.10
4.3.2.2 Calling user identity generation .10
4.3.2.3 Calling user identity conveyance .10
4.3.2.4 Calling user identity delivery .10
4.3.2.5 Call rejection.11
4.3.2.6 Number portability.11
4.3.2.6.1 Number portability - All call query .11
4.3.2.6.2 Number portability - Query on release .11
4.3.2.6.3 Number portability - Pivot routing (Drop back).11
4.3.2.7 Emergency calls.11
4.3.2.7.1 Emergency Calling Service (ECS) .11
4.3.2.7.2 Authorized emergency priority calls .11
4.3.2.8 Bearer connectivity.11
4.3.2.8.1 Bearer creation.11
4.3.2.8.2 Bearer negotiation.11
4.3.2.8.3 Bearer re-negotiation.11
4.3.2.8.4 Media path optimization.11
4.3.2.9 Event recording.11
4.3.2.10 Third party authorization.11
4.3.2.11 Overlap sending.12
4.4 Interworking considerations.12
4.5 Overall behaviour.12
5 Functional entity model and information flows .14
5.1 Functional entity model.14
5.1.1 Description of model.14
5.1.2 Description of functional entities.15
5.1.2.1 Calling User.15
5.1.2.2 Calling User's service agent, QFE1.15
5.1.2.3 The originating QoS coordination function, QFE2 .15
5.1.2.4 The terminating QoS coordination function, QFE3 .15
5.1.2.5 The called user's incoming call service agent, QFE4 .15
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5.1.2.6 The QoS policy control function associated with the calling user's service provider, QFE5.15
5.1.2.7 The transport coordination function serving the calling user, QFE6.15
5.1.2.8 The transport coordination function serving the called user, QFE7.16
5.1.2.9 An intervening QoS coordination function, QFE8.16
5.1.2.10 An intervening transport coordination function, QFE9.16
5.1.2.11 Called User.16
5.2 Information flows.16
5.2.1 Definition of information flows.16
5.2.1.1 Relationship ra.16
5.2.1.1.1 OrigQoSEstab.16
5.2.1.2 Relationships rb, rc, rd and re .17
5.2.1.2.1 QoSEstab.17
5.2.1.3 Relationship rf.18
5.2.1.3.1 DestQoSEstab.18
5.2.1.4 Relationship rg.18
5.2.1.4.1 QoSPolicy.18
5.2.1.5 Relationships rh, ri and rj .19
5.2.1.5.1 TRMReserve.19
5.2.1.5.2 TRMConnect.19
5.2.1.5.3 TRMRelease.19
5.2.2 Relationship of information flows to TIPHON simple call .20
5.2.3 Timers.20
5.2.3.1 Reservation Hold Timers .20
5.2.4 Information flow sequences.20
5.2.4.1 Normal operation.21
5.2.4.2 Exceptional behaviour.23
5.3 QoS Functional entity actions .28
5.3.1 Actions of QFE1 .28
5.3.2 Actions of QFE2 .28
5.3.3 Actions of QFE3 .28
5.3.4 Actions of QFE4 .29
5.3.5 Actions of QFE5 .29
5.3.6 Actions of QFE6 .29
5.3.7 Actions of QFE7 .29
5.3.8 Actions of QFE8 .29
5.3.9 Actions of QFE9 .30
5.4 QoS Functional entity behaviour.30
5.4.1 Information flows specified as ASN.1 operations .30
5.4.2 Behaviour of QFE1.33
5.4.3 Behaviour of QFE2, QFE3 and QFE8 .36
5.4.4 Behaviour of QFE6, QFE7 and QFE9 .43
5.4.5 Behaviour of QFE4.46
5.4.6 Behaviour of QFE5.49
5.5 Allocation of functional entities to domains.50
Annex A (informative): Graphical representation of QFE allocation scenarios .51
Annex B (informative): Mappings of QoS meta-protocol to H.323 series protocols .55
B.1 Introduction.55
B.2 OrigQoSEstab.55
B.2.1 Additional H.225.0 ARQ settings for OrigQoSEstab.56
B.3 QoSEstab.57
B.3.1 Additional H.225.0 ARQ settings .58
B.4 DestQoSEstab.58
B.5 QoSPolicy.59
B.6 TRMReserve, TRMConnect, TRMRelease.59
B.7 Summary of mapping QoS meta-protocol to H.323 series.60
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5 ETSI TS 102 024-3 V4.1.1 (2003-01)
Annex C (informative): Mappings of QoS meta-protocol to SIP and associated protocols.61
C.1 Introduction.61
C.2 OrigQoSEstab.61
C.2 QoSEstab.63
C.3 DestQoSEstab.64
C.4 QoSPolicy.64
C.5 TRMReserve, TRMConnect, TRMRelease.65
C.6 Summary of mapping of QoS meta-protocol to SIP, SDP, RTP/AVP and COPS .66
Annex D (informative): Bibliography.67
History .68

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6 ETSI TS 102 024-3 V4.1.1 (2003-01)
Intellectual Property Rights
IPRs essential or potentially essential to the present document may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (http://webapp.etsi.org/IPR/home.asp).
All published ETSI deliverables shall include information which directs the reader to the above source of information.
Foreword
This Technical Specification (TS) has been produced by ETSI Project Telecommunications and Internet Protocol
Harmonization Over Networks (TIPHON).
The present document is part 3 of a multi-part deliverable covering the end-to-end Quality of Service in TIPHON
Systems, as identified below:
TR 102 024-1: "General aspects of Quality of Service (QoS)";
TS 102 024-2: "Definition of Speech Quality of Service (QoS) Classes";
TS 102 024-3: "Signalling and Control of end-to-end Quality of Service (QoS) in a multi-media environment";
TS 102 024-4: "Quality of Service Management";
TS 102 024-5: "Quality of Service (QoS) measurement methodologies";
TR 102 024-6: "Actual measurements of network and terminal characteristics and Performance parameters in
TIPHON networks and their influence on voice quality";
TR 102 024-7: "Design Guide for elements of a TIPHON connection from an end-to-end speech transmission
performance point of view";
TS 102 024-9: "Call performance Classification (Voice)";
TS 102 024-10: "QoS Requirements for TIPHON Terminals".
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7 ETSI TS 102 024-3 V4.1.1 (2003-01)
1 Scope
The present document, "TIPHON signalling and control of end-to-end Quality of Service (QoS)", specifies procedures
for the control of end-to-end QoS within and between domains. TS 101 882 (see bibliography) specifies the TIPHON
meta-protocols and object definitions required by these control procedures.
Additional annexes to the present document define profiles for mapping a number of existing candidates protocols to
the specified TIPHON meta-protocols.
2 References
The following documents contain provisions which, through reference in this text, constitute provisions of the present
document.
• References are either specific (identified by date of publication and/or edition number or version number) or
non-specific.
• For a specific reference, subsequent revisions do not apply.
• For a non-specific reference, the latest version applies.
Referenced documents which are not found to be publicly available in the expected location might be found at
http://docbox.etsi.org/Reference.
[1] ETSI TS 101 321: "Telecommunications and Internet Protocol; Harmonization Over Networks
(TIPHON); Open Settlement Protocol (OSP) for Inter-Domain pricing, authorization, and usage
exchange".
[2] ETSI TS 101 329-3: "Telecommunications and Internet Protocol Harmonization Over Networks
(TIPHON) Release 3; End-to-end Quality of Service in TIPHON systems; Part 3: Signalling and
control of end-to-end Quality of Service (QoS)".
[3] ETSI TS 101 878: "Telecommunications and Internet Protocol Harmonization Over Networks
(TIPHON) Release 3; Service Capability Definition; Service Capabilities for a simple call".
[4] ETSI TS 102 024-2: "Telecommunications and Internet Protocol Harmonization Over Networks
(TIPHON) Release 4; End-to-end Quality of Service in TIPHON Systems; Part 2: Definition of
Speech Quality of Service (QoS) Classes".
[5] ITU-T Recommendation E.164 (1997): "The international public telecommunication numbering
plan".
[6] ITU-T Recommendation Z.100 (1996): "Specification and description language (SDL) with
corrigendum 1".
[7] ITU-T Recommendation X.680: "Information technology; Open Systems Interconnection;
Abstract Syntax Notation One (ASN.1): Specification of basic notation".
[8] ITU-T Recommendation H.323 (2000): "Audiovisual and multimedia systems; Infrastructure of
audiovisual services; Services and terminal equipment for audiovisual services; Packet-based
multimedia communications systems".
[9] ITU-T Recommendation H.225.0 (2000): "Audiovisual and multimedia systems; Infrastructure of
audiovisual services; Transmission multiplexing and synchronization; Call signalling protocols
and media stream packetization for packet-based multimedia communication systems".
[10] ITU-T Recommendation H.245 (2001): "Audiovisual and multimedia systems; Infrastructure of
audiovisual services - Communication procedures; Control protocol for multimedia
communication".
[11] IETF RFC 1890: "RTP Profile for Audio and Video Conferences with Minimal Control".
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8 ETSI TS 102 024-3 V4.1.1 (2003-01)
[12] IETF RFC 2327: "SDP: Session Description Protocol".
[13] IETF RFC 2748: "The COPS (Common Open Policy Service) Protocol".
[14] IETF RFC 2806: "URLs for Telephone Calls".
[15] IETF RFC 3261: "SIP: Session Initiation Protocol".
3 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document, the following terms and definitions apply:
name: unique identifier by which a user, access or terminal is known within a TIPHON system
TIPHON system: system that complies with the mandatory requirements identified in the TIPHON specifications
3.2 Abbreviations
For the purposes of the present document, the following abbreviations apply:
ASN.1 Abstract Syntax Notation 1
COPS Common Open Policy Service
OSP Open Settlement Protocol
QFE QoS Functional Entity
QoS Quality of Service
RSVP resource ReSerVation Protocol
RTP/AVP Real-Time Protocol Audio-Video Profile
SCN Switched Circuit Network
SDL Specification and Description Language
SDP Session Description Protocol
SIP Session Initiation Protocol
4 End-to-end QoS Signalling functional requirements
4.1 Description
4.1.1 General description
End-to-end QoS Signalling is used within a TIPHON network to ensure that a caller is provided with an end-to-end
connection having at least the QoS class subscribed to or a lower QoS class if this is acceptable to the user. A QoS level
may either be requested explicitly by the user on a call-by-call basis or may be predefined as part of the user's
subscription. Additionally, the caller may be able to take specific actions if the QoS moves outside the accepted level
during an established call.
The user may use any of the following methods to request a specific end-to-end QoS at call establishment:
1) By subscription:
The agreement between the user and the user's service provider identifies the QoS level to be requested for any
call. The QoS level may be fixed or variable based upon such parameters as time-of-day and call destination.
This method requires no signalling between the user and the service provider at call setup time.
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9 ETSI TS 102 024-3 V4.1.1 (2003-01)
2) By the use of a standardized TIPHON QoS Class:
The user indicates at each call establishment which of the TIPHON QoS Classes (standardized in
TS 102 024-2 [4]) is to be requested for the call. The TIPHON QoS Classes are identified as:
- Class 1 Best effort;
- Class 2A Acceptable;
- Class 2M Medium;
- Class 2H High;
- Class 3 Best (broadband);
3) By the use of a non-standardized QoS Class:
The user indicates at each call establishment which non-standardized QoS class is to be requested for the call.
The QoS class may represent any combination of QoS parameters previously agreed between the user and the
service provider.
4.2 Procedures
4.2.1 Provision and withdrawal
End-to-end QoS Signalling shall be provided on a per-name, per application basis to all subscribers to the simple call
within a TIPHON system.
When establishing a call, a user shall be able to select at least one of the options identified in table 1.
Table 1: QoS option
Option Value
QoS class - Predefined by user and service provider (TIPHON or non-TIPHON class)
- TIPHON Best - QoS Class 3 (see note 1)
- TIPHON High - QoS Class 2H (see note 1)
- TIPHON Medium - QoS Class 2M (see note 1)
- TIPHON Acceptable - QoS Class 2A (see note 1)
- TIPHON Best effort - QoS Class 1 (see note 1)
- Non-TIPHON QoS Class (see note 2)
NOTE 1: This value shall be as defined in TS 102 024-2 [4].
NOTE 2: This may be any value agreed between the user and the service provider to indicate a specific QoS

4.2.2 Normal procedures
4.2.2.1 Activation, deactivation and interrogation
QoS Signalling shall be permanently activated.
4.2.2.2 Invocation and operation
When establishing a simple call, the calling user (or an agent within the user's network) may request a TIPHON
standardized QoS class or a non-standardized QoS class, to be applied to the call in order to achieve a required
end-to-end QoS.
If the end-to-end QoS requested by the calling user is available, communication using that QoS shall be established
following the simple call procedures specified in TS 101 878 [3].
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10 ETSI TS 102 024-3 V4.1.1 (2003-01)
4.2.3 Exceptional procedures
4.2.3.1 Invocation and operation
If it is not possible to offer the requested end-to-end QoS at call establishment, the calling user shall be informed and
may take one of the following actions:
- terminate the call attempt;
- request a lower QoS;
- proceed with the call at the QoS available between the caller and the called user.
If, during an established call, the end-to-end QoS perceived by the calling user falls below an acceptable level the
following practical options are available:
- terminate the call;
- continue with the call at the inferior QoS level.
4.3 Interactions with other TIPHON service capabilities
This clause specifies interactions with other TIPHON services for which standards were available at the time of
publication of the present document.
4.3.1 Registration service capabilities
4.3.1.1 Terminal transport service registration
No interaction.
4.3.1.2 User service registration
No interaction.
NOTE: The QOS to be used for subsequent calls by the registered user may form part of the information supplied
at registration.
4.3.2 Call connectivity service capabilities
4.3.2.1 Simple call establishment
No interactions.
4.3.2.2 Calling user identity generation
No interactions.
4.3.2.3 Calling user identity conveyance
No interactions.
4.3.2.4 Calling user identity delivery
No interactions.
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4.3.2.5 Call rejection
No interactions.
4.3.2.6 Number portability
4.3.2.6.1 Number portability - All call query
No interactions.
4.3.2.6.2 Number portability - Query on release
No interactions.
4.3.2.6.3 Number portability - Pivot routing (Drop back)
QoS Signalling shall be terminated prior to the invocation of the pivot routing service capability and then re-invoked
after the drop back has occurred.
4.3.2.7 Emergency calls
4.3.2.7.1 Emergency Calling Service (ECS)
No interactions.
4.3.2.7.2 Authorized emergency priority calls
Insufficient QoS availability shall not cause the rejection of an authorized emergency priority call.
4.3.2.8 Bearer connectivity
4.3.2.8.1 Bearer creation
No interactions.
4.3.2.8.2 Bearer negotiation
The user's requested QoS should be one of the parameters used in bearer negotiation.
4.3.2.8.3 Bearer re-negotiation
The user's requested QoS should be one of the parameters used in bearer re-negotiation.
4.3.2.8.4 Media path optimization
The selection of an optimum path which is different from that selected at call establishment shall not cause an adverse
effect on the perceived QoS of the call.
4.3.2.9 Event recording
No interactions.
4.3.2.10 Third party authorization
When a call is established using third party authorization, the requested QoS shall be that of the original calling user,
not that of the third party.
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12 ETSI TS 102 024-3 V4.1.1 (2003-01)
4.3.2.11 Overlap sending
No interactions.
4.4 Interworking considerations
When interworking with a Switched Circuit Network (SCN) where the only variable affecting QoS is the choice of
bearer service, fixed QoS parameters shall be assumed based on the bearer service selected.
4.5 Overall behaviour
Figure 1 contains the dynamic description of end-to-end QoS Signalling using a Unified Modeling Language (UML)
activity diagram. The activity diagram represents the behaviour of a TIPHON system in providing end-to-end QoS
Signalling.
NOTE: The syntax and semantics of UML diagrams are defined by the Object Management Group (OMG).
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13 ETSI TS 102 024-3 V4.1.1 (2003-01)

ACTIVATED
Call Establishment
Request
TIPHON QoS Class Provided Non-TIPHON QoS Class Provided
(Explicit or predefined) (Explicit or predefined)
Determine QoS Parameters
Determine QoS Parameters
According to Contract
According to TS 102 024-2
Request
End-to-End QoS
End-to-end QoS Response
Requested End-to-end QoS
Unavailable
Reject Call
Permit Call
Establishment
Establishment
ACTIVATED
Figure 1: Overall behaviour of end-to-end QoS Signalling at call establishment
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14 ETSI TS 102 024-3 V4.1.1 (2003-01)
5 Functional entity model and information flows
5.1 Functional entity model
5.1.1 Description of model
The functional model shall comprise the following QoS Functional Entities (QFE):
Calling User The application at the calling user's terminal which instigates the service request.
QFE1 The service agent that processes the calling user's request for end-to-end QoS signalling.
QFE2 The originating QoS coordination function. This QFE is responsible for negotiating and
establishing a particular QoS on behalf of the calling user.
QFE3 The terminating QoS coordination function. This QFE is responsible for establishing a particular
QoS on behalf of the called user.
QFE4 The service agent that processes an incoming call to the called user.
QFE5 The QoS policy control function associated with the calling user's service provider.
QFE6 The transport coordination function serving the calling user.
QFE7 The transport coordination function serving the called user.
QFE8 An intervening QoS coordination function. This QFE is responsible for establishing a particular
QoS within an intervening domain.
QFE9 An intervening transport coordination function.
Called User The application in the called user's terminal at which the service request is terminated.
The following functional relationships shall exist between these QFEs:
ra between the Calling User and the Calling User's service agent (QFE1).
rb between the Calling User's service agent (QFE1) and the Calling User's QoS coordination function
(QFE2).
rc between QoS coordination functions in the originating side (QFE2) and an intervening QoS
coordination function (QFE8).
rd between an intervening QoS coordination function (QFE8) and the Called User's QoS coordination
function (QFE3).
re between the Called User's QoS coordination function (QFE3) and the Called User's service agent
(QFE4).
rf between the Called User's service agent (QFE4) and the Called User.
rg between the Calling User's service agent (QFE1) and the QoS Policy Control function associated
with the Calling User (QFE5).
rh between the originating QoS coordination function (QFE2) and the originating transport
coordination function (QFE6).
ri between an intervening QoS coordination function (QFE8) and the transport coordination function
associated with it (QFE9).
rj between the terminating QoS coordination function (QFE3) and the terminating transport
coordination function (QFE7).
Figure 2 shows the Functional Entities (QFE) and the relationships between them.
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15 ETSI TS 102 024-3 V4.1.1 (2003-01)

QFE5
rg
Calling
ra rb rc rd re rf Called
QFE1 QFE2 QFE8 QFE3 QFE4
User
User
rh ri
rj
QFE6 QFE9 QFE7
Figure 2: End-to-end QoS signalling functional entity model
5.1.2 Description of functional entities
5.1.2.1 Calling User
The Calling User functional entity acts on behalf of the human user to request the establishment of an end-to-end call
with a specific QoS.
5.1.2.2 Calling User's service agent, QFE1
On receipt of a QoS establishment request from the Calling User, QFE1 determines whether current policy permits the
requested QoS to be used with the call and either initiates a simple call establishment request towards the destination
address or rejects the call request back to the calling user.
5.1.2.3 The originating QoS coordination function, QFE2
This QFE requests the provision of a bearer capable of supporting the desired end-to-end QoS and passes on the simple
call request towards QFE3.
5.1.2.4 The terminating QoS coordination function, QFE3
QFE3 requests the provision of a bearer capable of supporting the desired end-to-end QoS and passes on the simple call
request to QFE4.
5.1.2.5 The called user's incoming call service agent, QFE4
This QFE informs the called user that the requested QoS is required with the associated incoming simple call.
5.1.2.6 The QoS policy control function associated with the calling user's service
provider, QFE5
This QFE consults its current service database to determine whether the calling user is permitted to make a call with the
requested end-to-end QoS to the indicated called user.
5.1.2.7 The transport coordination function serving the calling user, QFE6
This QFE attempts to establish a bearer connection between the indicated incoming user access point and an appropriate
outgoing network access point capable of providing the requested end-to-end QoS.
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5.1.2.8 The transport coordination function serving the called user, QFE7
This QFE attempts to establish a bearer connection between the indicated incoming network access point and an
appropriate outgoing user access point capable of providing the requested end-to-end QoS.
5.1.2.9 An intervening QoS coordination function, QFE8
If present, this QFE requests the provision of a bearer capable of supporting the desired end-to-end QoS and passes on
the simple call request towards QFE3.
5.1.2.10 An intervening transport coordination function, QFE9
If present, this QFE attempts to establish a bearer connection between the indicated incoming network access point and
an appropriate outgoing network access point capable of providing the requested end-to-end QoS.
5.1.2.11 Called User
The Called User functional entity acts on behalf of the human user to accept the establishment of an end-to-end call
with a specific QoS.
5.2 Information flows
5.2.1 Definition of information flows
NOTE: In the tables within this clause, the following convention is used in the "Value" columns. Un-bulleted lists
of values indicate that all items in the list are included in the associated information element; bulleted lists
of values indicate that only one item in the list is included in the information element.
5.2.1.1 Relationship ra
5.2.1.1.1 OrigQoSEstab
OrigQoSEstab is a confirmed information flow that shall be sent across relationship ra from the calling user to QFE1
to indicate a request for a new call establishment with a specific end-to-end QoS. Table 2 lists the elements within the
OrigQoSEstab information flow.
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17 ETSI TS 102 024-3 V4.1.1 (2003-01)
Table 2: Content of OrigQoSEstab
OrigQoSEstab
Information element Value Request Response
QoS Service Class - Predefined M
- TIPHON QoS class
- 3 Best
- 2H High
- 2M Medium
- 2A Acceptable
- 1 Best effort
- Non-standardized QoS class
Called user ID TIPHON user name M
Codec - List of possible codecs M O
- Codec type (see notes 1 and 2)
- Frames per packet
Result - End-to-End QoS Established M
- with requested QoS
- Rejection cause
- Requested QoS not available
- Called user unknown
- No compatible codec available
- Policy Rejection
NOTE 1: The list of codecs shall be limited to a single entry in the response.
NOTE 2: This element shall be included if the Result element is set to "end-to-end QoS Established".

5.2.1.2 Relationships rb, rc, rd and re
5.2.1.2.1 QoSEstab
QoSEstab is a confirmed information flow that shall be sent across relationships rb, rc, rd and re to indicate a request
for the provision of a guaranteed end-to-end QoS for the associated TIPHON simple call. Table 3 lists the elements
within the QoSEstab information flow.
Table 3: Contents of QoSEstab
QoSEstab
Information element Value Request Response
Calling user ID TIPHON user name M
Called user ID TIPHON user name M
Transport QoS parameters Maximum delay, M
Maximum packet delay variation,
Maximum mean packet loss
Transport parameters qualifier - Transport QoS parameters indicate total M
remaining budget
- Transport QoS parameters indicate budget
available per domain
Traffic descriptor Media peak rate, M
Maximum media frame size,
Codec List of possible codecs M O
- Codec type (see notes 1 and 2)
- Frames per packet
Destination service domain Network specific address O
Result - Requested QoS available M
- Rejection cause
- Requested QoS not available
- Called user unknown
- No compatible codec available
NOTE 1: The list of codecs shall be limited to a single entry in the response.
NOTE 2: This element shall be included if the result of the request is "Requested QoS available".

ETSI
18 ETSI TS 102 024-3 V4.1.1 (2003-01)
5.2.1.3 Relationship rf
5.2.1.3.1 DestQoSEstab
DestQoSEstab is a confirmed information flow that shall be sent across relationship rf from QFE4 to the called user
to indicate a request for a new call establishment with a specific end-to-end QoS. Table 4 lists the elements within the
DestQoSEstab information flow.
Table 4: Contents of DestQoSEstab
DestQoSEstab
Information element Value Request Response
Calling user ID TIPHON user name M
Transport QoS parameters Maximum delay, M
Maximum packet delay variation,
Maximum mean packet loss
Codec List of possible codecs M O
- Codec type (see notes 1 and 2)
- Frames p
...