ETSI EN 302 093-1 V1.1.1 (2000-06)

SLOVENSKI STANDARD
SIST EN 302 093-1 V1.1.1:2005
01-januar-2005
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Broadband Integrated Services Digital Network (B-ISDN); Digital Subscriber Signalling
System No. two (DSS2) protocol; Point-to-point multiconnection bearer control
specification in a separated call and bearer environment; Part 1: Protocol specification
Ta slovenski standard je istoveten z: EN 302 093-1 Version 1.1.1
ICS:
33.080 Digitalno omrežje z Integrated Services Digital
integriranimi storitvami Network (ISDN)
(ISDN)
SIST EN 302 093-1 V1.1.1:2005 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 302 093-1 V1.1.1:2005

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SIST EN 302 093-1 V1.1.1:2005
ETSI EN 302 093-1 V1.1.1 (2000-06)
European Standard (Telecommunications series)
Broadband Integrated Services Digital Network (B-ISDN);
Digital Subscriber Signalling System No. two (DSS2) protocol;
Point-to-point multiconnection bearer control specification
in a separated call and bearer environment;
Part 1: Protocol specification

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SIST EN 302 093-1 V1.1.1:2005
2 ETSI EN 302 093-1 V1.1.1 (2000-06)
Reference
DEN/SPS-05133-1
Keywords
bearer, B-ISDN, DSS2, layer 3, protocol, UNI
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© European Telecommunications Standards Institute 2000.
All rights reserved.
ETSI

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SIST EN 302 093-1 V1.1.1:2005
3 ETSI EN 302 093-1 V1.1.1 (2000-06)
Contents
Intellectual Property Rights.5
Foreword.5
1 Scope .6
2 References .6
3 Definitions.7
4 Abbreviations .7
5 Description .7
5.1 Application to interface structure .7
5.2 Capabilities supported by the present document .7
5.3 General overview .8
6 Operational requirements .8
6.1 Provision and withdrawal.8
6.2 Requirements on the originating network side .8
6.3 Requirements on the destination network side .8
7 Primitive definitions and state definitions.8
7.1 Primitive definitions.8
7.2 State definitions.9
8 Coding requirements .9
8.1 Messages .9
8.1.1 Modification to messages defined in EN 300 443-1.9
8.1.1.1 SETUP .9
8.1.1.2 Other messages .10
8.2 Information elements.10
8.2.1 Call association.10
8.2.2 Bearer identifier .11
8.2.3 Other information elements .11
9 Signalling procedures at the coincident S and T reference point .12
b b
9.1 Introduction .12
9.2 Establishment of a bearer .12
9.2.1 Additional procedures at a preceding side .12
9.2.1.1 Additional procedures at a preceding side that is a point of call/bearer coordination.12
9.2.1.2 Additional procedures at a preceding side that is not a point of call/bearer coordination.13
9.2.2 Additional procedures at a succeeding side .13
9.2.2.1 Additional procedures at a succeeding side that is not a point of call/bearer coordination.13
9.2.2.2 Additional procedures at a succeeding side that is a point of call/bearer coordination.13
9.3 Clearing of a connection.13
ETSI

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SIST EN 302 093-1 V1.1.1:2005
4 ETSI EN 302 093-1 V1.1.1 (2000-06)
10 Signalling procedures at the T reference point.14
b
11 Interworking with other networks .14
12 Interactions with supplementary services.14
13 Parameter values .14
14 Dynamic description SDLs .14
Annex A (informative): Guidelines for the use of the instruction indicator .15
Annex B (informative): Significance and use of the bearer identifier and call association at
the user-network interface .16
Bibliography.17
History .18
ETSI

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SIST EN 302 093-1 V1.1.1:2005
5 ETSI EN 302 093-1 V1.1.1 (2000-06)
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://www.etsi.org/ipr).
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 European Standard (Telecommunications series) has been produced by ETSI Technical Committee Signalling
Protocols and Switching (SPS).
The present document is part 1 of a multi-part standard covering the Digital Subscriber Signalling System No. two
(DSS2) protocol; Point-to-point multiconnection bearer control specification in a separated call and bearer environment,
as described below:
Part 1: "Protocol specification;
Part 2: "Protocol Implementation Conformance Statement (PICS) proforma specification";
Part 3: "Test Suite Structure and Test Purposes (TSS&TP) specification for the user";
Part 4: "Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT)
proforma specification for the user".
The Protocol specification, of the present document, builds upon the basic call control procedures defined in
EN 300 443-1 [5] by adding protocol elements and procedures required to enable separate call and bearer control.
National transposition dates
Date of adoption of this EN: 5 May 2000
Date of latest announcement of this EN (doa): 31 August 2000
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 28 February 2001
Date of withdrawal of any conflicting National Standard (dow): 28 February 2001
ETSI

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SIST EN 302 093-1 V1.1.1:2005
6 ETSI EN 302 093-1 V1.1.1 (2000-06)
1 Scope
The present document specifies the procedures for establishing, maintaining and clearing of bearer connections to point-
to-point multiconnection calls at the B-ISDN user-network interface.
It specifies the essential features, procedures, and messages required for controlling bearer connections associated to
point-to-point multiconnection calls in a functionally separated call and bearer control environment.
The procedures specified by the present document are applicable at the interface between a B-ISDN terminal equipment
and a B-ISDN public network (coincident S and T reference point) as well as at the interface between a B-ISDN
b b
customer network and a B-ISDN public network (i.e. at the T reference point).
b
The separated bearer control protocol defined by the present document is applicable to control bearers associated to a
multiconnection call which is controlled independently by means of a separate call control protocol.
2 References
The following documents contain provisions which, through reference in this text, constitute provisions of the present
document.
• References are either specific (identified by date of publication, edition number, version number, etc.) or non-
specific.
• For a specific reference, subsequent revisions do not apply.
• For a non-specific reference, subsequent revisions do apply.
• A non-specific reference to an ETS shall also be taken to refer to later versions published as an EN with the same
number.
[1] ETSI EN 302 091-1: "Broadband Integrated Services Digital Network (B-ISDN) and Broadband
Private Integrated Services Network (B-PISN); Digital Subscriber Signalling System No. two
(DSS2), Broadband Inter-Exchange Signalling (B-QSIG), and Signalling System No. 7 (SS7);
Prenegotiation; Part 1: Protocol specification".
[2] ETSI ETS 300 437-1: "Broadband Integrated Services Digital Network (B-ISDN); Signalling
ATM Adaptation Layer (SAAL); Service Specific Co-ordination Function (SSCF) for support of
signalling at the User-Network Interface (UNI); Part 1: Specification of SSCF at UNI [ITU-T
Recommendation Q.2130 (1995), modified]".
[3] ETSI ETS 301 067-1: "Broadband Integrated Services Digital Network (B-ISDN); Digital
Subscriber Signalling System No. two (DSS2) protocol; Connection characteristics; Negotiation
during call/connection establishment phase; Part 1: Protocol specification [ITU-T
Recommendation Q.2962 (1996), modified]".
[4] ETSI ETS 301 003-1: "Broadband Integrated Services Digital Network (B-ISDN); Digital
Subscriber Signalling System No. two (DSS2) protocol; Connection characteristics; Peak cell rate
modification by the connection owner; Part 1: Protocol specification [ITU-T Recommendation
Q.2963.1 (1996), modified".
[5] ETSI EN 300 443-1: "Broadband Integrated Services Digital Network (B-ISDN); Digital
Subscriber Signalling System No. two (DSS2) protocol; B-ISDN user-network interface layer 3
specification for basic call/bearer control; Part 1: Protocol specification [ITU-T Recommendation
Q.2931 (1995), modified]".
[6] ITU-T Recommendation I.413: "B-ISDN user-network interface".
[7] ETSI EN 301 068-1: "Broadband Integrated Services Digital Network (B-ISDN); Digital
Subscriber Signalling System No. two (DSS2) protocol; Connection characteristics; ATM transfer
capability and traffic parameter indication; Part 1: Protocol specification [ITU-T
Recommendations Q.2961.1 (1995), Q.2961.2 (1997), Q.2961.3 (1997), Q.2961.4 (1997),
modified]".
ETSI

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SIST EN 302 093-1 V1.1.1:2005
7 ETSI EN 302 093-1 V1.1.1 (2000-06)
3 Definitions
For the purposes of the present document, the following terms and definitions apply:
connection state: state for each connection (see subclause 7.2) which is known by the layer 3 Bearer Control entity.
The different Connection states correspond to the call/connection states defined in clause 2 of EN 300 443-1 [5], i.e. the
states of the Q.2931 protocol entities on both sides of the UNI and relate to each call associated bearer.
bearer identifier: identifier used to identify a bearer instance to which a particular bearer establishment request relates
between two CC entities. The value of the bearer identifier is significant between two adjacent CC entities. The value is
unique within a call between two adjacent CC entities.
call association: identifier used to identify a multiconnection call instance to which a particular bearer establishment
request relates between two CC entities. The value of a call identifier is significant between two adjacent call control
entities. The value carried in the call association is significant between two adjacent CC entities.
preceding side: with respect to a given bearer, the side of an interface between two bearer control entities from which
bearer establishment across the interface originates.
succeeding side: with respect to a given bearer, the side (opposite to the preceding side) of an interface between two
bearer control entities which receives bearer establishment request across the interface.
4 Abbreviations
For the purposes of the present document, the following abbreviations apply:
ATM Asynchronous Transfer Mode
BC Bearer Control
CC Call Control
B-ISDN Broadband Integrated Services Digital Network
DSS2 Digital Subscriber Signalling System No 2
SAAL Signalling ATM Adaptation Layer
SDL Specification and Description Language
UNI User-Network Interface
5 Description
5.1 Application to interface structure
The bearer control procedures apply to the interface structures defined in ITU-T Recommendation I.413 [6]. They use
the functions and services provided by layer 2 (i.e. the SAAL). The layer 3 procedures request the services of layer 2
and receive information from layer 2 using the primitives defined in ETS 300 437-1 [2]. These primitives are used to
illustrate the communication between the protocol layers and are not intended to specify or constrain implementations.
5.2 Capabilities supported by the present document
The present document builds upon the basic point-to-point combined call/bearer control protocol defined in
EN 300 443-1 [5] to enable the separate control of bearers being associated to a multiconnection call.
ETSI

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SIST EN 302 093-1 V1.1.1:2005
8 ETSI EN 302 093-1 V1.1.1 (2000-06)
5.3 General overview
The present document provides the procedures, messages and information elements needed for establishing,
maintaining and clearing of bearer connections being associated with a point-to-point multiconnection call.
After a multiconnection call has been initiated or has progressed to the active state, bearer connections can be added to
the call by individual bearer connection set-up requests from the calling party or the called party, using the separated
bearer control protocol specified in the present document, which is based on the procedures in EN 300 443-1 [5]. Each
new connection establishment request shall use a new call reference (see clause 4 of EN 300 443-1 [5]). Bearers may be
established or released from the multiconnection call at any time while not modifying the call state. New connections
can be established by the calling party or the called party by sending a SETUP message as defined in EN 300 443-1 [5],
which in addition contains the call association information element in order to associate that bearer with the
multiconnection call. Connections may be released from the call by the calling party or the called party by sending a
RELEASE message as defined in EN 300 443-1 [5].
The individual bearers are controlled independently. In particular, multiple bearer connection establishment requests
may be initiated in parallel (i.e. the requesting party does not need to wait for a response related to one bearer
connection set-up request before issuing another one). Similarly, multiple bearer connection release requests may be
pending at the same tim
...