ETSI ES 283 034 V1.5.0 (2008-04)

Telecommunications and Internet converged Services and Protocols for Advanced Networking (TISPAN); Network Attachment Sub-System (NASS); e4 interface based on the DIAMETER protocol

RES/TISPAN-03124-NGN-R1

Zlite telekomunikacijske in internetne storitve ter protokoli za napredno omreženje (TISPAN) - Podsistem omrežne priključitve (NASS) - Vmesnik e4 na podlagi protokola DIAMETER

General Information

• Status: Published
• Publication Date: 10-Apr-2008
• Technical Committee: TISPAN 3 - TISPAN Protocols
• Current Stage: 12 - Completion
• Due Date: 11-Apr-2008
• Completion Date: 11-Apr-2008
• Ref Project: SIST ES 283 034 V1.5.0:2008 - Telecommunications and Internet converged Services and Protocols for Advanced Networking (TISPAN) - Network Attachment Sub-System (NASS) - e4 interface based on the DIAMETER protocol

Standards Content (Sample)

ETSI ES 283 034 V1.5.0 (2008-04)
ETSI Standard


Telecommunications and Internet converged Services and
Protocols for Advanced Networking (TISPAN);
Network Attachment Sub-System (NASS);
e4 interface based on the DIAMETER protocol

---------------------- Page: 1 ----------------------
2 ETSI ES 283 034 V1.5.0 (2008-04)



Reference
RES/TISPAN-03124-NGN-R1
Keywords
interface, network, system
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE

Tel.: [phone]  Fax: [phone]

Siret N° 348 623 562 00017 - NAF 742 C
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° 7803/88

Important notice
Individual copies of the present document can be downloaded from:
http://www.etsi.org
The present document may be made available in more than one electronic version or in print. In any case of existing or
perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF).
In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive
within ETSI Secretariat.
Users of the present document should be aware that the document may be subject to revision or change of status.
Information on the current status of this and other ETSI documents is available at
http://portal.etsi.org/tb/status/status.asp
If you find errors in the present document, please send your comment to one of the following services:
http://portal.etsi.org/chaircor/ETSI_support.asp
Copyright Notification
No part may be reproduced except as authorized by written permission.
The copyright and the foregoing restriction extend to reproduction in all media.

© European Telecommunications Standards Institute 2008.
All rights reserved.

TM TM TM TM
DECT , PLUGTESTS , UMTS , TIPHON , the TIPHON logo and the ETSI logo are Trade Marks of ETSI registered
for the benefit of its Members.
TM
3GPP is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners.
ETSI

---------------------- Page: 2 ----------------------
3 ETSI ES 283 034 V1.5.0 (2008-04)
Contents
Intellectual Property Rights.5
Foreword.5
1 Scope.6
2 References.6
2.1 Normative references.6
2.2 Informative references.7
3 Definitions and abbreviations.7
3.1 Definitions.7
3.2 Abbreviations.7
4 Overview.8
5 Procedure descriptions .9
5.1 General.9
5.1.1 Information elements.9
5.1.2 Subscriber profile.9
5.2 Procedures on the CLF - A-RACF interface .10
5.2.1 Access profile push.10
5.2.1.1 Overview.10
5.2.1.2 Procedure at the CLF side .11
5.2.1.3 Procedure at the A-RACF side.11
5.2.2 Access profile pull .12
5.2.2.1 Overview.12
5.2.2.2 Procedure at the A-RACF side.13
5.2.2.3 Procedure at the CLF side .13
5.2.3 IP connectivity release indication .14
5.2.3.1 Overview.14
5.2.3.2 Procedure at the CLF side .14
5.2.3.3 Procedure at the A-RACF side.15
6 Use of the Diameter base protocol .15
6.1 Securing Diameter messages.15
6.2 Accounting functionality.15
6.3 Use of sessions .15
6.4 Transport protocol.15
6.5 Routing considerations.16
6.6 Advertising application support .16
7 DIAMETER application.16
7.1 Commands.16
7.1.1 User-Data-Request command.17
7.1.2 User-Data-Answer command.17
7.1.3 Push-Notification-Request command.18
7.1.4 Push-Notification-Answer command.18
7.2 Result-Code AVP values.18
7.2.1 Success.19
7.2.2 Permanent failures.19
7.2.3 Transient failures.19
7.3 AVPs.20
7.3.1 Globally-Unique-Address AVP.21
7.3.2 Address-Realm AVP.21
7.3.3 Logical-Access-ID AVP.21
7.3.4 Initial-Gate-Setting AVP.22
7.3.5 QoS-Profile AVP.22
7.3.6 IP-Connectivity-Status AVP.22
7.3.7 Access-Network-Type AVP.22
ETSI

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4 ETSI ES 283 034 V1.5.0 (2008-04)
7.3.8 Aggregation-Network-Type AVP.23
7.3.9 Maximum-Allowed-Bandwidth-UL AVP.23
7.3.10 Maximum-Allowed-Bandwidth-DL AVP.23
7.3.11 Reservation-Priority.23
7.3.12 Transport-Class.23
7.3.13 Application-Class-ID.23
7.3.14 Physical-Access-ID.24
7.3.15 NAS-Port-Type AVP.24
7.3.16 NAS-Filter-Rule AVP.24
7.3.17 Framed-IP-Address AVP.24
7.3.18 Framed-IP-Prefix AVP.24
7.3.19 Origin-Host AVP.24
7.3.20 AF-Application-Identifier AVP.24
7.3.21 Media-Type AVP.24
7.4 Use of namespaces .24
7.4.1 AVP codes.24
7.4.2 Experimental-Result-Code AVP values.24
7.4.3 Command Code values .24
7.4.4 Application-ID value.25
Annex A (informative): Mapping of e4 operations and terminology to Diameter.26
History .27

ETSI

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5 ETSI ES 283 034 V1.5.0 (2008-04)
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).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
Foreword
This ETSI Standard (ES) has been produced by ETSI Technical Committee Telecommunications and Internet
converged Services and Protocols for Advanced Networking (TISPAN).
ETSI

---------------------- Page: 5 ----------------------
6 ETSI ES 283 034 V1.5.0 (2008-04)
1 Scope
The present document defines a protocol for use between the TISPAN NGN Network Attachment Sub-System (NASS)
and the Resource and Admission Control Subsystem (RACS), based on Diameter.
The present document is applicable to the e4 interface between the Connectivity Session Location and Repository
Function (CLF) and the RACS.
Whenever it is possible the present document specifies the requirements for this protocol by reference to specifications
produced by the IETF within the scope of Diameter. Where this is not possible, extensions to Diameter are defined
within the present document.
2 References
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.
• Non-specific reference may be made only to a complete document or a part thereof and only in the following
cases:
- if it is accepted that it will be possible to use all future changes of the referenced document for the
purposes of the referring document;
- for informative references.
Referenced documents which are not found to be publicly available in the expected location might be found at
http://docbox.etsi.org/Reference.
For online referenced documents, information sufficient to identify and locate the source shall be provided. Preferably,
the primary source of the referenced document should be cited, in order to ensure traceability. Furthermore, the
reference should, as far as possible, remain valid for the expected life of the document. The reference shall include the
method of access to the referenced document and the full network address, with the same punctuation and use of upper
case and lower case letters.
NOTE: While any hyperlinks included in this clause were valid at the time of publication ETSI cannot guarantee
their long term validity.
2.1 Normative references
The following referenced documents are indispensable for the application of the present document. For dated
references, only the edition cited applies. For non-specific references, the latest edition of the referenced document
(including any amendments) applies.
[1] ETSI ES 282 004: "Telecommunications and Internet converged Services and Protocols for
Advanced Networking (TISPAN); NGN Functional Architecture; Network Attachment
Sub-System (NASS)".
[2] ETSI ES 282 003: "Telecommunications and Internet converged Services and Protocols for
Advanced Networking (TISPAN); Resource and Admission Control Sub-system (RACS);
Functional Architecture".
[3] ETSI TS 129 229: "Digital cellular telecommunications system (Phase 2+); Universal Mobile
Telecommunications System (UMTS); Cx and Dx interfaces based on the Diameter protocol;
Protocol details (3GPP TS 29.229)".
[4] ETSI TS 129 329: "Digital cellular telecommunications system (Phase 2+); Universal Mobile
Telecommunications System (UMTS); Sh interface based on the Diameter protocol; Protocol
details (3GPP TS 29.329)".
ETSI

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7 ETSI ES 283 034 V1.5.0 (2008-04)
[5] ETSI TS 129 209: "Universal Mobile Telecommunications System (UMTS); Policy control over
Gq interface (3GPP TS 29.209)".
[6] IETF RFC 2960: "Stream Control Transmission Protocol".
[7] IETF RFC 3588: "Diameter Base Protocol".
[8] IETF RFC 3309: "Stream Control Transmission Protocol (SCTP) Checksum Change".
[9] IETF RFC 4005: "Diameter Network Access Server application".
[10] IETF RFC 3554: "On the use of Stream Control Transmission Protocol (SCTP) with IPsec".
[11] IETF RFC 3046: "DHCP Relay Agent Information Option".
[12] ETSI TS 183 017: "Telecommunications and Internet Converged Services and Protocols for
Advanced Networking (TISPAN); Resource and Admission Control: DIAMETER protocol for
session based policy set up information exchange between the Application Function (AF) and the
Service Policy Decision Function (SPDF); Protocol specification".
2.2 Informative references
Not applicable.
3 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document, the following terms and definitions apply:
Application Function (AF): element of the service layer architecture offering applications that require information
about the characteristics of the IP-connectivity session used to access such applications
Attribute-Value Pair (AVP): corresponds to an Information Element in a Diameter message
NOTE: See RFC 3588 [7].
3.2 Abbreviations
For the purposes of the present document, the following abbreviations apply:
ABNF Augmented Backus-Naur Form
AF Application Function
A-RACF Access-Resource and Admission Control Function
ATM Asynchronous Transfer Mode
AVP Attribute-Value Pair
BGF Border Gateway Function
CLF Connectivity session Location and repository Function
FQDN Fully Qualified Domain Name
IANA Internet Assigned Numbers Authority
ID IDentifier
IETF Internet Engineering Task Force
IPSec IP Security
L2TF Layer 2 Termination Function
NAS Network Access Server
NASS Network Attachment Sub-System
PDBF Profile Data Base Function
PNA Push-Notification-Answer
PNR Push-Notification-Request
ETSI

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8 ETSI ES 283 034 V1.5.0 (2008-04)
RACF Resource and Admission Control Function
RACS Resource and Admission Control Subsystem
RCEF Resource Control Enforcement Function
RFC Request For Comments
SCTP Stream Control Transport Protocol
SPDF Service-based Policy Decision Function
UAAF User Authentication and Authorization Function
UCS Universal Character Set
UDA User-Data-Answer
UDR User-Data-Request
VC Virtual Channel
VP Virtual Path
4 Overview
The Network Attachment Sub-System (NASS), defined in ES 282 004 [1], maintains information about IP-connectivity
associated with user equipment connected to TISPAN networks. This information is stored in the Connectivity Session
Location and Repository Function (CLF) and made accessible to other subsystems and applications through the
following two interfaces (see figure 1):
• The e2 interface enables Application Functions (AF) to retrieve IP-connectivity related session data.
• The e4 interface enables the IP-connectivity related session data to be exchanged between the NASS and the
Resource and Admission Control Subsystem (RACS) defined in ES 282 003 [2].
The present document specifies the protocol for the e4 interface.
Service Control
Subsystems and
Applications
AF
e2
CLF
NASS
e4
Scope of the present
A-RACF
document
RACS
Transfer Functions

Figure 1: NASS external interfaces
ETSI

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9 ETSI ES 283 034 V1.5.0 (2008-04)
5 Procedure descriptions
5.1 General
5.1.1 Information elements
The following clauses describe the realization of the functional procedures defined in the NASS (ES 282 004) [1] and
RACS specifications (ES 282 003 [2]) using Diameter commands described in clause 7. This involves describing a
mapping between the Information Elements defined in the NASS specification (ES 282 004 [1]) and Diameter AVPs.
In the tables that describe this mapping, each Information Element is marked as (M) Mandatory, (C) Conditional or (O)
Optional:
• A mandatory Information Element (marked as (M) in the table) shall always be present in the command. If this
Information Element is absent, an application error occurs at the receiver and an answer message shall be sent
back to the originator of the request with the Result-Code set to DIAMETER_MISSING_AVP. This message
shall also include a Failed-AVP AVP containing the missing Information Element i.e. the corresponding
Diameter AVP defined by the AVP Code and the other fields set as expected for this Information Element.
• A conditional Information Element (marked as (C) in the table) shall be present in the command if certain
conditions are fulfilled:
- If the receiver detects that those conditions are fulfilled and the Information Element is absent, an
application error occurs and an answer message shall be sent back to the originator of the request with
the Result-Code set to DIAMETER_MISSING_AVP. This message shall also include a Failed-AVP
AVP containing the missing Information Element i.e. the corresponding Diameter AVP defined by the
AVP Code and the other fields set as expected for this Information Element. If multiple Information
Elements are missing, all corresponding AVP codes shall be included in the Failed-AVP AVP.
- If those conditions are not fulfilled, the Information Element shall be absent. If however this Information
Element appears in the message, it shall not cause an application error and it may be ignored by the
receiver if this is not explicitly defined as an error case. Otherwise, an application error occurs at the
receiver and an answer message with the Result-Code set to DIAMETER_AVP_NOT_ALLOWED shall
be sent back to the originator of the request. A Failed-AVP AVP containing a copy of the corresponding
Diameter AVP shall be included in this message.
• An optional Information Element (marked as (O) in the table) may be present or absent in the command, at the
discretion of the application at the sending entity. Absence or presence of this Information Element shall not
cause an application error and may be ignored by the receiver.
5.1.2 Subscriber profile
Subscriber profile information sent over the e4 interface is structured into two groups: the QoS Profile Information and
the initial gate setting.
Tables 1 and 2 detail the involved information elements as defined in the NASS specification ES 282 004 [1] and their
mapping to DIAMETER AVPs.
Table 1: Initial gate setting
Information Mapping to Category Description
element name Diameter AVP
List of allowed NAS-Filter-Rule O The list of default destination IP addresses, ports, prefixes and
destinations port ranges to which traffic can be sent.
UL Subscribed Maximum-Allowed- O The maximum amount of bandwidth that can be used without
Bandwidth Bandwidth-UL explicit authorization in the uplink direction.
DL Subscribed Maximum-Allowed- O The maximum amount of bandwidth that can be used without
Bandwidth Bandwidth-DL explicit authorization in the downlink direction.

ETSI

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10 ETSI ES 283 034 V1.5.0 (2008-04)
Table 2: QoS profile information
Information Mapping to Category Description
element name Diameter AVP
Transport Transport-Class O The transport class applicable to the QoS Profile Information.
service class
Media-Type Media-Type O The media type applicable to the QoS Profile information.
UL Subscribed Maximum-Allowed- O The maximum amount of bandwidth subscribed by the attached
Bandwidth Bandwidth-UL user in the uplink direction.
DL Subscribed Maximum-Allowed- O The maximum amount of bandwidth subscribed by the attached
Bandwidth Bandwidth-DL user in the downlink direction.
Maximum Reservation-Priority O The maximum priority allowed for any reservation request.
Priority
Requestor Application Class ID O Identifies the application class(es) that are allowed to request
Name resources for the QoS profile.

5.2 Procedures on the CLF - A-RACF interface
5.2.1 Access profile push
5.2.1.1 Overview
This procedure is used to push session-related information from the CLF to the A-RACF. This information flow occurs
when an IP address has been allocated to a subscriber or in case a modification occurs on a profile that has already been
pushed to the RACS.
The CLF should push session-related-information to the A-RACF as soon as it is available to the CLF. This may require
the CLF to pull part of the information from other components of the NASS.
For the same subscriber, the CLF may push several independent session records with different IP addresses, with or
without the same logical access identifier.
This procedure is mapped to the commands Push-Notification-Request/Answer in the Diameter application specified in
clause 7. Tables 3 and 4 detail the involved information elements as defined in the NASS specification ES 282 004 [1]
and their mapping to Diameter AVPs.
Table 3: Access profile push
Information Mapping to Diameter Category Description
element name AVP
Globally Unique Globally-Unique-Address M This information element contains:
IP Address - The IP address of the user equipment used by the
subscriber for which profile information is being
pushed.
- The addressing domain in which the IP address is
significant.
Logical Access Logical-Access-Id M The identity of the logical access to which the user
ID equipment is connected.
Access Access-Network-Type O The type of access network over which IP connectivity is
Network Type provided to the user equipment.
Subscriber ID User-Name C The user that is attached to the network (see note).
Physical Physical-Access-Id O The identity of the physical access to which the user
Access ID equipment is connected.
Initial Gate Initial-Gate-Setting O See clause 5.1, table 1.
Setting
QoS Profile QoS-Profile O See clause 5.1, table 2.
NOTE: The Subscriber ID shall be included if available in the CLF.

ETSI

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11 ETSI ES 283 034 V1.5.0 (2008-04)
Table 4: Access profile push response
Information Mapping to Diameter AVP Category Description
element name
Result Result-Code / Experimental_ M Result of the request.
Result
Result-Code AVP shall be used for errors defined in the
Diameter Base Protocol.

Experimental-Result AVP shall be used for other errors.
This is a grouped AVP which contains a Vendor-Id AVP,
and the error code in the Experimental-Result-Code
AVP.

5.2.1.2 Procedure at the CLF side
The CLF knows the address of the A-RACF entity where the information should be pushed, either from configuration
data or from the user profile (i.e. received from the UAAF/PDBF).
The CLF shall populate the Access Profile Push as follows:
• The Globally-Unique-Address AVP shall contain a Frame-IP-Address or Frame-IPv6-Prefix AVP value, and
an Address-Realm AVP.
• The Logical-Access-ID AVP shall be present.
The presence of the other AVPs depends on the user profile and local policy rules.
5.2.1.3 Procedure at the A-RACF side
If the Logical Access ID is not included or is invalid, the A-RACF shall return an Access Profile Push response with a
Result-Code AVP value set to DIAMETER_INVALID_AVP_VALUE.
If the globally unique identifier contained in the Globally-Unique-Address AVP is not known, the A-RACF shall:
• Create an internal record to store the received information for future use (i.e. for processing resource
reservation requests received from the SPDF).
• Derive the following information from the Logical Access ID:
- The identification and bandwidth capacity of the layer 2 resources over which the subscriber traffic is
...

Final draft ETSI ES 283 034 V1.5.0 (2008-01)
ETSI Standard


Telecommunications and Internet converged Services and
Protocols for Advanced Networking (TISPAN);
Network Attachment Sub-System (NASS);
e4 interface based on the DIAMETER protocol

---------------------- Page: 1 ----------------------
2 Final draft ETSI ES 283 034 V1.5.0 (2008-01)



Reference
RES/TISPAN-03124-NGN-R1
Keywords
interface, network, system
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE

Tel.: [phone]  Fax: [phone]

Siret N° 348 623 562 00017 - NAF 742 C
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° 7803/88

Important notice
Individual copies of the present document can be downloaded from:
http://www.etsi.org
The present document may be made available in more than one electronic version or in print. In any case of existing or
perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF).
In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive
within ETSI Secretariat.
Users of the present document should be aware that the document may be subject to revision or change of status.
Information on the current status of this and other ETSI documents is available at
http://portal.etsi.org/tb/status/status.asp
If you find errors in the present document, please send your comment to one of the following services:
http://portal.etsi.org/chaircor/ETSI_support.asp
Copyright Notification
No part may be reproduced except as authorized by written permission.
The copyright and the foregoing restriction extend to reproduction in all media.

© European Telecommunications Standards Institute 2008.
All rights reserved.

TM TM TM TM
DECT , PLUGTESTS , UMTS , TIPHON , the TIPHON logo and the ETSI logo are Trade Marks of ETSI registered
for the benefit of its Members.
TM
3GPP is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners.
ETSI

---------------------- Page: 2 ----------------------
3 Final draft ETSI ES 283 034 V1.5.0 (2008-01)
Contents
Intellectual Property Rights.5
Foreword.5
1 Scope.6
2 References.6
2.1 Normative references.6
3 Definitions and abbreviations.7
3.1 Definitions.7
3.2 Abbreviations.7
4 Overview.8
5 Procedure descriptions .9
5.1 General.9
5.1.1 Information elements.9
5.1.2 Subscriber profile.9
5.2 Procedures on the CLF - A-RACF interface .10
5.2.1 Access profile push.10
5.2.1.1 Overview.10
5.2.1.2 Procedure at the CLF side .11
5.2.1.3 Procedure at the A-RACF side.11
5.2.2 Access profile pull .12
5.2.2.1 Overview.12
5.2.2.2 Procedure at the A-RACF side.12
5.2.2.3 Procedure at the CLF side .13
5.2.3 IP connectivity release indication .13
5.2.3.1 Overview.13
5.2.3.2 Procedure at the CLF side .14
5.2.3.3 Procedure at the A-RACF side.14
6 Use of the Diameter base protocol .15
6.1 Securing Diameter messages.15
6.2 Accounting functionality.15
6.3 Use of sessions .15
6.4 Transport protocol.15
6.5 Routing considerations.15
6.6 Advertising application support .15
7 DIAMETER application.16
7.1 Commands.16
7.1.1 User-Data-Request command.16
7.1.2 User-Data-Answer command.17
7.1.3 Push-Notification-Request command.17
7.1.4 Push-Notification-Answer command.18
7.2 Result-Code AVP values.18
7.2.1 Success.18
7.2.2 Permanent failures.19
7.2.3 Transient failures.19
7.3 AVPs.19
7.3.1 Globally-Unique-Address AVP.21
7.3.2 Address-Realm AVP.21
7.3.3 Logical-Access-ID AVP.21
7.3.4 Initial-Gate-Setting AVP.21
7.3.5 QoS-Profile AVP.21
7.3.6 IP-Connectivity-Status AVP.22
7.3.7 Access-Network-Type AVP.22
7.3.8 Aggregation-Network-Type AVP.22
ETSI

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4 Final draft ETSI ES 283 034 V1.5.0 (2008-01)
7.3.9 Maximum-Allowed-Bandwidth-UL AVP.22
7.3.10 Maximum-Allowed-Bandwidth-DL AVP.22
7.3.11 Reservation-Priority.22
7.3.12 Transport-Class.23
7.3.13 Application-Class-ID.23
7.3.14 Physical-Access-ID.23
7.3.15 NAS-Port-Type AVP.23
7.3.16 NAS-Filter-Rule AVP.23
7.3.17 Framed-IP-Address AVP.23
7.3.18 Framed-IP-Prefix AVP.23
7.3.19 Origin-Host AVP.23
7.3.20 AF-Application-Identifier AVP.23
7.3.21 Media-Type AVP.24
7.4 Use of namespaces .24
7.4.1 AVP codes.24
7.4.2 Experimental-Result-Code AVP values.24
7.4.3 Command Code values .24
7.4.4 Application-ID value.24
Annex A (informative): Mapping of e4 operations and terminology to Diameter.25
History .26

ETSI

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5 Final draft ETSI ES 283 034 V1.5.0 (2008-01)
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).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
Foreword
This ETSI Standard (ES) has been produced by ETSI Technical Committee Telecommunications and Internet
converged Services and Protocols for Advanced Networking (TISPAN), and is now submitted for the ETSI standards
Membership Approval Procedure.
ETSI

---------------------- Page: 5 ----------------------
6 Final draft ETSI ES 283 034 V1.5.0 (2008-01)
1 Scope
The present document defines a protocol for use between the TISPAN NGN Network Attachment Sub-System (NASS)
and the Resource and Admission Control Subsystem (RACS), based on Diameter.
The present document is applicable to the e4 interface between the Connectivity Session Location and Repository
Function (CLF) and the RACS.
Whenever it is possible the present document specifies the requirements for this protocol by reference to specifications
produced by the IETF within the scope of Diameter. Where this is not possible, extensions to Diameter are defined
within the present document.
2 References
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.
• Non-specific reference may be made only to a complete document or a part thereof and only in the following
cases:
- if it is accepted that it will be possible to use all future changes of the referenced document for the
purposes of the referring document;
- for informative references.
Referenced documents which are not found to be publicly available in the expected location might be found at
http://docbox.etsi.org/Reference.
For online referenced documents, information sufficient to identify and locate the source shall be provided. Preferably,
the primary source of the referenced document should be cited, in order to ensure traceability. Furthermore, the
reference should, as far as possible, remain valid for the expected life of the document. The reference shall include the
method of access to the referenced document and the full network address, with the same punctuation and use of upper
case and lower case letters.
NOTE: While any hyperlinks included in this clause were valid at the time of publication ETSI cannot guarantee
their long term validity.
2.1 Normative references
The following referenced documents are indispensable for the application of the present document. For dated
references, only the edition cited applies. For non-specific references, the latest edition of the referenced document
(including any amendments) applies.
[1] ETSI ES 282 004: "Telecommunications and Internet converged Services and Protocols for
Advanced Networking (TISPAN); NGN Functional Architecture; Network Attachment
Sub-System (NASS)".
[2] ETSI ES 282 003: "Telecommunications and Internet converged Services and Protocols for
Advanced Networking (TISPAN); Resource and Admission Control Sub-system (RACS);
Functional Architecture".
[3] ETSI TS 129 229: "Digital cellular telecommunications system (Phase 2+); Universal Mobile
Telecommunications System (UMTS); Cx and Dx interfaces based on the Diameter protocol;
Protocol details (3GPP TS 29.229)".
[4] ETSI TS 129 329: "Digital cellular telecommunications system (Phase 2+); Universal Mobile
Telecommunications System (UMTS); Sh interface based on the Diameter protocol; Protocol
details (3GPP TS 29.329)".
ETSI

---------------------- Page: 6 ----------------------
7 Final draft ETSI ES 283 034 V1.5.0 (2008-01)
[5] ETSI TS 129 209: "Universal Mobile Telecommunications System (UMTS); Policy control over
Gq interface (3GPP TS 29.209)".
[6] IETF RFC 2960: "Stream Control Transmission Protocol".
[7] IETF RFC 3588: "Diameter Base Protocol".
[8] IETF RFC 3309: "Stream Control Transmission Protocol (SCTP) Checksum Change".
[9] IETF RFC 4005: "Diameter Network Access Server application".
[10] IETF RFC 3554: "On the use of Stream Control Transmission Protocol (SCTP) with IPsec".
[11] IETF RFC 3046: "DHCP Relay Agent Information Option".
[12] ETSI TS 183 017: "Telecommunications and Internet Converged Services and Protocols for
Advanced Networking (TISPAN); Resource and Admission Control: DIAMETER protocol for
session based policy set up information exchange between the Application Function (AF) and the
Service Policy Decision Function (SPDF); Protocol specification".
3 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document, the following terms and definitions apply:
Application Function (AF): element of the service layer architecture offering applications that require information
about the characteristics of the IP-connectivity session used to access such applications
Attribute-Value Pair (AVP): corresponds to an Information Element in a Diameter message
NOTE: See RFC 3588 [7].
3.2 Abbreviations
For the purposes of the present document, the following abbreviations apply:
ABNF Augmented Backus-Naur Form
AF Application Function
A-RACF Access-Resource and Admission Control Function
ATM Asynchronous Transfer Mode
AVP Attribute-Value Pair
BGF Border Gateway Function
CLF Connectivity session Location and repository Function
FQDN Fully Qualified Domain Name
IANA Internet Assigned Numbers Authority
ID IDentifier
IETF Internet Engineering Task Force
IPSec IP Security
L2TF Layer 2 Termination Function
NAS Network Access Server
NASS Network Attachment Sub-System
PDBF Profile Data Base Function
PNA Push-Notification-Answer
PNR Push-Notification-Request
RACF Resource and Admission Control Function
RACS Resource and Admission Control Subsystem
RCEF Resource Control Enforcement Function
RFC Request For Comments
SCTP Stream Control Transport Protocol
ETSI

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8 Final draft ETSI ES 283 034 V1.5.0 (2008-01)
SPDF Service-based Policy Decision Function
UAAF User Authentication and Authorization Function
UCS Universal Character Set
UDA User-Data-Answer
UDR User-Data-Request
VC Virtual Channel
VP Virtual Path
4 Overview
The Network Attachment Sub-System (NASS), defined in ES 282 004 [1], maintains information about IP-connectivity
associated with user equipment connected to TISPAN networks. This information is stored in the Connectivity Session
Location and Repository Function (CLF) and made accessible to other subsystems and applications through the
following two interfaces (see figure 1):
• The e2 interface enables Application Functions (AF) to retrieve IP-connectivity related session data.
• The e4 interface enables the IP-connectivity related session data to be exchanged between the NASS and the
Resource and Admission Control Subsystem (RACS) defined in ES 282 003 [2].
The present document specifies the protocol for the e4 interface.
Service Control
Subsystems and
AF Applications
e2
CLF
NASS
e4
Scope of the present
document A-RACF
RACS
Transfer Functions

Figure 1: NASS external interfaces
ETSI

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9 Final draft ETSI ES 283 034 V1.5.0 (2008-01)
5 Procedure descriptions
5.1 General
5.1.1 Information elements
The following clauses describe the realization of the functional procedures defined in the NASS (ES 282 004) [1] and
RACS specifications (ES 282 003 [2]) using Diameter commands described in clause 7. This involves describing a
mapping between the Information Elements defined in the NASS specification (ES 282 004 [1]) and Diameter AVPs.
In the tables that describe this mapping, each Information Element is marked as (M) Mandatory, (C) Conditional or (O)
Optional:
• A mandatory Information Element (marked as (M) in the table) shall always be present in the command. If this
Information Element is absent, an application error occurs at the receiver and an answer message shall be sent
back to the originator of the request with the Result-Code set to DIAMETER_MISSING_AVP. This message
shall also include a Failed-AVP AVP containing the missing Information Element i.e. the corresponding
Diameter AVP defined by the AVP Code and the other fields set as expected for this Information Element.
• A conditional Information Element (marked as (C) in the table) shall be present in the command if certain
conditions are fulfilled:
- If the receiver detects that those conditions are fulfilled and the Information Element is absent, an
application error occurs and an answer message shall be sent back to the originator of the request with
the Result-Code set to DIAMETER_MISSING_AVP. This message shall also include a Failed-AVP
AVP containing the missing Information Element i.e. the corresponding Diameter AVP defined by the
AVP Code and the other fields set as expected for this Information Element. If multiple Information
Elements are missing, all corresponding AVP codes shall be included in the Failed-AVP AVP.
- If those conditions are not fulfilled, the Information Element shall be absent. If however this Information
Element appears in the message, it shall not cause an application error and it may be ignored by the
receiver if this is not explicitly defined as an error case. Otherwise, an application error occurs at the
receiver and an answer message with the Result-Code set to DIAMETER_AVP_NOT_ALLOWED shall
be sent back to the originator of the request. A Failed-AVP AVP containing a copy of the corresponding
Diameter AVP shall be included in this message.
• An optional Information Element (marked as (O) in the table) may be present or absent in the command, at the
discretion of the application at the sending entity. Absence or presence of this Information Element shall not
cause an application error and may be ignored by the receiver.
5.1.2 Subscriber profile
Subscriber profile information sent over the e4 interface is structured into two groups: the QoS Profile Information and
the initial gate setting.
Tables 1 and 2 detail the involved information elements as defined in the NASS specification ES 282 004 [1] and their
mapping to DIAMETER AVPs.
Table 1: Initial gate setting
Information Mapping to Category Description
element name Diameter AVP
List of allowed NAS-Filter-Rule O The list of default destination IP addresses, ports, prefixes and
destinations port ranges to which traffic can be sent.
UL Subscribed Maximum-Allowed- O The maximum amount of bandwidth that can be used without
Bandwidth Bandwidth-UL explicit authorization in the uplink direction.
DL Subscribed Maximum-Allowed- O The maximum amount of bandwidth that can be used without
Bandwidth Bandwidth-DL explicit authorization in the downlink direction.

ETSI

---------------------- Page: 9 ----------------------
10 Final draft ETSI ES 283 034 V1.5.0 (2008-01)
Table 2: QoS profile information
Information Mapping to Category Description
element name Diameter AVP
Transport Transport-Class O The transport class applicable to the QoS Profile Information.
service class
Media-Type Media-Type O The media type applicable to the QoS Profile information.
UL Subscribed Maximum-Allowed- O The maximum amount of bandwidth subscribed by the attached
Bandwidth Bandwidth-UL user in the uplink direction.
DL Subscribed Maximum-Allowed- O The maximum amount of bandwidth subscribed by the attached
Bandwidth Bandwidth-DL user in the downlink direction.
Maximum Reservation-Priority O The maximum priority allowed for any reservation request.
Priority
Requestor Application Class ID O Identifies the application class(es) that are allowed to request
Name resources for the QoS profile.

5.2 Procedures on the CLF - A-RACF interface
5.2.1 Access profile push
5.2.1.1 Overview
This procedure is used to push session-related information from the CLF to the A-RACF. This information flow occurs
when an IP address has been allocated to a subscriber or in case a modification occurs on a profile that has already been
pushed to the RACS.
The CLF should push session-related-information to the A-RACF as soon as it is available to the CLF. This may require
the CLF to pull part of the information from other components of the NASS.
For the same subscriber, the CLF may push several independent session records with different IP addresses, with or
without the same logical access identifier.
This procedure is mapped to the commands Push-Notification-Request/Answer in the Diameter application specified in
clause 7. Tables 3 and 4 detail the involved information elements as defined in the NASS specification ES 282 004 [1]
and their mapping to Diameter AVPs.
Table 3: Access profile push
Information Mapping to Diameter Category Description
element name AVP
Globally Unique Globally-Unique-Address M This information element contains:
IP Address - The IP address of the user equipment used by the
subscriber for which profile information is being
pushed.
- The addressing domain in which the IP address is
significant.
Logical Access Logical-Access-Id M The identity of the logical access to which the user
ID equipment is connected.
Access Access-Network-Type O The type of access network over which IP connectivity is
Network Type provided to the user equipment.
Subscriber ID User-Name C The user that is attached to the network (see note).
Physical Physical-Access-Id O The identity of the physical access to which the user
Access ID equipment is connected.
Initial Gate Initial-Gate-Setting O See clause 5.1, table 1.
Setting
QoS Profile QoS-Profile O See clause 5.1, table 2.
NOTE: The Subscriber ID shall be included if available in the CLF.

ETSI

---------------------- Page: 10 ----------------------
11 Final draft ETSI ES 283 034 V1.5.0 (2008-01)
Table 4: Access profile push response
Information Mapping to Diameter AVP Category Description
element name
Result Result-Code / Experimental_ M Result of the request.
Result
Result-Code AVP shall be used for errors defined in the
Diameter Base Protocol.

Experimental-Result AVP shall be used for other errors.
This is a grouped AVP which contains a Vendor-Id AVP,
and the error code in the Experimental-Result-Code
AVP.

5.2.1.2 Procedure at the CLF side
The CLF knows the address of the A-RACF entity where the information should be pushed, either from configuration
data or from the user profile (i.e. received from the UAAF/PDBF).
The CLF shall populate the Access Profile Push as follows:
• The Globally-Unique-Address AVP shall contain a Frame-IP-Address or Frame-IPv6-Prefix AVP value, and
an Address-Realm AVP.
• The Logical-Access-ID AVP shall be present.
The presence of the other AVPs depends on the user profile and local policy rules.
5.2.1.3 Procedure at the A-RACF side
If the Logical Access ID is not included or is invalid, the A-RACF shall return an Access Profile Push response with a
Result-Code AVP value set to DIAMETER_INVALID_AVP_VALUE.
If the globally unique identifier contained in the Globally-Unique-Address AVP is not known, the A-RACF shall:
• Create an internal record to store the received information for future use (i.e. for processing resource
reservation requests received from the SPDF).
• Derive the following information from the Logical Access ID:
- The identification and bandwidth capacity of the layer 2 resources over which the subscriber traffic is
car
...

SLOVENSKI STANDARD
SIST ES 283 034 V1.5.0:2008
01-julij-2008
=OLWHWHOHNRPXQLNDFLMVNHLQLQWHUQHWQHVWRULWYHWHUSURWRNROL]DQDSUHGQRRPUHåHQMH
7,63$13RGVLVWHPRPUHåQHSULNOMXþLWYH1$669PHVQLNHQDSRGODJL
SURWRNROD',$0(7(5
Telecommunications and Internet converged Services and Protocols for Advanced
Networking (TISPAN) - Network Attachment Sub-System (NASS) - e4 interface based on
the DIAMETER protocol
Ta slovenski standard je istoveten z: ES 283 034 Version 1.5.0
ICS:
33.040.01 Telekomunikacijski sistemi Telecommunication systems
na splošno in general
33.080 Digitalno omrežje z Integrated Services Digital
integriranimi storitvami Network (ISDN)
(ISDN)
SIST ES 283 034 V1.5.0:2008 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------

SIST ES 283 034 V1.5.0:2008

---------------------- Page: 2 ----------------------

SIST ES 283 034 V1.5.0:2008

ETSI ES 283 034 V1.5.0 (2008-04)
ETSI Standard


Telecommunications and Internet converged Services and
Protocols for Advanced Networking (TISPAN);
Network Attachment Sub-System (NASS);
e4 interface based on the DIAMETER protocol

---------------------- Page: 3 ----------------------

SIST ES 283 034 V1.5.0:2008
 2 ETSI ES 283 034 V1.5.0 (2008-04)



Reference
RES/TISPAN-03124-NGN-R1
Keywords
interface, network, system
ETSI
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Tel.: [phone]  Fax: [phone]

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Sous-Préfecture de Grasse (06) N° 7803/88

Important notice
Individual copies of the present document can be downloaded from:
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The present document may be made available in more than one electronic version or in print. In any case of existing or
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within ETSI Secretariat.
Users of the present document should be aware that the document may be subject to revision or change of status.
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If you find errors in the present document, please send your comment to one of the following services:
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No part may be reproduced except as authorized by written permission.
The copyright and the foregoing restriction extend to reproduction in all media.

© European Telecommunications Standards Institute 2008.
All rights reserved.

TM TM TM TM
DECT , PLUGTESTS , UMTS , TIPHON , the TIPHON logo and the ETSI logo are Trade Marks of ETSI registered
for the benefit of its Members.
TM
3GPP is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners.
ETSI

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SIST ES 283 034 V1.5.0:2008
 3 ETSI ES 283 034 V1.5.0 (2008-04)
Contents
Intellectual Property Rights.5
Foreword.5
1 Scope.6
2 References.6
2.1 Normative references.6
2.2 Informative references.7
3 Definitions and abbreviations.7
3.1 Definitions.7
3.2 Abbreviations.7
4 Overview.8
5 Procedure descriptions .9
5.1 General.9
5.1.1 Information elements.9
5.1.2 Subscriber profile.9
5.2 Procedures on the CLF - A-RACF interface .10
5.2.1 Access profile push.10
5.2.1.1 Overview.10
5.2.1.2 Procedure at the CLF side .11
5.2.1.3 Procedure at the A-RACF side.11
5.2.2 Access profile pull .12
5.2.2.1 Overview.12
5.2.2.2 Procedure at the A-RACF side.13
5.2.2.3 Procedure at the CLF side .13
5.2.3 IP connectivity release indication .14
5.2.3.1 Overview.14
5.2.3.2 Procedure at the CLF side .14
5.2.3.3 Procedure at the A-RACF side.15
6 Use of the Diameter base protocol .15
6.1 Securing Diameter messages.15
6.2 Accounting functionality.15
6.3 Use of sessions .15
6.4 Transport protocol.15
6.5 Routing considerations.16
6.6 Advertising application support .16
7 DIAMETER application.16
7.1 Commands.16
7.1.1 User-Data-Request command.17
7.1.2 User-Data-Answer command.17
7.1.3 Push-Notification-Request command.18
7.1.4 Push-Notification-Answer command.18
7.2 Result-Code AVP values.18
7.2.1 Success.19
7.2.2 Permanent failures.19
7.2.3 Transient failures.19
7.3 AVPs.20
7.3.1 Globally-Unique-Address AVP.21
7.3.2 Address-Realm AVP.21
7.3.3 Logical-Access-ID AVP.21
7.3.4 Initial-Gate-Setting AVP.22
7.3.5 QoS-Profile AVP.22
7.3.6 IP-Connectivity-Status AVP.22
7.3.7 Access-Network-Type AVP.22
ETSI

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SIST ES 283 034 V1.5.0:2008
 4 ETSI ES 283 034 V1.5.0 (2008-04)
7.3.8 Aggregation-Network-Type AVP.23
7.3.9 Maximum-Allowed-Bandwidth-UL AVP.23
7.3.10 Maximum-Allowed-Bandwidth-DL AVP.23
7.3.11 Reservation-Priority.23
7.3.12 Transport-Class.23
7.3.13 Application-Class-ID.23
7.3.14 Physical-Access-ID.24
7.3.15 NAS-Port-Type AVP.24
7.3.16 NAS-Filter-Rule AVP.24
7.3.17 Framed-IP-Address AVP.24
7.3.18 Framed-IP-Prefix AVP.24
7.3.19 Origin-Host AVP.24
7.3.20 AF-Application-Identifier AVP.24
7.3.21 Media-Type AVP.24
7.4 Use of namespaces .24
7.4.1 AVP codes.24
7.4.2 Experimental-Result-Code AVP values.24
7.4.3 Command Code values .24
7.4.4 Application-ID value.25
Annex A (informative): Mapping of e4 operations and terminology to Diameter.26
History .27

ETSI

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SIST ES 283 034 V1.5.0:2008
 5 ETSI ES 283 034 V1.5.0 (2008-04)
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).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
Foreword
This ETSI Standard (ES) has been produced by ETSI Technical Committee Telecommunications and Internet
converged Services and Protocols for Advanced Networking (TISPAN).
ETSI

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SIST ES 283 034 V1.5.0:2008
 6 ETSI ES 283 034 V1.5.0 (2008-04)
1 Scope
The present document defines a protocol for use between the TISPAN NGN Network Attachment Sub-System (NASS)
and the Resource and Admission Control Subsystem (RACS), based on Diameter.
The present document is applicable to the e4 interface between the Connectivity Session Location and Repository
Function (CLF) and the RACS.
Whenever it is possible the present document specifies the requirements for this protocol by reference to specifications
produced by the IETF within the scope of Diameter. Where this is not possible, extensions to Diameter are defined
within the present document.
2 References
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.
• Non-specific reference may be made only to a complete document or a part thereof and only in the following
cases:
- if it is accepted that it will be possible to use all future changes of the referenced document for the
purposes of the referring document;
- for informative references.
Referenced documents which are not found to be publicly available in the expected location might be found at
http://docbox.etsi.org/Reference.
For online referenced documents, information sufficient to identify and locate the source shall be provided. Preferably,
the primary source of the referenced document should be cited, in order to ensure traceability. Furthermore, the
reference should, as far as possible, remain valid for the expected life of the document. The reference shall include the
method of access to the referenced document and the full network address, with the same punctuation and use of upper
case and lower case letters.
NOTE: While any hyperlinks included in this clause were valid at the time of publication ETSI cannot guarantee
their long term validity.
2.1 Normative references
The following referenced documents are indispensable for the application of the present document. For dated
references, only the edition cited applies. For non-specific references, the latest edition of the referenced document
(including any amendments) applies.
[1] ETSI ES 282 004: "Telecommunications and Internet converged Services and Protocols for
Advanced Networking (TISPAN); NGN Functional Architecture; Network Attachment
Sub-System (NASS)".
[2] ETSI ES 282 003: "Telecommunications and Internet converged Services and Protocols for
Advanced Networking (TISPAN); Resource and Admission Control Sub-system (RACS);
Functional Architecture".
[3] ETSI TS 129 229: "Digital cellular telecommunications system (Phase 2+); Universal Mobile
Telecommunications System (UMTS); Cx and Dx interfaces based on the Diameter protocol;
Protocol details (3GPP TS 29.229)".
[4] ETSI TS 129 329: "Digital cellular telecommunications system (Phase 2+); Universal Mobile
Telecommunications System (UMTS); Sh interface based on the Diameter protocol; Protocol
details (3GPP TS 29.329)".
ETSI

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SIST ES 283 034 V1.5.0:2008
 7 ETSI ES 283 034 V1.5.0 (2008-04)
[5] ETSI TS 129 209: "Universal Mobile Telecommunications System (UMTS); Policy control over
Gq interface (3GPP TS 29.209)".
[6] IETF RFC 2960: "Stream Control Transmission Protocol".
[7] IETF RFC 3588: "Diameter Base Protocol".
[8] IETF RFC 3309: "Stream Control Transmission Protocol (SCTP) Checksum Change".
[9] IETF RFC 4005: "Diameter Network Access Server application".
[10] IETF RFC 3554: "On the use of Stream Control Transmission Protocol (SCTP) with IPsec".
[11] IETF RFC 3046: "DHCP Relay Agent Information Option".
[12] ETSI TS 183 017: "Telecommunications and Internet Converged Services and Protocols for
Advanced Networking (TISPAN); Resource and Admission Control: DIAMETER protocol for
session based policy set up information exchange between the Application Function (AF) and the
Service Policy Decision Function (SPDF); Protocol specification".
2.2 Informative references
Not applicable.
3 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document, the following terms and definitions apply:
Application Function (AF): element of the service layer architecture offering applications that require information
about the characteristics of the IP-connectivity session used to access such applications
Attribute-Value Pair (AVP): corresponds to an Information Element in a Diameter message
NOTE: See RFC 3588 [7].
3.2 Abbreviations
For the purposes of the present document, the following abbreviations apply:
ABNF Augmented Backus-Naur Form
AF Application Function
A-RACF Access-Resource and Admission Control Function
ATM Asynchronous Transfer Mode
AVP Attribute-Value Pair
BGF Border Gateway Function
CLF Connectivity session Location and repository Function
FQDN Fully Qualified Domain Name
IANA Internet Assigned Numbers Authority
ID IDentifier
IETF Internet Engineering Task Force
IPSec IP Security
L2TF Layer 2 Termination Function
NAS Network Access Server
NASS Network Attachment Sub-System
PDBF Profile Data Base Function
PNA Push-Notification-Answer
PNR Push-Notification-Request
ETSI

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SIST ES 283 034 V1.5.0:2008
 8 ETSI ES 283 034 V1.5.0 (2008-04)
RACF Resource and Admission Control Function
RACS Resource and Admission Control Subsystem
RCEF Resource Control Enforcement Function
RFC Request For Comments
SCTP Stream Control Transport Protocol
SPDF Service-based Policy Decision Function
UAAF User Authentication and Authorization Function
UCS Universal Character Set
UDA User-Data-Answer
UDR User-Data-Request
VC Virtual Channel
VP Virtual Path
4 Overview
The Network Attachment Sub-System (NASS), defined in ES 282 004 [1], maintains information about IP-connectivity
associated with user equipment connected to TISPAN networks. This information is stored in the Connectivity Session
Location and Repository Function (CLF) and made accessible to other subsystems and applications through the
following two interfaces (see figure 1):
• The e2 interface enables Application Functions (AF) to retrieve IP-connectivity related session data.
• The e4 interface enables the IP-connectivity related session data to be exchanged between the NASS and the
Resource and Admission Control Subsystem (RACS) defined in ES 282 003 [2].
The present document specifies the protocol for the e4 interface.
Service Control
Subsystems and
Applications
AF
e2
CLF
NASS
e4
Scope of the present
A-RACF
document
RACS
Transfer Functions

Figure 1: NASS external interfaces
ETSI

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SIST ES 283 034 V1.5.0:2008
 9 ETSI ES 283 034 V1.5.0 (2008-04)
5 Procedure descriptions
5.1 General
5.1.1 Information elements
The following clauses describe the realization of the functional procedures defined in the NASS (ES 282 004) [1] and
RACS specifications (ES 282 003 [2]) using Diameter commands described in clause 7. This involves describing a
mapping between the Information Elements defined in the NASS specification (ES 282 004 [1]) and Diameter AVPs.
In the tables that describe this mapping, each Information Element is marked as (M) Mandatory, (C) Conditional or (O)
Optional:
• A mandatory Information Element (marked as (M) in the table) shall always be present in the command. If this
Information Element is absent, an application error occurs at the receiver and an answer message shall be sent
back to the originator of the request with the Result-Code set to DIAMETER_MISSING_AVP. This message
shall also include a Failed-AVP AVP containing the missing Information Element i.e. the corresponding
Diameter AVP defined by the AVP Code and the other fields set as expected for this Information Element.
• A conditional Information Element (marked as (C) in the table) shall be present in the command if certain
conditions are fulfilled:
- If the receiver detects that those conditions are fulfilled and the Information Element is absent, an
application error occurs and an answer message shall be sent back to the originator of the request with
the Result-Code set to DIAMETER_MISSING_AVP. This message shall also include a Failed-AVP
AVP containing the missing Information Element i.e. the corresponding Diameter AVP defined by the
AVP Code and the other fields set as expected for this Information Element. If multiple Information
Elements are missing, all corresponding AVP codes shall be included in the Failed-AVP AVP.
- If those conditions are not fulfilled, the Information Element shall be absent. If however this Information
Element appears in the message, it shall not cause an application error and it may be ignored by the
receiver if this is not explicitly defined as an error case. Otherwise, an application error occurs at the
receiver and an answer message with the Result-Code set to DIAMETER_AVP_NOT_ALLOWED shall
be sent back to the originator of the request. A Failed-AVP AVP containing a copy of the corresponding
Diameter AVP shall be included in this message.
• An optional Information Element (marked as (O) in the table) may be present or absent in the command, at the
discretion of the application at the sending entity. Absence or presence of this Information Element shall not
cause an application error and may be ignored by the receiver.
5.1.2 Subscriber profile
Subscriber profile information sent over the e4 interface is structured into two groups: the QoS Profile Information and
the initial gate setting.
Tables 1 and 2 detail the involved information elements as defined in the NASS specification ES 282 004 [1] and their
mapping to DIAMETER AVPs.
Table 1: Initial gate setting
Information Mapping to Category Description
element name Diameter AVP
List of allowed NAS-Filter-Rule O The list of default destination IP addresses, ports, prefixes and
destinations port ranges to which traffic can be sent.
UL Subscribed Maximum-Allowed- O The maximum amount of bandwidth that can be used without
Bandwidth Bandwidth-UL explicit authorization in the uplink direction.
DL Subscribed Maximum-Allowed- O The maximum amount of bandwidth that can be used without
Bandwidth Bandwidth-DL explicit authorization in the downlink direction.

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Table 2: QoS profile information
Information Mapping to Category Description
element name Diameter AVP
Transport Transport-Class O The transport class applicable to the QoS Profile Information.
service class
Media-Type Media-Type O The media type applicable to the QoS Profile information.
UL Subscribed Maximum-Allowed- O The maximum amount of bandwidth subscribed by the attached
Bandwidth Bandwidth-UL user in the uplink direction.
DL Subscribed Maximum-Allowed- O The maximum amount of bandwidth subscribed by the attached
Bandwidth Bandwidth-DL user in the downlink direction.
Maximum Reservation-Priority O The maximum priority allowed for any reservation request.
Priority
Requestor Application Class ID O Identifies the application class(es) that are allowed to request
Name resources for the QoS profile.

5.2 Procedures on the CLF - A-RACF interface
5.2.1 Access profile push
5.2.1.1 Overview
This procedure is used to push session-related information from the CLF to the A-RACF. This information flow occurs
when an IP address has been allocated to a subscriber or in case a modification occurs on a profile that has already been
pushed to the RACS.
The CLF should push session-related-information to the A-RACF as soon as it is available to the CLF. This may require
the CLF to pull part of the information from other components of the NASS.
For the same subscriber, the CLF may push several independent session records with different IP addresses, with or
without the same logical access identifier.
This procedure is mapped to the commands Push-Notification-Request/Answer in the Diameter application specified in
clause 7. Tables 3 and 4 detail the involved information elements as defined in the NASS specification ES 282 004 [1]
and their mapping to Diameter AVPs.
Table 3: Access profile push
Information Mapping to Diameter Category Description
element name AVP
Globally Unique Globally-Unique-Address M This information element contains:
IP Address - The IP address of the user equipment used by the
subscriber for which profile information is being
pushed.
- The addressing domain in which the IP address is
significant.
Logical Access Logical-Access-Id M The identity of the logical access to which the user
ID equipment is connected.
Access Access-Network-Type O The type of access network over which IP connectivity is
Network Type provided to the user equipment.
Subscriber ID User-Name C The user that is attached to the network (see note).
Physical Physical-Access-Id O The identity of the physical access to which the user
Access ID equipment is connected.
Initial Gate Initial-Gate-Setting O See clause 5.1, table 1.
Setting
QoS Profile QoS-Profile O See clause 5.1, table 2.
NOTE: The Subscriber ID shall be included if available in the CLF.

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Table 4: Access profile push response
Information Mapping to Diameter AVP Category Description
element name
Result Result-Code / Experimental_ M Result of the request.
Result
Result-Code AVP shall be used for errors defined in the
Diameter Base Protocol.

Experimental-Result AVP shall be used for
...