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

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.

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
29-Jan-2009
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
14-Jan-2009
Due Date
21-Mar-2009
Completion Date
30-Jan-2009

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ETSI ES 283 034 V2.2.0 (2008-07)
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 V2.2.0 (2008-07)
Reference
RES/TISPAN-03139-NGN-R2
Keywords
interface, network, system
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE
Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16
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.

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 V2.2.0 (2008-07)
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 NASS User 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................................................................................................................................................................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-Description AVP.........................................................................................................21

7.3.5 QoS-Profile-Description AVP....................................................................................................................21

7.3.6 IP-Connectivity-Status AVP.......................................................................................................................22

7.3.7 Access-Network-Type AVP.......................................................................................................................22

ETSI
---------------------- Page: 3 ----------------------
4 ETSI ES 283 034 V2.2.0 (2008-07)

7.3.8 Aggregation-Network-Type AVP...............................................................................................................22

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............................................................................................................................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

7.3.22 Initial-Gate-Setting-ID AVP.......................................................................................................................24

7.3.23 QoS-Profile-ID 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
---------------------- Page: 4 ----------------------
5 ETSI ES 283 034 V2.2.0 (2008-07)
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 V2.2.0 (2008-07)
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 ETSI ES 283 034 V2.2.0 (2008-07)

[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

The following referenced documents are not essential to the use of the present document but they assist the user with

regard to a particular subject area. For non-specific references, the latest version of the referenced document (including

any amendments) applies.
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].
NASS User: See definition in [1].
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
CLF Connectivity session Location and repository Function
DHCP Dynamic Host Configuration Protocol
FQDN Fully Qualified Domain Name
IANA Internet Assigned Numbers Authority
ID IDentifier
IETF Internet Engineering Task Force
IPSec IP Security
NAS Network Access Server
ETSI
---------------------- Page: 7 ----------------------
8 ETSI ES 283 034 V2.2.0 (2008-07)
NASS Network Attachment Sub-System
PDBF Profile Data Base Function
PNA Push-Notification-Answer
PNR Push-Notification-Request
QoS Quality of Service
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
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 uNASS Users 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
CLF
NASS
Scope of the present
A-RACF
document
RACS
Transfer Functions
Figure 1: NASS external interfaces
ETSI
---------------------- Page: 8 ----------------------
9 ETSI ES 283 034 V2.2.0 (2008-07)
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 tables 1 to 8) 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 tables 1 to 8) 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 tables 1 to 8) 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 NASS User profile

NASS User profile information sent over the e4 interface comprises QoS profile information and initial gate setting

information. Each of these pieces of information may be sent in the form of an identifier using the QoS-Profile-ID and

Initial-Gate-Setting-ID AVPs or in the form of an explicit description using the QoS-Profile-Description and Initial-

Gate-Setting-Description AVPs.

Tables 1 and 2 detail the information elements involved in the second case as defined in the NASS specification

ES 282 004 [1] and their mapping to DIAMETER AVPs.
ETSI
---------------------- Page: 9 ----------------------
10 ETSI ES 283 034 V2.2.0 (2008-07)
Table 1: Initial gate setting description
Information Mapping to Cat. Description
element name Diameter AVP

List of allowed NAS-Filter-Rule O In case of unicast data, the list of default destination IP addresses

destinations as ports, prefixes and port ranges to which traffic can be sent. In case of

well as multicast, the list of IP-Multicast group addresses and/or the list of

multicast flows (Source IP address, IP-Multicast group address) pairs which traffic can

be received from by the attached NASS User.

List of denied NAS-Filter-Rule O In case of unicast, the list of default destination IP addresses ports,

destinations as prefixes and port ranges to which traffic is denied. In case of multicast,

well as the list of IP-Multicast group addresses and/or the list of (Source IP

multicast flows address, IP-Multicast group address) pairs for which traffic towards the

attached NASS User must be denied.

UL Subscribed Maximum-Allowed- O The maximum amount of bandwidth that can be used without explicit

Bandwidth Bandwidth-UL authorization in the uplink direction.

DL Subscribed Maximum-Allowed- O The maximum amount of bandwidth that can be used without explicit

Bandwidth Bandwidth-DL authorization in the downlink direction.
Table 2: QoS profile description
Information Mapping to Cat. 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 NASS

Bandwidth Bandwidth-UL User in the uplink direction.

DL Subscribed Maximum-Allowed- O The maximum amount of bandwidth subscribed by the attached NASS

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 NASS User 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 NASS User, 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.
ETSI
---------------------- Page: 10 ----------------------
11 ETSI ES 283 034 V2.2.0 (2008-07)
Table 3: Access profile push
Information Mapping to Diameter Cat. Description
element name AVP
Globally Unique Globally-Unique-Address M This information element contains:
IP Address - The IP address of the NASS User 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 equipment is

ID connected.

Access Access-Network-Type O The type of access network over which IP connectivity is provided

Network Type to the user equipment.

NASS User ID User-Name C The NASS User that is attached to the network (see note).

Physical Physical-Access-Id O The identity of the physical access to which the user equipment is

Access ID connected.
Initial Gate Initial-Gate-Setting or O See clause 5.1, table 1.
Setting Initial-Gate-Setting-ID
QoS Profile QoS-Profile or QoS- O See clause 5.1, table 2.
Profile-ID
NOTE: The NASS User ID shall be included if available in the CLF.
Table 4: Access profile push response
Information Mapping to Diameter AVP Cat. Description
element n
...

Final draft ETSI ES 283 034 V2.2.0 (2008-05)
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 V2.2.0 (2008-05)
Reference
RES/TISPAN-03139-NGN-R2
Keywords
interface, network, system
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE
Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16
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.

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 V2.2.0 (2008-05)
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 NASS User 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................................................................................................................................................................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-Description AVP.........................................................................................................21

7.3.5 QoS-Profile-Description AVP....................................................................................................................21

7.3.6 IP-Connectivity-Status AVP.......................................................................................................................22

7.3.7 Access-Network-Type AVP.......................................................................................................................22

ETSI
---------------------- Page: 3 ----------------------
4 Final draft ETSI ES 283 034 V2.2.0 (2008-05)

7.3.8 Aggregation-Network-Type AVP...............................................................................................................22

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............................................................................................................................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

7.3.22 Initial-Gate-Setting-ID AVP.......................................................................................................................24

7.3.23 QoS-Profile-ID 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
---------------------- Page: 4 ----------------------
5 Final draft ETSI ES 283 034 V2.2.0 (2008-05)
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 V2.2.0 (2008-05)
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 V2.2.0 (2008-05)

[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

The following referenced documents are not essential to the use of the present document but they assist the user with

regard to a particular subject area. For non-specific references, the latest version of the referenced document (including

any amendments) applies.
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].
NASS User: See definition in [1].
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
CLF Connectivity session Location and repository Function
DHCP Dynamic Host Configuration Protocol
FQDN Fully Qualified Domain Name
IANA Internet Assigned Numbers Authority
ID IDentifier
IETF Internet Engineering Task Force
IPSec IP Security
NAS Network Access Server
ETSI
---------------------- Page: 7 ----------------------
8 Final draft ETSI ES 283 034 V2.2.0 (2008-05)
NASS Network Attachment Sub-System
PDBF Profile Data Base Function
PNA Push-Notification-Answer
PNR Push-Notification-Request
QoS Quality of Service
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
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 uNASS Users 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
CLF
NASS
Scope of the present
A-RACF
document
RACS
Transfer Functions
Figure 1: NASS external interfaces
ETSI
---------------------- Page: 8 ----------------------
9 Final draft ETSI ES 283 034 V2.2.0 (2008-05)
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 tables 1 to 8) 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 tables 1 to 8) 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 tables 1 to 8) 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 NASS User profile

NASS User profile information sent over the e4 interface comprises QoS profile information and initial gate setting

information. Each of these pieces of information may be sent in the form of an identifier using the QoS-Profile-ID and

Initial-Gate-Setting-ID AVPs or in the form of an explicit description using the QoS-Profile-Description and Initial-

Gate-Setting-Description AVPs.

Tables 1 and 2 detail the information elements involved in the second case as defined in the NASS specification

ES 282 004 [1] and their mapping to DIAMETER AVPs.
ETSI
---------------------- Page: 9 ----------------------
10 Final draft ETSI ES 283 034 V2.2.0 (2008-05)
Table 1: Initial gate setting description
Information Mapping to Cat. Description
element name Diameter AVP

List of allowed NAS-Filter-Rule O In case of unicast data, the list of default destination IP addresses

destinations as ports, prefixes and port ranges to which traffic can be sent. In case of

well as multicast, the list of IP-Multicast group addresses and/or the list of

multicast flows (Source IP address, IP-Multicast group address) pairs which traffic can

be received from by the attached NASS User.

List of denied NAS-Filter-Rule O In case of unicast, the list of default destination IP addresses ports,

destinations as prefixes and port ranges to which traffic is denied. In case of multicast,

well as the list of IP-Multicast group addresses and/or the list of (Source IP

multicast flows address, IP-Multicast group address) pairs for which traffic towards the

attached NASS User must be denied.

UL Subscribed Maximum-Allowed- O The maximum amount of bandwidth that can be used without explicit

Bandwidth Bandwidth-UL authorization in the uplink direction.

DL Subscribed Maximum-Allowed- O The maximum amount of bandwidth that can be used without explicit

Bandwidth Bandwidth-DL authorization in the downlink direction.
Table 2: QoS profile description
Information Mapping to Cat. 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 NASS

Bandwidth Bandwidth-UL User in the uplink direction.

DL Subscribed Maximum-Allowed- O The maximum amount of bandwidth subscribed by the attached NASS

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 NASS User 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 NASS User, 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.
ETSI
---------------------- Page: 10 ----------------------
11 Final draft ETSI ES 283 034 V2.2.0 (2008-05)
Table 3: Access profile push
Information Mapping to Diameter Cat. Description
element name AVP
Globally Unique Globally-Unique-Address M This information element contains:
IP Address - The IP address of the NASS User 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 equipment is

ID connected.

Access Access-Network-Type O The type of access network over which IP connectivity is provided

Network Type to the user equipment.

NASS User ID User-Name C The NASS User that is attached to the network (see note).

Physical Physical-Access-Id O The identity of the physical access to which the user equipment is

Access ID connected.
Initial Gate Initial-Gate-Setting or O See clause 5.1, table 1.
Setting Initial-Gate-Setting-ID
QoS Profile QoS-Profile or QoS- O
...

SLOVENSKI STANDARD
SIST ES 283 034 V2.2.0:2009
01-marec-2009

=OLWHWHOHNRPXQLNDFLMVNHLQLQWHUQHWQHVWRULWYHWHUSURWRNROL]DQDSUHGQRRPUHåHQMH

7,63$1 3RGVLVWHPRPUHåQHSULNOMXþLWYH 1$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 2.2.0
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 V2.2.0:2009 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST ES 283 034 V2.2.0:2009
---------------------- Page: 2 ----------------------
SIST ES 283 034 V2.2.0:2009
ETSI ES 283 034 V2.2.0 (2008-07)
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 V2.2.0:2009
2 ETSI ES 283 034 V2.2.0 (2008-07)
Reference
RES/TISPAN-03139-NGN-R2
Keywords
interface, network, system
ETSI
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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

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

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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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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.

3GPP is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners.

ETSI
---------------------- Page: 4 ----------------------
SIST ES 283 034 V2.2.0:2009
3 ETSI ES 283 034 V2.2.0 (2008-07)
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 NASS User 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................................................................................................................................................................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-Description AVP.........................................................................................................21

7.3.5 QoS-Profile-Description AVP....................................................................................................................21

7.3.6 IP-Connectivity-Status AVP.......................................................................................................................22

7.3.7 Access-Network-Type AVP.......................................................................................................................22

ETSI
---------------------- Page: 5 ----------------------
SIST ES 283 034 V2.2.0:2009
4 ETSI ES 283 034 V2.2.0 (2008-07)

7.3.8 Aggregation-Network-Type AVP...............................................................................................................22

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............................................................................................................................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

7.3.22 Initial-Gate-Setting-ID AVP.......................................................................................................................24

7.3.23 QoS-Profile-ID 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
---------------------- Page: 6 ----------------------
SIST ES 283 034 V2.2.0:2009
5 ETSI ES 283 034 V2.2.0 (2008-07)
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: 7 ----------------------
SIST ES 283 034 V2.2.0:2009
6 ETSI ES 283 034 V2.2.0 (2008-07)
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: 8 ----------------------
SIST ES 283 034 V2.2.0:2009
7 ETSI ES 283 034 V2.2.0 (2008-07)

[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

The following referenced documents are not essential to the use of the present document but they assist the user with

regard to a particular subject area. For non-specific references, the latest version of the referenced document (including

any amendments) applies.
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].
NASS User: See definition in [1].
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
CLF Connectivity session Location and repository Function
DHCP Dynamic Host Configuration Protocol
FQDN Fully Qualified Domain Name
IANA Internet Assigned Numbers Authority
ID IDentifier
IETF Internet Engineering Task Force
IPSec IP Security
NAS Network Access Server
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NASS Network Attachment Sub-System
PDBF Profile Data Base Function
PNA Push-Notification-Answer
PNR Push-Notification-Request
QoS Quality of Service
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
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 uNASS Users 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
CLF
NASS
Scope of the present
A-RACF
document
RACS
Transfer Functions
Figure 1: NASS external interfaces
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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 tables 1 to 8) 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 tables 1 to 8) 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 tables 1 to 8) 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 NASS User profile

NASS User profile information sent over the e4 interface comprises QoS profile information and initial gate setting

information. Each of these pieces of information may be sent in the form of an identifier using the QoS-Profile-ID and

Initial-Gate-Setting-ID AVPs or in the form of an explicit description using the QoS-Profile-Description and Initial-

Gate-Setting-Description AVPs.

Tables 1 and 2 detail the information elements involved in the second case as defined in the NASS specification

ES 282 004 [1] and their mapping to DIAMETER AVPs.
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Table 1: Initial gate setting description
Information Mapping to Cat. Description
element name Diameter AVP

List of allowed NAS-Filter-Rule O In case of unicast data, the list of default destination IP addresses

destinations as ports, prefixes and port ranges to which traffic can be sent. In case of

well as multicast, the list of IP-Multicast group addresses and/or the list of

multicast flows (Source IP address, IP-Multicast group address) pairs which traffic can

be received from by the attached NASS User.

List of denied NAS-Filter-Rule O In case of unicast, the list of default destination IP addresses ports,

destinations as prefixes and port ranges to which traffic is denied. In case of multicast,

well as the list of IP-Multicast group addresses and/or the list of (Source IP

multicast flows address, IP-Multicast group address) pairs for which traffic towards the

attached NASS User must be denied.

UL Subscribed Maximum-Allowed- O The maximum amount of bandwidth that can be used without explicit

Bandwidth Bandwidth-UL authorization in the uplink direction.

DL Subscribed Maximum-Allowed- O The maximum amount of bandwidth that can be used without explicit

Bandwidth Bandwidth-DL authorization in the downlink direction.
Table 2: QoS profile description
Information Mapping to Cat. 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 NASS

Bandwidth Bandwidth-UL User in the uplink direction.

DL Subscribed Maximum-Allowed- O The maximum amount of bandwidth subscribed by the attached NASS

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 NASS User 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 NASS User, 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 E

...

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