ETSI ETS 300 217-2 ed.1 (1992-12)

Network Aspects (NA); Connectionless Broadband Data Service (CBDS); Part 2: Basic bearer service definition

DE/NA-053201-2

Omrežni vidiki (NA) – Nepovezavna širokopasovna podatkovna storitev (CBDS) – 2. del: Definicija osnovne nosilne storitve

General Information

• Status: Published
• Publication Date: 09-Dec-1992
• Technical Committee: NA 5 - Broadband Networks
• Current Stage: 12 - Completion
• Due Date: 04-Dec-1992
• Completion Date: 10-Dec-1992
• Ref Project: SIST ETS 300 217-2 E1:2003 - Network Aspects (NA); Connectionless Broadband Data Service (CBDS); Part 2: Basic bearer service definition

Standards Content (Sample)

SLOVENSKI STANDARD
SIST ETS 300 217-2 E1:2003
01-december-2003
Omrežni vidiki (NA) – Nepovezavna širokopasovna podatkovna storitev (CBDS) –
2. del: Definicija osnovne nosilne storitve
Network Aspects (NA); Connectionless Broadband Data Service (CBDS); Part 2: Basic
bearer service definition
Ta slovenski standard je istoveten z: ETS 300 217-2 Edition 1
ICS:
33.040.40 Podatkovna komunikacijska Data communication
omrežja networks
SIST ETS 300 217-2 E1:2003 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST ETS 300 217-2 E1:2003
EUROPEAN ETS 300 217-2
TELECOMMUNICATION December 1992
STANDARD
Source: ETSI TC-NA Reference: DE/NA-053201-2
ICS: 33.040
Network, CBDS
Key words:
Network Aspects (NA);
Connectionless Broadband Data Service (CBDS)
Part 2: Basic bearer service definition
ETSI
European Telecommunications Standards Institute
ETSI Secretariat
F-06921 Sophia Antipolis CEDEX - FRANCE
Postal address:
650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE
Office address:
c=fr, a=atlas, p=etsi, s=secretariat - [e-mail]
X.400: Internet:
Tel.: [phone] - Fax: [phone]
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 1992. All rights reserved.
New presentation - see History box

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Whilst every care has been taken in the preparation and publication of this document, errors in content,
typographical or otherwise, may occur. If you have comments concerning its accuracy, please write to
"ETSI Editing and Committee Support Dept." at the address shown on the title page.

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Contents
Foreword .5
1 Scope .7
2 Normative references.7
3 Definitions and abbreviations .7
3.1 Definitions .7
3.2 Abbreviations .8
4 Description .8
5 Procedures.9
5.1 Provision and withdrawal .9
5.1.1 Subscriber options.9
5.1.1.1 Access rate.9
5.1.1.2 Access classes.10
5.1.1.3 PDU interleaving.10
5.1.1.4 Protocols.11
5.2 Normal procedures .11
5.3 Exceptional procedures .11
6 Network capabilities for charging .11
7 Interworking requirements.11
8 Interaction with supplementary services .11
9 Static description of the service using attributes .11
9.1 Information transfer attributes.11
9.1.1 Information transfer mode.11
9.1.2 Connection mode .12
9.1.3 Information transfer rate.12
9.1.4 Information transfer capability .12
9.1.5 Structure.12
9.1.6 Establishment of communication .12
9.1.7 Symmetry .12
9.1.8 Communication configuration.13
9.2 Access attributes .13
9.2.1 Access rate and MIR.13
9.2.1.1 Values for the UMI and UNI interfaces.13
9.2.1.2 Values for the USI interface.14
9.2.2 Access classes.14
9.2.2.1 Access classes for the UMI and UNI interfaces .14
9.2.2.2 Access classes for the USI interface.14
9.2.3 PDU interleaving.15
9.2.3.1 PDU interleaving across the UMI/UNI .15
9.2.3.2 PDU interleaving across the USI .15
9.3 General attributes .15
9.3.1 Supplementary services provided .15
9.3.2 Quality of service.15
9.3.3 Payload length.17
9.3.4 Interworking possibilities .17
9.3.5 Operational and commercial .17
Annex A (normative): Access class mechanisms .18

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A.1 Access class mechanism for UMI . 18
A.2 Access class mechanism for UNI. 19
A.3 Access class mechanism for USI. 19
Annex B (informative): Bibliography . 20
History. 21

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ETS 300 217-2: December 1992
Foreword
This part of European Telecommunication Standard (ETS) 300 217 has been prepared by the Network
Aspects (NA) Technical Committee of the European Telecommunications Standards Institute (ETSI).
According to CCITT Recommendation I.130, the following three level structure is used to describe the
characterisation of telecommunication services:
- Stage 1: is an overall service description, from the user's standpoint;
- Stage 2: identifies the functional capabilities and information flows needed to support the service
described in stage 1;
- Stage 3: defines the signalling system protocols and switching functions needed to implement the
service described in stage 1.
This ETS details the stage 1 aspects for the Connectionless Broadband Data Service (CBDS).
This part constitutes Part 2 of the 4 part ETS on the CBDS, and defines the basic bearer service.
A list of informative references is given in Annex B.

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ETS 300 217-2: December 1992
1 Scope
This part of European Telecommunication Standard (ETS) 300 217 on the Connectionless Broadband
Data Service (CBDS), describes the stage 1 of the switched bearer service provided via Metropolitan Area
Networks (MANs) and/or an Asynchronous Transfer Mode (ATM) based network. It is applicable to both
the public and private environment whereas special attention is paid to the requirements of the public
operators.
This bearer service category provides a means by which Protocol Data Units (PDUs) of variable, but
limited length, are delimited and transparently transferred across one source interface to one or more
destination interface(s) at the T reference point, without establishing or later releasing a connection
between source and destination.
Charging principles are outside the scope of this ETS.
Whilst this bearer service category is aiming primarily at Local Area Network (LAN) interconnections, other
uses are envisaged.
2 Normative references
This ETS incorporates, by dated or undated reference, provisions from other publications. These
normative references are cited at the appropriate places in the text and the publications are listed
hereafter. For dated references, subsequent amendments to, or revisions of any of these publications
apply to this ETS only when incorporated in it by amendment or revision. For undated references the latest
edition of the publication referred to applies.
[1] CCITT Recommendation E.164 (1991): "Numbering plan for the ISDN era".
[2] ISO/IEC 8802-3 (1990): "Information processing systems - Local area networks
- Part 3: Carrier sense multiple access with collision detection (CSMA/CD) -
access method and physical layer specifications".
[3] ISO/IEC 8802-5 (1991): "Information processing systems - Local area networks
- Part 5: Token ring access method and physical layer specifications".
[4] IEEE 802.6 (1990): "Distributed Queue Dual Bus (DQDB) subnetwork of a
metropolitan area network (MAN)".
[5] CCITT Recommendation I.140 (1988): "Attribute technique for the
characterization of telecommunication services supported by an ISDN and
network capabilities of an ISDN".
[6] ETS 300 217-1 (1992): "Network Aspects (NA); Connectionless Broadband Data
Service (CBDS) Part 1: Overview".
[7] ISO 9314: "Fiber Distributed Data Interface (FDDI)".
3 Definitions and abbreviations
3.1 Definitions
The definitions used in this ETS are given in Part 1, subclause 3.1 of this ETS, ETS 300 217-1 [6].

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3.2 Abbreviations
For the purposes of this ETS, the following abbreviations apply:
AAL ATM Adaptation Layer
ATM Asynchronous Transfer Mode
CBDS Connectionless Broadband Data Service
CCITT International Telegraph and Telephone Consultative Committee
DQDB Distributed Queue Dual Bus
HDLC High level Data Link Control
LAN Local Area Network
LAPB Link Access Procedure Balanced
LAPD Link Access Procedure on the D-channel
LLC Logical Link Control
MAC Media Access Control
MAN Metropolitan Area Network
MIR Maximum Information Rate
PDU Protocol Data Unit
PLCP Physical Layer Convergence Procedure
QOS Quality of Service
SIR Sustained Information Rate
T T reference point
UMI User MAN Interface
UNI User Network Interface
USI User Specific Interface
4 Description
This bearer service category can be provided by any network but can more suitably be provided by MANs
and ATM-based networks. It primarily aims at interconnecting LANs and/or terminals over metropolitan or
wide areas.
The service can be provided by making use of different interfaces (User Specific Interface (USI), User
MAN Interface (UMI) or User Network Interface (UNI)).
Associated with this bearer service category are Quality of Service (QOS) parameters. Parameter values
for which options are explicitly mentioned may be negotiated between parties in the subscriber and service
provider domains respectively.
The service may be provided by direct access via high-speed end systems or by means of bridges or
routers using the connectionless service mode.

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For the UMI and UNI interfaces each user can be addressed by at least one CCITT Recommendation
E.164 [1] number. When publicly administered, one USI is identified by only one CCITT Recommendation
E.164 [1] number.
5 Procedures
5.1 Provision and withdrawal
The provision of the service shall be by pre-arrangement with the service provider.
The service provider may not provide either all service options and supplementary services listed in this
ETS or the full range of features in a particular option e.g. available access classes. This ETS is a
compendium list and specific options shall be defined on subscription.
The bearer service is offered with several subscription options which apply separately to each interface at
the T reference point.
5.1.1 Subscriber options
The subscriber can choose different subscriber options. For each subscriber option one value can be
selected.
The provision of any specific subscriber options and related values within those defined in this subclause
depends on the choice of the service provider.
5.1.1.1 Access rate
The service can be provided making use of different interfaces, i.e. the USI, UMI or the UNI. Different
access rates are foreseen for the UMI:
- 2,048 Mbit/s;
- 34,368 Mbit/s;
- 139,264 Mbit/s;
- 155,520 Mbit/s.
The following access rates are foreseen for the UNI:
- 155,520 Mbit/s;
- 622,080 Mbit/s.
Further access rates may be considered according to ETSI or CCITT standardisation.
The following access rates are foreseen for the USI:
- 4 Mbit/s;
- 10 Mbit/s;
- 16 Mbit/s;
- 100 Mbit/s.

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5.1.1.2 Access classes
The access class defines the information transfer capacity the subscriber subscribes to, in terms of
maximum allowed Sustained Information Rate (SIR) across the interface at the T reference point.
Upon subscription the subscriber can choose between different sending access classes. This depends on
the access rate and the protocols (see table 1).
Table 1: Values of maximum allowed SIR for different access classes
Access class SIR (Mbit/s)
A 1,473
B4*
C 10*
D 16*
E 25,201
F 103,605
G 123,629
H 155*
I 100*
* : Nominal value. The exact values are for further study.
In the basic bearer service the receiving access class cannot be chosen. It is equal to the Maximum
Information Rate (MIR) allowed by the access rate and protocol chosen (see tables 5 and 6 in subclauses
9.2.1.1 and 9.2.1.2).
If there are other services provided on the same access link, this shall reduce the MIR for sending and
receiving access classes available at the UMI and UNI for the connectionless service on the access.
5.1.1.3 PDU interleaving
Upon subscription, the subscriber can choose between different values for the number of PDUs which
may be in transit concurrently across the interface at the T reference point. This applies to the send and
receive direction of the network (see table
...